drivers/char/cyclades.c

   1 #undef  BLOCKMOVE
   2 #define Z_WAKE
   3 #undef  Z_EXT_CHARS_IN_BUFFER
   4
   5 /*
   6  *  linux/drivers/char/cyclades.c
   7  *
   8  * This file contains the driver for the Cyclades async multiport
   9  * serial boards.
  10  *
  11  * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
  12  * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
  13  * Currently maintained by Cyclades team <async@cyclades.com>.
  14  *
  15  * For Technical support and installation problems, please send e-mail
  16  * to support@cyclades.com.
  17  *
  18  * Much of the design and some of the code came from serial.c
  19  * which was copyright (C) 1991, 1992  Linus Torvalds.  It was
  20  * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
  21  * and then fixed as suggested by Michael K. Johnson 12/12/92.
  22  *
  23  * This version supports shared IRQ's (only for PCI boards).
  24  *
  25  * $Log: cyclades.c,v $
  26  * Prevent users from opening non-existing Z ports.
  27  *
  28  * Revision 2.3.2.8   2000/07/06 18:14:16 ivan
  29  * Fixed the PCI detection function to work properly on Alpha systems.
  30  * Implemented support for TIOCSERGETLSR ioctl.
  31  * Implemented full support for non-standard baud rates.
  32  *
  33  * Revision 2.3.2.7   2000/06/01 18:26:34 ivan
  34  * Request PLX I/O region, although driver doesn't use it, to avoid
  35  * problems with other drivers accessing it.
  36  * Removed count for on-board buffer characters in cy_chars_in_buffer
  37  * (Cyclades-Z only).
  38  *
  39  * Revision 2.3.2.6   2000/05/05 13:56:05 ivan
  40  * Driver now reports physical instead of virtual memory addresses.
  41  * Masks were added to some Cyclades-Z read accesses.
  42  * Implemented workaround for PLX9050 bug that would cause a system lockup
  43  * in certain systems, depending on the MMIO addresses allocated to the
  44  * board.
  45  * Changed the Tx interrupt programming in the CD1400 chips to boost up
  46  * performance (Cyclom-Y only).
  47  * Code is now compliant with the new module interface (module_[init|exit]).
  48  * Make use of the PCI helper functions to access PCI resources.
  49  * Did some code "housekeeping".
  50  *
  51  * Revision 2.3.2.5   2000/01/19 14:35:33 ivan
  52  * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
  53  *
  54  * Revision 2.3.2.4   2000/01/17 09:19:40 ivan
  55  * Fixed SMP locking in Cyclom-Y interrupt handler.
  56  *
  57  * Revision 2.3.2.3   1999/12/28 12:11:39 ivan
  58  * Added a new cyclades_card field called nports to allow the driver to
  59  * know the exact number of ports found by the Z firmware after its load;
  60  * RX buffer contention prevention logic on interrupt op mode revisited
  61  * (Cyclades-Z only);
  62  * Revisited printk's for Z debug;
  63  * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
  64  *
  65  * Revision 2.3.2.2   1999/10/01 11:27:43 ivan
  66  * Fixed bug in cyz_poll that would make all ports but port 0
  67  * unable to transmit/receive data (Cyclades-Z only);
  68  * Implemented logic to prevent the RX buffer from being stuck with data
  69  * due to a driver / firmware race condition in interrupt op mode
  70  * (Cyclades-Z only);
  71  * Fixed bug in block_til_ready logic that would lead to a system crash;
  72  * Revisited cy_close spinlock usage;
  73  *
  74  * Revision 2.3.2.1   1999/09/28 11:01:22 ivan
  75  * Revisited CONFIG_PCI conditional compilation for PCI board support;
  76  * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
  77  * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
  78  * Removed CTS handling from the driver -- this is now completely handled
  79  * by the firmware (Cyclades-Z only);
  80  * Flush RX on-board buffers on a port open (Cyclades-Z only);
  81  * Fixed handling of ASYNC_SPD_* TTY flags;
  82  * Module unload now unmaps all memory area allocated by ioremap;
  83  *
  84  * Revision 2.3.1.1   1999/07/15 16:45:53 ivan
  85  * Removed CY_PROC conditional compilation;
  86  * Implemented SMP-awareness for the driver;
  87  * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
  88  * functions;
  89  * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
  90  * (irq=NN) as parameters (only for ISA boards);
  91  * Fixed bug in set_line_char that would prevent the Cyclades-Z
  92  * ports from being configured at speeds above 115.2Kbps;
  93  * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
  94  * switching from working properly;
  95  * The driver now only prints IRQ info for the Cyclades-Z if it's
  96  * configured to work in interrupt mode;
  97  *
  98  * Revision 2.2.2.3   1999/06/28 11:13:29 ivan
  99  * Added support for interrupt mode operation for the Z cards;
 100  * Removed the driver inactivity control for the Z;
 101  * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
 102  * the Z firmware is not loaded yet;
 103  * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
 104  * same functionality;
 105  * Implemented workaround for IRQ setting loss on the PCI configuration
 106  * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
 107  *
 108  * Revision 2.2.2.2  1999/05/14 17:18:15 ivan
 109  * /proc entry location changed to /proc/tty/driver/cyclades;
 110  * Added support to shared IRQ's (only for PCI boards);
 111  * Added support for Cobalt Qube2 systems;
 112  * IRQ [de]allocation scheme revisited;
 113  * BREAK implementation changed in order to make use of the 'break_ctl'
 114  * TTY facility;
 115  * Fixed typo in TTY structure field 'driver_name';
 116  * Included a PCI bridge reset and EEPROM reload in the board
 117  * initialization code (for both Y and Z series).
 118  *
 119  * Revision 2.2.2.1  1999/04/08 16:17:43 ivan
 120  * Fixed a bug in cy_wait_until_sent that was preventing the port to be
 121  * closed properly after a SIGINT;
 122  * Module usage counter scheme revisited;
 123  * Added support to the upcoming Y PCI boards (i.e., support to additional
 124  * PCI Device ID's).
 125  *
 126  * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
 127  * Removed all unnecessary page-alignement operations in ioremap calls
 128  * (ioremap is currently safe for these operations).
 129  *
 130  * Revision 2.2.1.9  1998/12/30 18:18:30 ivan
 131  * Changed access to PLX PCI bridge registers from I/O to MMIO, in
 132  * order to make PLX9050-based boards work with certain motherboards.
 133  *
 134  * Revision 2.2.1.8  1998/11/13 12:46:20 ivan
 135  * cy_close function now resets (correctly) the tty->closing flag;
 136  * JIFFIES_DIFF macro fixed.
 137  *
 138  * Revision 2.2.1.7  1998/09/03 12:07:28 ivan
 139  * Fixed bug in cy_close function, which was not informing HW of
 140  * which port should have the reception disabled before doing so;
 141  * fixed Cyclom-8YoP hardware detection bug.
 142  *
 143  * Revision 2.2.1.6  1998/08/20 17:15:39 ivan
 144  * Fixed bug in cy_close function, which causes malfunction
 145  * of one of the first 4 ports when a higher port is closed
 146  * (Cyclom-Y only).
 147  *
 148  * Revision 2.2.1.5  1998/08/10 18:10:28 ivan
 149  * Fixed Cyclom-4Yo hardware detection bug.
 150  *
 151  * Revision 2.2.1.4  1998/08/04 11:02:50 ivan
 152  * /proc/cyclades implementation with great collaboration of
 153  * Marc Lewis <marc@blarg.net>;
 154  * cyy_interrupt was changed to avoid occurrence of kernel oopses
 155  * during PPP operation.
 156  *
 157  * Revision 2.2.1.3  1998/06/01 12:09:10 ivan
 158  * General code review in order to comply with 2.1 kernel standards;
 159  * data loss prevention for slow devices revisited (cy_wait_until_sent
 160  * was created);
 161  * removed conditional compilation for new/old PCI structure support
 162  * (now the driver only supports the new PCI structure).
 163  *
 164  * Revision 2.2.1.1  1998/03/19 16:43:12 ivan
 165  * added conditional compilation for new/old PCI structure support;
 166  * removed kernel series (2.0.x / 2.1.x) conditional compilation.
 167  *
 168  * Revision 2.1.1.3  1998/03/16 18:01:12 ivan
 169  * cleaned up the data loss fix;
 170  * fixed XON/XOFF handling once more (Cyclades-Z);
 171  * general review of the driver routines;
 172  * introduction of a mechanism to prevent data loss with slow
 173  * printers, by forcing a delay before closing the port.
 174  *
 175  * Revision 2.1.1.2  1998/02/17 16:50:00 ivan
 176  * fixed detection/handling of new CD1400 in Ye boards;
 177  * fixed XON/XOFF handling (Cyclades-Z);
 178  * fixed data loss caused by a premature port close;
 179  * introduction of a flag that holds the CD1400 version ID per port
 180  * (used by the CYGETCD1400VER new ioctl).
 181  *
 182  * Revision 2.1.1.1  1997/12/03 17:31:19 ivan
 183  * Code review for the module cleanup routine;
 184  * fixed RTS and DTR status report for new CD1400's in get_modem_info;
 185  * includes anonymous changes regarding signal_pending.
 186  *
 187  * Revision 2.1  1997/11/01 17:42:41 ivan
 188  * Changes in the driver to support Alpha systems (except 8Zo V_1);
 189  * BREAK fix for the Cyclades-Z boards;
 190  * driver inactivity control by FW implemented;
 191  * introduction of flag that allows driver to take advantage of
 192  * a special CD1400 feature related to HW flow control;
 193  * added support for the CD1400  rev. J (Cyclom-Y boards);
 194  * introduction of ioctls to:
 195  *  - control the rtsdtr_inv flag (Cyclom-Y);
 196  *  - control the rflow flag (Cyclom-Y);
 197  *  - adjust the polling interval (Cyclades-Z);
 198  *
 199  * Revision 1.36.4.33  1997/06/27 19:00:00  ivan
 200  * Fixes related to kernel version conditional
 201  * compilation.
 202  *
 203  * Revision 1.36.4.32  1997/06/14 19:30:00  ivan
 204  * Compatibility issues between kernels 2.0.x and
 205  * 2.1.x (mainly related to clear_bit function).
 206  *
 207  * Revision 1.36.4.31  1997/06/03 15:30:00  ivan
 208  * Changes to define the memory window according to the
 209  * board type.
 210  *
 211  * Revision 1.36.4.30  1997/05/16 15:30:00  daniel
 212  * Changes to support new cycladesZ boards.
 213  *
 214  * Revision 1.36.4.29  1997/05/12 11:30:00  daniel
 215  * Merge of Bentson's and Daniel's version 1.36.4.28.
 216  * Corrects bug in cy_detect_pci: check if there are more
 217  * ports than the number of static structs allocated.
 218  * Warning message during initialization if this driver is
 219  * used with the new generation of cycladesZ boards.  Those
 220  * will be supported only in next release of the driver.
 221  * Corrects bug in cy_detect_pci and cy_detect_isa that
 222  * returned wrong number of VALID boards, when a cyclomY
 223  * was found with no serial modules connected.
 224  * Changes to use current (2.1.x) kernel subroutine names
 225  * and created macros for compilation with 2.0.x kernel,
 226  * instead of the other way around.
 227  *
 228  * Revision 1.36.4.28  1997/05/?? ??:00:00  bentson
 229  * Change queue_task_irq_off to queue_task_irq.
 230  * The inline function queue_task_irq_off (tqueue.h)
 231  * was removed from latest releases of 2.1.x kernel.
 232  * Use of macro __init to mark the initialization
 233  * routines, so memory can be reused.
 234  * Also incorporate implementation of critical region
 235  * in function cleanup_module() created by anonymous
 236  * linuxer.
 237  *
 238  * Revision 1.36.4.28  1997/04/25 16:00:00  daniel
 239  * Change to support new firmware that solves DCD problem:
 240  * application could fail to receive SIGHUP signal when DCD
 241  * varying too fast.
 242  *
 243  * Revision 1.36.4.27  1997/03/26 10:30:00  daniel
 244  * Changed for support linux versions 2.1.X.
 245  * Backward compatible with linux versions 2.0.X.
 246  * Corrected illegal use of filler field in
 247  * CH_CTRL struct.
 248  * Deleted some debug messages.
 249  *
 250  * Revision 1.36.4.26  1997/02/27 12:00:00  daniel
 251  * Included check for NULL tty pointer in cyz_poll.
 252  *
 253  * Revision 1.36.4.25  1997/02/26 16:28:30  bentson
 254  * Bill Foster at Blarg! Online services noticed that
 255  * some of the switch elements of -Z modem control
 256  * lacked a closing "break;"
 257  *
 258  * Revision 1.36.4.24  1997/02/24 11:00:00  daniel
 259  * Changed low water threshold for buffer xmit_buf
 260  *
 261  * Revision 1.36.4.23  1996/12/02 21:50:16  bentson
 262  * Marcio provided fix to modem status fetch for -Z
 263  *
 264  * Revision 1.36.4.22  1996/10/28 22:41:17  bentson
 265  * improve mapping of -Z control page (thanks to Steve
 266  * Price <stevep@fa.tdktca.com> for help on this)
 267  *
 268  * Revision 1.36.4.21  1996/09/10 17:00:10  bentson
 269  * shift from CPU-bound to memcopy in cyz_polling operation
 270  *
 271  * Revision 1.36.4.20  1996/09/09 18:30:32  Bentson
 272  * Added support to set and report higher speeds.
 273  *
 274  * Revision 1.36.4.19c  1996/08/09 10:00:00  Marcio Saito
 275  * Some fixes in the HW flow control for the BETA release.
 276  * Don't try to register the IRQ.
 277  *
 278  * Revision 1.36.4.19  1996/08/08 16:23:18  Bentson
 279  * make sure "cyc" appears in all kernel messages; all soft interrupts
 280  * handled by same routine; recognize out-of-band reception; comment
 281  * out some diagnostic messages; leave RTS/CTS flow control to hardware;
 282  * fix race condition in -Z buffer management; only -Y needs to explicitly
 283  * flush chars; tidy up some startup messages;
 284  *
 285  * Revision 1.36.4.18  1996/07/25 18:57:31  bentson
 286  * shift MOD_INC_USE_COUNT location to match
 287  * serial.c; purge some diagnostic messages;
 288  *
 289  * Revision 1.36.4.17  1996/07/25 18:01:08  bentson
 290  * enable modem status messages and fetch & process them; note
 291  * time of last activity type for each port; set_line_char now
 292  * supports more than line 0 and treats 0 baud correctly;
 293  * get_modem_info senses rs_status;
 294  *
 295  * Revision 1.36.4.16  1996/07/20 08:43:15  bentson
 296  * barely works--now's time to turn on
 297  * more features 'til it breaks
 298  *
 299  * Revision 1.36.4.15  1996/07/19 22:30:06  bentson
 300  * check more -Z board status; shorten boot message
 301  *
 302  * Revision 1.36.4.14  1996/07/19 22:20:37  bentson
 303  * fix reference to ch_ctrl in startup; verify return
 304  * values from cyz_issue_cmd and cyz_update_channel;
 305  * more stuff to get modem control correct;
 306  *
 307  * Revision 1.36.4.13  1996/07/11 19:53:33  bentson
 308  * more -Z stuff folded in; re-order changes to put -Z stuff
 309  * after -Y stuff (to make changes clearer)
 310  *
 311  * Revision 1.36.4.12  1996/07/11 15:40:55  bentson
 312  * Add code to poll Cyclades-Z.  Add code to get & set RS-232 control.
 313  * Add code to send break.  Clear firmware ID word at startup (so
 314  * that other code won't talk to inactive board).
 315  *
 316  * Revision 1.36.4.11  1996/07/09 05:28:29  bentson
 317  * add code for -Z in set_line_char
 318  *
 319  * Revision 1.36.4.10  1996/07/08 19:28:37  bentson
 320  * fold more -Z stuff (or in some cases, error messages)
 321  * into driver; add text to "don't know what to do" messages.
 322  *
 323  * Revision 1.36.4.9  1996/07/08 18:38:38  bentson
 324  * moved compile-time flags near top of file; cosmetic changes
 325  * to narrow text (to allow 2-up printing); changed many declarations
 326  * to "static" to limit external symbols; shuffled code order to
 327  * coalesce -Y and -Z specific code, also to put internal functions
 328  * in order of tty_driver structure; added code to recognize -Z
 329  * ports (and for moment, do nothing or report error); add cy_startup
 330  * to parse boot command line for extra base addresses for ISA probes;
 331  *
 332  * Revision 1.36.4.8  1996/06/25 17:40:19  bentson
 333  * reorder some code, fix types of some vars (int vs. long),
 334  * add cy_setup to support user declared ISA addresses
 335  *
 336  * Revision 1.36.4.7  1996/06/21 23:06:18  bentson
 337  * dump ioctl based firmware load (it's now a user level
 338  * program); ensure uninitialzed ports cannot be used
 339  *
 340  * Revision 1.36.4.6  1996/06/20 23:17:19  bentson
 341  * rename vars and restructure some code
 342  *
 343  * Revision 1.36.4.5  1996/06/14 15:09:44  bentson
 344  * get right status back after boot load
 345  *
 346  * Revision 1.36.4.4  1996/06/13 19:51:44  bentson
 347  * successfully loads firmware
 348  *
 349  * Revision 1.36.4.3  1996/06/13 06:08:33  bentson
 350  * add more of the code for the boot/load ioctls
 351  *
 352  * Revision 1.36.4.2  1996/06/11 21:00:51  bentson
 353  * start to add Z functionality--starting with ioctl
 354  * for loading firmware
 355  *
 356  * Revision 1.36.4.1  1996/06/10 18:03:02  bentson
 357  * added code to recognize Z/PCI card at initialization; report
 358  * presence, but card is not initialized (because firmware needs
 359  * to be loaded)
 360  *
 361  * Revision 1.36.3.8  1996/06/07 16:29:00  bentson
 362  * starting minor number at zero; added missing verify_area
 363  * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
 364  *
 365  * Revision 1.36.3.7  1996/04/19 21:06:18  bentson
 366  * remove unneeded boot message & fix CLOCAL hardware flow
 367  * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
 368  * remove unused diagnostic statements; minor 0 is first;
 369  *
 370  * Revision 1.36.3.6  1996/03/13 13:21:17  marcio
 371  * The kernel function vremap (available only in later 1.3.xx kernels)
 372  * allows the access to memory addresses above the RAM. This revision
 373  * of the driver supports PCI boards below 1Mb (device id 0x100) and
 374  * above 1Mb (device id 0x101).
 375  *
 376  * Revision 1.36.3.5  1996/03/07 15:20:17  bentson
 377  * Some global changes to interrupt handling spilled into
 378  * this driver--mostly unused arguments in system function
 379  * calls.  Also added change by Marcio Saito which should
 380  * reduce lost interrupts at startup by fast processors.
 381  *
 382  * Revision 1.36.3.4  1995/11/13  20:45:10  bentson
 383  * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
 384  * in 1.3.41 kernel to remove a possible race condition, extend
 385  * some error messages, and let the driver run as a loadable module
 386  * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
 387  * possible race condition.
 388  * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
 389  *
 390  * Revision 1.36.3.3  1995/11/13  19:44:48  bentson
 391  * Changes by Linus Torvalds in 1.3.33 kernel distribution
 392  * required due to reordering of driver initialization.
 393  * Drivers are now initialized *after* memory management.
 394  *
 395  * Revision 1.36.3.2  1995/09/08  22:07:14  bentson
 396  * remove printk from ISR; fix typo
 397  *
 398  * Revision 1.36.3.1  1995/09/01  12:00:42  marcio
 399  * Minor fixes in the PCI board support. PCI function calls in
 400  * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
 401  * <duncan@okay.com>. "bad serial count" message removed.
 402  *
 403  * Revision 1.36.3  1995/08/22  09:19:42  marcio
 404  * Cyclom-Y/PCI support added. Changes in the cy_init routine and
 405  * board initialization. Changes in the boot messages. The driver
 406  * supports up to 4 boards and 64 ports by default.
 407  *
 408  * Revision 1.36.1.4  1995/03/29  06:14:14  bentson
 409  * disambiguate between Cyclom-16Y and Cyclom-32Ye;
 410  *
 411  * Revision 1.36.1.3  1995/03/23  22:15:35  bentson
 412  * add missing break in modem control block in ioctl switch statement
 413  * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
 414  *
 415  * Revision 1.36.1.2  1995/03/22  19:16:22  bentson
 416  * make sure CTS flow control is set as soon as possible (thanks
 417  * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
 418  *
 419  * Revision 1.36.1.1  1995/03/13  15:44:43  bentson
 420  * initialize defaults for receive threshold and stale data timeout;
 421  * cosmetic changes;
 422  *
 423  * Revision 1.36  1995/03/10  23:33:53  bentson
 424  * added support of chips 4-7 in 32 port Cyclom-Ye;
 425  * fix cy_interrupt pointer dereference problem
 426  * (Joe Portman <baron@aa.net>);
 427  * give better error response if open is attempted on non-existent port
 428  * (Zachariah Vaum <jchryslr@netcom.com>);
 429  * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
 430  * conditional compilation for -16Y on systems with fast, noisy bus;
 431  * comment out diagnostic print function;
 432  * cleaned up table of base addresses;
 433  * set receiver time-out period register to correct value,
 434  * set receive threshold to better default values,
 435  * set chip timer to more accurate 200 Hz ticking,
 436  * add code to monitor and modify receive parameters
 437  * (Rik Faith <faith@cs.unc.edu> Nick Simicich
 438  * <njs@scifi.emi.net>);
 439  *
 440  * Revision 1.35  1994/12/16  13:54:18  steffen
 441  * additional patch by Marcio Saito for board detection
 442  * Accidently left out in 1.34
 443  *
 444  * Revision 1.34  1994/12/10  12:37:12  steffen
 445  * This is the corrected version as suggested by Marcio Saito
 446  *
 447  * Revision 1.33  1994/12/01  22:41:18  bentson
 448  * add hooks to support more high speeds directly; add tytso
 449  * patch regarding CLOCAL wakeups
 450  *
 451  * Revision 1.32  1994/11/23  19:50:04  bentson
 452  * allow direct kernel control of higher signalling rates;
 453  * look for cards at additional locations
 454  *
 455  * Revision 1.31  1994/11/16  04:33:28  bentson
 456  * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
 457  * a problem in chars_in_buffer has been resolved by some
 458  * small changes;  this should yield smoother output
 459  *
 460  * Revision 1.30  1994/11/16  04:28:05  bentson
 461  * Fix from Corey Minyard, Internet: minyard@metronet.com,
 462  * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
 463  * cy_hangup that appears to clear up much (all?) of the
 464  * DTR glitches; also he's added/cleaned-up diagnostic messages
 465  *
 466  * Revision 1.29  1994/11/16  04:16:07  bentson
 467  * add change proposed by Ralph Sims, ralphs@halcyon.com, to
 468  * operate higher speeds in same way as other serial ports;
 469  * add more serial ports (for up to two 16-port muxes).
 470  *
 471  * Revision 1.28  1994/11/04  00:13:16  root
 472  * turn off diagnostic messages
 473  *
 474  * Revision 1.27  1994/11/03  23:46:37  root
 475  * bunch of changes to bring driver into greater conformance
 476  * with the serial.c driver (looking for missed fixes)
 477  *
 478  * Revision 1.26  1994/11/03  22:40:36  root
 479  * automatic interrupt probing fixed.
 480  *
 481  * Revision 1.25  1994/11/03  20:17:02  root
 482  * start to implement auto-irq
 483  *
 484  * Revision 1.24  1994/11/03  18:01:55  root
 485  * still working on modem signals--trying not to drop DTR
 486  * during the getty/login processes
 487  *
 488  * Revision 1.23  1994/11/03  17:51:36  root
 489  * extend baud rate support; set receive threshold as function
 490  * of baud rate; fix some problems with RTS/CTS;
 491  *
 492  * Revision 1.22  1994/11/02  18:05:35  root
 493  * changed arguments to udelay to type long to get
 494  * delays to be of correct duration
 495  *
 496  * Revision 1.21  1994/11/02  17:37:30  root
 497  * employ udelay (after calibrating loops_per_second earlier
 498  * in init/main.c) instead of using home-grown delay routines
 499  *
 500  * Revision 1.20  1994/11/02  03:11:38  root
 501  * cy_chars_in_buffer forces a return value of 0 to let
 502  * login work (don't know why it does); some functions
 503  * that were returning EFAULT, now executes the code;
 504  * more work on deciding when to disable xmit interrupts;
 505  *
 506  * Revision 1.19  1994/11/01  20:10:14  root
 507  * define routine to start transmission interrupts (by enabling
 508  * transmit interrupts); directly enable/disable modem interrupts;
 509  *
 510  * Revision 1.18  1994/11/01  18:40:45  bentson
 511  * Don't always enable transmit interrupts in startup; interrupt on
 512  * TxMpty instead of TxRdy to help characters get out before shutdown;
 513  * restructure xmit interrupt to check for chars first and quit if
 514  * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
 515  * (to my view);
 516  *
 517  * Revision 1.17  1994/10/30  04:39:45  bentson
 518  * rename serial_driver and callout_driver to cy_serial_driver and
 519  * cy_callout_driver to avoid linkage interference; initialize
 520  * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
 521  * from cyclades_port structure; add paranoia check to cy_close;
 522  *
 523  * Revision 1.16  1994/10/30  01:14:33  bentson
 524  * change major numbers; add some _early_ return statements;
 525  *
 526  * Revision 1.15  1994/10/29  06:43:15  bentson
 527  * final tidying up for clean compile;  enable some error reporting
 528  *
 529  * Revision 1.14  1994/10/28  20:30:22  Bentson
 530  * lots of changes to drag the driver towards the new tty_io
 531  * structures and operation.  not expected to work, but may
 532  * compile cleanly.
 533  *
 534  * Revision 1.13  1994/07/21  23:08:57  Bentson
 535  * add some diagnostic cruft; support 24 lines (for testing
 536  * both -8Y and -16Y cards; be more thorough in servicing all
 537  * chips during interrupt; add "volatile" a few places to
 538  * circumvent compiler optimizations; fix base & offset
 539  * computations in block_til_ready (was causing chip 0 to
 540  * stop operation)
 541  *
 542  * Revision 1.12  1994/07/19  16:42:11  Bentson
 543  * add some hackery for kernel version 1.1.8; expand
 544  * error messages; refine timing for delay loops and
 545  * declare loop params volatile
 546  *
 547  * Revision 1.11  1994/06/11  21:53:10  bentson
 548  * get use of save_car right in transmit interrupt service
 549  *
 550  * Revision 1.10.1.1  1994/06/11  21:31:18  bentson
 551  * add some diagnostic printing; try to fix save_car stuff
 552  *
 553  * Revision 1.10  1994/06/11  20:36:08  bentson
 554  * clean up compiler warnings
 555  *
 556  * Revision 1.9  1994/06/11  19:42:46  bentson
 557  * added a bunch of code to support modem signalling
 558  *
 559  * Revision 1.8  1994/06/11  17:57:07  bentson
 560  * recognize break & parity error
 561  *
 562  * Revision 1.7  1994/06/05  05:51:34  bentson
 563  * Reorder baud table to be monotonic; add cli to CP; discard
 564  * incoming characters and status if the line isn't open; start to
 565  * fold code into cy_throttle; start to port get_serial_info,
 566  * set_serial_info, get_modem_info, set_modem_info, and send_break
 567  * from serial.c; expand cy_ioctl; relocate and expand config_setup;
 568  * get flow control characters from tty struct; invalidate ports w/o
 569  * hardware;
 570  *
 571  * Revision 1.6  1994/05/31  18:42:21  bentson
 572  * add a loop-breaker in the interrupt service routine;
 573  * note when port is initialized so that it can be shut
 574  * down under the right conditions; receive works without
 575  * any obvious errors
 576  *
 577  * Revision 1.5  1994/05/30  00:55:02  bentson
 578  * transmit works without obvious errors
 579  *
 580  * Revision 1.4  1994/05/27  18:46:27  bentson
 581  * incorporated more code from lib_y.c; can now print short
 582  * strings under interrupt control to port zero; seems to
 583  * select ports/channels/lines correctly
 584  *
 585  * Revision 1.3  1994/05/25  22:12:44  bentson
 586  * shifting from multi-port on a card to proper multiplexor
 587  * data structures;  added skeletons of most routines
 588  *
 589  * Revision 1.2  1994/05/19  13:21:43  bentson
 590  * start to crib from other sources
 591  *
 592  */
 593
 594 #define CY_VERSION      "2.4"
 595
 596 /* If you need to install more boards than NR_CARDS, change the constant
 597    in the definition below. No other change is necessary to support up to
 598    eight boards. Beyond that you'll have to extend cy_isa_addresses. */
 599
 600 #define NR_CARDS        4
 601
 602 /*
 603    If the total number of ports is larger than NR_PORTS, change this
 604    constant in the definition below. No other change is necessary to
 605    support more boards/ports. */
 606
 607 #define NR_PORTS        256
 608
 609 #define ZE_V1_NPORTS    64
 610 #define ZO_V1   0
 611 #define ZO_V2   1
 612 #define ZE_V1   2
 613
 614 #define SERIAL_PARANOIA_CHECK
 615 #undef  CY_DEBUG_OPEN
 616 #undef  CY_DEBUG_THROTTLE
 617 #undef  CY_DEBUG_OTHER
 618 #undef  CY_DEBUG_IO
 619 #undef  CY_DEBUG_COUNT
 620 #undef  CY_DEBUG_DTR
 621 #undef  CY_DEBUG_WAIT_UNTIL_SENT
 622 #undef  CY_DEBUG_INTERRUPTS
 623 #undef  CY_16Y_HACK
 624 #undef  CY_ENABLE_MONITORING
 625 #undef  CY_PCI_DEBUG
 626
 627 #if 0
 628 #define PAUSE __asm__("nop")
 629 #else
 630 #define PAUSE do {} while (0)
 631 #endif
 632
 633 /*
 634  * Include section
 635  */
 636 #include <linux/module.h>
 637 #include <linux/errno.h>
 638 #include <linux/signal.h>
 639 #include <linux/sched.h>
 640 #include <linux/timer.h>
 641 #include <linux/interrupt.h>
 642 #include <linux/tty.h>
 643 #include <linux/tty_flip.h>
 644 #include <linux/serial.h>
 645 #include <linux/major.h>
 646 #include <linux/string.h>
 647 #include <linux/fcntl.h>
 648 #include <linux/ptrace.h>
 649 #include <linux/cyclades.h>
 650 #include <linux/mm.h>
 651 #include <linux/ioport.h>
 652 #include <linux/init.h>
 653 #include <linux/delay.h>
 654 #include <linux/spinlock.h>
 655 #include <linux/bitops.h>
 656
 657 #include <asm/system.h>
 658 #include <asm/io.h>
 659 #include <asm/irq.h>
 660 #include <asm/uaccess.h>
 661
 662 #define CY_LOCK(info,flags)                                     \
 663                 do {                                            \
 664                 spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
 665                 } while (0)
 666
 667 #define CY_UNLOCK(info,flags)                                   \
 668                 do {                                            \
 669                 spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
 670                 } while (0)
 671
 672 #include <linux/types.h>
 673 #include <linux/kernel.h>
 674 #include <linux/pci.h>
 675
 676 #include <linux/stat.h>
 677 #include <linux/proc_fs.h>
 678
 679 static void cy_throttle(struct tty_struct *tty);
 680 static void cy_send_xchar(struct tty_struct *tty, char ch);
 681
 682 #define IS_CYC_Z(card) ((card).num_chips == -1)
 683
 684 #define Z_FPGA_CHECK(card) \
 685         ((cy_readl(&((struct RUNTIME_9060 __iomem *) \
 686                 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
 687
 688 #define ISZLOADED(card) (((ZO_V1==cy_readl(&((struct RUNTIME_9060 __iomem *) \
 689                         ((card).ctl_addr))->mail_box_0)) || \
 690                         Z_FPGA_CHECK(card)) && \
 691                         (ZFIRM_ID==cy_readl(&((struct FIRM_ID __iomem *) \
 692                         ((card).base_addr+ID_ADDRESS))->signature)))
 693
 694 #ifndef SERIAL_XMIT_SIZE
 695 #define SERIAL_XMIT_SIZE        (min(PAGE_SIZE, 4096))
 696 #endif
 697 #define WAKEUP_CHARS            256
 698
 699 #define STD_COM_FLAGS (0)
 700
 701 static struct tty_driver *cy_serial_driver;
 702
 703 #ifdef CONFIG_ISA
 704 /* This is the address lookup table. The driver will probe for
 705    Cyclom-Y/ISA boards at all addresses in here. If you want the
 706    driver to probe addresses at a different address, add it to
 707    this table.  If the driver is probing some other board and
 708    causing problems, remove the offending address from this table.
 709    The cy_setup function extracts additional addresses from the
 710    boot options line.  The form is "cyclades=address,address..."
 711 */
 712
 713 static unsigned int cy_isa_addresses[] = {
 714         0xD0000,
 715         0xD2000,
 716         0xD4000,
 717         0xD6000,
 718         0xD8000,
 719         0xDA000,
 720         0xDC000,
 721         0xDE000,
 722         0, 0, 0, 0, 0, 0, 0, 0
 723 };
 724
 725 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
 726
 727 #ifdef MODULE
 728 static long maddr[NR_CARDS] = { 0, };
 729 static int irq[NR_CARDS] = { 0, };
 730
 731 module_param_array(maddr, long, NULL, 0);
 732 module_param_array(irq, int, NULL, 0);
 733 #endif
 734
 735 #endif                          /* CONFIG_ISA */
 736
 737 /* This is the per-card data structure containing address, irq, number of
 738    channels, etc. This driver supports a maximum of NR_CARDS cards.
 739 */
 740 static struct cyclades_card cy_card[NR_CARDS];
 741
 742 /* This is the per-channel data structure containing pointers, flags
 743  and variables for the port. This driver supports a maximum of NR_PORTS.
 744 */
 745 static struct cyclades_port cy_port[NR_PORTS];
 746
 747 static int cy_next_channel;     /* next minor available */
 748
 749 /*
 750  * This is used to look up the divisor speeds and the timeouts
 751  * We're normally limited to 15 distinct baud rates.  The extra
 752  * are accessed via settings in info->flags.
 753  *      0,     1,     2,     3,     4,     5,     6,     7,     8,     9,
 754  *     10,    11,    12,    13,    14,    15,    16,    17,    18,    19,
 755  *                                               HI            VHI
 756  *     20
 757  */
 758 static int baud_table[] = {
 759         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
 760         1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
 761         230400, 0
 762 };
 763
 764 static char baud_co_25[] = {    /* 25 MHz clock option table */
 765         /* value =>    00    01   02    03    04 */
 766         /* divide by    8    32   128   512  2048 */
 767         0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
 768         0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 769 };
 770
 771 static char baud_bpr_25[] = {   /* 25 MHz baud rate period table */
 772         0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
 773         0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
 774 };
 775
 776 static char baud_co_60[] = {    /* 60 MHz clock option table (CD1400 J) */
 777         /* value =>    00    01   02    03    04 */
 778         /* divide by    8    32   128   512  2048 */
 779         0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
 780         0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
 781         0x00
 782 };
 783
 784 static char baud_bpr_60[] = {   /* 60 MHz baud rate period table (CD1400 J) */
 785         0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
 786         0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
 787         0x21
 788 };
 789
 790 static char baud_cor3[] = {     /* receive threshold */
 791         0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
 792         0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
 793         0x07
 794 };
 795
 796 /*
 797  * The Cyclades driver implements HW flow control as any serial driver.
 798  * The cyclades_port structure member rflow and the vector rflow_thr
 799  * allows us to take advantage of a special feature in the CD1400 to avoid
 800  * data loss even when the system interrupt latency is too high. These flags
 801  * are to be used only with very special applications. Setting these flags
 802  * requires the use of a special cable (DTR and RTS reversed). In the new
 803  * CD1400-based boards (rev. 6.00 or later), there is no need for special
 804  * cables.
 805  */
 806
 807 static char rflow_thr[] = {     /* rflow threshold */
 808         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 809         0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
 810         0x0a
 811 };
 812
 813 /*  The Cyclom-Ye has placed the sequential chips in non-sequential
 814  *  address order.  This look-up table overcomes that problem.
 815  */
 816 static int cy_chip_offset[] = { 0x0000,
 817         0x0400,
 818         0x0800,
 819         0x0C00,
 820         0x0200,
 821         0x0600,
 822         0x0A00,
 823         0x0E00
 824 };
 825
 826 /* PCI related definitions */
 827
 828 static unsigned short cy_pci_nboard;
 829 static unsigned short cy_isa_nboard;
 830 static unsigned short cy_nboard;
 831 #ifdef CONFIG_PCI
 832 static unsigned short cy_pci_dev_id[] = {
 833         PCI_DEVICE_ID_CYCLOM_Y_Lo,      /* PCI < 1Mb */
 834         PCI_DEVICE_ID_CYCLOM_Y_Hi,      /* PCI > 1Mb */
 835         PCI_DEVICE_ID_CYCLOM_4Y_Lo,     /* 4Y PCI < 1Mb */
 836         PCI_DEVICE_ID_CYCLOM_4Y_Hi,     /* 4Y PCI > 1Mb */
 837         PCI_DEVICE_ID_CYCLOM_8Y_Lo,     /* 8Y PCI < 1Mb */
 838         PCI_DEVICE_ID_CYCLOM_8Y_Hi,     /* 8Y PCI > 1Mb */
 839         PCI_DEVICE_ID_CYCLOM_Z_Lo,      /* Z PCI < 1Mb */
 840         PCI_DEVICE_ID_CYCLOM_Z_Hi,      /* Z PCI > 1Mb */
 841         0                       /* end of table */
 842 };
 843 #endif
 844
 845 static void cy_start(struct tty_struct *);
 846 static void set_line_char(struct cyclades_port *);
 847 static int cyz_issue_cmd(struct cyclades_card *, uclong, ucchar, uclong);
 848 #ifdef CONFIG_ISA
 849 static unsigned detect_isa_irq(void __iomem *);
 850 #endif                          /* CONFIG_ISA */
 851
 852 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
 853
 854 #ifndef CONFIG_CYZ_INTR
 855 static void cyz_poll(unsigned long);
 856
 857 /* The Cyclades-Z polling cycle is defined by this variable */
 858 static long cyz_polling_cycle = CZ_DEF_POLL;
 859
 860 static int cyz_timeron = 0;
 861 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
 862
 863 #else                           /* CONFIG_CYZ_INTR */
 864 static void cyz_rx_restart(unsigned long);
 865 static struct timer_list cyz_rx_full_timer[NR_PORTS];
 866 #endif                          /* CONFIG_CYZ_INTR */
 867
 868 static inline int serial_paranoia_check(struct cyclades_port *info,
 869                 char *name, const char *routine)
 870 {
 871 #ifdef SERIAL_PARANOIA_CHECK
 872         if (!info) {
 873                 printk("cyc Warning: null cyclades_port for (%s) in %s\n",
 874                                 name, routine);
 875                 return 1;
 876         }
 877
 878         if ((long)info < (long)(&cy_port[0]) ||
 879                         (long)(&cy_port[NR_PORTS]) < (long)info) {
 880                 printk("cyc Warning: cyclades_port out of range for (%s) in "
 881                                 "%s\n", name, routine);
 882                 return 1;
 883         }
 884
 885         if (info->magic != CYCLADES_MAGIC) {
 886                 printk("cyc Warning: bad magic number for serial struct (%s) "
 887                                 "in %s\n", name, routine);
 888                 return 1;
 889         }
 890 #endif
 891         return 0;
 892 }                               /* serial_paranoia_check */
 893
 894 /*
 895  * This routine is used by the interrupt handler to schedule
 896  * processing in the software interrupt portion of the driver
 897  * (also known as the "bottom half").  This can be called any
 898  * number of times for any channel without harm.
 899  */
 900 static inline void cy_sched_event(struct cyclades_port *info, int event)
 901 {
 902         info->event |= 1 << event; /* remember what kind of event and who */
 903         schedule_work(&info->tqueue);
 904 }                               /* cy_sched_event */
 905
 906 /*
 907  * This routine is used to handle the "bottom half" processing for the
 908  * serial driver, known also the "software interrupt" processing.
 909  * This processing is done at the kernel interrupt level, after the
 910  * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON.  This
 911  * is where time-consuming activities which can not be done in the
 912  * interrupt driver proper are done; the interrupt driver schedules
 913  * them using cy_sched_event(), and they get done here.
 914  *
 915  * This is done through one level of indirection--the task queue.
 916  * When a hardware interrupt service routine wants service by the
 917  * driver's bottom half, it enqueues the appropriate tq_struct (one
 918  * per port) to the keventd work queue and sets a request flag
 919  * that the work queue be processed.
 920  *
 921  * Although this may seem unwieldy, it gives the system a way to
 922  * pass an argument (in this case the pointer to the cyclades_port
 923  * structure) to the bottom half of the driver.  Previous kernels
 924  * had to poll every port to see if that port needed servicing.
 925  */
 926 static void
 927 do_softint(struct work_struct *work)
 928 {
 929         struct cyclades_port *info =
 930                 container_of(work, struct cyclades_port, tqueue);
 931         struct tty_struct    *tty;
 932
 933         tty = info->tty;
 934         if (!tty)
 935                 return;
 936
 937         if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
 938                 tty_hangup(info->tty);
 939                 wake_up_interruptible(&info->open_wait);
 940                         info->flags &= ~ASYNC_NORMAL_ACTIVE;
 941         }
 942         if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
 943                 wake_up_interruptible(&info->open_wait);
 944 #ifdef CONFIG_CYZ_INTR
 945         if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
 946                 if (cyz_rx_full_timer[info->line].function == NULL) {
 947                         cyz_rx_full_timer[info->line].expires = jiffies + 1;
 948                         cyz_rx_full_timer[info->line].function = cyz_rx_restart;
 949                         cyz_rx_full_timer[info->line].data =
 950                                                 (unsigned long)info;
 951                         add_timer(&cyz_rx_full_timer[info->line]);
 952                 }
 953         }
 954 #endif
 955         if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
 956                 wake_up_interruptible(&info->delta_msr_wait);
 957         tty_wakeup(tty);
 958 #ifdef Z_WAKE
 959         if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
 960                 wake_up_interruptible(&info->shutdown_wait);
 961 #endif
 962 } /* do_softint */
 963
 964
 965 /***********************************************************/
 966 /********* Start of block of Cyclom-Y specific code ********/
 967
 968 /* This routine waits up to 1000 micro-seconds for the previous
 969    command to the Cirrus chip to complete and then issues the
 970    new command.  An error is returned if the previous command
 971    didn't finish within the time limit.
 972
 973    This function is only called from inside spinlock-protected code.
 974  */
 975 static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
 976 {
 977         volatile int i;
 978
 979         /* Check to see that the previous command has completed */
 980         for (i = 0; i < 100; i++) {
 981                 if (cy_readb(base_addr + (CyCCR << index)) == 0) {
 982                         break;
 983                 }
 984                 udelay(10L);
 985         }
 986         /* if the CCR never cleared, the previous command
 987            didn't finish within the "reasonable time" */
 988         if (i == 100)
 989                 return -1;
 990
 991         /* Issue the new command */
 992         cy_writeb(base_addr + (CyCCR << index), cmd);
 993
 994         return 0;
 995 }                               /* cyy_issue_cmd */
 996
 997 #ifdef CONFIG_ISA
 998 /* ISA interrupt detection code */
 999 static unsigned detect_isa_irq(void __iomem * address)
1000 {
1001         int irq;
1002         unsigned long irqs, flags;
1003         int save_xir, save_car;
1004         int index = 0;          /* IRQ probing is only for ISA */
1005
1006         /* forget possible initially masked and pending IRQ */
1007         irq = probe_irq_off(probe_irq_on());
1008
1009         /* Clear interrupts on the board first */
1010         cy_writeb(address + (Cy_ClrIntr << index), 0);
1011         /* Cy_ClrIntr is 0x1800 */
1012
1013         irqs = probe_irq_on();
1014         /* Wait ... */
1015         udelay(5000L);
1016
1017         /* Enable the Tx interrupts on the CD1400 */
1018         local_irq_save(flags);
1019         cy_writeb(address + (CyCAR << index), 0);
1020         cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1021
1022         cy_writeb(address + (CyCAR << index), 0);
1023         cy_writeb(address + (CySRER << index),
1024                   cy_readb(address + (CySRER << index)) | CyTxRdy);
1025         local_irq_restore(flags);
1026
1027         /* Wait ... */
1028         udelay(5000L);
1029
1030         /* Check which interrupt is in use */
1031         irq = probe_irq_off(irqs);
1032
1033         /* Clean up */
1034         save_xir = (u_char) cy_readb(address + (CyTIR << index));
1035         save_car = cy_readb(address + (CyCAR << index));
1036         cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1037         cy_writeb(address + (CySRER << index),
1038                   cy_readb(address + (CySRER << index)) & ~CyTxRdy);
1039         cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1040         cy_writeb(address + (CyCAR << index), (save_car));
1041         cy_writeb(address + (Cy_ClrIntr << index), 0);
1042         /* Cy_ClrIntr is 0x1800 */
1043
1044         return (irq > 0) ? irq : 0;
1045 }
1046 #endif                          /* CONFIG_ISA */
1047
1048 static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1049                         void __iomem * base_addr, int status, int index)
1050 {
1051         struct cyclades_port *info;
1052         struct tty_struct *tty;
1053         volatile int char_count;
1054         int i, j, len, mdm_change, mdm_status, outch;
1055         int save_xir, channel, save_car;
1056         char data;
1057
1058         if (status & CySRReceive) {     /* reception interrupt */
1059 #ifdef CY_DEBUG_INTERRUPTS
1060                 printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
1061 #endif
1062                 /* determine the channel & change to that context */
1063                 spin_lock(&cinfo->card_lock);
1064                 save_xir = (u_char) cy_readb(base_addr + (CyRIR << index));
1065                 channel = (u_short) (save_xir & CyIRChannel);
1066                 i = channel + chip * 4 + cinfo->first_line;
1067                 info = &cy_port[i];
1068                 info->last_active = jiffies;
1069                 save_car = cy_readb(base_addr + (CyCAR << index));
1070                 cy_writeb(base_addr + (CyCAR << index), save_xir);
1071
1072                 /* if there is nowhere to put the data, discard it */
1073                 if (info->tty == 0) {
1074                         j = (cy_readb(base_addr + (CyRIVR << index)) &
1075                                 CyIVRMask);
1076                         if (j == CyIVRRxEx) {   /* exception */
1077                                 data = cy_readb(base_addr + (CyRDSR << index));
1078                         } else {        /* normal character reception */
1079                                 char_count = cy_readb(base_addr +
1080                                                 (CyRDCR << index));
1081                                 while (char_count--) {
1082                                         data = cy_readb(base_addr +
1083                                                 (CyRDSR << index));
1084                                 }
1085                         }
1086                 } else {        /* there is an open port for this data */
1087                         tty = info->tty;
1088                         j = (cy_readb(base_addr + (CyRIVR << index)) &
1089                                         CyIVRMask);
1090                         if (j == CyIVRRxEx) {   /* exception */
1091                                 data = cy_readb(base_addr + (CyRDSR << index));
1092
1093                                 /* For statistics only */
1094                                 if (data & CyBREAK)
1095                                         info->icount.brk++;
1096                                 else if (data & CyFRAME)
1097                                         info->icount.frame++;
1098                                 else if (data & CyPARITY)
1099                                         info->icount.parity++;
1100                                 else if (data & CyOVERRUN)
1101                                         info->icount.overrun++;
1102
1103                                 if (data & info->ignore_status_mask) {
1104                                         info->icount.rx++;
1105                                         return;
1106                                 }
1107                                 if (tty_buffer_request_room(tty, 1)) {
1108                                         if (data & info->read_status_mask) {
1109                                                 if (data & CyBREAK) {
1110                                                         tty_insert_flip_char(
1111                                                                 tty,
1112                                                                 cy_readb(
1113                                                                 base_addr +
1114                                                                 (CyRDSR <<
1115                                                                         index)),
1116                                                                 TTY_BREAK);
1117                                                         info->icount.rx++;
1118                                                         if (info->flags &
1119                                                             ASYNC_SAK) {
1120                                                                 do_SAK(tty);
1121                                                         }
1122                                                 } else if (data & CyFRAME) {
1123                                                         tty_insert_flip_char(
1124                                                                 tty,
1125                                                                 cy_readb(
1126                                                                 base_addr +
1127                                                                 (CyRDSR <<
1128                                                                         index)),
1129                                                                 TTY_FRAME);
1130                                                         info->icount.rx++;
1131                                                         info->idle_stats.
1132                                                                 frame_errs++;
1133                                                 } else if (data & CyPARITY) {
1134                                                         /* Pieces of seven... */
1135                                                         tty_insert_flip_char(
1136                                                                 tty,
1137                                                                 cy_readb(
1138                                                                 base_addr +
1139                                                                 (CyRDSR <<
1140                                                                         index)),
1141                                                                 TTY_PARITY);
1142                                                         info->icount.rx++;
1143                                                         info->idle_stats.
1144                                                                 parity_errs++;
1145                                                 } else if (data & CyOVERRUN) {
1146                                                         tty_insert_flip_char(
1147                                                                 tty, 0,
1148                                                                 TTY_OVERRUN);
1149                                                         info->icount.rx++;
1150                                                 /* If the flip buffer itself is
1151                                                    overflowing, we still lose
1152                                                    the next incoming character.
1153                                                  */
1154                                                         tty_insert_flip_char(
1155                                                                 tty,
1156                                                                 cy_readb(
1157                                                                 base_addr +
1158                                                                 (CyRDSR <<
1159                                                                         index)),
1160                                                                 TTY_FRAME);
1161                                                         info->icount.rx++;
1162                                                         info->idle_stats.
1163                                                                 overruns++;
1164                                         /* These two conditions may imply */
1165                                         /* a normal read should be done. */
1166                                         /* }else if(data & CyTIMEOUT){ */
1167                                         /* }else if(data & CySPECHAR){ */
1168                                                 } else {
1169                                                         tty_insert_flip_char(
1170                                                                 tty, 0,
1171                                                                 TTY_NORMAL);
1172                                                         info->icount.rx++;
1173                                                 }
1174                                         } else {
1175                                                 tty_insert_flip_char(tty, 0,
1176                                                                 TTY_NORMAL);
1177                                                 info->icount.rx++;
1178                                         }
1179                                 } else {
1180                                         /* there was a software buffer
1181                                            overrun and nothing could be
1182                                            done about it!!! */
1183                                         info->icount.buf_overrun++;
1184                                         info->idle_stats.overruns++;
1185                                 }
1186                         } else {        /* normal character reception */
1187                                 /* load # chars available from the chip */
1188                                 char_count = cy_readb(base_addr +
1189                                                 (CyRDCR << index));
1190
1191 #ifdef CY_ENABLE_MONITORING
1192                                 ++info->mon.int_count;
1193                                 info->mon.char_count += char_count;
1194                                 if (char_count > info->mon.char_max)
1195                                         info->mon.char_max = char_count;
1196                                 info->mon.char_last = char_count;
1197 #endif
1198                                 len = tty_buffer_request_room(tty, char_count);
1199                                 while (len--) {
1200                                         data = cy_readb(base_addr +
1201                                                         (CyRDSR << index));
1202                                         tty_insert_flip_char(tty, data,
1203                                                         TTY_NORMAL);
1204                                         info->idle_stats.recv_bytes++;
1205                                         info->icount.rx++;
1206 #ifdef CY_16Y_HACK
1207                                         udelay(10L);
1208 #endif
1209                                 }
1210                                 info->idle_stats.recv_idle = jiffies;
1211                         }
1212                         tty_schedule_flip(tty);
1213                 }
1214                 /* end of service */
1215                 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1216                 cy_writeb(base_addr + (CyCAR << index), (save_car));
1217                 spin_unlock(&cinfo->card_lock);
1218         }
1219
1220         if (status & CySRTransmit) {    /* transmission interrupt */
1221                 /* Since we only get here when the transmit buffer
1222                    is empty, we know we can always stuff a dozen
1223                    characters. */
1224 #ifdef CY_DEBUG_INTERRUPTS
1225                 printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
1226 #endif
1227
1228                 /* determine the channel & change to that context */
1229                 spin_lock(&cinfo->card_lock);
1230                 save_xir = (u_char) cy_readb(base_addr + (CyTIR << index));
1231                 channel = (u_short) (save_xir & CyIRChannel);
1232                 i = channel + chip * 4 + cinfo->first_line;
1233                 save_car = cy_readb(base_addr + (CyCAR << index));
1234                 cy_writeb(base_addr + (CyCAR << index), save_xir);
1235
1236                 /* validate the port# (as configured and open) */
1237                 if ((i < 0) || (NR_PORTS <= i)) {
1238                         cy_writeb(base_addr + (CySRER << index),
1239                                   cy_readb(base_addr + (CySRER << index)) &
1240                                   ~CyTxRdy);
1241                         goto txend;
1242                 }
1243                 info = &cy_port[i];
1244                 info->last_active = jiffies;
1245                 if (info->tty == 0) {
1246                         cy_writeb(base_addr + (CySRER << index),
1247                                   cy_readb(base_addr + (CySRER << index)) &
1248                                   ~CyTxRdy);
1249                         goto txdone;
1250                 }
1251
1252                 /* load the on-chip space for outbound data */
1253                 char_count = info->xmit_fifo_size;
1254
1255                 if (info->x_char) {     /* send special char */
1256                         outch = info->x_char;
1257                         cy_writeb(base_addr + (CyTDR << index), outch);
1258                         char_count--;
1259                         info->icount.tx++;
1260                         info->x_char = 0;
1261                 }
1262
1263                 if (info->breakon || info->breakoff) {
1264                         if (info->breakon) {
1265                                 cy_writeb(base_addr + (CyTDR << index), 0);
1266                                 cy_writeb(base_addr + (CyTDR << index), 0x81);
1267                                 info->breakon = 0;
1268                                 char_count -= 2;
1269                         }
1270                         if (info->breakoff) {
1271                                 cy_writeb(base_addr + (CyTDR << index), 0);
1272                                 cy_writeb(base_addr + (CyTDR << index), 0x83);
1273                                 info->breakoff = 0;
1274                                 char_count -= 2;
1275                         }
1276                 }
1277
1278                 while (char_count-- > 0) {
1279                         if (!info->xmit_cnt) {
1280                                 if (cy_readb(base_addr + (CySRER << index)) &
1281                                                 CyTxMpty) {
1282                                         cy_writeb(base_addr + (CySRER << index),
1283                                                 cy_readb(base_addr +
1284                                                         (CySRER << index)) &
1285                                                 ~CyTxMpty);
1286                                 } else {
1287                                         cy_writeb(base_addr + (CySRER << index),
1288                                                 (cy_readb(base_addr +
1289                                                         (CySRER << index)) &
1290                                                 ~CyTxRdy) | CyTxMpty);
1291                                 }
1292                                 goto txdone;
1293                         }
1294                         if (info->xmit_buf == 0) {
1295                                 cy_writeb(base_addr + (CySRER << index),
1296                                         cy_readb(base_addr + (CySRER << index))&
1297                                         ~CyTxRdy);
1298                                 goto txdone;
1299                         }
1300                         if (info->tty->stopped || info->tty->hw_stopped) {
1301                                 cy_writeb(base_addr + (CySRER << index),
1302                                         cy_readb(base_addr + (CySRER << index))&
1303                                         ~CyTxRdy);
1304                                 goto txdone;
1305                         }
1306                         /* Because the Embedded Transmit Commands have
1307                            been enabled, we must check to see if the
1308                            escape character, NULL, is being sent.  If it
1309                            is, we must ensure that there is room for it
1310                            to be doubled in the output stream.  Therefore
1311                            we no longer advance the pointer when the
1312                            character is fetched, but rather wait until
1313                            after the check for a NULL output character.
1314                            This is necessary because there may not be
1315                            room for the two chars needed to send a NULL.)
1316                          */
1317                         outch = info->xmit_buf[info->xmit_tail];
1318                         if (outch) {
1319                                 info->xmit_cnt--;
1320                                 info->xmit_tail = (info->xmit_tail + 1) &
1321                                                 (SERIAL_XMIT_SIZE - 1);
1322                                 cy_writeb(base_addr + (CyTDR << index), outch);
1323                                 info->icount.tx++;
1324                         } else {
1325                                 if (char_count > 1) {
1326                                         info->xmit_cnt--;
1327                                         info->xmit_tail = (info->xmit_tail + 1)&
1328                                                 (SERIAL_XMIT_SIZE - 1);
1329                                         cy_writeb(base_addr + (CyTDR << index),
1330                                                 outch);
1331                                         cy_writeb(base_addr + (CyTDR << index),
1332                                                 0);
1333                                         info->icount.tx++;
1334                                         char_count--;
1335                                 } else {
1336                                 }
1337                         }
1338                 }
1339
1340 txdone:
1341                 if (info->xmit_cnt < WAKEUP_CHARS) {
1342                         cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1343                 }
1344 txend:
1345                 /* end of service */
1346                 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1347                 cy_writeb(base_addr + (CyCAR << index), (save_car));
1348                 spin_unlock(&cinfo->card_lock);
1349         }
1350
1351         if (status & CySRModem) {       /* modem interrupt */
1352
1353                 /* determine the channel & change to that context */
1354                 spin_lock(&cinfo->card_lock);
1355                 save_xir = (u_char) cy_readb(base_addr + (CyMIR << index));
1356                 channel = (u_short) (save_xir & CyIRChannel);
1357                 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1358                 info->last_active = jiffies;
1359                 save_car = cy_readb(base_addr + (CyCAR << index));
1360                 cy_writeb(base_addr + (CyCAR << index), save_xir);
1361
1362                 mdm_change = cy_readb(base_addr + (CyMISR << index));
1363                 mdm_status = cy_readb(base_addr + (CyMSVR1 << index));
1364
1365                 if (info->tty == 0) {   /* no place for data, ignore it */
1366                         ;
1367                 } else {
1368                         if (mdm_change & CyANY_DELTA) {
1369                                 /* For statistics only */
1370                                 if (mdm_change & CyDCD)
1371                                         info->icount.dcd++;
1372                                 if (mdm_change & CyCTS)
1373                                         info->icount.cts++;
1374                                 if (mdm_change & CyDSR)
1375                                         info->icount.dsr++;
1376                                 if (mdm_change & CyRI)
1377                                         info->icount.rng++;
1378
1379                                 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1380                         }
1381
1382                         if ((mdm_change & CyDCD) &&
1383                                         (info->flags & ASYNC_CHECK_CD)) {
1384                                 if (mdm_status & CyDCD) {
1385                                         cy_sched_event(info,
1386                                                         Cy_EVENT_OPEN_WAKEUP);
1387                                 } else {
1388                                         cy_sched_event(info, Cy_EVENT_HANGUP);
1389                                 }
1390                         }
1391                         if ((mdm_change & CyCTS) &&
1392                                         (info->flags & ASYNC_CTS_FLOW)) {
1393                                 if (info->tty->hw_stopped) {
1394                                         if (mdm_status & CyCTS) {
1395                                                 /* cy_start isn't used
1396                                                    because... !!! */
1397                                                 info->tty->hw_stopped = 0;
1398                                                 cy_writeb(base_addr +
1399                                                         (CySRER << index),
1400                                                         cy_readb(base_addr +
1401                                                                 (CySRER <<
1402                                                                         index))|
1403                                                         CyTxRdy);
1404                                                 cy_sched_event(info,
1405                                                         Cy_EVENT_WRITE_WAKEUP);
1406                                         }
1407                                 } else {
1408                                         if (!(mdm_status & CyCTS)) {
1409                                                 /* cy_stop isn't used
1410                                                    because ... !!! */
1411                                                 info->tty->hw_stopped = 1;
1412                                                 cy_writeb(base_addr +
1413                                                         (CySRER << index),
1414                                                         cy_readb(base_addr +
1415                                                                 (CySRER <<
1416                                                                 index)) &
1417                                                         ~CyTxRdy);
1418                                         }
1419                                 }
1420                         }
1421                         if (mdm_change & CyDSR) {
1422                         }
1423                         if (mdm_change & CyRI) {
1424                         }
1425                 }
1426                 /* end of service */
1427                 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1428                 cy_writeb(base_addr + (CyCAR << index), save_car);
1429                 spin_unlock(&cinfo->card_lock);
1430         }
1431 }
1432
1433 /* The real interrupt service routine is called
1434    whenever the card wants its hand held--chars
1435    received, out buffer empty, modem change, etc.
1436  */
1437 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1438 {
1439         int status;
1440         struct cyclades_card *cinfo;
1441         void __iomem *base_addr, *card_base_addr;
1442         int chip;
1443         int index;
1444         int too_many;
1445         int had_work;
1446
1447         if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1448 #ifdef CY_DEBUG_INTERRUPTS
1449                 printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
1450 #endif
1451                 return IRQ_NONE;        /* spurious interrupt */
1452         }
1453
1454         card_base_addr = cinfo->base_addr;
1455         index = cinfo->bus_index;
1456
1457         /* This loop checks all chips in the card.  Make a note whenever
1458            _any_ chip had some work to do, as this is considered an
1459            indication that there will be more to do.  Only when no chip
1460            has any work does this outermost loop exit.
1461          */
1462         do {
1463                 had_work = 0;
1464                 for (chip = 0; chip < cinfo->num_chips; chip++) {
1465                         base_addr = cinfo->base_addr +
1466                                         (cy_chip_offset[chip] << index);
1467                         too_many = 0;
1468                         while ((status = cy_readb(base_addr +
1469                                                 (CySVRR << index))) != 0x00) {
1470                                 had_work++;
1471                         /* The purpose of the following test is to ensure that
1472                            no chip can monopolize the driver.  This forces the
1473                            chips to be checked in a round-robin fashion (after
1474                            draining each of a bunch (1000) of characters).
1475                          */
1476                                 if (1000 < too_many++) {
1477                                         break;
1478                                 }
1479                                 cyy_intr_chip(cinfo, chip, base_addr, status,
1480                                                 index);
1481                         }
1482                 }
1483         } while (had_work);
1484
1485         /* clear interrupts */
1486         spin_lock(&cinfo->card_lock);
1487         cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1488         /* Cy_ClrIntr is 0x1800 */
1489         spin_unlock(&cinfo->card_lock);
1490         return IRQ_HANDLED;
1491 }                               /* cyy_interrupt */
1492
1493 /***********************************************************/
1494 /********* End of block of Cyclom-Y specific code **********/
1495 /******** Start of block of Cyclades-Z specific code *********/
1496 /***********************************************************/
1497
1498 static int
1499 cyz_fetch_msg(struct cyclades_card *cinfo,
1500                 uclong * channel, ucchar * cmd, uclong * param)
1501 {
1502         struct FIRM_ID __iomem *firm_id;
1503         struct ZFW_CTRL __iomem *zfw_ctrl;
1504         struct BOARD_CTRL __iomem *board_ctrl;
1505         unsigned long loc_doorbell;
1506
1507         firm_id = cinfo->base_addr + ID_ADDRESS;
1508         if (!ISZLOADED(*cinfo)) {
1509                 return -1;
1510         }
1511         zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1512                         0xfffff);
1513         board_ctrl = &zfw_ctrl->board_ctrl;
1514
1515         loc_doorbell = cy_readl(&((struct RUNTIME_9060 __iomem *)
1516                                   (cinfo->ctl_addr))->loc_doorbell);
1517         if (loc_doorbell) {
1518                 *cmd = (char)(0xff & loc_doorbell);
1519                 *channel = cy_readl(&board_ctrl->fwcmd_channel);
1520                 *param = (uclong) cy_readl(&board_ctrl->fwcmd_param);
1521                 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1522                           loc_doorbell, 0xffffffff);
1523                 return 1;
1524         }
1525         return 0;
1526 }                               /* cyz_fetch_msg */
1527
1528 static int
1529 cyz_issue_cmd(struct cyclades_card *cinfo,
1530                 uclong channel, ucchar cmd, uclong param)
1531 {
1532         struct FIRM_ID __iomem *firm_id;
1533         struct ZFW_CTRL __iomem *zfw_ctrl;
1534         struct BOARD_CTRL __iomem *board_ctrl;
1535         unsigned long __iomem *pci_doorbell;
1536         int index;
1537
1538         firm_id = cinfo->base_addr + ID_ADDRESS;
1539         if (!ISZLOADED(*cinfo)) {
1540                 return -1;
1541         }
1542         zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1543                         0xfffff);
1544         board_ctrl = &zfw_ctrl->board_ctrl;
1545
1546         index = 0;
1547         pci_doorbell =
1548             &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1549         while ((cy_readl(pci_doorbell) & 0xff) != 0) {
1550                 if (index++ == 1000) {
1551                         return (int)(cy_readl(pci_doorbell) & 0xff);
1552                 }
1553                 udelay(50L);
1554         }
1555         cy_writel(&board_ctrl->hcmd_channel, channel);
1556         cy_writel(&board_ctrl->hcmd_param, param);
1557         cy_writel(pci_doorbell, (long)cmd);
1558
1559         return 0;
1560 }                               /* cyz_issue_cmd */
1561
1562 static void
1563 cyz_handle_rx(struct cyclades_port *info,
1564                 volatile struct CH_CTRL __iomem * ch_ctrl,
1565                 volatile struct BUF_CTRL __iomem * buf_ctrl)
1566 {
1567         struct cyclades_card *cinfo = &cy_card[info->card];
1568         struct tty_struct *tty = info->tty;
1569         volatile int char_count;
1570         int len;
1571 #ifdef BLOCKMOVE
1572         int small_count;
1573 #else
1574         char data;
1575 #endif
1576         volatile uclong rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1577
1578         rx_get = new_rx_get = cy_readl(&buf_ctrl->rx_get);
1579         rx_put = cy_readl(&buf_ctrl->rx_put);
1580         rx_bufsize = cy_readl(&buf_ctrl->rx_bufsize);
1581         rx_bufaddr = cy_readl(&buf_ctrl->rx_bufaddr);
1582         if (rx_put >= rx_get)
1583                 char_count = rx_put - rx_get;
1584         else
1585                 char_count = rx_put - rx_get + rx_bufsize;
1586
1587         if (char_count) {
1588                 info->last_active = jiffies;
1589                 info->jiffies[1] = jiffies;
1590
1591 #ifdef CY_ENABLE_MONITORING
1592                 info->mon.int_count++;
1593                 info->mon.char_count += char_count;
1594                 if (char_count > info->mon.char_max)
1595                         info->mon.char_max = char_count;
1596                 info->mon.char_last = char_count;
1597 #endif
1598                 if (tty == 0) {
1599                         /* flush received characters */
1600                         new_rx_get = (new_rx_get + char_count) &
1601                                         (rx_bufsize - 1);
1602                         info->rflush_count++;
1603                 } else {
1604 #ifdef BLOCKMOVE
1605                 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1606                    for performance, but because of buffer boundaries, there
1607                    may be several steps to the operation */
1608                         while (0 < (small_count = min_t(unsigned int,
1609                                         rx_bufsize - new_rx_get,
1610                                         min_t(unsigned int, TTY_FLIPBUF_SIZE -
1611                                                 tty->flip.count, char_count)))){
1612                                 memcpy_fromio(tty->flip.char_buf_ptr,
1613                                         (char *)(cinfo->base_addr + rx_bufaddr +
1614                                                 new_rx_get),
1615                                         small_count);
1616
1617                                 tty->flip.char_buf_ptr += small_count;
1618                                 memset(tty->flip.flag_buf_ptr, TTY_NORMAL,
1619                                         small_count);
1620                                 tty->flip.flag_buf_ptr += small_count;
1621                                 new_rx_get = (new_rx_get + small_count) &
1622                                                 (rx_bufsize - 1);
1623                                 char_count -= small_count;
1624                                 info->icount.rx += small_count;
1625                                 info->idle_stats.recv_bytes += small_count;
1626                                 tty->flip.count += small_count;
1627                         }
1628 #else
1629                         len = tty_buffer_request_room(tty, char_count);
1630                         while (len--) {
1631                                 data = cy_readb(cinfo->base_addr + rx_bufaddr +
1632                                                 new_rx_get);
1633                                 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1634                                 tty_insert_flip_char(tty, data, TTY_NORMAL);
1635                                 info->idle_stats.recv_bytes++;
1636                                 info->icount.rx++;
1637                         }
1638 #endif
1639 #ifdef CONFIG_CYZ_INTR
1640                 /* Recalculate the number of chars in the RX buffer and issue
1641                    a cmd in case it's higher than the RX high water mark */
1642                         rx_put = cy_readl(&buf_ctrl->rx_put);
1643                         if (rx_put >= rx_get)
1644                                 char_count = rx_put - rx_get;
1645                         else
1646                                 char_count = rx_put - rx_get + rx_bufsize;
1647                         if (char_count >= cy_readl(&buf_ctrl->rx_threshold)) {
1648                                 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1649                         }
1650 #endif
1651                         info->idle_stats.recv_idle = jiffies;
1652                         tty_schedule_flip(tty);
1653                 }
1654                 /* Update rx_get */
1655                 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1656         }
1657 }
1658
1659 static void
1660 cyz_handle_tx(struct cyclades_port *info,
1661                 volatile struct CH_CTRL __iomem * ch_ctrl,
1662                 volatile struct BUF_CTRL __iomem * buf_ctrl)
1663 {
1664         struct cyclades_card *cinfo = &cy_card[info->card];
1665         struct tty_struct *tty = info->tty;
1666         char data;
1667         volatile int char_count;
1668 #ifdef BLOCKMOVE
1669         int small_count;
1670 #endif
1671         volatile uclong tx_put, tx_get, tx_bufsize, tx_bufaddr;
1672
1673         if (info->xmit_cnt <= 0)        /* Nothing to transmit */
1674                 return;
1675
1676         tx_get = cy_readl(&buf_ctrl->tx_get);
1677         tx_put = cy_readl(&buf_ctrl->tx_put);
1678         tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
1679         tx_bufaddr = cy_readl(&buf_ctrl->tx_bufaddr);
1680         if (tx_put >= tx_get)
1681                 char_count = tx_get - tx_put - 1 + tx_bufsize;
1682         else
1683                 char_count = tx_get - tx_put - 1;
1684
1685         if (char_count) {
1686
1687                 if (tty == 0) {
1688                         goto ztxdone;
1689                 }
1690
1691                 if (info->x_char) {     /* send special char */
1692                         data = info->x_char;
1693
1694                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1695                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1696                         info->x_char = 0;
1697                         char_count--;
1698                         info->icount.tx++;
1699                         info->last_active = jiffies;
1700                         info->jiffies[2] = jiffies;
1701                 }
1702 #ifdef BLOCKMOVE
1703                 while (0 < (small_count = min_t(unsigned int,
1704                                 tx_bufsize - tx_put, min_t(unsigned int,
1705                                         (SERIAL_XMIT_SIZE - info->xmit_tail),
1706                                         min_t(unsigned int, info->xmit_cnt,
1707                                                 char_count))))) {
1708
1709                         memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1710                                         tx_put),
1711                                         &info->xmit_buf[info->xmit_tail],
1712                                         small_count);
1713
1714                         tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1715                         char_count -= small_count;
1716                         info->icount.tx += small_count;
1717                         info->xmit_cnt -= small_count;
1718                         info->xmit_tail = (info->xmit_tail + small_count) &
1719                                         (SERIAL_XMIT_SIZE - 1);
1720                         info->last_active = jiffies;
1721                         info->jiffies[2] = jiffies;
1722                 }
1723 #else
1724                 while (info->xmit_cnt && char_count) {
1725                         data = info->xmit_buf[info->xmit_tail];
1726                         info->xmit_cnt--;
1727                         info->xmit_tail = (info->xmit_tail + 1) &
1728                                         (SERIAL_XMIT_SIZE - 1);
1729
1730                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1731                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1732                         char_count--;
1733                         info->icount.tx++;
1734                         info->last_active = jiffies;
1735                         info->jiffies[2] = jiffies;
1736                 }
1737 #endif
1738 ztxdone:
1739                 if (info->xmit_cnt < WAKEUP_CHARS) {
1740                         cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1741                 }
1742                 /* Update tx_put */
1743                 cy_writel(&buf_ctrl->tx_put, tx_put);
1744         }
1745 }
1746
1747 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1748 {
1749         struct tty_struct *tty;
1750         struct cyclades_port *info;
1751         static volatile struct FIRM_ID __iomem *firm_id;
1752         static volatile struct ZFW_CTRL __iomem *zfw_ctrl;
1753         static volatile struct BOARD_CTRL __iomem *board_ctrl;
1754         static volatile struct CH_CTRL __iomem *ch_ctrl;
1755         static volatile struct BUF_CTRL __iomem *buf_ctrl;
1756         uclong channel;
1757         ucchar cmd;
1758         uclong param;
1759         uclong hw_ver, fw_ver;
1760         int special_count;
1761         int delta_count;
1762
1763         firm_id = cinfo->base_addr + ID_ADDRESS;
1764         zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1765                         0xfffff);
1766         board_ctrl = &zfw_ctrl->board_ctrl;
1767         fw_ver = cy_readl(&board_ctrl->fw_version);
1768         hw_ver = cy_readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1769                         mail_box_0);
1770
1771         while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1772                 special_count = 0;
1773                 delta_count = 0;
1774                 info = &cy_port[channel + cinfo->first_line];
1775                 if ((tty = info->tty) == 0) {
1776                         continue;
1777                 }
1778                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1779                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1780
1781                 switch (cmd) {
1782                 case C_CM_PR_ERROR:
1783                         tty_insert_flip_char(tty, 0, TTY_PARITY);
1784                         info->icount.rx++;
1785                         special_count++;
1786                         break;
1787                 case C_CM_FR_ERROR:
1788                         tty_insert_flip_char(tty, 0, TTY_FRAME);
1789                         info->icount.rx++;
1790                         special_count++;
1791                         break;
1792                 case C_CM_RXBRK:
1793                         tty_insert_flip_char(tty, 0, TTY_BREAK);
1794                         info->icount.rx++;
1795                         special_count++;
1796                         break;
1797                 case C_CM_MDCD:
1798                         info->icount.dcd++;
1799                         delta_count++;
1800                         if (info->flags & ASYNC_CHECK_CD) {
1801                                 if ((fw_ver > 241 ? ((u_long) param) :
1802                                                 cy_readl(&ch_ctrl->rs_status)) &
1803                                                 C_RS_DCD) {
1804                                         cy_sched_event(info,
1805                                                         Cy_EVENT_OPEN_WAKEUP);
1806                                 } else {
1807                                         cy_sched_event(info, Cy_EVENT_HANGUP);
1808                                 }
1809                         }
1810                         break;
1811                 case C_CM_MCTS:
1812                         info->icount.cts++;
1813                         delta_count++;
1814                         break;
1815                 case C_CM_MRI:
1816                         info->icount.rng++;
1817                         delta_count++;
1818                         break;
1819                 case C_CM_MDSR:
1820                         info->icount.dsr++;
1821                         delta_count++;
1822                         break;
1823 #ifdef Z_WAKE
1824                 case C_CM_IOCTLW:
1825                         cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1826                         break;
1827 #endif
1828 #ifdef CONFIG_CYZ_INTR
1829                 case C_CM_RXHIWM:
1830                 case C_CM_RXNNDT:
1831                 case C_CM_INTBACK2:
1832                         /* Reception Interrupt */
1833 #ifdef CY_DEBUG_INTERRUPTS
1834                         printk("cyz_interrupt: rcvd intr, card %d, "
1835                                         "port %ld\n\r", info->card, channel);
1836 #endif
1837                         cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1838                         break;
1839                 case C_CM_TXBEMPTY:
1840                 case C_CM_TXLOWWM:
1841                 case C_CM_INTBACK:
1842                         /* Transmission Interrupt */
1843 #ifdef CY_DEBUG_INTERRUPTS
1844                         printk("cyz_interrupt: xmit intr, card %d, "
1845                                         "port %ld\n\r", info->card, channel);
1846 #endif
1847                         cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1848                         break;
1849 #endif                          /* CONFIG_CYZ_INTR */
1850                 case C_CM_FATAL:
1851                         /* should do something with this !!! */
1852                         break;
1853                 default:
1854                         break;
1855                 }
1856                 if (delta_count)
1857                         cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1858                 if (special_count)
1859                         tty_schedule_flip(tty);
1860         }
1861 }
1862
1863 #ifdef CONFIG_CYZ_INTR
1864 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1865 {
1866         struct cyclades_card *cinfo;
1867
1868         if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1869 #ifdef CY_DEBUG_INTERRUPTS
1870                 printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
1871 #endif
1872                 return IRQ_NONE;        /* spurious interrupt */
1873         }
1874
1875         if (!ISZLOADED(*cinfo)) {
1876 #ifdef CY_DEBUG_INTERRUPTS
1877                 printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
1878 #endif
1879                 return IRQ_NONE;
1880         }
1881
1882         /* Handle the interrupts */
1883         cyz_handle_cmd(cinfo);
1884
1885         return IRQ_HANDLED;
1886 }                               /* cyz_interrupt */
1887
1888 static void cyz_rx_restart(unsigned long arg)
1889 {
1890         struct cyclades_port *info = (struct cyclades_port *)arg;
1891         int retval;
1892         int card = info->card;
1893         uclong channel = (info->line) - (cy_card[card].first_line);
1894         unsigned long flags;
1895
1896         CY_LOCK(info, flags);
1897         retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
1898         if (retval != 0) {
1899                 printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1900                         info->line, retval);
1901         }
1902         cyz_rx_full_timer[info->line].function = NULL;
1903         CY_UNLOCK(info, flags);
1904 }
1905
1906 #else                           /* CONFIG_CYZ_INTR */
1907
1908 static void cyz_poll(unsigned long arg)
1909 {
1910         struct cyclades_card *cinfo;
1911         struct cyclades_port *info;
1912         struct tty_struct *tty;
1913         static volatile struct FIRM_ID *firm_id;
1914         static volatile struct ZFW_CTRL *zfw_ctrl;
1915         static volatile struct BOARD_CTRL *board_ctrl;
1916         static volatile struct CH_CTRL *ch_ctrl;
1917         static volatile struct BUF_CTRL *buf_ctrl;
1918         int card, port;
1919
1920         cyz_timerlist.expires = jiffies + (HZ);
1921         for (card = 0; card < NR_CARDS; card++) {
1922                 cinfo = &cy_card[card];
1923
1924                 if (!IS_CYC_Z(*cinfo))
1925                         continue;
1926                 if (!ISZLOADED(*cinfo))
1927                         continue;
1928
1929                 firm_id = cinfo->base_addr + ID_ADDRESS;
1930                 zfw_ctrl = cinfo->base_addr +
1931                                 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1932                 board_ctrl = &(zfw_ctrl->board_ctrl);
1933
1934         /* Skip first polling cycle to avoid racing conditions with the FW */
1935                 if (!cinfo->intr_enabled) {
1936                         cinfo->nports = (int)cy_readl(&board_ctrl->n_channel);
1937                         cinfo->intr_enabled = 1;
1938                         continue;
1939                 }
1940
1941                 cyz_handle_cmd(cinfo);
1942
1943                 for (port = 0; port < cinfo->nports; port++) {
1944                         info = &cy_port[port + cinfo->first_line];
1945                         tty = info->tty;
1946                         ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1947                         buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1948
1949                         if (!info->throttle)
1950                                 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1951                         cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1952                 }
1953                 /* poll every 'cyz_polling_cycle' period */
1954                 cyz_timerlist.expires = jiffies + cyz_polling_cycle;
1955         }
1956         add_timer(&cyz_timerlist);
1957 }                               /* cyz_poll */
1958
1959 #endif                          /* CONFIG_CYZ_INTR */
1960
1961 /********** End of block of Cyclades-Z specific code *********/
1962 /***********************************************************/
1963
1964 /* This is called whenever a port becomes active;
1965    interrupts are enabled and DTR & RTS are turned on.
1966  */
1967 static int startup(struct cyclades_port *info)
1968 {
1969         unsigned long flags;
1970         int retval = 0;
1971         void __iomem *base_addr;
1972         int card, chip, channel, index;
1973         unsigned long page;
1974
1975         card = info->card;
1976         channel = (info->line) - (cy_card[card].first_line);
1977
1978         page = get_zeroed_page(GFP_KERNEL);
1979         if (!page)
1980                 return -ENOMEM;
1981
1982         CY_LOCK(info, flags);
1983
1984         if (info->flags & ASYNC_INITIALIZED) {
1985                 free_page(page);
1986                 goto errout;
1987         }
1988
1989         if (!info->type) {
1990                 if (info->tty) {
1991                         set_bit(TTY_IO_ERROR, &info->tty->flags);
1992                 }
1993                 free_page(page);
1994                 goto errout;
1995         }
1996
1997         if (info->xmit_buf)
1998                 free_page(page);
1999         else
2000                 info->xmit_buf = (unsigned char *)page;
2001
2002         CY_UNLOCK(info, flags);
2003
2004         set_line_char(info);
2005
2006         if (!IS_CYC_Z(cy_card[card])) {
2007                 chip = channel >> 2;
2008                 channel &= 0x03;
2009                 index = cy_card[card].bus_index;
2010                 base_addr = cy_card[card].base_addr +
2011                                 (cy_chip_offset[chip] << index);
2012
2013 #ifdef CY_DEBUG_OPEN
2014                 printk("cyc startup card %d, chip %d, channel %d, "
2015                                 "base_addr %lx\n",
2016                                 card, chip, channel, (long)base_addr);
2017                 /**/
2018 #endif
2019                 CY_LOCK(info, flags);
2020
2021                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2022
2023                 cy_writeb(base_addr + (CyRTPR << index),
2024                         (info->default_timeout ? info->default_timeout : 0x02));
2025                 /* 10ms rx timeout */
2026
2027                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2028                                 index);
2029
2030                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2031                 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2032                 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
2033
2034 #ifdef CY_DEBUG_DTR
2035                 printk("cyc:startup raising DTR\n");
2036                 printk("     status: 0x%x, 0x%x\n",
2037                         cy_readb(base_addr + (CyMSVR1 << index)),
2038                         cy_readb(base_addr + (CyMSVR2 << index)));
2039 #endif
2040
2041                 cy_writeb(base_addr + (CySRER << index),
2042                         cy_readb(base_addr + (CySRER << index)) | CyRxData);
2043                 info->flags |= ASYNC_INITIALIZED;
2044
2045                 if (info->tty) {
2046                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
2047                 }
2048                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2049                 info->breakon = info->breakoff = 0;
2050                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2051                 info->idle_stats.in_use =
2052                 info->idle_stats.recv_idle =
2053                 info->idle_stats.xmit_idle = jiffies;
2054
2055                 CY_UNLOCK(info, flags);
2056
2057         } else {
2058                 struct FIRM_ID __iomem *firm_id;
2059                 struct ZFW_CTRL __iomem *zfw_ctrl;
2060                 struct BOARD_CTRL __iomem *board_ctrl;
2061                 struct CH_CTRL __iomem *ch_ctrl;
2062                 int retval;
2063
2064                 base_addr = cy_card[card].base_addr;
2065
2066                 firm_id = base_addr + ID_ADDRESS;
2067                 if (!ISZLOADED(cy_card[card])) {
2068                         return -ENODEV;
2069                 }
2070
2071                 zfw_ctrl = cy_card[card].base_addr +
2072                                 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2073                 board_ctrl = &zfw_ctrl->board_ctrl;
2074                 ch_ctrl = zfw_ctrl->ch_ctrl;
2075
2076 #ifdef CY_DEBUG_OPEN
2077                 printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
2078                         card, channel, (long)base_addr);
2079                 /**/
2080 #endif
2081                 CY_LOCK(info, flags);
2082
2083                 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2084 #ifdef Z_WAKE
2085 #ifdef CONFIG_CYZ_INTR
2086                 cy_writel(&ch_ctrl[channel].intr_enable,
2087                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2088                           C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
2089 #else
2090                 cy_writel(&ch_ctrl[channel].intr_enable,
2091                           C_IN_IOCTLW | C_IN_MDCD);
2092 #endif                          /* CONFIG_CYZ_INTR */
2093 #else
2094 #ifdef CONFIG_CYZ_INTR
2095                 cy_writel(&ch_ctrl[channel].intr_enable,
2096                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2097                           C_IN_RXNNDT | C_IN_MDCD);
2098 #else
2099                 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2100 #endif                          /* CONFIG_CYZ_INTR */
2101 #endif                          /* Z_WAKE */
2102
2103                 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
2104                 if (retval != 0) {
2105                         printk("cyc:startup(1) retval on ttyC%d was %x\n",
2106                                 info->line, retval);
2107                 }
2108
2109                 /* Flush RX buffers before raising DTR and RTS */
2110                 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX,
2111                                 0L);
2112                 if (retval != 0) {
2113                         printk("cyc:startup(2) retval on ttyC%d was %x\n",
2114                                 info->line, retval);
2115                 }
2116
2117                 /* set timeout !!! */
2118                 /* set RTS and DTR !!! */
2119                 cy_writel(&ch_ctrl[channel].rs_control,
2120                         cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2121                         C_RS_DTR);
2122                 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2123                                 C_CM_IOCTLM, 0L);
2124                 if (retval != 0) {
2125                         printk("cyc:startup(3) retval on ttyC%d was %x\n",
2126                                 info->line, retval);
2127                 }
2128 #ifdef CY_DEBUG_DTR
2129                 printk("cyc:startup raising Z DTR\n");
2130 #endif
2131
2132                 /* enable send, recv, modem !!! */
2133
2134                 info->flags |= ASYNC_INITIALIZED;
2135                 if (info->tty) {
2136                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
2137                 }
2138                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2139                 info->breakon = info->breakoff = 0;
2140                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2141                 info->idle_stats.in_use =
2142                 info->idle_stats.recv_idle =
2143                 info->idle_stats.xmit_idle = jiffies;
2144
2145                 CY_UNLOCK(info, flags);
2146         }
2147
2148 #ifdef CY_DEBUG_OPEN
2149         printk(" cyc startup done\n");
2150 #endif
2151         return 0;
2152
2153 errout:
2154         CY_UNLOCK(info, flags);
2155         return retval;
2156 }                               /* startup */
2157
2158 static void start_xmit(struct cyclades_port *info)
2159 {
2160         unsigned long flags;
2161         void __iomem *base_addr;
2162         int card, chip, channel, index;
2163
2164         card = info->card;
2165         channel = (info->line) - (cy_card[card].first_line);
2166         if (!IS_CYC_Z(cy_card[card])) {
2167                 chip = channel >> 2;
2168                 channel &= 0x03;
2169                 index = cy_card[card].bus_index;
2170                 base_addr = cy_card[card].base_addr +
2171                                 (cy_chip_offset[chip] << index);
2172
2173                 CY_LOCK(info, flags);
2174                 cy_writeb(base_addr + (CyCAR << index), channel);
2175                 cy_writeb(base_addr + (CySRER << index),
2176                         cy_readb(base_addr + (CySRER << index)) | CyTxRdy);
2177                 CY_UNLOCK(info, flags);
2178         } else {
2179 #ifdef CONFIG_CYZ_INTR
2180                 int retval;
2181
2182                 CY_LOCK(info, flags);
2183                 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK,
2184                                 0L);
2185                 if (retval != 0) {
2186                         printk("cyc:start_xmit retval on ttyC%d was %x\n",
2187                                 info->line, retval);
2188                 }
2189                 CY_UNLOCK(info, flags);
2190 #else                           /* CONFIG_CYZ_INTR */
2191                 /* Don't have to do anything at this time */
2192 #endif                          /* CONFIG_CYZ_INTR */
2193         }
2194 }                               /* start_xmit */
2195
2196 /*
2197  * This routine shuts down a serial port; interrupts are disabled,
2198  * and DTR is dropped if the hangup on close termio flag is on.
2199  */
2200 static void shutdown(struct cyclades_port *info)
2201 {
2202         unsigned long flags;
2203         void __iomem *base_addr;
2204         int card, chip, channel, index;
2205
2206         if (!(info->flags & ASYNC_INITIALIZED)) {
2207                 return;
2208         }
2209
2210         card = info->card;
2211         channel = info->line - cy_card[card].first_line;
2212         if (!IS_CYC_Z(cy_card[card])) {
2213                 chip = channel >> 2;
2214                 channel &= 0x03;
2215                 index = cy_card[card].bus_index;
2216                 base_addr = cy_card[card].base_addr +
2217                                 (cy_chip_offset[chip] << index);
2218
2219 #ifdef CY_DEBUG_OPEN
2220                 printk("cyc shutdown Y card %d, chip %d, channel %d, "
2221                                 "base_addr %lx\n",
2222                                 card, chip, channel, (long)base_addr);
2223 #endif
2224
2225                 CY_LOCK(info, flags);
2226
2227                 /* Clear delta_msr_wait queue to avoid mem leaks. */
2228                 wake_up_interruptible(&info->delta_msr_wait);
2229
2230                 if (info->xmit_buf) {
2231                         unsigned char *temp;
2232                         temp = info->xmit_buf;
2233                         info->xmit_buf = NULL;
2234                         free_page((unsigned long)temp);
2235                 }
2236                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2237                 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2238                         cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2239                         cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2240 #ifdef CY_DEBUG_DTR
2241                         printk("cyc shutdown dropping DTR\n");
2242                         printk("     status: 0x%x, 0x%x\n",
2243                                 cy_readb(base_addr + (CyMSVR1 << index)),
2244                                 cy_readb(base_addr + (CyMSVR2 << index)));
2245 #endif
2246                 }
2247                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2248                 /* it may be appropriate to clear _XMIT at
2249                    some later date (after testing)!!! */
2250
2251                 if (info->tty) {
2252                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2253                 }
2254                 info->flags &= ~ASYNC_INITIALIZED;
2255                 CY_UNLOCK(info, flags);
2256         } else {
2257                 struct FIRM_ID __iomem *firm_id;
2258                 struct ZFW_CTRL __iomem *zfw_ctrl;
2259                 struct BOARD_CTRL __iomem *board_ctrl;
2260                 struct CH_CTRL __iomem *ch_ctrl;
2261                 int retval;
2262
2263                 base_addr = cy_card[card].base_addr;
2264 #ifdef CY_DEBUG_OPEN
2265                 printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
2266                         card, channel, (long)base_addr);
2267 #endif
2268
2269                 firm_id = base_addr + ID_ADDRESS;
2270                 if (!ISZLOADED(cy_card[card])) {
2271                         return;
2272                 }
2273
2274                 zfw_ctrl = cy_card[card].base_addr +
2275                                 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2276                 board_ctrl = &zfw_ctrl->board_ctrl;
2277                 ch_ctrl = zfw_ctrl->ch_ctrl;
2278
2279                 CY_LOCK(info, flags);
2280
2281                 if (info->xmit_buf) {
2282                         unsigned char *temp;
2283                         temp = info->xmit_buf;
2284                         info->xmit_buf = NULL;
2285                         free_page((unsigned long)temp);
2286                 }
2287
2288                 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2289                         cy_writel(&ch_ctrl[channel].rs_control,
2290                                 (uclong)(cy_readl(&ch_ctrl[channel].rs_control)&
2291                                         ~(C_RS_RTS | C_RS_DTR)));
2292                         retval = cyz_issue_cmd(&cy_card[info->card], channel,
2293                                         C_CM_IOCTLM, 0L);
2294                         if (retval != 0) {
2295                                 printk("cyc:shutdown retval on ttyC%d was %x\n",
2296                                         info->line, retval);
2297                         }
2298 #ifdef CY_DEBUG_DTR
2299                         printk("cyc:shutdown dropping Z DTR\n");
2300 #endif
2301                 }
2302
2303                 if (info->tty) {
2304                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2305                 }
2306                 info->flags &= ~ASYNC_INITIALIZED;
2307
2308                 CY_UNLOCK(info, flags);
2309         }
2310
2311 #ifdef CY_DEBUG_OPEN
2312         printk(" cyc shutdown done\n");
2313 #endif
2314 }                               /* shutdown */
2315
2316 /*
2317  * ------------------------------------------------------------
2318  * cy_open() and friends
2319  * ------------------------------------------------------------
2320  */
2321
2322 static int
2323 block_til_ready(struct tty_struct *tty, struct file *filp,
2324                 struct cyclades_port *info)
2325 {
2326         DECLARE_WAITQUEUE(wait, current);
2327         struct cyclades_card *cinfo;
2328         unsigned long flags;
2329         int chip, channel, index;
2330         int retval;
2331         void __iomem *base_addr;
2332
2333         cinfo = &cy_card[info->card];
2334         channel = info->line - cinfo->first_line;
2335
2336         /*
2337          * If the device is in the middle of being closed, then block
2338          * until it's done, and then try again.
2339          */
2340         if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2341                 if (info->flags & ASYNC_CLOSING) {
2342                         interruptible_sleep_on(&info->close_wait);
2343                 }
2344                 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2345         }
2346
2347         /*
2348          * If non-blocking mode is set, then make the check up front
2349          * and then exit.
2350          */
2351         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2352                 info->flags |= ASYNC_NORMAL_ACTIVE;
2353                 return 0;
2354         }
2355
2356         /*
2357          * Block waiting for the carrier detect and the line to become
2358          * free (i.e., not in use by the callout).  While we are in
2359          * this loop, info->count is dropped by one, so that
2360          * cy_close() knows when to free things.  We restore it upon
2361          * exit, either normal or abnormal.
2362          */
2363         retval = 0;
2364         add_wait_queue(&info->open_wait, &wait);
2365 #ifdef CY_DEBUG_OPEN
2366         printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
2367                 info->line, info->count);
2368         /**/
2369 #endif
2370         CY_LOCK(info, flags);
2371         if (!tty_hung_up_p(filp))
2372                 info->count--;
2373         CY_UNLOCK(info, flags);
2374 #ifdef CY_DEBUG_COUNT
2375         printk("cyc block_til_ready: (%d): decrementing count to %d\n",
2376                 current->pid, info->count);
2377 #endif
2378         info->blocked_open++;
2379
2380         if (!IS_CYC_Z(*cinfo)) {
2381                 chip = channel >> 2;
2382                 channel &= 0x03;
2383                 index = cinfo->bus_index;
2384                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2385
2386                 while (1) {
2387                         CY_LOCK(info, flags);
2388                         if ((tty->termios->c_cflag & CBAUD)) {
2389                                 cy_writeb(base_addr + (CyCAR << index),
2390                                           (u_char) channel);
2391                                 cy_writeb(base_addr + (CyMSVR1 << index),
2392                                           CyRTS);
2393                                 cy_writeb(base_addr + (CyMSVR2 << index),
2394                                           CyDTR);
2395 #ifdef CY_DEBUG_DTR
2396                                 printk("cyc:block_til_ready raising DTR\n");
2397                                 printk("     status: 0x%x, 0x%x\n",
2398                                         cy_readb(base_addr +
2399                                                 (CyMSVR1 << index)),
2400                                         cy_readb(base_addr +
2401                                                 (CyMSVR2 << index)));
2402 #endif
2403                         }
2404                         CY_UNLOCK(info, flags);
2405
2406                         set_current_state(TASK_INTERRUPTIBLE);
2407                         if (tty_hung_up_p(filp) ||
2408                                         !(info->flags & ASYNC_INITIALIZED)) {
2409                                 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2410                                           -EAGAIN : -ERESTARTSYS);
2411                                 break;
2412                         }
2413
2414                         CY_LOCK(info, flags);
2415                         cy_writeb(base_addr + (CyCAR << index),
2416                                   (u_char) channel);
2417                         if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2418                                         (cy_readb(base_addr +
2419                                                 (CyMSVR1 << index)) & CyDCD))) {
2420                                 CY_UNLOCK(info, flags);
2421                                 break;
2422                         }
2423                         CY_UNLOCK(info, flags);
2424
2425                         if (signal_pending(current)) {
2426                                 retval = -ERESTARTSYS;
2427                                 break;
2428                         }
2429 #ifdef CY_DEBUG_OPEN
2430                         printk("cyc block_til_ready blocking: ttyC%d, "
2431                                         "count = %d\n",
2432                                         info->line, info->count);
2433                         /**/
2434 #endif
2435                         schedule();
2436                 }
2437         } else {
2438                 struct FIRM_ID __iomem *firm_id;
2439                 struct ZFW_CTRL __iomem *zfw_ctrl;
2440                 struct BOARD_CTRL __iomem *board_ctrl;
2441                 struct CH_CTRL __iomem *ch_ctrl;
2442                 int retval;
2443
2444                 base_addr = cinfo->base_addr;
2445                 firm_id = base_addr + ID_ADDRESS;
2446                 if (!ISZLOADED(*cinfo)) {
2447                         current->state = TASK_RUNNING;
2448                         remove_wait_queue(&info->open_wait, &wait);
2449                         return -EINVAL;
2450                 }
2451
2452                 zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
2453                                 0xfffff);
2454                 board_ctrl = &zfw_ctrl->board_ctrl;
2455                 ch_ctrl = zfw_ctrl->ch_ctrl;
2456
2457                 while (1) {
2458                         if ((tty->termios->c_cflag & CBAUD)) {
2459                                 cy_writel(&ch_ctrl[channel].rs_control,
2460                                           cy_readl(&ch_ctrl[channel].
2461                                                    rs_control) | (C_RS_RTS |
2462                                                                   C_RS_DTR));
2463                                 retval = cyz_issue_cmd(&cy_card[info->card],
2464                                                 channel, C_CM_IOCTLM, 0L);
2465                                 if (retval != 0) {
2466                                         printk("cyc:block_til_ready retval on "
2467                                                 "ttyC%d was %x\n",
2468                                                 info->line, retval);
2469                                 }
2470 #ifdef CY_DEBUG_DTR
2471                                 printk("cyc:block_til_ready raising Z DTR\n");
2472 #endif
2473                         }
2474
2475                         set_current_state(TASK_INTERRUPTIBLE);
2476                         if (tty_hung_up_p(filp) ||
2477                                         !(info->flags & ASYNC_INITIALIZED)) {
2478                                 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2479                                           -EAGAIN : -ERESTARTSYS);
2480                                 break;
2481                         }
2482                         if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2483                                         (cy_readl(&ch_ctrl[channel].rs_status) &
2484                                                 C_RS_DCD))) {
2485                                 break;
2486                         }
2487                         if (signal_pending(current)) {
2488                                 retval = -ERESTARTSYS;
2489                                 break;
2490                         }
2491 #ifdef CY_DEBUG_OPEN
2492                         printk("cyc block_til_ready blocking: ttyC%d, "
2493                                         "count = %d\n",
2494                                         info->line, info->count);
2495                         /**/
2496 #endif
2497                         schedule();
2498                 }
2499         }
2500         current->state = TASK_RUNNING;
2501         remove_wait_queue(&info->open_wait, &wait);
2502         if (!tty_hung_up_p(filp)) {
2503                 info->count++;
2504 #ifdef CY_DEBUG_COUNT
2505                 printk("cyc:block_til_ready (%d): incrementing count to %d\n",
2506                         current->pid, info->count);
2507 #endif
2508         }
2509         info->blocked_open--;
2510 #ifdef CY_DEBUG_OPEN
2511         printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
2512                 info->line, info->count);
2513         /**/
2514 #endif
2515         if (retval)
2516                 return retval;
2517         info->flags |= ASYNC_NORMAL_ACTIVE;
2518         return 0;
2519 }                               /* block_til_ready */
2520
2521 /*
2522  * This routine is called whenever a serial port is opened.  It
2523  * performs the serial-specific initialization for the tty structure.
2524  */
2525 static int cy_open(struct tty_struct *tty, struct file *filp)
2526 {
2527         struct cyclades_port *info;
2528         int retval, line;
2529
2530         line = tty->index;
2531         if ((line < 0) || (NR_PORTS <= line)) {
2532                 return -ENODEV;
2533         }
2534         info = &cy_port[line];
2535         if (info->line < 0) {
2536                 return -ENODEV;
2537         }
2538
2539         /* If the card's firmware hasn't been loaded,
2540            treat it as absent from the system.  This
2541            will make the user pay attention.
2542          */
2543         if (IS_CYC_Z(cy_card[info->card])) {
2544                 struct cyclades_card *cinfo = &cy_card[info->card];
2545                 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2546
2547                 if (!ISZLOADED(*cinfo)) {
2548                         if (((ZE_V1 == cy_readl(
2549                                         &((struct RUNTIME_9060 __iomem *)
2550                                          (cinfo->ctl_addr))->mail_box_0)) &&
2551                                         Z_FPGA_CHECK(*cinfo)) &&
2552                                         (ZFIRM_HLT == cy_readl(
2553                                                 &firm_id->signature))) {
2554                                 printk("cyc:Cyclades-Z Error: you need an "
2555                                         "external power supply for this number "
2556                                         "of ports.\n\rFirmware halted.\r\n");
2557                         } else {
2558                                 printk("cyc:Cyclades-Z firmware not yet "
2559                                         "loaded\n");
2560                         }
2561                         return -ENODEV;
2562                 }
2563 #ifdef CONFIG_CYZ_INTR
2564                 else {
2565                 /* In case this Z board is operating in interrupt mode, its
2566                    interrupts should be enabled as soon as the first open
2567                    happens to one of its ports. */
2568                         if (!cinfo->intr_enabled) {
2569                                 struct ZFW_CTRL __iomem *zfw_ctrl;
2570                                 struct BOARD_CTRL __iomem *board_ctrl;
2571
2572                                 zfw_ctrl = cinfo->base_addr +
2573                                         (cy_readl(&firm_id->zfwctrl_addr) &
2574                                                 0xfffff);
2575
2576                                 board_ctrl = &zfw_ctrl->board_ctrl;
2577
2578                                 /* Enable interrupts on the PLX chip */
2579                                 cy_writew(cinfo->ctl_addr + 0x68,
2580                                           cy_readw(cinfo->ctl_addr +
2581                                                    0x68) | 0x0900);
2582                                 /* Enable interrupts on the FW */
2583                                 retval = cyz_issue_cmd(cinfo, 0,
2584                                                 C_CM_IRQ_ENBL, 0L);
2585                                 if (retval != 0) {
2586                                         printk("cyc:IRQ enable retval was %x\n",
2587                                                 retval);
2588                                 }
2589                                 cinfo->nports =
2590                                         (int)cy_readl(&board_ctrl->n_channel);
2591                                 cinfo->intr_enabled = 1;
2592                         }
2593                 }
2594 #endif                          /* CONFIG_CYZ_INTR */
2595                 /* Make sure this Z port really exists in hardware */
2596                 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2597                         return -ENODEV;
2598         }
2599 #ifdef CY_DEBUG_OTHER
2600         printk("cyc:cy_open ttyC%d\n", info->line);     /* */
2601 #endif
2602         tty->driver_data = info;
2603         info->tty = tty;
2604         if (serial_paranoia_check(info, tty->name, "cy_open")) {
2605                 return -ENODEV;
2606         }
2607 #ifdef CY_DEBUG_OPEN
2608         printk("cyc:cy_open ttyC%d, count = %d\n", info->line, info->count);
2609         /**/
2610 #endif
2611         info->count++;
2612 #ifdef CY_DEBUG_COUNT
2613         printk("cyc:cy_open (%d): incrementing count to %d\n",
2614                 current->pid, info->count);
2615 #endif
2616
2617         /*
2618          * If the port is the middle of closing, bail out now
2619          */
2620         if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2621                 if (info->flags & ASYNC_CLOSING)
2622                         interruptible_sleep_on(&info->close_wait);
2623                 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2624         }
2625
2626         /*
2627          * Start up serial port
2628          */
2629         retval = startup(info);
2630         if (retval) {
2631                 return retval;
2632         }
2633
2634         retval = block_til_ready(tty, filp, info);
2635         if (retval) {
2636 #ifdef CY_DEBUG_OPEN
2637                 printk("cyc:cy_open returning after block_til_ready with %d\n",
2638                         retval);
2639 #endif
2640                 return retval;
2641         }
2642
2643         info->throttle = 0;
2644
2645 #ifdef CY_DEBUG_OPEN
2646         printk(" cyc:cy_open done\n");
2647         /**/
2648 #endif
2649         return 0;
2650 }                               /* cy_open */
2651
2652 /*
2653  * cy_wait_until_sent() --- wait until the transmitter is empty
2654  */
2655 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2656 {
2657         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2658         void __iomem *base_addr;
2659         int card, chip, channel, index;
2660         unsigned long orig_jiffies;
2661         int char_time;
2662
2663         if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2664                 return;
2665
2666         if (info->xmit_fifo_size == 0)
2667                 return;         /* Just in case.... */
2668
2669         orig_jiffies = jiffies;
2670         /*
2671          * Set the check interval to be 1/5 of the estimated time to
2672          * send a single character, and make it at least 1.  The check
2673          * interval should also be less than the timeout.
2674          *
2675          * Note: we have to use pretty tight timings here to satisfy
2676          * the NIST-PCTS.
2677          */
2678         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2679         char_time = char_time / 5;
2680         if (char_time <= 0)
2681                 char_time = 1;
2682         if (timeout < 0)
2683                 timeout = 0;
2684         if (timeout)
2685                 char_time = min(char_time, timeout);
2686         /*
2687          * If the transmitter hasn't cleared in twice the approximate
2688          * amount of time to send the entire FIFO, it probably won't
2689          * ever clear.  This assumes the UART isn't doing flow
2690          * control, which is currently the case.  Hence, if it ever
2691          * takes longer than info->timeout, this is probably due to a
2692          * UART bug of some kind.  So, we clamp the timeout parameter at
2693          * 2*info->timeout.
2694          */
2695         if (!timeout || timeout > 2 * info->timeout)
2696                 timeout = 2 * info->timeout;
2697 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2698         printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
2699         printk("jiff=%lu...", jiffies);
2700 #endif
2701         card = info->card;
2702         channel = (info->line) - (cy_card[card].first_line);
2703         if (!IS_CYC_Z(cy_card[card])) {
2704                 chip = channel >> 2;
2705                 channel &= 0x03;
2706                 index = cy_card[card].bus_index;
2707                 base_addr =
2708                     cy_card[card].base_addr + (cy_chip_offset[chip] << index);
2709                 while (cy_readb(base_addr + (CySRER << index)) & CyTxRdy) {
2710 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2711                         printk("Not clean (jiff=%lu)...", jiffies);
2712 #endif
2713                         if (msleep_interruptible(jiffies_to_msecs(char_time)))
2714                                 break;
2715                         if (timeout && time_after(jiffies, orig_jiffies +
2716                                         timeout))
2717                                 break;
2718                 }
2719         } else {
2720                 /* Nothing to do! */
2721         }
2722         /* Run one more char cycle */
2723         msleep_interruptible(jiffies_to_msecs(char_time * 5));
2724 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2725         printk("Clean (jiff=%lu)...done\n", jiffies);
2726 #endif
2727 }
2728
2729 /*
2730  * This routine is called when a particular tty device is closed.
2731  */
2732 static void cy_close(struct tty_struct *tty, struct file *filp)
2733 {
2734         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2735         unsigned long flags;
2736
2737 #ifdef CY_DEBUG_OTHER
2738         printk("cyc:cy_close ttyC%d\n", info->line);
2739 #endif
2740
2741         if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2742                 return;
2743         }
2744
2745         CY_LOCK(info, flags);
2746         /* If the TTY is being hung up, nothing to do */
2747         if (tty_hung_up_p(filp)) {
2748                 CY_UNLOCK(info, flags);
2749                 return;
2750         }
2751 #ifdef CY_DEBUG_OPEN
2752         printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
2753 #endif
2754         if ((tty->count == 1) && (info->count != 1)) {
2755                 /*
2756                  * Uh, oh.  tty->count is 1, which means that the tty
2757                  * structure will be freed.  Info->count should always
2758                  * be one in these conditions.  If it's greater than
2759                  * one, we've got real problems, since it means the
2760                  * serial port won't be shutdown.
2761                  */
2762                 printk("cyc:cy_close: bad serial port count; tty->count is 1, "
2763                         "info->count is %d\n", info->count);
2764                 info->count = 1;
2765         }
2766 #ifdef CY_DEBUG_COUNT
2767         printk("cyc:cy_close at (%d): decrementing count to %d\n",
2768                 current->pid, info->count - 1);
2769 #endif
2770         if (--info->count < 0) {
2771 #ifdef CY_DEBUG_COUNT
2772                 printk("cyc:cyc_close setting count to 0\n");
2773 #endif
2774                 info->count = 0;
2775         }
2776         if (info->count) {
2777                 CY_UNLOCK(info, flags);
2778                 return;
2779         }
2780         info->flags |= ASYNC_CLOSING;
2781
2782         /*
2783          * Now we wait for the transmit buffer to clear; and we notify
2784          * the line discipline to only process XON/XOFF characters.
2785          */
2786         tty->closing = 1;
2787         CY_UNLOCK(info, flags);
2788         if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2789                 tty_wait_until_sent(tty, info->closing_wait);
2790         }
2791         CY_LOCK(info, flags);
2792
2793         if (!IS_CYC_Z(cy_card[info->card])) {
2794                 int channel = info->line - cy_card[info->card].first_line;
2795                 int index = cy_card[info->card].bus_index;
2796                 void __iomem *base_addr = cy_card[info->card].base_addr +
2797                         (cy_chip_offset[channel >> 2] << index);
2798                 /* Stop accepting input */
2799                 channel &= 0x03;
2800                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2801                 cy_writeb(base_addr + (CySRER << index),
2802                           cy_readb(base_addr + (CySRER << index)) & ~CyRxData);
2803                 if (info->flags & ASYNC_INITIALIZED) {
2804                         /* Waiting for on-board buffers to be empty before closing
2805                            the port */
2806                         CY_UNLOCK(info, flags);
2807                         cy_wait_until_sent(tty, info->timeout);
2808                         CY_LOCK(info, flags);
2809                 }
2810         } else {
2811 #ifdef Z_WAKE
2812                 /* Waiting for on-board buffers to be empty before closing the port */
2813                 void __iomem *base_addr = cy_card[info->card].base_addr;
2814                 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2815                 struct ZFW_CTRL __iomem *zfw_ctrl =
2816                     base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2817                 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2818                 int channel = info->line - cy_card[info->card].first_line;
2819                 int retval;
2820
2821                 if (cy_readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2822                         retval = cyz_issue_cmd(&cy_card[info->card], channel,
2823                                                 C_CM_IOCTLW, 0L);
2824                         if (retval != 0) {
2825                                 printk("cyc:cy_close retval on ttyC%d was %x\n",
2826                                         info->line, retval);
2827                         }
2828                         CY_UNLOCK(info, flags);
2829                         interruptible_sleep_on(&info->shutdown_wait);
2830                         CY_LOCK(info, flags);
2831                 }
2832 #endif
2833         }
2834
2835         CY_UNLOCK(info, flags);
2836         shutdown(info);
2837         if (tty->driver->flush_buffer)
2838                 tty->driver->flush_buffer(tty);
2839         tty_ldisc_flush(tty);
2840         CY_LOCK(info, flags);
2841
2842         tty->closing = 0;
2843         info->event = 0;
2844         info->tty = NULL;
2845         if (info->blocked_open) {
2846                 CY_UNLOCK(info, flags);
2847                 if (info->close_delay) {
2848                         msleep_interruptible(jiffies_to_msecs
2849                                                 (info->close_delay));
2850                 }
2851                 wake_up_interruptible(&info->open_wait);
2852                 CY_LOCK(info, flags);
2853         }
2854         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2855         wake_up_interruptible(&info->close_wait);
2856
2857 #ifdef CY_DEBUG_OTHER
2858         printk(" cyc:cy_close done\n");
2859 #endif
2860
2861         CY_UNLOCK(info, flags);
2862 }                               /* cy_close */
2863
2864 /* This routine gets called when tty_write has put something into
2865  * the write_queue.  The characters may come from user space or
2866  * kernel space.
2867  *
2868  * This routine will return the number of characters actually
2869  * accepted for writing.
2870  *
2871  * If the port is not already transmitting stuff, start it off by
2872  * enabling interrupts.  The interrupt service routine will then
2873  * ensure that the characters are sent.
2874  * If the port is already active, there is no need to kick it.
2875  *
2876  */
2877 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2878 {
2879         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2880         unsigned long flags;
2881         int c, ret = 0;
2882
2883 #ifdef CY_DEBUG_IO
2884         printk("cyc:cy_write ttyC%d\n", info->line);    /* */
2885 #endif
2886
2887         if (serial_paranoia_check(info, tty->name, "cy_write")) {
2888                 return 0;
2889         }
2890
2891         if (!info->xmit_buf)
2892                 return 0;
2893
2894         CY_LOCK(info, flags);
2895         while (1) {
2896                 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2897                                    (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2898
2899                 if (c <= 0)
2900                         break;
2901
2902                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2903                 info->xmit_head = (info->xmit_head + c) &
2904                         (SERIAL_XMIT_SIZE - 1);
2905                 info->xmit_cnt += c;
2906                 buf += c;
2907                 count -= c;
2908                 ret += c;
2909         }
2910         CY_UNLOCK(info, flags);
2911
2912         info->idle_stats.xmit_bytes += ret;
2913         info->idle_stats.xmit_idle = jiffies;
2914
2915         if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2916                 start_xmit(info);
2917         }
2918         return ret;
2919 }                               /* cy_write */
2920
2921 /*
2922  * This routine is called by the kernel to write a single
2923  * character to the tty device.  If the kernel uses this routine,
2924  * it must call the flush_chars() routine (if defined) when it is
2925  * done stuffing characters into the driver.  If there is no room
2926  * in the queue, the character is ignored.
2927  */
2928 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2929 {
2930         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2931         unsigned long flags;
2932
2933 #ifdef CY_DEBUG_IO
2934         printk("cyc:cy_put_char ttyC%d\n", info->line);
2935 #endif
2936
2937         if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2938                 return;
2939
2940         if (!info->xmit_buf)
2941                 return;
2942
2943         CY_LOCK(info, flags);
2944         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
2945                 CY_UNLOCK(info, flags);
2946                 return;
2947         }
2948
2949         info->xmit_buf[info->xmit_head++] = ch;
2950         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2951         info->xmit_cnt++;
2952         info->idle_stats.xmit_bytes++;
2953         info->idle_stats.xmit_idle = jiffies;
2954         CY_UNLOCK(info, flags);
2955 }                               /* cy_put_char */
2956
2957 /*
2958  * This routine is called by the kernel after it has written a
2959  * series of characters to the tty device using put_char().
2960  */
2961 static void cy_flush_chars(struct tty_struct *tty)
2962 {
2963         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2964
2965 #ifdef CY_DEBUG_IO
2966         printk("cyc:cy_flush_chars ttyC%d\n", info->line);      /* */
2967 #endif
2968
2969         if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2970                 return;
2971
2972         if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2973                         !info->xmit_buf)
2974                 return;
2975
2976         start_xmit(info);
2977 }                               /* cy_flush_chars */
2978
2979 /*
2980  * This routine returns the numbers of characters the tty driver
2981  * will accept for queuing to be written.  This number is subject
2982  * to change as output buffers get emptied, or if the output flow
2983  * control is activated.
2984  */
2985 static int cy_write_room(struct tty_struct *tty)
2986 {
2987         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2988         int ret;
2989
2990 #ifdef CY_DEBUG_IO
2991         printk("cyc:cy_write_room ttyC%d\n", info->line);       /* */
2992 #endif
2993
2994         if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2995                 return 0;
2996         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2997         if (ret < 0)
2998                 ret = 0;
2999         return ret;
3000 }                               /* cy_write_room */
3001
3002 static int cy_chars_in_buffer(struct tty_struct *tty)
3003 {
3004         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3005         int card, channel;
3006
3007         if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
3008                 return 0;
3009
3010         card = info->card;
3011         channel = (info->line) - (cy_card[card].first_line);
3012
3013 #ifdef Z_EXT_CHARS_IN_BUFFER
3014         if (!IS_CYC_Z(cy_card[card])) {
3015 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
3016 #ifdef CY_DEBUG_IO
3017                 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt);       /* */
3018 #endif
3019                 return info->xmit_cnt;
3020 #ifdef Z_EXT_CHARS_IN_BUFFER
3021         } else {
3022                 static volatile struct FIRM_ID *firm_id;
3023                 static volatile struct ZFW_CTRL *zfw_ctrl;
3024                 static volatile struct CH_CTRL *ch_ctrl;
3025                 static volatile struct BUF_CTRL *buf_ctrl;
3026                 int char_count;
3027                 volatile uclong tx_put, tx_get, tx_bufsize;
3028
3029                 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3030                 zfw_ctrl = cy_card[card].base_addr +
3031                         (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3032                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3033                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3034
3035                 tx_get = cy_readl(&buf_ctrl->tx_get);
3036                 tx_put = cy_readl(&buf_ctrl->tx_put);
3037                 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
3038                 if (tx_put >= tx_get)
3039                         char_count = tx_put - tx_get;
3040                 else
3041                         char_count = tx_put - tx_get + tx_bufsize;
3042 #ifdef CY_DEBUG_IO
3043                 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count);  /* */
3044 #endif
3045                 return info->xmit_cnt + char_count;
3046         }
3047 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
3048 }                               /* cy_chars_in_buffer */
3049
3050 /*
3051  * ------------------------------------------------------------
3052  * cy_ioctl() and friends
3053  * ------------------------------------------------------------
3054  */
3055
3056 static void cyy_baud_calc(struct cyclades_port *info, uclong baud)
3057 {
3058         int co, co_val, bpr;
3059         uclong cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3060                         25000000);
3061
3062         if (baud == 0) {
3063                 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3064                 return;
3065         }
3066
3067         /* determine which prescaler to use */
3068         for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3069                 if (cy_clock / co_val / baud > 63)
3070                         break;
3071         }
3072
3073         bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3074         if (bpr > 255)
3075                 bpr = 255;
3076
3077         info->tbpr = info->rbpr = bpr;
3078         info->tco = info->rco = co;
3079 }
3080
3081 /*
3082  * This routine finds or computes the various line characteristics.
3083  * It used to be called config_setup
3084  */
3085 static void set_line_char(struct cyclades_port *info)
3086 {
3087         unsigned long flags;
3088         void __iomem *base_addr;
3089         int card, chip, channel, index;
3090         unsigned cflag, iflag;
3091         unsigned short chip_number;
3092         int baud, baud_rate = 0;
3093         int i;
3094
3095         if (!info->tty || !info->tty->termios) {
3096                 return;
3097         }
3098         if (info->line == -1) {
3099                 return;
3100         }
3101         cflag = info->tty->termios->c_cflag;
3102         iflag = info->tty->termios->c_iflag;
3103
3104         /*
3105          * Set up the tty->alt_speed kludge
3106          */
3107         if (info->tty) {
3108                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3109                         info->tty->alt_speed = 57600;
3110                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3111                         info->tty->alt_speed = 115200;
3112                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3113                         info->tty->alt_speed = 230400;
3114                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3115                         info->tty->alt_speed = 460800;
3116         }
3117
3118         card = info->card;
3119         channel = (info->line) - (cy_card[card].first_line);
3120         chip_number = channel / 4;
3121
3122         if (!IS_CYC_Z(cy_card[card])) {
3123
3124                 index = cy_card[card].bus_index;
3125
3126                 /* baud rate */
3127                 baud = tty_get_baud_rate(info->tty);
3128                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3129                                 ASYNC_SPD_CUST) {
3130                         if (info->custom_divisor)
3131                                 baud_rate = info->baud / info->custom_divisor;
3132                         else
3133                                 baud_rate = info->baud;
3134                 } else if (baud > CD1400_MAX_SPEED) {
3135                         baud = CD1400_MAX_SPEED;
3136                 }
3137                 /* find the baud index */
3138                 for (i = 0; i < 20; i++) {
3139                         if (baud == baud_table[i]) {
3140                                 break;
3141                         }
3142                 }
3143                 if (i == 20) {
3144                         i = 19; /* CD1400_MAX_SPEED */
3145                 }
3146
3147                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3148                                 ASYNC_SPD_CUST) {
3149                         cyy_baud_calc(info, baud_rate);
3150                 } else {
3151                         if (info->chip_rev >= CD1400_REV_J) {
3152                                 /* It is a CD1400 rev. J or later */
3153                                 info->tbpr = baud_bpr_60[i];    /* Tx BPR */
3154                                 info->tco = baud_co_60[i];      /* Tx CO */
3155                                 info->rbpr = baud_bpr_60[i];    /* Rx BPR */
3156                                 info->rco = baud_co_60[i];      /* Rx CO */
3157                         } else {
3158                                 info->tbpr = baud_bpr_25[i];    /* Tx BPR */
3159                                 info->tco = baud_co_25[i];      /* Tx CO */
3160                                 info->rbpr = baud_bpr_25[i];    /* Rx BPR */
3161                                 info->rco = baud_co_25[i];      /* Rx CO */
3162                         }
3163                 }
3164                 if (baud_table[i] == 134) {
3165                         /* get it right for 134.5 baud */
3166                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3167                                         2;
3168                 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3169                                 ASYNC_SPD_CUST) {
3170                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3171                                         baud_rate) + 2;
3172                 } else if (baud_table[i]) {
3173                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3174                                         baud_table[i]) + 2;
3175                         /* this needs to be propagated into the card info */
3176                 } else {
3177                         info->timeout = 0;
3178                 }
3179                 /* By tradition (is it a standard?) a baud rate of zero
3180                    implies the line should be/has been closed.  A bit
3181                    later in this routine such a test is performed. */
3182
3183                 /* byte size and parity */
3184                 info->cor5 = 0;
3185                 info->cor4 = 0;
3186                 /* receive threshold */
3187                 info->cor3 = (info->default_threshold ?
3188                                 info->default_threshold : baud_cor3[i]);
3189                 info->cor2 = CyETC;
3190                 switch (cflag & CSIZE) {
3191                 case CS5:
3192                         info->cor1 = Cy_5_BITS;
3193                         break;
3194                 case CS6:
3195                         info->cor1 = Cy_6_BITS;
3196                         break;
3197                 case CS7:
3198                         info->cor1 = Cy_7_BITS;
3199                         break;
3200                 case CS8:
3201                         info->cor1 = Cy_8_BITS;
3202                         break;
3203                 }
3204                 if (cflag & CSTOPB) {
3205                         info->cor1 |= Cy_2_STOP;
3206                 }
3207                 if (cflag & PARENB) {
3208                         if (cflag & PARODD) {
3209                                 info->cor1 |= CyPARITY_O;
3210                         } else {
3211                                 info->cor1 |= CyPARITY_E;
3212                         }
3213                 } else {
3214                         info->cor1 |= CyPARITY_NONE;
3215                 }
3216
3217                 /* CTS flow control flag */
3218                 if (cflag & CRTSCTS) {
3219                         info->flags |= ASYNC_CTS_FLOW;
3220                         info->cor2 |= CyCtsAE;
3221                 } else {
3222                         info->flags &= ~ASYNC_CTS_FLOW;
3223                         info->cor2 &= ~CyCtsAE;
3224                 }
3225                 if (cflag & CLOCAL)
3226                         info->flags &= ~ASYNC_CHECK_CD;
3227                 else
3228                         info->flags |= ASYNC_CHECK_CD;
3229
3230          /***********************************************
3231             The hardware option, CyRtsAO, presents RTS when
3232             the chip has characters to send.  Since most modems
3233             use RTS as reverse (inbound) flow control, this
3234             option is not used.  If inbound flow control is
3235             necessary, DTR can be programmed to provide the
3236             appropriate signals for use with a non-standard
3237             cable.  Contact Marcio Saito for details.
3238          ***********************************************/
3239
3240                 chip = channel >> 2;
3241                 channel &= 0x03;
3242                 base_addr = cy_card[card].base_addr +
3243                         (cy_chip_offset[chip] << index);
3244
3245                 CY_LOCK(info, flags);
3246                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3247
3248                 /* tx and rx baud rate */
3249
3250                 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3251                 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3252                 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3253                 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3254
3255                 /* set line characteristics  according configuration */
3256
3257                 cy_writeb(base_addr + (CySCHR1 << index),
3258                           START_CHAR(info->tty));
3259                 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3260                 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3261                 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3262                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3263                 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3264                 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3265
3266                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3267                                 CyCOR3ch, index);
3268
3269                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);      /* !!! Is this needed? */
3270                 cy_writeb(base_addr + (CyRTPR << index),
3271                         (info->default_timeout ? info->default_timeout : 0x02));
3272                 /* 10ms rx timeout */
3273
3274                 if (C_CLOCAL(info->tty)) {
3275                         /* without modem intr */
3276                         cy_writeb(base_addr + (CySRER << index),
3277                                   cy_readb(base_addr +
3278                                            (CySRER << index)) | CyMdmCh);
3279                         /* act on 1->0 modem transitions */
3280                         if ((cflag & CRTSCTS) && info->rflow) {
3281                                 cy_writeb(base_addr + (CyMCOR1 << index),
3282                                           (CyCTS | rflow_thr[i]));
3283                         } else {
3284                                 cy_writeb(base_addr + (CyMCOR1 << index),
3285                                           CyCTS);
3286                         }
3287                         /* act on 0->1 modem transitions */
3288                         cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3289                 } else {
3290                         /* without modem intr */
3291                         cy_writeb(base_addr + (CySRER << index),
3292                                   cy_readb(base_addr +
3293                                            (CySRER << index)) | CyMdmCh);
3294                         /* act on 1->0 modem transitions */
3295                         if ((cflag & CRTSCTS) && info->rflow) {
3296                                 cy_writeb(base_addr + (CyMCOR1 << index),
3297                                           (CyDSR | CyCTS | CyRI | CyDCD |
3298                                            rflow_thr[i]));
3299                         } else {
3300                                 cy_writeb(base_addr + (CyMCOR1 << index),
3301                                           CyDSR | CyCTS | CyRI | CyDCD);
3302                         }
3303                         /* act on 0->1 modem transitions */
3304                         cy_writeb(base_addr + (CyMCOR2 << index),
3305                                   CyDSR | CyCTS | CyRI | CyDCD);
3306                 }
3307
3308                 if (i == 0) {   /* baud rate is zero, turn off line */
3309                         if (info->rtsdtr_inv) {
3310                                 cy_writeb(base_addr + (CyMSVR1 << index),
3311                                           ~CyRTS);
3312                         } else {
3313                                 cy_writeb(base_addr + (CyMSVR2 << index),
3314                                           ~CyDTR);
3315                         }
3316 #ifdef CY_DEBUG_DTR
3317                         printk("cyc:set_line_char dropping DTR\n");
3318                         printk("     status: 0x%x, 0x%x\n",
3319                                 cy_readb(base_addr + (CyMSVR1 << index)),
3320                                 cy_readb(base_addr + (CyMSVR2 << index)));
3321 #endif
3322                 } else {
3323                         if (info->rtsdtr_inv) {
3324                                 cy_writeb(base_addr + (CyMSVR1 << index),
3325                                           CyRTS);
3326                         } else {
3327                                 cy_writeb(base_addr + (CyMSVR2 << index),
3328                                           CyDTR);
3329                         }
3330 #ifdef CY_DEBUG_DTR
3331                         printk("cyc:set_line_char raising DTR\n");
3332                         printk("     status: 0x%x, 0x%x\n",
3333                                 cy_readb(base_addr + (CyMSVR1 << index)),
3334                                 cy_readb(base_addr + (CyMSVR2 << index)));
3335 #endif
3336                 }
3337
3338                 if (info->tty) {
3339                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
3340                 }
3341                 CY_UNLOCK(info, flags);
3342
3343         } else {
3344                 struct FIRM_ID __iomem *firm_id;
3345                 struct ZFW_CTRL __iomem *zfw_ctrl;
3346                 struct BOARD_CTRL __iomem *board_ctrl;
3347                 struct CH_CTRL __iomem *ch_ctrl;
3348                 struct BUF_CTRL __iomem *buf_ctrl;
3349                 uclong sw_flow;
3350                 int retval;
3351
3352                 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3353                 if (!ISZLOADED(cy_card[card])) {
3354                         return;
3355                 }
3356
3357                 zfw_ctrl = cy_card[card].base_addr +
3358                         (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3359                 board_ctrl = &zfw_ctrl->board_ctrl;
3360                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3361                 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3362
3363                 /* baud rate */
3364                 baud = tty_get_baud_rate(info->tty);
3365                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3366                                 ASYNC_SPD_CUST) {
3367                         if (info->custom_divisor)
3368                                 baud_rate = info->baud / info->custom_divisor;
3369                         else
3370                                 baud_rate = info->baud;
3371                 } else if (baud > CYZ_MAX_SPEED) {
3372                         baud = CYZ_MAX_SPEED;
3373                 }
3374                 cy_writel(&ch_ctrl->comm_baud, baud);
3375
3376                 if (baud == 134) {
3377                         /* get it right for 134.5 baud */
3378                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3379                                         2;
3380                 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3381                                 ASYNC_SPD_CUST) {
3382                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3383                                         baud_rate) + 2;
3384                 } else if (baud) {
3385                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3386                                         baud) + 2;
3387                         /* this needs to be propagated into the card info */
3388                 } else {
3389                         info->timeout = 0;
3390                 }
3391
3392                 /* byte size and parity */
3393                 switch (cflag & CSIZE) {
3394                 case CS5:
3395                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3396                         break;
3397                 case CS6:
3398                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3399                         break;
3400                 case CS7:
3401                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3402                         break;
3403                 case CS8:
3404                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3405                         break;
3406                 }
3407                 if (cflag & CSTOPB) {
3408                         cy_writel(&ch_ctrl->comm_data_l,
3409                                   cy_readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3410                 } else {
3411                         cy_writel(&ch_ctrl->comm_data_l,
3412                                   cy_readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3413                 }
3414                 if (cflag & PARENB) {
3415                         if (cflag & PARODD) {
3416                                 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3417                         } else {
3418                                 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3419                         }
3420                 } else {
3421                         cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3422                 }
3423
3424                 /* CTS flow control flag */
3425                 if (cflag & CRTSCTS) {
3426                         cy_writel(&ch_ctrl->hw_flow,
3427                                   cy_readl(&ch_ctrl->
3428                                            hw_flow) | C_RS_CTS | C_RS_RTS);
3429                 } else {
3430                         cy_writel(&ch_ctrl->hw_flow,
3431                                   cy_readl(&ch_ctrl->
3432                                            hw_flow) & ~(C_RS_CTS | C_RS_RTS));
3433                 }
3434                 /* As the HW flow control is done in firmware, the driver
3435                    doesn't need to care about it */
3436                 info->flags &= ~ASYNC_CTS_FLOW;
3437
3438                 /* XON/XOFF/XANY flow control flags */
3439                 sw_flow = 0;
3440                 if (iflag & IXON) {
3441                         sw_flow |= C_FL_OXX;
3442                         if (iflag & IXANY)
3443                                 sw_flow |= C_FL_OIXANY;
3444                 }
3445                 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3446
3447                 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
3448                 if (retval != 0) {
3449                         printk("cyc:set_line_char retval on ttyC%d was %x\n",
3450                                 info->line, retval);
3451                 }
3452
3453                 /* CD sensitivity */
3454                 if (cflag & CLOCAL) {
3455                         info->flags &= ~ASYNC_CHECK_CD;
3456                 } else {
3457                         info->flags |= ASYNC_CHECK_CD;
3458                 }
3459
3460                 if (baud == 0) {        /* baud rate is zero, turn off line */
3461                         cy_writel(&ch_ctrl->rs_control,
3462                                   cy_readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3463 #ifdef CY_DEBUG_DTR
3464                         printk("cyc:set_line_char dropping Z DTR\n");
3465 #endif
3466                 } else {
3467                         cy_writel(&ch_ctrl->rs_control,
3468                                   cy_readl(&ch_ctrl->rs_control) | C_RS_DTR);
3469 #ifdef CY_DEBUG_DTR
3470                         printk("cyc:set_line_char raising Z DTR\n");
3471 #endif
3472                 }
3473
3474                 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTLM,0L);
3475                 if (retval != 0) {
3476                         printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
3477                                 info->line, retval);
3478                 }
3479
3480                 if (info->tty) {
3481                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
3482                 }
3483         }
3484 }                               /* set_line_char */
3485
3486 static int
3487 get_serial_info(struct cyclades_port *info,
3488                 struct serial_struct __user * retinfo)
3489 {
3490         struct serial_struct tmp;
3491         struct cyclades_card *cinfo = &cy_card[info->card];
3492
3493         if (!retinfo)
3494                 return -EFAULT;
3495         memset(&tmp, 0, sizeof(tmp));
3496         tmp.type = info->type;
3497         tmp.line = info->line;
3498         tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
3499         tmp.irq = cinfo->irq;
3500         tmp.flags = info->flags;
3501         tmp.close_delay = info->close_delay;
3502         tmp.baud_base = info->baud;
3503         tmp.custom_divisor = info->custom_divisor;
3504         tmp.hub6 = 0;           /*!!! */
3505         return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3506 }                               /* get_serial_info */
3507
3508 static int
3509 set_serial_info(struct cyclades_port *info,
3510                 struct serial_struct __user * new_info)
3511 {
3512         struct serial_struct new_serial;
3513         struct cyclades_port old_info;
3514
3515         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3516                 return -EFAULT;
3517         old_info = *info;
3518
3519         if (!capable(CAP_SYS_ADMIN)) {
3520                 if (new_serial.close_delay != info->close_delay ||
3521                                 new_serial.baud_base != info->baud ||
3522                                 (new_serial.flags & ASYNC_FLAGS &
3523                                         ~ASYNC_USR_MASK) !=
3524                                 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3525                         return -EPERM;
3526                 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3527                                 (new_serial.flags & ASYNC_USR_MASK);
3528                 info->baud = new_serial.baud_base;
3529                 info->custom_divisor = new_serial.custom_divisor;
3530                 goto check_and_exit;
3531         }
3532
3533         /*
3534          * OK, past this point, all the error checking has been done.
3535          * At this point, we start making changes.....
3536          */
3537
3538         info->baud = new_serial.baud_base;
3539         info->custom_divisor = new_serial.custom_divisor;
3540         info->flags = (info->flags & ~ASYNC_FLAGS) |
3541                         (new_serial.flags & ASYNC_FLAGS);
3542         info->close_delay = new_serial.close_delay * HZ / 100;
3543         info->closing_wait = new_serial.closing_wait * HZ / 100;
3544
3545 check_and_exit:
3546         if (info->flags & ASYNC_INITIALIZED) {
3547                 set_line_char(info);
3548                 return 0;
3549         } else {
3550                 return startup(info);
3551         }
3552 }                               /* set_serial_info */
3553
3554 /*
3555  * get_lsr_info - get line status register info
3556  *
3557  * Purpose: Let user call ioctl() to get info when the UART physically
3558  *          is emptied.  On bus types like RS485, the transmitter must
3559  *          release the bus after transmitting. This must be done when
3560  *          the transmit shift register is empty, not be done when the
3561  *          transmit holding register is empty.  This functionality
3562  *          allows an RS485 driver to be written in user space.
3563  */
3564 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3565 {
3566         int card, chip, channel, index;
3567         unsigned char status;
3568         unsigned int result;
3569         unsigned long flags;
3570         void __iomem *base_addr;
3571
3572         card = info->card;
3573         channel = (info->line) - (cy_card[card].first_line);
3574         if (!IS_CYC_Z(cy_card[card])) {
3575                 chip = channel >> 2;
3576                 channel &= 0x03;
3577                 index = cy_card[card].bus_index;
3578                 base_addr =
3579                     cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3580
3581                 CY_LOCK(info, flags);
3582                 status = cy_readb(base_addr + (CySRER << index)) &
3583                                 (CyTxRdy | CyTxMpty);
3584                 CY_UNLOCK(info, flags);
3585                 result = (status ? 0 : TIOCSER_TEMT);
3586         } else {
3587                 /* Not supported yet */
3588                 return -EINVAL;
3589         }
3590         return put_user(result, (unsigned long __user *)value);
3591 }
3592
3593 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3594 {
3595         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3596         int card, chip, channel, index;
3597         void __iomem *base_addr;
3598         unsigned long flags;
3599         unsigned char status;
3600         unsigned long lstatus;
3601         unsigned int result;
3602         struct FIRM_ID __iomem *firm_id;
3603         struct ZFW_CTRL __iomem *zfw_ctrl;
3604         struct BOARD_CTRL __iomem *board_ctrl;
3605         struct CH_CTRL __iomem *ch_ctrl;
3606
3607         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3608                 return -ENODEV;
3609
3610         card = info->card;
3611         channel = (info->line) - (cy_card[card].first_line);
3612         if (!IS_CYC_Z(cy_card[card])) {
3613                 chip = channel >> 2;
3614                 channel &= 0x03;
3615                 index = cy_card[card].bus_index;
3616                 base_addr =
3617                     cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3618
3619                 CY_LOCK(info, flags);
3620                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3621                 status = cy_readb(base_addr + (CyMSVR1 << index));
3622                 status |= cy_readb(base_addr + (CyMSVR2 << index));
3623                 CY_UNLOCK(info, flags);
3624
3625                 if (info->rtsdtr_inv) {
3626                         result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3627                                 ((status & CyDTR) ? TIOCM_RTS : 0);
3628                 } else {
3629                         result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3630                                 ((status & CyDTR) ? TIOCM_DTR : 0);
3631                 }
3632                 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3633                         ((status & CyRI) ? TIOCM_RNG : 0) |
3634                         ((status & CyDSR) ? TIOCM_DSR : 0) |
3635                         ((status & CyCTS) ? TIOCM_CTS : 0);
3636         } else {
3637                 base_addr = cy_card[card].base_addr;
3638
3639                 if (cy_card[card].num_chips != -1) {
3640                         return -EINVAL;
3641                 }
3642
3643                 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3644                 if (ISZLOADED(cy_card[card])) {
3645                         zfw_ctrl = cy_card[card].base_addr +
3646                                 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3647                         board_ctrl = &zfw_ctrl->board_ctrl;
3648                         ch_ctrl = zfw_ctrl->ch_ctrl;
3649                         lstatus = cy_readl(&ch_ctrl[channel].rs_status);
3650                         result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3651                                 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3652                                 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3653                                 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3654                                 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3655                                 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3656                 } else {
3657                         result = 0;
3658                         return -ENODEV;
3659                 }
3660
3661         }
3662         return result;
3663 }                               /* cy_tiomget */
3664
3665 static int
3666 cy_tiocmset(struct tty_struct *tty, struct file *file,
3667                 unsigned int set, unsigned int clear)
3668 {
3669         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3670         int card, chip, channel, index;
3671         void __iomem *base_addr;
3672         unsigned long flags;
3673         struct FIRM_ID __iomem *firm_id;
3674         struct ZFW_CTRL __iomem *zfw_ctrl;
3675         struct BOARD_CTRL __iomem *board_ctrl;
3676         struct CH_CTRL __iomem *ch_ctrl;
3677         int retval;
3678
3679         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3680                 return -ENODEV;
3681
3682         card = info->card;
3683         channel = (info->line) - (cy_card[card].first_line);
3684         if (!IS_CYC_Z(cy_card[card])) {
3685                 chip = channel >> 2;
3686                 channel &= 0x03;
3687                 index = cy_card[card].bus_index;
3688                 base_addr =
3689                     cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3690
3691                 if (set & TIOCM_RTS) {
3692                         CY_LOCK(info, flags);
3693                         cy_writeb(base_addr + (CyCAR << index),
3694                                   (u_char) channel);
3695                         if (info->rtsdtr_inv) {
3696                                 cy_writeb(base_addr + (CyMSVR2 << index),
3697                                           CyDTR);
3698                         } else {
3699                                 cy_writeb(base_addr + (CyMSVR1 << index),
3700                                           CyRTS);
3701                         }
3702                         CY_UNLOCK(info, flags);
3703                 }
3704                 if (clear & TIOCM_RTS) {
3705                         CY_LOCK(info, flags);
3706                         cy_writeb(base_addr + (CyCAR << index),
3707                                   (u_char) channel);
3708                         if (info->rtsdtr_inv) {
3709                                 cy_writeb(base_addr + (CyMSVR2 << index),
3710                                           ~CyDTR);
3711                         } else {
3712                                 cy_writeb(base_addr + (CyMSVR1 << index),
3713                                           ~CyRTS);
3714                         }
3715                         CY_UNLOCK(info, flags);
3716                 }
3717                 if (set & TIOCM_DTR) {
3718                         CY_LOCK(info, flags);
3719                         cy_writeb(base_addr + (CyCAR << index),
3720                                   (u_char) channel);
3721                         if (info->rtsdtr_inv) {
3722                                 cy_writeb(base_addr + (CyMSVR1 << index),
3723                                           CyRTS);
3724                         } else {
3725                                 cy_writeb(base_addr + (CyMSVR2 << index),
3726                                           CyDTR);
3727                         }
3728 #ifdef CY_DEBUG_DTR
3729                         printk("cyc:set_modem_info raising DTR\n");
3730                         printk("     status: 0x%x, 0x%x\n",
3731                                 cy_readb(base_addr + (CyMSVR1 << index)),
3732                                 cy_readb(base_addr + (CyMSVR2 << index)));
3733 #endif
3734                         CY_UNLOCK(info, flags);
3735                 }
3736                 if (clear & TIOCM_DTR) {
3737                         CY_LOCK(info, flags);
3738                         cy_writeb(base_addr + (CyCAR << index),
3739                                   (u_char) channel);
3740                         if (info->rtsdtr_inv) {
3741                                 cy_writeb(base_addr + (CyMSVR1 << index),
3742                                           ~CyRTS);
3743                         } else {
3744                                 cy_writeb(base_addr + (CyMSVR2 << index),
3745                                           ~CyDTR);
3746                         }
3747
3748 #ifdef CY_DEBUG_DTR
3749                         printk("cyc:set_modem_info dropping DTR\n");
3750                         printk("     status: 0x%x, 0x%x\n",
3751                                 cy_readb(base_addr + (CyMSVR1 << index)),
3752                                 cy_readb(base_addr + (CyMSVR2 << index)));
3753 #endif
3754                         CY_UNLOCK(info, flags);
3755                 }
3756         } else {
3757                 base_addr = cy_card[card].base_addr;
3758
3759                 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3760                 if (ISZLOADED(cy_card[card])) {
3761                         zfw_ctrl = cy_card[card].base_addr +
3762                                 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3763                         board_ctrl = &zfw_ctrl->board_ctrl;
3764                         ch_ctrl = zfw_ctrl->ch_ctrl;
3765
3766                         if (set & TIOCM_RTS) {
3767                                 CY_LOCK(info, flags);
3768                                 cy_writel(&ch_ctrl[channel].rs_control,
3769                                           cy_readl(&ch_ctrl[channel].
3770                                                    rs_control) | C_RS_RTS);
3771                                 CY_UNLOCK(info, flags);
3772                         }
3773                         if (clear & TIOCM_RTS) {
3774                                 CY_LOCK(info, flags);
3775                                 cy_writel(&ch_ctrl[channel].rs_control,
3776                                           cy_readl(&ch_ctrl[channel].
3777                                                    rs_control) & ~C_RS_RTS);
3778                                 CY_UNLOCK(info, flags);
3779                         }
3780                         if (set & TIOCM_DTR) {
3781                                 CY_LOCK(info, flags);
3782                                 cy_writel(&ch_ctrl[channel].rs_control,
3783                                           cy_readl(&ch_ctrl[channel].
3784                                                    rs_control) | C_RS_DTR);
3785 #ifdef CY_DEBUG_DTR
3786                                 printk("cyc:set_modem_info raising Z DTR\n");
3787 #endif
3788                                 CY_UNLOCK(info, flags);
3789                         }
3790                         if (clear & TIOCM_DTR) {
3791                                 CY_LOCK(info, flags);
3792                                 cy_writel(&ch_ctrl[channel].rs_control,
3793                                           cy_readl(&ch_ctrl[channel].
3794                                                    rs_control) & ~C_RS_DTR);
3795 #ifdef CY_DEBUG_DTR
3796                                 printk("cyc:set_modem_info clearing Z DTR\n");
3797 #endif
3798                                 CY_UNLOCK(info, flags);
3799                         }
3800                 } else {
3801                         return -ENODEV;
3802                 }
3803                 CY_LOCK(info, flags);
3804                 retval = cyz_issue_cmd(&cy_card[info->card],
3805                                         channel, C_CM_IOCTLM, 0L);
3806                 if (retval != 0) {
3807                         printk("cyc:set_modem_info retval on ttyC%d was %x\n",
3808                                 info->line, retval);
3809                 }
3810                 CY_UNLOCK(info, flags);
3811         }
3812         return 0;
3813 }                               /* cy_tiocmset */
3814
3815 /*
3816  * cy_break() --- routine which turns the break handling on or off
3817  */
3818 static void cy_break(struct tty_struct *tty, int break_state)
3819 {
3820         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3821         unsigned long flags;
3822
3823         if (serial_paranoia_check(info, tty->name, "cy_break"))
3824                 return;
3825
3826         CY_LOCK(info, flags);
3827         if (!IS_CYC_Z(cy_card[info->card])) {
3828                 /* Let the transmit ISR take care of this (since it
3829                    requires stuffing characters into the output stream).
3830                  */
3831                 if (break_state == -1) {
3832                         if (!info->breakon) {
3833                                 info->breakon = 1;
3834                                 if (!info->xmit_cnt) {
3835                                         CY_UNLOCK(info, flags);
3836                                         start_xmit(info);
3837                                         CY_LOCK(info, flags);
3838                                 }
3839                         }
3840                 } else {
3841                         if (!info->breakoff) {
3842                                 info->breakoff = 1;
3843                                 if (!info->xmit_cnt) {
3844                                         CY_UNLOCK(info, flags);
3845                                         start_xmit(info);
3846                                         CY_LOCK(info, flags);
3847                                 }
3848                         }
3849                 }
3850         } else {
3851                 int retval;
3852
3853                 if (break_state == -1) {
3854                         retval = cyz_issue_cmd(&cy_card[info->card],
3855                                 info->line - cy_card[info->card].first_line,
3856                                 C_CM_SET_BREAK, 0L);
3857                         if (retval != 0) {
3858                                 printk("cyc:cy_break (set) retval on ttyC%d "
3859                                         "was %x\n", info->line, retval);
3860                         }
3861                 } else {
3862                         retval = cyz_issue_cmd(&cy_card[info->card],
3863                                 info->line - cy_card[info->card].first_line,
3864                                 C_CM_CLR_BREAK, 0L);
3865                         if (retval != 0) {
3866                                 printk("cyc:cy_break (clr) retval on ttyC%d "
3867                                         "was %x\n", info->line, retval);
3868                         }
3869                 }
3870         }
3871         CY_UNLOCK(info, flags);
3872 }                               /* cy_break */
3873
3874 static int
3875 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3876 {
3877
3878         if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3879                 return -EFAULT;
3880         info->mon.int_count = 0;
3881         info->mon.char_count = 0;
3882         info->mon.char_max = 0;
3883         info->mon.char_last = 0;
3884         return 0;
3885 }                               /* get_mon_info */
3886
3887 static int set_threshold(struct cyclades_port *info, unsigned long value)
3888 {
3889         void __iomem *base_addr;
3890         int card, channel, chip, index;
3891         unsigned long flags;
3892
3893         card = info->card;
3894         channel = info->line - cy_card[card].first_line;
3895         if (!IS_CYC_Z(cy_card[card])) {
3896                 chip = channel >> 2;
3897                 channel &= 0x03;
3898                 index = cy_card[card].bus_index;
3899                 base_addr =
3900                     cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3901
3902                 info->cor3 &= ~CyREC_FIFO;
3903                 info->cor3 |= value & CyREC_FIFO;
3904
3905                 CY_LOCK(info, flags);
3906                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3907                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3908                 CY_UNLOCK(info, flags);
3909         } else {
3910                 /* Nothing to do! */
3911         }
3912         return 0;
3913 }                               /* set_threshold */
3914
3915 static int
3916 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3917 {
3918         void __iomem *base_addr;
3919         int card, channel, chip, index;
3920         unsigned long tmp;
3921
3922         card = info->card;
3923         channel = info->line - cy_card[card].first_line;
3924         if (!IS_CYC_Z(cy_card[card])) {
3925                 chip = channel >> 2;
3926                 channel &= 0x03;
3927                 index = cy_card[card].bus_index;
3928                 base_addr =
3929                     cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3930
3931                 tmp = cy_readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3932                 return put_user(tmp, value);
3933         } else {
3934                 /* Nothing to do! */
3935                 return 0;
3936         }
3937 }                               /* get_threshold */
3938
3939 static int
3940 set_default_threshold(struct cyclades_port *info, unsigned long value)
3941 {
3942         info->default_threshold = value & 0x0f;
3943         return 0;
3944 }                               /* set_default_threshold */
3945
3946 static int
3947 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3948 {
3949         return put_user(info->default_threshold, value);
3950 }                               /* get_default_threshold */
3951
3952 static int set_timeout(struct cyclades_port *info, unsigned long value)
3953 {
3954         void __iomem *base_addr;
3955         int card, channel, chip, index;
3956         unsigned long flags;
3957
3958         card = info->card;
3959         channel = info->line - cy_card[card].first_line;
3960         if (!IS_CYC_Z(cy_card[card])) {
3961                 chip = channel >> 2;
3962                 channel &= 0x03;
3963                 index = cy_card[card].bus_index;
3964                 base_addr =
3965                     cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3966
3967                 CY_LOCK(info, flags);
3968                 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3969                 CY_UNLOCK(info, flags);
3970         } else {
3971                 /* Nothing to do! */
3972         }
3973         return 0;
3974 }                               /* set_timeout */
3975
3976 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3977 {
3978         void __iomem *base_addr;
3979         int card, channel, chip, index;
3980         unsigned long tmp;
3981
3982         card = info->card;
3983         channel = info->line - cy_card[card].first_line;
3984         if (!IS_CYC_Z(cy_card[card])) {
3985                 chip = channel >> 2;
3986                 channel &= 0x03;
3987                 index = cy_card[card].bus_index;
3988                 base_addr =
3989                     cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3990
3991                 tmp = cy_readb(base_addr + (CyRTPR << index));
3992                 return put_user(tmp, value);
3993         } else {
3994                 /* Nothing to do! */
3995                 return 0;
3996         }
3997 }                               /* get_timeout */
3998
3999 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
4000 {
4001         info->default_timeout = value & 0xff;
4002         return 0;
4003 }                               /* set_default_timeout */
4004
4005 static int
4006 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
4007 {
4008         return put_user(info->default_timeout, value);
4009 }                               /* get_default_timeout */
4010
4011 /*
4012  * This routine allows the tty driver to implement device-
4013  * specific ioctl's.  If the ioctl number passed in cmd is
4014  * not recognized by the driver, it should return ENOIOCTLCMD.
4015  */
4016 static int
4017 cy_ioctl(struct tty_struct *tty, struct file *file,
4018          unsigned int cmd, unsigned long arg)
4019 {
4020         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4021         struct cyclades_icount cprev, cnow;     /* kernel counter temps */
4022         struct serial_icounter_struct __user *p_cuser;  /* user space */
4023         int ret_val = 0;
4024         unsigned long flags;
4025         void __user *argp = (void __user *)arg;
4026
4027         if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
4028                 return -ENODEV;
4029
4030 #ifdef CY_DEBUG_OTHER
4031         printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg);      /* */
4032 #endif
4033
4034         switch (cmd) {
4035         case CYGETMON:
4036                 ret_val = get_mon_info(info, argp);
4037                 break;
4038         case CYGETTHRESH:
4039                 ret_val = get_threshold(info, argp);
4040                 break;
4041         case CYSETTHRESH:
4042                 ret_val = set_threshold(info, arg);
4043                 break;
4044         case CYGETDEFTHRESH:
4045                 ret_val = get_default_threshold(info, argp);
4046                 break;
4047         case CYSETDEFTHRESH:
4048                 ret_val = set_default_threshold(info, arg);
4049                 break;
4050         case CYGETTIMEOUT:
4051                 ret_val = get_timeout(info, argp);
4052                 break;
4053         case CYSETTIMEOUT:
4054                 ret_val = set_timeout(info, arg);
4055                 break;
4056         case CYGETDEFTIMEOUT:
4057                 ret_val = get_default_timeout(info, argp);
4058                 break;
4059         case CYSETDEFTIMEOUT:
4060                 ret_val = set_default_timeout(info, arg);
4061                 break;
4062         case CYSETRFLOW:
4063                 info->rflow = (int)arg;
4064                 ret_val = 0;
4065                 break;
4066         case CYGETRFLOW:
4067                 ret_val = info->rflow;
4068                 break;
4069         case CYSETRTSDTR_INV:
4070                 info->rtsdtr_inv = (int)arg;
4071                 ret_val = 0;
4072                 break;
4073         case CYGETRTSDTR_INV:
4074                 ret_val = info->rtsdtr_inv;
4075                 break;
4076         case CYGETCARDINFO:
4077                 if (copy_to_user(argp, &cy_card[info->card],
4078                                  sizeof(struct cyclades_card))) {
4079                         ret_val = -EFAULT;
4080                         break;
4081                 }
4082                 ret_val = 0;
4083                 break;
4084         case CYGETCD1400VER:
4085                 ret_val = info->chip_rev;
4086                 break;
4087 #ifndef CONFIG_CYZ_INTR
4088         case CYZSETPOLLCYCLE:
4089                 cyz_polling_cycle = (arg * HZ) / 1000;
4090                 ret_val = 0;
4091                 break;
4092         case CYZGETPOLLCYCLE:
4093                 ret_val = (cyz_polling_cycle * 1000) / HZ;
4094                 break;
4095 #endif                          /* CONFIG_CYZ_INTR */
4096         case CYSETWAIT:
4097                 info->closing_wait = (unsigned short)arg *HZ / 100;
4098                 ret_val = 0;
4099                 break;
4100         case CYGETWAIT:
4101                 ret_val = info->closing_wait / (HZ / 100);
4102                 break;
4103         case TIOCGSERIAL:
4104                 ret_val = get_serial_info(info, argp);
4105                 break;
4106         case TIOCSSERIAL:
4107                 ret_val = set_serial_info(info, argp);
4108                 break;
4109         case TIOCSERGETLSR:     /* Get line status register */
4110                 ret_val = get_lsr_info(info, argp);
4111                 break;
4112                 /*
4113                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4114                  * - mask passed in arg for lines of interest
4115                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4116                  * Caller should use TIOCGICOUNT to see which one it was
4117                  */
4118         case TIOCMIWAIT:
4119                 CY_LOCK(info, flags);
4120                 /* note the counters on entry */
4121                 cprev = info->icount;
4122                 CY_UNLOCK(info, flags);
4123                 while (1) {
4124                         interruptible_sleep_on(&info->delta_msr_wait);
4125                         /* see if a signal did it */
4126                         if (signal_pending(current)) {
4127                                 return -ERESTARTSYS;
4128                         }
4129
4130                         CY_LOCK(info, flags);
4131                         cnow = info->icount;    /* atomic copy */
4132                         CY_UNLOCK(info, flags);
4133
4134                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4135                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4136                                 return -EIO;    /* no change => error */
4137                         }
4138                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4139                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4140                             ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4141                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
4142                                 return 0;
4143                         }
4144                         cprev = cnow;
4145                 }
4146                 /* NOTREACHED */
4147
4148                 /*
4149                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4150                  * Return: write counters to the user passed counter struct
4151                  * NB: both 1->0 and 0->1 transitions are counted except for
4152                  *     RI where only 0->1 is counted.
4153                  */
4154         case TIOCGICOUNT:
4155                 CY_LOCK(info, flags);
4156                 cnow = info->icount;
4157                 CY_UNLOCK(info, flags);
4158                 p_cuser = argp;
4159                 ret_val = put_user(cnow.cts, &p_cuser->cts);
4160                 if (ret_val)
4161                         return ret_val;
4162                 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4163                 if (ret_val)
4164                         return ret_val;
4165                 ret_val = put_user(cnow.rng, &p_cuser->rng);
4166                 if (ret_val)
4167                         return ret_val;
4168                 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4169                 if (ret_val)
4170                         return ret_val;
4171                 ret_val = put_user(cnow.rx, &p_cuser->rx);
4172                 if (ret_val)
4173                         return ret_val;
4174                 ret_val = put_user(cnow.tx, &p_cuser->tx);
4175                 if (ret_val)
4176                         return ret_val;
4177                 ret_val = put_user(cnow.frame, &p_cuser->frame);
4178                 if (ret_val)
4179                         return ret_val;
4180                 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4181                 if (ret_val)
4182                         return ret_val;
4183                 ret_val = put_user(cnow.parity, &p_cuser->parity);
4184                 if (ret_val)
4185                         return ret_val;
4186                 ret_val = put_user(cnow.brk, &p_cuser->brk);
4187                 if (ret_val)
4188                         return ret_val;
4189                 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4190                 if (ret_val)
4191                         return ret_val;
4192                 ret_val = 0;
4193                 break;
4194         default:
4195                 ret_val = -ENOIOCTLCMD;
4196         }
4197
4198 #ifdef CY_DEBUG_OTHER
4199         printk(" cyc:cy_ioctl done\n");
4200 #endif
4201
4202         return ret_val;
4203 }                               /* cy_ioctl */
4204
4205 /*
4206  * This routine allows the tty driver to be notified when
4207  * device's termios settings have changed.  Note that a
4208  * well-designed tty driver should be prepared to accept the case
4209  * where old == NULL, and try to do something rational.
4210  */
4211 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4212 {
4213         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4214
4215 #ifdef CY_DEBUG_OTHER
4216         printk("cyc:cy_set_termios ttyC%d\n", info->line);
4217 #endif
4218
4219         if (tty->termios->c_cflag == old_termios->c_cflag &&
4220                         (tty->termios->c_iflag & (IXON | IXANY)) ==
4221                         (old_termios->c_iflag & (IXON | IXANY)))
4222                 return;
4223         set_line_char(info);
4224
4225         if ((old_termios->c_cflag & CRTSCTS) &&
4226                         !(tty->termios->c_cflag & CRTSCTS)) {
4227                 tty->hw_stopped = 0;
4228                 cy_start(tty);
4229         }
4230 #if 0
4231         /*
4232          * No need to wake up processes in open wait, since they
4233          * sample the CLOCAL flag once, and don't recheck it.
4234          * XXX  It's not clear whether the current behavior is correct
4235          * or not.  Hence, this may change.....
4236          */
4237         if (!(old_termios->c_cflag & CLOCAL) &&
4238             (tty->termios->c_cflag & CLOCAL))
4239                 wake_up_interruptible(&info->open_wait);
4240 #endif
4241 }                               /* cy_set_termios */
4242
4243 /* This function is used to send a high-priority XON/XOFF character to
4244    the device.
4245 */
4246 static void cy_send_xchar(struct tty_struct *tty, char ch)
4247 {
4248         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4249         int card, channel;
4250
4251         if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4252                 return;
4253
4254         info->x_char = ch;
4255
4256         if (ch)
4257                 cy_start(tty);
4258
4259         card = info->card;
4260         channel = info->line - cy_card[card].first_line;
4261
4262         if (IS_CYC_Z(cy_card[card])) {
4263                 if (ch == STOP_CHAR(tty))
4264                         cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXOFF,
4265                                         0L);
4266                 else if (ch == START_CHAR(tty))
4267                         cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXON,
4268                                         0L);
4269         }
4270 }
4271
4272 /* This routine is called by the upper-layer tty layer to signal
4273    that incoming characters should be throttled because the input
4274    buffers are close to full.
4275  */
4276 static void cy_throttle(struct tty_struct *tty)
4277 {
4278         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4279         unsigned long flags;
4280         void __iomem *base_addr;
4281         int card, chip, channel, index;
4282
4283 #ifdef CY_DEBUG_THROTTLE
4284         char buf[64];
4285
4286         printk("cyc:throttle %s: %d....ttyC%d\n", tty_name(tty, buf),
4287                         tty->ldisc.chars_in_buffer(tty), info->line);
4288 #endif
4289
4290         if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4291                 return;
4292         }
4293
4294         card = info->card;
4295
4296         if (I_IXOFF(tty)) {
4297                 if (!IS_CYC_Z(cy_card[card]))
4298                         cy_send_xchar(tty, STOP_CHAR(tty));
4299                 else
4300                         info->throttle = 1;
4301         }
4302
4303         if (tty->termios->c_cflag & CRTSCTS) {
4304                 channel = info->line - cy_card[card].first_line;
4305                 if (!IS_CYC_Z(cy_card[card])) {
4306                         chip = channel >> 2;
4307                         channel &= 0x03;
4308                         index = cy_card[card].bus_index;
4309                         base_addr = cy_card[card].base_addr +
4310                                 (cy_chip_offset[chip] << index);
4311
4312                         CY_LOCK(info, flags);
4313                         cy_writeb(base_addr + (CyCAR << index),
4314                                   (u_char) channel);
4315                         if (info->rtsdtr_inv) {
4316                                 cy_writeb(base_addr + (CyMSVR2 << index),
4317                                           ~CyDTR);
4318                         } else {
4319                                 cy_writeb(base_addr + (CyMSVR1 << index),
4320                                           ~CyRTS);
4321                         }
4322                         CY_UNLOCK(info, flags);
4323                 } else {
4324                         info->throttle = 1;
4325                 }
4326         }
4327 }                               /* cy_throttle */
4328
4329 /*
4330  * This routine notifies the tty driver that it should signal
4331  * that characters can now be sent to the tty without fear of
4332  * overrunning the input buffers of the line disciplines.
4333  */
4334 static void cy_unthrottle(struct tty_struct *tty)
4335 {
4336         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4337         unsigned long flags;
4338         void __iomem *base_addr;
4339         int card, chip, channel, index;
4340
4341 #ifdef CY_DEBUG_THROTTLE
4342         char buf[64];
4343
4344         printk("cyc:unthrottle %s: %d....ttyC%d\n", tty_name(tty, buf),
4345                 tty->ldisc.chars_in_buffer(tty), info->line);
4346 #endif
4347
4348         if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4349                 return;
4350         }
4351
4352         if (I_IXOFF(tty)) {
4353                 if (info->x_char)
4354                         info->x_char = 0;
4355                 else
4356                         cy_send_xchar(tty, START_CHAR(tty));
4357         }
4358
4359         if (tty->termios->c_cflag & CRTSCTS) {
4360                 card = info->card;
4361                 channel = info->line - cy_card[card].first_line;
4362                 if (!IS_CYC_Z(cy_card[card])) {
4363                         chip = channel >> 2;
4364                         channel &= 0x03;
4365                         index = cy_card[card].bus_index;
4366                         base_addr = cy_card[card].base_addr +
4367                                 (cy_chip_offset[chip] << index);
4368
4369                         CY_LOCK(info, flags);
4370                         cy_writeb(base_addr + (CyCAR << index),
4371                                   (u_char) channel);
4372                         if (info->rtsdtr_inv) {
4373                                 cy_writeb(base_addr + (CyMSVR2 << index),
4374                                           CyDTR);
4375                         } else {
4376                                 cy_writeb(base_addr + (CyMSVR1 << index),
4377                                           CyRTS);
4378                         }
4379                         CY_UNLOCK(info, flags);
4380                 } else {
4381                         info->throttle = 0;
4382                 }
4383         }
4384 }                               /* cy_unthrottle */
4385
4386 /* cy_start and cy_stop provide software output flow control as a
4387    function of XON/XOFF, software CTS, and other such stuff.
4388 */
4389 static void cy_stop(struct tty_struct *tty)
4390 {
4391         struct cyclades_card *cinfo;
4392         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4393         void __iomem *base_addr;
4394         int chip, channel, index;
4395         unsigned long flags;
4396
4397 #ifdef CY_DEBUG_OTHER
4398         printk("cyc:cy_stop ttyC%d\n", info->line);     /* */
4399 #endif
4400
4401         if (serial_paranoia_check(info, tty->name, "cy_stop"))
4402                 return;
4403
4404         cinfo = &cy_card[info->card];
4405         channel = info->line - cinfo->first_line;
4406         if (!IS_CYC_Z(*cinfo)) {
4407                 index = cinfo->bus_index;
4408                 chip = channel >> 2;
4409                 channel &= 0x03;
4410                 base_addr = cy_card[info->card].base_addr +
4411                         (cy_chip_offset[chip] << index);
4412
4413                 CY_LOCK(info, flags);
4414                 cy_writeb(base_addr + (CyCAR << index),
4415                         (u_char)(channel & 0x0003)); /* index channel */
4416                 cy_writeb(base_addr + (CySRER << index),
4417                           cy_readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4418                 CY_UNLOCK(info, flags);
4419         } else {
4420                 /* Nothing to do! */
4421         }
4422 }                               /* cy_stop */
4423
4424 static void cy_start(struct tty_struct *tty)
4425 {
4426         struct cyclades_card *cinfo;
4427         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4428         void __iomem *base_addr;
4429         int chip, channel, index;
4430         unsigned long flags;
4431
4432 #ifdef CY_DEBUG_OTHER
4433         printk("cyc:cy_start ttyC%d\n", info->line);    /* */
4434 #endif
4435
4436         if (serial_paranoia_check(info, tty->name, "cy_start"))
4437                 return;
4438
4439         cinfo = &cy_card[info->card];
4440         channel = info->line - cinfo->first_line;
4441         index = cinfo->bus_index;
4442         if (!IS_CYC_Z(*cinfo)) {
4443                 chip = channel >> 2;
4444                 channel &= 0x03;
4445                 base_addr = cy_card[info->card].base_addr +
4446                         (cy_chip_offset[chip] << index);
4447
4448                 CY_LOCK(info, flags);
4449                 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003));   /* index channel */
4450                 cy_writeb(base_addr + (CySRER << index),
4451                           cy_readb(base_addr + (CySRER << index)) | CyTxRdy);
4452                 CY_UNLOCK(info, flags);
4453         } else {
4454                 /* Nothing to do! */
4455         }
4456 }                               /* cy_start */
4457
4458 static void cy_flush_buffer(struct tty_struct *tty)
4459 {
4460         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4461         int card, channel, retval;
4462         unsigned long flags;
4463
4464 #ifdef CY_DEBUG_IO
4465         printk("cyc:cy_flush_buffer ttyC%d\n", info->line);     /* */
4466 #endif
4467
4468         if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4469                 return;
4470
4471         card = info->card;
4472         channel = (info->line) - (cy_card[card].first_line);
4473
4474         CY_LOCK(info, flags);
4475         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4476         CY_UNLOCK(info, flags);
4477
4478         if (IS_CYC_Z(cy_card[card])) {  /* If it is a Z card, flush the on-board
4479                                            buffers as well */
4480                 CY_LOCK(info, flags);
4481                 retval =
4482                     cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
4483                 if (retval != 0) {
4484                         printk("cyc: flush_buffer retval on ttyC%d was %x\n",
4485                                 info->line, retval);
4486                 }
4487                 CY_UNLOCK(info, flags);
4488         }
4489         tty_wakeup(tty);
4490         wake_up_interruptible(&tty->write_wait);
4491 }                               /* cy_flush_buffer */
4492
4493 /*
4494  * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4495  */
4496 static void cy_hangup(struct tty_struct *tty)
4497 {
4498         struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4499
4500 #ifdef CY_DEBUG_OTHER
4501         printk("cyc:cy_hangup ttyC%d\n", info->line);   /* */
4502 #endif
4503
4504         if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4505                 return;
4506
4507         cy_flush_buffer(tty);
4508         shutdown(info);
4509         info->event = 0;
4510         info->count = 0;
4511 #ifdef CY_DEBUG_COUNT
4512         printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
4513 #endif
4514         info->tty = NULL;
4515         info->flags &= ~ASYNC_NORMAL_ACTIVE;
4516         wake_up_interruptible(&info->open_wait);
4517 }                               /* cy_hangup */
4518
4519 /*
4520  * ---------------------------------------------------------------------
4521  * cy_init() and friends
4522  *
4523  * cy_init() is called at boot-time to initialize the serial driver.
4524  * ---------------------------------------------------------------------
4525  */
4526
4527 /* initialize chips on Cyclom-Y card -- return number of valid
4528    chips (which is number of ports/4) */
4529 static unsigned short __init
4530 cyy_init_card(void __iomem * true_base_addr, int index)
4531 {
4532         unsigned int chip_number;
4533         void __iomem *base_addr;
4534
4535         cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4536         /* Cy_HwReset is 0x1400 */
4537         cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4538         /* Cy_ClrIntr is 0x1800 */
4539         udelay(500L);
4540
4541         for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4542                 base_addr =
4543                     true_base_addr + (cy_chip_offset[chip_number] << index);
4544                 mdelay(1);
4545                 if (cy_readb(base_addr + (CyCCR << index)) != 0x00) {
4546                         /*************
4547                         printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4548                         chip_number, (unsigned long)base_addr);
4549                         *************/
4550                         return chip_number;
4551                 }
4552
4553                 cy_writeb(base_addr + (CyGFRCR << index), 0);
4554                 udelay(10L);
4555
4556                 /* The Cyclom-16Y does not decode address bit 9 and therefore
4557                    cannot distinguish between references to chip 0 and a non-
4558                    existent chip 4.  If the preceding clearing of the supposed
4559                    chip 4 GFRCR register appears at chip 0, there is no chip 4
4560                    and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4561                  */
4562                 if (chip_number == 4 && cy_readb(true_base_addr +
4563                                 (cy_chip_offset[0] << index) +
4564                                 (CyGFRCR << index)) == 0) {
4565                         return chip_number;
4566                 }
4567
4568                 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4569                 mdelay(1);
4570
4571                 if (cy_readb(base_addr + (CyGFRCR << index)) == 0x00) {
4572                         /*
4573                            printk(" chip #%d at %#6lx is not responding ",
4574                            chip_number, (unsigned long)base_addr);
4575                            printk("(GFRCR stayed 0)\n",
4576                          */
4577                         return chip_number;
4578                 }
4579                 if ((0xf0 & (cy_readb(base_addr + (CyGFRCR << index)))) !=
4580                                 0x40) {
4581                         /*
4582                         printk(" chip #%d at %#6lx is not valid (GFRCR == "
4583                                         "%#2x)\n",
4584                                         chip_number, (unsigned long)base_addr,
4585                                         base_addr[CyGFRCR<<index]);
4586                          */
4587                         return chip_number;
4588                 }
4589                 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4590                 if (cy_readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4591                         /* It is a CD1400 rev. J or later */
4592                         /* Impossible to reach 5ms with this chip.
4593                            Changed to 2ms instead (f = 500 Hz). */
4594                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4595                 } else {
4596                         /* f = 200 Hz */
4597                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4598                 }
4599
4600                 /*
4601                    printk(" chip #%d at %#6lx is rev 0x%2x\n",
4602                    chip_number, (unsigned long)base_addr,
4603                    cy_readb(base_addr+(CyGFRCR<<index)));
4604                  */
4605         }
4606         return chip_number;
4607 }                               /* cyy_init_card */
4608
4609 /*
4610  * ---------------------------------------------------------------------
4611  * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4612  * sets global variables and return the number of ISA boards found.
4613  * ---------------------------------------------------------------------
4614  */
4615 static int __init cy_detect_isa(void)
4616 {
4617 #ifdef CONFIG_ISA
4618         unsigned short cy_isa_irq, nboard;
4619         void __iomem *cy_isa_address;
4620         unsigned short i, j, cy_isa_nchan;
4621 #ifdef MODULE
4622         int isparam = 0;
4623 #endif
4624
4625         nboard = 0;
4626
4627 #ifdef MODULE
4628         /* Check for module parameters */
4629         for (i = 0; i < NR_CARDS; i++) {
4630                 if (maddr[i] || i) {
4631                         isparam = 1;
4632                         cy_isa_addresses[i] = maddr[i];
4633                 }
4634                 if (!maddr[i])
4635                         break;
4636         }
4637 #endif
4638
4639         /* scan the address table probing for Cyclom-Y/ISA boards */
4640         for (i = 0; i < NR_ISA_ADDRS; i++) {
4641                 unsigned int isa_address = cy_isa_addresses[i];
4642                 if (isa_address == 0x0000) {
4643                         return nboard;
4644                 }
4645
4646                 /* probe for CD1400... */
4647                 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4648                 cy_isa_nchan = CyPORTS_PER_CHIP *
4649                         cyy_init_card(cy_isa_address, 0);
4650                 if (cy_isa_nchan == 0) {
4651                         continue;
4652                 }
4653 #ifdef MODULE
4654                 if (isparam && irq[i])
4655                         cy_isa_irq = irq[i];
4656                 else
4657 #endif
4658                         /* find out the board's irq by probing */
4659                         cy_isa_irq = detect_isa_irq(cy_isa_address);
4660                 if (cy_isa_irq == 0) {
4661                         printk("Cyclom-Y/ISA found at 0x%lx ",
4662                                 (unsigned long)cy_isa_address);
4663                         printk("but the IRQ could not be detected.\n");
4664                         continue;
4665                 }
4666
4667                 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4668                         printk("Cyclom-Y/ISA found at 0x%lx ",
4669                                 (unsigned long)cy_isa_address);
4670                         printk("but no more channels are available.\n");
4671                         printk("Change NR_PORTS in cyclades.c and recompile "
4672                                         "kernel.\n");
4673                         return nboard;
4674                 }
4675                 /* fill the next cy_card structure available */
4676                 for (j = 0; j < NR_CARDS; j++) {
4677                         if (cy_card[j].base_addr == 0)
4678                                 break;
4679                 }
4680                 if (j == NR_CARDS) {    /* no more cy_cards available */
4681                         printk("Cyclom-Y/ISA found at 0x%lx ",
4682                                 (unsigned long)cy_isa_address);
4683                         printk("but no more cards can be used .\n");
4684                         printk("Change NR_CARDS in cyclades.c and recompile "
4685                                         "kernel.\n");
4686                         return nboard;
4687                 }
4688
4689                 /* allocate IRQ */
4690                 if (request_irq(cy_isa_irq, cyy_interrupt,
4691                                 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4692                         printk("Cyclom-Y/ISA found at 0x%lx ",
4693                                 (unsigned long)cy_isa_address);
4694                         printk("but could not allocate IRQ#%d.\n", cy_isa_irq);
4695                         return nboard;
4696                 }
4697
4698                 /* set cy_card */
4699                 cy_card[j].base_addr = cy_isa_address;
4700                 cy_card[j].ctl_addr = NULL;
4701                 cy_card[j].irq = (int)cy_isa_irq;
4702                 cy_card[j].bus_index = 0;
4703                 cy_card[j].first_line = cy_next_channel;
4704                 cy_card[j].num_chips = cy_isa_nchan / 4;
4705                 nboard++;
4706
4707                 /* print message */
4708                 printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
4709                         j + 1, (unsigned long)cy_isa_address,
4710                         (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4711                         cy_isa_irq);
4712                 printk("%d channels starting from port %d.\n",
4713                         cy_isa_nchan, cy_next_channel);
4714                 cy_next_channel += cy_isa_nchan;
4715         }
4716         return nboard;
4717 #else
4718         return 0;
4719 #endif                          /* CONFIG_ISA */
4720 }                               /* cy_detect_isa */
4721
4722 static void plx_init(void __iomem * addr, uclong initctl)
4723 {
4724         /* Reset PLX */
4725         cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x40000000);
4726         udelay(100L);
4727         cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x40000000);
4728
4729         /* Reload Config. Registers from EEPROM */
4730         cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x20000000);
4731         udelay(100L);
4732         cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x20000000);
4733 }
4734
4735 /*
4736  * ---------------------------------------------------------------------
4737  * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
4738  * sets global variables and return the number of PCI boards found.
4739  * ---------------------------------------------------------------------
4740  */
4741 static int __init cy_detect_pci(void)
4742 {
4743 #ifdef CONFIG_PCI
4744
4745         struct pci_dev *pdev = NULL;
4746         unsigned char cyy_rev_id;
4747         unsigned char cy_pci_irq = 0;
4748         uclong cy_pci_phys0, cy_pci_phys2;
4749         void __iomem *cy_pci_addr0, *cy_pci_addr2;
4750         unsigned short i, j, cy_pci_nchan, plx_ver;
4751         unsigned short device_id, dev_index = 0;
4752         uclong mailbox;
4753         uclong ZeIndex = 0;
4754         void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS];
4755         uclong Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
4756         unsigned char Ze_irq[NR_CARDS];
4757         struct pci_dev *Ze_pdev[NR_CARDS];
4758
4759         for (i = 0; i < NR_CARDS; i++) {
4760                 /* look for a Cyclades card by vendor and device id */
4761                 while ((device_id = cy_pci_dev_id[dev_index]) != 0) {
4762                         if ((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
4763                                                    device_id, pdev)) == NULL) {
4764                                 dev_index++;    /* try next device id */
4765                         } else {
4766                                 break;  /* found a board */
4767                         }
4768                 }
4769
4770                 if (device_id == 0)
4771                         break;
4772
4773                 if (pci_enable_device(pdev))
4774                         continue;
4775
4776                 /* read PCI configuration area */
4777                 cy_pci_irq = pdev->irq;
4778                 cy_pci_phys0 = pci_resource_start(pdev, 0);
4779                 cy_pci_phys2 = pci_resource_start(pdev, 2);
4780                 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4781
4782                 device_id &= ~PCI_DEVICE_ID_MASK;
4783
4784                 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4785                                 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4786 #ifdef CY_PCI_DEBUG
4787                         printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4788                                 pdev->bus->number, pdev->devfn);
4789                         printk("rev_id=%d) IRQ%d\n",
4790                                 cyy_rev_id, (int)cy_pci_irq);
4791                         printk("Cyclom-Y/PCI:found  winaddr=0x%lx "
4792                                 "ctladdr=0x%lx\n",
4793                                 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4794 #endif
4795
4796                         if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4797                                 printk("  Warning: PCI I/O bit incorrectly "
4798                                         "set. Ignoring it...\n");
4799                                 pdev->resource[2].flags &= ~IORESOURCE_IO;
4800                         }
4801
4802                         /* Although we don't use this I/O region, we should
4803                            request it from the kernel anyway, to avoid problems
4804                            with other drivers accessing it. */
4805                         if (pci_request_regions(pdev, "Cyclom-Y") != 0) {
4806                                 printk(KERN_ERR "cyclades: failed to reserve "
4807                                                 "PCI resources\n");
4808                                 continue;
4809                         }
4810 #if defined(__alpha__)
4811                         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {   /* below 1M? */
4812                                 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4813                                         pdev->bus->number, pdev->devfn);
4814                                 printk("rev_id=%d) IRQ%d\n",
4815                                         cyy_rev_id, (int)cy_pci_irq);
4816                                 printk("Cyclom-Y/PCI:found  winaddr=0x%lx "
4817                                         "ctladdr=0x%lx\n",
4818                                         (ulong)cy_pci_phys2,
4819                                         (ulong)cy_pci_phys0);
4820                                 printk("Cyclom-Y/PCI not supported for low "
4821                                         "addresses in Alpha systems.\n");
4822                                 i--;
4823                                 continue;
4824                         }
4825 #endif
4826                         cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl);
4827                         cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin);
4828
4829 #ifdef CY_PCI_DEBUG
4830                         printk("Cyclom-Y/PCI: relocate winaddr=0x%lx "
4831                                 "ctladdr=0x%lx\n",
4832                                 (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
4833 #endif
4834                         cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4835                                         cyy_init_card(cy_pci_addr2, 1));
4836                         if (cy_pci_nchan == 0) {
4837                                 printk("Cyclom-Y PCI host card with ");
4838                                 printk("no Serial-Modules at 0x%lx.\n",
4839                                         (ulong) cy_pci_phys2);
4840                                 i--;
4841                                 continue;
4842                         }
4843                         if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4844                                 printk("Cyclom-Y/PCI found at 0x%lx ",
4845                                         (ulong) cy_pci_phys2);
4846                                 printk("but no channels are available.\n");
4847                                 printk("Change NR_PORTS in cyclades.c and "
4848                                                 "recompile kernel.\n");
4849                                 return i;
4850                         }
4851                         /* fill the next cy_card structure available */
4852                         for (j = 0; j < NR_CARDS; j++) {
4853                                 if (cy_card[j].base_addr == 0)
4854                                         break;
4855                         }
4856                         if (j == NR_CARDS) {    /* no more cy_cards available */
4857                                 printk("Cyclom-Y/PCI found at 0x%lx ",
4858                                         (ulong) cy_pci_phys2);
4859                                 printk("but no more cards can be used.\n");
4860                                 printk("Change NR_CARDS in cyclades.c and "
4861                                                 "recompile kernel.\n");
4862                                 return i;
4863                         }
4864
4865                         /* allocate IRQ */
4866                         if (request_irq(cy_pci_irq, cyy_interrupt,
4867                                         IRQF_SHARED, "Cyclom-Y", &cy_card[j])) {
4868                                 printk("Cyclom-Y/PCI found at 0x%lx ",
4869                                         (ulong) cy_pci_phys2);
4870                                 printk("but could not allocate IRQ%d.\n",
4871                                         cy_pci_irq);
4872                                 return i;
4873                         }
4874
4875                         /* set cy_card */
4876                         cy_card[j].base_phys = (ulong) cy_pci_phys2;
4877                         cy_card[j].ctl_phys = (ulong) cy_pci_phys0;
4878                         cy_card[j].base_addr = cy_pci_addr2;
4879                         cy_card[j].ctl_addr = cy_pci_addr0;
4880                         cy_card[j].irq = (int)cy_pci_irq;
4881                         cy_card[j].bus_index = 1;
4882                         cy_card[j].first_line = cy_next_channel;
4883                         cy_card[j].num_chips = cy_pci_nchan / 4;
4884                         cy_card[j].pdev = pdev;
4885
4886                         /* enable interrupts in the PCI interface */
4887                         plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4888                         switch (plx_ver) {
4889                         case PLX_9050:
4890
4891                                 cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
4892                                 break;
4893
4894                         case PLX_9060:
4895                         case PLX_9080:
4896                         default:        /* Old boards, use PLX_9060 */
4897
4898                                 plx_init(cy_pci_addr0, 0x6c);
4899                         /* For some yet unknown reason, once the PLX9060 reloads
4900                            the EEPROM, the IRQ is lost and, thus, we have to
4901                            re-write it to the PCI config. registers.
4902                            This will remain here until we find a permanent
4903                            fix. */
4904                                 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4905                                                 cy_pci_irq);
4906
4907                                 cy_writew(cy_pci_addr0 + 0x68,
4908                                           cy_readw(cy_pci_addr0 +
4909                                                    0x68) | 0x0900);
4910                                 break;
4911                         }
4912
4913                         /* print message */
4914                         printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4915                                 j + 1, (ulong)cy_pci_phys2,
4916                                 (ulong) (cy_pci_phys2 + CyPCI_Ywin - 1),
4917                                 (int)cy_pci_irq);
4918                         printk("%d channels starting from port %d.\n",
4919                                 cy_pci_nchan, cy_next_channel);
4920
4921                         cy_next_channel += cy_pci_nchan;
4922                 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4923                         /* print message */
4924                         printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4925                                 pdev->bus->number, pdev->devfn);
4926                         printk("rev_id=%d) IRQ%d\n",
4927                                 cyy_rev_id, (int)cy_pci_irq);
4928                         printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4929                                 "ctladdr=0x%lx\n",
4930                                 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4931                         printk("Cyclades-Z/PCI not supported for low "
4932                                 "addresses\n");
4933                         break;
4934                 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
4935 #ifdef CY_PCI_DEBUG
4936                         printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4937                                 pdev->bus->number, pdev->devfn);
4938                         printk("rev_id=%d) IRQ%d\n",
4939                                 cyy_rev_id, (int)cy_pci_irq);
4940                         printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4941                                 "ctladdr=0x%lx\n",
4942                                 (ulong) cy_pci_phys2, (ulong) cy_pci_phys0);
4943 #endif
4944                         cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl);
4945
4946                         /* Disable interrupts on the PLX before resetting it */
4947                         cy_writew(cy_pci_addr0 + 0x68,
4948                                 cy_readw(cy_pci_addr0 + 0x68) & ~0x0900);
4949
4950                         plx_init(cy_pci_addr0, 0x6c);
4951                         /* For some yet unknown reason, once the PLX9060 reloads
4952                            the EEPROM, the IRQ is lost and, thus, we have to
4953                            re-write it to the PCI config. registers.
4954                            This will remain here until we find a permanent
4955                            fix. */
4956                         pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4957                                                 cy_pci_irq);
4958
4959                         mailbox =
4960                             (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
4961                                                 cy_pci_addr0)->mail_box_0);
4962
4963                         if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4964                                 printk("  Warning: PCI I/O bit incorrectly "
4965                                         "set. Ignoring it...\n");
4966                                 pdev->resource[2].flags &= ~IORESOURCE_IO;
4967                         }
4968
4969                         /* Although we don't use this I/O region, we should
4970                            request it from the kernel anyway, to avoid problems
4971                            with other drivers accessing it. */
4972                         if (pci_request_regions(pdev, "Cyclades-Z") != 0) {
4973                                 printk(KERN_ERR "cyclades: failed to reserve "
4974                                         "PCI resources\n");
4975                                 continue;
4976                         }
4977
4978                         if (mailbox == ZE_V1) {
4979                                 cy_pci_addr2 = ioremap(cy_pci_phys2,
4980                                                 CyPCI_Ze_win);
4981                                 if (ZeIndex == NR_CARDS) {
4982                                         printk("Cyclades-Ze/PCI found at "
4983                                                 "0x%lx but no more cards can "
4984                                                 "be used.\nChange NR_CARDS in "
4985                                                 "cyclades.c and recompile "
4986                                                 "kernel.\n",
4987                                                 (ulong)cy_pci_phys2);
4988                                 } else {
4989                                         Ze_phys0[ZeIndex] = cy_pci_phys0;
4990                                         Ze_phys2[ZeIndex] = cy_pci_phys2;
4991                                         Ze_addr0[ZeIndex] = cy_pci_addr0;
4992                                         Ze_addr2[ZeIndex] = cy_pci_addr2;
4993                                         Ze_irq[ZeIndex] = cy_pci_irq;
4994                                         Ze_pdev[ZeIndex] = pdev;
4995                                         ZeIndex++;
4996                                 }
4997                                 i--;
4998                                 continue;
4999                         } else {
5000                                 cy_pci_addr2 = ioremap(cy_pci_phys2,CyPCI_Zwin);
5001                         }
5002
5003 #ifdef CY_PCI_DEBUG
5004                         printk("Cyclades-Z/PCI: relocate winaddr=0x%lx "
5005                                 "ctladdr=0x%lx\n",
5006                                 (ulong) cy_pci_addr2, (ulong) cy_pci_addr0);
5007                         if (mailbox == ZO_V1) {
5008                                 cy_writel(&((struct RUNTIME_9060 *)
5009                                         (cy_pci_addr0))->loc_addr_base,
5010                                         WIN_CREG);
5011                                 PAUSE;
5012                                 printk("Cyclades-8Zo/PCI: FPGA id %lx, ver "
5013                                         "%lx\n", (ulong) (0xff &
5014                                         cy_readl(&((struct CUSTOM_REG *)
5015                                                 (cy_pci_addr2))->fpga_id)),
5016                                         (ulong)(0xff &
5017                                         cy_readl(&((struct CUSTOM_REG *)
5018                                                 (cy_pci_addr2))->
5019                                                         fpga_version)));
5020                                 cy_writel(&((struct RUNTIME_9060 *)
5021                                         (cy_pci_addr0))->loc_addr_base,
5022                                         WIN_RAM);
5023                         } else {
5024                                 printk("Cyclades-Z/PCI: New Cyclades-Z board.  "
5025                                                 "FPGA not loaded\n");
5026                         }
5027 #endif
5028                         /* The following clears the firmware id word.  This
5029                            ensures that the driver will not attempt to talk to
5030                            the board until it has been properly initialized.
5031                          */
5032                         PAUSE;
5033                         if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5034                                 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5035
5036                         /* This must be a Cyclades-8Zo/PCI.  The extendable
5037                            version will have a different device_id and will
5038                            be allocated its maximum number of ports. */
5039                         cy_pci_nchan = 8;
5040
5041                         if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5042                                 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5043                                         "no channels are available.\nChange "
5044                                         "NR_PORTS in cyclades.c and recompile "
5045                                         "kernel.\n", (ulong)cy_pci_phys2);
5046                                 return i;
5047                         }
5048
5049                         /* fill the next cy_card structure available */
5050                         for (j = 0; j < NR_CARDS; j++) {
5051                                 if (cy_card[j].base_addr == 0)
5052                                         break;
5053                         }
5054                         if (j == NR_CARDS) {    /* no more cy_cards available */
5055                                 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5056                                         "no more cards can be used.\nChange "
5057                                         "NR_CARDS in cyclades.c and recompile "
5058                                         "kernel.\n", (ulong)cy_pci_phys2);
5059                                 return i;
5060                         }
5061 #ifdef CONFIG_CYZ_INTR
5062                         /* allocate IRQ only if board has an IRQ */
5063                         if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5064                                 if (request_irq(cy_pci_irq, cyz_interrupt,
5065                                                 IRQF_SHARED, "Cyclades-Z",
5066                                                 &cy_card[j])) {
5067                                         printk("Cyclom-8Zo/PCI found at 0x%lx "
5068                                                 "but could not allocate "
5069                                                 "IRQ%d.\n", (ulong)cy_pci_phys2,
5070                                                 cy_pci_irq);
5071                                         return i;
5072                                 }
5073                         }
5074 #endif                          /* CONFIG_CYZ_INTR */
5075
5076                         /* set cy_card */
5077                         cy_card[j].base_phys = cy_pci_phys2;
5078                         cy_card[j].ctl_phys = cy_pci_phys0;
5079                         cy_card[j].base_addr = cy_pci_addr2;
5080                         cy_card[j].ctl_addr = cy_pci_addr0;
5081                         cy_card[j].irq = (int)cy_pci_irq;
5082                         cy_card[j].bus_index = 1;
5083                         cy_card[j].first_line = cy_next_channel;
5084                         cy_card[j].num_chips = -1;
5085                         cy_card[j].pdev = pdev;
5086
5087                         /* print message */
5088 #ifdef CONFIG_CYZ_INTR
5089                         /* don't report IRQ if board is no IRQ */
5090                         if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5091                                 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, "
5092                                         "IRQ%d, ", j + 1, (ulong)cy_pci_phys2,
5093                                         (ulong) (cy_pci_phys2 + CyPCI_Zwin - 1),
5094                                         (int)cy_pci_irq);
5095                         else
5096 #endif                          /* CONFIG_CYZ_INTR */
5097                                 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
5098                                         j + 1, (ulong)cy_pci_phys2,
5099                                         (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
5100
5101                         printk("%d channels starting from port %d.\n",
5102                                         cy_pci_nchan, cy_next_channel);
5103                         cy_next_channel += cy_pci_nchan;
5104                 }
5105         }
5106
5107         for (; ZeIndex != 0 && i < NR_CARDS; i++) {
5108                 cy_pci_phys0 = Ze_phys0[0];
5109                 cy_pci_phys2 = Ze_phys2[0];
5110                 cy_pci_addr0 = Ze_addr0[0];
5111                 cy_pci_addr2 = Ze_addr2[0];
5112                 cy_pci_irq = Ze_irq[0];
5113                 pdev = Ze_pdev[0];
5114                 for (j = 0; j < ZeIndex - 1; j++) {
5115                         Ze_phys0[j] = Ze_phys0[j + 1];
5116                         Ze_phys2[j] = Ze_phys2[j + 1];
5117                         Ze_addr0[j] = Ze_addr0[j + 1];
5118                         Ze_addr2[j] = Ze_addr2[j + 1];
5119                         Ze_irq[j] = Ze_irq[j + 1];
5120                         Ze_pdev[j] = Ze_pdev[j + 1];
5121                 }
5122                 ZeIndex--;
5123                 mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
5124                                                 cy_pci_addr0)->mail_box_0);
5125 #ifdef CY_PCI_DEBUG
5126                 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
5127                         (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
5128                 printk("Cyclades-Z/PCI: New Cyclades-Z board.  FPGA not "
5129                                 "loaded\n");
5130 #endif
5131                 PAUSE;
5132                 /* This must be the new Cyclades-Ze/PCI. */
5133                 cy_pci_nchan = ZE_V1_NPORTS;
5134
5135                 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5136                         printk("Cyclades-Ze/PCI found at 0x%lx but no channels "
5137                                 "are available.\nChange NR_PORTS in cyclades.c "
5138                                 "and recompile kernel.\n",
5139                                 (ulong) cy_pci_phys2);
5140                         return i;
5141                 }
5142
5143                 /* fill the next cy_card structure available */
5144                 for (j = 0; j < NR_CARDS; j++) {
5145                         if (cy_card[j].base_addr == 0)
5146                                 break;
5147                 }
5148                 if (j == NR_CARDS) {    /* no more cy_cards available */
5149                         printk("Cyclades-Ze/PCI found at 0x%lx but no more "
5150                                 "cards can be used.\nChange NR_CARDS in "
5151                                 "cyclades.c and recompile kernel.\n",
5152                                 (ulong) cy_pci_phys2);
5153                         return i;
5154                 }
5155 #ifdef CONFIG_CYZ_INTR
5156                 /* allocate IRQ only if board has an IRQ */
5157                 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5158                         if (request_irq(cy_pci_irq, cyz_interrupt,
5159                                         IRQF_SHARED, "Cyclades-Z",
5160                                         &cy_card[j])) {
5161                                 printk("Cyclom-Ze/PCI found at 0x%lx ",
5162                                         (ulong) cy_pci_phys2);
5163                                 printk("but could not allocate IRQ%d.\n",
5164                                         cy_pci_irq);
5165                                 return i;
5166                         }
5167                 }
5168 #endif                          /* CONFIG_CYZ_INTR */
5169
5170                 /* set cy_card */
5171                 cy_card[j].base_phys = cy_pci_phys2;
5172                 cy_card[j].ctl_phys = cy_pci_phys0;
5173                 cy_card[j].base_addr = cy_pci_addr2;
5174                 cy_card[j].ctl_addr = cy_pci_addr0;
5175                 cy_card[j].irq = (int)cy_pci_irq;
5176                 cy_card[j].bus_index = 1;
5177                 cy_card[j].first_line = cy_next_channel;
5178                 cy_card[j].num_chips = -1;
5179                 cy_card[j].pdev = pdev;
5180
5181                 /* print message */
5182 #ifdef CONFIG_CYZ_INTR
5183                 /* don't report IRQ if board is no IRQ */
5184                 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5185                         printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
5186                                 j + 1, (ulong) cy_pci_phys2,
5187                                 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1),
5188                                 (int)cy_pci_irq);
5189                 else
5190 #endif                          /* CONFIG_CYZ_INTR */
5191                         printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
5192                                 j + 1, (ulong) cy_pci_phys2,
5193                                 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1));
5194
5195                 printk("%d channels starting from port %d.\n",
5196                         cy_pci_nchan, cy_next_channel);
5197                 cy_next_channel += cy_pci_nchan;
5198         }
5199         if (ZeIndex != 0) {
5200                 printk("Cyclades-Ze/PCI found at 0x%x but no more cards can be "
5201                         "used.\nChange NR_CARDS in cyclades.c and recompile "
5202                         "kernel.\n", (unsigned int)Ze_phys2[0]);
5203         }
5204         return i;
5205 #else
5206         return 0;
5207 #endif                          /* ifdef CONFIG_PCI */
5208 }                               /* cy_detect_pci */
5209
5210 /*
5211  * This routine prints out the appropriate serial driver version number
5212  * and identifies which options were configured into this driver.
5213  */
5214 static inline void show_version(void)
5215 {
5216         printk("Cyclades driver " CY_VERSION "\n");
5217         printk("        built %s %s\n", __DATE__, __TIME__);
5218 }                               /* show_version */
5219
5220 static int
5221 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5222                 int *eof, void *data)
5223 {
5224         struct cyclades_port *info;
5225         int i;
5226         int len = 0;
5227         off_t begin = 0;
5228         off_t pos = 0;
5229         int size;
5230         __u32 cur_jifs = jiffies;
5231
5232         size = sprintf(buf, "Dev TimeOpen   BytesOut  IdleOut    BytesIn   "
5233                         "IdleIn  Overruns  Ldisc\n");
5234
5235         pos += size;
5236         len += size;
5237
5238         /* Output one line for each known port */
5239         for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5240                 info = &cy_port[i];
5241
5242                 if (info->count)
5243                         size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5244                                 "%8lu %9lu %6ld\n", info->line,
5245                                 (cur_jifs - info->idle_stats.in_use) / HZ,
5246                                 info->idle_stats.xmit_bytes,
5247                                 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
5248                                 info->idle_stats.recv_bytes,
5249                                 (cur_jifs - info->idle_stats.recv_idle) / HZ,
5250                                 info->idle_stats.overruns,
5251                                 (long)info->tty->ldisc.num);
5252                 else
5253                         size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5254                                 "%8lu %9lu %6ld\n",
5255                                 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5256                 len += size;
5257                 pos = begin + len;
5258
5259                 if (pos < offset) {
5260                         len = 0;
5261                         begin = pos;
5262                 }
5263                 if (pos > offset + length)
5264                         goto done;
5265         }
5266         *eof = 1;
5267 done:
5268         *start = buf + (offset - begin);        /* Start of wanted data */
5269         len -= (offset - begin);        /* Start slop */
5270         if (len > length)
5271                 len = length;   /* Ending slop */
5272         if (len < 0)
5273                 len = 0;
5274         return len;
5275 }
5276
5277 /* The serial driver boot-time initialization code!
5278     Hardware I/O ports are mapped to character special devices on a
5279     first found, first allocated manner.  That is, this code searches
5280     for Cyclom cards in the system.  As each is found, it is probed
5281     to discover how many chips (and thus how many ports) are present.
5282     These ports are mapped to the tty ports 32 and upward in monotonic
5283     fashion.  If an 8-port card is replaced with a 16-port card, the
5284     port mapping on a following card will shift.
5285
5286     This approach is different from what is used in the other serial
5287     device driver because the Cyclom is more properly a multiplexer,
5288     not just an aggregation of serial ports on one card.
5289
5290     If there are more cards with more ports than have been
5291     statically allocated above, a warning is printed and the
5292     extra ports are ignored.
5293  */
5294
5295 static const struct tty_operations cy_ops = {
5296         .open = cy_open,
5297         .close = cy_close,
5298         .write = cy_write,
5299         .put_char = cy_put_char,
5300         .flush_chars = cy_flush_chars,
5301         .write_room = cy_write_room,
5302         .chars_in_buffer = cy_chars_in_buffer,
5303         .flush_buffer = cy_flush_buffer,
5304         .ioctl = cy_ioctl,
5305         .throttle = cy_throttle,
5306         .unthrottle = cy_unthrottle,
5307         .set_termios = cy_set_termios,
5308         .stop = cy_stop,
5309         .start = cy_start,
5310         .hangup = cy_hangup,
5311         .break_ctl = cy_break,
5312         .wait_until_sent = cy_wait_until_sent,
5313         .read_proc = cyclades_get_proc_info,
5314         .tiocmget = cy_tiocmget,
5315         .tiocmset = cy_tiocmset,
5316 };
5317
5318 static int __init cy_init(void)
5319 {
5320         struct cyclades_port *info;
5321         struct cyclades_card *cinfo;
5322         int number_z_boards = 0;
5323         int board, port, i, index;
5324         unsigned long mailbox;
5325         unsigned short chip_number;
5326         int nports;
5327
5328         cy_serial_driver = alloc_tty_driver(NR_PORTS);
5329         if (!cy_serial_driver)
5330                 return -ENOMEM;
5331         show_version();
5332
5333         /* Initialize the tty_driver structure */
5334
5335         cy_serial_driver->owner = THIS_MODULE;
5336         cy_serial_driver->driver_name = "cyclades";
5337         cy_serial_driver->name = "ttyC";
5338         cy_serial_driver->major = CYCLADES_MAJOR;
5339         cy_serial_driver->minor_start = 0;
5340         cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5341         cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5342         cy_serial_driver->init_termios = tty_std_termios;
5343         cy_serial_driver->init_termios.c_cflag =
5344             B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5345         cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
5346         tty_set_operations(cy_serial_driver, &cy_ops);
5347
5348         if (tty_register_driver(cy_serial_driver))
5349                 panic("Couldn't register Cyclades serial driver\n");
5350
5351         for (i = 0; i < NR_CARDS; i++) {
5352                 /* base_addr=0 indicates board not found */
5353                 cy_card[i].base_addr = NULL;
5354         }
5355
5356         /* the code below is responsible to find the boards. Each different
5357            type of board has its own detection routine. If a board is found,
5358            the next cy_card structure available is set by the detection
5359            routine. These functions are responsible for checking the
5360            availability of cy_card and cy_port data structures and updating
5361            the cy_next_channel. */
5362
5363         /* look for isa boards */
5364         cy_isa_nboard = cy_detect_isa();
5365
5366         /* look for pci boards */
5367         cy_pci_nboard = cy_detect_pci();
5368
5369         cy_nboard = cy_isa_nboard + cy_pci_nboard;
5370
5371         /* invalidate remaining cy_card structures */
5372         for (i = 0; i < NR_CARDS; i++) {
5373                 if (cy_card[i].base_addr == 0) {
5374                         cy_card[i].first_line = -1;
5375                         cy_card[i].ctl_addr = NULL;
5376                         cy_card[i].irq = 0;
5377                         cy_card[i].bus_index = 0;
5378                         cy_card[i].first_line = 0;
5379                         cy_card[i].num_chips = 0;
5380                 }
5381         }
5382         /* invalidate remaining cy_port structures */
5383         for (i = cy_next_channel; i < NR_PORTS; i++) {
5384                 cy_port[i].line = -1;
5385                 cy_port[i].magic = -1;
5386         }
5387
5388         /* initialize per-port data structures for each valid board found */
5389         for (board = 0; board < cy_nboard; board++) {
5390                 cinfo = &cy_card[board];
5391                 if (cinfo->num_chips == -1) {   /* Cyclades-Z */
5392                         number_z_boards++;
5393                         mailbox = cy_readl(&((struct RUNTIME_9060 __iomem *)
5394                                              cy_card[board].ctl_addr)->
5395                                            mail_box_0);
5396                         nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
5397                         cinfo->intr_enabled = 0;
5398                         cinfo->nports = 0;      /* Will be correctly set later, after
5399                                                    Z FW is loaded */
5400                         spin_lock_init(&cinfo->card_lock);
5401                         for (port = cinfo->first_line;
5402                              port < cinfo->first_line + nports; port++) {
5403                                 info = &cy_port[port];
5404                                 info->magic = CYCLADES_MAGIC;
5405                                 info->type = PORT_STARTECH;
5406                                 info->card = board;
5407                                 info->line = port;
5408                                 info->chip_rev = 0;
5409                                 info->flags = STD_COM_FLAGS;
5410                                 info->tty = NULL;
5411                                 if (mailbox == ZO_V1)
5412                                         info->xmit_fifo_size = CYZ_FIFO_SIZE;
5413                                 else
5414                                         info->xmit_fifo_size =
5415                                             4 * CYZ_FIFO_SIZE;
5416                                 info->cor1 = 0;
5417                                 info->cor2 = 0;
5418                                 info->cor3 = 0;
5419                                 info->cor4 = 0;
5420                                 info->cor5 = 0;
5421                                 info->tbpr = 0;
5422                                 info->tco = 0;
5423                                 info->rbpr = 0;
5424                                 info->rco = 0;
5425                                 info->custom_divisor = 0;
5426                                 info->close_delay = 5 * HZ / 10;
5427                                 info->closing_wait = CLOSING_WAIT_DELAY;
5428                                 info->icount.cts = info->icount.dsr =
5429                                     info->icount.rng = info->icount.dcd = 0;
5430                                 info->icount.rx = info->icount.tx = 0;
5431                                 info->icount.frame = info->icount.parity = 0;
5432                                 info->icount.overrun = info->icount.brk = 0;
5433                                 info->x_char = 0;
5434                                 info->event = 0;
5435                                 info->count = 0;
5436                                 info->blocked_open = 0;
5437                                 info->default_threshold = 0;
5438                                 info->default_timeout = 0;
5439                                 INIT_WORK(&info->tqueue, do_softint);
5440                                 init_waitqueue_head(&info->open_wait);
5441                                 init_waitqueue_head(&info->close_wait);
5442                                 init_waitqueue_head(&info->shutdown_wait);
5443                                 init_waitqueue_head(&info->delta_msr_wait);
5444                                 /* info->session */
5445                                 /* info->pgrp */
5446                                 info->read_status_mask = 0;
5447                                 /* info->timeout */
5448                                 /* Bentson's vars */
5449                                 info->jiffies[0] = 0;
5450                                 info->jiffies[1] = 0;
5451                                 info->jiffies[2] = 0;
5452                                 info->rflush_count = 0;
5453 #ifdef CONFIG_CYZ_INTR
5454                                 init_timer(&cyz_rx_full_timer[port]);
5455                                 cyz_rx_full_timer[port].function = NULL;
5456 #endif
5457                         }
5458                         continue;
5459                 } else {        /* Cyclom-Y of some kind */
5460                         index = cinfo->bus_index;
5461                         spin_lock_init(&cinfo->card_lock);
5462                         cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
5463                         for (port = cinfo->first_line;
5464                              port < cinfo->first_line + cinfo->nports; port++) {
5465                                 info = &cy_port[port];
5466                                 info->magic = CYCLADES_MAGIC;
5467                                 info->type = PORT_CIRRUS;
5468                                 info->card = board;
5469                                 info->line = port;
5470                                 info->flags = STD_COM_FLAGS;
5471                                 info->tty = NULL;
5472                                 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
5473                                 info->cor1 =
5474                                     CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
5475                                 info->cor2 = CyETC;
5476                                 info->cor3 = 0x08;      /* _very_ small rcv threshold */
5477                                 info->cor4 = 0;
5478                                 info->cor5 = 0;
5479                                 info->custom_divisor = 0;
5480                                 info->close_delay = 5 * HZ / 10;
5481                                 info->closing_wait = CLOSING_WAIT_DELAY;
5482                                 info->icount.cts = info->icount.dsr =
5483                                     info->icount.rng = info->icount.dcd = 0;
5484                                 info->icount.rx = info->icount.tx = 0;
5485                                 info->icount.frame = info->icount.parity = 0;
5486                                 info->icount.overrun = info->icount.brk = 0;
5487                                 chip_number = (port - cinfo->first_line) / 4;
5488                                 if ((info->chip_rev =
5489                                      cy_readb(cinfo->base_addr +
5490                                               (cy_chip_offset[chip_number] <<
5491                                                index) + (CyGFRCR << index))) >=
5492                                     CD1400_REV_J) {
5493                                         /* It is a CD1400 rev. J or later */
5494                                         info->tbpr = baud_bpr_60[13];   /* Tx BPR */
5495                                         info->tco = baud_co_60[13];     /* Tx CO */
5496                                         info->rbpr = baud_bpr_60[13];   /* Rx BPR */
5497                                         info->rco = baud_co_60[13];     /* Rx CO */
5498                                         info->rflow = 0;
5499                                         info->rtsdtr_inv = 1;
5500                                 } else {
5501                                         info->tbpr = baud_bpr_25[13];   /* Tx BPR */
5502                                         info->tco = baud_co_25[13];     /* Tx CO */
5503                                         info->rbpr = baud_bpr_25[13];   /* Rx BPR */
5504                                         info->rco = baud_co_25[13];     /* Rx CO */
5505                                         info->rflow = 0;
5506                                         info->rtsdtr_inv = 0;
5507                                 }
5508                                 info->x_char = 0;
5509                                 info->event = 0;
5510                                 info->count = 0;
5511                                 info->blocked_open = 0;
5512                                 info->default_threshold = 0;
5513                                 info->default_timeout = 0;
5514                                 INIT_WORK(&info->tqueue, do_softint);
5515                                 init_waitqueue_head(&info->open_wait);
5516                                 init_waitqueue_head(&info->close_wait);
5517                                 init_waitqueue_head(&info->shutdown_wait);
5518                                 init_waitqueue_head(&info->delta_msr_wait);
5519                                 /* info->session */
5520                                 /* info->pgrp */
5521                                 info->read_status_mask =
5522                                     CyTIMEOUT | CySPECHAR | CyBREAK
5523                                     | CyPARITY | CyFRAME | CyOVERRUN;
5524                                 /* info->timeout */
5525                         }
5526                 }
5527         }
5528
5529 #ifndef CONFIG_CYZ_INTR
5530         if (number_z_boards && !cyz_timeron) {
5531                 cyz_timeron++;
5532                 cyz_timerlist.expires = jiffies + 1;
5533                 add_timer(&cyz_timerlist);
5534 #ifdef CY_PCI_DEBUG
5535                 printk("Cyclades-Z polling initialized\n");
5536 #endif
5537         }
5538 #endif                          /* CONFIG_CYZ_INTR */
5539
5540         return 0;
5541
5542 }                               /* cy_init */
5543
5544 static void __exit cy_cleanup_module(void)
5545 {
5546         int i, e1;
5547
5548 #ifndef CONFIG_CYZ_INTR
5549         if (cyz_timeron){
5550                 cyz_timeron = 0;
5551                 del_timer(&cyz_timerlist);
5552         }
5553 #endif /* CONFIG_CYZ_INTR */
5554
5555         if ((e1 = tty_unregister_driver(cy_serial_driver)))
5556                 printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
5557                         e1);
5558
5559         put_tty_driver(cy_serial_driver);
5560
5561         for (i = 0; i < NR_CARDS; i++) {
5562                 if (cy_card[i].base_addr) {
5563                         iounmap(cy_card[i].base_addr);
5564                         if (cy_card[i].ctl_addr)
5565                                 iounmap(cy_card[i].ctl_addr);
5566                         if (cy_card[i].irq
5567 #ifndef CONFIG_CYZ_INTR
5568                                 && cy_card[i].num_chips != -1 /* not a Z card */
5569 #endif /* CONFIG_CYZ_INTR */
5570                                 )
5571                                 free_irq(cy_card[i].irq, &cy_card[i]);
5572 #ifdef CONFIG_PCI
5573                         if (cy_card[i].pdev)
5574                                 pci_release_regions(cy_card[i].pdev);
5575 #endif
5576                 }
5577         }
5578 } /* cy_cleanup_module */
5579
5580 module_init(cy_init);
5581 module_exit(cy_cleanup_module);
5582
5583 MODULE_LICENSE("GPL");