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 /*
 628  * Include section
 629  */
 630 #include <linux/module.h>
 631 #include <linux/errno.h>
 632 #include <linux/signal.h>
 633 #include <linux/sched.h>
 634 #include <linux/timer.h>
 635 #include <linux/interrupt.h>
 636 #include <linux/tty.h>
 637 #include <linux/tty_flip.h>
 638 #include <linux/serial.h>
 639 #include <linux/major.h>
 640 #include <linux/string.h>
 641 #include <linux/fcntl.h>
 642 #include <linux/ptrace.h>
 643 #include <linux/cyclades.h>
 644 #include <linux/mm.h>
 645 #include <linux/ioport.h>
 646 #include <linux/init.h>
 647 #include <linux/delay.h>
 648 #include <linux/spinlock.h>
 649 #include <linux/bitops.h>
 650
 651 #include <asm/system.h>
 652 #include <asm/io.h>
 653 #include <asm/irq.h>
 654 #include <asm/uaccess.h>
 655
 656 #define CY_LOCK(info,flags)                                     \
 657                 do {                                            \
 658                 spin_lock_irqsave(&info->card->card_lock, flags); \
 659                 } while (0)
 660
 661 #define CY_UNLOCK(info,flags)                                   \
 662                 do {                                            \
 663                 spin_unlock_irqrestore(&info->card->card_lock, flags); \
 664                 } while (0)
 665
 666 #include <linux/kernel.h>
 667 #include <linux/pci.h>
 668
 669 #include <linux/stat.h>
 670 #include <linux/proc_fs.h>
 671
 672 static void cy_throttle(struct tty_struct *tty);
 673 static void cy_send_xchar(struct tty_struct *tty, char ch);
 674
 675 #define IS_CYC_Z(card) ((card).num_chips == -1)
 676
 677 #define Z_FPGA_CHECK(card) \
 678         ((readl(&((struct RUNTIME_9060 __iomem *) \
 679                 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
 680
 681 #define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
 682                         ((card).ctl_addr))->mail_box_0)) || \
 683                         Z_FPGA_CHECK(card)) && \
 684                         (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
 685                         ((card).base_addr+ID_ADDRESS))->signature)))
 686
 687 #ifndef SERIAL_XMIT_SIZE
 688 #define SERIAL_XMIT_SIZE        (min(PAGE_SIZE, 4096))
 689 #endif
 690 #define WAKEUP_CHARS            256
 691
 692 #define STD_COM_FLAGS (0)
 693
 694 static struct tty_driver *cy_serial_driver;
 695
 696 #ifdef CONFIG_ISA
 697 /* This is the address lookup table. The driver will probe for
 698    Cyclom-Y/ISA boards at all addresses in here. If you want the
 699    driver to probe addresses at a different address, add it to
 700    this table.  If the driver is probing some other board and
 701    causing problems, remove the offending address from this table.
 702    The cy_setup function extracts additional addresses from the
 703    boot options line.  The form is "cyclades=address,address..."
 704 */
 705
 706 static unsigned int cy_isa_addresses[] = {
 707         0xD0000,
 708         0xD2000,
 709         0xD4000,
 710         0xD6000,
 711         0xD8000,
 712         0xDA000,
 713         0xDC000,
 714         0xDE000,
 715         0, 0, 0, 0, 0, 0, 0, 0
 716 };
 717
 718 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
 719
 720 #ifdef MODULE
 721 static long maddr[NR_CARDS];
 722 static int irq[NR_CARDS];
 723
 724 module_param_array(maddr, long, NULL, 0);
 725 module_param_array(irq, int, NULL, 0);
 726 #endif
 727
 728 #endif                          /* CONFIG_ISA */
 729
 730 /* This is the per-card data structure containing address, irq, number of
 731    channels, etc. This driver supports a maximum of NR_CARDS cards.
 732 */
 733 static struct cyclades_card cy_card[NR_CARDS];
 734
 735 /* This is the per-channel data structure containing pointers, flags
 736  and variables for the port. This driver supports a maximum of NR_PORTS.
 737 */
 738 static struct cyclades_port cy_port[NR_PORTS];
 739
 740 static int cy_next_channel;     /* next minor available */
 741
 742 /*
 743  * This is used to look up the divisor speeds and the timeouts
 744  * We're normally limited to 15 distinct baud rates.  The extra
 745  * are accessed via settings in info->flags.
 746  *      0,     1,     2,     3,     4,     5,     6,     7,     8,     9,
 747  *     10,    11,    12,    13,    14,    15,    16,    17,    18,    19,
 748  *                                               HI            VHI
 749  *     20
 750  */
 751 static int baud_table[] = {
 752         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
 753         1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
 754         230400, 0
 755 };
 756
 757 static char baud_co_25[] = {    /* 25 MHz clock option table */
 758         /* value =>    00    01   02    03    04 */
 759         /* divide by    8    32   128   512  2048 */
 760         0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
 761         0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 762 };
 763
 764 static char baud_bpr_25[] = {   /* 25 MHz baud rate period table */
 765         0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
 766         0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
 767 };
 768
 769 static char baud_co_60[] = {    /* 60 MHz clock option table (CD1400 J) */
 770         /* value =>    00    01   02    03    04 */
 771         /* divide by    8    32   128   512  2048 */
 772         0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
 773         0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
 774         0x00
 775 };
 776
 777 static char baud_bpr_60[] = {   /* 60 MHz baud rate period table (CD1400 J) */
 778         0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
 779         0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
 780         0x21
 781 };
 782
 783 static char baud_cor3[] = {     /* receive threshold */
 784         0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
 785         0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
 786         0x07
 787 };
 788
 789 /*
 790  * The Cyclades driver implements HW flow control as any serial driver.
 791  * The cyclades_port structure member rflow and the vector rflow_thr
 792  * allows us to take advantage of a special feature in the CD1400 to avoid
 793  * data loss even when the system interrupt latency is too high. These flags
 794  * are to be used only with very special applications. Setting these flags
 795  * requires the use of a special cable (DTR and RTS reversed). In the new
 796  * CD1400-based boards (rev. 6.00 or later), there is no need for special
 797  * cables.
 798  */
 799
 800 static char rflow_thr[] = {     /* rflow threshold */
 801         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 802         0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
 803         0x0a
 804 };
 805
 806 /*  The Cyclom-Ye has placed the sequential chips in non-sequential
 807  *  address order.  This look-up table overcomes that problem.
 808  */
 809 static int cy_chip_offset[] = { 0x0000,
 810         0x0400,
 811         0x0800,
 812         0x0C00,
 813         0x0200,
 814         0x0600,
 815         0x0A00,
 816         0x0E00
 817 };
 818
 819 /* PCI related definitions */
 820
 821 #ifdef CONFIG_PCI
 822 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
 823         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },      /* PCI < 1Mb */
 824         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },      /* PCI > 1Mb */
 825         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },     /* 4Y PCI < 1Mb */
 826         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },     /* 4Y PCI > 1Mb */
 827         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },     /* 8Y PCI < 1Mb */
 828         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },     /* 8Y PCI > 1Mb */
 829         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },      /* Z PCI < 1Mb */
 830         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },      /* Z PCI > 1Mb */
 831         { }                     /* end of table */
 832 };
 833 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
 834 #endif
 835
 836 static void cy_start(struct tty_struct *);
 837 static void set_line_char(struct cyclades_port *);
 838 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
 839 #ifdef CONFIG_ISA
 840 static unsigned detect_isa_irq(void __iomem *);
 841 #endif                          /* CONFIG_ISA */
 842
 843 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
 844
 845 #ifndef CONFIG_CYZ_INTR
 846 static void cyz_poll(unsigned long);
 847
 848 /* The Cyclades-Z polling cycle is defined by this variable */
 849 static long cyz_polling_cycle = CZ_DEF_POLL;
 850
 851 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
 852
 853 #else                           /* CONFIG_CYZ_INTR */
 854 static void cyz_rx_restart(unsigned long);
 855 static struct timer_list cyz_rx_full_timer[NR_PORTS];
 856 #endif                          /* CONFIG_CYZ_INTR */
 857
 858 static inline int serial_paranoia_check(struct cyclades_port *info,
 859                 char *name, const char *routine)
 860 {
 861 #ifdef SERIAL_PARANOIA_CHECK
 862         if (!info) {
 863                 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
 864                                 "in %s\n", name, routine);
 865                 return 1;
 866         }
 867
 868         if ((long)info < (long)(&cy_port[0]) ||
 869                         (long)(&cy_port[NR_PORTS]) < (long)info) {
 870                 printk(KERN_WARNING "cyc Warning: cyclades_port out of range "
 871                                 "for (%s) in %s\n", name, routine);
 872                 return 1;
 873         }
 874
 875         if (info->magic != CYCLADES_MAGIC) {
 876                 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
 877                                 "struct (%s) in %s\n", name, routine);
 878                 return 1;
 879         }
 880 #endif
 881         return 0;
 882 }                               /* serial_paranoia_check */
 883
 884 /*
 885  * This routine is used by the interrupt handler to schedule
 886  * processing in the software interrupt portion of the driver
 887  * (also known as the "bottom half").  This can be called any
 888  * number of times for any channel without harm.
 889  */
 890 static inline void cy_sched_event(struct cyclades_port *info, int event)
 891 {
 892         info->event |= 1 << event; /* remember what kind of event and who */
 893         schedule_work(&info->tqueue);
 894 }                               /* cy_sched_event */
 895
 896 /*
 897  * This routine is used to handle the "bottom half" processing for the
 898  * serial driver, known also the "software interrupt" processing.
 899  * This processing is done at the kernel interrupt level, after the
 900  * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON.  This
 901  * is where time-consuming activities which can not be done in the
 902  * interrupt driver proper are done; the interrupt driver schedules
 903  * them using cy_sched_event(), and they get done here.
 904  *
 905  * This is done through one level of indirection--the task queue.
 906  * When a hardware interrupt service routine wants service by the
 907  * driver's bottom half, it enqueues the appropriate tq_struct (one
 908  * per port) to the keventd work queue and sets a request flag
 909  * that the work queue be processed.
 910  *
 911  * Although this may seem unwieldy, it gives the system a way to
 912  * pass an argument (in this case the pointer to the cyclades_port
 913  * structure) to the bottom half of the driver.  Previous kernels
 914  * had to poll every port to see if that port needed servicing.
 915  */
 916 static void
 917 do_softint(struct work_struct *work)
 918 {
 919         struct cyclades_port *info =
 920                 container_of(work, struct cyclades_port, tqueue);
 921         struct tty_struct    *tty;
 922
 923         tty = info->tty;
 924         if (!tty)
 925                 return;
 926
 927         if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
 928                 tty_hangup(info->tty);
 929                 wake_up_interruptible(&info->open_wait);
 930                         info->flags &= ~ASYNC_NORMAL_ACTIVE;
 931         }
 932         if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
 933                 wake_up_interruptible(&info->open_wait);
 934 #ifdef CONFIG_CYZ_INTR
 935         if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event) &&
 936                         !timer_pending(&cyz_rx_full_timer[info->line]))
 937                 mod_timer(&cyz_rx_full_timer[info->line], jiffies + 1);
 938 #endif
 939         if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
 940                 wake_up_interruptible(&info->delta_msr_wait);
 941         tty_wakeup(tty);
 942 #ifdef Z_WAKE
 943         if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
 944                 complete(&info->shutdown_wait);
 945 #endif
 946 } /* do_softint */
 947
 948
 949 /***********************************************************/
 950 /********* Start of block of Cyclom-Y specific code ********/
 951
 952 /* This routine waits up to 1000 micro-seconds for the previous
 953    command to the Cirrus chip to complete and then issues the
 954    new command.  An error is returned if the previous command
 955    didn't finish within the time limit.
 956
 957    This function is only called from inside spinlock-protected code.
 958  */
 959 static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
 960 {
 961         unsigned int i;
 962
 963         /* Check to see that the previous command has completed */
 964         for (i = 0; i < 100; i++) {
 965                 if (readb(base_addr + (CyCCR << index)) == 0) {
 966                         break;
 967                 }
 968                 udelay(10L);
 969         }
 970         /* if the CCR never cleared, the previous command
 971            didn't finish within the "reasonable time" */
 972         if (i == 100)
 973                 return -1;
 974
 975         /* Issue the new command */
 976         cy_writeb(base_addr + (CyCCR << index), cmd);
 977
 978         return 0;
 979 }                               /* cyy_issue_cmd */
 980
 981 #ifdef CONFIG_ISA
 982 /* ISA interrupt detection code */
 983 static unsigned detect_isa_irq(void __iomem * address)
 984 {
 985         int irq;
 986         unsigned long irqs, flags;
 987         int save_xir, save_car;
 988         int index = 0;          /* IRQ probing is only for ISA */
 989
 990         /* forget possible initially masked and pending IRQ */
 991         irq = probe_irq_off(probe_irq_on());
 992
 993         /* Clear interrupts on the board first */
 994         cy_writeb(address + (Cy_ClrIntr << index), 0);
 995         /* Cy_ClrIntr is 0x1800 */
 996
 997         irqs = probe_irq_on();
 998         /* Wait ... */
 999         udelay(5000L);
1000
1001         /* Enable the Tx interrupts on the CD1400 */
1002         local_irq_save(flags);
1003         cy_writeb(address + (CyCAR << index), 0);
1004         cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1005
1006         cy_writeb(address + (CyCAR << index), 0);
1007         cy_writeb(address + (CySRER << index),
1008                   readb(address + (CySRER << index)) | CyTxRdy);
1009         local_irq_restore(flags);
1010
1011         /* Wait ... */
1012         udelay(5000L);
1013
1014         /* Check which interrupt is in use */
1015         irq = probe_irq_off(irqs);
1016
1017         /* Clean up */
1018         save_xir = (u_char) readb(address + (CyTIR << index));
1019         save_car = readb(address + (CyCAR << index));
1020         cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1021         cy_writeb(address + (CySRER << index),
1022                   readb(address + (CySRER << index)) & ~CyTxRdy);
1023         cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1024         cy_writeb(address + (CyCAR << index), (save_car));
1025         cy_writeb(address + (Cy_ClrIntr << index), 0);
1026         /* Cy_ClrIntr is 0x1800 */
1027
1028         return (irq > 0) ? irq : 0;
1029 }
1030 #endif                          /* CONFIG_ISA */
1031
1032 static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1033                         void __iomem * base_addr, int status, int index)
1034 {
1035         struct cyclades_port *info;
1036         struct tty_struct *tty;
1037         int char_count;
1038         int i, j, len, mdm_change, mdm_status, outch;
1039         int save_xir, channel, save_car;
1040         char data;
1041
1042         if (status & CySRReceive) {     /* reception interrupt */
1043 #ifdef CY_DEBUG_INTERRUPTS
1044                 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
1045 #endif
1046                 /* determine the channel & change to that context */
1047                 spin_lock(&cinfo->card_lock);
1048                 save_xir = (u_char) readb(base_addr + (CyRIR << index));
1049                 channel = (u_short) (save_xir & CyIRChannel);
1050                 i = channel + chip * 4 + cinfo->first_line;
1051                 info = &cy_port[i];
1052                 save_car = readb(base_addr + (CyCAR << index));
1053                 cy_writeb(base_addr + (CyCAR << index), save_xir);
1054
1055                 /* if there is nowhere to put the data, discard it */
1056                 if (info->tty == 0) {
1057                         j = (readb(base_addr + (CyRIVR << index)) &
1058                                 CyIVRMask);
1059                         if (j == CyIVRRxEx) {   /* exception */
1060                                 data = readb(base_addr + (CyRDSR << index));
1061                         } else {        /* normal character reception */
1062                                 char_count = readb(base_addr +
1063                                                 (CyRDCR << index));
1064                                 while (char_count--) {
1065                                         data = readb(base_addr +
1066                                                 (CyRDSR << index));
1067                                 }
1068                         }
1069                 } else {        /* there is an open port for this data */
1070                         tty = info->tty;
1071                         j = (readb(base_addr + (CyRIVR << index)) &
1072                                         CyIVRMask);
1073                         if (j == CyIVRRxEx) {   /* exception */
1074                                 data = readb(base_addr + (CyRDSR << index));
1075
1076                                 /* For statistics only */
1077                                 if (data & CyBREAK)
1078                                         info->icount.brk++;
1079                                 else if (data & CyFRAME)
1080                                         info->icount.frame++;
1081                                 else if (data & CyPARITY)
1082                                         info->icount.parity++;
1083                                 else if (data & CyOVERRUN)
1084                                         info->icount.overrun++;
1085
1086                                 if (data & info->ignore_status_mask) {
1087                                         info->icount.rx++;
1088                                         return;
1089                                 }
1090                                 if (tty_buffer_request_room(tty, 1)) {
1091                                         if (data & info->read_status_mask) {
1092                                                 if (data & CyBREAK) {
1093                                                         tty_insert_flip_char(
1094                                                                 tty,
1095                                                                 readb(
1096                                                                 base_addr +
1097                                                                 (CyRDSR <<
1098                                                                         index)),
1099                                                                 TTY_BREAK);
1100                                                         info->icount.rx++;
1101                                                         if (info->flags &
1102                                                             ASYNC_SAK) {
1103                                                                 do_SAK(tty);
1104                                                         }
1105                                                 } else if (data & CyFRAME) {
1106                                                         tty_insert_flip_char(
1107                                                                 tty,
1108                                                                 readb(
1109                                                                 base_addr +
1110                                                                 (CyRDSR <<
1111                                                                         index)),
1112                                                                 TTY_FRAME);
1113                                                         info->icount.rx++;
1114                                                         info->idle_stats.
1115                                                                 frame_errs++;
1116                                                 } else if (data & CyPARITY) {
1117                                                         /* Pieces of seven... */
1118                                                         tty_insert_flip_char(
1119                                                                 tty,
1120                                                                 readb(
1121                                                                 base_addr +
1122                                                                 (CyRDSR <<
1123                                                                         index)),
1124                                                                 TTY_PARITY);
1125                                                         info->icount.rx++;
1126                                                         info->idle_stats.
1127                                                                 parity_errs++;
1128                                                 } else if (data & CyOVERRUN) {
1129                                                         tty_insert_flip_char(
1130                                                                 tty, 0,
1131                                                                 TTY_OVERRUN);
1132                                                         info->icount.rx++;
1133                                                 /* If the flip buffer itself is
1134                                                    overflowing, we still lose
1135                                                    the next incoming character.
1136                                                  */
1137                                                         tty_insert_flip_char(
1138                                                                 tty,
1139                                                                 readb(
1140                                                                 base_addr +
1141                                                                 (CyRDSR <<
1142                                                                         index)),
1143                                                                 TTY_FRAME);
1144                                                         info->icount.rx++;
1145                                                         info->idle_stats.
1146                                                                 overruns++;
1147                                         /* These two conditions may imply */
1148                                         /* a normal read should be done. */
1149                                         /* }else if(data & CyTIMEOUT){ */
1150                                         /* }else if(data & CySPECHAR){ */
1151                                                 } else {
1152                                                         tty_insert_flip_char(
1153                                                                 tty, 0,
1154                                                                 TTY_NORMAL);
1155                                                         info->icount.rx++;
1156                                                 }
1157                                         } else {
1158                                                 tty_insert_flip_char(tty, 0,
1159                                                                 TTY_NORMAL);
1160                                                 info->icount.rx++;
1161                                         }
1162                                 } else {
1163                                         /* there was a software buffer
1164                                            overrun and nothing could be
1165                                            done about it!!! */
1166                                         info->icount.buf_overrun++;
1167                                         info->idle_stats.overruns++;
1168                                 }
1169                         } else {        /* normal character reception */
1170                                 /* load # chars available from the chip */
1171                                 char_count = readb(base_addr +
1172                                                 (CyRDCR << index));
1173
1174 #ifdef CY_ENABLE_MONITORING
1175                                 ++info->mon.int_count;
1176                                 info->mon.char_count += char_count;
1177                                 if (char_count > info->mon.char_max)
1178                                         info->mon.char_max = char_count;
1179                                 info->mon.char_last = char_count;
1180 #endif
1181                                 len = tty_buffer_request_room(tty, char_count);
1182                                 while (len--) {
1183                                         data = readb(base_addr +
1184                                                         (CyRDSR << index));
1185                                         tty_insert_flip_char(tty, data,
1186                                                         TTY_NORMAL);
1187                                         info->idle_stats.recv_bytes++;
1188                                         info->icount.rx++;
1189 #ifdef CY_16Y_HACK
1190                                         udelay(10L);
1191 #endif
1192                                 }
1193                                 info->idle_stats.recv_idle = jiffies;
1194                         }
1195                         tty_schedule_flip(tty);
1196                 }
1197                 /* end of service */
1198                 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1199                 cy_writeb(base_addr + (CyCAR << index), (save_car));
1200                 spin_unlock(&cinfo->card_lock);
1201         }
1202
1203         if (status & CySRTransmit) {    /* transmission interrupt */
1204                 /* Since we only get here when the transmit buffer
1205                    is empty, we know we can always stuff a dozen
1206                    characters. */
1207 #ifdef CY_DEBUG_INTERRUPTS
1208                 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1209 #endif
1210
1211                 /* determine the channel & change to that context */
1212                 spin_lock(&cinfo->card_lock);
1213                 save_xir = (u_char) readb(base_addr + (CyTIR << index));
1214                 channel = (u_short) (save_xir & CyIRChannel);
1215                 i = channel + chip * 4 + cinfo->first_line;
1216                 save_car = readb(base_addr + (CyCAR << index));
1217                 cy_writeb(base_addr + (CyCAR << index), save_xir);
1218
1219                 /* validate the port# (as configured and open) */
1220                 if ((i < 0) || (NR_PORTS <= i)) {
1221                         cy_writeb(base_addr + (CySRER << index),
1222                                   readb(base_addr + (CySRER << index)) &
1223                                   ~CyTxRdy);
1224                         goto txend;
1225                 }
1226                 info = &cy_port[i];
1227                 if (info->tty == 0) {
1228                         cy_writeb(base_addr + (CySRER << index),
1229                                   readb(base_addr + (CySRER << index)) &
1230                                   ~CyTxRdy);
1231                         goto txdone;
1232                 }
1233
1234                 /* load the on-chip space for outbound data */
1235                 char_count = info->xmit_fifo_size;
1236
1237                 if (info->x_char) {     /* send special char */
1238                         outch = info->x_char;
1239                         cy_writeb(base_addr + (CyTDR << index), outch);
1240                         char_count--;
1241                         info->icount.tx++;
1242                         info->x_char = 0;
1243                 }
1244
1245                 if (info->breakon || info->breakoff) {
1246                         if (info->breakon) {
1247                                 cy_writeb(base_addr + (CyTDR << index), 0);
1248                                 cy_writeb(base_addr + (CyTDR << index), 0x81);
1249                                 info->breakon = 0;
1250                                 char_count -= 2;
1251                         }
1252                         if (info->breakoff) {
1253                                 cy_writeb(base_addr + (CyTDR << index), 0);
1254                                 cy_writeb(base_addr + (CyTDR << index), 0x83);
1255                                 info->breakoff = 0;
1256                                 char_count -= 2;
1257                         }
1258                 }
1259
1260                 while (char_count-- > 0) {
1261                         if (!info->xmit_cnt) {
1262                                 if (readb(base_addr + (CySRER << index)) &
1263                                                 CyTxMpty) {
1264                                         cy_writeb(base_addr + (CySRER << index),
1265                                                 readb(base_addr +
1266                                                         (CySRER << index)) &
1267                                                 ~CyTxMpty);
1268                                 } else {
1269                                         cy_writeb(base_addr + (CySRER << index),
1270                                                 (readb(base_addr +
1271                                                         (CySRER << index)) &
1272                                                 ~CyTxRdy) | CyTxMpty);
1273                                 }
1274                                 goto txdone;
1275                         }
1276                         if (info->xmit_buf == 0) {
1277                                 cy_writeb(base_addr + (CySRER << index),
1278                                         readb(base_addr + (CySRER << index)) &
1279                                         ~CyTxRdy);
1280                                 goto txdone;
1281                         }
1282                         if (info->tty->stopped || info->tty->hw_stopped) {
1283                                 cy_writeb(base_addr + (CySRER << index),
1284                                         readb(base_addr + (CySRER << index)) &
1285                                         ~CyTxRdy);
1286                                 goto txdone;
1287                         }
1288                         /* Because the Embedded Transmit Commands have
1289                            been enabled, we must check to see if the
1290                            escape character, NULL, is being sent.  If it
1291                            is, we must ensure that there is room for it
1292                            to be doubled in the output stream.  Therefore
1293                            we no longer advance the pointer when the
1294                            character is fetched, but rather wait until
1295                            after the check for a NULL output character.
1296                            This is necessary because there may not be
1297                            room for the two chars needed to send a NULL.)
1298                          */
1299                         outch = info->xmit_buf[info->xmit_tail];
1300                         if (outch) {
1301                                 info->xmit_cnt--;
1302                                 info->xmit_tail = (info->xmit_tail + 1) &
1303                                                 (SERIAL_XMIT_SIZE - 1);
1304                                 cy_writeb(base_addr + (CyTDR << index), outch);
1305                                 info->icount.tx++;
1306                         } else {
1307                                 if (char_count > 1) {
1308                                         info->xmit_cnt--;
1309                                         info->xmit_tail = (info->xmit_tail + 1)&
1310                                                 (SERIAL_XMIT_SIZE - 1);
1311                                         cy_writeb(base_addr + (CyTDR << index),
1312                                                 outch);
1313                                         cy_writeb(base_addr + (CyTDR << index),
1314                                                 0);
1315                                         info->icount.tx++;
1316                                         char_count--;
1317                                 } else {
1318                                 }
1319                         }
1320                 }
1321
1322 txdone:
1323                 if (info->xmit_cnt < WAKEUP_CHARS) {
1324                         cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1325                 }
1326 txend:
1327                 /* end of service */
1328                 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1329                 cy_writeb(base_addr + (CyCAR << index), (save_car));
1330                 spin_unlock(&cinfo->card_lock);
1331         }
1332
1333         if (status & CySRModem) {       /* modem interrupt */
1334
1335                 /* determine the channel & change to that context */
1336                 spin_lock(&cinfo->card_lock);
1337                 save_xir = (u_char) readb(base_addr + (CyMIR << index));
1338                 channel = (u_short) (save_xir & CyIRChannel);
1339                 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1340                 save_car = readb(base_addr + (CyCAR << index));
1341                 cy_writeb(base_addr + (CyCAR << index), save_xir);
1342
1343                 mdm_change = readb(base_addr + (CyMISR << index));
1344                 mdm_status = readb(base_addr + (CyMSVR1 << index));
1345
1346                 if (info->tty == 0) {   /* no place for data, ignore it */
1347                         ;
1348                 } else {
1349                         if (mdm_change & CyANY_DELTA) {
1350                                 /* For statistics only */
1351                                 if (mdm_change & CyDCD)
1352                                         info->icount.dcd++;
1353                                 if (mdm_change & CyCTS)
1354                                         info->icount.cts++;
1355                                 if (mdm_change & CyDSR)
1356                                         info->icount.dsr++;
1357                                 if (mdm_change & CyRI)
1358                                         info->icount.rng++;
1359
1360                                 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1361                         }
1362
1363                         if ((mdm_change & CyDCD) &&
1364                                         (info->flags & ASYNC_CHECK_CD)) {
1365                                 if (mdm_status & CyDCD) {
1366                                         cy_sched_event(info,
1367                                                         Cy_EVENT_OPEN_WAKEUP);
1368                                 } else {
1369                                         cy_sched_event(info, Cy_EVENT_HANGUP);
1370                                 }
1371                         }
1372                         if ((mdm_change & CyCTS) &&
1373                                         (info->flags & ASYNC_CTS_FLOW)) {
1374                                 if (info->tty->hw_stopped) {
1375                                         if (mdm_status & CyCTS) {
1376                                                 /* cy_start isn't used
1377                                                    because... !!! */
1378                                                 info->tty->hw_stopped = 0;
1379                                                 cy_writeb(base_addr +
1380                                                         (CySRER << index),
1381                                                         readb(base_addr +
1382                                                                 (CySRER <<
1383                                                                         index))|
1384                                                         CyTxRdy);
1385                                                 cy_sched_event(info,
1386                                                         Cy_EVENT_WRITE_WAKEUP);
1387                                         }
1388                                 } else {
1389                                         if (!(mdm_status & CyCTS)) {
1390                                                 /* cy_stop isn't used
1391                                                    because ... !!! */
1392                                                 info->tty->hw_stopped = 1;
1393                                                 cy_writeb(base_addr +
1394                                                         (CySRER << index),
1395                                                         readb(base_addr +
1396                                                                 (CySRER <<
1397                                                                 index)) &
1398                                                         ~CyTxRdy);
1399                                         }
1400                                 }
1401                         }
1402                         if (mdm_change & CyDSR) {
1403                         }
1404                         if (mdm_change & CyRI) {
1405                         }
1406                 }
1407                 /* end of service */
1408                 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1409                 cy_writeb(base_addr + (CyCAR << index), save_car);
1410                 spin_unlock(&cinfo->card_lock);
1411         }
1412 }
1413
1414 /* The real interrupt service routine is called
1415    whenever the card wants its hand held--chars
1416    received, out buffer empty, modem change, etc.
1417  */
1418 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1419 {
1420         int status;
1421         struct cyclades_card *cinfo;
1422         void __iomem *base_addr, *card_base_addr;
1423         int chip;
1424         int index;
1425         int too_many;
1426         int had_work;
1427
1428         if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1429 #ifdef CY_DEBUG_INTERRUPTS
1430                 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
1431 #endif
1432                 return IRQ_NONE;        /* spurious interrupt */
1433         }
1434
1435         card_base_addr = cinfo->base_addr;
1436         index = cinfo->bus_index;
1437
1438         /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1439         if (unlikely(card_base_addr == NULL))
1440                 return IRQ_HANDLED;
1441
1442         /* This loop checks all chips in the card.  Make a note whenever
1443            _any_ chip had some work to do, as this is considered an
1444            indication that there will be more to do.  Only when no chip
1445            has any work does this outermost loop exit.
1446          */
1447         do {
1448                 had_work = 0;
1449                 for (chip = 0; chip < cinfo->num_chips; chip++) {
1450                         base_addr = cinfo->base_addr +
1451                                         (cy_chip_offset[chip] << index);
1452                         too_many = 0;
1453                         while ((status = readb(base_addr +
1454                                                 (CySVRR << index))) != 0x00) {
1455                                 had_work++;
1456                         /* The purpose of the following test is to ensure that
1457                            no chip can monopolize the driver.  This forces the
1458                            chips to be checked in a round-robin fashion (after
1459                            draining each of a bunch (1000) of characters).
1460                          */
1461                                 if (1000 < too_many++) {
1462                                         break;
1463                                 }
1464                                 cyy_intr_chip(cinfo, chip, base_addr, status,
1465                                                 index);
1466                         }
1467                 }
1468         } while (had_work);
1469
1470         /* clear interrupts */
1471         spin_lock(&cinfo->card_lock);
1472         cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1473         /* Cy_ClrIntr is 0x1800 */
1474         spin_unlock(&cinfo->card_lock);
1475         return IRQ_HANDLED;
1476 }                               /* cyy_interrupt */
1477
1478 /***********************************************************/
1479 /********* End of block of Cyclom-Y specific code **********/
1480 /******** Start of block of Cyclades-Z specific code *********/
1481 /***********************************************************/
1482
1483 static int
1484 cyz_fetch_msg(struct cyclades_card *cinfo,
1485                 __u32 * channel, __u8 * cmd, __u32 * param)
1486 {
1487         struct FIRM_ID __iomem *firm_id;
1488         struct ZFW_CTRL __iomem *zfw_ctrl;
1489         struct BOARD_CTRL __iomem *board_ctrl;
1490         unsigned long loc_doorbell;
1491
1492         firm_id = cinfo->base_addr + ID_ADDRESS;
1493         if (!ISZLOADED(*cinfo)) {
1494                 return -1;
1495         }
1496         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1497         board_ctrl = &zfw_ctrl->board_ctrl;
1498
1499         loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1500                                   (cinfo->ctl_addr))->loc_doorbell);
1501         if (loc_doorbell) {
1502                 *cmd = (char)(0xff & loc_doorbell);
1503                 *channel = readl(&board_ctrl->fwcmd_channel);
1504                 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1505                 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1506                           loc_doorbell, 0xffffffff);
1507                 return 1;
1508         }
1509         return 0;
1510 }                               /* cyz_fetch_msg */
1511
1512 static int
1513 cyz_issue_cmd(struct cyclades_card *cinfo,
1514                 __u32 channel, __u8 cmd, __u32 param)
1515 {
1516         struct FIRM_ID __iomem *firm_id;
1517         struct ZFW_CTRL __iomem *zfw_ctrl;
1518         struct BOARD_CTRL __iomem *board_ctrl;
1519         __u32 __iomem *pci_doorbell;
1520         int index;
1521
1522         firm_id = cinfo->base_addr + ID_ADDRESS;
1523         if (!ISZLOADED(*cinfo)) {
1524                 return -1;
1525         }
1526         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1527         board_ctrl = &zfw_ctrl->board_ctrl;
1528
1529         index = 0;
1530         pci_doorbell =
1531             &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1532         while ((readl(pci_doorbell) & 0xff) != 0) {
1533                 if (index++ == 1000) {
1534                         return (int)(readl(pci_doorbell) & 0xff);
1535                 }
1536                 udelay(50L);
1537         }
1538         cy_writel(&board_ctrl->hcmd_channel, channel);
1539         cy_writel(&board_ctrl->hcmd_param, param);
1540         cy_writel(pci_doorbell, (long)cmd);
1541
1542         return 0;
1543 }                               /* cyz_issue_cmd */
1544
1545 static void
1546 cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1547                 struct BUF_CTRL __iomem *buf_ctrl)
1548 {
1549         struct cyclades_card *cinfo = info->card;
1550         struct tty_struct *tty = info->tty;
1551         int char_count;
1552         int len;
1553 #ifdef BLOCKMOVE
1554         unsigned char *buf;
1555 #else
1556         char data;
1557 #endif
1558         __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1559
1560         rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1561         rx_put = readl(&buf_ctrl->rx_put);
1562         rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1563         rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1564         if (rx_put >= rx_get)
1565                 char_count = rx_put - rx_get;
1566         else
1567                 char_count = rx_put - rx_get + rx_bufsize;
1568
1569         if (char_count) {
1570 #ifdef CY_ENABLE_MONITORING
1571                 info->mon.int_count++;
1572                 info->mon.char_count += char_count;
1573                 if (char_count > info->mon.char_max)
1574                         info->mon.char_max = char_count;
1575                 info->mon.char_last = char_count;
1576 #endif
1577                 if (tty == 0) {
1578                         /* flush received characters */
1579                         new_rx_get = (new_rx_get + char_count) &
1580                                         (rx_bufsize - 1);
1581                         info->rflush_count++;
1582                 } else {
1583 #ifdef BLOCKMOVE
1584                 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1585                    for performance, but because of buffer boundaries, there
1586                    may be several steps to the operation */
1587                         while (1) {
1588                                 len = tty_prepare_flip_string(tty, &buf,
1589                                                 char_count);
1590                                 if (!len)
1591                                         break;
1592
1593                                 len = min_t(unsigned int, min(len, char_count),
1594                                                 rx_bufsize - new_rx_get);
1595
1596                                 memcpy_fromio(buf, cinfo->base_addr +
1597                                                 rx_bufaddr + new_rx_get, len);
1598
1599                                 new_rx_get = (new_rx_get + len) &
1600                                                 (rx_bufsize - 1);
1601                                 char_count -= len;
1602                                 info->icount.rx += len;
1603                                 info->idle_stats.recv_bytes += len;
1604                         }
1605 #else
1606                         len = tty_buffer_request_room(tty, char_count);
1607                         while (len--) {
1608                                 data = readb(cinfo->base_addr + rx_bufaddr +
1609                                                 new_rx_get);
1610                                 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1611                                 tty_insert_flip_char(tty, data, TTY_NORMAL);
1612                                 info->idle_stats.recv_bytes++;
1613                                 info->icount.rx++;
1614                         }
1615 #endif
1616 #ifdef CONFIG_CYZ_INTR
1617                 /* Recalculate the number of chars in the RX buffer and issue
1618                    a cmd in case it's higher than the RX high water mark */
1619                         rx_put = readl(&buf_ctrl->rx_put);
1620                         if (rx_put >= rx_get)
1621                                 char_count = rx_put - rx_get;
1622                         else
1623                                 char_count = rx_put - rx_get + rx_bufsize;
1624                         if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
1625                                 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1626                         }
1627 #endif
1628                         info->idle_stats.recv_idle = jiffies;
1629                         tty_schedule_flip(tty);
1630                 }
1631                 /* Update rx_get */
1632                 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1633         }
1634 }
1635
1636 static void
1637 cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1638                 struct BUF_CTRL __iomem *buf_ctrl)
1639 {
1640         struct cyclades_card *cinfo = info->card;
1641         struct tty_struct *tty = info->tty;
1642         char data;
1643         int char_count;
1644 #ifdef BLOCKMOVE
1645         int small_count;
1646 #endif
1647         __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1648
1649         if (info->xmit_cnt <= 0)        /* Nothing to transmit */
1650                 return;
1651
1652         tx_get = readl(&buf_ctrl->tx_get);
1653         tx_put = readl(&buf_ctrl->tx_put);
1654         tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1655         tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1656         if (tx_put >= tx_get)
1657                 char_count = tx_get - tx_put - 1 + tx_bufsize;
1658         else
1659                 char_count = tx_get - tx_put - 1;
1660
1661         if (char_count) {
1662
1663                 if (tty == 0) {
1664                         goto ztxdone;
1665                 }
1666
1667                 if (info->x_char) {     /* send special char */
1668                         data = info->x_char;
1669
1670                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1671                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1672                         info->x_char = 0;
1673                         char_count--;
1674                         info->icount.tx++;
1675                 }
1676 #ifdef BLOCKMOVE
1677                 while (0 < (small_count = min_t(unsigned int,
1678                                 tx_bufsize - tx_put, min_t(unsigned int,
1679                                         (SERIAL_XMIT_SIZE - info->xmit_tail),
1680                                         min_t(unsigned int, info->xmit_cnt,
1681                                                 char_count))))) {
1682
1683                         memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1684                                         tx_put),
1685                                         &info->xmit_buf[info->xmit_tail],
1686                                         small_count);
1687
1688                         tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1689                         char_count -= small_count;
1690                         info->icount.tx += small_count;
1691                         info->xmit_cnt -= small_count;
1692                         info->xmit_tail = (info->xmit_tail + small_count) &
1693                                         (SERIAL_XMIT_SIZE - 1);
1694                 }
1695 #else
1696                 while (info->xmit_cnt && char_count) {
1697                         data = info->xmit_buf[info->xmit_tail];
1698                         info->xmit_cnt--;
1699                         info->xmit_tail = (info->xmit_tail + 1) &
1700                                         (SERIAL_XMIT_SIZE - 1);
1701
1702                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1703                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1704                         char_count--;
1705                         info->icount.tx++;
1706                 }
1707 #endif
1708 ztxdone:
1709                 if (info->xmit_cnt < WAKEUP_CHARS) {
1710                         cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1711                 }
1712                 /* Update tx_put */
1713                 cy_writel(&buf_ctrl->tx_put, tx_put);
1714         }
1715 }
1716
1717 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1718 {
1719         struct tty_struct *tty;
1720         struct cyclades_port *info;
1721         static struct FIRM_ID __iomem *firm_id;
1722         static struct ZFW_CTRL __iomem *zfw_ctrl;
1723         static struct BOARD_CTRL __iomem *board_ctrl;
1724         static struct CH_CTRL __iomem *ch_ctrl;
1725         static struct BUF_CTRL __iomem *buf_ctrl;
1726         __u32 channel;
1727         __u8 cmd;
1728         __u32 param;
1729         __u32 hw_ver, fw_ver;
1730         int special_count;
1731         int delta_count;
1732
1733         firm_id = cinfo->base_addr + ID_ADDRESS;
1734         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1735         board_ctrl = &zfw_ctrl->board_ctrl;
1736         fw_ver = readl(&board_ctrl->fw_version);
1737         hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1738                         mail_box_0);
1739
1740         while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1741                 special_count = 0;
1742                 delta_count = 0;
1743                 info = &cy_port[channel + cinfo->first_line];
1744                 if ((tty = info->tty) == 0) {
1745                         continue;
1746                 }
1747                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1748                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1749
1750                 switch (cmd) {
1751                 case C_CM_PR_ERROR:
1752                         tty_insert_flip_char(tty, 0, TTY_PARITY);
1753                         info->icount.rx++;
1754                         special_count++;
1755                         break;
1756                 case C_CM_FR_ERROR:
1757                         tty_insert_flip_char(tty, 0, TTY_FRAME);
1758                         info->icount.rx++;
1759                         special_count++;
1760                         break;
1761                 case C_CM_RXBRK:
1762                         tty_insert_flip_char(tty, 0, TTY_BREAK);
1763                         info->icount.rx++;
1764                         special_count++;
1765                         break;
1766                 case C_CM_MDCD:
1767                         info->icount.dcd++;
1768                         delta_count++;
1769                         if (info->flags & ASYNC_CHECK_CD) {
1770                                 if ((fw_ver > 241 ? ((u_long) param) :
1771                                                 readl(&ch_ctrl->rs_status)) &
1772                                                 C_RS_DCD) {
1773                                         cy_sched_event(info,
1774                                                         Cy_EVENT_OPEN_WAKEUP);
1775                                 } else {
1776                                         cy_sched_event(info, Cy_EVENT_HANGUP);
1777                                 }
1778                         }
1779                         break;
1780                 case C_CM_MCTS:
1781                         info->icount.cts++;
1782                         delta_count++;
1783                         break;
1784                 case C_CM_MRI:
1785                         info->icount.rng++;
1786                         delta_count++;
1787                         break;
1788                 case C_CM_MDSR:
1789                         info->icount.dsr++;
1790                         delta_count++;
1791                         break;
1792 #ifdef Z_WAKE
1793                 case C_CM_IOCTLW:
1794                         cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1795                         break;
1796 #endif
1797 #ifdef CONFIG_CYZ_INTR
1798                 case C_CM_RXHIWM:
1799                 case C_CM_RXNNDT:
1800                 case C_CM_INTBACK2:
1801                         /* Reception Interrupt */
1802 #ifdef CY_DEBUG_INTERRUPTS
1803                         printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1804                                         "port %ld\n", info->card, channel);
1805 #endif
1806                         cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1807                         break;
1808                 case C_CM_TXBEMPTY:
1809                 case C_CM_TXLOWWM:
1810                 case C_CM_INTBACK:
1811                         /* Transmission Interrupt */
1812 #ifdef CY_DEBUG_INTERRUPTS
1813                         printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1814                                         "port %ld\n", info->card, channel);
1815 #endif
1816                         cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1817                         break;
1818 #endif                          /* CONFIG_CYZ_INTR */
1819                 case C_CM_FATAL:
1820                         /* should do something with this !!! */
1821                         break;
1822                 default:
1823                         break;
1824                 }
1825                 if (delta_count)
1826                         cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1827                 if (special_count)
1828                         tty_schedule_flip(tty);
1829         }
1830 }
1831
1832 #ifdef CONFIG_CYZ_INTR
1833 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1834 {
1835         struct cyclades_card *cinfo;
1836
1837         if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1838 #ifdef CY_DEBUG_INTERRUPTS
1839                 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
1840 #endif
1841                 return IRQ_NONE;        /* spurious interrupt */
1842         }
1843
1844         if (!ISZLOADED(*cinfo)) {
1845 #ifdef CY_DEBUG_INTERRUPTS
1846                 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1847                                 "(IRQ%d).\n", irq);
1848 #endif
1849                 return IRQ_NONE;
1850         }
1851
1852         /* Handle the interrupts */
1853         cyz_handle_cmd(cinfo);
1854
1855         return IRQ_HANDLED;
1856 }                               /* cyz_interrupt */
1857
1858 static void cyz_rx_restart(unsigned long arg)
1859 {
1860         struct cyclades_port *info = (struct cyclades_port *)arg;
1861         struct cyclades_card *card = info->card;
1862         int retval;
1863         __u32 channel = info->line - card->first_line;
1864         unsigned long flags;
1865
1866         CY_LOCK(info, flags);
1867         retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1868         if (retval != 0) {
1869                 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1870                         info->line, retval);
1871         }
1872         CY_UNLOCK(info, flags);
1873 }
1874
1875 #else                           /* CONFIG_CYZ_INTR */
1876
1877 static void cyz_poll(unsigned long arg)
1878 {
1879         struct cyclades_card *cinfo;
1880         struct cyclades_port *info;
1881         struct tty_struct *tty;
1882         static struct FIRM_ID *firm_id;
1883         static struct ZFW_CTRL *zfw_ctrl;
1884         static struct BOARD_CTRL *board_ctrl;
1885         static struct CH_CTRL *ch_ctrl;
1886         static struct BUF_CTRL *buf_ctrl;
1887         unsigned long expires = jiffies + HZ;
1888         int card, port;
1889
1890         for (card = 0; card < NR_CARDS; card++) {
1891                 cinfo = &cy_card[card];
1892
1893                 if (!IS_CYC_Z(*cinfo))
1894                         continue;
1895                 if (!ISZLOADED(*cinfo))
1896                         continue;
1897
1898                 firm_id = cinfo->base_addr + ID_ADDRESS;
1899                 zfw_ctrl = cinfo->base_addr +
1900                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1901                 board_ctrl = &(zfw_ctrl->board_ctrl);
1902
1903         /* Skip first polling cycle to avoid racing conditions with the FW */
1904                 if (!cinfo->intr_enabled) {
1905                         cinfo->nports = (int)readl(&board_ctrl->n_channel);
1906                         cinfo->intr_enabled = 1;
1907                         continue;
1908                 }
1909
1910                 cyz_handle_cmd(cinfo);
1911
1912                 for (port = 0; port < cinfo->nports; port++) {
1913                         info = &cy_port[port + cinfo->first_line];
1914                         tty = info->tty;
1915                         ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1916                         buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1917
1918                         if (!info->throttle)
1919                                 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1920                         cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1921                 }
1922                 /* poll every 'cyz_polling_cycle' period */
1923                 expires = jiffies + cyz_polling_cycle;
1924         }
1925         mod_timer(&cyz_timerlist, expires);
1926 }                               /* cyz_poll */
1927
1928 #endif                          /* CONFIG_CYZ_INTR */
1929
1930 /********** End of block of Cyclades-Z specific code *********/
1931 /***********************************************************/
1932
1933 /* This is called whenever a port becomes active;
1934    interrupts are enabled and DTR & RTS are turned on.
1935  */
1936 static int startup(struct cyclades_port *info)
1937 {
1938         struct cyclades_card *card;
1939         unsigned long flags;
1940         int retval = 0;
1941         void __iomem *base_addr;
1942         int chip, channel, index;
1943         unsigned long page;
1944
1945         card = info->card;
1946         channel = info->line - card->first_line;
1947
1948         page = get_zeroed_page(GFP_KERNEL);
1949         if (!page)
1950                 return -ENOMEM;
1951
1952         CY_LOCK(info, flags);
1953
1954         if (info->flags & ASYNC_INITIALIZED) {
1955                 free_page(page);
1956                 goto errout;
1957         }
1958
1959         if (!info->type) {
1960                 if (info->tty) {
1961                         set_bit(TTY_IO_ERROR, &info->tty->flags);
1962                 }
1963                 free_page(page);
1964                 goto errout;
1965         }
1966
1967         if (info->xmit_buf)
1968                 free_page(page);
1969         else
1970                 info->xmit_buf = (unsigned char *)page;
1971
1972         CY_UNLOCK(info, flags);
1973
1974         set_line_char(info);
1975
1976         if (!IS_CYC_Z(*card)) {
1977                 chip = channel >> 2;
1978                 channel &= 0x03;
1979                 index = card->bus_index;
1980                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1981
1982 #ifdef CY_DEBUG_OPEN
1983                 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1984                                 "base_addr %p\n",
1985                                 card, chip, channel, base_addr);
1986 #endif
1987                 CY_LOCK(info, flags);
1988
1989                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1990
1991                 cy_writeb(base_addr + (CyRTPR << index),
1992                         (info->default_timeout ? info->default_timeout : 0x02));
1993                 /* 10ms rx timeout */
1994
1995                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1996                                 index);
1997
1998                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1999                 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2000                 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
2001
2002 #ifdef CY_DEBUG_DTR
2003                 printk(KERN_DEBUG "cyc:startup raising DTR\n");
2004                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2005                         readb(base_addr + (CyMSVR1 << index)),
2006                         readb(base_addr + (CyMSVR2 << index)));
2007 #endif
2008
2009                 cy_writeb(base_addr + (CySRER << index),
2010                         readb(base_addr + (CySRER << index)) | CyRxData);
2011                 info->flags |= ASYNC_INITIALIZED;
2012
2013                 if (info->tty) {
2014                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
2015                 }
2016                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2017                 info->breakon = info->breakoff = 0;
2018                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2019                 info->idle_stats.in_use =
2020                 info->idle_stats.recv_idle =
2021                 info->idle_stats.xmit_idle = jiffies;
2022
2023                 CY_UNLOCK(info, flags);
2024
2025         } else {
2026                 struct FIRM_ID __iomem *firm_id;
2027                 struct ZFW_CTRL __iomem *zfw_ctrl;
2028                 struct BOARD_CTRL __iomem *board_ctrl;
2029                 struct CH_CTRL __iomem *ch_ctrl;
2030                 int retval;
2031
2032                 base_addr = card->base_addr;
2033
2034                 firm_id = base_addr + ID_ADDRESS;
2035                 if (!ISZLOADED(*card)) {
2036                         return -ENODEV;
2037                 }
2038
2039                 zfw_ctrl = card->base_addr +
2040                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2041                 board_ctrl = &zfw_ctrl->board_ctrl;
2042                 ch_ctrl = zfw_ctrl->ch_ctrl;
2043
2044 #ifdef CY_DEBUG_OPEN
2045                 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
2046                         "base_addr %p\n", card, channel, base_addr);
2047 #endif
2048                 CY_LOCK(info, flags);
2049
2050                 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2051 #ifdef Z_WAKE
2052 #ifdef CONFIG_CYZ_INTR
2053                 cy_writel(&ch_ctrl[channel].intr_enable,
2054                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2055                           C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
2056 #else
2057                 cy_writel(&ch_ctrl[channel].intr_enable,
2058                           C_IN_IOCTLW | C_IN_MDCD);
2059 #endif                          /* CONFIG_CYZ_INTR */
2060 #else
2061 #ifdef CONFIG_CYZ_INTR
2062                 cy_writel(&ch_ctrl[channel].intr_enable,
2063                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2064                           C_IN_RXNNDT | C_IN_MDCD);
2065 #else
2066                 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2067 #endif                          /* CONFIG_CYZ_INTR */
2068 #endif                          /* Z_WAKE */
2069
2070                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
2071                 if (retval != 0) {
2072                         printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
2073                                 "%x\n", info->line, retval);
2074                 }
2075
2076                 /* Flush RX buffers before raising DTR and RTS */
2077                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
2078                 if (retval != 0) {
2079                         printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
2080                                 "%x\n", info->line, retval);
2081                 }
2082
2083                 /* set timeout !!! */
2084                 /* set RTS and DTR !!! */
2085                 cy_writel(&ch_ctrl[channel].rs_control,
2086                         readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2087                         C_RS_DTR);
2088                 retval = cyz_issue_cmd(info->card, channel,
2089                                 C_CM_IOCTLM, 0L);
2090                 if (retval != 0) {
2091                         printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
2092                                 "%x\n", info->line, retval);
2093                 }
2094 #ifdef CY_DEBUG_DTR
2095                 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
2096 #endif
2097
2098                 /* enable send, recv, modem !!! */
2099
2100                 info->flags |= ASYNC_INITIALIZED;
2101                 if (info->tty) {
2102                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
2103                 }
2104                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2105                 info->breakon = info->breakoff = 0;
2106                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2107                 info->idle_stats.in_use =
2108                 info->idle_stats.recv_idle =
2109                 info->idle_stats.xmit_idle = jiffies;
2110
2111                 CY_UNLOCK(info, flags);
2112         }
2113
2114 #ifdef CY_DEBUG_OPEN
2115         printk(KERN_DEBUG "cyc startup done\n");
2116 #endif
2117         return 0;
2118
2119 errout:
2120         CY_UNLOCK(info, flags);
2121         return retval;
2122 }                               /* startup */
2123
2124 static void start_xmit(struct cyclades_port *info)
2125 {
2126         struct cyclades_card *card;
2127         unsigned long flags;
2128         void __iomem *base_addr;
2129         int chip, channel, index;
2130
2131         card = info->card;
2132         channel = info->line - card->first_line;
2133         if (!IS_CYC_Z(*card)) {
2134                 chip = channel >> 2;
2135                 channel &= 0x03;
2136                 index = card->bus_index;
2137                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2138
2139                 CY_LOCK(info, flags);
2140                 cy_writeb(base_addr + (CyCAR << index), channel);
2141                 cy_writeb(base_addr + (CySRER << index),
2142                         readb(base_addr + (CySRER << index)) | CyTxRdy);
2143                 CY_UNLOCK(info, flags);
2144         } else {
2145 #ifdef CONFIG_CYZ_INTR
2146                 int retval;
2147
2148                 CY_LOCK(info, flags);
2149                 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2150                 if (retval != 0) {
2151                         printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2152                                 "%x\n", info->line, retval);
2153                 }
2154                 CY_UNLOCK(info, flags);
2155 #else                           /* CONFIG_CYZ_INTR */
2156                 /* Don't have to do anything at this time */
2157 #endif                          /* CONFIG_CYZ_INTR */
2158         }
2159 }                               /* start_xmit */
2160
2161 /*
2162  * This routine shuts down a serial port; interrupts are disabled,
2163  * and DTR is dropped if the hangup on close termio flag is on.
2164  */
2165 static void shutdown(struct cyclades_port *info)
2166 {
2167         struct cyclades_card *card;
2168         unsigned long flags;
2169         void __iomem *base_addr;
2170         int chip, channel, index;
2171
2172         if (!(info->flags & ASYNC_INITIALIZED)) {
2173                 return;
2174         }
2175
2176         card = info->card;
2177         channel = info->line - card->first_line;
2178         if (!IS_CYC_Z(*card)) {
2179                 chip = channel >> 2;
2180                 channel &= 0x03;
2181                 index = card->bus_index;
2182                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2183
2184 #ifdef CY_DEBUG_OPEN
2185                 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2186                                 "channel %d, base_addr %p\n",
2187                                 card, chip, channel, base_addr);
2188 #endif
2189
2190                 CY_LOCK(info, flags);
2191
2192                 /* Clear delta_msr_wait queue to avoid mem leaks. */
2193                 wake_up_interruptible(&info->delta_msr_wait);
2194
2195                 if (info->xmit_buf) {
2196                         unsigned char *temp;
2197                         temp = info->xmit_buf;
2198                         info->xmit_buf = NULL;
2199                         free_page((unsigned long)temp);
2200                 }
2201                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2202                 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2203                         cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2204                         cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2205 #ifdef CY_DEBUG_DTR
2206                         printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2207                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2208                                 readb(base_addr + (CyMSVR1 << index)),
2209                                 readb(base_addr + (CyMSVR2 << index)));
2210 #endif
2211                 }
2212                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2213                 /* it may be appropriate to clear _XMIT at
2214                    some later date (after testing)!!! */
2215
2216                 if (info->tty) {
2217                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2218                 }
2219                 info->flags &= ~ASYNC_INITIALIZED;
2220                 CY_UNLOCK(info, flags);
2221         } else {
2222                 struct FIRM_ID __iomem *firm_id;
2223                 struct ZFW_CTRL __iomem *zfw_ctrl;
2224                 struct BOARD_CTRL __iomem *board_ctrl;
2225                 struct CH_CTRL __iomem *ch_ctrl;
2226                 int retval;
2227
2228                 base_addr = card->base_addr;
2229 #ifdef CY_DEBUG_OPEN
2230                 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2231                         "base_addr %p\n", card, channel, base_addr);
2232 #endif
2233
2234                 firm_id = base_addr + ID_ADDRESS;
2235                 if (!ISZLOADED(*card)) {
2236                         return;
2237                 }
2238
2239                 zfw_ctrl = card->base_addr +
2240                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2241                 board_ctrl = &zfw_ctrl->board_ctrl;
2242                 ch_ctrl = zfw_ctrl->ch_ctrl;
2243
2244                 CY_LOCK(info, flags);
2245
2246                 if (info->xmit_buf) {
2247                         unsigned char *temp;
2248                         temp = info->xmit_buf;
2249                         info->xmit_buf = NULL;
2250                         free_page((unsigned long)temp);
2251                 }
2252
2253                 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2254                         cy_writel(&ch_ctrl[channel].rs_control,
2255                                 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2256                                         ~(C_RS_RTS | C_RS_DTR)));
2257                         retval = cyz_issue_cmd(info->card, channel,
2258                                         C_CM_IOCTLM, 0L);
2259                         if (retval != 0) {
2260                                 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2261                                         "was %x\n", info->line, retval);
2262                         }
2263 #ifdef CY_DEBUG_DTR
2264                         printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2265 #endif
2266                 }
2267
2268                 if (info->tty) {
2269                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2270                 }
2271                 info->flags &= ~ASYNC_INITIALIZED;
2272
2273                 CY_UNLOCK(info, flags);
2274         }
2275
2276 #ifdef CY_DEBUG_OPEN
2277         printk(KERN_DEBUG "cyc shutdown done\n");
2278 #endif
2279 }                               /* shutdown */
2280
2281 /*
2282  * ------------------------------------------------------------
2283  * cy_open() and friends
2284  * ------------------------------------------------------------
2285  */
2286
2287 static int
2288 block_til_ready(struct tty_struct *tty, struct file *filp,
2289                 struct cyclades_port *info)
2290 {
2291         DECLARE_WAITQUEUE(wait, current);
2292         struct cyclades_card *cinfo;
2293         unsigned long flags;
2294         int chip, channel, index;
2295         int retval;
2296         void __iomem *base_addr;
2297
2298         cinfo = info->card;
2299         channel = info->line - cinfo->first_line;
2300
2301         /*
2302          * If the device is in the middle of being closed, then block
2303          * until it's done, and then try again.
2304          */
2305         if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2306                 wait_event_interruptible(info->close_wait,
2307                                 !(info->flags & ASYNC_CLOSING));
2308                 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2309         }
2310
2311         /*
2312          * If non-blocking mode is set, then make the check up front
2313          * and then exit.
2314          */
2315         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2316                 info->flags |= ASYNC_NORMAL_ACTIVE;
2317                 return 0;
2318         }
2319
2320         /*
2321          * Block waiting for the carrier detect and the line to become
2322          * free (i.e., not in use by the callout).  While we are in
2323          * this loop, info->count is dropped by one, so that
2324          * cy_close() knows when to free things.  We restore it upon
2325          * exit, either normal or abnormal.
2326          */
2327         retval = 0;
2328         add_wait_queue(&info->open_wait, &wait);
2329 #ifdef CY_DEBUG_OPEN
2330         printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2331                 "count = %d\n", info->line, info->count);
2332 #endif
2333         CY_LOCK(info, flags);
2334         if (!tty_hung_up_p(filp))
2335                 info->count--;
2336         CY_UNLOCK(info, flags);
2337 #ifdef CY_DEBUG_COUNT
2338         printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2339                 "%d\n", current->pid, info->count);
2340 #endif
2341         info->blocked_open++;
2342
2343         if (!IS_CYC_Z(*cinfo)) {
2344                 chip = channel >> 2;
2345                 channel &= 0x03;
2346                 index = cinfo->bus_index;
2347                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2348
2349                 while (1) {
2350                         CY_LOCK(info, flags);
2351                         if ((tty->termios->c_cflag & CBAUD)) {
2352                                 cy_writeb(base_addr + (CyCAR << index),
2353                                           (u_char) channel);
2354                                 cy_writeb(base_addr + (CyMSVR1 << index),
2355                                           CyRTS);
2356                                 cy_writeb(base_addr + (CyMSVR2 << index),
2357                                           CyDTR);
2358 #ifdef CY_DEBUG_DTR
2359                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2360                                         "DTR\n");
2361                                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2362                                         readb(base_addr + (CyMSVR1 << index)),
2363                                         readb(base_addr + (CyMSVR2 << index)));
2364 #endif
2365                         }
2366                         CY_UNLOCK(info, flags);
2367
2368                         set_current_state(TASK_INTERRUPTIBLE);
2369                         if (tty_hung_up_p(filp) ||
2370                                         !(info->flags & ASYNC_INITIALIZED)) {
2371                                 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2372                                           -EAGAIN : -ERESTARTSYS);
2373                                 break;
2374                         }
2375
2376                         CY_LOCK(info, flags);
2377                         cy_writeb(base_addr + (CyCAR << index),
2378                                   (u_char) channel);
2379                         if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2380                                         (readb(base_addr +
2381                                                 (CyMSVR1 << index)) & CyDCD))) {
2382                                 CY_UNLOCK(info, flags);
2383                                 break;
2384                         }
2385                         CY_UNLOCK(info, flags);
2386
2387                         if (signal_pending(current)) {
2388                                 retval = -ERESTARTSYS;
2389                                 break;
2390                         }
2391 #ifdef CY_DEBUG_OPEN
2392                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2393                                 "ttyC%d, count = %d\n",
2394                                 info->line, info->count);
2395 #endif
2396                         schedule();
2397                 }
2398         } else {
2399                 struct FIRM_ID __iomem *firm_id;
2400                 struct ZFW_CTRL __iomem *zfw_ctrl;
2401                 struct BOARD_CTRL __iomem *board_ctrl;
2402                 struct CH_CTRL __iomem *ch_ctrl;
2403                 int retval;
2404
2405                 base_addr = cinfo->base_addr;
2406                 firm_id = base_addr + ID_ADDRESS;
2407                 if (!ISZLOADED(*cinfo)) {
2408                         __set_current_state(TASK_RUNNING);
2409                         remove_wait_queue(&info->open_wait, &wait);
2410                         return -EINVAL;
2411                 }
2412
2413                 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2414                 board_ctrl = &zfw_ctrl->board_ctrl;
2415                 ch_ctrl = zfw_ctrl->ch_ctrl;
2416
2417                 while (1) {
2418                         if ((tty->termios->c_cflag & CBAUD)) {
2419                                 cy_writel(&ch_ctrl[channel].rs_control,
2420                                         readl(&ch_ctrl[channel].rs_control) |
2421                                         C_RS_RTS | C_RS_DTR);
2422                                 retval = cyz_issue_cmd(info->card,
2423                                         channel, C_CM_IOCTLM, 0L);
2424                                 if (retval != 0) {
2425                                         printk(KERN_ERR "cyc:block_til_ready "
2426                                                 "retval on ttyC%d was %x\n",
2427                                                 info->line, retval);
2428                                 }
2429 #ifdef CY_DEBUG_DTR
2430                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2431                                         "Z DTR\n");
2432 #endif
2433                         }
2434
2435                         set_current_state(TASK_INTERRUPTIBLE);
2436                         if (tty_hung_up_p(filp) ||
2437                                         !(info->flags & ASYNC_INITIALIZED)) {
2438                                 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2439                                           -EAGAIN : -ERESTARTSYS);
2440                                 break;
2441                         }
2442                         if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2443                                         (readl(&ch_ctrl[channel].rs_status) &
2444                                                 C_RS_DCD))) {
2445                                 break;
2446                         }
2447                         if (signal_pending(current)) {
2448                                 retval = -ERESTARTSYS;
2449                                 break;
2450                         }
2451 #ifdef CY_DEBUG_OPEN
2452                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2453                                 "ttyC%d, count = %d\n",
2454                                 info->line, info->count);
2455 #endif
2456                         schedule();
2457                 }
2458         }
2459         __set_current_state(TASK_RUNNING);
2460         remove_wait_queue(&info->open_wait, &wait);
2461         if (!tty_hung_up_p(filp)) {
2462                 info->count++;
2463 #ifdef CY_DEBUG_COUNT
2464                 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2465                         "count to %d\n", current->pid, info->count);
2466 #endif
2467         }
2468         info->blocked_open--;
2469 #ifdef CY_DEBUG_OPEN
2470         printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2471                 "count = %d\n", info->line, info->count);
2472 #endif
2473         if (retval)
2474                 return retval;
2475         info->flags |= ASYNC_NORMAL_ACTIVE;
2476         return 0;
2477 }                               /* block_til_ready */
2478
2479 /*
2480  * This routine is called whenever a serial port is opened.  It
2481  * performs the serial-specific initialization for the tty structure.
2482  */
2483 static int cy_open(struct tty_struct *tty, struct file *filp)
2484 {
2485         struct cyclades_port *info;
2486         int retval, line;
2487
2488         line = tty->index;
2489         if ((line < 0) || (NR_PORTS <= line)) {
2490                 return -ENODEV;
2491         }
2492         info = &cy_port[line];
2493         if (info->line < 0) {
2494                 return -ENODEV;
2495         }
2496
2497         /* If the card's firmware hasn't been loaded,
2498            treat it as absent from the system.  This
2499            will make the user pay attention.
2500          */
2501         if (IS_CYC_Z(*info->card)) {
2502                 struct cyclades_card *cinfo = info->card;
2503                 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2504
2505                 if (!ISZLOADED(*cinfo)) {
2506                         if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2507                                          (cinfo->ctl_addr))->mail_box_0)) &&
2508                                         Z_FPGA_CHECK(*cinfo)) &&
2509                                         (ZFIRM_HLT == readl(
2510                                                 &firm_id->signature))) {
2511                                 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2512                                         "need an external power supply for "
2513                                         "this number of ports.\nFirmware "
2514                                         "halted.\n");
2515                         } else {
2516                                 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2517                                         "yet loaded\n");
2518                         }
2519                         return -ENODEV;
2520                 }
2521 #ifdef CONFIG_CYZ_INTR
2522                 else {
2523                 /* In case this Z board is operating in interrupt mode, its
2524                    interrupts should be enabled as soon as the first open
2525                    happens to one of its ports. */
2526                         if (!cinfo->intr_enabled) {
2527                                 struct ZFW_CTRL __iomem *zfw_ctrl;
2528                                 struct BOARD_CTRL __iomem *board_ctrl;
2529
2530                                 zfw_ctrl = cinfo->base_addr +
2531                                         (readl(&firm_id->zfwctrl_addr) &
2532                                          0xfffff);
2533
2534                                 board_ctrl = &zfw_ctrl->board_ctrl;
2535
2536                                 /* Enable interrupts on the PLX chip */
2537                                 cy_writew(cinfo->ctl_addr + 0x68,
2538                                         readw(cinfo->ctl_addr + 0x68) | 0x0900);
2539                                 /* Enable interrupts on the FW */
2540                                 retval = cyz_issue_cmd(cinfo, 0,
2541                                                 C_CM_IRQ_ENBL, 0L);
2542                                 if (retval != 0) {
2543                                         printk(KERN_ERR "cyc:IRQ enable retval "
2544                                                 "was %x\n", retval);
2545                                 }
2546                                 cinfo->nports =
2547                                         (int)readl(&board_ctrl->n_channel);
2548                                 cinfo->intr_enabled = 1;
2549                         }
2550                 }
2551 #endif                          /* CONFIG_CYZ_INTR */
2552                 /* Make sure this Z port really exists in hardware */
2553                 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2554                         return -ENODEV;
2555         }
2556 #ifdef CY_DEBUG_OTHER
2557         printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2558 #endif
2559         tty->driver_data = info;
2560         info->tty = tty;
2561         if (serial_paranoia_check(info, tty->name, "cy_open")) {
2562                 return -ENODEV;
2563         }
2564 #ifdef CY_DEBUG_OPEN
2565         printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2566                         info->count);
2567 #endif
2568         info->count++;
2569 #ifdef CY_DEBUG_COUNT
2570         printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2571                 current->pid, info->count);
2572 #endif
2573
2574         /*
2575          * If the port is the middle of closing, bail out now
2576          */
2577         if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2578                 wait_event_interruptible(info->close_wait,
2579                                 !(info->flags & ASYNC_CLOSING));
2580                 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2581         }
2582
2583         /*
2584          * Start up serial port
2585          */
2586         retval = startup(info);
2587         if (retval) {
2588                 return retval;
2589         }
2590
2591         retval = block_til_ready(tty, filp, info);
2592         if (retval) {
2593 #ifdef CY_DEBUG_OPEN
2594                 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2595                         "with %d\n", retval);
2596 #endif
2597                 return retval;
2598         }
2599
2600         info->throttle = 0;
2601
2602 #ifdef CY_DEBUG_OPEN
2603         printk(KERN_DEBUG "cyc:cy_open done\n");
2604 #endif
2605         return 0;
2606 }                               /* cy_open */
2607
2608 /*
2609  * cy_wait_until_sent() --- wait until the transmitter is empty
2610  */
2611 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2612 {
2613         struct cyclades_card *card;
2614         struct cyclades_port *info = tty->driver_data;
2615         void __iomem *base_addr;
2616         int chip, channel, index;
2617         unsigned long orig_jiffies;
2618         int char_time;
2619
2620         if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2621                 return;
2622
2623         if (info->xmit_fifo_size == 0)
2624                 return;         /* Just in case.... */
2625
2626         orig_jiffies = jiffies;
2627         /*
2628          * Set the check interval to be 1/5 of the estimated time to
2629          * send a single character, and make it at least 1.  The check
2630          * interval should also be less than the timeout.
2631          *
2632          * Note: we have to use pretty tight timings here to satisfy
2633          * the NIST-PCTS.
2634          */
2635         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2636         char_time = char_time / 5;
2637         if (char_time <= 0)
2638                 char_time = 1;
2639         if (timeout < 0)
2640                 timeout = 0;
2641         if (timeout)
2642                 char_time = min(char_time, timeout);
2643         /*
2644          * If the transmitter hasn't cleared in twice the approximate
2645          * amount of time to send the entire FIFO, it probably won't
2646          * ever clear.  This assumes the UART isn't doing flow
2647          * control, which is currently the case.  Hence, if it ever
2648          * takes longer than info->timeout, this is probably due to a
2649          * UART bug of some kind.  So, we clamp the timeout parameter at
2650          * 2*info->timeout.
2651          */
2652         if (!timeout || timeout > 2 * info->timeout)
2653                 timeout = 2 * info->timeout;
2654 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2655         printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2656                 timeout, char_time, jiffies);
2657 #endif
2658         card = info->card;
2659         channel = (info->line) - (card->first_line);
2660         if (!IS_CYC_Z(*card)) {
2661                 chip = channel >> 2;
2662                 channel &= 0x03;
2663                 index = card->bus_index;
2664                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2665                 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2666 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2667                         printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2668 #endif
2669                         if (msleep_interruptible(jiffies_to_msecs(char_time)))
2670                                 break;
2671                         if (timeout && time_after(jiffies, orig_jiffies +
2672                                         timeout))
2673                                 break;
2674                 }
2675         } else {
2676                 /* Nothing to do! */
2677         }
2678         /* Run one more char cycle */
2679         msleep_interruptible(jiffies_to_msecs(char_time * 5));
2680 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2681         printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2682 #endif
2683 }
2684
2685 /*
2686  * This routine is called when a particular tty device is closed.
2687  */
2688 static void cy_close(struct tty_struct *tty, struct file *filp)
2689 {
2690         struct cyclades_port *info = tty->driver_data;
2691         unsigned long flags;
2692
2693 #ifdef CY_DEBUG_OTHER
2694         printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2695 #endif
2696
2697         if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2698                 return;
2699         }
2700
2701         CY_LOCK(info, flags);
2702         /* If the TTY is being hung up, nothing to do */
2703         if (tty_hung_up_p(filp)) {
2704                 CY_UNLOCK(info, flags);
2705                 return;
2706         }
2707 #ifdef CY_DEBUG_OPEN
2708         printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2709                 info->count);
2710 #endif
2711         if ((tty->count == 1) && (info->count != 1)) {
2712                 /*
2713                  * Uh, oh.  tty->count is 1, which means that the tty
2714                  * structure will be freed.  Info->count should always
2715                  * be one in these conditions.  If it's greater than
2716                  * one, we've got real problems, since it means the
2717                  * serial port won't be shutdown.
2718                  */
2719                 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2720                         "tty->count is 1, info->count is %d\n", info->count);
2721                 info->count = 1;
2722         }
2723 #ifdef CY_DEBUG_COUNT
2724         printk(KERN_DEBUG  "cyc:cy_close at (%d): decrementing count to %d\n",
2725                 current->pid, info->count - 1);
2726 #endif
2727         if (--info->count < 0) {
2728 #ifdef CY_DEBUG_COUNT
2729                 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2730 #endif
2731                 info->count = 0;
2732         }
2733         if (info->count) {
2734                 CY_UNLOCK(info, flags);
2735                 return;
2736         }
2737         info->flags |= ASYNC_CLOSING;
2738
2739         /*
2740          * Now we wait for the transmit buffer to clear; and we notify
2741          * the line discipline to only process XON/XOFF characters.
2742          */
2743         tty->closing = 1;
2744         CY_UNLOCK(info, flags);
2745         if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2746                 tty_wait_until_sent(tty, info->closing_wait);
2747         }
2748         CY_LOCK(info, flags);
2749
2750         if (!IS_CYC_Z(*info->card)) {
2751                 int channel = info->line - info->card->first_line;
2752                 int index = info->card->bus_index;
2753                 void __iomem *base_addr = info->card->base_addr +
2754                         (cy_chip_offset[channel >> 2] << index);
2755                 /* Stop accepting input */
2756                 channel &= 0x03;
2757                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2758                 cy_writeb(base_addr + (CySRER << index),
2759                           readb(base_addr + (CySRER << index)) & ~CyRxData);
2760                 if (info->flags & ASYNC_INITIALIZED) {
2761                         /* Waiting for on-board buffers to be empty before closing
2762                            the port */
2763                         CY_UNLOCK(info, flags);
2764                         cy_wait_until_sent(tty, info->timeout);
2765                         CY_LOCK(info, flags);
2766                 }
2767         } else {
2768 #ifdef Z_WAKE
2769                 /* Waiting for on-board buffers to be empty before closing the port */
2770                 void __iomem *base_addr = info->card->base_addr;
2771                 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2772                 struct ZFW_CTRL __iomem *zfw_ctrl =
2773                     base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2774                 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2775                 int channel = info->line - info->card->first_line;
2776                 int retval;
2777
2778                 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2779                         retval = cyz_issue_cmd(info->card, channel,
2780                                                 C_CM_IOCTLW, 0L);
2781                         if (retval != 0) {
2782                                 printk(KERN_DEBUG "cyc:cy_close retval on "
2783                                         "ttyC%d was %x\n", info->line, retval);
2784                         }
2785                         CY_UNLOCK(info, flags);
2786                         wait_for_completion_interruptible(&info->shutdown_wait);
2787                         CY_LOCK(info, flags);
2788                 }
2789 #endif
2790         }
2791
2792         CY_UNLOCK(info, flags);
2793         shutdown(info);
2794         if (tty->driver->flush_buffer)
2795                 tty->driver->flush_buffer(tty);
2796         tty_ldisc_flush(tty);
2797         CY_LOCK(info, flags);
2798
2799         tty->closing = 0;
2800         info->event = 0;
2801         info->tty = NULL;
2802         if (info->blocked_open) {
2803                 CY_UNLOCK(info, flags);
2804                 if (info->close_delay) {
2805                         msleep_interruptible(jiffies_to_msecs
2806                                                 (info->close_delay));
2807                 }
2808                 wake_up_interruptible(&info->open_wait);
2809                 CY_LOCK(info, flags);
2810         }
2811         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2812         wake_up_interruptible(&info->close_wait);
2813
2814 #ifdef CY_DEBUG_OTHER
2815         printk(KERN_DEBUG "cyc:cy_close done\n");
2816 #endif
2817
2818         CY_UNLOCK(info, flags);
2819 }                               /* cy_close */
2820
2821 /* This routine gets called when tty_write has put something into
2822  * the write_queue.  The characters may come from user space or
2823  * kernel space.
2824  *
2825  * This routine will return the number of characters actually
2826  * accepted for writing.
2827  *
2828  * If the port is not already transmitting stuff, start it off by
2829  * enabling interrupts.  The interrupt service routine will then
2830  * ensure that the characters are sent.
2831  * If the port is already active, there is no need to kick it.
2832  *
2833  */
2834 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2835 {
2836         struct cyclades_port *info = tty->driver_data;
2837         unsigned long flags;
2838         int c, ret = 0;
2839
2840 #ifdef CY_DEBUG_IO
2841         printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2842 #endif
2843
2844         if (serial_paranoia_check(info, tty->name, "cy_write")) {
2845                 return 0;
2846         }
2847
2848         if (!info->xmit_buf)
2849                 return 0;
2850
2851         CY_LOCK(info, flags);
2852         while (1) {
2853                 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2854                                    (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2855
2856                 if (c <= 0)
2857                         break;
2858
2859                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2860                 info->xmit_head = (info->xmit_head + c) &
2861                         (SERIAL_XMIT_SIZE - 1);
2862                 info->xmit_cnt += c;
2863                 buf += c;
2864                 count -= c;
2865                 ret += c;
2866         }
2867         CY_UNLOCK(info, flags);
2868
2869         info->idle_stats.xmit_bytes += ret;
2870         info->idle_stats.xmit_idle = jiffies;
2871
2872         if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2873                 start_xmit(info);
2874         }
2875         return ret;
2876 }                               /* cy_write */
2877
2878 /*
2879  * This routine is called by the kernel to write a single
2880  * character to the tty device.  If the kernel uses this routine,
2881  * it must call the flush_chars() routine (if defined) when it is
2882  * done stuffing characters into the driver.  If there is no room
2883  * in the queue, the character is ignored.
2884  */
2885 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2886 {
2887         struct cyclades_port *info = tty->driver_data;
2888         unsigned long flags;
2889
2890 #ifdef CY_DEBUG_IO
2891         printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2892 #endif
2893
2894         if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2895                 return;
2896
2897         if (!info->xmit_buf)
2898                 return;
2899
2900         CY_LOCK(info, flags);
2901         if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2902                 CY_UNLOCK(info, flags);
2903                 return;
2904         }
2905
2906         info->xmit_buf[info->xmit_head++] = ch;
2907         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2908         info->xmit_cnt++;
2909         info->idle_stats.xmit_bytes++;
2910         info->idle_stats.xmit_idle = jiffies;
2911         CY_UNLOCK(info, flags);
2912 }                               /* cy_put_char */
2913
2914 /*
2915  * This routine is called by the kernel after it has written a
2916  * series of characters to the tty device using put_char().
2917  */
2918 static void cy_flush_chars(struct tty_struct *tty)
2919 {
2920         struct cyclades_port *info = tty->driver_data;
2921
2922 #ifdef CY_DEBUG_IO
2923         printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2924 #endif
2925
2926         if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2927                 return;
2928
2929         if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2930                         !info->xmit_buf)
2931                 return;
2932
2933         start_xmit(info);
2934 }                               /* cy_flush_chars */
2935
2936 /*
2937  * This routine returns the numbers of characters the tty driver
2938  * will accept for queuing to be written.  This number is subject
2939  * to change as output buffers get emptied, or if the output flow
2940  * control is activated.
2941  */
2942 static int cy_write_room(struct tty_struct *tty)
2943 {
2944         struct cyclades_port *info = tty->driver_data;
2945         int ret;
2946
2947 #ifdef CY_DEBUG_IO
2948         printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2949 #endif
2950
2951         if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2952                 return 0;
2953         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2954         if (ret < 0)
2955                 ret = 0;
2956         return ret;
2957 }                               /* cy_write_room */
2958
2959 static int cy_chars_in_buffer(struct tty_struct *tty)
2960 {
2961         struct cyclades_card *card;
2962         struct cyclades_port *info = tty->driver_data;
2963         int channel;
2964
2965         if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2966                 return 0;
2967
2968         card = info->card;
2969         channel = (info->line) - (card->first_line);
2970
2971 #ifdef Z_EXT_CHARS_IN_BUFFER
2972         if (!IS_CYC_Z(cy_card[card])) {
2973 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
2974 #ifdef CY_DEBUG_IO
2975                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2976                         info->line, info->xmit_cnt);
2977 #endif
2978                 return info->xmit_cnt;
2979 #ifdef Z_EXT_CHARS_IN_BUFFER
2980         } else {
2981                 static struct FIRM_ID *firm_id;
2982                 static struct ZFW_CTRL *zfw_ctrl;
2983                 static struct CH_CTRL *ch_ctrl;
2984                 static struct BUF_CTRL *buf_ctrl;
2985                 int char_count;
2986                 __u32 tx_put, tx_get, tx_bufsize;
2987
2988                 firm_id = card->base_addr + ID_ADDRESS;
2989                 zfw_ctrl = card->base_addr +
2990                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2991                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2992                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2993
2994                 tx_get = readl(&buf_ctrl->tx_get);
2995                 tx_put = readl(&buf_ctrl->tx_put);
2996                 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
2997                 if (tx_put >= tx_get)
2998                         char_count = tx_put - tx_get;
2999                 else
3000                         char_count = tx_put - tx_get + tx_bufsize;
3001 #ifdef CY_DEBUG_IO
3002                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
3003                         info->line, info->xmit_cnt + char_count);
3004 #endif
3005                 return info->xmit_cnt + char_count;
3006         }
3007 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
3008 }                               /* cy_chars_in_buffer */
3009
3010 /*
3011  * ------------------------------------------------------------
3012  * cy_ioctl() and friends
3013  * ------------------------------------------------------------
3014  */
3015
3016 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
3017 {
3018         int co, co_val, bpr;
3019         __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3020                         25000000);
3021
3022         if (baud == 0) {
3023                 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3024                 return;
3025         }
3026
3027         /* determine which prescaler to use */
3028         for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3029                 if (cy_clock / co_val / baud > 63)
3030                         break;
3031         }
3032
3033         bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3034         if (bpr > 255)
3035                 bpr = 255;
3036
3037         info->tbpr = info->rbpr = bpr;
3038         info->tco = info->rco = co;
3039 }
3040
3041 /*
3042  * This routine finds or computes the various line characteristics.
3043  * It used to be called config_setup
3044  */
3045 static void set_line_char(struct cyclades_port *info)
3046 {
3047         struct cyclades_card *card;
3048         unsigned long flags;
3049         void __iomem *base_addr;
3050         int chip, channel, index;
3051         unsigned cflag, iflag;
3052         unsigned short chip_number;
3053         int baud, baud_rate = 0;
3054         int i;
3055
3056         if (!info->tty || !info->tty->termios) {
3057                 return;
3058         }
3059         if (info->line == -1) {
3060                 return;
3061         }
3062         cflag = info->tty->termios->c_cflag;
3063         iflag = info->tty->termios->c_iflag;
3064
3065         /*
3066          * Set up the tty->alt_speed kludge
3067          */
3068         if (info->tty) {
3069                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3070                         info->tty->alt_speed = 57600;
3071                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3072                         info->tty->alt_speed = 115200;
3073                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3074                         info->tty->alt_speed = 230400;
3075                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3076                         info->tty->alt_speed = 460800;
3077         }
3078
3079         card = info->card;
3080         channel = info->line - card->first_line;
3081         chip_number = channel / 4;
3082
3083         if (!IS_CYC_Z(*card)) {
3084
3085                 index = card->bus_index;
3086
3087                 /* baud rate */
3088                 baud = tty_get_baud_rate(info->tty);
3089                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3090                                 ASYNC_SPD_CUST) {
3091                         if (info->custom_divisor)
3092                                 baud_rate = info->baud / info->custom_divisor;
3093                         else
3094                                 baud_rate = info->baud;
3095                 } else if (baud > CD1400_MAX_SPEED) {
3096                         baud = CD1400_MAX_SPEED;
3097                 }
3098                 /* find the baud index */
3099                 for (i = 0; i < 20; i++) {
3100                         if (baud == baud_table[i]) {
3101                                 break;
3102                         }
3103                 }
3104                 if (i == 20) {
3105                         i = 19; /* CD1400_MAX_SPEED */
3106                 }
3107
3108                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3109                                 ASYNC_SPD_CUST) {
3110                         cyy_baud_calc(info, baud_rate);
3111                 } else {
3112                         if (info->chip_rev >= CD1400_REV_J) {
3113                                 /* It is a CD1400 rev. J or later */
3114                                 info->tbpr = baud_bpr_60[i];    /* Tx BPR */
3115                                 info->tco = baud_co_60[i];      /* Tx CO */
3116                                 info->rbpr = baud_bpr_60[i];    /* Rx BPR */
3117                                 info->rco = baud_co_60[i];      /* Rx CO */
3118                         } else {
3119                                 info->tbpr = baud_bpr_25[i];    /* Tx BPR */
3120                                 info->tco = baud_co_25[i];      /* Tx CO */
3121                                 info->rbpr = baud_bpr_25[i];    /* Rx BPR */
3122                                 info->rco = baud_co_25[i];      /* Rx CO */
3123                         }
3124                 }
3125                 if (baud_table[i] == 134) {
3126                         /* get it right for 134.5 baud */
3127                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3128                                         2;
3129                 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3130                                 ASYNC_SPD_CUST) {
3131                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3132                                         baud_rate) + 2;
3133                 } else if (baud_table[i]) {
3134                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3135                                         baud_table[i]) + 2;
3136                         /* this needs to be propagated into the card info */
3137                 } else {
3138                         info->timeout = 0;
3139                 }
3140                 /* By tradition (is it a standard?) a baud rate of zero
3141                    implies the line should be/has been closed.  A bit
3142                    later in this routine such a test is performed. */
3143
3144                 /* byte size and parity */
3145                 info->cor5 = 0;
3146                 info->cor4 = 0;
3147                 /* receive threshold */
3148                 info->cor3 = (info->default_threshold ?
3149                                 info->default_threshold : baud_cor3[i]);
3150                 info->cor2 = CyETC;
3151                 switch (cflag & CSIZE) {
3152                 case CS5:
3153                         info->cor1 = Cy_5_BITS;
3154                         break;
3155                 case CS6:
3156                         info->cor1 = Cy_6_BITS;
3157                         break;
3158                 case CS7:
3159                         info->cor1 = Cy_7_BITS;
3160                         break;
3161                 case CS8:
3162                         info->cor1 = Cy_8_BITS;
3163                         break;
3164                 }
3165                 if (cflag & CSTOPB) {
3166                         info->cor1 |= Cy_2_STOP;
3167                 }
3168                 if (cflag & PARENB) {
3169                         if (cflag & PARODD) {
3170                                 info->cor1 |= CyPARITY_O;
3171                         } else {
3172                                 info->cor1 |= CyPARITY_E;
3173                         }
3174                 } else {
3175                         info->cor1 |= CyPARITY_NONE;
3176                 }
3177
3178                 /* CTS flow control flag */
3179                 if (cflag & CRTSCTS) {
3180                         info->flags |= ASYNC_CTS_FLOW;
3181                         info->cor2 |= CyCtsAE;
3182                 } else {
3183                         info->flags &= ~ASYNC_CTS_FLOW;
3184                         info->cor2 &= ~CyCtsAE;
3185                 }
3186                 if (cflag & CLOCAL)
3187                         info->flags &= ~ASYNC_CHECK_CD;
3188                 else
3189                         info->flags |= ASYNC_CHECK_CD;
3190
3191          /***********************************************
3192             The hardware option, CyRtsAO, presents RTS when
3193             the chip has characters to send.  Since most modems
3194             use RTS as reverse (inbound) flow control, this
3195             option is not used.  If inbound flow control is
3196             necessary, DTR can be programmed to provide the
3197             appropriate signals for use with a non-standard
3198             cable.  Contact Marcio Saito for details.
3199          ***********************************************/
3200
3201                 chip = channel >> 2;
3202                 channel &= 0x03;
3203                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3204
3205                 CY_LOCK(info, flags);
3206                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3207
3208                 /* tx and rx baud rate */
3209
3210                 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3211                 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3212                 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3213                 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3214
3215                 /* set line characteristics  according configuration */
3216
3217                 cy_writeb(base_addr + (CySCHR1 << index),
3218                           START_CHAR(info->tty));
3219                 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3220                 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3221                 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3222                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3223                 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3224                 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3225
3226                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3227                                 CyCOR3ch, index);
3228
3229                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);      /* !!! Is this needed? */
3230                 cy_writeb(base_addr + (CyRTPR << index),
3231                         (info->default_timeout ? info->default_timeout : 0x02));
3232                 /* 10ms rx timeout */
3233
3234                 if (C_CLOCAL(info->tty)) {
3235                         /* without modem intr */
3236                         cy_writeb(base_addr + (CySRER << index),
3237                                 readb(base_addr + (CySRER << index)) | CyMdmCh);
3238                         /* act on 1->0 modem transitions */
3239                         if ((cflag & CRTSCTS) && info->rflow) {
3240                                 cy_writeb(base_addr + (CyMCOR1 << index),
3241                                           (CyCTS | rflow_thr[i]));
3242                         } else {
3243                                 cy_writeb(base_addr + (CyMCOR1 << index),
3244                                           CyCTS);
3245                         }
3246                         /* act on 0->1 modem transitions */
3247                         cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3248                 } else {
3249                         /* without modem intr */
3250                         cy_writeb(base_addr + (CySRER << index),
3251                                   readb(base_addr +
3252                                            (CySRER << index)) | CyMdmCh);
3253                         /* act on 1->0 modem transitions */
3254                         if ((cflag & CRTSCTS) && info->rflow) {
3255                                 cy_writeb(base_addr + (CyMCOR1 << index),
3256                                           (CyDSR | CyCTS | CyRI | CyDCD |
3257                                            rflow_thr[i]));
3258                         } else {
3259                                 cy_writeb(base_addr + (CyMCOR1 << index),
3260                                           CyDSR | CyCTS | CyRI | CyDCD);
3261                         }
3262                         /* act on 0->1 modem transitions */
3263                         cy_writeb(base_addr + (CyMCOR2 << index),
3264                                   CyDSR | CyCTS | CyRI | CyDCD);
3265                 }
3266
3267                 if (i == 0) {   /* baud rate is zero, turn off line */
3268                         if (info->rtsdtr_inv) {
3269                                 cy_writeb(base_addr + (CyMSVR1 << index),
3270                                           ~CyRTS);
3271                         } else {
3272                                 cy_writeb(base_addr + (CyMSVR2 << index),
3273                                           ~CyDTR);
3274                         }
3275 #ifdef CY_DEBUG_DTR
3276                         printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3277                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3278                                 readb(base_addr + (CyMSVR1 << index)),
3279                                 readb(base_addr + (CyMSVR2 << index)));
3280 #endif
3281                 } else {
3282                         if (info->rtsdtr_inv) {
3283                                 cy_writeb(base_addr + (CyMSVR1 << index),
3284                                           CyRTS);
3285                         } else {
3286                                 cy_writeb(base_addr + (CyMSVR2 << index),
3287                                           CyDTR);
3288                         }
3289 #ifdef CY_DEBUG_DTR
3290                         printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3291                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3292                                 readb(base_addr + (CyMSVR1 << index)),
3293                                 readb(base_addr + (CyMSVR2 << index)));
3294 #endif
3295                 }
3296
3297                 if (info->tty) {
3298                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
3299                 }
3300                 CY_UNLOCK(info, flags);
3301
3302         } else {
3303                 struct FIRM_ID __iomem *firm_id;
3304                 struct ZFW_CTRL __iomem *zfw_ctrl;
3305                 struct BOARD_CTRL __iomem *board_ctrl;
3306                 struct CH_CTRL __iomem *ch_ctrl;
3307                 struct BUF_CTRL __iomem *buf_ctrl;
3308                 __u32 sw_flow;
3309                 int retval;
3310
3311                 firm_id = card->base_addr + ID_ADDRESS;
3312                 if (!ISZLOADED(*card)) {
3313                         return;
3314                 }
3315
3316                 zfw_ctrl = card->base_addr +
3317                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3318                 board_ctrl = &zfw_ctrl->board_ctrl;
3319                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3320                 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3321
3322                 /* baud rate */
3323                 baud = tty_get_baud_rate(info->tty);
3324                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3325                                 ASYNC_SPD_CUST) {
3326                         if (info->custom_divisor)
3327                                 baud_rate = info->baud / info->custom_divisor;
3328                         else
3329                                 baud_rate = info->baud;
3330                 } else if (baud > CYZ_MAX_SPEED) {
3331                         baud = CYZ_MAX_SPEED;
3332                 }
3333                 cy_writel(&ch_ctrl->comm_baud, baud);
3334
3335                 if (baud == 134) {
3336                         /* get it right for 134.5 baud */
3337                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3338                                         2;
3339                 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3340                                 ASYNC_SPD_CUST) {
3341                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3342                                         baud_rate) + 2;
3343                 } else if (baud) {
3344                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3345                                         baud) + 2;
3346                         /* this needs to be propagated into the card info */
3347                 } else {
3348                         info->timeout = 0;
3349                 }
3350
3351                 /* byte size and parity */
3352                 switch (cflag & CSIZE) {
3353                 case CS5:
3354                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3355                         break;
3356                 case CS6:
3357                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3358                         break;
3359                 case CS7:
3360                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3361                         break;
3362                 case CS8:
3363                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3364                         break;
3365                 }
3366                 if (cflag & CSTOPB) {
3367                         cy_writel(&ch_ctrl->comm_data_l,
3368                                   readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3369                 } else {
3370                         cy_writel(&ch_ctrl->comm_data_l,
3371                                   readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3372                 }
3373                 if (cflag & PARENB) {
3374                         if (cflag & PARODD) {
3375                                 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3376                         } else {
3377                                 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3378                         }
3379                 } else {
3380                         cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3381                 }
3382
3383                 /* CTS flow control flag */
3384                 if (cflag & CRTSCTS) {
3385                         cy_writel(&ch_ctrl->hw_flow,
3386                                 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3387                 } else {
3388                         cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3389                                         ~(C_RS_CTS | C_RS_RTS));
3390                 }
3391                 /* As the HW flow control is done in firmware, the driver
3392                    doesn't need to care about it */
3393                 info->flags &= ~ASYNC_CTS_FLOW;
3394
3395                 /* XON/XOFF/XANY flow control flags */
3396                 sw_flow = 0;
3397                 if (iflag & IXON) {
3398                         sw_flow |= C_FL_OXX;
3399                         if (iflag & IXANY)
3400                                 sw_flow |= C_FL_OIXANY;
3401                 }
3402                 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3403
3404                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3405                 if (retval != 0) {
3406                         printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3407                                 "was %x\n", info->line, retval);
3408                 }
3409
3410                 /* CD sensitivity */
3411                 if (cflag & CLOCAL) {
3412                         info->flags &= ~ASYNC_CHECK_CD;
3413                 } else {
3414                         info->flags |= ASYNC_CHECK_CD;
3415                 }
3416
3417                 if (baud == 0) {        /* baud rate is zero, turn off line */
3418                         cy_writel(&ch_ctrl->rs_control,
3419                                   readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3420 #ifdef CY_DEBUG_DTR
3421                         printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3422 #endif
3423                 } else {
3424                         cy_writel(&ch_ctrl->rs_control,
3425                                   readl(&ch_ctrl->rs_control) | C_RS_DTR);
3426 #ifdef CY_DEBUG_DTR
3427                         printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3428 #endif
3429                 }
3430
3431                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
3432                 if (retval != 0) {
3433                         printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3434                                 "was %x\n", info->line, retval);
3435                 }
3436
3437                 if (info->tty) {
3438                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
3439                 }
3440         }
3441 }                               /* set_line_char */
3442
3443 static int
3444 get_serial_info(struct cyclades_port *info,
3445                 struct serial_struct __user * retinfo)
3446 {
3447         struct serial_struct tmp;
3448         struct cyclades_card *cinfo = info->card;
3449
3450         if (!retinfo)
3451                 return -EFAULT;
3452         memset(&tmp, 0, sizeof(tmp));
3453         tmp.type = info->type;
3454         tmp.line = info->line;
3455         tmp.port = (info->card - cy_card) * 0x100 + info->line -
3456                 cinfo->first_line;
3457         tmp.irq = cinfo->irq;
3458         tmp.flags = info->flags;
3459         tmp.close_delay = info->close_delay;
3460         tmp.closing_wait = info->closing_wait;
3461         tmp.baud_base = info->baud;
3462         tmp.custom_divisor = info->custom_divisor;
3463         tmp.hub6 = 0;           /*!!! */
3464         return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3465 }                               /* get_serial_info */
3466
3467 static int
3468 set_serial_info(struct cyclades_port *info,
3469                 struct serial_struct __user * new_info)
3470 {
3471         struct serial_struct new_serial;
3472         struct cyclades_port old_info;
3473
3474         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3475                 return -EFAULT;
3476         old_info = *info;
3477
3478         if (!capable(CAP_SYS_ADMIN)) {
3479                 if (new_serial.close_delay != info->close_delay ||
3480                                 new_serial.baud_base != info->baud ||
3481                                 (new_serial.flags & ASYNC_FLAGS &
3482                                         ~ASYNC_USR_MASK) !=
3483                                 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3484                         return -EPERM;
3485                 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3486                                 (new_serial.flags & ASYNC_USR_MASK);
3487                 info->baud = new_serial.baud_base;
3488                 info->custom_divisor = new_serial.custom_divisor;
3489                 goto check_and_exit;
3490         }
3491
3492         /*
3493          * OK, past this point, all the error checking has been done.
3494          * At this point, we start making changes.....
3495          */
3496
3497         info->baud = new_serial.baud_base;
3498         info->custom_divisor = new_serial.custom_divisor;
3499         info->flags = (info->flags & ~ASYNC_FLAGS) |
3500                         (new_serial.flags & ASYNC_FLAGS);
3501         info->close_delay = new_serial.close_delay * HZ / 100;
3502         info->closing_wait = new_serial.closing_wait * HZ / 100;
3503
3504 check_and_exit:
3505         if (info->flags & ASYNC_INITIALIZED) {
3506                 set_line_char(info);
3507                 return 0;
3508         } else {
3509                 return startup(info);
3510         }
3511 }                               /* set_serial_info */
3512
3513 /*
3514  * get_lsr_info - get line status register info
3515  *
3516  * Purpose: Let user call ioctl() to get info when the UART physically
3517  *          is emptied.  On bus types like RS485, the transmitter must
3518  *          release the bus after transmitting. This must be done when
3519  *          the transmit shift register is empty, not be done when the
3520  *          transmit holding register is empty.  This functionality
3521  *          allows an RS485 driver to be written in user space.
3522  */
3523 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3524 {
3525         struct cyclades_card *card;
3526         int chip, channel, index;
3527         unsigned char status;
3528         unsigned int result;
3529         unsigned long flags;
3530         void __iomem *base_addr;
3531
3532         card = info->card;
3533         channel = (info->line) - (card->first_line);
3534         if (!IS_CYC_Z(*card)) {
3535                 chip = channel >> 2;
3536                 channel &= 0x03;
3537                 index = card->bus_index;
3538                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3539
3540                 CY_LOCK(info, flags);
3541                 status = readb(base_addr + (CySRER << index)) &
3542                                 (CyTxRdy | CyTxMpty);
3543                 CY_UNLOCK(info, flags);
3544                 result = (status ? 0 : TIOCSER_TEMT);
3545         } else {
3546                 /* Not supported yet */
3547                 return -EINVAL;
3548         }
3549         return put_user(result, (unsigned long __user *)value);
3550 }
3551
3552 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3553 {
3554         struct cyclades_port *info = tty->driver_data;
3555         struct cyclades_card *card;
3556         int chip, channel, index;
3557         void __iomem *base_addr;
3558         unsigned long flags;
3559         unsigned char status;
3560         unsigned long lstatus;
3561         unsigned int result;
3562         struct FIRM_ID __iomem *firm_id;
3563         struct ZFW_CTRL __iomem *zfw_ctrl;
3564         struct BOARD_CTRL __iomem *board_ctrl;
3565         struct CH_CTRL __iomem *ch_ctrl;
3566
3567         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3568                 return -ENODEV;
3569
3570         card = info->card;
3571         channel = info->line - card->first_line;
3572         if (!IS_CYC_Z(*card)) {
3573                 chip = channel >> 2;
3574                 channel &= 0x03;
3575                 index = card->bus_index;
3576                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3577
3578                 CY_LOCK(info, flags);
3579                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3580                 status = readb(base_addr + (CyMSVR1 << index));
3581                 status |= readb(base_addr + (CyMSVR2 << index));
3582                 CY_UNLOCK(info, flags);
3583
3584                 if (info->rtsdtr_inv) {
3585                         result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3586                                 ((status & CyDTR) ? TIOCM_RTS : 0);
3587                 } else {
3588                         result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3589                                 ((status & CyDTR) ? TIOCM_DTR : 0);
3590                 }
3591                 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3592                         ((status & CyRI) ? TIOCM_RNG : 0) |
3593                         ((status & CyDSR) ? TIOCM_DSR : 0) |
3594                         ((status & CyCTS) ? TIOCM_CTS : 0);
3595         } else {
3596                 base_addr = card->base_addr;
3597                 firm_id = card->base_addr + ID_ADDRESS;
3598                 if (ISZLOADED(*card)) {
3599                         zfw_ctrl = card->base_addr +
3600                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3601                         board_ctrl = &zfw_ctrl->board_ctrl;
3602                         ch_ctrl = zfw_ctrl->ch_ctrl;
3603                         lstatus = readl(&ch_ctrl[channel].rs_status);
3604                         result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3605                                 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3606                                 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3607                                 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3608                                 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3609                                 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3610                 } else {
3611                         result = 0;
3612                         return -ENODEV;
3613                 }
3614
3615         }
3616         return result;
3617 }                               /* cy_tiomget */
3618
3619 static int
3620 cy_tiocmset(struct tty_struct *tty, struct file *file,
3621                 unsigned int set, unsigned int clear)
3622 {
3623         struct cyclades_port *info = tty->driver_data;
3624         struct cyclades_card *card;
3625         int chip, channel, index;
3626         void __iomem *base_addr;
3627         unsigned long flags;
3628         struct FIRM_ID __iomem *firm_id;
3629         struct ZFW_CTRL __iomem *zfw_ctrl;
3630         struct BOARD_CTRL __iomem *board_ctrl;
3631         struct CH_CTRL __iomem *ch_ctrl;
3632         int retval;
3633
3634         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3635                 return -ENODEV;
3636
3637         card = info->card;
3638         channel = (info->line) - (card->first_line);
3639         if (!IS_CYC_Z(*card)) {
3640                 chip = channel >> 2;
3641                 channel &= 0x03;
3642                 index = card->bus_index;
3643                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3644
3645                 if (set & TIOCM_RTS) {
3646                         CY_LOCK(info, flags);
3647                         cy_writeb(base_addr + (CyCAR << index),
3648                                   (u_char) channel);
3649                         if (info->rtsdtr_inv) {
3650                                 cy_writeb(base_addr + (CyMSVR2 << index),
3651                                           CyDTR);
3652                         } else {
3653                                 cy_writeb(base_addr + (CyMSVR1 << index),
3654                                           CyRTS);
3655                         }
3656                         CY_UNLOCK(info, flags);
3657                 }
3658                 if (clear & TIOCM_RTS) {
3659                         CY_LOCK(info, flags);
3660                         cy_writeb(base_addr + (CyCAR << index),
3661                                   (u_char) channel);
3662                         if (info->rtsdtr_inv) {
3663                                 cy_writeb(base_addr + (CyMSVR2 << index),
3664                                           ~CyDTR);
3665                         } else {
3666                                 cy_writeb(base_addr + (CyMSVR1 << index),
3667                                           ~CyRTS);
3668                         }
3669                         CY_UNLOCK(info, flags);
3670                 }
3671                 if (set & TIOCM_DTR) {
3672                         CY_LOCK(info, flags);
3673                         cy_writeb(base_addr + (CyCAR << index),
3674                                   (u_char) channel);
3675                         if (info->rtsdtr_inv) {
3676                                 cy_writeb(base_addr + (CyMSVR1 << index),
3677                                           CyRTS);
3678                         } else {
3679                                 cy_writeb(base_addr + (CyMSVR2 << index),
3680                                           CyDTR);
3681                         }
3682 #ifdef CY_DEBUG_DTR
3683                         printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3684                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3685                                 readb(base_addr + (CyMSVR1 << index)),
3686                                 readb(base_addr + (CyMSVR2 << index)));
3687 #endif
3688                         CY_UNLOCK(info, flags);
3689                 }
3690                 if (clear & TIOCM_DTR) {
3691                         CY_LOCK(info, flags);
3692                         cy_writeb(base_addr + (CyCAR << index),
3693                                   (u_char) channel);
3694                         if (info->rtsdtr_inv) {
3695                                 cy_writeb(base_addr + (CyMSVR1 << index),
3696                                           ~CyRTS);
3697                         } else {
3698                                 cy_writeb(base_addr + (CyMSVR2 << index),
3699                                           ~CyDTR);
3700                         }
3701
3702 #ifdef CY_DEBUG_DTR
3703                         printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3704                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3705                                 readb(base_addr + (CyMSVR1 << index)),
3706                                 readb(base_addr + (CyMSVR2 << index)));
3707 #endif
3708                         CY_UNLOCK(info, flags);
3709                 }
3710         } else {
3711                 base_addr = card->base_addr;
3712
3713                 firm_id = card->base_addr + ID_ADDRESS;
3714                 if (ISZLOADED(*card)) {
3715                         zfw_ctrl = card->base_addr +
3716                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3717                         board_ctrl = &zfw_ctrl->board_ctrl;
3718                         ch_ctrl = zfw_ctrl->ch_ctrl;
3719
3720                         if (set & TIOCM_RTS) {
3721                                 CY_LOCK(info, flags);
3722                                 cy_writel(&ch_ctrl[channel].rs_control,
3723                                         readl(&ch_ctrl[channel].rs_control) |
3724                                         C_RS_RTS);
3725                                 CY_UNLOCK(info, flags);
3726                         }
3727                         if (clear & TIOCM_RTS) {
3728                                 CY_LOCK(info, flags);
3729                                 cy_writel(&ch_ctrl[channel].rs_control,
3730                                         readl(&ch_ctrl[channel].rs_control) &
3731                                         ~C_RS_RTS);
3732                                 CY_UNLOCK(info, flags);
3733                         }
3734                         if (set & TIOCM_DTR) {
3735                                 CY_LOCK(info, flags);
3736                                 cy_writel(&ch_ctrl[channel].rs_control,
3737                                         readl(&ch_ctrl[channel].rs_control) |
3738                                         C_RS_DTR);
3739 #ifdef CY_DEBUG_DTR
3740                                 printk(KERN_DEBUG "cyc:set_modem_info raising "
3741                                         "Z DTR\n");
3742 #endif
3743                                 CY_UNLOCK(info, flags);
3744                         }
3745                         if (clear & TIOCM_DTR) {
3746                                 CY_LOCK(info, flags);
3747                                 cy_writel(&ch_ctrl[channel].rs_control,
3748                                         readl(&ch_ctrl[channel].rs_control) &
3749                                         ~C_RS_DTR);
3750 #ifdef CY_DEBUG_DTR
3751                                 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3752                                         "Z DTR\n");
3753 #endif
3754                                 CY_UNLOCK(info, flags);
3755                         }
3756                 } else {
3757                         return -ENODEV;
3758                 }
3759                 CY_LOCK(info, flags);
3760                 retval = cyz_issue_cmd(info->card,
3761                                         channel, C_CM_IOCTLM, 0L);
3762                 if (retval != 0) {
3763                         printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3764                                 "was %x\n", info->line, retval);
3765                 }
3766                 CY_UNLOCK(info, flags);
3767         }
3768         return 0;
3769 }                               /* cy_tiocmset */
3770
3771 /*
3772  * cy_break() --- routine which turns the break handling on or off
3773  */
3774 static void cy_break(struct tty_struct *tty, int break_state)
3775 {
3776         struct cyclades_port *info = tty->driver_data;
3777         unsigned long flags;
3778
3779         if (serial_paranoia_check(info, tty->name, "cy_break"))
3780                 return;
3781
3782         CY_LOCK(info, flags);
3783         if (!IS_CYC_Z(*info->card)) {
3784                 /* Let the transmit ISR take care of this (since it
3785                    requires stuffing characters into the output stream).
3786                  */
3787                 if (break_state == -1) {
3788                         if (!info->breakon) {
3789                                 info->breakon = 1;
3790                                 if (!info->xmit_cnt) {
3791                                         CY_UNLOCK(info, flags);
3792                                         start_xmit(info);
3793                                         CY_LOCK(info, flags);
3794                                 }
3795                         }
3796                 } else {
3797                         if (!info->breakoff) {
3798                                 info->breakoff = 1;
3799                                 if (!info->xmit_cnt) {
3800                                         CY_UNLOCK(info, flags);
3801                                         start_xmit(info);
3802                                         CY_LOCK(info, flags);
3803                                 }
3804                         }
3805                 }
3806         } else {
3807                 int retval;
3808
3809                 if (break_state == -1) {
3810                         retval = cyz_issue_cmd(info->card,
3811                                 info->line - info->card->first_line,
3812                                 C_CM_SET_BREAK, 0L);
3813                         if (retval != 0) {
3814                                 printk(KERN_ERR "cyc:cy_break (set) retval on "
3815                                         "ttyC%d was %x\n", info->line, retval);
3816                         }
3817                 } else {
3818                         retval = cyz_issue_cmd(info->card,
3819                                 info->line - info->card->first_line,
3820                                 C_CM_CLR_BREAK, 0L);
3821                         if (retval != 0) {
3822                                 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3823                                         "on ttyC%d was %x\n", info->line,
3824                                         retval);
3825                         }
3826                 }
3827         }
3828         CY_UNLOCK(info, flags);
3829 }                               /* cy_break */
3830
3831 static int
3832 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3833 {
3834
3835         if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3836                 return -EFAULT;
3837         info->mon.int_count = 0;
3838         info->mon.char_count = 0;
3839         info->mon.char_max = 0;
3840         info->mon.char_last = 0;
3841         return 0;
3842 }                               /* get_mon_info */
3843
3844 static int set_threshold(struct cyclades_port *info, unsigned long value)
3845 {
3846         struct cyclades_card *card;
3847         void __iomem *base_addr;
3848         int channel, chip, index;
3849         unsigned long flags;
3850
3851         card = info->card;
3852         channel = info->line - card->first_line;
3853         if (!IS_CYC_Z(*card)) {
3854                 chip = channel >> 2;
3855                 channel &= 0x03;
3856                 index = card->bus_index;
3857                 base_addr =
3858                     card->base_addr + (cy_chip_offset[chip] << index);
3859
3860                 info->cor3 &= ~CyREC_FIFO;
3861                 info->cor3 |= value & CyREC_FIFO;
3862
3863                 CY_LOCK(info, flags);
3864                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3865                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3866                 CY_UNLOCK(info, flags);
3867         } else {
3868                 /* Nothing to do! */
3869         }
3870         return 0;
3871 }                               /* set_threshold */
3872
3873 static int
3874 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3875 {
3876         struct cyclades_card *card;
3877         void __iomem *base_addr;
3878         int channel, chip, index;
3879         unsigned long tmp;
3880
3881         card = info->card;
3882         channel = info->line - card->first_line;
3883         if (!IS_CYC_Z(*card)) {
3884                 chip = channel >> 2;
3885                 channel &= 0x03;
3886                 index = card->bus_index;
3887                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3888
3889                 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3890                 return put_user(tmp, value);
3891         } else {
3892                 /* Nothing to do! */
3893                 return 0;
3894         }
3895 }                               /* get_threshold */
3896
3897 static int
3898 set_default_threshold(struct cyclades_port *info, unsigned long value)
3899 {
3900         info->default_threshold = value & 0x0f;
3901         return 0;
3902 }                               /* set_default_threshold */
3903
3904 static int
3905 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3906 {
3907         return put_user(info->default_threshold, value);
3908 }                               /* get_default_threshold */
3909
3910 static int set_timeout(struct cyclades_port *info, unsigned long value)
3911 {
3912         struct cyclades_card *card;
3913         void __iomem *base_addr;
3914         int channel, chip, index;
3915         unsigned long flags;
3916
3917         card = info->card;
3918         channel = info->line - card->first_line;
3919         if (!IS_CYC_Z(*card)) {
3920                 chip = channel >> 2;
3921                 channel &= 0x03;
3922                 index = card->bus_index;
3923                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3924
3925                 CY_LOCK(info, flags);
3926                 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3927                 CY_UNLOCK(info, flags);
3928         } else {
3929                 /* Nothing to do! */
3930         }
3931         return 0;
3932 }                               /* set_timeout */
3933
3934 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3935 {
3936         struct cyclades_card *card;
3937         void __iomem *base_addr;
3938         int channel, chip, index;
3939         unsigned long tmp;
3940
3941         card = info->card;
3942         channel = info->line - card->first_line;
3943         if (!IS_CYC_Z(*card)) {
3944                 chip = channel >> 2;
3945                 channel &= 0x03;
3946                 index = card->bus_index;
3947                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3948
3949                 tmp = readb(base_addr + (CyRTPR << index));
3950                 return put_user(tmp, value);
3951         } else {
3952                 /* Nothing to do! */
3953                 return 0;
3954         }
3955 }                               /* get_timeout */
3956
3957 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3958 {
3959         info->default_timeout = value & 0xff;
3960         return 0;
3961 }                               /* set_default_timeout */
3962
3963 static int
3964 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
3965 {
3966         return put_user(info->default_timeout, value);
3967 }                               /* get_default_timeout */
3968
3969 /*
3970  * This routine allows the tty driver to implement device-
3971  * specific ioctl's.  If the ioctl number passed in cmd is
3972  * not recognized by the driver, it should return ENOIOCTLCMD.
3973  */
3974 static int
3975 cy_ioctl(struct tty_struct *tty, struct file *file,
3976          unsigned int cmd, unsigned long arg)
3977 {
3978         struct cyclades_port *info = tty->driver_data;
3979         struct cyclades_icount cprev, cnow;     /* kernel counter temps */
3980         struct serial_icounter_struct __user *p_cuser;  /* user space */
3981         int ret_val = 0;
3982         unsigned long flags;
3983         void __user *argp = (void __user *)arg;
3984
3985         if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3986                 return -ENODEV;
3987
3988 #ifdef CY_DEBUG_OTHER
3989         printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3990                 info->line, cmd, arg);
3991 #endif
3992
3993         switch (cmd) {
3994         case CYGETMON:
3995                 ret_val = get_mon_info(info, argp);
3996                 break;
3997         case CYGETTHRESH:
3998                 ret_val = get_threshold(info, argp);
3999                 break;
4000         case CYSETTHRESH:
4001                 ret_val = set_threshold(info, arg);
4002                 break;
4003         case CYGETDEFTHRESH:
4004                 ret_val = get_default_threshold(info, argp);
4005                 break;
4006         case CYSETDEFTHRESH:
4007                 ret_val = set_default_threshold(info, arg);
4008                 break;
4009         case CYGETTIMEOUT:
4010                 ret_val = get_timeout(info, argp);
4011                 break;
4012         case CYSETTIMEOUT:
4013                 ret_val = set_timeout(info, arg);
4014                 break;
4015         case CYGETDEFTIMEOUT:
4016                 ret_val = get_default_timeout(info, argp);
4017                 break;
4018         case CYSETDEFTIMEOUT:
4019                 ret_val = set_default_timeout(info, arg);
4020                 break;
4021         case CYSETRFLOW:
4022                 info->rflow = (int)arg;
4023                 ret_val = 0;
4024                 break;
4025         case CYGETRFLOW:
4026                 ret_val = info->rflow;
4027                 break;
4028         case CYSETRTSDTR_INV:
4029                 info->rtsdtr_inv = (int)arg;
4030                 ret_val = 0;
4031                 break;
4032         case CYGETRTSDTR_INV:
4033                 ret_val = info->rtsdtr_inv;
4034                 break;
4035         case CYGETCD1400VER:
4036                 ret_val = info->chip_rev;
4037                 break;
4038 #ifndef CONFIG_CYZ_INTR
4039         case CYZSETPOLLCYCLE:
4040                 cyz_polling_cycle = (arg * HZ) / 1000;
4041                 ret_val = 0;
4042                 break;
4043         case CYZGETPOLLCYCLE:
4044                 ret_val = (cyz_polling_cycle * 1000) / HZ;
4045                 break;
4046 #endif                          /* CONFIG_CYZ_INTR */
4047         case CYSETWAIT:
4048                 info->closing_wait = (unsigned short)arg *HZ / 100;
4049                 ret_val = 0;
4050                 break;
4051         case CYGETWAIT:
4052                 ret_val = info->closing_wait / (HZ / 100);
4053                 break;
4054         case TIOCGSERIAL:
4055                 ret_val = get_serial_info(info, argp);
4056                 break;
4057         case TIOCSSERIAL:
4058                 ret_val = set_serial_info(info, argp);
4059                 break;
4060         case TIOCSERGETLSR:     /* Get line status register */
4061                 ret_val = get_lsr_info(info, argp);
4062                 break;
4063                 /*
4064                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4065                  * - mask passed in arg for lines of interest
4066                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4067                  * Caller should use TIOCGICOUNT to see which one it was
4068                  */
4069         case TIOCMIWAIT:
4070                 CY_LOCK(info, flags);
4071                 /* note the counters on entry */
4072                 cnow = info->icount;
4073                 CY_UNLOCK(info, flags);
4074                 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
4075                         cprev = cnow;
4076                         CY_LOCK(info, flags);
4077                         cnow = info->icount;    /* atomic copy */
4078                         CY_UNLOCK(info, flags);
4079
4080                         ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4081                         ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4082                         ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
4083                         ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4084                 }));
4085                 break;
4086
4087                 /*
4088                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4089                  * Return: write counters to the user passed counter struct
4090                  * NB: both 1->0 and 0->1 transitions are counted except for
4091                  *     RI where only 0->1 is counted.
4092                  */
4093         case TIOCGICOUNT:
4094                 CY_LOCK(info, flags);
4095                 cnow = info->icount;
4096                 CY_UNLOCK(info, flags);
4097                 p_cuser = argp;
4098                 ret_val = put_user(cnow.cts, &p_cuser->cts);
4099                 if (ret_val)
4100                         return ret_val;
4101                 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4102                 if (ret_val)
4103                         return ret_val;
4104                 ret_val = put_user(cnow.rng, &p_cuser->rng);
4105                 if (ret_val)
4106                         return ret_val;
4107                 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4108                 if (ret_val)
4109                         return ret_val;
4110                 ret_val = put_user(cnow.rx, &p_cuser->rx);
4111                 if (ret_val)
4112                         return ret_val;
4113                 ret_val = put_user(cnow.tx, &p_cuser->tx);
4114                 if (ret_val)
4115                         return ret_val;
4116                 ret_val = put_user(cnow.frame, &p_cuser->frame);
4117                 if (ret_val)
4118                         return ret_val;
4119                 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4120                 if (ret_val)
4121                         return ret_val;
4122                 ret_val = put_user(cnow.parity, &p_cuser->parity);
4123                 if (ret_val)
4124                         return ret_val;
4125                 ret_val = put_user(cnow.brk, &p_cuser->brk);
4126                 if (ret_val)
4127                         return ret_val;
4128                 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4129                 if (ret_val)
4130                         return ret_val;
4131                 ret_val = 0;
4132                 break;
4133         default:
4134                 ret_val = -ENOIOCTLCMD;
4135         }
4136
4137 #ifdef CY_DEBUG_OTHER
4138         printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4139 #endif
4140
4141         return ret_val;
4142 }                               /* cy_ioctl */
4143
4144 /*
4145  * This routine allows the tty driver to be notified when
4146  * device's termios settings have changed.  Note that a
4147  * well-designed tty driver should be prepared to accept the case
4148  * where old == NULL, and try to do something rational.
4149  */
4150 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4151 {
4152         struct cyclades_port *info = tty->driver_data;
4153
4154 #ifdef CY_DEBUG_OTHER
4155         printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4156 #endif
4157
4158         if (tty->termios->c_cflag == old_termios->c_cflag &&
4159                         (tty->termios->c_iflag & (IXON | IXANY)) ==
4160                         (old_termios->c_iflag & (IXON | IXANY)))
4161                 return;
4162         set_line_char(info);
4163
4164         if ((old_termios->c_cflag & CRTSCTS) &&
4165                         !(tty->termios->c_cflag & CRTSCTS)) {
4166                 tty->hw_stopped = 0;
4167                 cy_start(tty);
4168         }
4169 #if 0
4170         /*
4171          * No need to wake up processes in open wait, since they
4172          * sample the CLOCAL flag once, and don't recheck it.
4173          * XXX  It's not clear whether the current behavior is correct
4174          * or not.  Hence, this may change.....
4175          */
4176         if (!(old_termios->c_cflag & CLOCAL) &&
4177             (tty->termios->c_cflag & CLOCAL))
4178                 wake_up_interruptible(&info->open_wait);
4179 #endif
4180 }                               /* cy_set_termios */
4181
4182 /* This function is used to send a high-priority XON/XOFF character to
4183    the device.
4184 */
4185 static void cy_send_xchar(struct tty_struct *tty, char ch)
4186 {
4187         struct cyclades_port *info = tty->driver_data;
4188         struct cyclades_card *card;
4189         int channel;
4190
4191         if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4192                 return;
4193
4194         info->x_char = ch;
4195
4196         if (ch)
4197                 cy_start(tty);
4198
4199         card = info->card;
4200         channel = info->line - card->first_line;
4201
4202         if (IS_CYC_Z(*card)) {
4203                 if (ch == STOP_CHAR(tty))
4204                         cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4205                 else if (ch == START_CHAR(tty))
4206                         cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4207         }
4208 }
4209
4210 /* This routine is called by the upper-layer tty layer to signal
4211    that incoming characters should be throttled because the input
4212    buffers are close to full.
4213  */
4214 static void cy_throttle(struct tty_struct *tty)
4215 {
4216         struct cyclades_port *info = tty->driver_data;
4217         struct cyclades_card *card;
4218         unsigned long flags;
4219         void __iomem *base_addr;
4220         int chip, channel, index;
4221
4222 #ifdef CY_DEBUG_THROTTLE
4223         char buf[64];
4224
4225         printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4226                         tty->ldisc.chars_in_buffer(tty), info->line);
4227 #endif
4228
4229         if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4230                 return;
4231         }
4232
4233         card = info->card;
4234
4235         if (I_IXOFF(tty)) {
4236                 if (!IS_CYC_Z(*card))
4237                         cy_send_xchar(tty, STOP_CHAR(tty));
4238                 else
4239                         info->throttle = 1;
4240         }
4241
4242         if (tty->termios->c_cflag & CRTSCTS) {
4243                 channel = info->line - card->first_line;
4244                 if (!IS_CYC_Z(*card)) {
4245                         chip = channel >> 2;
4246                         channel &= 0x03;
4247                         index = card->bus_index;
4248                         base_addr = card->base_addr +
4249                                 (cy_chip_offset[chip] << index);
4250
4251                         CY_LOCK(info, flags);
4252                         cy_writeb(base_addr + (CyCAR << index),
4253                                   (u_char) channel);
4254                         if (info->rtsdtr_inv) {
4255                                 cy_writeb(base_addr + (CyMSVR2 << index),
4256                                           ~CyDTR);
4257                         } else {
4258                                 cy_writeb(base_addr + (CyMSVR1 << index),
4259                                           ~CyRTS);
4260                         }
4261                         CY_UNLOCK(info, flags);
4262                 } else {
4263                         info->throttle = 1;
4264                 }
4265         }
4266 }                               /* cy_throttle */
4267
4268 /*
4269  * This routine notifies the tty driver that it should signal
4270  * that characters can now be sent to the tty without fear of
4271  * overrunning the input buffers of the line disciplines.
4272  */
4273 static void cy_unthrottle(struct tty_struct *tty)
4274 {
4275         struct cyclades_port *info = tty->driver_data;
4276         struct cyclades_card *card;
4277         unsigned long flags;
4278         void __iomem *base_addr;
4279         int chip, channel, index;
4280
4281 #ifdef CY_DEBUG_THROTTLE
4282         char buf[64];
4283
4284         printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4285                 tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
4286 #endif
4287
4288         if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4289                 return;
4290         }
4291
4292         if (I_IXOFF(tty)) {
4293                 if (info->x_char)
4294                         info->x_char = 0;
4295                 else
4296                         cy_send_xchar(tty, START_CHAR(tty));
4297         }
4298
4299         if (tty->termios->c_cflag & CRTSCTS) {
4300                 card = info->card;
4301                 channel = info->line - card->first_line;
4302                 if (!IS_CYC_Z(*card)) {
4303                         chip = channel >> 2;
4304                         channel &= 0x03;
4305                         index = card->bus_index;
4306                         base_addr = card->base_addr +
4307                                 (cy_chip_offset[chip] << index);
4308
4309                         CY_LOCK(info, flags);
4310                         cy_writeb(base_addr + (CyCAR << index),
4311                                   (u_char) channel);
4312                         if (info->rtsdtr_inv) {
4313                                 cy_writeb(base_addr + (CyMSVR2 << index),
4314                                           CyDTR);
4315                         } else {
4316                                 cy_writeb(base_addr + (CyMSVR1 << index),
4317                                           CyRTS);
4318                         }
4319                         CY_UNLOCK(info, flags);
4320                 } else {
4321                         info->throttle = 0;
4322                 }
4323         }
4324 }                               /* cy_unthrottle */
4325
4326 /* cy_start and cy_stop provide software output flow control as a
4327    function of XON/XOFF, software CTS, and other such stuff.
4328 */
4329 static void cy_stop(struct tty_struct *tty)
4330 {
4331         struct cyclades_card *cinfo;
4332         struct cyclades_port *info = tty->driver_data;
4333         void __iomem *base_addr;
4334         int chip, channel, index;
4335         unsigned long flags;
4336
4337 #ifdef CY_DEBUG_OTHER
4338         printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4339 #endif
4340
4341         if (serial_paranoia_check(info, tty->name, "cy_stop"))
4342                 return;
4343
4344         cinfo = info->card;
4345         channel = info->line - cinfo->first_line;
4346         if (!IS_CYC_Z(*cinfo)) {
4347                 index = cinfo->bus_index;
4348                 chip = channel >> 2;
4349                 channel &= 0x03;
4350                 base_addr = info->card->base_addr +
4351                         (cy_chip_offset[chip] << index);
4352
4353                 CY_LOCK(info, flags);
4354                 cy_writeb(base_addr + (CyCAR << index),
4355                         (u_char)(channel & 0x0003)); /* index channel */
4356                 cy_writeb(base_addr + (CySRER << index),
4357                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4358                 CY_UNLOCK(info, flags);
4359         } else {
4360                 /* Nothing to do! */
4361         }
4362 }                               /* cy_stop */
4363
4364 static void cy_start(struct tty_struct *tty)
4365 {
4366         struct cyclades_card *cinfo;
4367         struct cyclades_port *info = tty->driver_data;
4368         void __iomem *base_addr;
4369         int chip, channel, index;
4370         unsigned long flags;
4371
4372 #ifdef CY_DEBUG_OTHER
4373         printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4374 #endif
4375
4376         if (serial_paranoia_check(info, tty->name, "cy_start"))
4377                 return;
4378
4379         cinfo = info->card;
4380         channel = info->line - cinfo->first_line;
4381         index = cinfo->bus_index;
4382         if (!IS_CYC_Z(*cinfo)) {
4383                 chip = channel >> 2;
4384                 channel &= 0x03;
4385                 base_addr = info->card->base_addr +
4386                         (cy_chip_offset[chip] << index);
4387
4388                 CY_LOCK(info, flags);
4389                 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003));   /* index channel */
4390                 cy_writeb(base_addr + (CySRER << index),
4391                           readb(base_addr + (CySRER << index)) | CyTxRdy);
4392                 CY_UNLOCK(info, flags);
4393         } else {
4394                 /* Nothing to do! */
4395         }
4396 }                               /* cy_start */
4397
4398 static void cy_flush_buffer(struct tty_struct *tty)
4399 {
4400         struct cyclades_port *info = tty->driver_data;
4401         struct cyclades_card *card;
4402         int channel, retval;
4403         unsigned long flags;
4404
4405 #ifdef CY_DEBUG_IO
4406         printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
4407 #endif
4408
4409         if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4410                 return;
4411
4412         card = info->card;
4413         channel = info->line - card->first_line;
4414
4415         CY_LOCK(info, flags);
4416         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4417         CY_UNLOCK(info, flags);
4418
4419         if (IS_CYC_Z(*card)) {  /* If it is a Z card, flush the on-board
4420                                            buffers as well */
4421                 CY_LOCK(info, flags);
4422                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4423                 if (retval != 0) {
4424                         printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4425                                 "was %x\n", info->line, retval);
4426                 }
4427                 CY_UNLOCK(info, flags);
4428         }
4429         tty_wakeup(tty);
4430 }                               /* cy_flush_buffer */
4431
4432 /*
4433  * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4434  */
4435 static void cy_hangup(struct tty_struct *tty)
4436 {
4437         struct cyclades_port *info = tty->driver_data;
4438
4439 #ifdef CY_DEBUG_OTHER
4440         printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4441 #endif
4442
4443         if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4444                 return;
4445
4446         cy_flush_buffer(tty);
4447         shutdown(info);
4448         info->event = 0;
4449         info->count = 0;
4450 #ifdef CY_DEBUG_COUNT
4451         printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4452                 current->pid);
4453 #endif
4454         info->tty = NULL;
4455         info->flags &= ~ASYNC_NORMAL_ACTIVE;
4456         wake_up_interruptible(&info->open_wait);
4457 }                               /* cy_hangup */
4458
4459 /*
4460  * ---------------------------------------------------------------------
4461  * cy_init() and friends
4462  *
4463  * cy_init() is called at boot-time to initialize the serial driver.
4464  * ---------------------------------------------------------------------
4465  */
4466
4467 static void __devinit cy_init_card(struct cyclades_card *cinfo)
4468 {
4469         struct cyclades_port *info;
4470         u32 mailbox;
4471         unsigned int nports;
4472         unsigned short chip_number;
4473         int index, port;
4474
4475         spin_lock_init(&cinfo->card_lock);
4476
4477         if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4478                 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4479                                      cinfo->ctl_addr)->mail_box_0);
4480                 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4481                 cinfo->intr_enabled = 0;
4482                 cinfo->nports = 0;      /* Will be correctly set later, after
4483                                            Z FW is loaded */
4484         } else {
4485                 index = cinfo->bus_index;
4486                 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4487         }
4488
4489         for (port = cinfo->first_line; port < cinfo->first_line + nports;
4490                         port++) {
4491                 info = &cy_port[port];
4492                 memset(info, 0, sizeof(*info));
4493                 info->magic = CYCLADES_MAGIC;
4494                 info->card = cinfo;
4495                 info->line = port;
4496                 info->flags = STD_COM_FLAGS;
4497                 info->closing_wait = CLOSING_WAIT_DELAY;
4498                 info->close_delay = 5 * HZ / 10;
4499
4500                 INIT_WORK(&info->tqueue, do_softint);
4501                 init_waitqueue_head(&info->open_wait);
4502                 init_waitqueue_head(&info->close_wait);
4503                 init_completion(&info->shutdown_wait);
4504                 init_waitqueue_head(&info->delta_msr_wait);
4505
4506                 if (IS_CYC_Z(*cinfo)) {
4507                         info->type = PORT_STARTECH;
4508                         if (mailbox == ZO_V1)
4509                                 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4510                         else
4511                                 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4512 #ifdef CONFIG_CYZ_INTR
4513                         setup_timer(&cyz_rx_full_timer[port],
4514                                 cyz_rx_restart, (unsigned long)info);
4515 #endif
4516                 } else {
4517                         info->type = PORT_CIRRUS;
4518                         info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4519                         info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4520                         info->cor2 = CyETC;
4521                         info->cor3 = 0x08;      /* _very_ small rcv threshold */
4522
4523                         chip_number = (port - cinfo->first_line) / 4;
4524                         if ((info->chip_rev = readb(cinfo->base_addr +
4525                                       (cy_chip_offset[chip_number] <<
4526                                        index) + (CyGFRCR << index))) >=
4527                             CD1400_REV_J) {
4528                                 /* It is a CD1400 rev. J or later */
4529                                 info->tbpr = baud_bpr_60[13];   /* Tx BPR */
4530                                 info->tco = baud_co_60[13];     /* Tx CO */
4531                                 info->rbpr = baud_bpr_60[13];   /* Rx BPR */
4532                                 info->rco = baud_co_60[13];     /* Rx CO */
4533                                 info->rtsdtr_inv = 1;
4534                         } else {
4535                                 info->tbpr = baud_bpr_25[13];   /* Tx BPR */
4536                                 info->tco = baud_co_25[13];     /* Tx CO */
4537                                 info->rbpr = baud_bpr_25[13];   /* Rx BPR */
4538                                 info->rco = baud_co_25[13];     /* Rx CO */
4539                                 info->rtsdtr_inv = 0;
4540                         }
4541                         info->read_status_mask = CyTIMEOUT | CySPECHAR |
4542                                 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4543                 }
4544
4545         }
4546
4547 #ifndef CONFIG_CYZ_INTR
4548         if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4549                 mod_timer(&cyz_timerlist, jiffies + 1);
4550 #ifdef CY_PCI_DEBUG
4551                 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4552 #endif
4553         }
4554 #endif
4555 }
4556
4557 /* initialize chips on Cyclom-Y card -- return number of valid
4558    chips (which is number of ports/4) */
4559 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4560                 int index)
4561 {
4562         unsigned int chip_number;
4563         void __iomem *base_addr;
4564
4565         cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4566         /* Cy_HwReset is 0x1400 */
4567         cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4568         /* Cy_ClrIntr is 0x1800 */
4569         udelay(500L);
4570
4571         for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4572                 base_addr =
4573                     true_base_addr + (cy_chip_offset[chip_number] << index);
4574                 mdelay(1);
4575                 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4576                         /*************
4577                         printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4578                         chip_number, (unsigned long)base_addr);
4579                         *************/
4580                         return chip_number;
4581                 }
4582
4583                 cy_writeb(base_addr + (CyGFRCR << index), 0);
4584                 udelay(10L);
4585
4586                 /* The Cyclom-16Y does not decode address bit 9 and therefore
4587                    cannot distinguish between references to chip 0 and a non-
4588                    existent chip 4.  If the preceding clearing of the supposed
4589                    chip 4 GFRCR register appears at chip 0, there is no chip 4
4590                    and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4591                  */
4592                 if (chip_number == 4 && readb(true_base_addr +
4593                                 (cy_chip_offset[0] << index) +
4594                                 (CyGFRCR << index)) == 0) {
4595                         return chip_number;
4596                 }
4597
4598                 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4599                 mdelay(1);
4600
4601                 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4602                         /*
4603                            printk(" chip #%d at %#6lx is not responding ",
4604                            chip_number, (unsigned long)base_addr);
4605                            printk("(GFRCR stayed 0)\n",
4606                          */
4607                         return chip_number;
4608                 }
4609                 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4610                                 0x40) {
4611                         /*
4612                         printk(" chip #%d at %#6lx is not valid (GFRCR == "
4613                                         "%#2x)\n",
4614                                         chip_number, (unsigned long)base_addr,
4615                                         base_addr[CyGFRCR<<index]);
4616                          */
4617                         return chip_number;
4618                 }
4619                 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4620                 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4621                         /* It is a CD1400 rev. J or later */
4622                         /* Impossible to reach 5ms with this chip.
4623                            Changed to 2ms instead (f = 500 Hz). */
4624                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4625                 } else {
4626                         /* f = 200 Hz */
4627                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4628                 }
4629
4630                 /*
4631                    printk(" chip #%d at %#6lx is rev 0x%2x\n",
4632                    chip_number, (unsigned long)base_addr,
4633                    readb(base_addr+(CyGFRCR<<index)));
4634                  */
4635         }
4636         return chip_number;
4637 }                               /* cyy_init_card */
4638
4639 /*
4640  * ---------------------------------------------------------------------
4641  * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4642  * sets global variables and return the number of ISA boards found.
4643  * ---------------------------------------------------------------------
4644  */
4645 static int __init cy_detect_isa(void)
4646 {
4647 #ifdef CONFIG_ISA
4648         unsigned short cy_isa_irq, nboard;
4649         void __iomem *cy_isa_address;
4650         unsigned short i, j, cy_isa_nchan;
4651 #ifdef MODULE
4652         int isparam = 0;
4653 #endif
4654
4655         nboard = 0;
4656
4657 #ifdef MODULE
4658         /* Check for module parameters */
4659         for (i = 0; i < NR_CARDS; i++) {
4660                 if (maddr[i] || i) {
4661                         isparam = 1;
4662                         cy_isa_addresses[i] = maddr[i];
4663                 }
4664                 if (!maddr[i])
4665                         break;
4666         }
4667 #endif
4668
4669         /* scan the address table probing for Cyclom-Y/ISA boards */
4670         for (i = 0; i < NR_ISA_ADDRS; i++) {
4671                 unsigned int isa_address = cy_isa_addresses[i];
4672                 if (isa_address == 0x0000) {
4673                         return nboard;
4674                 }
4675
4676                 /* probe for CD1400... */
4677                 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4678                 cy_isa_nchan = CyPORTS_PER_CHIP *
4679                         cyy_init_card(cy_isa_address, 0);
4680                 if (cy_isa_nchan == 0) {
4681                         continue;
4682                 }
4683 #ifdef MODULE
4684                 if (isparam && irq[i])
4685                         cy_isa_irq = irq[i];
4686                 else
4687 #endif
4688                         /* find out the board's irq by probing */
4689                         cy_isa_irq = detect_isa_irq(cy_isa_address);
4690                 if (cy_isa_irq == 0) {
4691                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4692                                 "IRQ could not be detected.\n",
4693                                 (unsigned long)cy_isa_address);
4694                         continue;
4695                 }
4696
4697                 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4698                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4699                                 "more channels are available. Change NR_PORTS "
4700                                 "in cyclades.c and recompile kernel.\n",
4701                                 (unsigned long)cy_isa_address);
4702                         return nboard;
4703                 }
4704                 /* fill the next cy_card structure available */
4705                 for (j = 0; j < NR_CARDS; j++) {
4706                         if (cy_card[j].base_addr == 0)
4707                                 break;
4708                 }
4709                 if (j == NR_CARDS) {    /* no more cy_cards available */
4710                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4711                                 "more cards can be used. Change NR_CARDS in "
4712                                 "cyclades.c and recompile kernel.\n",
4713                                 (unsigned long)cy_isa_address);
4714                         return nboard;
4715                 }
4716
4717                 /* allocate IRQ */
4718                 if (request_irq(cy_isa_irq, cyy_interrupt,
4719                                 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4720                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4721                                 "could not allocate IRQ#%d.\n",
4722                                 (unsigned long)cy_isa_address, cy_isa_irq);
4723                         return nboard;
4724                 }
4725
4726                 /* set cy_card */
4727                 cy_card[j].base_addr = cy_isa_address;
4728                 cy_card[j].ctl_addr = NULL;
4729                 cy_card[j].irq = (int)cy_isa_irq;
4730                 cy_card[j].bus_index = 0;
4731                 cy_card[j].first_line = cy_next_channel;
4732                 cy_card[j].num_chips = cy_isa_nchan / 4;
4733                 cy_init_card(&cy_card[j]);
4734                 nboard++;
4735
4736                 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4737                         "%d channels starting from port %d\n",
4738                         j + 1, (unsigned long)cy_isa_address,
4739                         (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4740                         cy_isa_irq, cy_isa_nchan, cy_next_channel);
4741
4742                 for (j = cy_next_channel;
4743                                 j < cy_next_channel + cy_isa_nchan; j++)
4744                         tty_register_device(cy_serial_driver, j, NULL);
4745                 cy_next_channel += cy_isa_nchan;
4746         }
4747         return nboard;
4748 #else
4749         return 0;
4750 #endif                          /* CONFIG_ISA */
4751 }                               /* cy_detect_isa */
4752
4753 #ifdef CONFIG_PCI
4754 static void __devinit plx_init(void __iomem * addr, __u32 initctl)
4755 {
4756         /* Reset PLX */
4757         cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
4758         udelay(100L);
4759         cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
4760
4761         /* Reload Config. Registers from EEPROM */
4762         cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
4763         udelay(100L);
4764         cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
4765 }
4766
4767 static int __devinit cy_init_Ze(struct RUNTIME_9060 __iomem *cy_pci_addr0,
4768                 int cy_pci_irq, struct pci_dev *pdev)
4769 {
4770         void __iomem *cy_pci_addr2;
4771         unsigned int j;
4772         unsigned short cy_pci_nchan;
4773
4774         cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ze_win);
4775
4776         readl(&cy_pci_addr0->mail_box_0);
4777         dev_dbg(&pdev->dev, "new Cyclades-Z board.  FPGA not loaded\n");
4778
4779         /* This must be the new Cyclades-Ze/PCI. */
4780         cy_pci_nchan = ZE_V1_NPORTS;
4781
4782         if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4783                 dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no channels "
4784                         "are available.\nChange NR_PORTS in cyclades.c "
4785                         "and recompile kernel.\n");
4786                 return -EIO;
4787         }
4788
4789         /* fill the next cy_card structure available */
4790         for (j = 0; j < NR_CARDS; j++) {
4791                 if (cy_card[j].base_addr == 0)
4792                         break;
4793         }
4794         if (j == NR_CARDS) {    /* no more cy_cards available */
4795                 dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no more "
4796                         "cards can be used.\nChange NR_CARDS in "
4797                         "cyclades.c and recompile kernel.\n");
4798                 return -EIO;
4799         }
4800 #ifdef CONFIG_CYZ_INTR
4801         /* allocate IRQ only if board has an IRQ */
4802         if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
4803                 if (request_irq(cy_pci_irq, cyz_interrupt,
4804                                 IRQF_SHARED, "Cyclades-Z",
4805                                 &cy_card[j])) {
4806                         dev_err(&pdev->dev, "could not allocate IRQ.\n");
4807                         return -EIO;
4808                 }
4809         }
4810 #endif                          /* CONFIG_CYZ_INTR */
4811
4812         /* set cy_card */
4813         cy_card[j].base_addr = cy_pci_addr2;
4814         cy_card[j].ctl_addr = cy_pci_addr0;
4815         cy_card[j].irq = cy_pci_irq;
4816         cy_card[j].bus_index = 1;
4817         cy_card[j].first_line = cy_next_channel;
4818         cy_card[j].num_chips = -1;
4819         cy_init_card(&cy_card[j]);
4820         pci_set_drvdata(pdev, &cy_card[j]);
4821
4822         dev_info(&pdev->dev, "Cyclades-Ze/PCI #%d found: %d channels starting "
4823                 "from port %d.\n", j + 1, cy_pci_nchan, cy_next_channel);
4824
4825         for (j = cy_next_channel; j < cy_next_channel + cy_pci_nchan; j++)
4826                 tty_register_device(cy_serial_driver, j, &pdev->dev);
4827         cy_next_channel += cy_pci_nchan;
4828
4829         return 0;
4830 }
4831
4832 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4833                 const struct pci_device_id *ent)
4834 {
4835         unsigned char cyy_rev_id;
4836         int cy_pci_irq;
4837         __u32 mailbox;
4838         void __iomem *cy_pci_addr0, *cy_pci_addr2;
4839         unsigned int device_id;
4840         unsigned short j, cy_pci_nchan, plx_ver;
4841         int retval;
4842
4843         retval = pci_enable_device(pdev);
4844         if (retval) {
4845                 dev_err(&pdev->dev, "cannot enable device\n");
4846                 return retval;
4847         }
4848
4849         /* read PCI configuration area */
4850         cy_pci_irq = pdev->irq;
4851         pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4852
4853         device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4854
4855         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4856                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4857                 dev_dbg(&pdev->dev, "Cyclom-Y/PCI found\n");
4858
4859                 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4860                         dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
4861                                 "set. Ignoring it...\n");
4862                         pdev->resource[2].flags &= ~IORESOURCE_IO;
4863                 }
4864
4865                 /* Although we don't use this I/O region, we should
4866                    request it from the kernel anyway, to avoid problems
4867                    with other drivers accessing it. */
4868                 retval = pci_request_regions(pdev, "Cyclom-Y");
4869                 if (retval) {
4870                         dev_err(&pdev->dev, "failed to reserve resources\n");
4871                         return retval;
4872                 }
4873 #if defined(__alpha__)
4874                 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {   /* below 1M? */
4875                         dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for "
4876                                 "low addresses on Alpha systems.\n");
4877                         return -EIO;
4878                 }
4879 #endif
4880                 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
4881                 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
4882
4883                 dev_dbg(&pdev->dev, "Cyclom-Y/PCI: relocate winaddr=0x%p "
4884                         "ctladdr=0x%p\n", cy_pci_addr2, cy_pci_addr0);
4885
4886                 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4887                                 cyy_init_card(cy_pci_addr2, 1));
4888                 if (cy_pci_nchan == 0) {
4889                         dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
4890                                         "Serial-Modules\n");
4891                         return -EIO;
4892                 }
4893                 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4894                         dev_err(&pdev->dev, "Cyclom-Y/PCI found, but no "
4895                                 "channels are available. Change NR_PORTS in "
4896                                 "cyclades.c and recompile kernel.\n");
4897                         return -EIO;
4898                 }
4899                 /* fill the next cy_card structure available */
4900                 for (j = 0; j < NR_CARDS; j++) {
4901                         if (cy_card[j].base_addr == 0)
4902                                 break;
4903                 }
4904                 if (j == NR_CARDS) {    /* no more cy_cards available */
4905                         dev_err(&pdev->dev, "Cyclom-Y/PCI found, but no more "
4906                                 "cards can be used. Change NR_CARDS in "
4907                                 "cyclades.c and recompile kernel.\n");
4908                         return -EIO;
4909                 }
4910
4911                 /* allocate IRQ */
4912                 retval = request_irq(cy_pci_irq, cyy_interrupt,
4913                                 IRQF_SHARED, "Cyclom-Y", &cy_card[j]);
4914                 if (retval) {
4915                         dev_err(&pdev->dev, "could not allocate IRQ\n");
4916                         return retval;
4917                 }
4918
4919                 /* set cy_card */
4920                 cy_card[j].base_addr = cy_pci_addr2;
4921                 cy_card[j].ctl_addr = cy_pci_addr0;
4922                 cy_card[j].irq = cy_pci_irq;
4923                 cy_card[j].bus_index = 1;
4924                 cy_card[j].first_line = cy_next_channel;
4925                 cy_card[j].num_chips = cy_pci_nchan / 4;
4926                 cy_init_card(&cy_card[j]);
4927                 pci_set_drvdata(pdev, &cy_card[j]);
4928
4929                 /* enable interrupts in the PCI interface */
4930                 plx_ver = readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4931                 switch (plx_ver) {
4932                 case PLX_9050:
4933
4934                         cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
4935                         break;
4936
4937                 case PLX_9060:
4938                 case PLX_9080:
4939                 default:        /* Old boards, use PLX_9060 */
4940
4941                         plx_init(cy_pci_addr0, 0x6c);
4942                 /* For some yet unknown reason, once the PLX9060 reloads
4943                    the EEPROM, the IRQ is lost and, thus, we have to
4944                    re-write it to the PCI config. registers.
4945                    This will remain here until we find a permanent
4946                    fix. */
4947                         pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4948                                         cy_pci_irq);
4949
4950                         cy_writew(cy_pci_addr0 + 0x68,
4951                                 readw(cy_pci_addr0 + 0x68) | 0x0900);
4952                         break;
4953                 }
4954
4955                 dev_info(&pdev->dev, "Cyclom-Y/PCI #%d found: %d channels "
4956                         "starting from port %d.\n", j + 1, cy_pci_nchan,
4957                         cy_next_channel);
4958
4959                 for (j = cy_next_channel;
4960                                 j < cy_next_channel + cy_pci_nchan; j++)
4961                         tty_register_device(cy_serial_driver, j, &pdev->dev);
4962
4963                 cy_next_channel += cy_pci_nchan;
4964         } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4965                 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for "
4966                         "low addresses\n");
4967                 return -EIO;
4968         } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
4969                 dev_dbg(&pdev->dev, "Cyclades-Z/PCI found\n");
4970
4971                 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
4972
4973                 /* Disable interrupts on the PLX before resetting it */
4974                 cy_writew(cy_pci_addr0 + 0x68,
4975                         readw(cy_pci_addr0 + 0x68) & ~0x0900);
4976
4977                 plx_init(cy_pci_addr0, 0x6c);
4978                 /* For some yet unknown reason, once the PLX9060 reloads
4979                    the EEPROM, the IRQ is lost and, thus, we have to
4980                    re-write it to the PCI config. registers.
4981                    This will remain here until we find a permanent
4982                    fix. */
4983                 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
4984
4985                 mailbox = (__u32)readl(&((struct RUNTIME_9060 __iomem *)
4986                                 cy_pci_addr0)->mail_box_0);
4987
4988                 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4989                         dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
4990                                 "set. Ignoring it...\n");
4991                         pdev->resource[2].flags &= ~IORESOURCE_IO;
4992                 }
4993
4994                 /* Although we don't use this I/O region, we should
4995                    request it from the kernel anyway, to avoid problems
4996                    with other drivers accessing it. */
4997                 retval = pci_request_regions(pdev, "Cyclades-Z");
4998                 if (retval) {
4999                         dev_err(&pdev->dev, "failed to reserve resources\n");
5000                         return retval;
5001                 }
5002
5003                 if (mailbox == ZE_V1) {
5004                         retval = cy_init_Ze(cy_pci_addr0, cy_pci_irq, pdev);
5005                         return retval;
5006                 } else {
5007                         cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Zwin);
5008                 }
5009
5010                 dev_dbg(&pdev->dev, "Cyclades-Z/PCI: relocate winaddr=0x%p "
5011                         "ctladdr=0x%p\n", cy_pci_addr2, cy_pci_addr0);
5012 #ifdef CY_PCI_DEBUG
5013                 if (mailbox == ZO_V1) {
5014                         cy_writel(&((struct RUNTIME_9060 *)
5015                                 (cy_pci_addr0))->loc_addr_base,
5016                                 WIN_CREG);
5017                         dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA id %lx, "
5018                                 "ver %lx\n", (ulong)(0xff &
5019                                 readl(&((struct CUSTOM_REG *)
5020                                         cy_pci_addr2)->fpga_id)),
5021                                 (ulong)(0xff & readl(&((struct CUSTOM_REG *)
5022                                         cy_pci_addr2)->fpga_version)));
5023                         cy_writel(&((struct RUNTIME_9060 *)
5024                                 cy_pci_addr0)->loc_addr_base, WIN_RAM);
5025                 } else {
5026                         dev_info(&pdev->dev, "Cyclades-Z/PCI: New Cyclades-Z "
5027                                 "board.  FPGA not loaded\n");
5028                 }
5029 #endif
5030                 /* The following clears the firmware id word.  This
5031                    ensures that the driver will not attempt to talk to
5032                    the board until it has been properly initialized.
5033                  */
5034                 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5035                         cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5036
5037                 /* This must be a Cyclades-8Zo/PCI.  The extendable
5038                    version will have a different device_id and will
5039                    be allocated its maximum number of ports. */
5040                 cy_pci_nchan = 8;
5041
5042                 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5043                         dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5044                                 "channels are available. Change NR_PORTS in "
5045                                 "cyclades.c and recompile kernel.\n");
5046                         return -EIO;
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                         dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5056                                 "more cards can be used. Change NR_CARDS in "
5057                                 "cyclades.c and recompile kernel.\n");
5058                         return -EIO;
5059                 }
5060 #ifdef CONFIG_CYZ_INTR
5061                 /* allocate IRQ only if board has an IRQ */
5062                 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5063                         retval = request_irq(cy_pci_irq, cyz_interrupt,
5064                                         IRQF_SHARED, "Cyclades-Z",
5065                                         &cy_card[j]);
5066                         if (retval) {
5067                                 dev_err(&pdev->dev, "could not allocate IRQ\n");
5068                                 return retval;
5069                         }
5070                 }
5071 #endif                          /* CONFIG_CYZ_INTR */
5072
5073                 /* set cy_card */
5074                 cy_card[j].base_addr = cy_pci_addr2;
5075                 cy_card[j].ctl_addr = cy_pci_addr0;
5076                 cy_card[j].irq = cy_pci_irq;
5077                 cy_card[j].bus_index = 1;
5078                 cy_card[j].first_line = cy_next_channel;
5079                 cy_card[j].num_chips = -1;
5080                 cy_init_card(&cy_card[j]);
5081                 pci_set_drvdata(pdev, &cy_card[j]);
5082
5083                 dev_info(&pdev->dev, "Cyclades-8Zo/PCI #%d found: %d channels "
5084                         "starting from port %d.\n", j + 1, cy_pci_nchan,
5085                         cy_next_channel);
5086
5087                 for (j = cy_next_channel;
5088                                 j < cy_next_channel + cy_pci_nchan; j++)
5089                         tty_register_device(cy_serial_driver, j, &pdev->dev);
5090                 cy_next_channel += cy_pci_nchan;
5091         }
5092
5093         return 0;
5094 }
5095
5096 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5097 {
5098         struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5099         unsigned int i;
5100
5101         /* non-Z with old PLX */
5102         if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5103                         PLX_9050)
5104                 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5105         else
5106 #ifndef CONFIG_CYZ_INTR
5107                 if (!IS_CYC_Z(*cinfo))
5108 #endif
5109                 cy_writew(cinfo->ctl_addr + 0x68,
5110                                 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5111
5112         pci_iounmap(pdev, cinfo->base_addr);
5113         if (cinfo->ctl_addr)
5114                 pci_iounmap(pdev, cinfo->ctl_addr);
5115         if (cinfo->irq
5116 #ifndef CONFIG_CYZ_INTR
5117                 && !IS_CYC_Z(*cinfo)
5118 #endif /* CONFIG_CYZ_INTR */
5119                 )
5120                 free_irq(cinfo->irq, cinfo);
5121         pci_release_regions(pdev);
5122
5123         cinfo->base_addr = NULL;
5124         for (i = cinfo->first_line; i < cinfo->first_line + cinfo->nports; i++){
5125                 cy_port[i].line = -1;
5126                 cy_port[i].magic = -1;
5127         }
5128         for (i = cinfo->first_line; i < cinfo->first_line +
5129                         cinfo->nports; i++)
5130                 tty_unregister_device(cy_serial_driver, i);
5131 }
5132
5133 static struct pci_driver cy_pci_driver = {
5134         .name = "cyclades",
5135         .id_table = cy_pci_dev_id,
5136         .probe = cy_pci_probe,
5137         .remove = __devexit_p(cy_pci_remove)
5138 };
5139 #endif
5140
5141 static int
5142 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5143                 int *eof, void *data)
5144 {
5145         struct cyclades_port *info;
5146         int i;
5147         int len = 0;
5148         off_t begin = 0;
5149         off_t pos = 0;
5150         int size;
5151         __u32 cur_jifs = jiffies;
5152
5153         size = sprintf(buf, "Dev TimeOpen   BytesOut  IdleOut    BytesIn   "
5154                         "IdleIn  Overruns  Ldisc\n");
5155
5156         pos += size;
5157         len += size;
5158
5159         /* Output one line for each known port */
5160         for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5161                 info = &cy_port[i];
5162
5163                 if (info->count)
5164                         size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5165                                 "%8lu %9lu %6ld\n", info->line,
5166                                 (cur_jifs - info->idle_stats.in_use) / HZ,
5167                                 info->idle_stats.xmit_bytes,
5168                                 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
5169                                 info->idle_stats.recv_bytes,
5170                                 (cur_jifs - info->idle_stats.recv_idle) / HZ,
5171                                 info->idle_stats.overruns,
5172                                 (long)info->tty->ldisc.num);
5173                 else
5174                         size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5175                                 "%8lu %9lu %6ld\n",
5176                                 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5177                 len += size;
5178                 pos = begin + len;
5179
5180                 if (pos < offset) {
5181                         len = 0;
5182                         begin = pos;
5183                 }
5184                 if (pos > offset + length)
5185                         goto done;
5186         }
5187         *eof = 1;
5188 done:
5189         *start = buf + (offset - begin);        /* Start of wanted data */
5190         len -= (offset - begin);        /* Start slop */
5191         if (len > length)
5192                 len = length;   /* Ending slop */
5193         if (len < 0)
5194                 len = 0;
5195         return len;
5196 }
5197
5198 /* The serial driver boot-time initialization code!
5199     Hardware I/O ports are mapped to character special devices on a
5200     first found, first allocated manner.  That is, this code searches
5201     for Cyclom cards in the system.  As each is found, it is probed
5202     to discover how many chips (and thus how many ports) are present.
5203     These ports are mapped to the tty ports 32 and upward in monotonic
5204     fashion.  If an 8-port card is replaced with a 16-port card, the
5205     port mapping on a following card will shift.
5206
5207     This approach is different from what is used in the other serial
5208     device driver because the Cyclom is more properly a multiplexer,
5209     not just an aggregation of serial ports on one card.
5210
5211     If there are more cards with more ports than have been
5212     statically allocated above, a warning is printed and the
5213     extra ports are ignored.
5214  */
5215
5216 static const struct tty_operations cy_ops = {
5217         .open = cy_open,
5218         .close = cy_close,
5219         .write = cy_write,
5220         .put_char = cy_put_char,
5221         .flush_chars = cy_flush_chars,
5222         .write_room = cy_write_room,
5223         .chars_in_buffer = cy_chars_in_buffer,
5224         .flush_buffer = cy_flush_buffer,
5225         .ioctl = cy_ioctl,
5226         .throttle = cy_throttle,
5227         .unthrottle = cy_unthrottle,
5228         .set_termios = cy_set_termios,
5229         .stop = cy_stop,
5230         .start = cy_start,
5231         .hangup = cy_hangup,
5232         .break_ctl = cy_break,
5233         .wait_until_sent = cy_wait_until_sent,
5234         .read_proc = cyclades_get_proc_info,
5235         .tiocmget = cy_tiocmget,
5236         .tiocmset = cy_tiocmset,
5237 };
5238
5239 static int __init cy_init(void)
5240 {
5241         unsigned int i, nboards;
5242         int retval = -ENOMEM;
5243
5244         cy_serial_driver = alloc_tty_driver(NR_PORTS);
5245         if (!cy_serial_driver)
5246                 goto err;
5247
5248         printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5249                         __DATE__, __TIME__);
5250
5251         /* Initialize the tty_driver structure */
5252
5253         cy_serial_driver->owner = THIS_MODULE;
5254         cy_serial_driver->driver_name = "cyclades";
5255         cy_serial_driver->name = "ttyC";
5256         cy_serial_driver->major = CYCLADES_MAJOR;
5257         cy_serial_driver->minor_start = 0;
5258         cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5259         cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5260         cy_serial_driver->init_termios = tty_std_termios;
5261         cy_serial_driver->init_termios.c_cflag =
5262             B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5263         cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5264         tty_set_operations(cy_serial_driver, &cy_ops);
5265
5266         retval = tty_register_driver(cy_serial_driver);
5267         if (retval) {
5268                 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5269                 goto err_frtty;
5270         }
5271
5272         for (i = 0; i < NR_PORTS; i++) {
5273                 cy_port[i].line = -1;
5274                 cy_port[i].magic = -1;
5275         }
5276
5277         /* the code below is responsible to find the boards. Each different
5278            type of board has its own detection routine. If a board is found,
5279            the next cy_card structure available is set by the detection
5280            routine. These functions are responsible for checking the
5281            availability of cy_card and cy_port data structures and updating
5282            the cy_next_channel. */
5283
5284         /* look for isa boards */
5285         nboards = cy_detect_isa();
5286
5287 #ifdef CONFIG_PCI
5288         /* look for pci boards */
5289         retval = pci_register_driver(&cy_pci_driver);
5290         if (retval && !nboards)
5291                 goto err_unr;
5292 #endif
5293
5294         return 0;
5295 err_unr:
5296         tty_unregister_driver(cy_serial_driver);
5297 err_frtty:
5298         put_tty_driver(cy_serial_driver);
5299 err:
5300         return retval;
5301 }                               /* cy_init */
5302
5303 static void __exit cy_cleanup_module(void)
5304 {
5305         int i, e1;
5306
5307 #ifndef CONFIG_CYZ_INTR
5308         del_timer_sync(&cyz_timerlist);
5309 #endif /* CONFIG_CYZ_INTR */
5310
5311         if ((e1 = tty_unregister_driver(cy_serial_driver)))
5312                 printk(KERN_ERR "failed to unregister Cyclades serial "
5313                                 "driver(%d)\n", e1);
5314
5315         put_tty_driver(cy_serial_driver);
5316
5317 #ifdef CONFIG_PCI
5318         pci_unregister_driver(&cy_pci_driver);
5319 #endif
5320
5321         for (i = 0; i < NR_CARDS; i++) {
5322                 if (cy_card[i].base_addr) {
5323                         /* clear interrupt */
5324                         cy_writeb(cy_card[i].base_addr + Cy_ClrIntr, 0);
5325                         iounmap(cy_card[i].base_addr);
5326                         if (cy_card[i].ctl_addr)
5327                                 iounmap(cy_card[i].ctl_addr);
5328                         if (cy_card[i].irq
5329 #ifndef CONFIG_CYZ_INTR
5330                                 && !IS_CYC_Z(cy_card[i])
5331 #endif /* CONFIG_CYZ_INTR */
5332                                 )
5333                                 free_irq(cy_card[i].irq, &cy_card[i]);
5334                         for (e1 = cy_card[i].first_line;
5335                                         e1 < cy_card[i].first_line +
5336                                         cy_card[i].nports; e1++)
5337                                 tty_unregister_device(cy_serial_driver, e1);
5338                 }
5339         }
5340 } /* cy_cleanup_module */
5341
5342 module_init(cy_init);
5343 module_exit(cy_cleanup_module);
5344
5345 MODULE_LICENSE("GPL");