drivers/usb/serial/ti_usb_3410_5052.c

   1 /* vi: ts=8 sw=8
   2  *
   3  * TI 3410/5052 USB Serial Driver
   4  *
   5  * Copyright (C) 2004 Texas Instruments
   6  *
   7  * This driver is based on the Linux io_ti driver, which is
   8  *   Copyright (C) 2000-2002 Inside Out Networks
   9  *   Copyright (C) 2001-2002 Greg Kroah-Hartman
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * For questions or problems with this driver, contact Texas Instruments
  17  * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
  18  * Peter Berger <pberger@brimson.com>.
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <linux/errno.h>
  23 #include <linux/firmware.h>
  24 #include <linux/init.h>
  25 #include <linux/slab.h>
  26 #include <linux/tty.h>
  27 #include <linux/tty_driver.h>
  28 #include <linux/tty_flip.h>
  29 #include <linux/module.h>
  30 #include <linux/spinlock.h>
  31 #include <linux/ioctl.h>
  32 #include <linux/serial.h>
  33 #include <linux/kfifo.h>
  34 #include <linux/mutex.h>
  35 #include <linux/uaccess.h>
  36 #include <linux/usb.h>
  37 #include <linux/usb/serial.h>
  38
  39 #include "ti_usb_3410_5052.h"
  40
  41 /* Defines */
  42
  43 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
  44 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
  45
  46 #define TI_FIRMWARE_BUF_SIZE    16284
  47
  48 #define TI_WRITE_BUF_SIZE       1024
  49
  50 #define TI_TRANSFER_TIMEOUT     2
  51
  52 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
  53
  54 /* supported setserial flags */
  55 #define TI_SET_SERIAL_FLAGS     0
  56
  57 /* read urb states */
  58 #define TI_READ_URB_RUNNING     0
  59 #define TI_READ_URB_STOPPING    1
  60 #define TI_READ_URB_STOPPED     2
  61
  62 #define TI_EXTRA_VID_PID_COUNT  5
  63
  64
  65 /* Structures */
  66
  67 struct ti_port {
  68         int                     tp_is_open;
  69         __u8                    tp_msr;
  70         __u8                    tp_lsr;
  71         __u8                    tp_shadow_mcr;
  72         __u8                    tp_uart_mode;   /* 232 or 485 modes */
  73         unsigned int            tp_uart_base_addr;
  74         int                     tp_flags;
  75         int                     tp_closing_wait;/* in .01 secs */
  76         struct async_icount     tp_icount;
  77         wait_queue_head_t       tp_msr_wait;    /* wait for msr change */
  78         wait_queue_head_t       tp_write_wait;
  79         struct ti_device        *tp_tdev;
  80         struct usb_serial_port  *tp_port;
  81         spinlock_t              tp_lock;
  82         int                     tp_read_urb_state;
  83         int                     tp_write_urb_in_use;
  84         struct kfifo            write_fifo;
  85 };
  86
  87 struct ti_device {
  88         struct mutex            td_open_close_lock;
  89         int                     td_open_port_count;
  90         struct usb_serial       *td_serial;
  91         int                     td_is_3410;
  92         int                     td_urb_error;
  93 };
  94
  95
  96 /* Function Declarations */
  97
  98 static int ti_startup(struct usb_serial *serial);
  99 static void ti_release(struct usb_serial *serial);
 100 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
 101 static void ti_close(struct usb_serial_port *port);
 102 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 103                 const unsigned char *data, int count);
 104 static int ti_write_room(struct tty_struct *tty);
 105 static int ti_chars_in_buffer(struct tty_struct *tty);
 106 static void ti_throttle(struct tty_struct *tty);
 107 static void ti_unthrottle(struct tty_struct *tty);
 108 static int ti_ioctl(struct tty_struct *tty,
 109                 unsigned int cmd, unsigned long arg);
 110 static int ti_get_icount(struct tty_struct *tty,
 111                 struct serial_icounter_struct *icount);
 112 static void ti_set_termios(struct tty_struct *tty,
 113                 struct usb_serial_port *port, struct ktermios *old_termios);
 114 static int ti_tiocmget(struct tty_struct *tty);
 115 static int ti_tiocmset(struct tty_struct *tty,
 116                 unsigned int set, unsigned int clear);
 117 static void ti_break(struct tty_struct *tty, int break_state);
 118 static void ti_interrupt_callback(struct urb *urb);
 119 static void ti_bulk_in_callback(struct urb *urb);
 120 static void ti_bulk_out_callback(struct urb *urb);
 121
 122 static void ti_recv(struct device *dev, struct tty_struct *tty,
 123         unsigned char *data, int length);
 124 static void ti_send(struct ti_port *tport);
 125 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 126 static int ti_get_lsr(struct ti_port *tport);
 127 static int ti_get_serial_info(struct ti_port *tport,
 128         struct serial_struct __user *ret_arg);
 129 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 130         struct serial_struct __user *new_arg);
 131 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 132
 133 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
 134
 135 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 136 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 137
 138 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 139         __u16 moduleid, __u16 value, __u8 *data, int size);
 140 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 141         __u16 moduleid, __u16 value, __u8 *data, int size);
 142
 143 static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev,
 144                          unsigned long addr, __u8 mask, __u8 byte);
 145
 146 static int ti_download_firmware(struct ti_device *tdev);
 147
 148
 149 /* Data */
 150
 151 /* module parameters */
 152 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 153 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
 154 static unsigned int vendor_3410_count;
 155 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
 156 static unsigned int product_3410_count;
 157 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
 158 static unsigned int vendor_5052_count;
 159 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
 160 static unsigned int product_5052_count;
 161
 162 /* supported devices */
 163 /* the array dimension is the number of default entries plus */
 164 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
 165 /* null entry */
 166 static struct usb_device_id ti_id_table_3410[15+TI_EXTRA_VID_PID_COUNT+1] = {
 167         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 168         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 169         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 170         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 171         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 172         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 173         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 174         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 175         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 176         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 177         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 178         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 179         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 180         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 181         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 182 };
 183
 184 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
 185         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 186         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 187         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 188         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 189 };
 190
 191 static struct usb_device_id ti_id_table_combined[19+2*TI_EXTRA_VID_PID_COUNT+1] = {
 192         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 193         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 194         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 195         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 196         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 197         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 198         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 199         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 200         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 201         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 202         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 203         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 204         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 205         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 206         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 207         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 208         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 209         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 210         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 211         { }
 212 };
 213
 214 static struct usb_serial_driver ti_1port_device = {
 215         .driver = {
 216                 .owner          = THIS_MODULE,
 217                 .name           = "ti_usb_3410_5052_1",
 218         },
 219         .description            = "TI USB 3410 1 port adapter",
 220         .id_table               = ti_id_table_3410,
 221         .num_ports              = 1,
 222         .attach                 = ti_startup,
 223         .release                = ti_release,
 224         .open                   = ti_open,
 225         .close                  = ti_close,
 226         .write                  = ti_write,
 227         .write_room             = ti_write_room,
 228         .chars_in_buffer        = ti_chars_in_buffer,
 229         .throttle               = ti_throttle,
 230         .unthrottle             = ti_unthrottle,
 231         .ioctl                  = ti_ioctl,
 232         .set_termios            = ti_set_termios,
 233         .tiocmget               = ti_tiocmget,
 234         .tiocmset               = ti_tiocmset,
 235         .get_icount             = ti_get_icount,
 236         .break_ctl              = ti_break,
 237         .read_int_callback      = ti_interrupt_callback,
 238         .read_bulk_callback     = ti_bulk_in_callback,
 239         .write_bulk_callback    = ti_bulk_out_callback,
 240 };
 241
 242 static struct usb_serial_driver ti_2port_device = {
 243         .driver = {
 244                 .owner          = THIS_MODULE,
 245                 .name           = "ti_usb_3410_5052_2",
 246         },
 247         .description            = "TI USB 5052 2 port adapter",
 248         .id_table               = ti_id_table_5052,
 249         .num_ports              = 2,
 250         .attach                 = ti_startup,
 251         .release                = ti_release,
 252         .open                   = ti_open,
 253         .close                  = ti_close,
 254         .write                  = ti_write,
 255         .write_room             = ti_write_room,
 256         .chars_in_buffer        = ti_chars_in_buffer,
 257         .throttle               = ti_throttle,
 258         .unthrottle             = ti_unthrottle,
 259         .ioctl                  = ti_ioctl,
 260         .set_termios            = ti_set_termios,
 261         .tiocmget               = ti_tiocmget,
 262         .tiocmset               = ti_tiocmset,
 263         .get_icount             = ti_get_icount,
 264         .break_ctl              = ti_break,
 265         .read_int_callback      = ti_interrupt_callback,
 266         .read_bulk_callback     = ti_bulk_in_callback,
 267         .write_bulk_callback    = ti_bulk_out_callback,
 268 };
 269
 270 static struct usb_serial_driver * const serial_drivers[] = {
 271         &ti_1port_device, &ti_2port_device, NULL
 272 };
 273
 274 /* Module */
 275
 276 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 277 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 278 MODULE_LICENSE("GPL");
 279
 280 MODULE_FIRMWARE("ti_3410.fw");
 281 MODULE_FIRMWARE("ti_5052.fw");
 282 MODULE_FIRMWARE("mts_cdma.fw");
 283 MODULE_FIRMWARE("mts_gsm.fw");
 284 MODULE_FIRMWARE("mts_edge.fw");
 285 MODULE_FIRMWARE("mts_mt9234mu.fw");
 286 MODULE_FIRMWARE("mts_mt9234zba.fw");
 287
 288 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 289 MODULE_PARM_DESC(closing_wait,
 290     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 291
 292 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 293 MODULE_PARM_DESC(vendor_3410,
 294                 "Vendor ids for 3410 based devices, 1-5 short integers");
 295 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 296 MODULE_PARM_DESC(product_3410,
 297                 "Product ids for 3410 based devices, 1-5 short integers");
 298 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 299 MODULE_PARM_DESC(vendor_5052,
 300                 "Vendor ids for 5052 based devices, 1-5 short integers");
 301 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 302 MODULE_PARM_DESC(product_5052,
 303                 "Product ids for 5052 based devices, 1-5 short integers");
 304
 305 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 306
 307
 308 /* Functions */
 309
 310 static int __init ti_init(void)
 311 {
 312         int i, j, c;
 313
 314         /* insert extra vendor and product ids */
 315         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 316         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 317         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 318                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 319                 ti_id_table_3410[j].idProduct = product_3410[i];
 320                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 321                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 322                 ti_id_table_combined[c].idProduct = product_3410[i];
 323                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 324         }
 325         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 326         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 327                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 328                 ti_id_table_5052[j].idProduct = product_5052[i];
 329                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 330                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 331                 ti_id_table_combined[c].idProduct = product_5052[i];
 332                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 333         }
 334
 335         return usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, ti_id_table_combined);
 336 }
 337
 338 static void __exit ti_exit(void)
 339 {
 340         usb_serial_deregister_drivers(serial_drivers);
 341 }
 342
 343 module_init(ti_init);
 344 module_exit(ti_exit);
 345
 346
 347 static int ti_startup(struct usb_serial *serial)
 348 {
 349         struct ti_device *tdev;
 350         struct ti_port *tport;
 351         struct usb_device *dev = serial->dev;
 352         int status;
 353         int i;
 354
 355
 356         dev_dbg(&dev->dev,
 357                 "%s - product 0x%4X, num configurations %d, configuration value %d",
 358                 __func__, le16_to_cpu(dev->descriptor.idProduct),
 359                 dev->descriptor.bNumConfigurations,
 360                 dev->actconfig->desc.bConfigurationValue);
 361
 362         /* create device structure */
 363         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 364         if (tdev == NULL) {
 365                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 366                 return -ENOMEM;
 367         }
 368         mutex_init(&tdev->td_open_close_lock);
 369         tdev->td_serial = serial;
 370         usb_set_serial_data(serial, tdev);
 371
 372         /* determine device type */
 373         if (usb_match_id(serial->interface, ti_id_table_3410))
 374                 tdev->td_is_3410 = 1;
 375         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
 376                 tdev->td_is_3410 ? "3410" : "5052");
 377
 378         /* if we have only 1 configuration, download firmware */
 379         if (dev->descriptor.bNumConfigurations == 1) {
 380                 status = ti_download_firmware(tdev);
 381
 382                 if (status != 0)
 383                         goto free_tdev;
 384
 385                 /* 3410 must be reset, 5052 resets itself */
 386                 if (tdev->td_is_3410) {
 387                         msleep_interruptible(100);
 388                         usb_reset_device(dev);
 389                 }
 390
 391                 status = -ENODEV;
 392                 goto free_tdev;
 393         }
 394
 395         /* the second configuration must be set */
 396         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 397                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 398                 status = status ? status : -ENODEV;
 399                 goto free_tdev;
 400         }
 401
 402         /* set up port structures */
 403         for (i = 0; i < serial->num_ports; ++i) {
 404                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
 405                 if (tport == NULL) {
 406                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 407                         status = -ENOMEM;
 408                         goto free_tports;
 409                 }
 410                 spin_lock_init(&tport->tp_lock);
 411                 tport->tp_uart_base_addr = (i == 0 ?
 412                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
 413                 tport->tp_closing_wait = closing_wait;
 414                 init_waitqueue_head(&tport->tp_msr_wait);
 415                 init_waitqueue_head(&tport->tp_write_wait);
 416                 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
 417                                                                 GFP_KERNEL)) {
 418                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 419                         kfree(tport);
 420                         status = -ENOMEM;
 421                         goto free_tports;
 422                 }
 423                 tport->tp_port = serial->port[i];
 424                 tport->tp_tdev = tdev;
 425                 usb_set_serial_port_data(serial->port[i], tport);
 426                 tport->tp_uart_mode = 0;        /* default is RS232 */
 427         }
 428
 429         return 0;
 430
 431 free_tports:
 432         for (--i; i >= 0; --i) {
 433                 tport = usb_get_serial_port_data(serial->port[i]);
 434                 kfifo_free(&tport->write_fifo);
 435                 kfree(tport);
 436                 usb_set_serial_port_data(serial->port[i], NULL);
 437         }
 438 free_tdev:
 439         kfree(tdev);
 440         usb_set_serial_data(serial, NULL);
 441         return status;
 442 }
 443
 444
 445 static void ti_release(struct usb_serial *serial)
 446 {
 447         int i;
 448         struct ti_device *tdev = usb_get_serial_data(serial);
 449         struct ti_port *tport;
 450
 451         for (i = 0; i < serial->num_ports; ++i) {
 452                 tport = usb_get_serial_port_data(serial->port[i]);
 453                 if (tport) {
 454                         kfifo_free(&tport->write_fifo);
 455                         kfree(tport);
 456                 }
 457         }
 458
 459         kfree(tdev);
 460 }
 461
 462
 463 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 464 {
 465         struct ti_port *tport = usb_get_serial_port_data(port);
 466         struct ti_device *tdev;
 467         struct usb_device *dev;
 468         struct urb *urb;
 469         int port_number;
 470         int status;
 471         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 472                              TI_PIPE_TIMEOUT_ENABLE |
 473                              (TI_TRANSFER_TIMEOUT << 2));
 474
 475         if (tport == NULL)
 476                 return -ENODEV;
 477
 478         dev = port->serial->dev;
 479         tdev = tport->tp_tdev;
 480
 481         /* only one open on any port on a device at a time */
 482         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 483                 return -ERESTARTSYS;
 484
 485         port_number = port->number - port->serial->minor;
 486
 487         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 488
 489         tport->tp_msr = 0;
 490         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 491
 492         /* start interrupt urb the first time a port is opened on this device */
 493         if (tdev->td_open_port_count == 0) {
 494                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
 495                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 496                 if (!urb) {
 497                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
 498                         status = -EINVAL;
 499                         goto release_lock;
 500                 }
 501                 urb->context = tdev;
 502                 status = usb_submit_urb(urb, GFP_KERNEL);
 503                 if (status) {
 504                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
 505                         goto release_lock;
 506                 }
 507         }
 508
 509         if (tty)
 510                 ti_set_termios(tty, port, &tty->termios);
 511
 512         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
 513         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 514                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 515         if (status) {
 516                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 517                         __func__, status);
 518                 goto unlink_int_urb;
 519         }
 520
 521         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
 522         status = ti_command_out_sync(tdev, TI_START_PORT,
 523                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 524         if (status) {
 525                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 526                                                         __func__, status);
 527                 goto unlink_int_urb;
 528         }
 529
 530         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
 531         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 532                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 533         if (status) {
 534                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 535                                                         __func__, status);
 536                 goto unlink_int_urb;
 537         }
 538         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 539                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 540         if (status) {
 541                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 542                                                         __func__, status);
 543                 goto unlink_int_urb;
 544         }
 545
 546         /* reset the data toggle on the bulk endpoints to work around bug in
 547          * host controllers where things get out of sync some times */
 548         usb_clear_halt(dev, port->write_urb->pipe);
 549         usb_clear_halt(dev, port->read_urb->pipe);
 550
 551         if (tty)
 552                 ti_set_termios(tty, port, &tty->termios);
 553
 554         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
 555         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 556                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 557         if (status) {
 558                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 559                                                         __func__, status);
 560                 goto unlink_int_urb;
 561         }
 562
 563         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
 564         status = ti_command_out_sync(tdev, TI_START_PORT,
 565                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 566         if (status) {
 567                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 568                                                         __func__, status);
 569                 goto unlink_int_urb;
 570         }
 571
 572         /* start read urb */
 573         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
 574         urb = port->read_urb;
 575         if (!urb) {
 576                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 577                 status = -EINVAL;
 578                 goto unlink_int_urb;
 579         }
 580         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 581         urb->context = tport;
 582         status = usb_submit_urb(urb, GFP_KERNEL);
 583         if (status) {
 584                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 585                                                         __func__, status);
 586                 goto unlink_int_urb;
 587         }
 588
 589         tport->tp_is_open = 1;
 590         ++tdev->td_open_port_count;
 591
 592         goto release_lock;
 593
 594 unlink_int_urb:
 595         if (tdev->td_open_port_count == 0)
 596                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 597 release_lock:
 598         mutex_unlock(&tdev->td_open_close_lock);
 599         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
 600         return status;
 601 }
 602
 603
 604 static void ti_close(struct usb_serial_port *port)
 605 {
 606         struct ti_device *tdev;
 607         struct ti_port *tport;
 608         int port_number;
 609         int status;
 610         int do_unlock;
 611
 612         tdev = usb_get_serial_data(port->serial);
 613         tport = usb_get_serial_port_data(port);
 614         if (tdev == NULL || tport == NULL)
 615                 return;
 616
 617         tport->tp_is_open = 0;
 618
 619         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 620
 621         usb_kill_urb(port->read_urb);
 622         usb_kill_urb(port->write_urb);
 623         tport->tp_write_urb_in_use = 0;
 624
 625         port_number = port->number - port->serial->minor;
 626
 627         dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
 628         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 629                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 630         if (status)
 631                 dev_err(&port->dev,
 632                         "%s - cannot send close port command, %d\n"
 633                                                         , __func__, status);
 634
 635         /* if mutex_lock is interrupted, continue anyway */
 636         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 637         --tport->tp_tdev->td_open_port_count;
 638         if (tport->tp_tdev->td_open_port_count <= 0) {
 639                 /* last port is closed, shut down interrupt urb */
 640                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 641                 tport->tp_tdev->td_open_port_count = 0;
 642         }
 643         if (do_unlock)
 644                 mutex_unlock(&tdev->td_open_close_lock);
 645 }
 646
 647
 648 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 649                         const unsigned char *data, int count)
 650 {
 651         struct ti_port *tport = usb_get_serial_port_data(port);
 652
 653         if (count == 0) {
 654                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
 655                 return 0;
 656         }
 657
 658         if (tport == NULL || !tport->tp_is_open)
 659                 return -ENODEV;
 660
 661         count = kfifo_in_locked(&tport->write_fifo, data, count,
 662                                                         &tport->tp_lock);
 663         ti_send(tport);
 664
 665         return count;
 666 }
 667
 668
 669 static int ti_write_room(struct tty_struct *tty)
 670 {
 671         struct usb_serial_port *port = tty->driver_data;
 672         struct ti_port *tport = usb_get_serial_port_data(port);
 673         int room = 0;
 674         unsigned long flags;
 675
 676         if (tport == NULL)
 677                 return 0;
 678
 679         spin_lock_irqsave(&tport->tp_lock, flags);
 680         room = kfifo_avail(&tport->write_fifo);
 681         spin_unlock_irqrestore(&tport->tp_lock, flags);
 682
 683         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
 684         return room;
 685 }
 686
 687
 688 static int ti_chars_in_buffer(struct tty_struct *tty)
 689 {
 690         struct usb_serial_port *port = tty->driver_data;
 691         struct ti_port *tport = usb_get_serial_port_data(port);
 692         int chars = 0;
 693         unsigned long flags;
 694
 695         if (tport == NULL)
 696                 return 0;
 697
 698         spin_lock_irqsave(&tport->tp_lock, flags);
 699         chars = kfifo_len(&tport->write_fifo);
 700         spin_unlock_irqrestore(&tport->tp_lock, flags);
 701
 702         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
 703         return chars;
 704 }
 705
 706
 707 static void ti_throttle(struct tty_struct *tty)
 708 {
 709         struct usb_serial_port *port = tty->driver_data;
 710         struct ti_port *tport = usb_get_serial_port_data(port);
 711
 712         if (tport == NULL)
 713                 return;
 714
 715         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 716                 ti_stop_read(tport, tty);
 717
 718 }
 719
 720
 721 static void ti_unthrottle(struct tty_struct *tty)
 722 {
 723         struct usb_serial_port *port = tty->driver_data;
 724         struct ti_port *tport = usb_get_serial_port_data(port);
 725         int status;
 726
 727         if (tport == NULL)
 728                 return;
 729
 730         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 731                 status = ti_restart_read(tport, tty);
 732                 if (status)
 733                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 734                                                         __func__, status);
 735         }
 736 }
 737
 738 static int ti_get_icount(struct tty_struct *tty,
 739                 struct serial_icounter_struct *icount)
 740 {
 741         struct usb_serial_port *port = tty->driver_data;
 742         struct ti_port *tport = usb_get_serial_port_data(port);
 743         struct async_icount cnow = tport->tp_icount;
 744
 745         dev_dbg(&port->dev, "%s - TIOCGICOUNT RX=%d, TX=%d\n", __func__,
 746                 cnow.rx, cnow.tx);
 747
 748         icount->cts = cnow.cts;
 749         icount->dsr = cnow.dsr;
 750         icount->rng = cnow.rng;
 751         icount->dcd = cnow.dcd;
 752         icount->rx = cnow.rx;
 753         icount->tx = cnow.tx;
 754         icount->frame = cnow.frame;
 755         icount->overrun = cnow.overrun;
 756         icount->parity = cnow.parity;
 757         icount->brk = cnow.brk;
 758         icount->buf_overrun = cnow.buf_overrun;
 759
 760         return 0;
 761 }
 762
 763 static int ti_ioctl(struct tty_struct *tty,
 764         unsigned int cmd, unsigned long arg)
 765 {
 766         struct usb_serial_port *port = tty->driver_data;
 767         struct ti_port *tport = usb_get_serial_port_data(port);
 768         struct async_icount cnow;
 769         struct async_icount cprev;
 770
 771         dev_dbg(&port->dev, "%s - cmd = 0x%04X\n", __func__, cmd);
 772
 773         if (tport == NULL)
 774                 return -ENODEV;
 775
 776         switch (cmd) {
 777         case TIOCGSERIAL:
 778                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
 779                 return ti_get_serial_info(tport,
 780                                 (struct serial_struct __user *)arg);
 781         case TIOCSSERIAL:
 782                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
 783                 return ti_set_serial_info(tty, tport,
 784                                 (struct serial_struct __user *)arg);
 785         case TIOCMIWAIT:
 786                 dev_dbg(&port->dev, "%s - TIOCMIWAIT\n", __func__);
 787                 cprev = tport->tp_icount;
 788                 while (1) {
 789                         interruptible_sleep_on(&tport->tp_msr_wait);
 790                         if (signal_pending(current))
 791                                 return -ERESTARTSYS;
 792                         cnow = tport->tp_icount;
 793                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 794                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 795                                 return -EIO; /* no change => error */
 796                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 797                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 798                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 799                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
 800                                 return 0;
 801                         cprev = cnow;
 802                 }
 803                 break;
 804         }
 805         return -ENOIOCTLCMD;
 806 }
 807
 808
 809 static void ti_set_termios(struct tty_struct *tty,
 810                 struct usb_serial_port *port, struct ktermios *old_termios)
 811 {
 812         struct ti_port *tport = usb_get_serial_port_data(port);
 813         struct ti_uart_config *config;
 814         tcflag_t cflag, iflag;
 815         int baud;
 816         int status;
 817         int port_number = port->number - port->serial->minor;
 818         unsigned int mcr;
 819
 820         cflag = tty->termios.c_cflag;
 821         iflag = tty->termios.c_iflag;
 822
 823         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
 824         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
 825                 old_termios->c_cflag, old_termios->c_iflag);
 826
 827         if (tport == NULL)
 828                 return;
 829
 830         config = kmalloc(sizeof(*config), GFP_KERNEL);
 831         if (!config) {
 832                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 833                 return;
 834         }
 835
 836         config->wFlags = 0;
 837
 838         /* these flags must be set */
 839         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 840         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 841         config->bUartMode = (__u8)(tport->tp_uart_mode);
 842
 843         switch (cflag & CSIZE) {
 844         case CS5:
 845                     config->bDataBits = TI_UART_5_DATA_BITS;
 846                     break;
 847         case CS6:
 848                     config->bDataBits = TI_UART_6_DATA_BITS;
 849                     break;
 850         case CS7:
 851                     config->bDataBits = TI_UART_7_DATA_BITS;
 852                     break;
 853         default:
 854         case CS8:
 855                     config->bDataBits = TI_UART_8_DATA_BITS;
 856                     break;
 857         }
 858
 859         /* CMSPAR isn't supported by this driver */
 860         tty->termios.c_cflag &= ~CMSPAR;
 861
 862         if (cflag & PARENB) {
 863                 if (cflag & PARODD) {
 864                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 865                         config->bParity = TI_UART_ODD_PARITY;
 866                 } else {
 867                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 868                         config->bParity = TI_UART_EVEN_PARITY;
 869                 }
 870         } else {
 871                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 872                 config->bParity = TI_UART_NO_PARITY;
 873         }
 874
 875         if (cflag & CSTOPB)
 876                 config->bStopBits = TI_UART_2_STOP_BITS;
 877         else
 878                 config->bStopBits = TI_UART_1_STOP_BITS;
 879
 880         if (cflag & CRTSCTS) {
 881                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 882                 if ((cflag & CBAUD) != B0)
 883                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 884                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 885         } else {
 886                 tty->hw_stopped = 0;
 887                 ti_restart_read(tport, tty);
 888         }
 889
 890         if (I_IXOFF(tty) || I_IXON(tty)) {
 891                 config->cXon  = START_CHAR(tty);
 892                 config->cXoff = STOP_CHAR(tty);
 893
 894                 if (I_IXOFF(tty))
 895                         config->wFlags |= TI_UART_ENABLE_X_IN;
 896                 else
 897                         ti_restart_read(tport, tty);
 898
 899                 if (I_IXON(tty))
 900                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 901         }
 902
 903         baud = tty_get_baud_rate(tty);
 904         if (!baud)
 905                 baud = 9600;
 906         if (tport->tp_tdev->td_is_3410)
 907                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 908         else
 909                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 910
 911         /* FIXME: Should calculate resulting baud here and report it back */
 912         if ((cflag & CBAUD) != B0)
 913                 tty_encode_baud_rate(tty, baud, baud);
 914
 915         dev_dbg(&port->dev,
 916                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 917                 __func__, baud, config->wBaudRate, config->wFlags,
 918                 config->bDataBits, config->bParity, config->bStopBits,
 919                 config->cXon, config->cXoff, config->bUartMode);
 920
 921         cpu_to_be16s(&config->wBaudRate);
 922         cpu_to_be16s(&config->wFlags);
 923
 924         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 925                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 926                 sizeof(*config));
 927         if (status)
 928                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 929                                         __func__, port_number, status);
 930
 931         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 932         mcr = tport->tp_shadow_mcr;
 933         /* if baud rate is B0, clear RTS and DTR */
 934         if ((cflag & CBAUD) == B0)
 935                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 936         status = ti_set_mcr(tport, mcr);
 937         if (status)
 938                 dev_err(&port->dev,
 939                         "%s - cannot set modem control on port %d, %d\n",
 940                                                 __func__, port_number, status);
 941
 942         kfree(config);
 943 }
 944
 945
 946 static int ti_tiocmget(struct tty_struct *tty)
 947 {
 948         struct usb_serial_port *port = tty->driver_data;
 949         struct ti_port *tport = usb_get_serial_port_data(port);
 950         unsigned int result;
 951         unsigned int msr;
 952         unsigned int mcr;
 953         unsigned long flags;
 954
 955         if (tport == NULL)
 956                 return -ENODEV;
 957
 958         spin_lock_irqsave(&tport->tp_lock, flags);
 959         msr = tport->tp_msr;
 960         mcr = tport->tp_shadow_mcr;
 961         spin_unlock_irqrestore(&tport->tp_lock, flags);
 962
 963         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
 964                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
 965                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
 966                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
 967                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
 968                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
 969                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
 970
 971         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
 972
 973         return result;
 974 }
 975
 976
 977 static int ti_tiocmset(struct tty_struct *tty,
 978                                 unsigned int set, unsigned int clear)
 979 {
 980         struct usb_serial_port *port = tty->driver_data;
 981         struct ti_port *tport = usb_get_serial_port_data(port);
 982         unsigned int mcr;
 983         unsigned long flags;
 984
 985         if (tport == NULL)
 986                 return -ENODEV;
 987
 988         spin_lock_irqsave(&tport->tp_lock, flags);
 989         mcr = tport->tp_shadow_mcr;
 990
 991         if (set & TIOCM_RTS)
 992                 mcr |= TI_MCR_RTS;
 993         if (set & TIOCM_DTR)
 994                 mcr |= TI_MCR_DTR;
 995         if (set & TIOCM_LOOP)
 996                 mcr |= TI_MCR_LOOP;
 997
 998         if (clear & TIOCM_RTS)
 999                 mcr &= ~TI_MCR_RTS;
1000         if (clear & TIOCM_DTR)
1001                 mcr &= ~TI_MCR_DTR;
1002         if (clear & TIOCM_LOOP)
1003                 mcr &= ~TI_MCR_LOOP;
1004         spin_unlock_irqrestore(&tport->tp_lock, flags);
1005
1006         return ti_set_mcr(tport, mcr);
1007 }
1008
1009
1010 static void ti_break(struct tty_struct *tty, int break_state)
1011 {
1012         struct usb_serial_port *port = tty->driver_data;
1013         struct ti_port *tport = usb_get_serial_port_data(port);
1014         int status;
1015
1016         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
1017
1018         if (tport == NULL)
1019                 return;
1020
1021         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1022
1023         status = ti_write_byte(port, tport->tp_tdev,
1024                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1025                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1026
1027         if (status)
1028                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
1029 }
1030
1031
1032 static void ti_interrupt_callback(struct urb *urb)
1033 {
1034         struct ti_device *tdev = urb->context;
1035         struct usb_serial_port *port;
1036         struct usb_serial *serial = tdev->td_serial;
1037         struct ti_port *tport;
1038         struct device *dev = &urb->dev->dev;
1039         unsigned char *data = urb->transfer_buffer;
1040         int length = urb->actual_length;
1041         int port_number;
1042         int function;
1043         int status = urb->status;
1044         int retval;
1045         __u8 msr;
1046
1047         switch (status) {
1048         case 0:
1049                 break;
1050         case -ECONNRESET:
1051         case -ENOENT:
1052         case -ESHUTDOWN:
1053                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1054                 tdev->td_urb_error = 1;
1055                 return;
1056         default:
1057                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
1058                 tdev->td_urb_error = 1;
1059                 goto exit;
1060         }
1061
1062         if (length != 2) {
1063                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
1064                 goto exit;
1065         }
1066
1067         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1068                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1069                 goto exit;
1070         }
1071
1072         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1073         function = TI_GET_FUNC_FROM_CODE(data[0]);
1074
1075         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
1076                 __func__, port_number, function, data[1]);
1077
1078         if (port_number >= serial->num_ports) {
1079                 dev_err(dev, "%s - bad port number, %d\n",
1080                                                 __func__, port_number);
1081                 goto exit;
1082         }
1083
1084         port = serial->port[port_number];
1085
1086         tport = usb_get_serial_port_data(port);
1087         if (!tport)
1088                 goto exit;
1089
1090         switch (function) {
1091         case TI_CODE_DATA_ERROR:
1092                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1093                         __func__, port_number, data[1]);
1094                 break;
1095
1096         case TI_CODE_MODEM_STATUS:
1097                 msr = data[1];
1098                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
1099                 ti_handle_new_msr(tport, msr);
1100                 break;
1101
1102         default:
1103                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1104                                                         __func__, data[1]);
1105                 break;
1106         }
1107
1108 exit:
1109         retval = usb_submit_urb(urb, GFP_ATOMIC);
1110         if (retval)
1111                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1112                         __func__, retval);
1113 }
1114
1115
1116 static void ti_bulk_in_callback(struct urb *urb)
1117 {
1118         struct ti_port *tport = urb->context;
1119         struct usb_serial_port *port = tport->tp_port;
1120         struct device *dev = &urb->dev->dev;
1121         int status = urb->status;
1122         int retval = 0;
1123         struct tty_struct *tty;
1124
1125         switch (status) {
1126         case 0:
1127                 break;
1128         case -ECONNRESET:
1129         case -ENOENT:
1130         case -ESHUTDOWN:
1131                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1132                 tport->tp_tdev->td_urb_error = 1;
1133                 wake_up_interruptible(&tport->tp_write_wait);
1134                 return;
1135         default:
1136                 dev_err(dev, "%s - nonzero urb status, %d\n",
1137                         __func__, status);
1138                 tport->tp_tdev->td_urb_error = 1;
1139                 wake_up_interruptible(&tport->tp_write_wait);
1140         }
1141
1142         if (status == -EPIPE)
1143                 goto exit;
1144
1145         if (status) {
1146                 dev_err(dev, "%s - stopping read!\n", __func__);
1147                 return;
1148         }
1149
1150         tty = tty_port_tty_get(&port->port);
1151         if (tty) {
1152                 if (urb->actual_length) {
1153                         usb_serial_debug_data(dev, __func__, urb->actual_length,
1154                                               urb->transfer_buffer);
1155
1156                         if (!tport->tp_is_open)
1157                                 dev_dbg(dev, "%s - port closed, dropping data\n",
1158                                         __func__);
1159                         else
1160                                 ti_recv(&urb->dev->dev, tty,
1161                                                 urb->transfer_buffer,
1162                                                 urb->actual_length);
1163                         spin_lock(&tport->tp_lock);
1164                         tport->tp_icount.rx += urb->actual_length;
1165                         spin_unlock(&tport->tp_lock);
1166                 }
1167                 tty_kref_put(tty);
1168         }
1169
1170 exit:
1171         /* continue to read unless stopping */
1172         spin_lock(&tport->tp_lock);
1173         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1174                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1175         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1176                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1177
1178         spin_unlock(&tport->tp_lock);
1179         if (retval)
1180                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1181                         __func__, retval);
1182 }
1183
1184
1185 static void ti_bulk_out_callback(struct urb *urb)
1186 {
1187         struct ti_port *tport = urb->context;
1188         struct usb_serial_port *port = tport->tp_port;
1189         int status = urb->status;
1190
1191         tport->tp_write_urb_in_use = 0;
1192
1193         switch (status) {
1194         case 0:
1195                 break;
1196         case -ECONNRESET:
1197         case -ENOENT:
1198         case -ESHUTDOWN:
1199                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1200                 tport->tp_tdev->td_urb_error = 1;
1201                 wake_up_interruptible(&tport->tp_write_wait);
1202                 return;
1203         default:
1204                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1205                         __func__, status);
1206                 tport->tp_tdev->td_urb_error = 1;
1207                 wake_up_interruptible(&tport->tp_write_wait);
1208         }
1209
1210         /* send any buffered data */
1211         ti_send(tport);
1212 }
1213
1214
1215 static void ti_recv(struct device *dev, struct tty_struct *tty,
1216         unsigned char *data, int length)
1217 {
1218         int cnt;
1219
1220         do {
1221                 cnt = tty_insert_flip_string(tty, data, length);
1222                 if (cnt < length) {
1223                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1224                                                 __func__, length - cnt);
1225                         if (cnt == 0)
1226                                 break;
1227                 }
1228                 tty_flip_buffer_push(tty);
1229                 data += cnt;
1230                 length -= cnt;
1231         } while (length > 0);
1232
1233 }
1234
1235
1236 static void ti_send(struct ti_port *tport)
1237 {
1238         int count, result;
1239         struct usb_serial_port *port = tport->tp_port;
1240         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1241         unsigned long flags;
1242
1243         spin_lock_irqsave(&tport->tp_lock, flags);
1244
1245         if (tport->tp_write_urb_in_use)
1246                 goto unlock;
1247
1248         count = kfifo_out(&tport->write_fifo,
1249                                 port->write_urb->transfer_buffer,
1250                                 port->bulk_out_size);
1251
1252         if (count == 0)
1253                 goto unlock;
1254
1255         tport->tp_write_urb_in_use = 1;
1256
1257         spin_unlock_irqrestore(&tport->tp_lock, flags);
1258
1259         usb_serial_debug_data(&port->dev, __func__, count,
1260                               port->write_urb->transfer_buffer);
1261
1262         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1263                            usb_sndbulkpipe(port->serial->dev,
1264                                             port->bulk_out_endpointAddress),
1265                            port->write_urb->transfer_buffer, count,
1266                            ti_bulk_out_callback, tport);
1267
1268         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1269         if (result) {
1270                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1271                                                         __func__, result);
1272                 tport->tp_write_urb_in_use = 0;
1273                 /* TODO: reschedule ti_send */
1274         } else {
1275                 spin_lock_irqsave(&tport->tp_lock, flags);
1276                 tport->tp_icount.tx += count;
1277                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1278         }
1279
1280         /* more room in the buffer for new writes, wakeup */
1281         if (tty)
1282                 tty_wakeup(tty);
1283         tty_kref_put(tty);
1284         wake_up_interruptible(&tport->tp_write_wait);
1285         return;
1286 unlock:
1287         spin_unlock_irqrestore(&tport->tp_lock, flags);
1288         tty_kref_put(tty);
1289         return;
1290 }
1291
1292
1293 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1294 {
1295         unsigned long flags;
1296         int status;
1297
1298         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1299                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1300                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1301
1302         spin_lock_irqsave(&tport->tp_lock, flags);
1303         if (!status)
1304                 tport->tp_shadow_mcr = mcr;
1305         spin_unlock_irqrestore(&tport->tp_lock, flags);
1306
1307         return status;
1308 }
1309
1310
1311 static int ti_get_lsr(struct ti_port *tport)
1312 {
1313         int size, status;
1314         struct ti_device *tdev = tport->tp_tdev;
1315         struct usb_serial_port *port = tport->tp_port;
1316         int port_number = port->number - port->serial->minor;
1317         struct ti_port_status *data;
1318
1319         size = sizeof(struct ti_port_status);
1320         data = kmalloc(size, GFP_KERNEL);
1321         if (!data) {
1322                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1323                 return -ENOMEM;
1324         }
1325
1326         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1327                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1328         if (status) {
1329                 dev_err(&port->dev,
1330                         "%s - get port status command failed, %d\n",
1331                                                         __func__, status);
1332                 goto free_data;
1333         }
1334
1335         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1336
1337         tport->tp_lsr = data->bLSR;
1338
1339 free_data:
1340         kfree(data);
1341         return status;
1342 }
1343
1344
1345 static int ti_get_serial_info(struct ti_port *tport,
1346         struct serial_struct __user *ret_arg)
1347 {
1348         struct usb_serial_port *port = tport->tp_port;
1349         struct serial_struct ret_serial;
1350
1351         if (!ret_arg)
1352                 return -EFAULT;
1353
1354         memset(&ret_serial, 0, sizeof(ret_serial));
1355
1356         ret_serial.type = PORT_16550A;
1357         ret_serial.line = port->serial->minor;
1358         ret_serial.port = port->number - port->serial->minor;
1359         ret_serial.flags = tport->tp_flags;
1360         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1361         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1362         ret_serial.closing_wait = tport->tp_closing_wait;
1363
1364         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1365                 return -EFAULT;
1366
1367         return 0;
1368 }
1369
1370
1371 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1372         struct serial_struct __user *new_arg)
1373 {
1374         struct serial_struct new_serial;
1375
1376         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1377                 return -EFAULT;
1378
1379         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1380         tport->tp_closing_wait = new_serial.closing_wait;
1381
1382         return 0;
1383 }
1384
1385
1386 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1387 {
1388         struct async_icount *icount;
1389         struct tty_struct *tty;
1390         unsigned long flags;
1391
1392         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1393
1394         if (msr & TI_MSR_DELTA_MASK) {
1395                 spin_lock_irqsave(&tport->tp_lock, flags);
1396                 icount = &tport->tp_icount;
1397                 if (msr & TI_MSR_DELTA_CTS)
1398                         icount->cts++;
1399                 if (msr & TI_MSR_DELTA_DSR)
1400                         icount->dsr++;
1401                 if (msr & TI_MSR_DELTA_CD)
1402                         icount->dcd++;
1403                 if (msr & TI_MSR_DELTA_RI)
1404                         icount->rng++;
1405                 wake_up_interruptible(&tport->tp_msr_wait);
1406                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1407         }
1408
1409         tport->tp_msr = msr & TI_MSR_MASK;
1410
1411         /* handle CTS flow control */
1412         tty = tty_port_tty_get(&tport->tp_port->port);
1413         if (tty && C_CRTSCTS(tty)) {
1414                 if (msr & TI_MSR_CTS) {
1415                         tty->hw_stopped = 0;
1416                         tty_wakeup(tty);
1417                 } else {
1418                         tty->hw_stopped = 1;
1419                 }
1420         }
1421         tty_kref_put(tty);
1422 }
1423
1424
1425 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1426 {
1427         struct ti_device *tdev = tport->tp_tdev;
1428         struct usb_serial_port *port = tport->tp_port;
1429         wait_queue_t wait;
1430
1431         spin_lock_irq(&tport->tp_lock);
1432
1433         /* wait for data to drain from the buffer */
1434         tdev->td_urb_error = 0;
1435         init_waitqueue_entry(&wait, current);
1436         add_wait_queue(&tport->tp_write_wait, &wait);
1437         for (;;) {
1438                 set_current_state(TASK_INTERRUPTIBLE);
1439                 if (kfifo_len(&tport->write_fifo) == 0
1440                 || timeout == 0 || signal_pending(current)
1441                 || tdev->td_urb_error
1442                 || port->serial->disconnected)  /* disconnect */
1443                         break;
1444                 spin_unlock_irq(&tport->tp_lock);
1445                 timeout = schedule_timeout(timeout);
1446                 spin_lock_irq(&tport->tp_lock);
1447         }
1448         set_current_state(TASK_RUNNING);
1449         remove_wait_queue(&tport->tp_write_wait, &wait);
1450
1451         /* flush any remaining data in the buffer */
1452         if (flush)
1453                 kfifo_reset_out(&tport->write_fifo);
1454
1455         spin_unlock_irq(&tport->tp_lock);
1456
1457         mutex_lock(&port->serial->disc_mutex);
1458         /* wait for data to drain from the device */
1459         /* wait for empty tx register, plus 20 ms */
1460         timeout += jiffies;
1461         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1462         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1463         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1464         && !port->serial->disconnected) {
1465                 if (ti_get_lsr(tport))
1466                         break;
1467                 mutex_unlock(&port->serial->disc_mutex);
1468                 msleep_interruptible(20);
1469                 mutex_lock(&port->serial->disc_mutex);
1470         }
1471         mutex_unlock(&port->serial->disc_mutex);
1472 }
1473
1474
1475 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1476 {
1477         unsigned long flags;
1478
1479         spin_lock_irqsave(&tport->tp_lock, flags);
1480
1481         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1482                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1483
1484         spin_unlock_irqrestore(&tport->tp_lock, flags);
1485 }
1486
1487
1488 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1489 {
1490         struct urb *urb;
1491         int status = 0;
1492         unsigned long flags;
1493
1494         spin_lock_irqsave(&tport->tp_lock, flags);
1495
1496         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1497                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1498                 urb = tport->tp_port->read_urb;
1499                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1500                 urb->context = tport;
1501                 status = usb_submit_urb(urb, GFP_KERNEL);
1502         } else  {
1503                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1504                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1505         }
1506
1507         return status;
1508 }
1509
1510
1511 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1512         __u16 moduleid, __u16 value, __u8 *data, int size)
1513 {
1514         int status;
1515
1516         status = usb_control_msg(tdev->td_serial->dev,
1517                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1518                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1519                 value, moduleid, data, size, 1000);
1520
1521         if (status == size)
1522                 status = 0;
1523
1524         if (status > 0)
1525                 status = -ECOMM;
1526
1527         return status;
1528 }
1529
1530
1531 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1532         __u16 moduleid, __u16 value, __u8 *data, int size)
1533 {
1534         int status;
1535
1536         status = usb_control_msg(tdev->td_serial->dev,
1537                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1538                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1539                 value, moduleid, data, size, 1000);
1540
1541         if (status == size)
1542                 status = 0;
1543
1544         if (status > 0)
1545                 status = -ECOMM;
1546
1547         return status;
1548 }
1549
1550
1551 static int ti_write_byte(struct usb_serial_port *port,
1552                         struct ti_device *tdev, unsigned long addr,
1553                         __u8 mask, __u8 byte)
1554 {
1555         int status;
1556         unsigned int size;
1557         struct ti_write_data_bytes *data;
1558
1559         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1560                 addr, mask, byte);
1561
1562         size = sizeof(struct ti_write_data_bytes) + 2;
1563         data = kmalloc(size, GFP_KERNEL);
1564         if (!data) {
1565                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1566                 return -ENOMEM;
1567         }
1568
1569         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1570         data->bDataType = TI_RW_DATA_BYTE;
1571         data->bDataCounter = 1;
1572         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1573         data->wBaseAddrLo = cpu_to_be16(addr);
1574         data->bData[0] = mask;
1575         data->bData[1] = byte;
1576
1577         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1578                 (__u8 *)data, size);
1579
1580         if (status < 0)
1581                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1582
1583         kfree(data);
1584
1585         return status;
1586 }
1587
1588 static int ti_do_download(struct usb_device *dev, int pipe,
1589                                                 u8 *buffer, int size)
1590 {
1591         int pos;
1592         u8 cs = 0;
1593         int done;
1594         struct ti_firmware_header *header;
1595         int status = 0;
1596         int len;
1597
1598         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1599                 cs = (__u8)(cs + buffer[pos]);
1600
1601         header = (struct ti_firmware_header *)buffer;
1602         header->wLength = cpu_to_le16((__u16)(size
1603                                         - sizeof(struct ti_firmware_header)));
1604         header->bCheckSum = cs;
1605
1606         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1607         for (pos = 0; pos < size; pos += done) {
1608                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1609                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1610                                                                 &done, 1000);
1611                 if (status)
1612                         break;
1613         }
1614         return status;
1615 }
1616
1617 static int ti_download_firmware(struct ti_device *tdev)
1618 {
1619         int status;
1620         int buffer_size;
1621         __u8 *buffer;
1622         struct usb_device *dev = tdev->td_serial->dev;
1623         unsigned int pipe = usb_sndbulkpipe(dev,
1624                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1625         const struct firmware *fw_p;
1626         char buf[32];
1627
1628         /* try ID specific firmware first, then try generic firmware */
1629         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1630             dev->descriptor.idProduct);
1631         status = request_firmware(&fw_p, buf, &dev->dev);
1632
1633         if (status != 0) {
1634                 buf[0] = '\0';
1635                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1636                         switch (dev->descriptor.idProduct) {
1637                         case MTS_CDMA_PRODUCT_ID:
1638                                 strcpy(buf, "mts_cdma.fw");
1639                                 break;
1640                         case MTS_GSM_PRODUCT_ID:
1641                                 strcpy(buf, "mts_gsm.fw");
1642                                 break;
1643                         case MTS_EDGE_PRODUCT_ID:
1644                                 strcpy(buf, "mts_edge.fw");
1645                                 break;
1646                         case MTS_MT9234MU_PRODUCT_ID:
1647                                 strcpy(buf, "mts_mt9234mu.fw");
1648                                 break;
1649                         case MTS_MT9234ZBA_PRODUCT_ID:
1650                                 strcpy(buf, "mts_mt9234zba.fw");
1651                                 break;
1652                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1653                                 strcpy(buf, "mts_mt9234zba.fw");
1654                                 break;                  }
1655                 }
1656                 if (buf[0] == '\0') {
1657                         if (tdev->td_is_3410)
1658                                 strcpy(buf, "ti_3410.fw");
1659                         else
1660                                 strcpy(buf, "ti_5052.fw");
1661                 }
1662                 status = request_firmware(&fw_p, buf, &dev->dev);
1663         }
1664         if (status) {
1665                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1666                 return -ENOENT;
1667         }
1668         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1669                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1670                 release_firmware(fw_p);
1671                 return -ENOENT;
1672         }
1673
1674         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1675         buffer = kmalloc(buffer_size, GFP_KERNEL);
1676         if (buffer) {
1677                 memcpy(buffer, fw_p->data, fw_p->size);
1678                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1679                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1680                 kfree(buffer);
1681         } else {
1682                 dev_dbg(&dev->dev, "%s ENOMEM\n", __func__);
1683                 status = -ENOMEM;
1684         }
1685         release_firmware(fw_p);
1686         if (status) {
1687                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1688                                                         __func__, status);
1689                 return status;
1690         }
1691
1692         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1693
1694         return 0;
1695 }