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_VERSION       "v0.10"
  44 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
  45 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
  46
  47 #define TI_FIRMWARE_BUF_SIZE    16284
  48
  49 #define TI_WRITE_BUF_SIZE       1024
  50
  51 #define TI_TRANSFER_TIMEOUT     2
  52
  53 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
  54
  55 /* supported setserial flags */
  56 #define TI_SET_SERIAL_FLAGS     0
  57
  58 /* read urb states */
  59 #define TI_READ_URB_RUNNING     0
  60 #define TI_READ_URB_STOPPING    1
  61 #define TI_READ_URB_STOPPED     2
  62
  63 #define TI_EXTRA_VID_PID_COUNT  5
  64
  65
  66 /* Structures */
  67
  68 struct ti_port {
  69         int                     tp_is_open;
  70         __u8                    tp_msr;
  71         __u8                    tp_lsr;
  72         __u8                    tp_shadow_mcr;
  73         __u8                    tp_uart_mode;   /* 232 or 485 modes */
  74         unsigned int            tp_uart_base_addr;
  75         int                     tp_flags;
  76         int                     tp_closing_wait;/* in .01 secs */
  77         struct async_icount     tp_icount;
  78         wait_queue_head_t       tp_msr_wait;    /* wait for msr change */
  79         wait_queue_head_t       tp_write_wait;
  80         struct ti_device        *tp_tdev;
  81         struct usb_serial_port  *tp_port;
  82         spinlock_t              tp_lock;
  83         int                     tp_read_urb_state;
  84         int                     tp_write_urb_in_use;
  85         struct kfifo            write_fifo;
  86 };
  87
  88 struct ti_device {
  89         struct mutex            td_open_close_lock;
  90         int                     td_open_port_count;
  91         struct usb_serial       *td_serial;
  92         int                     td_is_3410;
  93         int                     td_urb_error;
  94 };
  95
  96
  97 /* Function Declarations */
  98
  99 static int ti_startup(struct usb_serial *serial);
 100 static void ti_release(struct usb_serial *serial);
 101 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
 102 static void ti_close(struct usb_serial_port *port);
 103 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 104                 const unsigned char *data, int count);
 105 static int ti_write_room(struct tty_struct *tty);
 106 static int ti_chars_in_buffer(struct tty_struct *tty);
 107 static void ti_throttle(struct tty_struct *tty);
 108 static void ti_unthrottle(struct tty_struct *tty);
 109 static int ti_ioctl(struct tty_struct *tty,
 110                 unsigned int cmd, unsigned long arg);
 111 static int ti_get_icount(struct tty_struct *tty,
 112                 struct serial_icounter_struct *icount);
 113 static void ti_set_termios(struct tty_struct *tty,
 114                 struct usb_serial_port *port, struct ktermios *old_termios);
 115 static int ti_tiocmget(struct tty_struct *tty);
 116 static int ti_tiocmset(struct tty_struct *tty,
 117                 unsigned int set, unsigned int clear);
 118 static void ti_break(struct tty_struct *tty, int break_state);
 119 static void ti_interrupt_callback(struct urb *urb);
 120 static void ti_bulk_in_callback(struct urb *urb);
 121 static void ti_bulk_out_callback(struct urb *urb);
 122
 123 static void ti_recv(struct device *dev, struct tty_struct *tty,
 124         unsigned char *data, int length);
 125 static void ti_send(struct ti_port *tport);
 126 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 127 static int ti_get_lsr(struct ti_port *tport);
 128 static int ti_get_serial_info(struct ti_port *tport,
 129         struct serial_struct __user *ret_arg);
 130 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 131         struct serial_struct __user *new_arg);
 132 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 133
 134 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
 135
 136 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 137 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 138
 139 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 140         __u16 moduleid, __u16 value, __u8 *data, int size);
 141 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 142         __u16 moduleid, __u16 value, __u8 *data, int size);
 143
 144 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
 145         __u8 mask, __u8 byte);
 146
 147 static int ti_download_firmware(struct ti_device *tdev);
 148
 149
 150 /* Data */
 151
 152 /* module parameters */
 153 static bool debug;
 154 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 155 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
 156 static unsigned int vendor_3410_count;
 157 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
 158 static unsigned int product_3410_count;
 159 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
 160 static unsigned int vendor_5052_count;
 161 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
 162 static unsigned int product_5052_count;
 163
 164 /* supported devices */
 165 /* the array dimension is the number of default entries plus */
 166 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
 167 /* null entry */
 168 static struct usb_device_id ti_id_table_3410[14+TI_EXTRA_VID_PID_COUNT+1] = {
 169         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 170         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 171         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 172         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 173         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 174         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 175         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 176         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 177         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 178         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 179         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 180         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 181         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 182         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 183 };
 184
 185 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
 186         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 187         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 188         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 189         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 190 };
 191
 192 static struct usb_device_id ti_id_table_combined[18+2*TI_EXTRA_VID_PID_COUNT+1] = {
 193         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 194         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 195         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 196         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 197         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 198         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 199         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 200         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 201         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 202         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 203         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 204         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 205         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 206         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 207         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 208         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 209         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 210         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_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_VERSION(TI_DRIVER_VERSION);
 279 MODULE_LICENSE("GPL");
 280
 281 MODULE_FIRMWARE("ti_3410.fw");
 282 MODULE_FIRMWARE("ti_5052.fw");
 283 MODULE_FIRMWARE("mts_cdma.fw");
 284 MODULE_FIRMWARE("mts_gsm.fw");
 285 MODULE_FIRMWARE("mts_edge.fw");
 286 MODULE_FIRMWARE("mts_mt9234mu.fw");
 287 MODULE_FIRMWARE("mts_mt9234zba.fw");
 288
 289 module_param(debug, bool, S_IRUGO | S_IWUSR);
 290 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
 291
 292 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 293 MODULE_PARM_DESC(closing_wait,
 294     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 295
 296 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 297 MODULE_PARM_DESC(vendor_3410,
 298                 "Vendor ids for 3410 based devices, 1-5 short integers");
 299 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 300 MODULE_PARM_DESC(product_3410,
 301                 "Product ids for 3410 based devices, 1-5 short integers");
 302 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 303 MODULE_PARM_DESC(vendor_5052,
 304                 "Vendor ids for 5052 based devices, 1-5 short integers");
 305 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 306 MODULE_PARM_DESC(product_5052,
 307                 "Product ids for 5052 based devices, 1-5 short integers");
 308
 309 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 310
 311
 312 /* Functions */
 313
 314 static int __init ti_init(void)
 315 {
 316         int i, j, c;
 317         int ret;
 318
 319         /* insert extra vendor and product ids */
 320         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 321         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 322         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 323                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 324                 ti_id_table_3410[j].idProduct = product_3410[i];
 325                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 326                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 327                 ti_id_table_combined[c].idProduct = product_3410[i];
 328                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 329         }
 330         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 331         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 332                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 333                 ti_id_table_5052[j].idProduct = product_5052[i];
 334                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 335                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 336                 ti_id_table_combined[c].idProduct = product_5052[i];
 337                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 338         }
 339
 340         ret = usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, ti_id_table_combined);
 341         if (ret == 0)
 342                 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
 343                                TI_DRIVER_DESC "\n");
 344         return ret;
 345 }
 346
 347 static void __exit ti_exit(void)
 348 {
 349         usb_serial_deregister_drivers(serial_drivers);
 350 }
 351
 352 module_init(ti_init);
 353 module_exit(ti_exit);
 354
 355
 356 static int ti_startup(struct usb_serial *serial)
 357 {
 358         struct ti_device *tdev;
 359         struct ti_port *tport;
 360         struct usb_device *dev = serial->dev;
 361         int status;
 362         int i;
 363
 364
 365         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
 366             __func__, le16_to_cpu(dev->descriptor.idProduct),
 367             dev->descriptor.bNumConfigurations,
 368             dev->actconfig->desc.bConfigurationValue);
 369
 370         /* create device structure */
 371         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 372         if (tdev == NULL) {
 373                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 374                 return -ENOMEM;
 375         }
 376         mutex_init(&tdev->td_open_close_lock);
 377         tdev->td_serial = serial;
 378         usb_set_serial_data(serial, tdev);
 379
 380         /* determine device type */
 381         if (usb_match_id(serial->interface, ti_id_table_3410))
 382                 tdev->td_is_3410 = 1;
 383         dbg("%s - device type is %s", __func__,
 384                                 tdev->td_is_3410 ? "3410" : "5052");
 385
 386         /* if we have only 1 configuration, download firmware */
 387         if (dev->descriptor.bNumConfigurations == 1) {
 388                 status = ti_download_firmware(tdev);
 389
 390                 if (status != 0)
 391                         goto free_tdev;
 392
 393                 /* 3410 must be reset, 5052 resets itself */
 394                 if (tdev->td_is_3410) {
 395                         msleep_interruptible(100);
 396                         usb_reset_device(dev);
 397                 }
 398
 399                 status = -ENODEV;
 400                 goto free_tdev;
 401         }
 402
 403         /* the second configuration must be set */
 404         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 405                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 406                 status = status ? status : -ENODEV;
 407                 goto free_tdev;
 408         }
 409
 410         /* set up port structures */
 411         for (i = 0; i < serial->num_ports; ++i) {
 412                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
 413                 if (tport == NULL) {
 414                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 415                         status = -ENOMEM;
 416                         goto free_tports;
 417                 }
 418                 spin_lock_init(&tport->tp_lock);
 419                 tport->tp_uart_base_addr = (i == 0 ?
 420                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
 421                 tport->tp_closing_wait = closing_wait;
 422                 init_waitqueue_head(&tport->tp_msr_wait);
 423                 init_waitqueue_head(&tport->tp_write_wait);
 424                 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
 425                                                                 GFP_KERNEL)) {
 426                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 427                         kfree(tport);
 428                         status = -ENOMEM;
 429                         goto free_tports;
 430                 }
 431                 tport->tp_port = serial->port[i];
 432                 tport->tp_tdev = tdev;
 433                 usb_set_serial_port_data(serial->port[i], tport);
 434                 tport->tp_uart_mode = 0;        /* default is RS232 */
 435         }
 436
 437         return 0;
 438
 439 free_tports:
 440         for (--i; i >= 0; --i) {
 441                 tport = usb_get_serial_port_data(serial->port[i]);
 442                 kfifo_free(&tport->write_fifo);
 443                 kfree(tport);
 444                 usb_set_serial_port_data(serial->port[i], NULL);
 445         }
 446 free_tdev:
 447         kfree(tdev);
 448         usb_set_serial_data(serial, NULL);
 449         return status;
 450 }
 451
 452
 453 static void ti_release(struct usb_serial *serial)
 454 {
 455         int i;
 456         struct ti_device *tdev = usb_get_serial_data(serial);
 457         struct ti_port *tport;
 458
 459         for (i = 0; i < serial->num_ports; ++i) {
 460                 tport = usb_get_serial_port_data(serial->port[i]);
 461                 if (tport) {
 462                         kfifo_free(&tport->write_fifo);
 463                         kfree(tport);
 464                 }
 465         }
 466
 467         kfree(tdev);
 468 }
 469
 470
 471 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 472 {
 473         struct ti_port *tport = usb_get_serial_port_data(port);
 474         struct ti_device *tdev;
 475         struct usb_device *dev;
 476         struct urb *urb;
 477         int port_number;
 478         int status;
 479         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 480                              TI_PIPE_TIMEOUT_ENABLE |
 481                              (TI_TRANSFER_TIMEOUT << 2));
 482
 483         if (tport == NULL)
 484                 return -ENODEV;
 485
 486         dev = port->serial->dev;
 487         tdev = tport->tp_tdev;
 488
 489         /* only one open on any port on a device at a time */
 490         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 491                 return -ERESTARTSYS;
 492
 493         port_number = port->number - port->serial->minor;
 494
 495         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 496
 497         tport->tp_msr = 0;
 498         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 499
 500         /* start interrupt urb the first time a port is opened on this device */
 501         if (tdev->td_open_port_count == 0) {
 502                 dbg("%s - start interrupt in urb", __func__);
 503                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 504                 if (!urb) {
 505                         dev_err(&port->dev, "%s - no interrupt urb\n",
 506                                                                 __func__);
 507                         status = -EINVAL;
 508                         goto release_lock;
 509                 }
 510                 urb->context = tdev;
 511                 status = usb_submit_urb(urb, GFP_KERNEL);
 512                 if (status) {
 513                         dev_err(&port->dev,
 514                                 "%s - submit interrupt urb failed, %d\n",
 515                                         __func__, status);
 516                         goto release_lock;
 517                 }
 518         }
 519
 520         if (tty)
 521                 ti_set_termios(tty, port, tty->termios);
 522
 523         dbg("%s - sending TI_OPEN_PORT", __func__);
 524         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 525                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 526         if (status) {
 527                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 528                                                         __func__, status);
 529                 goto unlink_int_urb;
 530         }
 531
 532         dbg("%s - sending TI_START_PORT", __func__);
 533         status = ti_command_out_sync(tdev, TI_START_PORT,
 534                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 535         if (status) {
 536                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 537                                                         __func__, status);
 538                 goto unlink_int_urb;
 539         }
 540
 541         dbg("%s - sending TI_PURGE_PORT", __func__);
 542         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 543                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 544         if (status) {
 545                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 546                                                         __func__, status);
 547                 goto unlink_int_urb;
 548         }
 549         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 550                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 551         if (status) {
 552                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 553                                                         __func__, status);
 554                 goto unlink_int_urb;
 555         }
 556
 557         /* reset the data toggle on the bulk endpoints to work around bug in
 558          * host controllers where things get out of sync some times */
 559         usb_clear_halt(dev, port->write_urb->pipe);
 560         usb_clear_halt(dev, port->read_urb->pipe);
 561
 562         if (tty)
 563                 ti_set_termios(tty, port, tty->termios);
 564
 565         dbg("%s - sending TI_OPEN_PORT (2)", __func__);
 566         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 567                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 568         if (status) {
 569                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 570                                                         __func__, status);
 571                 goto unlink_int_urb;
 572         }
 573
 574         dbg("%s - sending TI_START_PORT (2)", __func__);
 575         status = ti_command_out_sync(tdev, TI_START_PORT,
 576                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 577         if (status) {
 578                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 579                                                         __func__, status);
 580                 goto unlink_int_urb;
 581         }
 582
 583         /* start read urb */
 584         dbg("%s - start read urb", __func__);
 585         urb = port->read_urb;
 586         if (!urb) {
 587                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 588                 status = -EINVAL;
 589                 goto unlink_int_urb;
 590         }
 591         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 592         urb->context = tport;
 593         status = usb_submit_urb(urb, GFP_KERNEL);
 594         if (status) {
 595                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 596                                                         __func__, status);
 597                 goto unlink_int_urb;
 598         }
 599
 600         tport->tp_is_open = 1;
 601         ++tdev->td_open_port_count;
 602
 603         goto release_lock;
 604
 605 unlink_int_urb:
 606         if (tdev->td_open_port_count == 0)
 607                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 608 release_lock:
 609         mutex_unlock(&tdev->td_open_close_lock);
 610         dbg("%s - exit %d", __func__, status);
 611         return status;
 612 }
 613
 614
 615 static void ti_close(struct usb_serial_port *port)
 616 {
 617         struct ti_device *tdev;
 618         struct ti_port *tport;
 619         int port_number;
 620         int status;
 621         int do_unlock;
 622
 623         tdev = usb_get_serial_data(port->serial);
 624         tport = usb_get_serial_port_data(port);
 625         if (tdev == NULL || tport == NULL)
 626                 return;
 627
 628         tport->tp_is_open = 0;
 629
 630         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 631
 632         usb_kill_urb(port->read_urb);
 633         usb_kill_urb(port->write_urb);
 634         tport->tp_write_urb_in_use = 0;
 635
 636         port_number = port->number - port->serial->minor;
 637
 638         dbg("%s - sending TI_CLOSE_PORT", __func__);
 639         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 640                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 641         if (status)
 642                 dev_err(&port->dev,
 643                         "%s - cannot send close port command, %d\n"
 644                                                         , __func__, status);
 645
 646         /* if mutex_lock is interrupted, continue anyway */
 647         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 648         --tport->tp_tdev->td_open_port_count;
 649         if (tport->tp_tdev->td_open_port_count <= 0) {
 650                 /* last port is closed, shut down interrupt urb */
 651                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 652                 tport->tp_tdev->td_open_port_count = 0;
 653         }
 654         if (do_unlock)
 655                 mutex_unlock(&tdev->td_open_close_lock);
 656 }
 657
 658
 659 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 660                         const unsigned char *data, int count)
 661 {
 662         struct ti_port *tport = usb_get_serial_port_data(port);
 663
 664         if (count == 0) {
 665                 dbg("%s - write request of 0 bytes", __func__);
 666                 return 0;
 667         }
 668
 669         if (tport == NULL || !tport->tp_is_open)
 670                 return -ENODEV;
 671
 672         count = kfifo_in_locked(&tport->write_fifo, data, count,
 673                                                         &tport->tp_lock);
 674         ti_send(tport);
 675
 676         return count;
 677 }
 678
 679
 680 static int ti_write_room(struct tty_struct *tty)
 681 {
 682         struct usb_serial_port *port = tty->driver_data;
 683         struct ti_port *tport = usb_get_serial_port_data(port);
 684         int room = 0;
 685         unsigned long flags;
 686
 687         if (tport == NULL)
 688                 return 0;
 689
 690         spin_lock_irqsave(&tport->tp_lock, flags);
 691         room = kfifo_avail(&tport->write_fifo);
 692         spin_unlock_irqrestore(&tport->tp_lock, flags);
 693
 694         dbg("%s - returns %d", __func__, room);
 695         return room;
 696 }
 697
 698
 699 static int ti_chars_in_buffer(struct tty_struct *tty)
 700 {
 701         struct usb_serial_port *port = tty->driver_data;
 702         struct ti_port *tport = usb_get_serial_port_data(port);
 703         int chars = 0;
 704         unsigned long flags;
 705
 706         if (tport == NULL)
 707                 return 0;
 708
 709         spin_lock_irqsave(&tport->tp_lock, flags);
 710         chars = kfifo_len(&tport->write_fifo);
 711         spin_unlock_irqrestore(&tport->tp_lock, flags);
 712
 713         dbg("%s - returns %d", __func__, chars);
 714         return chars;
 715 }
 716
 717
 718 static void ti_throttle(struct tty_struct *tty)
 719 {
 720         struct usb_serial_port *port = tty->driver_data;
 721         struct ti_port *tport = usb_get_serial_port_data(port);
 722
 723         if (tport == NULL)
 724                 return;
 725
 726         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 727                 ti_stop_read(tport, tty);
 728
 729 }
 730
 731
 732 static void ti_unthrottle(struct tty_struct *tty)
 733 {
 734         struct usb_serial_port *port = tty->driver_data;
 735         struct ti_port *tport = usb_get_serial_port_data(port);
 736         int status;
 737
 738         if (tport == NULL)
 739                 return;
 740
 741         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 742                 status = ti_restart_read(tport, tty);
 743                 if (status)
 744                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 745                                                         __func__, status);
 746         }
 747 }
 748
 749 static int ti_get_icount(struct tty_struct *tty,
 750                 struct serial_icounter_struct *icount)
 751 {
 752         struct usb_serial_port *port = tty->driver_data;
 753         struct ti_port *tport = usb_get_serial_port_data(port);
 754         struct async_icount cnow = tport->tp_icount;
 755
 756         dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
 757                 __func__, port->number,
 758                 cnow.rx, cnow.tx);
 759
 760         icount->cts = cnow.cts;
 761         icount->dsr = cnow.dsr;
 762         icount->rng = cnow.rng;
 763         icount->dcd = cnow.dcd;
 764         icount->rx = cnow.rx;
 765         icount->tx = cnow.tx;
 766         icount->frame = cnow.frame;
 767         icount->overrun = cnow.overrun;
 768         icount->parity = cnow.parity;
 769         icount->brk = cnow.brk;
 770         icount->buf_overrun = cnow.buf_overrun;
 771
 772         return 0;
 773 }
 774
 775 static int ti_ioctl(struct tty_struct *tty,
 776         unsigned int cmd, unsigned long arg)
 777 {
 778         struct usb_serial_port *port = tty->driver_data;
 779         struct ti_port *tport = usb_get_serial_port_data(port);
 780         struct async_icount cnow;
 781         struct async_icount cprev;
 782
 783         dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
 784
 785         if (tport == NULL)
 786                 return -ENODEV;
 787
 788         switch (cmd) {
 789         case TIOCGSERIAL:
 790                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
 791                 return ti_get_serial_info(tport,
 792                                 (struct serial_struct __user *)arg);
 793         case TIOCSSERIAL:
 794                 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
 795                 return ti_set_serial_info(tty, tport,
 796                                 (struct serial_struct __user *)arg);
 797         case TIOCMIWAIT:
 798                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
 799                 cprev = tport->tp_icount;
 800                 while (1) {
 801                         interruptible_sleep_on(&tport->tp_msr_wait);
 802                         if (signal_pending(current))
 803                                 return -ERESTARTSYS;
 804                         cnow = tport->tp_icount;
 805                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 806                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 807                                 return -EIO; /* no change => error */
 808                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 809                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 810                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 811                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
 812                                 return 0;
 813                         cprev = cnow;
 814                 }
 815                 break;
 816         }
 817         return -ENOIOCTLCMD;
 818 }
 819
 820
 821 static void ti_set_termios(struct tty_struct *tty,
 822                 struct usb_serial_port *port, struct ktermios *old_termios)
 823 {
 824         struct ti_port *tport = usb_get_serial_port_data(port);
 825         struct ti_uart_config *config;
 826         tcflag_t cflag, iflag;
 827         int baud;
 828         int status;
 829         int port_number = port->number - port->serial->minor;
 830         unsigned int mcr;
 831
 832         cflag = tty->termios->c_cflag;
 833         iflag = tty->termios->c_iflag;
 834
 835         dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
 836         dbg("%s - old clfag %08x, old iflag %08x", __func__,
 837                                 old_termios->c_cflag, old_termios->c_iflag);
 838
 839         if (tport == NULL)
 840                 return;
 841
 842         config = kmalloc(sizeof(*config), GFP_KERNEL);
 843         if (!config) {
 844                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 845                 return;
 846         }
 847
 848         config->wFlags = 0;
 849
 850         /* these flags must be set */
 851         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 852         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 853         config->bUartMode = (__u8)(tport->tp_uart_mode);
 854
 855         switch (cflag & CSIZE) {
 856         case CS5:
 857                     config->bDataBits = TI_UART_5_DATA_BITS;
 858                     break;
 859         case CS6:
 860                     config->bDataBits = TI_UART_6_DATA_BITS;
 861                     break;
 862         case CS7:
 863                     config->bDataBits = TI_UART_7_DATA_BITS;
 864                     break;
 865         default:
 866         case CS8:
 867                     config->bDataBits = TI_UART_8_DATA_BITS;
 868                     break;
 869         }
 870
 871         /* CMSPAR isn't supported by this driver */
 872         tty->termios->c_cflag &= ~CMSPAR;
 873
 874         if (cflag & PARENB) {
 875                 if (cflag & PARODD) {
 876                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 877                         config->bParity = TI_UART_ODD_PARITY;
 878                 } else {
 879                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 880                         config->bParity = TI_UART_EVEN_PARITY;
 881                 }
 882         } else {
 883                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 884                 config->bParity = TI_UART_NO_PARITY;
 885         }
 886
 887         if (cflag & CSTOPB)
 888                 config->bStopBits = TI_UART_2_STOP_BITS;
 889         else
 890                 config->bStopBits = TI_UART_1_STOP_BITS;
 891
 892         if (cflag & CRTSCTS) {
 893                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 894                 if ((cflag & CBAUD) != B0)
 895                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 896                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 897         } else {
 898                 tty->hw_stopped = 0;
 899                 ti_restart_read(tport, tty);
 900         }
 901
 902         if (I_IXOFF(tty) || I_IXON(tty)) {
 903                 config->cXon  = START_CHAR(tty);
 904                 config->cXoff = STOP_CHAR(tty);
 905
 906                 if (I_IXOFF(tty))
 907                         config->wFlags |= TI_UART_ENABLE_X_IN;
 908                 else
 909                         ti_restart_read(tport, tty);
 910
 911                 if (I_IXON(tty))
 912                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 913         }
 914
 915         baud = tty_get_baud_rate(tty);
 916         if (!baud)
 917                 baud = 9600;
 918         if (tport->tp_tdev->td_is_3410)
 919                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 920         else
 921                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 922
 923         /* FIXME: Should calculate resulting baud here and report it back */
 924         if ((cflag & CBAUD) != B0)
 925                 tty_encode_baud_rate(tty, baud, baud);
 926
 927         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 928         __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
 929
 930         cpu_to_be16s(&config->wBaudRate);
 931         cpu_to_be16s(&config->wFlags);
 932
 933         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 934                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 935                 sizeof(*config));
 936         if (status)
 937                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 938                                         __func__, port_number, status);
 939
 940         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 941         mcr = tport->tp_shadow_mcr;
 942         /* if baud rate is B0, clear RTS and DTR */
 943         if ((cflag & CBAUD) == B0)
 944                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 945         status = ti_set_mcr(tport, mcr);
 946         if (status)
 947                 dev_err(&port->dev,
 948                         "%s - cannot set modem control on port %d, %d\n",
 949                                                 __func__, port_number, status);
 950
 951         kfree(config);
 952 }
 953
 954
 955 static int ti_tiocmget(struct tty_struct *tty)
 956 {
 957         struct usb_serial_port *port = tty->driver_data;
 958         struct ti_port *tport = usb_get_serial_port_data(port);
 959         unsigned int result;
 960         unsigned int msr;
 961         unsigned int mcr;
 962         unsigned long flags;
 963
 964         if (tport == NULL)
 965                 return -ENODEV;
 966
 967         spin_lock_irqsave(&tport->tp_lock, flags);
 968         msr = tport->tp_msr;
 969         mcr = tport->tp_shadow_mcr;
 970         spin_unlock_irqrestore(&tport->tp_lock, flags);
 971
 972         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
 973                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
 974                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
 975                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
 976                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
 977                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
 978                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
 979
 980         dbg("%s - 0x%04X", __func__, result);
 981
 982         return result;
 983 }
 984
 985
 986 static int ti_tiocmset(struct tty_struct *tty,
 987                                 unsigned int set, unsigned int clear)
 988 {
 989         struct usb_serial_port *port = tty->driver_data;
 990         struct ti_port *tport = usb_get_serial_port_data(port);
 991         unsigned int mcr;
 992         unsigned long flags;
 993
 994         if (tport == NULL)
 995                 return -ENODEV;
 996
 997         spin_lock_irqsave(&tport->tp_lock, flags);
 998         mcr = tport->tp_shadow_mcr;
 999
1000         if (set & TIOCM_RTS)
1001                 mcr |= TI_MCR_RTS;
1002         if (set & TIOCM_DTR)
1003                 mcr |= TI_MCR_DTR;
1004         if (set & TIOCM_LOOP)
1005                 mcr |= TI_MCR_LOOP;
1006
1007         if (clear & TIOCM_RTS)
1008                 mcr &= ~TI_MCR_RTS;
1009         if (clear & TIOCM_DTR)
1010                 mcr &= ~TI_MCR_DTR;
1011         if (clear & TIOCM_LOOP)
1012                 mcr &= ~TI_MCR_LOOP;
1013         spin_unlock_irqrestore(&tport->tp_lock, flags);
1014
1015         return ti_set_mcr(tport, mcr);
1016 }
1017
1018
1019 static void ti_break(struct tty_struct *tty, int break_state)
1020 {
1021         struct usb_serial_port *port = tty->driver_data;
1022         struct ti_port *tport = usb_get_serial_port_data(port);
1023         int status;
1024
1025         dbg("%s - state = %d", __func__, break_state);
1026
1027         if (tport == NULL)
1028                 return;
1029
1030         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1031
1032         status = ti_write_byte(tport->tp_tdev,
1033                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1034                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1035
1036         if (status)
1037                 dbg("%s - error setting break, %d", __func__, status);
1038 }
1039
1040
1041 static void ti_interrupt_callback(struct urb *urb)
1042 {
1043         struct ti_device *tdev = urb->context;
1044         struct usb_serial_port *port;
1045         struct usb_serial *serial = tdev->td_serial;
1046         struct ti_port *tport;
1047         struct device *dev = &urb->dev->dev;
1048         unsigned char *data = urb->transfer_buffer;
1049         int length = urb->actual_length;
1050         int port_number;
1051         int function;
1052         int status = urb->status;
1053         int retval;
1054         __u8 msr;
1055
1056         switch (status) {
1057         case 0:
1058                 break;
1059         case -ECONNRESET:
1060         case -ENOENT:
1061         case -ESHUTDOWN:
1062                 dbg("%s - urb shutting down, %d", __func__, status);
1063                 tdev->td_urb_error = 1;
1064                 return;
1065         default:
1066                 dev_err(dev, "%s - nonzero urb status, %d\n",
1067                         __func__, status);
1068                 tdev->td_urb_error = 1;
1069                 goto exit;
1070         }
1071
1072         if (length != 2) {
1073                 dbg("%s - bad packet size, %d", __func__, length);
1074                 goto exit;
1075         }
1076
1077         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1078                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1079                 goto exit;
1080         }
1081
1082         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1083         function = TI_GET_FUNC_FROM_CODE(data[0]);
1084
1085         dbg("%s - port_number %d, function %d, data 0x%02X",
1086                                 __func__, port_number, function, data[1]);
1087
1088         if (port_number >= serial->num_ports) {
1089                 dev_err(dev, "%s - bad port number, %d\n",
1090                                                 __func__, port_number);
1091                 goto exit;
1092         }
1093
1094         port = serial->port[port_number];
1095
1096         tport = usb_get_serial_port_data(port);
1097         if (!tport)
1098                 goto exit;
1099
1100         switch (function) {
1101         case TI_CODE_DATA_ERROR:
1102                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1103                                         __func__, port_number, data[1]);
1104                 break;
1105
1106         case TI_CODE_MODEM_STATUS:
1107                 msr = data[1];
1108                 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1109                 ti_handle_new_msr(tport, msr);
1110                 break;
1111
1112         default:
1113                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1114                                                         __func__, data[1]);
1115                 break;
1116         }
1117
1118 exit:
1119         retval = usb_submit_urb(urb, GFP_ATOMIC);
1120         if (retval)
1121                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1122                         __func__, retval);
1123 }
1124
1125
1126 static void ti_bulk_in_callback(struct urb *urb)
1127 {
1128         struct ti_port *tport = urb->context;
1129         struct usb_serial_port *port = tport->tp_port;
1130         struct device *dev = &urb->dev->dev;
1131         int status = urb->status;
1132         int retval = 0;
1133         struct tty_struct *tty;
1134
1135         switch (status) {
1136         case 0:
1137                 break;
1138         case -ECONNRESET:
1139         case -ENOENT:
1140         case -ESHUTDOWN:
1141                 dbg("%s - urb shutting down, %d", __func__, status);
1142                 tport->tp_tdev->td_urb_error = 1;
1143                 wake_up_interruptible(&tport->tp_write_wait);
1144                 return;
1145         default:
1146                 dev_err(dev, "%s - nonzero urb status, %d\n",
1147                         __func__, status);
1148                 tport->tp_tdev->td_urb_error = 1;
1149                 wake_up_interruptible(&tport->tp_write_wait);
1150         }
1151
1152         if (status == -EPIPE)
1153                 goto exit;
1154
1155         if (status) {
1156                 dev_err(dev, "%s - stopping read!\n", __func__);
1157                 return;
1158         }
1159
1160         tty = tty_port_tty_get(&port->port);
1161         if (tty) {
1162                 if (urb->actual_length) {
1163                         usb_serial_debug_data(debug, dev, __func__,
1164                                 urb->actual_length, urb->transfer_buffer);
1165
1166                         if (!tport->tp_is_open)
1167                                 dbg("%s - port closed, dropping data",
1168                                         __func__);
1169                         else
1170                                 ti_recv(&urb->dev->dev, tty,
1171                                                 urb->transfer_buffer,
1172                                                 urb->actual_length);
1173                         spin_lock(&tport->tp_lock);
1174                         tport->tp_icount.rx += urb->actual_length;
1175                         spin_unlock(&tport->tp_lock);
1176                 }
1177                 tty_kref_put(tty);
1178         }
1179
1180 exit:
1181         /* continue to read unless stopping */
1182         spin_lock(&tport->tp_lock);
1183         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1184                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1185         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1186                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1187
1188         spin_unlock(&tport->tp_lock);
1189         if (retval)
1190                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1191                         __func__, retval);
1192 }
1193
1194
1195 static void ti_bulk_out_callback(struct urb *urb)
1196 {
1197         struct ti_port *tport = urb->context;
1198         struct usb_serial_port *port = tport->tp_port;
1199         int status = urb->status;
1200
1201         tport->tp_write_urb_in_use = 0;
1202
1203         switch (status) {
1204         case 0:
1205                 break;
1206         case -ECONNRESET:
1207         case -ENOENT:
1208         case -ESHUTDOWN:
1209                 dbg("%s - urb shutting down, %d", __func__, status);
1210                 tport->tp_tdev->td_urb_error = 1;
1211                 wake_up_interruptible(&tport->tp_write_wait);
1212                 return;
1213         default:
1214                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1215                         __func__, status);
1216                 tport->tp_tdev->td_urb_error = 1;
1217                 wake_up_interruptible(&tport->tp_write_wait);
1218         }
1219
1220         /* send any buffered data */
1221         ti_send(tport);
1222 }
1223
1224
1225 static void ti_recv(struct device *dev, struct tty_struct *tty,
1226         unsigned char *data, int length)
1227 {
1228         int cnt;
1229
1230         do {
1231                 cnt = tty_insert_flip_string(tty, data, length);
1232                 if (cnt < length) {
1233                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1234                                                 __func__, length - cnt);
1235                         if (cnt == 0)
1236                                 break;
1237                 }
1238                 tty_flip_buffer_push(tty);
1239                 data += cnt;
1240                 length -= cnt;
1241         } while (length > 0);
1242
1243 }
1244
1245
1246 static void ti_send(struct ti_port *tport)
1247 {
1248         int count, result;
1249         struct usb_serial_port *port = tport->tp_port;
1250         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1251         unsigned long flags;
1252
1253         spin_lock_irqsave(&tport->tp_lock, flags);
1254
1255         if (tport->tp_write_urb_in_use)
1256                 goto unlock;
1257
1258         count = kfifo_out(&tport->write_fifo,
1259                                 port->write_urb->transfer_buffer,
1260                                 port->bulk_out_size);
1261
1262         if (count == 0)
1263                 goto unlock;
1264
1265         tport->tp_write_urb_in_use = 1;
1266
1267         spin_unlock_irqrestore(&tport->tp_lock, flags);
1268
1269         usb_serial_debug_data(debug, &port->dev, __func__, count,
1270                                         port->write_urb->transfer_buffer);
1271
1272         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1273                            usb_sndbulkpipe(port->serial->dev,
1274                                             port->bulk_out_endpointAddress),
1275                            port->write_urb->transfer_buffer, count,
1276                            ti_bulk_out_callback, tport);
1277
1278         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1279         if (result) {
1280                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1281                                                         __func__, result);
1282                 tport->tp_write_urb_in_use = 0;
1283                 /* TODO: reschedule ti_send */
1284         } else {
1285                 spin_lock_irqsave(&tport->tp_lock, flags);
1286                 tport->tp_icount.tx += count;
1287                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1288         }
1289
1290         /* more room in the buffer for new writes, wakeup */
1291         if (tty)
1292                 tty_wakeup(tty);
1293         tty_kref_put(tty);
1294         wake_up_interruptible(&tport->tp_write_wait);
1295         return;
1296 unlock:
1297         spin_unlock_irqrestore(&tport->tp_lock, flags);
1298         tty_kref_put(tty);
1299         return;
1300 }
1301
1302
1303 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1304 {
1305         unsigned long flags;
1306         int status;
1307
1308         status = ti_write_byte(tport->tp_tdev,
1309                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1310                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1311
1312         spin_lock_irqsave(&tport->tp_lock, flags);
1313         if (!status)
1314                 tport->tp_shadow_mcr = mcr;
1315         spin_unlock_irqrestore(&tport->tp_lock, flags);
1316
1317         return status;
1318 }
1319
1320
1321 static int ti_get_lsr(struct ti_port *tport)
1322 {
1323         int size, status;
1324         struct ti_device *tdev = tport->tp_tdev;
1325         struct usb_serial_port *port = tport->tp_port;
1326         int port_number = port->number - port->serial->minor;
1327         struct ti_port_status *data;
1328
1329         size = sizeof(struct ti_port_status);
1330         data = kmalloc(size, GFP_KERNEL);
1331         if (!data) {
1332                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1333                 return -ENOMEM;
1334         }
1335
1336         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1337                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1338         if (status) {
1339                 dev_err(&port->dev,
1340                         "%s - get port status command failed, %d\n",
1341                                                         __func__, status);
1342                 goto free_data;
1343         }
1344
1345         dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1346
1347         tport->tp_lsr = data->bLSR;
1348
1349 free_data:
1350         kfree(data);
1351         return status;
1352 }
1353
1354
1355 static int ti_get_serial_info(struct ti_port *tport,
1356         struct serial_struct __user *ret_arg)
1357 {
1358         struct usb_serial_port *port = tport->tp_port;
1359         struct serial_struct ret_serial;
1360
1361         if (!ret_arg)
1362                 return -EFAULT;
1363
1364         memset(&ret_serial, 0, sizeof(ret_serial));
1365
1366         ret_serial.type = PORT_16550A;
1367         ret_serial.line = port->serial->minor;
1368         ret_serial.port = port->number - port->serial->minor;
1369         ret_serial.flags = tport->tp_flags;
1370         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1371         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1372         ret_serial.closing_wait = tport->tp_closing_wait;
1373
1374         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1375                 return -EFAULT;
1376
1377         return 0;
1378 }
1379
1380
1381 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1382         struct serial_struct __user *new_arg)
1383 {
1384         struct serial_struct new_serial;
1385
1386         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1387                 return -EFAULT;
1388
1389         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1390         tport->tp_closing_wait = new_serial.closing_wait;
1391
1392         return 0;
1393 }
1394
1395
1396 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1397 {
1398         struct async_icount *icount;
1399         struct tty_struct *tty;
1400         unsigned long flags;
1401
1402         dbg("%s - msr 0x%02X", __func__, msr);
1403
1404         if (msr & TI_MSR_DELTA_MASK) {
1405                 spin_lock_irqsave(&tport->tp_lock, flags);
1406                 icount = &tport->tp_icount;
1407                 if (msr & TI_MSR_DELTA_CTS)
1408                         icount->cts++;
1409                 if (msr & TI_MSR_DELTA_DSR)
1410                         icount->dsr++;
1411                 if (msr & TI_MSR_DELTA_CD)
1412                         icount->dcd++;
1413                 if (msr & TI_MSR_DELTA_RI)
1414                         icount->rng++;
1415                 wake_up_interruptible(&tport->tp_msr_wait);
1416                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1417         }
1418
1419         tport->tp_msr = msr & TI_MSR_MASK;
1420
1421         /* handle CTS flow control */
1422         tty = tty_port_tty_get(&tport->tp_port->port);
1423         if (tty && C_CRTSCTS(tty)) {
1424                 if (msr & TI_MSR_CTS) {
1425                         tty->hw_stopped = 0;
1426                         tty_wakeup(tty);
1427                 } else {
1428                         tty->hw_stopped = 1;
1429                 }
1430         }
1431         tty_kref_put(tty);
1432 }
1433
1434
1435 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1436 {
1437         struct ti_device *tdev = tport->tp_tdev;
1438         struct usb_serial_port *port = tport->tp_port;
1439         wait_queue_t wait;
1440
1441         spin_lock_irq(&tport->tp_lock);
1442
1443         /* wait for data to drain from the buffer */
1444         tdev->td_urb_error = 0;
1445         init_waitqueue_entry(&wait, current);
1446         add_wait_queue(&tport->tp_write_wait, &wait);
1447         for (;;) {
1448                 set_current_state(TASK_INTERRUPTIBLE);
1449                 if (kfifo_len(&tport->write_fifo) == 0
1450                 || timeout == 0 || signal_pending(current)
1451                 || tdev->td_urb_error
1452                 || port->serial->disconnected)  /* disconnect */
1453                         break;
1454                 spin_unlock_irq(&tport->tp_lock);
1455                 timeout = schedule_timeout(timeout);
1456                 spin_lock_irq(&tport->tp_lock);
1457         }
1458         set_current_state(TASK_RUNNING);
1459         remove_wait_queue(&tport->tp_write_wait, &wait);
1460
1461         /* flush any remaining data in the buffer */
1462         if (flush)
1463                 kfifo_reset_out(&tport->write_fifo);
1464
1465         spin_unlock_irq(&tport->tp_lock);
1466
1467         mutex_lock(&port->serial->disc_mutex);
1468         /* wait for data to drain from the device */
1469         /* wait for empty tx register, plus 20 ms */
1470         timeout += jiffies;
1471         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1472         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1473         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1474         && !port->serial->disconnected) {
1475                 if (ti_get_lsr(tport))
1476                         break;
1477                 mutex_unlock(&port->serial->disc_mutex);
1478                 msleep_interruptible(20);
1479                 mutex_lock(&port->serial->disc_mutex);
1480         }
1481         mutex_unlock(&port->serial->disc_mutex);
1482 }
1483
1484
1485 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1486 {
1487         unsigned long flags;
1488
1489         spin_lock_irqsave(&tport->tp_lock, flags);
1490
1491         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1492                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1493
1494         spin_unlock_irqrestore(&tport->tp_lock, flags);
1495 }
1496
1497
1498 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1499 {
1500         struct urb *urb;
1501         int status = 0;
1502         unsigned long flags;
1503
1504         spin_lock_irqsave(&tport->tp_lock, flags);
1505
1506         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1507                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1508                 urb = tport->tp_port->read_urb;
1509                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1510                 urb->context = tport;
1511                 status = usb_submit_urb(urb, GFP_KERNEL);
1512         } else  {
1513                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1514                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1515         }
1516
1517         return status;
1518 }
1519
1520
1521 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1522         __u16 moduleid, __u16 value, __u8 *data, int size)
1523 {
1524         int status;
1525
1526         status = usb_control_msg(tdev->td_serial->dev,
1527                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1528                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1529                 value, moduleid, data, size, 1000);
1530
1531         if (status == size)
1532                 status = 0;
1533
1534         if (status > 0)
1535                 status = -ECOMM;
1536
1537         return status;
1538 }
1539
1540
1541 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1542         __u16 moduleid, __u16 value, __u8 *data, int size)
1543 {
1544         int status;
1545
1546         status = usb_control_msg(tdev->td_serial->dev,
1547                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1548                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1549                 value, moduleid, data, size, 1000);
1550
1551         if (status == size)
1552                 status = 0;
1553
1554         if (status > 0)
1555                 status = -ECOMM;
1556
1557         return status;
1558 }
1559
1560
1561 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1562         __u8 mask, __u8 byte)
1563 {
1564         int status;
1565         unsigned int size;
1566         struct ti_write_data_bytes *data;
1567         struct device *dev = &tdev->td_serial->dev->dev;
1568
1569         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1570                                         __func__, addr, mask, byte);
1571
1572         size = sizeof(struct ti_write_data_bytes) + 2;
1573         data = kmalloc(size, GFP_KERNEL);
1574         if (!data) {
1575                 dev_err(dev, "%s - out of memory\n", __func__);
1576                 return -ENOMEM;
1577         }
1578
1579         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1580         data->bDataType = TI_RW_DATA_BYTE;
1581         data->bDataCounter = 1;
1582         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1583         data->wBaseAddrLo = cpu_to_be16(addr);
1584         data->bData[0] = mask;
1585         data->bData[1] = byte;
1586
1587         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1588                 (__u8 *)data, size);
1589
1590         if (status < 0)
1591                 dev_err(dev, "%s - failed, %d\n", __func__, status);
1592
1593         kfree(data);
1594
1595         return status;
1596 }
1597
1598 static int ti_do_download(struct usb_device *dev, int pipe,
1599                                                 u8 *buffer, int size)
1600 {
1601         int pos;
1602         u8 cs = 0;
1603         int done;
1604         struct ti_firmware_header *header;
1605         int status = 0;
1606         int len;
1607
1608         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1609                 cs = (__u8)(cs + buffer[pos]);
1610
1611         header = (struct ti_firmware_header *)buffer;
1612         header->wLength = cpu_to_le16((__u16)(size
1613                                         - sizeof(struct ti_firmware_header)));
1614         header->bCheckSum = cs;
1615
1616         dbg("%s - downloading firmware", __func__);
1617         for (pos = 0; pos < size; pos += done) {
1618                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1619                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1620                                                                 &done, 1000);
1621                 if (status)
1622                         break;
1623         }
1624         return status;
1625 }
1626
1627 static int ti_download_firmware(struct ti_device *tdev)
1628 {
1629         int status;
1630         int buffer_size;
1631         __u8 *buffer;
1632         struct usb_device *dev = tdev->td_serial->dev;
1633         unsigned int pipe = usb_sndbulkpipe(dev,
1634                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1635         const struct firmware *fw_p;
1636         char buf[32];
1637
1638         /* try ID specific firmware first, then try generic firmware */
1639         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1640             dev->descriptor.idProduct);
1641         status = request_firmware(&fw_p, buf, &dev->dev);
1642
1643         if (status != 0) {
1644                 buf[0] = '\0';
1645                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1646                         switch (dev->descriptor.idProduct) {
1647                         case MTS_CDMA_PRODUCT_ID:
1648                                 strcpy(buf, "mts_cdma.fw");
1649                                 break;
1650                         case MTS_GSM_PRODUCT_ID:
1651                                 strcpy(buf, "mts_gsm.fw");
1652                                 break;
1653                         case MTS_EDGE_PRODUCT_ID:
1654                                 strcpy(buf, "mts_edge.fw");
1655                                 break;
1656                         case MTS_MT9234MU_PRODUCT_ID:
1657                                 strcpy(buf, "mts_mt9234mu.fw");
1658                                 break;
1659                         case MTS_MT9234ZBA_PRODUCT_ID:
1660                                 strcpy(buf, "mts_mt9234zba.fw");
1661                                 break;
1662                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1663                                 strcpy(buf, "mts_mt9234zba.fw");
1664                                 break;                  }
1665                 }
1666                 if (buf[0] == '\0') {
1667                         if (tdev->td_is_3410)
1668                                 strcpy(buf, "ti_3410.fw");
1669                         else
1670                                 strcpy(buf, "ti_5052.fw");
1671                 }
1672                 status = request_firmware(&fw_p, buf, &dev->dev);
1673         }
1674         if (status) {
1675                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1676                 return -ENOENT;
1677         }
1678         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1679                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1680                 release_firmware(fw_p);
1681                 return -ENOENT;
1682         }
1683
1684         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1685         buffer = kmalloc(buffer_size, GFP_KERNEL);
1686         if (buffer) {
1687                 memcpy(buffer, fw_p->data, fw_p->size);
1688                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1689                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1690                 kfree(buffer);
1691         } else {
1692                 dbg("%s ENOMEM\n", __func__);
1693                 status = -ENOMEM;
1694         }
1695         release_firmware(fw_p);
1696         if (status) {
1697                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1698                                                         __func__, status);
1699                 return status;
1700         }
1701
1702         dbg("%s - download successful", __func__);
1703
1704         return 0;
1705 }