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