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 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 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 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 == NULL) {
 305                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 306                 return -ENOMEM;
 307         }
 308         mutex_init(&tdev->td_open_close_lock);
 309         tdev->td_serial = serial;
 310         usb_set_serial_data(serial, tdev);
 311
 312         /* determine device type */
 313         if (serial->type == &ti_1port_device)
 314                 tdev->td_is_3410 = 1;
 315         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
 316                 tdev->td_is_3410 ? "3410" : "5052");
 317
 318         /* if we have only 1 configuration, download firmware */
 319         if (dev->descriptor.bNumConfigurations == 1) {
 320                 status = ti_download_firmware(tdev);
 321
 322                 if (status != 0)
 323                         goto free_tdev;
 324
 325                 /* 3410 must be reset, 5052 resets itself */
 326                 if (tdev->td_is_3410) {
 327                         msleep_interruptible(100);
 328                         usb_reset_device(dev);
 329                 }
 330
 331                 status = -ENODEV;
 332                 goto free_tdev;
 333         }
 334
 335         /* the second configuration must be set */
 336         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 337                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 338                 status = status ? status : -ENODEV;
 339                 goto free_tdev;
 340         }
 341
 342         return 0;
 343
 344 free_tdev:
 345         kfree(tdev);
 346         usb_set_serial_data(serial, NULL);
 347         return status;
 348 }
 349
 350
 351 static void ti_release(struct usb_serial *serial)
 352 {
 353         struct ti_device *tdev = usb_get_serial_data(serial);
 354
 355         kfree(tdev);
 356 }
 357
 358 static int ti_port_probe(struct usb_serial_port *port)
 359 {
 360         struct ti_port *tport;
 361
 362         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
 363         if (!tport)
 364                 return -ENOMEM;
 365
 366         spin_lock_init(&tport->tp_lock);
 367         if (port == port->serial->port[0])
 368                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
 369         else
 370                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
 371         port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
 372         tport->tp_port = port;
 373         tport->tp_tdev = usb_get_serial_data(port->serial);
 374         tport->tp_uart_mode = 0;        /* default is RS232 */
 375
 376         usb_set_serial_port_data(port, tport);
 377
 378         port->port.drain_delay = 3;
 379
 380         return 0;
 381 }
 382
 383 static int ti_port_remove(struct usb_serial_port *port)
 384 {
 385         struct ti_port *tport;
 386
 387         tport = usb_get_serial_port_data(port);
 388         kfree(tport);
 389
 390         return 0;
 391 }
 392
 393 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 394 {
 395         struct ti_port *tport = usb_get_serial_port_data(port);
 396         struct ti_device *tdev;
 397         struct usb_device *dev;
 398         struct urb *urb;
 399         int port_number;
 400         int status;
 401         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 402                              TI_PIPE_TIMEOUT_ENABLE |
 403                              (TI_TRANSFER_TIMEOUT << 2));
 404
 405         if (tport == NULL)
 406                 return -ENODEV;
 407
 408         dev = port->serial->dev;
 409         tdev = tport->tp_tdev;
 410
 411         /* only one open on any port on a device at a time */
 412         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 413                 return -ERESTARTSYS;
 414
 415         port_number = port->port_number;
 416
 417         tport->tp_msr = 0;
 418         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 419
 420         /* start interrupt urb the first time a port is opened on this device */
 421         if (tdev->td_open_port_count == 0) {
 422                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
 423                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 424                 if (!urb) {
 425                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
 426                         status = -EINVAL;
 427                         goto release_lock;
 428                 }
 429                 urb->context = tdev;
 430                 status = usb_submit_urb(urb, GFP_KERNEL);
 431                 if (status) {
 432                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
 433                         goto release_lock;
 434                 }
 435         }
 436
 437         if (tty)
 438                 ti_set_termios(tty, port, &tty->termios);
 439
 440         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
 441         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 442                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 443         if (status) {
 444                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 445                         __func__, status);
 446                 goto unlink_int_urb;
 447         }
 448
 449         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
 450         status = ti_command_out_sync(tdev, TI_START_PORT,
 451                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 452         if (status) {
 453                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 454                                                         __func__, status);
 455                 goto unlink_int_urb;
 456         }
 457
 458         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
 459         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 460                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 461         if (status) {
 462                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 463                                                         __func__, status);
 464                 goto unlink_int_urb;
 465         }
 466         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 467                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 468         if (status) {
 469                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 470                                                         __func__, status);
 471                 goto unlink_int_urb;
 472         }
 473
 474         /* reset the data toggle on the bulk endpoints to work around bug in
 475          * host controllers where things get out of sync some times */
 476         usb_clear_halt(dev, port->write_urb->pipe);
 477         usb_clear_halt(dev, port->read_urb->pipe);
 478
 479         if (tty)
 480                 ti_set_termios(tty, port, &tty->termios);
 481
 482         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
 483         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 484                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 485         if (status) {
 486                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 487                                                         __func__, status);
 488                 goto unlink_int_urb;
 489         }
 490
 491         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
 492         status = ti_command_out_sync(tdev, TI_START_PORT,
 493                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 494         if (status) {
 495                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 496                                                         __func__, status);
 497                 goto unlink_int_urb;
 498         }
 499
 500         /* start read urb */
 501         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
 502         urb = port->read_urb;
 503         if (!urb) {
 504                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 505                 status = -EINVAL;
 506                 goto unlink_int_urb;
 507         }
 508         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 509         urb->context = tport;
 510         status = usb_submit_urb(urb, GFP_KERNEL);
 511         if (status) {
 512                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 513                                                         __func__, status);
 514                 goto unlink_int_urb;
 515         }
 516
 517         tport->tp_is_open = 1;
 518         ++tdev->td_open_port_count;
 519
 520         goto release_lock;
 521
 522 unlink_int_urb:
 523         if (tdev->td_open_port_count == 0)
 524                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 525 release_lock:
 526         mutex_unlock(&tdev->td_open_close_lock);
 527         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
 528         return status;
 529 }
 530
 531
 532 static void ti_close(struct usb_serial_port *port)
 533 {
 534         struct ti_device *tdev;
 535         struct ti_port *tport;
 536         int port_number;
 537         int status;
 538         int do_unlock;
 539         unsigned long flags;
 540
 541         tdev = usb_get_serial_data(port->serial);
 542         tport = usb_get_serial_port_data(port);
 543         if (tdev == NULL || tport == NULL)
 544                 return;
 545
 546         tport->tp_is_open = 0;
 547
 548         usb_kill_urb(port->read_urb);
 549         usb_kill_urb(port->write_urb);
 550         tport->tp_write_urb_in_use = 0;
 551         spin_lock_irqsave(&tport->tp_lock, flags);
 552         kfifo_reset_out(&port->write_fifo);
 553         spin_unlock_irqrestore(&tport->tp_lock, flags);
 554
 555         port_number = port->port_number;
 556
 557         dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
 558         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 559                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 560         if (status)
 561                 dev_err(&port->dev,
 562                         "%s - cannot send close port command, %d\n"
 563                                                         , __func__, status);
 564
 565         /* if mutex_lock is interrupted, continue anyway */
 566         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 567         --tport->tp_tdev->td_open_port_count;
 568         if (tport->tp_tdev->td_open_port_count <= 0) {
 569                 /* last port is closed, shut down interrupt urb */
 570                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 571                 tport->tp_tdev->td_open_port_count = 0;
 572         }
 573         if (do_unlock)
 574                 mutex_unlock(&tdev->td_open_close_lock);
 575 }
 576
 577
 578 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 579                         const unsigned char *data, int count)
 580 {
 581         struct ti_port *tport = usb_get_serial_port_data(port);
 582
 583         if (count == 0) {
 584                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
 585                 return 0;
 586         }
 587
 588         if (tport == NULL || !tport->tp_is_open)
 589                 return -ENODEV;
 590
 591         count = kfifo_in_locked(&port->write_fifo, data, count,
 592                                                         &tport->tp_lock);
 593         ti_send(tport);
 594
 595         return count;
 596 }
 597
 598
 599 static int ti_write_room(struct tty_struct *tty)
 600 {
 601         struct usb_serial_port *port = tty->driver_data;
 602         struct ti_port *tport = usb_get_serial_port_data(port);
 603         int room = 0;
 604         unsigned long flags;
 605
 606         if (tport == NULL)
 607                 return 0;
 608
 609         spin_lock_irqsave(&tport->tp_lock, flags);
 610         room = kfifo_avail(&port->write_fifo);
 611         spin_unlock_irqrestore(&tport->tp_lock, flags);
 612
 613         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
 614         return room;
 615 }
 616
 617
 618 static int ti_chars_in_buffer(struct tty_struct *tty)
 619 {
 620         struct usb_serial_port *port = tty->driver_data;
 621         struct ti_port *tport = usb_get_serial_port_data(port);
 622         int chars = 0;
 623         unsigned long flags;
 624
 625         if (tport == NULL)
 626                 return 0;
 627
 628         spin_lock_irqsave(&tport->tp_lock, flags);
 629         chars = kfifo_len(&port->write_fifo);
 630         spin_unlock_irqrestore(&tport->tp_lock, flags);
 631
 632         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
 633         return chars;
 634 }
 635
 636 static bool ti_tx_empty(struct usb_serial_port *port)
 637 {
 638         struct ti_port *tport = usb_get_serial_port_data(port);
 639         int ret;
 640         u8 lsr;
 641
 642         ret = ti_get_lsr(tport, &lsr);
 643         if (!ret && !(lsr & TI_LSR_TX_EMPTY))
 644                 return false;
 645
 646         return true;
 647 }
 648
 649 static void ti_throttle(struct tty_struct *tty)
 650 {
 651         struct usb_serial_port *port = tty->driver_data;
 652         struct ti_port *tport = usb_get_serial_port_data(port);
 653
 654         if (tport == NULL)
 655                 return;
 656
 657         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 658                 ti_stop_read(tport, tty);
 659
 660 }
 661
 662
 663 static void ti_unthrottle(struct tty_struct *tty)
 664 {
 665         struct usb_serial_port *port = tty->driver_data;
 666         struct ti_port *tport = usb_get_serial_port_data(port);
 667         int status;
 668
 669         if (tport == NULL)
 670                 return;
 671
 672         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 673                 status = ti_restart_read(tport, tty);
 674                 if (status)
 675                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 676                                                         __func__, status);
 677         }
 678 }
 679
 680 static int ti_ioctl(struct tty_struct *tty,
 681         unsigned int cmd, unsigned long arg)
 682 {
 683         struct usb_serial_port *port = tty->driver_data;
 684         struct ti_port *tport = usb_get_serial_port_data(port);
 685
 686         dev_dbg(&port->dev, "%s - cmd = 0x%04X\n", __func__, cmd);
 687
 688         if (tport == NULL)
 689                 return -ENODEV;
 690
 691         switch (cmd) {
 692         case TIOCGSERIAL:
 693                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
 694                 return ti_get_serial_info(tport,
 695                                 (struct serial_struct __user *)arg);
 696         case TIOCSSERIAL:
 697                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
 698                 return ti_set_serial_info(tty, tport,
 699                                 (struct serial_struct __user *)arg);
 700         }
 701         return -ENOIOCTLCMD;
 702 }
 703
 704
 705 static void ti_set_termios(struct tty_struct *tty,
 706                 struct usb_serial_port *port, struct ktermios *old_termios)
 707 {
 708         struct ti_port *tport = usb_get_serial_port_data(port);
 709         struct ti_uart_config *config;
 710         tcflag_t cflag, iflag;
 711         int baud;
 712         int status;
 713         int port_number = port->port_number;
 714         unsigned int mcr;
 715
 716         cflag = tty->termios.c_cflag;
 717         iflag = tty->termios.c_iflag;
 718
 719         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
 720         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
 721                 old_termios->c_cflag, old_termios->c_iflag);
 722
 723         if (tport == NULL)
 724                 return;
 725
 726         config = kmalloc(sizeof(*config), GFP_KERNEL);
 727         if (!config) {
 728                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 729                 return;
 730         }
 731
 732         config->wFlags = 0;
 733
 734         /* these flags must be set */
 735         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 736         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 737         config->bUartMode = (__u8)(tport->tp_uart_mode);
 738
 739         switch (cflag & CSIZE) {
 740         case CS5:
 741                     config->bDataBits = TI_UART_5_DATA_BITS;
 742                     break;
 743         case CS6:
 744                     config->bDataBits = TI_UART_6_DATA_BITS;
 745                     break;
 746         case CS7:
 747                     config->bDataBits = TI_UART_7_DATA_BITS;
 748                     break;
 749         default:
 750         case CS8:
 751                     config->bDataBits = TI_UART_8_DATA_BITS;
 752                     break;
 753         }
 754
 755         /* CMSPAR isn't supported by this driver */
 756         tty->termios.c_cflag &= ~CMSPAR;
 757
 758         if (cflag & PARENB) {
 759                 if (cflag & PARODD) {
 760                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 761                         config->bParity = TI_UART_ODD_PARITY;
 762                 } else {
 763                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 764                         config->bParity = TI_UART_EVEN_PARITY;
 765                 }
 766         } else {
 767                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 768                 config->bParity = TI_UART_NO_PARITY;
 769         }
 770
 771         if (cflag & CSTOPB)
 772                 config->bStopBits = TI_UART_2_STOP_BITS;
 773         else
 774                 config->bStopBits = TI_UART_1_STOP_BITS;
 775
 776         if (cflag & CRTSCTS) {
 777                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 778                 if ((cflag & CBAUD) != B0)
 779                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 780                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 781         } else {
 782                 tty->hw_stopped = 0;
 783                 ti_restart_read(tport, tty);
 784         }
 785
 786         if (I_IXOFF(tty) || I_IXON(tty)) {
 787                 config->cXon  = START_CHAR(tty);
 788                 config->cXoff = STOP_CHAR(tty);
 789
 790                 if (I_IXOFF(tty))
 791                         config->wFlags |= TI_UART_ENABLE_X_IN;
 792                 else
 793                         ti_restart_read(tport, tty);
 794
 795                 if (I_IXON(tty))
 796                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 797         }
 798
 799         baud = tty_get_baud_rate(tty);
 800         if (!baud)
 801                 baud = 9600;
 802         if (tport->tp_tdev->td_is_3410)
 803                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 804         else
 805                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 806
 807         /* FIXME: Should calculate resulting baud here and report it back */
 808         if ((cflag & CBAUD) != B0)
 809                 tty_encode_baud_rate(tty, baud, baud);
 810
 811         dev_dbg(&port->dev,
 812                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 813                 __func__, baud, config->wBaudRate, config->wFlags,
 814                 config->bDataBits, config->bParity, config->bStopBits,
 815                 config->cXon, config->cXoff, config->bUartMode);
 816
 817         cpu_to_be16s(&config->wBaudRate);
 818         cpu_to_be16s(&config->wFlags);
 819
 820         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 821                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 822                 sizeof(*config));
 823         if (status)
 824                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 825                                         __func__, port_number, status);
 826
 827         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 828         mcr = tport->tp_shadow_mcr;
 829         /* if baud rate is B0, clear RTS and DTR */
 830         if ((cflag & CBAUD) == B0)
 831                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 832         status = ti_set_mcr(tport, mcr);
 833         if (status)
 834                 dev_err(&port->dev,
 835                         "%s - cannot set modem control on port %d, %d\n",
 836                                                 __func__, port_number, status);
 837
 838         kfree(config);
 839 }
 840
 841
 842 static int ti_tiocmget(struct tty_struct *tty)
 843 {
 844         struct usb_serial_port *port = tty->driver_data;
 845         struct ti_port *tport = usb_get_serial_port_data(port);
 846         unsigned int result;
 847         unsigned int msr;
 848         unsigned int mcr;
 849         unsigned long flags;
 850
 851         if (tport == NULL)
 852                 return -ENODEV;
 853
 854         spin_lock_irqsave(&tport->tp_lock, flags);
 855         msr = tport->tp_msr;
 856         mcr = tport->tp_shadow_mcr;
 857         spin_unlock_irqrestore(&tport->tp_lock, flags);
 858
 859         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
 860                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
 861                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
 862                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
 863                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
 864                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
 865                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
 866
 867         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
 868
 869         return result;
 870 }
 871
 872
 873 static int ti_tiocmset(struct tty_struct *tty,
 874                                 unsigned int set, unsigned int clear)
 875 {
 876         struct usb_serial_port *port = tty->driver_data;
 877         struct ti_port *tport = usb_get_serial_port_data(port);
 878         unsigned int mcr;
 879         unsigned long flags;
 880
 881         if (tport == NULL)
 882                 return -ENODEV;
 883
 884         spin_lock_irqsave(&tport->tp_lock, flags);
 885         mcr = tport->tp_shadow_mcr;
 886
 887         if (set & TIOCM_RTS)
 888                 mcr |= TI_MCR_RTS;
 889         if (set & TIOCM_DTR)
 890                 mcr |= TI_MCR_DTR;
 891         if (set & TIOCM_LOOP)
 892                 mcr |= TI_MCR_LOOP;
 893
 894         if (clear & TIOCM_RTS)
 895                 mcr &= ~TI_MCR_RTS;
 896         if (clear & TIOCM_DTR)
 897                 mcr &= ~TI_MCR_DTR;
 898         if (clear & TIOCM_LOOP)
 899                 mcr &= ~TI_MCR_LOOP;
 900         spin_unlock_irqrestore(&tport->tp_lock, flags);
 901
 902         return ti_set_mcr(tport, mcr);
 903 }
 904
 905
 906 static void ti_break(struct tty_struct *tty, int break_state)
 907 {
 908         struct usb_serial_port *port = tty->driver_data;
 909         struct ti_port *tport = usb_get_serial_port_data(port);
 910         int status;
 911
 912         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
 913
 914         if (tport == NULL)
 915                 return;
 916
 917         status = ti_write_byte(port, tport->tp_tdev,
 918                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
 919                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
 920
 921         if (status)
 922                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
 923 }
 924
 925
 926 static void ti_interrupt_callback(struct urb *urb)
 927 {
 928         struct ti_device *tdev = urb->context;
 929         struct usb_serial_port *port;
 930         struct usb_serial *serial = tdev->td_serial;
 931         struct ti_port *tport;
 932         struct device *dev = &urb->dev->dev;
 933         unsigned char *data = urb->transfer_buffer;
 934         int length = urb->actual_length;
 935         int port_number;
 936         int function;
 937         int status = urb->status;
 938         int retval;
 939         __u8 msr;
 940
 941         switch (status) {
 942         case 0:
 943                 break;
 944         case -ECONNRESET:
 945         case -ENOENT:
 946         case -ESHUTDOWN:
 947                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
 948                 tdev->td_urb_error = 1;
 949                 return;
 950         default:
 951                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
 952                 tdev->td_urb_error = 1;
 953                 goto exit;
 954         }
 955
 956         if (length != 2) {
 957                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
 958                 goto exit;
 959         }
 960
 961         if (data[0] == TI_CODE_HARDWARE_ERROR) {
 962                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
 963                 goto exit;
 964         }
 965
 966         port_number = TI_GET_PORT_FROM_CODE(data[0]);
 967         function = TI_GET_FUNC_FROM_CODE(data[0]);
 968
 969         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
 970                 __func__, port_number, function, data[1]);
 971
 972         if (port_number >= serial->num_ports) {
 973                 dev_err(dev, "%s - bad port number, %d\n",
 974                                                 __func__, port_number);
 975                 goto exit;
 976         }
 977
 978         port = serial->port[port_number];
 979
 980         tport = usb_get_serial_port_data(port);
 981         if (!tport)
 982                 goto exit;
 983
 984         switch (function) {
 985         case TI_CODE_DATA_ERROR:
 986                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
 987                         __func__, port_number, data[1]);
 988                 break;
 989
 990         case TI_CODE_MODEM_STATUS:
 991                 msr = data[1];
 992                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
 993                 ti_handle_new_msr(tport, msr);
 994                 break;
 995
 996         default:
 997                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
 998                                                         __func__, data[1]);
 999                 break;
1000         }
1001
1002 exit:
1003         retval = usb_submit_urb(urb, GFP_ATOMIC);
1004         if (retval)
1005                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1006                         __func__, retval);
1007 }
1008
1009
1010 static void ti_bulk_in_callback(struct urb *urb)
1011 {
1012         struct ti_port *tport = urb->context;
1013         struct usb_serial_port *port = tport->tp_port;
1014         struct device *dev = &urb->dev->dev;
1015         int status = urb->status;
1016         int retval = 0;
1017
1018         switch (status) {
1019         case 0:
1020                 break;
1021         case -ECONNRESET:
1022         case -ENOENT:
1023         case -ESHUTDOWN:
1024                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1025                 tport->tp_tdev->td_urb_error = 1;
1026                 return;
1027         default:
1028                 dev_err(dev, "%s - nonzero urb status, %d\n",
1029                         __func__, status);
1030                 tport->tp_tdev->td_urb_error = 1;
1031         }
1032
1033         if (status == -EPIPE)
1034                 goto exit;
1035
1036         if (status) {
1037                 dev_err(dev, "%s - stopping read!\n", __func__);
1038                 return;
1039         }
1040
1041         if (urb->actual_length) {
1042                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1043                                       urb->transfer_buffer);
1044
1045                 if (!tport->tp_is_open)
1046                         dev_dbg(dev, "%s - port closed, dropping data\n",
1047                                 __func__);
1048                 else
1049                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1050                 spin_lock(&tport->tp_lock);
1051                 port->icount.rx += urb->actual_length;
1052                 spin_unlock(&tport->tp_lock);
1053         }
1054
1055 exit:
1056         /* continue to read unless stopping */
1057         spin_lock(&tport->tp_lock);
1058         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1059                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1060         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1061                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1062
1063         spin_unlock(&tport->tp_lock);
1064         if (retval)
1065                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1066                         __func__, retval);
1067 }
1068
1069
1070 static void ti_bulk_out_callback(struct urb *urb)
1071 {
1072         struct ti_port *tport = urb->context;
1073         struct usb_serial_port *port = tport->tp_port;
1074         int status = urb->status;
1075
1076         tport->tp_write_urb_in_use = 0;
1077
1078         switch (status) {
1079         case 0:
1080                 break;
1081         case -ECONNRESET:
1082         case -ENOENT:
1083         case -ESHUTDOWN:
1084                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1085                 tport->tp_tdev->td_urb_error = 1;
1086                 return;
1087         default:
1088                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1089                         __func__, status);
1090                 tport->tp_tdev->td_urb_error = 1;
1091         }
1092
1093         /* send any buffered data */
1094         ti_send(tport);
1095 }
1096
1097
1098 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1099                 int length)
1100 {
1101         int cnt;
1102
1103         do {
1104                 cnt = tty_insert_flip_string(&port->port, data, length);
1105                 if (cnt < length) {
1106                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1107                                                 __func__, length - cnt);
1108                         if (cnt == 0)
1109                                 break;
1110                 }
1111                 tty_flip_buffer_push(&port->port);
1112                 data += cnt;
1113                 length -= cnt;
1114         } while (length > 0);
1115 }
1116
1117
1118 static void ti_send(struct ti_port *tport)
1119 {
1120         int count, result;
1121         struct usb_serial_port *port = tport->tp_port;
1122         unsigned long flags;
1123
1124         spin_lock_irqsave(&tport->tp_lock, flags);
1125
1126         if (tport->tp_write_urb_in_use)
1127                 goto unlock;
1128
1129         count = kfifo_out(&port->write_fifo,
1130                                 port->write_urb->transfer_buffer,
1131                                 port->bulk_out_size);
1132
1133         if (count == 0)
1134                 goto unlock;
1135
1136         tport->tp_write_urb_in_use = 1;
1137
1138         spin_unlock_irqrestore(&tport->tp_lock, flags);
1139
1140         usb_serial_debug_data(&port->dev, __func__, count,
1141                               port->write_urb->transfer_buffer);
1142
1143         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1144                            usb_sndbulkpipe(port->serial->dev,
1145                                             port->bulk_out_endpointAddress),
1146                            port->write_urb->transfer_buffer, count,
1147                            ti_bulk_out_callback, tport);
1148
1149         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1150         if (result) {
1151                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1152                                                         __func__, result);
1153                 tport->tp_write_urb_in_use = 0;
1154                 /* TODO: reschedule ti_send */
1155         } else {
1156                 spin_lock_irqsave(&tport->tp_lock, flags);
1157                 port->icount.tx += count;
1158                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1159         }
1160
1161         /* more room in the buffer for new writes, wakeup */
1162         tty_port_tty_wakeup(&port->port);
1163
1164         return;
1165 unlock:
1166         spin_unlock_irqrestore(&tport->tp_lock, flags);
1167         return;
1168 }
1169
1170
1171 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1172 {
1173         unsigned long flags;
1174         int status;
1175
1176         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1177                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1178                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1179
1180         spin_lock_irqsave(&tport->tp_lock, flags);
1181         if (!status)
1182                 tport->tp_shadow_mcr = mcr;
1183         spin_unlock_irqrestore(&tport->tp_lock, flags);
1184
1185         return status;
1186 }
1187
1188
1189 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1190 {
1191         int size, status;
1192         struct ti_device *tdev = tport->tp_tdev;
1193         struct usb_serial_port *port = tport->tp_port;
1194         int port_number = port->port_number;
1195         struct ti_port_status *data;
1196
1197         size = sizeof(struct ti_port_status);
1198         data = kmalloc(size, GFP_KERNEL);
1199         if (!data) {
1200                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1201                 return -ENOMEM;
1202         }
1203
1204         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1205                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1206         if (status) {
1207                 dev_err(&port->dev,
1208                         "%s - get port status command failed, %d\n",
1209                                                         __func__, status);
1210                 goto free_data;
1211         }
1212
1213         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1214
1215         *lsr = data->bLSR;
1216
1217 free_data:
1218         kfree(data);
1219         return status;
1220 }
1221
1222
1223 static int ti_get_serial_info(struct ti_port *tport,
1224         struct serial_struct __user *ret_arg)
1225 {
1226         struct usb_serial_port *port = tport->tp_port;
1227         struct serial_struct ret_serial;
1228         unsigned cwait;
1229
1230         if (!ret_arg)
1231                 return -EFAULT;
1232
1233         cwait = port->port.closing_wait;
1234         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1235                 cwait = jiffies_to_msecs(cwait) / 10;
1236
1237         memset(&ret_serial, 0, sizeof(ret_serial));
1238
1239         ret_serial.type = PORT_16550A;
1240         ret_serial.line = port->minor;
1241         ret_serial.port = port->port_number;
1242         ret_serial.flags = tport->tp_flags;
1243         ret_serial.xmit_fifo_size = kfifo_size(&port->write_fifo);
1244         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1245         ret_serial.closing_wait = cwait;
1246
1247         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1248                 return -EFAULT;
1249
1250         return 0;
1251 }
1252
1253
1254 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1255         struct serial_struct __user *new_arg)
1256 {
1257         struct serial_struct new_serial;
1258         unsigned cwait;
1259
1260         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1261                 return -EFAULT;
1262
1263         cwait = new_serial.closing_wait;
1264         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1265                 cwait = msecs_to_jiffies(10 * new_serial.closing_wait);
1266
1267         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1268         tport->tp_port->port.closing_wait = cwait;
1269
1270         return 0;
1271 }
1272
1273
1274 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1275 {
1276         struct async_icount *icount;
1277         struct tty_struct *tty;
1278         unsigned long flags;
1279
1280         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1281
1282         if (msr & TI_MSR_DELTA_MASK) {
1283                 spin_lock_irqsave(&tport->tp_lock, flags);
1284                 icount = &tport->tp_port->icount;
1285                 if (msr & TI_MSR_DELTA_CTS)
1286                         icount->cts++;
1287                 if (msr & TI_MSR_DELTA_DSR)
1288                         icount->dsr++;
1289                 if (msr & TI_MSR_DELTA_CD)
1290                         icount->dcd++;
1291                 if (msr & TI_MSR_DELTA_RI)
1292                         icount->rng++;
1293                 wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
1294                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1295         }
1296
1297         tport->tp_msr = msr & TI_MSR_MASK;
1298
1299         /* handle CTS flow control */
1300         tty = tty_port_tty_get(&tport->tp_port->port);
1301         if (tty && C_CRTSCTS(tty)) {
1302                 if (msr & TI_MSR_CTS) {
1303                         tty->hw_stopped = 0;
1304                         tty_wakeup(tty);
1305                 } else {
1306                         tty->hw_stopped = 1;
1307                 }
1308         }
1309         tty_kref_put(tty);
1310 }
1311
1312
1313 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1314 {
1315         unsigned long flags;
1316
1317         spin_lock_irqsave(&tport->tp_lock, flags);
1318
1319         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1320                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1321
1322         spin_unlock_irqrestore(&tport->tp_lock, flags);
1323 }
1324
1325
1326 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1327 {
1328         struct urb *urb;
1329         int status = 0;
1330         unsigned long flags;
1331
1332         spin_lock_irqsave(&tport->tp_lock, flags);
1333
1334         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1335                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1336                 urb = tport->tp_port->read_urb;
1337                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1338                 urb->context = tport;
1339                 status = usb_submit_urb(urb, GFP_KERNEL);
1340         } else  {
1341                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1342                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1343         }
1344
1345         return status;
1346 }
1347
1348
1349 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1350         __u16 moduleid, __u16 value, __u8 *data, int size)
1351 {
1352         int status;
1353
1354         status = usb_control_msg(tdev->td_serial->dev,
1355                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1356                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1357                 value, moduleid, data, size, 1000);
1358
1359         if (status == size)
1360                 status = 0;
1361
1362         if (status > 0)
1363                 status = -ECOMM;
1364
1365         return status;
1366 }
1367
1368
1369 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1370         __u16 moduleid, __u16 value, __u8 *data, int size)
1371 {
1372         int status;
1373
1374         status = usb_control_msg(tdev->td_serial->dev,
1375                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1376                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1377                 value, moduleid, data, size, 1000);
1378
1379         if (status == size)
1380                 status = 0;
1381
1382         if (status > 0)
1383                 status = -ECOMM;
1384
1385         return status;
1386 }
1387
1388
1389 static int ti_write_byte(struct usb_serial_port *port,
1390                         struct ti_device *tdev, unsigned long addr,
1391                         __u8 mask, __u8 byte)
1392 {
1393         int status;
1394         unsigned int size;
1395         struct ti_write_data_bytes *data;
1396
1397         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1398                 addr, mask, byte);
1399
1400         size = sizeof(struct ti_write_data_bytes) + 2;
1401         data = kmalloc(size, GFP_KERNEL);
1402         if (!data) {
1403                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1404                 return -ENOMEM;
1405         }
1406
1407         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1408         data->bDataType = TI_RW_DATA_BYTE;
1409         data->bDataCounter = 1;
1410         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1411         data->wBaseAddrLo = cpu_to_be16(addr);
1412         data->bData[0] = mask;
1413         data->bData[1] = byte;
1414
1415         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1416                 (__u8 *)data, size);
1417
1418         if (status < 0)
1419                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1420
1421         kfree(data);
1422
1423         return status;
1424 }
1425
1426 static int ti_do_download(struct usb_device *dev, int pipe,
1427                                                 u8 *buffer, int size)
1428 {
1429         int pos;
1430         u8 cs = 0;
1431         int done;
1432         struct ti_firmware_header *header;
1433         int status = 0;
1434         int len;
1435
1436         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1437                 cs = (__u8)(cs + buffer[pos]);
1438
1439         header = (struct ti_firmware_header *)buffer;
1440         header->wLength = cpu_to_le16((__u16)(size
1441                                         - sizeof(struct ti_firmware_header)));
1442         header->bCheckSum = cs;
1443
1444         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1445         for (pos = 0; pos < size; pos += done) {
1446                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1447                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1448                                                                 &done, 1000);
1449                 if (status)
1450                         break;
1451         }
1452         return status;
1453 }
1454
1455 static int ti_download_firmware(struct ti_device *tdev)
1456 {
1457         int status;
1458         int buffer_size;
1459         __u8 *buffer;
1460         struct usb_device *dev = tdev->td_serial->dev;
1461         unsigned int pipe = usb_sndbulkpipe(dev,
1462                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1463         const struct firmware *fw_p;
1464         char buf[32];
1465
1466         /* try ID specific firmware first, then try generic firmware */
1467         sprintf(buf, "ti_usb-v%04x-p%04x.fw",
1468                         le16_to_cpu(dev->descriptor.idVendor),
1469                         le16_to_cpu(dev->descriptor.idProduct));
1470         status = request_firmware(&fw_p, buf, &dev->dev);
1471
1472         if (status != 0) {
1473                 buf[0] = '\0';
1474                 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
1475                         switch (le16_to_cpu(dev->descriptor.idProduct)) {
1476                         case MTS_CDMA_PRODUCT_ID:
1477                                 strcpy(buf, "mts_cdma.fw");
1478                                 break;
1479                         case MTS_GSM_PRODUCT_ID:
1480                                 strcpy(buf, "mts_gsm.fw");
1481                                 break;
1482                         case MTS_EDGE_PRODUCT_ID:
1483                                 strcpy(buf, "mts_edge.fw");
1484                                 break;
1485                         case MTS_MT9234MU_PRODUCT_ID:
1486                                 strcpy(buf, "mts_mt9234mu.fw");
1487                                 break;
1488                         case MTS_MT9234ZBA_PRODUCT_ID:
1489                                 strcpy(buf, "mts_mt9234zba.fw");
1490                                 break;
1491                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1492                                 strcpy(buf, "mts_mt9234zba.fw");
1493                                 break;                  }
1494                 }
1495                 if (buf[0] == '\0') {
1496                         if (tdev->td_is_3410)
1497                                 strcpy(buf, "ti_3410.fw");
1498                         else
1499                                 strcpy(buf, "ti_5052.fw");
1500                 }
1501                 status = request_firmware(&fw_p, buf, &dev->dev);
1502         }
1503         if (status) {
1504                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1505                 return -ENOENT;
1506         }
1507         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1508                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1509                 release_firmware(fw_p);
1510                 return -ENOENT;
1511         }
1512
1513         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1514         buffer = kmalloc(buffer_size, GFP_KERNEL);
1515         if (buffer) {
1516                 memcpy(buffer, fw_p->data, fw_p->size);
1517                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1518                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1519                 kfree(buffer);
1520         } else {
1521                 dev_dbg(&dev->dev, "%s ENOMEM\n", __func__);
1522                 status = -ENOMEM;
1523         }
1524         release_firmware(fw_p);
1525         if (status) {
1526                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1527                                                         __func__, status);
1528                 return status;
1529         }
1530
1531         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1532
1533         return 0;
1534 }