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