kernel/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         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
 163         { }     /* terminator */
 164 };
 165
 166 static const struct usb_device_id ti_id_table_5052[] = {
 167         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 168         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 169         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 170         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 171         { }     /* terminator */
 172 };
 173
 174 static const struct usb_device_id ti_id_table_combined[] = {
 175         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 176         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 177         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 178         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 179         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 180         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 181         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 182         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 183         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 184         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 185         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 186         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 187         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 188         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 189         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 190         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 191         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 192         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 193         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
 194         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 195         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
 196         { }     /* terminator */
 197 };
 198
 199 static struct usb_serial_driver ti_1port_device = {
 200         .driver = {
 201                 .owner          = THIS_MODULE,
 202                 .name           = "ti_usb_3410_5052_1",
 203         },
 204         .description            = "TI USB 3410 1 port adapter",
 205         .id_table               = ti_id_table_3410,
 206         .num_ports              = 1,
 207         .attach                 = ti_startup,
 208         .release                = ti_release,
 209         .port_probe             = ti_port_probe,
 210         .port_remove            = ti_port_remove,
 211         .open                   = ti_open,
 212         .close                  = ti_close,
 213         .write                  = ti_write,
 214         .write_room             = ti_write_room,
 215         .chars_in_buffer        = ti_chars_in_buffer,
 216         .tx_empty               = ti_tx_empty,
 217         .throttle               = ti_throttle,
 218         .unthrottle             = ti_unthrottle,
 219         .ioctl                  = ti_ioctl,
 220         .set_termios            = ti_set_termios,
 221         .tiocmget               = ti_tiocmget,
 222         .tiocmset               = ti_tiocmset,
 223         .tiocmiwait             = usb_serial_generic_tiocmiwait,
 224         .get_icount             = usb_serial_generic_get_icount,
 225         .break_ctl              = ti_break,
 226         .read_int_callback      = ti_interrupt_callback,
 227         .read_bulk_callback     = ti_bulk_in_callback,
 228         .write_bulk_callback    = ti_bulk_out_callback,
 229 };
 230
 231 static struct usb_serial_driver ti_2port_device = {
 232         .driver = {
 233                 .owner          = THIS_MODULE,
 234                 .name           = "ti_usb_3410_5052_2",
 235         },
 236         .description            = "TI USB 5052 2 port adapter",
 237         .id_table               = ti_id_table_5052,
 238         .num_ports              = 2,
 239         .attach                 = ti_startup,
 240         .release                = ti_release,
 241         .port_probe             = ti_port_probe,
 242         .port_remove            = ti_port_remove,
 243         .open                   = ti_open,
 244         .close                  = ti_close,
 245         .write                  = ti_write,
 246         .write_room             = ti_write_room,
 247         .chars_in_buffer        = ti_chars_in_buffer,
 248         .tx_empty               = ti_tx_empty,
 249         .throttle               = ti_throttle,
 250         .unthrottle             = ti_unthrottle,
 251         .ioctl                  = ti_ioctl,
 252         .set_termios            = ti_set_termios,
 253         .tiocmget               = ti_tiocmget,
 254         .tiocmset               = ti_tiocmset,
 255         .tiocmiwait             = usb_serial_generic_tiocmiwait,
 256         .get_icount             = usb_serial_generic_get_icount,
 257         .break_ctl              = ti_break,
 258         .read_int_callback      = ti_interrupt_callback,
 259         .read_bulk_callback     = ti_bulk_in_callback,
 260         .write_bulk_callback    = ti_bulk_out_callback,
 261 };
 262
 263 static struct usb_serial_driver * const serial_drivers[] = {
 264         &ti_1port_device, &ti_2port_device, NULL
 265 };
 266
 267 /* Module */
 268
 269 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 270 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 271 MODULE_LICENSE("GPL");
 272
 273 MODULE_FIRMWARE("ti_3410.fw");
 274 MODULE_FIRMWARE("ti_5052.fw");
 275 MODULE_FIRMWARE("mts_cdma.fw");
 276 MODULE_FIRMWARE("mts_gsm.fw");
 277 MODULE_FIRMWARE("mts_edge.fw");
 278 MODULE_FIRMWARE("mts_mt9234mu.fw");
 279 MODULE_FIRMWARE("mts_mt9234zba.fw");
 280
 281 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 282 MODULE_PARM_DESC(closing_wait,
 283     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 284
 285 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 286
 287 module_usb_serial_driver(serial_drivers, ti_id_table_combined);
 288
 289 /* Functions */
 290
 291 static int ti_startup(struct usb_serial *serial)
 292 {
 293         struct ti_device *tdev;
 294         struct usb_device *dev = serial->dev;
 295         int status;
 296
 297         dev_dbg(&dev->dev,
 298                 "%s - product 0x%4X, num configurations %d, configuration value %d\n",
 299                 __func__, le16_to_cpu(dev->descriptor.idProduct),
 300                 dev->descriptor.bNumConfigurations,
 301                 dev->actconfig->desc.bConfigurationValue);
 302
 303         /* create device structure */
 304         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 305         if (!tdev)
 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         if (serial->num_bulk_in < serial->num_ports ||
 343                         serial->num_bulk_out < serial->num_ports) {
 344                 dev_err(&serial->interface->dev, "missing endpoints\n");
 345                 status = -ENODEV;
 346                 goto free_tdev;
 347         }
 348
 349         return 0;
 350
 351 free_tdev:
 352         kfree(tdev);
 353         usb_set_serial_data(serial, NULL);
 354         return status;
 355 }
 356
 357
 358 static void ti_release(struct usb_serial *serial)
 359 {
 360         struct ti_device *tdev = usb_get_serial_data(serial);
 361
 362         kfree(tdev);
 363 }
 364
 365 static int ti_port_probe(struct usb_serial_port *port)
 366 {
 367         struct ti_port *tport;
 368
 369         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
 370         if (!tport)
 371                 return -ENOMEM;
 372
 373         spin_lock_init(&tport->tp_lock);
 374         if (port == port->serial->port[0])
 375                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
 376         else
 377                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
 378         port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
 379         tport->tp_port = port;
 380         tport->tp_tdev = usb_get_serial_data(port->serial);
 381         tport->tp_uart_mode = 0;        /* default is RS232 */
 382
 383         usb_set_serial_port_data(port, tport);
 384
 385         port->port.drain_delay = 3;
 386
 387         return 0;
 388 }
 389
 390 static int ti_port_remove(struct usb_serial_port *port)
 391 {
 392         struct ti_port *tport;
 393
 394         tport = usb_get_serial_port_data(port);
 395         kfree(tport);
 396
 397         return 0;
 398 }
 399
 400 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 401 {
 402         struct ti_port *tport = usb_get_serial_port_data(port);
 403         struct ti_device *tdev;
 404         struct usb_device *dev;
 405         struct urb *urb;
 406         int port_number;
 407         int status;
 408         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 409                              TI_PIPE_TIMEOUT_ENABLE |
 410                              (TI_TRANSFER_TIMEOUT << 2));
 411
 412         if (tport == NULL)
 413                 return -ENODEV;
 414
 415         dev = port->serial->dev;
 416         tdev = tport->tp_tdev;
 417
 418         /* only one open on any port on a device at a time */
 419         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 420                 return -ERESTARTSYS;
 421
 422         port_number = port->port_number;
 423
 424         tport->tp_msr = 0;
 425         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 426
 427         /* start interrupt urb the first time a port is opened on this device */
 428         if (tdev->td_open_port_count == 0) {
 429                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
 430                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 431                 if (!urb) {
 432                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
 433                         status = -EINVAL;
 434                         goto release_lock;
 435                 }
 436                 urb->context = tdev;
 437                 status = usb_submit_urb(urb, GFP_KERNEL);
 438                 if (status) {
 439                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
 440                         goto release_lock;
 441                 }
 442         }
 443
 444         if (tty)
 445                 ti_set_termios(tty, port, &tty->termios);
 446
 447         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
 448         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 449                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 450         if (status) {
 451                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 452                         __func__, status);
 453                 goto unlink_int_urb;
 454         }
 455
 456         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
 457         status = ti_command_out_sync(tdev, TI_START_PORT,
 458                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 459         if (status) {
 460                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 461                                                         __func__, status);
 462                 goto unlink_int_urb;
 463         }
 464
 465         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
 466         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 467                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 468         if (status) {
 469                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 470                                                         __func__, status);
 471                 goto unlink_int_urb;
 472         }
 473         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 474                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 475         if (status) {
 476                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 477                                                         __func__, status);
 478                 goto unlink_int_urb;
 479         }
 480
 481         /* reset the data toggle on the bulk endpoints to work around bug in
 482          * host controllers where things get out of sync some times */
 483         usb_clear_halt(dev, port->write_urb->pipe);
 484         usb_clear_halt(dev, port->read_urb->pipe);
 485
 486         if (tty)
 487                 ti_set_termios(tty, port, &tty->termios);
 488
 489         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
 490         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 491                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 492         if (status) {
 493                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 494                                                         __func__, status);
 495                 goto unlink_int_urb;
 496         }
 497
 498         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
 499         status = ti_command_out_sync(tdev, TI_START_PORT,
 500                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 501         if (status) {
 502                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 503                                                         __func__, status);
 504                 goto unlink_int_urb;
 505         }
 506
 507         /* start read urb */
 508         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
 509         urb = port->read_urb;
 510         if (!urb) {
 511                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 512                 status = -EINVAL;
 513                 goto unlink_int_urb;
 514         }
 515         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 516         urb->context = tport;
 517         status = usb_submit_urb(urb, GFP_KERNEL);
 518         if (status) {
 519                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 520                                                         __func__, status);
 521                 goto unlink_int_urb;
 522         }
 523
 524         tport->tp_is_open = 1;
 525         ++tdev->td_open_port_count;
 526
 527         goto release_lock;
 528
 529 unlink_int_urb:
 530         if (tdev->td_open_port_count == 0)
 531                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 532 release_lock:
 533         mutex_unlock(&tdev->td_open_close_lock);
 534         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
 535         return status;
 536 }
 537
 538
 539 static void ti_close(struct usb_serial_port *port)
 540 {
 541         struct ti_device *tdev;
 542         struct ti_port *tport;
 543         int port_number;
 544         int status;
 545         int do_unlock;
 546         unsigned long flags;
 547
 548         tdev = usb_get_serial_data(port->serial);
 549         tport = usb_get_serial_port_data(port);
 550         if (tdev == NULL || tport == NULL)
 551                 return;
 552
 553         tport->tp_is_open = 0;
 554
 555         usb_kill_urb(port->read_urb);
 556         usb_kill_urb(port->write_urb);
 557         tport->tp_write_urb_in_use = 0;
 558         spin_lock_irqsave(&tport->tp_lock, flags);
 559         kfifo_reset_out(&port->write_fifo);
 560         spin_unlock_irqrestore(&tport->tp_lock, flags);
 561
 562         port_number = port->port_number;
 563
 564         dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
 565         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 566                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 567         if (status)
 568                 dev_err(&port->dev,
 569                         "%s - cannot send close port command, %d\n"
 570                                                         , __func__, status);
 571
 572         /* if mutex_lock is interrupted, continue anyway */
 573         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 574         --tport->tp_tdev->td_open_port_count;
 575         if (tport->tp_tdev->td_open_port_count <= 0) {
 576                 /* last port is closed, shut down interrupt urb */
 577                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 578                 tport->tp_tdev->td_open_port_count = 0;
 579         }
 580         if (do_unlock)
 581                 mutex_unlock(&tdev->td_open_close_lock);
 582 }
 583
 584
 585 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 586                         const unsigned char *data, int count)
 587 {
 588         struct ti_port *tport = usb_get_serial_port_data(port);
 589
 590         if (count == 0) {
 591                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
 592                 return 0;
 593         }
 594
 595         if (tport == NULL || !tport->tp_is_open)
 596                 return -ENODEV;
 597
 598         count = kfifo_in_locked(&port->write_fifo, data, count,
 599                                                         &tport->tp_lock);
 600         ti_send(tport);
 601
 602         return count;
 603 }
 604
 605
 606 static int ti_write_room(struct tty_struct *tty)
 607 {
 608         struct usb_serial_port *port = tty->driver_data;
 609         struct ti_port *tport = usb_get_serial_port_data(port);
 610         int room = 0;
 611         unsigned long flags;
 612
 613         if (tport == NULL)
 614                 return 0;
 615
 616         spin_lock_irqsave(&tport->tp_lock, flags);
 617         room = kfifo_avail(&port->write_fifo);
 618         spin_unlock_irqrestore(&tport->tp_lock, flags);
 619
 620         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
 621         return room;
 622 }
 623
 624
 625 static int ti_chars_in_buffer(struct tty_struct *tty)
 626 {
 627         struct usb_serial_port *port = tty->driver_data;
 628         struct ti_port *tport = usb_get_serial_port_data(port);
 629         int chars = 0;
 630         unsigned long flags;
 631
 632         if (tport == NULL)
 633                 return 0;
 634
 635         spin_lock_irqsave(&tport->tp_lock, flags);
 636         chars = kfifo_len(&port->write_fifo);
 637         spin_unlock_irqrestore(&tport->tp_lock, flags);
 638
 639         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
 640         return chars;
 641 }
 642
 643 static bool ti_tx_empty(struct usb_serial_port *port)
 644 {
 645         struct ti_port *tport = usb_get_serial_port_data(port);
 646         int ret;
 647         u8 lsr;
 648
 649         ret = ti_get_lsr(tport, &lsr);
 650         if (!ret && !(lsr & TI_LSR_TX_EMPTY))
 651                 return false;
 652
 653         return true;
 654 }
 655
 656 static void ti_throttle(struct tty_struct *tty)
 657 {
 658         struct usb_serial_port *port = tty->driver_data;
 659         struct ti_port *tport = usb_get_serial_port_data(port);
 660
 661         if (tport == NULL)
 662                 return;
 663
 664         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 665                 ti_stop_read(tport, tty);
 666
 667 }
 668
 669
 670 static void ti_unthrottle(struct tty_struct *tty)
 671 {
 672         struct usb_serial_port *port = tty->driver_data;
 673         struct ti_port *tport = usb_get_serial_port_data(port);
 674         int status;
 675
 676         if (tport == NULL)
 677                 return;
 678
 679         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 680                 status = ti_restart_read(tport, tty);
 681                 if (status)
 682                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 683                                                         __func__, status);
 684         }
 685 }
 686
 687 static int ti_ioctl(struct tty_struct *tty,
 688         unsigned int cmd, unsigned long arg)
 689 {
 690         struct usb_serial_port *port = tty->driver_data;
 691         struct ti_port *tport = usb_get_serial_port_data(port);
 692
 693         if (tport == NULL)
 694                 return -ENODEV;
 695
 696         switch (cmd) {
 697         case TIOCGSERIAL:
 698                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
 699                 return ti_get_serial_info(tport,
 700                                 (struct serial_struct __user *)arg);
 701         case TIOCSSERIAL:
 702                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
 703                 return ti_set_serial_info(tty, tport,
 704                                 (struct serial_struct __user *)arg);
 705         }
 706         return -ENOIOCTLCMD;
 707 }
 708
 709
 710 static void ti_set_termios(struct tty_struct *tty,
 711                 struct usb_serial_port *port, struct ktermios *old_termios)
 712 {
 713         struct ti_port *tport = usb_get_serial_port_data(port);
 714         struct ti_uart_config *config;
 715         tcflag_t cflag, iflag;
 716         int baud;
 717         int status;
 718         int port_number = port->port_number;
 719         unsigned int mcr;
 720
 721         cflag = tty->termios.c_cflag;
 722         iflag = tty->termios.c_iflag;
 723
 724         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
 725         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
 726                 old_termios->c_cflag, old_termios->c_iflag);
 727
 728         if (tport == NULL)
 729                 return;
 730
 731         config = kmalloc(sizeof(*config), GFP_KERNEL);
 732         if (!config)
 733                 return;
 734
 735         config->wFlags = 0;
 736
 737         /* these flags must be set */
 738         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 739         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 740         config->bUartMode = (__u8)(tport->tp_uart_mode);
 741
 742         switch (cflag & CSIZE) {
 743         case CS5:
 744                     config->bDataBits = TI_UART_5_DATA_BITS;
 745                     break;
 746         case CS6:
 747                     config->bDataBits = TI_UART_6_DATA_BITS;
 748                     break;
 749         case CS7:
 750                     config->bDataBits = TI_UART_7_DATA_BITS;
 751                     break;
 752         default:
 753         case CS8:
 754                     config->bDataBits = TI_UART_8_DATA_BITS;
 755                     break;
 756         }
 757
 758         /* CMSPAR isn't supported by this driver */
 759         tty->termios.c_cflag &= ~CMSPAR;
 760
 761         if (cflag & PARENB) {
 762                 if (cflag & PARODD) {
 763                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 764                         config->bParity = TI_UART_ODD_PARITY;
 765                 } else {
 766                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 767                         config->bParity = TI_UART_EVEN_PARITY;
 768                 }
 769         } else {
 770                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 771                 config->bParity = TI_UART_NO_PARITY;
 772         }
 773
 774         if (cflag & CSTOPB)
 775                 config->bStopBits = TI_UART_2_STOP_BITS;
 776         else
 777                 config->bStopBits = TI_UART_1_STOP_BITS;
 778
 779         if (cflag & CRTSCTS) {
 780                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 781                 if ((cflag & CBAUD) != B0)
 782                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 783                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 784         } else {
 785                 ti_restart_read(tport, tty);
 786         }
 787
 788         if (I_IXOFF(tty) || I_IXON(tty)) {
 789                 config->cXon  = START_CHAR(tty);
 790                 config->cXoff = STOP_CHAR(tty);
 791
 792                 if (I_IXOFF(tty))
 793                         config->wFlags |= TI_UART_ENABLE_X_IN;
 794                 else
 795                         ti_restart_read(tport, tty);
 796
 797                 if (I_IXON(tty))
 798                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 799         }
 800
 801         baud = tty_get_baud_rate(tty);
 802         if (!baud)
 803                 baud = 9600;
 804         if (tport->tp_tdev->td_is_3410)
 805                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 806         else
 807                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 808
 809         /* FIXME: Should calculate resulting baud here and report it back */
 810         if ((cflag & CBAUD) != B0)
 811                 tty_encode_baud_rate(tty, baud, baud);
 812
 813         dev_dbg(&port->dev,
 814                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d\n",
 815                 __func__, baud, config->wBaudRate, config->wFlags,
 816                 config->bDataBits, config->bParity, config->bStopBits,
 817                 config->cXon, config->cXoff, config->bUartMode);
 818
 819         cpu_to_be16s(&config->wBaudRate);
 820         cpu_to_be16s(&config->wFlags);
 821
 822         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 823                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 824                 sizeof(*config));
 825         if (status)
 826                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 827                                         __func__, port_number, status);
 828
 829         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 830         mcr = tport->tp_shadow_mcr;
 831         /* if baud rate is B0, clear RTS and DTR */
 832         if ((cflag & CBAUD) == B0)
 833                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 834         status = ti_set_mcr(tport, mcr);
 835         if (status)
 836                 dev_err(&port->dev,
 837                         "%s - cannot set modem control on port %d, %d\n",
 838                                                 __func__, port_number, status);
 839
 840         kfree(config);
 841 }
 842
 843
 844 static int ti_tiocmget(struct tty_struct *tty)
 845 {
 846         struct usb_serial_port *port = tty->driver_data;
 847         struct ti_port *tport = usb_get_serial_port_data(port);
 848         unsigned int result;
 849         unsigned int msr;
 850         unsigned int mcr;
 851         unsigned long flags;
 852
 853         if (tport == NULL)
 854                 return -ENODEV;
 855
 856         spin_lock_irqsave(&tport->tp_lock, flags);
 857         msr = tport->tp_msr;
 858         mcr = tport->tp_shadow_mcr;
 859         spin_unlock_irqrestore(&tport->tp_lock, flags);
 860
 861         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
 862                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
 863                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
 864                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
 865                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
 866                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
 867                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
 868
 869         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
 870
 871         return result;
 872 }
 873
 874
 875 static int ti_tiocmset(struct tty_struct *tty,
 876                                 unsigned int set, unsigned int clear)
 877 {
 878         struct usb_serial_port *port = tty->driver_data;
 879         struct ti_port *tport = usb_get_serial_port_data(port);
 880         unsigned int mcr;
 881         unsigned long flags;
 882
 883         if (tport == NULL)
 884                 return -ENODEV;
 885
 886         spin_lock_irqsave(&tport->tp_lock, flags);
 887         mcr = tport->tp_shadow_mcr;
 888
 889         if (set & TIOCM_RTS)
 890                 mcr |= TI_MCR_RTS;
 891         if (set & TIOCM_DTR)
 892                 mcr |= TI_MCR_DTR;
 893         if (set & TIOCM_LOOP)
 894                 mcr |= TI_MCR_LOOP;
 895
 896         if (clear & TIOCM_RTS)
 897                 mcr &= ~TI_MCR_RTS;
 898         if (clear & TIOCM_DTR)
 899                 mcr &= ~TI_MCR_DTR;
 900         if (clear & TIOCM_LOOP)
 901                 mcr &= ~TI_MCR_LOOP;
 902         spin_unlock_irqrestore(&tport->tp_lock, flags);
 903
 904         return ti_set_mcr(tport, mcr);
 905 }
 906
 907
 908 static void ti_break(struct tty_struct *tty, int break_state)
 909 {
 910         struct usb_serial_port *port = tty->driver_data;
 911         struct ti_port *tport = usb_get_serial_port_data(port);
 912         int status;
 913
 914         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
 915
 916         if (tport == NULL)
 917                 return;
 918
 919         status = ti_write_byte(port, tport->tp_tdev,
 920                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
 921                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
 922
 923         if (status)
 924                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
 925 }
 926
 927
 928 static void ti_interrupt_callback(struct urb *urb)
 929 {
 930         struct ti_device *tdev = urb->context;
 931         struct usb_serial_port *port;
 932         struct usb_serial *serial = tdev->td_serial;
 933         struct ti_port *tport;
 934         struct device *dev = &urb->dev->dev;
 935         unsigned char *data = urb->transfer_buffer;
 936         int length = urb->actual_length;
 937         int port_number;
 938         int function;
 939         int status = urb->status;
 940         int retval;
 941         __u8 msr;
 942
 943         switch (status) {
 944         case 0:
 945                 break;
 946         case -ECONNRESET:
 947         case -ENOENT:
 948         case -ESHUTDOWN:
 949                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
 950                 tdev->td_urb_error = 1;
 951                 return;
 952         default:
 953                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
 954                 tdev->td_urb_error = 1;
 955                 goto exit;
 956         }
 957
 958         if (length != 2) {
 959                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
 960                 goto exit;
 961         }
 962
 963         if (data[0] == TI_CODE_HARDWARE_ERROR) {
 964                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
 965                 goto exit;
 966         }
 967
 968         port_number = TI_GET_PORT_FROM_CODE(data[0]);
 969         function = TI_GET_FUNC_FROM_CODE(data[0]);
 970
 971         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
 972                 __func__, port_number, function, data[1]);
 973
 974         if (port_number >= serial->num_ports) {
 975                 dev_err(dev, "%s - bad port number, %d\n",
 976                                                 __func__, port_number);
 977                 goto exit;
 978         }
 979
 980         port = serial->port[port_number];
 981
 982         tport = usb_get_serial_port_data(port);
 983         if (!tport)
 984                 goto exit;
 985
 986         switch (function) {
 987         case TI_CODE_DATA_ERROR:
 988                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
 989                         __func__, port_number, data[1]);
 990                 break;
 991
 992         case TI_CODE_MODEM_STATUS:
 993                 msr = data[1];
 994                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
 995                 ti_handle_new_msr(tport, msr);
 996                 break;
 997
 998         default:
 999                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1000                                                         __func__, data[1]);
1001                 break;
1002         }
1003
1004 exit:
1005         retval = usb_submit_urb(urb, GFP_ATOMIC);
1006         if (retval)
1007                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1008                         __func__, retval);
1009 }
1010
1011
1012 static void ti_bulk_in_callback(struct urb *urb)
1013 {
1014         struct ti_port *tport = urb->context;
1015         struct usb_serial_port *port = tport->tp_port;
1016         struct device *dev = &urb->dev->dev;
1017         int status = urb->status;
1018         int retval = 0;
1019
1020         switch (status) {
1021         case 0:
1022                 break;
1023         case -ECONNRESET:
1024         case -ENOENT:
1025         case -ESHUTDOWN:
1026                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1027                 tport->tp_tdev->td_urb_error = 1;
1028                 return;
1029         default:
1030                 dev_err(dev, "%s - nonzero urb status, %d\n",
1031                         __func__, status);
1032                 tport->tp_tdev->td_urb_error = 1;
1033         }
1034
1035         if (status == -EPIPE)
1036                 goto exit;
1037
1038         if (status) {
1039                 dev_err(dev, "%s - stopping read!\n", __func__);
1040                 return;
1041         }
1042
1043         if (urb->actual_length) {
1044                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1045                                       urb->transfer_buffer);
1046
1047                 if (!tport->tp_is_open)
1048                         dev_dbg(dev, "%s - port closed, dropping data\n",
1049                                 __func__);
1050                 else
1051                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1052                 spin_lock(&tport->tp_lock);
1053                 port->icount.rx += urb->actual_length;
1054                 spin_unlock(&tport->tp_lock);
1055         }
1056
1057 exit:
1058         /* continue to read unless stopping */
1059         spin_lock(&tport->tp_lock);
1060         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1061                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1062         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1063                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1064
1065         spin_unlock(&tport->tp_lock);
1066         if (retval)
1067                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1068                         __func__, retval);
1069 }
1070
1071
1072 static void ti_bulk_out_callback(struct urb *urb)
1073 {
1074         struct ti_port *tport = urb->context;
1075         struct usb_serial_port *port = tport->tp_port;
1076         int status = urb->status;
1077
1078         tport->tp_write_urb_in_use = 0;
1079
1080         switch (status) {
1081         case 0:
1082                 break;
1083         case -ECONNRESET:
1084         case -ENOENT:
1085         case -ESHUTDOWN:
1086                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1087                 tport->tp_tdev->td_urb_error = 1;
1088                 return;
1089         default:
1090                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1091                         __func__, status);
1092                 tport->tp_tdev->td_urb_error = 1;
1093         }
1094
1095         /* send any buffered data */
1096         ti_send(tport);
1097 }
1098
1099
1100 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1101                 int length)
1102 {
1103         int cnt;
1104
1105         do {
1106                 cnt = tty_insert_flip_string(&port->port, data, length);
1107                 if (cnt < length) {
1108                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1109                                                 __func__, length - cnt);
1110                         if (cnt == 0)
1111                                 break;
1112                 }
1113                 tty_flip_buffer_push(&port->port);
1114                 data += cnt;
1115                 length -= cnt;
1116         } while (length > 0);
1117 }
1118
1119
1120 static void ti_send(struct ti_port *tport)
1121 {
1122         int count, result;
1123         struct usb_serial_port *port = tport->tp_port;
1124         unsigned long flags;
1125
1126         spin_lock_irqsave(&tport->tp_lock, flags);
1127
1128         if (tport->tp_write_urb_in_use)
1129                 goto unlock;
1130
1131         count = kfifo_out(&port->write_fifo,
1132                                 port->write_urb->transfer_buffer,
1133                                 port->bulk_out_size);
1134
1135         if (count == 0)
1136                 goto unlock;
1137
1138         tport->tp_write_urb_in_use = 1;
1139
1140         spin_unlock_irqrestore(&tport->tp_lock, flags);
1141
1142         usb_serial_debug_data(&port->dev, __func__, count,
1143                               port->write_urb->transfer_buffer);
1144
1145         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1146                            usb_sndbulkpipe(port->serial->dev,
1147                                             port->bulk_out_endpointAddress),
1148                            port->write_urb->transfer_buffer, count,
1149                            ti_bulk_out_callback, tport);
1150
1151         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1152         if (result) {
1153                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1154                                                         __func__, result);
1155                 tport->tp_write_urb_in_use = 0;
1156                 /* TODO: reschedule ti_send */
1157         } else {
1158                 spin_lock_irqsave(&tport->tp_lock, flags);
1159                 port->icount.tx += count;
1160                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1161         }
1162
1163         /* more room in the buffer for new writes, wakeup */
1164         tty_port_tty_wakeup(&port->port);
1165
1166         return;
1167 unlock:
1168         spin_unlock_irqrestore(&tport->tp_lock, flags);
1169         return;
1170 }
1171
1172
1173 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1174 {
1175         unsigned long flags;
1176         int status;
1177
1178         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1179                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1180                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1181
1182         spin_lock_irqsave(&tport->tp_lock, flags);
1183         if (!status)
1184                 tport->tp_shadow_mcr = mcr;
1185         spin_unlock_irqrestore(&tport->tp_lock, flags);
1186
1187         return status;
1188 }
1189
1190
1191 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1192 {
1193         int size, status;
1194         struct ti_device *tdev = tport->tp_tdev;
1195         struct usb_serial_port *port = tport->tp_port;
1196         int port_number = port->port_number;
1197         struct ti_port_status *data;
1198
1199         size = sizeof(struct ti_port_status);
1200         data = kmalloc(size, GFP_KERNEL);
1201         if (!data)
1202                 return -ENOMEM;
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_wakeup(tty);
1304         }
1305         tty_kref_put(tty);
1306 }
1307
1308
1309 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1310 {
1311         unsigned long flags;
1312
1313         spin_lock_irqsave(&tport->tp_lock, flags);
1314
1315         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1316                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1317
1318         spin_unlock_irqrestore(&tport->tp_lock, flags);
1319 }
1320
1321
1322 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1323 {
1324         struct urb *urb;
1325         int status = 0;
1326         unsigned long flags;
1327
1328         spin_lock_irqsave(&tport->tp_lock, flags);
1329
1330         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1331                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1332                 urb = tport->tp_port->read_urb;
1333                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1334                 urb->context = tport;
1335                 status = usb_submit_urb(urb, GFP_KERNEL);
1336         } else  {
1337                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1338                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1339         }
1340
1341         return status;
1342 }
1343
1344
1345 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1346         __u16 moduleid, __u16 value, __u8 *data, int size)
1347 {
1348         int status;
1349
1350         status = usb_control_msg(tdev->td_serial->dev,
1351                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1352                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1353                 value, moduleid, data, size, 1000);
1354
1355         if (status == size)
1356                 status = 0;
1357
1358         if (status > 0)
1359                 status = -ECOMM;
1360
1361         return status;
1362 }
1363
1364
1365 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1366         __u16 moduleid, __u16 value, __u8 *data, int size)
1367 {
1368         int status;
1369
1370         status = usb_control_msg(tdev->td_serial->dev,
1371                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1372                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1373                 value, moduleid, data, size, 1000);
1374
1375         if (status == size)
1376                 status = 0;
1377
1378         if (status > 0)
1379                 status = -ECOMM;
1380
1381         return status;
1382 }
1383
1384
1385 static int ti_write_byte(struct usb_serial_port *port,
1386                         struct ti_device *tdev, unsigned long addr,
1387                         __u8 mask, __u8 byte)
1388 {
1389         int status;
1390         unsigned int size;
1391         struct ti_write_data_bytes *data;
1392
1393         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1394                 addr, mask, byte);
1395
1396         size = sizeof(struct ti_write_data_bytes) + 2;
1397         data = kmalloc(size, GFP_KERNEL);
1398         if (!data)
1399                 return -ENOMEM;
1400
1401         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1402         data->bDataType = TI_RW_DATA_BYTE;
1403         data->bDataCounter = 1;
1404         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1405         data->wBaseAddrLo = cpu_to_be16(addr);
1406         data->bData[0] = mask;
1407         data->bData[1] = byte;
1408
1409         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1410                 (__u8 *)data, size);
1411
1412         if (status < 0)
1413                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1414
1415         kfree(data);
1416
1417         return status;
1418 }
1419
1420 static int ti_do_download(struct usb_device *dev, int pipe,
1421                                                 u8 *buffer, int size)
1422 {
1423         int pos;
1424         u8 cs = 0;
1425         int done;
1426         struct ti_firmware_header *header;
1427         int status = 0;
1428         int len;
1429
1430         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1431                 cs = (__u8)(cs + buffer[pos]);
1432
1433         header = (struct ti_firmware_header *)buffer;
1434         header->wLength = cpu_to_le16((__u16)(size
1435                                         - sizeof(struct ti_firmware_header)));
1436         header->bCheckSum = cs;
1437
1438         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1439         for (pos = 0; pos < size; pos += done) {
1440                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1441                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1442                                                                 &done, 1000);
1443                 if (status)
1444                         break;
1445         }
1446         return status;
1447 }
1448
1449 static int ti_download_firmware(struct ti_device *tdev)
1450 {
1451         int status;
1452         int buffer_size;
1453         __u8 *buffer;
1454         struct usb_device *dev = tdev->td_serial->dev;
1455         unsigned int pipe = usb_sndbulkpipe(dev,
1456                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1457         const struct firmware *fw_p;
1458         char buf[32];
1459
1460         /* try ID specific firmware first, then try generic firmware */
1461         sprintf(buf, "ti_usb-v%04x-p%04x.fw",
1462                         le16_to_cpu(dev->descriptor.idVendor),
1463                         le16_to_cpu(dev->descriptor.idProduct));
1464         status = request_firmware(&fw_p, buf, &dev->dev);
1465
1466         if (status != 0) {
1467                 buf[0] = '\0';
1468                 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
1469                         switch (le16_to_cpu(dev->descriptor.idProduct)) {
1470                         case MTS_CDMA_PRODUCT_ID:
1471                                 strcpy(buf, "mts_cdma.fw");
1472                                 break;
1473                         case MTS_GSM_PRODUCT_ID:
1474                                 strcpy(buf, "mts_gsm.fw");
1475                                 break;
1476                         case MTS_EDGE_PRODUCT_ID:
1477                                 strcpy(buf, "mts_edge.fw");
1478                                 break;
1479                         case MTS_MT9234MU_PRODUCT_ID:
1480                                 strcpy(buf, "mts_mt9234mu.fw");
1481                                 break;
1482                         case MTS_MT9234ZBA_PRODUCT_ID:
1483                                 strcpy(buf, "mts_mt9234zba.fw");
1484                                 break;
1485                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1486                                 strcpy(buf, "mts_mt9234zba.fw");
1487                                 break;                  }
1488                 }
1489                 if (buf[0] == '\0') {
1490                         if (tdev->td_is_3410)
1491                                 strcpy(buf, "ti_3410.fw");
1492                         else
1493                                 strcpy(buf, "ti_5052.fw");
1494                 }
1495                 status = request_firmware(&fw_p, buf, &dev->dev);
1496         }
1497         if (status) {
1498                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1499                 return -ENOENT;
1500         }
1501         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1502                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1503                 release_firmware(fw_p);
1504                 return -ENOENT;
1505         }
1506
1507         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1508         buffer = kmalloc(buffer_size, GFP_KERNEL);
1509         if (buffer) {
1510                 memcpy(buffer, fw_p->data, fw_p->size);
1511                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1512                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1513                 kfree(buffer);
1514         } else {
1515                 status = -ENOMEM;
1516         }
1517         release_firmware(fw_p);
1518         if (status) {
1519                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1520                                                         __func__, status);
1521                 return status;
1522         }
1523
1524         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1525
1526         return 0;
1527 }