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         bool                    td_rs485_only;
  84         int                     td_urb_error;
  85 };
  86
  87
  88 /* Function Declarations */
  89
  90 static int ti_startup(struct usb_serial *serial);
  91 static void ti_release(struct usb_serial *serial);
  92 static int ti_port_probe(struct usb_serial_port *port);
  93 static int ti_port_remove(struct usb_serial_port *port);
  94 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
  95 static void ti_close(struct usb_serial_port *port);
  96 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
  97                 const unsigned char *data, int count);
  98 static int ti_write_room(struct tty_struct *tty);
  99 static int ti_chars_in_buffer(struct tty_struct *tty);
 100 static bool ti_tx_empty(struct usb_serial_port *port);
 101 static void ti_throttle(struct tty_struct *tty);
 102 static void ti_unthrottle(struct tty_struct *tty);
 103 static int ti_ioctl(struct tty_struct *tty,
 104                 unsigned int cmd, unsigned long arg);
 105 static void ti_set_termios(struct tty_struct *tty,
 106                 struct usb_serial_port *port, struct ktermios *old_termios);
 107 static int ti_tiocmget(struct tty_struct *tty);
 108 static int ti_tiocmset(struct tty_struct *tty,
 109                 unsigned int set, unsigned int clear);
 110 static void ti_break(struct tty_struct *tty, int break_state);
 111 static void ti_interrupt_callback(struct urb *urb);
 112 static void ti_bulk_in_callback(struct urb *urb);
 113 static void ti_bulk_out_callback(struct urb *urb);
 114
 115 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
 116                 int length);
 117 static void ti_send(struct ti_port *tport);
 118 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 119 static int ti_get_lsr(struct ti_port *tport, u8 *lsr);
 120 static int ti_get_serial_info(struct ti_port *tport,
 121         struct serial_struct __user *ret_arg);
 122 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 123         struct serial_struct __user *new_arg);
 124 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 125
 126 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 127 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 128
 129 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 130         __u16 moduleid, __u16 value, __u8 *data, int size);
 131 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 132         __u16 moduleid, __u16 value, __u8 *data, int size);
 133
 134 static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev,
 135                          unsigned long addr, __u8 mask, __u8 byte);
 136
 137 static int ti_download_firmware(struct ti_device *tdev);
 138
 139
 140 /* Data */
 141
 142 /* module parameters */
 143 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 144
 145 /* supported devices */
 146 static const struct usb_device_id ti_id_table_3410[] = {
 147         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 148         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 149         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 150         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 151         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 152         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 153         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 154         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 155         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 156         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 157         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 158         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 159         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 160         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STEREO_PLUG_ID) },
 161         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
 162         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 163         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
 164         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1110_PRODUCT_ID) },
 165         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1130_PRODUCT_ID) },
 166         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1131_PRODUCT_ID) },
 167         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1150_PRODUCT_ID) },
 168         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1151_PRODUCT_ID) },
 169         { }     /* terminator */
 170 };
 171
 172 static const struct usb_device_id ti_id_table_5052[] = {
 173         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 174         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 175         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 176         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 177         { }     /* terminator */
 178 };
 179
 180 static const struct usb_device_id ti_id_table_combined[] = {
 181         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 182         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 183         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 184         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 185         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 186         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 187         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 188         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 189         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 190         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 191         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 192         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 193         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 194         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 195         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 196         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 197         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 198         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 199         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
 200         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 201         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
 202         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1110_PRODUCT_ID) },
 203         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1130_PRODUCT_ID) },
 204         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1131_PRODUCT_ID) },
 205         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1150_PRODUCT_ID) },
 206         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1151_PRODUCT_ID) },
 207         { }     /* terminator */
 208 };
 209
 210 static struct usb_serial_driver ti_1port_device = {
 211         .driver = {
 212                 .owner          = THIS_MODULE,
 213                 .name           = "ti_usb_3410_5052_1",
 214         },
 215         .description            = "TI USB 3410 1 port adapter",
 216         .id_table               = ti_id_table_3410,
 217         .num_ports              = 1,
 218         .attach                 = ti_startup,
 219         .release                = ti_release,
 220         .port_probe             = ti_port_probe,
 221         .port_remove            = ti_port_remove,
 222         .open                   = ti_open,
 223         .close                  = ti_close,
 224         .write                  = ti_write,
 225         .write_room             = ti_write_room,
 226         .chars_in_buffer        = ti_chars_in_buffer,
 227         .tx_empty               = ti_tx_empty,
 228         .throttle               = ti_throttle,
 229         .unthrottle             = ti_unthrottle,
 230         .ioctl                  = ti_ioctl,
 231         .set_termios            = ti_set_termios,
 232         .tiocmget               = ti_tiocmget,
 233         .tiocmset               = ti_tiocmset,
 234         .tiocmiwait             = usb_serial_generic_tiocmiwait,
 235         .get_icount             = usb_serial_generic_get_icount,
 236         .break_ctl              = ti_break,
 237         .read_int_callback      = ti_interrupt_callback,
 238         .read_bulk_callback     = ti_bulk_in_callback,
 239         .write_bulk_callback    = ti_bulk_out_callback,
 240 };
 241
 242 static struct usb_serial_driver ti_2port_device = {
 243         .driver = {
 244                 .owner          = THIS_MODULE,
 245                 .name           = "ti_usb_3410_5052_2",
 246         },
 247         .description            = "TI USB 5052 2 port adapter",
 248         .id_table               = ti_id_table_5052,
 249         .num_ports              = 2,
 250         .attach                 = ti_startup,
 251         .release                = ti_release,
 252         .port_probe             = ti_port_probe,
 253         .port_remove            = ti_port_remove,
 254         .open                   = ti_open,
 255         .close                  = ti_close,
 256         .write                  = ti_write,
 257         .write_room             = ti_write_room,
 258         .chars_in_buffer        = ti_chars_in_buffer,
 259         .tx_empty               = ti_tx_empty,
 260         .throttle               = ti_throttle,
 261         .unthrottle             = ti_unthrottle,
 262         .ioctl                  = ti_ioctl,
 263         .set_termios            = ti_set_termios,
 264         .tiocmget               = ti_tiocmget,
 265         .tiocmset               = ti_tiocmset,
 266         .tiocmiwait             = usb_serial_generic_tiocmiwait,
 267         .get_icount             = usb_serial_generic_get_icount,
 268         .break_ctl              = ti_break,
 269         .read_int_callback      = ti_interrupt_callback,
 270         .read_bulk_callback     = ti_bulk_in_callback,
 271         .write_bulk_callback    = ti_bulk_out_callback,
 272 };
 273
 274 static struct usb_serial_driver * const serial_drivers[] = {
 275         &ti_1port_device, &ti_2port_device, NULL
 276 };
 277
 278 /* Module */
 279
 280 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 281 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 282 MODULE_LICENSE("GPL");
 283
 284 MODULE_FIRMWARE("ti_3410.fw");
 285 MODULE_FIRMWARE("ti_5052.fw");
 286 MODULE_FIRMWARE("mts_cdma.fw");
 287 MODULE_FIRMWARE("mts_gsm.fw");
 288 MODULE_FIRMWARE("mts_edge.fw");
 289 MODULE_FIRMWARE("mts_mt9234mu.fw");
 290 MODULE_FIRMWARE("mts_mt9234zba.fw");
 291 MODULE_FIRMWARE("moxa/moxa-1110.fw");
 292 MODULE_FIRMWARE("moxa/moxa-1130.fw");
 293 MODULE_FIRMWARE("moxa/moxa-1131.fw");
 294 MODULE_FIRMWARE("moxa/moxa-1150.fw");
 295 MODULE_FIRMWARE("moxa/moxa-1151.fw");
 296
 297 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 298 MODULE_PARM_DESC(closing_wait,
 299     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 300
 301 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 302
 303 module_usb_serial_driver(serial_drivers, ti_id_table_combined);
 304
 305 /* Functions */
 306
 307 static int ti_startup(struct usb_serial *serial)
 308 {
 309         struct ti_device *tdev;
 310         struct usb_device *dev = serial->dev;
 311         struct usb_host_interface *cur_altsetting;
 312         int num_endpoints;
 313         u16 vid, pid;
 314         int status;
 315
 316         dev_dbg(&dev->dev,
 317                 "%s - product 0x%4X, num configurations %d, configuration value %d\n",
 318                 __func__, le16_to_cpu(dev->descriptor.idProduct),
 319                 dev->descriptor.bNumConfigurations,
 320                 dev->actconfig->desc.bConfigurationValue);
 321
 322         /* create device structure */
 323         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 324         if (!tdev)
 325                 return -ENOMEM;
 326
 327         mutex_init(&tdev->td_open_close_lock);
 328         tdev->td_serial = serial;
 329         usb_set_serial_data(serial, tdev);
 330
 331         /* determine device type */
 332         if (serial->type == &ti_1port_device)
 333                 tdev->td_is_3410 = 1;
 334         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
 335                 tdev->td_is_3410 ? "3410" : "5052");
 336
 337         vid = le16_to_cpu(dev->descriptor.idVendor);
 338         pid = le16_to_cpu(dev->descriptor.idProduct);
 339         if (vid == MXU1_VENDOR_ID) {
 340                 switch (pid) {
 341                 case MXU1_1130_PRODUCT_ID:
 342                 case MXU1_1131_PRODUCT_ID:
 343                         tdev->td_rs485_only = true;
 344                         break;
 345                 }
 346         }
 347
 348         cur_altsetting = serial->interface->cur_altsetting;
 349         num_endpoints = cur_altsetting->desc.bNumEndpoints;
 350
 351         /* if we have only 1 configuration and 1 endpoint, download firmware */
 352         if (dev->descriptor.bNumConfigurations == 1 && num_endpoints == 1) {
 353                 status = ti_download_firmware(tdev);
 354
 355                 if (status != 0)
 356                         goto free_tdev;
 357
 358                 /* 3410 must be reset, 5052 resets itself */
 359                 if (tdev->td_is_3410) {
 360                         msleep_interruptible(100);
 361                         usb_reset_device(dev);
 362                 }
 363
 364                 status = -ENODEV;
 365                 goto free_tdev;
 366         }
 367
 368         /* the second configuration must be set */
 369         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 370                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 371                 status = status ? status : -ENODEV;
 372                 goto free_tdev;
 373         }
 374
 375         return 0;
 376
 377 free_tdev:
 378         kfree(tdev);
 379         usb_set_serial_data(serial, NULL);
 380         return status;
 381 }
 382
 383
 384 static void ti_release(struct usb_serial *serial)
 385 {
 386         struct ti_device *tdev = usb_get_serial_data(serial);
 387
 388         kfree(tdev);
 389 }
 390
 391 static int ti_port_probe(struct usb_serial_port *port)
 392 {
 393         struct ti_port *tport;
 394
 395         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
 396         if (!tport)
 397                 return -ENOMEM;
 398
 399         spin_lock_init(&tport->tp_lock);
 400         if (port == port->serial->port[0])
 401                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
 402         else
 403                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
 404         port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
 405         tport->tp_port = port;
 406         tport->tp_tdev = usb_get_serial_data(port->serial);
 407
 408         if (tport->tp_tdev->td_rs485_only)
 409                 tport->tp_uart_mode = TI_UART_485_RECEIVER_DISABLED;
 410         else
 411                 tport->tp_uart_mode = TI_UART_232;
 412
 413         usb_set_serial_port_data(port, tport);
 414
 415         port->port.drain_delay = 3;
 416
 417         return 0;
 418 }
 419
 420 static int ti_port_remove(struct usb_serial_port *port)
 421 {
 422         struct ti_port *tport;
 423
 424         tport = usb_get_serial_port_data(port);
 425         kfree(tport);
 426
 427         return 0;
 428 }
 429
 430 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 431 {
 432         struct ti_port *tport = usb_get_serial_port_data(port);
 433         struct ti_device *tdev;
 434         struct usb_device *dev;
 435         struct urb *urb;
 436         int port_number;
 437         int status;
 438         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 439                              TI_PIPE_TIMEOUT_ENABLE |
 440                              (TI_TRANSFER_TIMEOUT << 2));
 441
 442         if (tport == NULL)
 443                 return -ENODEV;
 444
 445         dev = port->serial->dev;
 446         tdev = tport->tp_tdev;
 447
 448         /* only one open on any port on a device at a time */
 449         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 450                 return -ERESTARTSYS;
 451
 452         port_number = port->port_number;
 453
 454         tport->tp_msr = 0;
 455         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 456
 457         /* start interrupt urb the first time a port is opened on this device */
 458         if (tdev->td_open_port_count == 0) {
 459                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
 460                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 461                 if (!urb) {
 462                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
 463                         status = -EINVAL;
 464                         goto release_lock;
 465                 }
 466                 urb->context = tdev;
 467                 status = usb_submit_urb(urb, GFP_KERNEL);
 468                 if (status) {
 469                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
 470                         goto release_lock;
 471                 }
 472         }
 473
 474         if (tty)
 475                 ti_set_termios(tty, port, &tty->termios);
 476
 477         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
 478         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 479                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 480         if (status) {
 481                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 482                         __func__, status);
 483                 goto unlink_int_urb;
 484         }
 485
 486         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
 487         status = ti_command_out_sync(tdev, TI_START_PORT,
 488                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 489         if (status) {
 490                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 491                                                         __func__, status);
 492                 goto unlink_int_urb;
 493         }
 494
 495         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
 496         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 497                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 498         if (status) {
 499                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 500                                                         __func__, status);
 501                 goto unlink_int_urb;
 502         }
 503         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 504                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 505         if (status) {
 506                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 507                                                         __func__, status);
 508                 goto unlink_int_urb;
 509         }
 510
 511         /* reset the data toggle on the bulk endpoints to work around bug in
 512          * host controllers where things get out of sync some times */
 513         usb_clear_halt(dev, port->write_urb->pipe);
 514         usb_clear_halt(dev, port->read_urb->pipe);
 515
 516         if (tty)
 517                 ti_set_termios(tty, port, &tty->termios);
 518
 519         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
 520         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 521                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 522         if (status) {
 523                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 524                                                         __func__, status);
 525                 goto unlink_int_urb;
 526         }
 527
 528         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
 529         status = ti_command_out_sync(tdev, TI_START_PORT,
 530                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 531         if (status) {
 532                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 533                                                         __func__, status);
 534                 goto unlink_int_urb;
 535         }
 536
 537         /* start read urb */
 538         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
 539         urb = port->read_urb;
 540         if (!urb) {
 541                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 542                 status = -EINVAL;
 543                 goto unlink_int_urb;
 544         }
 545         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 546         urb->context = tport;
 547         status = usb_submit_urb(urb, GFP_KERNEL);
 548         if (status) {
 549                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 550                                                         __func__, status);
 551                 goto unlink_int_urb;
 552         }
 553
 554         tport->tp_is_open = 1;
 555         ++tdev->td_open_port_count;
 556
 557         goto release_lock;
 558
 559 unlink_int_urb:
 560         if (tdev->td_open_port_count == 0)
 561                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 562 release_lock:
 563         mutex_unlock(&tdev->td_open_close_lock);
 564         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
 565         return status;
 566 }
 567
 568
 569 static void ti_close(struct usb_serial_port *port)
 570 {
 571         struct ti_device *tdev;
 572         struct ti_port *tport;
 573         int port_number;
 574         int status;
 575         int do_unlock;
 576         unsigned long flags;
 577
 578         tdev = usb_get_serial_data(port->serial);
 579         tport = usb_get_serial_port_data(port);
 580         if (tdev == NULL || tport == NULL)
 581                 return;
 582
 583         tport->tp_is_open = 0;
 584
 585         usb_kill_urb(port->read_urb);
 586         usb_kill_urb(port->write_urb);
 587         tport->tp_write_urb_in_use = 0;
 588         spin_lock_irqsave(&tport->tp_lock, flags);
 589         kfifo_reset_out(&port->write_fifo);
 590         spin_unlock_irqrestore(&tport->tp_lock, flags);
 591
 592         port_number = port->port_number;
 593
 594         dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
 595         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 596                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 597         if (status)
 598                 dev_err(&port->dev,
 599                         "%s - cannot send close port command, %d\n"
 600                                                         , __func__, status);
 601
 602         /* if mutex_lock is interrupted, continue anyway */
 603         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 604         --tport->tp_tdev->td_open_port_count;
 605         if (tport->tp_tdev->td_open_port_count <= 0) {
 606                 /* last port is closed, shut down interrupt urb */
 607                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 608                 tport->tp_tdev->td_open_port_count = 0;
 609         }
 610         if (do_unlock)
 611                 mutex_unlock(&tdev->td_open_close_lock);
 612 }
 613
 614
 615 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 616                         const unsigned char *data, int count)
 617 {
 618         struct ti_port *tport = usb_get_serial_port_data(port);
 619
 620         if (count == 0) {
 621                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
 622                 return 0;
 623         }
 624
 625         if (tport == NULL || !tport->tp_is_open)
 626                 return -ENODEV;
 627
 628         count = kfifo_in_locked(&port->write_fifo, data, count,
 629                                                         &tport->tp_lock);
 630         ti_send(tport);
 631
 632         return count;
 633 }
 634
 635
 636 static int ti_write_room(struct tty_struct *tty)
 637 {
 638         struct usb_serial_port *port = tty->driver_data;
 639         struct ti_port *tport = usb_get_serial_port_data(port);
 640         int room = 0;
 641         unsigned long flags;
 642
 643         if (tport == NULL)
 644                 return 0;
 645
 646         spin_lock_irqsave(&tport->tp_lock, flags);
 647         room = kfifo_avail(&port->write_fifo);
 648         spin_unlock_irqrestore(&tport->tp_lock, flags);
 649
 650         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
 651         return room;
 652 }
 653
 654
 655 static int ti_chars_in_buffer(struct tty_struct *tty)
 656 {
 657         struct usb_serial_port *port = tty->driver_data;
 658         struct ti_port *tport = usb_get_serial_port_data(port);
 659         int chars = 0;
 660         unsigned long flags;
 661
 662         if (tport == NULL)
 663                 return 0;
 664
 665         spin_lock_irqsave(&tport->tp_lock, flags);
 666         chars = kfifo_len(&port->write_fifo);
 667         spin_unlock_irqrestore(&tport->tp_lock, flags);
 668
 669         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
 670         return chars;
 671 }
 672
 673 static bool ti_tx_empty(struct usb_serial_port *port)
 674 {
 675         struct ti_port *tport = usb_get_serial_port_data(port);
 676         int ret;
 677         u8 lsr;
 678
 679         ret = ti_get_lsr(tport, &lsr);
 680         if (!ret && !(lsr & TI_LSR_TX_EMPTY))
 681                 return false;
 682
 683         return true;
 684 }
 685
 686 static void ti_throttle(struct tty_struct *tty)
 687 {
 688         struct usb_serial_port *port = tty->driver_data;
 689         struct ti_port *tport = usb_get_serial_port_data(port);
 690
 691         if (tport == NULL)
 692                 return;
 693
 694         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 695                 ti_stop_read(tport, tty);
 696
 697 }
 698
 699
 700 static void ti_unthrottle(struct tty_struct *tty)
 701 {
 702         struct usb_serial_port *port = tty->driver_data;
 703         struct ti_port *tport = usb_get_serial_port_data(port);
 704         int status;
 705
 706         if (tport == NULL)
 707                 return;
 708
 709         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 710                 status = ti_restart_read(tport, tty);
 711                 if (status)
 712                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 713                                                         __func__, status);
 714         }
 715 }
 716
 717 static int ti_ioctl(struct tty_struct *tty,
 718         unsigned int cmd, unsigned long arg)
 719 {
 720         struct usb_serial_port *port = tty->driver_data;
 721         struct ti_port *tport = usb_get_serial_port_data(port);
 722
 723         if (tport == NULL)
 724                 return -ENODEV;
 725
 726         switch (cmd) {
 727         case TIOCGSERIAL:
 728                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
 729                 return ti_get_serial_info(tport,
 730                                 (struct serial_struct __user *)arg);
 731         case TIOCSSERIAL:
 732                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
 733                 return ti_set_serial_info(tty, tport,
 734                                 (struct serial_struct __user *)arg);
 735         }
 736         return -ENOIOCTLCMD;
 737 }
 738
 739
 740 static void ti_set_termios(struct tty_struct *tty,
 741                 struct usb_serial_port *port, struct ktermios *old_termios)
 742 {
 743         struct ti_port *tport = usb_get_serial_port_data(port);
 744         struct ti_uart_config *config;
 745         tcflag_t cflag, iflag;
 746         int baud;
 747         int status;
 748         int port_number = port->port_number;
 749         unsigned int mcr;
 750
 751         cflag = tty->termios.c_cflag;
 752         iflag = tty->termios.c_iflag;
 753
 754         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
 755         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
 756                 old_termios->c_cflag, old_termios->c_iflag);
 757
 758         if (tport == NULL)
 759                 return;
 760
 761         config = kmalloc(sizeof(*config), GFP_KERNEL);
 762         if (!config)
 763                 return;
 764
 765         config->wFlags = 0;
 766
 767         /* these flags must be set */
 768         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 769         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 770         config->bUartMode = (__u8)(tport->tp_uart_mode);
 771
 772         switch (cflag & CSIZE) {
 773         case CS5:
 774                     config->bDataBits = TI_UART_5_DATA_BITS;
 775                     break;
 776         case CS6:
 777                     config->bDataBits = TI_UART_6_DATA_BITS;
 778                     break;
 779         case CS7:
 780                     config->bDataBits = TI_UART_7_DATA_BITS;
 781                     break;
 782         default:
 783         case CS8:
 784                     config->bDataBits = TI_UART_8_DATA_BITS;
 785                     break;
 786         }
 787
 788         /* CMSPAR isn't supported by this driver */
 789         tty->termios.c_cflag &= ~CMSPAR;
 790
 791         if (cflag & PARENB) {
 792                 if (cflag & PARODD) {
 793                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 794                         config->bParity = TI_UART_ODD_PARITY;
 795                 } else {
 796                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 797                         config->bParity = TI_UART_EVEN_PARITY;
 798                 }
 799         } else {
 800                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 801                 config->bParity = TI_UART_NO_PARITY;
 802         }
 803
 804         if (cflag & CSTOPB)
 805                 config->bStopBits = TI_UART_2_STOP_BITS;
 806         else
 807                 config->bStopBits = TI_UART_1_STOP_BITS;
 808
 809         if (cflag & CRTSCTS) {
 810                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 811                 if ((cflag & CBAUD) != B0)
 812                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 813                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 814         } else {
 815                 ti_restart_read(tport, tty);
 816         }
 817
 818         if (I_IXOFF(tty) || I_IXON(tty)) {
 819                 config->cXon  = START_CHAR(tty);
 820                 config->cXoff = STOP_CHAR(tty);
 821
 822                 if (I_IXOFF(tty))
 823                         config->wFlags |= TI_UART_ENABLE_X_IN;
 824                 else
 825                         ti_restart_read(tport, tty);
 826
 827                 if (I_IXON(tty))
 828                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 829         }
 830
 831         baud = tty_get_baud_rate(tty);
 832         if (!baud)
 833                 baud = 9600;
 834         if (tport->tp_tdev->td_is_3410)
 835                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 836         else
 837                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 838
 839         /* FIXME: Should calculate resulting baud here and report it back */
 840         if ((cflag & CBAUD) != B0)
 841                 tty_encode_baud_rate(tty, baud, baud);
 842
 843         dev_dbg(&port->dev,
 844                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d\n",
 845                 __func__, baud, config->wBaudRate, config->wFlags,
 846                 config->bDataBits, config->bParity, config->bStopBits,
 847                 config->cXon, config->cXoff, config->bUartMode);
 848
 849         cpu_to_be16s(&config->wBaudRate);
 850         cpu_to_be16s(&config->wFlags);
 851
 852         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 853                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 854                 sizeof(*config));
 855         if (status)
 856                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 857                                         __func__, port_number, status);
 858
 859         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 860         mcr = tport->tp_shadow_mcr;
 861         /* if baud rate is B0, clear RTS and DTR */
 862         if ((cflag & CBAUD) == B0)
 863                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 864         status = ti_set_mcr(tport, mcr);
 865         if (status)
 866                 dev_err(&port->dev,
 867                         "%s - cannot set modem control on port %d, %d\n",
 868                                                 __func__, port_number, status);
 869
 870         kfree(config);
 871 }
 872
 873
 874 static int ti_tiocmget(struct tty_struct *tty)
 875 {
 876         struct usb_serial_port *port = tty->driver_data;
 877         struct ti_port *tport = usb_get_serial_port_data(port);
 878         unsigned int result;
 879         unsigned int msr;
 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         msr = tport->tp_msr;
 888         mcr = tport->tp_shadow_mcr;
 889         spin_unlock_irqrestore(&tport->tp_lock, flags);
 890
 891         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
 892                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
 893                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
 894                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
 895                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
 896                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
 897                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
 898
 899         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
 900
 901         return result;
 902 }
 903
 904
 905 static int ti_tiocmset(struct tty_struct *tty,
 906                                 unsigned int set, unsigned int clear)
 907 {
 908         struct usb_serial_port *port = tty->driver_data;
 909         struct ti_port *tport = usb_get_serial_port_data(port);
 910         unsigned int mcr;
 911         unsigned long flags;
 912
 913         if (tport == NULL)
 914                 return -ENODEV;
 915
 916         spin_lock_irqsave(&tport->tp_lock, flags);
 917         mcr = tport->tp_shadow_mcr;
 918
 919         if (set & TIOCM_RTS)
 920                 mcr |= TI_MCR_RTS;
 921         if (set & TIOCM_DTR)
 922                 mcr |= TI_MCR_DTR;
 923         if (set & TIOCM_LOOP)
 924                 mcr |= TI_MCR_LOOP;
 925
 926         if (clear & TIOCM_RTS)
 927                 mcr &= ~TI_MCR_RTS;
 928         if (clear & TIOCM_DTR)
 929                 mcr &= ~TI_MCR_DTR;
 930         if (clear & TIOCM_LOOP)
 931                 mcr &= ~TI_MCR_LOOP;
 932         spin_unlock_irqrestore(&tport->tp_lock, flags);
 933
 934         return ti_set_mcr(tport, mcr);
 935 }
 936
 937
 938 static void ti_break(struct tty_struct *tty, int break_state)
 939 {
 940         struct usb_serial_port *port = tty->driver_data;
 941         struct ti_port *tport = usb_get_serial_port_data(port);
 942         int status;
 943
 944         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
 945
 946         if (tport == NULL)
 947                 return;
 948
 949         status = ti_write_byte(port, tport->tp_tdev,
 950                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
 951                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
 952
 953         if (status)
 954                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
 955 }
 956
 957
 958 static void ti_interrupt_callback(struct urb *urb)
 959 {
 960         struct ti_device *tdev = urb->context;
 961         struct usb_serial_port *port;
 962         struct usb_serial *serial = tdev->td_serial;
 963         struct ti_port *tport;
 964         struct device *dev = &urb->dev->dev;
 965         unsigned char *data = urb->transfer_buffer;
 966         int length = urb->actual_length;
 967         int port_number;
 968         int function;
 969         int status = urb->status;
 970         int retval;
 971         __u8 msr;
 972
 973         switch (status) {
 974         case 0:
 975                 break;
 976         case -ECONNRESET:
 977         case -ENOENT:
 978         case -ESHUTDOWN:
 979                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
 980                 tdev->td_urb_error = 1;
 981                 return;
 982         default:
 983                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
 984                 tdev->td_urb_error = 1;
 985                 goto exit;
 986         }
 987
 988         if (length != 2) {
 989                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
 990                 goto exit;
 991         }
 992
 993         if (data[0] == TI_CODE_HARDWARE_ERROR) {
 994                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
 995                 goto exit;
 996         }
 997
 998         port_number = TI_GET_PORT_FROM_CODE(data[0]);
 999         function = TI_GET_FUNC_FROM_CODE(data[0]);
1000
1001         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
1002                 __func__, port_number, function, data[1]);
1003
1004         if (port_number >= serial->num_ports) {
1005                 dev_err(dev, "%s - bad port number, %d\n",
1006                                                 __func__, port_number);
1007                 goto exit;
1008         }
1009
1010         port = serial->port[port_number];
1011
1012         tport = usb_get_serial_port_data(port);
1013         if (!tport)
1014                 goto exit;
1015
1016         switch (function) {
1017         case TI_CODE_DATA_ERROR:
1018                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1019                         __func__, port_number, data[1]);
1020                 break;
1021
1022         case TI_CODE_MODEM_STATUS:
1023                 msr = data[1];
1024                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
1025                 ti_handle_new_msr(tport, msr);
1026                 break;
1027
1028         default:
1029                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1030                                                         __func__, data[1]);
1031                 break;
1032         }
1033
1034 exit:
1035         retval = usb_submit_urb(urb, GFP_ATOMIC);
1036         if (retval)
1037                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1038                         __func__, retval);
1039 }
1040
1041
1042 static void ti_bulk_in_callback(struct urb *urb)
1043 {
1044         struct ti_port *tport = urb->context;
1045         struct usb_serial_port *port = tport->tp_port;
1046         struct device *dev = &urb->dev->dev;
1047         int status = urb->status;
1048         int retval = 0;
1049
1050         switch (status) {
1051         case 0:
1052                 break;
1053         case -ECONNRESET:
1054         case -ENOENT:
1055         case -ESHUTDOWN:
1056                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1057                 tport->tp_tdev->td_urb_error = 1;
1058                 return;
1059         default:
1060                 dev_err(dev, "%s - nonzero urb status, %d\n",
1061                         __func__, status);
1062                 tport->tp_tdev->td_urb_error = 1;
1063         }
1064
1065         if (status == -EPIPE)
1066                 goto exit;
1067
1068         if (status) {
1069                 dev_err(dev, "%s - stopping read!\n", __func__);
1070                 return;
1071         }
1072
1073         if (urb->actual_length) {
1074                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1075                                       urb->transfer_buffer);
1076
1077                 if (!tport->tp_is_open)
1078                         dev_dbg(dev, "%s - port closed, dropping data\n",
1079                                 __func__);
1080                 else
1081                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1082                 spin_lock(&tport->tp_lock);
1083                 port->icount.rx += urb->actual_length;
1084                 spin_unlock(&tport->tp_lock);
1085         }
1086
1087 exit:
1088         /* continue to read unless stopping */
1089         spin_lock(&tport->tp_lock);
1090         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1091                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1092         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1093                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1094
1095         spin_unlock(&tport->tp_lock);
1096         if (retval)
1097                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1098                         __func__, retval);
1099 }
1100
1101
1102 static void ti_bulk_out_callback(struct urb *urb)
1103 {
1104         struct ti_port *tport = urb->context;
1105         struct usb_serial_port *port = tport->tp_port;
1106         int status = urb->status;
1107
1108         tport->tp_write_urb_in_use = 0;
1109
1110         switch (status) {
1111         case 0:
1112                 break;
1113         case -ECONNRESET:
1114         case -ENOENT:
1115         case -ESHUTDOWN:
1116                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1117                 tport->tp_tdev->td_urb_error = 1;
1118                 return;
1119         default:
1120                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1121                         __func__, status);
1122                 tport->tp_tdev->td_urb_error = 1;
1123         }
1124
1125         /* send any buffered data */
1126         ti_send(tport);
1127 }
1128
1129
1130 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1131                 int length)
1132 {
1133         int cnt;
1134
1135         do {
1136                 cnt = tty_insert_flip_string(&port->port, data, length);
1137                 if (cnt < length) {
1138                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1139                                                 __func__, length - cnt);
1140                         if (cnt == 0)
1141                                 break;
1142                 }
1143                 tty_flip_buffer_push(&port->port);
1144                 data += cnt;
1145                 length -= cnt;
1146         } while (length > 0);
1147 }
1148
1149
1150 static void ti_send(struct ti_port *tport)
1151 {
1152         int count, result;
1153         struct usb_serial_port *port = tport->tp_port;
1154         unsigned long flags;
1155
1156         spin_lock_irqsave(&tport->tp_lock, flags);
1157
1158         if (tport->tp_write_urb_in_use)
1159                 goto unlock;
1160
1161         count = kfifo_out(&port->write_fifo,
1162                                 port->write_urb->transfer_buffer,
1163                                 port->bulk_out_size);
1164
1165         if (count == 0)
1166                 goto unlock;
1167
1168         tport->tp_write_urb_in_use = 1;
1169
1170         spin_unlock_irqrestore(&tport->tp_lock, flags);
1171
1172         usb_serial_debug_data(&port->dev, __func__, count,
1173                               port->write_urb->transfer_buffer);
1174
1175         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1176                            usb_sndbulkpipe(port->serial->dev,
1177                                             port->bulk_out_endpointAddress),
1178                            port->write_urb->transfer_buffer, count,
1179                            ti_bulk_out_callback, tport);
1180
1181         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1182         if (result) {
1183                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1184                                                         __func__, result);
1185                 tport->tp_write_urb_in_use = 0;
1186                 /* TODO: reschedule ti_send */
1187         } else {
1188                 spin_lock_irqsave(&tport->tp_lock, flags);
1189                 port->icount.tx += count;
1190                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1191         }
1192
1193         /* more room in the buffer for new writes, wakeup */
1194         tty_port_tty_wakeup(&port->port);
1195
1196         return;
1197 unlock:
1198         spin_unlock_irqrestore(&tport->tp_lock, flags);
1199         return;
1200 }
1201
1202
1203 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1204 {
1205         unsigned long flags;
1206         int status;
1207
1208         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1209                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1210                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1211
1212         spin_lock_irqsave(&tport->tp_lock, flags);
1213         if (!status)
1214                 tport->tp_shadow_mcr = mcr;
1215         spin_unlock_irqrestore(&tport->tp_lock, flags);
1216
1217         return status;
1218 }
1219
1220
1221 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1222 {
1223         int size, status;
1224         struct ti_device *tdev = tport->tp_tdev;
1225         struct usb_serial_port *port = tport->tp_port;
1226         int port_number = port->port_number;
1227         struct ti_port_status *data;
1228
1229         size = sizeof(struct ti_port_status);
1230         data = kmalloc(size, GFP_KERNEL);
1231         if (!data)
1232                 return -ENOMEM;
1233
1234         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1235                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1236         if (status) {
1237                 dev_err(&port->dev,
1238                         "%s - get port status command failed, %d\n",
1239                                                         __func__, status);
1240                 goto free_data;
1241         }
1242
1243         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1244
1245         *lsr = data->bLSR;
1246
1247 free_data:
1248         kfree(data);
1249         return status;
1250 }
1251
1252
1253 static int ti_get_serial_info(struct ti_port *tport,
1254         struct serial_struct __user *ret_arg)
1255 {
1256         struct usb_serial_port *port = tport->tp_port;
1257         struct serial_struct ret_serial;
1258         unsigned cwait;
1259
1260         if (!ret_arg)
1261                 return -EFAULT;
1262
1263         cwait = port->port.closing_wait;
1264         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1265                 cwait = jiffies_to_msecs(cwait) / 10;
1266
1267         memset(&ret_serial, 0, sizeof(ret_serial));
1268
1269         ret_serial.type = PORT_16550A;
1270         ret_serial.line = port->minor;
1271         ret_serial.port = port->port_number;
1272         ret_serial.flags = tport->tp_flags;
1273         ret_serial.xmit_fifo_size = kfifo_size(&port->write_fifo);
1274         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1275         ret_serial.closing_wait = cwait;
1276
1277         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1278                 return -EFAULT;
1279
1280         return 0;
1281 }
1282
1283
1284 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1285         struct serial_struct __user *new_arg)
1286 {
1287         struct serial_struct new_serial;
1288         unsigned cwait;
1289
1290         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1291                 return -EFAULT;
1292
1293         cwait = new_serial.closing_wait;
1294         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1295                 cwait = msecs_to_jiffies(10 * new_serial.closing_wait);
1296
1297         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1298         tport->tp_port->port.closing_wait = cwait;
1299
1300         return 0;
1301 }
1302
1303
1304 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1305 {
1306         struct async_icount *icount;
1307         struct tty_struct *tty;
1308         unsigned long flags;
1309
1310         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1311
1312         if (msr & TI_MSR_DELTA_MASK) {
1313                 spin_lock_irqsave(&tport->tp_lock, flags);
1314                 icount = &tport->tp_port->icount;
1315                 if (msr & TI_MSR_DELTA_CTS)
1316                         icount->cts++;
1317                 if (msr & TI_MSR_DELTA_DSR)
1318                         icount->dsr++;
1319                 if (msr & TI_MSR_DELTA_CD)
1320                         icount->dcd++;
1321                 if (msr & TI_MSR_DELTA_RI)
1322                         icount->rng++;
1323                 wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
1324                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1325         }
1326
1327         tport->tp_msr = msr & TI_MSR_MASK;
1328
1329         /* handle CTS flow control */
1330         tty = tty_port_tty_get(&tport->tp_port->port);
1331         if (tty && C_CRTSCTS(tty)) {
1332                 if (msr & TI_MSR_CTS)
1333                         tty_wakeup(tty);
1334         }
1335         tty_kref_put(tty);
1336 }
1337
1338
1339 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1340 {
1341         unsigned long flags;
1342
1343         spin_lock_irqsave(&tport->tp_lock, flags);
1344
1345         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1346                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1347
1348         spin_unlock_irqrestore(&tport->tp_lock, flags);
1349 }
1350
1351
1352 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1353 {
1354         struct urb *urb;
1355         int status = 0;
1356         unsigned long flags;
1357
1358         spin_lock_irqsave(&tport->tp_lock, flags);
1359
1360         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1361                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1362                 urb = tport->tp_port->read_urb;
1363                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1364                 urb->context = tport;
1365                 status = usb_submit_urb(urb, GFP_KERNEL);
1366         } else  {
1367                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1368                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1369         }
1370
1371         return status;
1372 }
1373
1374
1375 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1376         __u16 moduleid, __u16 value, __u8 *data, int size)
1377 {
1378         int status;
1379
1380         status = usb_control_msg(tdev->td_serial->dev,
1381                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1382                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1383                 value, moduleid, data, size, 1000);
1384
1385         if (status == size)
1386                 status = 0;
1387
1388         if (status > 0)
1389                 status = -ECOMM;
1390
1391         return status;
1392 }
1393
1394
1395 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1396         __u16 moduleid, __u16 value, __u8 *data, int size)
1397 {
1398         int status;
1399
1400         status = usb_control_msg(tdev->td_serial->dev,
1401                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1402                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1403                 value, moduleid, data, size, 1000);
1404
1405         if (status == size)
1406                 status = 0;
1407
1408         if (status > 0)
1409                 status = -ECOMM;
1410
1411         return status;
1412 }
1413
1414
1415 static int ti_write_byte(struct usb_serial_port *port,
1416                         struct ti_device *tdev, unsigned long addr,
1417                         __u8 mask, __u8 byte)
1418 {
1419         int status;
1420         unsigned int size;
1421         struct ti_write_data_bytes *data;
1422
1423         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1424                 addr, mask, byte);
1425
1426         size = sizeof(struct ti_write_data_bytes) + 2;
1427         data = kmalloc(size, GFP_KERNEL);
1428         if (!data)
1429                 return -ENOMEM;
1430
1431         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1432         data->bDataType = TI_RW_DATA_BYTE;
1433         data->bDataCounter = 1;
1434         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1435         data->wBaseAddrLo = cpu_to_be16(addr);
1436         data->bData[0] = mask;
1437         data->bData[1] = byte;
1438
1439         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1440                 (__u8 *)data, size);
1441
1442         if (status < 0)
1443                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1444
1445         kfree(data);
1446
1447         return status;
1448 }
1449
1450 static int ti_do_download(struct usb_device *dev, int pipe,
1451                                                 u8 *buffer, int size)
1452 {
1453         int pos;
1454         u8 cs = 0;
1455         int done;
1456         struct ti_firmware_header *header;
1457         int status = 0;
1458         int len;
1459
1460         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1461                 cs = (__u8)(cs + buffer[pos]);
1462
1463         header = (struct ti_firmware_header *)buffer;
1464         header->wLength = cpu_to_le16((__u16)(size
1465                                         - sizeof(struct ti_firmware_header)));
1466         header->bCheckSum = cs;
1467
1468         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1469         for (pos = 0; pos < size; pos += done) {
1470                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1471                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1472                                                                 &done, 1000);
1473                 if (status)
1474                         break;
1475         }
1476         return status;
1477 }
1478
1479 static int ti_download_firmware(struct ti_device *tdev)
1480 {
1481         int status;
1482         int buffer_size;
1483         __u8 *buffer;
1484         struct usb_device *dev = tdev->td_serial->dev;
1485         unsigned int pipe = usb_sndbulkpipe(dev,
1486                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1487         const struct firmware *fw_p;
1488         char buf[32];
1489
1490         if (le16_to_cpu(dev->descriptor.idVendor) == MXU1_VENDOR_ID) {
1491                 snprintf(buf,
1492                         sizeof(buf),
1493                         "moxa/moxa-%04x.fw",
1494                         le16_to_cpu(dev->descriptor.idProduct));
1495
1496                 status = request_firmware(&fw_p, buf, &dev->dev);
1497                 goto check_firmware;
1498         }
1499
1500         /* try ID specific firmware first, then try generic firmware */
1501         sprintf(buf, "ti_usb-v%04x-p%04x.fw",
1502                         le16_to_cpu(dev->descriptor.idVendor),
1503                         le16_to_cpu(dev->descriptor.idProduct));
1504         status = request_firmware(&fw_p, buf, &dev->dev);
1505
1506         if (status != 0) {
1507                 buf[0] = '\0';
1508                 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
1509                         switch (le16_to_cpu(dev->descriptor.idProduct)) {
1510                         case MTS_CDMA_PRODUCT_ID:
1511                                 strcpy(buf, "mts_cdma.fw");
1512                                 break;
1513                         case MTS_GSM_PRODUCT_ID:
1514                                 strcpy(buf, "mts_gsm.fw");
1515                                 break;
1516                         case MTS_EDGE_PRODUCT_ID:
1517                                 strcpy(buf, "mts_edge.fw");
1518                                 break;
1519                         case MTS_MT9234MU_PRODUCT_ID:
1520                                 strcpy(buf, "mts_mt9234mu.fw");
1521                                 break;
1522                         case MTS_MT9234ZBA_PRODUCT_ID:
1523                                 strcpy(buf, "mts_mt9234zba.fw");
1524                                 break;
1525                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1526                                 strcpy(buf, "mts_mt9234zba.fw");
1527                                 break;                  }
1528                 }
1529                 if (buf[0] == '\0') {
1530                         if (tdev->td_is_3410)
1531                                 strcpy(buf, "ti_3410.fw");
1532                         else
1533                                 strcpy(buf, "ti_5052.fw");
1534                 }
1535                 status = request_firmware(&fw_p, buf, &dev->dev);
1536         }
1537
1538 check_firmware:
1539         if (status) {
1540                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1541                 return -ENOENT;
1542         }
1543         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1544                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1545                 release_firmware(fw_p);
1546                 return -ENOENT;
1547         }
1548
1549         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1550         buffer = kmalloc(buffer_size, GFP_KERNEL);
1551         if (buffer) {
1552                 memcpy(buffer, fw_p->data, fw_p->size);
1553                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1554                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1555                 kfree(buffer);
1556         } else {
1557                 status = -ENOMEM;
1558         }
1559         release_firmware(fw_p);
1560         if (status) {
1561                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1562                                                         __func__, status);
1563                 return status;
1564         }
1565
1566         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1567
1568         return 0;
1569 }