drivers/usb/serial/ti_usb_3410_5052.c

   1 /* vi: ts=8 sw=8
   2  *
   3  * TI 3410/5052 USB Serial Driver
   4  *
   5  * Copyright (C) 2004 Texas Instruments
   6  *
   7  * This driver is based on the Linux io_ti driver, which is
   8  *   Copyright (C) 2000-2002 Inside Out Networks
   9  *   Copyright (C) 2001-2002 Greg Kroah-Hartman
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * For questions or problems with this driver, contact Texas Instruments
  17  * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
  18  * Peter Berger <pberger@brimson.com>.
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <linux/errno.h>
  23 #include <linux/firmware.h>
  24 #include <linux/init.h>
  25 #include <linux/slab.h>
  26 #include <linux/tty.h>
  27 #include <linux/tty_driver.h>
  28 #include <linux/tty_flip.h>
  29 #include <linux/module.h>
  30 #include <linux/spinlock.h>
  31 #include <linux/ioctl.h>
  32 #include <linux/serial.h>
  33 #include <linux/kfifo.h>
  34 #include <linux/mutex.h>
  35 #include <linux/uaccess.h>
  36 #include <linux/usb.h>
  37 #include <linux/usb/serial.h>
  38
  39 #include "ti_usb_3410_5052.h"
  40
  41 /* Defines */
  42
  43 #define TI_DRIVER_VERSION       "v0.10"
  44 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
  45 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
  46
  47 #define TI_FIRMWARE_BUF_SIZE    16284
  48
  49 #define TI_WRITE_BUF_SIZE       1024
  50
  51 #define TI_TRANSFER_TIMEOUT     2
  52
  53 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
  54
  55 /* supported setserial flags */
  56 #define TI_SET_SERIAL_FLAGS     0
  57
  58 /* read urb states */
  59 #define TI_READ_URB_RUNNING     0
  60 #define TI_READ_URB_STOPPING    1
  61 #define TI_READ_URB_STOPPED     2
  62
  63 #define TI_EXTRA_VID_PID_COUNT  5
  64
  65
  66 /* Structures */
  67
  68 struct ti_port {
  69         int                     tp_is_open;
  70         __u8                    tp_msr;
  71         __u8                    tp_lsr;
  72         __u8                    tp_shadow_mcr;
  73         __u8                    tp_uart_mode;   /* 232 or 485 modes */
  74         unsigned int            tp_uart_base_addr;
  75         int                     tp_flags;
  76         int                     tp_closing_wait;/* in .01 secs */
  77         struct async_icount     tp_icount;
  78         wait_queue_head_t       tp_msr_wait;    /* wait for msr change */
  79         wait_queue_head_t       tp_write_wait;
  80         struct ti_device        *tp_tdev;
  81         struct usb_serial_port  *tp_port;
  82         spinlock_t              tp_lock;
  83         int                     tp_read_urb_state;
  84         int                     tp_write_urb_in_use;
  85         struct kfifo            write_fifo;
  86 };
  87
  88 struct ti_device {
  89         struct mutex            td_open_close_lock;
  90         int                     td_open_port_count;
  91         struct usb_serial       *td_serial;
  92         int                     td_is_3410;
  93         int                     td_urb_error;
  94 };
  95
  96
  97 /* Function Declarations */
  98
  99 static int ti_startup(struct usb_serial *serial);
 100 static void ti_release(struct usb_serial *serial);
 101 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
 102 static void ti_close(struct usb_serial_port *port);
 103 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 104                 const unsigned char *data, int count);
 105 static int ti_write_room(struct tty_struct *tty);
 106 static int ti_chars_in_buffer(struct tty_struct *tty);
 107 static void ti_throttle(struct tty_struct *tty);
 108 static void ti_unthrottle(struct tty_struct *tty);
 109 static int ti_ioctl(struct tty_struct *tty,
 110                 unsigned int cmd, unsigned long arg);
 111 static int ti_get_icount(struct tty_struct *tty,
 112                 struct serial_icounter_struct *icount);
 113 static void ti_set_termios(struct tty_struct *tty,
 114                 struct usb_serial_port *port, struct ktermios *old_termios);
 115 static int ti_tiocmget(struct tty_struct *tty);
 116 static int ti_tiocmset(struct tty_struct *tty,
 117                 unsigned int set, unsigned int clear);
 118 static void ti_break(struct tty_struct *tty, int break_state);
 119 static void ti_interrupt_callback(struct urb *urb);
 120 static void ti_bulk_in_callback(struct urb *urb);
 121 static void ti_bulk_out_callback(struct urb *urb);
 122
 123 static void ti_recv(struct device *dev, struct tty_struct *tty,
 124         unsigned char *data, int length);
 125 static void ti_send(struct ti_port *tport);
 126 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 127 static int ti_get_lsr(struct ti_port *tport);
 128 static int ti_get_serial_info(struct ti_port *tport,
 129         struct serial_struct __user *ret_arg);
 130 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 131         struct serial_struct __user *new_arg);
 132 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 133
 134 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
 135
 136 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 137 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 138
 139 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 140         __u16 moduleid, __u16 value, __u8 *data, int size);
 141 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 142         __u16 moduleid, __u16 value, __u8 *data, int size);
 143
 144 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
 145         __u8 mask, __u8 byte);
 146
 147 static int ti_download_firmware(struct ti_device *tdev);
 148
 149
 150 /* Data */
 151
 152 /* module parameters */
 153 static int debug;
 154 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 155 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
 156 static unsigned int vendor_3410_count;
 157 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
 158 static unsigned int product_3410_count;
 159 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
 160 static unsigned int vendor_5052_count;
 161 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
 162 static unsigned int product_5052_count;
 163
 164 /* supported devices */
 165 /* the array dimension is the number of default entries plus */
 166 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
 167 /* null entry */
 168 static struct usb_device_id ti_id_table_3410[15+TI_EXTRA_VID_PID_COUNT+1] = {
 169         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 170         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 171         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 172         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 173         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 174         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 175         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 176         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 177         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 178         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 179         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 180         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 181         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 182         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 183         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 184 };
 185
 186 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
 187         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 188         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 189         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 190         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 191 };
 192
 193 static struct usb_device_id ti_id_table_combined[19+2*TI_EXTRA_VID_PID_COUNT+1] = {
 194         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 195         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 196         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 197         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 198         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 199         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 200         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 201         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 202         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 203         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 204         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 205         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 206         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 207         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 208         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 209         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 210         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 211         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 212         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 213         { }
 214 };
 215
 216 static struct usb_driver ti_usb_driver = {
 217         .name                   = "ti_usb_3410_5052",
 218         .probe                  = usb_serial_probe,
 219         .disconnect             = usb_serial_disconnect,
 220         .id_table               = ti_id_table_combined,
 221         .no_dynamic_id =        1,
 222 };
 223
 224 static struct usb_serial_driver ti_1port_device = {
 225         .driver = {
 226                 .owner          = THIS_MODULE,
 227                 .name           = "ti_usb_3410_5052_1",
 228         },
 229         .description            = "TI USB 3410 1 port adapter",
 230         .usb_driver             = &ti_usb_driver,
 231         .id_table               = ti_id_table_3410,
 232         .num_ports              = 1,
 233         .attach                 = ti_startup,
 234         .release                = ti_release,
 235         .open                   = ti_open,
 236         .close                  = ti_close,
 237         .write                  = ti_write,
 238         .write_room             = ti_write_room,
 239         .chars_in_buffer        = ti_chars_in_buffer,
 240         .throttle               = ti_throttle,
 241         .unthrottle             = ti_unthrottle,
 242         .ioctl                  = ti_ioctl,
 243         .set_termios            = ti_set_termios,
 244         .tiocmget               = ti_tiocmget,
 245         .tiocmset               = ti_tiocmset,
 246         .get_icount             = ti_get_icount,
 247         .break_ctl              = ti_break,
 248         .read_int_callback      = ti_interrupt_callback,
 249         .read_bulk_callback     = ti_bulk_in_callback,
 250         .write_bulk_callback    = ti_bulk_out_callback,
 251 };
 252
 253 static struct usb_serial_driver ti_2port_device = {
 254         .driver = {
 255                 .owner          = THIS_MODULE,
 256                 .name           = "ti_usb_3410_5052_2",
 257         },
 258         .description            = "TI USB 5052 2 port adapter",
 259         .usb_driver             = &ti_usb_driver,
 260         .id_table               = ti_id_table_5052,
 261         .num_ports              = 2,
 262         .attach                 = ti_startup,
 263         .release                = ti_release,
 264         .open                   = ti_open,
 265         .close                  = ti_close,
 266         .write                  = ti_write,
 267         .write_room             = ti_write_room,
 268         .chars_in_buffer        = ti_chars_in_buffer,
 269         .throttle               = ti_throttle,
 270         .unthrottle             = ti_unthrottle,
 271         .ioctl                  = ti_ioctl,
 272         .set_termios            = ti_set_termios,
 273         .tiocmget               = ti_tiocmget,
 274         .tiocmset               = ti_tiocmset,
 275         .get_icount             = ti_get_icount,
 276         .break_ctl              = ti_break,
 277         .read_int_callback      = ti_interrupt_callback,
 278         .read_bulk_callback     = ti_bulk_in_callback,
 279         .write_bulk_callback    = ti_bulk_out_callback,
 280 };
 281
 282
 283 /* Module */
 284
 285 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 286 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 287 MODULE_VERSION(TI_DRIVER_VERSION);
 288 MODULE_LICENSE("GPL");
 289
 290 MODULE_FIRMWARE("ti_3410.fw");
 291 MODULE_FIRMWARE("ti_5052.fw");
 292 MODULE_FIRMWARE("mts_cdma.fw");
 293 MODULE_FIRMWARE("mts_gsm.fw");
 294 MODULE_FIRMWARE("mts_edge.fw");
 295 MODULE_FIRMWARE("mts_mt9234mu.fw");
 296 MODULE_FIRMWARE("mts_mt9234zba.fw");
 297
 298 module_param(debug, bool, S_IRUGO | S_IWUSR);
 299 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
 300
 301 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 302 MODULE_PARM_DESC(closing_wait,
 303     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 304
 305 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 306 MODULE_PARM_DESC(vendor_3410,
 307                 "Vendor ids for 3410 based devices, 1-5 short integers");
 308 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 309 MODULE_PARM_DESC(product_3410,
 310                 "Product ids for 3410 based devices, 1-5 short integers");
 311 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 312 MODULE_PARM_DESC(vendor_5052,
 313                 "Vendor ids for 5052 based devices, 1-5 short integers");
 314 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 315 MODULE_PARM_DESC(product_5052,
 316                 "Product ids for 5052 based devices, 1-5 short integers");
 317
 318 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 319
 320
 321 /* Functions */
 322
 323 static int __init ti_init(void)
 324 {
 325         int i, j, c;
 326         int ret;
 327
 328         /* insert extra vendor and product ids */
 329         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 330         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 331         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 332                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 333                 ti_id_table_3410[j].idProduct = product_3410[i];
 334                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 335                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 336                 ti_id_table_combined[c].idProduct = product_3410[i];
 337                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 338         }
 339         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 340         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 341                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 342                 ti_id_table_5052[j].idProduct = product_5052[i];
 343                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 344                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 345                 ti_id_table_combined[c].idProduct = product_5052[i];
 346                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 347         }
 348
 349         ret = usb_serial_register(&ti_1port_device);
 350         if (ret)
 351                 goto failed_1port;
 352         ret = usb_serial_register(&ti_2port_device);
 353         if (ret)
 354                 goto failed_2port;
 355
 356         ret = usb_register(&ti_usb_driver);
 357         if (ret)
 358                 goto failed_usb;
 359
 360         printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
 361                TI_DRIVER_DESC "\n");
 362
 363         return 0;
 364
 365 failed_usb:
 366         usb_serial_deregister(&ti_2port_device);
 367 failed_2port:
 368         usb_serial_deregister(&ti_1port_device);
 369 failed_1port:
 370         return ret;
 371 }
 372
 373
 374 static void __exit ti_exit(void)
 375 {
 376         usb_deregister(&ti_usb_driver);
 377         usb_serial_deregister(&ti_1port_device);
 378         usb_serial_deregister(&ti_2port_device);
 379 }
 380
 381
 382 module_init(ti_init);
 383 module_exit(ti_exit);
 384
 385
 386 static int ti_startup(struct usb_serial *serial)
 387 {
 388         struct ti_device *tdev;
 389         struct ti_port *tport;
 390         struct usb_device *dev = serial->dev;
 391         int status;
 392         int i;
 393
 394
 395         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
 396             __func__, le16_to_cpu(dev->descriptor.idProduct),
 397             dev->descriptor.bNumConfigurations,
 398             dev->actconfig->desc.bConfigurationValue);
 399
 400         /* create device structure */
 401         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 402         if (tdev == NULL) {
 403                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 404                 return -ENOMEM;
 405         }
 406         mutex_init(&tdev->td_open_close_lock);
 407         tdev->td_serial = serial;
 408         usb_set_serial_data(serial, tdev);
 409
 410         /* determine device type */
 411         if (usb_match_id(serial->interface, ti_id_table_3410))
 412                 tdev->td_is_3410 = 1;
 413         dbg("%s - device type is %s", __func__,
 414                                 tdev->td_is_3410 ? "3410" : "5052");
 415
 416         /* if we have only 1 configuration, download firmware */
 417         if (dev->descriptor.bNumConfigurations == 1) {
 418                 if ((status = ti_download_firmware(tdev)) != 0)
 419                         goto free_tdev;
 420
 421                 /* 3410 must be reset, 5052 resets itself */
 422                 if (tdev->td_is_3410) {
 423                         msleep_interruptible(100);
 424                         usb_reset_device(dev);
 425                 }
 426
 427                 status = -ENODEV;
 428                 goto free_tdev;
 429         }
 430
 431         /* the second configuration must be set */
 432         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 433                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 434                 status = status ? status : -ENODEV;
 435                 goto free_tdev;
 436         }
 437
 438         /* set up port structures */
 439         for (i = 0; i < serial->num_ports; ++i) {
 440                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
 441                 if (tport == NULL) {
 442                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 443                         status = -ENOMEM;
 444                         goto free_tports;
 445                 }
 446                 spin_lock_init(&tport->tp_lock);
 447                 tport->tp_uart_base_addr = (i == 0 ?
 448                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
 449                 tport->tp_closing_wait = closing_wait;
 450                 init_waitqueue_head(&tport->tp_msr_wait);
 451                 init_waitqueue_head(&tport->tp_write_wait);
 452                 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
 453                                                                 GFP_KERNEL)) {
 454                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 455                         kfree(tport);
 456                         status = -ENOMEM;
 457                         goto free_tports;
 458                 }
 459                 tport->tp_port = serial->port[i];
 460                 tport->tp_tdev = tdev;
 461                 usb_set_serial_port_data(serial->port[i], tport);
 462                 tport->tp_uart_mode = 0;        /* default is RS232 */
 463         }
 464
 465         return 0;
 466
 467 free_tports:
 468         for (--i; i >= 0; --i) {
 469                 tport = usb_get_serial_port_data(serial->port[i]);
 470                 kfifo_free(&tport->write_fifo);
 471                 kfree(tport);
 472                 usb_set_serial_port_data(serial->port[i], NULL);
 473         }
 474 free_tdev:
 475         kfree(tdev);
 476         usb_set_serial_data(serial, NULL);
 477         return status;
 478 }
 479
 480
 481 static void ti_release(struct usb_serial *serial)
 482 {
 483         int i;
 484         struct ti_device *tdev = usb_get_serial_data(serial);
 485         struct ti_port *tport;
 486
 487         dbg("%s", __func__);
 488
 489         for (i = 0; i < serial->num_ports; ++i) {
 490                 tport = usb_get_serial_port_data(serial->port[i]);
 491                 if (tport) {
 492                         kfifo_free(&tport->write_fifo);
 493                         kfree(tport);
 494                 }
 495         }
 496
 497         kfree(tdev);
 498 }
 499
 500
 501 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 502 {
 503         struct ti_port *tport = usb_get_serial_port_data(port);
 504         struct ti_device *tdev;
 505         struct usb_device *dev;
 506         struct urb *urb;
 507         int port_number;
 508         int status;
 509         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 510                              TI_PIPE_TIMEOUT_ENABLE |
 511                              (TI_TRANSFER_TIMEOUT << 2));
 512
 513         dbg("%s - port %d", __func__, port->number);
 514
 515         if (tport == NULL)
 516                 return -ENODEV;
 517
 518         dev = port->serial->dev;
 519         tdev = tport->tp_tdev;
 520
 521         /* only one open on any port on a device at a time */
 522         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 523                 return -ERESTARTSYS;
 524
 525         port_number = port->number - port->serial->minor;
 526
 527         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 528
 529         tport->tp_msr = 0;
 530         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 531
 532         /* start interrupt urb the first time a port is opened on this device */
 533         if (tdev->td_open_port_count == 0) {
 534                 dbg("%s - start interrupt in urb", __func__);
 535                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 536                 if (!urb) {
 537                         dev_err(&port->dev, "%s - no interrupt urb\n",
 538                                                                 __func__);
 539                         status = -EINVAL;
 540                         goto release_lock;
 541                 }
 542                 urb->complete = ti_interrupt_callback;
 543                 urb->context = tdev;
 544                 urb->dev = dev;
 545                 status = usb_submit_urb(urb, GFP_KERNEL);
 546                 if (status) {
 547                         dev_err(&port->dev,
 548                                 "%s - submit interrupt urb failed, %d\n",
 549                                         __func__, status);
 550                         goto release_lock;
 551                 }
 552         }
 553
 554         if (tty)
 555                 ti_set_termios(tty, port, tty->termios);
 556
 557         dbg("%s - sending TI_OPEN_PORT", __func__);
 558         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 559                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 560         if (status) {
 561                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 562                                                         __func__, status);
 563                 goto unlink_int_urb;
 564         }
 565
 566         dbg("%s - sending TI_START_PORT", __func__);
 567         status = ti_command_out_sync(tdev, TI_START_PORT,
 568                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 569         if (status) {
 570                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 571                                                         __func__, status);
 572                 goto unlink_int_urb;
 573         }
 574
 575         dbg("%s - sending TI_PURGE_PORT", __func__);
 576         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 577                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 578         if (status) {
 579                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 580                                                         __func__, status);
 581                 goto unlink_int_urb;
 582         }
 583         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 584                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 585         if (status) {
 586                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 587                                                         __func__, status);
 588                 goto unlink_int_urb;
 589         }
 590
 591         /* reset the data toggle on the bulk endpoints to work around bug in
 592          * host controllers where things get out of sync some times */
 593         usb_clear_halt(dev, port->write_urb->pipe);
 594         usb_clear_halt(dev, port->read_urb->pipe);
 595
 596         if (tty)
 597                 ti_set_termios(tty, port, tty->termios);
 598
 599         dbg("%s - sending TI_OPEN_PORT (2)", __func__);
 600         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 601                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 602         if (status) {
 603                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 604                                                         __func__, status);
 605                 goto unlink_int_urb;
 606         }
 607
 608         dbg("%s - sending TI_START_PORT (2)", __func__);
 609         status = ti_command_out_sync(tdev, TI_START_PORT,
 610                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 611         if (status) {
 612                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 613                                                         __func__, status);
 614                 goto unlink_int_urb;
 615         }
 616
 617         /* start read urb */
 618         dbg("%s - start read urb", __func__);
 619         urb = port->read_urb;
 620         if (!urb) {
 621                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 622                 status = -EINVAL;
 623                 goto unlink_int_urb;
 624         }
 625         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 626         urb->complete = ti_bulk_in_callback;
 627         urb->context = tport;
 628         urb->dev = dev;
 629         status = usb_submit_urb(urb, GFP_KERNEL);
 630         if (status) {
 631                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 632                                                         __func__, status);
 633                 goto unlink_int_urb;
 634         }
 635
 636         tport->tp_is_open = 1;
 637         ++tdev->td_open_port_count;
 638
 639         goto release_lock;
 640
 641 unlink_int_urb:
 642         if (tdev->td_open_port_count == 0)
 643                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 644 release_lock:
 645         mutex_unlock(&tdev->td_open_close_lock);
 646         dbg("%s - exit %d", __func__, status);
 647         return status;
 648 }
 649
 650
 651 static void ti_close(struct usb_serial_port *port)
 652 {
 653         struct ti_device *tdev;
 654         struct ti_port *tport;
 655         int port_number;
 656         int status;
 657         int do_unlock;
 658
 659         dbg("%s - port %d", __func__, port->number);
 660
 661         tdev = usb_get_serial_data(port->serial);
 662         tport = usb_get_serial_port_data(port);
 663         if (tdev == NULL || tport == NULL)
 664                 return;
 665
 666         tport->tp_is_open = 0;
 667
 668         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 669
 670         usb_kill_urb(port->read_urb);
 671         usb_kill_urb(port->write_urb);
 672         tport->tp_write_urb_in_use = 0;
 673
 674         port_number = port->number - port->serial->minor;
 675
 676         dbg("%s - sending TI_CLOSE_PORT", __func__);
 677         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 678                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 679         if (status)
 680                 dev_err(&port->dev,
 681                         "%s - cannot send close port command, %d\n"
 682                                                         , __func__, status);
 683
 684         /* if mutex_lock is interrupted, continue anyway */
 685         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 686         --tport->tp_tdev->td_open_port_count;
 687         if (tport->tp_tdev->td_open_port_count <= 0) {
 688                 /* last port is closed, shut down interrupt urb */
 689                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 690                 tport->tp_tdev->td_open_port_count = 0;
 691         }
 692         if (do_unlock)
 693                 mutex_unlock(&tdev->td_open_close_lock);
 694
 695         dbg("%s - exit", __func__);
 696 }
 697
 698
 699 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 700                         const unsigned char *data, int count)
 701 {
 702         struct ti_port *tport = usb_get_serial_port_data(port);
 703
 704         dbg("%s - port %d", __func__, port->number);
 705
 706         if (count == 0) {
 707                 dbg("%s - write request of 0 bytes", __func__);
 708                 return 0;
 709         }
 710
 711         if (tport == NULL || !tport->tp_is_open)
 712                 return -ENODEV;
 713
 714         count = kfifo_in_locked(&tport->write_fifo, data, count,
 715                                                         &tport->tp_lock);
 716         ti_send(tport);
 717
 718         return count;
 719 }
 720
 721
 722 static int ti_write_room(struct tty_struct *tty)
 723 {
 724         struct usb_serial_port *port = tty->driver_data;
 725         struct ti_port *tport = usb_get_serial_port_data(port);
 726         int room = 0;
 727         unsigned long flags;
 728
 729         dbg("%s - port %d", __func__, port->number);
 730
 731         if (tport == NULL)
 732                 return 0;
 733
 734         spin_lock_irqsave(&tport->tp_lock, flags);
 735         room = kfifo_avail(&tport->write_fifo);
 736         spin_unlock_irqrestore(&tport->tp_lock, flags);
 737
 738         dbg("%s - returns %d", __func__, room);
 739         return room;
 740 }
 741
 742
 743 static int ti_chars_in_buffer(struct tty_struct *tty)
 744 {
 745         struct usb_serial_port *port = tty->driver_data;
 746         struct ti_port *tport = usb_get_serial_port_data(port);
 747         int chars = 0;
 748         unsigned long flags;
 749
 750         dbg("%s - port %d", __func__, port->number);
 751
 752         if (tport == NULL)
 753                 return 0;
 754
 755         spin_lock_irqsave(&tport->tp_lock, flags);
 756         chars = kfifo_len(&tport->write_fifo);
 757         spin_unlock_irqrestore(&tport->tp_lock, flags);
 758
 759         dbg("%s - returns %d", __func__, chars);
 760         return chars;
 761 }
 762
 763
 764 static void ti_throttle(struct tty_struct *tty)
 765 {
 766         struct usb_serial_port *port = tty->driver_data;
 767         struct ti_port *tport = usb_get_serial_port_data(port);
 768
 769         dbg("%s - port %d", __func__, port->number);
 770
 771         if (tport == NULL)
 772                 return;
 773
 774         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 775                 ti_stop_read(tport, tty);
 776
 777 }
 778
 779
 780 static void ti_unthrottle(struct tty_struct *tty)
 781 {
 782         struct usb_serial_port *port = tty->driver_data;
 783         struct ti_port *tport = usb_get_serial_port_data(port);
 784         int status;
 785
 786         dbg("%s - port %d", __func__, port->number);
 787
 788         if (tport == NULL)
 789                 return;
 790
 791         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 792                 status = ti_restart_read(tport, tty);
 793                 if (status)
 794                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 795                                                         __func__, status);
 796         }
 797 }
 798
 799 static int ti_get_icount(struct tty_struct *tty,
 800                 struct serial_icounter_struct *icount)
 801 {
 802         struct usb_serial_port *port = tty->driver_data;
 803         struct ti_port *tport = usb_get_serial_port_data(port);
 804         struct async_icount cnow = tport->tp_icount;
 805
 806         dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
 807                 __func__, port->number,
 808                 cnow.rx, cnow.tx);
 809
 810         icount->cts = cnow.cts;
 811         icount->dsr = cnow.dsr;
 812         icount->rng = cnow.rng;
 813         icount->dcd = cnow.dcd;
 814         icount->rx = cnow.rx;
 815         icount->tx = cnow.tx;
 816         icount->frame = cnow.frame;
 817         icount->overrun = cnow.overrun;
 818         icount->parity = cnow.parity;
 819         icount->brk = cnow.brk;
 820         icount->buf_overrun = cnow.buf_overrun;
 821
 822         return 0;
 823 }
 824
 825 static int ti_ioctl(struct tty_struct *tty,
 826         unsigned int cmd, unsigned long arg)
 827 {
 828         struct usb_serial_port *port = tty->driver_data;
 829         struct ti_port *tport = usb_get_serial_port_data(port);
 830         struct async_icount cnow;
 831         struct async_icount cprev;
 832
 833         dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
 834
 835         if (tport == NULL)
 836                 return -ENODEV;
 837
 838         switch (cmd) {
 839         case TIOCGSERIAL:
 840                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
 841                 return ti_get_serial_info(tport,
 842                                 (struct serial_struct __user *)arg);
 843         case TIOCSSERIAL:
 844                 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
 845                 return ti_set_serial_info(tty, tport,
 846                                 (struct serial_struct __user *)arg);
 847         case TIOCMIWAIT:
 848                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
 849                 cprev = tport->tp_icount;
 850                 while (1) {
 851                         interruptible_sleep_on(&tport->tp_msr_wait);
 852                         if (signal_pending(current))
 853                                 return -ERESTARTSYS;
 854                         cnow = tport->tp_icount;
 855                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 856                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 857                                 return -EIO; /* no change => error */
 858                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 859                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 860                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 861                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
 862                                 return 0;
 863                         cprev = cnow;
 864                 }
 865                 break;
 866         }
 867         return -ENOIOCTLCMD;
 868 }
 869
 870
 871 static void ti_set_termios(struct tty_struct *tty,
 872                 struct usb_serial_port *port, struct ktermios *old_termios)
 873 {
 874         struct ti_port *tport = usb_get_serial_port_data(port);
 875         struct ti_uart_config *config;
 876         tcflag_t cflag, iflag;
 877         int baud;
 878         int status;
 879         int port_number = port->number - port->serial->minor;
 880         unsigned int mcr;
 881
 882         dbg("%s - port %d", __func__, port->number);
 883
 884         cflag = tty->termios->c_cflag;
 885         iflag = tty->termios->c_iflag;
 886
 887         dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
 888         dbg("%s - old clfag %08x, old iflag %08x", __func__,
 889                                 old_termios->c_cflag, old_termios->c_iflag);
 890
 891         if (tport == NULL)
 892                 return;
 893
 894         config = kmalloc(sizeof(*config), GFP_KERNEL);
 895         if (!config) {
 896                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 897                 return;
 898         }
 899
 900         config->wFlags = 0;
 901
 902         /* these flags must be set */
 903         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 904         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 905         config->bUartMode = (__u8)(tport->tp_uart_mode);
 906
 907         switch (cflag & CSIZE) {
 908         case CS5:
 909                     config->bDataBits = TI_UART_5_DATA_BITS;
 910                     break;
 911         case CS6:
 912                     config->bDataBits = TI_UART_6_DATA_BITS;
 913                     break;
 914         case CS7:
 915                     config->bDataBits = TI_UART_7_DATA_BITS;
 916                     break;
 917         default:
 918         case CS8:
 919                     config->bDataBits = TI_UART_8_DATA_BITS;
 920                     break;
 921         }
 922
 923         /* CMSPAR isn't supported by this driver */
 924         tty->termios->c_cflag &= ~CMSPAR;
 925
 926         if (cflag & PARENB) {
 927                 if (cflag & PARODD) {
 928                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 929                         config->bParity = TI_UART_ODD_PARITY;
 930                 } else {
 931                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 932                         config->bParity = TI_UART_EVEN_PARITY;
 933                 }
 934         } else {
 935                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 936                 config->bParity = TI_UART_NO_PARITY;
 937         }
 938
 939         if (cflag & CSTOPB)
 940                 config->bStopBits = TI_UART_2_STOP_BITS;
 941         else
 942                 config->bStopBits = TI_UART_1_STOP_BITS;
 943
 944         if (cflag & CRTSCTS) {
 945                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 946                 if ((cflag & CBAUD) != B0)
 947                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 948                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 949         } else {
 950                 tty->hw_stopped = 0;
 951                 ti_restart_read(tport, tty);
 952         }
 953
 954         if (I_IXOFF(tty) || I_IXON(tty)) {
 955                 config->cXon  = START_CHAR(tty);
 956                 config->cXoff = STOP_CHAR(tty);
 957
 958                 if (I_IXOFF(tty))
 959                         config->wFlags |= TI_UART_ENABLE_X_IN;
 960                 else
 961                         ti_restart_read(tport, tty);
 962
 963                 if (I_IXON(tty))
 964                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 965         }
 966
 967         baud = tty_get_baud_rate(tty);
 968         if (!baud)
 969                 baud = 9600;
 970         if (tport->tp_tdev->td_is_3410)
 971                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 972         else
 973                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 974
 975         /* FIXME: Should calculate resulting baud here and report it back */
 976         if ((cflag & CBAUD) != B0)
 977                 tty_encode_baud_rate(tty, baud, baud);
 978
 979         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 980         __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
 981
 982         cpu_to_be16s(&config->wBaudRate);
 983         cpu_to_be16s(&config->wFlags);
 984
 985         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 986                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 987                 sizeof(*config));
 988         if (status)
 989                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 990                                         __func__, port_number, status);
 991
 992         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 993         mcr = tport->tp_shadow_mcr;
 994         /* if baud rate is B0, clear RTS and DTR */
 995         if ((cflag & CBAUD) == B0)
 996                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 997         status = ti_set_mcr(tport, mcr);
 998         if (status)
 999                 dev_err(&port->dev,
1000                         "%s - cannot set modem control on port %d, %d\n",
1001                                                 __func__, port_number, status);
1002
1003         kfree(config);
1004 }
1005
1006
1007 static int ti_tiocmget(struct tty_struct *tty)
1008 {
1009         struct usb_serial_port *port = tty->driver_data;
1010         struct ti_port *tport = usb_get_serial_port_data(port);
1011         unsigned int result;
1012         unsigned int msr;
1013         unsigned int mcr;
1014         unsigned long flags;
1015
1016         dbg("%s - port %d", __func__, port->number);
1017
1018         if (tport == NULL)
1019                 return -ENODEV;
1020
1021         spin_lock_irqsave(&tport->tp_lock, flags);
1022         msr = tport->tp_msr;
1023         mcr = tport->tp_shadow_mcr;
1024         spin_unlock_irqrestore(&tport->tp_lock, flags);
1025
1026         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1027                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1028                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1029                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1030                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1031                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1032                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1033
1034         dbg("%s - 0x%04X", __func__, result);
1035
1036         return result;
1037 }
1038
1039
1040 static int ti_tiocmset(struct tty_struct *tty,
1041                                 unsigned int set, unsigned int clear)
1042 {
1043         struct usb_serial_port *port = tty->driver_data;
1044         struct ti_port *tport = usb_get_serial_port_data(port);
1045         unsigned int mcr;
1046         unsigned long flags;
1047
1048         dbg("%s - port %d", __func__, port->number);
1049
1050         if (tport == NULL)
1051                 return -ENODEV;
1052
1053         spin_lock_irqsave(&tport->tp_lock, flags);
1054         mcr = tport->tp_shadow_mcr;
1055
1056         if (set & TIOCM_RTS)
1057                 mcr |= TI_MCR_RTS;
1058         if (set & TIOCM_DTR)
1059                 mcr |= TI_MCR_DTR;
1060         if (set & TIOCM_LOOP)
1061                 mcr |= TI_MCR_LOOP;
1062
1063         if (clear & TIOCM_RTS)
1064                 mcr &= ~TI_MCR_RTS;
1065         if (clear & TIOCM_DTR)
1066                 mcr &= ~TI_MCR_DTR;
1067         if (clear & TIOCM_LOOP)
1068                 mcr &= ~TI_MCR_LOOP;
1069         spin_unlock_irqrestore(&tport->tp_lock, flags);
1070
1071         return ti_set_mcr(tport, mcr);
1072 }
1073
1074
1075 static void ti_break(struct tty_struct *tty, int break_state)
1076 {
1077         struct usb_serial_port *port = tty->driver_data;
1078         struct ti_port *tport = usb_get_serial_port_data(port);
1079         int status;
1080
1081         dbg("%s - state = %d", __func__, break_state);
1082
1083         if (tport == NULL)
1084                 return;
1085
1086         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1087
1088         status = ti_write_byte(tport->tp_tdev,
1089                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1090                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1091
1092         if (status)
1093                 dbg("%s - error setting break, %d", __func__, status);
1094 }
1095
1096
1097 static void ti_interrupt_callback(struct urb *urb)
1098 {
1099         struct ti_device *tdev = urb->context;
1100         struct usb_serial_port *port;
1101         struct usb_serial *serial = tdev->td_serial;
1102         struct ti_port *tport;
1103         struct device *dev = &urb->dev->dev;
1104         unsigned char *data = urb->transfer_buffer;
1105         int length = urb->actual_length;
1106         int port_number;
1107         int function;
1108         int status = urb->status;
1109         int retval;
1110         __u8 msr;
1111
1112         dbg("%s", __func__);
1113
1114         switch (status) {
1115         case 0:
1116                 break;
1117         case -ECONNRESET:
1118         case -ENOENT:
1119         case -ESHUTDOWN:
1120                 dbg("%s - urb shutting down, %d", __func__, status);
1121                 tdev->td_urb_error = 1;
1122                 return;
1123         default:
1124                 dev_err(dev, "%s - nonzero urb status, %d\n",
1125                         __func__, status);
1126                 tdev->td_urb_error = 1;
1127                 goto exit;
1128         }
1129
1130         if (length != 2) {
1131                 dbg("%s - bad packet size, %d", __func__, length);
1132                 goto exit;
1133         }
1134
1135         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1136                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1137                 goto exit;
1138         }
1139
1140         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1141         function = TI_GET_FUNC_FROM_CODE(data[0]);
1142
1143         dbg("%s - port_number %d, function %d, data 0x%02X",
1144                                 __func__, port_number, function, data[1]);
1145
1146         if (port_number >= serial->num_ports) {
1147                 dev_err(dev, "%s - bad port number, %d\n",
1148                                                 __func__, port_number);
1149                 goto exit;
1150         }
1151
1152         port = serial->port[port_number];
1153
1154         tport = usb_get_serial_port_data(port);
1155         if (!tport)
1156                 goto exit;
1157
1158         switch (function) {
1159         case TI_CODE_DATA_ERROR:
1160                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1161                                         __func__, port_number, data[1]);
1162                 break;
1163
1164         case TI_CODE_MODEM_STATUS:
1165                 msr = data[1];
1166                 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1167                 ti_handle_new_msr(tport, msr);
1168                 break;
1169
1170         default:
1171                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1172                                                         __func__, data[1]);
1173                 break;
1174         }
1175
1176 exit:
1177         retval = usb_submit_urb(urb, GFP_ATOMIC);
1178         if (retval)
1179                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1180                         __func__, retval);
1181 }
1182
1183
1184 static void ti_bulk_in_callback(struct urb *urb)
1185 {
1186         struct ti_port *tport = urb->context;
1187         struct usb_serial_port *port = tport->tp_port;
1188         struct device *dev = &urb->dev->dev;
1189         int status = urb->status;
1190         int retval = 0;
1191         struct tty_struct *tty;
1192
1193         dbg("%s", __func__);
1194
1195         switch (status) {
1196         case 0:
1197                 break;
1198         case -ECONNRESET:
1199         case -ENOENT:
1200         case -ESHUTDOWN:
1201                 dbg("%s - urb shutting down, %d", __func__, status);
1202                 tport->tp_tdev->td_urb_error = 1;
1203                 wake_up_interruptible(&tport->tp_write_wait);
1204                 return;
1205         default:
1206                 dev_err(dev, "%s - nonzero urb status, %d\n",
1207                         __func__, status);
1208                 tport->tp_tdev->td_urb_error = 1;
1209                 wake_up_interruptible(&tport->tp_write_wait);
1210         }
1211
1212         if (status == -EPIPE)
1213                 goto exit;
1214
1215         if (status) {
1216                 dev_err(dev, "%s - stopping read!\n", __func__);
1217                 return;
1218         }
1219
1220         tty = tty_port_tty_get(&port->port);
1221         if (tty) {
1222                 if (urb->actual_length) {
1223                         usb_serial_debug_data(debug, dev, __func__,
1224                                 urb->actual_length, urb->transfer_buffer);
1225
1226                         if (!tport->tp_is_open)
1227                                 dbg("%s - port closed, dropping data",
1228                                         __func__);
1229                         else
1230                                 ti_recv(&urb->dev->dev, tty,
1231                                                 urb->transfer_buffer,
1232                                                 urb->actual_length);
1233                         spin_lock(&tport->tp_lock);
1234                         tport->tp_icount.rx += urb->actual_length;
1235                         spin_unlock(&tport->tp_lock);
1236                 }
1237                 tty_kref_put(tty);
1238         }
1239
1240 exit:
1241         /* continue to read unless stopping */
1242         spin_lock(&tport->tp_lock);
1243         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1244                 urb->dev = port->serial->dev;
1245                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1246         } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1247                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1248         }
1249         spin_unlock(&tport->tp_lock);
1250         if (retval)
1251                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1252                         __func__, retval);
1253 }
1254
1255
1256 static void ti_bulk_out_callback(struct urb *urb)
1257 {
1258         struct ti_port *tport = urb->context;
1259         struct usb_serial_port *port = tport->tp_port;
1260         struct device *dev = &urb->dev->dev;
1261         int status = urb->status;
1262
1263         dbg("%s - port %d", __func__, port->number);
1264
1265         tport->tp_write_urb_in_use = 0;
1266
1267         switch (status) {
1268         case 0:
1269                 break;
1270         case -ECONNRESET:
1271         case -ENOENT:
1272         case -ESHUTDOWN:
1273                 dbg("%s - urb shutting down, %d", __func__, status);
1274                 tport->tp_tdev->td_urb_error = 1;
1275                 wake_up_interruptible(&tport->tp_write_wait);
1276                 return;
1277         default:
1278                 dev_err(dev, "%s - nonzero urb status, %d\n",
1279                         __func__, status);
1280                 tport->tp_tdev->td_urb_error = 1;
1281                 wake_up_interruptible(&tport->tp_write_wait);
1282         }
1283
1284         /* send any buffered data */
1285         ti_send(tport);
1286 }
1287
1288
1289 static void ti_recv(struct device *dev, struct tty_struct *tty,
1290         unsigned char *data, int length)
1291 {
1292         int cnt;
1293
1294         do {
1295                 cnt = tty_insert_flip_string(tty, data, length);
1296                 if (cnt < length) {
1297                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1298                                                 __func__, length - cnt);
1299                         if (cnt == 0)
1300                                 break;
1301                 }
1302                 tty_flip_buffer_push(tty);
1303                 data += cnt;
1304                 length -= cnt;
1305         } while (length > 0);
1306
1307 }
1308
1309
1310 static void ti_send(struct ti_port *tport)
1311 {
1312         int count, result;
1313         struct usb_serial_port *port = tport->tp_port;
1314         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1315         unsigned long flags;
1316
1317
1318         dbg("%s - port %d", __func__, port->number);
1319
1320         spin_lock_irqsave(&tport->tp_lock, flags);
1321
1322         if (tport->tp_write_urb_in_use)
1323                 goto unlock;
1324
1325         count = kfifo_out(&tport->write_fifo,
1326                                 port->write_urb->transfer_buffer,
1327                                 port->bulk_out_size);
1328
1329         if (count == 0)
1330                 goto unlock;
1331
1332         tport->tp_write_urb_in_use = 1;
1333
1334         spin_unlock_irqrestore(&tport->tp_lock, flags);
1335
1336         usb_serial_debug_data(debug, &port->dev, __func__, count,
1337                                         port->write_urb->transfer_buffer);
1338
1339         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1340                            usb_sndbulkpipe(port->serial->dev,
1341                                             port->bulk_out_endpointAddress),
1342                            port->write_urb->transfer_buffer, count,
1343                            ti_bulk_out_callback, tport);
1344
1345         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1346         if (result) {
1347                 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1348                                                         __func__, result);
1349                 tport->tp_write_urb_in_use = 0;
1350                 /* TODO: reschedule ti_send */
1351         } else {
1352                 spin_lock_irqsave(&tport->tp_lock, flags);
1353                 tport->tp_icount.tx += count;
1354                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1355         }
1356
1357         /* more room in the buffer for new writes, wakeup */
1358         if (tty)
1359                 tty_wakeup(tty);
1360         tty_kref_put(tty);
1361         wake_up_interruptible(&tport->tp_write_wait);
1362         return;
1363 unlock:
1364         spin_unlock_irqrestore(&tport->tp_lock, flags);
1365         tty_kref_put(tty);
1366         return;
1367 }
1368
1369
1370 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1371 {
1372         unsigned long flags;
1373         int status;
1374
1375         status = ti_write_byte(tport->tp_tdev,
1376                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1377                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1378
1379         spin_lock_irqsave(&tport->tp_lock, flags);
1380         if (!status)
1381                 tport->tp_shadow_mcr = mcr;
1382         spin_unlock_irqrestore(&tport->tp_lock, flags);
1383
1384         return status;
1385 }
1386
1387
1388 static int ti_get_lsr(struct ti_port *tport)
1389 {
1390         int size, status;
1391         struct ti_device *tdev = tport->tp_tdev;
1392         struct usb_serial_port *port = tport->tp_port;
1393         int port_number = port->number - port->serial->minor;
1394         struct ti_port_status *data;
1395
1396         dbg("%s - port %d", __func__, port->number);
1397
1398         size = sizeof(struct ti_port_status);
1399         data = kmalloc(size, GFP_KERNEL);
1400         if (!data) {
1401                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1402                 return -ENOMEM;
1403         }
1404
1405         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1406                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1407         if (status) {
1408                 dev_err(&port->dev,
1409                         "%s - get port status command failed, %d\n",
1410                                                         __func__, status);
1411                 goto free_data;
1412         }
1413
1414         dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1415
1416         tport->tp_lsr = data->bLSR;
1417
1418 free_data:
1419         kfree(data);
1420         return status;
1421 }
1422
1423
1424 static int ti_get_serial_info(struct ti_port *tport,
1425         struct serial_struct __user *ret_arg)
1426 {
1427         struct usb_serial_port *port = tport->tp_port;
1428         struct serial_struct ret_serial;
1429
1430         if (!ret_arg)
1431                 return -EFAULT;
1432
1433         memset(&ret_serial, 0, sizeof(ret_serial));
1434
1435         ret_serial.type = PORT_16550A;
1436         ret_serial.line = port->serial->minor;
1437         ret_serial.port = port->number - port->serial->minor;
1438         ret_serial.flags = tport->tp_flags;
1439         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1440         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1441         ret_serial.closing_wait = tport->tp_closing_wait;
1442
1443         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1444                 return -EFAULT;
1445
1446         return 0;
1447 }
1448
1449
1450 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1451         struct serial_struct __user *new_arg)
1452 {
1453         struct serial_struct new_serial;
1454
1455         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1456                 return -EFAULT;
1457
1458         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1459         tport->tp_closing_wait = new_serial.closing_wait;
1460
1461         return 0;
1462 }
1463
1464
1465 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1466 {
1467         struct async_icount *icount;
1468         struct tty_struct *tty;
1469         unsigned long flags;
1470
1471         dbg("%s - msr 0x%02X", __func__, msr);
1472
1473         if (msr & TI_MSR_DELTA_MASK) {
1474                 spin_lock_irqsave(&tport->tp_lock, flags);
1475                 icount = &tport->tp_icount;
1476                 if (msr & TI_MSR_DELTA_CTS)
1477                         icount->cts++;
1478                 if (msr & TI_MSR_DELTA_DSR)
1479                         icount->dsr++;
1480                 if (msr & TI_MSR_DELTA_CD)
1481                         icount->dcd++;
1482                 if (msr & TI_MSR_DELTA_RI)
1483                         icount->rng++;
1484                 wake_up_interruptible(&tport->tp_msr_wait);
1485                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1486         }
1487
1488         tport->tp_msr = msr & TI_MSR_MASK;
1489
1490         /* handle CTS flow control */
1491         tty = tty_port_tty_get(&tport->tp_port->port);
1492         if (tty && C_CRTSCTS(tty)) {
1493                 if (msr & TI_MSR_CTS) {
1494                         tty->hw_stopped = 0;
1495                         tty_wakeup(tty);
1496                 } else {
1497                         tty->hw_stopped = 1;
1498                 }
1499         }
1500         tty_kref_put(tty);
1501 }
1502
1503
1504 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1505 {
1506         struct ti_device *tdev = tport->tp_tdev;
1507         struct usb_serial_port *port = tport->tp_port;
1508         wait_queue_t wait;
1509
1510         dbg("%s - port %d", __func__, port->number);
1511
1512         spin_lock_irq(&tport->tp_lock);
1513
1514         /* wait for data to drain from the buffer */
1515         tdev->td_urb_error = 0;
1516         init_waitqueue_entry(&wait, current);
1517         add_wait_queue(&tport->tp_write_wait, &wait);
1518         for (;;) {
1519                 set_current_state(TASK_INTERRUPTIBLE);
1520                 if (kfifo_len(&tport->write_fifo) == 0
1521                 || timeout == 0 || signal_pending(current)
1522                 || tdev->td_urb_error
1523                 || port->serial->disconnected)  /* disconnect */
1524                         break;
1525                 spin_unlock_irq(&tport->tp_lock);
1526                 timeout = schedule_timeout(timeout);
1527                 spin_lock_irq(&tport->tp_lock);
1528         }
1529         set_current_state(TASK_RUNNING);
1530         remove_wait_queue(&tport->tp_write_wait, &wait);
1531
1532         /* flush any remaining data in the buffer */
1533         if (flush)
1534                 kfifo_reset_out(&tport->write_fifo);
1535
1536         spin_unlock_irq(&tport->tp_lock);
1537
1538         mutex_lock(&port->serial->disc_mutex);
1539         /* wait for data to drain from the device */
1540         /* wait for empty tx register, plus 20 ms */
1541         timeout += jiffies;
1542         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1543         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1544         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1545         && !port->serial->disconnected) {
1546                 if (ti_get_lsr(tport))
1547                         break;
1548                 mutex_unlock(&port->serial->disc_mutex);
1549                 msleep_interruptible(20);
1550                 mutex_lock(&port->serial->disc_mutex);
1551         }
1552         mutex_unlock(&port->serial->disc_mutex);
1553 }
1554
1555
1556 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1557 {
1558         unsigned long flags;
1559
1560         spin_lock_irqsave(&tport->tp_lock, flags);
1561
1562         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1563                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1564
1565         spin_unlock_irqrestore(&tport->tp_lock, flags);
1566 }
1567
1568
1569 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1570 {
1571         struct urb *urb;
1572         int status = 0;
1573         unsigned long flags;
1574
1575         spin_lock_irqsave(&tport->tp_lock, flags);
1576
1577         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1578                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1579                 urb = tport->tp_port->read_urb;
1580                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1581                 urb->complete = ti_bulk_in_callback;
1582                 urb->context = tport;
1583                 urb->dev = tport->tp_port->serial->dev;
1584                 status = usb_submit_urb(urb, GFP_KERNEL);
1585         } else  {
1586                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1587                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1588         }
1589
1590         return status;
1591 }
1592
1593
1594 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1595         __u16 moduleid, __u16 value, __u8 *data, int size)
1596 {
1597         int status;
1598
1599         status = usb_control_msg(tdev->td_serial->dev,
1600                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1601                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1602                 value, moduleid, data, size, 1000);
1603
1604         if (status == size)
1605                 status = 0;
1606
1607         if (status > 0)
1608                 status = -ECOMM;
1609
1610         return status;
1611 }
1612
1613
1614 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1615         __u16 moduleid, __u16 value, __u8 *data, int size)
1616 {
1617         int status;
1618
1619         status = usb_control_msg(tdev->td_serial->dev,
1620                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1621                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1622                 value, moduleid, data, size, 1000);
1623
1624         if (status == size)
1625                 status = 0;
1626
1627         if (status > 0)
1628                 status = -ECOMM;
1629
1630         return status;
1631 }
1632
1633
1634 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1635         __u8 mask, __u8 byte)
1636 {
1637         int status;
1638         unsigned int size;
1639         struct ti_write_data_bytes *data;
1640         struct device *dev = &tdev->td_serial->dev->dev;
1641
1642         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1643                                         __func__, addr, mask, byte);
1644
1645         size = sizeof(struct ti_write_data_bytes) + 2;
1646         data = kmalloc(size, GFP_KERNEL);
1647         if (!data) {
1648                 dev_err(dev, "%s - out of memory\n", __func__);
1649                 return -ENOMEM;
1650         }
1651
1652         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1653         data->bDataType = TI_RW_DATA_BYTE;
1654         data->bDataCounter = 1;
1655         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1656         data->wBaseAddrLo = cpu_to_be16(addr);
1657         data->bData[0] = mask;
1658         data->bData[1] = byte;
1659
1660         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1661                 (__u8 *)data, size);
1662
1663         if (status < 0)
1664                 dev_err(dev, "%s - failed, %d\n", __func__, status);
1665
1666         kfree(data);
1667
1668         return status;
1669 }
1670
1671 static int ti_do_download(struct usb_device *dev, int pipe,
1672                                                 u8 *buffer, int size)
1673 {
1674         int pos;
1675         u8 cs = 0;
1676         int done;
1677         struct ti_firmware_header *header;
1678         int status = 0;
1679         int len;
1680
1681         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1682                 cs = (__u8)(cs + buffer[pos]);
1683
1684         header = (struct ti_firmware_header *)buffer;
1685         header->wLength = cpu_to_le16((__u16)(size
1686                                         - sizeof(struct ti_firmware_header)));
1687         header->bCheckSum = cs;
1688
1689         dbg("%s - downloading firmware", __func__);
1690         for (pos = 0; pos < size; pos += done) {
1691                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1692                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1693                                                                 &done, 1000);
1694                 if (status)
1695                         break;
1696         }
1697         return status;
1698 }
1699
1700 static int ti_download_firmware(struct ti_device *tdev)
1701 {
1702         int status;
1703         int buffer_size;
1704         __u8 *buffer;
1705         struct usb_device *dev = tdev->td_serial->dev;
1706         unsigned int pipe = usb_sndbulkpipe(dev,
1707                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1708         const struct firmware *fw_p;
1709         char buf[32];
1710
1711         dbg("%s\n", __func__);
1712         /* try ID specific firmware first, then try generic firmware */
1713         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1714             dev->descriptor.idProduct);
1715         if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1716                 buf[0] = '\0';
1717                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1718                         switch (dev->descriptor.idProduct) {
1719                         case MTS_CDMA_PRODUCT_ID:
1720                                 strcpy(buf, "mts_cdma.fw");
1721                                 break;
1722                         case MTS_GSM_PRODUCT_ID:
1723                                 strcpy(buf, "mts_gsm.fw");
1724                                 break;
1725                         case MTS_EDGE_PRODUCT_ID:
1726                                 strcpy(buf, "mts_edge.fw");
1727                                 break;
1728                         case MTS_MT9234MU_PRODUCT_ID:
1729                                 strcpy(buf, "mts_mt9234mu.fw");
1730                                 break;
1731                         case MTS_MT9234ZBA_PRODUCT_ID:
1732                                 strcpy(buf, "mts_mt9234zba.fw");
1733                                 break;
1734                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1735                                 strcpy(buf, "mts_mt9234zba.fw");
1736                                 break;                  }
1737                 }
1738                 if (buf[0] == '\0') {
1739                         if (tdev->td_is_3410)
1740                                 strcpy(buf, "ti_3410.fw");
1741                         else
1742                                 strcpy(buf, "ti_5052.fw");
1743                 }
1744                 status = request_firmware(&fw_p, buf, &dev->dev);
1745         }
1746         if (status) {
1747                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1748                 return -ENOENT;
1749         }
1750         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1751                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1752                 release_firmware(fw_p);
1753                 return -ENOENT;
1754         }
1755
1756         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1757         buffer = kmalloc(buffer_size, GFP_KERNEL);
1758         if (buffer) {
1759                 memcpy(buffer, fw_p->data, fw_p->size);
1760                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1761                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1762                 kfree(buffer);
1763         } else {
1764                 dbg("%s ENOMEM\n", __func__);
1765                 status = -ENOMEM;
1766         }
1767         release_firmware(fw_p);
1768         if (status) {
1769                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1770                                                         __func__, status);
1771                 return status;
1772         }
1773
1774         dbg("%s - download successful", __func__);
1775
1776         return 0;
1777 }