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_write_wait;
  79         struct ti_device        *tp_tdev;
  80         struct usb_serial_port  *tp_port;
  81         spinlock_t              tp_lock;
  82         int                     tp_read_urb_state;
  83         int                     tp_write_urb_in_use;
  84         struct kfifo            write_fifo;
  85 };
  86
  87 struct ti_device {
  88         struct mutex            td_open_close_lock;
  89         int                     td_open_port_count;
  90         struct usb_serial       *td_serial;
  91         int                     td_is_3410;
  92         int                     td_urb_error;
  93 };
  94
  95
  96 /* Function Declarations */
  97
  98 static int ti_startup(struct usb_serial *serial);
  99 static void ti_release(struct usb_serial *serial);
 100 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
 101 static void ti_close(struct usb_serial_port *port);
 102 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 103                 const unsigned char *data, int count);
 104 static int ti_write_room(struct tty_struct *tty);
 105 static int ti_chars_in_buffer(struct tty_struct *tty);
 106 static void ti_throttle(struct tty_struct *tty);
 107 static void ti_unthrottle(struct tty_struct *tty);
 108 static int ti_ioctl(struct tty_struct *tty,
 109                 unsigned int cmd, unsigned long arg);
 110 static int ti_get_icount(struct tty_struct *tty,
 111                 struct serial_icounter_struct *icount);
 112 static void ti_set_termios(struct tty_struct *tty,
 113                 struct usb_serial_port *port, struct ktermios *old_termios);
 114 static int ti_tiocmget(struct tty_struct *tty);
 115 static int ti_tiocmset(struct tty_struct *tty,
 116                 unsigned int set, unsigned int clear);
 117 static void ti_break(struct tty_struct *tty, int break_state);
 118 static void ti_interrupt_callback(struct urb *urb);
 119 static void ti_bulk_in_callback(struct urb *urb);
 120 static void ti_bulk_out_callback(struct urb *urb);
 121
 122 static void ti_recv(struct device *dev, struct tty_struct *tty,
 123         unsigned char *data, int length);
 124 static void ti_send(struct ti_port *tport);
 125 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 126 static int ti_get_lsr(struct ti_port *tport);
 127 static int ti_get_serial_info(struct ti_port *tport,
 128         struct serial_struct __user *ret_arg);
 129 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 130         struct serial_struct __user *new_arg);
 131 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 132
 133 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
 134
 135 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 136 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 137
 138 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 139         __u16 moduleid, __u16 value, __u8 *data, int size);
 140 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 141         __u16 moduleid, __u16 value, __u8 *data, int size);
 142
 143 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
 144         __u8 mask, __u8 byte);
 145
 146 static int ti_download_firmware(struct ti_device *tdev);
 147
 148
 149 /* Data */
 150
 151 /* module parameters */
 152 static int debug;
 153 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 154 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
 155 static unsigned int vendor_3410_count;
 156 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
 157 static unsigned int product_3410_count;
 158 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
 159 static unsigned int vendor_5052_count;
 160 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
 161 static unsigned int product_5052_count;
 162
 163 /* supported devices */
 164 /* the array dimension is the number of default entries plus */
 165 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
 166 /* null entry */
 167 static struct usb_device_id ti_id_table_3410[15+TI_EXTRA_VID_PID_COUNT+1] = {
 168         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 169         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 170         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 171         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 172         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 173         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 174         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 175         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 176         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 177         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 178         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 179         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 180         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 181         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STEREO_PLUG_ID) },
 182         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_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 (serial->type == &ti_1port_device)
 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_write_wait);
 451                 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
 452                                                                 GFP_KERNEL)) {
 453                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 454                         kfree(tport);
 455                         status = -ENOMEM;
 456                         goto free_tports;
 457                 }
 458                 tport->tp_port = serial->port[i];
 459                 tport->tp_tdev = tdev;
 460                 usb_set_serial_port_data(serial->port[i], tport);
 461                 tport->tp_uart_mode = 0;        /* default is RS232 */
 462         }
 463
 464         return 0;
 465
 466 free_tports:
 467         for (--i; i >= 0; --i) {
 468                 tport = usb_get_serial_port_data(serial->port[i]);
 469                 kfifo_free(&tport->write_fifo);
 470                 kfree(tport);
 471                 usb_set_serial_port_data(serial->port[i], NULL);
 472         }
 473 free_tdev:
 474         kfree(tdev);
 475         usb_set_serial_data(serial, NULL);
 476         return status;
 477 }
 478
 479
 480 static void ti_release(struct usb_serial *serial)
 481 {
 482         int i;
 483         struct ti_device *tdev = usb_get_serial_data(serial);
 484         struct ti_port *tport;
 485
 486         dbg("%s", __func__);
 487
 488         for (i = 0; i < serial->num_ports; ++i) {
 489                 tport = usb_get_serial_port_data(serial->port[i]);
 490                 if (tport) {
 491                         kfifo_free(&tport->write_fifo);
 492                         kfree(tport);
 493                 }
 494         }
 495
 496         kfree(tdev);
 497 }
 498
 499
 500 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 501 {
 502         struct ti_port *tport = usb_get_serial_port_data(port);
 503         struct ti_device *tdev;
 504         struct usb_device *dev;
 505         struct urb *urb;
 506         int port_number;
 507         int status;
 508         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 509                              TI_PIPE_TIMEOUT_ENABLE |
 510                              (TI_TRANSFER_TIMEOUT << 2));
 511
 512         dbg("%s - port %d", __func__, port->number);
 513
 514         if (tport == NULL)
 515                 return -ENODEV;
 516
 517         dev = port->serial->dev;
 518         tdev = tport->tp_tdev;
 519
 520         /* only one open on any port on a device at a time */
 521         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 522                 return -ERESTARTSYS;
 523
 524         port_number = port->number - port->serial->minor;
 525
 526         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 527
 528         tport->tp_msr = 0;
 529         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 530
 531         /* start interrupt urb the first time a port is opened on this device */
 532         if (tdev->td_open_port_count == 0) {
 533                 dbg("%s - start interrupt in urb", __func__);
 534                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 535                 if (!urb) {
 536                         dev_err(&port->dev, "%s - no interrupt urb\n",
 537                                                                 __func__);
 538                         status = -EINVAL;
 539                         goto release_lock;
 540                 }
 541                 urb->complete = ti_interrupt_callback;
 542                 urb->context = tdev;
 543                 urb->dev = dev;
 544                 status = usb_submit_urb(urb, GFP_KERNEL);
 545                 if (status) {
 546                         dev_err(&port->dev,
 547                                 "%s - submit interrupt urb failed, %d\n",
 548                                         __func__, status);
 549                         goto release_lock;
 550                 }
 551         }
 552
 553         if (tty)
 554                 ti_set_termios(tty, port, tty->termios);
 555
 556         dbg("%s - sending TI_OPEN_PORT", __func__);
 557         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 558                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 559         if (status) {
 560                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 561                                                         __func__, status);
 562                 goto unlink_int_urb;
 563         }
 564
 565         dbg("%s - sending TI_START_PORT", __func__);
 566         status = ti_command_out_sync(tdev, TI_START_PORT,
 567                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 568         if (status) {
 569                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 570                                                         __func__, status);
 571                 goto unlink_int_urb;
 572         }
 573
 574         dbg("%s - sending TI_PURGE_PORT", __func__);
 575         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 576                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 577         if (status) {
 578                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 579                                                         __func__, status);
 580                 goto unlink_int_urb;
 581         }
 582         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 583                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 584         if (status) {
 585                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 586                                                         __func__, status);
 587                 goto unlink_int_urb;
 588         }
 589
 590         /* reset the data toggle on the bulk endpoints to work around bug in
 591          * host controllers where things get out of sync some times */
 592         usb_clear_halt(dev, port->write_urb->pipe);
 593         usb_clear_halt(dev, port->read_urb->pipe);
 594
 595         if (tty)
 596                 ti_set_termios(tty, port, tty->termios);
 597
 598         dbg("%s - sending TI_OPEN_PORT (2)", __func__);
 599         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 600                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 601         if (status) {
 602                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 603                                                         __func__, status);
 604                 goto unlink_int_urb;
 605         }
 606
 607         dbg("%s - sending TI_START_PORT (2)", __func__);
 608         status = ti_command_out_sync(tdev, TI_START_PORT,
 609                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 610         if (status) {
 611                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 612                                                         __func__, status);
 613                 goto unlink_int_urb;
 614         }
 615
 616         /* start read urb */
 617         dbg("%s - start read urb", __func__);
 618         urb = port->read_urb;
 619         if (!urb) {
 620                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 621                 status = -EINVAL;
 622                 goto unlink_int_urb;
 623         }
 624         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 625         urb->complete = ti_bulk_in_callback;
 626         urb->context = tport;
 627         urb->dev = dev;
 628         status = usb_submit_urb(urb, GFP_KERNEL);
 629         if (status) {
 630                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 631                                                         __func__, status);
 632                 goto unlink_int_urb;
 633         }
 634
 635         tport->tp_is_open = 1;
 636         ++tdev->td_open_port_count;
 637
 638         goto release_lock;
 639
 640 unlink_int_urb:
 641         if (tdev->td_open_port_count == 0)
 642                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 643 release_lock:
 644         mutex_unlock(&tdev->td_open_close_lock);
 645         dbg("%s - exit %d", __func__, status);
 646         return status;
 647 }
 648
 649
 650 static void ti_close(struct usb_serial_port *port)
 651 {
 652         struct ti_device *tdev;
 653         struct ti_port *tport;
 654         int port_number;
 655         int status;
 656         int do_unlock;
 657
 658         dbg("%s - port %d", __func__, port->number);
 659
 660         tdev = usb_get_serial_data(port->serial);
 661         tport = usb_get_serial_port_data(port);
 662         if (tdev == NULL || tport == NULL)
 663                 return;
 664
 665         tport->tp_is_open = 0;
 666
 667         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 668
 669         usb_kill_urb(port->read_urb);
 670         usb_kill_urb(port->write_urb);
 671         tport->tp_write_urb_in_use = 0;
 672
 673         port_number = port->number - port->serial->minor;
 674
 675         dbg("%s - sending TI_CLOSE_PORT", __func__);
 676         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 677                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 678         if (status)
 679                 dev_err(&port->dev,
 680                         "%s - cannot send close port command, %d\n"
 681                                                         , __func__, status);
 682
 683         /* if mutex_lock is interrupted, continue anyway */
 684         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 685         --tport->tp_tdev->td_open_port_count;
 686         if (tport->tp_tdev->td_open_port_count <= 0) {
 687                 /* last port is closed, shut down interrupt urb */
 688                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 689                 tport->tp_tdev->td_open_port_count = 0;
 690         }
 691         if (do_unlock)
 692                 mutex_unlock(&tdev->td_open_close_lock);
 693
 694         dbg("%s - exit", __func__);
 695 }
 696
 697
 698 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 699                         const unsigned char *data, int count)
 700 {
 701         struct ti_port *tport = usb_get_serial_port_data(port);
 702
 703         dbg("%s - port %d", __func__, port->number);
 704
 705         if (count == 0) {
 706                 dbg("%s - write request of 0 bytes", __func__);
 707                 return 0;
 708         }
 709
 710         if (tport == NULL || !tport->tp_is_open)
 711                 return -ENODEV;
 712
 713         count = kfifo_in_locked(&tport->write_fifo, data, count,
 714                                                         &tport->tp_lock);
 715         ti_send(tport);
 716
 717         return count;
 718 }
 719
 720
 721 static int ti_write_room(struct tty_struct *tty)
 722 {
 723         struct usb_serial_port *port = tty->driver_data;
 724         struct ti_port *tport = usb_get_serial_port_data(port);
 725         int room = 0;
 726         unsigned long flags;
 727
 728         dbg("%s - port %d", __func__, port->number);
 729
 730         if (tport == NULL)
 731                 return 0;
 732
 733         spin_lock_irqsave(&tport->tp_lock, flags);
 734         room = kfifo_avail(&tport->write_fifo);
 735         spin_unlock_irqrestore(&tport->tp_lock, flags);
 736
 737         dbg("%s - returns %d", __func__, room);
 738         return room;
 739 }
 740
 741
 742 static int ti_chars_in_buffer(struct tty_struct *tty)
 743 {
 744         struct usb_serial_port *port = tty->driver_data;
 745         struct ti_port *tport = usb_get_serial_port_data(port);
 746         int chars = 0;
 747         unsigned long flags;
 748
 749         dbg("%s - port %d", __func__, port->number);
 750
 751         if (tport == NULL)
 752                 return 0;
 753
 754         spin_lock_irqsave(&tport->tp_lock, flags);
 755         chars = kfifo_len(&tport->write_fifo);
 756         spin_unlock_irqrestore(&tport->tp_lock, flags);
 757
 758         dbg("%s - returns %d", __func__, chars);
 759         return chars;
 760 }
 761
 762
 763 static void ti_throttle(struct tty_struct *tty)
 764 {
 765         struct usb_serial_port *port = tty->driver_data;
 766         struct ti_port *tport = usb_get_serial_port_data(port);
 767
 768         dbg("%s - port %d", __func__, port->number);
 769
 770         if (tport == NULL)
 771                 return;
 772
 773         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 774                 ti_stop_read(tport, tty);
 775
 776 }
 777
 778
 779 static void ti_unthrottle(struct tty_struct *tty)
 780 {
 781         struct usb_serial_port *port = tty->driver_data;
 782         struct ti_port *tport = usb_get_serial_port_data(port);
 783         int status;
 784
 785         dbg("%s - port %d", __func__, port->number);
 786
 787         if (tport == NULL)
 788                 return;
 789
 790         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 791                 status = ti_restart_read(tport, tty);
 792                 if (status)
 793                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 794                                                         __func__, status);
 795         }
 796 }
 797
 798 static int ti_get_icount(struct tty_struct *tty,
 799                 struct serial_icounter_struct *icount)
 800 {
 801         struct usb_serial_port *port = tty->driver_data;
 802         struct ti_port *tport = usb_get_serial_port_data(port);
 803         struct async_icount cnow = tport->tp_icount;
 804
 805         dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
 806                 __func__, port->number,
 807                 cnow.rx, cnow.tx);
 808
 809         icount->cts = cnow.cts;
 810         icount->dsr = cnow.dsr;
 811         icount->rng = cnow.rng;
 812         icount->dcd = cnow.dcd;
 813         icount->rx = cnow.rx;
 814         icount->tx = cnow.tx;
 815         icount->frame = cnow.frame;
 816         icount->overrun = cnow.overrun;
 817         icount->parity = cnow.parity;
 818         icount->brk = cnow.brk;
 819         icount->buf_overrun = cnow.buf_overrun;
 820
 821         return 0;
 822 }
 823
 824 static int ti_ioctl(struct tty_struct *tty,
 825         unsigned int cmd, unsigned long arg)
 826 {
 827         struct usb_serial_port *port = tty->driver_data;
 828         struct ti_port *tport = usb_get_serial_port_data(port);
 829         struct async_icount cnow;
 830         struct async_icount cprev;
 831
 832         dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
 833
 834         if (tport == NULL)
 835                 return -ENODEV;
 836
 837         switch (cmd) {
 838         case TIOCGSERIAL:
 839                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
 840                 return ti_get_serial_info(tport,
 841                                 (struct serial_struct __user *)arg);
 842         case TIOCSSERIAL:
 843                 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
 844                 return ti_set_serial_info(tty, tport,
 845                                 (struct serial_struct __user *)arg);
 846         case TIOCMIWAIT:
 847                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
 848                 cprev = tport->tp_icount;
 849                 while (1) {
 850                         interruptible_sleep_on(&port->delta_msr_wait);
 851                         if (signal_pending(current))
 852                                 return -ERESTARTSYS;
 853
 854                         if (port->serial->disconnected)
 855                                 return -EIO;
 856
 857                         cnow = tport->tp_icount;
 858                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 859                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 860                                 return -EIO; /* no change => error */
 861                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 862                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 863                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 864                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
 865                                 return 0;
 866                         cprev = cnow;
 867                 }
 868                 break;
 869         }
 870         return -ENOIOCTLCMD;
 871 }
 872
 873
 874 static void ti_set_termios(struct tty_struct *tty,
 875                 struct usb_serial_port *port, struct ktermios *old_termios)
 876 {
 877         struct ti_port *tport = usb_get_serial_port_data(port);
 878         struct ti_uart_config *config;
 879         tcflag_t cflag, iflag;
 880         int baud;
 881         int status;
 882         int port_number = port->number - port->serial->minor;
 883         unsigned int mcr;
 884
 885         dbg("%s - port %d", __func__, port->number);
 886
 887         cflag = tty->termios->c_cflag;
 888         iflag = tty->termios->c_iflag;
 889
 890         dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
 891         dbg("%s - old clfag %08x, old iflag %08x", __func__,
 892                                 old_termios->c_cflag, old_termios->c_iflag);
 893
 894         if (tport == NULL)
 895                 return;
 896
 897         config = kmalloc(sizeof(*config), GFP_KERNEL);
 898         if (!config) {
 899                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 900                 return;
 901         }
 902
 903         config->wFlags = 0;
 904
 905         /* these flags must be set */
 906         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 907         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 908         config->bUartMode = (__u8)(tport->tp_uart_mode);
 909
 910         switch (cflag & CSIZE) {
 911         case CS5:
 912                     config->bDataBits = TI_UART_5_DATA_BITS;
 913                     break;
 914         case CS6:
 915                     config->bDataBits = TI_UART_6_DATA_BITS;
 916                     break;
 917         case CS7:
 918                     config->bDataBits = TI_UART_7_DATA_BITS;
 919                     break;
 920         default:
 921         case CS8:
 922                     config->bDataBits = TI_UART_8_DATA_BITS;
 923                     break;
 924         }
 925
 926         /* CMSPAR isn't supported by this driver */
 927         tty->termios->c_cflag &= ~CMSPAR;
 928
 929         if (cflag & PARENB) {
 930                 if (cflag & PARODD) {
 931                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 932                         config->bParity = TI_UART_ODD_PARITY;
 933                 } else {
 934                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 935                         config->bParity = TI_UART_EVEN_PARITY;
 936                 }
 937         } else {
 938                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 939                 config->bParity = TI_UART_NO_PARITY;
 940         }
 941
 942         if (cflag & CSTOPB)
 943                 config->bStopBits = TI_UART_2_STOP_BITS;
 944         else
 945                 config->bStopBits = TI_UART_1_STOP_BITS;
 946
 947         if (cflag & CRTSCTS) {
 948                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 949                 if ((cflag & CBAUD) != B0)
 950                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 951                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 952         } else {
 953                 tty->hw_stopped = 0;
 954                 ti_restart_read(tport, tty);
 955         }
 956
 957         if (I_IXOFF(tty) || I_IXON(tty)) {
 958                 config->cXon  = START_CHAR(tty);
 959                 config->cXoff = STOP_CHAR(tty);
 960
 961                 if (I_IXOFF(tty))
 962                         config->wFlags |= TI_UART_ENABLE_X_IN;
 963                 else
 964                         ti_restart_read(tport, tty);
 965
 966                 if (I_IXON(tty))
 967                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 968         }
 969
 970         baud = tty_get_baud_rate(tty);
 971         if (!baud)
 972                 baud = 9600;
 973         if (tport->tp_tdev->td_is_3410)
 974                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 975         else
 976                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 977
 978         /* FIXME: Should calculate resulting baud here and report it back */
 979         if ((cflag & CBAUD) != B0)
 980                 tty_encode_baud_rate(tty, baud, baud);
 981
 982         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 983         __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
 984
 985         cpu_to_be16s(&config->wBaudRate);
 986         cpu_to_be16s(&config->wFlags);
 987
 988         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 989                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 990                 sizeof(*config));
 991         if (status)
 992                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 993                                         __func__, port_number, status);
 994
 995         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 996         mcr = tport->tp_shadow_mcr;
 997         /* if baud rate is B0, clear RTS and DTR */
 998         if ((cflag & CBAUD) == B0)
 999                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1000         status = ti_set_mcr(tport, mcr);
1001         if (status)
1002                 dev_err(&port->dev,
1003                         "%s - cannot set modem control on port %d, %d\n",
1004                                                 __func__, port_number, status);
1005
1006         kfree(config);
1007 }
1008
1009
1010 static int ti_tiocmget(struct tty_struct *tty)
1011 {
1012         struct usb_serial_port *port = tty->driver_data;
1013         struct ti_port *tport = usb_get_serial_port_data(port);
1014         unsigned int result;
1015         unsigned int msr;
1016         unsigned int mcr;
1017         unsigned long flags;
1018
1019         dbg("%s - port %d", __func__, port->number);
1020
1021         if (tport == NULL)
1022                 return -ENODEV;
1023
1024         spin_lock_irqsave(&tport->tp_lock, flags);
1025         msr = tport->tp_msr;
1026         mcr = tport->tp_shadow_mcr;
1027         spin_unlock_irqrestore(&tport->tp_lock, flags);
1028
1029         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1030                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1031                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1032                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1033                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1034                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1035                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1036
1037         dbg("%s - 0x%04X", __func__, result);
1038
1039         return result;
1040 }
1041
1042
1043 static int ti_tiocmset(struct tty_struct *tty,
1044                                 unsigned int set, unsigned int clear)
1045 {
1046         struct usb_serial_port *port = tty->driver_data;
1047         struct ti_port *tport = usb_get_serial_port_data(port);
1048         unsigned int mcr;
1049         unsigned long flags;
1050
1051         dbg("%s - port %d", __func__, port->number);
1052
1053         if (tport == NULL)
1054                 return -ENODEV;
1055
1056         spin_lock_irqsave(&tport->tp_lock, flags);
1057         mcr = tport->tp_shadow_mcr;
1058
1059         if (set & TIOCM_RTS)
1060                 mcr |= TI_MCR_RTS;
1061         if (set & TIOCM_DTR)
1062                 mcr |= TI_MCR_DTR;
1063         if (set & TIOCM_LOOP)
1064                 mcr |= TI_MCR_LOOP;
1065
1066         if (clear & TIOCM_RTS)
1067                 mcr &= ~TI_MCR_RTS;
1068         if (clear & TIOCM_DTR)
1069                 mcr &= ~TI_MCR_DTR;
1070         if (clear & TIOCM_LOOP)
1071                 mcr &= ~TI_MCR_LOOP;
1072         spin_unlock_irqrestore(&tport->tp_lock, flags);
1073
1074         return ti_set_mcr(tport, mcr);
1075 }
1076
1077
1078 static void ti_break(struct tty_struct *tty, int break_state)
1079 {
1080         struct usb_serial_port *port = tty->driver_data;
1081         struct ti_port *tport = usb_get_serial_port_data(port);
1082         int status;
1083
1084         dbg("%s - state = %d", __func__, break_state);
1085
1086         if (tport == NULL)
1087                 return;
1088
1089         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1090
1091         status = ti_write_byte(tport->tp_tdev,
1092                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1093                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1094
1095         if (status)
1096                 dbg("%s - error setting break, %d", __func__, status);
1097 }
1098
1099
1100 static void ti_interrupt_callback(struct urb *urb)
1101 {
1102         struct ti_device *tdev = urb->context;
1103         struct usb_serial_port *port;
1104         struct usb_serial *serial = tdev->td_serial;
1105         struct ti_port *tport;
1106         struct device *dev = &urb->dev->dev;
1107         unsigned char *data = urb->transfer_buffer;
1108         int length = urb->actual_length;
1109         int port_number;
1110         int function;
1111         int status = urb->status;
1112         int retval;
1113         __u8 msr;
1114
1115         dbg("%s", __func__);
1116
1117         switch (status) {
1118         case 0:
1119                 break;
1120         case -ECONNRESET:
1121         case -ENOENT:
1122         case -ESHUTDOWN:
1123                 dbg("%s - urb shutting down, %d", __func__, status);
1124                 tdev->td_urb_error = 1;
1125                 return;
1126         default:
1127                 dev_err(dev, "%s - nonzero urb status, %d\n",
1128                         __func__, status);
1129                 tdev->td_urb_error = 1;
1130                 goto exit;
1131         }
1132
1133         if (length != 2) {
1134                 dbg("%s - bad packet size, %d", __func__, length);
1135                 goto exit;
1136         }
1137
1138         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1139                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1140                 goto exit;
1141         }
1142
1143         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1144         function = TI_GET_FUNC_FROM_CODE(data[0]);
1145
1146         dbg("%s - port_number %d, function %d, data 0x%02X",
1147                                 __func__, port_number, function, data[1]);
1148
1149         if (port_number >= serial->num_ports) {
1150                 dev_err(dev, "%s - bad port number, %d\n",
1151                                                 __func__, port_number);
1152                 goto exit;
1153         }
1154
1155         port = serial->port[port_number];
1156
1157         tport = usb_get_serial_port_data(port);
1158         if (!tport)
1159                 goto exit;
1160
1161         switch (function) {
1162         case TI_CODE_DATA_ERROR:
1163                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1164                                         __func__, port_number, data[1]);
1165                 break;
1166
1167         case TI_CODE_MODEM_STATUS:
1168                 msr = data[1];
1169                 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1170                 ti_handle_new_msr(tport, msr);
1171                 break;
1172
1173         default:
1174                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1175                                                         __func__, data[1]);
1176                 break;
1177         }
1178
1179 exit:
1180         retval = usb_submit_urb(urb, GFP_ATOMIC);
1181         if (retval)
1182                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1183                         __func__, retval);
1184 }
1185
1186
1187 static void ti_bulk_in_callback(struct urb *urb)
1188 {
1189         struct ti_port *tport = urb->context;
1190         struct usb_serial_port *port = tport->tp_port;
1191         struct device *dev = &urb->dev->dev;
1192         int status = urb->status;
1193         int retval = 0;
1194         struct tty_struct *tty;
1195
1196         dbg("%s", __func__);
1197
1198         switch (status) {
1199         case 0:
1200                 break;
1201         case -ECONNRESET:
1202         case -ENOENT:
1203         case -ESHUTDOWN:
1204                 dbg("%s - urb shutting down, %d", __func__, status);
1205                 tport->tp_tdev->td_urb_error = 1;
1206                 wake_up_interruptible(&tport->tp_write_wait);
1207                 return;
1208         default:
1209                 dev_err(dev, "%s - nonzero urb status, %d\n",
1210                         __func__, status);
1211                 tport->tp_tdev->td_urb_error = 1;
1212                 wake_up_interruptible(&tport->tp_write_wait);
1213         }
1214
1215         if (status == -EPIPE)
1216                 goto exit;
1217
1218         if (status) {
1219                 dev_err(dev, "%s - stopping read!\n", __func__);
1220                 return;
1221         }
1222
1223         tty = tty_port_tty_get(&port->port);
1224         if (tty) {
1225                 if (urb->actual_length) {
1226                         usb_serial_debug_data(debug, dev, __func__,
1227                                 urb->actual_length, urb->transfer_buffer);
1228
1229                         if (!tport->tp_is_open)
1230                                 dbg("%s - port closed, dropping data",
1231                                         __func__);
1232                         else
1233                                 ti_recv(&urb->dev->dev, tty,
1234                                                 urb->transfer_buffer,
1235                                                 urb->actual_length);
1236                         spin_lock(&tport->tp_lock);
1237                         tport->tp_icount.rx += urb->actual_length;
1238                         spin_unlock(&tport->tp_lock);
1239                 }
1240                 tty_kref_put(tty);
1241         }
1242
1243 exit:
1244         /* continue to read unless stopping */
1245         spin_lock(&tport->tp_lock);
1246         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1247                 urb->dev = port->serial->dev;
1248                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1249         } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1250                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1251         }
1252         spin_unlock(&tport->tp_lock);
1253         if (retval)
1254                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1255                         __func__, retval);
1256 }
1257
1258
1259 static void ti_bulk_out_callback(struct urb *urb)
1260 {
1261         struct ti_port *tport = urb->context;
1262         struct usb_serial_port *port = tport->tp_port;
1263         struct device *dev = &urb->dev->dev;
1264         int status = urb->status;
1265
1266         dbg("%s - port %d", __func__, port->number);
1267
1268         tport->tp_write_urb_in_use = 0;
1269
1270         switch (status) {
1271         case 0:
1272                 break;
1273         case -ECONNRESET:
1274         case -ENOENT:
1275         case -ESHUTDOWN:
1276                 dbg("%s - urb shutting down, %d", __func__, status);
1277                 tport->tp_tdev->td_urb_error = 1;
1278                 wake_up_interruptible(&tport->tp_write_wait);
1279                 return;
1280         default:
1281                 dev_err(dev, "%s - nonzero urb status, %d\n",
1282                         __func__, status);
1283                 tport->tp_tdev->td_urb_error = 1;
1284                 wake_up_interruptible(&tport->tp_write_wait);
1285         }
1286
1287         /* send any buffered data */
1288         ti_send(tport);
1289 }
1290
1291
1292 static void ti_recv(struct device *dev, struct tty_struct *tty,
1293         unsigned char *data, int length)
1294 {
1295         int cnt;
1296
1297         do {
1298                 cnt = tty_insert_flip_string(tty, data, length);
1299                 if (cnt < length) {
1300                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1301                                                 __func__, length - cnt);
1302                         if (cnt == 0)
1303                                 break;
1304                 }
1305                 tty_flip_buffer_push(tty);
1306                 data += cnt;
1307                 length -= cnt;
1308         } while (length > 0);
1309
1310 }
1311
1312
1313 static void ti_send(struct ti_port *tport)
1314 {
1315         int count, result;
1316         struct usb_serial_port *port = tport->tp_port;
1317         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1318         unsigned long flags;
1319
1320
1321         dbg("%s - port %d", __func__, port->number);
1322
1323         spin_lock_irqsave(&tport->tp_lock, flags);
1324
1325         if (tport->tp_write_urb_in_use)
1326                 goto unlock;
1327
1328         count = kfifo_out(&tport->write_fifo,
1329                                 port->write_urb->transfer_buffer,
1330                                 port->bulk_out_size);
1331
1332         if (count == 0)
1333                 goto unlock;
1334
1335         tport->tp_write_urb_in_use = 1;
1336
1337         spin_unlock_irqrestore(&tport->tp_lock, flags);
1338
1339         usb_serial_debug_data(debug, &port->dev, __func__, count,
1340                                         port->write_urb->transfer_buffer);
1341
1342         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1343                            usb_sndbulkpipe(port->serial->dev,
1344                                             port->bulk_out_endpointAddress),
1345                            port->write_urb->transfer_buffer, count,
1346                            ti_bulk_out_callback, tport);
1347
1348         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1349         if (result) {
1350                 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1351                                                         __func__, result);
1352                 tport->tp_write_urb_in_use = 0;
1353                 /* TODO: reschedule ti_send */
1354         } else {
1355                 spin_lock_irqsave(&tport->tp_lock, flags);
1356                 tport->tp_icount.tx += count;
1357                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1358         }
1359
1360         /* more room in the buffer for new writes, wakeup */
1361         if (tty)
1362                 tty_wakeup(tty);
1363         tty_kref_put(tty);
1364         wake_up_interruptible(&tport->tp_write_wait);
1365         return;
1366 unlock:
1367         spin_unlock_irqrestore(&tport->tp_lock, flags);
1368         tty_kref_put(tty);
1369         return;
1370 }
1371
1372
1373 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1374 {
1375         unsigned long flags;
1376         int status;
1377
1378         status = ti_write_byte(tport->tp_tdev,
1379                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1380                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1381
1382         spin_lock_irqsave(&tport->tp_lock, flags);
1383         if (!status)
1384                 tport->tp_shadow_mcr = mcr;
1385         spin_unlock_irqrestore(&tport->tp_lock, flags);
1386
1387         return status;
1388 }
1389
1390
1391 static int ti_get_lsr(struct ti_port *tport)
1392 {
1393         int size, status;
1394         struct ti_device *tdev = tport->tp_tdev;
1395         struct usb_serial_port *port = tport->tp_port;
1396         int port_number = port->number - port->serial->minor;
1397         struct ti_port_status *data;
1398
1399         dbg("%s - port %d", __func__, port->number);
1400
1401         size = sizeof(struct ti_port_status);
1402         data = kmalloc(size, GFP_KERNEL);
1403         if (!data) {
1404                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1405                 return -ENOMEM;
1406         }
1407
1408         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1409                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1410         if (status) {
1411                 dev_err(&port->dev,
1412                         "%s - get port status command failed, %d\n",
1413                                                         __func__, status);
1414                 goto free_data;
1415         }
1416
1417         dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1418
1419         tport->tp_lsr = data->bLSR;
1420
1421 free_data:
1422         kfree(data);
1423         return status;
1424 }
1425
1426
1427 static int ti_get_serial_info(struct ti_port *tport,
1428         struct serial_struct __user *ret_arg)
1429 {
1430         struct usb_serial_port *port = tport->tp_port;
1431         struct serial_struct ret_serial;
1432
1433         if (!ret_arg)
1434                 return -EFAULT;
1435
1436         memset(&ret_serial, 0, sizeof(ret_serial));
1437
1438         ret_serial.type = PORT_16550A;
1439         ret_serial.line = port->serial->minor;
1440         ret_serial.port = port->number - port->serial->minor;
1441         ret_serial.flags = tport->tp_flags;
1442         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1443         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1444         ret_serial.closing_wait = tport->tp_closing_wait;
1445
1446         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1447                 return -EFAULT;
1448
1449         return 0;
1450 }
1451
1452
1453 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1454         struct serial_struct __user *new_arg)
1455 {
1456         struct serial_struct new_serial;
1457
1458         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1459                 return -EFAULT;
1460
1461         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1462         tport->tp_closing_wait = new_serial.closing_wait;
1463
1464         return 0;
1465 }
1466
1467
1468 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1469 {
1470         struct async_icount *icount;
1471         struct tty_struct *tty;
1472         unsigned long flags;
1473
1474         dbg("%s - msr 0x%02X", __func__, msr);
1475
1476         if (msr & TI_MSR_DELTA_MASK) {
1477                 spin_lock_irqsave(&tport->tp_lock, flags);
1478                 icount = &tport->tp_icount;
1479                 if (msr & TI_MSR_DELTA_CTS)
1480                         icount->cts++;
1481                 if (msr & TI_MSR_DELTA_DSR)
1482                         icount->dsr++;
1483                 if (msr & TI_MSR_DELTA_CD)
1484                         icount->dcd++;
1485                 if (msr & TI_MSR_DELTA_RI)
1486                         icount->rng++;
1487                 wake_up_interruptible(&tport->tp_port->delta_msr_wait);
1488                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1489         }
1490
1491         tport->tp_msr = msr & TI_MSR_MASK;
1492
1493         /* handle CTS flow control */
1494         tty = tty_port_tty_get(&tport->tp_port->port);
1495         if (tty && C_CRTSCTS(tty)) {
1496                 if (msr & TI_MSR_CTS) {
1497                         tty->hw_stopped = 0;
1498                         tty_wakeup(tty);
1499                 } else {
1500                         tty->hw_stopped = 1;
1501                 }
1502         }
1503         tty_kref_put(tty);
1504 }
1505
1506
1507 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1508 {
1509         struct ti_device *tdev = tport->tp_tdev;
1510         struct usb_serial_port *port = tport->tp_port;
1511         wait_queue_t wait;
1512
1513         dbg("%s - port %d", __func__, port->number);
1514
1515         spin_lock_irq(&tport->tp_lock);
1516
1517         /* wait for data to drain from the buffer */
1518         tdev->td_urb_error = 0;
1519         init_waitqueue_entry(&wait, current);
1520         add_wait_queue(&tport->tp_write_wait, &wait);
1521         for (;;) {
1522                 set_current_state(TASK_INTERRUPTIBLE);
1523                 if (kfifo_len(&tport->write_fifo) == 0
1524                 || timeout == 0 || signal_pending(current)
1525                 || tdev->td_urb_error
1526                 || port->serial->disconnected)  /* disconnect */
1527                         break;
1528                 spin_unlock_irq(&tport->tp_lock);
1529                 timeout = schedule_timeout(timeout);
1530                 spin_lock_irq(&tport->tp_lock);
1531         }
1532         set_current_state(TASK_RUNNING);
1533         remove_wait_queue(&tport->tp_write_wait, &wait);
1534
1535         /* flush any remaining data in the buffer */
1536         if (flush)
1537                 kfifo_reset_out(&tport->write_fifo);
1538
1539         spin_unlock_irq(&tport->tp_lock);
1540
1541         mutex_lock(&port->serial->disc_mutex);
1542         /* wait for data to drain from the device */
1543         /* wait for empty tx register, plus 20 ms */
1544         timeout += jiffies;
1545         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1546         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1547         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1548         && !port->serial->disconnected) {
1549                 if (ti_get_lsr(tport))
1550                         break;
1551                 mutex_unlock(&port->serial->disc_mutex);
1552                 msleep_interruptible(20);
1553                 mutex_lock(&port->serial->disc_mutex);
1554         }
1555         mutex_unlock(&port->serial->disc_mutex);
1556 }
1557
1558
1559 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1560 {
1561         unsigned long flags;
1562
1563         spin_lock_irqsave(&tport->tp_lock, flags);
1564
1565         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1566                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1567
1568         spin_unlock_irqrestore(&tport->tp_lock, flags);
1569 }
1570
1571
1572 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1573 {
1574         struct urb *urb;
1575         int status = 0;
1576         unsigned long flags;
1577
1578         spin_lock_irqsave(&tport->tp_lock, flags);
1579
1580         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1581                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1582                 urb = tport->tp_port->read_urb;
1583                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1584                 urb->complete = ti_bulk_in_callback;
1585                 urb->context = tport;
1586                 urb->dev = tport->tp_port->serial->dev;
1587                 status = usb_submit_urb(urb, GFP_KERNEL);
1588         } else  {
1589                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1590                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1591         }
1592
1593         return status;
1594 }
1595
1596
1597 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1598         __u16 moduleid, __u16 value, __u8 *data, int size)
1599 {
1600         int status;
1601
1602         status = usb_control_msg(tdev->td_serial->dev,
1603                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1604                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1605                 value, moduleid, data, size, 1000);
1606
1607         if (status == size)
1608                 status = 0;
1609
1610         if (status > 0)
1611                 status = -ECOMM;
1612
1613         return status;
1614 }
1615
1616
1617 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1618         __u16 moduleid, __u16 value, __u8 *data, int size)
1619 {
1620         int status;
1621
1622         status = usb_control_msg(tdev->td_serial->dev,
1623                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1624                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1625                 value, moduleid, data, size, 1000);
1626
1627         if (status == size)
1628                 status = 0;
1629
1630         if (status > 0)
1631                 status = -ECOMM;
1632
1633         return status;
1634 }
1635
1636
1637 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1638         __u8 mask, __u8 byte)
1639 {
1640         int status;
1641         unsigned int size;
1642         struct ti_write_data_bytes *data;
1643         struct device *dev = &tdev->td_serial->dev->dev;
1644
1645         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1646                                         __func__, addr, mask, byte);
1647
1648         size = sizeof(struct ti_write_data_bytes) + 2;
1649         data = kmalloc(size, GFP_KERNEL);
1650         if (!data) {
1651                 dev_err(dev, "%s - out of memory\n", __func__);
1652                 return -ENOMEM;
1653         }
1654
1655         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1656         data->bDataType = TI_RW_DATA_BYTE;
1657         data->bDataCounter = 1;
1658         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1659         data->wBaseAddrLo = cpu_to_be16(addr);
1660         data->bData[0] = mask;
1661         data->bData[1] = byte;
1662
1663         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1664                 (__u8 *)data, size);
1665
1666         if (status < 0)
1667                 dev_err(dev, "%s - failed, %d\n", __func__, status);
1668
1669         kfree(data);
1670
1671         return status;
1672 }
1673
1674 static int ti_do_download(struct usb_device *dev, int pipe,
1675                                                 u8 *buffer, int size)
1676 {
1677         int pos;
1678         u8 cs = 0;
1679         int done;
1680         struct ti_firmware_header *header;
1681         int status = 0;
1682         int len;
1683
1684         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1685                 cs = (__u8)(cs + buffer[pos]);
1686
1687         header = (struct ti_firmware_header *)buffer;
1688         header->wLength = cpu_to_le16((__u16)(size
1689                                         - sizeof(struct ti_firmware_header)));
1690         header->bCheckSum = cs;
1691
1692         dbg("%s - downloading firmware", __func__);
1693         for (pos = 0; pos < size; pos += done) {
1694                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1695                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1696                                                                 &done, 1000);
1697                 if (status)
1698                         break;
1699         }
1700         return status;
1701 }
1702
1703 static int ti_download_firmware(struct ti_device *tdev)
1704 {
1705         int status;
1706         int buffer_size;
1707         __u8 *buffer;
1708         struct usb_device *dev = tdev->td_serial->dev;
1709         unsigned int pipe = usb_sndbulkpipe(dev,
1710                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1711         const struct firmware *fw_p;
1712         char buf[32];
1713
1714         dbg("%s\n", __func__);
1715         /* try ID specific firmware first, then try generic firmware */
1716         sprintf(buf, "ti_usb-v%04x-p%04x.fw",
1717                         le16_to_cpu(dev->descriptor.idVendor),
1718                         le16_to_cpu(dev->descriptor.idProduct));
1719         if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1720                 buf[0] = '\0';
1721                 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
1722                         switch (le16_to_cpu(dev->descriptor.idProduct)) {
1723                         case MTS_CDMA_PRODUCT_ID:
1724                                 strcpy(buf, "mts_cdma.fw");
1725                                 break;
1726                         case MTS_GSM_PRODUCT_ID:
1727                                 strcpy(buf, "mts_gsm.fw");
1728                                 break;
1729                         case MTS_EDGE_PRODUCT_ID:
1730                                 strcpy(buf, "mts_edge.fw");
1731                                 break;
1732                         case MTS_MT9234MU_PRODUCT_ID:
1733                                 strcpy(buf, "mts_mt9234mu.fw");
1734                                 break;
1735                         case MTS_MT9234ZBA_PRODUCT_ID:
1736                                 strcpy(buf, "mts_mt9234zba.fw");
1737                                 break;
1738                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1739                                 strcpy(buf, "mts_mt9234zba.fw");
1740                                 break;                  }
1741                 }
1742                 if (buf[0] == '\0') {
1743                         if (tdev->td_is_3410)
1744                                 strcpy(buf, "ti_3410.fw");
1745                         else
1746                                 strcpy(buf, "ti_5052.fw");
1747                 }
1748                 status = request_firmware(&fw_p, buf, &dev->dev);
1749         }
1750         if (status) {
1751                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1752                 return -ENOENT;
1753         }
1754         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1755                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1756                 release_firmware(fw_p);
1757                 return -ENOENT;
1758         }
1759
1760         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1761         buffer = kmalloc(buffer_size, GFP_KERNEL);
1762         if (buffer) {
1763                 memcpy(buffer, fw_p->data, fw_p->size);
1764                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1765                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1766                 kfree(buffer);
1767         } else {
1768                 dbg("%s ENOMEM\n", __func__);
1769                 status = -ENOMEM;
1770         }
1771         release_firmware(fw_p);
1772         if (status) {
1773                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1774                                                         __func__, status);
1775                 return status;
1776         }
1777
1778         dbg("%s - download successful", __func__);
1779
1780         return 0;
1781 }