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[17+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         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
 185 };
 186
 187 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
 188         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 189         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 190         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 191         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 192 };
 193
 194 static struct usb_device_id ti_id_table_combined[21+2*TI_EXTRA_VID_PID_COUNT+1] = {
 195         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 196         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 197         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 198         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 199         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 200         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 201         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 202         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 203         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 204         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 205         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 206         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 207         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 208         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 209         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 210         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 211         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 212         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 213         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
 214         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 215         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
 216         { }
 217 };
 218
 219 static struct usb_driver ti_usb_driver = {
 220         .name                   = "ti_usb_3410_5052",
 221         .probe                  = usb_serial_probe,
 222         .disconnect             = usb_serial_disconnect,
 223         .id_table               = ti_id_table_combined,
 224         .no_dynamic_id =        1,
 225 };
 226
 227 static struct usb_serial_driver ti_1port_device = {
 228         .driver = {
 229                 .owner          = THIS_MODULE,
 230                 .name           = "ti_usb_3410_5052_1",
 231         },
 232         .description            = "TI USB 3410 1 port adapter",
 233         .usb_driver             = &ti_usb_driver,
 234         .id_table               = ti_id_table_3410,
 235         .num_ports              = 1,
 236         .attach                 = ti_startup,
 237         .release                = ti_release,
 238         .open                   = ti_open,
 239         .close                  = ti_close,
 240         .write                  = ti_write,
 241         .write_room             = ti_write_room,
 242         .chars_in_buffer        = ti_chars_in_buffer,
 243         .throttle               = ti_throttle,
 244         .unthrottle             = ti_unthrottle,
 245         .ioctl                  = ti_ioctl,
 246         .set_termios            = ti_set_termios,
 247         .tiocmget               = ti_tiocmget,
 248         .tiocmset               = ti_tiocmset,
 249         .get_icount             = ti_get_icount,
 250         .break_ctl              = ti_break,
 251         .read_int_callback      = ti_interrupt_callback,
 252         .read_bulk_callback     = ti_bulk_in_callback,
 253         .write_bulk_callback    = ti_bulk_out_callback,
 254 };
 255
 256 static struct usb_serial_driver ti_2port_device = {
 257         .driver = {
 258                 .owner          = THIS_MODULE,
 259                 .name           = "ti_usb_3410_5052_2",
 260         },
 261         .description            = "TI USB 5052 2 port adapter",
 262         .usb_driver             = &ti_usb_driver,
 263         .id_table               = ti_id_table_5052,
 264         .num_ports              = 2,
 265         .attach                 = ti_startup,
 266         .release                = ti_release,
 267         .open                   = ti_open,
 268         .close                  = ti_close,
 269         .write                  = ti_write,
 270         .write_room             = ti_write_room,
 271         .chars_in_buffer        = ti_chars_in_buffer,
 272         .throttle               = ti_throttle,
 273         .unthrottle             = ti_unthrottle,
 274         .ioctl                  = ti_ioctl,
 275         .set_termios            = ti_set_termios,
 276         .tiocmget               = ti_tiocmget,
 277         .tiocmset               = ti_tiocmset,
 278         .get_icount             = ti_get_icount,
 279         .break_ctl              = ti_break,
 280         .read_int_callback      = ti_interrupt_callback,
 281         .read_bulk_callback     = ti_bulk_in_callback,
 282         .write_bulk_callback    = ti_bulk_out_callback,
 283 };
 284
 285
 286 /* Module */
 287
 288 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 289 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 290 MODULE_VERSION(TI_DRIVER_VERSION);
 291 MODULE_LICENSE("GPL");
 292
 293 MODULE_FIRMWARE("ti_3410.fw");
 294 MODULE_FIRMWARE("ti_5052.fw");
 295 MODULE_FIRMWARE("mts_cdma.fw");
 296 MODULE_FIRMWARE("mts_gsm.fw");
 297 MODULE_FIRMWARE("mts_edge.fw");
 298 MODULE_FIRMWARE("mts_mt9234mu.fw");
 299 MODULE_FIRMWARE("mts_mt9234zba.fw");
 300
 301 module_param(debug, bool, S_IRUGO | S_IWUSR);
 302 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
 303
 304 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 305 MODULE_PARM_DESC(closing_wait,
 306     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 307
 308 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 309 MODULE_PARM_DESC(vendor_3410,
 310                 "Vendor ids for 3410 based devices, 1-5 short integers");
 311 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 312 MODULE_PARM_DESC(product_3410,
 313                 "Product ids for 3410 based devices, 1-5 short integers");
 314 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 315 MODULE_PARM_DESC(vendor_5052,
 316                 "Vendor ids for 5052 based devices, 1-5 short integers");
 317 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 318 MODULE_PARM_DESC(product_5052,
 319                 "Product ids for 5052 based devices, 1-5 short integers");
 320
 321 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 322
 323
 324 /* Functions */
 325
 326 static int __init ti_init(void)
 327 {
 328         int i, j, c;
 329         int ret;
 330
 331         /* insert extra vendor and product ids */
 332         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 333         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 334         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 335                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 336                 ti_id_table_3410[j].idProduct = product_3410[i];
 337                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 338                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 339                 ti_id_table_combined[c].idProduct = product_3410[i];
 340                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 341         }
 342         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 343         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 344                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 345                 ti_id_table_5052[j].idProduct = product_5052[i];
 346                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 347                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 348                 ti_id_table_combined[c].idProduct = product_5052[i];
 349                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 350         }
 351
 352         ret = usb_serial_register(&ti_1port_device);
 353         if (ret)
 354                 goto failed_1port;
 355         ret = usb_serial_register(&ti_2port_device);
 356         if (ret)
 357                 goto failed_2port;
 358
 359         ret = usb_register(&ti_usb_driver);
 360         if (ret)
 361                 goto failed_usb;
 362
 363         printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
 364                TI_DRIVER_DESC "\n");
 365
 366         return 0;
 367
 368 failed_usb:
 369         usb_serial_deregister(&ti_2port_device);
 370 failed_2port:
 371         usb_serial_deregister(&ti_1port_device);
 372 failed_1port:
 373         return ret;
 374 }
 375
 376
 377 static void __exit ti_exit(void)
 378 {
 379         usb_deregister(&ti_usb_driver);
 380         usb_serial_deregister(&ti_1port_device);
 381         usb_serial_deregister(&ti_2port_device);
 382 }
 383
 384
 385 module_init(ti_init);
 386 module_exit(ti_exit);
 387
 388
 389 static int ti_startup(struct usb_serial *serial)
 390 {
 391         struct ti_device *tdev;
 392         struct ti_port *tport;
 393         struct usb_device *dev = serial->dev;
 394         int status;
 395         int i;
 396
 397
 398         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
 399             __func__, le16_to_cpu(dev->descriptor.idProduct),
 400             dev->descriptor.bNumConfigurations,
 401             dev->actconfig->desc.bConfigurationValue);
 402
 403         /* create device structure */
 404         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 405         if (tdev == NULL) {
 406                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 407                 return -ENOMEM;
 408         }
 409         mutex_init(&tdev->td_open_close_lock);
 410         tdev->td_serial = serial;
 411         usb_set_serial_data(serial, tdev);
 412
 413         /* determine device type */
 414         if (serial->type == &ti_1port_device)
 415                 tdev->td_is_3410 = 1;
 416         dbg("%s - device type is %s", __func__,
 417                                 tdev->td_is_3410 ? "3410" : "5052");
 418
 419         /* if we have only 1 configuration, download firmware */
 420         if (dev->descriptor.bNumConfigurations == 1) {
 421                 if ((status = ti_download_firmware(tdev)) != 0)
 422                         goto free_tdev;
 423
 424                 /* 3410 must be reset, 5052 resets itself */
 425                 if (tdev->td_is_3410) {
 426                         msleep_interruptible(100);
 427                         usb_reset_device(dev);
 428                 }
 429
 430                 status = -ENODEV;
 431                 goto free_tdev;
 432         }
 433
 434         /* the second configuration must be set */
 435         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 436                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 437                 status = status ? status : -ENODEV;
 438                 goto free_tdev;
 439         }
 440
 441         /* set up port structures */
 442         for (i = 0; i < serial->num_ports; ++i) {
 443                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
 444                 if (tport == NULL) {
 445                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 446                         status = -ENOMEM;
 447                         goto free_tports;
 448                 }
 449                 spin_lock_init(&tport->tp_lock);
 450                 tport->tp_uart_base_addr = (i == 0 ?
 451                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
 452                 tport->tp_closing_wait = closing_wait;
 453                 init_waitqueue_head(&tport->tp_write_wait);
 454                 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
 455                                                                 GFP_KERNEL)) {
 456                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 457                         kfree(tport);
 458                         status = -ENOMEM;
 459                         goto free_tports;
 460                 }
 461                 tport->tp_port = serial->port[i];
 462                 tport->tp_tdev = tdev;
 463                 usb_set_serial_port_data(serial->port[i], tport);
 464                 tport->tp_uart_mode = 0;        /* default is RS232 */
 465         }
 466
 467         return 0;
 468
 469 free_tports:
 470         for (--i; i >= 0; --i) {
 471                 tport = usb_get_serial_port_data(serial->port[i]);
 472                 kfifo_free(&tport->write_fifo);
 473                 kfree(tport);
 474                 usb_set_serial_port_data(serial->port[i], NULL);
 475         }
 476 free_tdev:
 477         kfree(tdev);
 478         usb_set_serial_data(serial, NULL);
 479         return status;
 480 }
 481
 482
 483 static void ti_release(struct usb_serial *serial)
 484 {
 485         int i;
 486         struct ti_device *tdev = usb_get_serial_data(serial);
 487         struct ti_port *tport;
 488
 489         dbg("%s", __func__);
 490
 491         for (i = 0; i < serial->num_ports; ++i) {
 492                 tport = usb_get_serial_port_data(serial->port[i]);
 493                 if (tport) {
 494                         kfifo_free(&tport->write_fifo);
 495                         kfree(tport);
 496                 }
 497         }
 498
 499         kfree(tdev);
 500 }
 501
 502
 503 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 504 {
 505         struct ti_port *tport = usb_get_serial_port_data(port);
 506         struct ti_device *tdev;
 507         struct usb_device *dev;
 508         struct urb *urb;
 509         int port_number;
 510         int status;
 511         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 512                              TI_PIPE_TIMEOUT_ENABLE |
 513                              (TI_TRANSFER_TIMEOUT << 2));
 514
 515         dbg("%s - port %d", __func__, port->number);
 516
 517         if (tport == NULL)
 518                 return -ENODEV;
 519
 520         dev = port->serial->dev;
 521         tdev = tport->tp_tdev;
 522
 523         /* only one open on any port on a device at a time */
 524         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 525                 return -ERESTARTSYS;
 526
 527         port_number = port->number - port->serial->minor;
 528
 529         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 530
 531         tport->tp_msr = 0;
 532         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 533
 534         /* start interrupt urb the first time a port is opened on this device */
 535         if (tdev->td_open_port_count == 0) {
 536                 dbg("%s - start interrupt in urb", __func__);
 537                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 538                 if (!urb) {
 539                         dev_err(&port->dev, "%s - no interrupt urb\n",
 540                                                                 __func__);
 541                         status = -EINVAL;
 542                         goto release_lock;
 543                 }
 544                 urb->complete = ti_interrupt_callback;
 545                 urb->context = tdev;
 546                 urb->dev = dev;
 547                 status = usb_submit_urb(urb, GFP_KERNEL);
 548                 if (status) {
 549                         dev_err(&port->dev,
 550                                 "%s - submit interrupt urb failed, %d\n",
 551                                         __func__, status);
 552                         goto release_lock;
 553                 }
 554         }
 555
 556         if (tty)
 557                 ti_set_termios(tty, port, tty->termios);
 558
 559         dbg("%s - sending TI_OPEN_PORT", __func__);
 560         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 561                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 562         if (status) {
 563                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 564                                                         __func__, status);
 565                 goto unlink_int_urb;
 566         }
 567
 568         dbg("%s - sending TI_START_PORT", __func__);
 569         status = ti_command_out_sync(tdev, TI_START_PORT,
 570                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 571         if (status) {
 572                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 573                                                         __func__, status);
 574                 goto unlink_int_urb;
 575         }
 576
 577         dbg("%s - sending TI_PURGE_PORT", __func__);
 578         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 579                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 580         if (status) {
 581                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 582                                                         __func__, status);
 583                 goto unlink_int_urb;
 584         }
 585         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 586                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 587         if (status) {
 588                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 589                                                         __func__, status);
 590                 goto unlink_int_urb;
 591         }
 592
 593         /* reset the data toggle on the bulk endpoints to work around bug in
 594          * host controllers where things get out of sync some times */
 595         usb_clear_halt(dev, port->write_urb->pipe);
 596         usb_clear_halt(dev, port->read_urb->pipe);
 597
 598         if (tty)
 599                 ti_set_termios(tty, port, tty->termios);
 600
 601         dbg("%s - sending TI_OPEN_PORT (2)", __func__);
 602         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 603                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 604         if (status) {
 605                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 606                                                         __func__, status);
 607                 goto unlink_int_urb;
 608         }
 609
 610         dbg("%s - sending TI_START_PORT (2)", __func__);
 611         status = ti_command_out_sync(tdev, TI_START_PORT,
 612                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 613         if (status) {
 614                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 615                                                         __func__, status);
 616                 goto unlink_int_urb;
 617         }
 618
 619         /* start read urb */
 620         dbg("%s - start read urb", __func__);
 621         urb = port->read_urb;
 622         if (!urb) {
 623                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 624                 status = -EINVAL;
 625                 goto unlink_int_urb;
 626         }
 627         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 628         urb->complete = ti_bulk_in_callback;
 629         urb->context = tport;
 630         urb->dev = dev;
 631         status = usb_submit_urb(urb, GFP_KERNEL);
 632         if (status) {
 633                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 634                                                         __func__, status);
 635                 goto unlink_int_urb;
 636         }
 637
 638         tport->tp_is_open = 1;
 639         ++tdev->td_open_port_count;
 640
 641         goto release_lock;
 642
 643 unlink_int_urb:
 644         if (tdev->td_open_port_count == 0)
 645                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 646 release_lock:
 647         mutex_unlock(&tdev->td_open_close_lock);
 648         dbg("%s - exit %d", __func__, status);
 649         return status;
 650 }
 651
 652
 653 static void ti_close(struct usb_serial_port *port)
 654 {
 655         struct ti_device *tdev;
 656         struct ti_port *tport;
 657         int port_number;
 658         int status;
 659         int do_unlock;
 660
 661         dbg("%s - port %d", __func__, port->number);
 662
 663         tdev = usb_get_serial_data(port->serial);
 664         tport = usb_get_serial_port_data(port);
 665         if (tdev == NULL || tport == NULL)
 666                 return;
 667
 668         tport->tp_is_open = 0;
 669
 670         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 671
 672         usb_kill_urb(port->read_urb);
 673         usb_kill_urb(port->write_urb);
 674         tport->tp_write_urb_in_use = 0;
 675
 676         port_number = port->number - port->serial->minor;
 677
 678         dbg("%s - sending TI_CLOSE_PORT", __func__);
 679         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 680                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 681         if (status)
 682                 dev_err(&port->dev,
 683                         "%s - cannot send close port command, %d\n"
 684                                                         , __func__, status);
 685
 686         /* if mutex_lock is interrupted, continue anyway */
 687         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 688         --tport->tp_tdev->td_open_port_count;
 689         if (tport->tp_tdev->td_open_port_count <= 0) {
 690                 /* last port is closed, shut down interrupt urb */
 691                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 692                 tport->tp_tdev->td_open_port_count = 0;
 693         }
 694         if (do_unlock)
 695                 mutex_unlock(&tdev->td_open_close_lock);
 696
 697         dbg("%s - exit", __func__);
 698 }
 699
 700
 701 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 702                         const unsigned char *data, int count)
 703 {
 704         struct ti_port *tport = usb_get_serial_port_data(port);
 705
 706         dbg("%s - port %d", __func__, port->number);
 707
 708         if (count == 0) {
 709                 dbg("%s - write request of 0 bytes", __func__);
 710                 return 0;
 711         }
 712
 713         if (tport == NULL || !tport->tp_is_open)
 714                 return -ENODEV;
 715
 716         count = kfifo_in_locked(&tport->write_fifo, data, count,
 717                                                         &tport->tp_lock);
 718         ti_send(tport);
 719
 720         return count;
 721 }
 722
 723
 724 static int ti_write_room(struct tty_struct *tty)
 725 {
 726         struct usb_serial_port *port = tty->driver_data;
 727         struct ti_port *tport = usb_get_serial_port_data(port);
 728         int room = 0;
 729         unsigned long flags;
 730
 731         dbg("%s - port %d", __func__, port->number);
 732
 733         if (tport == NULL)
 734                 return 0;
 735
 736         spin_lock_irqsave(&tport->tp_lock, flags);
 737         room = kfifo_avail(&tport->write_fifo);
 738         spin_unlock_irqrestore(&tport->tp_lock, flags);
 739
 740         dbg("%s - returns %d", __func__, room);
 741         return room;
 742 }
 743
 744
 745 static int ti_chars_in_buffer(struct tty_struct *tty)
 746 {
 747         struct usb_serial_port *port = tty->driver_data;
 748         struct ti_port *tport = usb_get_serial_port_data(port);
 749         int chars = 0;
 750         unsigned long flags;
 751
 752         dbg("%s - port %d", __func__, port->number);
 753
 754         if (tport == NULL)
 755                 return 0;
 756
 757         spin_lock_irqsave(&tport->tp_lock, flags);
 758         chars = kfifo_len(&tport->write_fifo);
 759         spin_unlock_irqrestore(&tport->tp_lock, flags);
 760
 761         dbg("%s - returns %d", __func__, chars);
 762         return chars;
 763 }
 764
 765
 766 static void ti_throttle(struct tty_struct *tty)
 767 {
 768         struct usb_serial_port *port = tty->driver_data;
 769         struct ti_port *tport = usb_get_serial_port_data(port);
 770
 771         dbg("%s - port %d", __func__, port->number);
 772
 773         if (tport == NULL)
 774                 return;
 775
 776         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 777                 ti_stop_read(tport, tty);
 778
 779 }
 780
 781
 782 static void ti_unthrottle(struct tty_struct *tty)
 783 {
 784         struct usb_serial_port *port = tty->driver_data;
 785         struct ti_port *tport = usb_get_serial_port_data(port);
 786         int status;
 787
 788         dbg("%s - port %d", __func__, port->number);
 789
 790         if (tport == NULL)
 791                 return;
 792
 793         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 794                 status = ti_restart_read(tport, tty);
 795                 if (status)
 796                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 797                                                         __func__, status);
 798         }
 799 }
 800
 801 static int ti_get_icount(struct tty_struct *tty,
 802                 struct serial_icounter_struct *icount)
 803 {
 804         struct usb_serial_port *port = tty->driver_data;
 805         struct ti_port *tport = usb_get_serial_port_data(port);
 806         struct async_icount cnow = tport->tp_icount;
 807
 808         dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
 809                 __func__, port->number,
 810                 cnow.rx, cnow.tx);
 811
 812         icount->cts = cnow.cts;
 813         icount->dsr = cnow.dsr;
 814         icount->rng = cnow.rng;
 815         icount->dcd = cnow.dcd;
 816         icount->rx = cnow.rx;
 817         icount->tx = cnow.tx;
 818         icount->frame = cnow.frame;
 819         icount->overrun = cnow.overrun;
 820         icount->parity = cnow.parity;
 821         icount->brk = cnow.brk;
 822         icount->buf_overrun = cnow.buf_overrun;
 823
 824         return 0;
 825 }
 826
 827 static int ti_ioctl(struct tty_struct *tty,
 828         unsigned int cmd, unsigned long arg)
 829 {
 830         struct usb_serial_port *port = tty->driver_data;
 831         struct ti_port *tport = usb_get_serial_port_data(port);
 832         struct async_icount cnow;
 833         struct async_icount cprev;
 834
 835         dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
 836
 837         if (tport == NULL)
 838                 return -ENODEV;
 839
 840         switch (cmd) {
 841         case TIOCGSERIAL:
 842                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
 843                 return ti_get_serial_info(tport,
 844                                 (struct serial_struct __user *)arg);
 845         case TIOCSSERIAL:
 846                 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
 847                 return ti_set_serial_info(tty, tport,
 848                                 (struct serial_struct __user *)arg);
 849         case TIOCMIWAIT:
 850                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
 851                 cprev = tport->tp_icount;
 852                 while (1) {
 853                         interruptible_sleep_on(&port->delta_msr_wait);
 854                         if (signal_pending(current))
 855                                 return -ERESTARTSYS;
 856
 857                         if (port->serial->disconnected)
 858                                 return -EIO;
 859
 860                         cnow = tport->tp_icount;
 861                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 862                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 863                                 return -EIO; /* no change => error */
 864                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 865                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 866                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 867                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
 868                                 return 0;
 869                         cprev = cnow;
 870                 }
 871                 break;
 872         }
 873         return -ENOIOCTLCMD;
 874 }
 875
 876
 877 static void ti_set_termios(struct tty_struct *tty,
 878                 struct usb_serial_port *port, struct ktermios *old_termios)
 879 {
 880         struct ti_port *tport = usb_get_serial_port_data(port);
 881         struct ti_uart_config *config;
 882         tcflag_t cflag, iflag;
 883         int baud;
 884         int status;
 885         int port_number = port->number - port->serial->minor;
 886         unsigned int mcr;
 887
 888         dbg("%s - port %d", __func__, port->number);
 889
 890         cflag = tty->termios->c_cflag;
 891         iflag = tty->termios->c_iflag;
 892
 893         dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
 894         dbg("%s - old clfag %08x, old iflag %08x", __func__,
 895                                 old_termios->c_cflag, old_termios->c_iflag);
 896
 897         if (tport == NULL)
 898                 return;
 899
 900         config = kmalloc(sizeof(*config), GFP_KERNEL);
 901         if (!config) {
 902                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 903                 return;
 904         }
 905
 906         config->wFlags = 0;
 907
 908         /* these flags must be set */
 909         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 910         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 911         config->bUartMode = (__u8)(tport->tp_uart_mode);
 912
 913         switch (cflag & CSIZE) {
 914         case CS5:
 915                     config->bDataBits = TI_UART_5_DATA_BITS;
 916                     break;
 917         case CS6:
 918                     config->bDataBits = TI_UART_6_DATA_BITS;
 919                     break;
 920         case CS7:
 921                     config->bDataBits = TI_UART_7_DATA_BITS;
 922                     break;
 923         default:
 924         case CS8:
 925                     config->bDataBits = TI_UART_8_DATA_BITS;
 926                     break;
 927         }
 928
 929         /* CMSPAR isn't supported by this driver */
 930         tty->termios->c_cflag &= ~CMSPAR;
 931
 932         if (cflag & PARENB) {
 933                 if (cflag & PARODD) {
 934                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 935                         config->bParity = TI_UART_ODD_PARITY;
 936                 } else {
 937                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 938                         config->bParity = TI_UART_EVEN_PARITY;
 939                 }
 940         } else {
 941                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 942                 config->bParity = TI_UART_NO_PARITY;
 943         }
 944
 945         if (cflag & CSTOPB)
 946                 config->bStopBits = TI_UART_2_STOP_BITS;
 947         else
 948                 config->bStopBits = TI_UART_1_STOP_BITS;
 949
 950         if (cflag & CRTSCTS) {
 951                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 952                 if ((cflag & CBAUD) != B0)
 953                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 954                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 955         } else {
 956                 tty->hw_stopped = 0;
 957                 ti_restart_read(tport, tty);
 958         }
 959
 960         if (I_IXOFF(tty) || I_IXON(tty)) {
 961                 config->cXon  = START_CHAR(tty);
 962                 config->cXoff = STOP_CHAR(tty);
 963
 964                 if (I_IXOFF(tty))
 965                         config->wFlags |= TI_UART_ENABLE_X_IN;
 966                 else
 967                         ti_restart_read(tport, tty);
 968
 969                 if (I_IXON(tty))
 970                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 971         }
 972
 973         baud = tty_get_baud_rate(tty);
 974         if (!baud)
 975                 baud = 9600;
 976         if (tport->tp_tdev->td_is_3410)
 977                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 978         else
 979                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 980
 981         /* FIXME: Should calculate resulting baud here and report it back */
 982         if ((cflag & CBAUD) != B0)
 983                 tty_encode_baud_rate(tty, baud, baud);
 984
 985         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 986         __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
 987
 988         cpu_to_be16s(&config->wBaudRate);
 989         cpu_to_be16s(&config->wFlags);
 990
 991         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 992                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 993                 sizeof(*config));
 994         if (status)
 995                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 996                                         __func__, port_number, status);
 997
 998         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 999         mcr = tport->tp_shadow_mcr;
1000         /* if baud rate is B0, clear RTS and DTR */
1001         if ((cflag & CBAUD) == B0)
1002                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1003         status = ti_set_mcr(tport, mcr);
1004         if (status)
1005                 dev_err(&port->dev,
1006                         "%s - cannot set modem control on port %d, %d\n",
1007                                                 __func__, port_number, status);
1008
1009         kfree(config);
1010 }
1011
1012
1013 static int ti_tiocmget(struct tty_struct *tty)
1014 {
1015         struct usb_serial_port *port = tty->driver_data;
1016         struct ti_port *tport = usb_get_serial_port_data(port);
1017         unsigned int result;
1018         unsigned int msr;
1019         unsigned int mcr;
1020         unsigned long flags;
1021
1022         dbg("%s - port %d", __func__, port->number);
1023
1024         if (tport == NULL)
1025                 return -ENODEV;
1026
1027         spin_lock_irqsave(&tport->tp_lock, flags);
1028         msr = tport->tp_msr;
1029         mcr = tport->tp_shadow_mcr;
1030         spin_unlock_irqrestore(&tport->tp_lock, flags);
1031
1032         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1033                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1034                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1035                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1036                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1037                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1038                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1039
1040         dbg("%s - 0x%04X", __func__, result);
1041
1042         return result;
1043 }
1044
1045
1046 static int ti_tiocmset(struct tty_struct *tty,
1047                                 unsigned int set, unsigned int clear)
1048 {
1049         struct usb_serial_port *port = tty->driver_data;
1050         struct ti_port *tport = usb_get_serial_port_data(port);
1051         unsigned int mcr;
1052         unsigned long flags;
1053
1054         dbg("%s - port %d", __func__, port->number);
1055
1056         if (tport == NULL)
1057                 return -ENODEV;
1058
1059         spin_lock_irqsave(&tport->tp_lock, flags);
1060         mcr = tport->tp_shadow_mcr;
1061
1062         if (set & TIOCM_RTS)
1063                 mcr |= TI_MCR_RTS;
1064         if (set & TIOCM_DTR)
1065                 mcr |= TI_MCR_DTR;
1066         if (set & TIOCM_LOOP)
1067                 mcr |= TI_MCR_LOOP;
1068
1069         if (clear & TIOCM_RTS)
1070                 mcr &= ~TI_MCR_RTS;
1071         if (clear & TIOCM_DTR)
1072                 mcr &= ~TI_MCR_DTR;
1073         if (clear & TIOCM_LOOP)
1074                 mcr &= ~TI_MCR_LOOP;
1075         spin_unlock_irqrestore(&tport->tp_lock, flags);
1076
1077         return ti_set_mcr(tport, mcr);
1078 }
1079
1080
1081 static void ti_break(struct tty_struct *tty, int break_state)
1082 {
1083         struct usb_serial_port *port = tty->driver_data;
1084         struct ti_port *tport = usb_get_serial_port_data(port);
1085         int status;
1086
1087         dbg("%s - state = %d", __func__, break_state);
1088
1089         if (tport == NULL)
1090                 return;
1091
1092         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1093
1094         status = ti_write_byte(tport->tp_tdev,
1095                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1096                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1097
1098         if (status)
1099                 dbg("%s - error setting break, %d", __func__, status);
1100 }
1101
1102
1103 static void ti_interrupt_callback(struct urb *urb)
1104 {
1105         struct ti_device *tdev = urb->context;
1106         struct usb_serial_port *port;
1107         struct usb_serial *serial = tdev->td_serial;
1108         struct ti_port *tport;
1109         struct device *dev = &urb->dev->dev;
1110         unsigned char *data = urb->transfer_buffer;
1111         int length = urb->actual_length;
1112         int port_number;
1113         int function;
1114         int status = urb->status;
1115         int retval;
1116         __u8 msr;
1117
1118         dbg("%s", __func__);
1119
1120         switch (status) {
1121         case 0:
1122                 break;
1123         case -ECONNRESET:
1124         case -ENOENT:
1125         case -ESHUTDOWN:
1126                 dbg("%s - urb shutting down, %d", __func__, status);
1127                 tdev->td_urb_error = 1;
1128                 return;
1129         default:
1130                 dev_err(dev, "%s - nonzero urb status, %d\n",
1131                         __func__, status);
1132                 tdev->td_urb_error = 1;
1133                 goto exit;
1134         }
1135
1136         if (length != 2) {
1137                 dbg("%s - bad packet size, %d", __func__, length);
1138                 goto exit;
1139         }
1140
1141         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1142                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1143                 goto exit;
1144         }
1145
1146         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1147         function = TI_GET_FUNC_FROM_CODE(data[0]);
1148
1149         dbg("%s - port_number %d, function %d, data 0x%02X",
1150                                 __func__, port_number, function, data[1]);
1151
1152         if (port_number >= serial->num_ports) {
1153                 dev_err(dev, "%s - bad port number, %d\n",
1154                                                 __func__, port_number);
1155                 goto exit;
1156         }
1157
1158         port = serial->port[port_number];
1159
1160         tport = usb_get_serial_port_data(port);
1161         if (!tport)
1162                 goto exit;
1163
1164         switch (function) {
1165         case TI_CODE_DATA_ERROR:
1166                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1167                                         __func__, port_number, data[1]);
1168                 break;
1169
1170         case TI_CODE_MODEM_STATUS:
1171                 msr = data[1];
1172                 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1173                 ti_handle_new_msr(tport, msr);
1174                 break;
1175
1176         default:
1177                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1178                                                         __func__, data[1]);
1179                 break;
1180         }
1181
1182 exit:
1183         retval = usb_submit_urb(urb, GFP_ATOMIC);
1184         if (retval)
1185                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1186                         __func__, retval);
1187 }
1188
1189
1190 static void ti_bulk_in_callback(struct urb *urb)
1191 {
1192         struct ti_port *tport = urb->context;
1193         struct usb_serial_port *port = tport->tp_port;
1194         struct device *dev = &urb->dev->dev;
1195         int status = urb->status;
1196         int retval = 0;
1197         struct tty_struct *tty;
1198
1199         dbg("%s", __func__);
1200
1201         switch (status) {
1202         case 0:
1203                 break;
1204         case -ECONNRESET:
1205         case -ENOENT:
1206         case -ESHUTDOWN:
1207                 dbg("%s - urb shutting down, %d", __func__, status);
1208                 tport->tp_tdev->td_urb_error = 1;
1209                 wake_up_interruptible(&tport->tp_write_wait);
1210                 return;
1211         default:
1212                 dev_err(dev, "%s - nonzero urb status, %d\n",
1213                         __func__, status);
1214                 tport->tp_tdev->td_urb_error = 1;
1215                 wake_up_interruptible(&tport->tp_write_wait);
1216         }
1217
1218         if (status == -EPIPE)
1219                 goto exit;
1220
1221         if (status) {
1222                 dev_err(dev, "%s - stopping read!\n", __func__);
1223                 return;
1224         }
1225
1226         tty = tty_port_tty_get(&port->port);
1227         if (tty) {
1228                 if (urb->actual_length) {
1229                         usb_serial_debug_data(debug, dev, __func__,
1230                                 urb->actual_length, urb->transfer_buffer);
1231
1232                         if (!tport->tp_is_open)
1233                                 dbg("%s - port closed, dropping data",
1234                                         __func__);
1235                         else
1236                                 ti_recv(&urb->dev->dev, tty,
1237                                                 urb->transfer_buffer,
1238                                                 urb->actual_length);
1239                         spin_lock(&tport->tp_lock);
1240                         tport->tp_icount.rx += urb->actual_length;
1241                         spin_unlock(&tport->tp_lock);
1242                 }
1243                 tty_kref_put(tty);
1244         }
1245
1246 exit:
1247         /* continue to read unless stopping */
1248         spin_lock(&tport->tp_lock);
1249         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1250                 urb->dev = port->serial->dev;
1251                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1252         } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1253                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1254         }
1255         spin_unlock(&tport->tp_lock);
1256         if (retval)
1257                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1258                         __func__, retval);
1259 }
1260
1261
1262 static void ti_bulk_out_callback(struct urb *urb)
1263 {
1264         struct ti_port *tport = urb->context;
1265         struct usb_serial_port *port = tport->tp_port;
1266         struct device *dev = &urb->dev->dev;
1267         int status = urb->status;
1268
1269         dbg("%s - port %d", __func__, port->number);
1270
1271         tport->tp_write_urb_in_use = 0;
1272
1273         switch (status) {
1274         case 0:
1275                 break;
1276         case -ECONNRESET:
1277         case -ENOENT:
1278         case -ESHUTDOWN:
1279                 dbg("%s - urb shutting down, %d", __func__, status);
1280                 tport->tp_tdev->td_urb_error = 1;
1281                 wake_up_interruptible(&tport->tp_write_wait);
1282                 return;
1283         default:
1284                 dev_err(dev, "%s - nonzero urb status, %d\n",
1285                         __func__, status);
1286                 tport->tp_tdev->td_urb_error = 1;
1287                 wake_up_interruptible(&tport->tp_write_wait);
1288         }
1289
1290         /* send any buffered data */
1291         ti_send(tport);
1292 }
1293
1294
1295 static void ti_recv(struct device *dev, struct tty_struct *tty,
1296         unsigned char *data, int length)
1297 {
1298         int cnt;
1299
1300         do {
1301                 cnt = tty_insert_flip_string(tty, data, length);
1302                 if (cnt < length) {
1303                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1304                                                 __func__, length - cnt);
1305                         if (cnt == 0)
1306                                 break;
1307                 }
1308                 tty_flip_buffer_push(tty);
1309                 data += cnt;
1310                 length -= cnt;
1311         } while (length > 0);
1312
1313 }
1314
1315
1316 static void ti_send(struct ti_port *tport)
1317 {
1318         int count, result;
1319         struct usb_serial_port *port = tport->tp_port;
1320         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1321         unsigned long flags;
1322
1323
1324         dbg("%s - port %d", __func__, port->number);
1325
1326         spin_lock_irqsave(&tport->tp_lock, flags);
1327
1328         if (tport->tp_write_urb_in_use)
1329                 goto unlock;
1330
1331         count = kfifo_out(&tport->write_fifo,
1332                                 port->write_urb->transfer_buffer,
1333                                 port->bulk_out_size);
1334
1335         if (count == 0)
1336                 goto unlock;
1337
1338         tport->tp_write_urb_in_use = 1;
1339
1340         spin_unlock_irqrestore(&tport->tp_lock, flags);
1341
1342         usb_serial_debug_data(debug, &port->dev, __func__, count,
1343                                         port->write_urb->transfer_buffer);
1344
1345         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1346                            usb_sndbulkpipe(port->serial->dev,
1347                                             port->bulk_out_endpointAddress),
1348                            port->write_urb->transfer_buffer, count,
1349                            ti_bulk_out_callback, tport);
1350
1351         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1352         if (result) {
1353                 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1354                                                         __func__, result);
1355                 tport->tp_write_urb_in_use = 0;
1356                 /* TODO: reschedule ti_send */
1357         } else {
1358                 spin_lock_irqsave(&tport->tp_lock, flags);
1359                 tport->tp_icount.tx += count;
1360                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1361         }
1362
1363         /* more room in the buffer for new writes, wakeup */
1364         if (tty)
1365                 tty_wakeup(tty);
1366         tty_kref_put(tty);
1367         wake_up_interruptible(&tport->tp_write_wait);
1368         return;
1369 unlock:
1370         spin_unlock_irqrestore(&tport->tp_lock, flags);
1371         tty_kref_put(tty);
1372         return;
1373 }
1374
1375
1376 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1377 {
1378         unsigned long flags;
1379         int status;
1380
1381         status = ti_write_byte(tport->tp_tdev,
1382                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1383                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1384
1385         spin_lock_irqsave(&tport->tp_lock, flags);
1386         if (!status)
1387                 tport->tp_shadow_mcr = mcr;
1388         spin_unlock_irqrestore(&tport->tp_lock, flags);
1389
1390         return status;
1391 }
1392
1393
1394 static int ti_get_lsr(struct ti_port *tport)
1395 {
1396         int size, status;
1397         struct ti_device *tdev = tport->tp_tdev;
1398         struct usb_serial_port *port = tport->tp_port;
1399         int port_number = port->number - port->serial->minor;
1400         struct ti_port_status *data;
1401
1402         dbg("%s - port %d", __func__, port->number);
1403
1404         size = sizeof(struct ti_port_status);
1405         data = kmalloc(size, GFP_KERNEL);
1406         if (!data) {
1407                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1408                 return -ENOMEM;
1409         }
1410
1411         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1412                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1413         if (status) {
1414                 dev_err(&port->dev,
1415                         "%s - get port status command failed, %d\n",
1416                                                         __func__, status);
1417                 goto free_data;
1418         }
1419
1420         dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1421
1422         tport->tp_lsr = data->bLSR;
1423
1424 free_data:
1425         kfree(data);
1426         return status;
1427 }
1428
1429
1430 static int ti_get_serial_info(struct ti_port *tport,
1431         struct serial_struct __user *ret_arg)
1432 {
1433         struct usb_serial_port *port = tport->tp_port;
1434         struct serial_struct ret_serial;
1435
1436         if (!ret_arg)
1437                 return -EFAULT;
1438
1439         memset(&ret_serial, 0, sizeof(ret_serial));
1440
1441         ret_serial.type = PORT_16550A;
1442         ret_serial.line = port->serial->minor;
1443         ret_serial.port = port->number - port->serial->minor;
1444         ret_serial.flags = tport->tp_flags;
1445         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1446         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1447         ret_serial.closing_wait = tport->tp_closing_wait;
1448
1449         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1450                 return -EFAULT;
1451
1452         return 0;
1453 }
1454
1455
1456 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1457         struct serial_struct __user *new_arg)
1458 {
1459         struct serial_struct new_serial;
1460
1461         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1462                 return -EFAULT;
1463
1464         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1465         tport->tp_closing_wait = new_serial.closing_wait;
1466
1467         return 0;
1468 }
1469
1470
1471 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1472 {
1473         struct async_icount *icount;
1474         struct tty_struct *tty;
1475         unsigned long flags;
1476
1477         dbg("%s - msr 0x%02X", __func__, msr);
1478
1479         if (msr & TI_MSR_DELTA_MASK) {
1480                 spin_lock_irqsave(&tport->tp_lock, flags);
1481                 icount = &tport->tp_icount;
1482                 if (msr & TI_MSR_DELTA_CTS)
1483                         icount->cts++;
1484                 if (msr & TI_MSR_DELTA_DSR)
1485                         icount->dsr++;
1486                 if (msr & TI_MSR_DELTA_CD)
1487                         icount->dcd++;
1488                 if (msr & TI_MSR_DELTA_RI)
1489                         icount->rng++;
1490                 wake_up_interruptible(&tport->tp_port->delta_msr_wait);
1491                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1492         }
1493
1494         tport->tp_msr = msr & TI_MSR_MASK;
1495
1496         /* handle CTS flow control */
1497         tty = tty_port_tty_get(&tport->tp_port->port);
1498         if (tty && C_CRTSCTS(tty)) {
1499                 if (msr & TI_MSR_CTS) {
1500                         tty->hw_stopped = 0;
1501                         tty_wakeup(tty);
1502                 } else {
1503                         tty->hw_stopped = 1;
1504                 }
1505         }
1506         tty_kref_put(tty);
1507 }
1508
1509
1510 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1511 {
1512         struct ti_device *tdev = tport->tp_tdev;
1513         struct usb_serial_port *port = tport->tp_port;
1514         wait_queue_t wait;
1515
1516         dbg("%s - port %d", __func__, port->number);
1517
1518         spin_lock_irq(&tport->tp_lock);
1519
1520         /* wait for data to drain from the buffer */
1521         tdev->td_urb_error = 0;
1522         init_waitqueue_entry(&wait, current);
1523         add_wait_queue(&tport->tp_write_wait, &wait);
1524         for (;;) {
1525                 set_current_state(TASK_INTERRUPTIBLE);
1526                 if (kfifo_len(&tport->write_fifo) == 0
1527                 || timeout == 0 || signal_pending(current)
1528                 || tdev->td_urb_error
1529                 || port->serial->disconnected)  /* disconnect */
1530                         break;
1531                 spin_unlock_irq(&tport->tp_lock);
1532                 timeout = schedule_timeout(timeout);
1533                 spin_lock_irq(&tport->tp_lock);
1534         }
1535         set_current_state(TASK_RUNNING);
1536         remove_wait_queue(&tport->tp_write_wait, &wait);
1537
1538         /* flush any remaining data in the buffer */
1539         if (flush)
1540                 kfifo_reset_out(&tport->write_fifo);
1541
1542         spin_unlock_irq(&tport->tp_lock);
1543
1544         mutex_lock(&port->serial->disc_mutex);
1545         /* wait for data to drain from the device */
1546         /* wait for empty tx register, plus 20 ms */
1547         timeout += jiffies;
1548         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1549         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1550         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1551         && !port->serial->disconnected) {
1552                 if (ti_get_lsr(tport))
1553                         break;
1554                 mutex_unlock(&port->serial->disc_mutex);
1555                 msleep_interruptible(20);
1556                 mutex_lock(&port->serial->disc_mutex);
1557         }
1558         mutex_unlock(&port->serial->disc_mutex);
1559 }
1560
1561
1562 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1563 {
1564         unsigned long flags;
1565
1566         spin_lock_irqsave(&tport->tp_lock, flags);
1567
1568         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1569                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1570
1571         spin_unlock_irqrestore(&tport->tp_lock, flags);
1572 }
1573
1574
1575 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1576 {
1577         struct urb *urb;
1578         int status = 0;
1579         unsigned long flags;
1580
1581         spin_lock_irqsave(&tport->tp_lock, flags);
1582
1583         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1584                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1585                 urb = tport->tp_port->read_urb;
1586                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1587                 urb->complete = ti_bulk_in_callback;
1588                 urb->context = tport;
1589                 urb->dev = tport->tp_port->serial->dev;
1590                 status = usb_submit_urb(urb, GFP_KERNEL);
1591         } else  {
1592                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1593                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1594         }
1595
1596         return status;
1597 }
1598
1599
1600 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1601         __u16 moduleid, __u16 value, __u8 *data, int size)
1602 {
1603         int status;
1604
1605         status = usb_control_msg(tdev->td_serial->dev,
1606                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1607                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1608                 value, moduleid, data, size, 1000);
1609
1610         if (status == size)
1611                 status = 0;
1612
1613         if (status > 0)
1614                 status = -ECOMM;
1615
1616         return status;
1617 }
1618
1619
1620 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1621         __u16 moduleid, __u16 value, __u8 *data, int size)
1622 {
1623         int status;
1624
1625         status = usb_control_msg(tdev->td_serial->dev,
1626                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1627                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1628                 value, moduleid, data, size, 1000);
1629
1630         if (status == size)
1631                 status = 0;
1632
1633         if (status > 0)
1634                 status = -ECOMM;
1635
1636         return status;
1637 }
1638
1639
1640 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1641         __u8 mask, __u8 byte)
1642 {
1643         int status;
1644         unsigned int size;
1645         struct ti_write_data_bytes *data;
1646         struct device *dev = &tdev->td_serial->dev->dev;
1647
1648         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1649                                         __func__, addr, mask, byte);
1650
1651         size = sizeof(struct ti_write_data_bytes) + 2;
1652         data = kmalloc(size, GFP_KERNEL);
1653         if (!data) {
1654                 dev_err(dev, "%s - out of memory\n", __func__);
1655                 return -ENOMEM;
1656         }
1657
1658         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1659         data->bDataType = TI_RW_DATA_BYTE;
1660         data->bDataCounter = 1;
1661         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1662         data->wBaseAddrLo = cpu_to_be16(addr);
1663         data->bData[0] = mask;
1664         data->bData[1] = byte;
1665
1666         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1667                 (__u8 *)data, size);
1668
1669         if (status < 0)
1670                 dev_err(dev, "%s - failed, %d\n", __func__, status);
1671
1672         kfree(data);
1673
1674         return status;
1675 }
1676
1677 static int ti_do_download(struct usb_device *dev, int pipe,
1678                                                 u8 *buffer, int size)
1679 {
1680         int pos;
1681         u8 cs = 0;
1682         int done;
1683         struct ti_firmware_header *header;
1684         int status = 0;
1685         int len;
1686
1687         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1688                 cs = (__u8)(cs + buffer[pos]);
1689
1690         header = (struct ti_firmware_header *)buffer;
1691         header->wLength = cpu_to_le16((__u16)(size
1692                                         - sizeof(struct ti_firmware_header)));
1693         header->bCheckSum = cs;
1694
1695         dbg("%s - downloading firmware", __func__);
1696         for (pos = 0; pos < size; pos += done) {
1697                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1698                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1699                                                                 &done, 1000);
1700                 if (status)
1701                         break;
1702         }
1703         return status;
1704 }
1705
1706 static int ti_download_firmware(struct ti_device *tdev)
1707 {
1708         int status;
1709         int buffer_size;
1710         __u8 *buffer;
1711         struct usb_device *dev = tdev->td_serial->dev;
1712         unsigned int pipe = usb_sndbulkpipe(dev,
1713                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1714         const struct firmware *fw_p;
1715         char buf[32];
1716
1717         dbg("%s\n", __func__);
1718         /* try ID specific firmware first, then try generic firmware */
1719         sprintf(buf, "ti_usb-v%04x-p%04x.fw",
1720                         le16_to_cpu(dev->descriptor.idVendor),
1721                         le16_to_cpu(dev->descriptor.idProduct));
1722         if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1723                 buf[0] = '\0';
1724                 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
1725                         switch (le16_to_cpu(dev->descriptor.idProduct)) {
1726                         case MTS_CDMA_PRODUCT_ID:
1727                                 strcpy(buf, "mts_cdma.fw");
1728                                 break;
1729                         case MTS_GSM_PRODUCT_ID:
1730                                 strcpy(buf, "mts_gsm.fw");
1731                                 break;
1732                         case MTS_EDGE_PRODUCT_ID:
1733                                 strcpy(buf, "mts_edge.fw");
1734                                 break;
1735                         case MTS_MT9234MU_PRODUCT_ID:
1736                                 strcpy(buf, "mts_mt9234mu.fw");
1737                                 break;
1738                         case MTS_MT9234ZBA_PRODUCT_ID:
1739                                 strcpy(buf, "mts_mt9234zba.fw");
1740                                 break;
1741                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1742                                 strcpy(buf, "mts_mt9234zba.fw");
1743                                 break;                  }
1744                 }
1745                 if (buf[0] == '\0') {
1746                         if (tdev->td_is_3410)
1747                                 strcpy(buf, "ti_3410.fw");
1748                         else
1749                                 strcpy(buf, "ti_5052.fw");
1750                 }
1751                 status = request_firmware(&fw_p, buf, &dev->dev);
1752         }
1753         if (status) {
1754                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1755                 return -ENOENT;
1756         }
1757         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1758                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1759                 release_firmware(fw_p);
1760                 return -ENOENT;
1761         }
1762
1763         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1764         buffer = kmalloc(buffer_size, GFP_KERNEL);
1765         if (buffer) {
1766                 memcpy(buffer, fw_p->data, fw_p->size);
1767                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1768                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1769                 kfree(buffer);
1770         } else {
1771                 dbg("%s ENOMEM\n", __func__);
1772                 status = -ENOMEM;
1773         }
1774         release_firmware(fw_p);
1775         if (status) {
1776                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1777                                                         __func__, status);
1778                 return status;
1779         }
1780
1781         dbg("%s - download successful", __func__);
1782
1783         return 0;
1784 }