drivers/usb/serial/whiteheat.c

   1 /*
   2  * USB ConnectTech WhiteHEAT driver
   3  *
   4  *      Copyright (C) 2002
   5  *          Connect Tech Inc.
   6  *
   7  *      Copyright (C) 1999 - 2001
   8  *          Greg Kroah-Hartman (greg@kroah.com)
   9  *
  10  *      This program is free software; you can redistribute it and/or modify
  11  *      it under the terms of the GNU General Public License as published by
  12  *      the Free Software Foundation; either version 2 of the License, or
  13  *      (at your option) any later version.
  14  *
  15  * See Documentation/usb/usb-serial.txt for more information on using this
  16  * driver
  17  *
  18  * (10/09/2002) Stuart MacDonald (stuartm@connecttech.com)
  19  *      Upgrade to full working driver
  20  *
  21  * (05/30/2001) gkh
  22  *      switched from using spinlock to a semaphore, which fixes lots of
  23  *      problems.
  24  *
  25  * (04/08/2001) gb
  26  *      Identify version on module load.
  27  *
  28  * 2001_Mar_19 gkh
  29  *      Fixed MOD_INC and MOD_DEC logic, the ability to open a port more
  30  *      than once, and the got the proper usb_device_id table entries so
  31  *      the driver works again.
  32  *
  33  * (11/01/2000) Adam J. Richter
  34  *      usb_device_id table support
  35  *
  36  * (10/05/2000) gkh
  37  *      Fixed bug with urb->dev not being set properly, now that the usb
  38  *      core needs it.
  39  *
  40  * (10/03/2000) smd
  41  *      firmware is improved to guard against crap sent to device
  42  *      firmware now replies CMD_FAILURE on bad things
  43  *      read_callback fix you provided for private info struct
  44  *      command_finished now indicates success or fail
  45  *      setup_port struct now packed to avoid gcc padding
  46  *      firmware uses 1 based port numbering, driver now handles that
  47  *
  48  * (09/11/2000) gkh
  49  *      Removed DEBUG #ifdefs with call to usb_serial_debug_data
  50  *
  51  * (07/19/2000) gkh
  52  *      Added module_init and module_exit functions to handle the fact that this
  53  *      driver is a loadable module now.
  54  *      Fixed bug with port->minor that was found by Al Borchers
  55  *
  56  * (07/04/2000) gkh
  57  *      Added support for port settings. Baud rate can now be changed. Line
  58  *      signals are not transferred to and from the tty layer yet, but things
  59  *      seem to be working well now.
  60  *
  61  * (05/04/2000) gkh
  62  *      First cut at open and close commands. Data can flow through the ports at
  63  *      default speeds now.
  64  *
  65  * (03/26/2000) gkh
  66  *      Split driver up into device specific pieces.
  67  *
  68  */
  69
  70 #include <linux/kernel.h>
  71 #include <linux/errno.h>
  72 #include <linux/init.h>
  73 #include <linux/slab.h>
  74 #include <linux/tty.h>
  75 #include <linux/tty_driver.h>
  76 #include <linux/tty_flip.h>
  77 #include <linux/module.h>
  78 #include <linux/spinlock.h>
  79 #include <linux/mutex.h>
  80 #include <linux/uaccess.h>
  81 #include <asm/termbits.h>
  82 #include <linux/usb.h>
  83 #include <linux/serial_reg.h>
  84 #include <linux/serial.h>
  85 #include <linux/usb/serial.h>
  86 #include <linux/firmware.h>
  87 #include <linux/ihex.h>
  88 #include "whiteheat.h"                  /* WhiteHEAT specific commands */
  89
  90 static int debug;
  91
  92 #ifndef CMSPAR
  93 #define CMSPAR 0
  94 #endif
  95
  96 /*
  97  * Version Information
  98  */
  99 #define DRIVER_VERSION "v2.0"
 100 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>"
 101 #define DRIVER_DESC "USB ConnectTech WhiteHEAT driver"
 102
 103 #define CONNECT_TECH_VENDOR_ID          0x0710
 104 #define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001
 105 #define CONNECT_TECH_WHITE_HEAT_ID      0x8001
 106
 107 /*
 108    ID tables for whiteheat are unusual, because we want to different
 109    things for different versions of the device.  Eventually, this
 110    will be doable from a single table.  But, for now, we define two
 111    separate ID tables, and then a third table that combines them
 112    just for the purpose of exporting the autoloading information.
 113 */
 114 static struct usb_device_id id_table_std [] = {
 115         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
 116         { }                                             /* Terminating entry */
 117 };
 118
 119 static struct usb_device_id id_table_prerenumeration [] = {
 120         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
 121         { }                                             /* Terminating entry */
 122 };
 123
 124 static struct usb_device_id id_table_combined [] = {
 125         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
 126         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
 127         { }                                             /* Terminating entry */
 128 };
 129
 130 MODULE_DEVICE_TABLE(usb, id_table_combined);
 131
 132 static struct usb_driver whiteheat_driver = {
 133         .name =         "whiteheat",
 134         .probe =        usb_serial_probe,
 135         .disconnect =   usb_serial_disconnect,
 136         .id_table =     id_table_combined,
 137         .no_dynamic_id =        1,
 138 };
 139
 140 /* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */
 141 static int  whiteheat_firmware_download(struct usb_serial *serial,
 142                                         const struct usb_device_id *id);
 143 static int  whiteheat_firmware_attach(struct usb_serial *serial);
 144
 145 /* function prototypes for the Connect Tech WhiteHEAT serial converter */
 146 static int  whiteheat_attach(struct usb_serial *serial);
 147 static void whiteheat_release(struct usb_serial *serial);
 148 static int  whiteheat_open(struct tty_struct *tty,
 149                         struct usb_serial_port *port);
 150 static void whiteheat_close(struct usb_serial_port *port);
 151 static int  whiteheat_write(struct tty_struct *tty,
 152                         struct usb_serial_port *port,
 153                         const unsigned char *buf, int count);
 154 static int  whiteheat_write_room(struct tty_struct *tty);
 155 static int  whiteheat_ioctl(struct tty_struct *tty, struct file *file,
 156                         unsigned int cmd, unsigned long arg);
 157 static void whiteheat_set_termios(struct tty_struct *tty,
 158                         struct usb_serial_port *port, struct ktermios *old);
 159 static int  whiteheat_tiocmget(struct tty_struct *tty, struct file *file);
 160 static int  whiteheat_tiocmset(struct tty_struct *tty, struct file *file,
 161                         unsigned int set, unsigned int clear);
 162 static void whiteheat_break_ctl(struct tty_struct *tty, int break_state);
 163 static int  whiteheat_chars_in_buffer(struct tty_struct *tty);
 164 static void whiteheat_throttle(struct tty_struct *tty);
 165 static void whiteheat_unthrottle(struct tty_struct *tty);
 166 static void whiteheat_read_callback(struct urb *urb);
 167 static void whiteheat_write_callback(struct urb *urb);
 168
 169 static struct usb_serial_driver whiteheat_fake_device = {
 170         .driver = {
 171                 .owner =        THIS_MODULE,
 172                 .name =         "whiteheatnofirm",
 173         },
 174         .description =          "Connect Tech - WhiteHEAT - (prerenumeration)",
 175         .usb_driver =           &whiteheat_driver,
 176         .id_table =             id_table_prerenumeration,
 177         .num_ports =            1,
 178         .probe =                whiteheat_firmware_download,
 179         .attach =               whiteheat_firmware_attach,
 180 };
 181
 182 static struct usb_serial_driver whiteheat_device = {
 183         .driver = {
 184                 .owner =        THIS_MODULE,
 185                 .name =         "whiteheat",
 186         },
 187         .description =          "Connect Tech - WhiteHEAT",
 188         .usb_driver =           &whiteheat_driver,
 189         .id_table =             id_table_std,
 190         .num_ports =            4,
 191         .attach =               whiteheat_attach,
 192         .release =              whiteheat_release,
 193         .open =                 whiteheat_open,
 194         .close =                whiteheat_close,
 195         .write =                whiteheat_write,
 196         .write_room =           whiteheat_write_room,
 197         .ioctl =                whiteheat_ioctl,
 198         .set_termios =          whiteheat_set_termios,
 199         .break_ctl =            whiteheat_break_ctl,
 200         .tiocmget =             whiteheat_tiocmget,
 201         .tiocmset =             whiteheat_tiocmset,
 202         .chars_in_buffer =      whiteheat_chars_in_buffer,
 203         .throttle =             whiteheat_throttle,
 204         .unthrottle =           whiteheat_unthrottle,
 205         .read_bulk_callback =   whiteheat_read_callback,
 206         .write_bulk_callback =  whiteheat_write_callback,
 207 };
 208
 209
 210 struct whiteheat_command_private {
 211         struct mutex            mutex;
 212         __u8                    port_running;
 213         __u8                    command_finished;
 214         wait_queue_head_t       wait_command; /* for handling sleeping whilst
 215                                                  waiting for a command to
 216                                                  finish */
 217         __u8                    result_buffer[64];
 218 };
 219
 220
 221 #define THROTTLED               0x01
 222 #define ACTUALLY_THROTTLED      0x02
 223
 224 static int urb_pool_size = 8;
 225
 226 struct whiteheat_urb_wrap {
 227         struct list_head        list;
 228         struct urb              *urb;
 229 };
 230
 231 struct whiteheat_private {
 232         spinlock_t              lock;
 233         __u8                    flags;
 234         __u8                    mcr;            /* FIXME: no locking on mcr */
 235         struct list_head        rx_urbs_free;
 236         struct list_head        rx_urbs_submitted;
 237         struct list_head        rx_urb_q;
 238         struct work_struct      rx_work;
 239         struct usb_serial_port  *port;
 240         struct list_head        tx_urbs_free;
 241         struct list_head        tx_urbs_submitted;
 242         struct mutex            deathwarrant;
 243 };
 244
 245
 246 /* local function prototypes */
 247 static int start_command_port(struct usb_serial *serial);
 248 static void stop_command_port(struct usb_serial *serial);
 249 static void command_port_write_callback(struct urb *urb);
 250 static void command_port_read_callback(struct urb *urb);
 251
 252 static int start_port_read(struct usb_serial_port *port);
 253 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb,
 254                                                 struct list_head *head);
 255 static struct list_head *list_first(struct list_head *head);
 256 static void rx_data_softint(struct work_struct *work);
 257
 258 static int firm_send_command(struct usb_serial_port *port, __u8 command,
 259                                                 __u8 *data, __u8 datasize);
 260 static int firm_open(struct usb_serial_port *port);
 261 static int firm_close(struct usb_serial_port *port);
 262 static void firm_setup_port(struct tty_struct *tty);
 263 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
 264 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
 265 static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
 266 static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
 267 static int firm_get_dtr_rts(struct usb_serial_port *port);
 268 static int firm_report_tx_done(struct usb_serial_port *port);
 269
 270
 271 #define COMMAND_PORT            4
 272 #define COMMAND_TIMEOUT         (2*HZ)  /* 2 second timeout for a command */
 273 #define COMMAND_TIMEOUT_MS      2000
 274 #define CLOSING_DELAY           (30 * HZ)
 275
 276
 277 /*****************************************************************************
 278  * Connect Tech's White Heat prerenumeration driver functions
 279  *****************************************************************************/
 280
 281 /* steps to download the firmware to the WhiteHEAT device:
 282  - hold the reset (by writing to the reset bit of the CPUCS register)
 283  - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
 284  - release the reset (by writing to the CPUCS register)
 285  - download the WH.HEX file for all addresses greater than 0x1b3f using
 286    VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
 287  - hold the reset
 288  - download the WH.HEX file for all addresses less than 0x1b40 using
 289    VENDOR_REQUEST_ANCHOR_LOAD
 290  - release the reset
 291  - device renumerated itself and comes up as new device id with all
 292    firmware download completed.
 293 */
 294 static int whiteheat_firmware_download(struct usb_serial *serial,
 295                                         const struct usb_device_id *id)
 296 {
 297         int response, ret = -ENOENT;
 298         const struct firmware *loader_fw = NULL, *firmware_fw = NULL;
 299         const struct ihex_binrec *record;
 300
 301         dbg("%s", __func__);
 302
 303         if (request_ihex_firmware(&firmware_fw, "whiteheat.fw",
 304                                   &serial->dev->dev)) {
 305                 dev_err(&serial->dev->dev,
 306                         "%s - request \"whiteheat.fw\" failed\n", __func__);
 307                 goto out;
 308         }
 309         if (request_ihex_firmware(&loader_fw, "whiteheat_loader.fw",
 310                              &serial->dev->dev)) {
 311                 dev_err(&serial->dev->dev,
 312                         "%s - request \"whiteheat_loader.fw\" failed\n",
 313                         __func__);
 314                 goto out;
 315         }
 316         ret = 0;
 317         response = ezusb_set_reset (serial, 1);
 318
 319         record = (const struct ihex_binrec *)loader_fw->data;
 320         while (record) {
 321                 response = ezusb_writememory (serial, be32_to_cpu(record->addr),
 322                                               (unsigned char *)record->data,
 323                                               be16_to_cpu(record->len), 0xa0);
 324                 if (response < 0) {
 325                         dev_err(&serial->dev->dev, "%s - ezusb_writememory "
 326                                 "failed for loader (%d %04X %p %d)\n",
 327                                 __func__, response, be32_to_cpu(record->addr),
 328                                 record->data, be16_to_cpu(record->len));
 329                         break;
 330                 }
 331                 record = ihex_next_binrec(record);
 332         }
 333
 334         response = ezusb_set_reset(serial, 0);
 335
 336         record = (const struct ihex_binrec *)firmware_fw->data;
 337         while (record && be32_to_cpu(record->addr) < 0x1b40)
 338                 record = ihex_next_binrec(record);
 339         while (record) {
 340                 response = ezusb_writememory (serial, be32_to_cpu(record->addr),
 341                                               (unsigned char *)record->data,
 342                                               be16_to_cpu(record->len), 0xa3);
 343                 if (response < 0) {
 344                         dev_err(&serial->dev->dev, "%s - ezusb_writememory "
 345                                 "failed for first firmware step "
 346                                 "(%d %04X %p %d)\n", __func__, response,
 347                                 be32_to_cpu(record->addr), record->data,
 348                                 be16_to_cpu(record->len));
 349                         break;
 350                 }
 351                 ++record;
 352         }
 353
 354         response = ezusb_set_reset(serial, 1);
 355
 356         record = (const struct ihex_binrec *)firmware_fw->data;
 357         while (record && be32_to_cpu(record->addr) < 0x1b40) {
 358                 response = ezusb_writememory (serial, be32_to_cpu(record->addr),
 359                                               (unsigned char *)record->data,
 360                                               be16_to_cpu(record->len), 0xa0);
 361                 if (response < 0) {
 362                         dev_err(&serial->dev->dev, "%s - ezusb_writememory "
 363                                 "failed for second firmware step "
 364                                 "(%d %04X %p %d)\n", __func__, response,
 365                                 be32_to_cpu(record->addr), record->data,
 366                                 be16_to_cpu(record->len));
 367                         break;
 368                 }
 369                 ++record;
 370         }
 371         ret = 0;
 372         response = ezusb_set_reset (serial, 0);
 373  out:
 374         release_firmware(loader_fw);
 375         release_firmware(firmware_fw);
 376         return ret;
 377 }
 378
 379
 380 static int whiteheat_firmware_attach(struct usb_serial *serial)
 381 {
 382         /* We want this device to fail to have a driver assigned to it */
 383         return 1;
 384 }
 385
 386
 387 /*****************************************************************************
 388  * Connect Tech's White Heat serial driver functions
 389  *****************************************************************************/
 390 static int whiteheat_attach(struct usb_serial *serial)
 391 {
 392         struct usb_serial_port *command_port;
 393         struct whiteheat_command_private *command_info;
 394         struct usb_serial_port *port;
 395         struct whiteheat_private *info;
 396         struct whiteheat_hw_info *hw_info;
 397         int pipe;
 398         int ret;
 399         int alen;
 400         __u8 *command;
 401         __u8 *result;
 402         int i;
 403         int j;
 404         struct urb *urb;
 405         int buf_size;
 406         struct whiteheat_urb_wrap *wrap;
 407         struct list_head *tmp;
 408
 409         command_port = serial->port[COMMAND_PORT];
 410
 411         pipe = usb_sndbulkpipe(serial->dev,
 412                         command_port->bulk_out_endpointAddress);
 413         command = kmalloc(2, GFP_KERNEL);
 414         if (!command)
 415                 goto no_command_buffer;
 416         command[0] = WHITEHEAT_GET_HW_INFO;
 417         command[1] = 0;
 418
 419         result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
 420         if (!result)
 421                 goto no_result_buffer;
 422         /*
 423          * When the module is reloaded the firmware is still there and
 424          * the endpoints are still in the usb core unchanged. This is the
 425          * unlinking bug in disguise. Same for the call below.
 426          */
 427         usb_clear_halt(serial->dev, pipe);
 428         ret = usb_bulk_msg(serial->dev, pipe, command, 2,
 429                                                 &alen, COMMAND_TIMEOUT_MS);
 430         if (ret) {
 431                 dev_err(&serial->dev->dev, "%s: Couldn't send command [%d]\n",
 432                         serial->type->description, ret);
 433                 goto no_firmware;
 434         } else if (alen != 2) {
 435                 dev_err(&serial->dev->dev, "%s: Send command incomplete [%d]\n",
 436                         serial->type->description, alen);
 437                 goto no_firmware;
 438         }
 439
 440         pipe = usb_rcvbulkpipe(serial->dev,
 441                                 command_port->bulk_in_endpointAddress);
 442         /* See the comment on the usb_clear_halt() above */
 443         usb_clear_halt(serial->dev, pipe);
 444         ret = usb_bulk_msg(serial->dev, pipe, result,
 445                         sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
 446         if (ret) {
 447                 dev_err(&serial->dev->dev, "%s: Couldn't get results [%d]\n",
 448                         serial->type->description, ret);
 449                 goto no_firmware;
 450         } else if (alen != sizeof(*hw_info) + 1) {
 451                 dev_err(&serial->dev->dev, "%s: Get results incomplete [%d]\n",
 452                         serial->type->description, alen);
 453                 goto no_firmware;
 454         } else if (result[0] != command[0]) {
 455                 dev_err(&serial->dev->dev, "%s: Command failed [%d]\n",
 456                         serial->type->description, result[0]);
 457                 goto no_firmware;
 458         }
 459
 460         hw_info = (struct whiteheat_hw_info *)&result[1];
 461
 462         dev_info(&serial->dev->dev, "%s: Driver %s: Firmware v%d.%02d\n",
 463                  serial->type->description, DRIVER_VERSION,
 464                  hw_info->sw_major_rev, hw_info->sw_minor_rev);
 465
 466         for (i = 0; i < serial->num_ports; i++) {
 467                 port = serial->port[i];
 468
 469                 info = kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL);
 470                 if (info == NULL) {
 471                         dev_err(&port->dev,
 472                                 "%s: Out of memory for port structures\n",
 473                                 serial->type->description);
 474                         goto no_private;
 475                 }
 476
 477                 spin_lock_init(&info->lock);
 478                 mutex_init(&info->deathwarrant);
 479                 info->flags = 0;
 480                 info->mcr = 0;
 481                 INIT_WORK(&info->rx_work, rx_data_softint);
 482                 info->port = port;
 483
 484                 INIT_LIST_HEAD(&info->rx_urbs_free);
 485                 INIT_LIST_HEAD(&info->rx_urbs_submitted);
 486                 INIT_LIST_HEAD(&info->rx_urb_q);
 487                 INIT_LIST_HEAD(&info->tx_urbs_free);
 488                 INIT_LIST_HEAD(&info->tx_urbs_submitted);
 489
 490                 for (j = 0; j < urb_pool_size; j++) {
 491                         urb = usb_alloc_urb(0, GFP_KERNEL);
 492                         if (!urb) {
 493                                 dev_err(&port->dev, "No free urbs available\n");
 494                                 goto no_rx_urb;
 495                         }
 496                         buf_size = port->read_urb->transfer_buffer_length;
 497                         urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
 498                         if (!urb->transfer_buffer) {
 499                                 dev_err(&port->dev,
 500                                         "Couldn't allocate urb buffer\n");
 501                                 goto no_rx_buf;
 502                         }
 503                         wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
 504                         if (!wrap) {
 505                                 dev_err(&port->dev,
 506                                         "Couldn't allocate urb wrapper\n");
 507                                 goto no_rx_wrap;
 508                         }
 509                         usb_fill_bulk_urb(urb, serial->dev,
 510                                         usb_rcvbulkpipe(serial->dev,
 511                                                 port->bulk_in_endpointAddress),
 512                                         urb->transfer_buffer, buf_size,
 513                                         whiteheat_read_callback, port);
 514                         wrap->urb = urb;
 515                         list_add(&wrap->list, &info->rx_urbs_free);
 516
 517                         urb = usb_alloc_urb(0, GFP_KERNEL);
 518                         if (!urb) {
 519                                 dev_err(&port->dev, "No free urbs available\n");
 520                                 goto no_tx_urb;
 521                         }
 522                         buf_size = port->write_urb->transfer_buffer_length;
 523                         urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
 524                         if (!urb->transfer_buffer) {
 525                                 dev_err(&port->dev,
 526                                         "Couldn't allocate urb buffer\n");
 527                                 goto no_tx_buf;
 528                         }
 529                         wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
 530                         if (!wrap) {
 531                                 dev_err(&port->dev,
 532                                         "Couldn't allocate urb wrapper\n");
 533                                 goto no_tx_wrap;
 534                         }
 535                         usb_fill_bulk_urb(urb, serial->dev,
 536                                         usb_sndbulkpipe(serial->dev,
 537                                                 port->bulk_out_endpointAddress),
 538                                         urb->transfer_buffer, buf_size,
 539                                         whiteheat_write_callback, port);
 540                         wrap->urb = urb;
 541                         list_add(&wrap->list, &info->tx_urbs_free);
 542                 }
 543
 544                 usb_set_serial_port_data(port, info);
 545         }
 546
 547         command_info = kmalloc(sizeof(struct whiteheat_command_private),
 548                                                                 GFP_KERNEL);
 549         if (command_info == NULL) {
 550                 dev_err(&serial->dev->dev,
 551                         "%s: Out of memory for port structures\n",
 552                         serial->type->description);
 553                 goto no_command_private;
 554         }
 555
 556         mutex_init(&command_info->mutex);
 557         command_info->port_running = 0;
 558         init_waitqueue_head(&command_info->wait_command);
 559         usb_set_serial_port_data(command_port, command_info);
 560         command_port->write_urb->complete = command_port_write_callback;
 561         command_port->read_urb->complete = command_port_read_callback;
 562         kfree(result);
 563         kfree(command);
 564
 565         return 0;
 566
 567 no_firmware:
 568         /* Firmware likely not running */
 569         dev_err(&serial->dev->dev,
 570                 "%s: Unable to retrieve firmware version, try replugging\n",
 571                 serial->type->description);
 572         dev_err(&serial->dev->dev,
 573                 "%s: If the firmware is not running (status led not blinking)\n",
 574                 serial->type->description);
 575         dev_err(&serial->dev->dev,
 576                 "%s: please contact support@connecttech.com\n",
 577                 serial->type->description);
 578         kfree(result);
 579         return -ENODEV;
 580
 581 no_command_private:
 582         for (i = serial->num_ports - 1; i >= 0; i--) {
 583                 port = serial->port[i];
 584                 info = usb_get_serial_port_data(port);
 585                 for (j = urb_pool_size - 1; j >= 0; j--) {
 586                         tmp = list_first(&info->tx_urbs_free);
 587                         list_del(tmp);
 588                         wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
 589                         urb = wrap->urb;
 590                         kfree(wrap);
 591 no_tx_wrap:
 592                         kfree(urb->transfer_buffer);
 593 no_tx_buf:
 594                         usb_free_urb(urb);
 595 no_tx_urb:
 596                         tmp = list_first(&info->rx_urbs_free);
 597                         list_del(tmp);
 598                         wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
 599                         urb = wrap->urb;
 600                         kfree(wrap);
 601 no_rx_wrap:
 602                         kfree(urb->transfer_buffer);
 603 no_rx_buf:
 604                         usb_free_urb(urb);
 605 no_rx_urb:
 606                         ;
 607                 }
 608                 kfree(info);
 609 no_private:
 610                 ;
 611         }
 612         kfree(result);
 613 no_result_buffer:
 614         kfree(command);
 615 no_command_buffer:
 616         return -ENOMEM;
 617 }
 618
 619
 620 static void whiteheat_release(struct usb_serial *serial)
 621 {
 622         struct usb_serial_port *command_port;
 623         struct usb_serial_port *port;
 624         struct whiteheat_private *info;
 625         struct whiteheat_urb_wrap *wrap;
 626         struct urb *urb;
 627         struct list_head *tmp;
 628         struct list_head *tmp2;
 629         int i;
 630
 631         dbg("%s", __func__);
 632
 633         /* free up our private data for our command port */
 634         command_port = serial->port[COMMAND_PORT];
 635         kfree(usb_get_serial_port_data(command_port));
 636
 637         for (i = 0; i < serial->num_ports; i++) {
 638                 port = serial->port[i];
 639                 info = usb_get_serial_port_data(port);
 640                 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
 641                         list_del(tmp);
 642                         wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
 643                         urb = wrap->urb;
 644                         kfree(wrap);
 645                         kfree(urb->transfer_buffer);
 646                         usb_free_urb(urb);
 647                 }
 648                 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) {
 649                         list_del(tmp);
 650                         wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
 651                         urb = wrap->urb;
 652                         kfree(wrap);
 653                         kfree(urb->transfer_buffer);
 654                         usb_free_urb(urb);
 655                 }
 656                 kfree(info);
 657         }
 658
 659         return;
 660 }
 661
 662 static int whiteheat_open(struct tty_struct *tty, struct usb_serial_port *port)
 663 {
 664         int             retval = 0;
 665
 666         dbg("%s - port %d", __func__, port->number);
 667
 668         retval = start_command_port(port->serial);
 669         if (retval)
 670                 goto exit;
 671
 672         if (tty)
 673                 tty->low_latency = 1;
 674
 675         /* send an open port command */
 676         retval = firm_open(port);
 677         if (retval) {
 678                 stop_command_port(port->serial);
 679                 goto exit;
 680         }
 681
 682         retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX);
 683         if (retval) {
 684                 firm_close(port);
 685                 stop_command_port(port->serial);
 686                 goto exit;
 687         }
 688
 689         if (tty)
 690                 firm_setup_port(tty);
 691
 692         /* Work around HCD bugs */
 693         usb_clear_halt(port->serial->dev, port->read_urb->pipe);
 694         usb_clear_halt(port->serial->dev, port->write_urb->pipe);
 695
 696         /* Start reading from the device */
 697         retval = start_port_read(port);
 698         if (retval) {
 699                 dev_err(&port->dev,
 700                         "%s - failed submitting read urb, error %d\n",
 701                         __func__, retval);
 702                 firm_close(port);
 703                 stop_command_port(port->serial);
 704                 goto exit;
 705         }
 706
 707 exit:
 708         dbg("%s - exit, retval = %d", __func__, retval);
 709         return retval;
 710 }
 711
 712
 713 static void whiteheat_close(struct usb_serial_port *port)
 714 {
 715         struct whiteheat_private *info = usb_get_serial_port_data(port);
 716         struct whiteheat_urb_wrap *wrap;
 717         struct urb *urb;
 718         struct list_head *tmp;
 719         struct list_head *tmp2;
 720
 721         dbg("%s - port %d", __func__, port->number);
 722
 723         firm_report_tx_done(port);
 724         firm_close(port);
 725
 726         /* shutdown our bulk reads and writes */
 727         mutex_lock(&info->deathwarrant);
 728         spin_lock_irq(&info->lock);
 729         list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
 730                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
 731                 urb = wrap->urb;
 732                 list_del(tmp);
 733                 spin_unlock_irq(&info->lock);
 734                 usb_kill_urb(urb);
 735                 spin_lock_irq(&info->lock);
 736                 list_add(tmp, &info->rx_urbs_free);
 737         }
 738         list_for_each_safe(tmp, tmp2, &info->rx_urb_q)
 739                 list_move(tmp, &info->rx_urbs_free);
 740         list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) {
 741                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
 742                 urb = wrap->urb;
 743                 list_del(tmp);
 744                 spin_unlock_irq(&info->lock);
 745                 usb_kill_urb(urb);
 746                 spin_lock_irq(&info->lock);
 747                 list_add(tmp, &info->tx_urbs_free);
 748         }
 749         spin_unlock_irq(&info->lock);
 750         mutex_unlock(&info->deathwarrant);
 751         stop_command_port(port->serial);
 752 }
 753
 754
 755 static int whiteheat_write(struct tty_struct *tty,
 756         struct usb_serial_port *port, const unsigned char *buf, int count)
 757 {
 758         struct usb_serial *serial = port->serial;
 759         struct whiteheat_private *info = usb_get_serial_port_data(port);
 760         struct whiteheat_urb_wrap *wrap;
 761         struct urb *urb;
 762         int result;
 763         int bytes;
 764         int sent = 0;
 765         unsigned long flags;
 766         struct list_head *tmp;
 767
 768         dbg("%s - port %d", __func__, port->number);
 769
 770         if (count == 0) {
 771                 dbg("%s - write request of 0 bytes", __func__);
 772                 return (0);
 773         }
 774
 775         while (count) {
 776                 spin_lock_irqsave(&info->lock, flags);
 777                 if (list_empty(&info->tx_urbs_free)) {
 778                         spin_unlock_irqrestore(&info->lock, flags);
 779                         break;
 780                 }
 781                 tmp = list_first(&info->tx_urbs_free);
 782                 list_del(tmp);
 783                 spin_unlock_irqrestore(&info->lock, flags);
 784
 785                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
 786                 urb = wrap->urb;
 787                 bytes = (count > port->bulk_out_size) ?
 788                                         port->bulk_out_size : count;
 789                 memcpy(urb->transfer_buffer, buf + sent, bytes);
 790
 791                 usb_serial_debug_data(debug, &port->dev,
 792                                 __func__, bytes, urb->transfer_buffer);
 793
 794                 urb->dev = serial->dev;
 795                 urb->transfer_buffer_length = bytes;
 796                 result = usb_submit_urb(urb, GFP_ATOMIC);
 797                 if (result) {
 798                         dev_err(&port->dev,
 799                                 "%s - failed submitting write urb, error %d\n",
 800                                 __func__, result);
 801                         sent = result;
 802                         spin_lock_irqsave(&info->lock, flags);
 803                         list_add(tmp, &info->tx_urbs_free);
 804                         spin_unlock_irqrestore(&info->lock, flags);
 805                         break;
 806                 } else {
 807                         sent += bytes;
 808                         count -= bytes;
 809                         spin_lock_irqsave(&info->lock, flags);
 810                         list_add(tmp, &info->tx_urbs_submitted);
 811                         spin_unlock_irqrestore(&info->lock, flags);
 812                 }
 813         }
 814
 815         return sent;
 816 }
 817
 818 static int whiteheat_write_room(struct tty_struct *tty)
 819 {
 820         struct usb_serial_port *port = tty->driver_data;
 821         struct whiteheat_private *info = usb_get_serial_port_data(port);
 822         struct list_head *tmp;
 823         int room = 0;
 824         unsigned long flags;
 825
 826         dbg("%s - port %d", __func__, port->number);
 827
 828         spin_lock_irqsave(&info->lock, flags);
 829         list_for_each(tmp, &info->tx_urbs_free)
 830                 room++;
 831         spin_unlock_irqrestore(&info->lock, flags);
 832         room *= port->bulk_out_size;
 833
 834         dbg("%s - returns %d", __func__, room);
 835         return (room);
 836 }
 837
 838 static int whiteheat_tiocmget(struct tty_struct *tty, struct file *file)
 839 {
 840         struct usb_serial_port *port = tty->driver_data;
 841         struct whiteheat_private *info = usb_get_serial_port_data(port);
 842         unsigned int modem_signals = 0;
 843
 844         dbg("%s - port %d", __func__, port->number);
 845
 846         firm_get_dtr_rts(port);
 847         if (info->mcr & UART_MCR_DTR)
 848                 modem_signals |= TIOCM_DTR;
 849         if (info->mcr & UART_MCR_RTS)
 850                 modem_signals |= TIOCM_RTS;
 851
 852         return modem_signals;
 853 }
 854
 855 static int whiteheat_tiocmset(struct tty_struct *tty, struct file *file,
 856                                unsigned int set, unsigned int clear)
 857 {
 858         struct usb_serial_port *port = tty->driver_data;
 859         struct whiteheat_private *info = usb_get_serial_port_data(port);
 860
 861         dbg("%s - port %d", __func__, port->number);
 862
 863         if (set & TIOCM_RTS)
 864                 info->mcr |= UART_MCR_RTS;
 865         if (set & TIOCM_DTR)
 866                 info->mcr |= UART_MCR_DTR;
 867
 868         if (clear & TIOCM_RTS)
 869                 info->mcr &= ~UART_MCR_RTS;
 870         if (clear & TIOCM_DTR)
 871                 info->mcr &= ~UART_MCR_DTR;
 872
 873         firm_set_dtr(port, info->mcr & UART_MCR_DTR);
 874         firm_set_rts(port, info->mcr & UART_MCR_RTS);
 875         return 0;
 876 }
 877
 878
 879 static int whiteheat_ioctl(struct tty_struct *tty, struct file *file,
 880                                         unsigned int cmd, unsigned long arg)
 881 {
 882         struct usb_serial_port *port = tty->driver_data;
 883         struct serial_struct serstruct;
 884         void __user *user_arg = (void __user *)arg;
 885
 886         dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd);
 887
 888         switch (cmd) {
 889         case TIOCGSERIAL:
 890                 memset(&serstruct, 0, sizeof(serstruct));
 891                 serstruct.type = PORT_16654;
 892                 serstruct.line = port->serial->minor;
 893                 serstruct.port = port->number;
 894                 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 895                 serstruct.xmit_fifo_size = port->bulk_out_size;
 896                 serstruct.custom_divisor = 0;
 897                 serstruct.baud_base = 460800;
 898                 serstruct.close_delay = CLOSING_DELAY;
 899                 serstruct.closing_wait = CLOSING_DELAY;
 900
 901                 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
 902                         return -EFAULT;
 903                 break;
 904         default:
 905                 break;
 906         }
 907
 908         return -ENOIOCTLCMD;
 909 }
 910
 911
 912 static void whiteheat_set_termios(struct tty_struct *tty,
 913         struct usb_serial_port *port, struct ktermios *old_termios)
 914 {
 915         firm_setup_port(tty);
 916 }
 917
 918 static void whiteheat_break_ctl(struct tty_struct *tty, int break_state)
 919 {
 920         struct usb_serial_port *port = tty->driver_data;
 921         firm_set_break(port, break_state);
 922 }
 923
 924
 925 static int whiteheat_chars_in_buffer(struct tty_struct *tty)
 926 {
 927         struct usb_serial_port *port = tty->driver_data;
 928         struct whiteheat_private *info = usb_get_serial_port_data(port);
 929         struct list_head *tmp;
 930         struct whiteheat_urb_wrap *wrap;
 931         int chars = 0;
 932         unsigned long flags;
 933
 934         dbg("%s - port %d", __func__, port->number);
 935
 936         spin_lock_irqsave(&info->lock, flags);
 937         list_for_each(tmp, &info->tx_urbs_submitted) {
 938                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
 939                 chars += wrap->urb->transfer_buffer_length;
 940         }
 941         spin_unlock_irqrestore(&info->lock, flags);
 942
 943         dbg("%s - returns %d", __func__, chars);
 944         return chars;
 945 }
 946
 947
 948 static void whiteheat_throttle(struct tty_struct *tty)
 949 {
 950         struct usb_serial_port *port = tty->driver_data;
 951         struct whiteheat_private *info = usb_get_serial_port_data(port);
 952
 953         dbg("%s - port %d", __func__, port->number);
 954
 955         spin_lock_irq(&info->lock);
 956         info->flags |= THROTTLED;
 957         spin_unlock_irq(&info->lock);
 958
 959         return;
 960 }
 961
 962
 963 static void whiteheat_unthrottle(struct tty_struct *tty)
 964 {
 965         struct usb_serial_port *port = tty->driver_data;
 966         struct whiteheat_private *info = usb_get_serial_port_data(port);
 967         int actually_throttled;
 968
 969         dbg("%s - port %d", __func__, port->number);
 970
 971         spin_lock_irq(&info->lock);
 972         actually_throttled = info->flags & ACTUALLY_THROTTLED;
 973         info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
 974         spin_unlock_irq(&info->lock);
 975
 976         if (actually_throttled)
 977                 rx_data_softint(&info->rx_work);
 978
 979         return;
 980 }
 981
 982
 983 /*****************************************************************************
 984  * Connect Tech's White Heat callback routines
 985  *****************************************************************************/
 986 static void command_port_write_callback(struct urb *urb)
 987 {
 988         int status = urb->status;
 989
 990         dbg("%s", __func__);
 991
 992         if (status) {
 993                 dbg("nonzero urb status: %d", status);
 994                 return;
 995         }
 996 }
 997
 998
 999 static void command_port_read_callback(struct urb *urb)
1000 {
1001         struct usb_serial_port *command_port = urb->context;
1002         struct whiteheat_command_private *command_info;
1003         int status = urb->status;
1004         unsigned char *data = urb->transfer_buffer;
1005         int result;
1006
1007         dbg("%s", __func__);
1008
1009         command_info = usb_get_serial_port_data(command_port);
1010         if (!command_info) {
1011                 dbg("%s - command_info is NULL, exiting.", __func__);
1012                 return;
1013         }
1014         if (status) {
1015                 dbg("%s - nonzero urb status: %d", __func__, status);
1016                 if (status != -ENOENT)
1017                         command_info->command_finished = WHITEHEAT_CMD_FAILURE;
1018                 wake_up(&command_info->wait_command);
1019                 return;
1020         }
1021
1022         usb_serial_debug_data(debug, &command_port->dev,
1023                                 __func__, urb->actual_length, data);
1024
1025         if (data[0] == WHITEHEAT_CMD_COMPLETE) {
1026                 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1027                 wake_up(&command_info->wait_command);
1028         } else if (data[0] == WHITEHEAT_CMD_FAILURE) {
1029                 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
1030                 wake_up(&command_info->wait_command);
1031         } else if (data[0] == WHITEHEAT_EVENT) {
1032                 /* These are unsolicited reports from the firmware, hence no
1033                    waiting command to wakeup */
1034                 dbg("%s - event received", __func__);
1035         } else if (data[0] == WHITEHEAT_GET_DTR_RTS) {
1036                 memcpy(command_info->result_buffer, &data[1],
1037                                                 urb->actual_length - 1);
1038                 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1039                 wake_up(&command_info->wait_command);
1040         } else
1041                 dbg("%s - bad reply from firmware", __func__);
1042
1043         /* Continue trying to always read */
1044         command_port->read_urb->dev = command_port->serial->dev;
1045         result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
1046         if (result)
1047                 dbg("%s - failed resubmitting read urb, error %d",
1048                         __func__, result);
1049 }
1050
1051
1052 static void whiteheat_read_callback(struct urb *urb)
1053 {
1054         struct usb_serial_port *port = urb->context;
1055         struct whiteheat_urb_wrap *wrap;
1056         unsigned char *data = urb->transfer_buffer;
1057         struct whiteheat_private *info = usb_get_serial_port_data(port);
1058         int status = urb->status;
1059
1060         dbg("%s - port %d", __func__, port->number);
1061
1062         spin_lock(&info->lock);
1063         wrap = urb_to_wrap(urb, &info->rx_urbs_submitted);
1064         if (!wrap) {
1065                 spin_unlock(&info->lock);
1066                 dev_err(&port->dev, "%s - Not my urb!\n", __func__);
1067                 return;
1068         }
1069         list_del(&wrap->list);
1070         spin_unlock(&info->lock);
1071
1072         if (status) {
1073                 dbg("%s - nonzero read bulk status received: %d",
1074                     __func__, status);
1075                 spin_lock(&info->lock);
1076                 list_add(&wrap->list, &info->rx_urbs_free);
1077                 spin_unlock(&info->lock);
1078                 return;
1079         }
1080
1081         usb_serial_debug_data(debug, &port->dev,
1082                                 __func__, urb->actual_length, data);
1083
1084         spin_lock(&info->lock);
1085         list_add_tail(&wrap->list, &info->rx_urb_q);
1086         if (info->flags & THROTTLED) {
1087                 info->flags |= ACTUALLY_THROTTLED;
1088                 spin_unlock(&info->lock);
1089                 return;
1090         }
1091         spin_unlock(&info->lock);
1092
1093         schedule_work(&info->rx_work);
1094 }
1095
1096
1097 static void whiteheat_write_callback(struct urb *urb)
1098 {
1099         struct usb_serial_port *port = urb->context;
1100         struct whiteheat_private *info = usb_get_serial_port_data(port);
1101         struct whiteheat_urb_wrap *wrap;
1102         int status = urb->status;
1103
1104         dbg("%s - port %d", __func__, port->number);
1105
1106         spin_lock(&info->lock);
1107         wrap = urb_to_wrap(urb, &info->tx_urbs_submitted);
1108         if (!wrap) {
1109                 spin_unlock(&info->lock);
1110                 dev_err(&port->dev, "%s - Not my urb!\n", __func__);
1111                 return;
1112         }
1113         list_move(&wrap->list, &info->tx_urbs_free);
1114         spin_unlock(&info->lock);
1115
1116         if (status) {
1117                 dbg("%s - nonzero write bulk status received: %d",
1118                     __func__, status);
1119                 return;
1120         }
1121
1122         usb_serial_port_softint(port);
1123 }
1124
1125
1126 /*****************************************************************************
1127  * Connect Tech's White Heat firmware interface
1128  *****************************************************************************/
1129 static int firm_send_command(struct usb_serial_port *port, __u8 command,
1130                                                 __u8 *data, __u8 datasize)
1131 {
1132         struct usb_serial_port *command_port;
1133         struct whiteheat_command_private *command_info;
1134         struct whiteheat_private *info;
1135         __u8 *transfer_buffer;
1136         int retval = 0;
1137         int t;
1138
1139         dbg("%s - command %d", __func__, command);
1140
1141         command_port = port->serial->port[COMMAND_PORT];
1142         command_info = usb_get_serial_port_data(command_port);
1143         mutex_lock(&command_info->mutex);
1144         command_info->command_finished = false;
1145
1146         transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
1147         transfer_buffer[0] = command;
1148         memcpy(&transfer_buffer[1], data, datasize);
1149         command_port->write_urb->transfer_buffer_length = datasize + 1;
1150         command_port->write_urb->dev = port->serial->dev;
1151         retval = usb_submit_urb(command_port->write_urb, GFP_NOIO);
1152         if (retval) {
1153                 dbg("%s - submit urb failed", __func__);
1154                 goto exit;
1155         }
1156
1157         /* wait for the command to complete */
1158         t = wait_event_timeout(command_info->wait_command,
1159                 (bool)command_info->command_finished, COMMAND_TIMEOUT);
1160         if (!t)
1161                 usb_kill_urb(command_port->write_urb);
1162
1163         if (command_info->command_finished == false) {
1164                 dbg("%s - command timed out.", __func__);
1165                 retval = -ETIMEDOUT;
1166                 goto exit;
1167         }
1168
1169         if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
1170                 dbg("%s - command failed.", __func__);
1171                 retval = -EIO;
1172                 goto exit;
1173         }
1174
1175         if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
1176                 dbg("%s - command completed.", __func__);
1177                 switch (command) {
1178                 case WHITEHEAT_GET_DTR_RTS:
1179                         info = usb_get_serial_port_data(port);
1180                         memcpy(&info->mcr, command_info->result_buffer,
1181                                         sizeof(struct whiteheat_dr_info));
1182                                 break;
1183                 }
1184         }
1185 exit:
1186         mutex_unlock(&command_info->mutex);
1187         return retval;
1188 }
1189
1190
1191 static int firm_open(struct usb_serial_port *port)
1192 {
1193         struct whiteheat_simple open_command;
1194
1195         open_command.port = port->number - port->serial->minor + 1;
1196         return firm_send_command(port, WHITEHEAT_OPEN,
1197                 (__u8 *)&open_command, sizeof(open_command));
1198 }
1199
1200
1201 static int firm_close(struct usb_serial_port *port)
1202 {
1203         struct whiteheat_simple close_command;
1204
1205         close_command.port = port->number - port->serial->minor + 1;
1206         return firm_send_command(port, WHITEHEAT_CLOSE,
1207                         (__u8 *)&close_command, sizeof(close_command));
1208 }
1209
1210
1211 static void firm_setup_port(struct tty_struct *tty)
1212 {
1213         struct usb_serial_port *port = tty->driver_data;
1214         struct whiteheat_port_settings port_settings;
1215         unsigned int cflag = tty->termios->c_cflag;
1216
1217         port_settings.port = port->number + 1;
1218
1219         /* get the byte size */
1220         switch (cflag & CSIZE) {
1221         case CS5:       port_settings.bits = 5;   break;
1222         case CS6:       port_settings.bits = 6;   break;
1223         case CS7:       port_settings.bits = 7;   break;
1224         default:
1225         case CS8:       port_settings.bits = 8;   break;
1226         }
1227         dbg("%s - data bits = %d", __func__, port_settings.bits);
1228
1229         /* determine the parity */
1230         if (cflag & PARENB)
1231                 if (cflag & CMSPAR)
1232                         if (cflag & PARODD)
1233                                 port_settings.parity = WHITEHEAT_PAR_MARK;
1234                         else
1235                                 port_settings.parity = WHITEHEAT_PAR_SPACE;
1236                 else
1237                         if (cflag & PARODD)
1238                                 port_settings.parity = WHITEHEAT_PAR_ODD;
1239                         else
1240                                 port_settings.parity = WHITEHEAT_PAR_EVEN;
1241         else
1242                 port_settings.parity = WHITEHEAT_PAR_NONE;
1243         dbg("%s - parity = %c", __func__, port_settings.parity);
1244
1245         /* figure out the stop bits requested */
1246         if (cflag & CSTOPB)
1247                 port_settings.stop = 2;
1248         else
1249                 port_settings.stop = 1;
1250         dbg("%s - stop bits = %d", __func__, port_settings.stop);
1251
1252         /* figure out the flow control settings */
1253         if (cflag & CRTSCTS)
1254                 port_settings.hflow = (WHITEHEAT_HFLOW_CTS |
1255                                                 WHITEHEAT_HFLOW_RTS);
1256         else
1257                 port_settings.hflow = WHITEHEAT_HFLOW_NONE;
1258         dbg("%s - hardware flow control = %s %s %s %s", __func__,
1259             (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
1260             (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
1261             (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
1262             (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
1263
1264         /* determine software flow control */
1265         if (I_IXOFF(tty))
1266                 port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
1267         else
1268                 port_settings.sflow = WHITEHEAT_SFLOW_NONE;
1269         dbg("%s - software flow control = %c", __func__, port_settings.sflow);
1270
1271         port_settings.xon = START_CHAR(tty);
1272         port_settings.xoff = STOP_CHAR(tty);
1273         dbg("%s - XON = %2x, XOFF = %2x",
1274                         __func__, port_settings.xon, port_settings.xoff);
1275
1276         /* get the baud rate wanted */
1277         port_settings.baud = tty_get_baud_rate(tty);
1278         dbg("%s - baud rate = %d", __func__, port_settings.baud);
1279
1280         /* fixme: should set validated settings */
1281         tty_encode_baud_rate(tty, port_settings.baud, port_settings.baud);
1282         /* handle any settings that aren't specified in the tty structure */
1283         port_settings.lloop = 0;
1284
1285         /* now send the message to the device */
1286         firm_send_command(port, WHITEHEAT_SETUP_PORT,
1287                         (__u8 *)&port_settings, sizeof(port_settings));
1288 }
1289
1290
1291 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff)
1292 {
1293         struct whiteheat_set_rdb rts_command;
1294
1295         rts_command.port = port->number - port->serial->minor + 1;
1296         rts_command.state = onoff;
1297         return firm_send_command(port, WHITEHEAT_SET_RTS,
1298                         (__u8 *)&rts_command, sizeof(rts_command));
1299 }
1300
1301
1302 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff)
1303 {
1304         struct whiteheat_set_rdb dtr_command;
1305
1306         dtr_command.port = port->number - port->serial->minor + 1;
1307         dtr_command.state = onoff;
1308         return firm_send_command(port, WHITEHEAT_SET_DTR,
1309                         (__u8 *)&dtr_command, sizeof(dtr_command));
1310 }
1311
1312
1313 static int firm_set_break(struct usb_serial_port *port, __u8 onoff)
1314 {
1315         struct whiteheat_set_rdb break_command;
1316
1317         break_command.port = port->number - port->serial->minor + 1;
1318         break_command.state = onoff;
1319         return firm_send_command(port, WHITEHEAT_SET_BREAK,
1320                         (__u8 *)&break_command, sizeof(break_command));
1321 }
1322
1323
1324 static int firm_purge(struct usb_serial_port *port, __u8 rxtx)
1325 {
1326         struct whiteheat_purge purge_command;
1327
1328         purge_command.port = port->number - port->serial->minor + 1;
1329         purge_command.what = rxtx;
1330         return firm_send_command(port, WHITEHEAT_PURGE,
1331                         (__u8 *)&purge_command, sizeof(purge_command));
1332 }
1333
1334
1335 static int firm_get_dtr_rts(struct usb_serial_port *port)
1336 {
1337         struct whiteheat_simple get_dr_command;
1338
1339         get_dr_command.port = port->number - port->serial->minor + 1;
1340         return firm_send_command(port, WHITEHEAT_GET_DTR_RTS,
1341                         (__u8 *)&get_dr_command, sizeof(get_dr_command));
1342 }
1343
1344
1345 static int firm_report_tx_done(struct usb_serial_port *port)
1346 {
1347         struct whiteheat_simple close_command;
1348
1349         close_command.port = port->number - port->serial->minor + 1;
1350         return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE,
1351                         (__u8 *)&close_command, sizeof(close_command));
1352 }
1353
1354
1355 /*****************************************************************************
1356  * Connect Tech's White Heat utility functions
1357  *****************************************************************************/
1358 static int start_command_port(struct usb_serial *serial)
1359 {
1360         struct usb_serial_port *command_port;
1361         struct whiteheat_command_private *command_info;
1362         int retval = 0;
1363
1364         command_port = serial->port[COMMAND_PORT];
1365         command_info = usb_get_serial_port_data(command_port);
1366         mutex_lock(&command_info->mutex);
1367         if (!command_info->port_running) {
1368                 /* Work around HCD bugs */
1369                 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
1370
1371                 command_port->read_urb->dev = serial->dev;
1372                 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
1373                 if (retval) {
1374                         dev_err(&serial->dev->dev,
1375                                 "%s - failed submitting read urb, error %d\n",
1376                                 __func__, retval);
1377                         goto exit;
1378                 }
1379         }
1380         command_info->port_running++;
1381
1382 exit:
1383         mutex_unlock(&command_info->mutex);
1384         return retval;
1385 }
1386
1387
1388 static void stop_command_port(struct usb_serial *serial)
1389 {
1390         struct usb_serial_port *command_port;
1391         struct whiteheat_command_private *command_info;
1392
1393         command_port = serial->port[COMMAND_PORT];
1394         command_info = usb_get_serial_port_data(command_port);
1395         mutex_lock(&command_info->mutex);
1396         command_info->port_running--;
1397         if (!command_info->port_running)
1398                 usb_kill_urb(command_port->read_urb);
1399         mutex_unlock(&command_info->mutex);
1400 }
1401
1402
1403 static int start_port_read(struct usb_serial_port *port)
1404 {
1405         struct whiteheat_private *info = usb_get_serial_port_data(port);
1406         struct whiteheat_urb_wrap *wrap;
1407         struct urb *urb;
1408         int retval = 0;
1409         unsigned long flags;
1410         struct list_head *tmp;
1411         struct list_head *tmp2;
1412
1413         spin_lock_irqsave(&info->lock, flags);
1414
1415         list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
1416                 list_del(tmp);
1417                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1418                 urb = wrap->urb;
1419                 urb->dev = port->serial->dev;
1420                 spin_unlock_irqrestore(&info->lock, flags);
1421                 retval = usb_submit_urb(urb, GFP_KERNEL);
1422                 if (retval) {
1423                         spin_lock_irqsave(&info->lock, flags);
1424                         list_add(tmp, &info->rx_urbs_free);
1425                         list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
1426                                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1427                                 urb = wrap->urb;
1428                                 list_del(tmp);
1429                                 spin_unlock_irqrestore(&info->lock, flags);
1430                                 usb_kill_urb(urb);
1431                                 spin_lock_irqsave(&info->lock, flags);
1432                                 list_add(tmp, &info->rx_urbs_free);
1433                         }
1434                         break;
1435                 }
1436                 spin_lock_irqsave(&info->lock, flags);
1437                 list_add(tmp, &info->rx_urbs_submitted);
1438         }
1439
1440         spin_unlock_irqrestore(&info->lock, flags);
1441
1442         return retval;
1443 }
1444
1445
1446 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb,
1447                                                 struct list_head *head)
1448 {
1449         struct whiteheat_urb_wrap *wrap;
1450         struct list_head *tmp;
1451
1452         list_for_each(tmp, head) {
1453                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1454                 if (wrap->urb == urb)
1455                         return wrap;
1456         }
1457
1458         return NULL;
1459 }
1460
1461
1462 static struct list_head *list_first(struct list_head *head)
1463 {
1464         return head->next;
1465 }
1466
1467
1468 static void rx_data_softint(struct work_struct *work)
1469 {
1470         struct whiteheat_private *info =
1471                 container_of(work, struct whiteheat_private, rx_work);
1472         struct usb_serial_port *port = info->port;
1473         struct tty_struct *tty = tty_port_tty_get(&port->port);
1474         struct whiteheat_urb_wrap *wrap;
1475         struct urb *urb;
1476         unsigned long flags;
1477         struct list_head *tmp;
1478         struct list_head *tmp2;
1479         int result;
1480         int sent = 0;
1481
1482         spin_lock_irqsave(&info->lock, flags);
1483         if (info->flags & THROTTLED) {
1484                 spin_unlock_irqrestore(&info->lock, flags);
1485                 goto out;
1486         }
1487
1488         list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
1489                 list_del(tmp);
1490                 spin_unlock_irqrestore(&info->lock, flags);
1491
1492                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1493                 urb = wrap->urb;
1494
1495                 if (tty && urb->actual_length) {
1496                         int len = tty_buffer_request_room(tty,
1497                                                         urb->actual_length);
1498                         /* This stuff can go away now I suspect */
1499                         if (unlikely(len < urb->actual_length)) {
1500                                 spin_lock_irqsave(&info->lock, flags);
1501                                 list_add(tmp, &info->rx_urb_q);
1502                                 spin_unlock_irqrestore(&info->lock, flags);
1503                                 tty_flip_buffer_push(tty);
1504                                 schedule_work(&info->rx_work);
1505                                 goto out;
1506                         }
1507                         tty_insert_flip_string(tty, urb->transfer_buffer, len);
1508                         sent += len;
1509                 }
1510
1511                 urb->dev = port->serial->dev;
1512                 result = usb_submit_urb(urb, GFP_ATOMIC);
1513                 if (result) {
1514                         dev_err(&port->dev,
1515                                 "%s - failed resubmitting read urb, error %d\n",
1516                                 __func__, result);
1517                         spin_lock_irqsave(&info->lock, flags);
1518                         list_add(tmp, &info->rx_urbs_free);
1519                         continue;
1520                 }
1521
1522                 spin_lock_irqsave(&info->lock, flags);
1523                 list_add(tmp, &info->rx_urbs_submitted);
1524         }
1525         spin_unlock_irqrestore(&info->lock, flags);
1526
1527         if (sent)
1528                 tty_flip_buffer_push(tty);
1529 out:
1530         tty_kref_put(tty);
1531 }
1532
1533
1534 /*****************************************************************************
1535  * Connect Tech's White Heat module functions
1536  *****************************************************************************/
1537 static int __init whiteheat_init(void)
1538 {
1539         int retval;
1540         retval = usb_serial_register(&whiteheat_fake_device);
1541         if (retval)
1542                 goto failed_fake_register;
1543         retval = usb_serial_register(&whiteheat_device);
1544         if (retval)
1545                 goto failed_device_register;
1546         retval = usb_register(&whiteheat_driver);
1547         if (retval)
1548                 goto failed_usb_register;
1549         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1550                DRIVER_DESC "\n");
1551         return 0;
1552 failed_usb_register:
1553         usb_serial_deregister(&whiteheat_device);
1554 failed_device_register:
1555         usb_serial_deregister(&whiteheat_fake_device);
1556 failed_fake_register:
1557         return retval;
1558 }
1559
1560
1561 static void __exit whiteheat_exit(void)
1562 {
1563         usb_deregister(&whiteheat_driver);
1564         usb_serial_deregister(&whiteheat_fake_device);
1565         usb_serial_deregister(&whiteheat_device);
1566 }
1567
1568
1569 module_init(whiteheat_init);
1570 module_exit(whiteheat_exit);
1571
1572 MODULE_AUTHOR(DRIVER_AUTHOR);
1573 MODULE_DESCRIPTION(DRIVER_DESC);
1574 MODULE_LICENSE("GPL");
1575
1576 MODULE_FIRMWARE("whiteheat.fw");
1577 MODULE_FIRMWARE("whiteheat_loader.fw");
1578
1579 module_param(urb_pool_size, int, 0);
1580 MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering");
1581
1582 module_param(debug, bool, S_IRUGO | S_IWUSR);
1583 MODULE_PARM_DESC(debug, "Debug enabled or not");