git.oblomov.eu Git - linux-2.6/blob - 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 driver
  16  *
  17  * (10/09/2002) Stuart MacDonald (stuartm@connecttech.com)
  18  *      Upgrade to full working driver
  19  *
  20  * (05/30/2001) gkh
  21  *      switched from using spinlock to a semaphore, which fixes lots of problems.
  22  *
  23  * (04/08/2001) gb
  24  *      Identify version on module load.
  25  *
  26  * 2001_Mar_19 gkh
  27  *      Fixed MOD_INC and MOD_DEC logic, the ability to open a port more
  28  *      than once, and the got the proper usb_device_id table entries so
  29  *      the driver works again.
  30  *
  31  * (11/01/2000) Adam J. Richter
  32  *      usb_device_id table support
  33  *
  34  * (10/05/2000) gkh
  35  *      Fixed bug with urb->dev not being set properly, now that the usb
  36  *      core needs it.
  37  *
  38  * (10/03/2000) smd
  39  *      firmware is improved to guard against crap sent to device
  40  *      firmware now replies CMD_FAILURE on bad things
  41  *      read_callback fix you provided for private info struct
  42  *      command_finished now indicates success or fail
  43  *      setup_port struct now packed to avoid gcc padding
  44  *      firmware uses 1 based port numbering, driver now handles that
  45  *
  46  * (09/11/2000) gkh
  47  *      Removed DEBUG #ifdefs with call to usb_serial_debug_data
  48  *
  49  * (07/19/2000) gkh
  50  *      Added module_init and module_exit functions to handle the fact that this
  51  *      driver is a loadable module now.
  52  *      Fixed bug with port->minor that was found by Al Borchers
  53  *
  54  * (07/04/2000) gkh
  55  *      Added support for port settings. Baud rate can now be changed. Line signals
  56  *      are not transferred to and from the tty layer yet, but things seem to be
  57  *      working well now.
  58  *
  59  * (05/04/2000) gkh
  60  *      First cut at open and close commands. Data can flow through the ports at
  61  *      default speeds now.
  62  *
  63  * (03/26/2000) gkh
  64  *      Split driver up into device specific pieces.
  65  *
  66  */
  67
  68 #include <linux/kernel.h>
  69 #include <linux/errno.h>
  70 #include <linux/init.h>
  71 #include <linux/slab.h>
  72 #include <linux/tty.h>
  73 #include <linux/tty_driver.h>
  74 #include <linux/tty_flip.h>
  75 #include <linux/module.h>
  76 #include <linux/spinlock.h>
  77 #include <linux/mutex.h>
  78 #include <asm/uaccess.h>
  79 #include <asm/termbits.h>
  80 #include <linux/usb.h>
  81 #include <linux/serial_reg.h>
  82 #include <linux/serial.h>
  83 #include <linux/usb/serial.h>
  84 #include <linux/firmware.h>
  85 #include <linux/ihex.h>
  86 #include "whiteheat.h"                  /* WhiteHEAT specific commands */
  87
  88 static int debug;
  89
  90 #ifndef CMSPAR
  91 #define CMSPAR 0
  92 #endif
  93
  94 /*
  95  * Version Information
  96  */
  97 #define DRIVER_VERSION "v2.0"
  98 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>"
  99 #define DRIVER_DESC "USB ConnectTech WhiteHEAT driver"
 100
 101 #define CONNECT_TECH_VENDOR_ID          0x0710
 102 #define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001
 103 #define CONNECT_TECH_WHITE_HEAT_ID      0x8001
 104
 105 /*
 106    ID tables for whiteheat are unusual, because we want to different
 107    things for different versions of the device.  Eventually, this
 108    will be doable from a single table.  But, for now, we define two
 109    separate ID tables, and then a third table that combines them
 110    just for the purpose of exporting the autoloading information.
 111 */
 112 static struct usb_device_id id_table_std [] = {
 113         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
 114         { }                                             /* Terminating entry */
 115 };
 116
 117 static struct usb_device_id id_table_prerenumeration [] = {
 118         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
 119         { }                                             /* Terminating entry */
 120 };
 121
 122 static struct usb_device_id id_table_combined [] = {
 123         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
 124         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
 125         { }                                             /* Terminating entry */
 126 };
 127
 128 MODULE_DEVICE_TABLE (usb, id_table_combined);
 129
 130 static struct usb_driver whiteheat_driver = {
 131         .name =         "whiteheat",
 132         .probe =        usb_serial_probe,
 133         .disconnect =   usb_serial_disconnect,
 134         .id_table =     id_table_combined,
 135         .no_dynamic_id =        1,
 136 };
 137
 138 /* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */
 139 static int  whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id);
 140 static int  whiteheat_firmware_attach   (struct usb_serial *serial);
 141
 142 /* function prototypes for the Connect Tech WhiteHEAT serial converter */
 143 static int  whiteheat_attach            (struct usb_serial *serial);
 144 static void whiteheat_shutdown          (struct usb_serial *serial);
 145 static int  whiteheat_open              (struct usb_serial_port *port, struct file *filp);
 146 static void whiteheat_close             (struct usb_serial_port *port, struct file *filp);
 147 static int  whiteheat_write             (struct usb_serial_port *port, const unsigned char *buf, int count);
 148 static int  whiteheat_write_room        (struct usb_serial_port *port);
 149 static int  whiteheat_ioctl             (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
 150 static void whiteheat_set_termios       (struct usb_serial_port *port, struct ktermios * old);
 151 static int  whiteheat_tiocmget          (struct usb_serial_port *port, struct file *file);
 152 static int  whiteheat_tiocmset          (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
 153 static void whiteheat_break_ctl         (struct usb_serial_port *port, int break_state);
 154 static int  whiteheat_chars_in_buffer   (struct usb_serial_port *port);
 155 static void whiteheat_throttle          (struct usb_serial_port *port);
 156 static void whiteheat_unthrottle        (struct usb_serial_port *port);
 157 static void whiteheat_read_callback     (struct urb *urb);
 158 static void whiteheat_write_callback    (struct urb *urb);
 159
 160 static struct usb_serial_driver whiteheat_fake_device = {
 161         .driver = {
 162                 .owner =        THIS_MODULE,
 163                 .name =         "whiteheatnofirm",
 164         },
 165         .description =          "Connect Tech - WhiteHEAT - (prerenumeration)",
 166         .usb_driver =           &whiteheat_driver,
 167         .id_table =             id_table_prerenumeration,
 168         .num_ports =            1,
 169         .probe =                whiteheat_firmware_download,
 170         .attach =               whiteheat_firmware_attach,
 171 };
 172
 173 static struct usb_serial_driver whiteheat_device = {
 174         .driver = {
 175                 .owner =        THIS_MODULE,
 176                 .name =         "whiteheat",
 177         },
 178         .description =          "Connect Tech - WhiteHEAT",
 179         .usb_driver =           &whiteheat_driver,
 180         .id_table =             id_table_std,
 181         .num_ports =            4,
 182         .attach =               whiteheat_attach,
 183         .shutdown =             whiteheat_shutdown,
 184         .open =                 whiteheat_open,
 185         .close =                whiteheat_close,
 186         .write =                whiteheat_write,
 187         .write_room =           whiteheat_write_room,
 188         .ioctl =                whiteheat_ioctl,
 189         .set_termios =          whiteheat_set_termios,
 190         .break_ctl =            whiteheat_break_ctl,
 191         .tiocmget =             whiteheat_tiocmget,
 192         .tiocmset =             whiteheat_tiocmset,
 193         .chars_in_buffer =      whiteheat_chars_in_buffer,
 194         .throttle =             whiteheat_throttle,
 195         .unthrottle =           whiteheat_unthrottle,
 196         .read_bulk_callback =   whiteheat_read_callback,
 197         .write_bulk_callback =  whiteheat_write_callback,
 198 };
 199
 200
 201 struct whiteheat_command_private {
 202         struct mutex            mutex;
 203         __u8                    port_running;
 204         __u8                    command_finished;
 205         wait_queue_head_t       wait_command;   /* for handling sleeping while waiting for a command to finish */
 206         __u8                    result_buffer[64];
 207 };
 208
 209
 210 #define THROTTLED               0x01
 211 #define ACTUALLY_THROTTLED      0x02
 212
 213 static int urb_pool_size = 8;
 214
 215 struct whiteheat_urb_wrap {
 216         struct list_head        list;
 217         struct urb              *urb;
 218 };
 219
 220 struct whiteheat_private {
 221         spinlock_t              lock;
 222         __u8                    flags;
 223         __u8                    mcr;            /* FIXME: no locking on mcr */
 224         struct list_head        rx_urbs_free;
 225         struct list_head        rx_urbs_submitted;
 226         struct list_head        rx_urb_q;
 227         struct work_struct      rx_work;
 228         struct usb_serial_port  *port;
 229         struct list_head        tx_urbs_free;
 230         struct list_head        tx_urbs_submitted;
 231         struct mutex            deathwarrant;
 232 };
 233
 234
 235 /* local function prototypes */
 236 static int start_command_port(struct usb_serial *serial);
 237 static void stop_command_port(struct usb_serial *serial);
 238 static void command_port_write_callback(struct urb *urb);
 239 static void command_port_read_callback(struct urb *urb);
 240
 241 static int start_port_read(struct usb_serial_port *port);
 242 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, struct list_head *head);
 243 static struct list_head *list_first(struct list_head *head);
 244 static void rx_data_softint(struct work_struct *work);
 245
 246 static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize);
 247 static int firm_open(struct usb_serial_port *port);
 248 static int firm_close(struct usb_serial_port *port);
 249 static int firm_setup_port(struct usb_serial_port *port);
 250 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
 251 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
 252 static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
 253 static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
 254 static int firm_get_dtr_rts(struct usb_serial_port *port);
 255 static int firm_report_tx_done(struct usb_serial_port *port);
 256
 257
 258 #define COMMAND_PORT            4
 259 #define COMMAND_TIMEOUT         (2*HZ)  /* 2 second timeout for a command */
 260 #define COMMAND_TIMEOUT_MS      2000
 261 #define CLOSING_DELAY           (30 * HZ)
 262
 263
 264 /*****************************************************************************
 265  * Connect Tech's White Heat prerenumeration driver functions
 266  *****************************************************************************/
 267
 268 /* steps to download the firmware to the WhiteHEAT device:
 269  - hold the reset (by writing to the reset bit of the CPUCS register)
 270  - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
 271  - release the reset (by writing to the CPUCS register)
 272  - download the WH.HEX file for all addresses greater than 0x1b3f using
 273    VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
 274  - hold the reset
 275  - download the WH.HEX file for all addresses less than 0x1b40 using
 276    VENDOR_REQUEST_ANCHOR_LOAD
 277  - release the reset
 278  - device renumerated itself and comes up as new device id with all
 279    firmware download completed.
 280 */
 281 static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id)
 282 {
 283         int response, ret = -ENOENT;
 284         const struct firmware *loader_fw = NULL, *firmware_fw = NULL;
 285         const struct ihex_binrec *record;
 286
 287         dbg("%s", __func__);
 288
 289         if (request_ihex_firmware(&firmware_fw, "whiteheat.fw",
 290                                   &serial->dev->dev)) {
 291                 err("%s - request \"whiteheat.fw\" failed", __func__);
 292                 goto out;
 293         }
 294         if (request_ihex_firmware(&loader_fw, "whiteheat_loader.fw",
 295                              &serial->dev->dev)) {
 296                 err("%s - request \"whiteheat_loader.fw\" failed", __func__);
 297                 goto out;
 298         }
 299         ret = 0;
 300         response = ezusb_set_reset (serial, 1);
 301
 302         record = (const struct ihex_binrec *)loader_fw->data;
 303         while (record) {
 304                 response = ezusb_writememory (serial, be32_to_cpu(record->addr),
 305                                               (unsigned char *)record->data,
 306                                               be16_to_cpu(record->len), 0xa0);
 307                 if (response < 0) {
 308                         err("%s - ezusb_writememory failed for loader (%d %04X %p %d)",
 309                             __func__, response, be32_to_cpu(record->addr),
 310                             record->data, be16_to_cpu(record->len));
 311                         break;
 312                 }
 313                 record = ihex_next_binrec(record);
 314         }
 315
 316         response = ezusb_set_reset (serial, 0);
 317
 318         record = (const struct ihex_binrec *)firmware_fw->data;
 319         while (record && be32_to_cpu(record->addr) < 0x1b40)
 320                 record = ihex_next_binrec(record);
 321         while (record) {
 322                 response = ezusb_writememory (serial, be32_to_cpu(record->addr),
 323                                               (unsigned char *)record->data,
 324                                               be16_to_cpu(record->len), 0xa3);
 325                 if (response < 0) {
 326                         err("%s - ezusb_writememory failed for first firmware step (%d %04X %p %d)",
 327                             __func__, response, be32_to_cpu(record->addr),
 328                             record->data, be16_to_cpu(record->len));
 329                         break;
 330                 }
 331                 ++record;
 332         }
 333
 334         response = ezusb_set_reset (serial, 1);
 335
 336         record = (const struct ihex_binrec *)firmware_fw->data;
 337         while (record && be32_to_cpu(record->addr) < 0x1b40) {
 338                 response = ezusb_writememory (serial, be32_to_cpu(record->addr),
 339                                               (unsigned char *)record->data,
 340                                               be16_to_cpu(record->len), 0xa0);
 341                 if (response < 0) {
 342                         err("%s - ezusb_writememory failed for second firmware step (%d %04X %p %d)",
 343                             __func__, response, be32_to_cpu(record->addr),
 344                             record->data, be16_to_cpu(record->len));
 345                         break;
 346                 }
 347                 ++record;
 348         }
 349         ret = 0;
 350         response = ezusb_set_reset (serial, 0);
 351  out:
 352         release_firmware(loader_fw);
 353         release_firmware(firmware_fw);
 354         return ret;
 355 }
 356
 357
 358 static int whiteheat_firmware_attach (struct usb_serial *serial)
 359 {
 360         /* We want this device to fail to have a driver assigned to it */
 361         return 1;
 362 }
 363
 364
 365 /*****************************************************************************
 366  * Connect Tech's White Heat serial driver functions
 367  *****************************************************************************/
 368 static int whiteheat_attach (struct usb_serial *serial)
 369 {
 370         struct usb_serial_port *command_port;
 371         struct whiteheat_command_private *command_info;
 372         struct usb_serial_port *port;
 373         struct whiteheat_private *info;
 374         struct whiteheat_hw_info *hw_info;
 375         int pipe;
 376         int ret;
 377         int alen;
 378         __u8 *command;
 379         __u8 *result;
 380         int i;
 381         int j;
 382         struct urb *urb;
 383         int buf_size;
 384         struct whiteheat_urb_wrap *wrap;
 385         struct list_head *tmp;
 386
 387         command_port = serial->port[COMMAND_PORT];
 388
 389         pipe = usb_sndbulkpipe (serial->dev, command_port->bulk_out_endpointAddress);
 390         command = kmalloc(2, GFP_KERNEL);
 391         if (!command)
 392                 goto no_command_buffer;
 393         command[0] = WHITEHEAT_GET_HW_INFO;
 394         command[1] = 0;
 395
 396         result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
 397         if (!result)
 398                 goto no_result_buffer;
 399         /*
 400          * When the module is reloaded the firmware is still there and
 401          * the endpoints are still in the usb core unchanged. This is the
 402          * unlinking bug in disguise. Same for the call below.
 403          */
 404         usb_clear_halt(serial->dev, pipe);
 405         ret = usb_bulk_msg (serial->dev, pipe, command, 2, &alen, COMMAND_TIMEOUT_MS);
 406         if (ret) {
 407                 err("%s: Couldn't send command [%d]", serial->type->description, ret);
 408                 goto no_firmware;
 409         } else if (alen != 2) {
 410                 err("%s: Send command incomplete [%d]", serial->type->description, alen);
 411                 goto no_firmware;
 412         }
 413
 414         pipe = usb_rcvbulkpipe (serial->dev, command_port->bulk_in_endpointAddress);
 415         /* See the comment on the usb_clear_halt() above */
 416         usb_clear_halt(serial->dev, pipe);
 417         ret = usb_bulk_msg (serial->dev, pipe, result, sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
 418         if (ret) {
 419                 err("%s: Couldn't get results [%d]", serial->type->description, ret);
 420                 goto no_firmware;
 421         } else if (alen != sizeof(*hw_info) + 1) {
 422                 err("%s: Get results incomplete [%d]", serial->type->description, alen);
 423                 goto no_firmware;
 424         } else if (result[0] != command[0]) {
 425                 err("%s: Command failed [%d]", serial->type->description, result[0]);
 426                 goto no_firmware;
 427         }
 428
 429         hw_info = (struct whiteheat_hw_info *)&result[1];
 430
 431         info("%s: Driver %s: Firmware v%d.%02d", serial->type->description,
 432              DRIVER_VERSION, hw_info->sw_major_rev, hw_info->sw_minor_rev);
 433
 434         for (i = 0; i < serial->num_ports; i++) {
 435                 port = serial->port[i];
 436
 437                 info = kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL);
 438                 if (info == NULL) {
 439                         err("%s: Out of memory for port structures\n", serial->type->description);
 440                         goto no_private;
 441                 }
 442
 443                 spin_lock_init(&info->lock);
 444                 mutex_init(&info->deathwarrant);
 445                 info->flags = 0;
 446                 info->mcr = 0;
 447                 INIT_WORK(&info->rx_work, rx_data_softint);
 448                 info->port = port;
 449
 450                 INIT_LIST_HEAD(&info->rx_urbs_free);
 451                 INIT_LIST_HEAD(&info->rx_urbs_submitted);
 452                 INIT_LIST_HEAD(&info->rx_urb_q);
 453                 INIT_LIST_HEAD(&info->tx_urbs_free);
 454                 INIT_LIST_HEAD(&info->tx_urbs_submitted);
 455
 456                 for (j = 0; j < urb_pool_size; j++) {
 457                         urb = usb_alloc_urb(0, GFP_KERNEL);
 458                         if (!urb) {
 459                                 err("No free urbs available");
 460                                 goto no_rx_urb;
 461                         }
 462                         buf_size = port->read_urb->transfer_buffer_length;
 463                         urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
 464                         if (!urb->transfer_buffer) {
 465                                 err("Couldn't allocate urb buffer");
 466                                 goto no_rx_buf;
 467                         }
 468                         wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
 469                         if (!wrap) {
 470                                 err("Couldn't allocate urb wrapper");
 471                                 goto no_rx_wrap;
 472                         }
 473                         usb_fill_bulk_urb(urb, serial->dev,
 474                                         usb_rcvbulkpipe(serial->dev,
 475                                                 port->bulk_in_endpointAddress),
 476                                         urb->transfer_buffer, buf_size,
 477                                         whiteheat_read_callback, port);
 478                         wrap->urb = urb;
 479                         list_add(&wrap->list, &info->rx_urbs_free);
 480
 481                         urb = usb_alloc_urb(0, GFP_KERNEL);
 482                         if (!urb) {
 483                                 err("No free urbs available");
 484                                 goto no_tx_urb;
 485                         }
 486                         buf_size = port->write_urb->transfer_buffer_length;
 487                         urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
 488                         if (!urb->transfer_buffer) {
 489                                 err("Couldn't allocate urb buffer");
 490                                 goto no_tx_buf;
 491                         }
 492                         wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
 493                         if (!wrap) {
 494                                 err("Couldn't allocate urb wrapper");
 495                                 goto no_tx_wrap;
 496                         }
 497                         usb_fill_bulk_urb(urb, serial->dev,
 498                                         usb_sndbulkpipe(serial->dev,
 499                                                 port->bulk_out_endpointAddress),
 500                                         urb->transfer_buffer, buf_size,
 501                                         whiteheat_write_callback, port);
 502                         wrap->urb = urb;
 503                         list_add(&wrap->list, &info->tx_urbs_free);
 504                 }
 505
 506                 usb_set_serial_port_data(port, info);
 507         }
 508
 509         command_info = kmalloc(sizeof(struct whiteheat_command_private), GFP_KERNEL);
 510         if (command_info == NULL) {
 511                 err("%s: Out of memory for port structures\n", serial->type->description);
 512                 goto no_command_private;
 513         }
 514
 515         mutex_init(&command_info->mutex);
 516         command_info->port_running = 0;
 517         init_waitqueue_head(&command_info->wait_command);
 518         usb_set_serial_port_data(command_port, command_info);
 519         command_port->write_urb->complete = command_port_write_callback;
 520         command_port->read_urb->complete = command_port_read_callback;
 521         kfree(result);
 522         kfree(command);
 523
 524         return 0;
 525
 526 no_firmware:
 527         /* Firmware likely not running */
 528         err("%s: Unable to retrieve firmware version, try replugging\n", serial->type->description);
 529         err("%s: If the firmware is not running (status led not blinking)\n", serial->type->description);
 530         err("%s: please contact support@connecttech.com\n", serial->type->description);
 531         kfree(result);
 532         return -ENODEV;
 533
 534 no_command_private:
 535         for (i = serial->num_ports - 1; i >= 0; i--) {
 536                 port = serial->port[i];
 537                 info = usb_get_serial_port_data(port);
 538                 for (j = urb_pool_size - 1; j >= 0; j--) {
 539                         tmp = list_first(&info->tx_urbs_free);
 540                         list_del(tmp);
 541                         wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
 542                         urb = wrap->urb;
 543                         kfree(wrap);
 544 no_tx_wrap:
 545                         kfree(urb->transfer_buffer);
 546 no_tx_buf:
 547                         usb_free_urb(urb);
 548 no_tx_urb:
 549                         tmp = list_first(&info->rx_urbs_free);
 550                         list_del(tmp);
 551                         wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
 552                         urb = wrap->urb;
 553                         kfree(wrap);
 554 no_rx_wrap:
 555                         kfree(urb->transfer_buffer);
 556 no_rx_buf:
 557                         usb_free_urb(urb);
 558 no_rx_urb:
 559                         ;
 560                 }
 561                 kfree(info);
 562 no_private:
 563                 ;
 564         }
 565         kfree(result);
 566 no_result_buffer:
 567         kfree(command);
 568 no_command_buffer:
 569         return -ENOMEM;
 570 }
 571
 572
 573 static void whiteheat_shutdown (struct usb_serial *serial)
 574 {
 575         struct usb_serial_port *command_port;
 576         struct usb_serial_port *port;
 577         struct whiteheat_private *info;
 578         struct whiteheat_urb_wrap *wrap;
 579         struct urb *urb;
 580         struct list_head *tmp;
 581         struct list_head *tmp2;
 582         int i;
 583
 584         dbg("%s", __func__);
 585
 586         /* free up our private data for our command port */
 587         command_port = serial->port[COMMAND_PORT];
 588         kfree (usb_get_serial_port_data(command_port));
 589
 590         for (i = 0; i < serial->num_ports; i++) {
 591                 port = serial->port[i];
 592                 info = usb_get_serial_port_data(port);
 593                 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
 594                         list_del(tmp);
 595                         wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
 596                         urb = wrap->urb;
 597                         kfree(wrap);
 598                         kfree(urb->transfer_buffer);
 599                         usb_free_urb(urb);
 600                 }
 601                 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) {
 602                         list_del(tmp);
 603                         wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
 604                         urb = wrap->urb;
 605                         kfree(wrap);
 606                         kfree(urb->transfer_buffer);
 607                         usb_free_urb(urb);
 608                 }
 609                 kfree(info);
 610         }
 611
 612         return;
 613 }
 614
 615
 616 static int whiteheat_open (struct usb_serial_port *port, struct file *filp)
 617 {
 618         int             retval = 0;
 619         struct ktermios old_term;
 620
 621         dbg("%s - port %d", __func__, port->number);
 622
 623         retval = start_command_port(port->serial);
 624         if (retval)
 625                 goto exit;
 626
 627         port->tty->low_latency = 1;
 628
 629         /* send an open port command */
 630         retval = firm_open(port);
 631         if (retval) {
 632                 stop_command_port(port->serial);
 633                 goto exit;
 634         }
 635
 636         retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX);
 637         if (retval) {
 638                 firm_close(port);
 639                 stop_command_port(port->serial);
 640                 goto exit;
 641         }
 642
 643         old_term.c_cflag = ~port->tty->termios->c_cflag;
 644         old_term.c_iflag = ~port->tty->termios->c_iflag;
 645         whiteheat_set_termios(port, &old_term);
 646
 647         /* Work around HCD bugs */
 648         usb_clear_halt(port->serial->dev, port->read_urb->pipe);
 649         usb_clear_halt(port->serial->dev, port->write_urb->pipe);
 650
 651         /* Start reading from the device */
 652         retval = start_port_read(port);
 653         if (retval) {
 654                 err("%s - failed submitting read urb, error %d", __func__, retval);
 655                 firm_close(port);
 656                 stop_command_port(port->serial);
 657                 goto exit;
 658         }
 659
 660 exit:
 661         dbg("%s - exit, retval = %d", __func__, retval);
 662         return retval;
 663 }
 664
 665
 666 static void whiteheat_close(struct usb_serial_port *port, struct file * filp)
 667 {
 668         struct whiteheat_private *info = usb_get_serial_port_data(port);
 669         struct whiteheat_urb_wrap *wrap;
 670         struct urb *urb;
 671         struct list_head *tmp;
 672         struct list_head *tmp2;
 673
 674         dbg("%s - port %d", __func__, port->number);
 675
 676         mutex_lock(&port->serial->disc_mutex);
 677         /* filp is NULL when called from usb_serial_disconnect */
 678         if ((filp && (tty_hung_up_p(filp))) || port->serial->disconnected) {
 679                 mutex_unlock(&port->serial->disc_mutex);
 680                 return;
 681         }
 682         mutex_unlock(&port->serial->disc_mutex);
 683
 684         port->tty->closing = 1;
 685
 686 /*
 687  * Not currently in use; tty_wait_until_sent() calls
 688  * serial_chars_in_buffer() which deadlocks on the second semaphore
 689  * acquisition. This should be fixed at some point. Greg's been
 690  * notified.
 691         if ((filp->f_flags & (O_NDELAY | O_NONBLOCK)) == 0) {
 692                 tty_wait_until_sent(port->tty, CLOSING_DELAY);
 693         }
 694 */
 695
 696         tty_driver_flush_buffer(port->tty);
 697         tty_ldisc_flush(port->tty);
 698
 699         firm_report_tx_done(port);
 700
 701         firm_close(port);
 702
 703         /* shutdown our bulk reads and writes */
 704         mutex_lock(&info->deathwarrant);
 705         spin_lock_irq(&info->lock);
 706         list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
 707                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
 708                 urb = wrap->urb;
 709                 list_del(tmp);
 710                 spin_unlock_irq(&info->lock);
 711                 usb_kill_urb(urb);
 712                 spin_lock_irq(&info->lock);
 713                 list_add(tmp, &info->rx_urbs_free);
 714         }
 715         list_for_each_safe(tmp, tmp2, &info->rx_urb_q)
 716                 list_move(tmp, &info->rx_urbs_free);
 717         list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) {
 718                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
 719                 urb = wrap->urb;
 720                 list_del(tmp);
 721                 spin_unlock_irq(&info->lock);
 722                 usb_kill_urb(urb);
 723                 spin_lock_irq(&info->lock);
 724                 list_add(tmp, &info->tx_urbs_free);
 725         }
 726         spin_unlock_irq(&info->lock);
 727         mutex_unlock(&info->deathwarrant);
 728
 729         stop_command_port(port->serial);
 730
 731         port->tty->closing = 0;
 732 }
 733
 734
 735 static int whiteheat_write(struct usb_serial_port *port, const unsigned char *buf, int count)
 736 {
 737         struct usb_serial *serial = port->serial;
 738         struct whiteheat_private *info = usb_get_serial_port_data(port);
 739         struct whiteheat_urb_wrap *wrap;
 740         struct urb *urb;
 741         int result;
 742         int bytes;
 743         int sent = 0;
 744         unsigned long flags;
 745         struct list_head *tmp;
 746
 747         dbg("%s - port %d", __func__, port->number);
 748
 749         if (count == 0) {
 750                 dbg("%s - write request of 0 bytes", __func__);
 751                 return (0);
 752         }
 753
 754         while (count) {
 755                 spin_lock_irqsave(&info->lock, flags);
 756                 if (list_empty(&info->tx_urbs_free)) {
 757                         spin_unlock_irqrestore(&info->lock, flags);
 758                         break;
 759                 }
 760                 tmp = list_first(&info->tx_urbs_free);
 761                 list_del(tmp);
 762                 spin_unlock_irqrestore(&info->lock, flags);
 763
 764                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
 765                 urb = wrap->urb;
 766                 bytes = (count > port->bulk_out_size) ? port->bulk_out_size : count;
 767                 memcpy (urb->transfer_buffer, buf + sent, bytes);
 768
 769                 usb_serial_debug_data(debug, &port->dev, __func__, bytes, urb->transfer_buffer);
 770
 771                 urb->dev = serial->dev;
 772                 urb->transfer_buffer_length = bytes;
 773                 result = usb_submit_urb(urb, GFP_ATOMIC);
 774                 if (result) {
 775                         err("%s - failed submitting write urb, error %d", __func__, result);
 776                         sent = result;
 777                         spin_lock_irqsave(&info->lock, flags);
 778                         list_add(tmp, &info->tx_urbs_free);
 779                         spin_unlock_irqrestore(&info->lock, flags);
 780                         break;
 781                 } else {
 782                         sent += bytes;
 783                         count -= bytes;
 784                         spin_lock_irqsave(&info->lock, flags);
 785                         list_add(tmp, &info->tx_urbs_submitted);
 786                         spin_unlock_irqrestore(&info->lock, flags);
 787                 }
 788         }
 789
 790         return sent;
 791 }
 792
 793
 794 static int whiteheat_write_room(struct usb_serial_port *port)
 795 {
 796         struct whiteheat_private *info = usb_get_serial_port_data(port);
 797         struct list_head *tmp;
 798         int room = 0;
 799         unsigned long flags;
 800
 801         dbg("%s - port %d", __func__, port->number);
 802
 803         spin_lock_irqsave(&info->lock, flags);
 804         list_for_each(tmp, &info->tx_urbs_free)
 805                 room++;
 806         spin_unlock_irqrestore(&info->lock, flags);
 807         room *= port->bulk_out_size;
 808
 809         dbg("%s - returns %d", __func__, room);
 810         return (room);
 811 }
 812
 813
 814 static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file)
 815 {
 816         struct whiteheat_private *info = usb_get_serial_port_data(port);
 817         unsigned int modem_signals = 0;
 818
 819         dbg("%s - port %d", __func__, port->number);
 820
 821         firm_get_dtr_rts(port);
 822         if (info->mcr & UART_MCR_DTR)
 823                 modem_signals |= TIOCM_DTR;
 824         if (info->mcr & UART_MCR_RTS)
 825                 modem_signals |= TIOCM_RTS;
 826
 827         return modem_signals;
 828 }
 829
 830
 831 static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file,
 832                                unsigned int set, unsigned int clear)
 833 {
 834         struct whiteheat_private *info = usb_get_serial_port_data(port);
 835
 836         dbg("%s - port %d", __func__, port->number);
 837
 838         if (set & TIOCM_RTS)
 839                 info->mcr |= UART_MCR_RTS;
 840         if (set & TIOCM_DTR)
 841                 info->mcr |= UART_MCR_DTR;
 842
 843         if (clear & TIOCM_RTS)
 844                 info->mcr &= ~UART_MCR_RTS;
 845         if (clear & TIOCM_DTR)
 846                 info->mcr &= ~UART_MCR_DTR;
 847
 848         firm_set_dtr(port, info->mcr & UART_MCR_DTR);
 849         firm_set_rts(port, info->mcr & UART_MCR_RTS);
 850         return 0;
 851 }
 852
 853
 854 static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
 855 {
 856         struct serial_struct serstruct;
 857         void __user *user_arg = (void __user *)arg;
 858
 859         dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd);
 860
 861         switch (cmd) {
 862                 case TIOCGSERIAL:
 863                         memset(&serstruct, 0, sizeof(serstruct));
 864                         serstruct.type = PORT_16654;
 865                         serstruct.line = port->serial->minor;
 866                         serstruct.port = port->number;
 867                         serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 868                         serstruct.xmit_fifo_size = port->bulk_out_size;
 869                         serstruct.custom_divisor = 0;
 870                         serstruct.baud_base = 460800;
 871                         serstruct.close_delay = CLOSING_DELAY;
 872                         serstruct.closing_wait = CLOSING_DELAY;
 873
 874                         if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
 875                                 return -EFAULT;
 876
 877                         break;
 878
 879                 case TIOCSSERIAL:
 880                         if (copy_from_user(&serstruct, user_arg, sizeof(serstruct)))
 881                                 return -EFAULT;
 882
 883                         /*
 884                          * For now this is ignored. dip sets the ASYNC_[V]HI flags
 885                          * but this isn't used by us at all. Maybe someone somewhere
 886                          * will need the custom_divisor setting.
 887                          */
 888
 889                         break;
 890
 891                 default:
 892                         break;
 893         }
 894
 895         return -ENOIOCTLCMD;
 896 }
 897
 898
 899 static void whiteheat_set_termios(struct usb_serial_port *port, struct ktermios *old_termios)
 900 {
 901         dbg("%s -port %d", __func__, port->number);
 902         firm_setup_port(port);
 903 }
 904
 905
 906 static void whiteheat_break_ctl(struct usb_serial_port *port, int break_state) {
 907         firm_set_break(port, break_state);
 908 }
 909
 910
 911 static int whiteheat_chars_in_buffer(struct usb_serial_port *port)
 912 {
 913         struct whiteheat_private *info = usb_get_serial_port_data(port);
 914         struct list_head *tmp;
 915         struct whiteheat_urb_wrap *wrap;
 916         int chars = 0;
 917         unsigned long flags;
 918
 919         dbg("%s - port %d", __func__, port->number);
 920
 921         spin_lock_irqsave(&info->lock, flags);
 922         list_for_each(tmp, &info->tx_urbs_submitted) {
 923                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
 924                 chars += wrap->urb->transfer_buffer_length;
 925         }
 926         spin_unlock_irqrestore(&info->lock, flags);
 927
 928         dbg ("%s - returns %d", __func__, chars);
 929         return chars;
 930 }
 931
 932
 933 static void whiteheat_throttle (struct usb_serial_port *port)
 934 {
 935         struct whiteheat_private *info = usb_get_serial_port_data(port);
 936         unsigned long flags;
 937
 938         dbg("%s - port %d", __func__, port->number);
 939
 940         spin_lock_irqsave(&info->lock, flags);
 941         info->flags |= THROTTLED;
 942         spin_unlock_irqrestore(&info->lock, flags);
 943
 944         return;
 945 }
 946
 947
 948 static void whiteheat_unthrottle (struct usb_serial_port *port)
 949 {
 950         struct whiteheat_private *info = usb_get_serial_port_data(port);
 951         int actually_throttled;
 952         unsigned long flags;
 953
 954         dbg("%s - port %d", __func__, port->number);
 955
 956         spin_lock_irqsave(&info->lock, flags);
 957         actually_throttled = info->flags & ACTUALLY_THROTTLED;
 958         info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
 959         spin_unlock_irqrestore(&info->lock, flags);
 960
 961         if (actually_throttled)
 962                 rx_data_softint(&info->rx_work);
 963
 964         return;
 965 }
 966
 967
 968 /*****************************************************************************
 969  * Connect Tech's White Heat callback routines
 970  *****************************************************************************/
 971 static void command_port_write_callback(struct urb *urb)
 972 {
 973         int status = urb->status;
 974
 975         dbg("%s", __func__);
 976
 977         if (status) {
 978                 dbg("nonzero urb status: %d", status);
 979                 return;
 980         }
 981 }
 982
 983
 984 static void command_port_read_callback(struct urb *urb)
 985 {
 986         struct usb_serial_port *command_port = urb->context;
 987         struct whiteheat_command_private *command_info;
 988         int status = urb->status;
 989         unsigned char *data = urb->transfer_buffer;
 990         int result;
 991
 992         dbg("%s", __func__);
 993
 994         command_info = usb_get_serial_port_data(command_port);
 995         if (!command_info) {
 996                 dbg ("%s - command_info is NULL, exiting.", __func__);
 997                 return;
 998         }
 999         if (status) {
1000                 dbg("%s - nonzero urb status: %d", __func__, status);
1001                 if (status != -ENOENT)
1002                         command_info->command_finished = WHITEHEAT_CMD_FAILURE;
1003                 wake_up(&command_info->wait_command);
1004                 return;
1005         }
1006
1007         usb_serial_debug_data(debug, &command_port->dev, __func__, urb->actual_length, data);
1008
1009         if (data[0] == WHITEHEAT_CMD_COMPLETE) {
1010                 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1011                 wake_up(&command_info->wait_command);
1012         } else if (data[0] == WHITEHEAT_CMD_FAILURE) {
1013                 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
1014                 wake_up(&command_info->wait_command);
1015         } else if (data[0] == WHITEHEAT_EVENT) {
1016                 /* These are unsolicited reports from the firmware, hence no waiting command to wakeup */
1017                 dbg("%s - event received", __func__);
1018         } else if (data[0] == WHITEHEAT_GET_DTR_RTS) {
1019                 memcpy(command_info->result_buffer, &data[1], urb->actual_length - 1);
1020                 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1021                 wake_up(&command_info->wait_command);
1022         } else {
1023                 dbg("%s - bad reply from firmware", __func__);
1024         }
1025
1026         /* Continue trying to always read */
1027         command_port->read_urb->dev = command_port->serial->dev;
1028         result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
1029         if (result)
1030                 dbg("%s - failed resubmitting read urb, error %d", __func__, result);
1031 }
1032
1033
1034 static void whiteheat_read_callback(struct urb *urb)
1035 {
1036         struct usb_serial_port *port = urb->context;
1037         struct whiteheat_urb_wrap *wrap;
1038         unsigned char *data = urb->transfer_buffer;
1039         struct whiteheat_private *info = usb_get_serial_port_data(port);
1040         int status = urb->status;
1041
1042         dbg("%s - port %d", __func__, port->number);
1043
1044         spin_lock(&info->lock);
1045         wrap = urb_to_wrap(urb, &info->rx_urbs_submitted);
1046         if (!wrap) {
1047                 spin_unlock(&info->lock);
1048                 err("%s - Not my urb!", __func__);
1049                 return;
1050         }
1051         list_del(&wrap->list);
1052         spin_unlock(&info->lock);
1053
1054         if (status) {
1055                 dbg("%s - nonzero read bulk status received: %d",
1056                     __func__, status);
1057                 spin_lock(&info->lock);
1058                 list_add(&wrap->list, &info->rx_urbs_free);
1059                 spin_unlock(&info->lock);
1060                 return;
1061         }
1062
1063         usb_serial_debug_data(debug, &port->dev, __func__, urb->actual_length, data);
1064
1065         spin_lock(&info->lock);
1066         list_add_tail(&wrap->list, &info->rx_urb_q);
1067         if (info->flags & THROTTLED) {
1068                 info->flags |= ACTUALLY_THROTTLED;
1069                 spin_unlock(&info->lock);
1070                 return;
1071         }
1072         spin_unlock(&info->lock);
1073
1074         schedule_work(&info->rx_work);
1075 }
1076
1077
1078 static void whiteheat_write_callback(struct urb *urb)
1079 {
1080         struct usb_serial_port *port = urb->context;
1081         struct whiteheat_private *info = usb_get_serial_port_data(port);
1082         struct whiteheat_urb_wrap *wrap;
1083         int status = urb->status;
1084
1085         dbg("%s - port %d", __func__, port->number);
1086
1087         spin_lock(&info->lock);
1088         wrap = urb_to_wrap(urb, &info->tx_urbs_submitted);
1089         if (!wrap) {
1090                 spin_unlock(&info->lock);
1091                 err("%s - Not my urb!", __func__);
1092                 return;
1093         }
1094         list_move(&wrap->list, &info->tx_urbs_free);
1095         spin_unlock(&info->lock);
1096
1097         if (status) {
1098                 dbg("%s - nonzero write bulk status received: %d",
1099                     __func__, status);
1100                 return;
1101         }
1102
1103         usb_serial_port_softint(port);
1104 }
1105
1106
1107 /*****************************************************************************
1108  * Connect Tech's White Heat firmware interface
1109  *****************************************************************************/
1110 static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize)
1111 {
1112         struct usb_serial_port *command_port;
1113         struct whiteheat_command_private *command_info;
1114         struct whiteheat_private *info;
1115         __u8 *transfer_buffer;
1116         int retval = 0;
1117         int t;
1118
1119         dbg("%s - command %d", __func__, command);
1120
1121         command_port = port->serial->port[COMMAND_PORT];
1122         command_info = usb_get_serial_port_data(command_port);
1123         mutex_lock(&command_info->mutex);
1124         command_info->command_finished = false;
1125
1126         transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
1127         transfer_buffer[0] = command;
1128         memcpy (&transfer_buffer[1], data, datasize);
1129         command_port->write_urb->transfer_buffer_length = datasize + 1;
1130         command_port->write_urb->dev = port->serial->dev;
1131         retval = usb_submit_urb (command_port->write_urb, GFP_NOIO);
1132         if (retval) {
1133                 dbg("%s - submit urb failed", __func__);
1134                 goto exit;
1135         }
1136
1137         /* wait for the command to complete */
1138         t = wait_event_timeout(command_info->wait_command,
1139                 (bool)command_info->command_finished, COMMAND_TIMEOUT);
1140         if (!t)
1141                 usb_kill_urb(command_port->write_urb);
1142
1143         if (command_info->command_finished == false) {
1144                 dbg("%s - command timed out.", __func__);
1145                 retval = -ETIMEDOUT;
1146                 goto exit;
1147         }
1148
1149         if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
1150                 dbg("%s - command failed.", __func__);
1151                 retval = -EIO;
1152                 goto exit;
1153         }
1154
1155         if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
1156                 dbg("%s - command completed.", __func__);
1157                 switch (command) {
1158                         case WHITEHEAT_GET_DTR_RTS:
1159                                 info = usb_get_serial_port_data(port);
1160                                 memcpy(&info->mcr, command_info->result_buffer, sizeof(struct whiteheat_dr_info));
1161                                 break;
1162                 }
1163         }
1164
1165 exit:
1166         mutex_unlock(&command_info->mutex);
1167         return retval;
1168 }
1169
1170
1171 static int firm_open(struct usb_serial_port *port) {
1172         struct whiteheat_simple open_command;
1173
1174         open_command.port = port->number - port->serial->minor + 1;
1175         return firm_send_command(port, WHITEHEAT_OPEN, (__u8 *)&open_command, sizeof(open_command));
1176 }
1177
1178
1179 static int firm_close(struct usb_serial_port *port) {
1180         struct whiteheat_simple close_command;
1181
1182         close_command.port = port->number - port->serial->minor + 1;
1183         return firm_send_command(port, WHITEHEAT_CLOSE, (__u8 *)&close_command, sizeof(close_command));
1184 }
1185
1186
1187 static int firm_setup_port(struct usb_serial_port *port) {
1188         struct whiteheat_port_settings port_settings;
1189         unsigned int cflag = port->tty->termios->c_cflag;
1190
1191         port_settings.port = port->number + 1;
1192
1193         /* get the byte size */
1194         switch (cflag & CSIZE) {
1195                 case CS5:       port_settings.bits = 5;   break;
1196                 case CS6:       port_settings.bits = 6;   break;
1197                 case CS7:       port_settings.bits = 7;   break;
1198                 default:
1199                 case CS8:       port_settings.bits = 8;   break;
1200         }
1201         dbg("%s - data bits = %d", __func__, port_settings.bits);
1202
1203         /* determine the parity */
1204         if (cflag & PARENB)
1205                 if (cflag & CMSPAR)
1206                         if (cflag & PARODD)
1207                                 port_settings.parity = WHITEHEAT_PAR_MARK;
1208                         else
1209                                 port_settings.parity = WHITEHEAT_PAR_SPACE;
1210                 else
1211                         if (cflag & PARODD)
1212                                 port_settings.parity = WHITEHEAT_PAR_ODD;
1213                         else
1214                                 port_settings.parity = WHITEHEAT_PAR_EVEN;
1215         else
1216                 port_settings.parity = WHITEHEAT_PAR_NONE;
1217         dbg("%s - parity = %c", __func__, port_settings.parity);
1218
1219         /* figure out the stop bits requested */
1220         if (cflag & CSTOPB)
1221                 port_settings.stop = 2;
1222         else
1223                 port_settings.stop = 1;
1224         dbg("%s - stop bits = %d", __func__, port_settings.stop);
1225
1226         /* figure out the flow control settings */
1227         if (cflag & CRTSCTS)
1228                 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | WHITEHEAT_HFLOW_RTS);
1229         else
1230                 port_settings.hflow = WHITEHEAT_HFLOW_NONE;
1231         dbg("%s - hardware flow control = %s %s %s %s", __func__,
1232             (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
1233             (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
1234             (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
1235             (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
1236
1237         /* determine software flow control */
1238         if (I_IXOFF(port->tty))
1239                 port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
1240         else
1241                 port_settings.sflow = WHITEHEAT_SFLOW_NONE;
1242         dbg("%s - software flow control = %c", __func__, port_settings.sflow);
1243
1244         port_settings.xon = START_CHAR(port->tty);
1245         port_settings.xoff = STOP_CHAR(port->tty);
1246         dbg("%s - XON = %2x, XOFF = %2x", __func__, port_settings.xon, port_settings.xoff);
1247
1248         /* get the baud rate wanted */
1249         port_settings.baud = tty_get_baud_rate(port->tty);
1250         dbg("%s - baud rate = %d", __func__, port_settings.baud);
1251
1252         /* fixme: should set validated settings */
1253         tty_encode_baud_rate(port->tty, port_settings.baud, port_settings.baud);
1254         /* handle any settings that aren't specified in the tty structure */
1255         port_settings.lloop = 0;
1256
1257         /* now send the message to the device */
1258         return firm_send_command(port, WHITEHEAT_SETUP_PORT, (__u8 *)&port_settings, sizeof(port_settings));
1259 }
1260
1261
1262 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) {
1263         struct whiteheat_set_rdb rts_command;
1264
1265         rts_command.port = port->number - port->serial->minor + 1;
1266         rts_command.state = onoff;
1267         return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&rts_command, sizeof(rts_command));
1268 }
1269
1270
1271 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) {
1272         struct whiteheat_set_rdb dtr_command;
1273
1274         dtr_command.port = port->number - port->serial->minor + 1;
1275         dtr_command.state = onoff;
1276         return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&dtr_command, sizeof(dtr_command));
1277 }
1278
1279
1280 static int firm_set_break(struct usb_serial_port *port, __u8 onoff) {
1281         struct whiteheat_set_rdb break_command;
1282
1283         break_command.port = port->number - port->serial->minor + 1;
1284         break_command.state = onoff;
1285         return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&break_command, sizeof(break_command));
1286 }
1287
1288
1289 static int firm_purge(struct usb_serial_port *port, __u8 rxtx) {
1290         struct whiteheat_purge purge_command;
1291
1292         purge_command.port = port->number - port->serial->minor + 1;
1293         purge_command.what = rxtx;
1294         return firm_send_command(port, WHITEHEAT_PURGE, (__u8 *)&purge_command, sizeof(purge_command));
1295 }
1296
1297
1298 static int firm_get_dtr_rts(struct usb_serial_port *port) {
1299         struct whiteheat_simple get_dr_command;
1300
1301         get_dr_command.port = port->number - port->serial->minor + 1;
1302         return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, (__u8 *)&get_dr_command, sizeof(get_dr_command));
1303 }
1304
1305
1306 static int firm_report_tx_done(struct usb_serial_port *port) {
1307         struct whiteheat_simple close_command;
1308
1309         close_command.port = port->number - port->serial->minor + 1;
1310         return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, (__u8 *)&close_command, sizeof(close_command));
1311 }
1312
1313
1314 /*****************************************************************************
1315  * Connect Tech's White Heat utility functions
1316  *****************************************************************************/
1317 static int start_command_port(struct usb_serial *serial)
1318 {
1319         struct usb_serial_port *command_port;
1320         struct whiteheat_command_private *command_info;
1321         int retval = 0;
1322
1323         command_port = serial->port[COMMAND_PORT];
1324         command_info = usb_get_serial_port_data(command_port);
1325         mutex_lock(&command_info->mutex);
1326         if (!command_info->port_running) {
1327                 /* Work around HCD bugs */
1328                 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
1329
1330                 command_port->read_urb->dev = serial->dev;
1331                 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
1332                 if (retval) {
1333                         err("%s - failed submitting read urb, error %d", __func__, retval);
1334                         goto exit;
1335                 }
1336         }
1337         command_info->port_running++;
1338
1339 exit:
1340         mutex_unlock(&command_info->mutex);
1341         return retval;
1342 }
1343
1344
1345 static void stop_command_port(struct usb_serial *serial)
1346 {
1347         struct usb_serial_port *command_port;
1348         struct whiteheat_command_private *command_info;
1349
1350         command_port = serial->port[COMMAND_PORT];
1351         command_info = usb_get_serial_port_data(command_port);
1352         mutex_lock(&command_info->mutex);
1353         command_info->port_running--;
1354         if (!command_info->port_running)
1355                 usb_kill_urb(command_port->read_urb);
1356         mutex_unlock(&command_info->mutex);
1357 }
1358
1359
1360 static int start_port_read(struct usb_serial_port *port)
1361 {
1362         struct whiteheat_private *info = usb_get_serial_port_data(port);
1363         struct whiteheat_urb_wrap *wrap;
1364         struct urb *urb;
1365         int retval = 0;
1366         unsigned long flags;
1367         struct list_head *tmp;
1368         struct list_head *tmp2;
1369
1370         spin_lock_irqsave(&info->lock, flags);
1371
1372         list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
1373                 list_del(tmp);
1374                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1375                 urb = wrap->urb;
1376                 urb->dev = port->serial->dev;
1377                 spin_unlock_irqrestore(&info->lock, flags);
1378                 retval = usb_submit_urb(urb, GFP_KERNEL);
1379                 if (retval) {
1380                         spin_lock_irqsave(&info->lock, flags);
1381                         list_add(tmp, &info->rx_urbs_free);
1382                         list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
1383                                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1384                                 urb = wrap->urb;
1385                                 list_del(tmp);
1386                                 spin_unlock_irqrestore(&info->lock, flags);
1387                                 usb_kill_urb(urb);
1388                                 spin_lock_irqsave(&info->lock, flags);
1389                                 list_add(tmp, &info->rx_urbs_free);
1390                         }
1391                         break;
1392                 }
1393                 spin_lock_irqsave(&info->lock, flags);
1394                 list_add(tmp, &info->rx_urbs_submitted);
1395         }
1396
1397         spin_unlock_irqrestore(&info->lock, flags);
1398
1399         return retval;
1400 }
1401
1402
1403 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb* urb, struct list_head *head)
1404 {
1405         struct whiteheat_urb_wrap *wrap;
1406         struct list_head *tmp;
1407
1408         list_for_each(tmp, head) {
1409                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1410                 if (wrap->urb == urb)
1411                         return wrap;
1412         }
1413
1414         return NULL;
1415 }
1416
1417
1418 static struct list_head *list_first(struct list_head *head)
1419 {
1420         return head->next;
1421 }
1422
1423
1424 static void rx_data_softint(struct work_struct *work)
1425 {
1426         struct whiteheat_private *info =
1427                 container_of(work, struct whiteheat_private, rx_work);
1428         struct usb_serial_port *port = info->port;
1429         struct tty_struct *tty = port->tty;
1430         struct whiteheat_urb_wrap *wrap;
1431         struct urb *urb;
1432         unsigned long flags;
1433         struct list_head *tmp;
1434         struct list_head *tmp2;
1435         int result;
1436         int sent = 0;
1437
1438         spin_lock_irqsave(&info->lock, flags);
1439         if (info->flags & THROTTLED) {
1440                 spin_unlock_irqrestore(&info->lock, flags);
1441                 return;
1442         }
1443
1444         list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
1445                 list_del(tmp);
1446                 spin_unlock_irqrestore(&info->lock, flags);
1447
1448                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1449                 urb = wrap->urb;
1450
1451                 if (tty && urb->actual_length) {
1452                         int len = tty_buffer_request_room(tty, urb->actual_length);
1453                         /* This stuff can go away now I suspect */
1454                         if (unlikely(len < urb->actual_length)) {
1455                                 spin_lock_irqsave(&info->lock, flags);
1456                                 list_add(tmp, &info->rx_urb_q);
1457                                 spin_unlock_irqrestore(&info->lock, flags);
1458                                 tty_flip_buffer_push(tty);
1459                                 schedule_work(&info->rx_work);
1460                                 return;
1461                         }
1462                         tty_insert_flip_string(tty, urb->transfer_buffer, len);
1463                         sent += len;
1464                 }
1465
1466                 urb->dev = port->serial->dev;
1467                 result = usb_submit_urb(urb, GFP_ATOMIC);
1468                 if (result) {
1469                         err("%s - failed resubmitting read urb, error %d", __func__, result);
1470                         spin_lock_irqsave(&info->lock, flags);
1471                         list_add(tmp, &info->rx_urbs_free);
1472                         continue;
1473                 }
1474
1475                 spin_lock_irqsave(&info->lock, flags);
1476                 list_add(tmp, &info->rx_urbs_submitted);
1477         }
1478         spin_unlock_irqrestore(&info->lock, flags);
1479
1480         if (sent)
1481                 tty_flip_buffer_push(tty);
1482 }
1483
1484
1485 /*****************************************************************************
1486  * Connect Tech's White Heat module functions
1487  *****************************************************************************/
1488 static int __init whiteheat_init (void)
1489 {
1490         int retval;
1491         retval = usb_serial_register(&whiteheat_fake_device);
1492         if (retval)
1493                 goto failed_fake_register;
1494         retval = usb_serial_register(&whiteheat_device);
1495         if (retval)
1496                 goto failed_device_register;
1497         retval = usb_register(&whiteheat_driver);
1498         if (retval)
1499                 goto failed_usb_register;
1500         info(DRIVER_DESC " " DRIVER_VERSION);
1501         return 0;
1502 failed_usb_register:
1503         usb_serial_deregister(&whiteheat_device);
1504 failed_device_register:
1505         usb_serial_deregister(&whiteheat_fake_device);
1506 failed_fake_register:
1507         return retval;
1508 }
1509
1510
1511 static void __exit whiteheat_exit (void)
1512 {
1513         usb_deregister (&whiteheat_driver);
1514         usb_serial_deregister (&whiteheat_fake_device);
1515         usb_serial_deregister (&whiteheat_device);
1516 }
1517
1518
1519 module_init(whiteheat_init);
1520 module_exit(whiteheat_exit);
1521
1522 MODULE_AUTHOR( DRIVER_AUTHOR );
1523 MODULE_DESCRIPTION( DRIVER_DESC );
1524 MODULE_LICENSE("GPL");
1525
1526 MODULE_FIRMWARE("whiteheat.fw");
1527 MODULE_FIRMWARE("whiteheat_loader.fw");
1528
1529 module_param(urb_pool_size, int, 0);
1530 MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering");
1531
1532 module_param(debug, bool, S_IRUGO | S_IWUSR);
1533 MODULE_PARM_DESC(debug, "Debug enabled or not");