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