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