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