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