drivers/usb/serial/whiteheat.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * USB ConnectTech WhiteHEAT driver
   4  *
   5  *      Copyright (C) 2002
   6  *          Connect Tech Inc.
   7  *
   8  *      Copyright (C) 1999 - 2001
   9  *          Greg Kroah-Hartman (greg@kroah.com)
  10  *
  11  * See Documentation/usb/usb-serial.rst for more information on using this
  12  * driver
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/errno.h>
  17 #include <linux/slab.h>
  18 #include <linux/tty.h>
  19 #include <linux/tty_driver.h>
  20 #include <linux/tty_flip.h>
  21 #include <linux/module.h>
  22 #include <linux/spinlock.h>
  23 #include <linux/mutex.h>
  24 #include <linux/uaccess.h>
  25 #include <asm/termbits.h>
  26 #include <linux/usb.h>
  27 #include <linux/serial_reg.h>
  28 #include <linux/serial.h>
  29 #include <linux/usb/serial.h>
  30 #include <linux/usb/ezusb.h>
  31 #include "whiteheat.h"                  /* WhiteHEAT specific commands */
  32
  33 #ifndef CMSPAR
  34 #define CMSPAR 0
  35 #endif
  36
  37 /*
  38  * Version Information
  39  */
  40 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>"
  41 #define DRIVER_DESC "USB ConnectTech WhiteHEAT driver"
  42
  43 #define CONNECT_TECH_VENDOR_ID          0x0710
  44 #define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001
  45 #define CONNECT_TECH_WHITE_HEAT_ID      0x8001
  46
  47 /*
  48    ID tables for whiteheat are unusual, because we want to different
  49    things for different versions of the device.  Eventually, this
  50    will be doable from a single table.  But, for now, we define two
  51    separate ID tables, and then a third table that combines them
  52    just for the purpose of exporting the autoloading information.
  53 */
  54 static const struct usb_device_id id_table_std[] = {
  55         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
  56         { }                                             /* Terminating entry */
  57 };
  58
  59 static const struct usb_device_id id_table_prerenumeration[] = {
  60         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
  61         { }                                             /* Terminating entry */
  62 };
  63
  64 static const struct usb_device_id id_table_combined[] = {
  65         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
  66         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
  67         { }                                             /* Terminating entry */
  68 };
  69
  70 MODULE_DEVICE_TABLE(usb, id_table_combined);
  71
  72
  73 /* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */
  74 static int  whiteheat_firmware_download(struct usb_serial *serial,
  75                                         const struct usb_device_id *id);
  76 static int  whiteheat_firmware_attach(struct usb_serial *serial);
  77
  78 /* function prototypes for the Connect Tech WhiteHEAT serial converter */
  79 static int  whiteheat_attach(struct usb_serial *serial);
  80 static void whiteheat_release(struct usb_serial *serial);
  81 static int  whiteheat_port_probe(struct usb_serial_port *port);
  82 static void whiteheat_port_remove(struct usb_serial_port *port);
  83 static int  whiteheat_open(struct tty_struct *tty,
  84                         struct usb_serial_port *port);
  85 static void whiteheat_close(struct usb_serial_port *port);
  86 static void whiteheat_get_serial(struct tty_struct *tty,
  87                         struct serial_struct *ss);
  88 static void whiteheat_set_termios(struct tty_struct *tty,
  89                         struct usb_serial_port *port, struct ktermios *old);
  90 static int  whiteheat_tiocmget(struct tty_struct *tty);
  91 static int  whiteheat_tiocmset(struct tty_struct *tty,
  92                         unsigned int set, unsigned int clear);
  93 static void whiteheat_break_ctl(struct tty_struct *tty, int break_state);
  94
  95 static struct usb_serial_driver whiteheat_fake_device = {
  96         .driver = {
  97                 .owner =        THIS_MODULE,
  98                 .name =         "whiteheatnofirm",
  99         },
 100         .description =          "Connect Tech - WhiteHEAT - (prerenumeration)",
 101         .id_table =             id_table_prerenumeration,
 102         .num_ports =            1,
 103         .probe =                whiteheat_firmware_download,
 104         .attach =               whiteheat_firmware_attach,
 105 };
 106
 107 static struct usb_serial_driver whiteheat_device = {
 108         .driver = {
 109                 .owner =        THIS_MODULE,
 110                 .name =         "whiteheat",
 111         },
 112         .description =          "Connect Tech - WhiteHEAT",
 113         .id_table =             id_table_std,
 114         .num_ports =            4,
 115         .num_bulk_in =          5,
 116         .num_bulk_out =         5,
 117         .attach =               whiteheat_attach,
 118         .release =              whiteheat_release,
 119         .port_probe =           whiteheat_port_probe,
 120         .port_remove =          whiteheat_port_remove,
 121         .open =                 whiteheat_open,
 122         .close =                whiteheat_close,
 123         .get_serial =           whiteheat_get_serial,
 124         .set_termios =          whiteheat_set_termios,
 125         .break_ctl =            whiteheat_break_ctl,
 126         .tiocmget =             whiteheat_tiocmget,
 127         .tiocmset =             whiteheat_tiocmset,
 128         .throttle =             usb_serial_generic_throttle,
 129         .unthrottle =           usb_serial_generic_unthrottle,
 130 };
 131
 132 static struct usb_serial_driver * const serial_drivers[] = {
 133         &whiteheat_fake_device, &whiteheat_device, NULL
 134 };
 135
 136 struct whiteheat_command_private {
 137         struct mutex            mutex;
 138         __u8                    port_running;
 139         __u8                    command_finished;
 140         wait_queue_head_t       wait_command; /* for handling sleeping whilst
 141                                                  waiting for a command to
 142                                                  finish */
 143         __u8                    result_buffer[64];
 144 };
 145
 146 struct whiteheat_private {
 147         __u8                    mcr;            /* FIXME: no locking on mcr */
 148 };
 149
 150
 151 /* local function prototypes */
 152 static int start_command_port(struct usb_serial *serial);
 153 static void stop_command_port(struct usb_serial *serial);
 154 static void command_port_write_callback(struct urb *urb);
 155 static void command_port_read_callback(struct urb *urb);
 156
 157 static int firm_send_command(struct usb_serial_port *port, __u8 command,
 158                                                 __u8 *data, __u8 datasize);
 159 static int firm_open(struct usb_serial_port *port);
 160 static int firm_close(struct usb_serial_port *port);
 161 static void firm_setup_port(struct tty_struct *tty);
 162 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
 163 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
 164 static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
 165 static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
 166 static int firm_get_dtr_rts(struct usb_serial_port *port);
 167 static int firm_report_tx_done(struct usb_serial_port *port);
 168
 169
 170 #define COMMAND_PORT            4
 171 #define COMMAND_TIMEOUT         (2*HZ)  /* 2 second timeout for a command */
 172 #define COMMAND_TIMEOUT_MS      2000
 173
 174
 175 /*****************************************************************************
 176  * Connect Tech's White Heat prerenumeration driver functions
 177  *****************************************************************************/
 178
 179 /* steps to download the firmware to the WhiteHEAT device:
 180  - hold the reset (by writing to the reset bit of the CPUCS register)
 181  - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
 182  - release the reset (by writing to the CPUCS register)
 183  - download the WH.HEX file for all addresses greater than 0x1b3f using
 184    VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
 185  - hold the reset
 186  - download the WH.HEX file for all addresses less than 0x1b40 using
 187    VENDOR_REQUEST_ANCHOR_LOAD
 188  - release the reset
 189  - device renumerated itself and comes up as new device id with all
 190    firmware download completed.
 191 */
 192 static int whiteheat_firmware_download(struct usb_serial *serial,
 193                                         const struct usb_device_id *id)
 194 {
 195         int response;
 196
 197         response = ezusb_fx1_ihex_firmware_download(serial->dev, "whiteheat_loader.fw");
 198         if (response >= 0) {
 199                 response = ezusb_fx1_ihex_firmware_download(serial->dev, "whiteheat.fw");
 200                 if (response >= 0)
 201                         return 0;
 202         }
 203         return -ENOENT;
 204 }
 205
 206
 207 static int whiteheat_firmware_attach(struct usb_serial *serial)
 208 {
 209         /* We want this device to fail to have a driver assigned to it */
 210         return 1;
 211 }
 212
 213
 214 /*****************************************************************************
 215  * Connect Tech's White Heat serial driver functions
 216  *****************************************************************************/
 217
 218 static int whiteheat_attach(struct usb_serial *serial)
 219 {
 220         struct usb_serial_port *command_port;
 221         struct whiteheat_command_private *command_info;
 222         struct whiteheat_hw_info *hw_info;
 223         int pipe;
 224         int ret;
 225         int alen;
 226         __u8 *command;
 227         __u8 *result;
 228
 229         command_port = serial->port[COMMAND_PORT];
 230
 231         pipe = usb_sndbulkpipe(serial->dev,
 232                         command_port->bulk_out_endpointAddress);
 233         command = kmalloc(2, GFP_KERNEL);
 234         if (!command)
 235                 goto no_command_buffer;
 236         command[0] = WHITEHEAT_GET_HW_INFO;
 237         command[1] = 0;
 238
 239         result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
 240         if (!result)
 241                 goto no_result_buffer;
 242         /*
 243          * When the module is reloaded the firmware is still there and
 244          * the endpoints are still in the usb core unchanged. This is the
 245          * unlinking bug in disguise. Same for the call below.
 246          */
 247         usb_clear_halt(serial->dev, pipe);
 248         ret = usb_bulk_msg(serial->dev, pipe, command, 2,
 249                                                 &alen, COMMAND_TIMEOUT_MS);
 250         if (ret) {
 251                 dev_err(&serial->dev->dev, "%s: Couldn't send command [%d]\n",
 252                         serial->type->description, ret);
 253                 goto no_firmware;
 254         } else if (alen != 2) {
 255                 dev_err(&serial->dev->dev, "%s: Send command incomplete [%d]\n",
 256                         serial->type->description, alen);
 257                 goto no_firmware;
 258         }
 259
 260         pipe = usb_rcvbulkpipe(serial->dev,
 261                                 command_port->bulk_in_endpointAddress);
 262         /* See the comment on the usb_clear_halt() above */
 263         usb_clear_halt(serial->dev, pipe);
 264         ret = usb_bulk_msg(serial->dev, pipe, result,
 265                         sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
 266         if (ret) {
 267                 dev_err(&serial->dev->dev, "%s: Couldn't get results [%d]\n",
 268                         serial->type->description, ret);
 269                 goto no_firmware;
 270         } else if (alen != sizeof(*hw_info) + 1) {
 271                 dev_err(&serial->dev->dev, "%s: Get results incomplete [%d]\n",
 272                         serial->type->description, alen);
 273                 goto no_firmware;
 274         } else if (result[0] != command[0]) {
 275                 dev_err(&serial->dev->dev, "%s: Command failed [%d]\n",
 276                         serial->type->description, result[0]);
 277                 goto no_firmware;
 278         }
 279
 280         hw_info = (struct whiteheat_hw_info *)&result[1];
 281
 282         dev_info(&serial->dev->dev, "%s: Firmware v%d.%02d\n",
 283                  serial->type->description,
 284                  hw_info->sw_major_rev, hw_info->sw_minor_rev);
 285
 286         command_info = kmalloc(sizeof(struct whiteheat_command_private),
 287                                                                 GFP_KERNEL);
 288         if (!command_info)
 289                 goto no_command_private;
 290
 291         mutex_init(&command_info->mutex);
 292         command_info->port_running = 0;
 293         init_waitqueue_head(&command_info->wait_command);
 294         usb_set_serial_port_data(command_port, command_info);
 295         command_port->write_urb->complete = command_port_write_callback;
 296         command_port->read_urb->complete = command_port_read_callback;
 297         kfree(result);
 298         kfree(command);
 299
 300         return 0;
 301
 302 no_firmware:
 303         /* Firmware likely not running */
 304         dev_err(&serial->dev->dev,
 305                 "%s: Unable to retrieve firmware version, try replugging\n",
 306                 serial->type->description);
 307         dev_err(&serial->dev->dev,
 308                 "%s: If the firmware is not running (status led not blinking)\n",
 309                 serial->type->description);
 310         dev_err(&serial->dev->dev,
 311                 "%s: please contact support@connecttech.com\n",
 312                 serial->type->description);
 313         kfree(result);
 314         kfree(command);
 315         return -ENODEV;
 316
 317 no_command_private:
 318         kfree(result);
 319 no_result_buffer:
 320         kfree(command);
 321 no_command_buffer:
 322         return -ENOMEM;
 323 }
 324
 325 static void whiteheat_release(struct usb_serial *serial)
 326 {
 327         struct usb_serial_port *command_port;
 328
 329         /* free up our private data for our command port */
 330         command_port = serial->port[COMMAND_PORT];
 331         kfree(usb_get_serial_port_data(command_port));
 332 }
 333
 334 static int whiteheat_port_probe(struct usb_serial_port *port)
 335 {
 336         struct whiteheat_private *info;
 337
 338         info = kzalloc(sizeof(*info), GFP_KERNEL);
 339         if (!info)
 340                 return -ENOMEM;
 341
 342         usb_set_serial_port_data(port, info);
 343
 344         return 0;
 345 }
 346
 347 static void whiteheat_port_remove(struct usb_serial_port *port)
 348 {
 349         struct whiteheat_private *info;
 350
 351         info = usb_get_serial_port_data(port);
 352         kfree(info);
 353 }
 354
 355 static int whiteheat_open(struct tty_struct *tty, struct usb_serial_port *port)
 356 {
 357         int retval;
 358
 359         retval = start_command_port(port->serial);
 360         if (retval)
 361                 goto exit;
 362
 363         /* send an open port command */
 364         retval = firm_open(port);
 365         if (retval) {
 366                 stop_command_port(port->serial);
 367                 goto exit;
 368         }
 369
 370         retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX);
 371         if (retval) {
 372                 firm_close(port);
 373                 stop_command_port(port->serial);
 374                 goto exit;
 375         }
 376
 377         if (tty)
 378                 firm_setup_port(tty);
 379
 380         /* Work around HCD bugs */
 381         usb_clear_halt(port->serial->dev, port->read_urb->pipe);
 382         usb_clear_halt(port->serial->dev, port->write_urb->pipe);
 383
 384         retval = usb_serial_generic_open(tty, port);
 385         if (retval) {
 386                 firm_close(port);
 387                 stop_command_port(port->serial);
 388                 goto exit;
 389         }
 390 exit:
 391         return retval;
 392 }
 393
 394
 395 static void whiteheat_close(struct usb_serial_port *port)
 396 {
 397         firm_report_tx_done(port);
 398         firm_close(port);
 399
 400         usb_serial_generic_close(port);
 401
 402         stop_command_port(port->serial);
 403 }
 404
 405 static int whiteheat_tiocmget(struct tty_struct *tty)
 406 {
 407         struct usb_serial_port *port = tty->driver_data;
 408         struct whiteheat_private *info = usb_get_serial_port_data(port);
 409         unsigned int modem_signals = 0;
 410
 411         firm_get_dtr_rts(port);
 412         if (info->mcr & UART_MCR_DTR)
 413                 modem_signals |= TIOCM_DTR;
 414         if (info->mcr & UART_MCR_RTS)
 415                 modem_signals |= TIOCM_RTS;
 416
 417         return modem_signals;
 418 }
 419
 420 static int whiteheat_tiocmset(struct tty_struct *tty,
 421                                unsigned int set, unsigned int clear)
 422 {
 423         struct usb_serial_port *port = tty->driver_data;
 424         struct whiteheat_private *info = usb_get_serial_port_data(port);
 425
 426         if (set & TIOCM_RTS)
 427                 info->mcr |= UART_MCR_RTS;
 428         if (set & TIOCM_DTR)
 429                 info->mcr |= UART_MCR_DTR;
 430
 431         if (clear & TIOCM_RTS)
 432                 info->mcr &= ~UART_MCR_RTS;
 433         if (clear & TIOCM_DTR)
 434                 info->mcr &= ~UART_MCR_DTR;
 435
 436         firm_set_dtr(port, info->mcr & UART_MCR_DTR);
 437         firm_set_rts(port, info->mcr & UART_MCR_RTS);
 438         return 0;
 439 }
 440
 441
 442 static void whiteheat_get_serial(struct tty_struct *tty, struct serial_struct *ss)
 443 {
 444         ss->baud_base = 460800;
 445 }
 446
 447
 448 static void whiteheat_set_termios(struct tty_struct *tty,
 449         struct usb_serial_port *port, struct ktermios *old_termios)
 450 {
 451         firm_setup_port(tty);
 452 }
 453
 454 static void whiteheat_break_ctl(struct tty_struct *tty, int break_state)
 455 {
 456         struct usb_serial_port *port = tty->driver_data;
 457         firm_set_break(port, break_state);
 458 }
 459
 460
 461 /*****************************************************************************
 462  * Connect Tech's White Heat callback routines
 463  *****************************************************************************/
 464 static void command_port_write_callback(struct urb *urb)
 465 {
 466         int status = urb->status;
 467
 468         if (status) {
 469                 dev_dbg(&urb->dev->dev, "nonzero urb status: %d\n", status);
 470                 return;
 471         }
 472 }
 473
 474
 475 static void command_port_read_callback(struct urb *urb)
 476 {
 477         struct usb_serial_port *command_port = urb->context;
 478         struct whiteheat_command_private *command_info;
 479         int status = urb->status;
 480         unsigned char *data = urb->transfer_buffer;
 481         int result;
 482
 483         command_info = usb_get_serial_port_data(command_port);
 484         if (!command_info) {
 485                 dev_dbg(&urb->dev->dev, "%s - command_info is NULL, exiting.\n", __func__);
 486                 return;
 487         }
 488         if (!urb->actual_length) {
 489                 dev_dbg(&urb->dev->dev, "%s - empty response, exiting.\n", __func__);
 490                 return;
 491         }
 492         if (status) {
 493                 dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n", __func__, status);
 494                 if (status != -ENOENT)
 495                         command_info->command_finished = WHITEHEAT_CMD_FAILURE;
 496                 wake_up(&command_info->wait_command);
 497                 return;
 498         }
 499
 500         usb_serial_debug_data(&command_port->dev, __func__, urb->actual_length, data);
 501
 502         if (data[0] == WHITEHEAT_CMD_COMPLETE) {
 503                 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
 504                 wake_up(&command_info->wait_command);
 505         } else if (data[0] == WHITEHEAT_CMD_FAILURE) {
 506                 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
 507                 wake_up(&command_info->wait_command);
 508         } else if (data[0] == WHITEHEAT_EVENT) {
 509                 /* These are unsolicited reports from the firmware, hence no
 510                    waiting command to wakeup */
 511                 dev_dbg(&urb->dev->dev, "%s - event received\n", __func__);
 512         } else if ((data[0] == WHITEHEAT_GET_DTR_RTS) &&
 513                 (urb->actual_length - 1 <= sizeof(command_info->result_buffer))) {
 514                 memcpy(command_info->result_buffer, &data[1],
 515                                                 urb->actual_length - 1);
 516                 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
 517                 wake_up(&command_info->wait_command);
 518         } else
 519                 dev_dbg(&urb->dev->dev, "%s - bad reply from firmware\n", __func__);
 520
 521         /* Continue trying to always read */
 522         result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
 523         if (result)
 524                 dev_dbg(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n",
 525                         __func__, result);
 526 }
 527
 528
 529 /*****************************************************************************
 530  * Connect Tech's White Heat firmware interface
 531  *****************************************************************************/
 532 static int firm_send_command(struct usb_serial_port *port, __u8 command,
 533                                                 __u8 *data, __u8 datasize)
 534 {
 535         struct usb_serial_port *command_port;
 536         struct whiteheat_command_private *command_info;
 537         struct whiteheat_private *info;
 538         struct device *dev = &port->dev;
 539         __u8 *transfer_buffer;
 540         int retval = 0;
 541         int t;
 542
 543         dev_dbg(dev, "%s - command %d\n", __func__, command);
 544
 545         command_port = port->serial->port[COMMAND_PORT];
 546         command_info = usb_get_serial_port_data(command_port);
 547
 548         if (command_port->bulk_out_size < datasize + 1)
 549                 return -EIO;
 550
 551         mutex_lock(&command_info->mutex);
 552         command_info->command_finished = false;
 553
 554         transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
 555         transfer_buffer[0] = command;
 556         memcpy(&transfer_buffer[1], data, datasize);
 557         command_port->write_urb->transfer_buffer_length = datasize + 1;
 558         retval = usb_submit_urb(command_port->write_urb, GFP_NOIO);
 559         if (retval) {
 560                 dev_dbg(dev, "%s - submit urb failed\n", __func__);
 561                 goto exit;
 562         }
 563
 564         /* wait for the command to complete */
 565         t = wait_event_timeout(command_info->wait_command,
 566                 (bool)command_info->command_finished, COMMAND_TIMEOUT);
 567         if (!t)
 568                 usb_kill_urb(command_port->write_urb);
 569
 570         if (command_info->command_finished == false) {
 571                 dev_dbg(dev, "%s - command timed out.\n", __func__);
 572                 retval = -ETIMEDOUT;
 573                 goto exit;
 574         }
 575
 576         if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
 577                 dev_dbg(dev, "%s - command failed.\n", __func__);
 578                 retval = -EIO;
 579                 goto exit;
 580         }
 581
 582         if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
 583                 dev_dbg(dev, "%s - command completed.\n", __func__);
 584                 switch (command) {
 585                 case WHITEHEAT_GET_DTR_RTS:
 586                         info = usb_get_serial_port_data(port);
 587                         info->mcr = command_info->result_buffer[0];
 588                         break;
 589                 }
 590         }
 591 exit:
 592         mutex_unlock(&command_info->mutex);
 593         return retval;
 594 }
 595
 596
 597 static int firm_open(struct usb_serial_port *port)
 598 {
 599         struct whiteheat_simple open_command;
 600
 601         open_command.port = port->port_number + 1;
 602         return firm_send_command(port, WHITEHEAT_OPEN,
 603                 (__u8 *)&open_command, sizeof(open_command));
 604 }
 605
 606
 607 static int firm_close(struct usb_serial_port *port)
 608 {
 609         struct whiteheat_simple close_command;
 610
 611         close_command.port = port->port_number + 1;
 612         return firm_send_command(port, WHITEHEAT_CLOSE,
 613                         (__u8 *)&close_command, sizeof(close_command));
 614 }
 615
 616
 617 static void firm_setup_port(struct tty_struct *tty)
 618 {
 619         struct usb_serial_port *port = tty->driver_data;
 620         struct device *dev = &port->dev;
 621         struct whiteheat_port_settings port_settings;
 622         unsigned int cflag = tty->termios.c_cflag;
 623         speed_t baud;
 624
 625         port_settings.port = port->port_number + 1;
 626
 627         port_settings.bits = tty_get_char_size(cflag);
 628         dev_dbg(dev, "%s - data bits = %d\n", __func__, port_settings.bits);
 629
 630         /* determine the parity */
 631         if (cflag & PARENB)
 632                 if (cflag & CMSPAR)
 633                         if (cflag & PARODD)
 634                                 port_settings.parity = WHITEHEAT_PAR_MARK;
 635                         else
 636                                 port_settings.parity = WHITEHEAT_PAR_SPACE;
 637                 else
 638                         if (cflag & PARODD)
 639                                 port_settings.parity = WHITEHEAT_PAR_ODD;
 640                         else
 641                                 port_settings.parity = WHITEHEAT_PAR_EVEN;
 642         else
 643                 port_settings.parity = WHITEHEAT_PAR_NONE;
 644         dev_dbg(dev, "%s - parity = %c\n", __func__, port_settings.parity);
 645
 646         /* figure out the stop bits requested */
 647         if (cflag & CSTOPB)
 648                 port_settings.stop = 2;
 649         else
 650                 port_settings.stop = 1;
 651         dev_dbg(dev, "%s - stop bits = %d\n", __func__, port_settings.stop);
 652
 653         /* figure out the flow control settings */
 654         if (cflag & CRTSCTS)
 655                 port_settings.hflow = (WHITEHEAT_HFLOW_CTS |
 656                                                 WHITEHEAT_HFLOW_RTS);
 657         else
 658                 port_settings.hflow = WHITEHEAT_HFLOW_NONE;
 659         dev_dbg(dev, "%s - hardware flow control = %s %s %s %s\n", __func__,
 660             (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
 661             (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
 662             (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
 663             (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
 664
 665         /* determine software flow control */
 666         if (I_IXOFF(tty))
 667                 port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
 668         else
 669                 port_settings.sflow = WHITEHEAT_SFLOW_NONE;
 670         dev_dbg(dev, "%s - software flow control = %c\n", __func__, port_settings.sflow);
 671
 672         port_settings.xon = START_CHAR(tty);
 673         port_settings.xoff = STOP_CHAR(tty);
 674         dev_dbg(dev, "%s - XON = %2x, XOFF = %2x\n", __func__, port_settings.xon, port_settings.xoff);
 675
 676         /* get the baud rate wanted */
 677         baud = tty_get_baud_rate(tty);
 678         port_settings.baud = cpu_to_le32(baud);
 679         dev_dbg(dev, "%s - baud rate = %u\n", __func__, baud);
 680
 681         /* fixme: should set validated settings */
 682         tty_encode_baud_rate(tty, baud, baud);
 683
 684         /* handle any settings that aren't specified in the tty structure */
 685         port_settings.lloop = 0;
 686
 687         /* now send the message to the device */
 688         firm_send_command(port, WHITEHEAT_SETUP_PORT,
 689                         (__u8 *)&port_settings, sizeof(port_settings));
 690 }
 691
 692
 693 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff)
 694 {
 695         struct whiteheat_set_rdb rts_command;
 696
 697         rts_command.port = port->port_number + 1;
 698         rts_command.state = onoff;
 699         return firm_send_command(port, WHITEHEAT_SET_RTS,
 700                         (__u8 *)&rts_command, sizeof(rts_command));
 701 }
 702
 703
 704 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff)
 705 {
 706         struct whiteheat_set_rdb dtr_command;
 707
 708         dtr_command.port = port->port_number + 1;
 709         dtr_command.state = onoff;
 710         return firm_send_command(port, WHITEHEAT_SET_DTR,
 711                         (__u8 *)&dtr_command, sizeof(dtr_command));
 712 }
 713
 714
 715 static int firm_set_break(struct usb_serial_port *port, __u8 onoff)
 716 {
 717         struct whiteheat_set_rdb break_command;
 718
 719         break_command.port = port->port_number + 1;
 720         break_command.state = onoff;
 721         return firm_send_command(port, WHITEHEAT_SET_BREAK,
 722                         (__u8 *)&break_command, sizeof(break_command));
 723 }
 724
 725
 726 static int firm_purge(struct usb_serial_port *port, __u8 rxtx)
 727 {
 728         struct whiteheat_purge purge_command;
 729
 730         purge_command.port = port->port_number + 1;
 731         purge_command.what = rxtx;
 732         return firm_send_command(port, WHITEHEAT_PURGE,
 733                         (__u8 *)&purge_command, sizeof(purge_command));
 734 }
 735
 736
 737 static int firm_get_dtr_rts(struct usb_serial_port *port)
 738 {
 739         struct whiteheat_simple get_dr_command;
 740
 741         get_dr_command.port = port->port_number + 1;
 742         return firm_send_command(port, WHITEHEAT_GET_DTR_RTS,
 743                         (__u8 *)&get_dr_command, sizeof(get_dr_command));
 744 }
 745
 746
 747 static int firm_report_tx_done(struct usb_serial_port *port)
 748 {
 749         struct whiteheat_simple close_command;
 750
 751         close_command.port = port->port_number + 1;
 752         return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE,
 753                         (__u8 *)&close_command, sizeof(close_command));
 754 }
 755
 756
 757 /*****************************************************************************
 758  * Connect Tech's White Heat utility functions
 759  *****************************************************************************/
 760 static int start_command_port(struct usb_serial *serial)
 761 {
 762         struct usb_serial_port *command_port;
 763         struct whiteheat_command_private *command_info;
 764         int retval = 0;
 765
 766         command_port = serial->port[COMMAND_PORT];
 767         command_info = usb_get_serial_port_data(command_port);
 768         mutex_lock(&command_info->mutex);
 769         if (!command_info->port_running) {
 770                 /* Work around HCD bugs */
 771                 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
 772
 773                 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
 774                 if (retval) {
 775                         dev_err(&serial->dev->dev,
 776                                 "%s - failed submitting read urb, error %d\n",
 777                                 __func__, retval);
 778                         goto exit;
 779                 }
 780         }
 781         command_info->port_running++;
 782
 783 exit:
 784         mutex_unlock(&command_info->mutex);
 785         return retval;
 786 }
 787
 788
 789 static void stop_command_port(struct usb_serial *serial)
 790 {
 791         struct usb_serial_port *command_port;
 792         struct whiteheat_command_private *command_info;
 793
 794         command_port = serial->port[COMMAND_PORT];
 795         command_info = usb_get_serial_port_data(command_port);
 796         mutex_lock(&command_info->mutex);
 797         command_info->port_running--;
 798         if (!command_info->port_running)
 799                 usb_kill_urb(command_port->read_urb);
 800         mutex_unlock(&command_info->mutex);
 801 }
 802
 803 module_usb_serial_driver(serial_drivers, id_table_combined);
 804
 805 MODULE_AUTHOR(DRIVER_AUTHOR);
 806 MODULE_DESCRIPTION(DRIVER_DESC);
 807 MODULE_LICENSE("GPL");
 808
 809 MODULE_FIRMWARE("whiteheat.fw");
 810 MODULE_FIRMWARE("whiteheat_loader.fw");