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