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