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