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 memcpy(&info->mcr, command_info->result_buffer, 588 sizeof(struct whiteheat_dr_info)); 589 break; 590 } 591 } 592 exit: 593 mutex_unlock(&command_info->mutex); 594 return retval; 595 } 596 597 598 static int firm_open(struct usb_serial_port *port) 599 { 600 struct whiteheat_simple open_command; 601 602 open_command.port = port->port_number + 1; 603 return firm_send_command(port, WHITEHEAT_OPEN, 604 (__u8 *)&open_command, sizeof(open_command)); 605 } 606 607 608 static int firm_close(struct usb_serial_port *port) 609 { 610 struct whiteheat_simple close_command; 611 612 close_command.port = port->port_number + 1; 613 return firm_send_command(port, WHITEHEAT_CLOSE, 614 (__u8 *)&close_command, sizeof(close_command)); 615 } 616 617 618 static void firm_setup_port(struct tty_struct *tty) 619 { 620 struct usb_serial_port *port = tty->driver_data; 621 struct device *dev = &port->dev; 622 struct whiteheat_port_settings port_settings; 623 unsigned int cflag = tty->termios.c_cflag; 624 speed_t baud; 625 626 port_settings.port = port->port_number + 1; 627 628 port_settings.bits = tty_get_char_size(cflag); 629 dev_dbg(dev, "%s - data bits = %d\n", __func__, port_settings.bits); 630 631 /* determine the parity */ 632 if (cflag & PARENB) 633 if (cflag & CMSPAR) 634 if (cflag & PARODD) 635 port_settings.parity = WHITEHEAT_PAR_MARK; 636 else 637 port_settings.parity = WHITEHEAT_PAR_SPACE; 638 else 639 if (cflag & PARODD) 640 port_settings.parity = WHITEHEAT_PAR_ODD; 641 else 642 port_settings.parity = WHITEHEAT_PAR_EVEN; 643 else 644 port_settings.parity = WHITEHEAT_PAR_NONE; 645 dev_dbg(dev, "%s - parity = %c\n", __func__, port_settings.parity); 646 647 /* figure out the stop bits requested */ 648 if (cflag & CSTOPB) 649 port_settings.stop = 2; 650 else 651 port_settings.stop = 1; 652 dev_dbg(dev, "%s - stop bits = %d\n", __func__, port_settings.stop); 653 654 /* figure out the flow control settings */ 655 if (cflag & CRTSCTS) 656 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | 657 WHITEHEAT_HFLOW_RTS); 658 else 659 port_settings.hflow = WHITEHEAT_HFLOW_NONE; 660 dev_dbg(dev, "%s - hardware flow control = %s %s %s %s\n", __func__, 661 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "", 662 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "", 663 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "", 664 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : ""); 665 666 /* determine software flow control */ 667 if (I_IXOFF(tty)) 668 port_settings.sflow = WHITEHEAT_SFLOW_RXTX; 669 else 670 port_settings.sflow = WHITEHEAT_SFLOW_NONE; 671 dev_dbg(dev, "%s - software flow control = %c\n", __func__, port_settings.sflow); 672 673 port_settings.xon = START_CHAR(tty); 674 port_settings.xoff = STOP_CHAR(tty); 675 dev_dbg(dev, "%s - XON = %2x, XOFF = %2x\n", __func__, port_settings.xon, port_settings.xoff); 676 677 /* get the baud rate wanted */ 678 baud = tty_get_baud_rate(tty); 679 port_settings.baud = cpu_to_le32(baud); 680 dev_dbg(dev, "%s - baud rate = %u\n", __func__, baud); 681 682 /* fixme: should set validated settings */ 683 tty_encode_baud_rate(tty, baud, baud); 684 685 /* handle any settings that aren't specified in the tty structure */ 686 port_settings.lloop = 0; 687 688 /* now send the message to the device */ 689 firm_send_command(port, WHITEHEAT_SETUP_PORT, 690 (__u8 *)&port_settings, sizeof(port_settings)); 691 } 692 693 694 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) 695 { 696 struct whiteheat_set_rdb rts_command; 697 698 rts_command.port = port->port_number + 1; 699 rts_command.state = onoff; 700 return firm_send_command(port, WHITEHEAT_SET_RTS, 701 (__u8 *)&rts_command, sizeof(rts_command)); 702 } 703 704 705 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) 706 { 707 struct whiteheat_set_rdb dtr_command; 708 709 dtr_command.port = port->port_number + 1; 710 dtr_command.state = onoff; 711 return firm_send_command(port, WHITEHEAT_SET_DTR, 712 (__u8 *)&dtr_command, sizeof(dtr_command)); 713 } 714 715 716 static int firm_set_break(struct usb_serial_port *port, __u8 onoff) 717 { 718 struct whiteheat_set_rdb break_command; 719 720 break_command.port = port->port_number + 1; 721 break_command.state = onoff; 722 return firm_send_command(port, WHITEHEAT_SET_BREAK, 723 (__u8 *)&break_command, sizeof(break_command)); 724 } 725 726 727 static int firm_purge(struct usb_serial_port *port, __u8 rxtx) 728 { 729 struct whiteheat_purge purge_command; 730 731 purge_command.port = port->port_number + 1; 732 purge_command.what = rxtx; 733 return firm_send_command(port, WHITEHEAT_PURGE, 734 (__u8 *)&purge_command, sizeof(purge_command)); 735 } 736 737 738 static int firm_get_dtr_rts(struct usb_serial_port *port) 739 { 740 struct whiteheat_simple get_dr_command; 741 742 get_dr_command.port = port->port_number + 1; 743 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, 744 (__u8 *)&get_dr_command, sizeof(get_dr_command)); 745 } 746 747 748 static int firm_report_tx_done(struct usb_serial_port *port) 749 { 750 struct whiteheat_simple close_command; 751 752 close_command.port = port->port_number + 1; 753 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, 754 (__u8 *)&close_command, sizeof(close_command)); 755 } 756 757 758 /***************************************************************************** 759 * Connect Tech's White Heat utility functions 760 *****************************************************************************/ 761 static int start_command_port(struct usb_serial *serial) 762 { 763 struct usb_serial_port *command_port; 764 struct whiteheat_command_private *command_info; 765 int retval = 0; 766 767 command_port = serial->port[COMMAND_PORT]; 768 command_info = usb_get_serial_port_data(command_port); 769 mutex_lock(&command_info->mutex); 770 if (!command_info->port_running) { 771 /* Work around HCD bugs */ 772 usb_clear_halt(serial->dev, command_port->read_urb->pipe); 773 774 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL); 775 if (retval) { 776 dev_err(&serial->dev->dev, 777 "%s - failed submitting read urb, error %d\n", 778 __func__, retval); 779 goto exit; 780 } 781 } 782 command_info->port_running++; 783 784 exit: 785 mutex_unlock(&command_info->mutex); 786 return retval; 787 } 788 789 790 static void stop_command_port(struct usb_serial *serial) 791 { 792 struct usb_serial_port *command_port; 793 struct whiteheat_command_private *command_info; 794 795 command_port = serial->port[COMMAND_PORT]; 796 command_info = usb_get_serial_port_data(command_port); 797 mutex_lock(&command_info->mutex); 798 command_info->port_running--; 799 if (!command_info->port_running) 800 usb_kill_urb(command_port->read_urb); 801 mutex_unlock(&command_info->mutex); 802 } 803 804 module_usb_serial_driver(serial_drivers, id_table_combined); 805 806 MODULE_AUTHOR(DRIVER_AUTHOR); 807 MODULE_DESCRIPTION(DRIVER_DESC); 808 MODULE_LICENSE("GPL"); 809 810 MODULE_FIRMWARE("whiteheat.fw"); 811 MODULE_FIRMWARE("whiteheat_loader.fw"); 812