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 int 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 int 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 #define CLOSING_DELAY (30 * HZ) 174 175 176 /***************************************************************************** 177 * Connect Tech's White Heat prerenumeration driver functions 178 *****************************************************************************/ 179 180 /* steps to download the firmware to the WhiteHEAT device: 181 - hold the reset (by writing to the reset bit of the CPUCS register) 182 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD 183 - release the reset (by writing to the CPUCS register) 184 - download the WH.HEX file for all addresses greater than 0x1b3f using 185 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD 186 - hold the reset 187 - download the WH.HEX file for all addresses less than 0x1b40 using 188 VENDOR_REQUEST_ANCHOR_LOAD 189 - release the reset 190 - device renumerated itself and comes up as new device id with all 191 firmware download completed. 192 */ 193 static int whiteheat_firmware_download(struct usb_serial *serial, 194 const struct usb_device_id *id) 195 { 196 int response; 197 198 response = ezusb_fx1_ihex_firmware_download(serial->dev, "whiteheat_loader.fw"); 199 if (response >= 0) { 200 response = ezusb_fx1_ihex_firmware_download(serial->dev, "whiteheat.fw"); 201 if (response >= 0) 202 return 0; 203 } 204 return -ENOENT; 205 } 206 207 208 static int whiteheat_firmware_attach(struct usb_serial *serial) 209 { 210 /* We want this device to fail to have a driver assigned to it */ 211 return 1; 212 } 213 214 215 /***************************************************************************** 216 * Connect Tech's White Heat serial driver functions 217 *****************************************************************************/ 218 219 static int whiteheat_attach(struct usb_serial *serial) 220 { 221 struct usb_serial_port *command_port; 222 struct whiteheat_command_private *command_info; 223 struct whiteheat_hw_info *hw_info; 224 int pipe; 225 int ret; 226 int alen; 227 __u8 *command; 228 __u8 *result; 229 230 command_port = serial->port[COMMAND_PORT]; 231 232 pipe = usb_sndbulkpipe(serial->dev, 233 command_port->bulk_out_endpointAddress); 234 command = kmalloc(2, GFP_KERNEL); 235 if (!command) 236 goto no_command_buffer; 237 command[0] = WHITEHEAT_GET_HW_INFO; 238 command[1] = 0; 239 240 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL); 241 if (!result) 242 goto no_result_buffer; 243 /* 244 * When the module is reloaded the firmware is still there and 245 * the endpoints are still in the usb core unchanged. This is the 246 * unlinking bug in disguise. Same for the call below. 247 */ 248 usb_clear_halt(serial->dev, pipe); 249 ret = usb_bulk_msg(serial->dev, pipe, command, 2, 250 &alen, COMMAND_TIMEOUT_MS); 251 if (ret) { 252 dev_err(&serial->dev->dev, "%s: Couldn't send command [%d]\n", 253 serial->type->description, ret); 254 goto no_firmware; 255 } else if (alen != 2) { 256 dev_err(&serial->dev->dev, "%s: Send command incomplete [%d]\n", 257 serial->type->description, alen); 258 goto no_firmware; 259 } 260 261 pipe = usb_rcvbulkpipe(serial->dev, 262 command_port->bulk_in_endpointAddress); 263 /* See the comment on the usb_clear_halt() above */ 264 usb_clear_halt(serial->dev, pipe); 265 ret = usb_bulk_msg(serial->dev, pipe, result, 266 sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS); 267 if (ret) { 268 dev_err(&serial->dev->dev, "%s: Couldn't get results [%d]\n", 269 serial->type->description, ret); 270 goto no_firmware; 271 } else if (alen != sizeof(*hw_info) + 1) { 272 dev_err(&serial->dev->dev, "%s: Get results incomplete [%d]\n", 273 serial->type->description, alen); 274 goto no_firmware; 275 } else if (result[0] != command[0]) { 276 dev_err(&serial->dev->dev, "%s: Command failed [%d]\n", 277 serial->type->description, result[0]); 278 goto no_firmware; 279 } 280 281 hw_info = (struct whiteheat_hw_info *)&result[1]; 282 283 dev_info(&serial->dev->dev, "%s: Firmware v%d.%02d\n", 284 serial->type->description, 285 hw_info->sw_major_rev, hw_info->sw_minor_rev); 286 287 command_info = kmalloc(sizeof(struct whiteheat_command_private), 288 GFP_KERNEL); 289 if (!command_info) 290 goto no_command_private; 291 292 mutex_init(&command_info->mutex); 293 command_info->port_running = 0; 294 init_waitqueue_head(&command_info->wait_command); 295 usb_set_serial_port_data(command_port, command_info); 296 command_port->write_urb->complete = command_port_write_callback; 297 command_port->read_urb->complete = command_port_read_callback; 298 kfree(result); 299 kfree(command); 300 301 return 0; 302 303 no_firmware: 304 /* Firmware likely not running */ 305 dev_err(&serial->dev->dev, 306 "%s: Unable to retrieve firmware version, try replugging\n", 307 serial->type->description); 308 dev_err(&serial->dev->dev, 309 "%s: If the firmware is not running (status led not blinking)\n", 310 serial->type->description); 311 dev_err(&serial->dev->dev, 312 "%s: please contact support@connecttech.com\n", 313 serial->type->description); 314 kfree(result); 315 kfree(command); 316 return -ENODEV; 317 318 no_command_private: 319 kfree(result); 320 no_result_buffer: 321 kfree(command); 322 no_command_buffer: 323 return -ENOMEM; 324 } 325 326 static void whiteheat_release(struct usb_serial *serial) 327 { 328 struct usb_serial_port *command_port; 329 330 /* free up our private data for our command port */ 331 command_port = serial->port[COMMAND_PORT]; 332 kfree(usb_get_serial_port_data(command_port)); 333 } 334 335 static int whiteheat_port_probe(struct usb_serial_port *port) 336 { 337 struct whiteheat_private *info; 338 339 info = kzalloc(sizeof(*info), GFP_KERNEL); 340 if (!info) 341 return -ENOMEM; 342 343 usb_set_serial_port_data(port, info); 344 345 return 0; 346 } 347 348 static int whiteheat_port_remove(struct usb_serial_port *port) 349 { 350 struct whiteheat_private *info; 351 352 info = usb_get_serial_port_data(port); 353 kfree(info); 354 355 return 0; 356 } 357 358 static int whiteheat_open(struct tty_struct *tty, struct usb_serial_port *port) 359 { 360 int retval; 361 362 retval = start_command_port(port->serial); 363 if (retval) 364 goto exit; 365 366 /* send an open port command */ 367 retval = firm_open(port); 368 if (retval) { 369 stop_command_port(port->serial); 370 goto exit; 371 } 372 373 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX); 374 if (retval) { 375 firm_close(port); 376 stop_command_port(port->serial); 377 goto exit; 378 } 379 380 if (tty) 381 firm_setup_port(tty); 382 383 /* Work around HCD bugs */ 384 usb_clear_halt(port->serial->dev, port->read_urb->pipe); 385 usb_clear_halt(port->serial->dev, port->write_urb->pipe); 386 387 retval = usb_serial_generic_open(tty, port); 388 if (retval) { 389 firm_close(port); 390 stop_command_port(port->serial); 391 goto exit; 392 } 393 exit: 394 return retval; 395 } 396 397 398 static void whiteheat_close(struct usb_serial_port *port) 399 { 400 firm_report_tx_done(port); 401 firm_close(port); 402 403 usb_serial_generic_close(port); 404 405 stop_command_port(port->serial); 406 } 407 408 static int whiteheat_tiocmget(struct tty_struct *tty) 409 { 410 struct usb_serial_port *port = tty->driver_data; 411 struct whiteheat_private *info = usb_get_serial_port_data(port); 412 unsigned int modem_signals = 0; 413 414 firm_get_dtr_rts(port); 415 if (info->mcr & UART_MCR_DTR) 416 modem_signals |= TIOCM_DTR; 417 if (info->mcr & UART_MCR_RTS) 418 modem_signals |= TIOCM_RTS; 419 420 return modem_signals; 421 } 422 423 static int whiteheat_tiocmset(struct tty_struct *tty, 424 unsigned int set, unsigned int clear) 425 { 426 struct usb_serial_port *port = tty->driver_data; 427 struct whiteheat_private *info = usb_get_serial_port_data(port); 428 429 if (set & TIOCM_RTS) 430 info->mcr |= UART_MCR_RTS; 431 if (set & TIOCM_DTR) 432 info->mcr |= UART_MCR_DTR; 433 434 if (clear & TIOCM_RTS) 435 info->mcr &= ~UART_MCR_RTS; 436 if (clear & TIOCM_DTR) 437 info->mcr &= ~UART_MCR_DTR; 438 439 firm_set_dtr(port, info->mcr & UART_MCR_DTR); 440 firm_set_rts(port, info->mcr & UART_MCR_RTS); 441 return 0; 442 } 443 444 445 static int whiteheat_get_serial(struct tty_struct *tty, 446 struct serial_struct *ss) 447 { 448 struct usb_serial_port *port = tty->driver_data; 449 450 ss->type = PORT_16654; 451 ss->line = port->minor; 452 ss->port = port->port_number; 453 ss->xmit_fifo_size = kfifo_size(&port->write_fifo); 454 ss->custom_divisor = 0; 455 ss->baud_base = 460800; 456 ss->close_delay = CLOSING_DELAY; 457 ss->closing_wait = CLOSING_DELAY; 458 459 return 0; 460 } 461 462 463 static void whiteheat_set_termios(struct tty_struct *tty, 464 struct usb_serial_port *port, struct ktermios *old_termios) 465 { 466 firm_setup_port(tty); 467 } 468 469 static void whiteheat_break_ctl(struct tty_struct *tty, int break_state) 470 { 471 struct usb_serial_port *port = tty->driver_data; 472 firm_set_break(port, break_state); 473 } 474 475 476 /***************************************************************************** 477 * Connect Tech's White Heat callback routines 478 *****************************************************************************/ 479 static void command_port_write_callback(struct urb *urb) 480 { 481 int status = urb->status; 482 483 if (status) { 484 dev_dbg(&urb->dev->dev, "nonzero urb status: %d\n", status); 485 return; 486 } 487 } 488 489 490 static void command_port_read_callback(struct urb *urb) 491 { 492 struct usb_serial_port *command_port = urb->context; 493 struct whiteheat_command_private *command_info; 494 int status = urb->status; 495 unsigned char *data = urb->transfer_buffer; 496 int result; 497 498 command_info = usb_get_serial_port_data(command_port); 499 if (!command_info) { 500 dev_dbg(&urb->dev->dev, "%s - command_info is NULL, exiting.\n", __func__); 501 return; 502 } 503 if (!urb->actual_length) { 504 dev_dbg(&urb->dev->dev, "%s - empty response, exiting.\n", __func__); 505 return; 506 } 507 if (status) { 508 dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n", __func__, status); 509 if (status != -ENOENT) 510 command_info->command_finished = WHITEHEAT_CMD_FAILURE; 511 wake_up(&command_info->wait_command); 512 return; 513 } 514 515 usb_serial_debug_data(&command_port->dev, __func__, urb->actual_length, data); 516 517 if (data[0] == WHITEHEAT_CMD_COMPLETE) { 518 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 519 wake_up(&command_info->wait_command); 520 } else if (data[0] == WHITEHEAT_CMD_FAILURE) { 521 command_info->command_finished = WHITEHEAT_CMD_FAILURE; 522 wake_up(&command_info->wait_command); 523 } else if (data[0] == WHITEHEAT_EVENT) { 524 /* These are unsolicited reports from the firmware, hence no 525 waiting command to wakeup */ 526 dev_dbg(&urb->dev->dev, "%s - event received\n", __func__); 527 } else if ((data[0] == WHITEHEAT_GET_DTR_RTS) && 528 (urb->actual_length - 1 <= sizeof(command_info->result_buffer))) { 529 memcpy(command_info->result_buffer, &data[1], 530 urb->actual_length - 1); 531 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 532 wake_up(&command_info->wait_command); 533 } else 534 dev_dbg(&urb->dev->dev, "%s - bad reply from firmware\n", __func__); 535 536 /* Continue trying to always read */ 537 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC); 538 if (result) 539 dev_dbg(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", 540 __func__, result); 541 } 542 543 544 /***************************************************************************** 545 * Connect Tech's White Heat firmware interface 546 *****************************************************************************/ 547 static int firm_send_command(struct usb_serial_port *port, __u8 command, 548 __u8 *data, __u8 datasize) 549 { 550 struct usb_serial_port *command_port; 551 struct whiteheat_command_private *command_info; 552 struct whiteheat_private *info; 553 struct device *dev = &port->dev; 554 __u8 *transfer_buffer; 555 int retval = 0; 556 int t; 557 558 dev_dbg(dev, "%s - command %d\n", __func__, command); 559 560 command_port = port->serial->port[COMMAND_PORT]; 561 command_info = usb_get_serial_port_data(command_port); 562 563 if (command_port->bulk_out_size < datasize + 1) 564 return -EIO; 565 566 mutex_lock(&command_info->mutex); 567 command_info->command_finished = false; 568 569 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer; 570 transfer_buffer[0] = command; 571 memcpy(&transfer_buffer[1], data, datasize); 572 command_port->write_urb->transfer_buffer_length = datasize + 1; 573 retval = usb_submit_urb(command_port->write_urb, GFP_NOIO); 574 if (retval) { 575 dev_dbg(dev, "%s - submit urb failed\n", __func__); 576 goto exit; 577 } 578 579 /* wait for the command to complete */ 580 t = wait_event_timeout(command_info->wait_command, 581 (bool)command_info->command_finished, COMMAND_TIMEOUT); 582 if (!t) 583 usb_kill_urb(command_port->write_urb); 584 585 if (command_info->command_finished == false) { 586 dev_dbg(dev, "%s - command timed out.\n", __func__); 587 retval = -ETIMEDOUT; 588 goto exit; 589 } 590 591 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) { 592 dev_dbg(dev, "%s - command failed.\n", __func__); 593 retval = -EIO; 594 goto exit; 595 } 596 597 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) { 598 dev_dbg(dev, "%s - command completed.\n", __func__); 599 switch (command) { 600 case WHITEHEAT_GET_DTR_RTS: 601 info = usb_get_serial_port_data(port); 602 memcpy(&info->mcr, command_info->result_buffer, 603 sizeof(struct whiteheat_dr_info)); 604 break; 605 } 606 } 607 exit: 608 mutex_unlock(&command_info->mutex); 609 return retval; 610 } 611 612 613 static int firm_open(struct usb_serial_port *port) 614 { 615 struct whiteheat_simple open_command; 616 617 open_command.port = port->port_number + 1; 618 return firm_send_command(port, WHITEHEAT_OPEN, 619 (__u8 *)&open_command, sizeof(open_command)); 620 } 621 622 623 static int firm_close(struct usb_serial_port *port) 624 { 625 struct whiteheat_simple close_command; 626 627 close_command.port = port->port_number + 1; 628 return firm_send_command(port, WHITEHEAT_CLOSE, 629 (__u8 *)&close_command, sizeof(close_command)); 630 } 631 632 633 static void firm_setup_port(struct tty_struct *tty) 634 { 635 struct usb_serial_port *port = tty->driver_data; 636 struct device *dev = &port->dev; 637 struct whiteheat_port_settings port_settings; 638 unsigned int cflag = tty->termios.c_cflag; 639 speed_t baud; 640 641 port_settings.port = port->port_number + 1; 642 643 /* get the byte size */ 644 switch (cflag & CSIZE) { 645 case CS5: port_settings.bits = 5; break; 646 case CS6: port_settings.bits = 6; break; 647 case CS7: port_settings.bits = 7; break; 648 default: 649 case CS8: port_settings.bits = 8; break; 650 } 651 dev_dbg(dev, "%s - data bits = %d\n", __func__, port_settings.bits); 652 653 /* determine the parity */ 654 if (cflag & PARENB) 655 if (cflag & CMSPAR) 656 if (cflag & PARODD) 657 port_settings.parity = WHITEHEAT_PAR_MARK; 658 else 659 port_settings.parity = WHITEHEAT_PAR_SPACE; 660 else 661 if (cflag & PARODD) 662 port_settings.parity = WHITEHEAT_PAR_ODD; 663 else 664 port_settings.parity = WHITEHEAT_PAR_EVEN; 665 else 666 port_settings.parity = WHITEHEAT_PAR_NONE; 667 dev_dbg(dev, "%s - parity = %c\n", __func__, port_settings.parity); 668 669 /* figure out the stop bits requested */ 670 if (cflag & CSTOPB) 671 port_settings.stop = 2; 672 else 673 port_settings.stop = 1; 674 dev_dbg(dev, "%s - stop bits = %d\n", __func__, port_settings.stop); 675 676 /* figure out the flow control settings */ 677 if (cflag & CRTSCTS) 678 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | 679 WHITEHEAT_HFLOW_RTS); 680 else 681 port_settings.hflow = WHITEHEAT_HFLOW_NONE; 682 dev_dbg(dev, "%s - hardware flow control = %s %s %s %s\n", __func__, 683 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "", 684 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "", 685 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "", 686 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : ""); 687 688 /* determine software flow control */ 689 if (I_IXOFF(tty)) 690 port_settings.sflow = WHITEHEAT_SFLOW_RXTX; 691 else 692 port_settings.sflow = WHITEHEAT_SFLOW_NONE; 693 dev_dbg(dev, "%s - software flow control = %c\n", __func__, port_settings.sflow); 694 695 port_settings.xon = START_CHAR(tty); 696 port_settings.xoff = STOP_CHAR(tty); 697 dev_dbg(dev, "%s - XON = %2x, XOFF = %2x\n", __func__, port_settings.xon, port_settings.xoff); 698 699 /* get the baud rate wanted */ 700 baud = tty_get_baud_rate(tty); 701 port_settings.baud = cpu_to_le32(baud); 702 dev_dbg(dev, "%s - baud rate = %u\n", __func__, baud); 703 704 /* fixme: should set validated settings */ 705 tty_encode_baud_rate(tty, baud, baud); 706 707 /* handle any settings that aren't specified in the tty structure */ 708 port_settings.lloop = 0; 709 710 /* now send the message to the device */ 711 firm_send_command(port, WHITEHEAT_SETUP_PORT, 712 (__u8 *)&port_settings, sizeof(port_settings)); 713 } 714 715 716 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) 717 { 718 struct whiteheat_set_rdb rts_command; 719 720 rts_command.port = port->port_number + 1; 721 rts_command.state = onoff; 722 return firm_send_command(port, WHITEHEAT_SET_RTS, 723 (__u8 *)&rts_command, sizeof(rts_command)); 724 } 725 726 727 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) 728 { 729 struct whiteheat_set_rdb dtr_command; 730 731 dtr_command.port = port->port_number + 1; 732 dtr_command.state = onoff; 733 return firm_send_command(port, WHITEHEAT_SET_DTR, 734 (__u8 *)&dtr_command, sizeof(dtr_command)); 735 } 736 737 738 static int firm_set_break(struct usb_serial_port *port, __u8 onoff) 739 { 740 struct whiteheat_set_rdb break_command; 741 742 break_command.port = port->port_number + 1; 743 break_command.state = onoff; 744 return firm_send_command(port, WHITEHEAT_SET_BREAK, 745 (__u8 *)&break_command, sizeof(break_command)); 746 } 747 748 749 static int firm_purge(struct usb_serial_port *port, __u8 rxtx) 750 { 751 struct whiteheat_purge purge_command; 752 753 purge_command.port = port->port_number + 1; 754 purge_command.what = rxtx; 755 return firm_send_command(port, WHITEHEAT_PURGE, 756 (__u8 *)&purge_command, sizeof(purge_command)); 757 } 758 759 760 static int firm_get_dtr_rts(struct usb_serial_port *port) 761 { 762 struct whiteheat_simple get_dr_command; 763 764 get_dr_command.port = port->port_number + 1; 765 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, 766 (__u8 *)&get_dr_command, sizeof(get_dr_command)); 767 } 768 769 770 static int firm_report_tx_done(struct usb_serial_port *port) 771 { 772 struct whiteheat_simple close_command; 773 774 close_command.port = port->port_number + 1; 775 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, 776 (__u8 *)&close_command, sizeof(close_command)); 777 } 778 779 780 /***************************************************************************** 781 * Connect Tech's White Heat utility functions 782 *****************************************************************************/ 783 static int start_command_port(struct usb_serial *serial) 784 { 785 struct usb_serial_port *command_port; 786 struct whiteheat_command_private *command_info; 787 int retval = 0; 788 789 command_port = serial->port[COMMAND_PORT]; 790 command_info = usb_get_serial_port_data(command_port); 791 mutex_lock(&command_info->mutex); 792 if (!command_info->port_running) { 793 /* Work around HCD bugs */ 794 usb_clear_halt(serial->dev, command_port->read_urb->pipe); 795 796 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL); 797 if (retval) { 798 dev_err(&serial->dev->dev, 799 "%s - failed submitting read urb, error %d\n", 800 __func__, retval); 801 goto exit; 802 } 803 } 804 command_info->port_running++; 805 806 exit: 807 mutex_unlock(&command_info->mutex); 808 return retval; 809 } 810 811 812 static void stop_command_port(struct usb_serial *serial) 813 { 814 struct usb_serial_port *command_port; 815 struct whiteheat_command_private *command_info; 816 817 command_port = serial->port[COMMAND_PORT]; 818 command_info = usb_get_serial_port_data(command_port); 819 mutex_lock(&command_info->mutex); 820 command_info->port_running--; 821 if (!command_info->port_running) 822 usb_kill_urb(command_port->read_urb); 823 mutex_unlock(&command_info->mutex); 824 } 825 826 module_usb_serial_driver(serial_drivers, id_table_combined); 827 828 MODULE_AUTHOR(DRIVER_AUTHOR); 829 MODULE_DESCRIPTION(DRIVER_DESC); 830 MODULE_LICENSE("GPL"); 831 832 MODULE_FIRMWARE("whiteheat.fw"); 833 MODULE_FIRMWARE("whiteheat_loader.fw"); 834