1/* 2 * USB ConnectTech WhiteHEAT driver 3 * 4 * Copyright (C) 2002 5 * Connect Tech Inc. 6 * 7 * Copyright (C) 1999 - 2001 8 * Greg Kroah-Hartman (greg@kroah.com) 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * See Documentation/usb/usb-serial.txt for more information on using this 16 * driver 17 * 18 * (10/09/2002) Stuart MacDonald (stuartm@connecttech.com) 19 * Upgrade to full working driver 20 * 21 * (05/30/2001) gkh 22 * switched from using spinlock to a semaphore, which fixes lots of 23 * problems. 24 * 25 * (04/08/2001) gb 26 * Identify version on module load. 27 * 28 * 2001_Mar_19 gkh 29 * Fixed MOD_INC and MOD_DEC logic, the ability to open a port more 30 * than once, and the got the proper usb_device_id table entries so 31 * the driver works again. 32 * 33 * (11/01/2000) Adam J. Richter 34 * usb_device_id table support 35 * 36 * (10/05/2000) gkh 37 * Fixed bug with urb->dev not being set properly, now that the usb 38 * core needs it. 39 * 40 * (10/03/2000) smd 41 * firmware is improved to guard against crap sent to device 42 * firmware now replies CMD_FAILURE on bad things 43 * read_callback fix you provided for private info struct 44 * command_finished now indicates success or fail 45 * setup_port struct now packed to avoid gcc padding 46 * firmware uses 1 based port numbering, driver now handles that 47 * 48 * (09/11/2000) gkh 49 * Removed DEBUG #ifdefs with call to usb_serial_debug_data 50 * 51 * (07/19/2000) gkh 52 * Added module_init and module_exit functions to handle the fact that this 53 * driver is a loadable module now. 54 * Fixed bug with port->minor that was found by Al Borchers 55 * 56 * (07/04/2000) gkh 57 * Added support for port settings. Baud rate can now be changed. Line 58 * signals are not transferred to and from the tty layer yet, but things 59 * seem to be working well now. 60 * 61 * (05/04/2000) gkh 62 * First cut at open and close commands. Data can flow through the ports at 63 * default speeds now. 64 * 65 * (03/26/2000) gkh 66 * Split driver up into device specific pieces. 67 * 68 */ 69 70#include <linux/kernel.h> 71#include <linux/errno.h> 72#include <linux/init.h> 73#include <linux/slab.h> 74#include <linux/tty.h> 75#include <linux/tty_driver.h> 76#include <linux/tty_flip.h> 77#include <linux/module.h> 78#include <linux/spinlock.h> 79#include <linux/mutex.h> 80#include <linux/uaccess.h> 81#include <asm/termbits.h> 82#include <linux/usb.h> 83#include <linux/serial_reg.h> 84#include <linux/serial.h> 85#include <linux/usb/serial.h> 86#include <linux/firmware.h> 87#include <linux/ihex.h> 88#include "whiteheat.h" /* WhiteHEAT specific commands */ 89 90static int debug; 91 92#ifndef CMSPAR 93#define CMSPAR 0 94#endif 95 96/* 97 * Version Information 98 */ 99#define DRIVER_VERSION "v2.0" 100#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>" 101#define DRIVER_DESC "USB ConnectTech WhiteHEAT driver" 102 103#define CONNECT_TECH_VENDOR_ID 0x0710 104#define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001 105#define CONNECT_TECH_WHITE_HEAT_ID 0x8001 106 107/* 108 ID tables for whiteheat are unusual, because we want to different 109 things for different versions of the device. Eventually, this 110 will be doable from a single table. But, for now, we define two 111 separate ID tables, and then a third table that combines them 112 just for the purpose of exporting the autoloading information. 113*/ 114static const struct usb_device_id id_table_std[] = { 115 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) }, 116 { } /* Terminating entry */ 117}; 118 119static const struct usb_device_id id_table_prerenumeration[] = { 120 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) }, 121 { } /* Terminating entry */ 122}; 123 124static const struct usb_device_id id_table_combined[] = { 125 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) }, 126 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) }, 127 { } /* Terminating entry */ 128}; 129 130MODULE_DEVICE_TABLE(usb, id_table_combined); 131 132static struct usb_driver whiteheat_driver = { 133 .name = "whiteheat", 134 .probe = usb_serial_probe, 135 .disconnect = usb_serial_disconnect, 136 .id_table = id_table_combined, 137 .no_dynamic_id = 1, 138}; 139 140/* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */ 141static int whiteheat_firmware_download(struct usb_serial *serial, 142 const struct usb_device_id *id); 143static int whiteheat_firmware_attach(struct usb_serial *serial); 144 145/* function prototypes for the Connect Tech WhiteHEAT serial converter */ 146static int whiteheat_attach(struct usb_serial *serial); 147static void whiteheat_release(struct usb_serial *serial); 148static int whiteheat_open(struct tty_struct *tty, 149 struct usb_serial_port *port); 150static void whiteheat_close(struct usb_serial_port *port); 151static int whiteheat_write(struct tty_struct *tty, 152 struct usb_serial_port *port, 153 const unsigned char *buf, int count); 154static int whiteheat_write_room(struct tty_struct *tty); 155static int whiteheat_ioctl(struct tty_struct *tty, struct file *file, 156 unsigned int cmd, unsigned long arg); 157static void whiteheat_set_termios(struct tty_struct *tty, 158 struct usb_serial_port *port, struct ktermios *old); 159static int whiteheat_tiocmget(struct tty_struct *tty, struct file *file); 160static int whiteheat_tiocmset(struct tty_struct *tty, struct file *file, 161 unsigned int set, unsigned int clear); 162static void whiteheat_break_ctl(struct tty_struct *tty, int break_state); 163static int whiteheat_chars_in_buffer(struct tty_struct *tty); 164static void whiteheat_throttle(struct tty_struct *tty); 165static void whiteheat_unthrottle(struct tty_struct *tty); 166static void whiteheat_read_callback(struct urb *urb); 167static void whiteheat_write_callback(struct urb *urb); 168 169static struct usb_serial_driver whiteheat_fake_device = { 170 .driver = { 171 .owner = THIS_MODULE, 172 .name = "whiteheatnofirm", 173 }, 174 .description = "Connect Tech - WhiteHEAT - (prerenumeration)", 175 .usb_driver = &whiteheat_driver, 176 .id_table = id_table_prerenumeration, 177 .num_ports = 1, 178 .probe = whiteheat_firmware_download, 179 .attach = whiteheat_firmware_attach, 180}; 181 182static struct usb_serial_driver whiteheat_device = { 183 .driver = { 184 .owner = THIS_MODULE, 185 .name = "whiteheat", 186 }, 187 .description = "Connect Tech - WhiteHEAT", 188 .usb_driver = &whiteheat_driver, 189 .id_table = id_table_std, 190 .num_ports = 4, 191 .attach = whiteheat_attach, 192 .release = whiteheat_release, 193 .open = whiteheat_open, 194 .close = whiteheat_close, 195 .write = whiteheat_write, 196 .write_room = whiteheat_write_room, 197 .ioctl = whiteheat_ioctl, 198 .set_termios = whiteheat_set_termios, 199 .break_ctl = whiteheat_break_ctl, 200 .tiocmget = whiteheat_tiocmget, 201 .tiocmset = whiteheat_tiocmset, 202 .chars_in_buffer = whiteheat_chars_in_buffer, 203 .throttle = whiteheat_throttle, 204 .unthrottle = whiteheat_unthrottle, 205 .read_bulk_callback = whiteheat_read_callback, 206 .write_bulk_callback = whiteheat_write_callback, 207}; 208 209 210struct whiteheat_command_private { 211 struct mutex mutex; 212 __u8 port_running; 213 __u8 command_finished; 214 wait_queue_head_t wait_command; /* for handling sleeping whilst 215 waiting for a command to 216 finish */ 217 __u8 result_buffer[64]; 218}; 219 220 221#define THROTTLED 0x01 222#define ACTUALLY_THROTTLED 0x02 223 224static int urb_pool_size = 8; 225 226struct whiteheat_urb_wrap { 227 struct list_head list; 228 struct urb *urb; 229}; 230 231struct whiteheat_private { 232 spinlock_t lock; 233 __u8 flags; 234 __u8 mcr; 235 struct list_head rx_urbs_free; 236 struct list_head rx_urbs_submitted; 237 struct list_head rx_urb_q; 238 struct work_struct rx_work; 239 struct usb_serial_port *port; 240 struct list_head tx_urbs_free; 241 struct list_head tx_urbs_submitted; 242 struct mutex deathwarrant; 243}; 244 245 246/* local function prototypes */ 247static int start_command_port(struct usb_serial *serial); 248static void stop_command_port(struct usb_serial *serial); 249static void command_port_write_callback(struct urb *urb); 250static void command_port_read_callback(struct urb *urb); 251 252static int start_port_read(struct usb_serial_port *port); 253static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, 254 struct list_head *head); 255static struct list_head *list_first(struct list_head *head); 256static void rx_data_softint(struct work_struct *work); 257 258static int firm_send_command(struct usb_serial_port *port, __u8 command, 259 __u8 *data, __u8 datasize); 260static int firm_open(struct usb_serial_port *port); 261static int firm_close(struct usb_serial_port *port); 262static void firm_setup_port(struct tty_struct *tty); 263static int firm_set_rts(struct usb_serial_port *port, __u8 onoff); 264static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff); 265static int firm_set_break(struct usb_serial_port *port, __u8 onoff); 266static int firm_purge(struct usb_serial_port *port, __u8 rxtx); 267static int firm_get_dtr_rts(struct usb_serial_port *port); 268static int firm_report_tx_done(struct usb_serial_port *port); 269 270 271#define COMMAND_PORT 4 272#define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */ 273#define COMMAND_TIMEOUT_MS 2000 274#define CLOSING_DELAY (30 * HZ) 275 276 277/***************************************************************************** 278 * Connect Tech's White Heat prerenumeration driver functions 279 *****************************************************************************/ 280 281/* steps to download the firmware to the WhiteHEAT device: 282 - hold the reset (by writing to the reset bit of the CPUCS register) 283 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD 284 - release the reset (by writing to the CPUCS register) 285 - download the WH.HEX file for all addresses greater than 0x1b3f using 286 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD 287 - hold the reset 288 - download the WH.HEX file for all addresses less than 0x1b40 using 289 VENDOR_REQUEST_ANCHOR_LOAD 290 - release the reset 291 - device renumerated itself and comes up as new device id with all 292 firmware download completed. 293*/ 294static int whiteheat_firmware_download(struct usb_serial *serial, 295 const struct usb_device_id *id) 296{ 297 int response, ret = -ENOENT; 298 const struct firmware *loader_fw = NULL, *firmware_fw = NULL; 299 const struct ihex_binrec *record; 300 301 dbg("%s", __func__); 302 303 if (request_ihex_firmware(&firmware_fw, "whiteheat.fw", 304 &serial->dev->dev)) { 305 dev_err(&serial->dev->dev, 306 "%s - request \"whiteheat.fw\" failed\n", __func__); 307 goto out; 308 } 309 if (request_ihex_firmware(&loader_fw, "whiteheat_loader.fw", 310 &serial->dev->dev)) { 311 dev_err(&serial->dev->dev, 312 "%s - request \"whiteheat_loader.fw\" failed\n", 313 __func__); 314 goto out; 315 } 316 ret = 0; 317 response = ezusb_set_reset (serial, 1); 318 319 record = (const struct ihex_binrec *)loader_fw->data; 320 while (record) { 321 response = ezusb_writememory (serial, be32_to_cpu(record->addr), 322 (unsigned char *)record->data, 323 be16_to_cpu(record->len), 0xa0); 324 if (response < 0) { 325 dev_err(&serial->dev->dev, "%s - ezusb_writememory " 326 "failed for loader (%d %04X %p %d)\n", 327 __func__, response, be32_to_cpu(record->addr), 328 record->data, be16_to_cpu(record->len)); 329 break; 330 } 331 record = ihex_next_binrec(record); 332 } 333 334 response = ezusb_set_reset(serial, 0); 335 336 record = (const struct ihex_binrec *)firmware_fw->data; 337 while (record && be32_to_cpu(record->addr) < 0x1b40) 338 record = ihex_next_binrec(record); 339 while (record) { 340 response = ezusb_writememory (serial, be32_to_cpu(record->addr), 341 (unsigned char *)record->data, 342 be16_to_cpu(record->len), 0xa3); 343 if (response < 0) { 344 dev_err(&serial->dev->dev, "%s - ezusb_writememory " 345 "failed for first firmware step " 346 "(%d %04X %p %d)\n", __func__, response, 347 be32_to_cpu(record->addr), record->data, 348 be16_to_cpu(record->len)); 349 break; 350 } 351 ++record; 352 } 353 354 response = ezusb_set_reset(serial, 1); 355 356 record = (const struct ihex_binrec *)firmware_fw->data; 357 while (record && be32_to_cpu(record->addr) < 0x1b40) { 358 response = ezusb_writememory (serial, be32_to_cpu(record->addr), 359 (unsigned char *)record->data, 360 be16_to_cpu(record->len), 0xa0); 361 if (response < 0) { 362 dev_err(&serial->dev->dev, "%s - ezusb_writememory " 363 "failed for second firmware step " 364 "(%d %04X %p %d)\n", __func__, response, 365 be32_to_cpu(record->addr), record->data, 366 be16_to_cpu(record->len)); 367 break; 368 } 369 ++record; 370 } 371 ret = 0; 372 response = ezusb_set_reset (serial, 0); 373 out: 374 release_firmware(loader_fw); 375 release_firmware(firmware_fw); 376 return ret; 377} 378 379 380static int whiteheat_firmware_attach(struct usb_serial *serial) 381{ 382 /* We want this device to fail to have a driver assigned to it */ 383 return 1; 384} 385 386 387/***************************************************************************** 388 * Connect Tech's White Heat serial driver functions 389 *****************************************************************************/ 390static int whiteheat_attach(struct usb_serial *serial) 391{ 392 struct usb_serial_port *command_port; 393 struct whiteheat_command_private *command_info; 394 struct usb_serial_port *port; 395 struct whiteheat_private *info; 396 struct whiteheat_hw_info *hw_info; 397 int pipe; 398 int ret; 399 int alen; 400 __u8 *command; 401 __u8 *result; 402 int i; 403 int j; 404 struct urb *urb; 405 int buf_size; 406 struct whiteheat_urb_wrap *wrap; 407 struct list_head *tmp; 408 409 command_port = serial->port[COMMAND_PORT]; 410 411 pipe = usb_sndbulkpipe(serial->dev, 412 command_port->bulk_out_endpointAddress); 413 command = kmalloc(2, GFP_KERNEL); 414 if (!command) 415 goto no_command_buffer; 416 command[0] = WHITEHEAT_GET_HW_INFO; 417 command[1] = 0; 418 419 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL); 420 if (!result) 421 goto no_result_buffer; 422 /* 423 * When the module is reloaded the firmware is still there and 424 * the endpoints are still in the usb core unchanged. This is the 425 * unlinking bug in disguise. Same for the call below. 426 */ 427 usb_clear_halt(serial->dev, pipe); 428 ret = usb_bulk_msg(serial->dev, pipe, command, 2, 429 &alen, COMMAND_TIMEOUT_MS); 430 if (ret) { 431 dev_err(&serial->dev->dev, "%s: Couldn't send command [%d]\n", 432 serial->type->description, ret); 433 goto no_firmware; 434 } else if (alen != 2) { 435 dev_err(&serial->dev->dev, "%s: Send command incomplete [%d]\n", 436 serial->type->description, alen); 437 goto no_firmware; 438 } 439 440 pipe = usb_rcvbulkpipe(serial->dev, 441 command_port->bulk_in_endpointAddress); 442 /* See the comment on the usb_clear_halt() above */ 443 usb_clear_halt(serial->dev, pipe); 444 ret = usb_bulk_msg(serial->dev, pipe, result, 445 sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS); 446 if (ret) { 447 dev_err(&serial->dev->dev, "%s: Couldn't get results [%d]\n", 448 serial->type->description, ret); 449 goto no_firmware; 450 } else if (alen != sizeof(*hw_info) + 1) { 451 dev_err(&serial->dev->dev, "%s: Get results incomplete [%d]\n", 452 serial->type->description, alen); 453 goto no_firmware; 454 } else if (result[0] != command[0]) { 455 dev_err(&serial->dev->dev, "%s: Command failed [%d]\n", 456 serial->type->description, result[0]); 457 goto no_firmware; 458 } 459 460 hw_info = (struct whiteheat_hw_info *)&result[1]; 461 462 dev_info(&serial->dev->dev, "%s: Driver %s: Firmware v%d.%02d\n", 463 serial->type->description, DRIVER_VERSION, 464 hw_info->sw_major_rev, hw_info->sw_minor_rev); 465 466 for (i = 0; i < serial->num_ports; i++) { 467 port = serial->port[i]; 468 469 info = kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL); 470 if (info == NULL) { 471 dev_err(&port->dev, 472 "%s: Out of memory for port structures\n", 473 serial->type->description); 474 goto no_private; 475 } 476 477 spin_lock_init(&info->lock); 478 mutex_init(&info->deathwarrant); 479 info->flags = 0; 480 info->mcr = 0; 481 INIT_WORK(&info->rx_work, rx_data_softint); 482 info->port = port; 483 484 INIT_LIST_HEAD(&info->rx_urbs_free); 485 INIT_LIST_HEAD(&info->rx_urbs_submitted); 486 INIT_LIST_HEAD(&info->rx_urb_q); 487 INIT_LIST_HEAD(&info->tx_urbs_free); 488 INIT_LIST_HEAD(&info->tx_urbs_submitted); 489 490 for (j = 0; j < urb_pool_size; j++) { 491 urb = usb_alloc_urb(0, GFP_KERNEL); 492 if (!urb) { 493 dev_err(&port->dev, "No free urbs available\n"); 494 goto no_rx_urb; 495 } 496 buf_size = port->read_urb->transfer_buffer_length; 497 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 498 if (!urb->transfer_buffer) { 499 dev_err(&port->dev, 500 "Couldn't allocate urb buffer\n"); 501 goto no_rx_buf; 502 } 503 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 504 if (!wrap) { 505 dev_err(&port->dev, 506 "Couldn't allocate urb wrapper\n"); 507 goto no_rx_wrap; 508 } 509 usb_fill_bulk_urb(urb, serial->dev, 510 usb_rcvbulkpipe(serial->dev, 511 port->bulk_in_endpointAddress), 512 urb->transfer_buffer, buf_size, 513 whiteheat_read_callback, port); 514 wrap->urb = urb; 515 list_add(&wrap->list, &info->rx_urbs_free); 516 517 urb = usb_alloc_urb(0, GFP_KERNEL); 518 if (!urb) { 519 dev_err(&port->dev, "No free urbs available\n"); 520 goto no_tx_urb; 521 } 522 buf_size = port->write_urb->transfer_buffer_length; 523 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 524 if (!urb->transfer_buffer) { 525 dev_err(&port->dev, 526 "Couldn't allocate urb buffer\n"); 527 goto no_tx_buf; 528 } 529 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 530 if (!wrap) { 531 dev_err(&port->dev, 532 "Couldn't allocate urb wrapper\n"); 533 goto no_tx_wrap; 534 } 535 usb_fill_bulk_urb(urb, serial->dev, 536 usb_sndbulkpipe(serial->dev, 537 port->bulk_out_endpointAddress), 538 urb->transfer_buffer, buf_size, 539 whiteheat_write_callback, port); 540 wrap->urb = urb; 541 list_add(&wrap->list, &info->tx_urbs_free); 542 } 543 544 usb_set_serial_port_data(port, info); 545 } 546 547 command_info = kmalloc(sizeof(struct whiteheat_command_private), 548 GFP_KERNEL); 549 if (command_info == NULL) { 550 dev_err(&serial->dev->dev, 551 "%s: Out of memory for port structures\n", 552 serial->type->description); 553 goto no_command_private; 554 } 555 556 mutex_init(&command_info->mutex); 557 command_info->port_running = 0; 558 init_waitqueue_head(&command_info->wait_command); 559 usb_set_serial_port_data(command_port, command_info); 560 command_port->write_urb->complete = command_port_write_callback; 561 command_port->read_urb->complete = command_port_read_callback; 562 kfree(result); 563 kfree(command); 564 565 return 0; 566 567no_firmware: 568 /* Firmware likely not running */ 569 dev_err(&serial->dev->dev, 570 "%s: Unable to retrieve firmware version, try replugging\n", 571 serial->type->description); 572 dev_err(&serial->dev->dev, 573 "%s: If the firmware is not running (status led not blinking)\n", 574 serial->type->description); 575 dev_err(&serial->dev->dev, 576 "%s: please contact support@connecttech.com\n", 577 serial->type->description); 578 kfree(result); 579 return -ENODEV; 580 581no_command_private: 582 for (i = serial->num_ports - 1; i >= 0; i--) { 583 port = serial->port[i]; 584 info = usb_get_serial_port_data(port); 585 for (j = urb_pool_size - 1; j >= 0; j--) { 586 tmp = list_first(&info->tx_urbs_free); 587 list_del(tmp); 588 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 589 urb = wrap->urb; 590 kfree(wrap); 591no_tx_wrap: 592 kfree(urb->transfer_buffer); 593no_tx_buf: 594 usb_free_urb(urb); 595no_tx_urb: 596 tmp = list_first(&info->rx_urbs_free); 597 list_del(tmp); 598 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 599 urb = wrap->urb; 600 kfree(wrap); 601no_rx_wrap: 602 kfree(urb->transfer_buffer); 603no_rx_buf: 604 usb_free_urb(urb); 605no_rx_urb: 606 ; 607 } 608 kfree(info); 609no_private: 610 ; 611 } 612 kfree(result); 613no_result_buffer: 614 kfree(command); 615no_command_buffer: 616 return -ENOMEM; 617} 618 619 620static void whiteheat_release(struct usb_serial *serial) 621{ 622 struct usb_serial_port *command_port; 623 struct usb_serial_port *port; 624 struct whiteheat_private *info; 625 struct whiteheat_urb_wrap *wrap; 626 struct urb *urb; 627 struct list_head *tmp; 628 struct list_head *tmp2; 629 int i; 630 631 dbg("%s", __func__); 632 633 /* free up our private data for our command port */ 634 command_port = serial->port[COMMAND_PORT]; 635 kfree(usb_get_serial_port_data(command_port)); 636 637 for (i = 0; i < serial->num_ports; i++) { 638 port = serial->port[i]; 639 info = usb_get_serial_port_data(port); 640 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 641 list_del(tmp); 642 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 643 urb = wrap->urb; 644 kfree(wrap); 645 kfree(urb->transfer_buffer); 646 usb_free_urb(urb); 647 } 648 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) { 649 list_del(tmp); 650 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 651 urb = wrap->urb; 652 kfree(wrap); 653 kfree(urb->transfer_buffer); 654 usb_free_urb(urb); 655 } 656 kfree(info); 657 } 658 659 return; 660} 661 662static int whiteheat_open(struct tty_struct *tty, struct usb_serial_port *port) 663{ 664 int retval = 0; 665 666 dbg("%s - port %d", __func__, port->number); 667 668 retval = start_command_port(port->serial); 669 if (retval) 670 goto exit; 671 672 if (tty) 673 tty->low_latency = 1; 674 675 /* send an open port command */ 676 retval = firm_open(port); 677 if (retval) { 678 stop_command_port(port->serial); 679 goto exit; 680 } 681 682 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX); 683 if (retval) { 684 firm_close(port); 685 stop_command_port(port->serial); 686 goto exit; 687 } 688 689 if (tty) 690 firm_setup_port(tty); 691 692 usb_clear_halt(port->serial->dev, port->read_urb->pipe); 693 usb_clear_halt(port->serial->dev, port->write_urb->pipe); 694 695 /* Start reading from the device */ 696 retval = start_port_read(port); 697 if (retval) { 698 dev_err(&port->dev, 699 "%s - failed submitting read urb, error %d\n", 700 __func__, retval); 701 firm_close(port); 702 stop_command_port(port->serial); 703 goto exit; 704 } 705 706exit: 707 dbg("%s - exit, retval = %d", __func__, retval); 708 return retval; 709} 710 711 712static void whiteheat_close(struct usb_serial_port *port) 713{ 714 struct whiteheat_private *info = usb_get_serial_port_data(port); 715 struct whiteheat_urb_wrap *wrap; 716 struct urb *urb; 717 struct list_head *tmp; 718 struct list_head *tmp2; 719 720 dbg("%s - port %d", __func__, port->number); 721 722 firm_report_tx_done(port); 723 firm_close(port); 724 725 /* shutdown our bulk reads and writes */ 726 mutex_lock(&info->deathwarrant); 727 spin_lock_irq(&info->lock); 728 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 729 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 730 urb = wrap->urb; 731 list_del(tmp); 732 spin_unlock_irq(&info->lock); 733 usb_kill_urb(urb); 734 spin_lock_irq(&info->lock); 735 list_add(tmp, &info->rx_urbs_free); 736 } 737 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) 738 list_move(tmp, &info->rx_urbs_free); 739 list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) { 740 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 741 urb = wrap->urb; 742 list_del(tmp); 743 spin_unlock_irq(&info->lock); 744 usb_kill_urb(urb); 745 spin_lock_irq(&info->lock); 746 list_add(tmp, &info->tx_urbs_free); 747 } 748 spin_unlock_irq(&info->lock); 749 mutex_unlock(&info->deathwarrant); 750 stop_command_port(port->serial); 751} 752 753 754static int whiteheat_write(struct tty_struct *tty, 755 struct usb_serial_port *port, const unsigned char *buf, int count) 756{ 757 struct usb_serial *serial = port->serial; 758 struct whiteheat_private *info = usb_get_serial_port_data(port); 759 struct whiteheat_urb_wrap *wrap; 760 struct urb *urb; 761 int result; 762 int bytes; 763 int sent = 0; 764 unsigned long flags; 765 struct list_head *tmp; 766 767 dbg("%s - port %d", __func__, port->number); 768 769 if (count == 0) { 770 dbg("%s - write request of 0 bytes", __func__); 771 return (0); 772 } 773 774 while (count) { 775 spin_lock_irqsave(&info->lock, flags); 776 if (list_empty(&info->tx_urbs_free)) { 777 spin_unlock_irqrestore(&info->lock, flags); 778 break; 779 } 780 tmp = list_first(&info->tx_urbs_free); 781 list_del(tmp); 782 spin_unlock_irqrestore(&info->lock, flags); 783 784 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 785 urb = wrap->urb; 786 bytes = (count > port->bulk_out_size) ? 787 port->bulk_out_size : count; 788 memcpy(urb->transfer_buffer, buf + sent, bytes); 789 790 usb_serial_debug_data(debug, &port->dev, 791 __func__, bytes, urb->transfer_buffer); 792 793 urb->dev = serial->dev; 794 urb->transfer_buffer_length = bytes; 795 result = usb_submit_urb(urb, GFP_ATOMIC); 796 if (result) { 797 dev_err(&port->dev, 798 "%s - failed submitting write urb, error %d\n", 799 __func__, result); 800 sent = result; 801 spin_lock_irqsave(&info->lock, flags); 802 list_add(tmp, &info->tx_urbs_free); 803 spin_unlock_irqrestore(&info->lock, flags); 804 break; 805 } else { 806 sent += bytes; 807 count -= bytes; 808 spin_lock_irqsave(&info->lock, flags); 809 list_add(tmp, &info->tx_urbs_submitted); 810 spin_unlock_irqrestore(&info->lock, flags); 811 } 812 } 813 814 return sent; 815} 816 817static int whiteheat_write_room(struct tty_struct *tty) 818{ 819 struct usb_serial_port *port = tty->driver_data; 820 struct whiteheat_private *info = usb_get_serial_port_data(port); 821 struct list_head *tmp; 822 int room = 0; 823 unsigned long flags; 824 825 dbg("%s - port %d", __func__, port->number); 826 827 spin_lock_irqsave(&info->lock, flags); 828 list_for_each(tmp, &info->tx_urbs_free) 829 room++; 830 spin_unlock_irqrestore(&info->lock, flags); 831 room *= port->bulk_out_size; 832 833 dbg("%s - returns %d", __func__, room); 834 return (room); 835} 836 837static int whiteheat_tiocmget(struct tty_struct *tty, struct file *file) 838{ 839 struct usb_serial_port *port = tty->driver_data; 840 struct whiteheat_private *info = usb_get_serial_port_data(port); 841 unsigned int modem_signals = 0; 842 843 dbg("%s - port %d", __func__, port->number); 844 845 firm_get_dtr_rts(port); 846 if (info->mcr & UART_MCR_DTR) 847 modem_signals |= TIOCM_DTR; 848 if (info->mcr & UART_MCR_RTS) 849 modem_signals |= TIOCM_RTS; 850 851 return modem_signals; 852} 853 854static int whiteheat_tiocmset(struct tty_struct *tty, struct file *file, 855 unsigned int set, unsigned int clear) 856{ 857 struct usb_serial_port *port = tty->driver_data; 858 struct whiteheat_private *info = usb_get_serial_port_data(port); 859 860 dbg("%s - port %d", __func__, port->number); 861 862 if (set & TIOCM_RTS) 863 info->mcr |= UART_MCR_RTS; 864 if (set & TIOCM_DTR) 865 info->mcr |= UART_MCR_DTR; 866 867 if (clear & TIOCM_RTS) 868 info->mcr &= ~UART_MCR_RTS; 869 if (clear & TIOCM_DTR) 870 info->mcr &= ~UART_MCR_DTR; 871 872 firm_set_dtr(port, info->mcr & UART_MCR_DTR); 873 firm_set_rts(port, info->mcr & UART_MCR_RTS); 874 return 0; 875} 876 877 878static int whiteheat_ioctl(struct tty_struct *tty, struct file *file, 879 unsigned int cmd, unsigned long arg) 880{ 881 struct usb_serial_port *port = tty->driver_data; 882 struct serial_struct serstruct; 883 void __user *user_arg = (void __user *)arg; 884 885 dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); 886 887 switch (cmd) { 888 case TIOCGSERIAL: 889 memset(&serstruct, 0, sizeof(serstruct)); 890 serstruct.type = PORT_16654; 891 serstruct.line = port->serial->minor; 892 serstruct.port = port->number; 893 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 894 serstruct.xmit_fifo_size = port->bulk_out_size; 895 serstruct.custom_divisor = 0; 896 serstruct.baud_base = 460800; 897 serstruct.close_delay = CLOSING_DELAY; 898 serstruct.closing_wait = CLOSING_DELAY; 899 900 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct))) 901 return -EFAULT; 902 break; 903 default: 904 break; 905 } 906 907 return -ENOIOCTLCMD; 908} 909 910 911static void whiteheat_set_termios(struct tty_struct *tty, 912 struct usb_serial_port *port, struct ktermios *old_termios) 913{ 914 firm_setup_port(tty); 915} 916 917static void whiteheat_break_ctl(struct tty_struct *tty, int break_state) 918{ 919 struct usb_serial_port *port = tty->driver_data; 920 firm_set_break(port, break_state); 921} 922 923 924static int whiteheat_chars_in_buffer(struct tty_struct *tty) 925{ 926 struct usb_serial_port *port = tty->driver_data; 927 struct whiteheat_private *info = usb_get_serial_port_data(port); 928 struct list_head *tmp; 929 struct whiteheat_urb_wrap *wrap; 930 int chars = 0; 931 unsigned long flags; 932 933 dbg("%s - port %d", __func__, port->number); 934 935 spin_lock_irqsave(&info->lock, flags); 936 list_for_each(tmp, &info->tx_urbs_submitted) { 937 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 938 chars += wrap->urb->transfer_buffer_length; 939 } 940 spin_unlock_irqrestore(&info->lock, flags); 941 942 dbg("%s - returns %d", __func__, chars); 943 return chars; 944} 945 946 947static void whiteheat_throttle(struct tty_struct *tty) 948{ 949 struct usb_serial_port *port = tty->driver_data; 950 struct whiteheat_private *info = usb_get_serial_port_data(port); 951 952 dbg("%s - port %d", __func__, port->number); 953 954 spin_lock_irq(&info->lock); 955 info->flags |= THROTTLED; 956 spin_unlock_irq(&info->lock); 957 958 return; 959} 960 961 962static void whiteheat_unthrottle(struct tty_struct *tty) 963{ 964 struct usb_serial_port *port = tty->driver_data; 965 struct whiteheat_private *info = usb_get_serial_port_data(port); 966 int actually_throttled; 967 968 dbg("%s - port %d", __func__, port->number); 969 970 spin_lock_irq(&info->lock); 971 actually_throttled = info->flags & ACTUALLY_THROTTLED; 972 info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED); 973 spin_unlock_irq(&info->lock); 974 975 if (actually_throttled) 976 rx_data_softint(&info->rx_work); 977 978 return; 979} 980 981 982/***************************************************************************** 983 * Connect Tech's White Heat callback routines 984 *****************************************************************************/ 985static void command_port_write_callback(struct urb *urb) 986{ 987 int status = urb->status; 988 989 dbg("%s", __func__); 990 991 if (status) { 992 dbg("nonzero urb status: %d", status); 993 return; 994 } 995} 996 997 998static void command_port_read_callback(struct urb *urb) 999{ 1000 struct usb_serial_port *command_port = urb->context; 1001 struct whiteheat_command_private *command_info; 1002 int status = urb->status; 1003 unsigned char *data = urb->transfer_buffer; 1004 int result; 1005 1006 dbg("%s", __func__); 1007 1008 command_info = usb_get_serial_port_data(command_port); 1009 if (!command_info) { 1010 dbg("%s - command_info is NULL, exiting.", __func__); 1011 return; 1012 } 1013 if (status) { 1014 dbg("%s - nonzero urb status: %d", __func__, status); 1015 if (status != -ENOENT) 1016 command_info->command_finished = WHITEHEAT_CMD_FAILURE; 1017 wake_up(&command_info->wait_command); 1018 return; 1019 } 1020 1021 usb_serial_debug_data(debug, &command_port->dev, 1022 __func__, urb->actual_length, data); 1023 1024 if (data[0] == WHITEHEAT_CMD_COMPLETE) { 1025 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 1026 wake_up(&command_info->wait_command); 1027 } else if (data[0] == WHITEHEAT_CMD_FAILURE) { 1028 command_info->command_finished = WHITEHEAT_CMD_FAILURE; 1029 wake_up(&command_info->wait_command); 1030 } else if (data[0] == WHITEHEAT_EVENT) { 1031 /* These are unsolicited reports from the firmware, hence no 1032 waiting command to wakeup */ 1033 dbg("%s - event received", __func__); 1034 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) { 1035 memcpy(command_info->result_buffer, &data[1], 1036 urb->actual_length - 1); 1037 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 1038 wake_up(&command_info->wait_command); 1039 } else 1040 dbg("%s - bad reply from firmware", __func__); 1041 1042 /* Continue trying to always read */ 1043 command_port->read_urb->dev = command_port->serial->dev; 1044 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC); 1045 if (result) 1046 dbg("%s - failed resubmitting read urb, error %d", 1047 __func__, result); 1048} 1049 1050 1051static void whiteheat_read_callback(struct urb *urb) 1052{ 1053 struct usb_serial_port *port = urb->context; 1054 struct whiteheat_urb_wrap *wrap; 1055 unsigned char *data = urb->transfer_buffer; 1056 struct whiteheat_private *info = usb_get_serial_port_data(port); 1057 int status = urb->status; 1058 1059 dbg("%s - port %d", __func__, port->number); 1060 1061 spin_lock(&info->lock); 1062 wrap = urb_to_wrap(urb, &info->rx_urbs_submitted); 1063 if (!wrap) { 1064 spin_unlock(&info->lock); 1065 dev_err(&port->dev, "%s - Not my urb!\n", __func__); 1066 return; 1067 } 1068 list_del(&wrap->list); 1069 spin_unlock(&info->lock); 1070 1071 if (status) { 1072 dbg("%s - nonzero read bulk status received: %d", 1073 __func__, status); 1074 spin_lock(&info->lock); 1075 list_add(&wrap->list, &info->rx_urbs_free); 1076 spin_unlock(&info->lock); 1077 return; 1078 } 1079 1080 usb_serial_debug_data(debug, &port->dev, 1081 __func__, urb->actual_length, data); 1082 1083 spin_lock(&info->lock); 1084 list_add_tail(&wrap->list, &info->rx_urb_q); 1085 if (info->flags & THROTTLED) { 1086 info->flags |= ACTUALLY_THROTTLED; 1087 spin_unlock(&info->lock); 1088 return; 1089 } 1090 spin_unlock(&info->lock); 1091 1092 schedule_work(&info->rx_work); 1093} 1094 1095 1096static void whiteheat_write_callback(struct urb *urb) 1097{ 1098 struct usb_serial_port *port = urb->context; 1099 struct whiteheat_private *info = usb_get_serial_port_data(port); 1100 struct whiteheat_urb_wrap *wrap; 1101 int status = urb->status; 1102 1103 dbg("%s - port %d", __func__, port->number); 1104 1105 spin_lock(&info->lock); 1106 wrap = urb_to_wrap(urb, &info->tx_urbs_submitted); 1107 if (!wrap) { 1108 spin_unlock(&info->lock); 1109 dev_err(&port->dev, "%s - Not my urb!\n", __func__); 1110 return; 1111 } 1112 list_move(&wrap->list, &info->tx_urbs_free); 1113 spin_unlock(&info->lock); 1114 1115 if (status) { 1116 dbg("%s - nonzero write bulk status received: %d", 1117 __func__, status); 1118 return; 1119 } 1120 1121 usb_serial_port_softint(port); 1122} 1123 1124 1125/***************************************************************************** 1126 * Connect Tech's White Heat firmware interface 1127 *****************************************************************************/ 1128static int firm_send_command(struct usb_serial_port *port, __u8 command, 1129 __u8 *data, __u8 datasize) 1130{ 1131 struct usb_serial_port *command_port; 1132 struct whiteheat_command_private *command_info; 1133 struct whiteheat_private *info; 1134 __u8 *transfer_buffer; 1135 int retval = 0; 1136 int t; 1137 1138 dbg("%s - command %d", __func__, command); 1139 1140 command_port = port->serial->port[COMMAND_PORT]; 1141 command_info = usb_get_serial_port_data(command_port); 1142 mutex_lock(&command_info->mutex); 1143 command_info->command_finished = false; 1144 1145 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer; 1146 transfer_buffer[0] = command; 1147 memcpy(&transfer_buffer[1], data, datasize); 1148 command_port->write_urb->transfer_buffer_length = datasize + 1; 1149 command_port->write_urb->dev = port->serial->dev; 1150 retval = usb_submit_urb(command_port->write_urb, GFP_NOIO); 1151 if (retval) { 1152 dbg("%s - submit urb failed", __func__); 1153 goto exit; 1154 } 1155 1156 /* wait for the command to complete */ 1157 t = wait_event_timeout(command_info->wait_command, 1158 (bool)command_info->command_finished, COMMAND_TIMEOUT); 1159 if (!t) 1160 usb_kill_urb(command_port->write_urb); 1161 1162 if (command_info->command_finished == false) { 1163 dbg("%s - command timed out.", __func__); 1164 retval = -ETIMEDOUT; 1165 goto exit; 1166 } 1167 1168 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) { 1169 dbg("%s - command failed.", __func__); 1170 retval = -EIO; 1171 goto exit; 1172 } 1173 1174 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) { 1175 dbg("%s - command completed.", __func__); 1176 switch (command) { 1177 case WHITEHEAT_GET_DTR_RTS: 1178 info = usb_get_serial_port_data(port); 1179 memcpy(&info->mcr, command_info->result_buffer, 1180 sizeof(struct whiteheat_dr_info)); 1181 break; 1182 } 1183 } 1184exit: 1185 mutex_unlock(&command_info->mutex); 1186 return retval; 1187} 1188 1189 1190static int firm_open(struct usb_serial_port *port) 1191{ 1192 struct whiteheat_simple open_command; 1193 1194 open_command.port = port->number - port->serial->minor + 1; 1195 return firm_send_command(port, WHITEHEAT_OPEN, 1196 (__u8 *)&open_command, sizeof(open_command)); 1197} 1198 1199 1200static int firm_close(struct usb_serial_port *port) 1201{ 1202 struct whiteheat_simple close_command; 1203 1204 close_command.port = port->number - port->serial->minor + 1; 1205 return firm_send_command(port, WHITEHEAT_CLOSE, 1206 (__u8 *)&close_command, sizeof(close_command)); 1207} 1208 1209 1210static void firm_setup_port(struct tty_struct *tty) 1211{ 1212 struct usb_serial_port *port = tty->driver_data; 1213 struct whiteheat_port_settings port_settings; 1214 unsigned int cflag = tty->termios->c_cflag; 1215 1216 port_settings.port = port->number + 1; 1217 1218 /* get the byte size */ 1219 switch (cflag & CSIZE) { 1220 case CS5: port_settings.bits = 5; break; 1221 case CS6: port_settings.bits = 6; break; 1222 case CS7: port_settings.bits = 7; break; 1223 default: 1224 case CS8: port_settings.bits = 8; break; 1225 } 1226 dbg("%s - data bits = %d", __func__, port_settings.bits); 1227 1228 /* determine the parity */ 1229 if (cflag & PARENB) 1230 if (cflag & CMSPAR) 1231 if (cflag & PARODD) 1232 port_settings.parity = WHITEHEAT_PAR_MARK; 1233 else 1234 port_settings.parity = WHITEHEAT_PAR_SPACE; 1235 else 1236 if (cflag & PARODD) 1237 port_settings.parity = WHITEHEAT_PAR_ODD; 1238 else 1239 port_settings.parity = WHITEHEAT_PAR_EVEN; 1240 else 1241 port_settings.parity = WHITEHEAT_PAR_NONE; 1242 dbg("%s - parity = %c", __func__, port_settings.parity); 1243 1244 /* figure out the stop bits requested */ 1245 if (cflag & CSTOPB) 1246 port_settings.stop = 2; 1247 else 1248 port_settings.stop = 1; 1249 dbg("%s - stop bits = %d", __func__, port_settings.stop); 1250 1251 /* figure out the flow control settings */ 1252 if (cflag & CRTSCTS) 1253 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | 1254 WHITEHEAT_HFLOW_RTS); 1255 else 1256 port_settings.hflow = WHITEHEAT_HFLOW_NONE; 1257 dbg("%s - hardware flow control = %s %s %s %s", __func__, 1258 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "", 1259 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "", 1260 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "", 1261 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : ""); 1262 1263 /* determine software flow control */ 1264 if (I_IXOFF(tty)) 1265 port_settings.sflow = WHITEHEAT_SFLOW_RXTX; 1266 else 1267 port_settings.sflow = WHITEHEAT_SFLOW_NONE; 1268 dbg("%s - software flow control = %c", __func__, port_settings.sflow); 1269 1270 port_settings.xon = START_CHAR(tty); 1271 port_settings.xoff = STOP_CHAR(tty); 1272 dbg("%s - XON = %2x, XOFF = %2x", 1273 __func__, port_settings.xon, port_settings.xoff); 1274 1275 /* get the baud rate wanted */ 1276 port_settings.baud = tty_get_baud_rate(tty); 1277 dbg("%s - baud rate = %d", __func__, port_settings.baud); 1278 1279 tty_encode_baud_rate(tty, port_settings.baud, port_settings.baud); 1280 /* handle any settings that aren't specified in the tty structure */ 1281 port_settings.lloop = 0; 1282 1283 /* now send the message to the device */ 1284 firm_send_command(port, WHITEHEAT_SETUP_PORT, 1285 (__u8 *)&port_settings, sizeof(port_settings)); 1286} 1287 1288 1289static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) 1290{ 1291 struct whiteheat_set_rdb rts_command; 1292 1293 rts_command.port = port->number - port->serial->minor + 1; 1294 rts_command.state = onoff; 1295 return firm_send_command(port, WHITEHEAT_SET_RTS, 1296 (__u8 *)&rts_command, sizeof(rts_command)); 1297} 1298 1299 1300static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) 1301{ 1302 struct whiteheat_set_rdb dtr_command; 1303 1304 dtr_command.port = port->number - port->serial->minor + 1; 1305 dtr_command.state = onoff; 1306 return firm_send_command(port, WHITEHEAT_SET_DTR, 1307 (__u8 *)&dtr_command, sizeof(dtr_command)); 1308} 1309 1310 1311static int firm_set_break(struct usb_serial_port *port, __u8 onoff) 1312{ 1313 struct whiteheat_set_rdb break_command; 1314 1315 break_command.port = port->number - port->serial->minor + 1; 1316 break_command.state = onoff; 1317 return firm_send_command(port, WHITEHEAT_SET_BREAK, 1318 (__u8 *)&break_command, sizeof(break_command)); 1319} 1320 1321 1322static int firm_purge(struct usb_serial_port *port, __u8 rxtx) 1323{ 1324 struct whiteheat_purge purge_command; 1325 1326 purge_command.port = port->number - port->serial->minor + 1; 1327 purge_command.what = rxtx; 1328 return firm_send_command(port, WHITEHEAT_PURGE, 1329 (__u8 *)&purge_command, sizeof(purge_command)); 1330} 1331 1332 1333static int firm_get_dtr_rts(struct usb_serial_port *port) 1334{ 1335 struct whiteheat_simple get_dr_command; 1336 1337 get_dr_command.port = port->number - port->serial->minor + 1; 1338 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, 1339 (__u8 *)&get_dr_command, sizeof(get_dr_command)); 1340} 1341 1342 1343static int firm_report_tx_done(struct usb_serial_port *port) 1344{ 1345 struct whiteheat_simple close_command; 1346 1347 close_command.port = port->number - port->serial->minor + 1; 1348 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, 1349 (__u8 *)&close_command, sizeof(close_command)); 1350} 1351 1352 1353/***************************************************************************** 1354 * Connect Tech's White Heat utility functions 1355 *****************************************************************************/ 1356static int start_command_port(struct usb_serial *serial) 1357{ 1358 struct usb_serial_port *command_port; 1359 struct whiteheat_command_private *command_info; 1360 int retval = 0; 1361 1362 command_port = serial->port[COMMAND_PORT]; 1363 command_info = usb_get_serial_port_data(command_port); 1364 mutex_lock(&command_info->mutex); 1365 if (!command_info->port_running) { 1366 usb_clear_halt(serial->dev, command_port->read_urb->pipe); 1367 1368 command_port->read_urb->dev = serial->dev; 1369 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL); 1370 if (retval) { 1371 dev_err(&serial->dev->dev, 1372 "%s - failed submitting read urb, error %d\n", 1373 __func__, retval); 1374 goto exit; 1375 } 1376 } 1377 command_info->port_running++; 1378 1379exit: 1380 mutex_unlock(&command_info->mutex); 1381 return retval; 1382} 1383 1384 1385static void stop_command_port(struct usb_serial *serial) 1386{ 1387 struct usb_serial_port *command_port; 1388 struct whiteheat_command_private *command_info; 1389 1390 command_port = serial->port[COMMAND_PORT]; 1391 command_info = usb_get_serial_port_data(command_port); 1392 mutex_lock(&command_info->mutex); 1393 command_info->port_running--; 1394 if (!command_info->port_running) 1395 usb_kill_urb(command_port->read_urb); 1396 mutex_unlock(&command_info->mutex); 1397} 1398 1399 1400static int start_port_read(struct usb_serial_port *port) 1401{ 1402 struct whiteheat_private *info = usb_get_serial_port_data(port); 1403 struct whiteheat_urb_wrap *wrap; 1404 struct urb *urb; 1405 int retval = 0; 1406 unsigned long flags; 1407 struct list_head *tmp; 1408 struct list_head *tmp2; 1409 1410 spin_lock_irqsave(&info->lock, flags); 1411 1412 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 1413 list_del(tmp); 1414 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1415 urb = wrap->urb; 1416 urb->dev = port->serial->dev; 1417 spin_unlock_irqrestore(&info->lock, flags); 1418 retval = usb_submit_urb(urb, GFP_KERNEL); 1419 if (retval) { 1420 spin_lock_irqsave(&info->lock, flags); 1421 list_add(tmp, &info->rx_urbs_free); 1422 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 1423 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1424 urb = wrap->urb; 1425 list_del(tmp); 1426 spin_unlock_irqrestore(&info->lock, flags); 1427 usb_kill_urb(urb); 1428 spin_lock_irqsave(&info->lock, flags); 1429 list_add(tmp, &info->rx_urbs_free); 1430 } 1431 break; 1432 } 1433 spin_lock_irqsave(&info->lock, flags); 1434 list_add(tmp, &info->rx_urbs_submitted); 1435 } 1436 1437 spin_unlock_irqrestore(&info->lock, flags); 1438 1439 return retval; 1440} 1441 1442 1443static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, 1444 struct list_head *head) 1445{ 1446 struct whiteheat_urb_wrap *wrap; 1447 struct list_head *tmp; 1448 1449 list_for_each(tmp, head) { 1450 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1451 if (wrap->urb == urb) 1452 return wrap; 1453 } 1454 1455 return NULL; 1456} 1457 1458 1459static struct list_head *list_first(struct list_head *head) 1460{ 1461 return head->next; 1462} 1463 1464 1465static void rx_data_softint(struct work_struct *work) 1466{ 1467 struct whiteheat_private *info = 1468 container_of(work, struct whiteheat_private, rx_work); 1469 struct usb_serial_port *port = info->port; 1470 struct tty_struct *tty = tty_port_tty_get(&port->port); 1471 struct whiteheat_urb_wrap *wrap; 1472 struct urb *urb; 1473 unsigned long flags; 1474 struct list_head *tmp; 1475 struct list_head *tmp2; 1476 int result; 1477 int sent = 0; 1478 1479 spin_lock_irqsave(&info->lock, flags); 1480 if (info->flags & THROTTLED) { 1481 spin_unlock_irqrestore(&info->lock, flags); 1482 goto out; 1483 } 1484 1485 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) { 1486 list_del(tmp); 1487 spin_unlock_irqrestore(&info->lock, flags); 1488 1489 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1490 urb = wrap->urb; 1491 1492 if (tty && urb->actual_length) 1493 sent += tty_insert_flip_string(tty, 1494 urb->transfer_buffer, urb->actual_length); 1495 1496 urb->dev = port->serial->dev; 1497 result = usb_submit_urb(urb, GFP_ATOMIC); 1498 if (result) { 1499 dev_err(&port->dev, 1500 "%s - failed resubmitting read urb, error %d\n", 1501 __func__, result); 1502 spin_lock_irqsave(&info->lock, flags); 1503 list_add(tmp, &info->rx_urbs_free); 1504 continue; 1505 } 1506 1507 spin_lock_irqsave(&info->lock, flags); 1508 list_add(tmp, &info->rx_urbs_submitted); 1509 } 1510 spin_unlock_irqrestore(&info->lock, flags); 1511 1512 if (sent) 1513 tty_flip_buffer_push(tty); 1514out: 1515 tty_kref_put(tty); 1516} 1517 1518 1519/***************************************************************************** 1520 * Connect Tech's White Heat module functions 1521 *****************************************************************************/ 1522static int __init whiteheat_init(void) 1523{ 1524 int retval; 1525 retval = usb_serial_register(&whiteheat_fake_device); 1526 if (retval) 1527 goto failed_fake_register; 1528 retval = usb_serial_register(&whiteheat_device); 1529 if (retval) 1530 goto failed_device_register; 1531 retval = usb_register(&whiteheat_driver); 1532 if (retval) 1533 goto failed_usb_register; 1534 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 1535 DRIVER_DESC "\n"); 1536 return 0; 1537failed_usb_register: 1538 usb_serial_deregister(&whiteheat_device); 1539failed_device_register: 1540 usb_serial_deregister(&whiteheat_fake_device); 1541failed_fake_register: 1542 return retval; 1543} 1544 1545 1546static void __exit whiteheat_exit(void) 1547{ 1548 usb_deregister(&whiteheat_driver); 1549 usb_serial_deregister(&whiteheat_fake_device); 1550 usb_serial_deregister(&whiteheat_device); 1551} 1552 1553 1554module_init(whiteheat_init); 1555module_exit(whiteheat_exit); 1556 1557MODULE_AUTHOR(DRIVER_AUTHOR); 1558MODULE_DESCRIPTION(DRIVER_DESC); 1559MODULE_LICENSE("GPL"); 1560 1561MODULE_FIRMWARE("whiteheat.fw"); 1562MODULE_FIRMWARE("whiteheat_loader.fw"); 1563 1564module_param(urb_pool_size, int, 0); 1565MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering"); 1566 1567module_param(debug, bool, S_IRUGO | S_IWUSR); 1568MODULE_PARM_DESC(debug, "Debug enabled or not"); 1569