whiteheat.c revision 80359a9c5c03d585686e2596c9ee46703eb03047
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 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 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 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_shutdown(struct usb_serial *serial); 148static int whiteheat_open(struct tty_struct *tty, 149 struct usb_serial_port *port, struct file *filp); 150static void whiteheat_close(struct tty_struct *tty, 151 struct usb_serial_port *port, struct file *filp); 152static int whiteheat_write(struct tty_struct *tty, 153 struct usb_serial_port *port, 154 const unsigned char *buf, int count); 155static int whiteheat_write_room(struct tty_struct *tty); 156static int whiteheat_ioctl(struct tty_struct *tty, struct file *file, 157 unsigned int cmd, unsigned long arg); 158static void whiteheat_set_termios(struct tty_struct *tty, 159 struct usb_serial_port *port, struct ktermios *old); 160static int whiteheat_tiocmget(struct tty_struct *tty, struct file *file); 161static int whiteheat_tiocmset(struct tty_struct *tty, struct file *file, 162 unsigned int set, unsigned int clear); 163static void whiteheat_break_ctl(struct tty_struct *tty, int break_state); 164static int whiteheat_chars_in_buffer(struct tty_struct *tty); 165static void whiteheat_throttle(struct tty_struct *tty); 166static void whiteheat_unthrottle(struct tty_struct *tty); 167static void whiteheat_read_callback(struct urb *urb); 168static void whiteheat_write_callback(struct urb *urb); 169 170static struct usb_serial_driver whiteheat_fake_device = { 171 .driver = { 172 .owner = THIS_MODULE, 173 .name = "whiteheatnofirm", 174 }, 175 .description = "Connect Tech - WhiteHEAT - (prerenumeration)", 176 .usb_driver = &whiteheat_driver, 177 .id_table = id_table_prerenumeration, 178 .num_ports = 1, 179 .probe = whiteheat_firmware_download, 180 .attach = whiteheat_firmware_attach, 181}; 182 183static struct usb_serial_driver whiteheat_device = { 184 .driver = { 185 .owner = THIS_MODULE, 186 .name = "whiteheat", 187 }, 188 .description = "Connect Tech - WhiteHEAT", 189 .usb_driver = &whiteheat_driver, 190 .id_table = id_table_std, 191 .num_ports = 4, 192 .attach = whiteheat_attach, 193 .shutdown = whiteheat_shutdown, 194 .open = whiteheat_open, 195 .close = whiteheat_close, 196 .write = whiteheat_write, 197 .write_room = whiteheat_write_room, 198 .ioctl = whiteheat_ioctl, 199 .set_termios = whiteheat_set_termios, 200 .break_ctl = whiteheat_break_ctl, 201 .tiocmget = whiteheat_tiocmget, 202 .tiocmset = whiteheat_tiocmset, 203 .chars_in_buffer = whiteheat_chars_in_buffer, 204 .throttle = whiteheat_throttle, 205 .unthrottle = whiteheat_unthrottle, 206 .read_bulk_callback = whiteheat_read_callback, 207 .write_bulk_callback = whiteheat_write_callback, 208}; 209 210 211struct whiteheat_command_private { 212 struct mutex mutex; 213 __u8 port_running; 214 __u8 command_finished; 215 wait_queue_head_t wait_command; /* for handling sleeping whilst 216 waiting for a command to 217 finish */ 218 __u8 result_buffer[64]; 219}; 220 221 222#define THROTTLED 0x01 223#define ACTUALLY_THROTTLED 0x02 224 225static int urb_pool_size = 8; 226 227struct whiteheat_urb_wrap { 228 struct list_head list; 229 struct urb *urb; 230}; 231 232struct whiteheat_private { 233 spinlock_t lock; 234 __u8 flags; 235 __u8 mcr; /* FIXME: no locking on mcr */ 236 struct list_head rx_urbs_free; 237 struct list_head rx_urbs_submitted; 238 struct list_head rx_urb_q; 239 struct work_struct rx_work; 240 struct usb_serial_port *port; 241 struct list_head tx_urbs_free; 242 struct list_head tx_urbs_submitted; 243 struct mutex deathwarrant; 244}; 245 246 247/* local function prototypes */ 248static int start_command_port(struct usb_serial *serial); 249static void stop_command_port(struct usb_serial *serial); 250static void command_port_write_callback(struct urb *urb); 251static void command_port_read_callback(struct urb *urb); 252 253static int start_port_read(struct usb_serial_port *port); 254static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, 255 struct list_head *head); 256static struct list_head *list_first(struct list_head *head); 257static void rx_data_softint(struct work_struct *work); 258 259static int firm_send_command(struct usb_serial_port *port, __u8 command, 260 __u8 *data, __u8 datasize); 261static int firm_open(struct usb_serial_port *port); 262static int firm_close(struct usb_serial_port *port); 263static int firm_setup_port(struct tty_struct *tty); 264static int firm_set_rts(struct usb_serial_port *port, __u8 onoff); 265static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff); 266static int firm_set_break(struct usb_serial_port *port, __u8 onoff); 267static int firm_purge(struct usb_serial_port *port, __u8 rxtx); 268static int firm_get_dtr_rts(struct usb_serial_port *port); 269static int firm_report_tx_done(struct usb_serial_port *port); 270 271 272#define COMMAND_PORT 4 273#define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */ 274#define COMMAND_TIMEOUT_MS 2000 275#define CLOSING_DELAY (30 * HZ) 276 277 278/***************************************************************************** 279 * Connect Tech's White Heat prerenumeration driver functions 280 *****************************************************************************/ 281 282/* steps to download the firmware to the WhiteHEAT device: 283 - hold the reset (by writing to the reset bit of the CPUCS register) 284 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD 285 - release the reset (by writing to the CPUCS register) 286 - download the WH.HEX file for all addresses greater than 0x1b3f using 287 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD 288 - hold the reset 289 - download the WH.HEX file for all addresses less than 0x1b40 using 290 VENDOR_REQUEST_ANCHOR_LOAD 291 - release the reset 292 - device renumerated itself and comes up as new device id with all 293 firmware download completed. 294*/ 295static int whiteheat_firmware_download(struct usb_serial *serial, 296 const struct usb_device_id *id) 297{ 298 int response, ret = -ENOENT; 299 const struct firmware *loader_fw = NULL, *firmware_fw = NULL; 300 const struct ihex_binrec *record; 301 302 dbg("%s", __func__); 303 304 if (request_ihex_firmware(&firmware_fw, "whiteheat.fw", 305 &serial->dev->dev)) { 306 err("%s - request \"whiteheat.fw\" failed", __func__); 307 goto out; 308 } 309 if (request_ihex_firmware(&loader_fw, "whiteheat_loader.fw", 310 &serial->dev->dev)) { 311 err("%s - request \"whiteheat_loader.fw\" failed", __func__); 312 goto out; 313 } 314 ret = 0; 315 response = ezusb_set_reset (serial, 1); 316 317 record = (const struct ihex_binrec *)loader_fw->data; 318 while (record) { 319 response = ezusb_writememory (serial, be32_to_cpu(record->addr), 320 (unsigned char *)record->data, 321 be16_to_cpu(record->len), 0xa0); 322 if (response < 0) { 323 err("%s - ezusb_writememory failed for loader (%d %04X %p %d)", 324 __func__, response, be32_to_cpu(record->addr), 325 record->data, be16_to_cpu(record->len)); 326 break; 327 } 328 record = ihex_next_binrec(record); 329 } 330 331 response = ezusb_set_reset(serial, 0); 332 333 record = (const struct ihex_binrec *)firmware_fw->data; 334 while (record && be32_to_cpu(record->addr) < 0x1b40) 335 record = ihex_next_binrec(record); 336 while (record) { 337 response = ezusb_writememory (serial, be32_to_cpu(record->addr), 338 (unsigned char *)record->data, 339 be16_to_cpu(record->len), 0xa3); 340 if (response < 0) { 341 err("%s - ezusb_writememory failed for first firmware step (%d %04X %p %d)", 342 __func__, response, be32_to_cpu(record->addr), 343 record->data, be16_to_cpu(record->len)); 344 break; 345 } 346 ++record; 347 } 348 349 response = ezusb_set_reset(serial, 1); 350 351 record = (const struct ihex_binrec *)firmware_fw->data; 352 while (record && be32_to_cpu(record->addr) < 0x1b40) { 353 response = ezusb_writememory (serial, be32_to_cpu(record->addr), 354 (unsigned char *)record->data, 355 be16_to_cpu(record->len), 0xa0); 356 if (response < 0) { 357 err("%s - ezusb_writememory failed for second firmware step (%d %04X %p %d)", 358 __func__, response, be32_to_cpu(record->addr), 359 record->data, be16_to_cpu(record->len)); 360 break; 361 } 362 ++record; 363 } 364 ret = 0; 365 response = ezusb_set_reset (serial, 0); 366 out: 367 release_firmware(loader_fw); 368 release_firmware(firmware_fw); 369 return ret; 370} 371 372 373static int whiteheat_firmware_attach(struct usb_serial *serial) 374{ 375 /* We want this device to fail to have a driver assigned to it */ 376 return 1; 377} 378 379 380/***************************************************************************** 381 * Connect Tech's White Heat serial driver functions 382 *****************************************************************************/ 383static int whiteheat_attach(struct usb_serial *serial) 384{ 385 struct usb_serial_port *command_port; 386 struct whiteheat_command_private *command_info; 387 struct usb_serial_port *port; 388 struct whiteheat_private *info; 389 struct whiteheat_hw_info *hw_info; 390 int pipe; 391 int ret; 392 int alen; 393 __u8 *command; 394 __u8 *result; 395 int i; 396 int j; 397 struct urb *urb; 398 int buf_size; 399 struct whiteheat_urb_wrap *wrap; 400 struct list_head *tmp; 401 402 command_port = serial->port[COMMAND_PORT]; 403 404 pipe = usb_sndbulkpipe(serial->dev, 405 command_port->bulk_out_endpointAddress); 406 command = kmalloc(2, GFP_KERNEL); 407 if (!command) 408 goto no_command_buffer; 409 command[0] = WHITEHEAT_GET_HW_INFO; 410 command[1] = 0; 411 412 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL); 413 if (!result) 414 goto no_result_buffer; 415 /* 416 * When the module is reloaded the firmware is still there and 417 * the endpoints are still in the usb core unchanged. This is the 418 * unlinking bug in disguise. Same for the call below. 419 */ 420 usb_clear_halt(serial->dev, pipe); 421 ret = usb_bulk_msg(serial->dev, pipe, command, 2, 422 &alen, COMMAND_TIMEOUT_MS); 423 if (ret) { 424 err("%s: Couldn't send command [%d]", 425 serial->type->description, ret); 426 goto no_firmware; 427 } else if (alen != 2) { 428 err("%s: Send command incomplete [%d]", 429 serial->type->description, alen); 430 goto no_firmware; 431 } 432 433 pipe = usb_rcvbulkpipe(serial->dev, 434 command_port->bulk_in_endpointAddress); 435 /* See the comment on the usb_clear_halt() above */ 436 usb_clear_halt(serial->dev, pipe); 437 ret = usb_bulk_msg(serial->dev, pipe, result, 438 sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS); 439 if (ret) { 440 err("%s: Couldn't get results [%d]", 441 serial->type->description, ret); 442 goto no_firmware; 443 } else if (alen != sizeof(*hw_info) + 1) { 444 err("%s: Get results incomplete [%d]", 445 serial->type->description, alen); 446 goto no_firmware; 447 } else if (result[0] != command[0]) { 448 err("%s: Command failed [%d]", 449 serial->type->description, result[0]); 450 goto no_firmware; 451 } 452 453 hw_info = (struct whiteheat_hw_info *)&result[1]; 454 455 info("%s: Driver %s: Firmware v%d.%02d", serial->type->description, 456 DRIVER_VERSION, hw_info->sw_major_rev, hw_info->sw_minor_rev); 457 458 for (i = 0; i < serial->num_ports; i++) { 459 port = serial->port[i]; 460 461 info = kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL); 462 if (info == NULL) { 463 err("%s: Out of memory for port structures\n", 464 serial->type->description); 465 goto no_private; 466 } 467 468 spin_lock_init(&info->lock); 469 mutex_init(&info->deathwarrant); 470 info->flags = 0; 471 info->mcr = 0; 472 INIT_WORK(&info->rx_work, rx_data_softint); 473 info->port = port; 474 475 INIT_LIST_HEAD(&info->rx_urbs_free); 476 INIT_LIST_HEAD(&info->rx_urbs_submitted); 477 INIT_LIST_HEAD(&info->rx_urb_q); 478 INIT_LIST_HEAD(&info->tx_urbs_free); 479 INIT_LIST_HEAD(&info->tx_urbs_submitted); 480 481 for (j = 0; j < urb_pool_size; j++) { 482 urb = usb_alloc_urb(0, GFP_KERNEL); 483 if (!urb) { 484 err("No free urbs available"); 485 goto no_rx_urb; 486 } 487 buf_size = port->read_urb->transfer_buffer_length; 488 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 489 if (!urb->transfer_buffer) { 490 err("Couldn't allocate urb buffer"); 491 goto no_rx_buf; 492 } 493 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 494 if (!wrap) { 495 err("Couldn't allocate urb wrapper"); 496 goto no_rx_wrap; 497 } 498 usb_fill_bulk_urb(urb, serial->dev, 499 usb_rcvbulkpipe(serial->dev, 500 port->bulk_in_endpointAddress), 501 urb->transfer_buffer, buf_size, 502 whiteheat_read_callback, port); 503 wrap->urb = urb; 504 list_add(&wrap->list, &info->rx_urbs_free); 505 506 urb = usb_alloc_urb(0, GFP_KERNEL); 507 if (!urb) { 508 err("No free urbs available"); 509 goto no_tx_urb; 510 } 511 buf_size = port->write_urb->transfer_buffer_length; 512 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 513 if (!urb->transfer_buffer) { 514 err("Couldn't allocate urb buffer"); 515 goto no_tx_buf; 516 } 517 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 518 if (!wrap) { 519 err("Couldn't allocate urb wrapper"); 520 goto no_tx_wrap; 521 } 522 usb_fill_bulk_urb(urb, serial->dev, 523 usb_sndbulkpipe(serial->dev, 524 port->bulk_out_endpointAddress), 525 urb->transfer_buffer, buf_size, 526 whiteheat_write_callback, port); 527 wrap->urb = urb; 528 list_add(&wrap->list, &info->tx_urbs_free); 529 } 530 531 usb_set_serial_port_data(port, info); 532 } 533 534 command_info = kmalloc(sizeof(struct whiteheat_command_private), 535 GFP_KERNEL); 536 if (command_info == NULL) { 537 err("%s: Out of memory for port structures\n", 538 serial->type->description); 539 goto no_command_private; 540 } 541 542 mutex_init(&command_info->mutex); 543 command_info->port_running = 0; 544 init_waitqueue_head(&command_info->wait_command); 545 usb_set_serial_port_data(command_port, command_info); 546 command_port->write_urb->complete = command_port_write_callback; 547 command_port->read_urb->complete = command_port_read_callback; 548 kfree(result); 549 kfree(command); 550 551 return 0; 552 553no_firmware: 554 /* Firmware likely not running */ 555 err("%s: Unable to retrieve firmware version, try replugging\n", 556 serial->type->description); 557 err("%s: If the firmware is not running (status led not blinking)\n", 558 serial->type->description); 559 err("%s: please contact support@connecttech.com\n", 560 serial->type->description); 561 kfree(result); 562 return -ENODEV; 563 564no_command_private: 565 for (i = serial->num_ports - 1; i >= 0; i--) { 566 port = serial->port[i]; 567 info = usb_get_serial_port_data(port); 568 for (j = urb_pool_size - 1; j >= 0; j--) { 569 tmp = list_first(&info->tx_urbs_free); 570 list_del(tmp); 571 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 572 urb = wrap->urb; 573 kfree(wrap); 574no_tx_wrap: 575 kfree(urb->transfer_buffer); 576no_tx_buf: 577 usb_free_urb(urb); 578no_tx_urb: 579 tmp = list_first(&info->rx_urbs_free); 580 list_del(tmp); 581 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 582 urb = wrap->urb; 583 kfree(wrap); 584no_rx_wrap: 585 kfree(urb->transfer_buffer); 586no_rx_buf: 587 usb_free_urb(urb); 588no_rx_urb: 589 ; 590 } 591 kfree(info); 592no_private: 593 ; 594 } 595 kfree(result); 596no_result_buffer: 597 kfree(command); 598no_command_buffer: 599 return -ENOMEM; 600} 601 602 603static void whiteheat_shutdown(struct usb_serial *serial) 604{ 605 struct usb_serial_port *command_port; 606 struct usb_serial_port *port; 607 struct whiteheat_private *info; 608 struct whiteheat_urb_wrap *wrap; 609 struct urb *urb; 610 struct list_head *tmp; 611 struct list_head *tmp2; 612 int i; 613 614 dbg("%s", __func__); 615 616 /* free up our private data for our command port */ 617 command_port = serial->port[COMMAND_PORT]; 618 kfree(usb_get_serial_port_data(command_port)); 619 620 for (i = 0; i < serial->num_ports; i++) { 621 port = serial->port[i]; 622 info = usb_get_serial_port_data(port); 623 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 624 list_del(tmp); 625 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 626 urb = wrap->urb; 627 kfree(wrap); 628 kfree(urb->transfer_buffer); 629 usb_free_urb(urb); 630 } 631 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) { 632 list_del(tmp); 633 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 634 urb = wrap->urb; 635 kfree(wrap); 636 kfree(urb->transfer_buffer); 637 usb_free_urb(urb); 638 } 639 kfree(info); 640 } 641 642 return; 643} 644 645static int whiteheat_open(struct tty_struct *tty, 646 struct usb_serial_port *port, struct file *filp) 647{ 648 int retval = 0; 649 struct ktermios old_term; 650 651 dbg("%s - port %d", __func__, port->number); 652 653 retval = start_command_port(port->serial); 654 if (retval) 655 goto exit; 656 657 if (tty) 658 tty->low_latency = 1; 659 660 /* send an open port command */ 661 retval = firm_open(port); 662 if (retval) { 663 stop_command_port(port->serial); 664 goto exit; 665 } 666 667 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX); 668 if (retval) { 669 firm_close(port); 670 stop_command_port(port->serial); 671 goto exit; 672 } 673 674 if (tty) { 675 old_term.c_cflag = ~tty->termios->c_cflag; 676 old_term.c_iflag = ~tty->termios->c_iflag; 677 whiteheat_set_termios(tty, port, &old_term); 678 } 679 680 /* Work around HCD bugs */ 681 usb_clear_halt(port->serial->dev, port->read_urb->pipe); 682 usb_clear_halt(port->serial->dev, port->write_urb->pipe); 683 684 /* Start reading from the device */ 685 retval = start_port_read(port); 686 if (retval) { 687 err("%s - failed submitting read urb, error %d", 688 __func__, retval); 689 firm_close(port); 690 stop_command_port(port->serial); 691 goto exit; 692 } 693 694exit: 695 dbg("%s - exit, retval = %d", __func__, retval); 696 return retval; 697} 698 699 700static void whiteheat_close(struct tty_struct *tty, 701 struct usb_serial_port *port, struct file *filp) 702{ 703 struct whiteheat_private *info = usb_get_serial_port_data(port); 704 struct whiteheat_urb_wrap *wrap; 705 struct urb *urb; 706 struct list_head *tmp; 707 struct list_head *tmp2; 708 709 dbg("%s - port %d", __func__, port->number); 710 711 mutex_lock(&port->serial->disc_mutex); 712 /* filp is NULL when called from usb_serial_disconnect */ 713 if ((filp && (tty_hung_up_p(filp))) || port->serial->disconnected) { 714 mutex_unlock(&port->serial->disc_mutex); 715 return; 716 } 717 mutex_unlock(&port->serial->disc_mutex); 718 719 tty->closing = 1; 720 721/* 722 * Not currently in use; tty_wait_until_sent() calls 723 * serial_chars_in_buffer() which deadlocks on the second semaphore 724 * acquisition. This should be fixed at some point. Greg's been 725 * notified. 726 if ((filp->f_flags & (O_NDELAY | O_NONBLOCK)) == 0) { 727 tty_wait_until_sent(tty, CLOSING_DELAY); 728 } 729*/ 730 731 tty_driver_flush_buffer(tty); 732 tty_ldisc_flush(tty); 733 734 firm_report_tx_done(port); 735 736 firm_close(port); 737 738 /* shutdown our bulk reads and writes */ 739 mutex_lock(&info->deathwarrant); 740 spin_lock_irq(&info->lock); 741 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 742 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 743 urb = wrap->urb; 744 list_del(tmp); 745 spin_unlock_irq(&info->lock); 746 usb_kill_urb(urb); 747 spin_lock_irq(&info->lock); 748 list_add(tmp, &info->rx_urbs_free); 749 } 750 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) 751 list_move(tmp, &info->rx_urbs_free); 752 list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) { 753 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 754 urb = wrap->urb; 755 list_del(tmp); 756 spin_unlock_irq(&info->lock); 757 usb_kill_urb(urb); 758 spin_lock_irq(&info->lock); 759 list_add(tmp, &info->tx_urbs_free); 760 } 761 spin_unlock_irq(&info->lock); 762 mutex_unlock(&info->deathwarrant); 763 764 stop_command_port(port->serial); 765 766 tty->closing = 0; 767} 768 769 770static int whiteheat_write(struct tty_struct *tty, 771 struct usb_serial_port *port, const unsigned char *buf, int count) 772{ 773 struct usb_serial *serial = port->serial; 774 struct whiteheat_private *info = usb_get_serial_port_data(port); 775 struct whiteheat_urb_wrap *wrap; 776 struct urb *urb; 777 int result; 778 int bytes; 779 int sent = 0; 780 unsigned long flags; 781 struct list_head *tmp; 782 783 dbg("%s - port %d", __func__, port->number); 784 785 if (count == 0) { 786 dbg("%s - write request of 0 bytes", __func__); 787 return (0); 788 } 789 790 while (count) { 791 spin_lock_irqsave(&info->lock, flags); 792 if (list_empty(&info->tx_urbs_free)) { 793 spin_unlock_irqrestore(&info->lock, flags); 794 break; 795 } 796 tmp = list_first(&info->tx_urbs_free); 797 list_del(tmp); 798 spin_unlock_irqrestore(&info->lock, flags); 799 800 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 801 urb = wrap->urb; 802 bytes = (count > port->bulk_out_size) ? 803 port->bulk_out_size : count; 804 memcpy(urb->transfer_buffer, buf + sent, bytes); 805 806 usb_serial_debug_data(debug, &port->dev, 807 __func__, bytes, urb->transfer_buffer); 808 809 urb->dev = serial->dev; 810 urb->transfer_buffer_length = bytes; 811 result = usb_submit_urb(urb, GFP_ATOMIC); 812 if (result) { 813 err("%s - failed submitting write urb, error %d", 814 __func__, result); 815 sent = result; 816 spin_lock_irqsave(&info->lock, flags); 817 list_add(tmp, &info->tx_urbs_free); 818 spin_unlock_irqrestore(&info->lock, flags); 819 break; 820 } else { 821 sent += bytes; 822 count -= bytes; 823 spin_lock_irqsave(&info->lock, flags); 824 list_add(tmp, &info->tx_urbs_submitted); 825 spin_unlock_irqrestore(&info->lock, flags); 826 } 827 } 828 829 return sent; 830} 831 832static int whiteheat_write_room(struct tty_struct *tty) 833{ 834 struct usb_serial_port *port = tty->driver_data; 835 struct whiteheat_private *info = usb_get_serial_port_data(port); 836 struct list_head *tmp; 837 int room = 0; 838 unsigned long flags; 839 840 dbg("%s - port %d", __func__, port->number); 841 842 spin_lock_irqsave(&info->lock, flags); 843 list_for_each(tmp, &info->tx_urbs_free) 844 room++; 845 spin_unlock_irqrestore(&info->lock, flags); 846 room *= port->bulk_out_size; 847 848 dbg("%s - returns %d", __func__, room); 849 return (room); 850} 851 852static int whiteheat_tiocmget(struct tty_struct *tty, struct file *file) 853{ 854 struct usb_serial_port *port = tty->driver_data; 855 struct whiteheat_private *info = usb_get_serial_port_data(port); 856 unsigned int modem_signals = 0; 857 858 dbg("%s - port %d", __func__, port->number); 859 860 firm_get_dtr_rts(port); 861 if (info->mcr & UART_MCR_DTR) 862 modem_signals |= TIOCM_DTR; 863 if (info->mcr & UART_MCR_RTS) 864 modem_signals |= TIOCM_RTS; 865 866 return modem_signals; 867} 868 869static int whiteheat_tiocmset(struct tty_struct *tty, struct file *file, 870 unsigned int set, unsigned int clear) 871{ 872 struct usb_serial_port *port = tty->driver_data; 873 struct whiteheat_private *info = usb_get_serial_port_data(port); 874 875 dbg("%s - port %d", __func__, port->number); 876 877 if (set & TIOCM_RTS) 878 info->mcr |= UART_MCR_RTS; 879 if (set & TIOCM_DTR) 880 info->mcr |= UART_MCR_DTR; 881 882 if (clear & TIOCM_RTS) 883 info->mcr &= ~UART_MCR_RTS; 884 if (clear & TIOCM_DTR) 885 info->mcr &= ~UART_MCR_DTR; 886 887 firm_set_dtr(port, info->mcr & UART_MCR_DTR); 888 firm_set_rts(port, info->mcr & UART_MCR_RTS); 889 return 0; 890} 891 892 893static int whiteheat_ioctl(struct tty_struct *tty, struct file *file, 894 unsigned int cmd, unsigned long arg) 895{ 896 struct usb_serial_port *port = tty->driver_data; 897 struct serial_struct serstruct; 898 void __user *user_arg = (void __user *)arg; 899 900 dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); 901 902 switch (cmd) { 903 case TIOCGSERIAL: 904 memset(&serstruct, 0, sizeof(serstruct)); 905 serstruct.type = PORT_16654; 906 serstruct.line = port->serial->minor; 907 serstruct.port = port->number; 908 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 909 serstruct.xmit_fifo_size = port->bulk_out_size; 910 serstruct.custom_divisor = 0; 911 serstruct.baud_base = 460800; 912 serstruct.close_delay = CLOSING_DELAY; 913 serstruct.closing_wait = CLOSING_DELAY; 914 915 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct))) 916 return -EFAULT; 917 break; 918 default: 919 break; 920 } 921 922 return -ENOIOCTLCMD; 923} 924 925 926static void whiteheat_set_termios(struct tty_struct *tty, 927 struct usb_serial_port *port, struct ktermios *old_termios) 928{ 929 /* FIXME */ 930 firm_setup_port(tty); 931} 932 933static void whiteheat_break_ctl(struct tty_struct *tty, int break_state) 934{ 935 struct usb_serial_port *port = tty->driver_data; 936 firm_set_break(port, break_state); 937} 938 939 940static int whiteheat_chars_in_buffer(struct tty_struct *tty) 941{ 942 struct usb_serial_port *port = tty->driver_data; 943 struct whiteheat_private *info = usb_get_serial_port_data(port); 944 struct list_head *tmp; 945 struct whiteheat_urb_wrap *wrap; 946 int chars = 0; 947 unsigned long flags; 948 949 dbg("%s - port %d", __func__, port->number); 950 951 spin_lock_irqsave(&info->lock, flags); 952 list_for_each(tmp, &info->tx_urbs_submitted) { 953 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 954 chars += wrap->urb->transfer_buffer_length; 955 } 956 spin_unlock_irqrestore(&info->lock, flags); 957 958 dbg("%s - returns %d", __func__, chars); 959 return chars; 960} 961 962 963static void whiteheat_throttle(struct tty_struct *tty) 964{ 965 struct usb_serial_port *port = tty->driver_data; 966 struct whiteheat_private *info = usb_get_serial_port_data(port); 967 unsigned long flags; 968 969 dbg("%s - port %d", __func__, port->number); 970 971 spin_lock_irqsave(&info->lock, flags); 972 info->flags |= THROTTLED; 973 spin_unlock_irqrestore(&info->lock, flags); 974 975 return; 976} 977 978 979static void whiteheat_unthrottle(struct tty_struct *tty) 980{ 981 struct usb_serial_port *port = tty->driver_data; 982 struct whiteheat_private *info = usb_get_serial_port_data(port); 983 int actually_throttled; 984 unsigned long flags; 985 986 dbg("%s - port %d", __func__, port->number); 987 988 spin_lock_irqsave(&info->lock, flags); 989 actually_throttled = info->flags & ACTUALLY_THROTTLED; 990 info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED); 991 spin_unlock_irqrestore(&info->lock, flags); 992 993 if (actually_throttled) 994 rx_data_softint(&info->rx_work); 995 996 return; 997} 998 999 1000/***************************************************************************** 1001 * Connect Tech's White Heat callback routines 1002 *****************************************************************************/ 1003static void command_port_write_callback(struct urb *urb) 1004{ 1005 int status = urb->status; 1006 1007 dbg("%s", __func__); 1008 1009 if (status) { 1010 dbg("nonzero urb status: %d", status); 1011 return; 1012 } 1013} 1014 1015 1016static void command_port_read_callback(struct urb *urb) 1017{ 1018 struct usb_serial_port *command_port = urb->context; 1019 struct whiteheat_command_private *command_info; 1020 int status = urb->status; 1021 unsigned char *data = urb->transfer_buffer; 1022 int result; 1023 1024 dbg("%s", __func__); 1025 1026 command_info = usb_get_serial_port_data(command_port); 1027 if (!command_info) { 1028 dbg("%s - command_info is NULL, exiting.", __func__); 1029 return; 1030 } 1031 if (status) { 1032 dbg("%s - nonzero urb status: %d", __func__, status); 1033 if (status != -ENOENT) 1034 command_info->command_finished = WHITEHEAT_CMD_FAILURE; 1035 wake_up(&command_info->wait_command); 1036 return; 1037 } 1038 1039 usb_serial_debug_data(debug, &command_port->dev, 1040 __func__, urb->actual_length, data); 1041 1042 if (data[0] == WHITEHEAT_CMD_COMPLETE) { 1043 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 1044 wake_up(&command_info->wait_command); 1045 } else if (data[0] == WHITEHEAT_CMD_FAILURE) { 1046 command_info->command_finished = WHITEHEAT_CMD_FAILURE; 1047 wake_up(&command_info->wait_command); 1048 } else if (data[0] == WHITEHEAT_EVENT) { 1049 /* These are unsolicited reports from the firmware, hence no 1050 waiting command to wakeup */ 1051 dbg("%s - event received", __func__); 1052 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) { 1053 memcpy(command_info->result_buffer, &data[1], 1054 urb->actual_length - 1); 1055 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 1056 wake_up(&command_info->wait_command); 1057 } else 1058 dbg("%s - bad reply from firmware", __func__); 1059 1060 /* Continue trying to always read */ 1061 command_port->read_urb->dev = command_port->serial->dev; 1062 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC); 1063 if (result) 1064 dbg("%s - failed resubmitting read urb, error %d", 1065 __func__, result); 1066} 1067 1068 1069static void whiteheat_read_callback(struct urb *urb) 1070{ 1071 struct usb_serial_port *port = urb->context; 1072 struct whiteheat_urb_wrap *wrap; 1073 unsigned char *data = urb->transfer_buffer; 1074 struct whiteheat_private *info = usb_get_serial_port_data(port); 1075 int status = urb->status; 1076 1077 dbg("%s - port %d", __func__, port->number); 1078 1079 spin_lock(&info->lock); 1080 wrap = urb_to_wrap(urb, &info->rx_urbs_submitted); 1081 if (!wrap) { 1082 spin_unlock(&info->lock); 1083 err("%s - Not my urb!", __func__); 1084 return; 1085 } 1086 list_del(&wrap->list); 1087 spin_unlock(&info->lock); 1088 1089 if (status) { 1090 dbg("%s - nonzero read bulk status received: %d", 1091 __func__, status); 1092 spin_lock(&info->lock); 1093 list_add(&wrap->list, &info->rx_urbs_free); 1094 spin_unlock(&info->lock); 1095 return; 1096 } 1097 1098 usb_serial_debug_data(debug, &port->dev, 1099 __func__, urb->actual_length, data); 1100 1101 spin_lock(&info->lock); 1102 list_add_tail(&wrap->list, &info->rx_urb_q); 1103 if (info->flags & THROTTLED) { 1104 info->flags |= ACTUALLY_THROTTLED; 1105 spin_unlock(&info->lock); 1106 return; 1107 } 1108 spin_unlock(&info->lock); 1109 1110 schedule_work(&info->rx_work); 1111} 1112 1113 1114static void whiteheat_write_callback(struct urb *urb) 1115{ 1116 struct usb_serial_port *port = urb->context; 1117 struct whiteheat_private *info = usb_get_serial_port_data(port); 1118 struct whiteheat_urb_wrap *wrap; 1119 int status = urb->status; 1120 1121 dbg("%s - port %d", __func__, port->number); 1122 1123 spin_lock(&info->lock); 1124 wrap = urb_to_wrap(urb, &info->tx_urbs_submitted); 1125 if (!wrap) { 1126 spin_unlock(&info->lock); 1127 err("%s - Not my urb!", __func__); 1128 return; 1129 } 1130 list_move(&wrap->list, &info->tx_urbs_free); 1131 spin_unlock(&info->lock); 1132 1133 if (status) { 1134 dbg("%s - nonzero write bulk status received: %d", 1135 __func__, status); 1136 return; 1137 } 1138 1139 usb_serial_port_softint(port); 1140} 1141 1142 1143/***************************************************************************** 1144 * Connect Tech's White Heat firmware interface 1145 *****************************************************************************/ 1146static int firm_send_command(struct usb_serial_port *port, __u8 command, 1147 __u8 *data, __u8 datasize) 1148{ 1149 struct usb_serial_port *command_port; 1150 struct whiteheat_command_private *command_info; 1151 struct whiteheat_private *info; 1152 __u8 *transfer_buffer; 1153 int retval = 0; 1154 int t; 1155 1156 dbg("%s - command %d", __func__, command); 1157 1158 command_port = port->serial->port[COMMAND_PORT]; 1159 command_info = usb_get_serial_port_data(command_port); 1160 mutex_lock(&command_info->mutex); 1161 command_info->command_finished = false; 1162 1163 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer; 1164 transfer_buffer[0] = command; 1165 memcpy(&transfer_buffer[1], data, datasize); 1166 command_port->write_urb->transfer_buffer_length = datasize + 1; 1167 command_port->write_urb->dev = port->serial->dev; 1168 retval = usb_submit_urb(command_port->write_urb, GFP_NOIO); 1169 if (retval) { 1170 dbg("%s - submit urb failed", __func__); 1171 goto exit; 1172 } 1173 1174 /* wait for the command to complete */ 1175 t = wait_event_timeout(command_info->wait_command, 1176 (bool)command_info->command_finished, COMMAND_TIMEOUT); 1177 if (!t) 1178 usb_kill_urb(command_port->write_urb); 1179 1180 if (command_info->command_finished == false) { 1181 dbg("%s - command timed out.", __func__); 1182 retval = -ETIMEDOUT; 1183 goto exit; 1184 } 1185 1186 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) { 1187 dbg("%s - command failed.", __func__); 1188 retval = -EIO; 1189 goto exit; 1190 } 1191 1192 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) { 1193 dbg("%s - command completed.", __func__); 1194 switch (command) { 1195 case WHITEHEAT_GET_DTR_RTS: 1196 info = usb_get_serial_port_data(port); 1197 memcpy(&info->mcr, command_info->result_buffer, 1198 sizeof(struct whiteheat_dr_info)); 1199 break; 1200 } 1201 } 1202exit: 1203 mutex_unlock(&command_info->mutex); 1204 return retval; 1205} 1206 1207 1208static int firm_open(struct usb_serial_port *port) 1209{ 1210 struct whiteheat_simple open_command; 1211 1212 open_command.port = port->number - port->serial->minor + 1; 1213 return firm_send_command(port, WHITEHEAT_OPEN, 1214 (__u8 *)&open_command, sizeof(open_command)); 1215} 1216 1217 1218static int firm_close(struct usb_serial_port *port) 1219{ 1220 struct whiteheat_simple close_command; 1221 1222 close_command.port = port->number - port->serial->minor + 1; 1223 return firm_send_command(port, WHITEHEAT_CLOSE, 1224 (__u8 *)&close_command, sizeof(close_command)); 1225} 1226 1227 1228static int firm_setup_port(struct tty_struct *tty) 1229{ 1230 struct usb_serial_port *port = tty->driver_data; 1231 struct whiteheat_port_settings port_settings; 1232 unsigned int cflag = tty->termios->c_cflag; 1233 1234 port_settings.port = port->number + 1; 1235 1236 /* get the byte size */ 1237 switch (cflag & CSIZE) { 1238 case CS5: port_settings.bits = 5; break; 1239 case CS6: port_settings.bits = 6; break; 1240 case CS7: port_settings.bits = 7; break; 1241 default: 1242 case CS8: port_settings.bits = 8; break; 1243 } 1244 dbg("%s - data bits = %d", __func__, port_settings.bits); 1245 1246 /* determine the parity */ 1247 if (cflag & PARENB) 1248 if (cflag & CMSPAR) 1249 if (cflag & PARODD) 1250 port_settings.parity = WHITEHEAT_PAR_MARK; 1251 else 1252 port_settings.parity = WHITEHEAT_PAR_SPACE; 1253 else 1254 if (cflag & PARODD) 1255 port_settings.parity = WHITEHEAT_PAR_ODD; 1256 else 1257 port_settings.parity = WHITEHEAT_PAR_EVEN; 1258 else 1259 port_settings.parity = WHITEHEAT_PAR_NONE; 1260 dbg("%s - parity = %c", __func__, port_settings.parity); 1261 1262 /* figure out the stop bits requested */ 1263 if (cflag & CSTOPB) 1264 port_settings.stop = 2; 1265 else 1266 port_settings.stop = 1; 1267 dbg("%s - stop bits = %d", __func__, port_settings.stop); 1268 1269 /* figure out the flow control settings */ 1270 if (cflag & CRTSCTS) 1271 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | 1272 WHITEHEAT_HFLOW_RTS); 1273 else 1274 port_settings.hflow = WHITEHEAT_HFLOW_NONE; 1275 dbg("%s - hardware flow control = %s %s %s %s", __func__, 1276 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "", 1277 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "", 1278 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "", 1279 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : ""); 1280 1281 /* determine software flow control */ 1282 if (I_IXOFF(tty)) 1283 port_settings.sflow = WHITEHEAT_SFLOW_RXTX; 1284 else 1285 port_settings.sflow = WHITEHEAT_SFLOW_NONE; 1286 dbg("%s - software flow control = %c", __func__, port_settings.sflow); 1287 1288 port_settings.xon = START_CHAR(tty); 1289 port_settings.xoff = STOP_CHAR(tty); 1290 dbg("%s - XON = %2x, XOFF = %2x", 1291 __func__, port_settings.xon, port_settings.xoff); 1292 1293 /* get the baud rate wanted */ 1294 port_settings.baud = tty_get_baud_rate(tty); 1295 dbg("%s - baud rate = %d", __func__, port_settings.baud); 1296 1297 /* fixme: should set validated settings */ 1298 tty_encode_baud_rate(tty, port_settings.baud, port_settings.baud); 1299 /* handle any settings that aren't specified in the tty structure */ 1300 port_settings.lloop = 0; 1301 1302 /* now send the message to the device */ 1303 return firm_send_command(port, WHITEHEAT_SETUP_PORT, 1304 (__u8 *)&port_settings, sizeof(port_settings)); 1305} 1306 1307 1308static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) 1309{ 1310 struct whiteheat_set_rdb rts_command; 1311 1312 rts_command.port = port->number - port->serial->minor + 1; 1313 rts_command.state = onoff; 1314 return firm_send_command(port, WHITEHEAT_SET_RTS, 1315 (__u8 *)&rts_command, sizeof(rts_command)); 1316} 1317 1318 1319static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) 1320{ 1321 struct whiteheat_set_rdb dtr_command; 1322 1323 dtr_command.port = port->number - port->serial->minor + 1; 1324 dtr_command.state = onoff; 1325 return firm_send_command(port, WHITEHEAT_SET_RTS, 1326 (__u8 *)&dtr_command, sizeof(dtr_command)); 1327} 1328 1329 1330static int firm_set_break(struct usb_serial_port *port, __u8 onoff) 1331{ 1332 struct whiteheat_set_rdb break_command; 1333 1334 break_command.port = port->number - port->serial->minor + 1; 1335 break_command.state = onoff; 1336 return firm_send_command(port, WHITEHEAT_SET_RTS, 1337 (__u8 *)&break_command, sizeof(break_command)); 1338} 1339 1340 1341static int firm_purge(struct usb_serial_port *port, __u8 rxtx) 1342{ 1343 struct whiteheat_purge purge_command; 1344 1345 purge_command.port = port->number - port->serial->minor + 1; 1346 purge_command.what = rxtx; 1347 return firm_send_command(port, WHITEHEAT_PURGE, 1348 (__u8 *)&purge_command, sizeof(purge_command)); 1349} 1350 1351 1352static int firm_get_dtr_rts(struct usb_serial_port *port) 1353{ 1354 struct whiteheat_simple get_dr_command; 1355 1356 get_dr_command.port = port->number - port->serial->minor + 1; 1357 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, 1358 (__u8 *)&get_dr_command, sizeof(get_dr_command)); 1359} 1360 1361 1362static int firm_report_tx_done(struct usb_serial_port *port) 1363{ 1364 struct whiteheat_simple close_command; 1365 1366 close_command.port = port->number - port->serial->minor + 1; 1367 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, 1368 (__u8 *)&close_command, sizeof(close_command)); 1369} 1370 1371 1372/***************************************************************************** 1373 * Connect Tech's White Heat utility functions 1374 *****************************************************************************/ 1375static int start_command_port(struct usb_serial *serial) 1376{ 1377 struct usb_serial_port *command_port; 1378 struct whiteheat_command_private *command_info; 1379 int retval = 0; 1380 1381 command_port = serial->port[COMMAND_PORT]; 1382 command_info = usb_get_serial_port_data(command_port); 1383 mutex_lock(&command_info->mutex); 1384 if (!command_info->port_running) { 1385 /* Work around HCD bugs */ 1386 usb_clear_halt(serial->dev, command_port->read_urb->pipe); 1387 1388 command_port->read_urb->dev = serial->dev; 1389 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL); 1390 if (retval) { 1391 err("%s - failed submitting read urb, error %d", 1392 __func__, retval); 1393 goto exit; 1394 } 1395 } 1396 command_info->port_running++; 1397 1398exit: 1399 mutex_unlock(&command_info->mutex); 1400 return retval; 1401} 1402 1403 1404static void stop_command_port(struct usb_serial *serial) 1405{ 1406 struct usb_serial_port *command_port; 1407 struct whiteheat_command_private *command_info; 1408 1409 command_port = serial->port[COMMAND_PORT]; 1410 command_info = usb_get_serial_port_data(command_port); 1411 mutex_lock(&command_info->mutex); 1412 command_info->port_running--; 1413 if (!command_info->port_running) 1414 usb_kill_urb(command_port->read_urb); 1415 mutex_unlock(&command_info->mutex); 1416} 1417 1418 1419static int start_port_read(struct usb_serial_port *port) 1420{ 1421 struct whiteheat_private *info = usb_get_serial_port_data(port); 1422 struct whiteheat_urb_wrap *wrap; 1423 struct urb *urb; 1424 int retval = 0; 1425 unsigned long flags; 1426 struct list_head *tmp; 1427 struct list_head *tmp2; 1428 1429 spin_lock_irqsave(&info->lock, flags); 1430 1431 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 1432 list_del(tmp); 1433 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1434 urb = wrap->urb; 1435 urb->dev = port->serial->dev; 1436 spin_unlock_irqrestore(&info->lock, flags); 1437 retval = usb_submit_urb(urb, GFP_KERNEL); 1438 if (retval) { 1439 spin_lock_irqsave(&info->lock, flags); 1440 list_add(tmp, &info->rx_urbs_free); 1441 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 1442 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1443 urb = wrap->urb; 1444 list_del(tmp); 1445 spin_unlock_irqrestore(&info->lock, flags); 1446 usb_kill_urb(urb); 1447 spin_lock_irqsave(&info->lock, flags); 1448 list_add(tmp, &info->rx_urbs_free); 1449 } 1450 break; 1451 } 1452 spin_lock_irqsave(&info->lock, flags); 1453 list_add(tmp, &info->rx_urbs_submitted); 1454 } 1455 1456 spin_unlock_irqrestore(&info->lock, flags); 1457 1458 return retval; 1459} 1460 1461 1462static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, 1463 struct list_head *head) 1464{ 1465 struct whiteheat_urb_wrap *wrap; 1466 struct list_head *tmp; 1467 1468 list_for_each(tmp, head) { 1469 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1470 if (wrap->urb == urb) 1471 return wrap; 1472 } 1473 1474 return NULL; 1475} 1476 1477 1478static struct list_head *list_first(struct list_head *head) 1479{ 1480 return head->next; 1481} 1482 1483 1484static void rx_data_softint(struct work_struct *work) 1485{ 1486 struct whiteheat_private *info = 1487 container_of(work, struct whiteheat_private, rx_work); 1488 struct usb_serial_port *port = info->port; 1489 struct tty_struct *tty = port->port.tty; 1490 struct whiteheat_urb_wrap *wrap; 1491 struct urb *urb; 1492 unsigned long flags; 1493 struct list_head *tmp; 1494 struct list_head *tmp2; 1495 int result; 1496 int sent = 0; 1497 1498 spin_lock_irqsave(&info->lock, flags); 1499 if (info->flags & THROTTLED) { 1500 spin_unlock_irqrestore(&info->lock, flags); 1501 return; 1502 } 1503 1504 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) { 1505 list_del(tmp); 1506 spin_unlock_irqrestore(&info->lock, flags); 1507 1508 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1509 urb = wrap->urb; 1510 1511 if (tty && urb->actual_length) { 1512 int len = tty_buffer_request_room(tty, 1513 urb->actual_length); 1514 /* This stuff can go away now I suspect */ 1515 if (unlikely(len < urb->actual_length)) { 1516 spin_lock_irqsave(&info->lock, flags); 1517 list_add(tmp, &info->rx_urb_q); 1518 spin_unlock_irqrestore(&info->lock, flags); 1519 tty_flip_buffer_push(tty); 1520 schedule_work(&info->rx_work); 1521 return; 1522 } 1523 tty_insert_flip_string(tty, urb->transfer_buffer, len); 1524 sent += len; 1525 } 1526 1527 urb->dev = port->serial->dev; 1528 result = usb_submit_urb(urb, GFP_ATOMIC); 1529 if (result) { 1530 err("%s - failed resubmitting read urb, error %d", 1531 __func__, result); 1532 spin_lock_irqsave(&info->lock, flags); 1533 list_add(tmp, &info->rx_urbs_free); 1534 continue; 1535 } 1536 1537 spin_lock_irqsave(&info->lock, flags); 1538 list_add(tmp, &info->rx_urbs_submitted); 1539 } 1540 spin_unlock_irqrestore(&info->lock, flags); 1541 1542 if (sent) 1543 tty_flip_buffer_push(tty); 1544} 1545 1546 1547/***************************************************************************** 1548 * Connect Tech's White Heat module functions 1549 *****************************************************************************/ 1550static int __init whiteheat_init(void) 1551{ 1552 int retval; 1553 retval = usb_serial_register(&whiteheat_fake_device); 1554 if (retval) 1555 goto failed_fake_register; 1556 retval = usb_serial_register(&whiteheat_device); 1557 if (retval) 1558 goto failed_device_register; 1559 retval = usb_register(&whiteheat_driver); 1560 if (retval) 1561 goto failed_usb_register; 1562 info(DRIVER_DESC " " DRIVER_VERSION); 1563 return 0; 1564failed_usb_register: 1565 usb_serial_deregister(&whiteheat_device); 1566failed_device_register: 1567 usb_serial_deregister(&whiteheat_fake_device); 1568failed_fake_register: 1569 return retval; 1570} 1571 1572 1573static void __exit whiteheat_exit(void) 1574{ 1575 usb_deregister(&whiteheat_driver); 1576 usb_serial_deregister(&whiteheat_fake_device); 1577 usb_serial_deregister(&whiteheat_device); 1578} 1579 1580 1581module_init(whiteheat_init); 1582module_exit(whiteheat_exit); 1583 1584MODULE_AUTHOR(DRIVER_AUTHOR); 1585MODULE_DESCRIPTION(DRIVER_DESC); 1586MODULE_LICENSE("GPL"); 1587 1588MODULE_FIRMWARE("whiteheat.fw"); 1589MODULE_FIRMWARE("whiteheat_loader.fw"); 1590 1591module_param(urb_pool_size, int, 0); 1592MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering"); 1593 1594module_param(debug, bool, S_IRUGO | S_IWUSR); 1595MODULE_PARM_DESC(debug, "Debug enabled or not"); 1596