whiteheat.c revision 9a64f251326154dcd40b21a6980fe2ab9537dde7
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 driver 16 * 17 * (10/09/2002) Stuart MacDonald (stuartm@connecttech.com) 18 * Upgrade to full working driver 19 * 20 * (05/30/2001) gkh 21 * switched from using spinlock to a semaphore, which fixes lots of problems. 22 * 23 * (04/08/2001) gb 24 * Identify version on module load. 25 * 26 * 2001_Mar_19 gkh 27 * Fixed MOD_INC and MOD_DEC logic, the ability to open a port more 28 * than once, and the got the proper usb_device_id table entries so 29 * the driver works again. 30 * 31 * (11/01/2000) Adam J. Richter 32 * usb_device_id table support 33 * 34 * (10/05/2000) gkh 35 * Fixed bug with urb->dev not being set properly, now that the usb 36 * core needs it. 37 * 38 * (10/03/2000) smd 39 * firmware is improved to guard against crap sent to device 40 * firmware now replies CMD_FAILURE on bad things 41 * read_callback fix you provided for private info struct 42 * command_finished now indicates success or fail 43 * setup_port struct now packed to avoid gcc padding 44 * firmware uses 1 based port numbering, driver now handles that 45 * 46 * (09/11/2000) gkh 47 * Removed DEBUG #ifdefs with call to usb_serial_debug_data 48 * 49 * (07/19/2000) gkh 50 * Added module_init and module_exit functions to handle the fact that this 51 * driver is a loadable module now. 52 * Fixed bug with port->minor that was found by Al Borchers 53 * 54 * (07/04/2000) gkh 55 * Added support for port settings. Baud rate can now be changed. Line signals 56 * are not transferred to and from the tty layer yet, but things seem to be 57 * working well now. 58 * 59 * (05/04/2000) gkh 60 * First cut at open and close commands. Data can flow through the ports at 61 * default speeds now. 62 * 63 * (03/26/2000) gkh 64 * Split driver up into device specific pieces. 65 * 66 */ 67 68#include <linux/kernel.h> 69#include <linux/errno.h> 70#include <linux/init.h> 71#include <linux/slab.h> 72#include <linux/tty.h> 73#include <linux/tty_driver.h> 74#include <linux/tty_flip.h> 75#include <linux/module.h> 76#include <linux/spinlock.h> 77#include <linux/mutex.h> 78#include <asm/uaccess.h> 79#include <asm/termbits.h> 80#include <linux/usb.h> 81#include <linux/serial_reg.h> 82#include <linux/serial.h> 83#include <linux/usb/serial.h> 84#include "whiteheat_fw.h" /* firmware for the ConnectTech WhiteHEAT device */ 85#include "whiteheat.h" /* WhiteHEAT specific commands */ 86 87static int debug; 88 89#ifndef CMSPAR 90#define CMSPAR 0 91#endif 92 93/* 94 * Version Information 95 */ 96#define DRIVER_VERSION "v2.0" 97#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>" 98#define DRIVER_DESC "USB ConnectTech WhiteHEAT driver" 99 100#define CONNECT_TECH_VENDOR_ID 0x0710 101#define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001 102#define CONNECT_TECH_WHITE_HEAT_ID 0x8001 103 104/* 105 ID tables for whiteheat are unusual, because we want to different 106 things for different versions of the device. Eventually, this 107 will be doable from a single table. But, for now, we define two 108 separate ID tables, and then a third table that combines them 109 just for the purpose of exporting the autoloading information. 110*/ 111static struct usb_device_id id_table_std [] = { 112 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) }, 113 { } /* Terminating entry */ 114}; 115 116static struct usb_device_id id_table_prerenumeration [] = { 117 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) }, 118 { } /* Terminating entry */ 119}; 120 121static struct usb_device_id id_table_combined [] = { 122 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) }, 123 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) }, 124 { } /* Terminating entry */ 125}; 126 127MODULE_DEVICE_TABLE (usb, id_table_combined); 128 129static struct usb_driver whiteheat_driver = { 130 .name = "whiteheat", 131 .probe = usb_serial_probe, 132 .disconnect = usb_serial_disconnect, 133 .id_table = id_table_combined, 134 .no_dynamic_id = 1, 135}; 136 137/* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */ 138static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id); 139static int whiteheat_firmware_attach (struct usb_serial *serial); 140 141/* function prototypes for the Connect Tech WhiteHEAT serial converter */ 142static int whiteheat_attach (struct usb_serial *serial); 143static void whiteheat_shutdown (struct usb_serial *serial); 144static int whiteheat_open (struct usb_serial_port *port, struct file *filp); 145static void whiteheat_close (struct usb_serial_port *port, struct file *filp); 146static int whiteheat_write (struct usb_serial_port *port, const unsigned char *buf, int count); 147static int whiteheat_write_room (struct usb_serial_port *port); 148static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg); 149static void whiteheat_set_termios (struct usb_serial_port *port, struct ktermios * old); 150static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file); 151static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear); 152static void whiteheat_break_ctl (struct usb_serial_port *port, int break_state); 153static int whiteheat_chars_in_buffer (struct usb_serial_port *port); 154static void whiteheat_throttle (struct usb_serial_port *port); 155static void whiteheat_unthrottle (struct usb_serial_port *port); 156static void whiteheat_read_callback (struct urb *urb); 157static void whiteheat_write_callback (struct urb *urb); 158 159static struct usb_serial_driver whiteheat_fake_device = { 160 .driver = { 161 .owner = THIS_MODULE, 162 .name = "whiteheatnofirm", 163 }, 164 .description = "Connect Tech - WhiteHEAT - (prerenumeration)", 165 .usb_driver = &whiteheat_driver, 166 .id_table = id_table_prerenumeration, 167 .num_interrupt_in = NUM_DONT_CARE, 168 .num_bulk_in = NUM_DONT_CARE, 169 .num_bulk_out = NUM_DONT_CARE, 170 .num_ports = 1, 171 .probe = whiteheat_firmware_download, 172 .attach = whiteheat_firmware_attach, 173}; 174 175static struct usb_serial_driver whiteheat_device = { 176 .driver = { 177 .owner = THIS_MODULE, 178 .name = "whiteheat", 179 }, 180 .description = "Connect Tech - WhiteHEAT", 181 .usb_driver = &whiteheat_driver, 182 .id_table = id_table_std, 183 .num_interrupt_in = NUM_DONT_CARE, 184 .num_bulk_in = NUM_DONT_CARE, 185 .num_bulk_out = NUM_DONT_CARE, 186 .num_ports = 4, 187 .attach = whiteheat_attach, 188 .shutdown = whiteheat_shutdown, 189 .open = whiteheat_open, 190 .close = whiteheat_close, 191 .write = whiteheat_write, 192 .write_room = whiteheat_write_room, 193 .ioctl = whiteheat_ioctl, 194 .set_termios = whiteheat_set_termios, 195 .break_ctl = whiteheat_break_ctl, 196 .tiocmget = whiteheat_tiocmget, 197 .tiocmset = whiteheat_tiocmset, 198 .chars_in_buffer = whiteheat_chars_in_buffer, 199 .throttle = whiteheat_throttle, 200 .unthrottle = whiteheat_unthrottle, 201 .read_bulk_callback = whiteheat_read_callback, 202 .write_bulk_callback = whiteheat_write_callback, 203}; 204 205 206struct whiteheat_command_private { 207 struct mutex mutex; 208 __u8 port_running; 209 __u8 command_finished; 210 wait_queue_head_t wait_command; /* for handling sleeping while waiting for a command to finish */ 211 __u8 result_buffer[64]; 212}; 213 214 215#define THROTTLED 0x01 216#define ACTUALLY_THROTTLED 0x02 217 218static int urb_pool_size = 8; 219 220struct whiteheat_urb_wrap { 221 struct list_head list; 222 struct urb *urb; 223}; 224 225struct whiteheat_private { 226 spinlock_t lock; 227 __u8 flags; 228 __u8 mcr; 229 struct list_head rx_urbs_free; 230 struct list_head rx_urbs_submitted; 231 struct list_head rx_urb_q; 232 struct work_struct rx_work; 233 struct usb_serial_port *port; 234 struct list_head tx_urbs_free; 235 struct list_head tx_urbs_submitted; 236 struct mutex deathwarrant; 237}; 238 239 240/* local function prototypes */ 241static int start_command_port(struct usb_serial *serial); 242static void stop_command_port(struct usb_serial *serial); 243static void command_port_write_callback(struct urb *urb); 244static void command_port_read_callback(struct urb *urb); 245 246static int start_port_read(struct usb_serial_port *port); 247static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, struct list_head *head); 248static struct list_head *list_first(struct list_head *head); 249static void rx_data_softint(struct work_struct *work); 250 251static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize); 252static int firm_open(struct usb_serial_port *port); 253static int firm_close(struct usb_serial_port *port); 254static int firm_setup_port(struct usb_serial_port *port); 255static int firm_set_rts(struct usb_serial_port *port, __u8 onoff); 256static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff); 257static int firm_set_break(struct usb_serial_port *port, __u8 onoff); 258static int firm_purge(struct usb_serial_port *port, __u8 rxtx); 259static int firm_get_dtr_rts(struct usb_serial_port *port); 260static int firm_report_tx_done(struct usb_serial_port *port); 261 262 263#define COMMAND_PORT 4 264#define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */ 265#define COMMAND_TIMEOUT_MS 2000 266#define CLOSING_DELAY (30 * HZ) 267 268 269/***************************************************************************** 270 * Connect Tech's White Heat prerenumeration driver functions 271 *****************************************************************************/ 272 273/* steps to download the firmware to the WhiteHEAT device: 274 - hold the reset (by writing to the reset bit of the CPUCS register) 275 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD 276 - release the reset (by writing to the CPUCS register) 277 - download the WH.HEX file for all addresses greater than 0x1b3f using 278 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD 279 - hold the reset 280 - download the WH.HEX file for all addresses less than 0x1b40 using 281 VENDOR_REQUEST_ANCHOR_LOAD 282 - release the reset 283 - device renumerated itself and comes up as new device id with all 284 firmware download completed. 285*/ 286static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id) 287{ 288 int response; 289 const struct whiteheat_hex_record *record; 290 291 dbg("%s", __FUNCTION__); 292 293 response = ezusb_set_reset (serial, 1); 294 295 record = &whiteheat_loader[0]; 296 while (record->address != 0xffff) { 297 response = ezusb_writememory (serial, record->address, 298 (unsigned char *)record->data, record->data_size, 0xa0); 299 if (response < 0) { 300 err("%s - ezusb_writememory failed for loader (%d %04X %p %d)", 301 __FUNCTION__, response, record->address, record->data, record->data_size); 302 break; 303 } 304 ++record; 305 } 306 307 response = ezusb_set_reset (serial, 0); 308 309 record = &whiteheat_firmware[0]; 310 while (record->address < 0x1b40) { 311 ++record; 312 } 313 while (record->address != 0xffff) { 314 response = ezusb_writememory (serial, record->address, 315 (unsigned char *)record->data, record->data_size, 0xa3); 316 if (response < 0) { 317 err("%s - ezusb_writememory failed for first firmware step (%d %04X %p %d)", 318 __FUNCTION__, response, record->address, record->data, record->data_size); 319 break; 320 } 321 ++record; 322 } 323 324 response = ezusb_set_reset (serial, 1); 325 326 record = &whiteheat_firmware[0]; 327 while (record->address < 0x1b40) { 328 response = ezusb_writememory (serial, record->address, 329 (unsigned char *)record->data, record->data_size, 0xa0); 330 if (response < 0) { 331 err("%s - ezusb_writememory failed for second firmware step (%d %04X %p %d)", 332 __FUNCTION__, response, record->address, record->data, record->data_size); 333 break; 334 } 335 ++record; 336 } 337 338 response = ezusb_set_reset (serial, 0); 339 340 return 0; 341} 342 343 344static int whiteheat_firmware_attach (struct usb_serial *serial) 345{ 346 /* We want this device to fail to have a driver assigned to it */ 347 return 1; 348} 349 350 351/***************************************************************************** 352 * Connect Tech's White Heat serial driver functions 353 *****************************************************************************/ 354static int whiteheat_attach (struct usb_serial *serial) 355{ 356 struct usb_serial_port *command_port; 357 struct whiteheat_command_private *command_info; 358 struct usb_serial_port *port; 359 struct whiteheat_private *info; 360 struct whiteheat_hw_info *hw_info; 361 int pipe; 362 int ret; 363 int alen; 364 __u8 *command; 365 __u8 *result; 366 int i; 367 int j; 368 struct urb *urb; 369 int buf_size; 370 struct whiteheat_urb_wrap *wrap; 371 struct list_head *tmp; 372 373 command_port = serial->port[COMMAND_PORT]; 374 375 pipe = usb_sndbulkpipe (serial->dev, command_port->bulk_out_endpointAddress); 376 command = kmalloc(2, GFP_KERNEL); 377 if (!command) 378 goto no_command_buffer; 379 command[0] = WHITEHEAT_GET_HW_INFO; 380 command[1] = 0; 381 382 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL); 383 if (!result) 384 goto no_result_buffer; 385 /* 386 * When the module is reloaded the firmware is still there and 387 * the endpoints are still in the usb core unchanged. This is the 388 * unlinking bug in disguise. Same for the call below. 389 */ 390 usb_clear_halt(serial->dev, pipe); 391 ret = usb_bulk_msg (serial->dev, pipe, command, 2, &alen, COMMAND_TIMEOUT_MS); 392 if (ret) { 393 err("%s: Couldn't send command [%d]", serial->type->description, ret); 394 goto no_firmware; 395 } else if (alen != 2) { 396 err("%s: Send command incomplete [%d]", serial->type->description, alen); 397 goto no_firmware; 398 } 399 400 pipe = usb_rcvbulkpipe (serial->dev, command_port->bulk_in_endpointAddress); 401 /* See the comment on the usb_clear_halt() above */ 402 usb_clear_halt(serial->dev, pipe); 403 ret = usb_bulk_msg (serial->dev, pipe, result, sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS); 404 if (ret) { 405 err("%s: Couldn't get results [%d]", serial->type->description, ret); 406 goto no_firmware; 407 } else if (alen != sizeof(*hw_info) + 1) { 408 err("%s: Get results incomplete [%d]", serial->type->description, alen); 409 goto no_firmware; 410 } else if (result[0] != command[0]) { 411 err("%s: Command failed [%d]", serial->type->description, result[0]); 412 goto no_firmware; 413 } 414 415 hw_info = (struct whiteheat_hw_info *)&result[1]; 416 417 info("%s: Driver %s: Firmware v%d.%02d", serial->type->description, 418 DRIVER_VERSION, hw_info->sw_major_rev, hw_info->sw_minor_rev); 419 420 for (i = 0; i < serial->num_ports; i++) { 421 port = serial->port[i]; 422 423 info = kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL); 424 if (info == NULL) { 425 err("%s: Out of memory for port structures\n", serial->type->description); 426 goto no_private; 427 } 428 429 spin_lock_init(&info->lock); 430 mutex_init(&info->deathwarrant); 431 info->flags = 0; 432 info->mcr = 0; 433 INIT_WORK(&info->rx_work, rx_data_softint); 434 info->port = port; 435 436 INIT_LIST_HEAD(&info->rx_urbs_free); 437 INIT_LIST_HEAD(&info->rx_urbs_submitted); 438 INIT_LIST_HEAD(&info->rx_urb_q); 439 INIT_LIST_HEAD(&info->tx_urbs_free); 440 INIT_LIST_HEAD(&info->tx_urbs_submitted); 441 442 for (j = 0; j < urb_pool_size; j++) { 443 urb = usb_alloc_urb(0, GFP_KERNEL); 444 if (!urb) { 445 err("No free urbs available"); 446 goto no_rx_urb; 447 } 448 buf_size = port->read_urb->transfer_buffer_length; 449 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 450 if (!urb->transfer_buffer) { 451 err("Couldn't allocate urb buffer"); 452 goto no_rx_buf; 453 } 454 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 455 if (!wrap) { 456 err("Couldn't allocate urb wrapper"); 457 goto no_rx_wrap; 458 } 459 usb_fill_bulk_urb(urb, serial->dev, 460 usb_rcvbulkpipe(serial->dev, 461 port->bulk_in_endpointAddress), 462 urb->transfer_buffer, buf_size, 463 whiteheat_read_callback, port); 464 wrap->urb = urb; 465 list_add(&wrap->list, &info->rx_urbs_free); 466 467 urb = usb_alloc_urb(0, GFP_KERNEL); 468 if (!urb) { 469 err("No free urbs available"); 470 goto no_tx_urb; 471 } 472 buf_size = port->write_urb->transfer_buffer_length; 473 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 474 if (!urb->transfer_buffer) { 475 err("Couldn't allocate urb buffer"); 476 goto no_tx_buf; 477 } 478 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 479 if (!wrap) { 480 err("Couldn't allocate urb wrapper"); 481 goto no_tx_wrap; 482 } 483 usb_fill_bulk_urb(urb, serial->dev, 484 usb_sndbulkpipe(serial->dev, 485 port->bulk_out_endpointAddress), 486 urb->transfer_buffer, buf_size, 487 whiteheat_write_callback, port); 488 wrap->urb = urb; 489 list_add(&wrap->list, &info->tx_urbs_free); 490 } 491 492 usb_set_serial_port_data(port, info); 493 } 494 495 command_info = kmalloc(sizeof(struct whiteheat_command_private), GFP_KERNEL); 496 if (command_info == NULL) { 497 err("%s: Out of memory for port structures\n", serial->type->description); 498 goto no_command_private; 499 } 500 501 mutex_init(&command_info->mutex); 502 command_info->port_running = 0; 503 init_waitqueue_head(&command_info->wait_command); 504 usb_set_serial_port_data(command_port, command_info); 505 command_port->write_urb->complete = command_port_write_callback; 506 command_port->read_urb->complete = command_port_read_callback; 507 kfree(result); 508 kfree(command); 509 510 return 0; 511 512no_firmware: 513 /* Firmware likely not running */ 514 err("%s: Unable to retrieve firmware version, try replugging\n", serial->type->description); 515 err("%s: If the firmware is not running (status led not blinking)\n", serial->type->description); 516 err("%s: please contact support@connecttech.com\n", serial->type->description); 517 kfree(result); 518 return -ENODEV; 519 520no_command_private: 521 for (i = serial->num_ports - 1; i >= 0; i--) { 522 port = serial->port[i]; 523 info = usb_get_serial_port_data(port); 524 for (j = urb_pool_size - 1; j >= 0; j--) { 525 tmp = list_first(&info->tx_urbs_free); 526 list_del(tmp); 527 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 528 urb = wrap->urb; 529 kfree(wrap); 530no_tx_wrap: 531 kfree(urb->transfer_buffer); 532no_tx_buf: 533 usb_free_urb(urb); 534no_tx_urb: 535 tmp = list_first(&info->rx_urbs_free); 536 list_del(tmp); 537 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 538 urb = wrap->urb; 539 kfree(wrap); 540no_rx_wrap: 541 kfree(urb->transfer_buffer); 542no_rx_buf: 543 usb_free_urb(urb); 544no_rx_urb: 545 ; 546 } 547 kfree(info); 548no_private: 549 ; 550 } 551 kfree(result); 552no_result_buffer: 553 kfree(command); 554no_command_buffer: 555 return -ENOMEM; 556} 557 558 559static void whiteheat_shutdown (struct usb_serial *serial) 560{ 561 struct usb_serial_port *command_port; 562 struct usb_serial_port *port; 563 struct whiteheat_private *info; 564 struct whiteheat_urb_wrap *wrap; 565 struct urb *urb; 566 struct list_head *tmp; 567 struct list_head *tmp2; 568 int i; 569 570 dbg("%s", __FUNCTION__); 571 572 /* free up our private data for our command port */ 573 command_port = serial->port[COMMAND_PORT]; 574 kfree (usb_get_serial_port_data(command_port)); 575 576 for (i = 0; i < serial->num_ports; i++) { 577 port = serial->port[i]; 578 info = usb_get_serial_port_data(port); 579 list_for_each_safe(tmp, tmp2, &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); 584 kfree(urb->transfer_buffer); 585 usb_free_urb(urb); 586 } 587 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) { 588 list_del(tmp); 589 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 590 urb = wrap->urb; 591 kfree(wrap); 592 kfree(urb->transfer_buffer); 593 usb_free_urb(urb); 594 } 595 kfree(info); 596 } 597 598 return; 599} 600 601 602static int whiteheat_open (struct usb_serial_port *port, struct file *filp) 603{ 604 int retval = 0; 605 struct ktermios old_term; 606 607 dbg("%s - port %d", __FUNCTION__, port->number); 608 609 retval = start_command_port(port->serial); 610 if (retval) 611 goto exit; 612 613 if (port->tty) 614 port->tty->low_latency = 1; 615 616 /* send an open port command */ 617 retval = firm_open(port); 618 if (retval) { 619 stop_command_port(port->serial); 620 goto exit; 621 } 622 623 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX); 624 if (retval) { 625 firm_close(port); 626 stop_command_port(port->serial); 627 goto exit; 628 } 629 630 old_term.c_cflag = ~port->tty->termios->c_cflag; 631 old_term.c_iflag = ~port->tty->termios->c_iflag; 632 whiteheat_set_termios(port, &old_term); 633 634 /* Work around HCD bugs */ 635 usb_clear_halt(port->serial->dev, port->read_urb->pipe); 636 usb_clear_halt(port->serial->dev, port->write_urb->pipe); 637 638 /* Start reading from the device */ 639 retval = start_port_read(port); 640 if (retval) { 641 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval); 642 firm_close(port); 643 stop_command_port(port->serial); 644 goto exit; 645 } 646 647exit: 648 dbg("%s - exit, retval = %d", __FUNCTION__, retval); 649 return retval; 650} 651 652 653static void whiteheat_close(struct usb_serial_port *port, struct file * filp) 654{ 655 struct whiteheat_private *info = usb_get_serial_port_data(port); 656 struct whiteheat_urb_wrap *wrap; 657 struct urb *urb; 658 struct list_head *tmp; 659 struct list_head *tmp2; 660 661 dbg("%s - port %d", __FUNCTION__, port->number); 662 663 /* filp is NULL when called from usb_serial_disconnect */ 664 if (filp && (tty_hung_up_p(filp))) { 665 return; 666 } 667 668 port->tty->closing = 1; 669 670/* 671 * Not currently in use; tty_wait_until_sent() calls 672 * serial_chars_in_buffer() which deadlocks on the second semaphore 673 * acquisition. This should be fixed at some point. Greg's been 674 * notified. 675 if ((filp->f_flags & (O_NDELAY | O_NONBLOCK)) == 0) { 676 tty_wait_until_sent(port->tty, CLOSING_DELAY); 677 } 678*/ 679 680 if (port->tty->driver->flush_buffer) 681 port->tty->driver->flush_buffer(port->tty); 682 tty_ldisc_flush(port->tty); 683 684 firm_report_tx_done(port); 685 686 firm_close(port); 687 688printk(KERN_ERR"Before processing rx_urbs_submitted.\n"); 689 /* shutdown our bulk reads and writes */ 690 mutex_lock(&info->deathwarrant); 691 spin_lock_irq(&info->lock); 692 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 693 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 694 urb = wrap->urb; 695 list_del(tmp); 696 spin_unlock_irq(&info->lock); 697 usb_kill_urb(urb); 698 spin_lock_irq(&info->lock); 699 list_add(tmp, &info->rx_urbs_free); 700 } 701 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) 702 list_move(tmp, &info->rx_urbs_free); 703 list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) { 704 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 705 urb = wrap->urb; 706 list_del(tmp); 707 spin_unlock_irq(&info->lock); 708 usb_kill_urb(urb); 709 spin_lock_irq(&info->lock); 710 list_add(tmp, &info->tx_urbs_free); 711 } 712 spin_unlock_irq(&info->lock); 713 mutex_unlock(&info->deathwarrant); 714 715 stop_command_port(port->serial); 716 717 port->tty->closing = 0; 718} 719 720 721static int whiteheat_write(struct usb_serial_port *port, const unsigned char *buf, int count) 722{ 723 struct usb_serial *serial = port->serial; 724 struct whiteheat_private *info = usb_get_serial_port_data(port); 725 struct whiteheat_urb_wrap *wrap; 726 struct urb *urb; 727 int result; 728 int bytes; 729 int sent = 0; 730 unsigned long flags; 731 struct list_head *tmp; 732 733 dbg("%s - port %d", __FUNCTION__, port->number); 734 735 if (count == 0) { 736 dbg("%s - write request of 0 bytes", __FUNCTION__); 737 return (0); 738 } 739 740 while (count) { 741 spin_lock_irqsave(&info->lock, flags); 742 if (list_empty(&info->tx_urbs_free)) { 743 spin_unlock_irqrestore(&info->lock, flags); 744 break; 745 } 746 tmp = list_first(&info->tx_urbs_free); 747 list_del(tmp); 748 spin_unlock_irqrestore(&info->lock, flags); 749 750 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 751 urb = wrap->urb; 752 bytes = (count > port->bulk_out_size) ? port->bulk_out_size : count; 753 memcpy (urb->transfer_buffer, buf + sent, bytes); 754 755 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, bytes, urb->transfer_buffer); 756 757 urb->dev = serial->dev; 758 urb->transfer_buffer_length = bytes; 759 result = usb_submit_urb(urb, GFP_ATOMIC); 760 if (result) { 761 err("%s - failed submitting write urb, error %d", __FUNCTION__, result); 762 sent = result; 763 spin_lock_irqsave(&info->lock, flags); 764 list_add(tmp, &info->tx_urbs_free); 765 spin_unlock_irqrestore(&info->lock, flags); 766 break; 767 } else { 768 sent += bytes; 769 count -= bytes; 770 spin_lock_irqsave(&info->lock, flags); 771 list_add(tmp, &info->tx_urbs_submitted); 772 spin_unlock_irqrestore(&info->lock, flags); 773 } 774 } 775 776 return sent; 777} 778 779 780static int whiteheat_write_room(struct usb_serial_port *port) 781{ 782 struct whiteheat_private *info = usb_get_serial_port_data(port); 783 struct list_head *tmp; 784 int room = 0; 785 unsigned long flags; 786 787 dbg("%s - port %d", __FUNCTION__, port->number); 788 789 spin_lock_irqsave(&info->lock, flags); 790 list_for_each(tmp, &info->tx_urbs_free) 791 room++; 792 spin_unlock_irqrestore(&info->lock, flags); 793 room *= port->bulk_out_size; 794 795 dbg("%s - returns %d", __FUNCTION__, room); 796 return (room); 797} 798 799 800static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file) 801{ 802 struct whiteheat_private *info = usb_get_serial_port_data(port); 803 unsigned int modem_signals = 0; 804 805 dbg("%s - port %d", __FUNCTION__, port->number); 806 807 firm_get_dtr_rts(port); 808 if (info->mcr & UART_MCR_DTR) 809 modem_signals |= TIOCM_DTR; 810 if (info->mcr & UART_MCR_RTS) 811 modem_signals |= TIOCM_RTS; 812 813 return modem_signals; 814} 815 816 817static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file, 818 unsigned int set, unsigned int clear) 819{ 820 struct whiteheat_private *info = usb_get_serial_port_data(port); 821 822 dbg("%s - port %d", __FUNCTION__, port->number); 823 824 if (set & TIOCM_RTS) 825 info->mcr |= UART_MCR_RTS; 826 if (set & TIOCM_DTR) 827 info->mcr |= UART_MCR_DTR; 828 829 if (clear & TIOCM_RTS) 830 info->mcr &= ~UART_MCR_RTS; 831 if (clear & TIOCM_DTR) 832 info->mcr &= ~UART_MCR_DTR; 833 834 firm_set_dtr(port, info->mcr & UART_MCR_DTR); 835 firm_set_rts(port, info->mcr & UART_MCR_RTS); 836 return 0; 837} 838 839 840static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) 841{ 842 struct serial_struct serstruct; 843 void __user *user_arg = (void __user *)arg; 844 845 dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd); 846 847 switch (cmd) { 848 case TIOCGSERIAL: 849 memset(&serstruct, 0, sizeof(serstruct)); 850 serstruct.type = PORT_16654; 851 serstruct.line = port->serial->minor; 852 serstruct.port = port->number; 853 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 854 serstruct.xmit_fifo_size = port->bulk_out_size; 855 serstruct.custom_divisor = 0; 856 serstruct.baud_base = 460800; 857 serstruct.close_delay = CLOSING_DELAY; 858 serstruct.closing_wait = CLOSING_DELAY; 859 860 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct))) 861 return -EFAULT; 862 863 break; 864 865 case TIOCSSERIAL: 866 if (copy_from_user(&serstruct, user_arg, sizeof(serstruct))) 867 return -EFAULT; 868 869 /* 870 * For now this is ignored. dip sets the ASYNC_[V]HI flags 871 * but this isn't used by us at all. Maybe someone somewhere 872 * will need the custom_divisor setting. 873 */ 874 875 break; 876 877 default: 878 break; 879 } 880 881 return -ENOIOCTLCMD; 882} 883 884 885static void whiteheat_set_termios(struct usb_serial_port *port, struct ktermios *old_termios) 886{ 887 dbg("%s -port %d", __FUNCTION__, port->number); 888 889 if ((!port->tty) || (!port->tty->termios)) { 890 dbg("%s - no tty structures", __FUNCTION__); 891 goto exit; 892 } 893 894 firm_setup_port(port); 895 896exit: 897 return; 898} 899 900 901static void whiteheat_break_ctl(struct usb_serial_port *port, int break_state) { 902 firm_set_break(port, break_state); 903} 904 905 906static int whiteheat_chars_in_buffer(struct usb_serial_port *port) 907{ 908 struct whiteheat_private *info = usb_get_serial_port_data(port); 909 struct list_head *tmp; 910 struct whiteheat_urb_wrap *wrap; 911 int chars = 0; 912 unsigned long flags; 913 914 dbg("%s - port %d", __FUNCTION__, port->number); 915 916 spin_lock_irqsave(&info->lock, flags); 917 list_for_each(tmp, &info->tx_urbs_submitted) { 918 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 919 chars += wrap->urb->transfer_buffer_length; 920 } 921 spin_unlock_irqrestore(&info->lock, flags); 922 923 dbg ("%s - returns %d", __FUNCTION__, chars); 924 return chars; 925} 926 927 928static void whiteheat_throttle (struct usb_serial_port *port) 929{ 930 struct whiteheat_private *info = usb_get_serial_port_data(port); 931 unsigned long flags; 932 933 dbg("%s - port %d", __FUNCTION__, port->number); 934 935 spin_lock_irqsave(&info->lock, flags); 936 info->flags |= THROTTLED; 937 spin_unlock_irqrestore(&info->lock, flags); 938 939 return; 940} 941 942 943static void whiteheat_unthrottle (struct usb_serial_port *port) 944{ 945 struct whiteheat_private *info = usb_get_serial_port_data(port); 946 int actually_throttled; 947 unsigned long flags; 948 949 dbg("%s - port %d", __FUNCTION__, port->number); 950 951 spin_lock_irqsave(&info->lock, flags); 952 actually_throttled = info->flags & ACTUALLY_THROTTLED; 953 info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED); 954 spin_unlock_irqrestore(&info->lock, flags); 955 956 if (actually_throttled) 957 rx_data_softint(&info->rx_work); 958 959 return; 960} 961 962 963/***************************************************************************** 964 * Connect Tech's White Heat callback routines 965 *****************************************************************************/ 966static void command_port_write_callback(struct urb *urb) 967{ 968 int status = urb->status; 969 970 dbg("%s", __FUNCTION__); 971 972 if (status) { 973 dbg("nonzero urb status: %d", status); 974 return; 975 } 976} 977 978 979static void command_port_read_callback(struct urb *urb) 980{ 981 struct usb_serial_port *command_port = (struct usb_serial_port *)urb->context; 982 struct whiteheat_command_private *command_info; 983 int status = urb->status; 984 unsigned char *data = urb->transfer_buffer; 985 int result; 986 987 dbg("%s", __FUNCTION__); 988 989 command_info = usb_get_serial_port_data(command_port); 990 if (!command_info) { 991 dbg ("%s - command_info is NULL, exiting.", __FUNCTION__); 992 return; 993 } 994 if (status) { 995 dbg("%s - nonzero urb status: %d", __FUNCTION__, status); 996 if (status != -ENOENT) 997 command_info->command_finished = WHITEHEAT_CMD_FAILURE; 998 wake_up(&command_info->wait_command); 999 return; 1000 } 1001 1002 usb_serial_debug_data(debug, &command_port->dev, __FUNCTION__, urb->actual_length, data); 1003 1004 if (data[0] == WHITEHEAT_CMD_COMPLETE) { 1005 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 1006 wake_up(&command_info->wait_command); 1007 } else if (data[0] == WHITEHEAT_CMD_FAILURE) { 1008 command_info->command_finished = WHITEHEAT_CMD_FAILURE; 1009 wake_up(&command_info->wait_command); 1010 } else if (data[0] == WHITEHEAT_EVENT) { 1011 /* These are unsolicited reports from the firmware, hence no waiting command to wakeup */ 1012 dbg("%s - event received", __FUNCTION__); 1013 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) { 1014 memcpy(command_info->result_buffer, &data[1], urb->actual_length - 1); 1015 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 1016 wake_up(&command_info->wait_command); 1017 } else { 1018 dbg("%s - bad reply from firmware", __FUNCTION__); 1019 } 1020 1021 /* Continue trying to always read */ 1022 command_port->read_urb->dev = command_port->serial->dev; 1023 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC); 1024 if (result) 1025 dbg("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); 1026} 1027 1028 1029static void whiteheat_read_callback(struct urb *urb) 1030{ 1031 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 1032 struct whiteheat_urb_wrap *wrap; 1033 unsigned char *data = urb->transfer_buffer; 1034 struct whiteheat_private *info = usb_get_serial_port_data(port); 1035 int status = urb->status; 1036 1037 dbg("%s - port %d", __FUNCTION__, port->number); 1038 1039 spin_lock(&info->lock); 1040 wrap = urb_to_wrap(urb, &info->rx_urbs_submitted); 1041 if (!wrap) { 1042 spin_unlock(&info->lock); 1043 err("%s - Not my urb!", __FUNCTION__); 1044 return; 1045 } 1046 list_del(&wrap->list); 1047 spin_unlock(&info->lock); 1048 1049 if (status) { 1050 dbg("%s - nonzero read bulk status received: %d", 1051 __FUNCTION__, status); 1052 spin_lock(&info->lock); 1053 list_add(&wrap->list, &info->rx_urbs_free); 1054 spin_unlock(&info->lock); 1055 return; 1056 } 1057 1058 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); 1059 1060 spin_lock(&info->lock); 1061 list_add_tail(&wrap->list, &info->rx_urb_q); 1062 if (info->flags & THROTTLED) { 1063 info->flags |= ACTUALLY_THROTTLED; 1064 spin_unlock(&info->lock); 1065 return; 1066 } 1067 spin_unlock(&info->lock); 1068 1069 schedule_work(&info->rx_work); 1070} 1071 1072 1073static void whiteheat_write_callback(struct urb *urb) 1074{ 1075 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 1076 struct whiteheat_private *info = usb_get_serial_port_data(port); 1077 struct whiteheat_urb_wrap *wrap; 1078 int status = urb->status; 1079 1080 dbg("%s - port %d", __FUNCTION__, port->number); 1081 1082 spin_lock(&info->lock); 1083 wrap = urb_to_wrap(urb, &info->tx_urbs_submitted); 1084 if (!wrap) { 1085 spin_unlock(&info->lock); 1086 err("%s - Not my urb!", __FUNCTION__); 1087 return; 1088 } 1089 list_move(&wrap->list, &info->tx_urbs_free); 1090 spin_unlock(&info->lock); 1091 1092 if (status) { 1093 dbg("%s - nonzero write bulk status received: %d", 1094 __FUNCTION__, status); 1095 return; 1096 } 1097 1098 usb_serial_port_softint(port); 1099} 1100 1101 1102/***************************************************************************** 1103 * Connect Tech's White Heat firmware interface 1104 *****************************************************************************/ 1105static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize) 1106{ 1107 struct usb_serial_port *command_port; 1108 struct whiteheat_command_private *command_info; 1109 struct whiteheat_private *info; 1110 __u8 *transfer_buffer; 1111 int retval = 0; 1112 int t; 1113 1114 dbg("%s - command %d", __FUNCTION__, command); 1115 1116 command_port = port->serial->port[COMMAND_PORT]; 1117 command_info = usb_get_serial_port_data(command_port); 1118 mutex_lock(&command_info->mutex); 1119 command_info->command_finished = false; 1120 1121 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer; 1122 transfer_buffer[0] = command; 1123 memcpy (&transfer_buffer[1], data, datasize); 1124 command_port->write_urb->transfer_buffer_length = datasize + 1; 1125 command_port->write_urb->dev = port->serial->dev; 1126 retval = usb_submit_urb (command_port->write_urb, GFP_NOIO); 1127 if (retval) { 1128 dbg("%s - submit urb failed", __FUNCTION__); 1129 goto exit; 1130 } 1131 1132 /* wait for the command to complete */ 1133 t = wait_event_timeout(command_info->wait_command, 1134 (bool)command_info->command_finished, COMMAND_TIMEOUT); 1135 if (!t) 1136 usb_kill_urb(command_port->write_urb); 1137 1138 if (command_info->command_finished == false) { 1139 dbg("%s - command timed out.", __FUNCTION__); 1140 retval = -ETIMEDOUT; 1141 goto exit; 1142 } 1143 1144 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) { 1145 dbg("%s - command failed.", __FUNCTION__); 1146 retval = -EIO; 1147 goto exit; 1148 } 1149 1150 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) { 1151 dbg("%s - command completed.", __FUNCTION__); 1152 switch (command) { 1153 case WHITEHEAT_GET_DTR_RTS: 1154 info = usb_get_serial_port_data(port); 1155 memcpy(&info->mcr, command_info->result_buffer, sizeof(struct whiteheat_dr_info)); 1156 break; 1157 } 1158 } 1159 1160exit: 1161 mutex_unlock(&command_info->mutex); 1162 return retval; 1163} 1164 1165 1166static int firm_open(struct usb_serial_port *port) { 1167 struct whiteheat_simple open_command; 1168 1169 open_command.port = port->number - port->serial->minor + 1; 1170 return firm_send_command(port, WHITEHEAT_OPEN, (__u8 *)&open_command, sizeof(open_command)); 1171} 1172 1173 1174static int firm_close(struct usb_serial_port *port) { 1175 struct whiteheat_simple close_command; 1176 1177 close_command.port = port->number - port->serial->minor + 1; 1178 return firm_send_command(port, WHITEHEAT_CLOSE, (__u8 *)&close_command, sizeof(close_command)); 1179} 1180 1181 1182static int firm_setup_port(struct usb_serial_port *port) { 1183 struct whiteheat_port_settings port_settings; 1184 unsigned int cflag = port->tty->termios->c_cflag; 1185 1186 port_settings.port = port->number + 1; 1187 1188 /* get the byte size */ 1189 switch (cflag & CSIZE) { 1190 case CS5: port_settings.bits = 5; break; 1191 case CS6: port_settings.bits = 6; break; 1192 case CS7: port_settings.bits = 7; break; 1193 default: 1194 case CS8: port_settings.bits = 8; break; 1195 } 1196 dbg("%s - data bits = %d", __FUNCTION__, port_settings.bits); 1197 1198 /* determine the parity */ 1199 if (cflag & PARENB) 1200 if (cflag & CMSPAR) 1201 if (cflag & PARODD) 1202 port_settings.parity = WHITEHEAT_PAR_MARK; 1203 else 1204 port_settings.parity = WHITEHEAT_PAR_SPACE; 1205 else 1206 if (cflag & PARODD) 1207 port_settings.parity = WHITEHEAT_PAR_ODD; 1208 else 1209 port_settings.parity = WHITEHEAT_PAR_EVEN; 1210 else 1211 port_settings.parity = WHITEHEAT_PAR_NONE; 1212 dbg("%s - parity = %c", __FUNCTION__, port_settings.parity); 1213 1214 /* figure out the stop bits requested */ 1215 if (cflag & CSTOPB) 1216 port_settings.stop = 2; 1217 else 1218 port_settings.stop = 1; 1219 dbg("%s - stop bits = %d", __FUNCTION__, port_settings.stop); 1220 1221 /* figure out the flow control settings */ 1222 if (cflag & CRTSCTS) 1223 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | WHITEHEAT_HFLOW_RTS); 1224 else 1225 port_settings.hflow = WHITEHEAT_HFLOW_NONE; 1226 dbg("%s - hardware flow control = %s %s %s %s", __FUNCTION__, 1227 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "", 1228 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "", 1229 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "", 1230 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : ""); 1231 1232 /* determine software flow control */ 1233 if (I_IXOFF(port->tty)) 1234 port_settings.sflow = WHITEHEAT_SFLOW_RXTX; 1235 else 1236 port_settings.sflow = WHITEHEAT_SFLOW_NONE; 1237 dbg("%s - software flow control = %c", __FUNCTION__, port_settings.sflow); 1238 1239 port_settings.xon = START_CHAR(port->tty); 1240 port_settings.xoff = STOP_CHAR(port->tty); 1241 dbg("%s - XON = %2x, XOFF = %2x", __FUNCTION__, port_settings.xon, port_settings.xoff); 1242 1243 /* get the baud rate wanted */ 1244 port_settings.baud = tty_get_baud_rate(port->tty); 1245 dbg("%s - baud rate = %d", __FUNCTION__, port_settings.baud); 1246 1247 /* handle any settings that aren't specified in the tty structure */ 1248 port_settings.lloop = 0; 1249 1250 /* now send the message to the device */ 1251 return firm_send_command(port, WHITEHEAT_SETUP_PORT, (__u8 *)&port_settings, sizeof(port_settings)); 1252} 1253 1254 1255static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) { 1256 struct whiteheat_set_rdb rts_command; 1257 1258 rts_command.port = port->number - port->serial->minor + 1; 1259 rts_command.state = onoff; 1260 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&rts_command, sizeof(rts_command)); 1261} 1262 1263 1264static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) { 1265 struct whiteheat_set_rdb dtr_command; 1266 1267 dtr_command.port = port->number - port->serial->minor + 1; 1268 dtr_command.state = onoff; 1269 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&dtr_command, sizeof(dtr_command)); 1270} 1271 1272 1273static int firm_set_break(struct usb_serial_port *port, __u8 onoff) { 1274 struct whiteheat_set_rdb break_command; 1275 1276 break_command.port = port->number - port->serial->minor + 1; 1277 break_command.state = onoff; 1278 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&break_command, sizeof(break_command)); 1279} 1280 1281 1282static int firm_purge(struct usb_serial_port *port, __u8 rxtx) { 1283 struct whiteheat_purge purge_command; 1284 1285 purge_command.port = port->number - port->serial->minor + 1; 1286 purge_command.what = rxtx; 1287 return firm_send_command(port, WHITEHEAT_PURGE, (__u8 *)&purge_command, sizeof(purge_command)); 1288} 1289 1290 1291static int firm_get_dtr_rts(struct usb_serial_port *port) { 1292 struct whiteheat_simple get_dr_command; 1293 1294 get_dr_command.port = port->number - port->serial->minor + 1; 1295 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, (__u8 *)&get_dr_command, sizeof(get_dr_command)); 1296} 1297 1298 1299static int firm_report_tx_done(struct usb_serial_port *port) { 1300 struct whiteheat_simple close_command; 1301 1302 close_command.port = port->number - port->serial->minor + 1; 1303 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, (__u8 *)&close_command, sizeof(close_command)); 1304} 1305 1306 1307/***************************************************************************** 1308 * Connect Tech's White Heat utility functions 1309 *****************************************************************************/ 1310static int start_command_port(struct usb_serial *serial) 1311{ 1312 struct usb_serial_port *command_port; 1313 struct whiteheat_command_private *command_info; 1314 int retval = 0; 1315 1316 command_port = serial->port[COMMAND_PORT]; 1317 command_info = usb_get_serial_port_data(command_port); 1318 mutex_lock(&command_info->mutex); 1319 if (!command_info->port_running) { 1320 /* Work around HCD bugs */ 1321 usb_clear_halt(serial->dev, command_port->read_urb->pipe); 1322 1323 command_port->read_urb->dev = serial->dev; 1324 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL); 1325 if (retval) { 1326 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval); 1327 goto exit; 1328 } 1329 } 1330 command_info->port_running++; 1331 1332exit: 1333 mutex_unlock(&command_info->mutex); 1334 return retval; 1335} 1336 1337 1338static void stop_command_port(struct usb_serial *serial) 1339{ 1340 struct usb_serial_port *command_port; 1341 struct whiteheat_command_private *command_info; 1342 1343 command_port = serial->port[COMMAND_PORT]; 1344 command_info = usb_get_serial_port_data(command_port); 1345 mutex_lock(&command_info->mutex); 1346 command_info->port_running--; 1347 if (!command_info->port_running) 1348 usb_kill_urb(command_port->read_urb); 1349 mutex_unlock(&command_info->mutex); 1350} 1351 1352 1353static int start_port_read(struct usb_serial_port *port) 1354{ 1355 struct whiteheat_private *info = usb_get_serial_port_data(port); 1356 struct whiteheat_urb_wrap *wrap; 1357 struct urb *urb; 1358 int retval = 0; 1359 unsigned long flags; 1360 struct list_head *tmp; 1361 struct list_head *tmp2; 1362 1363 spin_lock_irqsave(&info->lock, flags); 1364 1365 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 1366 list_del(tmp); 1367 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1368 urb = wrap->urb; 1369 urb->dev = port->serial->dev; 1370 spin_unlock_irqrestore(&info->lock, flags); 1371 retval = usb_submit_urb(urb, GFP_KERNEL); 1372 if (retval) { 1373 spin_lock_irqsave(&info->lock, flags); 1374 list_add(tmp, &info->rx_urbs_free); 1375 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 1376 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1377 urb = wrap->urb; 1378 list_del(tmp); 1379 spin_unlock_irqrestore(&info->lock, flags); 1380 usb_kill_urb(urb); 1381 spin_lock_irqsave(&info->lock, flags); 1382 list_add(tmp, &info->rx_urbs_free); 1383 } 1384 break; 1385 } 1386 spin_lock_irqsave(&info->lock, flags); 1387 list_add(tmp, &info->rx_urbs_submitted); 1388 } 1389 1390 spin_unlock_irqrestore(&info->lock, flags); 1391 1392 return retval; 1393} 1394 1395 1396static struct whiteheat_urb_wrap *urb_to_wrap(struct urb* urb, struct list_head *head) 1397{ 1398 struct whiteheat_urb_wrap *wrap; 1399 struct list_head *tmp; 1400 1401 list_for_each(tmp, head) { 1402 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1403 if (wrap->urb == urb) 1404 return wrap; 1405 } 1406 1407 return NULL; 1408} 1409 1410 1411static struct list_head *list_first(struct list_head *head) 1412{ 1413 return head->next; 1414} 1415 1416 1417static void rx_data_softint(struct work_struct *work) 1418{ 1419 struct whiteheat_private *info = 1420 container_of(work, struct whiteheat_private, rx_work); 1421 struct usb_serial_port *port = info->port; 1422 struct tty_struct *tty = port->tty; 1423 struct whiteheat_urb_wrap *wrap; 1424 struct urb *urb; 1425 unsigned long flags; 1426 struct list_head *tmp; 1427 struct list_head *tmp2; 1428 int result; 1429 int sent = 0; 1430 1431 spin_lock_irqsave(&info->lock, flags); 1432 if (info->flags & THROTTLED) { 1433 spin_unlock_irqrestore(&info->lock, flags); 1434 return; 1435 } 1436 1437 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) { 1438 list_del(tmp); 1439 spin_unlock_irqrestore(&info->lock, flags); 1440 1441 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1442 urb = wrap->urb; 1443 1444 if (tty && urb->actual_length) { 1445 int len = tty_buffer_request_room(tty, urb->actual_length); 1446 /* This stuff can go away now I suspect */ 1447 if (unlikely(len < urb->actual_length)) { 1448 spin_lock_irqsave(&info->lock, flags); 1449 list_add(tmp, &info->rx_urb_q); 1450 spin_unlock_irqrestore(&info->lock, flags); 1451 tty_flip_buffer_push(tty); 1452 schedule_work(&info->rx_work); 1453 return; 1454 } 1455 tty_insert_flip_string(tty, urb->transfer_buffer, len); 1456 sent += len; 1457 } 1458 1459 urb->dev = port->serial->dev; 1460 result = usb_submit_urb(urb, GFP_ATOMIC); 1461 if (result) { 1462 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); 1463 spin_lock_irqsave(&info->lock, flags); 1464 list_add(tmp, &info->rx_urbs_free); 1465 continue; 1466 } 1467 1468 spin_lock_irqsave(&info->lock, flags); 1469 list_add(tmp, &info->rx_urbs_submitted); 1470 } 1471 spin_unlock_irqrestore(&info->lock, flags); 1472 1473 if (sent) 1474 tty_flip_buffer_push(tty); 1475} 1476 1477 1478/***************************************************************************** 1479 * Connect Tech's White Heat module functions 1480 *****************************************************************************/ 1481static int __init whiteheat_init (void) 1482{ 1483 int retval; 1484 retval = usb_serial_register(&whiteheat_fake_device); 1485 if (retval) 1486 goto failed_fake_register; 1487 retval = usb_serial_register(&whiteheat_device); 1488 if (retval) 1489 goto failed_device_register; 1490 retval = usb_register(&whiteheat_driver); 1491 if (retval) 1492 goto failed_usb_register; 1493 info(DRIVER_DESC " " DRIVER_VERSION); 1494 return 0; 1495failed_usb_register: 1496 usb_serial_deregister(&whiteheat_device); 1497failed_device_register: 1498 usb_serial_deregister(&whiteheat_fake_device); 1499failed_fake_register: 1500 return retval; 1501} 1502 1503 1504static void __exit whiteheat_exit (void) 1505{ 1506 usb_deregister (&whiteheat_driver); 1507 usb_serial_deregister (&whiteheat_fake_device); 1508 usb_serial_deregister (&whiteheat_device); 1509} 1510 1511 1512module_init(whiteheat_init); 1513module_exit(whiteheat_exit); 1514 1515MODULE_AUTHOR( DRIVER_AUTHOR ); 1516MODULE_DESCRIPTION( DRIVER_DESC ); 1517MODULE_LICENSE("GPL"); 1518 1519module_param(urb_pool_size, int, 0); 1520MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering"); 1521 1522module_param(debug, bool, S_IRUGO | S_IWUSR); 1523MODULE_PARM_DESC(debug, "Debug enabled or not"); 1524