whiteheat.c revision ba9dc657af86d05d2971633e57d1f6f94ed60472
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/config.h> 69#include <linux/kernel.h> 70#include <linux/errno.h> 71#include <linux/init.h> 72#include <linux/slab.h> 73#include <linux/tty.h> 74#include <linux/tty_driver.h> 75#include <linux/tty_flip.h> 76#include <linux/module.h> 77#include <linux/spinlock.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 "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 .owner = THIS_MODULE, 131 .name = "whiteheat", 132 .probe = usb_serial_probe, 133 .disconnect = usb_serial_disconnect, 134 .id_table = id_table_combined, 135 .no_dynamic_id = 1, 136}; 137 138/* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */ 139static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id); 140static int whiteheat_firmware_attach (struct usb_serial *serial); 141 142/* function prototypes for the Connect Tech WhiteHEAT serial converter */ 143static int whiteheat_attach (struct usb_serial *serial); 144static void whiteheat_shutdown (struct usb_serial *serial); 145static int whiteheat_open (struct usb_serial_port *port, struct file *filp); 146static void whiteheat_close (struct usb_serial_port *port, struct file *filp); 147static int whiteheat_write (struct usb_serial_port *port, const unsigned char *buf, int count); 148static int whiteheat_write_room (struct usb_serial_port *port); 149static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg); 150static void whiteheat_set_termios (struct usb_serial_port *port, struct termios * old); 151static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file); 152static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear); 153static void whiteheat_break_ctl (struct usb_serial_port *port, int break_state); 154static int whiteheat_chars_in_buffer (struct usb_serial_port *port); 155static void whiteheat_throttle (struct usb_serial_port *port); 156static void whiteheat_unthrottle (struct usb_serial_port *port); 157static void whiteheat_read_callback (struct urb *urb, struct pt_regs *regs); 158static void whiteheat_write_callback (struct urb *urb, struct pt_regs *regs); 159 160static struct usb_serial_driver whiteheat_fake_device = { 161 .driver = { 162 .owner = THIS_MODULE, 163 .name = "whiteheatnofirm", 164 }, 165 .description = "Connect Tech - WhiteHEAT - (prerenumeration)", 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 .id_table = id_table_std, 182 .num_interrupt_in = NUM_DONT_CARE, 183 .num_bulk_in = NUM_DONT_CARE, 184 .num_bulk_out = NUM_DONT_CARE, 185 .num_ports = 4, 186 .attach = whiteheat_attach, 187 .shutdown = whiteheat_shutdown, 188 .open = whiteheat_open, 189 .close = whiteheat_close, 190 .write = whiteheat_write, 191 .write_room = whiteheat_write_room, 192 .ioctl = whiteheat_ioctl, 193 .set_termios = whiteheat_set_termios, 194 .break_ctl = whiteheat_break_ctl, 195 .tiocmget = whiteheat_tiocmget, 196 .tiocmset = whiteheat_tiocmset, 197 .chars_in_buffer = whiteheat_chars_in_buffer, 198 .throttle = whiteheat_throttle, 199 .unthrottle = whiteheat_unthrottle, 200 .read_bulk_callback = whiteheat_read_callback, 201 .write_bulk_callback = whiteheat_write_callback, 202}; 203 204 205struct whiteheat_command_private { 206 spinlock_t lock; 207 __u8 port_running; 208 __u8 command_finished; 209 wait_queue_head_t wait_command; /* for handling sleeping while waiting for a command to finish */ 210 __u8 result_buffer[64]; 211}; 212 213 214#define THROTTLED 0x01 215#define ACTUALLY_THROTTLED 0x02 216 217static int urb_pool_size = 8; 218 219struct whiteheat_urb_wrap { 220 struct list_head list; 221 struct urb *urb; 222}; 223 224struct whiteheat_private { 225 spinlock_t lock; 226 __u8 flags; 227 __u8 mcr; 228 struct list_head rx_urbs_free; 229 struct list_head rx_urbs_submitted; 230 struct list_head rx_urb_q; 231 struct work_struct rx_work; 232 struct list_head tx_urbs_free; 233 struct list_head tx_urbs_submitted; 234}; 235 236 237/* local function prototypes */ 238static int start_command_port(struct usb_serial *serial); 239static void stop_command_port(struct usb_serial *serial); 240static void command_port_write_callback(struct urb *urb, struct pt_regs *regs); 241static void command_port_read_callback(struct urb *urb, struct pt_regs *regs); 242 243static int start_port_read(struct usb_serial_port *port); 244static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, struct list_head *head); 245static struct list_head *list_first(struct list_head *head); 246static void rx_data_softint(void *private); 247 248static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize); 249static int firm_open(struct usb_serial_port *port); 250static int firm_close(struct usb_serial_port *port); 251static int firm_setup_port(struct usb_serial_port *port); 252static int firm_set_rts(struct usb_serial_port *port, __u8 onoff); 253static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff); 254static int firm_set_break(struct usb_serial_port *port, __u8 onoff); 255static int firm_purge(struct usb_serial_port *port, __u8 rxtx); 256static int firm_get_dtr_rts(struct usb_serial_port *port); 257static int firm_report_tx_done(struct usb_serial_port *port); 258 259 260#define COMMAND_PORT 4 261#define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */ 262#define COMMAND_TIMEOUT_MS 2000 263#define CLOSING_DELAY (30 * HZ) 264 265 266/***************************************************************************** 267 * Connect Tech's White Heat prerenumeration driver functions 268 *****************************************************************************/ 269 270/* steps to download the firmware to the WhiteHEAT device: 271 - hold the reset (by writing to the reset bit of the CPUCS register) 272 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD 273 - release the reset (by writing to the CPUCS register) 274 - download the WH.HEX file for all addresses greater than 0x1b3f using 275 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD 276 - hold the reset 277 - download the WH.HEX file for all addresses less than 0x1b40 using 278 VENDOR_REQUEST_ANCHOR_LOAD 279 - release the reset 280 - device renumerated itself and comes up as new device id with all 281 firmware download completed. 282*/ 283static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id) 284{ 285 int response; 286 const struct whiteheat_hex_record *record; 287 288 dbg("%s", __FUNCTION__); 289 290 response = ezusb_set_reset (serial, 1); 291 292 record = &whiteheat_loader[0]; 293 while (record->address != 0xffff) { 294 response = ezusb_writememory (serial, record->address, 295 (unsigned char *)record->data, record->data_size, 0xa0); 296 if (response < 0) { 297 err("%s - ezusb_writememory failed for loader (%d %04X %p %d)", 298 __FUNCTION__, response, record->address, record->data, record->data_size); 299 break; 300 } 301 ++record; 302 } 303 304 response = ezusb_set_reset (serial, 0); 305 306 record = &whiteheat_firmware[0]; 307 while (record->address < 0x1b40) { 308 ++record; 309 } 310 while (record->address != 0xffff) { 311 response = ezusb_writememory (serial, record->address, 312 (unsigned char *)record->data, record->data_size, 0xa3); 313 if (response < 0) { 314 err("%s - ezusb_writememory failed for first firmware step (%d %04X %p %d)", 315 __FUNCTION__, response, record->address, record->data, record->data_size); 316 break; 317 } 318 ++record; 319 } 320 321 response = ezusb_set_reset (serial, 1); 322 323 record = &whiteheat_firmware[0]; 324 while (record->address < 0x1b40) { 325 response = ezusb_writememory (serial, record->address, 326 (unsigned char *)record->data, record->data_size, 0xa0); 327 if (response < 0) { 328 err("%s - ezusb_writememory failed for second firmware step (%d %04X %p %d)", 329 __FUNCTION__, response, record->address, record->data, record->data_size); 330 break; 331 } 332 ++record; 333 } 334 335 response = ezusb_set_reset (serial, 0); 336 337 return 0; 338} 339 340 341static int whiteheat_firmware_attach (struct usb_serial *serial) 342{ 343 /* We want this device to fail to have a driver assigned to it */ 344 return 1; 345} 346 347 348/***************************************************************************** 349 * Connect Tech's White Heat serial driver functions 350 *****************************************************************************/ 351static int whiteheat_attach (struct usb_serial *serial) 352{ 353 struct usb_serial_port *command_port; 354 struct whiteheat_command_private *command_info; 355 struct usb_serial_port *port; 356 struct whiteheat_private *info; 357 struct whiteheat_hw_info *hw_info; 358 int pipe; 359 int ret; 360 int alen; 361 __u8 *command; 362 __u8 *result; 363 int i; 364 int j; 365 struct urb *urb; 366 int buf_size; 367 struct whiteheat_urb_wrap *wrap; 368 struct list_head *tmp; 369 370 command_port = serial->port[COMMAND_PORT]; 371 372 pipe = usb_sndbulkpipe (serial->dev, command_port->bulk_out_endpointAddress); 373 command = kmalloc(2, GFP_KERNEL); 374 if (!command) 375 goto no_command_buffer; 376 command[0] = WHITEHEAT_GET_HW_INFO; 377 command[1] = 0; 378 379 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL); 380 if (!result) 381 goto no_result_buffer; 382 /* 383 * When the module is reloaded the firmware is still there and 384 * the endpoints are still in the usb core unchanged. This is the 385 * unlinking bug in disguise. Same for the call below. 386 */ 387 usb_clear_halt(serial->dev, pipe); 388 ret = usb_bulk_msg (serial->dev, pipe, command, 2, &alen, COMMAND_TIMEOUT_MS); 389 if (ret) { 390 err("%s: Couldn't send command [%d]", serial->type->description, ret); 391 goto no_firmware; 392 } else if (alen != sizeof(command)) { 393 err("%s: Send command incomplete [%d]", serial->type->description, alen); 394 goto no_firmware; 395 } 396 397 pipe = usb_rcvbulkpipe (serial->dev, command_port->bulk_in_endpointAddress); 398 /* See the comment on the usb_clear_halt() above */ 399 usb_clear_halt(serial->dev, pipe); 400 ret = usb_bulk_msg (serial->dev, pipe, result, sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS); 401 if (ret) { 402 err("%s: Couldn't get results [%d]", serial->type->description, ret); 403 goto no_firmware; 404 } else if (alen != sizeof(result)) { 405 err("%s: Get results incomplete [%d]", serial->type->description, alen); 406 goto no_firmware; 407 } else if (result[0] != command[0]) { 408 err("%s: Command failed [%d]", serial->type->description, result[0]); 409 goto no_firmware; 410 } 411 412 hw_info = (struct whiteheat_hw_info *)&result[1]; 413 414 info("%s: Driver %s: Firmware v%d.%02d", serial->type->description, 415 DRIVER_VERSION, hw_info->sw_major_rev, hw_info->sw_minor_rev); 416 417 for (i = 0; i < serial->num_ports; i++) { 418 port = serial->port[i]; 419 420 info = (struct whiteheat_private *)kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL); 421 if (info == NULL) { 422 err("%s: Out of memory for port structures\n", serial->type->description); 423 goto no_private; 424 } 425 426 spin_lock_init(&info->lock); 427 info->flags = 0; 428 info->mcr = 0; 429 INIT_WORK(&info->rx_work, rx_data_softint, port); 430 431 INIT_LIST_HEAD(&info->rx_urbs_free); 432 INIT_LIST_HEAD(&info->rx_urbs_submitted); 433 INIT_LIST_HEAD(&info->rx_urb_q); 434 INIT_LIST_HEAD(&info->tx_urbs_free); 435 INIT_LIST_HEAD(&info->tx_urbs_submitted); 436 437 for (j = 0; j < urb_pool_size; j++) { 438 urb = usb_alloc_urb(0, GFP_KERNEL); 439 if (!urb) { 440 err("No free urbs available"); 441 goto no_rx_urb; 442 } 443 buf_size = port->read_urb->transfer_buffer_length; 444 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 445 if (!urb->transfer_buffer) { 446 err("Couldn't allocate urb buffer"); 447 goto no_rx_buf; 448 } 449 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 450 if (!wrap) { 451 err("Couldn't allocate urb wrapper"); 452 goto no_rx_wrap; 453 } 454 usb_fill_bulk_urb(urb, serial->dev, 455 usb_rcvbulkpipe(serial->dev, 456 port->bulk_in_endpointAddress), 457 urb->transfer_buffer, buf_size, 458 whiteheat_read_callback, port); 459 wrap->urb = urb; 460 list_add(&wrap->list, &info->rx_urbs_free); 461 462 urb = usb_alloc_urb(0, GFP_KERNEL); 463 if (!urb) { 464 err("No free urbs available"); 465 goto no_tx_urb; 466 } 467 buf_size = port->write_urb->transfer_buffer_length; 468 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 469 if (!urb->transfer_buffer) { 470 err("Couldn't allocate urb buffer"); 471 goto no_tx_buf; 472 } 473 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 474 if (!wrap) { 475 err("Couldn't allocate urb wrapper"); 476 goto no_tx_wrap; 477 } 478 usb_fill_bulk_urb(urb, serial->dev, 479 usb_sndbulkpipe(serial->dev, 480 port->bulk_out_endpointAddress), 481 urb->transfer_buffer, buf_size, 482 whiteheat_write_callback, port); 483 wrap->urb = urb; 484 list_add(&wrap->list, &info->tx_urbs_free); 485 } 486 487 usb_set_serial_port_data(port, info); 488 } 489 490 command_info = (struct whiteheat_command_private *)kmalloc(sizeof(struct whiteheat_command_private), GFP_KERNEL); 491 if (command_info == NULL) { 492 err("%s: Out of memory for port structures\n", serial->type->description); 493 goto no_command_private; 494 } 495 496 spin_lock_init(&command_info->lock); 497 command_info->port_running = 0; 498 init_waitqueue_head(&command_info->wait_command); 499 usb_set_serial_port_data(command_port, command_info); 500 command_port->write_urb->complete = command_port_write_callback; 501 command_port->read_urb->complete = command_port_read_callback; 502 kfree(result); 503 kfree(command); 504 505 return 0; 506 507no_firmware: 508 /* Firmware likely not running */ 509 err("%s: Unable to retrieve firmware version, try replugging\n", serial->type->description); 510 err("%s: If the firmware is not running (status led not blinking)\n", serial->type->description); 511 err("%s: please contact support@connecttech.com\n", serial->type->description); 512 return -ENODEV; 513 514no_command_private: 515 for (i = serial->num_ports - 1; i >= 0; i--) { 516 port = serial->port[i]; 517 info = usb_get_serial_port_data(port); 518 for (j = urb_pool_size - 1; j >= 0; j--) { 519 tmp = list_first(&info->tx_urbs_free); 520 list_del(tmp); 521 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 522 urb = wrap->urb; 523 kfree(wrap); 524no_tx_wrap: 525 kfree(urb->transfer_buffer); 526no_tx_buf: 527 usb_free_urb(urb); 528no_tx_urb: 529 tmp = list_first(&info->rx_urbs_free); 530 list_del(tmp); 531 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 532 urb = wrap->urb; 533 kfree(wrap); 534no_rx_wrap: 535 kfree(urb->transfer_buffer); 536no_rx_buf: 537 usb_free_urb(urb); 538no_rx_urb: 539 ; 540 } 541 kfree(info); 542no_private: 543 ; 544 } 545 kfree(result); 546no_result_buffer: 547 kfree(command); 548no_command_buffer: 549 return -ENOMEM; 550} 551 552 553static void whiteheat_shutdown (struct usb_serial *serial) 554{ 555 struct usb_serial_port *command_port; 556 struct usb_serial_port *port; 557 struct whiteheat_private *info; 558 struct whiteheat_urb_wrap *wrap; 559 struct urb *urb; 560 struct list_head *tmp; 561 struct list_head *tmp2; 562 int i; 563 564 dbg("%s", __FUNCTION__); 565 566 /* free up our private data for our command port */ 567 command_port = serial->port[COMMAND_PORT]; 568 kfree (usb_get_serial_port_data(command_port)); 569 570 for (i = 0; i < serial->num_ports; i++) { 571 port = serial->port[i]; 572 info = usb_get_serial_port_data(port); 573 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 574 list_del(tmp); 575 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 576 urb = wrap->urb; 577 kfree(wrap); 578 kfree(urb->transfer_buffer); 579 usb_free_urb(urb); 580 } 581 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) { 582 list_del(tmp); 583 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 584 urb = wrap->urb; 585 kfree(wrap); 586 kfree(urb->transfer_buffer); 587 usb_free_urb(urb); 588 } 589 kfree(info); 590 } 591 592 return; 593} 594 595 596static int whiteheat_open (struct usb_serial_port *port, struct file *filp) 597{ 598 int retval = 0; 599 struct termios old_term; 600 601 dbg("%s - port %d", __FUNCTION__, port->number); 602 603 retval = start_command_port(port->serial); 604 if (retval) 605 goto exit; 606 607 if (port->tty) 608 port->tty->low_latency = 1; 609 610 /* send an open port command */ 611 retval = firm_open(port); 612 if (retval) { 613 stop_command_port(port->serial); 614 goto exit; 615 } 616 617 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX); 618 if (retval) { 619 firm_close(port); 620 stop_command_port(port->serial); 621 goto exit; 622 } 623 624 old_term.c_cflag = ~port->tty->termios->c_cflag; 625 old_term.c_iflag = ~port->tty->termios->c_iflag; 626 whiteheat_set_termios(port, &old_term); 627 628 /* Work around HCD bugs */ 629 usb_clear_halt(port->serial->dev, port->read_urb->pipe); 630 usb_clear_halt(port->serial->dev, port->write_urb->pipe); 631 632 /* Start reading from the device */ 633 retval = start_port_read(port); 634 if (retval) { 635 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval); 636 firm_close(port); 637 stop_command_port(port->serial); 638 goto exit; 639 } 640 641exit: 642 dbg("%s - exit, retval = %d", __FUNCTION__, retval); 643 return retval; 644} 645 646 647static void whiteheat_close(struct usb_serial_port *port, struct file * filp) 648{ 649 struct whiteheat_private *info = usb_get_serial_port_data(port); 650 struct whiteheat_urb_wrap *wrap; 651 struct urb *urb; 652 struct list_head *tmp; 653 struct list_head *tmp2; 654 unsigned long flags; 655 656 dbg("%s - port %d", __FUNCTION__, port->number); 657 658 /* filp is NULL when called from usb_serial_disconnect */ 659 if (filp && (tty_hung_up_p(filp))) { 660 return; 661 } 662 663 port->tty->closing = 1; 664 665/* 666 * Not currently in use; tty_wait_until_sent() calls 667 * serial_chars_in_buffer() which deadlocks on the second semaphore 668 * acquisition. This should be fixed at some point. Greg's been 669 * notified. 670 if ((filp->f_flags & (O_NDELAY | O_NONBLOCK)) == 0) { 671 tty_wait_until_sent(port->tty, CLOSING_DELAY); 672 } 673*/ 674 675 if (port->tty->driver->flush_buffer) 676 port->tty->driver->flush_buffer(port->tty); 677 tty_ldisc_flush(port->tty); 678 679 firm_report_tx_done(port); 680 681 firm_close(port); 682 683 /* shutdown our bulk reads and writes */ 684 spin_lock_irqsave(&info->lock, flags); 685 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 686 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 687 urb = wrap->urb; 688 usb_kill_urb(urb); 689 list_del(tmp); 690 list_add(tmp, &info->rx_urbs_free); 691 } 692 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) { 693 list_del(tmp); 694 list_add(tmp, &info->rx_urbs_free); 695 } 696 list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) { 697 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 698 urb = wrap->urb; 699 usb_kill_urb(urb); 700 list_del(tmp); 701 list_add(tmp, &info->tx_urbs_free); 702 } 703 spin_unlock_irqrestore(&info->lock, flags); 704 705 stop_command_port(port->serial); 706 707 port->tty->closing = 0; 708} 709 710 711static int whiteheat_write(struct usb_serial_port *port, const unsigned char *buf, int count) 712{ 713 struct usb_serial *serial = port->serial; 714 struct whiteheat_private *info = usb_get_serial_port_data(port); 715 struct whiteheat_urb_wrap *wrap; 716 struct urb *urb; 717 int result; 718 int bytes; 719 int sent = 0; 720 unsigned long flags; 721 struct list_head *tmp; 722 723 dbg("%s - port %d", __FUNCTION__, port->number); 724 725 if (count == 0) { 726 dbg("%s - write request of 0 bytes", __FUNCTION__); 727 return (0); 728 } 729 730 while (count) { 731 spin_lock_irqsave(&info->lock, flags); 732 if (list_empty(&info->tx_urbs_free)) { 733 spin_unlock_irqrestore(&info->lock, flags); 734 break; 735 } 736 tmp = list_first(&info->tx_urbs_free); 737 list_del(tmp); 738 spin_unlock_irqrestore(&info->lock, flags); 739 740 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 741 urb = wrap->urb; 742 bytes = (count > port->bulk_out_size) ? port->bulk_out_size : count; 743 memcpy (urb->transfer_buffer, buf + sent, bytes); 744 745 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, bytes, urb->transfer_buffer); 746 747 urb->dev = serial->dev; 748 urb->transfer_buffer_length = bytes; 749 result = usb_submit_urb(urb, GFP_ATOMIC); 750 if (result) { 751 err("%s - failed submitting write urb, error %d", __FUNCTION__, result); 752 sent = result; 753 spin_lock_irqsave(&info->lock, flags); 754 list_add(tmp, &info->tx_urbs_free); 755 spin_unlock_irqrestore(&info->lock, flags); 756 break; 757 } else { 758 sent += bytes; 759 count -= bytes; 760 spin_lock_irqsave(&info->lock, flags); 761 list_add(tmp, &info->tx_urbs_submitted); 762 spin_unlock_irqrestore(&info->lock, flags); 763 } 764 } 765 766 return sent; 767} 768 769 770static int whiteheat_write_room(struct usb_serial_port *port) 771{ 772 struct whiteheat_private *info = usb_get_serial_port_data(port); 773 struct list_head *tmp; 774 int room = 0; 775 unsigned long flags; 776 777 dbg("%s - port %d", __FUNCTION__, port->number); 778 779 spin_lock_irqsave(&info->lock, flags); 780 list_for_each(tmp, &info->tx_urbs_free) 781 room++; 782 spin_unlock_irqrestore(&info->lock, flags); 783 room *= port->bulk_out_size; 784 785 dbg("%s - returns %d", __FUNCTION__, room); 786 return (room); 787} 788 789 790static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file) 791{ 792 struct whiteheat_private *info = usb_get_serial_port_data(port); 793 unsigned int modem_signals = 0; 794 795 dbg("%s - port %d", __FUNCTION__, port->number); 796 797 firm_get_dtr_rts(port); 798 if (info->mcr & UART_MCR_DTR) 799 modem_signals |= TIOCM_DTR; 800 if (info->mcr & UART_MCR_RTS) 801 modem_signals |= TIOCM_RTS; 802 803 return modem_signals; 804} 805 806 807static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file, 808 unsigned int set, unsigned int clear) 809{ 810 struct whiteheat_private *info = usb_get_serial_port_data(port); 811 812 dbg("%s - port %d", __FUNCTION__, port->number); 813 814 if (set & TIOCM_RTS) 815 info->mcr |= UART_MCR_RTS; 816 if (set & TIOCM_DTR) 817 info->mcr |= UART_MCR_DTR; 818 819 if (clear & TIOCM_RTS) 820 info->mcr &= ~UART_MCR_RTS; 821 if (clear & TIOCM_DTR) 822 info->mcr &= ~UART_MCR_DTR; 823 824 firm_set_dtr(port, info->mcr & UART_MCR_DTR); 825 firm_set_rts(port, info->mcr & UART_MCR_RTS); 826 return 0; 827} 828 829 830static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) 831{ 832 struct serial_struct serstruct; 833 void __user *user_arg = (void __user *)arg; 834 835 dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd); 836 837 switch (cmd) { 838 case TIOCGSERIAL: 839 memset(&serstruct, 0, sizeof(serstruct)); 840 serstruct.type = PORT_16654; 841 serstruct.line = port->serial->minor; 842 serstruct.port = port->number; 843 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 844 serstruct.xmit_fifo_size = port->bulk_out_size; 845 serstruct.custom_divisor = 0; 846 serstruct.baud_base = 460800; 847 serstruct.close_delay = CLOSING_DELAY; 848 serstruct.closing_wait = CLOSING_DELAY; 849 850 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct))) 851 return -EFAULT; 852 853 break; 854 855 case TIOCSSERIAL: 856 if (copy_from_user(&serstruct, user_arg, sizeof(serstruct))) 857 return -EFAULT; 858 859 /* 860 * For now this is ignored. dip sets the ASYNC_[V]HI flags 861 * but this isn't used by us at all. Maybe someone somewhere 862 * will need the custom_divisor setting. 863 */ 864 865 break; 866 867 default: 868 break; 869 } 870 871 return -ENOIOCTLCMD; 872} 873 874 875static void whiteheat_set_termios (struct usb_serial_port *port, struct termios *old_termios) 876{ 877 dbg("%s -port %d", __FUNCTION__, port->number); 878 879 if ((!port->tty) || (!port->tty->termios)) { 880 dbg("%s - no tty structures", __FUNCTION__); 881 goto exit; 882 } 883 884 /* check that they really want us to change something */ 885 if (old_termios) { 886 if ((port->tty->termios->c_cflag == old_termios->c_cflag) && 887 (port->tty->termios->c_iflag == old_termios->c_iflag)) { 888 dbg("%s - nothing to change...", __FUNCTION__); 889 goto exit; 890 } 891 } 892 893 firm_setup_port(port); 894 895exit: 896 return; 897} 898 899 900static void whiteheat_break_ctl(struct usb_serial_port *port, int break_state) { 901 firm_set_break(port, break_state); 902} 903 904 905static int whiteheat_chars_in_buffer(struct usb_serial_port *port) 906{ 907 struct whiteheat_private *info = usb_get_serial_port_data(port); 908 struct list_head *tmp; 909 struct whiteheat_urb_wrap *wrap; 910 int chars = 0; 911 unsigned long flags; 912 913 dbg("%s - port %d", __FUNCTION__, port->number); 914 915 spin_lock_irqsave(&info->lock, flags); 916 list_for_each(tmp, &info->tx_urbs_submitted) { 917 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 918 chars += wrap->urb->transfer_buffer_length; 919 } 920 spin_unlock_irqrestore(&info->lock, flags); 921 922 dbg ("%s - returns %d", __FUNCTION__, chars); 923 return (chars); 924} 925 926 927static void whiteheat_throttle (struct usb_serial_port *port) 928{ 929 struct whiteheat_private *info = usb_get_serial_port_data(port); 930 unsigned long flags; 931 932 dbg("%s - port %d", __FUNCTION__, port->number); 933 934 spin_lock_irqsave(&info->lock, flags); 935 info->flags |= THROTTLED; 936 spin_unlock_irqrestore(&info->lock, flags); 937 938 return; 939} 940 941 942static void whiteheat_unthrottle (struct usb_serial_port *port) 943{ 944 struct whiteheat_private *info = usb_get_serial_port_data(port); 945 int actually_throttled; 946 unsigned long flags; 947 948 dbg("%s - port %d", __FUNCTION__, port->number); 949 950 spin_lock_irqsave(&info->lock, flags); 951 actually_throttled = info->flags & ACTUALLY_THROTTLED; 952 info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED); 953 spin_unlock_irqrestore(&info->lock, flags); 954 955 if (actually_throttled) 956 rx_data_softint(port); 957 958 return; 959} 960 961 962/***************************************************************************** 963 * Connect Tech's White Heat callback routines 964 *****************************************************************************/ 965static void command_port_write_callback (struct urb *urb, struct pt_regs *regs) 966{ 967 dbg("%s", __FUNCTION__); 968 969 if (urb->status) { 970 dbg ("nonzero urb status: %d", urb->status); 971 return; 972 } 973} 974 975 976static void command_port_read_callback (struct urb *urb, struct pt_regs *regs) 977{ 978 struct usb_serial_port *command_port = (struct usb_serial_port *)urb->context; 979 struct whiteheat_command_private *command_info; 980 unsigned char *data = urb->transfer_buffer; 981 int result; 982 unsigned long flags; 983 984 dbg("%s", __FUNCTION__); 985 986 if (urb->status) { 987 dbg("%s - nonzero urb status: %d", __FUNCTION__, urb->status); 988 return; 989 } 990 991 usb_serial_debug_data(debug, &command_port->dev, __FUNCTION__, urb->actual_length, data); 992 993 command_info = usb_get_serial_port_data(command_port); 994 if (!command_info) { 995 dbg ("%s - command_info is NULL, exiting.", __FUNCTION__); 996 return; 997 } 998 spin_lock_irqsave(&command_info->lock, flags); 999 1000 if (data[0] == WHITEHEAT_CMD_COMPLETE) { 1001 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 1002 wake_up_interruptible(&command_info->wait_command); 1003 } else if (data[0] == WHITEHEAT_CMD_FAILURE) { 1004 command_info->command_finished = WHITEHEAT_CMD_FAILURE; 1005 wake_up_interruptible(&command_info->wait_command); 1006 } else if (data[0] == WHITEHEAT_EVENT) { 1007 /* These are unsolicited reports from the firmware, hence no waiting command to wakeup */ 1008 dbg("%s - event received", __FUNCTION__); 1009 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) { 1010 memcpy(command_info->result_buffer, &data[1], urb->actual_length - 1); 1011 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 1012 wake_up_interruptible(&command_info->wait_command); 1013 } else { 1014 dbg("%s - bad reply from firmware", __FUNCTION__); 1015 } 1016 1017 /* Continue trying to always read */ 1018 command_port->read_urb->dev = command_port->serial->dev; 1019 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC); 1020 spin_unlock_irqrestore(&command_info->lock, flags); 1021 if (result) 1022 dbg("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); 1023} 1024 1025 1026static void whiteheat_read_callback(struct urb *urb, struct pt_regs *regs) 1027{ 1028 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 1029 struct whiteheat_urb_wrap *wrap; 1030 unsigned char *data = urb->transfer_buffer; 1031 struct whiteheat_private *info = usb_get_serial_port_data(port); 1032 1033 dbg("%s - port %d", __FUNCTION__, port->number); 1034 1035 spin_lock(&info->lock); 1036 wrap = urb_to_wrap(urb, &info->rx_urbs_submitted); 1037 if (!wrap) { 1038 spin_unlock(&info->lock); 1039 err("%s - Not my urb!", __FUNCTION__); 1040 return; 1041 } 1042 list_del(&wrap->list); 1043 spin_unlock(&info->lock); 1044 1045 if (urb->status) { 1046 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status); 1047 spin_lock(&info->lock); 1048 list_add(&wrap->list, &info->rx_urbs_free); 1049 spin_unlock(&info->lock); 1050 return; 1051 } 1052 1053 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); 1054 1055 spin_lock(&info->lock); 1056 list_add_tail(&wrap->list, &info->rx_urb_q); 1057 if (info->flags & THROTTLED) { 1058 info->flags |= ACTUALLY_THROTTLED; 1059 spin_unlock(&info->lock); 1060 return; 1061 } 1062 spin_unlock(&info->lock); 1063 1064 schedule_work(&info->rx_work); 1065} 1066 1067 1068static void whiteheat_write_callback(struct urb *urb, struct pt_regs *regs) 1069{ 1070 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 1071 struct whiteheat_private *info = usb_get_serial_port_data(port); 1072 struct whiteheat_urb_wrap *wrap; 1073 1074 dbg("%s - port %d", __FUNCTION__, port->number); 1075 1076 spin_lock(&info->lock); 1077 wrap = urb_to_wrap(urb, &info->tx_urbs_submitted); 1078 if (!wrap) { 1079 spin_unlock(&info->lock); 1080 err("%s - Not my urb!", __FUNCTION__); 1081 return; 1082 } 1083 list_del(&wrap->list); 1084 list_add(&wrap->list, &info->tx_urbs_free); 1085 spin_unlock(&info->lock); 1086 1087 if (urb->status) { 1088 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); 1089 return; 1090 } 1091 1092 usb_serial_port_softint((void *)port); 1093 1094 schedule_work(&port->work); 1095} 1096 1097 1098/***************************************************************************** 1099 * Connect Tech's White Heat firmware interface 1100 *****************************************************************************/ 1101static int firm_send_command (struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize) 1102{ 1103 struct usb_serial_port *command_port; 1104 struct whiteheat_command_private *command_info; 1105 struct whiteheat_private *info; 1106 __u8 *transfer_buffer; 1107 int retval = 0; 1108 unsigned long flags; 1109 1110 dbg("%s - command %d", __FUNCTION__, command); 1111 1112 command_port = port->serial->port[COMMAND_PORT]; 1113 command_info = usb_get_serial_port_data(command_port); 1114 spin_lock_irqsave(&command_info->lock, flags); 1115 command_info->command_finished = FALSE; 1116 1117 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer; 1118 transfer_buffer[0] = command; 1119 memcpy (&transfer_buffer[1], data, datasize); 1120 command_port->write_urb->transfer_buffer_length = datasize + 1; 1121 command_port->write_urb->dev = port->serial->dev; 1122 retval = usb_submit_urb (command_port->write_urb, GFP_KERNEL); 1123 if (retval) { 1124 dbg("%s - submit urb failed", __FUNCTION__); 1125 goto exit; 1126 } 1127 spin_unlock_irqrestore(&command_info->lock, flags); 1128 1129 /* wait for the command to complete */ 1130 wait_event_interruptible_timeout(command_info->wait_command, 1131 (command_info->command_finished != FALSE), COMMAND_TIMEOUT); 1132 1133 spin_lock_irqsave(&command_info->lock, flags); 1134 1135 if (command_info->command_finished == FALSE) { 1136 dbg("%s - command timed out.", __FUNCTION__); 1137 retval = -ETIMEDOUT; 1138 goto exit; 1139 } 1140 1141 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) { 1142 dbg("%s - command failed.", __FUNCTION__); 1143 retval = -EIO; 1144 goto exit; 1145 } 1146 1147 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) { 1148 dbg("%s - command completed.", __FUNCTION__); 1149 switch (command) { 1150 case WHITEHEAT_GET_DTR_RTS: 1151 info = usb_get_serial_port_data(port); 1152 memcpy(&info->mcr, command_info->result_buffer, sizeof(struct whiteheat_dr_info)); 1153 break; 1154 } 1155 } 1156 1157exit: 1158 spin_unlock_irqrestore(&command_info->lock, flags); 1159 return retval; 1160} 1161 1162 1163static int firm_open(struct usb_serial_port *port) { 1164 struct whiteheat_simple open_command; 1165 1166 open_command.port = port->number - port->serial->minor + 1; 1167 return firm_send_command(port, WHITEHEAT_OPEN, (__u8 *)&open_command, sizeof(open_command)); 1168} 1169 1170 1171static int firm_close(struct usb_serial_port *port) { 1172 struct whiteheat_simple close_command; 1173 1174 close_command.port = port->number - port->serial->minor + 1; 1175 return firm_send_command(port, WHITEHEAT_CLOSE, (__u8 *)&close_command, sizeof(close_command)); 1176} 1177 1178 1179static int firm_setup_port(struct usb_serial_port *port) { 1180 struct whiteheat_port_settings port_settings; 1181 unsigned int cflag = port->tty->termios->c_cflag; 1182 1183 port_settings.port = port->number + 1; 1184 1185 /* get the byte size */ 1186 switch (cflag & CSIZE) { 1187 case CS5: port_settings.bits = 5; break; 1188 case CS6: port_settings.bits = 6; break; 1189 case CS7: port_settings.bits = 7; break; 1190 default: 1191 case CS8: port_settings.bits = 8; break; 1192 } 1193 dbg("%s - data bits = %d", __FUNCTION__, port_settings.bits); 1194 1195 /* determine the parity */ 1196 if (cflag & PARENB) 1197 if (cflag & CMSPAR) 1198 if (cflag & PARODD) 1199 port_settings.parity = WHITEHEAT_PAR_MARK; 1200 else 1201 port_settings.parity = WHITEHEAT_PAR_SPACE; 1202 else 1203 if (cflag & PARODD) 1204 port_settings.parity = WHITEHEAT_PAR_ODD; 1205 else 1206 port_settings.parity = WHITEHEAT_PAR_EVEN; 1207 else 1208 port_settings.parity = WHITEHEAT_PAR_NONE; 1209 dbg("%s - parity = %c", __FUNCTION__, port_settings.parity); 1210 1211 /* figure out the stop bits requested */ 1212 if (cflag & CSTOPB) 1213 port_settings.stop = 2; 1214 else 1215 port_settings.stop = 1; 1216 dbg("%s - stop bits = %d", __FUNCTION__, port_settings.stop); 1217 1218 /* figure out the flow control settings */ 1219 if (cflag & CRTSCTS) 1220 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | WHITEHEAT_HFLOW_RTS); 1221 else 1222 port_settings.hflow = WHITEHEAT_HFLOW_NONE; 1223 dbg("%s - hardware flow control = %s %s %s %s", __FUNCTION__, 1224 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "", 1225 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "", 1226 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "", 1227 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : ""); 1228 1229 /* determine software flow control */ 1230 if (I_IXOFF(port->tty)) 1231 port_settings.sflow = WHITEHEAT_SFLOW_RXTX; 1232 else 1233 port_settings.sflow = WHITEHEAT_SFLOW_NONE; 1234 dbg("%s - software flow control = %c", __FUNCTION__, port_settings.sflow); 1235 1236 port_settings.xon = START_CHAR(port->tty); 1237 port_settings.xoff = STOP_CHAR(port->tty); 1238 dbg("%s - XON = %2x, XOFF = %2x", __FUNCTION__, port_settings.xon, port_settings.xoff); 1239 1240 /* get the baud rate wanted */ 1241 port_settings.baud = tty_get_baud_rate(port->tty); 1242 dbg("%s - baud rate = %d", __FUNCTION__, port_settings.baud); 1243 1244 /* handle any settings that aren't specified in the tty structure */ 1245 port_settings.lloop = 0; 1246 1247 /* now send the message to the device */ 1248 return firm_send_command(port, WHITEHEAT_SETUP_PORT, (__u8 *)&port_settings, sizeof(port_settings)); 1249} 1250 1251 1252static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) { 1253 struct whiteheat_set_rdb rts_command; 1254 1255 rts_command.port = port->number - port->serial->minor + 1; 1256 rts_command.state = onoff; 1257 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&rts_command, sizeof(rts_command)); 1258} 1259 1260 1261static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) { 1262 struct whiteheat_set_rdb dtr_command; 1263 1264 dtr_command.port = port->number - port->serial->minor + 1; 1265 dtr_command.state = onoff; 1266 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&dtr_command, sizeof(dtr_command)); 1267} 1268 1269 1270static int firm_set_break(struct usb_serial_port *port, __u8 onoff) { 1271 struct whiteheat_set_rdb break_command; 1272 1273 break_command.port = port->number - port->serial->minor + 1; 1274 break_command.state = onoff; 1275 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&break_command, sizeof(break_command)); 1276} 1277 1278 1279static int firm_purge(struct usb_serial_port *port, __u8 rxtx) { 1280 struct whiteheat_purge purge_command; 1281 1282 purge_command.port = port->number - port->serial->minor + 1; 1283 purge_command.what = rxtx; 1284 return firm_send_command(port, WHITEHEAT_PURGE, (__u8 *)&purge_command, sizeof(purge_command)); 1285} 1286 1287 1288static int firm_get_dtr_rts(struct usb_serial_port *port) { 1289 struct whiteheat_simple get_dr_command; 1290 1291 get_dr_command.port = port->number - port->serial->minor + 1; 1292 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, (__u8 *)&get_dr_command, sizeof(get_dr_command)); 1293} 1294 1295 1296static int firm_report_tx_done(struct usb_serial_port *port) { 1297 struct whiteheat_simple close_command; 1298 1299 close_command.port = port->number - port->serial->minor + 1; 1300 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, (__u8 *)&close_command, sizeof(close_command)); 1301} 1302 1303 1304/***************************************************************************** 1305 * Connect Tech's White Heat utility functions 1306 *****************************************************************************/ 1307static int start_command_port(struct usb_serial *serial) 1308{ 1309 struct usb_serial_port *command_port; 1310 struct whiteheat_command_private *command_info; 1311 unsigned long flags; 1312 int retval = 0; 1313 1314 command_port = serial->port[COMMAND_PORT]; 1315 command_info = usb_get_serial_port_data(command_port); 1316 spin_lock_irqsave(&command_info->lock, flags); 1317 if (!command_info->port_running) { 1318 /* Work around HCD bugs */ 1319 usb_clear_halt(serial->dev, command_port->read_urb->pipe); 1320 1321 command_port->read_urb->dev = serial->dev; 1322 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL); 1323 if (retval) { 1324 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval); 1325 goto exit; 1326 } 1327 } 1328 command_info->port_running++; 1329 1330exit: 1331 spin_unlock_irqrestore(&command_info->lock, flags); 1332 return retval; 1333} 1334 1335 1336static void stop_command_port(struct usb_serial *serial) 1337{ 1338 struct usb_serial_port *command_port; 1339 struct whiteheat_command_private *command_info; 1340 unsigned long flags; 1341 1342 command_port = serial->port[COMMAND_PORT]; 1343 command_info = usb_get_serial_port_data(command_port); 1344 spin_lock_irqsave(&command_info->lock, flags); 1345 command_info->port_running--; 1346 if (!command_info->port_running) 1347 usb_kill_urb(command_port->read_urb); 1348 spin_unlock_irqrestore(&command_info->lock, flags); 1349} 1350 1351 1352static int start_port_read(struct usb_serial_port *port) 1353{ 1354 struct whiteheat_private *info = usb_get_serial_port_data(port); 1355 struct whiteheat_urb_wrap *wrap; 1356 struct urb *urb; 1357 int retval = 0; 1358 unsigned long flags; 1359 struct list_head *tmp; 1360 struct list_head *tmp2; 1361 1362 spin_lock_irqsave(&info->lock, flags); 1363 1364 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 1365 list_del(tmp); 1366 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1367 urb = wrap->urb; 1368 urb->dev = port->serial->dev; 1369 retval = usb_submit_urb(urb, GFP_KERNEL); 1370 if (retval) { 1371 list_add(tmp, &info->rx_urbs_free); 1372 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 1373 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1374 urb = wrap->urb; 1375 usb_kill_urb(urb); 1376 list_del(tmp); 1377 list_add(tmp, &info->rx_urbs_free); 1378 } 1379 break; 1380 } 1381 list_add(tmp, &info->rx_urbs_submitted); 1382 } 1383 1384 spin_unlock_irqrestore(&info->lock, flags); 1385 1386 return retval; 1387} 1388 1389 1390static struct whiteheat_urb_wrap *urb_to_wrap(struct urb* urb, struct list_head *head) 1391{ 1392 struct whiteheat_urb_wrap *wrap; 1393 struct list_head *tmp; 1394 1395 list_for_each(tmp, head) { 1396 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1397 if (wrap->urb == urb) 1398 return wrap; 1399 } 1400 1401 return NULL; 1402} 1403 1404 1405static struct list_head *list_first(struct list_head *head) 1406{ 1407 return head->next; 1408} 1409 1410 1411static void rx_data_softint(void *private) 1412{ 1413 struct usb_serial_port *port = (struct usb_serial_port *)private; 1414 struct whiteheat_private *info = usb_get_serial_port_data(port); 1415 struct tty_struct *tty = port->tty; 1416 struct whiteheat_urb_wrap *wrap; 1417 struct urb *urb; 1418 unsigned long flags; 1419 struct list_head *tmp; 1420 struct list_head *tmp2; 1421 int result; 1422 int sent = 0; 1423 1424 spin_lock_irqsave(&info->lock, flags); 1425 if (info->flags & THROTTLED) { 1426 spin_unlock_irqrestore(&info->lock, flags); 1427 return; 1428 } 1429 1430 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) { 1431 list_del(tmp); 1432 spin_unlock_irqrestore(&info->lock, flags); 1433 1434 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1435 urb = wrap->urb; 1436 1437 if (tty && urb->actual_length) { 1438 if (urb->actual_length > TTY_FLIPBUF_SIZE - tty->flip.count) { 1439 spin_lock_irqsave(&info->lock, flags); 1440 list_add(tmp, &info->rx_urb_q); 1441 spin_unlock_irqrestore(&info->lock, flags); 1442 tty_flip_buffer_push(tty); 1443 schedule_work(&info->rx_work); 1444 return; 1445 } 1446 1447 memcpy(tty->flip.char_buf_ptr, urb->transfer_buffer, urb->actual_length); 1448 tty->flip.char_buf_ptr += urb->actual_length; 1449 tty->flip.count += urb->actual_length; 1450 sent += urb->actual_length; 1451 } 1452 1453 urb->dev = port->serial->dev; 1454 result = usb_submit_urb(urb, GFP_ATOMIC); 1455 if (result) { 1456 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); 1457 spin_lock_irqsave(&info->lock, flags); 1458 list_add(tmp, &info->rx_urbs_free); 1459 continue; 1460 } 1461 1462 spin_lock_irqsave(&info->lock, flags); 1463 list_add(tmp, &info->rx_urbs_submitted); 1464 } 1465 spin_unlock_irqrestore(&info->lock, flags); 1466 1467 if (sent) 1468 tty_flip_buffer_push(tty); 1469} 1470 1471 1472/***************************************************************************** 1473 * Connect Tech's White Heat module functions 1474 *****************************************************************************/ 1475static int __init whiteheat_init (void) 1476{ 1477 int retval; 1478 retval = usb_serial_register(&whiteheat_fake_device); 1479 if (retval) 1480 goto failed_fake_register; 1481 retval = usb_serial_register(&whiteheat_device); 1482 if (retval) 1483 goto failed_device_register; 1484 retval = usb_register(&whiteheat_driver); 1485 if (retval) 1486 goto failed_usb_register; 1487 info(DRIVER_DESC " " DRIVER_VERSION); 1488 return 0; 1489failed_usb_register: 1490 usb_serial_deregister(&whiteheat_device); 1491failed_device_register: 1492 usb_serial_deregister(&whiteheat_fake_device); 1493failed_fake_register: 1494 return retval; 1495} 1496 1497 1498static void __exit whiteheat_exit (void) 1499{ 1500 usb_deregister (&whiteheat_driver); 1501 usb_serial_deregister (&whiteheat_fake_device); 1502 usb_serial_deregister (&whiteheat_device); 1503} 1504 1505 1506module_init(whiteheat_init); 1507module_exit(whiteheat_exit); 1508 1509MODULE_AUTHOR( DRIVER_AUTHOR ); 1510MODULE_DESCRIPTION( DRIVER_DESC ); 1511MODULE_LICENSE("GPL"); 1512 1513module_param(urb_pool_size, int, 0); 1514MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering"); 1515 1516module_param(debug, bool, S_IRUGO | S_IWUSR); 1517MODULE_PARM_DESC(debug, "Debug enabled or not"); 1518