whiteheat.c revision 33f0f88f1c51ae5c2d593d26960c760ea154c2e2
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 .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 termios * 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, struct pt_regs *regs); 157static void whiteheat_write_callback (struct urb *urb, struct pt_regs *regs); 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 .id_table = id_table_prerenumeration, 166 .num_interrupt_in = NUM_DONT_CARE, 167 .num_bulk_in = NUM_DONT_CARE, 168 .num_bulk_out = NUM_DONT_CARE, 169 .num_ports = 1, 170 .probe = whiteheat_firmware_download, 171 .attach = whiteheat_firmware_attach, 172}; 173 174static struct usb_serial_driver whiteheat_device = { 175 .driver = { 176 .owner = THIS_MODULE, 177 .name = "whiteheat", 178 }, 179 .description = "Connect Tech - WhiteHEAT", 180 .id_table = id_table_std, 181 .num_interrupt_in = NUM_DONT_CARE, 182 .num_bulk_in = NUM_DONT_CARE, 183 .num_bulk_out = NUM_DONT_CARE, 184 .num_ports = 4, 185 .attach = whiteheat_attach, 186 .shutdown = whiteheat_shutdown, 187 .open = whiteheat_open, 188 .close = whiteheat_close, 189 .write = whiteheat_write, 190 .write_room = whiteheat_write_room, 191 .ioctl = whiteheat_ioctl, 192 .set_termios = whiteheat_set_termios, 193 .break_ctl = whiteheat_break_ctl, 194 .tiocmget = whiteheat_tiocmget, 195 .tiocmset = whiteheat_tiocmset, 196 .chars_in_buffer = whiteheat_chars_in_buffer, 197 .throttle = whiteheat_throttle, 198 .unthrottle = whiteheat_unthrottle, 199 .read_bulk_callback = whiteheat_read_callback, 200 .write_bulk_callback = whiteheat_write_callback, 201}; 202 203 204struct whiteheat_command_private { 205 spinlock_t lock; 206 __u8 port_running; 207 __u8 command_finished; 208 wait_queue_head_t wait_command; /* for handling sleeping while waiting for a command to finish */ 209 __u8 result_buffer[64]; 210}; 211 212 213#define THROTTLED 0x01 214#define ACTUALLY_THROTTLED 0x02 215 216static int urb_pool_size = 8; 217 218struct whiteheat_urb_wrap { 219 struct list_head list; 220 struct urb *urb; 221}; 222 223struct whiteheat_private { 224 spinlock_t lock; 225 __u8 flags; 226 __u8 mcr; 227 struct list_head rx_urbs_free; 228 struct list_head rx_urbs_submitted; 229 struct list_head rx_urb_q; 230 struct work_struct rx_work; 231 struct list_head tx_urbs_free; 232 struct list_head tx_urbs_submitted; 233}; 234 235 236/* local function prototypes */ 237static int start_command_port(struct usb_serial *serial); 238static void stop_command_port(struct usb_serial *serial); 239static void command_port_write_callback(struct urb *urb, struct pt_regs *regs); 240static void command_port_read_callback(struct urb *urb, struct pt_regs *regs); 241 242static int start_port_read(struct usb_serial_port *port); 243static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, struct list_head *head); 244static struct list_head *list_first(struct list_head *head); 245static void rx_data_softint(void *private); 246 247static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize); 248static int firm_open(struct usb_serial_port *port); 249static int firm_close(struct usb_serial_port *port); 250static int firm_setup_port(struct usb_serial_port *port); 251static int firm_set_rts(struct usb_serial_port *port, __u8 onoff); 252static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff); 253static int firm_set_break(struct usb_serial_port *port, __u8 onoff); 254static int firm_purge(struct usb_serial_port *port, __u8 rxtx); 255static int firm_get_dtr_rts(struct usb_serial_port *port); 256static int firm_report_tx_done(struct usb_serial_port *port); 257 258 259#define COMMAND_PORT 4 260#define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */ 261#define COMMAND_TIMEOUT_MS 2000 262#define CLOSING_DELAY (30 * HZ) 263 264 265/***************************************************************************** 266 * Connect Tech's White Heat prerenumeration driver functions 267 *****************************************************************************/ 268 269/* steps to download the firmware to the WhiteHEAT device: 270 - hold the reset (by writing to the reset bit of the CPUCS register) 271 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD 272 - release the reset (by writing to the CPUCS register) 273 - download the WH.HEX file for all addresses greater than 0x1b3f using 274 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD 275 - hold the reset 276 - download the WH.HEX file for all addresses less than 0x1b40 using 277 VENDOR_REQUEST_ANCHOR_LOAD 278 - release the reset 279 - device renumerated itself and comes up as new device id with all 280 firmware download completed. 281*/ 282static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id) 283{ 284 int response; 285 const struct whiteheat_hex_record *record; 286 287 dbg("%s", __FUNCTION__); 288 289 response = ezusb_set_reset (serial, 1); 290 291 record = &whiteheat_loader[0]; 292 while (record->address != 0xffff) { 293 response = ezusb_writememory (serial, record->address, 294 (unsigned char *)record->data, record->data_size, 0xa0); 295 if (response < 0) { 296 err("%s - ezusb_writememory failed for loader (%d %04X %p %d)", 297 __FUNCTION__, response, record->address, record->data, record->data_size); 298 break; 299 } 300 ++record; 301 } 302 303 response = ezusb_set_reset (serial, 0); 304 305 record = &whiteheat_firmware[0]; 306 while (record->address < 0x1b40) { 307 ++record; 308 } 309 while (record->address != 0xffff) { 310 response = ezusb_writememory (serial, record->address, 311 (unsigned char *)record->data, record->data_size, 0xa3); 312 if (response < 0) { 313 err("%s - ezusb_writememory failed for first firmware step (%d %04X %p %d)", 314 __FUNCTION__, response, record->address, record->data, record->data_size); 315 break; 316 } 317 ++record; 318 } 319 320 response = ezusb_set_reset (serial, 1); 321 322 record = &whiteheat_firmware[0]; 323 while (record->address < 0x1b40) { 324 response = ezusb_writememory (serial, record->address, 325 (unsigned char *)record->data, record->data_size, 0xa0); 326 if (response < 0) { 327 err("%s - ezusb_writememory failed for second firmware step (%d %04X %p %d)", 328 __FUNCTION__, response, record->address, record->data, record->data_size); 329 break; 330 } 331 ++record; 332 } 333 334 response = ezusb_set_reset (serial, 0); 335 336 return 0; 337} 338 339 340static int whiteheat_firmware_attach (struct usb_serial *serial) 341{ 342 /* We want this device to fail to have a driver assigned to it */ 343 return 1; 344} 345 346 347/***************************************************************************** 348 * Connect Tech's White Heat serial driver functions 349 *****************************************************************************/ 350static int whiteheat_attach (struct usb_serial *serial) 351{ 352 struct usb_serial_port *command_port; 353 struct whiteheat_command_private *command_info; 354 struct usb_serial_port *port; 355 struct whiteheat_private *info; 356 struct whiteheat_hw_info *hw_info; 357 int pipe; 358 int ret; 359 int alen; 360 __u8 *command; 361 __u8 *result; 362 int i; 363 int j; 364 struct urb *urb; 365 int buf_size; 366 struct whiteheat_urb_wrap *wrap; 367 struct list_head *tmp; 368 369 command_port = serial->port[COMMAND_PORT]; 370 371 pipe = usb_sndbulkpipe (serial->dev, command_port->bulk_out_endpointAddress); 372 command = kmalloc(2, GFP_KERNEL); 373 if (!command) 374 goto no_command_buffer; 375 command[0] = WHITEHEAT_GET_HW_INFO; 376 command[1] = 0; 377 378 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL); 379 if (!result) 380 goto no_result_buffer; 381 /* 382 * When the module is reloaded the firmware is still there and 383 * the endpoints are still in the usb core unchanged. This is the 384 * unlinking bug in disguise. Same for the call below. 385 */ 386 usb_clear_halt(serial->dev, pipe); 387 ret = usb_bulk_msg (serial->dev, pipe, command, 2, &alen, COMMAND_TIMEOUT_MS); 388 if (ret) { 389 err("%s: Couldn't send command [%d]", serial->type->description, ret); 390 goto no_firmware; 391 } else if (alen != sizeof(command)) { 392 err("%s: Send command incomplete [%d]", serial->type->description, alen); 393 goto no_firmware; 394 } 395 396 pipe = usb_rcvbulkpipe (serial->dev, command_port->bulk_in_endpointAddress); 397 /* See the comment on the usb_clear_halt() above */ 398 usb_clear_halt(serial->dev, pipe); 399 ret = usb_bulk_msg (serial->dev, pipe, result, sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS); 400 if (ret) { 401 err("%s: Couldn't get results [%d]", serial->type->description, ret); 402 goto no_firmware; 403 } else if (alen != sizeof(result)) { 404 err("%s: Get results incomplete [%d]", serial->type->description, alen); 405 goto no_firmware; 406 } else if (result[0] != command[0]) { 407 err("%s: Command failed [%d]", serial->type->description, result[0]); 408 goto no_firmware; 409 } 410 411 hw_info = (struct whiteheat_hw_info *)&result[1]; 412 413 info("%s: Driver %s: Firmware v%d.%02d", serial->type->description, 414 DRIVER_VERSION, hw_info->sw_major_rev, hw_info->sw_minor_rev); 415 416 for (i = 0; i < serial->num_ports; i++) { 417 port = serial->port[i]; 418 419 info = (struct whiteheat_private *)kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL); 420 if (info == NULL) { 421 err("%s: Out of memory for port structures\n", serial->type->description); 422 goto no_private; 423 } 424 425 spin_lock_init(&info->lock); 426 info->flags = 0; 427 info->mcr = 0; 428 INIT_WORK(&info->rx_work, rx_data_softint, port); 429 430 INIT_LIST_HEAD(&info->rx_urbs_free); 431 INIT_LIST_HEAD(&info->rx_urbs_submitted); 432 INIT_LIST_HEAD(&info->rx_urb_q); 433 INIT_LIST_HEAD(&info->tx_urbs_free); 434 INIT_LIST_HEAD(&info->tx_urbs_submitted); 435 436 for (j = 0; j < urb_pool_size; j++) { 437 urb = usb_alloc_urb(0, GFP_KERNEL); 438 if (!urb) { 439 err("No free urbs available"); 440 goto no_rx_urb; 441 } 442 buf_size = port->read_urb->transfer_buffer_length; 443 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 444 if (!urb->transfer_buffer) { 445 err("Couldn't allocate urb buffer"); 446 goto no_rx_buf; 447 } 448 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 449 if (!wrap) { 450 err("Couldn't allocate urb wrapper"); 451 goto no_rx_wrap; 452 } 453 usb_fill_bulk_urb(urb, serial->dev, 454 usb_rcvbulkpipe(serial->dev, 455 port->bulk_in_endpointAddress), 456 urb->transfer_buffer, buf_size, 457 whiteheat_read_callback, port); 458 wrap->urb = urb; 459 list_add(&wrap->list, &info->rx_urbs_free); 460 461 urb = usb_alloc_urb(0, GFP_KERNEL); 462 if (!urb) { 463 err("No free urbs available"); 464 goto no_tx_urb; 465 } 466 buf_size = port->write_urb->transfer_buffer_length; 467 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 468 if (!urb->transfer_buffer) { 469 err("Couldn't allocate urb buffer"); 470 goto no_tx_buf; 471 } 472 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 473 if (!wrap) { 474 err("Couldn't allocate urb wrapper"); 475 goto no_tx_wrap; 476 } 477 usb_fill_bulk_urb(urb, serial->dev, 478 usb_sndbulkpipe(serial->dev, 479 port->bulk_out_endpointAddress), 480 urb->transfer_buffer, buf_size, 481 whiteheat_write_callback, port); 482 wrap->urb = urb; 483 list_add(&wrap->list, &info->tx_urbs_free); 484 } 485 486 usb_set_serial_port_data(port, info); 487 } 488 489 command_info = (struct whiteheat_command_private *)kmalloc(sizeof(struct whiteheat_command_private), GFP_KERNEL); 490 if (command_info == NULL) { 491 err("%s: Out of memory for port structures\n", serial->type->description); 492 goto no_command_private; 493 } 494 495 spin_lock_init(&command_info->lock); 496 command_info->port_running = 0; 497 init_waitqueue_head(&command_info->wait_command); 498 usb_set_serial_port_data(command_port, command_info); 499 command_port->write_urb->complete = command_port_write_callback; 500 command_port->read_urb->complete = command_port_read_callback; 501 kfree(result); 502 kfree(command); 503 504 return 0; 505 506no_firmware: 507 /* Firmware likely not running */ 508 err("%s: Unable to retrieve firmware version, try replugging\n", serial->type->description); 509 err("%s: If the firmware is not running (status led not blinking)\n", serial->type->description); 510 err("%s: please contact support@connecttech.com\n", serial->type->description); 511 return -ENODEV; 512 513no_command_private: 514 for (i = serial->num_ports - 1; i >= 0; i--) { 515 port = serial->port[i]; 516 info = usb_get_serial_port_data(port); 517 for (j = urb_pool_size - 1; j >= 0; j--) { 518 tmp = list_first(&info->tx_urbs_free); 519 list_del(tmp); 520 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 521 urb = wrap->urb; 522 kfree(wrap); 523no_tx_wrap: 524 kfree(urb->transfer_buffer); 525no_tx_buf: 526 usb_free_urb(urb); 527no_tx_urb: 528 tmp = list_first(&info->rx_urbs_free); 529 list_del(tmp); 530 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 531 urb = wrap->urb; 532 kfree(wrap); 533no_rx_wrap: 534 kfree(urb->transfer_buffer); 535no_rx_buf: 536 usb_free_urb(urb); 537no_rx_urb: 538 ; 539 } 540 kfree(info); 541no_private: 542 ; 543 } 544 kfree(result); 545no_result_buffer: 546 kfree(command); 547no_command_buffer: 548 return -ENOMEM; 549} 550 551 552static void whiteheat_shutdown (struct usb_serial *serial) 553{ 554 struct usb_serial_port *command_port; 555 struct usb_serial_port *port; 556 struct whiteheat_private *info; 557 struct whiteheat_urb_wrap *wrap; 558 struct urb *urb; 559 struct list_head *tmp; 560 struct list_head *tmp2; 561 int i; 562 563 dbg("%s", __FUNCTION__); 564 565 /* free up our private data for our command port */ 566 command_port = serial->port[COMMAND_PORT]; 567 kfree (usb_get_serial_port_data(command_port)); 568 569 for (i = 0; i < serial->num_ports; i++) { 570 port = serial->port[i]; 571 info = usb_get_serial_port_data(port); 572 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 573 list_del(tmp); 574 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 575 urb = wrap->urb; 576 kfree(wrap); 577 kfree(urb->transfer_buffer); 578 usb_free_urb(urb); 579 } 580 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) { 581 list_del(tmp); 582 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 583 urb = wrap->urb; 584 kfree(wrap); 585 kfree(urb->transfer_buffer); 586 usb_free_urb(urb); 587 } 588 kfree(info); 589 } 590 591 return; 592} 593 594 595static int whiteheat_open (struct usb_serial_port *port, struct file *filp) 596{ 597 int retval = 0; 598 struct termios old_term; 599 600 dbg("%s - port %d", __FUNCTION__, port->number); 601 602 retval = start_command_port(port->serial); 603 if (retval) 604 goto exit; 605 606 if (port->tty) 607 port->tty->low_latency = 1; 608 609 /* send an open port command */ 610 retval = firm_open(port); 611 if (retval) { 612 stop_command_port(port->serial); 613 goto exit; 614 } 615 616 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX); 617 if (retval) { 618 firm_close(port); 619 stop_command_port(port->serial); 620 goto exit; 621 } 622 623 old_term.c_cflag = ~port->tty->termios->c_cflag; 624 old_term.c_iflag = ~port->tty->termios->c_iflag; 625 whiteheat_set_termios(port, &old_term); 626 627 /* Work around HCD bugs */ 628 usb_clear_halt(port->serial->dev, port->read_urb->pipe); 629 usb_clear_halt(port->serial->dev, port->write_urb->pipe); 630 631 /* Start reading from the device */ 632 retval = start_port_read(port); 633 if (retval) { 634 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval); 635 firm_close(port); 636 stop_command_port(port->serial); 637 goto exit; 638 } 639 640exit: 641 dbg("%s - exit, retval = %d", __FUNCTION__, retval); 642 return retval; 643} 644 645 646static void whiteheat_close(struct usb_serial_port *port, struct file * filp) 647{ 648 struct whiteheat_private *info = usb_get_serial_port_data(port); 649 struct whiteheat_urb_wrap *wrap; 650 struct urb *urb; 651 struct list_head *tmp; 652 struct list_head *tmp2; 653 unsigned long flags; 654 655 dbg("%s - port %d", __FUNCTION__, port->number); 656 657 /* filp is NULL when called from usb_serial_disconnect */ 658 if (filp && (tty_hung_up_p(filp))) { 659 return; 660 } 661 662 port->tty->closing = 1; 663 664/* 665 * Not currently in use; tty_wait_until_sent() calls 666 * serial_chars_in_buffer() which deadlocks on the second semaphore 667 * acquisition. This should be fixed at some point. Greg's been 668 * notified. 669 if ((filp->f_flags & (O_NDELAY | O_NONBLOCK)) == 0) { 670 tty_wait_until_sent(port->tty, CLOSING_DELAY); 671 } 672*/ 673 674 if (port->tty->driver->flush_buffer) 675 port->tty->driver->flush_buffer(port->tty); 676 tty_ldisc_flush(port->tty); 677 678 firm_report_tx_done(port); 679 680 firm_close(port); 681 682 /* shutdown our bulk reads and writes */ 683 spin_lock_irqsave(&info->lock, flags); 684 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 685 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 686 urb = wrap->urb; 687 usb_kill_urb(urb); 688 list_del(tmp); 689 list_add(tmp, &info->rx_urbs_free); 690 } 691 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) { 692 list_del(tmp); 693 list_add(tmp, &info->rx_urbs_free); 694 } 695 list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) { 696 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 697 urb = wrap->urb; 698 usb_kill_urb(urb); 699 list_del(tmp); 700 list_add(tmp, &info->tx_urbs_free); 701 } 702 spin_unlock_irqrestore(&info->lock, flags); 703 704 stop_command_port(port->serial); 705 706 port->tty->closing = 0; 707} 708 709 710static int whiteheat_write(struct usb_serial_port *port, const unsigned char *buf, int count) 711{ 712 struct usb_serial *serial = port->serial; 713 struct whiteheat_private *info = usb_get_serial_port_data(port); 714 struct whiteheat_urb_wrap *wrap; 715 struct urb *urb; 716 int result; 717 int bytes; 718 int sent = 0; 719 unsigned long flags; 720 struct list_head *tmp; 721 722 dbg("%s - port %d", __FUNCTION__, port->number); 723 724 if (count == 0) { 725 dbg("%s - write request of 0 bytes", __FUNCTION__); 726 return (0); 727 } 728 729 while (count) { 730 spin_lock_irqsave(&info->lock, flags); 731 if (list_empty(&info->tx_urbs_free)) { 732 spin_unlock_irqrestore(&info->lock, flags); 733 break; 734 } 735 tmp = list_first(&info->tx_urbs_free); 736 list_del(tmp); 737 spin_unlock_irqrestore(&info->lock, flags); 738 739 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 740 urb = wrap->urb; 741 bytes = (count > port->bulk_out_size) ? port->bulk_out_size : count; 742 memcpy (urb->transfer_buffer, buf + sent, bytes); 743 744 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, bytes, urb->transfer_buffer); 745 746 urb->dev = serial->dev; 747 urb->transfer_buffer_length = bytes; 748 result = usb_submit_urb(urb, GFP_ATOMIC); 749 if (result) { 750 err("%s - failed submitting write urb, error %d", __FUNCTION__, result); 751 sent = result; 752 spin_lock_irqsave(&info->lock, flags); 753 list_add(tmp, &info->tx_urbs_free); 754 spin_unlock_irqrestore(&info->lock, flags); 755 break; 756 } else { 757 sent += bytes; 758 count -= bytes; 759 spin_lock_irqsave(&info->lock, flags); 760 list_add(tmp, &info->tx_urbs_submitted); 761 spin_unlock_irqrestore(&info->lock, flags); 762 } 763 } 764 765 return sent; 766} 767 768 769static int whiteheat_write_room(struct usb_serial_port *port) 770{ 771 struct whiteheat_private *info = usb_get_serial_port_data(port); 772 struct list_head *tmp; 773 int room = 0; 774 unsigned long flags; 775 776 dbg("%s - port %d", __FUNCTION__, port->number); 777 778 spin_lock_irqsave(&info->lock, flags); 779 list_for_each(tmp, &info->tx_urbs_free) 780 room++; 781 spin_unlock_irqrestore(&info->lock, flags); 782 room *= port->bulk_out_size; 783 784 dbg("%s - returns %d", __FUNCTION__, room); 785 return (room); 786} 787 788 789static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file) 790{ 791 struct whiteheat_private *info = usb_get_serial_port_data(port); 792 unsigned int modem_signals = 0; 793 794 dbg("%s - port %d", __FUNCTION__, port->number); 795 796 firm_get_dtr_rts(port); 797 if (info->mcr & UART_MCR_DTR) 798 modem_signals |= TIOCM_DTR; 799 if (info->mcr & UART_MCR_RTS) 800 modem_signals |= TIOCM_RTS; 801 802 return modem_signals; 803} 804 805 806static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file, 807 unsigned int set, unsigned int clear) 808{ 809 struct whiteheat_private *info = usb_get_serial_port_data(port); 810 811 dbg("%s - port %d", __FUNCTION__, port->number); 812 813 if (set & TIOCM_RTS) 814 info->mcr |= UART_MCR_RTS; 815 if (set & TIOCM_DTR) 816 info->mcr |= UART_MCR_DTR; 817 818 if (clear & TIOCM_RTS) 819 info->mcr &= ~UART_MCR_RTS; 820 if (clear & TIOCM_DTR) 821 info->mcr &= ~UART_MCR_DTR; 822 823 firm_set_dtr(port, info->mcr & UART_MCR_DTR); 824 firm_set_rts(port, info->mcr & UART_MCR_RTS); 825 return 0; 826} 827 828 829static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) 830{ 831 struct serial_struct serstruct; 832 void __user *user_arg = (void __user *)arg; 833 834 dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd); 835 836 switch (cmd) { 837 case TIOCGSERIAL: 838 memset(&serstruct, 0, sizeof(serstruct)); 839 serstruct.type = PORT_16654; 840 serstruct.line = port->serial->minor; 841 serstruct.port = port->number; 842 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 843 serstruct.xmit_fifo_size = port->bulk_out_size; 844 serstruct.custom_divisor = 0; 845 serstruct.baud_base = 460800; 846 serstruct.close_delay = CLOSING_DELAY; 847 serstruct.closing_wait = CLOSING_DELAY; 848 849 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct))) 850 return -EFAULT; 851 852 break; 853 854 case TIOCSSERIAL: 855 if (copy_from_user(&serstruct, user_arg, sizeof(serstruct))) 856 return -EFAULT; 857 858 /* 859 * For now this is ignored. dip sets the ASYNC_[V]HI flags 860 * but this isn't used by us at all. Maybe someone somewhere 861 * will need the custom_divisor setting. 862 */ 863 864 break; 865 866 default: 867 break; 868 } 869 870 return -ENOIOCTLCMD; 871} 872 873 874static void whiteheat_set_termios (struct usb_serial_port *port, struct termios *old_termios) 875{ 876 dbg("%s -port %d", __FUNCTION__, port->number); 877 878 if ((!port->tty) || (!port->tty->termios)) { 879 dbg("%s - no tty structures", __FUNCTION__); 880 goto exit; 881 } 882 883 /* check that they really want us to change something */ 884 if (old_termios) { 885 if ((port->tty->termios->c_cflag == old_termios->c_cflag) && 886 (port->tty->termios->c_iflag == old_termios->c_iflag)) { 887 dbg("%s - nothing to change...", __FUNCTION__); 888 goto exit; 889 } 890 } 891 892 firm_setup_port(port); 893 894exit: 895 return; 896} 897 898 899static void whiteheat_break_ctl(struct usb_serial_port *port, int break_state) { 900 firm_set_break(port, break_state); 901} 902 903 904static int whiteheat_chars_in_buffer(struct usb_serial_port *port) 905{ 906 struct whiteheat_private *info = usb_get_serial_port_data(port); 907 struct list_head *tmp; 908 struct whiteheat_urb_wrap *wrap; 909 int chars = 0; 910 unsigned long flags; 911 912 dbg("%s - port %d", __FUNCTION__, port->number); 913 914 spin_lock_irqsave(&info->lock, flags); 915 list_for_each(tmp, &info->tx_urbs_submitted) { 916 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 917 chars += wrap->urb->transfer_buffer_length; 918 } 919 spin_unlock_irqrestore(&info->lock, flags); 920 921 dbg ("%s - returns %d", __FUNCTION__, chars); 922 return (chars); 923} 924 925 926static void whiteheat_throttle (struct usb_serial_port *port) 927{ 928 struct whiteheat_private *info = usb_get_serial_port_data(port); 929 unsigned long flags; 930 931 dbg("%s - port %d", __FUNCTION__, port->number); 932 933 spin_lock_irqsave(&info->lock, flags); 934 info->flags |= THROTTLED; 935 spin_unlock_irqrestore(&info->lock, flags); 936 937 return; 938} 939 940 941static void whiteheat_unthrottle (struct usb_serial_port *port) 942{ 943 struct whiteheat_private *info = usb_get_serial_port_data(port); 944 int actually_throttled; 945 unsigned long flags; 946 947 dbg("%s - port %d", __FUNCTION__, port->number); 948 949 spin_lock_irqsave(&info->lock, flags); 950 actually_throttled = info->flags & ACTUALLY_THROTTLED; 951 info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED); 952 spin_unlock_irqrestore(&info->lock, flags); 953 954 if (actually_throttled) 955 rx_data_softint(port); 956 957 return; 958} 959 960 961/***************************************************************************** 962 * Connect Tech's White Heat callback routines 963 *****************************************************************************/ 964static void command_port_write_callback (struct urb *urb, struct pt_regs *regs) 965{ 966 dbg("%s", __FUNCTION__); 967 968 if (urb->status) { 969 dbg ("nonzero urb status: %d", urb->status); 970 return; 971 } 972} 973 974 975static void command_port_read_callback (struct urb *urb, struct pt_regs *regs) 976{ 977 struct usb_serial_port *command_port = (struct usb_serial_port *)urb->context; 978 struct whiteheat_command_private *command_info; 979 unsigned char *data = urb->transfer_buffer; 980 int result; 981 unsigned long flags; 982 983 dbg("%s", __FUNCTION__); 984 985 if (urb->status) { 986 dbg("%s - nonzero urb status: %d", __FUNCTION__, urb->status); 987 return; 988 } 989 990 usb_serial_debug_data(debug, &command_port->dev, __FUNCTION__, urb->actual_length, data); 991 992 command_info = usb_get_serial_port_data(command_port); 993 if (!command_info) { 994 dbg ("%s - command_info is NULL, exiting.", __FUNCTION__); 995 return; 996 } 997 spin_lock_irqsave(&command_info->lock, flags); 998 999 if (data[0] == WHITEHEAT_CMD_COMPLETE) { 1000 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 1001 wake_up_interruptible(&command_info->wait_command); 1002 } else if (data[0] == WHITEHEAT_CMD_FAILURE) { 1003 command_info->command_finished = WHITEHEAT_CMD_FAILURE; 1004 wake_up_interruptible(&command_info->wait_command); 1005 } else if (data[0] == WHITEHEAT_EVENT) { 1006 /* These are unsolicited reports from the firmware, hence no waiting command to wakeup */ 1007 dbg("%s - event received", __FUNCTION__); 1008 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) { 1009 memcpy(command_info->result_buffer, &data[1], urb->actual_length - 1); 1010 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 1011 wake_up_interruptible(&command_info->wait_command); 1012 } else { 1013 dbg("%s - bad reply from firmware", __FUNCTION__); 1014 } 1015 1016 /* Continue trying to always read */ 1017 command_port->read_urb->dev = command_port->serial->dev; 1018 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC); 1019 spin_unlock_irqrestore(&command_info->lock, flags); 1020 if (result) 1021 dbg("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); 1022} 1023 1024 1025static void whiteheat_read_callback(struct urb *urb, struct pt_regs *regs) 1026{ 1027 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 1028 struct whiteheat_urb_wrap *wrap; 1029 unsigned char *data = urb->transfer_buffer; 1030 struct whiteheat_private *info = usb_get_serial_port_data(port); 1031 1032 dbg("%s - port %d", __FUNCTION__, port->number); 1033 1034 spin_lock(&info->lock); 1035 wrap = urb_to_wrap(urb, &info->rx_urbs_submitted); 1036 if (!wrap) { 1037 spin_unlock(&info->lock); 1038 err("%s - Not my urb!", __FUNCTION__); 1039 return; 1040 } 1041 list_del(&wrap->list); 1042 spin_unlock(&info->lock); 1043 1044 if (urb->status) { 1045 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status); 1046 spin_lock(&info->lock); 1047 list_add(&wrap->list, &info->rx_urbs_free); 1048 spin_unlock(&info->lock); 1049 return; 1050 } 1051 1052 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); 1053 1054 spin_lock(&info->lock); 1055 list_add_tail(&wrap->list, &info->rx_urb_q); 1056 if (info->flags & THROTTLED) { 1057 info->flags |= ACTUALLY_THROTTLED; 1058 spin_unlock(&info->lock); 1059 return; 1060 } 1061 spin_unlock(&info->lock); 1062 1063 schedule_work(&info->rx_work); 1064} 1065 1066 1067static void whiteheat_write_callback(struct urb *urb, struct pt_regs *regs) 1068{ 1069 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 1070 struct whiteheat_private *info = usb_get_serial_port_data(port); 1071 struct whiteheat_urb_wrap *wrap; 1072 1073 dbg("%s - port %d", __FUNCTION__, port->number); 1074 1075 spin_lock(&info->lock); 1076 wrap = urb_to_wrap(urb, &info->tx_urbs_submitted); 1077 if (!wrap) { 1078 spin_unlock(&info->lock); 1079 err("%s - Not my urb!", __FUNCTION__); 1080 return; 1081 } 1082 list_del(&wrap->list); 1083 list_add(&wrap->list, &info->tx_urbs_free); 1084 spin_unlock(&info->lock); 1085 1086 if (urb->status) { 1087 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); 1088 return; 1089 } 1090 1091 usb_serial_port_softint((void *)port); 1092 1093 schedule_work(&port->work); 1094} 1095 1096 1097/***************************************************************************** 1098 * Connect Tech's White Heat firmware interface 1099 *****************************************************************************/ 1100static int firm_send_command (struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize) 1101{ 1102 struct usb_serial_port *command_port; 1103 struct whiteheat_command_private *command_info; 1104 struct whiteheat_private *info; 1105 __u8 *transfer_buffer; 1106 int retval = 0; 1107 unsigned long flags; 1108 1109 dbg("%s - command %d", __FUNCTION__, command); 1110 1111 command_port = port->serial->port[COMMAND_PORT]; 1112 command_info = usb_get_serial_port_data(command_port); 1113 spin_lock_irqsave(&command_info->lock, flags); 1114 command_info->command_finished = FALSE; 1115 1116 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer; 1117 transfer_buffer[0] = command; 1118 memcpy (&transfer_buffer[1], data, datasize); 1119 command_port->write_urb->transfer_buffer_length = datasize + 1; 1120 command_port->write_urb->dev = port->serial->dev; 1121 retval = usb_submit_urb (command_port->write_urb, GFP_KERNEL); 1122 if (retval) { 1123 dbg("%s - submit urb failed", __FUNCTION__); 1124 goto exit; 1125 } 1126 spin_unlock_irqrestore(&command_info->lock, flags); 1127 1128 /* wait for the command to complete */ 1129 wait_event_interruptible_timeout(command_info->wait_command, 1130 (command_info->command_finished != FALSE), COMMAND_TIMEOUT); 1131 1132 spin_lock_irqsave(&command_info->lock, flags); 1133 1134 if (command_info->command_finished == FALSE) { 1135 dbg("%s - command timed out.", __FUNCTION__); 1136 retval = -ETIMEDOUT; 1137 goto exit; 1138 } 1139 1140 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) { 1141 dbg("%s - command failed.", __FUNCTION__); 1142 retval = -EIO; 1143 goto exit; 1144 } 1145 1146 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) { 1147 dbg("%s - command completed.", __FUNCTION__); 1148 switch (command) { 1149 case WHITEHEAT_GET_DTR_RTS: 1150 info = usb_get_serial_port_data(port); 1151 memcpy(&info->mcr, command_info->result_buffer, sizeof(struct whiteheat_dr_info)); 1152 break; 1153 } 1154 } 1155 1156exit: 1157 spin_unlock_irqrestore(&command_info->lock, flags); 1158 return retval; 1159} 1160 1161 1162static int firm_open(struct usb_serial_port *port) { 1163 struct whiteheat_simple open_command; 1164 1165 open_command.port = port->number - port->serial->minor + 1; 1166 return firm_send_command(port, WHITEHEAT_OPEN, (__u8 *)&open_command, sizeof(open_command)); 1167} 1168 1169 1170static int firm_close(struct usb_serial_port *port) { 1171 struct whiteheat_simple close_command; 1172 1173 close_command.port = port->number - port->serial->minor + 1; 1174 return firm_send_command(port, WHITEHEAT_CLOSE, (__u8 *)&close_command, sizeof(close_command)); 1175} 1176 1177 1178static int firm_setup_port(struct usb_serial_port *port) { 1179 struct whiteheat_port_settings port_settings; 1180 unsigned int cflag = port->tty->termios->c_cflag; 1181 1182 port_settings.port = port->number + 1; 1183 1184 /* get the byte size */ 1185 switch (cflag & CSIZE) { 1186 case CS5: port_settings.bits = 5; break; 1187 case CS6: port_settings.bits = 6; break; 1188 case CS7: port_settings.bits = 7; break; 1189 default: 1190 case CS8: port_settings.bits = 8; break; 1191 } 1192 dbg("%s - data bits = %d", __FUNCTION__, port_settings.bits); 1193 1194 /* determine the parity */ 1195 if (cflag & PARENB) 1196 if (cflag & CMSPAR) 1197 if (cflag & PARODD) 1198 port_settings.parity = WHITEHEAT_PAR_MARK; 1199 else 1200 port_settings.parity = WHITEHEAT_PAR_SPACE; 1201 else 1202 if (cflag & PARODD) 1203 port_settings.parity = WHITEHEAT_PAR_ODD; 1204 else 1205 port_settings.parity = WHITEHEAT_PAR_EVEN; 1206 else 1207 port_settings.parity = WHITEHEAT_PAR_NONE; 1208 dbg("%s - parity = %c", __FUNCTION__, port_settings.parity); 1209 1210 /* figure out the stop bits requested */ 1211 if (cflag & CSTOPB) 1212 port_settings.stop = 2; 1213 else 1214 port_settings.stop = 1; 1215 dbg("%s - stop bits = %d", __FUNCTION__, port_settings.stop); 1216 1217 /* figure out the flow control settings */ 1218 if (cflag & CRTSCTS) 1219 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | WHITEHEAT_HFLOW_RTS); 1220 else 1221 port_settings.hflow = WHITEHEAT_HFLOW_NONE; 1222 dbg("%s - hardware flow control = %s %s %s %s", __FUNCTION__, 1223 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "", 1224 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "", 1225 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "", 1226 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : ""); 1227 1228 /* determine software flow control */ 1229 if (I_IXOFF(port->tty)) 1230 port_settings.sflow = WHITEHEAT_SFLOW_RXTX; 1231 else 1232 port_settings.sflow = WHITEHEAT_SFLOW_NONE; 1233 dbg("%s - software flow control = %c", __FUNCTION__, port_settings.sflow); 1234 1235 port_settings.xon = START_CHAR(port->tty); 1236 port_settings.xoff = STOP_CHAR(port->tty); 1237 dbg("%s - XON = %2x, XOFF = %2x", __FUNCTION__, port_settings.xon, port_settings.xoff); 1238 1239 /* get the baud rate wanted */ 1240 port_settings.baud = tty_get_baud_rate(port->tty); 1241 dbg("%s - baud rate = %d", __FUNCTION__, port_settings.baud); 1242 1243 /* handle any settings that aren't specified in the tty structure */ 1244 port_settings.lloop = 0; 1245 1246 /* now send the message to the device */ 1247 return firm_send_command(port, WHITEHEAT_SETUP_PORT, (__u8 *)&port_settings, sizeof(port_settings)); 1248} 1249 1250 1251static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) { 1252 struct whiteheat_set_rdb rts_command; 1253 1254 rts_command.port = port->number - port->serial->minor + 1; 1255 rts_command.state = onoff; 1256 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&rts_command, sizeof(rts_command)); 1257} 1258 1259 1260static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) { 1261 struct whiteheat_set_rdb dtr_command; 1262 1263 dtr_command.port = port->number - port->serial->minor + 1; 1264 dtr_command.state = onoff; 1265 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&dtr_command, sizeof(dtr_command)); 1266} 1267 1268 1269static int firm_set_break(struct usb_serial_port *port, __u8 onoff) { 1270 struct whiteheat_set_rdb break_command; 1271 1272 break_command.port = port->number - port->serial->minor + 1; 1273 break_command.state = onoff; 1274 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&break_command, sizeof(break_command)); 1275} 1276 1277 1278static int firm_purge(struct usb_serial_port *port, __u8 rxtx) { 1279 struct whiteheat_purge purge_command; 1280 1281 purge_command.port = port->number - port->serial->minor + 1; 1282 purge_command.what = rxtx; 1283 return firm_send_command(port, WHITEHEAT_PURGE, (__u8 *)&purge_command, sizeof(purge_command)); 1284} 1285 1286 1287static int firm_get_dtr_rts(struct usb_serial_port *port) { 1288 struct whiteheat_simple get_dr_command; 1289 1290 get_dr_command.port = port->number - port->serial->minor + 1; 1291 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, (__u8 *)&get_dr_command, sizeof(get_dr_command)); 1292} 1293 1294 1295static int firm_report_tx_done(struct usb_serial_port *port) { 1296 struct whiteheat_simple close_command; 1297 1298 close_command.port = port->number - port->serial->minor + 1; 1299 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, (__u8 *)&close_command, sizeof(close_command)); 1300} 1301 1302 1303/***************************************************************************** 1304 * Connect Tech's White Heat utility functions 1305 *****************************************************************************/ 1306static int start_command_port(struct usb_serial *serial) 1307{ 1308 struct usb_serial_port *command_port; 1309 struct whiteheat_command_private *command_info; 1310 unsigned long flags; 1311 int retval = 0; 1312 1313 command_port = serial->port[COMMAND_PORT]; 1314 command_info = usb_get_serial_port_data(command_port); 1315 spin_lock_irqsave(&command_info->lock, flags); 1316 if (!command_info->port_running) { 1317 /* Work around HCD bugs */ 1318 usb_clear_halt(serial->dev, command_port->read_urb->pipe); 1319 1320 command_port->read_urb->dev = serial->dev; 1321 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL); 1322 if (retval) { 1323 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval); 1324 goto exit; 1325 } 1326 } 1327 command_info->port_running++; 1328 1329exit: 1330 spin_unlock_irqrestore(&command_info->lock, flags); 1331 return retval; 1332} 1333 1334 1335static void stop_command_port(struct usb_serial *serial) 1336{ 1337 struct usb_serial_port *command_port; 1338 struct whiteheat_command_private *command_info; 1339 unsigned long flags; 1340 1341 command_port = serial->port[COMMAND_PORT]; 1342 command_info = usb_get_serial_port_data(command_port); 1343 spin_lock_irqsave(&command_info->lock, flags); 1344 command_info->port_running--; 1345 if (!command_info->port_running) 1346 usb_kill_urb(command_port->read_urb); 1347 spin_unlock_irqrestore(&command_info->lock, flags); 1348} 1349 1350 1351static int start_port_read(struct usb_serial_port *port) 1352{ 1353 struct whiteheat_private *info = usb_get_serial_port_data(port); 1354 struct whiteheat_urb_wrap *wrap; 1355 struct urb *urb; 1356 int retval = 0; 1357 unsigned long flags; 1358 struct list_head *tmp; 1359 struct list_head *tmp2; 1360 1361 spin_lock_irqsave(&info->lock, flags); 1362 1363 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 1364 list_del(tmp); 1365 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1366 urb = wrap->urb; 1367 urb->dev = port->serial->dev; 1368 retval = usb_submit_urb(urb, GFP_KERNEL); 1369 if (retval) { 1370 list_add(tmp, &info->rx_urbs_free); 1371 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 1372 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1373 urb = wrap->urb; 1374 usb_kill_urb(urb); 1375 list_del(tmp); 1376 list_add(tmp, &info->rx_urbs_free); 1377 } 1378 break; 1379 } 1380 list_add(tmp, &info->rx_urbs_submitted); 1381 } 1382 1383 spin_unlock_irqrestore(&info->lock, flags); 1384 1385 return retval; 1386} 1387 1388 1389static struct whiteheat_urb_wrap *urb_to_wrap(struct urb* urb, struct list_head *head) 1390{ 1391 struct whiteheat_urb_wrap *wrap; 1392 struct list_head *tmp; 1393 1394 list_for_each(tmp, head) { 1395 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1396 if (wrap->urb == urb) 1397 return wrap; 1398 } 1399 1400 return NULL; 1401} 1402 1403 1404static struct list_head *list_first(struct list_head *head) 1405{ 1406 return head->next; 1407} 1408 1409 1410static void rx_data_softint(void *private) 1411{ 1412 struct usb_serial_port *port = (struct usb_serial_port *)private; 1413 struct whiteheat_private *info = usb_get_serial_port_data(port); 1414 struct tty_struct *tty = port->tty; 1415 struct whiteheat_urb_wrap *wrap; 1416 struct urb *urb; 1417 unsigned long flags; 1418 struct list_head *tmp; 1419 struct list_head *tmp2; 1420 int result; 1421 int sent = 0; 1422 1423 spin_lock_irqsave(&info->lock, flags); 1424 if (info->flags & THROTTLED) { 1425 spin_unlock_irqrestore(&info->lock, flags); 1426 return; 1427 } 1428 1429 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) { 1430 list_del(tmp); 1431 spin_unlock_irqrestore(&info->lock, flags); 1432 1433 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1434 urb = wrap->urb; 1435 1436 if (tty && urb->actual_length) { 1437 int len = tty_buffer_request_room(tty, urb->actual_length); 1438 /* This stuff can go away now I suspect */ 1439 if (unlikely(len < urb->actual_length)) { 1440 spin_lock_irqsave(&info->lock, flags); 1441 list_add(tmp, &info->rx_urb_q); 1442 spin_unlock_irqrestore(&info->lock, flags); 1443 tty_flip_buffer_push(tty); 1444 schedule_work(&info->rx_work); 1445 return; 1446 } 1447 tty_insert_flip_string(tty, urb->transfer_buffer, len); 1448 sent += len; 1449 } 1450 1451 urb->dev = port->serial->dev; 1452 result = usb_submit_urb(urb, GFP_ATOMIC); 1453 if (result) { 1454 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); 1455 spin_lock_irqsave(&info->lock, flags); 1456 list_add(tmp, &info->rx_urbs_free); 1457 continue; 1458 } 1459 1460 spin_lock_irqsave(&info->lock, flags); 1461 list_add(tmp, &info->rx_urbs_submitted); 1462 } 1463 spin_unlock_irqrestore(&info->lock, flags); 1464 1465 if (sent) 1466 tty_flip_buffer_push(tty); 1467} 1468 1469 1470/***************************************************************************** 1471 * Connect Tech's White Heat module functions 1472 *****************************************************************************/ 1473static int __init whiteheat_init (void) 1474{ 1475 int retval; 1476 retval = usb_serial_register(&whiteheat_fake_device); 1477 if (retval) 1478 goto failed_fake_register; 1479 retval = usb_serial_register(&whiteheat_device); 1480 if (retval) 1481 goto failed_device_register; 1482 retval = usb_register(&whiteheat_driver); 1483 if (retval) 1484 goto failed_usb_register; 1485 info(DRIVER_DESC " " DRIVER_VERSION); 1486 return 0; 1487failed_usb_register: 1488 usb_serial_deregister(&whiteheat_device); 1489failed_device_register: 1490 usb_serial_deregister(&whiteheat_fake_device); 1491failed_fake_register: 1492 return retval; 1493} 1494 1495 1496static void __exit whiteheat_exit (void) 1497{ 1498 usb_deregister (&whiteheat_driver); 1499 usb_serial_deregister (&whiteheat_fake_device); 1500 usb_serial_deregister (&whiteheat_device); 1501} 1502 1503 1504module_init(whiteheat_init); 1505module_exit(whiteheat_exit); 1506 1507MODULE_AUTHOR( DRIVER_AUTHOR ); 1508MODULE_DESCRIPTION( DRIVER_DESC ); 1509MODULE_LICENSE("GPL"); 1510 1511module_param(urb_pool_size, int, 0); 1512MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering"); 1513 1514module_param(debug, bool, S_IRUGO | S_IWUSR); 1515MODULE_PARM_DESC(debug, "Debug enabled or not"); 1516