1/* 2 * USB ConnectTech WhiteHEAT driver 3 * 4 * Copyright (C) 2002 5 * Connect Tech Inc. 6 * 7 * Copyright (C) 1999 - 2001 8 * Greg Kroah-Hartman (greg@kroah.com) 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * See Documentation/usb/usb-serial.txt for more information on using this driver 16 * 17 * (10/09/2002) Stuart MacDonald (stuartm@connecttech.com) 18 * Upgrade to full working driver 19 * 20 * (05/30/2001) gkh 21 * switched from using spinlock to a semaphore, which fixes lots of problems. 22 * 23 * (04/08/2001) gb 24 * Identify version on module load. 25 * 26 * 2001_Mar_19 gkh 27 * Fixed MOD_INC and MOD_DEC logic, the ability to open a port more 28 * than once, and the got the proper usb_device_id table entries so 29 * the driver works again. 30 * 31 * (11/01/2000) Adam J. Richter 32 * usb_device_id table support 33 * 34 * (10/05/2000) gkh 35 * Fixed bug with urb->dev not being set properly, now that the usb 36 * core needs it. 37 * 38 * (10/03/2000) smd 39 * firmware is improved to guard against crap sent to device 40 * firmware now replies CMD_FAILURE on bad things 41 * read_callback fix you provided for private info struct 42 * command_finished now indicates success or fail 43 * setup_port struct now packed to avoid gcc padding 44 * firmware uses 1 based port numbering, driver now handles that 45 * 46 * (09/11/2000) gkh 47 * Removed DEBUG #ifdefs with call to usb_serial_debug_data 48 * 49 * (07/19/2000) gkh 50 * Added module_init and module_exit functions to handle the fact that this 51 * driver is a loadable module now. 52 * Fixed bug with port->minor that was found by Al Borchers 53 * 54 * (07/04/2000) gkh 55 * Added support for port settings. Baud rate can now be changed. Line signals 56 * are not transferred to and from the tty layer yet, but things seem to be 57 * working well now. 58 * 59 * (05/04/2000) gkh 60 * First cut at open and close commands. Data can flow through the ports at 61 * default speeds now. 62 * 63 * (03/26/2000) gkh 64 * Split driver up into device specific pieces. 65 * 66 */ 67 68#include <linux/kernel.h> 69#include <linux/errno.h> 70#include <linux/init.h> 71#include <linux/slab.h> 72#include <linux/tty.h> 73#include <linux/tty_driver.h> 74#include <linux/tty_flip.h> 75#include <linux/module.h> 76#include <linux/spinlock.h> 77#include <asm/uaccess.h> 78#include <asm/termbits.h> 79#include <linux/usb.h> 80#include <linux/serial_reg.h> 81#include <linux/serial.h> 82#include <linux/usb/serial.h> 83#include "whiteheat_fw.h" /* firmware for the ConnectTech WhiteHEAT device */ 84#include "whiteheat.h" /* WhiteHEAT specific commands */ 85 86static int debug; 87 88#ifndef CMSPAR 89#define CMSPAR 0 90#endif 91 92/* 93 * Version Information 94 */ 95#define DRIVER_VERSION "v2.0" 96#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>" 97#define DRIVER_DESC "USB ConnectTech WhiteHEAT driver" 98 99#define CONNECT_TECH_VENDOR_ID 0x0710 100#define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001 101#define CONNECT_TECH_WHITE_HEAT_ID 0x8001 102 103/* 104 ID tables for whiteheat are unusual, because we want to different 105 things for different versions of the device. Eventually, this 106 will be doable from a single table. But, for now, we define two 107 separate ID tables, and then a third table that combines them 108 just for the purpose of exporting the autoloading information. 109*/ 110static struct usb_device_id id_table_std [] = { 111 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) }, 112 { } /* Terminating entry */ 113}; 114 115static struct usb_device_id id_table_prerenumeration [] = { 116 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) }, 117 { } /* Terminating entry */ 118}; 119 120static struct usb_device_id id_table_combined [] = { 121 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) }, 122 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) }, 123 { } /* Terminating entry */ 124}; 125 126MODULE_DEVICE_TABLE (usb, id_table_combined); 127 128static struct usb_driver whiteheat_driver = { 129 .name = "whiteheat", 130 .probe = usb_serial_probe, 131 .disconnect = usb_serial_disconnect, 132 .id_table = id_table_combined, 133 .no_dynamic_id = 1, 134}; 135 136/* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */ 137static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id); 138static int whiteheat_firmware_attach (struct usb_serial *serial); 139 140/* function prototypes for the Connect Tech WhiteHEAT serial converter */ 141static int whiteheat_attach (struct usb_serial *serial); 142static void whiteheat_shutdown (struct usb_serial *serial); 143static int whiteheat_open (struct usb_serial_port *port, struct file *filp); 144static void whiteheat_close (struct usb_serial_port *port, struct file *filp); 145static int whiteheat_write (struct usb_serial_port *port, const unsigned char *buf, int count); 146static int whiteheat_write_room (struct usb_serial_port *port); 147static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg); 148static void whiteheat_set_termios (struct usb_serial_port *port, struct ktermios * old); 149static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file); 150static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear); 151static void whiteheat_break_ctl (struct usb_serial_port *port, int break_state); 152static int whiteheat_chars_in_buffer (struct usb_serial_port *port); 153static void whiteheat_throttle (struct usb_serial_port *port); 154static void whiteheat_unthrottle (struct usb_serial_port *port); 155static void whiteheat_read_callback (struct urb *urb); 156static void whiteheat_write_callback (struct urb *urb); 157 158static struct usb_serial_driver whiteheat_fake_device = { 159 .driver = { 160 .owner = THIS_MODULE, 161 .name = "whiteheatnofirm", 162 }, 163 .description = "Connect Tech - WhiteHEAT - (prerenumeration)", 164 .usb_driver = &whiteheat_driver, 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 .usb_driver = &whiteheat_driver, 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 usb_serial_port *port; 233 struct list_head tx_urbs_free; 234 struct list_head tx_urbs_submitted; 235}; 236 237 238/* local function prototypes */ 239static int start_command_port(struct usb_serial *serial); 240static void stop_command_port(struct usb_serial *serial); 241static void command_port_write_callback(struct urb *urb); 242static void command_port_read_callback(struct urb *urb); 243 244static int start_port_read(struct usb_serial_port *port); 245static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, struct list_head *head); 246static struct list_head *list_first(struct list_head *head); 247static void rx_data_softint(struct work_struct *work); 248 249static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize); 250static int firm_open(struct usb_serial_port *port); 251static int firm_close(struct usb_serial_port *port); 252static int firm_setup_port(struct usb_serial_port *port); 253static int firm_set_rts(struct usb_serial_port *port, __u8 onoff); 254static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff); 255static int firm_set_break(struct usb_serial_port *port, __u8 onoff); 256static int firm_purge(struct usb_serial_port *port, __u8 rxtx); 257static int firm_get_dtr_rts(struct usb_serial_port *port); 258static int firm_report_tx_done(struct usb_serial_port *port); 259 260 261#define COMMAND_PORT 4 262#define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */ 263#define COMMAND_TIMEOUT_MS 2000 264#define CLOSING_DELAY (30 * HZ) 265 266 267/***************************************************************************** 268 * Connect Tech's White Heat prerenumeration driver functions 269 *****************************************************************************/ 270 271/* steps to download the firmware to the WhiteHEAT device: 272 - hold the reset (by writing to the reset bit of the CPUCS register) 273 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD 274 - release the reset (by writing to the CPUCS register) 275 - download the WH.HEX file for all addresses greater than 0x1b3f using 276 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD 277 - hold the reset 278 - download the WH.HEX file for all addresses less than 0x1b40 using 279 VENDOR_REQUEST_ANCHOR_LOAD 280 - release the reset 281 - device renumerated itself and comes up as new device id with all 282 firmware download completed. 283*/ 284static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id) 285{ 286 int response; 287 const struct whiteheat_hex_record *record; 288 289 dbg("%s", __FUNCTION__); 290 291 response = ezusb_set_reset (serial, 1); 292 293 record = &whiteheat_loader[0]; 294 while (record->address != 0xffff) { 295 response = ezusb_writememory (serial, record->address, 296 (unsigned char *)record->data, record->data_size, 0xa0); 297 if (response < 0) { 298 err("%s - ezusb_writememory failed for loader (%d %04X %p %d)", 299 __FUNCTION__, response, record->address, record->data, record->data_size); 300 break; 301 } 302 ++record; 303 } 304 305 response = ezusb_set_reset (serial, 0); 306 307 record = &whiteheat_firmware[0]; 308 while (record->address < 0x1b40) { 309 ++record; 310 } 311 while (record->address != 0xffff) { 312 response = ezusb_writememory (serial, record->address, 313 (unsigned char *)record->data, record->data_size, 0xa3); 314 if (response < 0) { 315 err("%s - ezusb_writememory failed for first firmware step (%d %04X %p %d)", 316 __FUNCTION__, response, record->address, record->data, record->data_size); 317 break; 318 } 319 ++record; 320 } 321 322 response = ezusb_set_reset (serial, 1); 323 324 record = &whiteheat_firmware[0]; 325 while (record->address < 0x1b40) { 326 response = ezusb_writememory (serial, record->address, 327 (unsigned char *)record->data, record->data_size, 0xa0); 328 if (response < 0) { 329 err("%s - ezusb_writememory failed for second firmware step (%d %04X %p %d)", 330 __FUNCTION__, response, record->address, record->data, record->data_size); 331 break; 332 } 333 ++record; 334 } 335 336 response = ezusb_set_reset (serial, 0); 337 338 return 0; 339} 340 341 342static int whiteheat_firmware_attach (struct usb_serial *serial) 343{ 344 /* We want this device to fail to have a driver assigned to it */ 345 return 1; 346} 347 348 349/***************************************************************************** 350 * Connect Tech's White Heat serial driver functions 351 *****************************************************************************/ 352static int whiteheat_attach (struct usb_serial *serial) 353{ 354 struct usb_serial_port *command_port; 355 struct whiteheat_command_private *command_info; 356 struct usb_serial_port *port; 357 struct whiteheat_private *info; 358 struct whiteheat_hw_info *hw_info; 359 int pipe; 360 int ret; 361 int alen; 362 __u8 *command; 363 __u8 *result; 364 int i; 365 int j; 366 struct urb *urb; 367 int buf_size; 368 struct whiteheat_urb_wrap *wrap; 369 struct list_head *tmp; 370 371 command_port = serial->port[COMMAND_PORT]; 372 373 pipe = usb_sndbulkpipe (serial->dev, command_port->bulk_out_endpointAddress); 374 command = kmalloc(2, GFP_KERNEL); 375 if (!command) 376 goto no_command_buffer; 377 command[0] = WHITEHEAT_GET_HW_INFO; 378 command[1] = 0; 379 380 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL); 381 if (!result) 382 goto no_result_buffer; 383 /* 384 * When the module is reloaded the firmware is still there and 385 * the endpoints are still in the usb core unchanged. This is the 386 * unlinking bug in disguise. Same for the call below. 387 */ 388 usb_clear_halt(serial->dev, pipe); 389 ret = usb_bulk_msg (serial->dev, pipe, command, 2, &alen, COMMAND_TIMEOUT_MS); 390 if (ret) { 391 err("%s: Couldn't send command [%d]", serial->type->description, ret); 392 goto no_firmware; 393 } else if (alen != 2) { 394 err("%s: Send command incomplete [%d]", serial->type->description, alen); 395 goto no_firmware; 396 } 397 398 pipe = usb_rcvbulkpipe (serial->dev, command_port->bulk_in_endpointAddress); 399 /* See the comment on the usb_clear_halt() above */ 400 usb_clear_halt(serial->dev, pipe); 401 ret = usb_bulk_msg (serial->dev, pipe, result, sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS); 402 if (ret) { 403 err("%s: Couldn't get results [%d]", serial->type->description, ret); 404 goto no_firmware; 405 } else if (alen != sizeof(*hw_info) + 1) { 406 err("%s: Get results incomplete [%d]", serial->type->description, alen); 407 goto no_firmware; 408 } else if (result[0] != command[0]) { 409 err("%s: Command failed [%d]", serial->type->description, result[0]); 410 goto no_firmware; 411 } 412 413 hw_info = (struct whiteheat_hw_info *)&result[1]; 414 415 info("%s: Driver %s: Firmware v%d.%02d", serial->type->description, 416 DRIVER_VERSION, hw_info->sw_major_rev, hw_info->sw_minor_rev); 417 418 for (i = 0; i < serial->num_ports; i++) { 419 port = serial->port[i]; 420 421 info = kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL); 422 if (info == NULL) { 423 err("%s: Out of memory for port structures\n", serial->type->description); 424 goto no_private; 425 } 426 427 spin_lock_init(&info->lock); 428 info->flags = 0; 429 info->mcr = 0; 430 INIT_WORK(&info->rx_work, rx_data_softint); 431 info->port = port; 432 433 INIT_LIST_HEAD(&info->rx_urbs_free); 434 INIT_LIST_HEAD(&info->rx_urbs_submitted); 435 INIT_LIST_HEAD(&info->rx_urb_q); 436 INIT_LIST_HEAD(&info->tx_urbs_free); 437 INIT_LIST_HEAD(&info->tx_urbs_submitted); 438 439 for (j = 0; j < urb_pool_size; j++) { 440 urb = usb_alloc_urb(0, GFP_KERNEL); 441 if (!urb) { 442 err("No free urbs available"); 443 goto no_rx_urb; 444 } 445 buf_size = port->read_urb->transfer_buffer_length; 446 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 447 if (!urb->transfer_buffer) { 448 err("Couldn't allocate urb buffer"); 449 goto no_rx_buf; 450 } 451 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 452 if (!wrap) { 453 err("Couldn't allocate urb wrapper"); 454 goto no_rx_wrap; 455 } 456 usb_fill_bulk_urb(urb, serial->dev, 457 usb_rcvbulkpipe(serial->dev, 458 port->bulk_in_endpointAddress), 459 urb->transfer_buffer, buf_size, 460 whiteheat_read_callback, port); 461 wrap->urb = urb; 462 list_add(&wrap->list, &info->rx_urbs_free); 463 464 urb = usb_alloc_urb(0, GFP_KERNEL); 465 if (!urb) { 466 err("No free urbs available"); 467 goto no_tx_urb; 468 } 469 buf_size = port->write_urb->transfer_buffer_length; 470 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 471 if (!urb->transfer_buffer) { 472 err("Couldn't allocate urb buffer"); 473 goto no_tx_buf; 474 } 475 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 476 if (!wrap) { 477 err("Couldn't allocate urb wrapper"); 478 goto no_tx_wrap; 479 } 480 usb_fill_bulk_urb(urb, serial->dev, 481 usb_sndbulkpipe(serial->dev, 482 port->bulk_out_endpointAddress), 483 urb->transfer_buffer, buf_size, 484 whiteheat_write_callback, port); 485 wrap->urb = urb; 486 list_add(&wrap->list, &info->tx_urbs_free); 487 } 488 489 usb_set_serial_port_data(port, info); 490 } 491 492 command_info = kmalloc(sizeof(struct whiteheat_command_private), GFP_KERNEL); 493 if (command_info == NULL) { 494 err("%s: Out of memory for port structures\n", serial->type->description); 495 goto no_command_private; 496 } 497 498 spin_lock_init(&command_info->lock); 499 command_info->port_running = 0; 500 init_waitqueue_head(&command_info->wait_command); 501 usb_set_serial_port_data(command_port, command_info); 502 command_port->write_urb->complete = command_port_write_callback; 503 command_port->read_urb->complete = command_port_read_callback; 504 kfree(result); 505 kfree(command); 506 507 return 0; 508 509no_firmware: 510 /* Firmware likely not running */ 511 err("%s: Unable to retrieve firmware version, try replugging\n", serial->type->description); 512 err("%s: If the firmware is not running (status led not blinking)\n", serial->type->description); 513 err("%s: please contact support@connecttech.com\n", serial->type->description); 514 kfree(result); 515 return -ENODEV; 516 517no_command_private: 518 for (i = serial->num_ports - 1; i >= 0; i--) { 519 port = serial->port[i]; 520 info = usb_get_serial_port_data(port); 521 for (j = urb_pool_size - 1; j >= 0; j--) { 522 tmp = list_first(&info->tx_urbs_free); 523 list_del(tmp); 524 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 525 urb = wrap->urb; 526 kfree(wrap); 527no_tx_wrap: 528 kfree(urb->transfer_buffer); 529no_tx_buf: 530 usb_free_urb(urb); 531no_tx_urb: 532 tmp = list_first(&info->rx_urbs_free); 533 list_del(tmp); 534 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 535 urb = wrap->urb; 536 kfree(wrap); 537no_rx_wrap: 538 kfree(urb->transfer_buffer); 539no_rx_buf: 540 usb_free_urb(urb); 541no_rx_urb: 542 ; 543 } 544 kfree(info); 545no_private: 546 ; 547 } 548 kfree(result); 549no_result_buffer: 550 kfree(command); 551no_command_buffer: 552 return -ENOMEM; 553} 554 555 556static void whiteheat_shutdown (struct usb_serial *serial) 557{ 558 struct usb_serial_port *command_port; 559 struct usb_serial_port *port; 560 struct whiteheat_private *info; 561 struct whiteheat_urb_wrap *wrap; 562 struct urb *urb; 563 struct list_head *tmp; 564 struct list_head *tmp2; 565 int i; 566 567 dbg("%s", __FUNCTION__); 568 569 /* free up our private data for our command port */ 570 command_port = serial->port[COMMAND_PORT]; 571 kfree (usb_get_serial_port_data(command_port)); 572 573 for (i = 0; i < serial->num_ports; i++) { 574 port = serial->port[i]; 575 info = usb_get_serial_port_data(port); 576 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 577 list_del(tmp); 578 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 579 urb = wrap->urb; 580 kfree(wrap); 581 kfree(urb->transfer_buffer); 582 usb_free_urb(urb); 583 } 584 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) { 585 list_del(tmp); 586 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 587 urb = wrap->urb; 588 kfree(wrap); 589 kfree(urb->transfer_buffer); 590 usb_free_urb(urb); 591 } 592 kfree(info); 593 } 594 595 return; 596} 597 598 599static int whiteheat_open (struct usb_serial_port *port, struct file *filp) 600{ 601 int retval = 0; 602 struct ktermios old_term; 603 604 dbg("%s - port %d", __FUNCTION__, port->number); 605 606 retval = start_command_port(port->serial); 607 if (retval) 608 goto exit; 609 610 if (port->tty) 611 port->tty->low_latency = 1; 612 613 /* send an open port command */ 614 retval = firm_open(port); 615 if (retval) { 616 stop_command_port(port->serial); 617 goto exit; 618 } 619 620 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX); 621 if (retval) { 622 firm_close(port); 623 stop_command_port(port->serial); 624 goto exit; 625 } 626 627 old_term.c_cflag = ~port->tty->termios->c_cflag; 628 old_term.c_iflag = ~port->tty->termios->c_iflag; 629 whiteheat_set_termios(port, &old_term); 630 631 usb_clear_halt(port->serial->dev, port->read_urb->pipe); 632 usb_clear_halt(port->serial->dev, port->write_urb->pipe); 633 634 /* Start reading from the device */ 635 retval = start_port_read(port); 636 if (retval) { 637 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval); 638 firm_close(port); 639 stop_command_port(port->serial); 640 goto exit; 641 } 642 643exit: 644 dbg("%s - exit, retval = %d", __FUNCTION__, retval); 645 return retval; 646} 647 648 649static void whiteheat_close(struct usb_serial_port *port, struct file * filp) 650{ 651 struct whiteheat_private *info = usb_get_serial_port_data(port); 652 struct whiteheat_urb_wrap *wrap; 653 struct urb *urb; 654 struct list_head *tmp; 655 struct list_head *tmp2; 656 unsigned long flags; 657 658 dbg("%s - port %d", __FUNCTION__, port->number); 659 660 /* filp is NULL when called from usb_serial_disconnect */ 661 if (filp && (tty_hung_up_p(filp))) { 662 return; 663 } 664 665 port->tty->closing = 1; 666 667/* 668 * Not currently in use; tty_wait_until_sent() calls 669 * serial_chars_in_buffer() which deadlocks on the second semaphore 670 * acquisition. This should be fixed at some point. Greg's been 671 * notified. 672 if ((filp->f_flags & (O_NDELAY | O_NONBLOCK)) == 0) { 673 tty_wait_until_sent(port->tty, CLOSING_DELAY); 674 } 675*/ 676 677 if (port->tty->driver->flush_buffer) 678 port->tty->driver->flush_buffer(port->tty); 679 tty_ldisc_flush(port->tty); 680 681 firm_report_tx_done(port); 682 683 firm_close(port); 684 685 /* shutdown our bulk reads and writes */ 686 spin_lock_irqsave(&info->lock, flags); 687 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 688 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 689 urb = wrap->urb; 690 usb_kill_urb(urb); 691 list_move(tmp, &info->rx_urbs_free); 692 } 693 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) 694 list_move(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_move(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 ktermios *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(&info->rx_work); 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) 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) 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) 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) 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_move(&wrap->list, &info->tx_urbs_free); 1083 spin_unlock(&info->lock); 1084 1085 if (urb->status) { 1086 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); 1087 return; 1088 } 1089 1090 usb_serial_port_softint(port); 1091} 1092 1093 1094/***************************************************************************** 1095 * Connect Tech's White Heat firmware interface 1096 *****************************************************************************/ 1097static int firm_send_command (struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize) 1098{ 1099 struct usb_serial_port *command_port; 1100 struct whiteheat_command_private *command_info; 1101 struct whiteheat_private *info; 1102 __u8 *transfer_buffer; 1103 int retval = 0; 1104 unsigned long flags; 1105 1106 dbg("%s - command %d", __FUNCTION__, command); 1107 1108 command_port = port->serial->port[COMMAND_PORT]; 1109 command_info = usb_get_serial_port_data(command_port); 1110 spin_lock_irqsave(&command_info->lock, flags); 1111 command_info->command_finished = false; 1112 1113 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer; 1114 transfer_buffer[0] = command; 1115 memcpy (&transfer_buffer[1], data, datasize); 1116 command_port->write_urb->transfer_buffer_length = datasize + 1; 1117 command_port->write_urb->dev = port->serial->dev; 1118 retval = usb_submit_urb (command_port->write_urb, GFP_KERNEL); 1119 if (retval) { 1120 dbg("%s - submit urb failed", __FUNCTION__); 1121 goto exit; 1122 } 1123 spin_unlock_irqrestore(&command_info->lock, flags); 1124 1125 /* wait for the command to complete */ 1126 wait_event_interruptible_timeout(command_info->wait_command, 1127 (bool)command_info->command_finished, COMMAND_TIMEOUT); 1128 1129 spin_lock_irqsave(&command_info->lock, flags); 1130 1131 if (command_info->command_finished == false) { 1132 dbg("%s - command timed out.", __FUNCTION__); 1133 retval = -ETIMEDOUT; 1134 goto exit; 1135 } 1136 1137 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) { 1138 dbg("%s - command failed.", __FUNCTION__); 1139 retval = -EIO; 1140 goto exit; 1141 } 1142 1143 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) { 1144 dbg("%s - command completed.", __FUNCTION__); 1145 switch (command) { 1146 case WHITEHEAT_GET_DTR_RTS: 1147 info = usb_get_serial_port_data(port); 1148 memcpy(&info->mcr, command_info->result_buffer, sizeof(struct whiteheat_dr_info)); 1149 break; 1150 } 1151 } 1152 1153exit: 1154 spin_unlock_irqrestore(&command_info->lock, flags); 1155 return retval; 1156} 1157 1158 1159static int firm_open(struct usb_serial_port *port) { 1160 struct whiteheat_simple open_command; 1161 1162 open_command.port = port->number - port->serial->minor + 1; 1163 return firm_send_command(port, WHITEHEAT_OPEN, (__u8 *)&open_command, sizeof(open_command)); 1164} 1165 1166 1167static int firm_close(struct usb_serial_port *port) { 1168 struct whiteheat_simple close_command; 1169 1170 close_command.port = port->number - port->serial->minor + 1; 1171 return firm_send_command(port, WHITEHEAT_CLOSE, (__u8 *)&close_command, sizeof(close_command)); 1172} 1173 1174 1175static int firm_setup_port(struct usb_serial_port *port) { 1176 struct whiteheat_port_settings port_settings; 1177 unsigned int cflag = port->tty->termios->c_cflag; 1178 1179 port_settings.port = port->number + 1; 1180 1181 /* get the byte size */ 1182 switch (cflag & CSIZE) { 1183 case CS5: port_settings.bits = 5; break; 1184 case CS6: port_settings.bits = 6; break; 1185 case CS7: port_settings.bits = 7; break; 1186 default: 1187 case CS8: port_settings.bits = 8; break; 1188 } 1189 dbg("%s - data bits = %d", __FUNCTION__, port_settings.bits); 1190 1191 /* determine the parity */ 1192 if (cflag & PARENB) 1193 if (cflag & CMSPAR) 1194 if (cflag & PARODD) 1195 port_settings.parity = WHITEHEAT_PAR_MARK; 1196 else 1197 port_settings.parity = WHITEHEAT_PAR_SPACE; 1198 else 1199 if (cflag & PARODD) 1200 port_settings.parity = WHITEHEAT_PAR_ODD; 1201 else 1202 port_settings.parity = WHITEHEAT_PAR_EVEN; 1203 else 1204 port_settings.parity = WHITEHEAT_PAR_NONE; 1205 dbg("%s - parity = %c", __FUNCTION__, port_settings.parity); 1206 1207 /* figure out the stop bits requested */ 1208 if (cflag & CSTOPB) 1209 port_settings.stop = 2; 1210 else 1211 port_settings.stop = 1; 1212 dbg("%s - stop bits = %d", __FUNCTION__, port_settings.stop); 1213 1214 /* figure out the flow control settings */ 1215 if (cflag & CRTSCTS) 1216 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | WHITEHEAT_HFLOW_RTS); 1217 else 1218 port_settings.hflow = WHITEHEAT_HFLOW_NONE; 1219 dbg("%s - hardware flow control = %s %s %s %s", __FUNCTION__, 1220 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "", 1221 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "", 1222 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "", 1223 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : ""); 1224 1225 /* determine software flow control */ 1226 if (I_IXOFF(port->tty)) 1227 port_settings.sflow = WHITEHEAT_SFLOW_RXTX; 1228 else 1229 port_settings.sflow = WHITEHEAT_SFLOW_NONE; 1230 dbg("%s - software flow control = %c", __FUNCTION__, port_settings.sflow); 1231 1232 port_settings.xon = START_CHAR(port->tty); 1233 port_settings.xoff = STOP_CHAR(port->tty); 1234 dbg("%s - XON = %2x, XOFF = %2x", __FUNCTION__, port_settings.xon, port_settings.xoff); 1235 1236 /* get the baud rate wanted */ 1237 port_settings.baud = tty_get_baud_rate(port->tty); 1238 dbg("%s - baud rate = %d", __FUNCTION__, port_settings.baud); 1239 1240 /* handle any settings that aren't specified in the tty structure */ 1241 port_settings.lloop = 0; 1242 1243 /* now send the message to the device */ 1244 return firm_send_command(port, WHITEHEAT_SETUP_PORT, (__u8 *)&port_settings, sizeof(port_settings)); 1245} 1246 1247 1248static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) { 1249 struct whiteheat_set_rdb rts_command; 1250 1251 rts_command.port = port->number - port->serial->minor + 1; 1252 rts_command.state = onoff; 1253 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&rts_command, sizeof(rts_command)); 1254} 1255 1256 1257static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) { 1258 struct whiteheat_set_rdb dtr_command; 1259 1260 dtr_command.port = port->number - port->serial->minor + 1; 1261 dtr_command.state = onoff; 1262 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&dtr_command, sizeof(dtr_command)); 1263} 1264 1265 1266static int firm_set_break(struct usb_serial_port *port, __u8 onoff) { 1267 struct whiteheat_set_rdb break_command; 1268 1269 break_command.port = port->number - port->serial->minor + 1; 1270 break_command.state = onoff; 1271 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&break_command, sizeof(break_command)); 1272} 1273 1274 1275static int firm_purge(struct usb_serial_port *port, __u8 rxtx) { 1276 struct whiteheat_purge purge_command; 1277 1278 purge_command.port = port->number - port->serial->minor + 1; 1279 purge_command.what = rxtx; 1280 return firm_send_command(port, WHITEHEAT_PURGE, (__u8 *)&purge_command, sizeof(purge_command)); 1281} 1282 1283 1284static int firm_get_dtr_rts(struct usb_serial_port *port) { 1285 struct whiteheat_simple get_dr_command; 1286 1287 get_dr_command.port = port->number - port->serial->minor + 1; 1288 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, (__u8 *)&get_dr_command, sizeof(get_dr_command)); 1289} 1290 1291 1292static int firm_report_tx_done(struct usb_serial_port *port) { 1293 struct whiteheat_simple close_command; 1294 1295 close_command.port = port->number - port->serial->minor + 1; 1296 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, (__u8 *)&close_command, sizeof(close_command)); 1297} 1298 1299 1300/***************************************************************************** 1301 * Connect Tech's White Heat utility functions 1302 *****************************************************************************/ 1303static int start_command_port(struct usb_serial *serial) 1304{ 1305 struct usb_serial_port *command_port; 1306 struct whiteheat_command_private *command_info; 1307 unsigned long flags; 1308 int retval = 0; 1309 1310 command_port = serial->port[COMMAND_PORT]; 1311 command_info = usb_get_serial_port_data(command_port); 1312 spin_lock_irqsave(&command_info->lock, flags); 1313 if (!command_info->port_running) { 1314 usb_clear_halt(serial->dev, command_port->read_urb->pipe); 1315 1316 command_port->read_urb->dev = serial->dev; 1317 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL); 1318 if (retval) { 1319 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval); 1320 goto exit; 1321 } 1322 } 1323 command_info->port_running++; 1324 1325exit: 1326 spin_unlock_irqrestore(&command_info->lock, flags); 1327 return retval; 1328} 1329 1330 1331static void stop_command_port(struct usb_serial *serial) 1332{ 1333 struct usb_serial_port *command_port; 1334 struct whiteheat_command_private *command_info; 1335 unsigned long flags; 1336 1337 command_port = serial->port[COMMAND_PORT]; 1338 command_info = usb_get_serial_port_data(command_port); 1339 spin_lock_irqsave(&command_info->lock, flags); 1340 command_info->port_running--; 1341 if (!command_info->port_running) 1342 usb_kill_urb(command_port->read_urb); 1343 spin_unlock_irqrestore(&command_info->lock, flags); 1344} 1345 1346 1347static int start_port_read(struct usb_serial_port *port) 1348{ 1349 struct whiteheat_private *info = usb_get_serial_port_data(port); 1350 struct whiteheat_urb_wrap *wrap; 1351 struct urb *urb; 1352 int retval = 0; 1353 unsigned long flags; 1354 struct list_head *tmp; 1355 struct list_head *tmp2; 1356 1357 spin_lock_irqsave(&info->lock, flags); 1358 1359 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 1360 list_del(tmp); 1361 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1362 urb = wrap->urb; 1363 urb->dev = port->serial->dev; 1364 retval = usb_submit_urb(urb, GFP_KERNEL); 1365 if (retval) { 1366 list_add(tmp, &info->rx_urbs_free); 1367 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 1368 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1369 urb = wrap->urb; 1370 usb_kill_urb(urb); 1371 list_move(tmp, &info->rx_urbs_free); 1372 } 1373 break; 1374 } 1375 list_add(tmp, &info->rx_urbs_submitted); 1376 } 1377 1378 spin_unlock_irqrestore(&info->lock, flags); 1379 1380 return retval; 1381} 1382 1383 1384static struct whiteheat_urb_wrap *urb_to_wrap(struct urb* urb, struct list_head *head) 1385{ 1386 struct whiteheat_urb_wrap *wrap; 1387 struct list_head *tmp; 1388 1389 list_for_each(tmp, head) { 1390 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1391 if (wrap->urb == urb) 1392 return wrap; 1393 } 1394 1395 return NULL; 1396} 1397 1398 1399static struct list_head *list_first(struct list_head *head) 1400{ 1401 return head->next; 1402} 1403 1404 1405static void rx_data_softint(struct work_struct *work) 1406{ 1407 struct whiteheat_private *info = 1408 container_of(work, struct whiteheat_private, rx_work); 1409 struct usb_serial_port *port = info->port; 1410 struct tty_struct *tty = port->tty; 1411 struct whiteheat_urb_wrap *wrap; 1412 struct urb *urb; 1413 unsigned long flags; 1414 struct list_head *tmp; 1415 struct list_head *tmp2; 1416 int result; 1417 int sent = 0; 1418 1419 spin_lock_irqsave(&info->lock, flags); 1420 if (info->flags & THROTTLED) { 1421 spin_unlock_irqrestore(&info->lock, flags); 1422 return; 1423 } 1424 1425 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) { 1426 list_del(tmp); 1427 spin_unlock_irqrestore(&info->lock, flags); 1428 1429 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1430 urb = wrap->urb; 1431 1432 if (tty && urb->actual_length) { 1433 int len = tty_buffer_request_room(tty, urb->actual_length); 1434 /* This stuff can go away now I suspect */ 1435 if (unlikely(len < urb->actual_length)) { 1436 spin_lock_irqsave(&info->lock, flags); 1437 list_add(tmp, &info->rx_urb_q); 1438 spin_unlock_irqrestore(&info->lock, flags); 1439 tty_flip_buffer_push(tty); 1440 schedule_work(&info->rx_work); 1441 return; 1442 } 1443 tty_insert_flip_string(tty, urb->transfer_buffer, len); 1444 sent += len; 1445 } 1446 1447 urb->dev = port->serial->dev; 1448 result = usb_submit_urb(urb, GFP_ATOMIC); 1449 if (result) { 1450 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); 1451 spin_lock_irqsave(&info->lock, flags); 1452 list_add(tmp, &info->rx_urbs_free); 1453 continue; 1454 } 1455 1456 spin_lock_irqsave(&info->lock, flags); 1457 list_add(tmp, &info->rx_urbs_submitted); 1458 } 1459 spin_unlock_irqrestore(&info->lock, flags); 1460 1461 if (sent) 1462 tty_flip_buffer_push(tty); 1463} 1464 1465 1466/***************************************************************************** 1467 * Connect Tech's White Heat module functions 1468 *****************************************************************************/ 1469static int __init whiteheat_init (void) 1470{ 1471 int retval; 1472 retval = usb_serial_register(&whiteheat_fake_device); 1473 if (retval) 1474 goto failed_fake_register; 1475 retval = usb_serial_register(&whiteheat_device); 1476 if (retval) 1477 goto failed_device_register; 1478 retval = usb_register(&whiteheat_driver); 1479 if (retval) 1480 goto failed_usb_register; 1481 info(DRIVER_DESC " " DRIVER_VERSION); 1482 return 0; 1483failed_usb_register: 1484 usb_serial_deregister(&whiteheat_device); 1485failed_device_register: 1486 usb_serial_deregister(&whiteheat_fake_device); 1487failed_fake_register: 1488 return retval; 1489} 1490 1491 1492static void __exit whiteheat_exit (void) 1493{ 1494 usb_deregister (&whiteheat_driver); 1495 usb_serial_deregister (&whiteheat_fake_device); 1496 usb_serial_deregister (&whiteheat_device); 1497} 1498 1499 1500module_init(whiteheat_init); 1501module_exit(whiteheat_exit); 1502 1503MODULE_AUTHOR( DRIVER_AUTHOR ); 1504MODULE_DESCRIPTION( DRIVER_DESC ); 1505MODULE_LICENSE("GPL"); 1506 1507module_param(urb_pool_size, int, 0); 1508MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering"); 1509 1510module_param(debug, bool, S_IRUGO | S_IWUSR); 1511MODULE_PARM_DESC(debug, "Debug enabled or not"); 1512