1 /* 2 * USB ConnectTech WhiteHEAT driver 3 * 4 * Copyright (C) 2002 5 * Connect Tech Inc. 6 * 7 * Copyright (C) 1999 - 2001 8 * Greg Kroah-Hartman (greg@kroah.com) 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * See Documentation/usb/usb-serial.txt for more information on using this 16 * driver 17 * 18 * (10/09/2002) Stuart MacDonald (stuartm@connecttech.com) 19 * Upgrade to full working driver 20 * 21 * (05/30/2001) gkh 22 * switched from using spinlock to a semaphore, which fixes lots of 23 * problems. 24 * 25 * (04/08/2001) gb 26 * Identify version on module load. 27 * 28 * 2001_Mar_19 gkh 29 * Fixed MOD_INC and MOD_DEC logic, the ability to open a port more 30 * than once, and the got the proper usb_device_id table entries so 31 * the driver works again. 32 * 33 * (11/01/2000) Adam J. Richter 34 * usb_device_id table support 35 * 36 * (10/05/2000) gkh 37 * Fixed bug with urb->dev not being set properly, now that the usb 38 * core needs it. 39 * 40 * (10/03/2000) smd 41 * firmware is improved to guard against crap sent to device 42 * firmware now replies CMD_FAILURE on bad things 43 * read_callback fix you provided for private info struct 44 * command_finished now indicates success or fail 45 * setup_port struct now packed to avoid gcc padding 46 * firmware uses 1 based port numbering, driver now handles that 47 * 48 * (09/11/2000) gkh 49 * Removed DEBUG #ifdefs with call to usb_serial_debug_data 50 * 51 * (07/19/2000) gkh 52 * Added module_init and module_exit functions to handle the fact that this 53 * driver is a loadable module now. 54 * Fixed bug with port->minor that was found by Al Borchers 55 * 56 * (07/04/2000) gkh 57 * Added support for port settings. Baud rate can now be changed. Line 58 * signals are not transferred to and from the tty layer yet, but things 59 * seem to be working well now. 60 * 61 * (05/04/2000) gkh 62 * First cut at open and close commands. Data can flow through the ports at 63 * default speeds now. 64 * 65 * (03/26/2000) gkh 66 * Split driver up into device specific pieces. 67 * 68 */ 69 70 #include <linux/kernel.h> 71 #include <linux/errno.h> 72 #include <linux/init.h> 73 #include <linux/slab.h> 74 #include <linux/tty.h> 75 #include <linux/tty_driver.h> 76 #include <linux/tty_flip.h> 77 #include <linux/module.h> 78 #include <linux/spinlock.h> 79 #include <linux/mutex.h> 80 #include <linux/uaccess.h> 81 #include <asm/termbits.h> 82 #include <linux/usb.h> 83 #include <linux/serial_reg.h> 84 #include <linux/serial.h> 85 #include <linux/usb/serial.h> 86 #include <linux/firmware.h> 87 #include <linux/ihex.h> 88 #include "whiteheat.h" /* WhiteHEAT specific commands */ 89 90 static int debug; 91 92 #ifndef CMSPAR 93 #define CMSPAR 0 94 #endif 95 96 /* 97 * Version Information 98 */ 99 #define DRIVER_VERSION "v2.0" 100 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>" 101 #define DRIVER_DESC "USB ConnectTech WhiteHEAT driver" 102 103 #define CONNECT_TECH_VENDOR_ID 0x0710 104 #define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001 105 #define CONNECT_TECH_WHITE_HEAT_ID 0x8001 106 107 /* 108 ID tables for whiteheat are unusual, because we want to different 109 things for different versions of the device. Eventually, this 110 will be doable from a single table. But, for now, we define two 111 separate ID tables, and then a third table that combines them 112 just for the purpose of exporting the autoloading information. 113 */ 114 static const struct usb_device_id id_table_std[] = { 115 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) }, 116 { } /* Terminating entry */ 117 }; 118 119 static const struct usb_device_id id_table_prerenumeration[] = { 120 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) }, 121 { } /* Terminating entry */ 122 }; 123 124 static const struct usb_device_id id_table_combined[] = { 125 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) }, 126 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) }, 127 { } /* Terminating entry */ 128 }; 129 130 MODULE_DEVICE_TABLE(usb, id_table_combined); 131 132 static struct usb_driver whiteheat_driver = { 133 .name = "whiteheat", 134 .probe = usb_serial_probe, 135 .disconnect = usb_serial_disconnect, 136 .id_table = id_table_combined, 137 .no_dynamic_id = 1, 138 }; 139 140 /* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */ 141 static int whiteheat_firmware_download(struct usb_serial *serial, 142 const struct usb_device_id *id); 143 static int whiteheat_firmware_attach(struct usb_serial *serial); 144 145 /* function prototypes for the Connect Tech WhiteHEAT serial converter */ 146 static int whiteheat_attach(struct usb_serial *serial); 147 static void whiteheat_release(struct usb_serial *serial); 148 static int whiteheat_open(struct tty_struct *tty, 149 struct usb_serial_port *port); 150 static void whiteheat_close(struct usb_serial_port *port); 151 static int whiteheat_write(struct tty_struct *tty, 152 struct usb_serial_port *port, 153 const unsigned char *buf, int count); 154 static int whiteheat_write_room(struct tty_struct *tty); 155 static int whiteheat_ioctl(struct tty_struct *tty, struct file *file, 156 unsigned int cmd, unsigned long arg); 157 static void whiteheat_set_termios(struct tty_struct *tty, 158 struct usb_serial_port *port, struct ktermios *old); 159 static int whiteheat_tiocmget(struct tty_struct *tty, struct file *file); 160 static int whiteheat_tiocmset(struct tty_struct *tty, struct file *file, 161 unsigned int set, unsigned int clear); 162 static void whiteheat_break_ctl(struct tty_struct *tty, int break_state); 163 static int whiteheat_chars_in_buffer(struct tty_struct *tty); 164 static void whiteheat_throttle(struct tty_struct *tty); 165 static void whiteheat_unthrottle(struct tty_struct *tty); 166 static void whiteheat_read_callback(struct urb *urb); 167 static void whiteheat_write_callback(struct urb *urb); 168 169 static struct usb_serial_driver whiteheat_fake_device = { 170 .driver = { 171 .owner = THIS_MODULE, 172 .name = "whiteheatnofirm", 173 }, 174 .description = "Connect Tech - WhiteHEAT - (prerenumeration)", 175 .usb_driver = &whiteheat_driver, 176 .id_table = id_table_prerenumeration, 177 .num_ports = 1, 178 .probe = whiteheat_firmware_download, 179 .attach = whiteheat_firmware_attach, 180 }; 181 182 static struct usb_serial_driver whiteheat_device = { 183 .driver = { 184 .owner = THIS_MODULE, 185 .name = "whiteheat", 186 }, 187 .description = "Connect Tech - WhiteHEAT", 188 .usb_driver = &whiteheat_driver, 189 .id_table = id_table_std, 190 .num_ports = 4, 191 .attach = whiteheat_attach, 192 .release = whiteheat_release, 193 .open = whiteheat_open, 194 .close = whiteheat_close, 195 .write = whiteheat_write, 196 .write_room = whiteheat_write_room, 197 .ioctl = whiteheat_ioctl, 198 .set_termios = whiteheat_set_termios, 199 .break_ctl = whiteheat_break_ctl, 200 .tiocmget = whiteheat_tiocmget, 201 .tiocmset = whiteheat_tiocmset, 202 .chars_in_buffer = whiteheat_chars_in_buffer, 203 .throttle = whiteheat_throttle, 204 .unthrottle = whiteheat_unthrottle, 205 .read_bulk_callback = whiteheat_read_callback, 206 .write_bulk_callback = whiteheat_write_callback, 207 }; 208 209 210 struct whiteheat_command_private { 211 struct mutex mutex; 212 __u8 port_running; 213 __u8 command_finished; 214 wait_queue_head_t wait_command; /* for handling sleeping whilst 215 waiting for a command to 216 finish */ 217 __u8 result_buffer[64]; 218 }; 219 220 221 #define THROTTLED 0x01 222 #define ACTUALLY_THROTTLED 0x02 223 224 static int urb_pool_size = 8; 225 226 struct whiteheat_urb_wrap { 227 struct list_head list; 228 struct urb *urb; 229 }; 230 231 struct whiteheat_private { 232 spinlock_t lock; 233 __u8 flags; 234 __u8 mcr; /* FIXME: no locking on mcr */ 235 struct list_head rx_urbs_free; 236 struct list_head rx_urbs_submitted; 237 struct list_head rx_urb_q; 238 struct work_struct rx_work; 239 struct usb_serial_port *port; 240 struct list_head tx_urbs_free; 241 struct list_head tx_urbs_submitted; 242 struct mutex deathwarrant; 243 }; 244 245 246 /* local function prototypes */ 247 static int start_command_port(struct usb_serial *serial); 248 static void stop_command_port(struct usb_serial *serial); 249 static void command_port_write_callback(struct urb *urb); 250 static void command_port_read_callback(struct urb *urb); 251 252 static int start_port_read(struct usb_serial_port *port); 253 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, 254 struct list_head *head); 255 static struct list_head *list_first(struct list_head *head); 256 static void rx_data_softint(struct work_struct *work); 257 258 static int firm_send_command(struct usb_serial_port *port, __u8 command, 259 __u8 *data, __u8 datasize); 260 static int firm_open(struct usb_serial_port *port); 261 static int firm_close(struct usb_serial_port *port); 262 static void firm_setup_port(struct tty_struct *tty); 263 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff); 264 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff); 265 static int firm_set_break(struct usb_serial_port *port, __u8 onoff); 266 static int firm_purge(struct usb_serial_port *port, __u8 rxtx); 267 static int firm_get_dtr_rts(struct usb_serial_port *port); 268 static int firm_report_tx_done(struct usb_serial_port *port); 269 270 271 #define COMMAND_PORT 4 272 #define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */ 273 #define COMMAND_TIMEOUT_MS 2000 274 #define CLOSING_DELAY (30 * HZ) 275 276 277 /***************************************************************************** 278 * Connect Tech's White Heat prerenumeration driver functions 279 *****************************************************************************/ 280 281 /* steps to download the firmware to the WhiteHEAT device: 282 - hold the reset (by writing to the reset bit of the CPUCS register) 283 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD 284 - release the reset (by writing to the CPUCS register) 285 - download the WH.HEX file for all addresses greater than 0x1b3f using 286 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD 287 - hold the reset 288 - download the WH.HEX file for all addresses less than 0x1b40 using 289 VENDOR_REQUEST_ANCHOR_LOAD 290 - release the reset 291 - device renumerated itself and comes up as new device id with all 292 firmware download completed. 293 */ 294 static int whiteheat_firmware_download(struct usb_serial *serial, 295 const struct usb_device_id *id) 296 { 297 int response, ret = -ENOENT; 298 const struct firmware *loader_fw = NULL, *firmware_fw = NULL; 299 const struct ihex_binrec *record; 300 301 dbg("%s", __func__); 302 303 if (request_ihex_firmware(&firmware_fw, "whiteheat.fw", 304 &serial->dev->dev)) { 305 dev_err(&serial->dev->dev, 306 "%s - request \"whiteheat.fw\" failed\n", __func__); 307 goto out; 308 } 309 if (request_ihex_firmware(&loader_fw, "whiteheat_loader.fw", 310 &serial->dev->dev)) { 311 dev_err(&serial->dev->dev, 312 "%s - request \"whiteheat_loader.fw\" failed\n", 313 __func__); 314 goto out; 315 } 316 ret = 0; 317 response = ezusb_set_reset (serial, 1); 318 319 record = (const struct ihex_binrec *)loader_fw->data; 320 while (record) { 321 response = ezusb_writememory (serial, be32_to_cpu(record->addr), 322 (unsigned char *)record->data, 323 be16_to_cpu(record->len), 0xa0); 324 if (response < 0) { 325 dev_err(&serial->dev->dev, "%s - ezusb_writememory " 326 "failed for loader (%d %04X %p %d)\n", 327 __func__, response, be32_to_cpu(record->addr), 328 record->data, be16_to_cpu(record->len)); 329 break; 330 } 331 record = ihex_next_binrec(record); 332 } 333 334 response = ezusb_set_reset(serial, 0); 335 336 record = (const struct ihex_binrec *)firmware_fw->data; 337 while (record && be32_to_cpu(record->addr) < 0x1b40) 338 record = ihex_next_binrec(record); 339 while (record) { 340 response = ezusb_writememory (serial, be32_to_cpu(record->addr), 341 (unsigned char *)record->data, 342 be16_to_cpu(record->len), 0xa3); 343 if (response < 0) { 344 dev_err(&serial->dev->dev, "%s - ezusb_writememory " 345 "failed for first firmware step " 346 "(%d %04X %p %d)\n", __func__, response, 347 be32_to_cpu(record->addr), record->data, 348 be16_to_cpu(record->len)); 349 break; 350 } 351 ++record; 352 } 353 354 response = ezusb_set_reset(serial, 1); 355 356 record = (const struct ihex_binrec *)firmware_fw->data; 357 while (record && be32_to_cpu(record->addr) < 0x1b40) { 358 response = ezusb_writememory (serial, be32_to_cpu(record->addr), 359 (unsigned char *)record->data, 360 be16_to_cpu(record->len), 0xa0); 361 if (response < 0) { 362 dev_err(&serial->dev->dev, "%s - ezusb_writememory " 363 "failed for second firmware step " 364 "(%d %04X %p %d)\n", __func__, response, 365 be32_to_cpu(record->addr), record->data, 366 be16_to_cpu(record->len)); 367 break; 368 } 369 ++record; 370 } 371 ret = 0; 372 response = ezusb_set_reset (serial, 0); 373 out: 374 release_firmware(loader_fw); 375 release_firmware(firmware_fw); 376 return ret; 377 } 378 379 380 static int whiteheat_firmware_attach(struct usb_serial *serial) 381 { 382 /* We want this device to fail to have a driver assigned to it */ 383 return 1; 384 } 385 386 387 /***************************************************************************** 388 * Connect Tech's White Heat serial driver functions 389 *****************************************************************************/ 390 static int whiteheat_attach(struct usb_serial *serial) 391 { 392 struct usb_serial_port *command_port; 393 struct whiteheat_command_private *command_info; 394 struct usb_serial_port *port; 395 struct whiteheat_private *info; 396 struct whiteheat_hw_info *hw_info; 397 int pipe; 398 int ret; 399 int alen; 400 __u8 *command; 401 __u8 *result; 402 int i; 403 int j; 404 struct urb *urb; 405 int buf_size; 406 struct whiteheat_urb_wrap *wrap; 407 struct list_head *tmp; 408 409 command_port = serial->port[COMMAND_PORT]; 410 411 pipe = usb_sndbulkpipe(serial->dev, 412 command_port->bulk_out_endpointAddress); 413 command = kmalloc(2, GFP_KERNEL); 414 if (!command) 415 goto no_command_buffer; 416 command[0] = WHITEHEAT_GET_HW_INFO; 417 command[1] = 0; 418 419 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL); 420 if (!result) 421 goto no_result_buffer; 422 /* 423 * When the module is reloaded the firmware is still there and 424 * the endpoints are still in the usb core unchanged. This is the 425 * unlinking bug in disguise. Same for the call below. 426 */ 427 usb_clear_halt(serial->dev, pipe); 428 ret = usb_bulk_msg(serial->dev, pipe, command, 2, 429 &alen, COMMAND_TIMEOUT_MS); 430 if (ret) { 431 dev_err(&serial->dev->dev, "%s: Couldn't send command [%d]\n", 432 serial->type->description, ret); 433 goto no_firmware; 434 } else if (alen != 2) { 435 dev_err(&serial->dev->dev, "%s: Send command incomplete [%d]\n", 436 serial->type->description, alen); 437 goto no_firmware; 438 } 439 440 pipe = usb_rcvbulkpipe(serial->dev, 441 command_port->bulk_in_endpointAddress); 442 /* See the comment on the usb_clear_halt() above */ 443 usb_clear_halt(serial->dev, pipe); 444 ret = usb_bulk_msg(serial->dev, pipe, result, 445 sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS); 446 if (ret) { 447 dev_err(&serial->dev->dev, "%s: Couldn't get results [%d]\n", 448 serial->type->description, ret); 449 goto no_firmware; 450 } else if (alen != sizeof(*hw_info) + 1) { 451 dev_err(&serial->dev->dev, "%s: Get results incomplete [%d]\n", 452 serial->type->description, alen); 453 goto no_firmware; 454 } else if (result[0] != command[0]) { 455 dev_err(&serial->dev->dev, "%s: Command failed [%d]\n", 456 serial->type->description, result[0]); 457 goto no_firmware; 458 } 459 460 hw_info = (struct whiteheat_hw_info *)&result[1]; 461 462 dev_info(&serial->dev->dev, "%s: Driver %s: Firmware v%d.%02d\n", 463 serial->type->description, DRIVER_VERSION, 464 hw_info->sw_major_rev, hw_info->sw_minor_rev); 465 466 for (i = 0; i < serial->num_ports; i++) { 467 port = serial->port[i]; 468 469 info = kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL); 470 if (info == NULL) { 471 dev_err(&port->dev, 472 "%s: Out of memory for port structures\n", 473 serial->type->description); 474 goto no_private; 475 } 476 477 spin_lock_init(&info->lock); 478 mutex_init(&info->deathwarrant); 479 info->flags = 0; 480 info->mcr = 0; 481 INIT_WORK(&info->rx_work, rx_data_softint); 482 info->port = port; 483 484 INIT_LIST_HEAD(&info->rx_urbs_free); 485 INIT_LIST_HEAD(&info->rx_urbs_submitted); 486 INIT_LIST_HEAD(&info->rx_urb_q); 487 INIT_LIST_HEAD(&info->tx_urbs_free); 488 INIT_LIST_HEAD(&info->tx_urbs_submitted); 489 490 for (j = 0; j < urb_pool_size; j++) { 491 urb = usb_alloc_urb(0, GFP_KERNEL); 492 if (!urb) { 493 dev_err(&port->dev, "No free urbs available\n"); 494 goto no_rx_urb; 495 } 496 buf_size = port->read_urb->transfer_buffer_length; 497 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 498 if (!urb->transfer_buffer) { 499 dev_err(&port->dev, 500 "Couldn't allocate urb buffer\n"); 501 goto no_rx_buf; 502 } 503 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 504 if (!wrap) { 505 dev_err(&port->dev, 506 "Couldn't allocate urb wrapper\n"); 507 goto no_rx_wrap; 508 } 509 usb_fill_bulk_urb(urb, serial->dev, 510 usb_rcvbulkpipe(serial->dev, 511 port->bulk_in_endpointAddress), 512 urb->transfer_buffer, buf_size, 513 whiteheat_read_callback, port); 514 wrap->urb = urb; 515 list_add(&wrap->list, &info->rx_urbs_free); 516 517 urb = usb_alloc_urb(0, GFP_KERNEL); 518 if (!urb) { 519 dev_err(&port->dev, "No free urbs available\n"); 520 goto no_tx_urb; 521 } 522 buf_size = port->write_urb->transfer_buffer_length; 523 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 524 if (!urb->transfer_buffer) { 525 dev_err(&port->dev, 526 "Couldn't allocate urb buffer\n"); 527 goto no_tx_buf; 528 } 529 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 530 if (!wrap) { 531 dev_err(&port->dev, 532 "Couldn't allocate urb wrapper\n"); 533 goto no_tx_wrap; 534 } 535 usb_fill_bulk_urb(urb, serial->dev, 536 usb_sndbulkpipe(serial->dev, 537 port->bulk_out_endpointAddress), 538 urb->transfer_buffer, buf_size, 539 whiteheat_write_callback, port); 540 wrap->urb = urb; 541 list_add(&wrap->list, &info->tx_urbs_free); 542 } 543 544 usb_set_serial_port_data(port, info); 545 } 546 547 command_info = kmalloc(sizeof(struct whiteheat_command_private), 548 GFP_KERNEL); 549 if (command_info == NULL) { 550 dev_err(&serial->dev->dev, 551 "%s: Out of memory for port structures\n", 552 serial->type->description); 553 goto no_command_private; 554 } 555 556 mutex_init(&command_info->mutex); 557 command_info->port_running = 0; 558 init_waitqueue_head(&command_info->wait_command); 559 usb_set_serial_port_data(command_port, command_info); 560 command_port->write_urb->complete = command_port_write_callback; 561 command_port->read_urb->complete = command_port_read_callback; 562 kfree(result); 563 kfree(command); 564 565 return 0; 566 567 no_firmware: 568 /* Firmware likely not running */ 569 dev_err(&serial->dev->dev, 570 "%s: Unable to retrieve firmware version, try replugging\n", 571 serial->type->description); 572 dev_err(&serial->dev->dev, 573 "%s: If the firmware is not running (status led not blinking)\n", 574 serial->type->description); 575 dev_err(&serial->dev->dev, 576 "%s: please contact support@connecttech.com\n", 577 serial->type->description); 578 kfree(result); 579 return -ENODEV; 580 581 no_command_private: 582 for (i = serial->num_ports - 1; i >= 0; i--) { 583 port = serial->port[i]; 584 info = usb_get_serial_port_data(port); 585 for (j = urb_pool_size - 1; j >= 0; j--) { 586 tmp = list_first(&info->tx_urbs_free); 587 list_del(tmp); 588 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 589 urb = wrap->urb; 590 kfree(wrap); 591 no_tx_wrap: 592 kfree(urb->transfer_buffer); 593 no_tx_buf: 594 usb_free_urb(urb); 595 no_tx_urb: 596 tmp = list_first(&info->rx_urbs_free); 597 list_del(tmp); 598 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 599 urb = wrap->urb; 600 kfree(wrap); 601 no_rx_wrap: 602 kfree(urb->transfer_buffer); 603 no_rx_buf: 604 usb_free_urb(urb); 605 no_rx_urb: 606 ; 607 } 608 kfree(info); 609 no_private: 610 ; 611 } 612 kfree(result); 613 no_result_buffer: 614 kfree(command); 615 no_command_buffer: 616 return -ENOMEM; 617 } 618 619 620 static void whiteheat_release(struct usb_serial *serial) 621 { 622 struct usb_serial_port *command_port; 623 struct usb_serial_port *port; 624 struct whiteheat_private *info; 625 struct whiteheat_urb_wrap *wrap; 626 struct urb *urb; 627 struct list_head *tmp; 628 struct list_head *tmp2; 629 int i; 630 631 dbg("%s", __func__); 632 633 /* free up our private data for our command port */ 634 command_port = serial->port[COMMAND_PORT]; 635 kfree(usb_get_serial_port_data(command_port)); 636 637 for (i = 0; i < serial->num_ports; i++) { 638 port = serial->port[i]; 639 info = usb_get_serial_port_data(port); 640 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 641 list_del(tmp); 642 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 643 urb = wrap->urb; 644 kfree(wrap); 645 kfree(urb->transfer_buffer); 646 usb_free_urb(urb); 647 } 648 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) { 649 list_del(tmp); 650 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 651 urb = wrap->urb; 652 kfree(wrap); 653 kfree(urb->transfer_buffer); 654 usb_free_urb(urb); 655 } 656 kfree(info); 657 } 658 659 return; 660 } 661 662 static int whiteheat_open(struct tty_struct *tty, struct usb_serial_port *port) 663 { 664 int retval = 0; 665 666 dbg("%s - port %d", __func__, port->number); 667 668 retval = start_command_port(port->serial); 669 if (retval) 670 goto exit; 671 672 if (tty) 673 tty->low_latency = 1; 674 675 /* send an open port command */ 676 retval = firm_open(port); 677 if (retval) { 678 stop_command_port(port->serial); 679 goto exit; 680 } 681 682 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX); 683 if (retval) { 684 firm_close(port); 685 stop_command_port(port->serial); 686 goto exit; 687 } 688 689 if (tty) 690 firm_setup_port(tty); 691 692 /* Work around HCD bugs */ 693 usb_clear_halt(port->serial->dev, port->read_urb->pipe); 694 usb_clear_halt(port->serial->dev, port->write_urb->pipe); 695 696 /* Start reading from the device */ 697 retval = start_port_read(port); 698 if (retval) { 699 dev_err(&port->dev, 700 "%s - failed submitting read urb, error %d\n", 701 __func__, retval); 702 firm_close(port); 703 stop_command_port(port->serial); 704 goto exit; 705 } 706 707 exit: 708 dbg("%s - exit, retval = %d", __func__, retval); 709 return retval; 710 } 711 712 713 static void whiteheat_close(struct usb_serial_port *port) 714 { 715 struct whiteheat_private *info = usb_get_serial_port_data(port); 716 struct whiteheat_urb_wrap *wrap; 717 struct urb *urb; 718 struct list_head *tmp; 719 struct list_head *tmp2; 720 721 dbg("%s - port %d", __func__, port->number); 722 723 firm_report_tx_done(port); 724 firm_close(port); 725 726 /* shutdown our bulk reads and writes */ 727 mutex_lock(&info->deathwarrant); 728 spin_lock_irq(&info->lock); 729 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 730 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 731 urb = wrap->urb; 732 list_del(tmp); 733 spin_unlock_irq(&info->lock); 734 usb_kill_urb(urb); 735 spin_lock_irq(&info->lock); 736 list_add(tmp, &info->rx_urbs_free); 737 } 738 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) 739 list_move(tmp, &info->rx_urbs_free); 740 list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) { 741 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 742 urb = wrap->urb; 743 list_del(tmp); 744 spin_unlock_irq(&info->lock); 745 usb_kill_urb(urb); 746 spin_lock_irq(&info->lock); 747 list_add(tmp, &info->tx_urbs_free); 748 } 749 spin_unlock_irq(&info->lock); 750 mutex_unlock(&info->deathwarrant); 751 stop_command_port(port->serial); 752 } 753 754 755 static int whiteheat_write(struct tty_struct *tty, 756 struct usb_serial_port *port, const unsigned char *buf, int count) 757 { 758 struct usb_serial *serial = port->serial; 759 struct whiteheat_private *info = usb_get_serial_port_data(port); 760 struct whiteheat_urb_wrap *wrap; 761 struct urb *urb; 762 int result; 763 int bytes; 764 int sent = 0; 765 unsigned long flags; 766 struct list_head *tmp; 767 768 dbg("%s - port %d", __func__, port->number); 769 770 if (count == 0) { 771 dbg("%s - write request of 0 bytes", __func__); 772 return (0); 773 } 774 775 while (count) { 776 spin_lock_irqsave(&info->lock, flags); 777 if (list_empty(&info->tx_urbs_free)) { 778 spin_unlock_irqrestore(&info->lock, flags); 779 break; 780 } 781 tmp = list_first(&info->tx_urbs_free); 782 list_del(tmp); 783 spin_unlock_irqrestore(&info->lock, flags); 784 785 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 786 urb = wrap->urb; 787 bytes = (count > port->bulk_out_size) ? 788 port->bulk_out_size : count; 789 memcpy(urb->transfer_buffer, buf + sent, bytes); 790 791 usb_serial_debug_data(debug, &port->dev, 792 __func__, bytes, urb->transfer_buffer); 793 794 urb->dev = serial->dev; 795 urb->transfer_buffer_length = bytes; 796 result = usb_submit_urb(urb, GFP_ATOMIC); 797 if (result) { 798 dev_err(&port->dev, 799 "%s - failed submitting write urb, error %d\n", 800 __func__, result); 801 sent = result; 802 spin_lock_irqsave(&info->lock, flags); 803 list_add(tmp, &info->tx_urbs_free); 804 spin_unlock_irqrestore(&info->lock, flags); 805 break; 806 } else { 807 sent += bytes; 808 count -= bytes; 809 spin_lock_irqsave(&info->lock, flags); 810 list_add(tmp, &info->tx_urbs_submitted); 811 spin_unlock_irqrestore(&info->lock, flags); 812 } 813 } 814 815 return sent; 816 } 817 818 static int whiteheat_write_room(struct tty_struct *tty) 819 { 820 struct usb_serial_port *port = tty->driver_data; 821 struct whiteheat_private *info = usb_get_serial_port_data(port); 822 struct list_head *tmp; 823 int room = 0; 824 unsigned long flags; 825 826 dbg("%s - port %d", __func__, port->number); 827 828 spin_lock_irqsave(&info->lock, flags); 829 list_for_each(tmp, &info->tx_urbs_free) 830 room++; 831 spin_unlock_irqrestore(&info->lock, flags); 832 room *= port->bulk_out_size; 833 834 dbg("%s - returns %d", __func__, room); 835 return (room); 836 } 837 838 static int whiteheat_tiocmget(struct tty_struct *tty, struct file *file) 839 { 840 struct usb_serial_port *port = tty->driver_data; 841 struct whiteheat_private *info = usb_get_serial_port_data(port); 842 unsigned int modem_signals = 0; 843 844 dbg("%s - port %d", __func__, port->number); 845 846 firm_get_dtr_rts(port); 847 if (info->mcr & UART_MCR_DTR) 848 modem_signals |= TIOCM_DTR; 849 if (info->mcr & UART_MCR_RTS) 850 modem_signals |= TIOCM_RTS; 851 852 return modem_signals; 853 } 854 855 static int whiteheat_tiocmset(struct tty_struct *tty, struct file *file, 856 unsigned int set, unsigned int clear) 857 { 858 struct usb_serial_port *port = tty->driver_data; 859 struct whiteheat_private *info = usb_get_serial_port_data(port); 860 861 dbg("%s - port %d", __func__, port->number); 862 863 if (set & TIOCM_RTS) 864 info->mcr |= UART_MCR_RTS; 865 if (set & TIOCM_DTR) 866 info->mcr |= UART_MCR_DTR; 867 868 if (clear & TIOCM_RTS) 869 info->mcr &= ~UART_MCR_RTS; 870 if (clear & TIOCM_DTR) 871 info->mcr &= ~UART_MCR_DTR; 872 873 firm_set_dtr(port, info->mcr & UART_MCR_DTR); 874 firm_set_rts(port, info->mcr & UART_MCR_RTS); 875 return 0; 876 } 877 878 879 static int whiteheat_ioctl(struct tty_struct *tty, struct file *file, 880 unsigned int cmd, unsigned long arg) 881 { 882 struct usb_serial_port *port = tty->driver_data; 883 struct serial_struct serstruct; 884 void __user *user_arg = (void __user *)arg; 885 886 dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); 887 888 switch (cmd) { 889 case TIOCGSERIAL: 890 memset(&serstruct, 0, sizeof(serstruct)); 891 serstruct.type = PORT_16654; 892 serstruct.line = port->serial->minor; 893 serstruct.port = port->number; 894 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 895 serstruct.xmit_fifo_size = port->bulk_out_size; 896 serstruct.custom_divisor = 0; 897 serstruct.baud_base = 460800; 898 serstruct.close_delay = CLOSING_DELAY; 899 serstruct.closing_wait = CLOSING_DELAY; 900 901 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct))) 902 return -EFAULT; 903 break; 904 default: 905 break; 906 } 907 908 return -ENOIOCTLCMD; 909 } 910 911 912 static void whiteheat_set_termios(struct tty_struct *tty, 913 struct usb_serial_port *port, struct ktermios *old_termios) 914 { 915 firm_setup_port(tty); 916 } 917 918 static void whiteheat_break_ctl(struct tty_struct *tty, int break_state) 919 { 920 struct usb_serial_port *port = tty->driver_data; 921 firm_set_break(port, break_state); 922 } 923 924 925 static int whiteheat_chars_in_buffer(struct tty_struct *tty) 926 { 927 struct usb_serial_port *port = tty->driver_data; 928 struct whiteheat_private *info = usb_get_serial_port_data(port); 929 struct list_head *tmp; 930 struct whiteheat_urb_wrap *wrap; 931 int chars = 0; 932 unsigned long flags; 933 934 dbg("%s - port %d", __func__, port->number); 935 936 spin_lock_irqsave(&info->lock, flags); 937 list_for_each(tmp, &info->tx_urbs_submitted) { 938 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 939 chars += wrap->urb->transfer_buffer_length; 940 } 941 spin_unlock_irqrestore(&info->lock, flags); 942 943 dbg("%s - returns %d", __func__, chars); 944 return chars; 945 } 946 947 948 static void whiteheat_throttle(struct tty_struct *tty) 949 { 950 struct usb_serial_port *port = tty->driver_data; 951 struct whiteheat_private *info = usb_get_serial_port_data(port); 952 953 dbg("%s - port %d", __func__, port->number); 954 955 spin_lock_irq(&info->lock); 956 info->flags |= THROTTLED; 957 spin_unlock_irq(&info->lock); 958 959 return; 960 } 961 962 963 static void whiteheat_unthrottle(struct tty_struct *tty) 964 { 965 struct usb_serial_port *port = tty->driver_data; 966 struct whiteheat_private *info = usb_get_serial_port_data(port); 967 int actually_throttled; 968 969 dbg("%s - port %d", __func__, port->number); 970 971 spin_lock_irq(&info->lock); 972 actually_throttled = info->flags & ACTUALLY_THROTTLED; 973 info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED); 974 spin_unlock_irq(&info->lock); 975 976 if (actually_throttled) 977 rx_data_softint(&info->rx_work); 978 979 return; 980 } 981 982 983 /***************************************************************************** 984 * Connect Tech's White Heat callback routines 985 *****************************************************************************/ 986 static void command_port_write_callback(struct urb *urb) 987 { 988 int status = urb->status; 989 990 dbg("%s", __func__); 991 992 if (status) { 993 dbg("nonzero urb status: %d", status); 994 return; 995 } 996 } 997 998 999 static void command_port_read_callback(struct urb *urb) 1000 { 1001 struct usb_serial_port *command_port = urb->context; 1002 struct whiteheat_command_private *command_info; 1003 int status = urb->status; 1004 unsigned char *data = urb->transfer_buffer; 1005 int result; 1006 1007 dbg("%s", __func__); 1008 1009 command_info = usb_get_serial_port_data(command_port); 1010 if (!command_info) { 1011 dbg("%s - command_info is NULL, exiting.", __func__); 1012 return; 1013 } 1014 if (status) { 1015 dbg("%s - nonzero urb status: %d", __func__, status); 1016 if (status != -ENOENT) 1017 command_info->command_finished = WHITEHEAT_CMD_FAILURE; 1018 wake_up(&command_info->wait_command); 1019 return; 1020 } 1021 1022 usb_serial_debug_data(debug, &command_port->dev, 1023 __func__, urb->actual_length, data); 1024 1025 if (data[0] == WHITEHEAT_CMD_COMPLETE) { 1026 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 1027 wake_up(&command_info->wait_command); 1028 } else if (data[0] == WHITEHEAT_CMD_FAILURE) { 1029 command_info->command_finished = WHITEHEAT_CMD_FAILURE; 1030 wake_up(&command_info->wait_command); 1031 } else if (data[0] == WHITEHEAT_EVENT) { 1032 /* These are unsolicited reports from the firmware, hence no 1033 waiting command to wakeup */ 1034 dbg("%s - event received", __func__); 1035 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) { 1036 memcpy(command_info->result_buffer, &data[1], 1037 urb->actual_length - 1); 1038 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 1039 wake_up(&command_info->wait_command); 1040 } else 1041 dbg("%s - bad reply from firmware", __func__); 1042 1043 /* Continue trying to always read */ 1044 command_port->read_urb->dev = command_port->serial->dev; 1045 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC); 1046 if (result) 1047 dbg("%s - failed resubmitting read urb, error %d", 1048 __func__, result); 1049 } 1050 1051 1052 static void whiteheat_read_callback(struct urb *urb) 1053 { 1054 struct usb_serial_port *port = urb->context; 1055 struct whiteheat_urb_wrap *wrap; 1056 unsigned char *data = urb->transfer_buffer; 1057 struct whiteheat_private *info = usb_get_serial_port_data(port); 1058 int status = urb->status; 1059 1060 dbg("%s - port %d", __func__, port->number); 1061 1062 spin_lock(&info->lock); 1063 wrap = urb_to_wrap(urb, &info->rx_urbs_submitted); 1064 if (!wrap) { 1065 spin_unlock(&info->lock); 1066 dev_err(&port->dev, "%s - Not my urb!\n", __func__); 1067 return; 1068 } 1069 list_del(&wrap->list); 1070 spin_unlock(&info->lock); 1071 1072 if (status) { 1073 dbg("%s - nonzero read bulk status received: %d", 1074 __func__, status); 1075 spin_lock(&info->lock); 1076 list_add(&wrap->list, &info->rx_urbs_free); 1077 spin_unlock(&info->lock); 1078 return; 1079 } 1080 1081 usb_serial_debug_data(debug, &port->dev, 1082 __func__, urb->actual_length, data); 1083 1084 spin_lock(&info->lock); 1085 list_add_tail(&wrap->list, &info->rx_urb_q); 1086 if (info->flags & THROTTLED) { 1087 info->flags |= ACTUALLY_THROTTLED; 1088 spin_unlock(&info->lock); 1089 return; 1090 } 1091 spin_unlock(&info->lock); 1092 1093 schedule_work(&info->rx_work); 1094 } 1095 1096 1097 static void whiteheat_write_callback(struct urb *urb) 1098 { 1099 struct usb_serial_port *port = urb->context; 1100 struct whiteheat_private *info = usb_get_serial_port_data(port); 1101 struct whiteheat_urb_wrap *wrap; 1102 int status = urb->status; 1103 1104 dbg("%s - port %d", __func__, port->number); 1105 1106 spin_lock(&info->lock); 1107 wrap = urb_to_wrap(urb, &info->tx_urbs_submitted); 1108 if (!wrap) { 1109 spin_unlock(&info->lock); 1110 dev_err(&port->dev, "%s - Not my urb!\n", __func__); 1111 return; 1112 } 1113 list_move(&wrap->list, &info->tx_urbs_free); 1114 spin_unlock(&info->lock); 1115 1116 if (status) { 1117 dbg("%s - nonzero write bulk status received: %d", 1118 __func__, status); 1119 return; 1120 } 1121 1122 usb_serial_port_softint(port); 1123 } 1124 1125 1126 /***************************************************************************** 1127 * Connect Tech's White Heat firmware interface 1128 *****************************************************************************/ 1129 static int firm_send_command(struct usb_serial_port *port, __u8 command, 1130 __u8 *data, __u8 datasize) 1131 { 1132 struct usb_serial_port *command_port; 1133 struct whiteheat_command_private *command_info; 1134 struct whiteheat_private *info; 1135 __u8 *transfer_buffer; 1136 int retval = 0; 1137 int t; 1138 1139 dbg("%s - command %d", __func__, command); 1140 1141 command_port = port->serial->port[COMMAND_PORT]; 1142 command_info = usb_get_serial_port_data(command_port); 1143 mutex_lock(&command_info->mutex); 1144 command_info->command_finished = false; 1145 1146 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer; 1147 transfer_buffer[0] = command; 1148 memcpy(&transfer_buffer[1], data, datasize); 1149 command_port->write_urb->transfer_buffer_length = datasize + 1; 1150 command_port->write_urb->dev = port->serial->dev; 1151 retval = usb_submit_urb(command_port->write_urb, GFP_NOIO); 1152 if (retval) { 1153 dbg("%s - submit urb failed", __func__); 1154 goto exit; 1155 } 1156 1157 /* wait for the command to complete */ 1158 t = wait_event_timeout(command_info->wait_command, 1159 (bool)command_info->command_finished, COMMAND_TIMEOUT); 1160 if (!t) 1161 usb_kill_urb(command_port->write_urb); 1162 1163 if (command_info->command_finished == false) { 1164 dbg("%s - command timed out.", __func__); 1165 retval = -ETIMEDOUT; 1166 goto exit; 1167 } 1168 1169 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) { 1170 dbg("%s - command failed.", __func__); 1171 retval = -EIO; 1172 goto exit; 1173 } 1174 1175 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) { 1176 dbg("%s - command completed.", __func__); 1177 switch (command) { 1178 case WHITEHEAT_GET_DTR_RTS: 1179 info = usb_get_serial_port_data(port); 1180 memcpy(&info->mcr, command_info->result_buffer, 1181 sizeof(struct whiteheat_dr_info)); 1182 break; 1183 } 1184 } 1185 exit: 1186 mutex_unlock(&command_info->mutex); 1187 return retval; 1188 } 1189 1190 1191 static int firm_open(struct usb_serial_port *port) 1192 { 1193 struct whiteheat_simple open_command; 1194 1195 open_command.port = port->number - port->serial->minor + 1; 1196 return firm_send_command(port, WHITEHEAT_OPEN, 1197 (__u8 *)&open_command, sizeof(open_command)); 1198 } 1199 1200 1201 static int firm_close(struct usb_serial_port *port) 1202 { 1203 struct whiteheat_simple close_command; 1204 1205 close_command.port = port->number - port->serial->minor + 1; 1206 return firm_send_command(port, WHITEHEAT_CLOSE, 1207 (__u8 *)&close_command, sizeof(close_command)); 1208 } 1209 1210 1211 static void firm_setup_port(struct tty_struct *tty) 1212 { 1213 struct usb_serial_port *port = tty->driver_data; 1214 struct whiteheat_port_settings port_settings; 1215 unsigned int cflag = tty->termios->c_cflag; 1216 1217 port_settings.port = port->number + 1; 1218 1219 /* get the byte size */ 1220 switch (cflag & CSIZE) { 1221 case CS5: port_settings.bits = 5; break; 1222 case CS6: port_settings.bits = 6; break; 1223 case CS7: port_settings.bits = 7; break; 1224 default: 1225 case CS8: port_settings.bits = 8; break; 1226 } 1227 dbg("%s - data bits = %d", __func__, port_settings.bits); 1228 1229 /* determine the parity */ 1230 if (cflag & PARENB) 1231 if (cflag & CMSPAR) 1232 if (cflag & PARODD) 1233 port_settings.parity = WHITEHEAT_PAR_MARK; 1234 else 1235 port_settings.parity = WHITEHEAT_PAR_SPACE; 1236 else 1237 if (cflag & PARODD) 1238 port_settings.parity = WHITEHEAT_PAR_ODD; 1239 else 1240 port_settings.parity = WHITEHEAT_PAR_EVEN; 1241 else 1242 port_settings.parity = WHITEHEAT_PAR_NONE; 1243 dbg("%s - parity = %c", __func__, port_settings.parity); 1244 1245 /* figure out the stop bits requested */ 1246 if (cflag & CSTOPB) 1247 port_settings.stop = 2; 1248 else 1249 port_settings.stop = 1; 1250 dbg("%s - stop bits = %d", __func__, port_settings.stop); 1251 1252 /* figure out the flow control settings */ 1253 if (cflag & CRTSCTS) 1254 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | 1255 WHITEHEAT_HFLOW_RTS); 1256 else 1257 port_settings.hflow = WHITEHEAT_HFLOW_NONE; 1258 dbg("%s - hardware flow control = %s %s %s %s", __func__, 1259 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "", 1260 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "", 1261 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "", 1262 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : ""); 1263 1264 /* determine software flow control */ 1265 if (I_IXOFF(tty)) 1266 port_settings.sflow = WHITEHEAT_SFLOW_RXTX; 1267 else 1268 port_settings.sflow = WHITEHEAT_SFLOW_NONE; 1269 dbg("%s - software flow control = %c", __func__, port_settings.sflow); 1270 1271 port_settings.xon = START_CHAR(tty); 1272 port_settings.xoff = STOP_CHAR(tty); 1273 dbg("%s - XON = %2x, XOFF = %2x", 1274 __func__, port_settings.xon, port_settings.xoff); 1275 1276 /* get the baud rate wanted */ 1277 port_settings.baud = tty_get_baud_rate(tty); 1278 dbg("%s - baud rate = %d", __func__, port_settings.baud); 1279 1280 /* fixme: should set validated settings */ 1281 tty_encode_baud_rate(tty, port_settings.baud, port_settings.baud); 1282 /* handle any settings that aren't specified in the tty structure */ 1283 port_settings.lloop = 0; 1284 1285 /* now send the message to the device */ 1286 firm_send_command(port, WHITEHEAT_SETUP_PORT, 1287 (__u8 *)&port_settings, sizeof(port_settings)); 1288 } 1289 1290 1291 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) 1292 { 1293 struct whiteheat_set_rdb rts_command; 1294 1295 rts_command.port = port->number - port->serial->minor + 1; 1296 rts_command.state = onoff; 1297 return firm_send_command(port, WHITEHEAT_SET_RTS, 1298 (__u8 *)&rts_command, sizeof(rts_command)); 1299 } 1300 1301 1302 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) 1303 { 1304 struct whiteheat_set_rdb dtr_command; 1305 1306 dtr_command.port = port->number - port->serial->minor + 1; 1307 dtr_command.state = onoff; 1308 return firm_send_command(port, WHITEHEAT_SET_DTR, 1309 (__u8 *)&dtr_command, sizeof(dtr_command)); 1310 } 1311 1312 1313 static int firm_set_break(struct usb_serial_port *port, __u8 onoff) 1314 { 1315 struct whiteheat_set_rdb break_command; 1316 1317 break_command.port = port->number - port->serial->minor + 1; 1318 break_command.state = onoff; 1319 return firm_send_command(port, WHITEHEAT_SET_BREAK, 1320 (__u8 *)&break_command, sizeof(break_command)); 1321 } 1322 1323 1324 static int firm_purge(struct usb_serial_port *port, __u8 rxtx) 1325 { 1326 struct whiteheat_purge purge_command; 1327 1328 purge_command.port = port->number - port->serial->minor + 1; 1329 purge_command.what = rxtx; 1330 return firm_send_command(port, WHITEHEAT_PURGE, 1331 (__u8 *)&purge_command, sizeof(purge_command)); 1332 } 1333 1334 1335 static int firm_get_dtr_rts(struct usb_serial_port *port) 1336 { 1337 struct whiteheat_simple get_dr_command; 1338 1339 get_dr_command.port = port->number - port->serial->minor + 1; 1340 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, 1341 (__u8 *)&get_dr_command, sizeof(get_dr_command)); 1342 } 1343 1344 1345 static int firm_report_tx_done(struct usb_serial_port *port) 1346 { 1347 struct whiteheat_simple close_command; 1348 1349 close_command.port = port->number - port->serial->minor + 1; 1350 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, 1351 (__u8 *)&close_command, sizeof(close_command)); 1352 } 1353 1354 1355 /***************************************************************************** 1356 * Connect Tech's White Heat utility functions 1357 *****************************************************************************/ 1358 static int start_command_port(struct usb_serial *serial) 1359 { 1360 struct usb_serial_port *command_port; 1361 struct whiteheat_command_private *command_info; 1362 int retval = 0; 1363 1364 command_port = serial->port[COMMAND_PORT]; 1365 command_info = usb_get_serial_port_data(command_port); 1366 mutex_lock(&command_info->mutex); 1367 if (!command_info->port_running) { 1368 /* Work around HCD bugs */ 1369 usb_clear_halt(serial->dev, command_port->read_urb->pipe); 1370 1371 command_port->read_urb->dev = serial->dev; 1372 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL); 1373 if (retval) { 1374 dev_err(&serial->dev->dev, 1375 "%s - failed submitting read urb, error %d\n", 1376 __func__, retval); 1377 goto exit; 1378 } 1379 } 1380 command_info->port_running++; 1381 1382 exit: 1383 mutex_unlock(&command_info->mutex); 1384 return retval; 1385 } 1386 1387 1388 static void stop_command_port(struct usb_serial *serial) 1389 { 1390 struct usb_serial_port *command_port; 1391 struct whiteheat_command_private *command_info; 1392 1393 command_port = serial->port[COMMAND_PORT]; 1394 command_info = usb_get_serial_port_data(command_port); 1395 mutex_lock(&command_info->mutex); 1396 command_info->port_running--; 1397 if (!command_info->port_running) 1398 usb_kill_urb(command_port->read_urb); 1399 mutex_unlock(&command_info->mutex); 1400 } 1401 1402 1403 static int start_port_read(struct usb_serial_port *port) 1404 { 1405 struct whiteheat_private *info = usb_get_serial_port_data(port); 1406 struct whiteheat_urb_wrap *wrap; 1407 struct urb *urb; 1408 int retval = 0; 1409 unsigned long flags; 1410 struct list_head *tmp; 1411 struct list_head *tmp2; 1412 1413 spin_lock_irqsave(&info->lock, flags); 1414 1415 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 1416 list_del(tmp); 1417 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1418 urb = wrap->urb; 1419 urb->dev = port->serial->dev; 1420 spin_unlock_irqrestore(&info->lock, flags); 1421 retval = usb_submit_urb(urb, GFP_KERNEL); 1422 if (retval) { 1423 spin_lock_irqsave(&info->lock, flags); 1424 list_add(tmp, &info->rx_urbs_free); 1425 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 1426 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1427 urb = wrap->urb; 1428 list_del(tmp); 1429 spin_unlock_irqrestore(&info->lock, flags); 1430 usb_kill_urb(urb); 1431 spin_lock_irqsave(&info->lock, flags); 1432 list_add(tmp, &info->rx_urbs_free); 1433 } 1434 break; 1435 } 1436 spin_lock_irqsave(&info->lock, flags); 1437 list_add(tmp, &info->rx_urbs_submitted); 1438 } 1439 1440 spin_unlock_irqrestore(&info->lock, flags); 1441 1442 return retval; 1443 } 1444 1445 1446 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, 1447 struct list_head *head) 1448 { 1449 struct whiteheat_urb_wrap *wrap; 1450 struct list_head *tmp; 1451 1452 list_for_each(tmp, head) { 1453 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1454 if (wrap->urb == urb) 1455 return wrap; 1456 } 1457 1458 return NULL; 1459 } 1460 1461 1462 static struct list_head *list_first(struct list_head *head) 1463 { 1464 return head->next; 1465 } 1466 1467 1468 static void rx_data_softint(struct work_struct *work) 1469 { 1470 struct whiteheat_private *info = 1471 container_of(work, struct whiteheat_private, rx_work); 1472 struct usb_serial_port *port = info->port; 1473 struct tty_struct *tty = tty_port_tty_get(&port->port); 1474 struct whiteheat_urb_wrap *wrap; 1475 struct urb *urb; 1476 unsigned long flags; 1477 struct list_head *tmp; 1478 struct list_head *tmp2; 1479 int result; 1480 int sent = 0; 1481 1482 spin_lock_irqsave(&info->lock, flags); 1483 if (info->flags & THROTTLED) { 1484 spin_unlock_irqrestore(&info->lock, flags); 1485 goto out; 1486 } 1487 1488 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) { 1489 list_del(tmp); 1490 spin_unlock_irqrestore(&info->lock, flags); 1491 1492 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1493 urb = wrap->urb; 1494 1495 if (tty && urb->actual_length) 1496 sent += tty_insert_flip_string(tty, 1497 urb->transfer_buffer, urb->actual_length); 1498 1499 urb->dev = port->serial->dev; 1500 result = usb_submit_urb(urb, GFP_ATOMIC); 1501 if (result) { 1502 dev_err(&port->dev, 1503 "%s - failed resubmitting read urb, error %d\n", 1504 __func__, result); 1505 spin_lock_irqsave(&info->lock, flags); 1506 list_add(tmp, &info->rx_urbs_free); 1507 continue; 1508 } 1509 1510 spin_lock_irqsave(&info->lock, flags); 1511 list_add(tmp, &info->rx_urbs_submitted); 1512 } 1513 spin_unlock_irqrestore(&info->lock, flags); 1514 1515 if (sent) 1516 tty_flip_buffer_push(tty); 1517 out: 1518 tty_kref_put(tty); 1519 } 1520 1521 1522 /***************************************************************************** 1523 * Connect Tech's White Heat module functions 1524 *****************************************************************************/ 1525 static int __init whiteheat_init(void) 1526 { 1527 int retval; 1528 retval = usb_serial_register(&whiteheat_fake_device); 1529 if (retval) 1530 goto failed_fake_register; 1531 retval = usb_serial_register(&whiteheat_device); 1532 if (retval) 1533 goto failed_device_register; 1534 retval = usb_register(&whiteheat_driver); 1535 if (retval) 1536 goto failed_usb_register; 1537 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 1538 DRIVER_DESC "\n"); 1539 return 0; 1540 failed_usb_register: 1541 usb_serial_deregister(&whiteheat_device); 1542 failed_device_register: 1543 usb_serial_deregister(&whiteheat_fake_device); 1544 failed_fake_register: 1545 return retval; 1546 } 1547 1548 1549 static void __exit whiteheat_exit(void) 1550 { 1551 usb_deregister(&whiteheat_driver); 1552 usb_serial_deregister(&whiteheat_fake_device); 1553 usb_serial_deregister(&whiteheat_device); 1554 } 1555 1556 1557 module_init(whiteheat_init); 1558 module_exit(whiteheat_exit); 1559 1560 MODULE_AUTHOR(DRIVER_AUTHOR); 1561 MODULE_DESCRIPTION(DRIVER_DESC); 1562 MODULE_LICENSE("GPL"); 1563 1564 MODULE_FIRMWARE("whiteheat.fw"); 1565 MODULE_FIRMWARE("whiteheat_loader.fw"); 1566 1567 module_param(urb_pool_size, int, 0); 1568 MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering"); 1569 1570 module_param(debug, bool, S_IRUGO | S_IWUSR); 1571 MODULE_PARM_DESC(debug, "Debug enabled or not"); 1572