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 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 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 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_shutdown(struct usb_serial *serial); 148 static int whiteheat_open(struct tty_struct *tty, 149 struct usb_serial_port *port, struct file *filp); 150 static void whiteheat_close(struct tty_struct *tty, 151 struct usb_serial_port *port, struct file *filp); 152 static int whiteheat_write(struct tty_struct *tty, 153 struct usb_serial_port *port, 154 const unsigned char *buf, int count); 155 static int whiteheat_write_room(struct tty_struct *tty); 156 static int whiteheat_ioctl(struct tty_struct *tty, struct file *file, 157 unsigned int cmd, unsigned long arg); 158 static void whiteheat_set_termios(struct tty_struct *tty, 159 struct usb_serial_port *port, struct ktermios *old); 160 static int whiteheat_tiocmget(struct tty_struct *tty, struct file *file); 161 static int whiteheat_tiocmset(struct tty_struct *tty, struct file *file, 162 unsigned int set, unsigned int clear); 163 static void whiteheat_break_ctl(struct tty_struct *tty, int break_state); 164 static int whiteheat_chars_in_buffer(struct tty_struct *tty); 165 static void whiteheat_throttle(struct tty_struct *tty); 166 static void whiteheat_unthrottle(struct tty_struct *tty); 167 static void whiteheat_read_callback(struct urb *urb); 168 static void whiteheat_write_callback(struct urb *urb); 169 170 static struct usb_serial_driver whiteheat_fake_device = { 171 .driver = { 172 .owner = THIS_MODULE, 173 .name = "whiteheatnofirm", 174 }, 175 .description = "Connect Tech - WhiteHEAT - (prerenumeration)", 176 .usb_driver = &whiteheat_driver, 177 .id_table = id_table_prerenumeration, 178 .num_ports = 1, 179 .probe = whiteheat_firmware_download, 180 .attach = whiteheat_firmware_attach, 181 }; 182 183 static struct usb_serial_driver whiteheat_device = { 184 .driver = { 185 .owner = THIS_MODULE, 186 .name = "whiteheat", 187 }, 188 .description = "Connect Tech - WhiteHEAT", 189 .usb_driver = &whiteheat_driver, 190 .id_table = id_table_std, 191 .num_ports = 4, 192 .attach = whiteheat_attach, 193 .shutdown = whiteheat_shutdown, 194 .open = whiteheat_open, 195 .close = whiteheat_close, 196 .write = whiteheat_write, 197 .write_room = whiteheat_write_room, 198 .ioctl = whiteheat_ioctl, 199 .set_termios = whiteheat_set_termios, 200 .break_ctl = whiteheat_break_ctl, 201 .tiocmget = whiteheat_tiocmget, 202 .tiocmset = whiteheat_tiocmset, 203 .chars_in_buffer = whiteheat_chars_in_buffer, 204 .throttle = whiteheat_throttle, 205 .unthrottle = whiteheat_unthrottle, 206 .read_bulk_callback = whiteheat_read_callback, 207 .write_bulk_callback = whiteheat_write_callback, 208 }; 209 210 211 struct whiteheat_command_private { 212 struct mutex mutex; 213 __u8 port_running; 214 __u8 command_finished; 215 wait_queue_head_t wait_command; /* for handling sleeping whilst 216 waiting for a command to 217 finish */ 218 __u8 result_buffer[64]; 219 }; 220 221 222 #define THROTTLED 0x01 223 #define ACTUALLY_THROTTLED 0x02 224 225 static int urb_pool_size = 8; 226 227 struct whiteheat_urb_wrap { 228 struct list_head list; 229 struct urb *urb; 230 }; 231 232 struct whiteheat_private { 233 spinlock_t lock; 234 __u8 flags; 235 __u8 mcr; /* FIXME: no locking on mcr */ 236 struct list_head rx_urbs_free; 237 struct list_head rx_urbs_submitted; 238 struct list_head rx_urb_q; 239 struct work_struct rx_work; 240 struct usb_serial_port *port; 241 struct list_head tx_urbs_free; 242 struct list_head tx_urbs_submitted; 243 struct mutex deathwarrant; 244 }; 245 246 247 /* local function prototypes */ 248 static int start_command_port(struct usb_serial *serial); 249 static void stop_command_port(struct usb_serial *serial); 250 static void command_port_write_callback(struct urb *urb); 251 static void command_port_read_callback(struct urb *urb); 252 253 static int start_port_read(struct usb_serial_port *port); 254 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, 255 struct list_head *head); 256 static struct list_head *list_first(struct list_head *head); 257 static void rx_data_softint(struct work_struct *work); 258 259 static int firm_send_command(struct usb_serial_port *port, __u8 command, 260 __u8 *data, __u8 datasize); 261 static int firm_open(struct usb_serial_port *port); 262 static int firm_close(struct usb_serial_port *port); 263 static int firm_setup_port(struct tty_struct *tty); 264 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff); 265 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff); 266 static int firm_set_break(struct usb_serial_port *port, __u8 onoff); 267 static int firm_purge(struct usb_serial_port *port, __u8 rxtx); 268 static int firm_get_dtr_rts(struct usb_serial_port *port); 269 static int firm_report_tx_done(struct usb_serial_port *port); 270 271 272 #define COMMAND_PORT 4 273 #define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */ 274 #define COMMAND_TIMEOUT_MS 2000 275 #define CLOSING_DELAY (30 * HZ) 276 277 278 /***************************************************************************** 279 * Connect Tech's White Heat prerenumeration driver functions 280 *****************************************************************************/ 281 282 /* steps to download the firmware to the WhiteHEAT device: 283 - hold the reset (by writing to the reset bit of the CPUCS register) 284 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD 285 - release the reset (by writing to the CPUCS register) 286 - download the WH.HEX file for all addresses greater than 0x1b3f using 287 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD 288 - hold the reset 289 - download the WH.HEX file for all addresses less than 0x1b40 using 290 VENDOR_REQUEST_ANCHOR_LOAD 291 - release the reset 292 - device renumerated itself and comes up as new device id with all 293 firmware download completed. 294 */ 295 static int whiteheat_firmware_download(struct usb_serial *serial, 296 const struct usb_device_id *id) 297 { 298 int response, ret = -ENOENT; 299 const struct firmware *loader_fw = NULL, *firmware_fw = NULL; 300 const struct ihex_binrec *record; 301 302 dbg("%s", __func__); 303 304 if (request_ihex_firmware(&firmware_fw, "whiteheat.fw", 305 &serial->dev->dev)) { 306 dev_err(&serial->dev->dev, 307 "%s - request \"whiteheat.fw\" failed\n", __func__); 308 goto out; 309 } 310 if (request_ihex_firmware(&loader_fw, "whiteheat_loader.fw", 311 &serial->dev->dev)) { 312 dev_err(&serial->dev->dev, 313 "%s - request \"whiteheat_loader.fw\" failed\n", 314 __func__); 315 goto out; 316 } 317 ret = 0; 318 response = ezusb_set_reset (serial, 1); 319 320 record = (const struct ihex_binrec *)loader_fw->data; 321 while (record) { 322 response = ezusb_writememory (serial, be32_to_cpu(record->addr), 323 (unsigned char *)record->data, 324 be16_to_cpu(record->len), 0xa0); 325 if (response < 0) { 326 dev_err(&serial->dev->dev, "%s - ezusb_writememory " 327 "failed for loader (%d %04X %p %d)\n", 328 __func__, response, be32_to_cpu(record->addr), 329 record->data, be16_to_cpu(record->len)); 330 break; 331 } 332 record = ihex_next_binrec(record); 333 } 334 335 response = ezusb_set_reset(serial, 0); 336 337 record = (const struct ihex_binrec *)firmware_fw->data; 338 while (record && be32_to_cpu(record->addr) < 0x1b40) 339 record = ihex_next_binrec(record); 340 while (record) { 341 response = ezusb_writememory (serial, be32_to_cpu(record->addr), 342 (unsigned char *)record->data, 343 be16_to_cpu(record->len), 0xa3); 344 if (response < 0) { 345 dev_err(&serial->dev->dev, "%s - ezusb_writememory " 346 "failed for first firmware step " 347 "(%d %04X %p %d)\n", __func__, response, 348 be32_to_cpu(record->addr), record->data, 349 be16_to_cpu(record->len)); 350 break; 351 } 352 ++record; 353 } 354 355 response = ezusb_set_reset(serial, 1); 356 357 record = (const struct ihex_binrec *)firmware_fw->data; 358 while (record && be32_to_cpu(record->addr) < 0x1b40) { 359 response = ezusb_writememory (serial, be32_to_cpu(record->addr), 360 (unsigned char *)record->data, 361 be16_to_cpu(record->len), 0xa0); 362 if (response < 0) { 363 dev_err(&serial->dev->dev, "%s - ezusb_writememory " 364 "failed for second firmware step " 365 "(%d %04X %p %d)\n", __func__, response, 366 be32_to_cpu(record->addr), record->data, 367 be16_to_cpu(record->len)); 368 break; 369 } 370 ++record; 371 } 372 ret = 0; 373 response = ezusb_set_reset (serial, 0); 374 out: 375 release_firmware(loader_fw); 376 release_firmware(firmware_fw); 377 return ret; 378 } 379 380 381 static int whiteheat_firmware_attach(struct usb_serial *serial) 382 { 383 /* We want this device to fail to have a driver assigned to it */ 384 return 1; 385 } 386 387 388 /***************************************************************************** 389 * Connect Tech's White Heat serial driver functions 390 *****************************************************************************/ 391 static int whiteheat_attach(struct usb_serial *serial) 392 { 393 struct usb_serial_port *command_port; 394 struct whiteheat_command_private *command_info; 395 struct usb_serial_port *port; 396 struct whiteheat_private *info; 397 struct whiteheat_hw_info *hw_info; 398 int pipe; 399 int ret; 400 int alen; 401 __u8 *command; 402 __u8 *result; 403 int i; 404 int j; 405 struct urb *urb; 406 int buf_size; 407 struct whiteheat_urb_wrap *wrap; 408 struct list_head *tmp; 409 410 command_port = serial->port[COMMAND_PORT]; 411 412 pipe = usb_sndbulkpipe(serial->dev, 413 command_port->bulk_out_endpointAddress); 414 command = kmalloc(2, GFP_KERNEL); 415 if (!command) 416 goto no_command_buffer; 417 command[0] = WHITEHEAT_GET_HW_INFO; 418 command[1] = 0; 419 420 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL); 421 if (!result) 422 goto no_result_buffer; 423 /* 424 * When the module is reloaded the firmware is still there and 425 * the endpoints are still in the usb core unchanged. This is the 426 * unlinking bug in disguise. Same for the call below. 427 */ 428 usb_clear_halt(serial->dev, pipe); 429 ret = usb_bulk_msg(serial->dev, pipe, command, 2, 430 &alen, COMMAND_TIMEOUT_MS); 431 if (ret) { 432 dev_err(&serial->dev->dev, "%s: Couldn't send command [%d]\n", 433 serial->type->description, ret); 434 goto no_firmware; 435 } else if (alen != 2) { 436 dev_err(&serial->dev->dev, "%s: Send command incomplete [%d]\n", 437 serial->type->description, alen); 438 goto no_firmware; 439 } 440 441 pipe = usb_rcvbulkpipe(serial->dev, 442 command_port->bulk_in_endpointAddress); 443 /* See the comment on the usb_clear_halt() above */ 444 usb_clear_halt(serial->dev, pipe); 445 ret = usb_bulk_msg(serial->dev, pipe, result, 446 sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS); 447 if (ret) { 448 dev_err(&serial->dev->dev, "%s: Couldn't get results [%d]\n", 449 serial->type->description, ret); 450 goto no_firmware; 451 } else if (alen != sizeof(*hw_info) + 1) { 452 dev_err(&serial->dev->dev, "%s: Get results incomplete [%d]\n", 453 serial->type->description, alen); 454 goto no_firmware; 455 } else if (result[0] != command[0]) { 456 dev_err(&serial->dev->dev, "%s: Command failed [%d]\n", 457 serial->type->description, result[0]); 458 goto no_firmware; 459 } 460 461 hw_info = (struct whiteheat_hw_info *)&result[1]; 462 463 dev_info(&serial->dev->dev, "%s: Driver %s: Firmware v%d.%02d\n", 464 serial->type->description, DRIVER_VERSION, 465 hw_info->sw_major_rev, hw_info->sw_minor_rev); 466 467 for (i = 0; i < serial->num_ports; i++) { 468 port = serial->port[i]; 469 470 info = kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL); 471 if (info == NULL) { 472 dev_err(&port->dev, 473 "%s: Out of memory for port structures\n", 474 serial->type->description); 475 goto no_private; 476 } 477 478 spin_lock_init(&info->lock); 479 mutex_init(&info->deathwarrant); 480 info->flags = 0; 481 info->mcr = 0; 482 INIT_WORK(&info->rx_work, rx_data_softint); 483 info->port = port; 484 485 INIT_LIST_HEAD(&info->rx_urbs_free); 486 INIT_LIST_HEAD(&info->rx_urbs_submitted); 487 INIT_LIST_HEAD(&info->rx_urb_q); 488 INIT_LIST_HEAD(&info->tx_urbs_free); 489 INIT_LIST_HEAD(&info->tx_urbs_submitted); 490 491 for (j = 0; j < urb_pool_size; j++) { 492 urb = usb_alloc_urb(0, GFP_KERNEL); 493 if (!urb) { 494 dev_err(&port->dev, "No free urbs available\n"); 495 goto no_rx_urb; 496 } 497 buf_size = port->read_urb->transfer_buffer_length; 498 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 499 if (!urb->transfer_buffer) { 500 dev_err(&port->dev, 501 "Couldn't allocate urb buffer\n"); 502 goto no_rx_buf; 503 } 504 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 505 if (!wrap) { 506 dev_err(&port->dev, 507 "Couldn't allocate urb wrapper\n"); 508 goto no_rx_wrap; 509 } 510 usb_fill_bulk_urb(urb, serial->dev, 511 usb_rcvbulkpipe(serial->dev, 512 port->bulk_in_endpointAddress), 513 urb->transfer_buffer, buf_size, 514 whiteheat_read_callback, port); 515 wrap->urb = urb; 516 list_add(&wrap->list, &info->rx_urbs_free); 517 518 urb = usb_alloc_urb(0, GFP_KERNEL); 519 if (!urb) { 520 dev_err(&port->dev, "No free urbs available\n"); 521 goto no_tx_urb; 522 } 523 buf_size = port->write_urb->transfer_buffer_length; 524 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 525 if (!urb->transfer_buffer) { 526 dev_err(&port->dev, 527 "Couldn't allocate urb buffer\n"); 528 goto no_tx_buf; 529 } 530 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 531 if (!wrap) { 532 dev_err(&port->dev, 533 "Couldn't allocate urb wrapper\n"); 534 goto no_tx_wrap; 535 } 536 usb_fill_bulk_urb(urb, serial->dev, 537 usb_sndbulkpipe(serial->dev, 538 port->bulk_out_endpointAddress), 539 urb->transfer_buffer, buf_size, 540 whiteheat_write_callback, port); 541 wrap->urb = urb; 542 list_add(&wrap->list, &info->tx_urbs_free); 543 } 544 545 usb_set_serial_port_data(port, info); 546 } 547 548 command_info = kmalloc(sizeof(struct whiteheat_command_private), 549 GFP_KERNEL); 550 if (command_info == NULL) { 551 dev_err(&serial->dev->dev, 552 "%s: Out of memory for port structures\n", 553 serial->type->description); 554 goto no_command_private; 555 } 556 557 mutex_init(&command_info->mutex); 558 command_info->port_running = 0; 559 init_waitqueue_head(&command_info->wait_command); 560 usb_set_serial_port_data(command_port, command_info); 561 command_port->write_urb->complete = command_port_write_callback; 562 command_port->read_urb->complete = command_port_read_callback; 563 kfree(result); 564 kfree(command); 565 566 return 0; 567 568 no_firmware: 569 /* Firmware likely not running */ 570 dev_err(&serial->dev->dev, 571 "%s: Unable to retrieve firmware version, try replugging\n", 572 serial->type->description); 573 dev_err(&serial->dev->dev, 574 "%s: If the firmware is not running (status led not blinking)\n", 575 serial->type->description); 576 dev_err(&serial->dev->dev, 577 "%s: please contact support@connecttech.com\n", 578 serial->type->description); 579 kfree(result); 580 return -ENODEV; 581 582 no_command_private: 583 for (i = serial->num_ports - 1; i >= 0; i--) { 584 port = serial->port[i]; 585 info = usb_get_serial_port_data(port); 586 for (j = urb_pool_size - 1; j >= 0; j--) { 587 tmp = list_first(&info->tx_urbs_free); 588 list_del(tmp); 589 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 590 urb = wrap->urb; 591 kfree(wrap); 592 no_tx_wrap: 593 kfree(urb->transfer_buffer); 594 no_tx_buf: 595 usb_free_urb(urb); 596 no_tx_urb: 597 tmp = list_first(&info->rx_urbs_free); 598 list_del(tmp); 599 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 600 urb = wrap->urb; 601 kfree(wrap); 602 no_rx_wrap: 603 kfree(urb->transfer_buffer); 604 no_rx_buf: 605 usb_free_urb(urb); 606 no_rx_urb: 607 ; 608 } 609 kfree(info); 610 no_private: 611 ; 612 } 613 kfree(result); 614 no_result_buffer: 615 kfree(command); 616 no_command_buffer: 617 return -ENOMEM; 618 } 619 620 621 static void whiteheat_shutdown(struct usb_serial *serial) 622 { 623 struct usb_serial_port *command_port; 624 struct usb_serial_port *port; 625 struct whiteheat_private *info; 626 struct whiteheat_urb_wrap *wrap; 627 struct urb *urb; 628 struct list_head *tmp; 629 struct list_head *tmp2; 630 int i; 631 632 dbg("%s", __func__); 633 634 /* free up our private data for our command port */ 635 command_port = serial->port[COMMAND_PORT]; 636 kfree(usb_get_serial_port_data(command_port)); 637 638 for (i = 0; i < serial->num_ports; i++) { 639 port = serial->port[i]; 640 info = usb_get_serial_port_data(port); 641 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 642 list_del(tmp); 643 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 644 urb = wrap->urb; 645 kfree(wrap); 646 kfree(urb->transfer_buffer); 647 usb_free_urb(urb); 648 } 649 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) { 650 list_del(tmp); 651 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 652 urb = wrap->urb; 653 kfree(wrap); 654 kfree(urb->transfer_buffer); 655 usb_free_urb(urb); 656 } 657 kfree(info); 658 } 659 660 return; 661 } 662 663 static int whiteheat_open(struct tty_struct *tty, 664 struct usb_serial_port *port, struct file *filp) 665 { 666 int retval = 0; 667 668 dbg("%s - port %d", __func__, port->number); 669 670 retval = start_command_port(port->serial); 671 if (retval) 672 goto exit; 673 674 if (tty) 675 tty->low_latency = 1; 676 677 /* send an open port command */ 678 retval = firm_open(port); 679 if (retval) { 680 stop_command_port(port->serial); 681 goto exit; 682 } 683 684 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX); 685 if (retval) { 686 firm_close(port); 687 stop_command_port(port->serial); 688 goto exit; 689 } 690 691 if (tty) 692 firm_setup_port(tty); 693 694 /* Work around HCD bugs */ 695 usb_clear_halt(port->serial->dev, port->read_urb->pipe); 696 usb_clear_halt(port->serial->dev, port->write_urb->pipe); 697 698 /* Start reading from the device */ 699 retval = start_port_read(port); 700 if (retval) { 701 dev_err(&port->dev, 702 "%s - failed submitting read urb, error %d\n", 703 __func__, retval); 704 firm_close(port); 705 stop_command_port(port->serial); 706 goto exit; 707 } 708 709 exit: 710 dbg("%s - exit, retval = %d", __func__, retval); 711 return retval; 712 } 713 714 715 static void whiteheat_close(struct tty_struct *tty, 716 struct usb_serial_port *port, struct file *filp) 717 { 718 struct whiteheat_private *info = usb_get_serial_port_data(port); 719 struct whiteheat_urb_wrap *wrap; 720 struct urb *urb; 721 struct list_head *tmp; 722 struct list_head *tmp2; 723 724 dbg("%s - port %d", __func__, port->number); 725 726 mutex_lock(&port->serial->disc_mutex); 727 /* filp is NULL when called from usb_serial_disconnect */ 728 if ((filp && (tty_hung_up_p(filp))) || port->serial->disconnected) { 729 mutex_unlock(&port->serial->disc_mutex); 730 return; 731 } 732 mutex_unlock(&port->serial->disc_mutex); 733 734 tty->closing = 1; 735 736 /* 737 * Not currently in use; tty_wait_until_sent() calls 738 * serial_chars_in_buffer() which deadlocks on the second semaphore 739 * acquisition. This should be fixed at some point. Greg's been 740 * notified. 741 if ((filp->f_flags & (O_NDELAY | O_NONBLOCK)) == 0) { 742 tty_wait_until_sent(tty, CLOSING_DELAY); 743 } 744 */ 745 746 tty_driver_flush_buffer(tty); 747 tty_ldisc_flush(tty); 748 749 firm_report_tx_done(port); 750 751 firm_close(port); 752 753 /* shutdown our bulk reads and writes */ 754 mutex_lock(&info->deathwarrant); 755 spin_lock_irq(&info->lock); 756 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 757 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 758 urb = wrap->urb; 759 list_del(tmp); 760 spin_unlock_irq(&info->lock); 761 usb_kill_urb(urb); 762 spin_lock_irq(&info->lock); 763 list_add(tmp, &info->rx_urbs_free); 764 } 765 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) 766 list_move(tmp, &info->rx_urbs_free); 767 list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) { 768 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 769 urb = wrap->urb; 770 list_del(tmp); 771 spin_unlock_irq(&info->lock); 772 usb_kill_urb(urb); 773 spin_lock_irq(&info->lock); 774 list_add(tmp, &info->tx_urbs_free); 775 } 776 spin_unlock_irq(&info->lock); 777 mutex_unlock(&info->deathwarrant); 778 779 stop_command_port(port->serial); 780 781 tty->closing = 0; 782 } 783 784 785 static int whiteheat_write(struct tty_struct *tty, 786 struct usb_serial_port *port, const unsigned char *buf, int count) 787 { 788 struct usb_serial *serial = port->serial; 789 struct whiteheat_private *info = usb_get_serial_port_data(port); 790 struct whiteheat_urb_wrap *wrap; 791 struct urb *urb; 792 int result; 793 int bytes; 794 int sent = 0; 795 unsigned long flags; 796 struct list_head *tmp; 797 798 dbg("%s - port %d", __func__, port->number); 799 800 if (count == 0) { 801 dbg("%s - write request of 0 bytes", __func__); 802 return (0); 803 } 804 805 while (count) { 806 spin_lock_irqsave(&info->lock, flags); 807 if (list_empty(&info->tx_urbs_free)) { 808 spin_unlock_irqrestore(&info->lock, flags); 809 break; 810 } 811 tmp = list_first(&info->tx_urbs_free); 812 list_del(tmp); 813 spin_unlock_irqrestore(&info->lock, flags); 814 815 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 816 urb = wrap->urb; 817 bytes = (count > port->bulk_out_size) ? 818 port->bulk_out_size : count; 819 memcpy(urb->transfer_buffer, buf + sent, bytes); 820 821 usb_serial_debug_data(debug, &port->dev, 822 __func__, bytes, urb->transfer_buffer); 823 824 urb->dev = serial->dev; 825 urb->transfer_buffer_length = bytes; 826 result = usb_submit_urb(urb, GFP_ATOMIC); 827 if (result) { 828 dev_err(&port->dev, 829 "%s - failed submitting write urb, error %d\n", 830 __func__, result); 831 sent = result; 832 spin_lock_irqsave(&info->lock, flags); 833 list_add(tmp, &info->tx_urbs_free); 834 spin_unlock_irqrestore(&info->lock, flags); 835 break; 836 } else { 837 sent += bytes; 838 count -= bytes; 839 spin_lock_irqsave(&info->lock, flags); 840 list_add(tmp, &info->tx_urbs_submitted); 841 spin_unlock_irqrestore(&info->lock, flags); 842 } 843 } 844 845 return sent; 846 } 847 848 static int whiteheat_write_room(struct tty_struct *tty) 849 { 850 struct usb_serial_port *port = tty->driver_data; 851 struct whiteheat_private *info = usb_get_serial_port_data(port); 852 struct list_head *tmp; 853 int room = 0; 854 unsigned long flags; 855 856 dbg("%s - port %d", __func__, port->number); 857 858 spin_lock_irqsave(&info->lock, flags); 859 list_for_each(tmp, &info->tx_urbs_free) 860 room++; 861 spin_unlock_irqrestore(&info->lock, flags); 862 room *= port->bulk_out_size; 863 864 dbg("%s - returns %d", __func__, room); 865 return (room); 866 } 867 868 static int whiteheat_tiocmget(struct tty_struct *tty, struct file *file) 869 { 870 struct usb_serial_port *port = tty->driver_data; 871 struct whiteheat_private *info = usb_get_serial_port_data(port); 872 unsigned int modem_signals = 0; 873 874 dbg("%s - port %d", __func__, port->number); 875 876 firm_get_dtr_rts(port); 877 if (info->mcr & UART_MCR_DTR) 878 modem_signals |= TIOCM_DTR; 879 if (info->mcr & UART_MCR_RTS) 880 modem_signals |= TIOCM_RTS; 881 882 return modem_signals; 883 } 884 885 static int whiteheat_tiocmset(struct tty_struct *tty, struct file *file, 886 unsigned int set, unsigned int clear) 887 { 888 struct usb_serial_port *port = tty->driver_data; 889 struct whiteheat_private *info = usb_get_serial_port_data(port); 890 891 dbg("%s - port %d", __func__, port->number); 892 893 if (set & TIOCM_RTS) 894 info->mcr |= UART_MCR_RTS; 895 if (set & TIOCM_DTR) 896 info->mcr |= UART_MCR_DTR; 897 898 if (clear & TIOCM_RTS) 899 info->mcr &= ~UART_MCR_RTS; 900 if (clear & TIOCM_DTR) 901 info->mcr &= ~UART_MCR_DTR; 902 903 firm_set_dtr(port, info->mcr & UART_MCR_DTR); 904 firm_set_rts(port, info->mcr & UART_MCR_RTS); 905 return 0; 906 } 907 908 909 static int whiteheat_ioctl(struct tty_struct *tty, struct file *file, 910 unsigned int cmd, unsigned long arg) 911 { 912 struct usb_serial_port *port = tty->driver_data; 913 struct serial_struct serstruct; 914 void __user *user_arg = (void __user *)arg; 915 916 dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); 917 918 switch (cmd) { 919 case TIOCGSERIAL: 920 memset(&serstruct, 0, sizeof(serstruct)); 921 serstruct.type = PORT_16654; 922 serstruct.line = port->serial->minor; 923 serstruct.port = port->number; 924 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 925 serstruct.xmit_fifo_size = port->bulk_out_size; 926 serstruct.custom_divisor = 0; 927 serstruct.baud_base = 460800; 928 serstruct.close_delay = CLOSING_DELAY; 929 serstruct.closing_wait = CLOSING_DELAY; 930 931 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct))) 932 return -EFAULT; 933 break; 934 default: 935 break; 936 } 937 938 return -ENOIOCTLCMD; 939 } 940 941 942 static void whiteheat_set_termios(struct tty_struct *tty, 943 struct usb_serial_port *port, struct ktermios *old_termios) 944 { 945 firm_setup_port(tty); 946 } 947 948 static void whiteheat_break_ctl(struct tty_struct *tty, int break_state) 949 { 950 struct usb_serial_port *port = tty->driver_data; 951 firm_set_break(port, break_state); 952 } 953 954 955 static int whiteheat_chars_in_buffer(struct tty_struct *tty) 956 { 957 struct usb_serial_port *port = tty->driver_data; 958 struct whiteheat_private *info = usb_get_serial_port_data(port); 959 struct list_head *tmp; 960 struct whiteheat_urb_wrap *wrap; 961 int chars = 0; 962 unsigned long flags; 963 964 dbg("%s - port %d", __func__, port->number); 965 966 spin_lock_irqsave(&info->lock, flags); 967 list_for_each(tmp, &info->tx_urbs_submitted) { 968 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 969 chars += wrap->urb->transfer_buffer_length; 970 } 971 spin_unlock_irqrestore(&info->lock, flags); 972 973 dbg("%s - returns %d", __func__, chars); 974 return chars; 975 } 976 977 978 static void whiteheat_throttle(struct tty_struct *tty) 979 { 980 struct usb_serial_port *port = tty->driver_data; 981 struct whiteheat_private *info = usb_get_serial_port_data(port); 982 unsigned long flags; 983 984 dbg("%s - port %d", __func__, port->number); 985 986 spin_lock_irqsave(&info->lock, flags); 987 info->flags |= THROTTLED; 988 spin_unlock_irqrestore(&info->lock, flags); 989 990 return; 991 } 992 993 994 static void whiteheat_unthrottle(struct tty_struct *tty) 995 { 996 struct usb_serial_port *port = tty->driver_data; 997 struct whiteheat_private *info = usb_get_serial_port_data(port); 998 int actually_throttled; 999 unsigned long flags; 1000 1001 dbg("%s - port %d", __func__, port->number); 1002 1003 spin_lock_irqsave(&info->lock, flags); 1004 actually_throttled = info->flags & ACTUALLY_THROTTLED; 1005 info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED); 1006 spin_unlock_irqrestore(&info->lock, flags); 1007 1008 if (actually_throttled) 1009 rx_data_softint(&info->rx_work); 1010 1011 return; 1012 } 1013 1014 1015 /***************************************************************************** 1016 * Connect Tech's White Heat callback routines 1017 *****************************************************************************/ 1018 static void command_port_write_callback(struct urb *urb) 1019 { 1020 int status = urb->status; 1021 1022 dbg("%s", __func__); 1023 1024 if (status) { 1025 dbg("nonzero urb status: %d", status); 1026 return; 1027 } 1028 } 1029 1030 1031 static void command_port_read_callback(struct urb *urb) 1032 { 1033 struct usb_serial_port *command_port = urb->context; 1034 struct whiteheat_command_private *command_info; 1035 int status = urb->status; 1036 unsigned char *data = urb->transfer_buffer; 1037 int result; 1038 1039 dbg("%s", __func__); 1040 1041 command_info = usb_get_serial_port_data(command_port); 1042 if (!command_info) { 1043 dbg("%s - command_info is NULL, exiting.", __func__); 1044 return; 1045 } 1046 if (status) { 1047 dbg("%s - nonzero urb status: %d", __func__, status); 1048 if (status != -ENOENT) 1049 command_info->command_finished = WHITEHEAT_CMD_FAILURE; 1050 wake_up(&command_info->wait_command); 1051 return; 1052 } 1053 1054 usb_serial_debug_data(debug, &command_port->dev, 1055 __func__, urb->actual_length, data); 1056 1057 if (data[0] == WHITEHEAT_CMD_COMPLETE) { 1058 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 1059 wake_up(&command_info->wait_command); 1060 } else if (data[0] == WHITEHEAT_CMD_FAILURE) { 1061 command_info->command_finished = WHITEHEAT_CMD_FAILURE; 1062 wake_up(&command_info->wait_command); 1063 } else if (data[0] == WHITEHEAT_EVENT) { 1064 /* These are unsolicited reports from the firmware, hence no 1065 waiting command to wakeup */ 1066 dbg("%s - event received", __func__); 1067 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) { 1068 memcpy(command_info->result_buffer, &data[1], 1069 urb->actual_length - 1); 1070 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 1071 wake_up(&command_info->wait_command); 1072 } else 1073 dbg("%s - bad reply from firmware", __func__); 1074 1075 /* Continue trying to always read */ 1076 command_port->read_urb->dev = command_port->serial->dev; 1077 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC); 1078 if (result) 1079 dbg("%s - failed resubmitting read urb, error %d", 1080 __func__, result); 1081 } 1082 1083 1084 static void whiteheat_read_callback(struct urb *urb) 1085 { 1086 struct usb_serial_port *port = urb->context; 1087 struct whiteheat_urb_wrap *wrap; 1088 unsigned char *data = urb->transfer_buffer; 1089 struct whiteheat_private *info = usb_get_serial_port_data(port); 1090 int status = urb->status; 1091 1092 dbg("%s - port %d", __func__, port->number); 1093 1094 spin_lock(&info->lock); 1095 wrap = urb_to_wrap(urb, &info->rx_urbs_submitted); 1096 if (!wrap) { 1097 spin_unlock(&info->lock); 1098 dev_err(&port->dev, "%s - Not my urb!\n", __func__); 1099 return; 1100 } 1101 list_del(&wrap->list); 1102 spin_unlock(&info->lock); 1103 1104 if (status) { 1105 dbg("%s - nonzero read bulk status received: %d", 1106 __func__, status); 1107 spin_lock(&info->lock); 1108 list_add(&wrap->list, &info->rx_urbs_free); 1109 spin_unlock(&info->lock); 1110 return; 1111 } 1112 1113 usb_serial_debug_data(debug, &port->dev, 1114 __func__, urb->actual_length, data); 1115 1116 spin_lock(&info->lock); 1117 list_add_tail(&wrap->list, &info->rx_urb_q); 1118 if (info->flags & THROTTLED) { 1119 info->flags |= ACTUALLY_THROTTLED; 1120 spin_unlock(&info->lock); 1121 return; 1122 } 1123 spin_unlock(&info->lock); 1124 1125 schedule_work(&info->rx_work); 1126 } 1127 1128 1129 static void whiteheat_write_callback(struct urb *urb) 1130 { 1131 struct usb_serial_port *port = urb->context; 1132 struct whiteheat_private *info = usb_get_serial_port_data(port); 1133 struct whiteheat_urb_wrap *wrap; 1134 int status = urb->status; 1135 1136 dbg("%s - port %d", __func__, port->number); 1137 1138 spin_lock(&info->lock); 1139 wrap = urb_to_wrap(urb, &info->tx_urbs_submitted); 1140 if (!wrap) { 1141 spin_unlock(&info->lock); 1142 dev_err(&port->dev, "%s - Not my urb!\n", __func__); 1143 return; 1144 } 1145 list_move(&wrap->list, &info->tx_urbs_free); 1146 spin_unlock(&info->lock); 1147 1148 if (status) { 1149 dbg("%s - nonzero write bulk status received: %d", 1150 __func__, status); 1151 return; 1152 } 1153 1154 usb_serial_port_softint(port); 1155 } 1156 1157 1158 /***************************************************************************** 1159 * Connect Tech's White Heat firmware interface 1160 *****************************************************************************/ 1161 static int firm_send_command(struct usb_serial_port *port, __u8 command, 1162 __u8 *data, __u8 datasize) 1163 { 1164 struct usb_serial_port *command_port; 1165 struct whiteheat_command_private *command_info; 1166 struct whiteheat_private *info; 1167 __u8 *transfer_buffer; 1168 int retval = 0; 1169 int t; 1170 1171 dbg("%s - command %d", __func__, command); 1172 1173 command_port = port->serial->port[COMMAND_PORT]; 1174 command_info = usb_get_serial_port_data(command_port); 1175 mutex_lock(&command_info->mutex); 1176 command_info->command_finished = false; 1177 1178 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer; 1179 transfer_buffer[0] = command; 1180 memcpy(&transfer_buffer[1], data, datasize); 1181 command_port->write_urb->transfer_buffer_length = datasize + 1; 1182 command_port->write_urb->dev = port->serial->dev; 1183 retval = usb_submit_urb(command_port->write_urb, GFP_NOIO); 1184 if (retval) { 1185 dbg("%s - submit urb failed", __func__); 1186 goto exit; 1187 } 1188 1189 /* wait for the command to complete */ 1190 t = wait_event_timeout(command_info->wait_command, 1191 (bool)command_info->command_finished, COMMAND_TIMEOUT); 1192 if (!t) 1193 usb_kill_urb(command_port->write_urb); 1194 1195 if (command_info->command_finished == false) { 1196 dbg("%s - command timed out.", __func__); 1197 retval = -ETIMEDOUT; 1198 goto exit; 1199 } 1200 1201 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) { 1202 dbg("%s - command failed.", __func__); 1203 retval = -EIO; 1204 goto exit; 1205 } 1206 1207 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) { 1208 dbg("%s - command completed.", __func__); 1209 switch (command) { 1210 case WHITEHEAT_GET_DTR_RTS: 1211 info = usb_get_serial_port_data(port); 1212 memcpy(&info->mcr, command_info->result_buffer, 1213 sizeof(struct whiteheat_dr_info)); 1214 break; 1215 } 1216 } 1217 exit: 1218 mutex_unlock(&command_info->mutex); 1219 return retval; 1220 } 1221 1222 1223 static int firm_open(struct usb_serial_port *port) 1224 { 1225 struct whiteheat_simple open_command; 1226 1227 open_command.port = port->number - port->serial->minor + 1; 1228 return firm_send_command(port, WHITEHEAT_OPEN, 1229 (__u8 *)&open_command, sizeof(open_command)); 1230 } 1231 1232 1233 static int firm_close(struct usb_serial_port *port) 1234 { 1235 struct whiteheat_simple close_command; 1236 1237 close_command.port = port->number - port->serial->minor + 1; 1238 return firm_send_command(port, WHITEHEAT_CLOSE, 1239 (__u8 *)&close_command, sizeof(close_command)); 1240 } 1241 1242 1243 static int firm_setup_port(struct tty_struct *tty) 1244 { 1245 struct usb_serial_port *port = tty->driver_data; 1246 struct whiteheat_port_settings port_settings; 1247 unsigned int cflag = tty->termios->c_cflag; 1248 1249 port_settings.port = port->number + 1; 1250 1251 /* get the byte size */ 1252 switch (cflag & CSIZE) { 1253 case CS5: port_settings.bits = 5; break; 1254 case CS6: port_settings.bits = 6; break; 1255 case CS7: port_settings.bits = 7; break; 1256 default: 1257 case CS8: port_settings.bits = 8; break; 1258 } 1259 dbg("%s - data bits = %d", __func__, port_settings.bits); 1260 1261 /* determine the parity */ 1262 if (cflag & PARENB) 1263 if (cflag & CMSPAR) 1264 if (cflag & PARODD) 1265 port_settings.parity = WHITEHEAT_PAR_MARK; 1266 else 1267 port_settings.parity = WHITEHEAT_PAR_SPACE; 1268 else 1269 if (cflag & PARODD) 1270 port_settings.parity = WHITEHEAT_PAR_ODD; 1271 else 1272 port_settings.parity = WHITEHEAT_PAR_EVEN; 1273 else 1274 port_settings.parity = WHITEHEAT_PAR_NONE; 1275 dbg("%s - parity = %c", __func__, port_settings.parity); 1276 1277 /* figure out the stop bits requested */ 1278 if (cflag & CSTOPB) 1279 port_settings.stop = 2; 1280 else 1281 port_settings.stop = 1; 1282 dbg("%s - stop bits = %d", __func__, port_settings.stop); 1283 1284 /* figure out the flow control settings */ 1285 if (cflag & CRTSCTS) 1286 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | 1287 WHITEHEAT_HFLOW_RTS); 1288 else 1289 port_settings.hflow = WHITEHEAT_HFLOW_NONE; 1290 dbg("%s - hardware flow control = %s %s %s %s", __func__, 1291 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "", 1292 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "", 1293 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "", 1294 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : ""); 1295 1296 /* determine software flow control */ 1297 if (I_IXOFF(tty)) 1298 port_settings.sflow = WHITEHEAT_SFLOW_RXTX; 1299 else 1300 port_settings.sflow = WHITEHEAT_SFLOW_NONE; 1301 dbg("%s - software flow control = %c", __func__, port_settings.sflow); 1302 1303 port_settings.xon = START_CHAR(tty); 1304 port_settings.xoff = STOP_CHAR(tty); 1305 dbg("%s - XON = %2x, XOFF = %2x", 1306 __func__, port_settings.xon, port_settings.xoff); 1307 1308 /* get the baud rate wanted */ 1309 port_settings.baud = tty_get_baud_rate(tty); 1310 dbg("%s - baud rate = %d", __func__, port_settings.baud); 1311 1312 /* fixme: should set validated settings */ 1313 tty_encode_baud_rate(tty, port_settings.baud, port_settings.baud); 1314 /* handle any settings that aren't specified in the tty structure */ 1315 port_settings.lloop = 0; 1316 1317 /* now send the message to the device */ 1318 return firm_send_command(port, WHITEHEAT_SETUP_PORT, 1319 (__u8 *)&port_settings, sizeof(port_settings)); 1320 } 1321 1322 1323 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) 1324 { 1325 struct whiteheat_set_rdb rts_command; 1326 1327 rts_command.port = port->number - port->serial->minor + 1; 1328 rts_command.state = onoff; 1329 return firm_send_command(port, WHITEHEAT_SET_RTS, 1330 (__u8 *)&rts_command, sizeof(rts_command)); 1331 } 1332 1333 1334 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) 1335 { 1336 struct whiteheat_set_rdb dtr_command; 1337 1338 dtr_command.port = port->number - port->serial->minor + 1; 1339 dtr_command.state = onoff; 1340 return firm_send_command(port, WHITEHEAT_SET_DTR, 1341 (__u8 *)&dtr_command, sizeof(dtr_command)); 1342 } 1343 1344 1345 static int firm_set_break(struct usb_serial_port *port, __u8 onoff) 1346 { 1347 struct whiteheat_set_rdb break_command; 1348 1349 break_command.port = port->number - port->serial->minor + 1; 1350 break_command.state = onoff; 1351 return firm_send_command(port, WHITEHEAT_SET_BREAK, 1352 (__u8 *)&break_command, sizeof(break_command)); 1353 } 1354 1355 1356 static int firm_purge(struct usb_serial_port *port, __u8 rxtx) 1357 { 1358 struct whiteheat_purge purge_command; 1359 1360 purge_command.port = port->number - port->serial->minor + 1; 1361 purge_command.what = rxtx; 1362 return firm_send_command(port, WHITEHEAT_PURGE, 1363 (__u8 *)&purge_command, sizeof(purge_command)); 1364 } 1365 1366 1367 static int firm_get_dtr_rts(struct usb_serial_port *port) 1368 { 1369 struct whiteheat_simple get_dr_command; 1370 1371 get_dr_command.port = port->number - port->serial->minor + 1; 1372 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, 1373 (__u8 *)&get_dr_command, sizeof(get_dr_command)); 1374 } 1375 1376 1377 static int firm_report_tx_done(struct usb_serial_port *port) 1378 { 1379 struct whiteheat_simple close_command; 1380 1381 close_command.port = port->number - port->serial->minor + 1; 1382 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, 1383 (__u8 *)&close_command, sizeof(close_command)); 1384 } 1385 1386 1387 /***************************************************************************** 1388 * Connect Tech's White Heat utility functions 1389 *****************************************************************************/ 1390 static int start_command_port(struct usb_serial *serial) 1391 { 1392 struct usb_serial_port *command_port; 1393 struct whiteheat_command_private *command_info; 1394 int retval = 0; 1395 1396 command_port = serial->port[COMMAND_PORT]; 1397 command_info = usb_get_serial_port_data(command_port); 1398 mutex_lock(&command_info->mutex); 1399 if (!command_info->port_running) { 1400 /* Work around HCD bugs */ 1401 usb_clear_halt(serial->dev, command_port->read_urb->pipe); 1402 1403 command_port->read_urb->dev = serial->dev; 1404 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL); 1405 if (retval) { 1406 dev_err(&serial->dev->dev, 1407 "%s - failed submitting read urb, error %d\n", 1408 __func__, retval); 1409 goto exit; 1410 } 1411 } 1412 command_info->port_running++; 1413 1414 exit: 1415 mutex_unlock(&command_info->mutex); 1416 return retval; 1417 } 1418 1419 1420 static void stop_command_port(struct usb_serial *serial) 1421 { 1422 struct usb_serial_port *command_port; 1423 struct whiteheat_command_private *command_info; 1424 1425 command_port = serial->port[COMMAND_PORT]; 1426 command_info = usb_get_serial_port_data(command_port); 1427 mutex_lock(&command_info->mutex); 1428 command_info->port_running--; 1429 if (!command_info->port_running) 1430 usb_kill_urb(command_port->read_urb); 1431 mutex_unlock(&command_info->mutex); 1432 } 1433 1434 1435 static int start_port_read(struct usb_serial_port *port) 1436 { 1437 struct whiteheat_private *info = usb_get_serial_port_data(port); 1438 struct whiteheat_urb_wrap *wrap; 1439 struct urb *urb; 1440 int retval = 0; 1441 unsigned long flags; 1442 struct list_head *tmp; 1443 struct list_head *tmp2; 1444 1445 spin_lock_irqsave(&info->lock, flags); 1446 1447 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 1448 list_del(tmp); 1449 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1450 urb = wrap->urb; 1451 urb->dev = port->serial->dev; 1452 spin_unlock_irqrestore(&info->lock, flags); 1453 retval = usb_submit_urb(urb, GFP_KERNEL); 1454 if (retval) { 1455 spin_lock_irqsave(&info->lock, flags); 1456 list_add(tmp, &info->rx_urbs_free); 1457 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 1458 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1459 urb = wrap->urb; 1460 list_del(tmp); 1461 spin_unlock_irqrestore(&info->lock, flags); 1462 usb_kill_urb(urb); 1463 spin_lock_irqsave(&info->lock, flags); 1464 list_add(tmp, &info->rx_urbs_free); 1465 } 1466 break; 1467 } 1468 spin_lock_irqsave(&info->lock, flags); 1469 list_add(tmp, &info->rx_urbs_submitted); 1470 } 1471 1472 spin_unlock_irqrestore(&info->lock, flags); 1473 1474 return retval; 1475 } 1476 1477 1478 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, 1479 struct list_head *head) 1480 { 1481 struct whiteheat_urb_wrap *wrap; 1482 struct list_head *tmp; 1483 1484 list_for_each(tmp, head) { 1485 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1486 if (wrap->urb == urb) 1487 return wrap; 1488 } 1489 1490 return NULL; 1491 } 1492 1493 1494 static struct list_head *list_first(struct list_head *head) 1495 { 1496 return head->next; 1497 } 1498 1499 1500 static void rx_data_softint(struct work_struct *work) 1501 { 1502 struct whiteheat_private *info = 1503 container_of(work, struct whiteheat_private, rx_work); 1504 struct usb_serial_port *port = info->port; 1505 struct tty_struct *tty = tty_port_tty_get(&port->port); 1506 struct whiteheat_urb_wrap *wrap; 1507 struct urb *urb; 1508 unsigned long flags; 1509 struct list_head *tmp; 1510 struct list_head *tmp2; 1511 int result; 1512 int sent = 0; 1513 1514 spin_lock_irqsave(&info->lock, flags); 1515 if (info->flags & THROTTLED) { 1516 spin_unlock_irqrestore(&info->lock, flags); 1517 goto out; 1518 } 1519 1520 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) { 1521 list_del(tmp); 1522 spin_unlock_irqrestore(&info->lock, flags); 1523 1524 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1525 urb = wrap->urb; 1526 1527 if (tty && urb->actual_length) { 1528 int len = tty_buffer_request_room(tty, 1529 urb->actual_length); 1530 /* This stuff can go away now I suspect */ 1531 if (unlikely(len < urb->actual_length)) { 1532 spin_lock_irqsave(&info->lock, flags); 1533 list_add(tmp, &info->rx_urb_q); 1534 spin_unlock_irqrestore(&info->lock, flags); 1535 tty_flip_buffer_push(tty); 1536 schedule_work(&info->rx_work); 1537 goto out; 1538 } 1539 tty_insert_flip_string(tty, urb->transfer_buffer, len); 1540 sent += len; 1541 } 1542 1543 urb->dev = port->serial->dev; 1544 result = usb_submit_urb(urb, GFP_ATOMIC); 1545 if (result) { 1546 dev_err(&port->dev, 1547 "%s - failed resubmitting read urb, error %d\n", 1548 __func__, result); 1549 spin_lock_irqsave(&info->lock, flags); 1550 list_add(tmp, &info->rx_urbs_free); 1551 continue; 1552 } 1553 1554 spin_lock_irqsave(&info->lock, flags); 1555 list_add(tmp, &info->rx_urbs_submitted); 1556 } 1557 spin_unlock_irqrestore(&info->lock, flags); 1558 1559 if (sent) 1560 tty_flip_buffer_push(tty); 1561 out: 1562 tty_kref_put(tty); 1563 } 1564 1565 1566 /***************************************************************************** 1567 * Connect Tech's White Heat module functions 1568 *****************************************************************************/ 1569 static int __init whiteheat_init(void) 1570 { 1571 int retval; 1572 retval = usb_serial_register(&whiteheat_fake_device); 1573 if (retval) 1574 goto failed_fake_register; 1575 retval = usb_serial_register(&whiteheat_device); 1576 if (retval) 1577 goto failed_device_register; 1578 retval = usb_register(&whiteheat_driver); 1579 if (retval) 1580 goto failed_usb_register; 1581 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 1582 DRIVER_DESC "\n"); 1583 return 0; 1584 failed_usb_register: 1585 usb_serial_deregister(&whiteheat_device); 1586 failed_device_register: 1587 usb_serial_deregister(&whiteheat_fake_device); 1588 failed_fake_register: 1589 return retval; 1590 } 1591 1592 1593 static void __exit whiteheat_exit(void) 1594 { 1595 usb_deregister(&whiteheat_driver); 1596 usb_serial_deregister(&whiteheat_fake_device); 1597 usb_serial_deregister(&whiteheat_device); 1598 } 1599 1600 1601 module_init(whiteheat_init); 1602 module_exit(whiteheat_exit); 1603 1604 MODULE_AUTHOR(DRIVER_AUTHOR); 1605 MODULE_DESCRIPTION(DRIVER_DESC); 1606 MODULE_LICENSE("GPL"); 1607 1608 MODULE_FIRMWARE("whiteheat.fw"); 1609 MODULE_FIRMWARE("whiteheat_loader.fw"); 1610 1611 module_param(urb_pool_size, int, 0); 1612 MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering"); 1613 1614 module_param(debug, bool, S_IRUGO | S_IWUSR); 1615 MODULE_PARM_DESC(debug, "Debug enabled or not"); 1616