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