1 /****************************************************************************** 2 * speedtch.c - Alcatel SpeedTouch USB xDSL modem driver 3 * 4 * Copyright (C) 2001, Alcatel 5 * Copyright (C) 2003, Duncan Sands 6 * Copyright (C) 2004, David Woodhouse 7 * 8 * Based on "modem_run.c", copyright (C) 2001, Benoit Papillault 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published by the Free 12 * Software Foundation; either version 2 of the License, or (at your option) 13 * any later version. 14 * 15 * This program is distributed in the hope that it will be useful, but WITHOUT 16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 18 * more details. 19 * 20 * You should have received a copy of the GNU General Public License along with 21 * this program; if not, write to the Free Software Foundation, Inc., 59 22 * Temple Place - Suite 330, Boston, MA 02111-1307, USA. 23 * 24 ******************************************************************************/ 25 26 #include <asm/page.h> 27 #include <linux/device.h> 28 #include <linux/errno.h> 29 #include <linux/firmware.h> 30 #include <linux/kernel.h> 31 #include <linux/module.h> 32 #include <linux/moduleparam.h> 33 #include <linux/slab.h> 34 #include <linux/stat.h> 35 #include <linux/timer.h> 36 #include <linux/types.h> 37 #include <linux/usb/ch9.h> 38 #include <linux/workqueue.h> 39 40 #include "usbatm.h" 41 42 #define DRIVER_AUTHOR "Johan Verrept, Duncan Sands <duncan.sands@free.fr>" 43 #define DRIVER_DESC "Alcatel SpeedTouch USB driver" 44 45 static const char speedtch_driver_name[] = "speedtch"; 46 47 #define CTRL_TIMEOUT 2000 /* milliseconds */ 48 #define DATA_TIMEOUT 2000 /* milliseconds */ 49 50 #define OFFSET_7 0 /* size 1 */ 51 #define OFFSET_b 1 /* size 8 */ 52 #define OFFSET_d 9 /* size 4 */ 53 #define OFFSET_e 13 /* size 1 */ 54 #define OFFSET_f 14 /* size 1 */ 55 56 #define SIZE_7 1 57 #define SIZE_b 8 58 #define SIZE_d 4 59 #define SIZE_e 1 60 #define SIZE_f 1 61 62 #define MIN_POLL_DELAY 5000 /* milliseconds */ 63 #define MAX_POLL_DELAY 60000 /* milliseconds */ 64 65 #define RESUBMIT_DELAY 1000 /* milliseconds */ 66 67 #define DEFAULT_BULK_ALTSETTING 1 68 #define DEFAULT_ISOC_ALTSETTING 3 69 #define DEFAULT_DL_512_FIRST 0 70 #define DEFAULT_ENABLE_ISOC 0 71 #define DEFAULT_SW_BUFFERING 0 72 73 static unsigned int altsetting = 0; /* zero means: use the default */ 74 static bool dl_512_first = DEFAULT_DL_512_FIRST; 75 static bool enable_isoc = DEFAULT_ENABLE_ISOC; 76 static bool sw_buffering = DEFAULT_SW_BUFFERING; 77 78 #define DEFAULT_B_MAX_DSL 8128 79 #define DEFAULT_MODEM_MODE 11 80 #define MODEM_OPTION_LENGTH 16 81 static const unsigned char DEFAULT_MODEM_OPTION[MODEM_OPTION_LENGTH] = { 82 0x10, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 83 }; 84 85 static unsigned int BMaxDSL = DEFAULT_B_MAX_DSL; 86 static unsigned char ModemMode = DEFAULT_MODEM_MODE; 87 static unsigned char ModemOption[MODEM_OPTION_LENGTH]; 88 static unsigned int num_ModemOption; 89 90 module_param(altsetting, uint, S_IRUGO | S_IWUSR); 91 MODULE_PARM_DESC(altsetting, 92 "Alternative setting for data interface (bulk_default: " 93 __MODULE_STRING(DEFAULT_BULK_ALTSETTING) "; isoc_default: " 94 __MODULE_STRING(DEFAULT_ISOC_ALTSETTING) ")"); 95 96 module_param(dl_512_first, bool, S_IRUGO | S_IWUSR); 97 MODULE_PARM_DESC(dl_512_first, 98 "Read 512 bytes before sending firmware (default: " 99 __MODULE_STRING(DEFAULT_DL_512_FIRST) ")"); 100 101 module_param(enable_isoc, bool, S_IRUGO | S_IWUSR); 102 MODULE_PARM_DESC(enable_isoc, 103 "Use isochronous transfers if available (default: " 104 __MODULE_STRING(DEFAULT_ENABLE_ISOC) ")"); 105 106 module_param(sw_buffering, bool, S_IRUGO | S_IWUSR); 107 MODULE_PARM_DESC(sw_buffering, 108 "Enable software buffering (default: " 109 __MODULE_STRING(DEFAULT_SW_BUFFERING) ")"); 110 111 module_param(BMaxDSL, uint, S_IRUGO | S_IWUSR); 112 MODULE_PARM_DESC(BMaxDSL, 113 "default: " __MODULE_STRING(DEFAULT_B_MAX_DSL)); 114 115 module_param(ModemMode, byte, S_IRUGO | S_IWUSR); 116 MODULE_PARM_DESC(ModemMode, 117 "default: " __MODULE_STRING(DEFAULT_MODEM_MODE)); 118 119 module_param_array(ModemOption, byte, &num_ModemOption, S_IRUGO); 120 MODULE_PARM_DESC(ModemOption, "default: 0x10,0x00,0x00,0x00,0x20"); 121 122 #define INTERFACE_DATA 1 123 #define ENDPOINT_INT 0x81 124 #define ENDPOINT_BULK_DATA 0x07 125 #define ENDPOINT_ISOC_DATA 0x07 126 #define ENDPOINT_FIRMWARE 0x05 127 128 struct speedtch_params { 129 unsigned int altsetting; 130 unsigned int BMaxDSL; 131 unsigned char ModemMode; 132 unsigned char ModemOption[MODEM_OPTION_LENGTH]; 133 }; 134 135 struct speedtch_instance_data { 136 struct usbatm_data *usbatm; 137 138 struct speedtch_params params; /* set in probe, constant afterwards */ 139 140 struct timer_list status_check_timer; 141 struct work_struct status_check_work; 142 143 unsigned char last_status; 144 145 int poll_delay; /* milliseconds */ 146 147 struct timer_list resubmit_timer; 148 struct urb *int_urb; 149 unsigned char int_data[16]; 150 151 unsigned char scratch_buffer[16]; 152 }; 153 154 /*************** 155 ** firmware ** 156 ***************/ 157 158 static void speedtch_set_swbuff(struct speedtch_instance_data *instance, int state) 159 { 160 struct usbatm_data *usbatm = instance->usbatm; 161 struct usb_device *usb_dev = usbatm->usb_dev; 162 int ret; 163 164 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 165 0x32, 0x40, state ? 0x01 : 0x00, 0x00, NULL, 0, CTRL_TIMEOUT); 166 if (ret < 0) 167 usb_warn(usbatm, 168 "%sabling SW buffering: usb_control_msg returned %d\n", 169 state ? "En" : "Dis", ret); 170 else 171 usb_dbg(usbatm, "speedtch_set_swbuff: %sbled SW buffering\n", state ? "En" : "Dis"); 172 } 173 174 static void speedtch_test_sequence(struct speedtch_instance_data *instance) 175 { 176 struct usbatm_data *usbatm = instance->usbatm; 177 struct usb_device *usb_dev = usbatm->usb_dev; 178 unsigned char *buf = instance->scratch_buffer; 179 int ret; 180 181 /* URB 147 */ 182 buf[0] = 0x1c; 183 buf[1] = 0x50; 184 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 185 0x01, 0x40, 0x0b, 0x00, buf, 2, CTRL_TIMEOUT); 186 if (ret < 0) 187 usb_warn(usbatm, "%s failed on URB147: %d\n", __func__, ret); 188 189 /* URB 148 */ 190 buf[0] = 0x32; 191 buf[1] = 0x00; 192 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 193 0x01, 0x40, 0x02, 0x00, buf, 2, CTRL_TIMEOUT); 194 if (ret < 0) 195 usb_warn(usbatm, "%s failed on URB148: %d\n", __func__, ret); 196 197 /* URB 149 */ 198 buf[0] = 0x01; 199 buf[1] = 0x00; 200 buf[2] = 0x01; 201 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 202 0x01, 0x40, 0x03, 0x00, buf, 3, CTRL_TIMEOUT); 203 if (ret < 0) 204 usb_warn(usbatm, "%s failed on URB149: %d\n", __func__, ret); 205 206 /* URB 150 */ 207 buf[0] = 0x01; 208 buf[1] = 0x00; 209 buf[2] = 0x01; 210 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 211 0x01, 0x40, 0x04, 0x00, buf, 3, CTRL_TIMEOUT); 212 if (ret < 0) 213 usb_warn(usbatm, "%s failed on URB150: %d\n", __func__, ret); 214 215 /* Extra initialisation in recent drivers - gives higher speeds */ 216 217 /* URBext1 */ 218 buf[0] = instance->params.ModemMode; 219 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 220 0x01, 0x40, 0x11, 0x00, buf, 1, CTRL_TIMEOUT); 221 if (ret < 0) 222 usb_warn(usbatm, "%s failed on URBext1: %d\n", __func__, ret); 223 224 /* URBext2 */ 225 /* This seems to be the one which actually triggers the higher sync 226 rate -- it does require the new firmware too, although it works OK 227 with older firmware */ 228 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 229 0x01, 0x40, 0x14, 0x00, 230 instance->params.ModemOption, 231 MODEM_OPTION_LENGTH, CTRL_TIMEOUT); 232 if (ret < 0) 233 usb_warn(usbatm, "%s failed on URBext2: %d\n", __func__, ret); 234 235 /* URBext3 */ 236 buf[0] = instance->params.BMaxDSL & 0xff; 237 buf[1] = instance->params.BMaxDSL >> 8; 238 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 239 0x01, 0x40, 0x12, 0x00, buf, 2, CTRL_TIMEOUT); 240 if (ret < 0) 241 usb_warn(usbatm, "%s failed on URBext3: %d\n", __func__, ret); 242 } 243 244 static int speedtch_upload_firmware(struct speedtch_instance_data *instance, 245 const struct firmware *fw1, 246 const struct firmware *fw2) 247 { 248 unsigned char *buffer; 249 struct usbatm_data *usbatm = instance->usbatm; 250 struct usb_device *usb_dev = usbatm->usb_dev; 251 int actual_length; 252 int ret = 0; 253 int offset; 254 255 usb_dbg(usbatm, "%s entered\n", __func__); 256 257 buffer = (unsigned char *)__get_free_page(GFP_KERNEL); 258 if (!buffer) { 259 ret = -ENOMEM; 260 usb_dbg(usbatm, "%s: no memory for buffer!\n", __func__); 261 goto out; 262 } 263 264 if (!usb_ifnum_to_if(usb_dev, 2)) { 265 ret = -ENODEV; 266 usb_dbg(usbatm, "%s: interface not found!\n", __func__); 267 goto out_free; 268 } 269 270 /* URB 7 */ 271 if (dl_512_first) { /* some modems need a read before writing the firmware */ 272 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE), 273 buffer, 0x200, &actual_length, 2000); 274 275 if (ret < 0 && ret != -ETIMEDOUT) 276 usb_warn(usbatm, "%s: read BLOCK0 from modem failed (%d)!\n", __func__, ret); 277 else 278 usb_dbg(usbatm, "%s: BLOCK0 downloaded (%d bytes)\n", __func__, ret); 279 } 280 281 /* URB 8 : both leds are static green */ 282 for (offset = 0; offset < fw1->size; offset += PAGE_SIZE) { 283 int thislen = min_t(int, PAGE_SIZE, fw1->size - offset); 284 memcpy(buffer, fw1->data + offset, thislen); 285 286 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, ENDPOINT_FIRMWARE), 287 buffer, thislen, &actual_length, DATA_TIMEOUT); 288 289 if (ret < 0) { 290 usb_err(usbatm, "%s: write BLOCK1 to modem failed (%d)!\n", __func__, ret); 291 goto out_free; 292 } 293 usb_dbg(usbatm, "%s: BLOCK1 uploaded (%zu bytes)\n", __func__, fw1->size); 294 } 295 296 /* USB led blinking green, ADSL led off */ 297 298 /* URB 11 */ 299 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE), 300 buffer, 0x200, &actual_length, DATA_TIMEOUT); 301 302 if (ret < 0) { 303 usb_err(usbatm, "%s: read BLOCK2 from modem failed (%d)!\n", __func__, ret); 304 goto out_free; 305 } 306 usb_dbg(usbatm, "%s: BLOCK2 downloaded (%d bytes)\n", __func__, actual_length); 307 308 /* URBs 12 to 139 - USB led blinking green, ADSL led off */ 309 for (offset = 0; offset < fw2->size; offset += PAGE_SIZE) { 310 int thislen = min_t(int, PAGE_SIZE, fw2->size - offset); 311 memcpy(buffer, fw2->data + offset, thislen); 312 313 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, ENDPOINT_FIRMWARE), 314 buffer, thislen, &actual_length, DATA_TIMEOUT); 315 316 if (ret < 0) { 317 usb_err(usbatm, "%s: write BLOCK3 to modem failed (%d)!\n", __func__, ret); 318 goto out_free; 319 } 320 } 321 usb_dbg(usbatm, "%s: BLOCK3 uploaded (%zu bytes)\n", __func__, fw2->size); 322 323 /* USB led static green, ADSL led static red */ 324 325 /* URB 142 */ 326 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE), 327 buffer, 0x200, &actual_length, DATA_TIMEOUT); 328 329 if (ret < 0) { 330 usb_err(usbatm, "%s: read BLOCK4 from modem failed (%d)!\n", __func__, ret); 331 goto out_free; 332 } 333 334 /* success */ 335 usb_dbg(usbatm, "%s: BLOCK4 downloaded (%d bytes)\n", __func__, actual_length); 336 337 /* Delay to allow firmware to start up. We can do this here 338 because we're in our own kernel thread anyway. */ 339 msleep_interruptible(1000); 340 341 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, instance->params.altsetting)) < 0) { 342 usb_err(usbatm, "%s: setting interface to %d failed (%d)!\n", __func__, instance->params.altsetting, ret); 343 goto out_free; 344 } 345 346 /* Enable software buffering, if requested */ 347 if (sw_buffering) 348 speedtch_set_swbuff(instance, 1); 349 350 /* Magic spell; don't ask us what this does */ 351 speedtch_test_sequence(instance); 352 353 ret = 0; 354 355 out_free: 356 free_page((unsigned long)buffer); 357 out: 358 return ret; 359 } 360 361 static int speedtch_find_firmware(struct usbatm_data *usbatm, struct usb_interface *intf, 362 int phase, const struct firmware **fw_p) 363 { 364 struct device *dev = &intf->dev; 365 const u16 bcdDevice = le16_to_cpu(interface_to_usbdev(intf)->descriptor.bcdDevice); 366 const u8 major_revision = bcdDevice >> 8; 367 const u8 minor_revision = bcdDevice & 0xff; 368 char buf[24]; 369 370 sprintf(buf, "speedtch-%d.bin.%x.%02x", phase, major_revision, minor_revision); 371 usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf); 372 373 if (request_firmware(fw_p, buf, dev)) { 374 sprintf(buf, "speedtch-%d.bin.%x", phase, major_revision); 375 usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf); 376 377 if (request_firmware(fw_p, buf, dev)) { 378 sprintf(buf, "speedtch-%d.bin", phase); 379 usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf); 380 381 if (request_firmware(fw_p, buf, dev)) { 382 usb_err(usbatm, "%s: no stage %d firmware found!\n", __func__, phase); 383 return -ENOENT; 384 } 385 } 386 } 387 388 usb_info(usbatm, "found stage %d firmware %s\n", phase, buf); 389 390 return 0; 391 } 392 393 static int speedtch_heavy_init(struct usbatm_data *usbatm, struct usb_interface *intf) 394 { 395 const struct firmware *fw1, *fw2; 396 struct speedtch_instance_data *instance = usbatm->driver_data; 397 int ret; 398 399 if ((ret = speedtch_find_firmware(usbatm, intf, 1, &fw1)) < 0) 400 return ret; 401 402 if ((ret = speedtch_find_firmware(usbatm, intf, 2, &fw2)) < 0) { 403 release_firmware(fw1); 404 return ret; 405 } 406 407 if ((ret = speedtch_upload_firmware(instance, fw1, fw2)) < 0) 408 usb_err(usbatm, "%s: firmware upload failed (%d)!\n", __func__, ret); 409 410 release_firmware(fw2); 411 release_firmware(fw1); 412 413 return ret; 414 } 415 416 417 /********** 418 ** ATM ** 419 **********/ 420 421 static int speedtch_read_status(struct speedtch_instance_data *instance) 422 { 423 struct usbatm_data *usbatm = instance->usbatm; 424 struct usb_device *usb_dev = usbatm->usb_dev; 425 unsigned char *buf = instance->scratch_buffer; 426 int ret; 427 428 memset(buf, 0, 16); 429 430 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 431 0x12, 0xc0, 0x07, 0x00, buf + OFFSET_7, SIZE_7, 432 CTRL_TIMEOUT); 433 if (ret < 0) { 434 atm_dbg(usbatm, "%s: MSG 7 failed\n", __func__); 435 return ret; 436 } 437 438 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 439 0x12, 0xc0, 0x0b, 0x00, buf + OFFSET_b, SIZE_b, 440 CTRL_TIMEOUT); 441 if (ret < 0) { 442 atm_dbg(usbatm, "%s: MSG B failed\n", __func__); 443 return ret; 444 } 445 446 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 447 0x12, 0xc0, 0x0d, 0x00, buf + OFFSET_d, SIZE_d, 448 CTRL_TIMEOUT); 449 if (ret < 0) { 450 atm_dbg(usbatm, "%s: MSG D failed\n", __func__); 451 return ret; 452 } 453 454 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 455 0x01, 0xc0, 0x0e, 0x00, buf + OFFSET_e, SIZE_e, 456 CTRL_TIMEOUT); 457 if (ret < 0) { 458 atm_dbg(usbatm, "%s: MSG E failed\n", __func__); 459 return ret; 460 } 461 462 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 463 0x01, 0xc0, 0x0f, 0x00, buf + OFFSET_f, SIZE_f, 464 CTRL_TIMEOUT); 465 if (ret < 0) { 466 atm_dbg(usbatm, "%s: MSG F failed\n", __func__); 467 return ret; 468 } 469 470 return 0; 471 } 472 473 static int speedtch_start_synchro(struct speedtch_instance_data *instance) 474 { 475 struct usbatm_data *usbatm = instance->usbatm; 476 struct usb_device *usb_dev = usbatm->usb_dev; 477 unsigned char *buf = instance->scratch_buffer; 478 int ret; 479 480 atm_dbg(usbatm, "%s entered\n", __func__); 481 482 memset(buf, 0, 2); 483 484 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 485 0x12, 0xc0, 0x04, 0x00, 486 buf, 2, CTRL_TIMEOUT); 487 488 if (ret < 0) 489 atm_warn(usbatm, "failed to start ADSL synchronisation: %d\n", ret); 490 else 491 atm_dbg(usbatm, "%s: modem prodded. %d bytes returned: %02x %02x\n", 492 __func__, ret, buf[0], buf[1]); 493 494 return ret; 495 } 496 497 static void speedtch_check_status(struct work_struct *work) 498 { 499 struct speedtch_instance_data *instance = 500 container_of(work, struct speedtch_instance_data, 501 status_check_work); 502 struct usbatm_data *usbatm = instance->usbatm; 503 struct atm_dev *atm_dev = usbatm->atm_dev; 504 unsigned char *buf = instance->scratch_buffer; 505 int down_speed, up_speed, ret; 506 unsigned char status; 507 508 #ifdef VERBOSE_DEBUG 509 atm_dbg(usbatm, "%s entered\n", __func__); 510 #endif 511 512 ret = speedtch_read_status(instance); 513 if (ret < 0) { 514 atm_warn(usbatm, "error %d fetching device status\n", ret); 515 instance->poll_delay = min(2 * instance->poll_delay, MAX_POLL_DELAY); 516 return; 517 } 518 519 instance->poll_delay = max(instance->poll_delay / 2, MIN_POLL_DELAY); 520 521 status = buf[OFFSET_7]; 522 523 if ((status != instance->last_status) || !status) { 524 atm_dbg(usbatm, "%s: line state 0x%02x\n", __func__, status); 525 526 switch (status) { 527 case 0: 528 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST); 529 if (instance->last_status) 530 atm_info(usbatm, "ADSL line is down\n"); 531 /* It may never resync again unless we ask it to... */ 532 ret = speedtch_start_synchro(instance); 533 break; 534 535 case 0x08: 536 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN); 537 atm_info(usbatm, "ADSL line is blocked?\n"); 538 break; 539 540 case 0x10: 541 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST); 542 atm_info(usbatm, "ADSL line is synchronising\n"); 543 break; 544 545 case 0x20: 546 down_speed = buf[OFFSET_b] | (buf[OFFSET_b + 1] << 8) 547 | (buf[OFFSET_b + 2] << 16) | (buf[OFFSET_b + 3] << 24); 548 up_speed = buf[OFFSET_b + 4] | (buf[OFFSET_b + 5] << 8) 549 | (buf[OFFSET_b + 6] << 16) | (buf[OFFSET_b + 7] << 24); 550 551 if (!(down_speed & 0x0000ffff) && !(up_speed & 0x0000ffff)) { 552 down_speed >>= 16; 553 up_speed >>= 16; 554 } 555 556 atm_dev->link_rate = down_speed * 1000 / 424; 557 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_FOUND); 558 559 atm_info(usbatm, 560 "ADSL line is up (%d kb/s down | %d kb/s up)\n", 561 down_speed, up_speed); 562 break; 563 564 default: 565 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN); 566 atm_info(usbatm, "unknown line state %02x\n", status); 567 break; 568 } 569 570 instance->last_status = status; 571 } 572 } 573 574 static void speedtch_status_poll(unsigned long data) 575 { 576 struct speedtch_instance_data *instance = (void *)data; 577 578 schedule_work(&instance->status_check_work); 579 580 /* The following check is racy, but the race is harmless */ 581 if (instance->poll_delay < MAX_POLL_DELAY) 582 mod_timer(&instance->status_check_timer, jiffies + msecs_to_jiffies(instance->poll_delay)); 583 else 584 atm_warn(instance->usbatm, "Too many failures - disabling line status polling\n"); 585 } 586 587 static void speedtch_resubmit_int(unsigned long data) 588 { 589 struct speedtch_instance_data *instance = (void *)data; 590 struct urb *int_urb = instance->int_urb; 591 int ret; 592 593 atm_dbg(instance->usbatm, "%s entered\n", __func__); 594 595 if (int_urb) { 596 ret = usb_submit_urb(int_urb, GFP_ATOMIC); 597 if (!ret) 598 schedule_work(&instance->status_check_work); 599 else { 600 atm_dbg(instance->usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret); 601 mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY)); 602 } 603 } 604 } 605 606 static void speedtch_handle_int(struct urb *int_urb) 607 { 608 struct speedtch_instance_data *instance = int_urb->context; 609 struct usbatm_data *usbatm = instance->usbatm; 610 unsigned int count = int_urb->actual_length; 611 int status = int_urb->status; 612 int ret; 613 614 /* The magic interrupt for "up state" */ 615 static const unsigned char up_int[6] = { 0xa1, 0x00, 0x01, 0x00, 0x00, 0x00 }; 616 /* The magic interrupt for "down state" */ 617 static const unsigned char down_int[6] = { 0xa1, 0x00, 0x00, 0x00, 0x00, 0x00 }; 618 619 atm_dbg(usbatm, "%s entered\n", __func__); 620 621 if (status < 0) { 622 atm_dbg(usbatm, "%s: nonzero urb status %d!\n", __func__, status); 623 goto fail; 624 } 625 626 if ((count == 6) && !memcmp(up_int, instance->int_data, 6)) { 627 del_timer(&instance->status_check_timer); 628 atm_info(usbatm, "DSL line goes up\n"); 629 } else if ((count == 6) && !memcmp(down_int, instance->int_data, 6)) { 630 atm_info(usbatm, "DSL line goes down\n"); 631 } else { 632 int i; 633 634 atm_dbg(usbatm, "%s: unknown interrupt packet of length %d:", __func__, count); 635 for (i = 0; i < count; i++) 636 printk(" %02x", instance->int_data[i]); 637 printk("\n"); 638 goto fail; 639 } 640 641 int_urb = instance->int_urb; 642 if (int_urb) { 643 ret = usb_submit_urb(int_urb, GFP_ATOMIC); 644 schedule_work(&instance->status_check_work); 645 if (ret < 0) { 646 atm_dbg(usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret); 647 goto fail; 648 } 649 } 650 651 return; 652 653 fail: 654 int_urb = instance->int_urb; 655 if (int_urb) 656 mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY)); 657 } 658 659 static int speedtch_atm_start(struct usbatm_data *usbatm, struct atm_dev *atm_dev) 660 { 661 struct usb_device *usb_dev = usbatm->usb_dev; 662 struct speedtch_instance_data *instance = usbatm->driver_data; 663 int i, ret; 664 unsigned char mac_str[13]; 665 666 atm_dbg(usbatm, "%s entered\n", __func__); 667 668 /* Set MAC address, it is stored in the serial number */ 669 memset(atm_dev->esi, 0, sizeof(atm_dev->esi)); 670 if (usb_string(usb_dev, usb_dev->descriptor.iSerialNumber, mac_str, sizeof(mac_str)) == 12) { 671 for (i = 0; i < 6; i++) 672 atm_dev->esi[i] = (hex_to_bin(mac_str[i * 2]) << 4) + 673 hex_to_bin(mac_str[i * 2 + 1]); 674 } 675 676 /* Start modem synchronisation */ 677 ret = speedtch_start_synchro(instance); 678 679 /* Set up interrupt endpoint */ 680 if (instance->int_urb) { 681 ret = usb_submit_urb(instance->int_urb, GFP_KERNEL); 682 if (ret < 0) { 683 /* Doesn't matter; we'll poll anyway */ 684 atm_dbg(usbatm, "%s: submission of interrupt URB failed (%d)!\n", __func__, ret); 685 usb_free_urb(instance->int_urb); 686 instance->int_urb = NULL; 687 } 688 } 689 690 /* Start status polling */ 691 mod_timer(&instance->status_check_timer, jiffies + msecs_to_jiffies(1000)); 692 693 return 0; 694 } 695 696 static void speedtch_atm_stop(struct usbatm_data *usbatm, struct atm_dev *atm_dev) 697 { 698 struct speedtch_instance_data *instance = usbatm->driver_data; 699 struct urb *int_urb = instance->int_urb; 700 701 atm_dbg(usbatm, "%s entered\n", __func__); 702 703 del_timer_sync(&instance->status_check_timer); 704 705 /* 706 * Since resubmit_timer and int_urb can schedule themselves and 707 * each other, shutting them down correctly takes some care 708 */ 709 instance->int_urb = NULL; /* signal shutdown */ 710 mb(); 711 usb_kill_urb(int_urb); 712 del_timer_sync(&instance->resubmit_timer); 713 /* 714 * At this point, speedtch_handle_int and speedtch_resubmit_int 715 * can run or be running, but instance->int_urb == NULL means that 716 * they will not reschedule 717 */ 718 usb_kill_urb(int_urb); 719 del_timer_sync(&instance->resubmit_timer); 720 usb_free_urb(int_urb); 721 722 flush_work(&instance->status_check_work); 723 } 724 725 static int speedtch_pre_reset(struct usb_interface *intf) 726 { 727 return 0; 728 } 729 730 static int speedtch_post_reset(struct usb_interface *intf) 731 { 732 return 0; 733 } 734 735 736 /********** 737 ** USB ** 738 **********/ 739 740 static const struct usb_device_id speedtch_usb_ids[] = { 741 {USB_DEVICE(0x06b9, 0x4061)}, 742 {} 743 }; 744 745 MODULE_DEVICE_TABLE(usb, speedtch_usb_ids); 746 747 static int speedtch_usb_probe(struct usb_interface *, const struct usb_device_id *); 748 749 static struct usb_driver speedtch_usb_driver = { 750 .name = speedtch_driver_name, 751 .probe = speedtch_usb_probe, 752 .disconnect = usbatm_usb_disconnect, 753 .pre_reset = speedtch_pre_reset, 754 .post_reset = speedtch_post_reset, 755 .id_table = speedtch_usb_ids 756 }; 757 758 static void speedtch_release_interfaces(struct usb_device *usb_dev, 759 int num_interfaces) 760 { 761 struct usb_interface *cur_intf; 762 int i; 763 764 for (i = 0; i < num_interfaces; i++) { 765 cur_intf = usb_ifnum_to_if(usb_dev, i); 766 if (cur_intf) { 767 usb_set_intfdata(cur_intf, NULL); 768 usb_driver_release_interface(&speedtch_usb_driver, cur_intf); 769 } 770 } 771 } 772 773 static int speedtch_bind(struct usbatm_data *usbatm, 774 struct usb_interface *intf, 775 const struct usb_device_id *id) 776 { 777 struct usb_device *usb_dev = interface_to_usbdev(intf); 778 struct usb_interface *cur_intf, *data_intf; 779 struct speedtch_instance_data *instance; 780 int ifnum = intf->altsetting->desc.bInterfaceNumber; 781 int num_interfaces = usb_dev->actconfig->desc.bNumInterfaces; 782 int i, ret; 783 int use_isoc; 784 785 usb_dbg(usbatm, "%s entered\n", __func__); 786 787 /* sanity checks */ 788 789 if (usb_dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) { 790 usb_err(usbatm, "%s: wrong device class %d\n", __func__, usb_dev->descriptor.bDeviceClass); 791 return -ENODEV; 792 } 793 794 data_intf = usb_ifnum_to_if(usb_dev, INTERFACE_DATA); 795 if (!data_intf) { 796 usb_err(usbatm, "%s: data interface not found!\n", __func__); 797 return -ENODEV; 798 } 799 800 /* claim all interfaces */ 801 802 for (i = 0; i < num_interfaces; i++) { 803 cur_intf = usb_ifnum_to_if(usb_dev, i); 804 805 if ((i != ifnum) && cur_intf) { 806 ret = usb_driver_claim_interface(&speedtch_usb_driver, cur_intf, usbatm); 807 808 if (ret < 0) { 809 usb_err(usbatm, "%s: failed to claim interface %2d (%d)!\n", __func__, i, ret); 810 speedtch_release_interfaces(usb_dev, i); 811 return ret; 812 } 813 } 814 } 815 816 instance = kzalloc(sizeof(*instance), GFP_KERNEL); 817 818 if (!instance) { 819 ret = -ENOMEM; 820 goto fail_release; 821 } 822 823 instance->usbatm = usbatm; 824 825 /* module parameters may change at any moment, so take a snapshot */ 826 instance->params.altsetting = altsetting; 827 instance->params.BMaxDSL = BMaxDSL; 828 instance->params.ModemMode = ModemMode; 829 memcpy(instance->params.ModemOption, DEFAULT_MODEM_OPTION, MODEM_OPTION_LENGTH); 830 memcpy(instance->params.ModemOption, ModemOption, num_ModemOption); 831 use_isoc = enable_isoc; 832 833 if (instance->params.altsetting) 834 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, instance->params.altsetting)) < 0) { 835 usb_err(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, instance->params.altsetting, ret); 836 instance->params.altsetting = 0; /* fall back to default */ 837 } 838 839 if (!instance->params.altsetting && use_isoc) 840 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, DEFAULT_ISOC_ALTSETTING)) < 0) { 841 usb_dbg(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, DEFAULT_ISOC_ALTSETTING, ret); 842 use_isoc = 0; /* fall back to bulk */ 843 } 844 845 if (use_isoc) { 846 const struct usb_host_interface *desc = data_intf->cur_altsetting; 847 const __u8 target_address = USB_DIR_IN | usbatm->driver->isoc_in; 848 849 use_isoc = 0; /* fall back to bulk if endpoint not found */ 850 851 for (i = 0; i < desc->desc.bNumEndpoints; i++) { 852 const struct usb_endpoint_descriptor *endpoint_desc = &desc->endpoint[i].desc; 853 854 if ((endpoint_desc->bEndpointAddress == target_address)) { 855 use_isoc = 856 usb_endpoint_xfer_isoc(endpoint_desc); 857 break; 858 } 859 } 860 861 if (!use_isoc) 862 usb_info(usbatm, "isochronous transfer not supported - using bulk\n"); 863 } 864 865 if (!use_isoc && !instance->params.altsetting) 866 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, DEFAULT_BULK_ALTSETTING)) < 0) { 867 usb_err(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, DEFAULT_BULK_ALTSETTING, ret); 868 goto fail_free; 869 } 870 871 if (!instance->params.altsetting) 872 instance->params.altsetting = use_isoc ? DEFAULT_ISOC_ALTSETTING : DEFAULT_BULK_ALTSETTING; 873 874 usbatm->flags |= (use_isoc ? UDSL_USE_ISOC : 0); 875 876 INIT_WORK(&instance->status_check_work, speedtch_check_status); 877 init_timer(&instance->status_check_timer); 878 879 instance->status_check_timer.function = speedtch_status_poll; 880 instance->status_check_timer.data = (unsigned long)instance; 881 instance->last_status = 0xff; 882 instance->poll_delay = MIN_POLL_DELAY; 883 884 init_timer(&instance->resubmit_timer); 885 instance->resubmit_timer.function = speedtch_resubmit_int; 886 instance->resubmit_timer.data = (unsigned long)instance; 887 888 instance->int_urb = usb_alloc_urb(0, GFP_KERNEL); 889 890 if (instance->int_urb) 891 usb_fill_int_urb(instance->int_urb, usb_dev, 892 usb_rcvintpipe(usb_dev, ENDPOINT_INT), 893 instance->int_data, sizeof(instance->int_data), 894 speedtch_handle_int, instance, 16); 895 else 896 usb_dbg(usbatm, "%s: no memory for interrupt urb!\n", __func__); 897 898 /* check whether the modem already seems to be alive */ 899 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 900 0x12, 0xc0, 0x07, 0x00, 901 instance->scratch_buffer + OFFSET_7, SIZE_7, 500); 902 903 usbatm->flags |= (ret == SIZE_7 ? UDSL_SKIP_HEAVY_INIT : 0); 904 905 usb_dbg(usbatm, "%s: firmware %s loaded\n", __func__, usbatm->flags & UDSL_SKIP_HEAVY_INIT ? "already" : "not"); 906 907 if (!(usbatm->flags & UDSL_SKIP_HEAVY_INIT)) 908 if ((ret = usb_reset_device(usb_dev)) < 0) { 909 usb_err(usbatm, "%s: device reset failed (%d)!\n", __func__, ret); 910 goto fail_free; 911 } 912 913 usbatm->driver_data = instance; 914 915 return 0; 916 917 fail_free: 918 usb_free_urb(instance->int_urb); 919 kfree(instance); 920 fail_release: 921 speedtch_release_interfaces(usb_dev, num_interfaces); 922 return ret; 923 } 924 925 static void speedtch_unbind(struct usbatm_data *usbatm, struct usb_interface *intf) 926 { 927 struct usb_device *usb_dev = interface_to_usbdev(intf); 928 struct speedtch_instance_data *instance = usbatm->driver_data; 929 930 usb_dbg(usbatm, "%s entered\n", __func__); 931 932 speedtch_release_interfaces(usb_dev, usb_dev->actconfig->desc.bNumInterfaces); 933 usb_free_urb(instance->int_urb); 934 kfree(instance); 935 } 936 937 938 /*********** 939 ** init ** 940 ***********/ 941 942 static struct usbatm_driver speedtch_usbatm_driver = { 943 .driver_name = speedtch_driver_name, 944 .bind = speedtch_bind, 945 .heavy_init = speedtch_heavy_init, 946 .unbind = speedtch_unbind, 947 .atm_start = speedtch_atm_start, 948 .atm_stop = speedtch_atm_stop, 949 .bulk_in = ENDPOINT_BULK_DATA, 950 .bulk_out = ENDPOINT_BULK_DATA, 951 .isoc_in = ENDPOINT_ISOC_DATA 952 }; 953 954 static int speedtch_usb_probe(struct usb_interface *intf, const struct usb_device_id *id) 955 { 956 return usbatm_usb_probe(intf, id, &speedtch_usbatm_driver); 957 } 958 959 module_usb_driver(speedtch_usb_driver); 960 961 MODULE_AUTHOR(DRIVER_AUTHOR); 962 MODULE_DESCRIPTION(DRIVER_DESC); 963 MODULE_LICENSE("GPL"); 964