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/gfp.h> 31 #include <linux/init.h> 32 #include <linux/kernel.h> 33 #include <linux/module.h> 34 #include <linux/moduleparam.h> 35 #include <linux/slab.h> 36 #include <linux/stat.h> 37 #include <linux/timer.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_VERSION "1.9" 44 #define DRIVER_DESC "Alcatel SpeedTouch USB driver version " DRIVER_VERSION 45 46 static const char speedtch_driver_name[] = "speedtch"; 47 48 #define CTRL_TIMEOUT 2000 /* milliseconds */ 49 #define DATA_TIMEOUT 2000 /* milliseconds */ 50 51 #define OFFSET_7 0 /* size 1 */ 52 #define OFFSET_b 1 /* size 8 */ 53 #define OFFSET_d 9 /* size 4 */ 54 #define OFFSET_e 13 /* size 1 */ 55 #define OFFSET_f 14 /* size 1 */ 56 #define TOTAL 15 57 58 #define SIZE_7 1 59 #define SIZE_b 8 60 #define SIZE_d 4 61 #define SIZE_e 1 62 #define SIZE_f 1 63 64 #define MIN_POLL_DELAY 5000 /* milliseconds */ 65 #define MAX_POLL_DELAY 60000 /* milliseconds */ 66 67 #define RESUBMIT_DELAY 1000 /* milliseconds */ 68 69 #define DEFAULT_ALTSETTING 1 70 #define DEFAULT_DL_512_FIRST 0 71 #define DEFAULT_SW_BUFFERING 0 72 73 static int altsetting = DEFAULT_ALTSETTING; 74 static int dl_512_first = DEFAULT_DL_512_FIRST; 75 static int sw_buffering = DEFAULT_SW_BUFFERING; 76 77 module_param(altsetting, int, S_IRUGO | S_IWUSR); 78 MODULE_PARM_DESC(altsetting, 79 "Alternative setting for data interface (default: " 80 __MODULE_STRING(DEFAULT_ALTSETTING) ")"); 81 82 module_param(dl_512_first, bool, S_IRUGO | S_IWUSR); 83 MODULE_PARM_DESC(dl_512_first, 84 "Read 512 bytes before sending firmware (default: " 85 __MODULE_STRING(DEFAULT_DL_512_FIRST) ")"); 86 87 module_param(sw_buffering, bool, S_IRUGO | S_IWUSR); 88 MODULE_PARM_DESC(sw_buffering, 89 "Enable software buffering (default: " 90 __MODULE_STRING(DEFAULT_SW_BUFFERING) ")"); 91 92 #define ENDPOINT_INT 0x81 93 #define ENDPOINT_DATA 0x07 94 #define ENDPOINT_FIRMWARE 0x05 95 96 #define hex2int(c) ( (c >= '0') && (c <= '9') ? (c - '0') : ((c & 0xf) + 9) ) 97 98 struct speedtch_instance_data { 99 struct usbatm_data *usbatm; 100 101 struct work_struct status_checker; 102 103 unsigned char last_status; 104 105 int poll_delay; /* milliseconds */ 106 107 struct timer_list resubmit_timer; 108 struct urb *int_urb; 109 unsigned char int_data[16]; 110 111 unsigned char scratch_buffer[TOTAL]; 112 }; 113 114 /*************** 115 ** firmware ** 116 ***************/ 117 118 static void speedtch_set_swbuff(struct speedtch_instance_data *instance, int state) 119 { 120 struct usbatm_data *usbatm = instance->usbatm; 121 struct usb_device *usb_dev = usbatm->usb_dev; 122 int ret; 123 124 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 125 0x32, 0x40, state ? 0x01 : 0x00, 0x00, NULL, 0, CTRL_TIMEOUT); 126 if (ret < 0) 127 usb_warn(usbatm, 128 "%sabling SW buffering: usb_control_msg returned %d\n", 129 state ? "En" : "Dis", ret); 130 else 131 dbg("speedtch_set_swbuff: %sbled SW buffering", state ? "En" : "Dis"); 132 } 133 134 static void speedtch_test_sequence(struct speedtch_instance_data *instance) 135 { 136 struct usbatm_data *usbatm = instance->usbatm; 137 struct usb_device *usb_dev = usbatm->usb_dev; 138 unsigned char *buf = instance->scratch_buffer; 139 int ret; 140 141 /* URB 147 */ 142 buf[0] = 0x1c; 143 buf[1] = 0x50; 144 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 145 0x01, 0x40, 0x0b, 0x00, buf, 2, CTRL_TIMEOUT); 146 if (ret < 0) 147 usb_warn(usbatm, "%s failed on URB147: %d\n", __func__, ret); 148 149 /* URB 148 */ 150 buf[0] = 0x32; 151 buf[1] = 0x00; 152 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 153 0x01, 0x40, 0x02, 0x00, buf, 2, CTRL_TIMEOUT); 154 if (ret < 0) 155 usb_warn(usbatm, "%s failed on URB148: %d\n", __func__, ret); 156 157 /* URB 149 */ 158 buf[0] = 0x01; 159 buf[1] = 0x00; 160 buf[2] = 0x01; 161 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 162 0x01, 0x40, 0x03, 0x00, buf, 3, CTRL_TIMEOUT); 163 if (ret < 0) 164 usb_warn(usbatm, "%s failed on URB149: %d\n", __func__, ret); 165 166 /* URB 150 */ 167 buf[0] = 0x01; 168 buf[1] = 0x00; 169 buf[2] = 0x01; 170 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 171 0x01, 0x40, 0x04, 0x00, buf, 3, CTRL_TIMEOUT); 172 if (ret < 0) 173 usb_warn(usbatm, "%s failed on URB150: %d\n", __func__, ret); 174 } 175 176 static int speedtch_upload_firmware(struct speedtch_instance_data *instance, 177 const struct firmware *fw1, 178 const struct firmware *fw2) 179 { 180 unsigned char *buffer; 181 struct usbatm_data *usbatm = instance->usbatm; 182 struct usb_interface *intf; 183 struct usb_device *usb_dev = usbatm->usb_dev; 184 int actual_length; 185 int ret = 0; 186 int offset; 187 188 usb_dbg(usbatm, "%s entered\n", __func__); 189 190 if (!(buffer = (unsigned char *)__get_free_page(GFP_KERNEL))) { 191 ret = -ENOMEM; 192 usb_dbg(usbatm, "%s: no memory for buffer!\n", __func__); 193 goto out; 194 } 195 196 if (!(intf = usb_ifnum_to_if(usb_dev, 2))) { 197 ret = -ENODEV; 198 usb_dbg(usbatm, "%s: interface not found!\n", __func__); 199 goto out_free; 200 } 201 202 /* URB 7 */ 203 if (dl_512_first) { /* some modems need a read before writing the firmware */ 204 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE), 205 buffer, 0x200, &actual_length, 2000); 206 207 if (ret < 0 && ret != -ETIMEDOUT) 208 usb_dbg(usbatm, "%s: read BLOCK0 from modem failed (%d)!\n", __func__, ret); 209 else 210 usb_dbg(usbatm, "%s: BLOCK0 downloaded (%d bytes)\n", __func__, ret); 211 } 212 213 /* URB 8 : both leds are static green */ 214 for (offset = 0; offset < fw1->size; offset += PAGE_SIZE) { 215 int thislen = min_t(int, PAGE_SIZE, fw1->size - offset); 216 memcpy(buffer, fw1->data + offset, thislen); 217 218 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, ENDPOINT_FIRMWARE), 219 buffer, thislen, &actual_length, DATA_TIMEOUT); 220 221 if (ret < 0) { 222 usb_dbg(usbatm, "%s: write BLOCK1 to modem failed (%d)!\n", __func__, ret); 223 goto out_free; 224 } 225 usb_dbg(usbatm, "%s: BLOCK1 uploaded (%zu bytes)\n", __func__, fw1->size); 226 } 227 228 /* USB led blinking green, ADSL led off */ 229 230 /* URB 11 */ 231 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE), 232 buffer, 0x200, &actual_length, DATA_TIMEOUT); 233 234 if (ret < 0) { 235 usb_dbg(usbatm, "%s: read BLOCK2 from modem failed (%d)!\n", __func__, ret); 236 goto out_free; 237 } 238 usb_dbg(usbatm, "%s: BLOCK2 downloaded (%d bytes)\n", __func__, actual_length); 239 240 /* URBs 12 to 139 - USB led blinking green, ADSL led off */ 241 for (offset = 0; offset < fw2->size; offset += PAGE_SIZE) { 242 int thislen = min_t(int, PAGE_SIZE, fw2->size - offset); 243 memcpy(buffer, fw2->data + offset, thislen); 244 245 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, ENDPOINT_FIRMWARE), 246 buffer, thislen, &actual_length, DATA_TIMEOUT); 247 248 if (ret < 0) { 249 usb_dbg(usbatm, "%s: write BLOCK3 to modem failed (%d)!\n", __func__, ret); 250 goto out_free; 251 } 252 } 253 usb_dbg(usbatm, "%s: BLOCK3 uploaded (%zu bytes)\n", __func__, fw2->size); 254 255 /* USB led static green, ADSL led static red */ 256 257 /* URB 142 */ 258 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE), 259 buffer, 0x200, &actual_length, DATA_TIMEOUT); 260 261 if (ret < 0) { 262 usb_dbg(usbatm, "%s: read BLOCK4 from modem failed (%d)!\n", __func__, ret); 263 goto out_free; 264 } 265 266 /* success */ 267 usb_dbg(usbatm, "%s: BLOCK4 downloaded (%d bytes)\n", __func__, actual_length); 268 269 /* Delay to allow firmware to start up. We can do this here 270 because we're in our own kernel thread anyway. */ 271 msleep_interruptible(1000); 272 273 /* Enable software buffering, if requested */ 274 if (sw_buffering) 275 speedtch_set_swbuff(instance, 1); 276 277 /* Magic spell; don't ask us what this does */ 278 speedtch_test_sequence(instance); 279 280 ret = 0; 281 282 out_free: 283 free_page((unsigned long)buffer); 284 out: 285 return ret; 286 } 287 288 static int speedtch_find_firmware(struct usb_interface *intf, int phase, 289 const struct firmware **fw_p) 290 { 291 struct device *dev = &intf->dev; 292 const u16 bcdDevice = le16_to_cpu(interface_to_usbdev(intf)->descriptor.bcdDevice); 293 const u8 major_revision = bcdDevice >> 8; 294 const u8 minor_revision = bcdDevice & 0xff; 295 char buf[24]; 296 297 sprintf(buf, "speedtch-%d.bin.%x.%02x", phase, major_revision, minor_revision); 298 dev_dbg(dev, "%s: looking for %s\n", __func__, buf); 299 300 if (request_firmware(fw_p, buf, dev)) { 301 sprintf(buf, "speedtch-%d.bin.%x", phase, major_revision); 302 dev_dbg(dev, "%s: looking for %s\n", __func__, buf); 303 304 if (request_firmware(fw_p, buf, dev)) { 305 sprintf(buf, "speedtch-%d.bin", phase); 306 dev_dbg(dev, "%s: looking for %s\n", __func__, buf); 307 308 if (request_firmware(fw_p, buf, dev)) { 309 dev_warn(dev, "no stage %d firmware found!\n", phase); 310 return -ENOENT; 311 } 312 } 313 } 314 315 dev_info(dev, "found stage %d firmware %s\n", phase, buf); 316 317 return 0; 318 } 319 320 static int speedtch_heavy_init(struct usbatm_data *usbatm, struct usb_interface *intf) 321 { 322 const struct firmware *fw1, *fw2; 323 struct speedtch_instance_data *instance = usbatm->driver_data; 324 int ret; 325 326 if ((ret = speedtch_find_firmware(intf, 1, &fw1)) < 0) 327 return ret; 328 329 if ((ret = speedtch_find_firmware(intf, 2, &fw2)) < 0) { 330 release_firmware(fw1); 331 return ret; 332 } 333 334 ret = speedtch_upload_firmware(instance, fw1, fw2); 335 336 release_firmware(fw2); 337 release_firmware(fw1); 338 339 return ret; 340 } 341 342 343 /********** 344 ** ATM ** 345 **********/ 346 347 static int speedtch_read_status(struct speedtch_instance_data *instance) 348 { 349 struct usbatm_data *usbatm = instance->usbatm; 350 struct usb_device *usb_dev = usbatm->usb_dev; 351 unsigned char *buf = instance->scratch_buffer; 352 int ret; 353 354 memset(buf, 0, TOTAL); 355 356 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 357 0x12, 0xc0, 0x07, 0x00, buf + OFFSET_7, SIZE_7, 358 CTRL_TIMEOUT); 359 if (ret < 0) { 360 atm_dbg(usbatm, "%s: MSG 7 failed\n", __func__); 361 return ret; 362 } 363 364 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 365 0x12, 0xc0, 0x0b, 0x00, buf + OFFSET_b, SIZE_b, 366 CTRL_TIMEOUT); 367 if (ret < 0) { 368 atm_dbg(usbatm, "%s: MSG B failed\n", __func__); 369 return ret; 370 } 371 372 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 373 0x12, 0xc0, 0x0d, 0x00, buf + OFFSET_d, SIZE_d, 374 CTRL_TIMEOUT); 375 if (ret < 0) { 376 atm_dbg(usbatm, "%s: MSG D failed\n", __func__); 377 return ret; 378 } 379 380 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 381 0x01, 0xc0, 0x0e, 0x00, buf + OFFSET_e, SIZE_e, 382 CTRL_TIMEOUT); 383 if (ret < 0) { 384 atm_dbg(usbatm, "%s: MSG E failed\n", __func__); 385 return ret; 386 } 387 388 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 389 0x01, 0xc0, 0x0f, 0x00, buf + OFFSET_f, SIZE_f, 390 CTRL_TIMEOUT); 391 if (ret < 0) { 392 atm_dbg(usbatm, "%s: MSG F failed\n", __func__); 393 return ret; 394 } 395 396 return 0; 397 } 398 399 static int speedtch_start_synchro(struct speedtch_instance_data *instance) 400 { 401 struct usbatm_data *usbatm = instance->usbatm; 402 struct usb_device *usb_dev = usbatm->usb_dev; 403 unsigned char *buf = instance->scratch_buffer; 404 int ret; 405 406 atm_dbg(usbatm, "%s entered\n", __func__); 407 408 memset(buf, 0, 2); 409 410 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 411 0x12, 0xc0, 0x04, 0x00, 412 buf, 2, CTRL_TIMEOUT); 413 414 if (ret < 0) 415 atm_warn(usbatm, "failed to start ADSL synchronisation: %d\n", ret); 416 else 417 atm_dbg(usbatm, "%s: modem prodded. %d bytes returned: %02x %02x\n", 418 __func__, ret, buf[0], buf[1]); 419 420 return ret; 421 } 422 423 static void speedtch_check_status(struct speedtch_instance_data *instance) 424 { 425 struct usbatm_data *usbatm = instance->usbatm; 426 struct atm_dev *atm_dev = usbatm->atm_dev; 427 unsigned char *buf = instance->scratch_buffer; 428 int down_speed, up_speed, ret; 429 unsigned char status; 430 431 atm_dbg(usbatm, "%s entered\n", __func__); 432 433 ret = speedtch_read_status(instance); 434 if (ret < 0) { 435 atm_warn(usbatm, "error %d fetching device status\n", ret); 436 instance->poll_delay = min(2 * instance->poll_delay, MAX_POLL_DELAY); 437 return; 438 } 439 440 instance->poll_delay = max(instance->poll_delay / 2, MIN_POLL_DELAY); 441 442 status = buf[OFFSET_7]; 443 444 atm_dbg(usbatm, "%s: line state %02x\n", __func__, status); 445 446 if ((status != instance->last_status) || !status) { 447 switch (status) { 448 case 0: 449 atm_dev->signal = ATM_PHY_SIG_LOST; 450 if (instance->last_status) 451 atm_info(usbatm, "ADSL line is down\n"); 452 /* It may never resync again unless we ask it to... */ 453 ret = speedtch_start_synchro(instance); 454 break; 455 456 case 0x08: 457 atm_dev->signal = ATM_PHY_SIG_UNKNOWN; 458 atm_info(usbatm, "ADSL line is blocked?\n"); 459 break; 460 461 case 0x10: 462 atm_dev->signal = ATM_PHY_SIG_LOST; 463 atm_info(usbatm, "ADSL line is synchronising\n"); 464 break; 465 466 case 0x20: 467 down_speed = buf[OFFSET_b] | (buf[OFFSET_b + 1] << 8) 468 | (buf[OFFSET_b + 2] << 16) | (buf[OFFSET_b + 3] << 24); 469 up_speed = buf[OFFSET_b + 4] | (buf[OFFSET_b + 5] << 8) 470 | (buf[OFFSET_b + 6] << 16) | (buf[OFFSET_b + 7] << 24); 471 472 if (!(down_speed & 0x0000ffff) && !(up_speed & 0x0000ffff)) { 473 down_speed >>= 16; 474 up_speed >>= 16; 475 } 476 477 atm_dev->link_rate = down_speed * 1000 / 424; 478 atm_dev->signal = ATM_PHY_SIG_FOUND; 479 480 atm_info(usbatm, 481 "ADSL line is up (%d kb/s down | %d kb/s up)\n", 482 down_speed, up_speed); 483 break; 484 485 default: 486 atm_dev->signal = ATM_PHY_SIG_UNKNOWN; 487 atm_info(usbatm, "Unknown line state %02x\n", status); 488 break; 489 } 490 491 instance->last_status = status; 492 } 493 } 494 495 static void speedtch_status_poll(unsigned long data) 496 { 497 struct speedtch_instance_data *instance = (void *)data; 498 499 schedule_work(&instance->status_checker); 500 501 /* The following check is racy, but the race is harmless */ 502 if (instance->poll_delay < MAX_POLL_DELAY) 503 mod_timer(&instance->status_checker.timer, jiffies + msecs_to_jiffies(instance->poll_delay)); 504 else 505 atm_warn(instance->usbatm, "Too many failures - disabling line status polling\n"); 506 } 507 508 static void speedtch_resubmit_int(unsigned long data) 509 { 510 struct speedtch_instance_data *instance = (void *)data; 511 struct urb *int_urb = instance->int_urb; 512 int ret; 513 514 atm_dbg(instance->usbatm, "%s entered\n", __func__); 515 516 if (int_urb) { 517 ret = usb_submit_urb(int_urb, GFP_ATOMIC); 518 if (!ret) 519 schedule_work(&instance->status_checker); 520 else { 521 atm_dbg(instance->usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret); 522 mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY)); 523 } 524 } 525 } 526 527 static void speedtch_handle_int(struct urb *int_urb, struct pt_regs *regs) 528 { 529 struct speedtch_instance_data *instance = int_urb->context; 530 struct usbatm_data *usbatm = instance->usbatm; 531 unsigned int count = int_urb->actual_length; 532 int ret = int_urb->status; 533 534 /* The magic interrupt for "up state" */ 535 static const unsigned char up_int[6] = { 0xa1, 0x00, 0x01, 0x00, 0x00, 0x00 }; 536 /* The magic interrupt for "down state" */ 537 static const unsigned char down_int[6] = { 0xa1, 0x00, 0x00, 0x00, 0x00, 0x00 }; 538 539 atm_dbg(usbatm, "%s entered\n", __func__); 540 541 if (ret < 0) { 542 atm_dbg(usbatm, "%s: nonzero urb status %d!\n", __func__, ret); 543 goto fail; 544 } 545 546 if ((count == 6) && !memcmp(up_int, instance->int_data, 6)) { 547 del_timer(&instance->status_checker.timer); 548 atm_info(usbatm, "DSL line goes up\n"); 549 } else if ((count == 6) && !memcmp(down_int, instance->int_data, 6)) { 550 atm_info(usbatm, "DSL line goes down\n"); 551 } else { 552 int i; 553 554 atm_dbg(usbatm, "%s: unknown interrupt packet of length %d:", __func__, count); 555 for (i = 0; i < count; i++) 556 printk(" %02x", instance->int_data[i]); 557 printk("\n"); 558 goto fail; 559 } 560 561 if ((int_urb = instance->int_urb)) { 562 ret = usb_submit_urb(int_urb, GFP_ATOMIC); 563 schedule_work(&instance->status_checker); 564 if (ret < 0) { 565 atm_dbg(usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret); 566 goto fail; 567 } 568 } 569 570 return; 571 572 fail: 573 if ((int_urb = instance->int_urb)) 574 mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY)); 575 } 576 577 static int speedtch_atm_start(struct usbatm_data *usbatm, struct atm_dev *atm_dev) 578 { 579 struct usb_device *usb_dev = usbatm->usb_dev; 580 struct speedtch_instance_data *instance = usbatm->driver_data; 581 int i, ret; 582 unsigned char mac_str[13]; 583 584 atm_dbg(usbatm, "%s entered\n", __func__); 585 586 if ((ret = usb_set_interface(usb_dev, 1, altsetting)) < 0) { 587 atm_dbg(usbatm, "%s: usb_set_interface returned %d!\n", __func__, ret); 588 return ret; 589 } 590 591 /* Set MAC address, it is stored in the serial number */ 592 memset(atm_dev->esi, 0, sizeof(atm_dev->esi)); 593 if (usb_string(usb_dev, usb_dev->descriptor.iSerialNumber, mac_str, sizeof(mac_str)) == 12) { 594 for (i = 0; i < 6; i++) 595 atm_dev->esi[i] = (hex2int(mac_str[i * 2]) * 16) + (hex2int(mac_str[i * 2 + 1])); 596 } 597 598 /* Start modem synchronisation */ 599 ret = speedtch_start_synchro(instance); 600 601 /* Set up interrupt endpoint */ 602 if (instance->int_urb) { 603 ret = usb_submit_urb(instance->int_urb, GFP_KERNEL); 604 if (ret < 0) { 605 /* Doesn't matter; we'll poll anyway */ 606 atm_dbg(usbatm, "%s: submission of interrupt URB failed (%d)!\n", __func__, ret); 607 usb_free_urb(instance->int_urb); 608 instance->int_urb = NULL; 609 } 610 } 611 612 /* Start status polling */ 613 mod_timer(&instance->status_checker.timer, jiffies + msecs_to_jiffies(1000)); 614 615 return 0; 616 } 617 618 static void speedtch_atm_stop(struct usbatm_data *usbatm, struct atm_dev *atm_dev) 619 { 620 struct speedtch_instance_data *instance = usbatm->driver_data; 621 struct urb *int_urb = instance->int_urb; 622 623 atm_dbg(usbatm, "%s entered\n", __func__); 624 625 del_timer_sync(&instance->status_checker.timer); 626 627 /* 628 * Since resubmit_timer and int_urb can schedule themselves and 629 * each other, shutting them down correctly takes some care 630 */ 631 instance->int_urb = NULL; /* signal shutdown */ 632 mb(); 633 usb_kill_urb(int_urb); 634 del_timer_sync(&instance->resubmit_timer); 635 /* 636 * At this point, speedtch_handle_int and speedtch_resubmit_int 637 * can run or be running, but instance->int_urb == NULL means that 638 * they will not reschedule 639 */ 640 usb_kill_urb(int_urb); 641 del_timer_sync(&instance->resubmit_timer); 642 usb_free_urb(int_urb); 643 644 flush_scheduled_work(); 645 } 646 647 648 /********** 649 ** USB ** 650 **********/ 651 652 static struct usb_device_id speedtch_usb_ids[] = { 653 {USB_DEVICE(0x06b9, 0x4061)}, 654 {} 655 }; 656 657 MODULE_DEVICE_TABLE(usb, speedtch_usb_ids); 658 659 static int speedtch_usb_probe(struct usb_interface *, const struct usb_device_id *); 660 661 static struct usb_driver speedtch_usb_driver = { 662 .name = speedtch_driver_name, 663 .probe = speedtch_usb_probe, 664 .disconnect = usbatm_usb_disconnect, 665 .id_table = speedtch_usb_ids 666 }; 667 668 static void speedtch_release_interfaces(struct usb_device *usb_dev, int num_interfaces) { 669 struct usb_interface *cur_intf; 670 int i; 671 672 for(i = 0; i < num_interfaces; i++) 673 if ((cur_intf = usb_ifnum_to_if(usb_dev, i))) { 674 usb_set_intfdata(cur_intf, NULL); 675 usb_driver_release_interface(&speedtch_usb_driver, cur_intf); 676 } 677 } 678 679 static int speedtch_bind(struct usbatm_data *usbatm, 680 struct usb_interface *intf, 681 const struct usb_device_id *id, 682 int *need_heavy_init) 683 { 684 struct usb_device *usb_dev = interface_to_usbdev(intf); 685 struct usb_interface *cur_intf; 686 struct speedtch_instance_data *instance; 687 int ifnum = intf->altsetting->desc.bInterfaceNumber; 688 int num_interfaces = usb_dev->actconfig->desc.bNumInterfaces; 689 int i, ret; 690 691 usb_dbg(usbatm, "%s entered\n", __func__); 692 693 if (usb_dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) { 694 usb_dbg(usbatm, "%s: wrong device class %d\n", __func__, usb_dev->descriptor.bDeviceClass); 695 return -ENODEV; 696 } 697 698 /* claim all interfaces */ 699 700 for (i=0; i < num_interfaces; i++) { 701 cur_intf = usb_ifnum_to_if(usb_dev, i); 702 703 if ((i != ifnum) && cur_intf) { 704 ret = usb_driver_claim_interface(&speedtch_usb_driver, cur_intf, usbatm); 705 706 if (ret < 0) { 707 usb_dbg(usbatm, "%s: failed to claim interface %d (%d)\n", __func__, i, ret); 708 speedtch_release_interfaces(usb_dev, i); 709 return ret; 710 } 711 } 712 } 713 714 instance = kmalloc(sizeof(*instance), GFP_KERNEL); 715 716 if (!instance) { 717 usb_dbg(usbatm, "%s: no memory for instance data!\n", __func__); 718 ret = -ENOMEM; 719 goto fail_release; 720 } 721 722 memset(instance, 0, sizeof(struct speedtch_instance_data)); 723 724 instance->usbatm = usbatm; 725 726 INIT_WORK(&instance->status_checker, (void *)speedtch_check_status, instance); 727 728 instance->status_checker.timer.function = speedtch_status_poll; 729 instance->status_checker.timer.data = (unsigned long)instance; 730 instance->last_status = 0xff; 731 instance->poll_delay = MIN_POLL_DELAY; 732 733 init_timer(&instance->resubmit_timer); 734 instance->resubmit_timer.function = speedtch_resubmit_int; 735 instance->resubmit_timer.data = (unsigned long)instance; 736 737 instance->int_urb = usb_alloc_urb(0, GFP_KERNEL); 738 739 if (instance->int_urb) 740 usb_fill_int_urb(instance->int_urb, usb_dev, 741 usb_rcvintpipe(usb_dev, ENDPOINT_INT), 742 instance->int_data, sizeof(instance->int_data), 743 speedtch_handle_int, instance, 50); 744 else 745 usb_dbg(usbatm, "%s: no memory for interrupt urb!\n", __func__); 746 747 /* check whether the modem already seems to be alive */ 748 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 749 0x12, 0xc0, 0x07, 0x00, 750 instance->scratch_buffer + OFFSET_7, SIZE_7, 500); 751 752 *need_heavy_init = (ret != SIZE_7); 753 754 usb_dbg(usbatm, "%s: firmware %s loaded\n", __func__, need_heavy_init ? "not" : "already"); 755 756 if (*need_heavy_init) 757 if ((ret = usb_reset_device(usb_dev)) < 0) 758 goto fail_free; 759 760 usbatm->driver_data = instance; 761 762 return 0; 763 764 fail_free: 765 usb_free_urb(instance->int_urb); 766 kfree(instance); 767 fail_release: 768 speedtch_release_interfaces(usb_dev, num_interfaces); 769 return ret; 770 } 771 772 static void speedtch_unbind(struct usbatm_data *usbatm, struct usb_interface *intf) 773 { 774 struct usb_device *usb_dev = interface_to_usbdev(intf); 775 struct speedtch_instance_data *instance = usbatm->driver_data; 776 777 usb_dbg(usbatm, "%s entered\n", __func__); 778 779 speedtch_release_interfaces(usb_dev, usb_dev->actconfig->desc.bNumInterfaces); 780 usb_free_urb(instance->int_urb); 781 kfree(instance); 782 } 783 784 785 /*********** 786 ** init ** 787 ***********/ 788 789 static struct usbatm_driver speedtch_usbatm_driver = { 790 .owner = THIS_MODULE, 791 .driver_name = speedtch_driver_name, 792 .bind = speedtch_bind, 793 .heavy_init = speedtch_heavy_init, 794 .unbind = speedtch_unbind, 795 .atm_start = speedtch_atm_start, 796 .atm_stop = speedtch_atm_stop, 797 .in = ENDPOINT_DATA, 798 .out = ENDPOINT_DATA 799 }; 800 801 static int speedtch_usb_probe(struct usb_interface *intf, const struct usb_device_id *id) 802 { 803 return usbatm_usb_probe(intf, id, &speedtch_usbatm_driver); 804 } 805 806 static int __init speedtch_usb_init(void) 807 { 808 dbg("%s: driver version %s", __func__, DRIVER_VERSION); 809 810 return usb_register(&speedtch_usb_driver); 811 } 812 813 static void __exit speedtch_usb_cleanup(void) 814 { 815 dbg("%s", __func__); 816 817 usb_deregister(&speedtch_usb_driver); 818 } 819 820 module_init(speedtch_usb_init); 821 module_exit(speedtch_usb_cleanup); 822 823 MODULE_AUTHOR(DRIVER_AUTHOR); 824 MODULE_DESCRIPTION(DRIVER_DESC); 825 MODULE_LICENSE("GPL"); 826 MODULE_VERSION(DRIVER_VERSION); 827