1 /* 2 * Line 6 Linux USB driver 3 * 4 * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation, version 2. 9 * 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/module.h> 14 #include <linux/export.h> 15 #include <linux/slab.h> 16 #include <linux/usb.h> 17 18 #include <sound/core.h> 19 #include <sound/initval.h> 20 #include <sound/hwdep.h> 21 22 #include "capture.h" 23 #include "driver.h" 24 #include "midi.h" 25 #include "playback.h" 26 27 #define DRIVER_AUTHOR "Markus Grabner <grabner@icg.tugraz.at>" 28 #define DRIVER_DESC "Line 6 USB Driver" 29 30 /* 31 This is Line 6's MIDI manufacturer ID. 32 */ 33 const unsigned char line6_midi_id[3] = { 34 0x00, 0x01, 0x0c 35 }; 36 EXPORT_SYMBOL_GPL(line6_midi_id); 37 38 /* 39 Code to request version of POD, Variax interface 40 (and maybe other devices). 41 */ 42 static const char line6_request_version[] = { 43 0xf0, 0x7e, 0x7f, 0x06, 0x01, 0xf7 44 }; 45 46 /* 47 Class for asynchronous messages. 48 */ 49 struct message { 50 struct usb_line6 *line6; 51 const char *buffer; 52 int size; 53 int done; 54 }; 55 56 /* 57 Forward declarations. 58 */ 59 static void line6_data_received(struct urb *urb); 60 static int line6_send_raw_message_async_part(struct message *msg, 61 struct urb *urb); 62 63 /* 64 Start to listen on endpoint. 65 */ 66 static int line6_start_listen(struct usb_line6 *line6) 67 { 68 int err; 69 70 if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) { 71 usb_fill_int_urb(line6->urb_listen, line6->usbdev, 72 usb_rcvintpipe(line6->usbdev, line6->properties->ep_ctrl_r), 73 line6->buffer_listen, LINE6_BUFSIZE_LISTEN, 74 line6_data_received, line6, line6->interval); 75 } else { 76 usb_fill_bulk_urb(line6->urb_listen, line6->usbdev, 77 usb_rcvbulkpipe(line6->usbdev, line6->properties->ep_ctrl_r), 78 line6->buffer_listen, LINE6_BUFSIZE_LISTEN, 79 line6_data_received, line6); 80 } 81 82 /* sanity checks of EP before actually submitting */ 83 if (usb_urb_ep_type_check(line6->urb_listen)) { 84 dev_err(line6->ifcdev, "invalid control EP\n"); 85 return -EINVAL; 86 } 87 88 line6->urb_listen->actual_length = 0; 89 err = usb_submit_urb(line6->urb_listen, GFP_ATOMIC); 90 return err; 91 } 92 93 /* 94 Stop listening on endpoint. 95 */ 96 static void line6_stop_listen(struct usb_line6 *line6) 97 { 98 usb_kill_urb(line6->urb_listen); 99 } 100 101 /* 102 Send raw message in pieces of wMaxPacketSize bytes. 103 */ 104 static int line6_send_raw_message(struct usb_line6 *line6, const char *buffer, 105 int size) 106 { 107 int i, done = 0; 108 const struct line6_properties *properties = line6->properties; 109 110 for (i = 0; i < size; i += line6->max_packet_size) { 111 int partial; 112 const char *frag_buf = buffer + i; 113 int frag_size = min(line6->max_packet_size, size - i); 114 int retval; 115 116 if (properties->capabilities & LINE6_CAP_CONTROL_MIDI) { 117 retval = usb_interrupt_msg(line6->usbdev, 118 usb_sndintpipe(line6->usbdev, properties->ep_ctrl_w), 119 (char *)frag_buf, frag_size, 120 &partial, LINE6_TIMEOUT * HZ); 121 } else { 122 retval = usb_bulk_msg(line6->usbdev, 123 usb_sndbulkpipe(line6->usbdev, properties->ep_ctrl_w), 124 (char *)frag_buf, frag_size, 125 &partial, LINE6_TIMEOUT * HZ); 126 } 127 128 if (retval) { 129 dev_err(line6->ifcdev, 130 "usb_bulk_msg failed (%d)\n", retval); 131 break; 132 } 133 134 done += frag_size; 135 } 136 137 return done; 138 } 139 140 /* 141 Notification of completion of asynchronous request transmission. 142 */ 143 static void line6_async_request_sent(struct urb *urb) 144 { 145 struct message *msg = (struct message *)urb->context; 146 147 if (msg->done >= msg->size) { 148 usb_free_urb(urb); 149 kfree(msg); 150 } else 151 line6_send_raw_message_async_part(msg, urb); 152 } 153 154 /* 155 Asynchronously send part of a raw message. 156 */ 157 static int line6_send_raw_message_async_part(struct message *msg, 158 struct urb *urb) 159 { 160 int retval; 161 struct usb_line6 *line6 = msg->line6; 162 int done = msg->done; 163 int bytes = min(msg->size - done, line6->max_packet_size); 164 165 if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) { 166 usb_fill_int_urb(urb, line6->usbdev, 167 usb_sndintpipe(line6->usbdev, line6->properties->ep_ctrl_w), 168 (char *)msg->buffer + done, bytes, 169 line6_async_request_sent, msg, line6->interval); 170 } else { 171 usb_fill_bulk_urb(urb, line6->usbdev, 172 usb_sndbulkpipe(line6->usbdev, line6->properties->ep_ctrl_w), 173 (char *)msg->buffer + done, bytes, 174 line6_async_request_sent, msg); 175 } 176 177 msg->done += bytes; 178 179 /* sanity checks of EP before actually submitting */ 180 retval = usb_urb_ep_type_check(urb); 181 if (retval < 0) 182 goto error; 183 184 retval = usb_submit_urb(urb, GFP_ATOMIC); 185 if (retval < 0) 186 goto error; 187 188 return 0; 189 190 error: 191 dev_err(line6->ifcdev, "%s: usb_submit_urb failed (%d)\n", 192 __func__, retval); 193 usb_free_urb(urb); 194 kfree(msg); 195 return retval; 196 } 197 198 /* 199 Setup and start timer. 200 */ 201 void line6_start_timer(struct timer_list *timer, unsigned long msecs, 202 void (*function)(struct timer_list *t)) 203 { 204 timer->function = function; 205 mod_timer(timer, jiffies + msecs_to_jiffies(msecs)); 206 } 207 EXPORT_SYMBOL_GPL(line6_start_timer); 208 209 /* 210 Asynchronously send raw message. 211 */ 212 int line6_send_raw_message_async(struct usb_line6 *line6, const char *buffer, 213 int size) 214 { 215 struct message *msg; 216 struct urb *urb; 217 218 /* create message: */ 219 msg = kmalloc(sizeof(struct message), GFP_ATOMIC); 220 if (msg == NULL) 221 return -ENOMEM; 222 223 /* create URB: */ 224 urb = usb_alloc_urb(0, GFP_ATOMIC); 225 226 if (urb == NULL) { 227 kfree(msg); 228 return -ENOMEM; 229 } 230 231 /* set message data: */ 232 msg->line6 = line6; 233 msg->buffer = buffer; 234 msg->size = size; 235 msg->done = 0; 236 237 /* start sending: */ 238 return line6_send_raw_message_async_part(msg, urb); 239 } 240 EXPORT_SYMBOL_GPL(line6_send_raw_message_async); 241 242 /* 243 Send asynchronous device version request. 244 */ 245 int line6_version_request_async(struct usb_line6 *line6) 246 { 247 char *buffer; 248 int retval; 249 250 buffer = kmemdup(line6_request_version, 251 sizeof(line6_request_version), GFP_ATOMIC); 252 if (buffer == NULL) 253 return -ENOMEM; 254 255 retval = line6_send_raw_message_async(line6, buffer, 256 sizeof(line6_request_version)); 257 kfree(buffer); 258 return retval; 259 } 260 EXPORT_SYMBOL_GPL(line6_version_request_async); 261 262 /* 263 Send sysex message in pieces of wMaxPacketSize bytes. 264 */ 265 int line6_send_sysex_message(struct usb_line6 *line6, const char *buffer, 266 int size) 267 { 268 return line6_send_raw_message(line6, buffer, 269 size + SYSEX_EXTRA_SIZE) - 270 SYSEX_EXTRA_SIZE; 271 } 272 EXPORT_SYMBOL_GPL(line6_send_sysex_message); 273 274 /* 275 Allocate buffer for sysex message and prepare header. 276 @param code sysex message code 277 @param size number of bytes between code and sysex end 278 */ 279 char *line6_alloc_sysex_buffer(struct usb_line6 *line6, int code1, int code2, 280 int size) 281 { 282 char *buffer = kmalloc(size + SYSEX_EXTRA_SIZE, GFP_ATOMIC); 283 284 if (!buffer) 285 return NULL; 286 287 buffer[0] = LINE6_SYSEX_BEGIN; 288 memcpy(buffer + 1, line6_midi_id, sizeof(line6_midi_id)); 289 buffer[sizeof(line6_midi_id) + 1] = code1; 290 buffer[sizeof(line6_midi_id) + 2] = code2; 291 buffer[sizeof(line6_midi_id) + 3 + size] = LINE6_SYSEX_END; 292 return buffer; 293 } 294 EXPORT_SYMBOL_GPL(line6_alloc_sysex_buffer); 295 296 /* 297 Notification of data received from the Line 6 device. 298 */ 299 static void line6_data_received(struct urb *urb) 300 { 301 struct usb_line6 *line6 = (struct usb_line6 *)urb->context; 302 struct midi_buffer *mb = &line6->line6midi->midibuf_in; 303 int done; 304 305 if (urb->status == -ESHUTDOWN) 306 return; 307 308 if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) { 309 done = 310 line6_midibuf_write(mb, urb->transfer_buffer, urb->actual_length); 311 312 if (done < urb->actual_length) { 313 line6_midibuf_ignore(mb, done); 314 dev_dbg(line6->ifcdev, "%d %d buffer overflow - message skipped\n", 315 done, urb->actual_length); 316 } 317 318 for (;;) { 319 done = 320 line6_midibuf_read(mb, line6->buffer_message, 321 LINE6_MIDI_MESSAGE_MAXLEN); 322 323 if (done == 0) 324 break; 325 326 line6->message_length = done; 327 line6_midi_receive(line6, line6->buffer_message, done); 328 329 if (line6->process_message) 330 line6->process_message(line6); 331 } 332 } else { 333 line6->buffer_message = urb->transfer_buffer; 334 line6->message_length = urb->actual_length; 335 if (line6->process_message) 336 line6->process_message(line6); 337 line6->buffer_message = NULL; 338 } 339 340 line6_start_listen(line6); 341 } 342 343 #define LINE6_READ_WRITE_STATUS_DELAY 2 /* milliseconds */ 344 #define LINE6_READ_WRITE_MAX_RETRIES 50 345 346 /* 347 Read data from device. 348 */ 349 int line6_read_data(struct usb_line6 *line6, unsigned address, void *data, 350 unsigned datalen) 351 { 352 struct usb_device *usbdev = line6->usbdev; 353 int ret; 354 unsigned char *len; 355 unsigned count; 356 357 if (address > 0xffff || datalen > 0xff) 358 return -EINVAL; 359 360 len = kmalloc(sizeof(*len), GFP_KERNEL); 361 if (!len) 362 return -ENOMEM; 363 364 /* query the serial number: */ 365 ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67, 366 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, 367 (datalen << 8) | 0x21, address, 368 NULL, 0, LINE6_TIMEOUT * HZ); 369 370 if (ret < 0) { 371 dev_err(line6->ifcdev, "read request failed (error %d)\n", ret); 372 goto exit; 373 } 374 375 /* Wait for data length. We'll get 0xff until length arrives. */ 376 for (count = 0; count < LINE6_READ_WRITE_MAX_RETRIES; count++) { 377 mdelay(LINE6_READ_WRITE_STATUS_DELAY); 378 379 ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67, 380 USB_TYPE_VENDOR | USB_RECIP_DEVICE | 381 USB_DIR_IN, 382 0x0012, 0x0000, len, 1, 383 LINE6_TIMEOUT * HZ); 384 if (ret < 0) { 385 dev_err(line6->ifcdev, 386 "receive length failed (error %d)\n", ret); 387 goto exit; 388 } 389 390 if (*len != 0xff) 391 break; 392 } 393 394 ret = -EIO; 395 if (*len == 0xff) { 396 dev_err(line6->ifcdev, "read failed after %d retries\n", 397 count); 398 goto exit; 399 } else if (*len != datalen) { 400 /* should be equal or something went wrong */ 401 dev_err(line6->ifcdev, 402 "length mismatch (expected %d, got %d)\n", 403 (int)datalen, (int)*len); 404 goto exit; 405 } 406 407 /* receive the result: */ 408 ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67, 409 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, 410 0x0013, 0x0000, data, datalen, 411 LINE6_TIMEOUT * HZ); 412 413 if (ret < 0) 414 dev_err(line6->ifcdev, "read failed (error %d)\n", ret); 415 416 exit: 417 kfree(len); 418 return ret; 419 } 420 EXPORT_SYMBOL_GPL(line6_read_data); 421 422 /* 423 Write data to device. 424 */ 425 int line6_write_data(struct usb_line6 *line6, unsigned address, void *data, 426 unsigned datalen) 427 { 428 struct usb_device *usbdev = line6->usbdev; 429 int ret; 430 unsigned char *status; 431 int count; 432 433 if (address > 0xffff || datalen > 0xffff) 434 return -EINVAL; 435 436 status = kmalloc(sizeof(*status), GFP_KERNEL); 437 if (!status) 438 return -ENOMEM; 439 440 ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67, 441 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, 442 0x0022, address, data, datalen, 443 LINE6_TIMEOUT * HZ); 444 445 if (ret < 0) { 446 dev_err(line6->ifcdev, 447 "write request failed (error %d)\n", ret); 448 goto exit; 449 } 450 451 for (count = 0; count < LINE6_READ_WRITE_MAX_RETRIES; count++) { 452 mdelay(LINE6_READ_WRITE_STATUS_DELAY); 453 454 ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 455 0x67, 456 USB_TYPE_VENDOR | USB_RECIP_DEVICE | 457 USB_DIR_IN, 458 0x0012, 0x0000, 459 status, 1, LINE6_TIMEOUT * HZ); 460 461 if (ret < 0) { 462 dev_err(line6->ifcdev, 463 "receiving status failed (error %d)\n", ret); 464 goto exit; 465 } 466 467 if (*status != 0xff) 468 break; 469 } 470 471 if (*status == 0xff) { 472 dev_err(line6->ifcdev, "write failed after %d retries\n", 473 count); 474 ret = -EIO; 475 } else if (*status != 0) { 476 dev_err(line6->ifcdev, "write failed (error %d)\n", ret); 477 ret = -EIO; 478 } 479 exit: 480 kfree(status); 481 return ret; 482 } 483 EXPORT_SYMBOL_GPL(line6_write_data); 484 485 /* 486 Read Line 6 device serial number. 487 (POD, TonePort, GuitarPort) 488 */ 489 int line6_read_serial_number(struct usb_line6 *line6, u32 *serial_number) 490 { 491 return line6_read_data(line6, 0x80d0, serial_number, 492 sizeof(*serial_number)); 493 } 494 EXPORT_SYMBOL_GPL(line6_read_serial_number); 495 496 /* 497 Card destructor. 498 */ 499 static void line6_destruct(struct snd_card *card) 500 { 501 struct usb_line6 *line6 = card->private_data; 502 struct usb_device *usbdev = line6->usbdev; 503 504 /* Free buffer memory first. We cannot depend on the existence of private 505 * data from the (podhd) module, it may be gone already during this call 506 */ 507 kfree(line6->buffer_message); 508 509 kfree(line6->buffer_listen); 510 511 /* then free URBs: */ 512 usb_free_urb(line6->urb_listen); 513 line6->urb_listen = NULL; 514 515 /* decrement reference counters: */ 516 usb_put_dev(usbdev); 517 } 518 519 static void line6_get_usb_properties(struct usb_line6 *line6) 520 { 521 struct usb_device *usbdev = line6->usbdev; 522 const struct line6_properties *properties = line6->properties; 523 int pipe; 524 struct usb_host_endpoint *ep = NULL; 525 526 if (properties->capabilities & LINE6_CAP_CONTROL) { 527 if (properties->capabilities & LINE6_CAP_CONTROL_MIDI) { 528 pipe = usb_rcvintpipe(line6->usbdev, 529 line6->properties->ep_ctrl_r); 530 } else { 531 pipe = usb_rcvbulkpipe(line6->usbdev, 532 line6->properties->ep_ctrl_r); 533 } 534 ep = usbdev->ep_in[usb_pipeendpoint(pipe)]; 535 } 536 537 /* Control data transfer properties */ 538 if (ep) { 539 line6->interval = ep->desc.bInterval; 540 line6->max_packet_size = le16_to_cpu(ep->desc.wMaxPacketSize); 541 } else { 542 if (properties->capabilities & LINE6_CAP_CONTROL) { 543 dev_err(line6->ifcdev, 544 "endpoint not available, using fallback values"); 545 } 546 line6->interval = LINE6_FALLBACK_INTERVAL; 547 line6->max_packet_size = LINE6_FALLBACK_MAXPACKETSIZE; 548 } 549 550 /* Isochronous transfer properties */ 551 if (usbdev->speed == USB_SPEED_LOW) { 552 line6->intervals_per_second = USB_LOW_INTERVALS_PER_SECOND; 553 line6->iso_buffers = USB_LOW_ISO_BUFFERS; 554 } else { 555 line6->intervals_per_second = USB_HIGH_INTERVALS_PER_SECOND; 556 line6->iso_buffers = USB_HIGH_ISO_BUFFERS; 557 } 558 } 559 560 /* Enable buffering of incoming messages, flush the buffer */ 561 static int line6_hwdep_open(struct snd_hwdep *hw, struct file *file) 562 { 563 struct usb_line6 *line6 = hw->private_data; 564 565 /* NOTE: hwdep layer provides atomicity here */ 566 567 line6->messages.active = 1; 568 569 return 0; 570 } 571 572 /* Stop buffering */ 573 static int line6_hwdep_release(struct snd_hwdep *hw, struct file *file) 574 { 575 struct usb_line6 *line6 = hw->private_data; 576 577 line6->messages.active = 0; 578 579 return 0; 580 } 581 582 /* Read from circular buffer, return to user */ 583 static long 584 line6_hwdep_read(struct snd_hwdep *hwdep, char __user *buf, long count, 585 loff_t *offset) 586 { 587 struct usb_line6 *line6 = hwdep->private_data; 588 long rv = 0; 589 unsigned int out_count; 590 591 if (mutex_lock_interruptible(&line6->messages.read_lock)) 592 return -ERESTARTSYS; 593 594 while (kfifo_len(&line6->messages.fifo) == 0) { 595 mutex_unlock(&line6->messages.read_lock); 596 597 rv = wait_event_interruptible( 598 line6->messages.wait_queue, 599 kfifo_len(&line6->messages.fifo) != 0); 600 if (rv < 0) 601 return rv; 602 603 if (mutex_lock_interruptible(&line6->messages.read_lock)) 604 return -ERESTARTSYS; 605 } 606 607 if (kfifo_peek_len(&line6->messages.fifo) > count) { 608 /* Buffer too small; allow re-read of the current item... */ 609 rv = -EINVAL; 610 } else { 611 rv = kfifo_to_user(&line6->messages.fifo, buf, count, &out_count); 612 if (rv == 0) 613 rv = out_count; 614 } 615 616 mutex_unlock(&line6->messages.read_lock); 617 return rv; 618 } 619 620 /* Write directly (no buffering) to device by user*/ 621 static long 622 line6_hwdep_write(struct snd_hwdep *hwdep, const char __user *data, long count, 623 loff_t *offset) 624 { 625 struct usb_line6 *line6 = hwdep->private_data; 626 int rv; 627 char *data_copy; 628 629 if (count > line6->max_packet_size * LINE6_RAW_MESSAGES_MAXCOUNT) { 630 /* This is an arbitrary limit - still better than nothing... */ 631 return -EINVAL; 632 } 633 634 data_copy = memdup_user(data, count); 635 if (IS_ERR(data_copy)) 636 return PTR_ERR(data_copy); 637 638 rv = line6_send_raw_message(line6, data_copy, count); 639 640 kfree(data_copy); 641 return rv; 642 } 643 644 static const struct snd_hwdep_ops hwdep_ops = { 645 .open = line6_hwdep_open, 646 .release = line6_hwdep_release, 647 .read = line6_hwdep_read, 648 .write = line6_hwdep_write, 649 }; 650 651 /* Insert into circular buffer */ 652 static void line6_hwdep_push_message(struct usb_line6 *line6) 653 { 654 if (!line6->messages.active) 655 return; 656 657 if (kfifo_avail(&line6->messages.fifo) >= line6->message_length) { 658 /* No race condition here, there's only one writer */ 659 kfifo_in(&line6->messages.fifo, 660 line6->buffer_message, line6->message_length); 661 } /* else TODO: signal overflow */ 662 663 wake_up_interruptible(&line6->messages.wait_queue); 664 } 665 666 static int line6_hwdep_init(struct usb_line6 *line6) 667 { 668 int err; 669 struct snd_hwdep *hwdep; 670 671 /* TODO: usb_driver_claim_interface(); */ 672 line6->process_message = line6_hwdep_push_message; 673 line6->messages.active = 0; 674 init_waitqueue_head(&line6->messages.wait_queue); 675 mutex_init(&line6->messages.read_lock); 676 INIT_KFIFO(line6->messages.fifo); 677 678 err = snd_hwdep_new(line6->card, "config", 0, &hwdep); 679 if (err < 0) 680 goto end; 681 strcpy(hwdep->name, "config"); 682 hwdep->iface = SNDRV_HWDEP_IFACE_LINE6; 683 hwdep->ops = hwdep_ops; 684 hwdep->private_data = line6; 685 hwdep->exclusive = true; 686 687 end: 688 return err; 689 } 690 691 static int line6_init_cap_control(struct usb_line6 *line6) 692 { 693 int ret; 694 695 /* initialize USB buffers: */ 696 line6->buffer_listen = kmalloc(LINE6_BUFSIZE_LISTEN, GFP_KERNEL); 697 if (!line6->buffer_listen) 698 return -ENOMEM; 699 700 line6->urb_listen = usb_alloc_urb(0, GFP_KERNEL); 701 if (!line6->urb_listen) 702 return -ENOMEM; 703 704 if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) { 705 line6->buffer_message = kmalloc(LINE6_MIDI_MESSAGE_MAXLEN, GFP_KERNEL); 706 if (!line6->buffer_message) 707 return -ENOMEM; 708 } else { 709 ret = line6_hwdep_init(line6); 710 if (ret < 0) 711 return ret; 712 } 713 714 ret = line6_start_listen(line6); 715 if (ret < 0) { 716 dev_err(line6->ifcdev, "cannot start listening: %d\n", ret); 717 return ret; 718 } 719 720 return 0; 721 } 722 723 /* 724 Probe USB device. 725 */ 726 int line6_probe(struct usb_interface *interface, 727 const struct usb_device_id *id, 728 const char *driver_name, 729 const struct line6_properties *properties, 730 int (*private_init)(struct usb_line6 *, const struct usb_device_id *id), 731 size_t data_size) 732 { 733 struct usb_device *usbdev = interface_to_usbdev(interface); 734 struct snd_card *card; 735 struct usb_line6 *line6; 736 int interface_number; 737 int ret; 738 739 if (WARN_ON(data_size < sizeof(*line6))) 740 return -EINVAL; 741 742 /* we don't handle multiple configurations */ 743 if (usbdev->descriptor.bNumConfigurations != 1) 744 return -ENODEV; 745 746 ret = snd_card_new(&interface->dev, 747 SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, 748 THIS_MODULE, data_size, &card); 749 if (ret < 0) 750 return ret; 751 752 /* store basic data: */ 753 line6 = card->private_data; 754 line6->card = card; 755 line6->properties = properties; 756 line6->usbdev = usbdev; 757 line6->ifcdev = &interface->dev; 758 759 strcpy(card->id, properties->id); 760 strcpy(card->driver, driver_name); 761 strcpy(card->shortname, properties->name); 762 sprintf(card->longname, "Line 6 %s at USB %s", properties->name, 763 dev_name(line6->ifcdev)); 764 card->private_free = line6_destruct; 765 766 usb_set_intfdata(interface, line6); 767 768 /* increment reference counters: */ 769 usb_get_dev(usbdev); 770 771 /* initialize device info: */ 772 dev_info(&interface->dev, "Line 6 %s found\n", properties->name); 773 774 /* query interface number */ 775 interface_number = interface->cur_altsetting->desc.bInterfaceNumber; 776 777 /* TODO reserves the bus bandwidth even without actual transfer */ 778 ret = usb_set_interface(usbdev, interface_number, 779 properties->altsetting); 780 if (ret < 0) { 781 dev_err(&interface->dev, "set_interface failed\n"); 782 goto error; 783 } 784 785 line6_get_usb_properties(line6); 786 787 if (properties->capabilities & LINE6_CAP_CONTROL) { 788 ret = line6_init_cap_control(line6); 789 if (ret < 0) 790 goto error; 791 } 792 793 /* initialize device data based on device: */ 794 ret = private_init(line6, id); 795 if (ret < 0) 796 goto error; 797 798 /* creation of additional special files should go here */ 799 800 dev_info(&interface->dev, "Line 6 %s now attached\n", 801 properties->name); 802 803 return 0; 804 805 error: 806 /* we can call disconnect callback here because no close-sync is 807 * needed yet at this point 808 */ 809 line6_disconnect(interface); 810 return ret; 811 } 812 EXPORT_SYMBOL_GPL(line6_probe); 813 814 /* 815 Line 6 device disconnected. 816 */ 817 void line6_disconnect(struct usb_interface *interface) 818 { 819 struct usb_line6 *line6 = usb_get_intfdata(interface); 820 struct usb_device *usbdev = interface_to_usbdev(interface); 821 822 if (!line6) 823 return; 824 825 if (WARN_ON(usbdev != line6->usbdev)) 826 return; 827 828 if (line6->urb_listen != NULL) 829 line6_stop_listen(line6); 830 831 snd_card_disconnect(line6->card); 832 if (line6->line6pcm) 833 line6_pcm_disconnect(line6->line6pcm); 834 if (line6->disconnect) 835 line6->disconnect(line6); 836 837 dev_info(&interface->dev, "Line 6 %s now disconnected\n", 838 line6->properties->name); 839 840 /* make sure the device isn't destructed twice: */ 841 usb_set_intfdata(interface, NULL); 842 843 snd_card_free_when_closed(line6->card); 844 } 845 EXPORT_SYMBOL_GPL(line6_disconnect); 846 847 #ifdef CONFIG_PM 848 849 /* 850 Suspend Line 6 device. 851 */ 852 int line6_suspend(struct usb_interface *interface, pm_message_t message) 853 { 854 struct usb_line6 *line6 = usb_get_intfdata(interface); 855 struct snd_line6_pcm *line6pcm = line6->line6pcm; 856 857 snd_power_change_state(line6->card, SNDRV_CTL_POWER_D3hot); 858 859 if (line6->properties->capabilities & LINE6_CAP_CONTROL) 860 line6_stop_listen(line6); 861 862 if (line6pcm != NULL) 863 line6pcm->flags = 0; 864 865 return 0; 866 } 867 EXPORT_SYMBOL_GPL(line6_suspend); 868 869 /* 870 Resume Line 6 device. 871 */ 872 int line6_resume(struct usb_interface *interface) 873 { 874 struct usb_line6 *line6 = usb_get_intfdata(interface); 875 876 if (line6->properties->capabilities & LINE6_CAP_CONTROL) 877 line6_start_listen(line6); 878 879 snd_power_change_state(line6->card, SNDRV_CTL_POWER_D0); 880 return 0; 881 } 882 EXPORT_SYMBOL_GPL(line6_resume); 883 884 #endif /* CONFIG_PM */ 885 886 MODULE_AUTHOR(DRIVER_AUTHOR); 887 MODULE_DESCRIPTION(DRIVER_DESC); 888 MODULE_LICENSE("GPL"); 889 890