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