1 /* 2 * usbmidi.c - ALSA USB MIDI driver 3 * 4 * Copyright (c) 2002-2009 Clemens Ladisch 5 * All rights reserved. 6 * 7 * Based on the OSS usb-midi driver by NAGANO Daisuke, 8 * NetBSD's umidi driver by Takuya SHIOZAKI, 9 * the "USB Device Class Definition for MIDI Devices" by Roland 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * Alternatively, this software may be distributed and/or modified under the 21 * terms of the GNU General Public License as published by the Free Software 22 * Foundation; either version 2 of the License, or (at your option) any later 23 * version. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 29 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38 #include <linux/kernel.h> 39 #include <linux/types.h> 40 #include <linux/bitops.h> 41 #include <linux/interrupt.h> 42 #include <linux/spinlock.h> 43 #include <linux/string.h> 44 #include <linux/init.h> 45 #include <linux/slab.h> 46 #include <linux/timer.h> 47 #include <linux/usb.h> 48 #include <linux/wait.h> 49 #include <linux/usb/audio.h> 50 #include <linux/module.h> 51 52 #include <sound/core.h> 53 #include <sound/control.h> 54 #include <sound/rawmidi.h> 55 #include <sound/asequencer.h> 56 #include "usbaudio.h" 57 #include "midi.h" 58 #include "power.h" 59 #include "helper.h" 60 61 /* 62 * define this to log all USB packets 63 */ 64 /* #define DUMP_PACKETS */ 65 66 /* 67 * how long to wait after some USB errors, so that hub_wq can disconnect() us 68 * without too many spurious errors 69 */ 70 #define ERROR_DELAY_JIFFIES (HZ / 10) 71 72 #define OUTPUT_URBS 7 73 #define INPUT_URBS 7 74 75 76 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>"); 77 MODULE_DESCRIPTION("USB Audio/MIDI helper module"); 78 MODULE_LICENSE("Dual BSD/GPL"); 79 80 81 struct usb_ms_header_descriptor { 82 __u8 bLength; 83 __u8 bDescriptorType; 84 __u8 bDescriptorSubtype; 85 __u8 bcdMSC[2]; 86 __le16 wTotalLength; 87 } __attribute__ ((packed)); 88 89 struct usb_ms_endpoint_descriptor { 90 __u8 bLength; 91 __u8 bDescriptorType; 92 __u8 bDescriptorSubtype; 93 __u8 bNumEmbMIDIJack; 94 __u8 baAssocJackID[0]; 95 } __attribute__ ((packed)); 96 97 struct snd_usb_midi_in_endpoint; 98 struct snd_usb_midi_out_endpoint; 99 struct snd_usb_midi_endpoint; 100 101 struct usb_protocol_ops { 102 void (*input)(struct snd_usb_midi_in_endpoint*, uint8_t*, int); 103 void (*output)(struct snd_usb_midi_out_endpoint *ep, struct urb *urb); 104 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t); 105 void (*init_out_endpoint)(struct snd_usb_midi_out_endpoint *); 106 void (*finish_out_endpoint)(struct snd_usb_midi_out_endpoint *); 107 }; 108 109 struct snd_usb_midi { 110 struct usb_device *dev; 111 struct snd_card *card; 112 struct usb_interface *iface; 113 const struct snd_usb_audio_quirk *quirk; 114 struct snd_rawmidi *rmidi; 115 struct usb_protocol_ops *usb_protocol_ops; 116 struct list_head list; 117 struct timer_list error_timer; 118 spinlock_t disc_lock; 119 struct rw_semaphore disc_rwsem; 120 struct mutex mutex; 121 u32 usb_id; 122 int next_midi_device; 123 124 struct snd_usb_midi_endpoint { 125 struct snd_usb_midi_out_endpoint *out; 126 struct snd_usb_midi_in_endpoint *in; 127 } endpoints[MIDI_MAX_ENDPOINTS]; 128 unsigned long input_triggered; 129 unsigned int opened[2]; 130 unsigned char disconnected; 131 unsigned char input_running; 132 133 struct snd_kcontrol *roland_load_ctl; 134 }; 135 136 struct snd_usb_midi_out_endpoint { 137 struct snd_usb_midi *umidi; 138 struct out_urb_context { 139 struct urb *urb; 140 struct snd_usb_midi_out_endpoint *ep; 141 } urbs[OUTPUT_URBS]; 142 unsigned int active_urbs; 143 unsigned int drain_urbs; 144 int max_transfer; /* size of urb buffer */ 145 struct tasklet_struct tasklet; 146 unsigned int next_urb; 147 spinlock_t buffer_lock; 148 149 struct usbmidi_out_port { 150 struct snd_usb_midi_out_endpoint *ep; 151 struct snd_rawmidi_substream *substream; 152 int active; 153 uint8_t cable; /* cable number << 4 */ 154 uint8_t state; 155 #define STATE_UNKNOWN 0 156 #define STATE_1PARAM 1 157 #define STATE_2PARAM_1 2 158 #define STATE_2PARAM_2 3 159 #define STATE_SYSEX_0 4 160 #define STATE_SYSEX_1 5 161 #define STATE_SYSEX_2 6 162 uint8_t data[2]; 163 } ports[0x10]; 164 int current_port; 165 166 wait_queue_head_t drain_wait; 167 }; 168 169 struct snd_usb_midi_in_endpoint { 170 struct snd_usb_midi *umidi; 171 struct urb *urbs[INPUT_URBS]; 172 struct usbmidi_in_port { 173 struct snd_rawmidi_substream *substream; 174 u8 running_status_length; 175 } ports[0x10]; 176 u8 seen_f5; 177 u8 error_resubmit; 178 int current_port; 179 }; 180 181 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep); 182 183 static const uint8_t snd_usbmidi_cin_length[] = { 184 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1 185 }; 186 187 /* 188 * Submits the URB, with error handling. 189 */ 190 static int snd_usbmidi_submit_urb(struct urb *urb, gfp_t flags) 191 { 192 int err = usb_submit_urb(urb, flags); 193 if (err < 0 && err != -ENODEV) 194 dev_err(&urb->dev->dev, "usb_submit_urb: %d\n", err); 195 return err; 196 } 197 198 /* 199 * Error handling for URB completion functions. 200 */ 201 static int snd_usbmidi_urb_error(const struct urb *urb) 202 { 203 switch (urb->status) { 204 /* manually unlinked, or device gone */ 205 case -ENOENT: 206 case -ECONNRESET: 207 case -ESHUTDOWN: 208 case -ENODEV: 209 return -ENODEV; 210 /* errors that might occur during unplugging */ 211 case -EPROTO: 212 case -ETIME: 213 case -EILSEQ: 214 return -EIO; 215 default: 216 dev_err(&urb->dev->dev, "urb status %d\n", urb->status); 217 return 0; /* continue */ 218 } 219 } 220 221 /* 222 * Receives a chunk of MIDI data. 223 */ 224 static void snd_usbmidi_input_data(struct snd_usb_midi_in_endpoint *ep, 225 int portidx, uint8_t *data, int length) 226 { 227 struct usbmidi_in_port *port = &ep->ports[portidx]; 228 229 if (!port->substream) { 230 dev_dbg(&ep->umidi->dev->dev, "unexpected port %d!\n", portidx); 231 return; 232 } 233 if (!test_bit(port->substream->number, &ep->umidi->input_triggered)) 234 return; 235 snd_rawmidi_receive(port->substream, data, length); 236 } 237 238 #ifdef DUMP_PACKETS 239 static void dump_urb(const char *type, const u8 *data, int length) 240 { 241 snd_printk(KERN_DEBUG "%s packet: [", type); 242 for (; length > 0; ++data, --length) 243 printk(" %02x", *data); 244 printk(" ]\n"); 245 } 246 #else 247 #define dump_urb(type, data, length) /* nothing */ 248 #endif 249 250 /* 251 * Processes the data read from the device. 252 */ 253 static void snd_usbmidi_in_urb_complete(struct urb *urb) 254 { 255 struct snd_usb_midi_in_endpoint *ep = urb->context; 256 257 if (urb->status == 0) { 258 dump_urb("received", urb->transfer_buffer, urb->actual_length); 259 ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer, 260 urb->actual_length); 261 } else { 262 int err = snd_usbmidi_urb_error(urb); 263 if (err < 0) { 264 if (err != -ENODEV) { 265 ep->error_resubmit = 1; 266 mod_timer(&ep->umidi->error_timer, 267 jiffies + ERROR_DELAY_JIFFIES); 268 } 269 return; 270 } 271 } 272 273 urb->dev = ep->umidi->dev; 274 snd_usbmidi_submit_urb(urb, GFP_ATOMIC); 275 } 276 277 static void snd_usbmidi_out_urb_complete(struct urb *urb) 278 { 279 struct out_urb_context *context = urb->context; 280 struct snd_usb_midi_out_endpoint *ep = context->ep; 281 unsigned int urb_index; 282 283 spin_lock(&ep->buffer_lock); 284 urb_index = context - ep->urbs; 285 ep->active_urbs &= ~(1 << urb_index); 286 if (unlikely(ep->drain_urbs)) { 287 ep->drain_urbs &= ~(1 << urb_index); 288 wake_up(&ep->drain_wait); 289 } 290 spin_unlock(&ep->buffer_lock); 291 if (urb->status < 0) { 292 int err = snd_usbmidi_urb_error(urb); 293 if (err < 0) { 294 if (err != -ENODEV) 295 mod_timer(&ep->umidi->error_timer, 296 jiffies + ERROR_DELAY_JIFFIES); 297 return; 298 } 299 } 300 snd_usbmidi_do_output(ep); 301 } 302 303 /* 304 * This is called when some data should be transferred to the device 305 * (from one or more substreams). 306 */ 307 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep) 308 { 309 unsigned int urb_index; 310 struct urb *urb; 311 unsigned long flags; 312 313 spin_lock_irqsave(&ep->buffer_lock, flags); 314 if (ep->umidi->disconnected) { 315 spin_unlock_irqrestore(&ep->buffer_lock, flags); 316 return; 317 } 318 319 urb_index = ep->next_urb; 320 for (;;) { 321 if (!(ep->active_urbs & (1 << urb_index))) { 322 urb = ep->urbs[urb_index].urb; 323 urb->transfer_buffer_length = 0; 324 ep->umidi->usb_protocol_ops->output(ep, urb); 325 if (urb->transfer_buffer_length == 0) 326 break; 327 328 dump_urb("sending", urb->transfer_buffer, 329 urb->transfer_buffer_length); 330 urb->dev = ep->umidi->dev; 331 if (snd_usbmidi_submit_urb(urb, GFP_ATOMIC) < 0) 332 break; 333 ep->active_urbs |= 1 << urb_index; 334 } 335 if (++urb_index >= OUTPUT_URBS) 336 urb_index = 0; 337 if (urb_index == ep->next_urb) 338 break; 339 } 340 ep->next_urb = urb_index; 341 spin_unlock_irqrestore(&ep->buffer_lock, flags); 342 } 343 344 static void snd_usbmidi_out_tasklet(unsigned long data) 345 { 346 struct snd_usb_midi_out_endpoint *ep = 347 (struct snd_usb_midi_out_endpoint *) data; 348 349 snd_usbmidi_do_output(ep); 350 } 351 352 /* called after transfers had been interrupted due to some USB error */ 353 static void snd_usbmidi_error_timer(unsigned long data) 354 { 355 struct snd_usb_midi *umidi = (struct snd_usb_midi *)data; 356 unsigned int i, j; 357 358 spin_lock(&umidi->disc_lock); 359 if (umidi->disconnected) { 360 spin_unlock(&umidi->disc_lock); 361 return; 362 } 363 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 364 struct snd_usb_midi_in_endpoint *in = umidi->endpoints[i].in; 365 if (in && in->error_resubmit) { 366 in->error_resubmit = 0; 367 for (j = 0; j < INPUT_URBS; ++j) { 368 if (atomic_read(&in->urbs[j]->use_count)) 369 continue; 370 in->urbs[j]->dev = umidi->dev; 371 snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC); 372 } 373 } 374 if (umidi->endpoints[i].out) 375 snd_usbmidi_do_output(umidi->endpoints[i].out); 376 } 377 spin_unlock(&umidi->disc_lock); 378 } 379 380 /* helper function to send static data that may not DMA-able */ 381 static int send_bulk_static_data(struct snd_usb_midi_out_endpoint *ep, 382 const void *data, int len) 383 { 384 int err = 0; 385 void *buf = kmemdup(data, len, GFP_KERNEL); 386 if (!buf) 387 return -ENOMEM; 388 dump_urb("sending", buf, len); 389 if (ep->urbs[0].urb) 390 err = usb_bulk_msg(ep->umidi->dev, ep->urbs[0].urb->pipe, 391 buf, len, NULL, 250); 392 kfree(buf); 393 return err; 394 } 395 396 /* 397 * Standard USB MIDI protocol: see the spec. 398 * Midiman protocol: like the standard protocol, but the control byte is the 399 * fourth byte in each packet, and uses length instead of CIN. 400 */ 401 402 static void snd_usbmidi_standard_input(struct snd_usb_midi_in_endpoint *ep, 403 uint8_t *buffer, int buffer_length) 404 { 405 int i; 406 407 for (i = 0; i + 3 < buffer_length; i += 4) 408 if (buffer[i] != 0) { 409 int cable = buffer[i] >> 4; 410 int length = snd_usbmidi_cin_length[buffer[i] & 0x0f]; 411 snd_usbmidi_input_data(ep, cable, &buffer[i + 1], 412 length); 413 } 414 } 415 416 static void snd_usbmidi_midiman_input(struct snd_usb_midi_in_endpoint *ep, 417 uint8_t *buffer, int buffer_length) 418 { 419 int i; 420 421 for (i = 0; i + 3 < buffer_length; i += 4) 422 if (buffer[i + 3] != 0) { 423 int port = buffer[i + 3] >> 4; 424 int length = buffer[i + 3] & 3; 425 snd_usbmidi_input_data(ep, port, &buffer[i], length); 426 } 427 } 428 429 /* 430 * Buggy M-Audio device: running status on input results in a packet that has 431 * the data bytes but not the status byte and that is marked with CIN 4. 432 */ 433 static void snd_usbmidi_maudio_broken_running_status_input( 434 struct snd_usb_midi_in_endpoint *ep, 435 uint8_t *buffer, int buffer_length) 436 { 437 int i; 438 439 for (i = 0; i + 3 < buffer_length; i += 4) 440 if (buffer[i] != 0) { 441 int cable = buffer[i] >> 4; 442 u8 cin = buffer[i] & 0x0f; 443 struct usbmidi_in_port *port = &ep->ports[cable]; 444 int length; 445 446 length = snd_usbmidi_cin_length[cin]; 447 if (cin == 0xf && buffer[i + 1] >= 0xf8) 448 ; /* realtime msg: no running status change */ 449 else if (cin >= 0x8 && cin <= 0xe) 450 /* channel msg */ 451 port->running_status_length = length - 1; 452 else if (cin == 0x4 && 453 port->running_status_length != 0 && 454 buffer[i + 1] < 0x80) 455 /* CIN 4 that is not a SysEx */ 456 length = port->running_status_length; 457 else 458 /* 459 * All other msgs cannot begin running status. 460 * (A channel msg sent as two or three CIN 0xF 461 * packets could in theory, but this device 462 * doesn't use this format.) 463 */ 464 port->running_status_length = 0; 465 snd_usbmidi_input_data(ep, cable, &buffer[i + 1], 466 length); 467 } 468 } 469 470 /* 471 * CME protocol: like the standard protocol, but SysEx commands are sent as a 472 * single USB packet preceded by a 0x0F byte. 473 */ 474 static void snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint *ep, 475 uint8_t *buffer, int buffer_length) 476 { 477 if (buffer_length < 2 || (buffer[0] & 0x0f) != 0x0f) 478 snd_usbmidi_standard_input(ep, buffer, buffer_length); 479 else 480 snd_usbmidi_input_data(ep, buffer[0] >> 4, 481 &buffer[1], buffer_length - 1); 482 } 483 484 /* 485 * Adds one USB MIDI packet to the output buffer. 486 */ 487 static void snd_usbmidi_output_standard_packet(struct urb *urb, uint8_t p0, 488 uint8_t p1, uint8_t p2, 489 uint8_t p3) 490 { 491 492 uint8_t *buf = 493 (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length; 494 buf[0] = p0; 495 buf[1] = p1; 496 buf[2] = p2; 497 buf[3] = p3; 498 urb->transfer_buffer_length += 4; 499 } 500 501 /* 502 * Adds one Midiman packet to the output buffer. 503 */ 504 static void snd_usbmidi_output_midiman_packet(struct urb *urb, uint8_t p0, 505 uint8_t p1, uint8_t p2, 506 uint8_t p3) 507 { 508 509 uint8_t *buf = 510 (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length; 511 buf[0] = p1; 512 buf[1] = p2; 513 buf[2] = p3; 514 buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f]; 515 urb->transfer_buffer_length += 4; 516 } 517 518 /* 519 * Converts MIDI commands to USB MIDI packets. 520 */ 521 static void snd_usbmidi_transmit_byte(struct usbmidi_out_port *port, 522 uint8_t b, struct urb *urb) 523 { 524 uint8_t p0 = port->cable; 525 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) = 526 port->ep->umidi->usb_protocol_ops->output_packet; 527 528 if (b >= 0xf8) { 529 output_packet(urb, p0 | 0x0f, b, 0, 0); 530 } else if (b >= 0xf0) { 531 switch (b) { 532 case 0xf0: 533 port->data[0] = b; 534 port->state = STATE_SYSEX_1; 535 break; 536 case 0xf1: 537 case 0xf3: 538 port->data[0] = b; 539 port->state = STATE_1PARAM; 540 break; 541 case 0xf2: 542 port->data[0] = b; 543 port->state = STATE_2PARAM_1; 544 break; 545 case 0xf4: 546 case 0xf5: 547 port->state = STATE_UNKNOWN; 548 break; 549 case 0xf6: 550 output_packet(urb, p0 | 0x05, 0xf6, 0, 0); 551 port->state = STATE_UNKNOWN; 552 break; 553 case 0xf7: 554 switch (port->state) { 555 case STATE_SYSEX_0: 556 output_packet(urb, p0 | 0x05, 0xf7, 0, 0); 557 break; 558 case STATE_SYSEX_1: 559 output_packet(urb, p0 | 0x06, port->data[0], 560 0xf7, 0); 561 break; 562 case STATE_SYSEX_2: 563 output_packet(urb, p0 | 0x07, port->data[0], 564 port->data[1], 0xf7); 565 break; 566 } 567 port->state = STATE_UNKNOWN; 568 break; 569 } 570 } else if (b >= 0x80) { 571 port->data[0] = b; 572 if (b >= 0xc0 && b <= 0xdf) 573 port->state = STATE_1PARAM; 574 else 575 port->state = STATE_2PARAM_1; 576 } else { /* b < 0x80 */ 577 switch (port->state) { 578 case STATE_1PARAM: 579 if (port->data[0] < 0xf0) { 580 p0 |= port->data[0] >> 4; 581 } else { 582 p0 |= 0x02; 583 port->state = STATE_UNKNOWN; 584 } 585 output_packet(urb, p0, port->data[0], b, 0); 586 break; 587 case STATE_2PARAM_1: 588 port->data[1] = b; 589 port->state = STATE_2PARAM_2; 590 break; 591 case STATE_2PARAM_2: 592 if (port->data[0] < 0xf0) { 593 p0 |= port->data[0] >> 4; 594 port->state = STATE_2PARAM_1; 595 } else { 596 p0 |= 0x03; 597 port->state = STATE_UNKNOWN; 598 } 599 output_packet(urb, p0, port->data[0], port->data[1], b); 600 break; 601 case STATE_SYSEX_0: 602 port->data[0] = b; 603 port->state = STATE_SYSEX_1; 604 break; 605 case STATE_SYSEX_1: 606 port->data[1] = b; 607 port->state = STATE_SYSEX_2; 608 break; 609 case STATE_SYSEX_2: 610 output_packet(urb, p0 | 0x04, port->data[0], 611 port->data[1], b); 612 port->state = STATE_SYSEX_0; 613 break; 614 } 615 } 616 } 617 618 static void snd_usbmidi_standard_output(struct snd_usb_midi_out_endpoint *ep, 619 struct urb *urb) 620 { 621 int p; 622 623 /* FIXME: lower-numbered ports can starve higher-numbered ports */ 624 for (p = 0; p < 0x10; ++p) { 625 struct usbmidi_out_port *port = &ep->ports[p]; 626 if (!port->active) 627 continue; 628 while (urb->transfer_buffer_length + 3 < ep->max_transfer) { 629 uint8_t b; 630 if (snd_rawmidi_transmit(port->substream, &b, 1) != 1) { 631 port->active = 0; 632 break; 633 } 634 snd_usbmidi_transmit_byte(port, b, urb); 635 } 636 } 637 } 638 639 static struct usb_protocol_ops snd_usbmidi_standard_ops = { 640 .input = snd_usbmidi_standard_input, 641 .output = snd_usbmidi_standard_output, 642 .output_packet = snd_usbmidi_output_standard_packet, 643 }; 644 645 static struct usb_protocol_ops snd_usbmidi_midiman_ops = { 646 .input = snd_usbmidi_midiman_input, 647 .output = snd_usbmidi_standard_output, 648 .output_packet = snd_usbmidi_output_midiman_packet, 649 }; 650 651 static struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = { 652 .input = snd_usbmidi_maudio_broken_running_status_input, 653 .output = snd_usbmidi_standard_output, 654 .output_packet = snd_usbmidi_output_standard_packet, 655 }; 656 657 static struct usb_protocol_ops snd_usbmidi_cme_ops = { 658 .input = snd_usbmidi_cme_input, 659 .output = snd_usbmidi_standard_output, 660 .output_packet = snd_usbmidi_output_standard_packet, 661 }; 662 663 /* 664 * AKAI MPD16 protocol: 665 * 666 * For control port (endpoint 1): 667 * ============================== 668 * One or more chunks consisting of first byte of (0x10 | msg_len) and then a 669 * SysEx message (msg_len=9 bytes long). 670 * 671 * For data port (endpoint 2): 672 * =========================== 673 * One or more chunks consisting of first byte of (0x20 | msg_len) and then a 674 * MIDI message (msg_len bytes long) 675 * 676 * Messages sent: Active Sense, Note On, Poly Pressure, Control Change. 677 */ 678 static void snd_usbmidi_akai_input(struct snd_usb_midi_in_endpoint *ep, 679 uint8_t *buffer, int buffer_length) 680 { 681 unsigned int pos = 0; 682 unsigned int len = (unsigned int)buffer_length; 683 while (pos < len) { 684 unsigned int port = (buffer[pos] >> 4) - 1; 685 unsigned int msg_len = buffer[pos] & 0x0f; 686 pos++; 687 if (pos + msg_len <= len && port < 2) 688 snd_usbmidi_input_data(ep, 0, &buffer[pos], msg_len); 689 pos += msg_len; 690 } 691 } 692 693 #define MAX_AKAI_SYSEX_LEN 9 694 695 static void snd_usbmidi_akai_output(struct snd_usb_midi_out_endpoint *ep, 696 struct urb *urb) 697 { 698 uint8_t *msg; 699 int pos, end, count, buf_end; 700 uint8_t tmp[MAX_AKAI_SYSEX_LEN]; 701 struct snd_rawmidi_substream *substream = ep->ports[0].substream; 702 703 if (!ep->ports[0].active) 704 return; 705 706 msg = urb->transfer_buffer + urb->transfer_buffer_length; 707 buf_end = ep->max_transfer - MAX_AKAI_SYSEX_LEN - 1; 708 709 /* only try adding more data when there's space for at least 1 SysEx */ 710 while (urb->transfer_buffer_length < buf_end) { 711 count = snd_rawmidi_transmit_peek(substream, 712 tmp, MAX_AKAI_SYSEX_LEN); 713 if (!count) { 714 ep->ports[0].active = 0; 715 return; 716 } 717 /* try to skip non-SysEx data */ 718 for (pos = 0; pos < count && tmp[pos] != 0xF0; pos++) 719 ; 720 721 if (pos > 0) { 722 snd_rawmidi_transmit_ack(substream, pos); 723 continue; 724 } 725 726 /* look for the start or end marker */ 727 for (end = 1; end < count && tmp[end] < 0xF0; end++) 728 ; 729 730 /* next SysEx started before the end of current one */ 731 if (end < count && tmp[end] == 0xF0) { 732 /* it's incomplete - drop it */ 733 snd_rawmidi_transmit_ack(substream, end); 734 continue; 735 } 736 /* SysEx complete */ 737 if (end < count && tmp[end] == 0xF7) { 738 /* queue it, ack it, and get the next one */ 739 count = end + 1; 740 msg[0] = 0x10 | count; 741 memcpy(&msg[1], tmp, count); 742 snd_rawmidi_transmit_ack(substream, count); 743 urb->transfer_buffer_length += count + 1; 744 msg += count + 1; 745 continue; 746 } 747 /* less than 9 bytes and no end byte - wait for more */ 748 if (count < MAX_AKAI_SYSEX_LEN) { 749 ep->ports[0].active = 0; 750 return; 751 } 752 /* 9 bytes and no end marker in sight - malformed, skip it */ 753 snd_rawmidi_transmit_ack(substream, count); 754 } 755 } 756 757 static struct usb_protocol_ops snd_usbmidi_akai_ops = { 758 .input = snd_usbmidi_akai_input, 759 .output = snd_usbmidi_akai_output, 760 }; 761 762 /* 763 * Novation USB MIDI protocol: number of data bytes is in the first byte 764 * (when receiving) (+1!) or in the second byte (when sending); data begins 765 * at the third byte. 766 */ 767 768 static void snd_usbmidi_novation_input(struct snd_usb_midi_in_endpoint *ep, 769 uint8_t *buffer, int buffer_length) 770 { 771 if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1) 772 return; 773 snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1); 774 } 775 776 static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint *ep, 777 struct urb *urb) 778 { 779 uint8_t *transfer_buffer; 780 int count; 781 782 if (!ep->ports[0].active) 783 return; 784 transfer_buffer = urb->transfer_buffer; 785 count = snd_rawmidi_transmit(ep->ports[0].substream, 786 &transfer_buffer[2], 787 ep->max_transfer - 2); 788 if (count < 1) { 789 ep->ports[0].active = 0; 790 return; 791 } 792 transfer_buffer[0] = 0; 793 transfer_buffer[1] = count; 794 urb->transfer_buffer_length = 2 + count; 795 } 796 797 static struct usb_protocol_ops snd_usbmidi_novation_ops = { 798 .input = snd_usbmidi_novation_input, 799 .output = snd_usbmidi_novation_output, 800 }; 801 802 /* 803 * "raw" protocol: just move raw MIDI bytes from/to the endpoint 804 */ 805 806 static void snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint *ep, 807 uint8_t *buffer, int buffer_length) 808 { 809 snd_usbmidi_input_data(ep, 0, buffer, buffer_length); 810 } 811 812 static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint *ep, 813 struct urb *urb) 814 { 815 int count; 816 817 if (!ep->ports[0].active) 818 return; 819 count = snd_rawmidi_transmit(ep->ports[0].substream, 820 urb->transfer_buffer, 821 ep->max_transfer); 822 if (count < 1) { 823 ep->ports[0].active = 0; 824 return; 825 } 826 urb->transfer_buffer_length = count; 827 } 828 829 static struct usb_protocol_ops snd_usbmidi_raw_ops = { 830 .input = snd_usbmidi_raw_input, 831 .output = snd_usbmidi_raw_output, 832 }; 833 834 /* 835 * FTDI protocol: raw MIDI bytes, but input packets have two modem status bytes. 836 */ 837 838 static void snd_usbmidi_ftdi_input(struct snd_usb_midi_in_endpoint *ep, 839 uint8_t *buffer, int buffer_length) 840 { 841 if (buffer_length > 2) 842 snd_usbmidi_input_data(ep, 0, buffer + 2, buffer_length - 2); 843 } 844 845 static struct usb_protocol_ops snd_usbmidi_ftdi_ops = { 846 .input = snd_usbmidi_ftdi_input, 847 .output = snd_usbmidi_raw_output, 848 }; 849 850 static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep, 851 uint8_t *buffer, int buffer_length) 852 { 853 if (buffer_length != 9) 854 return; 855 buffer_length = 8; 856 while (buffer_length && buffer[buffer_length - 1] == 0xFD) 857 buffer_length--; 858 if (buffer_length) 859 snd_usbmidi_input_data(ep, 0, buffer, buffer_length); 860 } 861 862 static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep, 863 struct urb *urb) 864 { 865 int count; 866 867 if (!ep->ports[0].active) 868 return; 869 switch (snd_usb_get_speed(ep->umidi->dev)) { 870 case USB_SPEED_HIGH: 871 case USB_SPEED_SUPER: 872 count = 1; 873 break; 874 default: 875 count = 2; 876 } 877 count = snd_rawmidi_transmit(ep->ports[0].substream, 878 urb->transfer_buffer, 879 count); 880 if (count < 1) { 881 ep->ports[0].active = 0; 882 return; 883 } 884 885 memset(urb->transfer_buffer + count, 0xFD, ep->max_transfer - count); 886 urb->transfer_buffer_length = ep->max_transfer; 887 } 888 889 static struct usb_protocol_ops snd_usbmidi_122l_ops = { 890 .input = snd_usbmidi_us122l_input, 891 .output = snd_usbmidi_us122l_output, 892 }; 893 894 /* 895 * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching. 896 */ 897 898 static void snd_usbmidi_emagic_init_out(struct snd_usb_midi_out_endpoint *ep) 899 { 900 static const u8 init_data[] = { 901 /* initialization magic: "get version" */ 902 0xf0, 903 0x00, 0x20, 0x31, /* Emagic */ 904 0x64, /* Unitor8 */ 905 0x0b, /* version number request */ 906 0x00, /* command version */ 907 0x00, /* EEPROM, box 0 */ 908 0xf7 909 }; 910 send_bulk_static_data(ep, init_data, sizeof(init_data)); 911 /* while we're at it, pour on more magic */ 912 send_bulk_static_data(ep, init_data, sizeof(init_data)); 913 } 914 915 static void snd_usbmidi_emagic_finish_out(struct snd_usb_midi_out_endpoint *ep) 916 { 917 static const u8 finish_data[] = { 918 /* switch to patch mode with last preset */ 919 0xf0, 920 0x00, 0x20, 0x31, /* Emagic */ 921 0x64, /* Unitor8 */ 922 0x10, /* patch switch command */ 923 0x00, /* command version */ 924 0x7f, /* to all boxes */ 925 0x40, /* last preset in EEPROM */ 926 0xf7 927 }; 928 send_bulk_static_data(ep, finish_data, sizeof(finish_data)); 929 } 930 931 static void snd_usbmidi_emagic_input(struct snd_usb_midi_in_endpoint *ep, 932 uint8_t *buffer, int buffer_length) 933 { 934 int i; 935 936 /* FF indicates end of valid data */ 937 for (i = 0; i < buffer_length; ++i) 938 if (buffer[i] == 0xff) { 939 buffer_length = i; 940 break; 941 } 942 943 /* handle F5 at end of last buffer */ 944 if (ep->seen_f5) 945 goto switch_port; 946 947 while (buffer_length > 0) { 948 /* determine size of data until next F5 */ 949 for (i = 0; i < buffer_length; ++i) 950 if (buffer[i] == 0xf5) 951 break; 952 snd_usbmidi_input_data(ep, ep->current_port, buffer, i); 953 buffer += i; 954 buffer_length -= i; 955 956 if (buffer_length <= 0) 957 break; 958 /* assert(buffer[0] == 0xf5); */ 959 ep->seen_f5 = 1; 960 ++buffer; 961 --buffer_length; 962 963 switch_port: 964 if (buffer_length <= 0) 965 break; 966 if (buffer[0] < 0x80) { 967 ep->current_port = (buffer[0] - 1) & 15; 968 ++buffer; 969 --buffer_length; 970 } 971 ep->seen_f5 = 0; 972 } 973 } 974 975 static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint *ep, 976 struct urb *urb) 977 { 978 int port0 = ep->current_port; 979 uint8_t *buf = urb->transfer_buffer; 980 int buf_free = ep->max_transfer; 981 int length, i; 982 983 for (i = 0; i < 0x10; ++i) { 984 /* round-robin, starting at the last current port */ 985 int portnum = (port0 + i) & 15; 986 struct usbmidi_out_port *port = &ep->ports[portnum]; 987 988 if (!port->active) 989 continue; 990 if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) { 991 port->active = 0; 992 continue; 993 } 994 995 if (portnum != ep->current_port) { 996 if (buf_free < 2) 997 break; 998 ep->current_port = portnum; 999 buf[0] = 0xf5; 1000 buf[1] = (portnum + 1) & 15; 1001 buf += 2; 1002 buf_free -= 2; 1003 } 1004 1005 if (buf_free < 1) 1006 break; 1007 length = snd_rawmidi_transmit(port->substream, buf, buf_free); 1008 if (length > 0) { 1009 buf += length; 1010 buf_free -= length; 1011 if (buf_free < 1) 1012 break; 1013 } 1014 } 1015 if (buf_free < ep->max_transfer && buf_free > 0) { 1016 *buf = 0xff; 1017 --buf_free; 1018 } 1019 urb->transfer_buffer_length = ep->max_transfer - buf_free; 1020 } 1021 1022 static struct usb_protocol_ops snd_usbmidi_emagic_ops = { 1023 .input = snd_usbmidi_emagic_input, 1024 .output = snd_usbmidi_emagic_output, 1025 .init_out_endpoint = snd_usbmidi_emagic_init_out, 1026 .finish_out_endpoint = snd_usbmidi_emagic_finish_out, 1027 }; 1028 1029 1030 static void update_roland_altsetting(struct snd_usb_midi *umidi) 1031 { 1032 struct usb_interface *intf; 1033 struct usb_host_interface *hostif; 1034 struct usb_interface_descriptor *intfd; 1035 int is_light_load; 1036 1037 intf = umidi->iface; 1038 is_light_load = intf->cur_altsetting != intf->altsetting; 1039 if (umidi->roland_load_ctl->private_value == is_light_load) 1040 return; 1041 hostif = &intf->altsetting[umidi->roland_load_ctl->private_value]; 1042 intfd = get_iface_desc(hostif); 1043 snd_usbmidi_input_stop(&umidi->list); 1044 usb_set_interface(umidi->dev, intfd->bInterfaceNumber, 1045 intfd->bAlternateSetting); 1046 snd_usbmidi_input_start(&umidi->list); 1047 } 1048 1049 static int substream_open(struct snd_rawmidi_substream *substream, int dir, 1050 int open) 1051 { 1052 struct snd_usb_midi *umidi = substream->rmidi->private_data; 1053 struct snd_kcontrol *ctl; 1054 1055 down_read(&umidi->disc_rwsem); 1056 if (umidi->disconnected) { 1057 up_read(&umidi->disc_rwsem); 1058 return open ? -ENODEV : 0; 1059 } 1060 1061 mutex_lock(&umidi->mutex); 1062 if (open) { 1063 if (!umidi->opened[0] && !umidi->opened[1]) { 1064 if (umidi->roland_load_ctl) { 1065 ctl = umidi->roland_load_ctl; 1066 ctl->vd[0].access |= 1067 SNDRV_CTL_ELEM_ACCESS_INACTIVE; 1068 snd_ctl_notify(umidi->card, 1069 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id); 1070 update_roland_altsetting(umidi); 1071 } 1072 } 1073 umidi->opened[dir]++; 1074 if (umidi->opened[1]) 1075 snd_usbmidi_input_start(&umidi->list); 1076 } else { 1077 umidi->opened[dir]--; 1078 if (!umidi->opened[1]) 1079 snd_usbmidi_input_stop(&umidi->list); 1080 if (!umidi->opened[0] && !umidi->opened[1]) { 1081 if (umidi->roland_load_ctl) { 1082 ctl = umidi->roland_load_ctl; 1083 ctl->vd[0].access &= 1084 ~SNDRV_CTL_ELEM_ACCESS_INACTIVE; 1085 snd_ctl_notify(umidi->card, 1086 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id); 1087 } 1088 } 1089 } 1090 mutex_unlock(&umidi->mutex); 1091 up_read(&umidi->disc_rwsem); 1092 return 0; 1093 } 1094 1095 static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream) 1096 { 1097 struct snd_usb_midi *umidi = substream->rmidi->private_data; 1098 struct usbmidi_out_port *port = NULL; 1099 int i, j; 1100 1101 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) 1102 if (umidi->endpoints[i].out) 1103 for (j = 0; j < 0x10; ++j) 1104 if (umidi->endpoints[i].out->ports[j].substream == substream) { 1105 port = &umidi->endpoints[i].out->ports[j]; 1106 break; 1107 } 1108 if (!port) { 1109 snd_BUG(); 1110 return -ENXIO; 1111 } 1112 1113 substream->runtime->private_data = port; 1114 port->state = STATE_UNKNOWN; 1115 return substream_open(substream, 0, 1); 1116 } 1117 1118 static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream) 1119 { 1120 return substream_open(substream, 0, 0); 1121 } 1122 1123 static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream, 1124 int up) 1125 { 1126 struct usbmidi_out_port *port = 1127 (struct usbmidi_out_port *)substream->runtime->private_data; 1128 1129 port->active = up; 1130 if (up) { 1131 if (port->ep->umidi->disconnected) { 1132 /* gobble up remaining bytes to prevent wait in 1133 * snd_rawmidi_drain_output */ 1134 while (!snd_rawmidi_transmit_empty(substream)) 1135 snd_rawmidi_transmit_ack(substream, 1); 1136 return; 1137 } 1138 tasklet_schedule(&port->ep->tasklet); 1139 } 1140 } 1141 1142 static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream) 1143 { 1144 struct usbmidi_out_port *port = substream->runtime->private_data; 1145 struct snd_usb_midi_out_endpoint *ep = port->ep; 1146 unsigned int drain_urbs; 1147 DEFINE_WAIT(wait); 1148 long timeout = msecs_to_jiffies(50); 1149 1150 if (ep->umidi->disconnected) 1151 return; 1152 /* 1153 * The substream buffer is empty, but some data might still be in the 1154 * currently active URBs, so we have to wait for those to complete. 1155 */ 1156 spin_lock_irq(&ep->buffer_lock); 1157 drain_urbs = ep->active_urbs; 1158 if (drain_urbs) { 1159 ep->drain_urbs |= drain_urbs; 1160 do { 1161 prepare_to_wait(&ep->drain_wait, &wait, 1162 TASK_UNINTERRUPTIBLE); 1163 spin_unlock_irq(&ep->buffer_lock); 1164 timeout = schedule_timeout(timeout); 1165 spin_lock_irq(&ep->buffer_lock); 1166 drain_urbs &= ep->drain_urbs; 1167 } while (drain_urbs && timeout); 1168 finish_wait(&ep->drain_wait, &wait); 1169 } 1170 spin_unlock_irq(&ep->buffer_lock); 1171 } 1172 1173 static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream) 1174 { 1175 return substream_open(substream, 1, 1); 1176 } 1177 1178 static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream) 1179 { 1180 return substream_open(substream, 1, 0); 1181 } 1182 1183 static void snd_usbmidi_input_trigger(struct snd_rawmidi_substream *substream, 1184 int up) 1185 { 1186 struct snd_usb_midi *umidi = substream->rmidi->private_data; 1187 1188 if (up) 1189 set_bit(substream->number, &umidi->input_triggered); 1190 else 1191 clear_bit(substream->number, &umidi->input_triggered); 1192 } 1193 1194 static struct snd_rawmidi_ops snd_usbmidi_output_ops = { 1195 .open = snd_usbmidi_output_open, 1196 .close = snd_usbmidi_output_close, 1197 .trigger = snd_usbmidi_output_trigger, 1198 .drain = snd_usbmidi_output_drain, 1199 }; 1200 1201 static struct snd_rawmidi_ops snd_usbmidi_input_ops = { 1202 .open = snd_usbmidi_input_open, 1203 .close = snd_usbmidi_input_close, 1204 .trigger = snd_usbmidi_input_trigger 1205 }; 1206 1207 static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb, 1208 unsigned int buffer_length) 1209 { 1210 usb_free_coherent(umidi->dev, buffer_length, 1211 urb->transfer_buffer, urb->transfer_dma); 1212 usb_free_urb(urb); 1213 } 1214 1215 /* 1216 * Frees an input endpoint. 1217 * May be called when ep hasn't been initialized completely. 1218 */ 1219 static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint *ep) 1220 { 1221 unsigned int i; 1222 1223 for (i = 0; i < INPUT_URBS; ++i) 1224 if (ep->urbs[i]) 1225 free_urb_and_buffer(ep->umidi, ep->urbs[i], 1226 ep->urbs[i]->transfer_buffer_length); 1227 kfree(ep); 1228 } 1229 1230 /* 1231 * Creates an input endpoint. 1232 */ 1233 static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi *umidi, 1234 struct snd_usb_midi_endpoint_info *ep_info, 1235 struct snd_usb_midi_endpoint *rep) 1236 { 1237 struct snd_usb_midi_in_endpoint *ep; 1238 void *buffer; 1239 unsigned int pipe; 1240 int length; 1241 unsigned int i; 1242 1243 rep->in = NULL; 1244 ep = kzalloc(sizeof(*ep), GFP_KERNEL); 1245 if (!ep) 1246 return -ENOMEM; 1247 ep->umidi = umidi; 1248 1249 for (i = 0; i < INPUT_URBS; ++i) { 1250 ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL); 1251 if (!ep->urbs[i]) { 1252 snd_usbmidi_in_endpoint_delete(ep); 1253 return -ENOMEM; 1254 } 1255 } 1256 if (ep_info->in_interval) 1257 pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep); 1258 else 1259 pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep); 1260 length = usb_maxpacket(umidi->dev, pipe, 0); 1261 for (i = 0; i < INPUT_URBS; ++i) { 1262 buffer = usb_alloc_coherent(umidi->dev, length, GFP_KERNEL, 1263 &ep->urbs[i]->transfer_dma); 1264 if (!buffer) { 1265 snd_usbmidi_in_endpoint_delete(ep); 1266 return -ENOMEM; 1267 } 1268 if (ep_info->in_interval) 1269 usb_fill_int_urb(ep->urbs[i], umidi->dev, 1270 pipe, buffer, length, 1271 snd_usbmidi_in_urb_complete, 1272 ep, ep_info->in_interval); 1273 else 1274 usb_fill_bulk_urb(ep->urbs[i], umidi->dev, 1275 pipe, buffer, length, 1276 snd_usbmidi_in_urb_complete, ep); 1277 ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP; 1278 } 1279 1280 rep->in = ep; 1281 return 0; 1282 } 1283 1284 /* 1285 * Frees an output endpoint. 1286 * May be called when ep hasn't been initialized completely. 1287 */ 1288 static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep) 1289 { 1290 unsigned int i; 1291 1292 for (i = 0; i < OUTPUT_URBS; ++i) 1293 if (ep->urbs[i].urb) { 1294 free_urb_and_buffer(ep->umidi, ep->urbs[i].urb, 1295 ep->max_transfer); 1296 ep->urbs[i].urb = NULL; 1297 } 1298 } 1299 1300 static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep) 1301 { 1302 snd_usbmidi_out_endpoint_clear(ep); 1303 kfree(ep); 1304 } 1305 1306 /* 1307 * Creates an output endpoint, and initializes output ports. 1308 */ 1309 static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi *umidi, 1310 struct snd_usb_midi_endpoint_info *ep_info, 1311 struct snd_usb_midi_endpoint *rep) 1312 { 1313 struct snd_usb_midi_out_endpoint *ep; 1314 unsigned int i; 1315 unsigned int pipe; 1316 void *buffer; 1317 1318 rep->out = NULL; 1319 ep = kzalloc(sizeof(*ep), GFP_KERNEL); 1320 if (!ep) 1321 return -ENOMEM; 1322 ep->umidi = umidi; 1323 1324 for (i = 0; i < OUTPUT_URBS; ++i) { 1325 ep->urbs[i].urb = usb_alloc_urb(0, GFP_KERNEL); 1326 if (!ep->urbs[i].urb) { 1327 snd_usbmidi_out_endpoint_delete(ep); 1328 return -ENOMEM; 1329 } 1330 ep->urbs[i].ep = ep; 1331 } 1332 if (ep_info->out_interval) 1333 pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep); 1334 else 1335 pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep); 1336 switch (umidi->usb_id) { 1337 default: 1338 ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1); 1339 break; 1340 /* 1341 * Various chips declare a packet size larger than 4 bytes, but 1342 * do not actually work with larger packets: 1343 */ 1344 case USB_ID(0x0a92, 0x1020): /* ESI M4U */ 1345 case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */ 1346 case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */ 1347 case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */ 1348 case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */ 1349 case USB_ID(0xfc08, 0x0101): /* Unknown vendor Cable */ 1350 ep->max_transfer = 4; 1351 break; 1352 /* 1353 * Some devices only work with 9 bytes packet size: 1354 */ 1355 case USB_ID(0x0644, 0x800E): /* Tascam US-122L */ 1356 case USB_ID(0x0644, 0x800F): /* Tascam US-144 */ 1357 ep->max_transfer = 9; 1358 break; 1359 } 1360 for (i = 0; i < OUTPUT_URBS; ++i) { 1361 buffer = usb_alloc_coherent(umidi->dev, 1362 ep->max_transfer, GFP_KERNEL, 1363 &ep->urbs[i].urb->transfer_dma); 1364 if (!buffer) { 1365 snd_usbmidi_out_endpoint_delete(ep); 1366 return -ENOMEM; 1367 } 1368 if (ep_info->out_interval) 1369 usb_fill_int_urb(ep->urbs[i].urb, umidi->dev, 1370 pipe, buffer, ep->max_transfer, 1371 snd_usbmidi_out_urb_complete, 1372 &ep->urbs[i], ep_info->out_interval); 1373 else 1374 usb_fill_bulk_urb(ep->urbs[i].urb, umidi->dev, 1375 pipe, buffer, ep->max_transfer, 1376 snd_usbmidi_out_urb_complete, 1377 &ep->urbs[i]); 1378 ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; 1379 } 1380 1381 spin_lock_init(&ep->buffer_lock); 1382 tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep); 1383 init_waitqueue_head(&ep->drain_wait); 1384 1385 for (i = 0; i < 0x10; ++i) 1386 if (ep_info->out_cables & (1 << i)) { 1387 ep->ports[i].ep = ep; 1388 ep->ports[i].cable = i << 4; 1389 } 1390 1391 if (umidi->usb_protocol_ops->init_out_endpoint) 1392 umidi->usb_protocol_ops->init_out_endpoint(ep); 1393 1394 rep->out = ep; 1395 return 0; 1396 } 1397 1398 /* 1399 * Frees everything. 1400 */ 1401 static void snd_usbmidi_free(struct snd_usb_midi *umidi) 1402 { 1403 int i; 1404 1405 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 1406 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i]; 1407 if (ep->out) 1408 snd_usbmidi_out_endpoint_delete(ep->out); 1409 if (ep->in) 1410 snd_usbmidi_in_endpoint_delete(ep->in); 1411 } 1412 mutex_destroy(&umidi->mutex); 1413 kfree(umidi); 1414 } 1415 1416 /* 1417 * Unlinks all URBs (must be done before the usb_device is deleted). 1418 */ 1419 void snd_usbmidi_disconnect(struct list_head *p) 1420 { 1421 struct snd_usb_midi *umidi; 1422 unsigned int i, j; 1423 1424 umidi = list_entry(p, struct snd_usb_midi, list); 1425 /* 1426 * an URB's completion handler may start the timer and 1427 * a timer may submit an URB. To reliably break the cycle 1428 * a flag under lock must be used 1429 */ 1430 down_write(&umidi->disc_rwsem); 1431 spin_lock_irq(&umidi->disc_lock); 1432 umidi->disconnected = 1; 1433 spin_unlock_irq(&umidi->disc_lock); 1434 up_write(&umidi->disc_rwsem); 1435 1436 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 1437 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i]; 1438 if (ep->out) 1439 tasklet_kill(&ep->out->tasklet); 1440 if (ep->out) { 1441 for (j = 0; j < OUTPUT_URBS; ++j) 1442 usb_kill_urb(ep->out->urbs[j].urb); 1443 if (umidi->usb_protocol_ops->finish_out_endpoint) 1444 umidi->usb_protocol_ops->finish_out_endpoint(ep->out); 1445 ep->out->active_urbs = 0; 1446 if (ep->out->drain_urbs) { 1447 ep->out->drain_urbs = 0; 1448 wake_up(&ep->out->drain_wait); 1449 } 1450 } 1451 if (ep->in) 1452 for (j = 0; j < INPUT_URBS; ++j) 1453 usb_kill_urb(ep->in->urbs[j]); 1454 /* free endpoints here; later call can result in Oops */ 1455 if (ep->out) 1456 snd_usbmidi_out_endpoint_clear(ep->out); 1457 if (ep->in) { 1458 snd_usbmidi_in_endpoint_delete(ep->in); 1459 ep->in = NULL; 1460 } 1461 } 1462 del_timer_sync(&umidi->error_timer); 1463 } 1464 EXPORT_SYMBOL(snd_usbmidi_disconnect); 1465 1466 static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi) 1467 { 1468 struct snd_usb_midi *umidi = rmidi->private_data; 1469 snd_usbmidi_free(umidi); 1470 } 1471 1472 static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi *umidi, 1473 int stream, 1474 int number) 1475 { 1476 struct snd_rawmidi_substream *substream; 1477 1478 list_for_each_entry(substream, &umidi->rmidi->streams[stream].substreams, 1479 list) { 1480 if (substream->number == number) 1481 return substream; 1482 } 1483 return NULL; 1484 } 1485 1486 /* 1487 * This list specifies names for ports that do not fit into the standard 1488 * "(product) MIDI (n)" schema because they aren't external MIDI ports, 1489 * such as internal control or synthesizer ports. 1490 */ 1491 static struct port_info { 1492 u32 id; 1493 short int port; 1494 short int voices; 1495 const char *name; 1496 unsigned int seq_flags; 1497 } snd_usbmidi_port_info[] = { 1498 #define PORT_INFO(vendor, product, num, name_, voices_, flags) \ 1499 { .id = USB_ID(vendor, product), \ 1500 .port = num, .voices = voices_, \ 1501 .name = name_, .seq_flags = flags } 1502 #define EXTERNAL_PORT(vendor, product, num, name) \ 1503 PORT_INFO(vendor, product, num, name, 0, \ 1504 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1505 SNDRV_SEQ_PORT_TYPE_HARDWARE | \ 1506 SNDRV_SEQ_PORT_TYPE_PORT) 1507 #define CONTROL_PORT(vendor, product, num, name) \ 1508 PORT_INFO(vendor, product, num, name, 0, \ 1509 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1510 SNDRV_SEQ_PORT_TYPE_HARDWARE) 1511 #define GM_SYNTH_PORT(vendor, product, num, name, voices) \ 1512 PORT_INFO(vendor, product, num, name, voices, \ 1513 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1514 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \ 1515 SNDRV_SEQ_PORT_TYPE_HARDWARE | \ 1516 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER) 1517 #define ROLAND_SYNTH_PORT(vendor, product, num, name, voices) \ 1518 PORT_INFO(vendor, product, num, name, voices, \ 1519 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1520 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \ 1521 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \ 1522 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \ 1523 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \ 1524 SNDRV_SEQ_PORT_TYPE_HARDWARE | \ 1525 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER) 1526 #define SOUNDCANVAS_PORT(vendor, product, num, name, voices) \ 1527 PORT_INFO(vendor, product, num, name, voices, \ 1528 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1529 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \ 1530 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \ 1531 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \ 1532 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \ 1533 SNDRV_SEQ_PORT_TYPE_MIDI_MT32 | \ 1534 SNDRV_SEQ_PORT_TYPE_HARDWARE | \ 1535 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER) 1536 /* Yamaha MOTIF XF */ 1537 GM_SYNTH_PORT(0x0499, 0x105c, 0, "%s Tone Generator", 128), 1538 CONTROL_PORT(0x0499, 0x105c, 1, "%s Remote Control"), 1539 EXTERNAL_PORT(0x0499, 0x105c, 2, "%s Thru"), 1540 CONTROL_PORT(0x0499, 0x105c, 3, "%s Editor"), 1541 /* Roland UA-100 */ 1542 CONTROL_PORT(0x0582, 0x0000, 2, "%s Control"), 1543 /* Roland SC-8850 */ 1544 SOUNDCANVAS_PORT(0x0582, 0x0003, 0, "%s Part A", 128), 1545 SOUNDCANVAS_PORT(0x0582, 0x0003, 1, "%s Part B", 128), 1546 SOUNDCANVAS_PORT(0x0582, 0x0003, 2, "%s Part C", 128), 1547 SOUNDCANVAS_PORT(0x0582, 0x0003, 3, "%s Part D", 128), 1548 EXTERNAL_PORT(0x0582, 0x0003, 4, "%s MIDI 1"), 1549 EXTERNAL_PORT(0x0582, 0x0003, 5, "%s MIDI 2"), 1550 /* Roland U-8 */ 1551 EXTERNAL_PORT(0x0582, 0x0004, 0, "%s MIDI"), 1552 CONTROL_PORT(0x0582, 0x0004, 1, "%s Control"), 1553 /* Roland SC-8820 */ 1554 SOUNDCANVAS_PORT(0x0582, 0x0007, 0, "%s Part A", 64), 1555 SOUNDCANVAS_PORT(0x0582, 0x0007, 1, "%s Part B", 64), 1556 EXTERNAL_PORT(0x0582, 0x0007, 2, "%s MIDI"), 1557 /* Roland SK-500 */ 1558 SOUNDCANVAS_PORT(0x0582, 0x000b, 0, "%s Part A", 64), 1559 SOUNDCANVAS_PORT(0x0582, 0x000b, 1, "%s Part B", 64), 1560 EXTERNAL_PORT(0x0582, 0x000b, 2, "%s MIDI"), 1561 /* Roland SC-D70 */ 1562 SOUNDCANVAS_PORT(0x0582, 0x000c, 0, "%s Part A", 64), 1563 SOUNDCANVAS_PORT(0x0582, 0x000c, 1, "%s Part B", 64), 1564 EXTERNAL_PORT(0x0582, 0x000c, 2, "%s MIDI"), 1565 /* Edirol UM-880 */ 1566 CONTROL_PORT(0x0582, 0x0014, 8, "%s Control"), 1567 /* Edirol SD-90 */ 1568 ROLAND_SYNTH_PORT(0x0582, 0x0016, 0, "%s Part A", 128), 1569 ROLAND_SYNTH_PORT(0x0582, 0x0016, 1, "%s Part B", 128), 1570 EXTERNAL_PORT(0x0582, 0x0016, 2, "%s MIDI 1"), 1571 EXTERNAL_PORT(0x0582, 0x0016, 3, "%s MIDI 2"), 1572 /* Edirol UM-550 */ 1573 CONTROL_PORT(0x0582, 0x0023, 5, "%s Control"), 1574 /* Edirol SD-20 */ 1575 ROLAND_SYNTH_PORT(0x0582, 0x0027, 0, "%s Part A", 64), 1576 ROLAND_SYNTH_PORT(0x0582, 0x0027, 1, "%s Part B", 64), 1577 EXTERNAL_PORT(0x0582, 0x0027, 2, "%s MIDI"), 1578 /* Edirol SD-80 */ 1579 ROLAND_SYNTH_PORT(0x0582, 0x0029, 0, "%s Part A", 128), 1580 ROLAND_SYNTH_PORT(0x0582, 0x0029, 1, "%s Part B", 128), 1581 EXTERNAL_PORT(0x0582, 0x0029, 2, "%s MIDI 1"), 1582 EXTERNAL_PORT(0x0582, 0x0029, 3, "%s MIDI 2"), 1583 /* Edirol UA-700 */ 1584 EXTERNAL_PORT(0x0582, 0x002b, 0, "%s MIDI"), 1585 CONTROL_PORT(0x0582, 0x002b, 1, "%s Control"), 1586 /* Roland VariOS */ 1587 EXTERNAL_PORT(0x0582, 0x002f, 0, "%s MIDI"), 1588 EXTERNAL_PORT(0x0582, 0x002f, 1, "%s External MIDI"), 1589 EXTERNAL_PORT(0x0582, 0x002f, 2, "%s Sync"), 1590 /* Edirol PCR */ 1591 EXTERNAL_PORT(0x0582, 0x0033, 0, "%s MIDI"), 1592 EXTERNAL_PORT(0x0582, 0x0033, 1, "%s 1"), 1593 EXTERNAL_PORT(0x0582, 0x0033, 2, "%s 2"), 1594 /* BOSS GS-10 */ 1595 EXTERNAL_PORT(0x0582, 0x003b, 0, "%s MIDI"), 1596 CONTROL_PORT(0x0582, 0x003b, 1, "%s Control"), 1597 /* Edirol UA-1000 */ 1598 EXTERNAL_PORT(0x0582, 0x0044, 0, "%s MIDI"), 1599 CONTROL_PORT(0x0582, 0x0044, 1, "%s Control"), 1600 /* Edirol UR-80 */ 1601 EXTERNAL_PORT(0x0582, 0x0048, 0, "%s MIDI"), 1602 EXTERNAL_PORT(0x0582, 0x0048, 1, "%s 1"), 1603 EXTERNAL_PORT(0x0582, 0x0048, 2, "%s 2"), 1604 /* Edirol PCR-A */ 1605 EXTERNAL_PORT(0x0582, 0x004d, 0, "%s MIDI"), 1606 EXTERNAL_PORT(0x0582, 0x004d, 1, "%s 1"), 1607 EXTERNAL_PORT(0x0582, 0x004d, 2, "%s 2"), 1608 /* BOSS GT-PRO */ 1609 CONTROL_PORT(0x0582, 0x0089, 0, "%s Control"), 1610 /* Edirol UM-3EX */ 1611 CONTROL_PORT(0x0582, 0x009a, 3, "%s Control"), 1612 /* Roland VG-99 */ 1613 CONTROL_PORT(0x0582, 0x00b2, 0, "%s Control"), 1614 EXTERNAL_PORT(0x0582, 0x00b2, 1, "%s MIDI"), 1615 /* Cakewalk Sonar V-Studio 100 */ 1616 EXTERNAL_PORT(0x0582, 0x00eb, 0, "%s MIDI"), 1617 CONTROL_PORT(0x0582, 0x00eb, 1, "%s Control"), 1618 /* Roland VB-99 */ 1619 CONTROL_PORT(0x0582, 0x0102, 0, "%s Control"), 1620 EXTERNAL_PORT(0x0582, 0x0102, 1, "%s MIDI"), 1621 /* Roland A-PRO */ 1622 EXTERNAL_PORT(0x0582, 0x010f, 0, "%s MIDI"), 1623 CONTROL_PORT(0x0582, 0x010f, 1, "%s 1"), 1624 CONTROL_PORT(0x0582, 0x010f, 2, "%s 2"), 1625 /* Roland SD-50 */ 1626 ROLAND_SYNTH_PORT(0x0582, 0x0114, 0, "%s Synth", 128), 1627 EXTERNAL_PORT(0x0582, 0x0114, 1, "%s MIDI"), 1628 CONTROL_PORT(0x0582, 0x0114, 2, "%s Control"), 1629 /* Roland OCTA-CAPTURE */ 1630 EXTERNAL_PORT(0x0582, 0x0120, 0, "%s MIDI"), 1631 CONTROL_PORT(0x0582, 0x0120, 1, "%s Control"), 1632 EXTERNAL_PORT(0x0582, 0x0121, 0, "%s MIDI"), 1633 CONTROL_PORT(0x0582, 0x0121, 1, "%s Control"), 1634 /* Roland SPD-SX */ 1635 CONTROL_PORT(0x0582, 0x0145, 0, "%s Control"), 1636 EXTERNAL_PORT(0x0582, 0x0145, 1, "%s MIDI"), 1637 /* Roland A-Series */ 1638 CONTROL_PORT(0x0582, 0x0156, 0, "%s Keyboard"), 1639 EXTERNAL_PORT(0x0582, 0x0156, 1, "%s MIDI"), 1640 /* Roland INTEGRA-7 */ 1641 ROLAND_SYNTH_PORT(0x0582, 0x015b, 0, "%s Synth", 128), 1642 CONTROL_PORT(0x0582, 0x015b, 1, "%s Control"), 1643 /* M-Audio MidiSport 8x8 */ 1644 CONTROL_PORT(0x0763, 0x1031, 8, "%s Control"), 1645 CONTROL_PORT(0x0763, 0x1033, 8, "%s Control"), 1646 /* MOTU Fastlane */ 1647 EXTERNAL_PORT(0x07fd, 0x0001, 0, "%s MIDI A"), 1648 EXTERNAL_PORT(0x07fd, 0x0001, 1, "%s MIDI B"), 1649 /* Emagic Unitor8/AMT8/MT4 */ 1650 EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"), 1651 EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"), 1652 EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"), 1653 /* Akai MPD16 */ 1654 CONTROL_PORT(0x09e8, 0x0062, 0, "%s Control"), 1655 PORT_INFO(0x09e8, 0x0062, 1, "%s MIDI", 0, 1656 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | 1657 SNDRV_SEQ_PORT_TYPE_HARDWARE), 1658 /* Access Music Virus TI */ 1659 EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"), 1660 PORT_INFO(0x133e, 0x0815, 1, "%s Synth", 0, 1661 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | 1662 SNDRV_SEQ_PORT_TYPE_HARDWARE | 1663 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER), 1664 }; 1665 1666 static struct port_info *find_port_info(struct snd_usb_midi *umidi, int number) 1667 { 1668 int i; 1669 1670 for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) { 1671 if (snd_usbmidi_port_info[i].id == umidi->usb_id && 1672 snd_usbmidi_port_info[i].port == number) 1673 return &snd_usbmidi_port_info[i]; 1674 } 1675 return NULL; 1676 } 1677 1678 static void snd_usbmidi_get_port_info(struct snd_rawmidi *rmidi, int number, 1679 struct snd_seq_port_info *seq_port_info) 1680 { 1681 struct snd_usb_midi *umidi = rmidi->private_data; 1682 struct port_info *port_info; 1683 1684 /* TODO: read port flags from descriptors */ 1685 port_info = find_port_info(umidi, number); 1686 if (port_info) { 1687 seq_port_info->type = port_info->seq_flags; 1688 seq_port_info->midi_voices = port_info->voices; 1689 } 1690 } 1691 1692 static void snd_usbmidi_init_substream(struct snd_usb_midi *umidi, 1693 int stream, int number, 1694 struct snd_rawmidi_substream **rsubstream) 1695 { 1696 struct port_info *port_info; 1697 const char *name_format; 1698 1699 struct snd_rawmidi_substream *substream = 1700 snd_usbmidi_find_substream(umidi, stream, number); 1701 if (!substream) { 1702 dev_err(&umidi->dev->dev, "substream %d:%d not found\n", stream, 1703 number); 1704 return; 1705 } 1706 1707 /* TODO: read port name from jack descriptor */ 1708 port_info = find_port_info(umidi, number); 1709 name_format = port_info ? port_info->name : "%s MIDI %d"; 1710 snprintf(substream->name, sizeof(substream->name), 1711 name_format, umidi->card->shortname, number + 1); 1712 1713 *rsubstream = substream; 1714 } 1715 1716 /* 1717 * Creates the endpoints and their ports. 1718 */ 1719 static int snd_usbmidi_create_endpoints(struct snd_usb_midi *umidi, 1720 struct snd_usb_midi_endpoint_info *endpoints) 1721 { 1722 int i, j, err; 1723 int out_ports = 0, in_ports = 0; 1724 1725 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 1726 if (endpoints[i].out_cables) { 1727 err = snd_usbmidi_out_endpoint_create(umidi, 1728 &endpoints[i], 1729 &umidi->endpoints[i]); 1730 if (err < 0) 1731 return err; 1732 } 1733 if (endpoints[i].in_cables) { 1734 err = snd_usbmidi_in_endpoint_create(umidi, 1735 &endpoints[i], 1736 &umidi->endpoints[i]); 1737 if (err < 0) 1738 return err; 1739 } 1740 1741 for (j = 0; j < 0x10; ++j) { 1742 if (endpoints[i].out_cables & (1 << j)) { 1743 snd_usbmidi_init_substream(umidi, 1744 SNDRV_RAWMIDI_STREAM_OUTPUT, 1745 out_ports, 1746 &umidi->endpoints[i].out->ports[j].substream); 1747 ++out_ports; 1748 } 1749 if (endpoints[i].in_cables & (1 << j)) { 1750 snd_usbmidi_init_substream(umidi, 1751 SNDRV_RAWMIDI_STREAM_INPUT, 1752 in_ports, 1753 &umidi->endpoints[i].in->ports[j].substream); 1754 ++in_ports; 1755 } 1756 } 1757 } 1758 dev_dbg(&umidi->dev->dev, "created %d output and %d input ports\n", 1759 out_ports, in_ports); 1760 return 0; 1761 } 1762 1763 /* 1764 * Returns MIDIStreaming device capabilities. 1765 */ 1766 static int snd_usbmidi_get_ms_info(struct snd_usb_midi *umidi, 1767 struct snd_usb_midi_endpoint_info *endpoints) 1768 { 1769 struct usb_interface *intf; 1770 struct usb_host_interface *hostif; 1771 struct usb_interface_descriptor *intfd; 1772 struct usb_ms_header_descriptor *ms_header; 1773 struct usb_host_endpoint *hostep; 1774 struct usb_endpoint_descriptor *ep; 1775 struct usb_ms_endpoint_descriptor *ms_ep; 1776 int i, epidx; 1777 1778 intf = umidi->iface; 1779 if (!intf) 1780 return -ENXIO; 1781 hostif = &intf->altsetting[0]; 1782 intfd = get_iface_desc(hostif); 1783 ms_header = (struct usb_ms_header_descriptor *)hostif->extra; 1784 if (hostif->extralen >= 7 && 1785 ms_header->bLength >= 7 && 1786 ms_header->bDescriptorType == USB_DT_CS_INTERFACE && 1787 ms_header->bDescriptorSubtype == UAC_HEADER) 1788 dev_dbg(&umidi->dev->dev, "MIDIStreaming version %02x.%02x\n", 1789 ms_header->bcdMSC[1], ms_header->bcdMSC[0]); 1790 else 1791 dev_warn(&umidi->dev->dev, 1792 "MIDIStreaming interface descriptor not found\n"); 1793 1794 epidx = 0; 1795 for (i = 0; i < intfd->bNumEndpoints; ++i) { 1796 hostep = &hostif->endpoint[i]; 1797 ep = get_ep_desc(hostep); 1798 if (!usb_endpoint_xfer_bulk(ep) && !usb_endpoint_xfer_int(ep)) 1799 continue; 1800 ms_ep = (struct usb_ms_endpoint_descriptor *)hostep->extra; 1801 if (hostep->extralen < 4 || 1802 ms_ep->bLength < 4 || 1803 ms_ep->bDescriptorType != USB_DT_CS_ENDPOINT || 1804 ms_ep->bDescriptorSubtype != UAC_MS_GENERAL) 1805 continue; 1806 if (usb_endpoint_dir_out(ep)) { 1807 if (endpoints[epidx].out_ep) { 1808 if (++epidx >= MIDI_MAX_ENDPOINTS) { 1809 dev_warn(&umidi->dev->dev, 1810 "too many endpoints\n"); 1811 break; 1812 } 1813 } 1814 endpoints[epidx].out_ep = usb_endpoint_num(ep); 1815 if (usb_endpoint_xfer_int(ep)) 1816 endpoints[epidx].out_interval = ep->bInterval; 1817 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW) 1818 /* 1819 * Low speed bulk transfers don't exist, so 1820 * force interrupt transfers for devices like 1821 * ESI MIDI Mate that try to use them anyway. 1822 */ 1823 endpoints[epidx].out_interval = 1; 1824 endpoints[epidx].out_cables = 1825 (1 << ms_ep->bNumEmbMIDIJack) - 1; 1826 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n", 1827 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack); 1828 } else { 1829 if (endpoints[epidx].in_ep) { 1830 if (++epidx >= MIDI_MAX_ENDPOINTS) { 1831 dev_warn(&umidi->dev->dev, 1832 "too many endpoints\n"); 1833 break; 1834 } 1835 } 1836 endpoints[epidx].in_ep = usb_endpoint_num(ep); 1837 if (usb_endpoint_xfer_int(ep)) 1838 endpoints[epidx].in_interval = ep->bInterval; 1839 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW) 1840 endpoints[epidx].in_interval = 1; 1841 endpoints[epidx].in_cables = 1842 (1 << ms_ep->bNumEmbMIDIJack) - 1; 1843 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n", 1844 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack); 1845 } 1846 } 1847 return 0; 1848 } 1849 1850 static int roland_load_info(struct snd_kcontrol *kcontrol, 1851 struct snd_ctl_elem_info *info) 1852 { 1853 static const char *const names[] = { "High Load", "Light Load" }; 1854 1855 return snd_ctl_enum_info(info, 1, 2, names); 1856 } 1857 1858 static int roland_load_get(struct snd_kcontrol *kcontrol, 1859 struct snd_ctl_elem_value *value) 1860 { 1861 value->value.enumerated.item[0] = kcontrol->private_value; 1862 return 0; 1863 } 1864 1865 static int roland_load_put(struct snd_kcontrol *kcontrol, 1866 struct snd_ctl_elem_value *value) 1867 { 1868 struct snd_usb_midi *umidi = kcontrol->private_data; 1869 int changed; 1870 1871 if (value->value.enumerated.item[0] > 1) 1872 return -EINVAL; 1873 mutex_lock(&umidi->mutex); 1874 changed = value->value.enumerated.item[0] != kcontrol->private_value; 1875 if (changed) 1876 kcontrol->private_value = value->value.enumerated.item[0]; 1877 mutex_unlock(&umidi->mutex); 1878 return changed; 1879 } 1880 1881 static struct snd_kcontrol_new roland_load_ctl = { 1882 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1883 .name = "MIDI Input Mode", 1884 .info = roland_load_info, 1885 .get = roland_load_get, 1886 .put = roland_load_put, 1887 .private_value = 1, 1888 }; 1889 1890 /* 1891 * On Roland devices, use the second alternate setting to be able to use 1892 * the interrupt input endpoint. 1893 */ 1894 static void snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi *umidi) 1895 { 1896 struct usb_interface *intf; 1897 struct usb_host_interface *hostif; 1898 struct usb_interface_descriptor *intfd; 1899 1900 intf = umidi->iface; 1901 if (!intf || intf->num_altsetting != 2) 1902 return; 1903 1904 hostif = &intf->altsetting[1]; 1905 intfd = get_iface_desc(hostif); 1906 if (intfd->bNumEndpoints != 2 || 1907 (get_endpoint(hostif, 0)->bmAttributes & 1908 USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK || 1909 (get_endpoint(hostif, 1)->bmAttributes & 1910 USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT) 1911 return; 1912 1913 dev_dbg(&umidi->dev->dev, "switching to altsetting %d with int ep\n", 1914 intfd->bAlternateSetting); 1915 usb_set_interface(umidi->dev, intfd->bInterfaceNumber, 1916 intfd->bAlternateSetting); 1917 1918 umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi); 1919 if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0) 1920 umidi->roland_load_ctl = NULL; 1921 } 1922 1923 /* 1924 * Try to find any usable endpoints in the interface. 1925 */ 1926 static int snd_usbmidi_detect_endpoints(struct snd_usb_midi *umidi, 1927 struct snd_usb_midi_endpoint_info *endpoint, 1928 int max_endpoints) 1929 { 1930 struct usb_interface *intf; 1931 struct usb_host_interface *hostif; 1932 struct usb_interface_descriptor *intfd; 1933 struct usb_endpoint_descriptor *epd; 1934 int i, out_eps = 0, in_eps = 0; 1935 1936 if (USB_ID_VENDOR(umidi->usb_id) == 0x0582) 1937 snd_usbmidi_switch_roland_altsetting(umidi); 1938 1939 if (endpoint[0].out_ep || endpoint[0].in_ep) 1940 return 0; 1941 1942 intf = umidi->iface; 1943 if (!intf || intf->num_altsetting < 1) 1944 return -ENOENT; 1945 hostif = intf->cur_altsetting; 1946 intfd = get_iface_desc(hostif); 1947 1948 for (i = 0; i < intfd->bNumEndpoints; ++i) { 1949 epd = get_endpoint(hostif, i); 1950 if (!usb_endpoint_xfer_bulk(epd) && 1951 !usb_endpoint_xfer_int(epd)) 1952 continue; 1953 if (out_eps < max_endpoints && 1954 usb_endpoint_dir_out(epd)) { 1955 endpoint[out_eps].out_ep = usb_endpoint_num(epd); 1956 if (usb_endpoint_xfer_int(epd)) 1957 endpoint[out_eps].out_interval = epd->bInterval; 1958 ++out_eps; 1959 } 1960 if (in_eps < max_endpoints && 1961 usb_endpoint_dir_in(epd)) { 1962 endpoint[in_eps].in_ep = usb_endpoint_num(epd); 1963 if (usb_endpoint_xfer_int(epd)) 1964 endpoint[in_eps].in_interval = epd->bInterval; 1965 ++in_eps; 1966 } 1967 } 1968 return (out_eps || in_eps) ? 0 : -ENOENT; 1969 } 1970 1971 /* 1972 * Detects the endpoints for one-port-per-endpoint protocols. 1973 */ 1974 static int snd_usbmidi_detect_per_port_endpoints(struct snd_usb_midi *umidi, 1975 struct snd_usb_midi_endpoint_info *endpoints) 1976 { 1977 int err, i; 1978 1979 err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS); 1980 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 1981 if (endpoints[i].out_ep) 1982 endpoints[i].out_cables = 0x0001; 1983 if (endpoints[i].in_ep) 1984 endpoints[i].in_cables = 0x0001; 1985 } 1986 return err; 1987 } 1988 1989 /* 1990 * Detects the endpoints and ports of Yamaha devices. 1991 */ 1992 static int snd_usbmidi_detect_yamaha(struct snd_usb_midi *umidi, 1993 struct snd_usb_midi_endpoint_info *endpoint) 1994 { 1995 struct usb_interface *intf; 1996 struct usb_host_interface *hostif; 1997 struct usb_interface_descriptor *intfd; 1998 uint8_t *cs_desc; 1999 2000 intf = umidi->iface; 2001 if (!intf) 2002 return -ENOENT; 2003 hostif = intf->altsetting; 2004 intfd = get_iface_desc(hostif); 2005 if (intfd->bNumEndpoints < 1) 2006 return -ENOENT; 2007 2008 /* 2009 * For each port there is one MIDI_IN/OUT_JACK descriptor, not 2010 * necessarily with any useful contents. So simply count 'em. 2011 */ 2012 for (cs_desc = hostif->extra; 2013 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2; 2014 cs_desc += cs_desc[0]) { 2015 if (cs_desc[1] == USB_DT_CS_INTERFACE) { 2016 if (cs_desc[2] == UAC_MIDI_IN_JACK) 2017 endpoint->in_cables = 2018 (endpoint->in_cables << 1) | 1; 2019 else if (cs_desc[2] == UAC_MIDI_OUT_JACK) 2020 endpoint->out_cables = 2021 (endpoint->out_cables << 1) | 1; 2022 } 2023 } 2024 if (!endpoint->in_cables && !endpoint->out_cables) 2025 return -ENOENT; 2026 2027 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1); 2028 } 2029 2030 /* 2031 * Detects the endpoints and ports of Roland devices. 2032 */ 2033 static int snd_usbmidi_detect_roland(struct snd_usb_midi *umidi, 2034 struct snd_usb_midi_endpoint_info *endpoint) 2035 { 2036 struct usb_interface *intf; 2037 struct usb_host_interface *hostif; 2038 u8 *cs_desc; 2039 2040 intf = umidi->iface; 2041 if (!intf) 2042 return -ENOENT; 2043 hostif = intf->altsetting; 2044 /* 2045 * Some devices have a descriptor <06 24 F1 02 <inputs> <outputs>>, 2046 * some have standard class descriptors, or both kinds, or neither. 2047 */ 2048 for (cs_desc = hostif->extra; 2049 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2; 2050 cs_desc += cs_desc[0]) { 2051 if (cs_desc[0] >= 6 && 2052 cs_desc[1] == USB_DT_CS_INTERFACE && 2053 cs_desc[2] == 0xf1 && 2054 cs_desc[3] == 0x02) { 2055 endpoint->in_cables = (1 << cs_desc[4]) - 1; 2056 endpoint->out_cables = (1 << cs_desc[5]) - 1; 2057 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1); 2058 } else if (cs_desc[0] >= 7 && 2059 cs_desc[1] == USB_DT_CS_INTERFACE && 2060 cs_desc[2] == UAC_HEADER) { 2061 return snd_usbmidi_get_ms_info(umidi, endpoint); 2062 } 2063 } 2064 2065 return -ENODEV; 2066 } 2067 2068 /* 2069 * Creates the endpoints and their ports for Midiman devices. 2070 */ 2071 static int snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi *umidi, 2072 struct snd_usb_midi_endpoint_info *endpoint) 2073 { 2074 struct snd_usb_midi_endpoint_info ep_info; 2075 struct usb_interface *intf; 2076 struct usb_host_interface *hostif; 2077 struct usb_interface_descriptor *intfd; 2078 struct usb_endpoint_descriptor *epd; 2079 int cable, err; 2080 2081 intf = umidi->iface; 2082 if (!intf) 2083 return -ENOENT; 2084 hostif = intf->altsetting; 2085 intfd = get_iface_desc(hostif); 2086 /* 2087 * The various MidiSport devices have more or less random endpoint 2088 * numbers, so we have to identify the endpoints by their index in 2089 * the descriptor array, like the driver for that other OS does. 2090 * 2091 * There is one interrupt input endpoint for all input ports, one 2092 * bulk output endpoint for even-numbered ports, and one for odd- 2093 * numbered ports. Both bulk output endpoints have corresponding 2094 * input bulk endpoints (at indices 1 and 3) which aren't used. 2095 */ 2096 if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) { 2097 dev_dbg(&umidi->dev->dev, "not enough endpoints\n"); 2098 return -ENOENT; 2099 } 2100 2101 epd = get_endpoint(hostif, 0); 2102 if (!usb_endpoint_dir_in(epd) || !usb_endpoint_xfer_int(epd)) { 2103 dev_dbg(&umidi->dev->dev, "endpoint[0] isn't interrupt\n"); 2104 return -ENXIO; 2105 } 2106 epd = get_endpoint(hostif, 2); 2107 if (!usb_endpoint_dir_out(epd) || !usb_endpoint_xfer_bulk(epd)) { 2108 dev_dbg(&umidi->dev->dev, "endpoint[2] isn't bulk output\n"); 2109 return -ENXIO; 2110 } 2111 if (endpoint->out_cables > 0x0001) { 2112 epd = get_endpoint(hostif, 4); 2113 if (!usb_endpoint_dir_out(epd) || 2114 !usb_endpoint_xfer_bulk(epd)) { 2115 dev_dbg(&umidi->dev->dev, 2116 "endpoint[4] isn't bulk output\n"); 2117 return -ENXIO; 2118 } 2119 } 2120 2121 ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress & 2122 USB_ENDPOINT_NUMBER_MASK; 2123 ep_info.out_interval = 0; 2124 ep_info.out_cables = endpoint->out_cables & 0x5555; 2125 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, 2126 &umidi->endpoints[0]); 2127 if (err < 0) 2128 return err; 2129 2130 ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress & 2131 USB_ENDPOINT_NUMBER_MASK; 2132 ep_info.in_interval = get_endpoint(hostif, 0)->bInterval; 2133 ep_info.in_cables = endpoint->in_cables; 2134 err = snd_usbmidi_in_endpoint_create(umidi, &ep_info, 2135 &umidi->endpoints[0]); 2136 if (err < 0) 2137 return err; 2138 2139 if (endpoint->out_cables > 0x0001) { 2140 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress & 2141 USB_ENDPOINT_NUMBER_MASK; 2142 ep_info.out_cables = endpoint->out_cables & 0xaaaa; 2143 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, 2144 &umidi->endpoints[1]); 2145 if (err < 0) 2146 return err; 2147 } 2148 2149 for (cable = 0; cable < 0x10; ++cable) { 2150 if (endpoint->out_cables & (1 << cable)) 2151 snd_usbmidi_init_substream(umidi, 2152 SNDRV_RAWMIDI_STREAM_OUTPUT, 2153 cable, 2154 &umidi->endpoints[cable & 1].out->ports[cable].substream); 2155 if (endpoint->in_cables & (1 << cable)) 2156 snd_usbmidi_init_substream(umidi, 2157 SNDRV_RAWMIDI_STREAM_INPUT, 2158 cable, 2159 &umidi->endpoints[0].in->ports[cable].substream); 2160 } 2161 return 0; 2162 } 2163 2164 static struct snd_rawmidi_global_ops snd_usbmidi_ops = { 2165 .get_port_info = snd_usbmidi_get_port_info, 2166 }; 2167 2168 static int snd_usbmidi_create_rawmidi(struct snd_usb_midi *umidi, 2169 int out_ports, int in_ports) 2170 { 2171 struct snd_rawmidi *rmidi; 2172 int err; 2173 2174 err = snd_rawmidi_new(umidi->card, "USB MIDI", 2175 umidi->next_midi_device++, 2176 out_ports, in_ports, &rmidi); 2177 if (err < 0) 2178 return err; 2179 strcpy(rmidi->name, umidi->card->shortname); 2180 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | 2181 SNDRV_RAWMIDI_INFO_INPUT | 2182 SNDRV_RAWMIDI_INFO_DUPLEX; 2183 rmidi->ops = &snd_usbmidi_ops; 2184 rmidi->private_data = umidi; 2185 rmidi->private_free = snd_usbmidi_rawmidi_free; 2186 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 2187 &snd_usbmidi_output_ops); 2188 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 2189 &snd_usbmidi_input_ops); 2190 2191 umidi->rmidi = rmidi; 2192 return 0; 2193 } 2194 2195 /* 2196 * Temporarily stop input. 2197 */ 2198 void snd_usbmidi_input_stop(struct list_head *p) 2199 { 2200 struct snd_usb_midi *umidi; 2201 unsigned int i, j; 2202 2203 umidi = list_entry(p, struct snd_usb_midi, list); 2204 if (!umidi->input_running) 2205 return; 2206 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 2207 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i]; 2208 if (ep->in) 2209 for (j = 0; j < INPUT_URBS; ++j) 2210 usb_kill_urb(ep->in->urbs[j]); 2211 } 2212 umidi->input_running = 0; 2213 } 2214 EXPORT_SYMBOL(snd_usbmidi_input_stop); 2215 2216 static void snd_usbmidi_input_start_ep(struct snd_usb_midi_in_endpoint *ep) 2217 { 2218 unsigned int i; 2219 2220 if (!ep) 2221 return; 2222 for (i = 0; i < INPUT_URBS; ++i) { 2223 struct urb *urb = ep->urbs[i]; 2224 urb->dev = ep->umidi->dev; 2225 snd_usbmidi_submit_urb(urb, GFP_KERNEL); 2226 } 2227 } 2228 2229 /* 2230 * Resume input after a call to snd_usbmidi_input_stop(). 2231 */ 2232 void snd_usbmidi_input_start(struct list_head *p) 2233 { 2234 struct snd_usb_midi *umidi; 2235 int i; 2236 2237 umidi = list_entry(p, struct snd_usb_midi, list); 2238 if (umidi->input_running || !umidi->opened[1]) 2239 return; 2240 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) 2241 snd_usbmidi_input_start_ep(umidi->endpoints[i].in); 2242 umidi->input_running = 1; 2243 } 2244 EXPORT_SYMBOL(snd_usbmidi_input_start); 2245 2246 /* 2247 * Prepare for suspend. Typically called from the USB suspend callback. 2248 */ 2249 void snd_usbmidi_suspend(struct list_head *p) 2250 { 2251 struct snd_usb_midi *umidi; 2252 2253 umidi = list_entry(p, struct snd_usb_midi, list); 2254 mutex_lock(&umidi->mutex); 2255 snd_usbmidi_input_stop(p); 2256 mutex_unlock(&umidi->mutex); 2257 } 2258 EXPORT_SYMBOL(snd_usbmidi_suspend); 2259 2260 /* 2261 * Resume. Typically called from the USB resume callback. 2262 */ 2263 void snd_usbmidi_resume(struct list_head *p) 2264 { 2265 struct snd_usb_midi *umidi; 2266 2267 umidi = list_entry(p, struct snd_usb_midi, list); 2268 mutex_lock(&umidi->mutex); 2269 snd_usbmidi_input_start(p); 2270 mutex_unlock(&umidi->mutex); 2271 } 2272 EXPORT_SYMBOL(snd_usbmidi_resume); 2273 2274 /* 2275 * Creates and registers everything needed for a MIDI streaming interface. 2276 */ 2277 int snd_usbmidi_create(struct snd_card *card, 2278 struct usb_interface *iface, 2279 struct list_head *midi_list, 2280 const struct snd_usb_audio_quirk *quirk) 2281 { 2282 struct snd_usb_midi *umidi; 2283 struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS]; 2284 int out_ports, in_ports; 2285 int i, err; 2286 2287 umidi = kzalloc(sizeof(*umidi), GFP_KERNEL); 2288 if (!umidi) 2289 return -ENOMEM; 2290 umidi->dev = interface_to_usbdev(iface); 2291 umidi->card = card; 2292 umidi->iface = iface; 2293 umidi->quirk = quirk; 2294 umidi->usb_protocol_ops = &snd_usbmidi_standard_ops; 2295 spin_lock_init(&umidi->disc_lock); 2296 init_rwsem(&umidi->disc_rwsem); 2297 mutex_init(&umidi->mutex); 2298 umidi->usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor), 2299 le16_to_cpu(umidi->dev->descriptor.idProduct)); 2300 setup_timer(&umidi->error_timer, snd_usbmidi_error_timer, 2301 (unsigned long)umidi); 2302 2303 /* detect the endpoint(s) to use */ 2304 memset(endpoints, 0, sizeof(endpoints)); 2305 switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) { 2306 case QUIRK_MIDI_STANDARD_INTERFACE: 2307 err = snd_usbmidi_get_ms_info(umidi, endpoints); 2308 if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */ 2309 umidi->usb_protocol_ops = 2310 &snd_usbmidi_maudio_broken_running_status_ops; 2311 break; 2312 case QUIRK_MIDI_US122L: 2313 umidi->usb_protocol_ops = &snd_usbmidi_122l_ops; 2314 /* fall through */ 2315 case QUIRK_MIDI_FIXED_ENDPOINT: 2316 memcpy(&endpoints[0], quirk->data, 2317 sizeof(struct snd_usb_midi_endpoint_info)); 2318 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1); 2319 break; 2320 case QUIRK_MIDI_YAMAHA: 2321 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]); 2322 break; 2323 case QUIRK_MIDI_ROLAND: 2324 err = snd_usbmidi_detect_roland(umidi, &endpoints[0]); 2325 break; 2326 case QUIRK_MIDI_MIDIMAN: 2327 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops; 2328 memcpy(&endpoints[0], quirk->data, 2329 sizeof(struct snd_usb_midi_endpoint_info)); 2330 err = 0; 2331 break; 2332 case QUIRK_MIDI_NOVATION: 2333 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops; 2334 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2335 break; 2336 case QUIRK_MIDI_RAW_BYTES: 2337 umidi->usb_protocol_ops = &snd_usbmidi_raw_ops; 2338 /* 2339 * Interface 1 contains isochronous endpoints, but with the same 2340 * numbers as in interface 0. Since it is interface 1 that the 2341 * USB core has most recently seen, these descriptors are now 2342 * associated with the endpoint numbers. This will foul up our 2343 * attempts to submit bulk/interrupt URBs to the endpoints in 2344 * interface 0, so we have to make sure that the USB core looks 2345 * again at interface 0 by calling usb_set_interface() on it. 2346 */ 2347 if (umidi->usb_id == USB_ID(0x07fd, 0x0001)) /* MOTU Fastlane */ 2348 usb_set_interface(umidi->dev, 0, 0); 2349 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2350 break; 2351 case QUIRK_MIDI_EMAGIC: 2352 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops; 2353 memcpy(&endpoints[0], quirk->data, 2354 sizeof(struct snd_usb_midi_endpoint_info)); 2355 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1); 2356 break; 2357 case QUIRK_MIDI_CME: 2358 umidi->usb_protocol_ops = &snd_usbmidi_cme_ops; 2359 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2360 break; 2361 case QUIRK_MIDI_AKAI: 2362 umidi->usb_protocol_ops = &snd_usbmidi_akai_ops; 2363 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2364 /* endpoint 1 is input-only */ 2365 endpoints[1].out_cables = 0; 2366 break; 2367 case QUIRK_MIDI_FTDI: 2368 umidi->usb_protocol_ops = &snd_usbmidi_ftdi_ops; 2369 2370 /* set baud rate to 31250 (48 MHz / 16 / 96) */ 2371 err = usb_control_msg(umidi->dev, usb_sndctrlpipe(umidi->dev, 0), 2372 3, 0x40, 0x60, 0, NULL, 0, 1000); 2373 if (err < 0) 2374 break; 2375 2376 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2377 break; 2378 default: 2379 dev_err(&umidi->dev->dev, "invalid quirk type %d\n", 2380 quirk->type); 2381 err = -ENXIO; 2382 break; 2383 } 2384 if (err < 0) { 2385 kfree(umidi); 2386 return err; 2387 } 2388 2389 /* create rawmidi device */ 2390 out_ports = 0; 2391 in_ports = 0; 2392 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 2393 out_ports += hweight16(endpoints[i].out_cables); 2394 in_ports += hweight16(endpoints[i].in_cables); 2395 } 2396 err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports); 2397 if (err < 0) { 2398 kfree(umidi); 2399 return err; 2400 } 2401 2402 /* create endpoint/port structures */ 2403 if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN) 2404 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]); 2405 else 2406 err = snd_usbmidi_create_endpoints(umidi, endpoints); 2407 if (err < 0) { 2408 snd_usbmidi_free(umidi); 2409 return err; 2410 } 2411 2412 usb_autopm_get_interface_no_resume(umidi->iface); 2413 2414 list_add_tail(&umidi->list, midi_list); 2415 return 0; 2416 } 2417 EXPORT_SYMBOL(snd_usbmidi_create); 2418