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 76MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>"); 77MODULE_DESCRIPTION("USB Audio/MIDI helper module"); 78MODULE_LICENSE("Dual BSD/GPL"); 79 80 81struct usb_ms_header_descriptor { 82 __u8 bLength; 83 __u8 bDescriptorType; 84 __u8 bDescriptorSubtype; 85 __u8 bcdMSC[2]; 86 __le16 wTotalLength; 87} __attribute__ ((packed)); 88 89struct usb_ms_endpoint_descriptor { 90 __u8 bLength; 91 __u8 bDescriptorType; 92 __u8 bDescriptorSubtype; 93 __u8 bNumEmbMIDIJack; 94 __u8 baAssocJackID[0]; 95} __attribute__ ((packed)); 96 97struct snd_usb_midi_in_endpoint; 98struct snd_usb_midi_out_endpoint; 99struct snd_usb_midi_endpoint; 100 101struct 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 109struct 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 136struct 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 169struct 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 bool in_sysex; 178 u8 last_cin; 179 u8 error_resubmit; 180 int current_port; 181}; 182 183static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep); 184 185static const uint8_t snd_usbmidi_cin_length[] = { 186 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1 187}; 188 189/* 190 * Submits the URB, with error handling. 191 */ 192static int snd_usbmidi_submit_urb(struct urb *urb, gfp_t flags) 193{ 194 int err = usb_submit_urb(urb, flags); 195 if (err < 0 && err != -ENODEV) 196 dev_err(&urb->dev->dev, "usb_submit_urb: %d\n", err); 197 return err; 198} 199 200/* 201 * Error handling for URB completion functions. 202 */ 203static int snd_usbmidi_urb_error(const struct urb *urb) 204{ 205 switch (urb->status) { 206 /* manually unlinked, or device gone */ 207 case -ENOENT: 208 case -ECONNRESET: 209 case -ESHUTDOWN: 210 case -ENODEV: 211 return -ENODEV; 212 /* errors that might occur during unplugging */ 213 case -EPROTO: 214 case -ETIME: 215 case -EILSEQ: 216 return -EIO; 217 default: 218 dev_err(&urb->dev->dev, "urb status %d\n", urb->status); 219 return 0; /* continue */ 220 } 221} 222 223/* 224 * Receives a chunk of MIDI data. 225 */ 226static void snd_usbmidi_input_data(struct snd_usb_midi_in_endpoint *ep, 227 int portidx, uint8_t *data, int length) 228{ 229 struct usbmidi_in_port *port = &ep->ports[portidx]; 230 231 if (!port->substream) { 232 dev_dbg(&ep->umidi->dev->dev, "unexpected port %d!\n", portidx); 233 return; 234 } 235 if (!test_bit(port->substream->number, &ep->umidi->input_triggered)) 236 return; 237 snd_rawmidi_receive(port->substream, data, length); 238} 239 240#ifdef DUMP_PACKETS 241static void dump_urb(const char *type, const u8 *data, int length) 242{ 243 snd_printk(KERN_DEBUG "%s packet: [", type); 244 for (; length > 0; ++data, --length) 245 printk(" %02x", *data); 246 printk(" ]\n"); 247} 248#else 249#define dump_urb(type, data, length) /* nothing */ 250#endif 251 252/* 253 * Processes the data read from the device. 254 */ 255static void snd_usbmidi_in_urb_complete(struct urb *urb) 256{ 257 struct snd_usb_midi_in_endpoint *ep = urb->context; 258 259 if (urb->status == 0) { 260 dump_urb("received", urb->transfer_buffer, urb->actual_length); 261 ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer, 262 urb->actual_length); 263 } else { 264 int err = snd_usbmidi_urb_error(urb); 265 if (err < 0) { 266 if (err != -ENODEV) { 267 ep->error_resubmit = 1; 268 mod_timer(&ep->umidi->error_timer, 269 jiffies + ERROR_DELAY_JIFFIES); 270 } 271 return; 272 } 273 } 274 275 urb->dev = ep->umidi->dev; 276 snd_usbmidi_submit_urb(urb, GFP_ATOMIC); 277} 278 279static void snd_usbmidi_out_urb_complete(struct urb *urb) 280{ 281 struct out_urb_context *context = urb->context; 282 struct snd_usb_midi_out_endpoint *ep = context->ep; 283 unsigned int urb_index; 284 285 spin_lock(&ep->buffer_lock); 286 urb_index = context - ep->urbs; 287 ep->active_urbs &= ~(1 << urb_index); 288 if (unlikely(ep->drain_urbs)) { 289 ep->drain_urbs &= ~(1 << urb_index); 290 wake_up(&ep->drain_wait); 291 } 292 spin_unlock(&ep->buffer_lock); 293 if (urb->status < 0) { 294 int err = snd_usbmidi_urb_error(urb); 295 if (err < 0) { 296 if (err != -ENODEV) 297 mod_timer(&ep->umidi->error_timer, 298 jiffies + ERROR_DELAY_JIFFIES); 299 return; 300 } 301 } 302 snd_usbmidi_do_output(ep); 303} 304 305/* 306 * This is called when some data should be transferred to the device 307 * (from one or more substreams). 308 */ 309static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep) 310{ 311 unsigned int urb_index; 312 struct urb *urb; 313 unsigned long flags; 314 315 spin_lock_irqsave(&ep->buffer_lock, flags); 316 if (ep->umidi->disconnected) { 317 spin_unlock_irqrestore(&ep->buffer_lock, flags); 318 return; 319 } 320 321 urb_index = ep->next_urb; 322 for (;;) { 323 if (!(ep->active_urbs & (1 << urb_index))) { 324 urb = ep->urbs[urb_index].urb; 325 urb->transfer_buffer_length = 0; 326 ep->umidi->usb_protocol_ops->output(ep, urb); 327 if (urb->transfer_buffer_length == 0) 328 break; 329 330 dump_urb("sending", urb->transfer_buffer, 331 urb->transfer_buffer_length); 332 urb->dev = ep->umidi->dev; 333 if (snd_usbmidi_submit_urb(urb, GFP_ATOMIC) < 0) 334 break; 335 ep->active_urbs |= 1 << urb_index; 336 } 337 if (++urb_index >= OUTPUT_URBS) 338 urb_index = 0; 339 if (urb_index == ep->next_urb) 340 break; 341 } 342 ep->next_urb = urb_index; 343 spin_unlock_irqrestore(&ep->buffer_lock, flags); 344} 345 346static void snd_usbmidi_out_tasklet(unsigned long data) 347{ 348 struct snd_usb_midi_out_endpoint *ep = 349 (struct snd_usb_midi_out_endpoint *) data; 350 351 snd_usbmidi_do_output(ep); 352} 353 354/* called after transfers had been interrupted due to some USB error */ 355static void snd_usbmidi_error_timer(unsigned long data) 356{ 357 struct snd_usb_midi *umidi = (struct snd_usb_midi *)data; 358 unsigned int i, j; 359 360 spin_lock(&umidi->disc_lock); 361 if (umidi->disconnected) { 362 spin_unlock(&umidi->disc_lock); 363 return; 364 } 365 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 366 struct snd_usb_midi_in_endpoint *in = umidi->endpoints[i].in; 367 if (in && in->error_resubmit) { 368 in->error_resubmit = 0; 369 for (j = 0; j < INPUT_URBS; ++j) { 370 if (atomic_read(&in->urbs[j]->use_count)) 371 continue; 372 in->urbs[j]->dev = umidi->dev; 373 snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC); 374 } 375 } 376 if (umidi->endpoints[i].out) 377 snd_usbmidi_do_output(umidi->endpoints[i].out); 378 } 379 spin_unlock(&umidi->disc_lock); 380} 381 382/* helper function to send static data that may not DMA-able */ 383static int send_bulk_static_data(struct snd_usb_midi_out_endpoint *ep, 384 const void *data, int len) 385{ 386 int err = 0; 387 void *buf = kmemdup(data, len, GFP_KERNEL); 388 if (!buf) 389 return -ENOMEM; 390 dump_urb("sending", buf, len); 391 if (ep->urbs[0].urb) 392 err = usb_bulk_msg(ep->umidi->dev, ep->urbs[0].urb->pipe, 393 buf, len, NULL, 250); 394 kfree(buf); 395 return err; 396} 397 398/* 399 * Standard USB MIDI protocol: see the spec. 400 * Midiman protocol: like the standard protocol, but the control byte is the 401 * fourth byte in each packet, and uses length instead of CIN. 402 */ 403 404static void snd_usbmidi_standard_input(struct snd_usb_midi_in_endpoint *ep, 405 uint8_t *buffer, int buffer_length) 406{ 407 int i; 408 409 for (i = 0; i + 3 < buffer_length; i += 4) 410 if (buffer[i] != 0) { 411 int cable = buffer[i] >> 4; 412 int length = snd_usbmidi_cin_length[buffer[i] & 0x0f]; 413 snd_usbmidi_input_data(ep, cable, &buffer[i + 1], 414 length); 415 } 416} 417 418static void snd_usbmidi_midiman_input(struct snd_usb_midi_in_endpoint *ep, 419 uint8_t *buffer, int buffer_length) 420{ 421 int i; 422 423 for (i = 0; i + 3 < buffer_length; i += 4) 424 if (buffer[i + 3] != 0) { 425 int port = buffer[i + 3] >> 4; 426 int length = buffer[i + 3] & 3; 427 snd_usbmidi_input_data(ep, port, &buffer[i], length); 428 } 429} 430 431/* 432 * Buggy M-Audio device: running status on input results in a packet that has 433 * the data bytes but not the status byte and that is marked with CIN 4. 434 */ 435static void snd_usbmidi_maudio_broken_running_status_input( 436 struct snd_usb_midi_in_endpoint *ep, 437 uint8_t *buffer, int buffer_length) 438{ 439 int i; 440 441 for (i = 0; i + 3 < buffer_length; i += 4) 442 if (buffer[i] != 0) { 443 int cable = buffer[i] >> 4; 444 u8 cin = buffer[i] & 0x0f; 445 struct usbmidi_in_port *port = &ep->ports[cable]; 446 int length; 447 448 length = snd_usbmidi_cin_length[cin]; 449 if (cin == 0xf && buffer[i + 1] >= 0xf8) 450 ; /* realtime msg: no running status change */ 451 else if (cin >= 0x8 && cin <= 0xe) 452 /* channel msg */ 453 port->running_status_length = length - 1; 454 else if (cin == 0x4 && 455 port->running_status_length != 0 && 456 buffer[i + 1] < 0x80) 457 /* CIN 4 that is not a SysEx */ 458 length = port->running_status_length; 459 else 460 /* 461 * All other msgs cannot begin running status. 462 * (A channel msg sent as two or three CIN 0xF 463 * packets could in theory, but this device 464 * doesn't use this format.) 465 */ 466 port->running_status_length = 0; 467 snd_usbmidi_input_data(ep, cable, &buffer[i + 1], 468 length); 469 } 470} 471 472/* 473 * QinHeng CH345 is buggy: every second packet inside a SysEx has not CIN 4 474 * but the previously seen CIN, but still with three data bytes. 475 */ 476static void ch345_broken_sysex_input(struct snd_usb_midi_in_endpoint *ep, 477 uint8_t *buffer, int buffer_length) 478{ 479 unsigned int i, cin, length; 480 481 for (i = 0; i + 3 < buffer_length; i += 4) { 482 if (buffer[i] == 0 && i > 0) 483 break; 484 cin = buffer[i] & 0x0f; 485 if (ep->in_sysex && 486 cin == ep->last_cin && 487 (buffer[i + 1 + (cin == 0x6)] & 0x80) == 0) 488 cin = 0x4; 489#if 0 490 if (buffer[i + 1] == 0x90) { 491 /* 492 * Either a corrupted running status or a real note-on 493 * message; impossible to detect reliably. 494 */ 495 } 496#endif 497 length = snd_usbmidi_cin_length[cin]; 498 snd_usbmidi_input_data(ep, 0, &buffer[i + 1], length); 499 ep->in_sysex = cin == 0x4; 500 if (!ep->in_sysex) 501 ep->last_cin = cin; 502 } 503} 504 505/* 506 * CME protocol: like the standard protocol, but SysEx commands are sent as a 507 * single USB packet preceded by a 0x0F byte. 508 */ 509static void snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint *ep, 510 uint8_t *buffer, int buffer_length) 511{ 512 if (buffer_length < 2 || (buffer[0] & 0x0f) != 0x0f) 513 snd_usbmidi_standard_input(ep, buffer, buffer_length); 514 else 515 snd_usbmidi_input_data(ep, buffer[0] >> 4, 516 &buffer[1], buffer_length - 1); 517} 518 519/* 520 * Adds one USB MIDI packet to the output buffer. 521 */ 522static void snd_usbmidi_output_standard_packet(struct urb *urb, uint8_t p0, 523 uint8_t p1, uint8_t p2, 524 uint8_t p3) 525{ 526 527 uint8_t *buf = 528 (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length; 529 buf[0] = p0; 530 buf[1] = p1; 531 buf[2] = p2; 532 buf[3] = p3; 533 urb->transfer_buffer_length += 4; 534} 535 536/* 537 * Adds one Midiman packet to the output buffer. 538 */ 539static void snd_usbmidi_output_midiman_packet(struct urb *urb, uint8_t p0, 540 uint8_t p1, uint8_t p2, 541 uint8_t p3) 542{ 543 544 uint8_t *buf = 545 (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length; 546 buf[0] = p1; 547 buf[1] = p2; 548 buf[2] = p3; 549 buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f]; 550 urb->transfer_buffer_length += 4; 551} 552 553/* 554 * Converts MIDI commands to USB MIDI packets. 555 */ 556static void snd_usbmidi_transmit_byte(struct usbmidi_out_port *port, 557 uint8_t b, struct urb *urb) 558{ 559 uint8_t p0 = port->cable; 560 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) = 561 port->ep->umidi->usb_protocol_ops->output_packet; 562 563 if (b >= 0xf8) { 564 output_packet(urb, p0 | 0x0f, b, 0, 0); 565 } else if (b >= 0xf0) { 566 switch (b) { 567 case 0xf0: 568 port->data[0] = b; 569 port->state = STATE_SYSEX_1; 570 break; 571 case 0xf1: 572 case 0xf3: 573 port->data[0] = b; 574 port->state = STATE_1PARAM; 575 break; 576 case 0xf2: 577 port->data[0] = b; 578 port->state = STATE_2PARAM_1; 579 break; 580 case 0xf4: 581 case 0xf5: 582 port->state = STATE_UNKNOWN; 583 break; 584 case 0xf6: 585 output_packet(urb, p0 | 0x05, 0xf6, 0, 0); 586 port->state = STATE_UNKNOWN; 587 break; 588 case 0xf7: 589 switch (port->state) { 590 case STATE_SYSEX_0: 591 output_packet(urb, p0 | 0x05, 0xf7, 0, 0); 592 break; 593 case STATE_SYSEX_1: 594 output_packet(urb, p0 | 0x06, port->data[0], 595 0xf7, 0); 596 break; 597 case STATE_SYSEX_2: 598 output_packet(urb, p0 | 0x07, port->data[0], 599 port->data[1], 0xf7); 600 break; 601 } 602 port->state = STATE_UNKNOWN; 603 break; 604 } 605 } else if (b >= 0x80) { 606 port->data[0] = b; 607 if (b >= 0xc0 && b <= 0xdf) 608 port->state = STATE_1PARAM; 609 else 610 port->state = STATE_2PARAM_1; 611 } else { /* b < 0x80 */ 612 switch (port->state) { 613 case STATE_1PARAM: 614 if (port->data[0] < 0xf0) { 615 p0 |= port->data[0] >> 4; 616 } else { 617 p0 |= 0x02; 618 port->state = STATE_UNKNOWN; 619 } 620 output_packet(urb, p0, port->data[0], b, 0); 621 break; 622 case STATE_2PARAM_1: 623 port->data[1] = b; 624 port->state = STATE_2PARAM_2; 625 break; 626 case STATE_2PARAM_2: 627 if (port->data[0] < 0xf0) { 628 p0 |= port->data[0] >> 4; 629 port->state = STATE_2PARAM_1; 630 } else { 631 p0 |= 0x03; 632 port->state = STATE_UNKNOWN; 633 } 634 output_packet(urb, p0, port->data[0], port->data[1], b); 635 break; 636 case STATE_SYSEX_0: 637 port->data[0] = b; 638 port->state = STATE_SYSEX_1; 639 break; 640 case STATE_SYSEX_1: 641 port->data[1] = b; 642 port->state = STATE_SYSEX_2; 643 break; 644 case STATE_SYSEX_2: 645 output_packet(urb, p0 | 0x04, port->data[0], 646 port->data[1], b); 647 port->state = STATE_SYSEX_0; 648 break; 649 } 650 } 651} 652 653static void snd_usbmidi_standard_output(struct snd_usb_midi_out_endpoint *ep, 654 struct urb *urb) 655{ 656 int p; 657 658 /* FIXME: lower-numbered ports can starve higher-numbered ports */ 659 for (p = 0; p < 0x10; ++p) { 660 struct usbmidi_out_port *port = &ep->ports[p]; 661 if (!port->active) 662 continue; 663 while (urb->transfer_buffer_length + 3 < ep->max_transfer) { 664 uint8_t b; 665 if (snd_rawmidi_transmit(port->substream, &b, 1) != 1) { 666 port->active = 0; 667 break; 668 } 669 snd_usbmidi_transmit_byte(port, b, urb); 670 } 671 } 672} 673 674static struct usb_protocol_ops snd_usbmidi_standard_ops = { 675 .input = snd_usbmidi_standard_input, 676 .output = snd_usbmidi_standard_output, 677 .output_packet = snd_usbmidi_output_standard_packet, 678}; 679 680static struct usb_protocol_ops snd_usbmidi_midiman_ops = { 681 .input = snd_usbmidi_midiman_input, 682 .output = snd_usbmidi_standard_output, 683 .output_packet = snd_usbmidi_output_midiman_packet, 684}; 685 686static struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = { 687 .input = snd_usbmidi_maudio_broken_running_status_input, 688 .output = snd_usbmidi_standard_output, 689 .output_packet = snd_usbmidi_output_standard_packet, 690}; 691 692static struct usb_protocol_ops snd_usbmidi_cme_ops = { 693 .input = snd_usbmidi_cme_input, 694 .output = snd_usbmidi_standard_output, 695 .output_packet = snd_usbmidi_output_standard_packet, 696}; 697 698static struct usb_protocol_ops snd_usbmidi_ch345_broken_sysex_ops = { 699 .input = ch345_broken_sysex_input, 700 .output = snd_usbmidi_standard_output, 701 .output_packet = snd_usbmidi_output_standard_packet, 702}; 703 704/* 705 * AKAI MPD16 protocol: 706 * 707 * For control port (endpoint 1): 708 * ============================== 709 * One or more chunks consisting of first byte of (0x10 | msg_len) and then a 710 * SysEx message (msg_len=9 bytes long). 711 * 712 * For data port (endpoint 2): 713 * =========================== 714 * One or more chunks consisting of first byte of (0x20 | msg_len) and then a 715 * MIDI message (msg_len bytes long) 716 * 717 * Messages sent: Active Sense, Note On, Poly Pressure, Control Change. 718 */ 719static void snd_usbmidi_akai_input(struct snd_usb_midi_in_endpoint *ep, 720 uint8_t *buffer, int buffer_length) 721{ 722 unsigned int pos = 0; 723 unsigned int len = (unsigned int)buffer_length; 724 while (pos < len) { 725 unsigned int port = (buffer[pos] >> 4) - 1; 726 unsigned int msg_len = buffer[pos] & 0x0f; 727 pos++; 728 if (pos + msg_len <= len && port < 2) 729 snd_usbmidi_input_data(ep, 0, &buffer[pos], msg_len); 730 pos += msg_len; 731 } 732} 733 734#define MAX_AKAI_SYSEX_LEN 9 735 736static void snd_usbmidi_akai_output(struct snd_usb_midi_out_endpoint *ep, 737 struct urb *urb) 738{ 739 uint8_t *msg; 740 int pos, end, count, buf_end; 741 uint8_t tmp[MAX_AKAI_SYSEX_LEN]; 742 struct snd_rawmidi_substream *substream = ep->ports[0].substream; 743 744 if (!ep->ports[0].active) 745 return; 746 747 msg = urb->transfer_buffer + urb->transfer_buffer_length; 748 buf_end = ep->max_transfer - MAX_AKAI_SYSEX_LEN - 1; 749 750 /* only try adding more data when there's space for at least 1 SysEx */ 751 while (urb->transfer_buffer_length < buf_end) { 752 count = snd_rawmidi_transmit_peek(substream, 753 tmp, MAX_AKAI_SYSEX_LEN); 754 if (!count) { 755 ep->ports[0].active = 0; 756 return; 757 } 758 /* try to skip non-SysEx data */ 759 for (pos = 0; pos < count && tmp[pos] != 0xF0; pos++) 760 ; 761 762 if (pos > 0) { 763 snd_rawmidi_transmit_ack(substream, pos); 764 continue; 765 } 766 767 /* look for the start or end marker */ 768 for (end = 1; end < count && tmp[end] < 0xF0; end++) 769 ; 770 771 /* next SysEx started before the end of current one */ 772 if (end < count && tmp[end] == 0xF0) { 773 /* it's incomplete - drop it */ 774 snd_rawmidi_transmit_ack(substream, end); 775 continue; 776 } 777 /* SysEx complete */ 778 if (end < count && tmp[end] == 0xF7) { 779 /* queue it, ack it, and get the next one */ 780 count = end + 1; 781 msg[0] = 0x10 | count; 782 memcpy(&msg[1], tmp, count); 783 snd_rawmidi_transmit_ack(substream, count); 784 urb->transfer_buffer_length += count + 1; 785 msg += count + 1; 786 continue; 787 } 788 /* less than 9 bytes and no end byte - wait for more */ 789 if (count < MAX_AKAI_SYSEX_LEN) { 790 ep->ports[0].active = 0; 791 return; 792 } 793 /* 9 bytes and no end marker in sight - malformed, skip it */ 794 snd_rawmidi_transmit_ack(substream, count); 795 } 796} 797 798static struct usb_protocol_ops snd_usbmidi_akai_ops = { 799 .input = snd_usbmidi_akai_input, 800 .output = snd_usbmidi_akai_output, 801}; 802 803/* 804 * Novation USB MIDI protocol: number of data bytes is in the first byte 805 * (when receiving) (+1!) or in the second byte (when sending); data begins 806 * at the third byte. 807 */ 808 809static void snd_usbmidi_novation_input(struct snd_usb_midi_in_endpoint *ep, 810 uint8_t *buffer, int buffer_length) 811{ 812 if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1) 813 return; 814 snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1); 815} 816 817static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint *ep, 818 struct urb *urb) 819{ 820 uint8_t *transfer_buffer; 821 int count; 822 823 if (!ep->ports[0].active) 824 return; 825 transfer_buffer = urb->transfer_buffer; 826 count = snd_rawmidi_transmit(ep->ports[0].substream, 827 &transfer_buffer[2], 828 ep->max_transfer - 2); 829 if (count < 1) { 830 ep->ports[0].active = 0; 831 return; 832 } 833 transfer_buffer[0] = 0; 834 transfer_buffer[1] = count; 835 urb->transfer_buffer_length = 2 + count; 836} 837 838static struct usb_protocol_ops snd_usbmidi_novation_ops = { 839 .input = snd_usbmidi_novation_input, 840 .output = snd_usbmidi_novation_output, 841}; 842 843/* 844 * "raw" protocol: just move raw MIDI bytes from/to the endpoint 845 */ 846 847static void snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint *ep, 848 uint8_t *buffer, int buffer_length) 849{ 850 snd_usbmidi_input_data(ep, 0, buffer, buffer_length); 851} 852 853static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint *ep, 854 struct urb *urb) 855{ 856 int count; 857 858 if (!ep->ports[0].active) 859 return; 860 count = snd_rawmidi_transmit(ep->ports[0].substream, 861 urb->transfer_buffer, 862 ep->max_transfer); 863 if (count < 1) { 864 ep->ports[0].active = 0; 865 return; 866 } 867 urb->transfer_buffer_length = count; 868} 869 870static struct usb_protocol_ops snd_usbmidi_raw_ops = { 871 .input = snd_usbmidi_raw_input, 872 .output = snd_usbmidi_raw_output, 873}; 874 875/* 876 * FTDI protocol: raw MIDI bytes, but input packets have two modem status bytes. 877 */ 878 879static void snd_usbmidi_ftdi_input(struct snd_usb_midi_in_endpoint *ep, 880 uint8_t *buffer, int buffer_length) 881{ 882 if (buffer_length > 2) 883 snd_usbmidi_input_data(ep, 0, buffer + 2, buffer_length - 2); 884} 885 886static struct usb_protocol_ops snd_usbmidi_ftdi_ops = { 887 .input = snd_usbmidi_ftdi_input, 888 .output = snd_usbmidi_raw_output, 889}; 890 891static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep, 892 uint8_t *buffer, int buffer_length) 893{ 894 if (buffer_length != 9) 895 return; 896 buffer_length = 8; 897 while (buffer_length && buffer[buffer_length - 1] == 0xFD) 898 buffer_length--; 899 if (buffer_length) 900 snd_usbmidi_input_data(ep, 0, buffer, buffer_length); 901} 902 903static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep, 904 struct urb *urb) 905{ 906 int count; 907 908 if (!ep->ports[0].active) 909 return; 910 switch (snd_usb_get_speed(ep->umidi->dev)) { 911 case USB_SPEED_HIGH: 912 case USB_SPEED_SUPER: 913 count = 1; 914 break; 915 default: 916 count = 2; 917 } 918 count = snd_rawmidi_transmit(ep->ports[0].substream, 919 urb->transfer_buffer, 920 count); 921 if (count < 1) { 922 ep->ports[0].active = 0; 923 return; 924 } 925 926 memset(urb->transfer_buffer + count, 0xFD, ep->max_transfer - count); 927 urb->transfer_buffer_length = ep->max_transfer; 928} 929 930static struct usb_protocol_ops snd_usbmidi_122l_ops = { 931 .input = snd_usbmidi_us122l_input, 932 .output = snd_usbmidi_us122l_output, 933}; 934 935/* 936 * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching. 937 */ 938 939static void snd_usbmidi_emagic_init_out(struct snd_usb_midi_out_endpoint *ep) 940{ 941 static const u8 init_data[] = { 942 /* initialization magic: "get version" */ 943 0xf0, 944 0x00, 0x20, 0x31, /* Emagic */ 945 0x64, /* Unitor8 */ 946 0x0b, /* version number request */ 947 0x00, /* command version */ 948 0x00, /* EEPROM, box 0 */ 949 0xf7 950 }; 951 send_bulk_static_data(ep, init_data, sizeof(init_data)); 952 /* while we're at it, pour on more magic */ 953 send_bulk_static_data(ep, init_data, sizeof(init_data)); 954} 955 956static void snd_usbmidi_emagic_finish_out(struct snd_usb_midi_out_endpoint *ep) 957{ 958 static const u8 finish_data[] = { 959 /* switch to patch mode with last preset */ 960 0xf0, 961 0x00, 0x20, 0x31, /* Emagic */ 962 0x64, /* Unitor8 */ 963 0x10, /* patch switch command */ 964 0x00, /* command version */ 965 0x7f, /* to all boxes */ 966 0x40, /* last preset in EEPROM */ 967 0xf7 968 }; 969 send_bulk_static_data(ep, finish_data, sizeof(finish_data)); 970} 971 972static void snd_usbmidi_emagic_input(struct snd_usb_midi_in_endpoint *ep, 973 uint8_t *buffer, int buffer_length) 974{ 975 int i; 976 977 /* FF indicates end of valid data */ 978 for (i = 0; i < buffer_length; ++i) 979 if (buffer[i] == 0xff) { 980 buffer_length = i; 981 break; 982 } 983 984 /* handle F5 at end of last buffer */ 985 if (ep->seen_f5) 986 goto switch_port; 987 988 while (buffer_length > 0) { 989 /* determine size of data until next F5 */ 990 for (i = 0; i < buffer_length; ++i) 991 if (buffer[i] == 0xf5) 992 break; 993 snd_usbmidi_input_data(ep, ep->current_port, buffer, i); 994 buffer += i; 995 buffer_length -= i; 996 997 if (buffer_length <= 0) 998 break; 999 /* assert(buffer[0] == 0xf5); */ 1000 ep->seen_f5 = 1; 1001 ++buffer; 1002 --buffer_length; 1003 1004 switch_port: 1005 if (buffer_length <= 0) 1006 break; 1007 if (buffer[0] < 0x80) { 1008 ep->current_port = (buffer[0] - 1) & 15; 1009 ++buffer; 1010 --buffer_length; 1011 } 1012 ep->seen_f5 = 0; 1013 } 1014} 1015 1016static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint *ep, 1017 struct urb *urb) 1018{ 1019 int port0 = ep->current_port; 1020 uint8_t *buf = urb->transfer_buffer; 1021 int buf_free = ep->max_transfer; 1022 int length, i; 1023 1024 for (i = 0; i < 0x10; ++i) { 1025 /* round-robin, starting at the last current port */ 1026 int portnum = (port0 + i) & 15; 1027 struct usbmidi_out_port *port = &ep->ports[portnum]; 1028 1029 if (!port->active) 1030 continue; 1031 if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) { 1032 port->active = 0; 1033 continue; 1034 } 1035 1036 if (portnum != ep->current_port) { 1037 if (buf_free < 2) 1038 break; 1039 ep->current_port = portnum; 1040 buf[0] = 0xf5; 1041 buf[1] = (portnum + 1) & 15; 1042 buf += 2; 1043 buf_free -= 2; 1044 } 1045 1046 if (buf_free < 1) 1047 break; 1048 length = snd_rawmidi_transmit(port->substream, buf, buf_free); 1049 if (length > 0) { 1050 buf += length; 1051 buf_free -= length; 1052 if (buf_free < 1) 1053 break; 1054 } 1055 } 1056 if (buf_free < ep->max_transfer && buf_free > 0) { 1057 *buf = 0xff; 1058 --buf_free; 1059 } 1060 urb->transfer_buffer_length = ep->max_transfer - buf_free; 1061} 1062 1063static struct usb_protocol_ops snd_usbmidi_emagic_ops = { 1064 .input = snd_usbmidi_emagic_input, 1065 .output = snd_usbmidi_emagic_output, 1066 .init_out_endpoint = snd_usbmidi_emagic_init_out, 1067 .finish_out_endpoint = snd_usbmidi_emagic_finish_out, 1068}; 1069 1070 1071static void update_roland_altsetting(struct snd_usb_midi *umidi) 1072{ 1073 struct usb_interface *intf; 1074 struct usb_host_interface *hostif; 1075 struct usb_interface_descriptor *intfd; 1076 int is_light_load; 1077 1078 intf = umidi->iface; 1079 is_light_load = intf->cur_altsetting != intf->altsetting; 1080 if (umidi->roland_load_ctl->private_value == is_light_load) 1081 return; 1082 hostif = &intf->altsetting[umidi->roland_load_ctl->private_value]; 1083 intfd = get_iface_desc(hostif); 1084 snd_usbmidi_input_stop(&umidi->list); 1085 usb_set_interface(umidi->dev, intfd->bInterfaceNumber, 1086 intfd->bAlternateSetting); 1087 snd_usbmidi_input_start(&umidi->list); 1088} 1089 1090static int substream_open(struct snd_rawmidi_substream *substream, int dir, 1091 int open) 1092{ 1093 struct snd_usb_midi *umidi = substream->rmidi->private_data; 1094 struct snd_kcontrol *ctl; 1095 1096 down_read(&umidi->disc_rwsem); 1097 if (umidi->disconnected) { 1098 up_read(&umidi->disc_rwsem); 1099 return open ? -ENODEV : 0; 1100 } 1101 1102 mutex_lock(&umidi->mutex); 1103 if (open) { 1104 if (!umidi->opened[0] && !umidi->opened[1]) { 1105 if (umidi->roland_load_ctl) { 1106 ctl = umidi->roland_load_ctl; 1107 ctl->vd[0].access |= 1108 SNDRV_CTL_ELEM_ACCESS_INACTIVE; 1109 snd_ctl_notify(umidi->card, 1110 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id); 1111 update_roland_altsetting(umidi); 1112 } 1113 } 1114 umidi->opened[dir]++; 1115 if (umidi->opened[1]) 1116 snd_usbmidi_input_start(&umidi->list); 1117 } else { 1118 umidi->opened[dir]--; 1119 if (!umidi->opened[1]) 1120 snd_usbmidi_input_stop(&umidi->list); 1121 if (!umidi->opened[0] && !umidi->opened[1]) { 1122 if (umidi->roland_load_ctl) { 1123 ctl = umidi->roland_load_ctl; 1124 ctl->vd[0].access &= 1125 ~SNDRV_CTL_ELEM_ACCESS_INACTIVE; 1126 snd_ctl_notify(umidi->card, 1127 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id); 1128 } 1129 } 1130 } 1131 mutex_unlock(&umidi->mutex); 1132 up_read(&umidi->disc_rwsem); 1133 return 0; 1134} 1135 1136static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream) 1137{ 1138 struct snd_usb_midi *umidi = substream->rmidi->private_data; 1139 struct usbmidi_out_port *port = NULL; 1140 int i, j; 1141 1142 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) 1143 if (umidi->endpoints[i].out) 1144 for (j = 0; j < 0x10; ++j) 1145 if (umidi->endpoints[i].out->ports[j].substream == substream) { 1146 port = &umidi->endpoints[i].out->ports[j]; 1147 break; 1148 } 1149 if (!port) { 1150 snd_BUG(); 1151 return -ENXIO; 1152 } 1153 1154 substream->runtime->private_data = port; 1155 port->state = STATE_UNKNOWN; 1156 return substream_open(substream, 0, 1); 1157} 1158 1159static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream) 1160{ 1161 return substream_open(substream, 0, 0); 1162} 1163 1164static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream, 1165 int up) 1166{ 1167 struct usbmidi_out_port *port = 1168 (struct usbmidi_out_port *)substream->runtime->private_data; 1169 1170 port->active = up; 1171 if (up) { 1172 if (port->ep->umidi->disconnected) { 1173 /* gobble up remaining bytes to prevent wait in 1174 * snd_rawmidi_drain_output */ 1175 while (!snd_rawmidi_transmit_empty(substream)) 1176 snd_rawmidi_transmit_ack(substream, 1); 1177 return; 1178 } 1179 tasklet_schedule(&port->ep->tasklet); 1180 } 1181} 1182 1183static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream) 1184{ 1185 struct usbmidi_out_port *port = substream->runtime->private_data; 1186 struct snd_usb_midi_out_endpoint *ep = port->ep; 1187 unsigned int drain_urbs; 1188 DEFINE_WAIT(wait); 1189 long timeout = msecs_to_jiffies(50); 1190 1191 if (ep->umidi->disconnected) 1192 return; 1193 /* 1194 * The substream buffer is empty, but some data might still be in the 1195 * currently active URBs, so we have to wait for those to complete. 1196 */ 1197 spin_lock_irq(&ep->buffer_lock); 1198 drain_urbs = ep->active_urbs; 1199 if (drain_urbs) { 1200 ep->drain_urbs |= drain_urbs; 1201 do { 1202 prepare_to_wait(&ep->drain_wait, &wait, 1203 TASK_UNINTERRUPTIBLE); 1204 spin_unlock_irq(&ep->buffer_lock); 1205 timeout = schedule_timeout(timeout); 1206 spin_lock_irq(&ep->buffer_lock); 1207 drain_urbs &= ep->drain_urbs; 1208 } while (drain_urbs && timeout); 1209 finish_wait(&ep->drain_wait, &wait); 1210 } 1211 spin_unlock_irq(&ep->buffer_lock); 1212} 1213 1214static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream) 1215{ 1216 return substream_open(substream, 1, 1); 1217} 1218 1219static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream) 1220{ 1221 return substream_open(substream, 1, 0); 1222} 1223 1224static void snd_usbmidi_input_trigger(struct snd_rawmidi_substream *substream, 1225 int up) 1226{ 1227 struct snd_usb_midi *umidi = substream->rmidi->private_data; 1228 1229 if (up) 1230 set_bit(substream->number, &umidi->input_triggered); 1231 else 1232 clear_bit(substream->number, &umidi->input_triggered); 1233} 1234 1235static struct snd_rawmidi_ops snd_usbmidi_output_ops = { 1236 .open = snd_usbmidi_output_open, 1237 .close = snd_usbmidi_output_close, 1238 .trigger = snd_usbmidi_output_trigger, 1239 .drain = snd_usbmidi_output_drain, 1240}; 1241 1242static struct snd_rawmidi_ops snd_usbmidi_input_ops = { 1243 .open = snd_usbmidi_input_open, 1244 .close = snd_usbmidi_input_close, 1245 .trigger = snd_usbmidi_input_trigger 1246}; 1247 1248static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb, 1249 unsigned int buffer_length) 1250{ 1251 usb_free_coherent(umidi->dev, buffer_length, 1252 urb->transfer_buffer, urb->transfer_dma); 1253 usb_free_urb(urb); 1254} 1255 1256/* 1257 * Frees an input endpoint. 1258 * May be called when ep hasn't been initialized completely. 1259 */ 1260static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint *ep) 1261{ 1262 unsigned int i; 1263 1264 for (i = 0; i < INPUT_URBS; ++i) 1265 if (ep->urbs[i]) 1266 free_urb_and_buffer(ep->umidi, ep->urbs[i], 1267 ep->urbs[i]->transfer_buffer_length); 1268 kfree(ep); 1269} 1270 1271/* 1272 * Creates an input endpoint. 1273 */ 1274static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi *umidi, 1275 struct snd_usb_midi_endpoint_info *ep_info, 1276 struct snd_usb_midi_endpoint *rep) 1277{ 1278 struct snd_usb_midi_in_endpoint *ep; 1279 void *buffer; 1280 unsigned int pipe; 1281 int length; 1282 unsigned int i; 1283 1284 rep->in = NULL; 1285 ep = kzalloc(sizeof(*ep), GFP_KERNEL); 1286 if (!ep) 1287 return -ENOMEM; 1288 ep->umidi = umidi; 1289 1290 for (i = 0; i < INPUT_URBS; ++i) { 1291 ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL); 1292 if (!ep->urbs[i]) { 1293 snd_usbmidi_in_endpoint_delete(ep); 1294 return -ENOMEM; 1295 } 1296 } 1297 if (ep_info->in_interval) 1298 pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep); 1299 else 1300 pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep); 1301 length = usb_maxpacket(umidi->dev, pipe, 0); 1302 for (i = 0; i < INPUT_URBS; ++i) { 1303 buffer = usb_alloc_coherent(umidi->dev, length, GFP_KERNEL, 1304 &ep->urbs[i]->transfer_dma); 1305 if (!buffer) { 1306 snd_usbmidi_in_endpoint_delete(ep); 1307 return -ENOMEM; 1308 } 1309 if (ep_info->in_interval) 1310 usb_fill_int_urb(ep->urbs[i], umidi->dev, 1311 pipe, buffer, length, 1312 snd_usbmidi_in_urb_complete, 1313 ep, ep_info->in_interval); 1314 else 1315 usb_fill_bulk_urb(ep->urbs[i], umidi->dev, 1316 pipe, buffer, length, 1317 snd_usbmidi_in_urb_complete, ep); 1318 ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP; 1319 } 1320 1321 rep->in = ep; 1322 return 0; 1323} 1324 1325/* 1326 * Frees an output endpoint. 1327 * May be called when ep hasn't been initialized completely. 1328 */ 1329static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep) 1330{ 1331 unsigned int i; 1332 1333 for (i = 0; i < OUTPUT_URBS; ++i) 1334 if (ep->urbs[i].urb) { 1335 free_urb_and_buffer(ep->umidi, ep->urbs[i].urb, 1336 ep->max_transfer); 1337 ep->urbs[i].urb = NULL; 1338 } 1339} 1340 1341static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep) 1342{ 1343 snd_usbmidi_out_endpoint_clear(ep); 1344 kfree(ep); 1345} 1346 1347/* 1348 * Creates an output endpoint, and initializes output ports. 1349 */ 1350static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi *umidi, 1351 struct snd_usb_midi_endpoint_info *ep_info, 1352 struct snd_usb_midi_endpoint *rep) 1353{ 1354 struct snd_usb_midi_out_endpoint *ep; 1355 unsigned int i; 1356 unsigned int pipe; 1357 void *buffer; 1358 1359 rep->out = NULL; 1360 ep = kzalloc(sizeof(*ep), GFP_KERNEL); 1361 if (!ep) 1362 return -ENOMEM; 1363 ep->umidi = umidi; 1364 1365 for (i = 0; i < OUTPUT_URBS; ++i) { 1366 ep->urbs[i].urb = usb_alloc_urb(0, GFP_KERNEL); 1367 if (!ep->urbs[i].urb) { 1368 snd_usbmidi_out_endpoint_delete(ep); 1369 return -ENOMEM; 1370 } 1371 ep->urbs[i].ep = ep; 1372 } 1373 if (ep_info->out_interval) 1374 pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep); 1375 else 1376 pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep); 1377 switch (umidi->usb_id) { 1378 default: 1379 ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1); 1380 break; 1381 /* 1382 * Various chips declare a packet size larger than 4 bytes, but 1383 * do not actually work with larger packets: 1384 */ 1385 case USB_ID(0x0a67, 0x5011): /* Medeli DD305 */ 1386 case USB_ID(0x0a92, 0x1020): /* ESI M4U */ 1387 case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */ 1388 case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */ 1389 case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */ 1390 case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */ 1391 case USB_ID(0xfc08, 0x0101): /* Unknown vendor Cable */ 1392 ep->max_transfer = 4; 1393 break; 1394 /* 1395 * Some devices only work with 9 bytes packet size: 1396 */ 1397 case USB_ID(0x0644, 0x800E): /* Tascam US-122L */ 1398 case USB_ID(0x0644, 0x800F): /* Tascam US-144 */ 1399 ep->max_transfer = 9; 1400 break; 1401 } 1402 for (i = 0; i < OUTPUT_URBS; ++i) { 1403 buffer = usb_alloc_coherent(umidi->dev, 1404 ep->max_transfer, GFP_KERNEL, 1405 &ep->urbs[i].urb->transfer_dma); 1406 if (!buffer) { 1407 snd_usbmidi_out_endpoint_delete(ep); 1408 return -ENOMEM; 1409 } 1410 if (ep_info->out_interval) 1411 usb_fill_int_urb(ep->urbs[i].urb, umidi->dev, 1412 pipe, buffer, ep->max_transfer, 1413 snd_usbmidi_out_urb_complete, 1414 &ep->urbs[i], ep_info->out_interval); 1415 else 1416 usb_fill_bulk_urb(ep->urbs[i].urb, umidi->dev, 1417 pipe, buffer, ep->max_transfer, 1418 snd_usbmidi_out_urb_complete, 1419 &ep->urbs[i]); 1420 ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; 1421 } 1422 1423 spin_lock_init(&ep->buffer_lock); 1424 tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep); 1425 init_waitqueue_head(&ep->drain_wait); 1426 1427 for (i = 0; i < 0x10; ++i) 1428 if (ep_info->out_cables & (1 << i)) { 1429 ep->ports[i].ep = ep; 1430 ep->ports[i].cable = i << 4; 1431 } 1432 1433 if (umidi->usb_protocol_ops->init_out_endpoint) 1434 umidi->usb_protocol_ops->init_out_endpoint(ep); 1435 1436 rep->out = ep; 1437 return 0; 1438} 1439 1440/* 1441 * Frees everything. 1442 */ 1443static void snd_usbmidi_free(struct snd_usb_midi *umidi) 1444{ 1445 int i; 1446 1447 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 1448 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i]; 1449 if (ep->out) 1450 snd_usbmidi_out_endpoint_delete(ep->out); 1451 if (ep->in) 1452 snd_usbmidi_in_endpoint_delete(ep->in); 1453 } 1454 mutex_destroy(&umidi->mutex); 1455 kfree(umidi); 1456} 1457 1458/* 1459 * Unlinks all URBs (must be done before the usb_device is deleted). 1460 */ 1461void snd_usbmidi_disconnect(struct list_head *p) 1462{ 1463 struct snd_usb_midi *umidi; 1464 unsigned int i, j; 1465 1466 umidi = list_entry(p, struct snd_usb_midi, list); 1467 /* 1468 * an URB's completion handler may start the timer and 1469 * a timer may submit an URB. To reliably break the cycle 1470 * a flag under lock must be used 1471 */ 1472 down_write(&umidi->disc_rwsem); 1473 spin_lock_irq(&umidi->disc_lock); 1474 umidi->disconnected = 1; 1475 spin_unlock_irq(&umidi->disc_lock); 1476 up_write(&umidi->disc_rwsem); 1477 1478 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 1479 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i]; 1480 if (ep->out) 1481 tasklet_kill(&ep->out->tasklet); 1482 if (ep->out) { 1483 for (j = 0; j < OUTPUT_URBS; ++j) 1484 usb_kill_urb(ep->out->urbs[j].urb); 1485 if (umidi->usb_protocol_ops->finish_out_endpoint) 1486 umidi->usb_protocol_ops->finish_out_endpoint(ep->out); 1487 ep->out->active_urbs = 0; 1488 if (ep->out->drain_urbs) { 1489 ep->out->drain_urbs = 0; 1490 wake_up(&ep->out->drain_wait); 1491 } 1492 } 1493 if (ep->in) 1494 for (j = 0; j < INPUT_URBS; ++j) 1495 usb_kill_urb(ep->in->urbs[j]); 1496 /* free endpoints here; later call can result in Oops */ 1497 if (ep->out) 1498 snd_usbmidi_out_endpoint_clear(ep->out); 1499 if (ep->in) { 1500 snd_usbmidi_in_endpoint_delete(ep->in); 1501 ep->in = NULL; 1502 } 1503 } 1504 del_timer_sync(&umidi->error_timer); 1505} 1506EXPORT_SYMBOL(snd_usbmidi_disconnect); 1507 1508static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi) 1509{ 1510 struct snd_usb_midi *umidi = rmidi->private_data; 1511 snd_usbmidi_free(umidi); 1512} 1513 1514static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi *umidi, 1515 int stream, 1516 int number) 1517{ 1518 struct snd_rawmidi_substream *substream; 1519 1520 list_for_each_entry(substream, &umidi->rmidi->streams[stream].substreams, 1521 list) { 1522 if (substream->number == number) 1523 return substream; 1524 } 1525 return NULL; 1526} 1527 1528/* 1529 * This list specifies names for ports that do not fit into the standard 1530 * "(product) MIDI (n)" schema because they aren't external MIDI ports, 1531 * such as internal control or synthesizer ports. 1532 */ 1533static struct port_info { 1534 u32 id; 1535 short int port; 1536 short int voices; 1537 const char *name; 1538 unsigned int seq_flags; 1539} snd_usbmidi_port_info[] = { 1540#define PORT_INFO(vendor, product, num, name_, voices_, flags) \ 1541 { .id = USB_ID(vendor, product), \ 1542 .port = num, .voices = voices_, \ 1543 .name = name_, .seq_flags = flags } 1544#define EXTERNAL_PORT(vendor, product, num, name) \ 1545 PORT_INFO(vendor, product, num, name, 0, \ 1546 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1547 SNDRV_SEQ_PORT_TYPE_HARDWARE | \ 1548 SNDRV_SEQ_PORT_TYPE_PORT) 1549#define CONTROL_PORT(vendor, product, num, name) \ 1550 PORT_INFO(vendor, product, num, name, 0, \ 1551 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1552 SNDRV_SEQ_PORT_TYPE_HARDWARE) 1553#define GM_SYNTH_PORT(vendor, product, num, name, voices) \ 1554 PORT_INFO(vendor, product, num, name, voices, \ 1555 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1556 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \ 1557 SNDRV_SEQ_PORT_TYPE_HARDWARE | \ 1558 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER) 1559#define ROLAND_SYNTH_PORT(vendor, product, num, name, voices) \ 1560 PORT_INFO(vendor, product, num, name, voices, \ 1561 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1562 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \ 1563 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \ 1564 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \ 1565 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \ 1566 SNDRV_SEQ_PORT_TYPE_HARDWARE | \ 1567 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER) 1568#define SOUNDCANVAS_PORT(vendor, product, num, name, voices) \ 1569 PORT_INFO(vendor, product, num, name, voices, \ 1570 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1571 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \ 1572 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \ 1573 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \ 1574 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \ 1575 SNDRV_SEQ_PORT_TYPE_MIDI_MT32 | \ 1576 SNDRV_SEQ_PORT_TYPE_HARDWARE | \ 1577 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER) 1578 /* Yamaha MOTIF XF */ 1579 GM_SYNTH_PORT(0x0499, 0x105c, 0, "%s Tone Generator", 128), 1580 CONTROL_PORT(0x0499, 0x105c, 1, "%s Remote Control"), 1581 EXTERNAL_PORT(0x0499, 0x105c, 2, "%s Thru"), 1582 CONTROL_PORT(0x0499, 0x105c, 3, "%s Editor"), 1583 /* Roland UA-100 */ 1584 CONTROL_PORT(0x0582, 0x0000, 2, "%s Control"), 1585 /* Roland SC-8850 */ 1586 SOUNDCANVAS_PORT(0x0582, 0x0003, 0, "%s Part A", 128), 1587 SOUNDCANVAS_PORT(0x0582, 0x0003, 1, "%s Part B", 128), 1588 SOUNDCANVAS_PORT(0x0582, 0x0003, 2, "%s Part C", 128), 1589 SOUNDCANVAS_PORT(0x0582, 0x0003, 3, "%s Part D", 128), 1590 EXTERNAL_PORT(0x0582, 0x0003, 4, "%s MIDI 1"), 1591 EXTERNAL_PORT(0x0582, 0x0003, 5, "%s MIDI 2"), 1592 /* Roland U-8 */ 1593 EXTERNAL_PORT(0x0582, 0x0004, 0, "%s MIDI"), 1594 CONTROL_PORT(0x0582, 0x0004, 1, "%s Control"), 1595 /* Roland SC-8820 */ 1596 SOUNDCANVAS_PORT(0x0582, 0x0007, 0, "%s Part A", 64), 1597 SOUNDCANVAS_PORT(0x0582, 0x0007, 1, "%s Part B", 64), 1598 EXTERNAL_PORT(0x0582, 0x0007, 2, "%s MIDI"), 1599 /* Roland SK-500 */ 1600 SOUNDCANVAS_PORT(0x0582, 0x000b, 0, "%s Part A", 64), 1601 SOUNDCANVAS_PORT(0x0582, 0x000b, 1, "%s Part B", 64), 1602 EXTERNAL_PORT(0x0582, 0x000b, 2, "%s MIDI"), 1603 /* Roland SC-D70 */ 1604 SOUNDCANVAS_PORT(0x0582, 0x000c, 0, "%s Part A", 64), 1605 SOUNDCANVAS_PORT(0x0582, 0x000c, 1, "%s Part B", 64), 1606 EXTERNAL_PORT(0x0582, 0x000c, 2, "%s MIDI"), 1607 /* Edirol UM-880 */ 1608 CONTROL_PORT(0x0582, 0x0014, 8, "%s Control"), 1609 /* Edirol SD-90 */ 1610 ROLAND_SYNTH_PORT(0x0582, 0x0016, 0, "%s Part A", 128), 1611 ROLAND_SYNTH_PORT(0x0582, 0x0016, 1, "%s Part B", 128), 1612 EXTERNAL_PORT(0x0582, 0x0016, 2, "%s MIDI 1"), 1613 EXTERNAL_PORT(0x0582, 0x0016, 3, "%s MIDI 2"), 1614 /* Edirol UM-550 */ 1615 CONTROL_PORT(0x0582, 0x0023, 5, "%s Control"), 1616 /* Edirol SD-20 */ 1617 ROLAND_SYNTH_PORT(0x0582, 0x0027, 0, "%s Part A", 64), 1618 ROLAND_SYNTH_PORT(0x0582, 0x0027, 1, "%s Part B", 64), 1619 EXTERNAL_PORT(0x0582, 0x0027, 2, "%s MIDI"), 1620 /* Edirol SD-80 */ 1621 ROLAND_SYNTH_PORT(0x0582, 0x0029, 0, "%s Part A", 128), 1622 ROLAND_SYNTH_PORT(0x0582, 0x0029, 1, "%s Part B", 128), 1623 EXTERNAL_PORT(0x0582, 0x0029, 2, "%s MIDI 1"), 1624 EXTERNAL_PORT(0x0582, 0x0029, 3, "%s MIDI 2"), 1625 /* Edirol UA-700 */ 1626 EXTERNAL_PORT(0x0582, 0x002b, 0, "%s MIDI"), 1627 CONTROL_PORT(0x0582, 0x002b, 1, "%s Control"), 1628 /* Roland VariOS */ 1629 EXTERNAL_PORT(0x0582, 0x002f, 0, "%s MIDI"), 1630 EXTERNAL_PORT(0x0582, 0x002f, 1, "%s External MIDI"), 1631 EXTERNAL_PORT(0x0582, 0x002f, 2, "%s Sync"), 1632 /* Edirol PCR */ 1633 EXTERNAL_PORT(0x0582, 0x0033, 0, "%s MIDI"), 1634 EXTERNAL_PORT(0x0582, 0x0033, 1, "%s 1"), 1635 EXTERNAL_PORT(0x0582, 0x0033, 2, "%s 2"), 1636 /* BOSS GS-10 */ 1637 EXTERNAL_PORT(0x0582, 0x003b, 0, "%s MIDI"), 1638 CONTROL_PORT(0x0582, 0x003b, 1, "%s Control"), 1639 /* Edirol UA-1000 */ 1640 EXTERNAL_PORT(0x0582, 0x0044, 0, "%s MIDI"), 1641 CONTROL_PORT(0x0582, 0x0044, 1, "%s Control"), 1642 /* Edirol UR-80 */ 1643 EXTERNAL_PORT(0x0582, 0x0048, 0, "%s MIDI"), 1644 EXTERNAL_PORT(0x0582, 0x0048, 1, "%s 1"), 1645 EXTERNAL_PORT(0x0582, 0x0048, 2, "%s 2"), 1646 /* Edirol PCR-A */ 1647 EXTERNAL_PORT(0x0582, 0x004d, 0, "%s MIDI"), 1648 EXTERNAL_PORT(0x0582, 0x004d, 1, "%s 1"), 1649 EXTERNAL_PORT(0x0582, 0x004d, 2, "%s 2"), 1650 /* BOSS GT-PRO */ 1651 CONTROL_PORT(0x0582, 0x0089, 0, "%s Control"), 1652 /* Edirol UM-3EX */ 1653 CONTROL_PORT(0x0582, 0x009a, 3, "%s Control"), 1654 /* Roland VG-99 */ 1655 CONTROL_PORT(0x0582, 0x00b2, 0, "%s Control"), 1656 EXTERNAL_PORT(0x0582, 0x00b2, 1, "%s MIDI"), 1657 /* Cakewalk Sonar V-Studio 100 */ 1658 EXTERNAL_PORT(0x0582, 0x00eb, 0, "%s MIDI"), 1659 CONTROL_PORT(0x0582, 0x00eb, 1, "%s Control"), 1660 /* Roland VB-99 */ 1661 CONTROL_PORT(0x0582, 0x0102, 0, "%s Control"), 1662 EXTERNAL_PORT(0x0582, 0x0102, 1, "%s MIDI"), 1663 /* Roland A-PRO */ 1664 EXTERNAL_PORT(0x0582, 0x010f, 0, "%s MIDI"), 1665 CONTROL_PORT(0x0582, 0x010f, 1, "%s 1"), 1666 CONTROL_PORT(0x0582, 0x010f, 2, "%s 2"), 1667 /* Roland SD-50 */ 1668 ROLAND_SYNTH_PORT(0x0582, 0x0114, 0, "%s Synth", 128), 1669 EXTERNAL_PORT(0x0582, 0x0114, 1, "%s MIDI"), 1670 CONTROL_PORT(0x0582, 0x0114, 2, "%s Control"), 1671 /* Roland OCTA-CAPTURE */ 1672 EXTERNAL_PORT(0x0582, 0x0120, 0, "%s MIDI"), 1673 CONTROL_PORT(0x0582, 0x0120, 1, "%s Control"), 1674 EXTERNAL_PORT(0x0582, 0x0121, 0, "%s MIDI"), 1675 CONTROL_PORT(0x0582, 0x0121, 1, "%s Control"), 1676 /* Roland SPD-SX */ 1677 CONTROL_PORT(0x0582, 0x0145, 0, "%s Control"), 1678 EXTERNAL_PORT(0x0582, 0x0145, 1, "%s MIDI"), 1679 /* Roland A-Series */ 1680 CONTROL_PORT(0x0582, 0x0156, 0, "%s Keyboard"), 1681 EXTERNAL_PORT(0x0582, 0x0156, 1, "%s MIDI"), 1682 /* Roland INTEGRA-7 */ 1683 ROLAND_SYNTH_PORT(0x0582, 0x015b, 0, "%s Synth", 128), 1684 CONTROL_PORT(0x0582, 0x015b, 1, "%s Control"), 1685 /* M-Audio MidiSport 8x8 */ 1686 CONTROL_PORT(0x0763, 0x1031, 8, "%s Control"), 1687 CONTROL_PORT(0x0763, 0x1033, 8, "%s Control"), 1688 /* MOTU Fastlane */ 1689 EXTERNAL_PORT(0x07fd, 0x0001, 0, "%s MIDI A"), 1690 EXTERNAL_PORT(0x07fd, 0x0001, 1, "%s MIDI B"), 1691 /* Emagic Unitor8/AMT8/MT4 */ 1692 EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"), 1693 EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"), 1694 EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"), 1695 /* Akai MPD16 */ 1696 CONTROL_PORT(0x09e8, 0x0062, 0, "%s Control"), 1697 PORT_INFO(0x09e8, 0x0062, 1, "%s MIDI", 0, 1698 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | 1699 SNDRV_SEQ_PORT_TYPE_HARDWARE), 1700 /* Access Music Virus TI */ 1701 EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"), 1702 PORT_INFO(0x133e, 0x0815, 1, "%s Synth", 0, 1703 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | 1704 SNDRV_SEQ_PORT_TYPE_HARDWARE | 1705 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER), 1706}; 1707 1708static struct port_info *find_port_info(struct snd_usb_midi *umidi, int number) 1709{ 1710 int i; 1711 1712 for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) { 1713 if (snd_usbmidi_port_info[i].id == umidi->usb_id && 1714 snd_usbmidi_port_info[i].port == number) 1715 return &snd_usbmidi_port_info[i]; 1716 } 1717 return NULL; 1718} 1719 1720static void snd_usbmidi_get_port_info(struct snd_rawmidi *rmidi, int number, 1721 struct snd_seq_port_info *seq_port_info) 1722{ 1723 struct snd_usb_midi *umidi = rmidi->private_data; 1724 struct port_info *port_info; 1725 1726 /* TODO: read port flags from descriptors */ 1727 port_info = find_port_info(umidi, number); 1728 if (port_info) { 1729 seq_port_info->type = port_info->seq_flags; 1730 seq_port_info->midi_voices = port_info->voices; 1731 } 1732} 1733 1734static void snd_usbmidi_init_substream(struct snd_usb_midi *umidi, 1735 int stream, int number, 1736 struct snd_rawmidi_substream **rsubstream) 1737{ 1738 struct port_info *port_info; 1739 const char *name_format; 1740 1741 struct snd_rawmidi_substream *substream = 1742 snd_usbmidi_find_substream(umidi, stream, number); 1743 if (!substream) { 1744 dev_err(&umidi->dev->dev, "substream %d:%d not found\n", stream, 1745 number); 1746 return; 1747 } 1748 1749 /* TODO: read port name from jack descriptor */ 1750 port_info = find_port_info(umidi, number); 1751 name_format = port_info ? port_info->name : "%s MIDI %d"; 1752 snprintf(substream->name, sizeof(substream->name), 1753 name_format, umidi->card->shortname, number + 1); 1754 1755 *rsubstream = substream; 1756} 1757 1758/* 1759 * Creates the endpoints and their ports. 1760 */ 1761static int snd_usbmidi_create_endpoints(struct snd_usb_midi *umidi, 1762 struct snd_usb_midi_endpoint_info *endpoints) 1763{ 1764 int i, j, err; 1765 int out_ports = 0, in_ports = 0; 1766 1767 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 1768 if (endpoints[i].out_cables) { 1769 err = snd_usbmidi_out_endpoint_create(umidi, 1770 &endpoints[i], 1771 &umidi->endpoints[i]); 1772 if (err < 0) 1773 return err; 1774 } 1775 if (endpoints[i].in_cables) { 1776 err = snd_usbmidi_in_endpoint_create(umidi, 1777 &endpoints[i], 1778 &umidi->endpoints[i]); 1779 if (err < 0) 1780 return err; 1781 } 1782 1783 for (j = 0; j < 0x10; ++j) { 1784 if (endpoints[i].out_cables & (1 << j)) { 1785 snd_usbmidi_init_substream(umidi, 1786 SNDRV_RAWMIDI_STREAM_OUTPUT, 1787 out_ports, 1788 &umidi->endpoints[i].out->ports[j].substream); 1789 ++out_ports; 1790 } 1791 if (endpoints[i].in_cables & (1 << j)) { 1792 snd_usbmidi_init_substream(umidi, 1793 SNDRV_RAWMIDI_STREAM_INPUT, 1794 in_ports, 1795 &umidi->endpoints[i].in->ports[j].substream); 1796 ++in_ports; 1797 } 1798 } 1799 } 1800 dev_dbg(&umidi->dev->dev, "created %d output and %d input ports\n", 1801 out_ports, in_ports); 1802 return 0; 1803} 1804 1805/* 1806 * Returns MIDIStreaming device capabilities. 1807 */ 1808static int snd_usbmidi_get_ms_info(struct snd_usb_midi *umidi, 1809 struct snd_usb_midi_endpoint_info *endpoints) 1810{ 1811 struct usb_interface *intf; 1812 struct usb_host_interface *hostif; 1813 struct usb_interface_descriptor *intfd; 1814 struct usb_ms_header_descriptor *ms_header; 1815 struct usb_host_endpoint *hostep; 1816 struct usb_endpoint_descriptor *ep; 1817 struct usb_ms_endpoint_descriptor *ms_ep; 1818 int i, epidx; 1819 1820 intf = umidi->iface; 1821 if (!intf) 1822 return -ENXIO; 1823 hostif = &intf->altsetting[0]; 1824 intfd = get_iface_desc(hostif); 1825 ms_header = (struct usb_ms_header_descriptor *)hostif->extra; 1826 if (hostif->extralen >= 7 && 1827 ms_header->bLength >= 7 && 1828 ms_header->bDescriptorType == USB_DT_CS_INTERFACE && 1829 ms_header->bDescriptorSubtype == UAC_HEADER) 1830 dev_dbg(&umidi->dev->dev, "MIDIStreaming version %02x.%02x\n", 1831 ms_header->bcdMSC[1], ms_header->bcdMSC[0]); 1832 else 1833 dev_warn(&umidi->dev->dev, 1834 "MIDIStreaming interface descriptor not found\n"); 1835 1836 epidx = 0; 1837 for (i = 0; i < intfd->bNumEndpoints; ++i) { 1838 hostep = &hostif->endpoint[i]; 1839 ep = get_ep_desc(hostep); 1840 if (!usb_endpoint_xfer_bulk(ep) && !usb_endpoint_xfer_int(ep)) 1841 continue; 1842 ms_ep = (struct usb_ms_endpoint_descriptor *)hostep->extra; 1843 if (hostep->extralen < 4 || 1844 ms_ep->bLength < 4 || 1845 ms_ep->bDescriptorType != USB_DT_CS_ENDPOINT || 1846 ms_ep->bDescriptorSubtype != UAC_MS_GENERAL) 1847 continue; 1848 if (usb_endpoint_dir_out(ep)) { 1849 if (endpoints[epidx].out_ep) { 1850 if (++epidx >= MIDI_MAX_ENDPOINTS) { 1851 dev_warn(&umidi->dev->dev, 1852 "too many endpoints\n"); 1853 break; 1854 } 1855 } 1856 endpoints[epidx].out_ep = usb_endpoint_num(ep); 1857 if (usb_endpoint_xfer_int(ep)) 1858 endpoints[epidx].out_interval = ep->bInterval; 1859 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW) 1860 /* 1861 * Low speed bulk transfers don't exist, so 1862 * force interrupt transfers for devices like 1863 * ESI MIDI Mate that try to use them anyway. 1864 */ 1865 endpoints[epidx].out_interval = 1; 1866 endpoints[epidx].out_cables = 1867 (1 << ms_ep->bNumEmbMIDIJack) - 1; 1868 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n", 1869 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack); 1870 } else { 1871 if (endpoints[epidx].in_ep) { 1872 if (++epidx >= MIDI_MAX_ENDPOINTS) { 1873 dev_warn(&umidi->dev->dev, 1874 "too many endpoints\n"); 1875 break; 1876 } 1877 } 1878 endpoints[epidx].in_ep = usb_endpoint_num(ep); 1879 if (usb_endpoint_xfer_int(ep)) 1880 endpoints[epidx].in_interval = ep->bInterval; 1881 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW) 1882 endpoints[epidx].in_interval = 1; 1883 endpoints[epidx].in_cables = 1884 (1 << ms_ep->bNumEmbMIDIJack) - 1; 1885 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n", 1886 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack); 1887 } 1888 } 1889 return 0; 1890} 1891 1892static int roland_load_info(struct snd_kcontrol *kcontrol, 1893 struct snd_ctl_elem_info *info) 1894{ 1895 static const char *const names[] = { "High Load", "Light Load" }; 1896 1897 return snd_ctl_enum_info(info, 1, 2, names); 1898} 1899 1900static int roland_load_get(struct snd_kcontrol *kcontrol, 1901 struct snd_ctl_elem_value *value) 1902{ 1903 value->value.enumerated.item[0] = kcontrol->private_value; 1904 return 0; 1905} 1906 1907static int roland_load_put(struct snd_kcontrol *kcontrol, 1908 struct snd_ctl_elem_value *value) 1909{ 1910 struct snd_usb_midi *umidi = kcontrol->private_data; 1911 int changed; 1912 1913 if (value->value.enumerated.item[0] > 1) 1914 return -EINVAL; 1915 mutex_lock(&umidi->mutex); 1916 changed = value->value.enumerated.item[0] != kcontrol->private_value; 1917 if (changed) 1918 kcontrol->private_value = value->value.enumerated.item[0]; 1919 mutex_unlock(&umidi->mutex); 1920 return changed; 1921} 1922 1923static struct snd_kcontrol_new roland_load_ctl = { 1924 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1925 .name = "MIDI Input Mode", 1926 .info = roland_load_info, 1927 .get = roland_load_get, 1928 .put = roland_load_put, 1929 .private_value = 1, 1930}; 1931 1932/* 1933 * On Roland devices, use the second alternate setting to be able to use 1934 * the interrupt input endpoint. 1935 */ 1936static void snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi *umidi) 1937{ 1938 struct usb_interface *intf; 1939 struct usb_host_interface *hostif; 1940 struct usb_interface_descriptor *intfd; 1941 1942 intf = umidi->iface; 1943 if (!intf || intf->num_altsetting != 2) 1944 return; 1945 1946 hostif = &intf->altsetting[1]; 1947 intfd = get_iface_desc(hostif); 1948 if (intfd->bNumEndpoints != 2 || 1949 (get_endpoint(hostif, 0)->bmAttributes & 1950 USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK || 1951 (get_endpoint(hostif, 1)->bmAttributes & 1952 USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT) 1953 return; 1954 1955 dev_dbg(&umidi->dev->dev, "switching to altsetting %d with int ep\n", 1956 intfd->bAlternateSetting); 1957 usb_set_interface(umidi->dev, intfd->bInterfaceNumber, 1958 intfd->bAlternateSetting); 1959 1960 umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi); 1961 if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0) 1962 umidi->roland_load_ctl = NULL; 1963} 1964 1965/* 1966 * Try to find any usable endpoints in the interface. 1967 */ 1968static int snd_usbmidi_detect_endpoints(struct snd_usb_midi *umidi, 1969 struct snd_usb_midi_endpoint_info *endpoint, 1970 int max_endpoints) 1971{ 1972 struct usb_interface *intf; 1973 struct usb_host_interface *hostif; 1974 struct usb_interface_descriptor *intfd; 1975 struct usb_endpoint_descriptor *epd; 1976 int i, out_eps = 0, in_eps = 0; 1977 1978 if (USB_ID_VENDOR(umidi->usb_id) == 0x0582) 1979 snd_usbmidi_switch_roland_altsetting(umidi); 1980 1981 if (endpoint[0].out_ep || endpoint[0].in_ep) 1982 return 0; 1983 1984 intf = umidi->iface; 1985 if (!intf || intf->num_altsetting < 1) 1986 return -ENOENT; 1987 hostif = intf->cur_altsetting; 1988 intfd = get_iface_desc(hostif); 1989 1990 for (i = 0; i < intfd->bNumEndpoints; ++i) { 1991 epd = get_endpoint(hostif, i); 1992 if (!usb_endpoint_xfer_bulk(epd) && 1993 !usb_endpoint_xfer_int(epd)) 1994 continue; 1995 if (out_eps < max_endpoints && 1996 usb_endpoint_dir_out(epd)) { 1997 endpoint[out_eps].out_ep = usb_endpoint_num(epd); 1998 if (usb_endpoint_xfer_int(epd)) 1999 endpoint[out_eps].out_interval = epd->bInterval; 2000 ++out_eps; 2001 } 2002 if (in_eps < max_endpoints && 2003 usb_endpoint_dir_in(epd)) { 2004 endpoint[in_eps].in_ep = usb_endpoint_num(epd); 2005 if (usb_endpoint_xfer_int(epd)) 2006 endpoint[in_eps].in_interval = epd->bInterval; 2007 ++in_eps; 2008 } 2009 } 2010 return (out_eps || in_eps) ? 0 : -ENOENT; 2011} 2012 2013/* 2014 * Detects the endpoints for one-port-per-endpoint protocols. 2015 */ 2016static int snd_usbmidi_detect_per_port_endpoints(struct snd_usb_midi *umidi, 2017 struct snd_usb_midi_endpoint_info *endpoints) 2018{ 2019 int err, i; 2020 2021 err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS); 2022 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 2023 if (endpoints[i].out_ep) 2024 endpoints[i].out_cables = 0x0001; 2025 if (endpoints[i].in_ep) 2026 endpoints[i].in_cables = 0x0001; 2027 } 2028 return err; 2029} 2030 2031/* 2032 * Detects the endpoints and ports of Yamaha devices. 2033 */ 2034static int snd_usbmidi_detect_yamaha(struct snd_usb_midi *umidi, 2035 struct snd_usb_midi_endpoint_info *endpoint) 2036{ 2037 struct usb_interface *intf; 2038 struct usb_host_interface *hostif; 2039 struct usb_interface_descriptor *intfd; 2040 uint8_t *cs_desc; 2041 2042 intf = umidi->iface; 2043 if (!intf) 2044 return -ENOENT; 2045 hostif = intf->altsetting; 2046 intfd = get_iface_desc(hostif); 2047 if (intfd->bNumEndpoints < 1) 2048 return -ENOENT; 2049 2050 /* 2051 * For each port there is one MIDI_IN/OUT_JACK descriptor, not 2052 * necessarily with any useful contents. So simply count 'em. 2053 */ 2054 for (cs_desc = hostif->extra; 2055 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2; 2056 cs_desc += cs_desc[0]) { 2057 if (cs_desc[1] == USB_DT_CS_INTERFACE) { 2058 if (cs_desc[2] == UAC_MIDI_IN_JACK) 2059 endpoint->in_cables = 2060 (endpoint->in_cables << 1) | 1; 2061 else if (cs_desc[2] == UAC_MIDI_OUT_JACK) 2062 endpoint->out_cables = 2063 (endpoint->out_cables << 1) | 1; 2064 } 2065 } 2066 if (!endpoint->in_cables && !endpoint->out_cables) 2067 return -ENOENT; 2068 2069 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1); 2070} 2071 2072/* 2073 * Detects the endpoints and ports of Roland devices. 2074 */ 2075static int snd_usbmidi_detect_roland(struct snd_usb_midi *umidi, 2076 struct snd_usb_midi_endpoint_info *endpoint) 2077{ 2078 struct usb_interface *intf; 2079 struct usb_host_interface *hostif; 2080 u8 *cs_desc; 2081 2082 intf = umidi->iface; 2083 if (!intf) 2084 return -ENOENT; 2085 hostif = intf->altsetting; 2086 /* 2087 * Some devices have a descriptor <06 24 F1 02 <inputs> <outputs>>, 2088 * some have standard class descriptors, or both kinds, or neither. 2089 */ 2090 for (cs_desc = hostif->extra; 2091 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2; 2092 cs_desc += cs_desc[0]) { 2093 if (cs_desc[0] >= 6 && 2094 cs_desc[1] == USB_DT_CS_INTERFACE && 2095 cs_desc[2] == 0xf1 && 2096 cs_desc[3] == 0x02) { 2097 endpoint->in_cables = (1 << cs_desc[4]) - 1; 2098 endpoint->out_cables = (1 << cs_desc[5]) - 1; 2099 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1); 2100 } else if (cs_desc[0] >= 7 && 2101 cs_desc[1] == USB_DT_CS_INTERFACE && 2102 cs_desc[2] == UAC_HEADER) { 2103 return snd_usbmidi_get_ms_info(umidi, endpoint); 2104 } 2105 } 2106 2107 return -ENODEV; 2108} 2109 2110/* 2111 * Creates the endpoints and their ports for Midiman devices. 2112 */ 2113static int snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi *umidi, 2114 struct snd_usb_midi_endpoint_info *endpoint) 2115{ 2116 struct snd_usb_midi_endpoint_info ep_info; 2117 struct usb_interface *intf; 2118 struct usb_host_interface *hostif; 2119 struct usb_interface_descriptor *intfd; 2120 struct usb_endpoint_descriptor *epd; 2121 int cable, err; 2122 2123 intf = umidi->iface; 2124 if (!intf) 2125 return -ENOENT; 2126 hostif = intf->altsetting; 2127 intfd = get_iface_desc(hostif); 2128 /* 2129 * The various MidiSport devices have more or less random endpoint 2130 * numbers, so we have to identify the endpoints by their index in 2131 * the descriptor array, like the driver for that other OS does. 2132 * 2133 * There is one interrupt input endpoint for all input ports, one 2134 * bulk output endpoint for even-numbered ports, and one for odd- 2135 * numbered ports. Both bulk output endpoints have corresponding 2136 * input bulk endpoints (at indices 1 and 3) which aren't used. 2137 */ 2138 if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) { 2139 dev_dbg(&umidi->dev->dev, "not enough endpoints\n"); 2140 return -ENOENT; 2141 } 2142 2143 epd = get_endpoint(hostif, 0); 2144 if (!usb_endpoint_dir_in(epd) || !usb_endpoint_xfer_int(epd)) { 2145 dev_dbg(&umidi->dev->dev, "endpoint[0] isn't interrupt\n"); 2146 return -ENXIO; 2147 } 2148 epd = get_endpoint(hostif, 2); 2149 if (!usb_endpoint_dir_out(epd) || !usb_endpoint_xfer_bulk(epd)) { 2150 dev_dbg(&umidi->dev->dev, "endpoint[2] isn't bulk output\n"); 2151 return -ENXIO; 2152 } 2153 if (endpoint->out_cables > 0x0001) { 2154 epd = get_endpoint(hostif, 4); 2155 if (!usb_endpoint_dir_out(epd) || 2156 !usb_endpoint_xfer_bulk(epd)) { 2157 dev_dbg(&umidi->dev->dev, 2158 "endpoint[4] isn't bulk output\n"); 2159 return -ENXIO; 2160 } 2161 } 2162 2163 ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress & 2164 USB_ENDPOINT_NUMBER_MASK; 2165 ep_info.out_interval = 0; 2166 ep_info.out_cables = endpoint->out_cables & 0x5555; 2167 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, 2168 &umidi->endpoints[0]); 2169 if (err < 0) 2170 return err; 2171 2172 ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress & 2173 USB_ENDPOINT_NUMBER_MASK; 2174 ep_info.in_interval = get_endpoint(hostif, 0)->bInterval; 2175 ep_info.in_cables = endpoint->in_cables; 2176 err = snd_usbmidi_in_endpoint_create(umidi, &ep_info, 2177 &umidi->endpoints[0]); 2178 if (err < 0) 2179 return err; 2180 2181 if (endpoint->out_cables > 0x0001) { 2182 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress & 2183 USB_ENDPOINT_NUMBER_MASK; 2184 ep_info.out_cables = endpoint->out_cables & 0xaaaa; 2185 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, 2186 &umidi->endpoints[1]); 2187 if (err < 0) 2188 return err; 2189 } 2190 2191 for (cable = 0; cable < 0x10; ++cable) { 2192 if (endpoint->out_cables & (1 << cable)) 2193 snd_usbmidi_init_substream(umidi, 2194 SNDRV_RAWMIDI_STREAM_OUTPUT, 2195 cable, 2196 &umidi->endpoints[cable & 1].out->ports[cable].substream); 2197 if (endpoint->in_cables & (1 << cable)) 2198 snd_usbmidi_init_substream(umidi, 2199 SNDRV_RAWMIDI_STREAM_INPUT, 2200 cable, 2201 &umidi->endpoints[0].in->ports[cable].substream); 2202 } 2203 return 0; 2204} 2205 2206static struct snd_rawmidi_global_ops snd_usbmidi_ops = { 2207 .get_port_info = snd_usbmidi_get_port_info, 2208}; 2209 2210static int snd_usbmidi_create_rawmidi(struct snd_usb_midi *umidi, 2211 int out_ports, int in_ports) 2212{ 2213 struct snd_rawmidi *rmidi; 2214 int err; 2215 2216 err = snd_rawmidi_new(umidi->card, "USB MIDI", 2217 umidi->next_midi_device++, 2218 out_ports, in_ports, &rmidi); 2219 if (err < 0) 2220 return err; 2221 strcpy(rmidi->name, umidi->card->shortname); 2222 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | 2223 SNDRV_RAWMIDI_INFO_INPUT | 2224 SNDRV_RAWMIDI_INFO_DUPLEX; 2225 rmidi->ops = &snd_usbmidi_ops; 2226 rmidi->private_data = umidi; 2227 rmidi->private_free = snd_usbmidi_rawmidi_free; 2228 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 2229 &snd_usbmidi_output_ops); 2230 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 2231 &snd_usbmidi_input_ops); 2232 2233 umidi->rmidi = rmidi; 2234 return 0; 2235} 2236 2237/* 2238 * Temporarily stop input. 2239 */ 2240void snd_usbmidi_input_stop(struct list_head *p) 2241{ 2242 struct snd_usb_midi *umidi; 2243 unsigned int i, j; 2244 2245 umidi = list_entry(p, struct snd_usb_midi, list); 2246 if (!umidi->input_running) 2247 return; 2248 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 2249 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i]; 2250 if (ep->in) 2251 for (j = 0; j < INPUT_URBS; ++j) 2252 usb_kill_urb(ep->in->urbs[j]); 2253 } 2254 umidi->input_running = 0; 2255} 2256EXPORT_SYMBOL(snd_usbmidi_input_stop); 2257 2258static void snd_usbmidi_input_start_ep(struct snd_usb_midi_in_endpoint *ep) 2259{ 2260 unsigned int i; 2261 2262 if (!ep) 2263 return; 2264 for (i = 0; i < INPUT_URBS; ++i) { 2265 struct urb *urb = ep->urbs[i]; 2266 urb->dev = ep->umidi->dev; 2267 snd_usbmidi_submit_urb(urb, GFP_KERNEL); 2268 } 2269} 2270 2271/* 2272 * Resume input after a call to snd_usbmidi_input_stop(). 2273 */ 2274void snd_usbmidi_input_start(struct list_head *p) 2275{ 2276 struct snd_usb_midi *umidi; 2277 int i; 2278 2279 umidi = list_entry(p, struct snd_usb_midi, list); 2280 if (umidi->input_running || !umidi->opened[1]) 2281 return; 2282 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) 2283 snd_usbmidi_input_start_ep(umidi->endpoints[i].in); 2284 umidi->input_running = 1; 2285} 2286EXPORT_SYMBOL(snd_usbmidi_input_start); 2287 2288/* 2289 * Prepare for suspend. Typically called from the USB suspend callback. 2290 */ 2291void snd_usbmidi_suspend(struct list_head *p) 2292{ 2293 struct snd_usb_midi *umidi; 2294 2295 umidi = list_entry(p, struct snd_usb_midi, list); 2296 mutex_lock(&umidi->mutex); 2297 snd_usbmidi_input_stop(p); 2298 mutex_unlock(&umidi->mutex); 2299} 2300EXPORT_SYMBOL(snd_usbmidi_suspend); 2301 2302/* 2303 * Resume. Typically called from the USB resume callback. 2304 */ 2305void snd_usbmidi_resume(struct list_head *p) 2306{ 2307 struct snd_usb_midi *umidi; 2308 2309 umidi = list_entry(p, struct snd_usb_midi, list); 2310 mutex_lock(&umidi->mutex); 2311 snd_usbmidi_input_start(p); 2312 mutex_unlock(&umidi->mutex); 2313} 2314EXPORT_SYMBOL(snd_usbmidi_resume); 2315 2316/* 2317 * Creates and registers everything needed for a MIDI streaming interface. 2318 */ 2319int snd_usbmidi_create(struct snd_card *card, 2320 struct usb_interface *iface, 2321 struct list_head *midi_list, 2322 const struct snd_usb_audio_quirk *quirk) 2323{ 2324 struct snd_usb_midi *umidi; 2325 struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS]; 2326 int out_ports, in_ports; 2327 int i, err; 2328 2329 umidi = kzalloc(sizeof(*umidi), GFP_KERNEL); 2330 if (!umidi) 2331 return -ENOMEM; 2332 umidi->dev = interface_to_usbdev(iface); 2333 umidi->card = card; 2334 umidi->iface = iface; 2335 umidi->quirk = quirk; 2336 umidi->usb_protocol_ops = &snd_usbmidi_standard_ops; 2337 spin_lock_init(&umidi->disc_lock); 2338 init_rwsem(&umidi->disc_rwsem); 2339 mutex_init(&umidi->mutex); 2340 umidi->usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor), 2341 le16_to_cpu(umidi->dev->descriptor.idProduct)); 2342 setup_timer(&umidi->error_timer, snd_usbmidi_error_timer, 2343 (unsigned long)umidi); 2344 2345 /* detect the endpoint(s) to use */ 2346 memset(endpoints, 0, sizeof(endpoints)); 2347 switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) { 2348 case QUIRK_MIDI_STANDARD_INTERFACE: 2349 err = snd_usbmidi_get_ms_info(umidi, endpoints); 2350 if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */ 2351 umidi->usb_protocol_ops = 2352 &snd_usbmidi_maudio_broken_running_status_ops; 2353 break; 2354 case QUIRK_MIDI_US122L: 2355 umidi->usb_protocol_ops = &snd_usbmidi_122l_ops; 2356 /* fall through */ 2357 case QUIRK_MIDI_FIXED_ENDPOINT: 2358 memcpy(&endpoints[0], quirk->data, 2359 sizeof(struct snd_usb_midi_endpoint_info)); 2360 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1); 2361 break; 2362 case QUIRK_MIDI_YAMAHA: 2363 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]); 2364 break; 2365 case QUIRK_MIDI_ROLAND: 2366 err = snd_usbmidi_detect_roland(umidi, &endpoints[0]); 2367 break; 2368 case QUIRK_MIDI_MIDIMAN: 2369 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops; 2370 memcpy(&endpoints[0], quirk->data, 2371 sizeof(struct snd_usb_midi_endpoint_info)); 2372 err = 0; 2373 break; 2374 case QUIRK_MIDI_NOVATION: 2375 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops; 2376 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2377 break; 2378 case QUIRK_MIDI_RAW_BYTES: 2379 umidi->usb_protocol_ops = &snd_usbmidi_raw_ops; 2380 /* 2381 * Interface 1 contains isochronous endpoints, but with the same 2382 * numbers as in interface 0. Since it is interface 1 that the 2383 * USB core has most recently seen, these descriptors are now 2384 * associated with the endpoint numbers. This will foul up our 2385 * attempts to submit bulk/interrupt URBs to the endpoints in 2386 * interface 0, so we have to make sure that the USB core looks 2387 * again at interface 0 by calling usb_set_interface() on it. 2388 */ 2389 if (umidi->usb_id == USB_ID(0x07fd, 0x0001)) /* MOTU Fastlane */ 2390 usb_set_interface(umidi->dev, 0, 0); 2391 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2392 break; 2393 case QUIRK_MIDI_EMAGIC: 2394 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops; 2395 memcpy(&endpoints[0], quirk->data, 2396 sizeof(struct snd_usb_midi_endpoint_info)); 2397 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1); 2398 break; 2399 case QUIRK_MIDI_CME: 2400 umidi->usb_protocol_ops = &snd_usbmidi_cme_ops; 2401 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2402 break; 2403 case QUIRK_MIDI_AKAI: 2404 umidi->usb_protocol_ops = &snd_usbmidi_akai_ops; 2405 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2406 /* endpoint 1 is input-only */ 2407 endpoints[1].out_cables = 0; 2408 break; 2409 case QUIRK_MIDI_FTDI: 2410 umidi->usb_protocol_ops = &snd_usbmidi_ftdi_ops; 2411 2412 /* set baud rate to 31250 (48 MHz / 16 / 96) */ 2413 err = usb_control_msg(umidi->dev, usb_sndctrlpipe(umidi->dev, 0), 2414 3, 0x40, 0x60, 0, NULL, 0, 1000); 2415 if (err < 0) 2416 break; 2417 2418 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2419 break; 2420 case QUIRK_MIDI_CH345: 2421 umidi->usb_protocol_ops = &snd_usbmidi_ch345_broken_sysex_ops; 2422 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2423 break; 2424 default: 2425 dev_err(&umidi->dev->dev, "invalid quirk type %d\n", 2426 quirk->type); 2427 err = -ENXIO; 2428 break; 2429 } 2430 if (err < 0) { 2431 kfree(umidi); 2432 return err; 2433 } 2434 2435 /* create rawmidi device */ 2436 out_ports = 0; 2437 in_ports = 0; 2438 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 2439 out_ports += hweight16(endpoints[i].out_cables); 2440 in_ports += hweight16(endpoints[i].in_cables); 2441 } 2442 err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports); 2443 if (err < 0) { 2444 kfree(umidi); 2445 return err; 2446 } 2447 2448 /* create endpoint/port structures */ 2449 if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN) 2450 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]); 2451 else 2452 err = snd_usbmidi_create_endpoints(umidi, endpoints); 2453 if (err < 0) { 2454 return err; 2455 } 2456 2457 usb_autopm_get_interface_no_resume(umidi->iface); 2458 2459 list_add_tail(&umidi->list, midi_list); 2460 return 0; 2461} 2462EXPORT_SYMBOL(snd_usbmidi_create); 2463