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/usb/midi.h> 51#include <linux/module.h> 52 53#include <sound/core.h> 54#include <sound/control.h> 55#include <sound/rawmidi.h> 56#include <sound/asequencer.h> 57#include "usbaudio.h" 58#include "midi.h" 59#include "power.h" 60#include "helper.h" 61 62/* 63 * define this to log all USB packets 64 */ 65/* #define DUMP_PACKETS */ 66 67/* 68 * how long to wait after some USB errors, so that hub_wq can disconnect() us 69 * without too many spurious errors 70 */ 71#define ERROR_DELAY_JIFFIES (HZ / 10) 72 73#define OUTPUT_URBS 7 74#define INPUT_URBS 7 75 76 77MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>"); 78MODULE_DESCRIPTION("USB Audio/MIDI helper module"); 79MODULE_LICENSE("Dual BSD/GPL"); 80 81struct snd_usb_midi_in_endpoint; 82struct snd_usb_midi_out_endpoint; 83struct snd_usb_midi_endpoint; 84 85struct usb_protocol_ops { 86 void (*input)(struct snd_usb_midi_in_endpoint*, uint8_t*, int); 87 void (*output)(struct snd_usb_midi_out_endpoint *ep, struct urb *urb); 88 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t); 89 void (*init_out_endpoint)(struct snd_usb_midi_out_endpoint *); 90 void (*finish_out_endpoint)(struct snd_usb_midi_out_endpoint *); 91}; 92 93struct snd_usb_midi { 94 struct usb_device *dev; 95 struct snd_card *card; 96 struct usb_interface *iface; 97 const struct snd_usb_audio_quirk *quirk; 98 struct snd_rawmidi *rmidi; 99 const struct usb_protocol_ops *usb_protocol_ops; 100 struct list_head list; 101 struct timer_list error_timer; 102 spinlock_t disc_lock; 103 struct rw_semaphore disc_rwsem; 104 struct mutex mutex; 105 u32 usb_id; 106 int next_midi_device; 107 108 struct snd_usb_midi_endpoint { 109 struct snd_usb_midi_out_endpoint *out; 110 struct snd_usb_midi_in_endpoint *in; 111 } endpoints[MIDI_MAX_ENDPOINTS]; 112 unsigned long input_triggered; 113 unsigned int opened[2]; 114 unsigned char disconnected; 115 unsigned char input_running; 116 117 struct snd_kcontrol *roland_load_ctl; 118}; 119 120struct snd_usb_midi_out_endpoint { 121 struct snd_usb_midi *umidi; 122 struct out_urb_context { 123 struct urb *urb; 124 struct snd_usb_midi_out_endpoint *ep; 125 } urbs[OUTPUT_URBS]; 126 unsigned int active_urbs; 127 unsigned int drain_urbs; 128 int max_transfer; /* size of urb buffer */ 129 struct work_struct work; 130 unsigned int next_urb; 131 spinlock_t buffer_lock; 132 133 struct usbmidi_out_port { 134 struct snd_usb_midi_out_endpoint *ep; 135 struct snd_rawmidi_substream *substream; 136 int active; 137 uint8_t cable; /* cable number << 4 */ 138 uint8_t state; 139#define STATE_UNKNOWN 0 140#define STATE_1PARAM 1 141#define STATE_2PARAM_1 2 142#define STATE_2PARAM_2 3 143#define STATE_SYSEX_0 4 144#define STATE_SYSEX_1 5 145#define STATE_SYSEX_2 6 146 uint8_t data[2]; 147 } ports[0x10]; 148 int current_port; 149 150 wait_queue_head_t drain_wait; 151}; 152 153struct snd_usb_midi_in_endpoint { 154 struct snd_usb_midi *umidi; 155 struct urb *urbs[INPUT_URBS]; 156 struct usbmidi_in_port { 157 struct snd_rawmidi_substream *substream; 158 u8 running_status_length; 159 } ports[0x10]; 160 u8 seen_f5; 161 bool in_sysex; 162 u8 last_cin; 163 u8 error_resubmit; 164 int current_port; 165}; 166 167static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep); 168 169static const uint8_t snd_usbmidi_cin_length[] = { 170 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1 171}; 172 173/* 174 * Submits the URB, with error handling. 175 */ 176static int snd_usbmidi_submit_urb(struct urb *urb, gfp_t flags) 177{ 178 int err = usb_submit_urb(urb, flags); 179 if (err < 0 && err != -ENODEV) 180 dev_err(&urb->dev->dev, "usb_submit_urb: %d\n", err); 181 return err; 182} 183 184/* 185 * Error handling for URB completion functions. 186 */ 187static int snd_usbmidi_urb_error(const struct urb *urb) 188{ 189 switch (urb->status) { 190 /* manually unlinked, or device gone */ 191 case -ENOENT: 192 case -ECONNRESET: 193 case -ESHUTDOWN: 194 case -ENODEV: 195 return -ENODEV; 196 /* errors that might occur during unplugging */ 197 case -EPROTO: 198 case -ETIME: 199 case -EILSEQ: 200 return -EIO; 201 default: 202 dev_err(&urb->dev->dev, "urb status %d\n", urb->status); 203 return 0; /* continue */ 204 } 205} 206 207/* 208 * Receives a chunk of MIDI data. 209 */ 210static void snd_usbmidi_input_data(struct snd_usb_midi_in_endpoint *ep, 211 int portidx, uint8_t *data, int length) 212{ 213 struct usbmidi_in_port *port = &ep->ports[portidx]; 214 215 if (!port->substream) { 216 dev_dbg(&ep->umidi->dev->dev, "unexpected port %d!\n", portidx); 217 return; 218 } 219 if (!test_bit(port->substream->number, &ep->umidi->input_triggered)) 220 return; 221 snd_rawmidi_receive(port->substream, data, length); 222} 223 224#ifdef DUMP_PACKETS 225static void dump_urb(const char *type, const u8 *data, int length) 226{ 227 snd_printk(KERN_DEBUG "%s packet: [", type); 228 for (; length > 0; ++data, --length) 229 printk(KERN_CONT " %02x", *data); 230 printk(KERN_CONT " ]\n"); 231} 232#else 233#define dump_urb(type, data, length) /* nothing */ 234#endif 235 236/* 237 * Processes the data read from the device. 238 */ 239static void snd_usbmidi_in_urb_complete(struct urb *urb) 240{ 241 struct snd_usb_midi_in_endpoint *ep = urb->context; 242 243 if (urb->status == 0) { 244 dump_urb("received", urb->transfer_buffer, urb->actual_length); 245 ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer, 246 urb->actual_length); 247 } else { 248 int err = snd_usbmidi_urb_error(urb); 249 if (err < 0) { 250 if (err != -ENODEV) { 251 ep->error_resubmit = 1; 252 mod_timer(&ep->umidi->error_timer, 253 jiffies + ERROR_DELAY_JIFFIES); 254 } 255 return; 256 } 257 } 258 259 urb->dev = ep->umidi->dev; 260 snd_usbmidi_submit_urb(urb, GFP_ATOMIC); 261} 262 263static void snd_usbmidi_out_urb_complete(struct urb *urb) 264{ 265 struct out_urb_context *context = urb->context; 266 struct snd_usb_midi_out_endpoint *ep = context->ep; 267 unsigned int urb_index; 268 unsigned long flags; 269 270 spin_lock_irqsave(&ep->buffer_lock, flags); 271 urb_index = context - ep->urbs; 272 ep->active_urbs &= ~(1 << urb_index); 273 if (unlikely(ep->drain_urbs)) { 274 ep->drain_urbs &= ~(1 << urb_index); 275 wake_up(&ep->drain_wait); 276 } 277 spin_unlock_irqrestore(&ep->buffer_lock, flags); 278 if (urb->status < 0) { 279 int err = snd_usbmidi_urb_error(urb); 280 if (err < 0) { 281 if (err != -ENODEV) 282 mod_timer(&ep->umidi->error_timer, 283 jiffies + ERROR_DELAY_JIFFIES); 284 return; 285 } 286 } 287 snd_usbmidi_do_output(ep); 288} 289 290/* 291 * This is called when some data should be transferred to the device 292 * (from one or more substreams). 293 */ 294static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep) 295{ 296 unsigned int urb_index; 297 struct urb *urb; 298 unsigned long flags; 299 300 spin_lock_irqsave(&ep->buffer_lock, flags); 301 if (ep->umidi->disconnected) { 302 spin_unlock_irqrestore(&ep->buffer_lock, flags); 303 return; 304 } 305 306 urb_index = ep->next_urb; 307 for (;;) { 308 if (!(ep->active_urbs & (1 << urb_index))) { 309 urb = ep->urbs[urb_index].urb; 310 urb->transfer_buffer_length = 0; 311 ep->umidi->usb_protocol_ops->output(ep, urb); 312 if (urb->transfer_buffer_length == 0) 313 break; 314 315 dump_urb("sending", urb->transfer_buffer, 316 urb->transfer_buffer_length); 317 urb->dev = ep->umidi->dev; 318 if (snd_usbmidi_submit_urb(urb, GFP_ATOMIC) < 0) 319 break; 320 ep->active_urbs |= 1 << urb_index; 321 } 322 if (++urb_index >= OUTPUT_URBS) 323 urb_index = 0; 324 if (urb_index == ep->next_urb) 325 break; 326 } 327 ep->next_urb = urb_index; 328 spin_unlock_irqrestore(&ep->buffer_lock, flags); 329} 330 331static void snd_usbmidi_out_work(struct work_struct *work) 332{ 333 struct snd_usb_midi_out_endpoint *ep = 334 container_of(work, struct snd_usb_midi_out_endpoint, work); 335 336 snd_usbmidi_do_output(ep); 337} 338 339/* called after transfers had been interrupted due to some USB error */ 340static void snd_usbmidi_error_timer(struct timer_list *t) 341{ 342 struct snd_usb_midi *umidi = from_timer(umidi, t, error_timer); 343 unsigned int i, j; 344 345 spin_lock(&umidi->disc_lock); 346 if (umidi->disconnected) { 347 spin_unlock(&umidi->disc_lock); 348 return; 349 } 350 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 351 struct snd_usb_midi_in_endpoint *in = umidi->endpoints[i].in; 352 if (in && in->error_resubmit) { 353 in->error_resubmit = 0; 354 for (j = 0; j < INPUT_URBS; ++j) { 355 if (atomic_read(&in->urbs[j]->use_count)) 356 continue; 357 in->urbs[j]->dev = umidi->dev; 358 snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC); 359 } 360 } 361 if (umidi->endpoints[i].out) 362 snd_usbmidi_do_output(umidi->endpoints[i].out); 363 } 364 spin_unlock(&umidi->disc_lock); 365} 366 367/* helper function to send static data that may not DMA-able */ 368static int send_bulk_static_data(struct snd_usb_midi_out_endpoint *ep, 369 const void *data, int len) 370{ 371 int err = 0; 372 void *buf = kmemdup(data, len, GFP_KERNEL); 373 if (!buf) 374 return -ENOMEM; 375 dump_urb("sending", buf, len); 376 if (ep->urbs[0].urb) 377 err = usb_bulk_msg(ep->umidi->dev, ep->urbs[0].urb->pipe, 378 buf, len, NULL, 250); 379 kfree(buf); 380 return err; 381} 382 383/* 384 * Standard USB MIDI protocol: see the spec. 385 * Midiman protocol: like the standard protocol, but the control byte is the 386 * fourth byte in each packet, and uses length instead of CIN. 387 */ 388 389static void snd_usbmidi_standard_input(struct snd_usb_midi_in_endpoint *ep, 390 uint8_t *buffer, int buffer_length) 391{ 392 int i; 393 394 for (i = 0; i + 3 < buffer_length; i += 4) 395 if (buffer[i] != 0) { 396 int cable = buffer[i] >> 4; 397 int length = snd_usbmidi_cin_length[buffer[i] & 0x0f]; 398 snd_usbmidi_input_data(ep, cable, &buffer[i + 1], 399 length); 400 } 401} 402 403static void snd_usbmidi_midiman_input(struct snd_usb_midi_in_endpoint *ep, 404 uint8_t *buffer, int buffer_length) 405{ 406 int i; 407 408 for (i = 0; i + 3 < buffer_length; i += 4) 409 if (buffer[i + 3] != 0) { 410 int port = buffer[i + 3] >> 4; 411 int length = buffer[i + 3] & 3; 412 snd_usbmidi_input_data(ep, port, &buffer[i], length); 413 } 414} 415 416/* 417 * Buggy M-Audio device: running status on input results in a packet that has 418 * the data bytes but not the status byte and that is marked with CIN 4. 419 */ 420static void snd_usbmidi_maudio_broken_running_status_input( 421 struct snd_usb_midi_in_endpoint *ep, 422 uint8_t *buffer, int buffer_length) 423{ 424 int i; 425 426 for (i = 0; i + 3 < buffer_length; i += 4) 427 if (buffer[i] != 0) { 428 int cable = buffer[i] >> 4; 429 u8 cin = buffer[i] & 0x0f; 430 struct usbmidi_in_port *port = &ep->ports[cable]; 431 int length; 432 433 length = snd_usbmidi_cin_length[cin]; 434 if (cin == 0xf && buffer[i + 1] >= 0xf8) 435 ; /* realtime msg: no running status change */ 436 else if (cin >= 0x8 && cin <= 0xe) 437 /* channel msg */ 438 port->running_status_length = length - 1; 439 else if (cin == 0x4 && 440 port->running_status_length != 0 && 441 buffer[i + 1] < 0x80) 442 /* CIN 4 that is not a SysEx */ 443 length = port->running_status_length; 444 else 445 /* 446 * All other msgs cannot begin running status. 447 * (A channel msg sent as two or three CIN 0xF 448 * packets could in theory, but this device 449 * doesn't use this format.) 450 */ 451 port->running_status_length = 0; 452 snd_usbmidi_input_data(ep, cable, &buffer[i + 1], 453 length); 454 } 455} 456 457/* 458 * QinHeng CH345 is buggy: every second packet inside a SysEx has not CIN 4 459 * but the previously seen CIN, but still with three data bytes. 460 */ 461static void ch345_broken_sysex_input(struct snd_usb_midi_in_endpoint *ep, 462 uint8_t *buffer, int buffer_length) 463{ 464 unsigned int i, cin, length; 465 466 for (i = 0; i + 3 < buffer_length; i += 4) { 467 if (buffer[i] == 0 && i > 0) 468 break; 469 cin = buffer[i] & 0x0f; 470 if (ep->in_sysex && 471 cin == ep->last_cin && 472 (buffer[i + 1 + (cin == 0x6)] & 0x80) == 0) 473 cin = 0x4; 474#if 0 475 if (buffer[i + 1] == 0x90) { 476 /* 477 * Either a corrupted running status or a real note-on 478 * message; impossible to detect reliably. 479 */ 480 } 481#endif 482 length = snd_usbmidi_cin_length[cin]; 483 snd_usbmidi_input_data(ep, 0, &buffer[i + 1], length); 484 ep->in_sysex = cin == 0x4; 485 if (!ep->in_sysex) 486 ep->last_cin = cin; 487 } 488} 489 490/* 491 * CME protocol: like the standard protocol, but SysEx commands are sent as a 492 * single USB packet preceded by a 0x0F byte. 493 */ 494static void snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint *ep, 495 uint8_t *buffer, int buffer_length) 496{ 497 if (buffer_length < 2 || (buffer[0] & 0x0f) != 0x0f) 498 snd_usbmidi_standard_input(ep, buffer, buffer_length); 499 else 500 snd_usbmidi_input_data(ep, buffer[0] >> 4, 501 &buffer[1], buffer_length - 1); 502} 503 504/* 505 * Adds one USB MIDI packet to the output buffer. 506 */ 507static void snd_usbmidi_output_standard_packet(struct urb *urb, uint8_t p0, 508 uint8_t p1, uint8_t p2, 509 uint8_t p3) 510{ 511 512 uint8_t *buf = 513 (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length; 514 buf[0] = p0; 515 buf[1] = p1; 516 buf[2] = p2; 517 buf[3] = p3; 518 urb->transfer_buffer_length += 4; 519} 520 521/* 522 * Adds one Midiman packet to the output buffer. 523 */ 524static void snd_usbmidi_output_midiman_packet(struct urb *urb, uint8_t p0, 525 uint8_t p1, uint8_t p2, 526 uint8_t p3) 527{ 528 529 uint8_t *buf = 530 (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length; 531 buf[0] = p1; 532 buf[1] = p2; 533 buf[2] = p3; 534 buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f]; 535 urb->transfer_buffer_length += 4; 536} 537 538/* 539 * Converts MIDI commands to USB MIDI packets. 540 */ 541static void snd_usbmidi_transmit_byte(struct usbmidi_out_port *port, 542 uint8_t b, struct urb *urb) 543{ 544 uint8_t p0 = port->cable; 545 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) = 546 port->ep->umidi->usb_protocol_ops->output_packet; 547 548 if (b >= 0xf8) { 549 output_packet(urb, p0 | 0x0f, b, 0, 0); 550 } else if (b >= 0xf0) { 551 switch (b) { 552 case 0xf0: 553 port->data[0] = b; 554 port->state = STATE_SYSEX_1; 555 break; 556 case 0xf1: 557 case 0xf3: 558 port->data[0] = b; 559 port->state = STATE_1PARAM; 560 break; 561 case 0xf2: 562 port->data[0] = b; 563 port->state = STATE_2PARAM_1; 564 break; 565 case 0xf4: 566 case 0xf5: 567 port->state = STATE_UNKNOWN; 568 break; 569 case 0xf6: 570 output_packet(urb, p0 | 0x05, 0xf6, 0, 0); 571 port->state = STATE_UNKNOWN; 572 break; 573 case 0xf7: 574 switch (port->state) { 575 case STATE_SYSEX_0: 576 output_packet(urb, p0 | 0x05, 0xf7, 0, 0); 577 break; 578 case STATE_SYSEX_1: 579 output_packet(urb, p0 | 0x06, port->data[0], 580 0xf7, 0); 581 break; 582 case STATE_SYSEX_2: 583 output_packet(urb, p0 | 0x07, port->data[0], 584 port->data[1], 0xf7); 585 break; 586 } 587 port->state = STATE_UNKNOWN; 588 break; 589 } 590 } else if (b >= 0x80) { 591 port->data[0] = b; 592 if (b >= 0xc0 && b <= 0xdf) 593 port->state = STATE_1PARAM; 594 else 595 port->state = STATE_2PARAM_1; 596 } else { /* b < 0x80 */ 597 switch (port->state) { 598 case STATE_1PARAM: 599 if (port->data[0] < 0xf0) { 600 p0 |= port->data[0] >> 4; 601 } else { 602 p0 |= 0x02; 603 port->state = STATE_UNKNOWN; 604 } 605 output_packet(urb, p0, port->data[0], b, 0); 606 break; 607 case STATE_2PARAM_1: 608 port->data[1] = b; 609 port->state = STATE_2PARAM_2; 610 break; 611 case STATE_2PARAM_2: 612 if (port->data[0] < 0xf0) { 613 p0 |= port->data[0] >> 4; 614 port->state = STATE_2PARAM_1; 615 } else { 616 p0 |= 0x03; 617 port->state = STATE_UNKNOWN; 618 } 619 output_packet(urb, p0, port->data[0], port->data[1], b); 620 break; 621 case STATE_SYSEX_0: 622 port->data[0] = b; 623 port->state = STATE_SYSEX_1; 624 break; 625 case STATE_SYSEX_1: 626 port->data[1] = b; 627 port->state = STATE_SYSEX_2; 628 break; 629 case STATE_SYSEX_2: 630 output_packet(urb, p0 | 0x04, port->data[0], 631 port->data[1], b); 632 port->state = STATE_SYSEX_0; 633 break; 634 } 635 } 636} 637 638static void snd_usbmidi_standard_output(struct snd_usb_midi_out_endpoint *ep, 639 struct urb *urb) 640{ 641 int p; 642 643 /* FIXME: lower-numbered ports can starve higher-numbered ports */ 644 for (p = 0; p < 0x10; ++p) { 645 struct usbmidi_out_port *port = &ep->ports[p]; 646 if (!port->active) 647 continue; 648 while (urb->transfer_buffer_length + 3 < ep->max_transfer) { 649 uint8_t b; 650 if (snd_rawmidi_transmit(port->substream, &b, 1) != 1) { 651 port->active = 0; 652 break; 653 } 654 snd_usbmidi_transmit_byte(port, b, urb); 655 } 656 } 657} 658 659static const struct usb_protocol_ops snd_usbmidi_standard_ops = { 660 .input = snd_usbmidi_standard_input, 661 .output = snd_usbmidi_standard_output, 662 .output_packet = snd_usbmidi_output_standard_packet, 663}; 664 665static const struct usb_protocol_ops snd_usbmidi_midiman_ops = { 666 .input = snd_usbmidi_midiman_input, 667 .output = snd_usbmidi_standard_output, 668 .output_packet = snd_usbmidi_output_midiman_packet, 669}; 670 671static const 672struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = { 673 .input = snd_usbmidi_maudio_broken_running_status_input, 674 .output = snd_usbmidi_standard_output, 675 .output_packet = snd_usbmidi_output_standard_packet, 676}; 677 678static const struct usb_protocol_ops snd_usbmidi_cme_ops = { 679 .input = snd_usbmidi_cme_input, 680 .output = snd_usbmidi_standard_output, 681 .output_packet = snd_usbmidi_output_standard_packet, 682}; 683 684static const struct usb_protocol_ops snd_usbmidi_ch345_broken_sysex_ops = { 685 .input = ch345_broken_sysex_input, 686 .output = snd_usbmidi_standard_output, 687 .output_packet = snd_usbmidi_output_standard_packet, 688}; 689 690/* 691 * AKAI MPD16 protocol: 692 * 693 * For control port (endpoint 1): 694 * ============================== 695 * One or more chunks consisting of first byte of (0x10 | msg_len) and then a 696 * SysEx message (msg_len=9 bytes long). 697 * 698 * For data port (endpoint 2): 699 * =========================== 700 * One or more chunks consisting of first byte of (0x20 | msg_len) and then a 701 * MIDI message (msg_len bytes long) 702 * 703 * Messages sent: Active Sense, Note On, Poly Pressure, Control Change. 704 */ 705static void snd_usbmidi_akai_input(struct snd_usb_midi_in_endpoint *ep, 706 uint8_t *buffer, int buffer_length) 707{ 708 unsigned int pos = 0; 709 unsigned int len = (unsigned int)buffer_length; 710 while (pos < len) { 711 unsigned int port = (buffer[pos] >> 4) - 1; 712 unsigned int msg_len = buffer[pos] & 0x0f; 713 pos++; 714 if (pos + msg_len <= len && port < 2) 715 snd_usbmidi_input_data(ep, 0, &buffer[pos], msg_len); 716 pos += msg_len; 717 } 718} 719 720#define MAX_AKAI_SYSEX_LEN 9 721 722static void snd_usbmidi_akai_output(struct snd_usb_midi_out_endpoint *ep, 723 struct urb *urb) 724{ 725 uint8_t *msg; 726 int pos, end, count, buf_end; 727 uint8_t tmp[MAX_AKAI_SYSEX_LEN]; 728 struct snd_rawmidi_substream *substream = ep->ports[0].substream; 729 730 if (!ep->ports[0].active) 731 return; 732 733 msg = urb->transfer_buffer + urb->transfer_buffer_length; 734 buf_end = ep->max_transfer - MAX_AKAI_SYSEX_LEN - 1; 735 736 /* only try adding more data when there's space for at least 1 SysEx */ 737 while (urb->transfer_buffer_length < buf_end) { 738 count = snd_rawmidi_transmit_peek(substream, 739 tmp, MAX_AKAI_SYSEX_LEN); 740 if (!count) { 741 ep->ports[0].active = 0; 742 return; 743 } 744 /* try to skip non-SysEx data */ 745 for (pos = 0; pos < count && tmp[pos] != 0xF0; pos++) 746 ; 747 748 if (pos > 0) { 749 snd_rawmidi_transmit_ack(substream, pos); 750 continue; 751 } 752 753 /* look for the start or end marker */ 754 for (end = 1; end < count && tmp[end] < 0xF0; end++) 755 ; 756 757 /* next SysEx started before the end of current one */ 758 if (end < count && tmp[end] == 0xF0) { 759 /* it's incomplete - drop it */ 760 snd_rawmidi_transmit_ack(substream, end); 761 continue; 762 } 763 /* SysEx complete */ 764 if (end < count && tmp[end] == 0xF7) { 765 /* queue it, ack it, and get the next one */ 766 count = end + 1; 767 msg[0] = 0x10 | count; 768 memcpy(&msg[1], tmp, count); 769 snd_rawmidi_transmit_ack(substream, count); 770 urb->transfer_buffer_length += count + 1; 771 msg += count + 1; 772 continue; 773 } 774 /* less than 9 bytes and no end byte - wait for more */ 775 if (count < MAX_AKAI_SYSEX_LEN) { 776 ep->ports[0].active = 0; 777 return; 778 } 779 /* 9 bytes and no end marker in sight - malformed, skip it */ 780 snd_rawmidi_transmit_ack(substream, count); 781 } 782} 783 784static const struct usb_protocol_ops snd_usbmidi_akai_ops = { 785 .input = snd_usbmidi_akai_input, 786 .output = snd_usbmidi_akai_output, 787}; 788 789/* 790 * Novation USB MIDI protocol: number of data bytes is in the first byte 791 * (when receiving) (+1!) or in the second byte (when sending); data begins 792 * at the third byte. 793 */ 794 795static void snd_usbmidi_novation_input(struct snd_usb_midi_in_endpoint *ep, 796 uint8_t *buffer, int buffer_length) 797{ 798 if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1) 799 return; 800 snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1); 801} 802 803static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint *ep, 804 struct urb *urb) 805{ 806 uint8_t *transfer_buffer; 807 int count; 808 809 if (!ep->ports[0].active) 810 return; 811 transfer_buffer = urb->transfer_buffer; 812 count = snd_rawmidi_transmit(ep->ports[0].substream, 813 &transfer_buffer[2], 814 ep->max_transfer - 2); 815 if (count < 1) { 816 ep->ports[0].active = 0; 817 return; 818 } 819 transfer_buffer[0] = 0; 820 transfer_buffer[1] = count; 821 urb->transfer_buffer_length = 2 + count; 822} 823 824static const struct usb_protocol_ops snd_usbmidi_novation_ops = { 825 .input = snd_usbmidi_novation_input, 826 .output = snd_usbmidi_novation_output, 827}; 828 829/* 830 * "raw" protocol: just move raw MIDI bytes from/to the endpoint 831 */ 832 833static void snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint *ep, 834 uint8_t *buffer, int buffer_length) 835{ 836 snd_usbmidi_input_data(ep, 0, buffer, buffer_length); 837} 838 839static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint *ep, 840 struct urb *urb) 841{ 842 int count; 843 844 if (!ep->ports[0].active) 845 return; 846 count = snd_rawmidi_transmit(ep->ports[0].substream, 847 urb->transfer_buffer, 848 ep->max_transfer); 849 if (count < 1) { 850 ep->ports[0].active = 0; 851 return; 852 } 853 urb->transfer_buffer_length = count; 854} 855 856static const struct usb_protocol_ops snd_usbmidi_raw_ops = { 857 .input = snd_usbmidi_raw_input, 858 .output = snd_usbmidi_raw_output, 859}; 860 861/* 862 * FTDI protocol: raw MIDI bytes, but input packets have two modem status bytes. 863 */ 864 865static void snd_usbmidi_ftdi_input(struct snd_usb_midi_in_endpoint *ep, 866 uint8_t *buffer, int buffer_length) 867{ 868 if (buffer_length > 2) 869 snd_usbmidi_input_data(ep, 0, buffer + 2, buffer_length - 2); 870} 871 872static const struct usb_protocol_ops snd_usbmidi_ftdi_ops = { 873 .input = snd_usbmidi_ftdi_input, 874 .output = snd_usbmidi_raw_output, 875}; 876 877static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep, 878 uint8_t *buffer, int buffer_length) 879{ 880 if (buffer_length != 9) 881 return; 882 buffer_length = 8; 883 while (buffer_length && buffer[buffer_length - 1] == 0xFD) 884 buffer_length--; 885 if (buffer_length) 886 snd_usbmidi_input_data(ep, 0, buffer, buffer_length); 887} 888 889static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep, 890 struct urb *urb) 891{ 892 int count; 893 894 if (!ep->ports[0].active) 895 return; 896 switch (snd_usb_get_speed(ep->umidi->dev)) { 897 case USB_SPEED_HIGH: 898 case USB_SPEED_SUPER: 899 case USB_SPEED_SUPER_PLUS: 900 count = 1; 901 break; 902 default: 903 count = 2; 904 } 905 count = snd_rawmidi_transmit(ep->ports[0].substream, 906 urb->transfer_buffer, 907 count); 908 if (count < 1) { 909 ep->ports[0].active = 0; 910 return; 911 } 912 913 memset(urb->transfer_buffer + count, 0xFD, ep->max_transfer - count); 914 urb->transfer_buffer_length = ep->max_transfer; 915} 916 917static const struct usb_protocol_ops snd_usbmidi_122l_ops = { 918 .input = snd_usbmidi_us122l_input, 919 .output = snd_usbmidi_us122l_output, 920}; 921 922/* 923 * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching. 924 */ 925 926static void snd_usbmidi_emagic_init_out(struct snd_usb_midi_out_endpoint *ep) 927{ 928 static const u8 init_data[] = { 929 /* initialization magic: "get version" */ 930 0xf0, 931 0x00, 0x20, 0x31, /* Emagic */ 932 0x64, /* Unitor8 */ 933 0x0b, /* version number request */ 934 0x00, /* command version */ 935 0x00, /* EEPROM, box 0 */ 936 0xf7 937 }; 938 send_bulk_static_data(ep, init_data, sizeof(init_data)); 939 /* while we're at it, pour on more magic */ 940 send_bulk_static_data(ep, init_data, sizeof(init_data)); 941} 942 943static void snd_usbmidi_emagic_finish_out(struct snd_usb_midi_out_endpoint *ep) 944{ 945 static const u8 finish_data[] = { 946 /* switch to patch mode with last preset */ 947 0xf0, 948 0x00, 0x20, 0x31, /* Emagic */ 949 0x64, /* Unitor8 */ 950 0x10, /* patch switch command */ 951 0x00, /* command version */ 952 0x7f, /* to all boxes */ 953 0x40, /* last preset in EEPROM */ 954 0xf7 955 }; 956 send_bulk_static_data(ep, finish_data, sizeof(finish_data)); 957} 958 959static void snd_usbmidi_emagic_input(struct snd_usb_midi_in_endpoint *ep, 960 uint8_t *buffer, int buffer_length) 961{ 962 int i; 963 964 /* FF indicates end of valid data */ 965 for (i = 0; i < buffer_length; ++i) 966 if (buffer[i] == 0xff) { 967 buffer_length = i; 968 break; 969 } 970 971 /* handle F5 at end of last buffer */ 972 if (ep->seen_f5) 973 goto switch_port; 974 975 while (buffer_length > 0) { 976 /* determine size of data until next F5 */ 977 for (i = 0; i < buffer_length; ++i) 978 if (buffer[i] == 0xf5) 979 break; 980 snd_usbmidi_input_data(ep, ep->current_port, buffer, i); 981 buffer += i; 982 buffer_length -= i; 983 984 if (buffer_length <= 0) 985 break; 986 /* assert(buffer[0] == 0xf5); */ 987 ep->seen_f5 = 1; 988 ++buffer; 989 --buffer_length; 990 991 switch_port: 992 if (buffer_length <= 0) 993 break; 994 if (buffer[0] < 0x80) { 995 ep->current_port = (buffer[0] - 1) & 15; 996 ++buffer; 997 --buffer_length; 998 } 999 ep->seen_f5 = 0; 1000 } 1001} 1002 1003static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint *ep, 1004 struct urb *urb) 1005{ 1006 int port0 = ep->current_port; 1007 uint8_t *buf = urb->transfer_buffer; 1008 int buf_free = ep->max_transfer; 1009 int length, i; 1010 1011 for (i = 0; i < 0x10; ++i) { 1012 /* round-robin, starting at the last current port */ 1013 int portnum = (port0 + i) & 15; 1014 struct usbmidi_out_port *port = &ep->ports[portnum]; 1015 1016 if (!port->active) 1017 continue; 1018 if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) { 1019 port->active = 0; 1020 continue; 1021 } 1022 1023 if (portnum != ep->current_port) { 1024 if (buf_free < 2) 1025 break; 1026 ep->current_port = portnum; 1027 buf[0] = 0xf5; 1028 buf[1] = (portnum + 1) & 15; 1029 buf += 2; 1030 buf_free -= 2; 1031 } 1032 1033 if (buf_free < 1) 1034 break; 1035 length = snd_rawmidi_transmit(port->substream, buf, buf_free); 1036 if (length > 0) { 1037 buf += length; 1038 buf_free -= length; 1039 if (buf_free < 1) 1040 break; 1041 } 1042 } 1043 if (buf_free < ep->max_transfer && buf_free > 0) { 1044 *buf = 0xff; 1045 --buf_free; 1046 } 1047 urb->transfer_buffer_length = ep->max_transfer - buf_free; 1048} 1049 1050static const struct usb_protocol_ops snd_usbmidi_emagic_ops = { 1051 .input = snd_usbmidi_emagic_input, 1052 .output = snd_usbmidi_emagic_output, 1053 .init_out_endpoint = snd_usbmidi_emagic_init_out, 1054 .finish_out_endpoint = snd_usbmidi_emagic_finish_out, 1055}; 1056 1057 1058static void update_roland_altsetting(struct snd_usb_midi *umidi) 1059{ 1060 struct usb_interface *intf; 1061 struct usb_host_interface *hostif; 1062 struct usb_interface_descriptor *intfd; 1063 int is_light_load; 1064 1065 intf = umidi->iface; 1066 is_light_load = intf->cur_altsetting != intf->altsetting; 1067 if (umidi->roland_load_ctl->private_value == is_light_load) 1068 return; 1069 hostif = &intf->altsetting[umidi->roland_load_ctl->private_value]; 1070 intfd = get_iface_desc(hostif); 1071 snd_usbmidi_input_stop(&umidi->list); 1072 usb_set_interface(umidi->dev, intfd->bInterfaceNumber, 1073 intfd->bAlternateSetting); 1074 snd_usbmidi_input_start(&umidi->list); 1075} 1076 1077static int substream_open(struct snd_rawmidi_substream *substream, int dir, 1078 int open) 1079{ 1080 struct snd_usb_midi *umidi = substream->rmidi->private_data; 1081 struct snd_kcontrol *ctl; 1082 1083 down_read(&umidi->disc_rwsem); 1084 if (umidi->disconnected) { 1085 up_read(&umidi->disc_rwsem); 1086 return open ? -ENODEV : 0; 1087 } 1088 1089 mutex_lock(&umidi->mutex); 1090 if (open) { 1091 if (!umidi->opened[0] && !umidi->opened[1]) { 1092 if (umidi->roland_load_ctl) { 1093 ctl = umidi->roland_load_ctl; 1094 ctl->vd[0].access |= 1095 SNDRV_CTL_ELEM_ACCESS_INACTIVE; 1096 snd_ctl_notify(umidi->card, 1097 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id); 1098 update_roland_altsetting(umidi); 1099 } 1100 } 1101 umidi->opened[dir]++; 1102 if (umidi->opened[1]) 1103 snd_usbmidi_input_start(&umidi->list); 1104 } else { 1105 umidi->opened[dir]--; 1106 if (!umidi->opened[1]) 1107 snd_usbmidi_input_stop(&umidi->list); 1108 if (!umidi->opened[0] && !umidi->opened[1]) { 1109 if (umidi->roland_load_ctl) { 1110 ctl = umidi->roland_load_ctl; 1111 ctl->vd[0].access &= 1112 ~SNDRV_CTL_ELEM_ACCESS_INACTIVE; 1113 snd_ctl_notify(umidi->card, 1114 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id); 1115 } 1116 } 1117 } 1118 mutex_unlock(&umidi->mutex); 1119 up_read(&umidi->disc_rwsem); 1120 return 0; 1121} 1122 1123static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream) 1124{ 1125 struct snd_usb_midi *umidi = substream->rmidi->private_data; 1126 struct usbmidi_out_port *port = NULL; 1127 int i, j; 1128 1129 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) 1130 if (umidi->endpoints[i].out) 1131 for (j = 0; j < 0x10; ++j) 1132 if (umidi->endpoints[i].out->ports[j].substream == substream) { 1133 port = &umidi->endpoints[i].out->ports[j]; 1134 break; 1135 } 1136 if (!port) 1137 return -ENXIO; 1138 1139 substream->runtime->private_data = port; 1140 port->state = STATE_UNKNOWN; 1141 return substream_open(substream, 0, 1); 1142} 1143 1144static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream) 1145{ 1146 struct usbmidi_out_port *port = substream->runtime->private_data; 1147 1148 cancel_work_sync(&port->ep->work); 1149 return substream_open(substream, 0, 0); 1150} 1151 1152static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream, 1153 int up) 1154{ 1155 struct usbmidi_out_port *port = 1156 (struct usbmidi_out_port *)substream->runtime->private_data; 1157 1158 port->active = up; 1159 if (up) { 1160 if (port->ep->umidi->disconnected) { 1161 /* gobble up remaining bytes to prevent wait in 1162 * snd_rawmidi_drain_output */ 1163 snd_rawmidi_proceed(substream); 1164 return; 1165 } 1166 queue_work(system_highpri_wq, &port->ep->work); 1167 } 1168} 1169 1170static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream) 1171{ 1172 struct usbmidi_out_port *port = substream->runtime->private_data; 1173 struct snd_usb_midi_out_endpoint *ep = port->ep; 1174 unsigned int drain_urbs; 1175 DEFINE_WAIT(wait); 1176 long timeout = msecs_to_jiffies(50); 1177 1178 if (ep->umidi->disconnected) 1179 return; 1180 /* 1181 * The substream buffer is empty, but some data might still be in the 1182 * currently active URBs, so we have to wait for those to complete. 1183 */ 1184 spin_lock_irq(&ep->buffer_lock); 1185 drain_urbs = ep->active_urbs; 1186 if (drain_urbs) { 1187 ep->drain_urbs |= drain_urbs; 1188 do { 1189 prepare_to_wait(&ep->drain_wait, &wait, 1190 TASK_UNINTERRUPTIBLE); 1191 spin_unlock_irq(&ep->buffer_lock); 1192 timeout = schedule_timeout(timeout); 1193 spin_lock_irq(&ep->buffer_lock); 1194 drain_urbs &= ep->drain_urbs; 1195 } while (drain_urbs && timeout); 1196 finish_wait(&ep->drain_wait, &wait); 1197 } 1198 port->active = 0; 1199 spin_unlock_irq(&ep->buffer_lock); 1200} 1201 1202static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream) 1203{ 1204 return substream_open(substream, 1, 1); 1205} 1206 1207static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream) 1208{ 1209 return substream_open(substream, 1, 0); 1210} 1211 1212static void snd_usbmidi_input_trigger(struct snd_rawmidi_substream *substream, 1213 int up) 1214{ 1215 struct snd_usb_midi *umidi = substream->rmidi->private_data; 1216 1217 if (up) 1218 set_bit(substream->number, &umidi->input_triggered); 1219 else 1220 clear_bit(substream->number, &umidi->input_triggered); 1221} 1222 1223static const struct snd_rawmidi_ops snd_usbmidi_output_ops = { 1224 .open = snd_usbmidi_output_open, 1225 .close = snd_usbmidi_output_close, 1226 .trigger = snd_usbmidi_output_trigger, 1227 .drain = snd_usbmidi_output_drain, 1228}; 1229 1230static const struct snd_rawmidi_ops snd_usbmidi_input_ops = { 1231 .open = snd_usbmidi_input_open, 1232 .close = snd_usbmidi_input_close, 1233 .trigger = snd_usbmidi_input_trigger 1234}; 1235 1236static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb, 1237 unsigned int buffer_length) 1238{ 1239 usb_free_coherent(umidi->dev, buffer_length, 1240 urb->transfer_buffer, urb->transfer_dma); 1241 usb_free_urb(urb); 1242} 1243 1244/* 1245 * Frees an input endpoint. 1246 * May be called when ep hasn't been initialized completely. 1247 */ 1248static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint *ep) 1249{ 1250 unsigned int i; 1251 1252 for (i = 0; i < INPUT_URBS; ++i) 1253 if (ep->urbs[i]) 1254 free_urb_and_buffer(ep->umidi, ep->urbs[i], 1255 ep->urbs[i]->transfer_buffer_length); 1256 kfree(ep); 1257} 1258 1259/* 1260 * Creates an input endpoint. 1261 */ 1262static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi *umidi, 1263 struct snd_usb_midi_endpoint_info *ep_info, 1264 struct snd_usb_midi_endpoint *rep) 1265{ 1266 struct snd_usb_midi_in_endpoint *ep; 1267 void *buffer; 1268 unsigned int pipe; 1269 int length; 1270 unsigned int i; 1271 int err; 1272 1273 rep->in = NULL; 1274 ep = kzalloc(sizeof(*ep), GFP_KERNEL); 1275 if (!ep) 1276 return -ENOMEM; 1277 ep->umidi = umidi; 1278 1279 for (i = 0; i < INPUT_URBS; ++i) { 1280 ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL); 1281 if (!ep->urbs[i]) { 1282 err = -ENOMEM; 1283 goto error; 1284 } 1285 } 1286 if (ep_info->in_interval) 1287 pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep); 1288 else 1289 pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep); 1290 length = usb_maxpacket(umidi->dev, pipe); 1291 for (i = 0; i < INPUT_URBS; ++i) { 1292 buffer = usb_alloc_coherent(umidi->dev, length, GFP_KERNEL, 1293 &ep->urbs[i]->transfer_dma); 1294 if (!buffer) { 1295 err = -ENOMEM; 1296 goto error; 1297 } 1298 if (ep_info->in_interval) 1299 usb_fill_int_urb(ep->urbs[i], umidi->dev, 1300 pipe, buffer, length, 1301 snd_usbmidi_in_urb_complete, 1302 ep, ep_info->in_interval); 1303 else 1304 usb_fill_bulk_urb(ep->urbs[i], umidi->dev, 1305 pipe, buffer, length, 1306 snd_usbmidi_in_urb_complete, ep); 1307 ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP; 1308 err = usb_urb_ep_type_check(ep->urbs[i]); 1309 if (err < 0) { 1310 dev_err(&umidi->dev->dev, "invalid MIDI in EP %x\n", 1311 ep_info->in_ep); 1312 goto error; 1313 } 1314 } 1315 1316 rep->in = ep; 1317 return 0; 1318 1319 error: 1320 snd_usbmidi_in_endpoint_delete(ep); 1321 return err; 1322} 1323 1324/* 1325 * Frees an output endpoint. 1326 * May be called when ep hasn't been initialized completely. 1327 */ 1328static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep) 1329{ 1330 unsigned int i; 1331 1332 for (i = 0; i < OUTPUT_URBS; ++i) 1333 if (ep->urbs[i].urb) { 1334 free_urb_and_buffer(ep->umidi, ep->urbs[i].urb, 1335 ep->max_transfer); 1336 ep->urbs[i].urb = NULL; 1337 } 1338} 1339 1340static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep) 1341{ 1342 snd_usbmidi_out_endpoint_clear(ep); 1343 kfree(ep); 1344} 1345 1346/* 1347 * Creates an output endpoint, and initializes output ports. 1348 */ 1349static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi *umidi, 1350 struct snd_usb_midi_endpoint_info *ep_info, 1351 struct snd_usb_midi_endpoint *rep) 1352{ 1353 struct snd_usb_midi_out_endpoint *ep; 1354 unsigned int i; 1355 unsigned int pipe; 1356 void *buffer; 1357 int err; 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 err = -ENOMEM; 1369 goto error; 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); 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 err = -ENOMEM; 1408 goto error; 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 err = usb_urb_ep_type_check(ep->urbs[i].urb); 1421 if (err < 0) { 1422 dev_err(&umidi->dev->dev, "invalid MIDI out EP %x\n", 1423 ep_info->out_ep); 1424 goto error; 1425 } 1426 ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; 1427 } 1428 1429 spin_lock_init(&ep->buffer_lock); 1430 INIT_WORK(&ep->work, snd_usbmidi_out_work); 1431 init_waitqueue_head(&ep->drain_wait); 1432 1433 for (i = 0; i < 0x10; ++i) 1434 if (ep_info->out_cables & (1 << i)) { 1435 ep->ports[i].ep = ep; 1436 ep->ports[i].cable = i << 4; 1437 } 1438 1439 if (umidi->usb_protocol_ops->init_out_endpoint) 1440 umidi->usb_protocol_ops->init_out_endpoint(ep); 1441 1442 rep->out = ep; 1443 return 0; 1444 1445 error: 1446 snd_usbmidi_out_endpoint_delete(ep); 1447 return err; 1448} 1449 1450/* 1451 * Frees everything. 1452 */ 1453static void snd_usbmidi_free(struct snd_usb_midi *umidi) 1454{ 1455 int i; 1456 1457 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 1458 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i]; 1459 if (ep->out) 1460 snd_usbmidi_out_endpoint_delete(ep->out); 1461 if (ep->in) 1462 snd_usbmidi_in_endpoint_delete(ep->in); 1463 } 1464 mutex_destroy(&umidi->mutex); 1465 kfree(umidi); 1466} 1467 1468/* 1469 * Unlinks all URBs (must be done before the usb_device is deleted). 1470 */ 1471void snd_usbmidi_disconnect(struct list_head *p) 1472{ 1473 struct snd_usb_midi *umidi; 1474 unsigned int i, j; 1475 1476 umidi = list_entry(p, struct snd_usb_midi, list); 1477 /* 1478 * an URB's completion handler may start the timer and 1479 * a timer may submit an URB. To reliably break the cycle 1480 * a flag under lock must be used 1481 */ 1482 down_write(&umidi->disc_rwsem); 1483 spin_lock_irq(&umidi->disc_lock); 1484 umidi->disconnected = 1; 1485 spin_unlock_irq(&umidi->disc_lock); 1486 up_write(&umidi->disc_rwsem); 1487 1488 del_timer_sync(&umidi->error_timer); 1489 1490 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 1491 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i]; 1492 if (ep->out) 1493 cancel_work_sync(&ep->out->work); 1494 if (ep->out) { 1495 for (j = 0; j < OUTPUT_URBS; ++j) 1496 usb_kill_urb(ep->out->urbs[j].urb); 1497 if (umidi->usb_protocol_ops->finish_out_endpoint) 1498 umidi->usb_protocol_ops->finish_out_endpoint(ep->out); 1499 ep->out->active_urbs = 0; 1500 if (ep->out->drain_urbs) { 1501 ep->out->drain_urbs = 0; 1502 wake_up(&ep->out->drain_wait); 1503 } 1504 } 1505 if (ep->in) 1506 for (j = 0; j < INPUT_URBS; ++j) 1507 usb_kill_urb(ep->in->urbs[j]); 1508 /* free endpoints here; later call can result in Oops */ 1509 if (ep->out) 1510 snd_usbmidi_out_endpoint_clear(ep->out); 1511 if (ep->in) { 1512 snd_usbmidi_in_endpoint_delete(ep->in); 1513 ep->in = NULL; 1514 } 1515 } 1516} 1517EXPORT_SYMBOL(snd_usbmidi_disconnect); 1518 1519static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi) 1520{ 1521 struct snd_usb_midi *umidi = rmidi->private_data; 1522 snd_usbmidi_free(umidi); 1523} 1524 1525static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi *umidi, 1526 int stream, 1527 int number) 1528{ 1529 struct snd_rawmidi_substream *substream; 1530 1531 list_for_each_entry(substream, &umidi->rmidi->streams[stream].substreams, 1532 list) { 1533 if (substream->number == number) 1534 return substream; 1535 } 1536 return NULL; 1537} 1538 1539/* 1540 * This list specifies names for ports that do not fit into the standard 1541 * "(product) MIDI (n)" schema because they aren't external MIDI ports, 1542 * such as internal control or synthesizer ports. 1543 */ 1544static struct port_info { 1545 u32 id; 1546 short int port; 1547 short int voices; 1548 const char *name; 1549 unsigned int seq_flags; 1550} snd_usbmidi_port_info[] = { 1551#define PORT_INFO(vendor, product, num, name_, voices_, flags) \ 1552 { .id = USB_ID(vendor, product), \ 1553 .port = num, .voices = voices_, \ 1554 .name = name_, .seq_flags = flags } 1555#define EXTERNAL_PORT(vendor, product, num, name) \ 1556 PORT_INFO(vendor, product, num, name, 0, \ 1557 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1558 SNDRV_SEQ_PORT_TYPE_HARDWARE | \ 1559 SNDRV_SEQ_PORT_TYPE_PORT) 1560#define CONTROL_PORT(vendor, product, num, name) \ 1561 PORT_INFO(vendor, product, num, name, 0, \ 1562 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1563 SNDRV_SEQ_PORT_TYPE_HARDWARE) 1564#define GM_SYNTH_PORT(vendor, product, num, name, voices) \ 1565 PORT_INFO(vendor, product, num, name, voices, \ 1566 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1567 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \ 1568 SNDRV_SEQ_PORT_TYPE_HARDWARE | \ 1569 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER) 1570#define ROLAND_SYNTH_PORT(vendor, product, num, name, voices) \ 1571 PORT_INFO(vendor, product, num, name, voices, \ 1572 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1573 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \ 1574 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \ 1575 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \ 1576 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \ 1577 SNDRV_SEQ_PORT_TYPE_HARDWARE | \ 1578 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER) 1579#define SOUNDCANVAS_PORT(vendor, product, num, name, voices) \ 1580 PORT_INFO(vendor, product, num, name, voices, \ 1581 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1582 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \ 1583 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \ 1584 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \ 1585 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \ 1586 SNDRV_SEQ_PORT_TYPE_MIDI_MT32 | \ 1587 SNDRV_SEQ_PORT_TYPE_HARDWARE | \ 1588 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER) 1589 /* Yamaha MOTIF XF */ 1590 GM_SYNTH_PORT(0x0499, 0x105c, 0, "%s Tone Generator", 128), 1591 CONTROL_PORT(0x0499, 0x105c, 1, "%s Remote Control"), 1592 EXTERNAL_PORT(0x0499, 0x105c, 2, "%s Thru"), 1593 CONTROL_PORT(0x0499, 0x105c, 3, "%s Editor"), 1594 /* Roland UA-100 */ 1595 CONTROL_PORT(0x0582, 0x0000, 2, "%s Control"), 1596 /* Roland SC-8850 */ 1597 SOUNDCANVAS_PORT(0x0582, 0x0003, 0, "%s Part A", 128), 1598 SOUNDCANVAS_PORT(0x0582, 0x0003, 1, "%s Part B", 128), 1599 SOUNDCANVAS_PORT(0x0582, 0x0003, 2, "%s Part C", 128), 1600 SOUNDCANVAS_PORT(0x0582, 0x0003, 3, "%s Part D", 128), 1601 EXTERNAL_PORT(0x0582, 0x0003, 4, "%s MIDI 1"), 1602 EXTERNAL_PORT(0x0582, 0x0003, 5, "%s MIDI 2"), 1603 /* Roland U-8 */ 1604 EXTERNAL_PORT(0x0582, 0x0004, 0, "%s MIDI"), 1605 CONTROL_PORT(0x0582, 0x0004, 1, "%s Control"), 1606 /* Roland SC-8820 */ 1607 SOUNDCANVAS_PORT(0x0582, 0x0007, 0, "%s Part A", 64), 1608 SOUNDCANVAS_PORT(0x0582, 0x0007, 1, "%s Part B", 64), 1609 EXTERNAL_PORT(0x0582, 0x0007, 2, "%s MIDI"), 1610 /* Roland SK-500 */ 1611 SOUNDCANVAS_PORT(0x0582, 0x000b, 0, "%s Part A", 64), 1612 SOUNDCANVAS_PORT(0x0582, 0x000b, 1, "%s Part B", 64), 1613 EXTERNAL_PORT(0x0582, 0x000b, 2, "%s MIDI"), 1614 /* Roland SC-D70 */ 1615 SOUNDCANVAS_PORT(0x0582, 0x000c, 0, "%s Part A", 64), 1616 SOUNDCANVAS_PORT(0x0582, 0x000c, 1, "%s Part B", 64), 1617 EXTERNAL_PORT(0x0582, 0x000c, 2, "%s MIDI"), 1618 /* Edirol UM-880 */ 1619 CONTROL_PORT(0x0582, 0x0014, 8, "%s Control"), 1620 /* Edirol SD-90 */ 1621 ROLAND_SYNTH_PORT(0x0582, 0x0016, 0, "%s Part A", 128), 1622 ROLAND_SYNTH_PORT(0x0582, 0x0016, 1, "%s Part B", 128), 1623 EXTERNAL_PORT(0x0582, 0x0016, 2, "%s MIDI 1"), 1624 EXTERNAL_PORT(0x0582, 0x0016, 3, "%s MIDI 2"), 1625 /* Edirol UM-550 */ 1626 CONTROL_PORT(0x0582, 0x0023, 5, "%s Control"), 1627 /* Edirol SD-20 */ 1628 ROLAND_SYNTH_PORT(0x0582, 0x0027, 0, "%s Part A", 64), 1629 ROLAND_SYNTH_PORT(0x0582, 0x0027, 1, "%s Part B", 64), 1630 EXTERNAL_PORT(0x0582, 0x0027, 2, "%s MIDI"), 1631 /* Edirol SD-80 */ 1632 ROLAND_SYNTH_PORT(0x0582, 0x0029, 0, "%s Part A", 128), 1633 ROLAND_SYNTH_PORT(0x0582, 0x0029, 1, "%s Part B", 128), 1634 EXTERNAL_PORT(0x0582, 0x0029, 2, "%s MIDI 1"), 1635 EXTERNAL_PORT(0x0582, 0x0029, 3, "%s MIDI 2"), 1636 /* Edirol UA-700 */ 1637 EXTERNAL_PORT(0x0582, 0x002b, 0, "%s MIDI"), 1638 CONTROL_PORT(0x0582, 0x002b, 1, "%s Control"), 1639 /* Roland VariOS */ 1640 EXTERNAL_PORT(0x0582, 0x002f, 0, "%s MIDI"), 1641 EXTERNAL_PORT(0x0582, 0x002f, 1, "%s External MIDI"), 1642 EXTERNAL_PORT(0x0582, 0x002f, 2, "%s Sync"), 1643 /* Edirol PCR */ 1644 EXTERNAL_PORT(0x0582, 0x0033, 0, "%s MIDI"), 1645 EXTERNAL_PORT(0x0582, 0x0033, 1, "%s 1"), 1646 EXTERNAL_PORT(0x0582, 0x0033, 2, "%s 2"), 1647 /* BOSS GS-10 */ 1648 EXTERNAL_PORT(0x0582, 0x003b, 0, "%s MIDI"), 1649 CONTROL_PORT(0x0582, 0x003b, 1, "%s Control"), 1650 /* Edirol UA-1000 */ 1651 EXTERNAL_PORT(0x0582, 0x0044, 0, "%s MIDI"), 1652 CONTROL_PORT(0x0582, 0x0044, 1, "%s Control"), 1653 /* Edirol UR-80 */ 1654 EXTERNAL_PORT(0x0582, 0x0048, 0, "%s MIDI"), 1655 EXTERNAL_PORT(0x0582, 0x0048, 1, "%s 1"), 1656 EXTERNAL_PORT(0x0582, 0x0048, 2, "%s 2"), 1657 /* Edirol PCR-A */ 1658 EXTERNAL_PORT(0x0582, 0x004d, 0, "%s MIDI"), 1659 EXTERNAL_PORT(0x0582, 0x004d, 1, "%s 1"), 1660 EXTERNAL_PORT(0x0582, 0x004d, 2, "%s 2"), 1661 /* BOSS GT-PRO */ 1662 CONTROL_PORT(0x0582, 0x0089, 0, "%s Control"), 1663 /* Edirol UM-3EX */ 1664 CONTROL_PORT(0x0582, 0x009a, 3, "%s Control"), 1665 /* Roland VG-99 */ 1666 CONTROL_PORT(0x0582, 0x00b2, 0, "%s Control"), 1667 EXTERNAL_PORT(0x0582, 0x00b2, 1, "%s MIDI"), 1668 /* Cakewalk Sonar V-Studio 100 */ 1669 EXTERNAL_PORT(0x0582, 0x00eb, 0, "%s MIDI"), 1670 CONTROL_PORT(0x0582, 0x00eb, 1, "%s Control"), 1671 /* Roland VB-99 */ 1672 CONTROL_PORT(0x0582, 0x0102, 0, "%s Control"), 1673 EXTERNAL_PORT(0x0582, 0x0102, 1, "%s MIDI"), 1674 /* Roland A-PRO */ 1675 EXTERNAL_PORT(0x0582, 0x010f, 0, "%s MIDI"), 1676 CONTROL_PORT(0x0582, 0x010f, 1, "%s 1"), 1677 CONTROL_PORT(0x0582, 0x010f, 2, "%s 2"), 1678 /* Roland SD-50 */ 1679 ROLAND_SYNTH_PORT(0x0582, 0x0114, 0, "%s Synth", 128), 1680 EXTERNAL_PORT(0x0582, 0x0114, 1, "%s MIDI"), 1681 CONTROL_PORT(0x0582, 0x0114, 2, "%s Control"), 1682 /* Roland OCTA-CAPTURE */ 1683 EXTERNAL_PORT(0x0582, 0x0120, 0, "%s MIDI"), 1684 CONTROL_PORT(0x0582, 0x0120, 1, "%s Control"), 1685 EXTERNAL_PORT(0x0582, 0x0121, 0, "%s MIDI"), 1686 CONTROL_PORT(0x0582, 0x0121, 1, "%s Control"), 1687 /* Roland SPD-SX */ 1688 CONTROL_PORT(0x0582, 0x0145, 0, "%s Control"), 1689 EXTERNAL_PORT(0x0582, 0x0145, 1, "%s MIDI"), 1690 /* Roland A-Series */ 1691 CONTROL_PORT(0x0582, 0x0156, 0, "%s Keyboard"), 1692 EXTERNAL_PORT(0x0582, 0x0156, 1, "%s MIDI"), 1693 /* Roland INTEGRA-7 */ 1694 ROLAND_SYNTH_PORT(0x0582, 0x015b, 0, "%s Synth", 128), 1695 CONTROL_PORT(0x0582, 0x015b, 1, "%s Control"), 1696 /* M-Audio MidiSport 8x8 */ 1697 CONTROL_PORT(0x0763, 0x1031, 8, "%s Control"), 1698 CONTROL_PORT(0x0763, 0x1033, 8, "%s Control"), 1699 /* MOTU Fastlane */ 1700 EXTERNAL_PORT(0x07fd, 0x0001, 0, "%s MIDI A"), 1701 EXTERNAL_PORT(0x07fd, 0x0001, 1, "%s MIDI B"), 1702 /* Emagic Unitor8/AMT8/MT4 */ 1703 EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"), 1704 EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"), 1705 EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"), 1706 /* Akai MPD16 */ 1707 CONTROL_PORT(0x09e8, 0x0062, 0, "%s Control"), 1708 PORT_INFO(0x09e8, 0x0062, 1, "%s MIDI", 0, 1709 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | 1710 SNDRV_SEQ_PORT_TYPE_HARDWARE), 1711 /* Access Music Virus TI */ 1712 EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"), 1713 PORT_INFO(0x133e, 0x0815, 1, "%s Synth", 0, 1714 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | 1715 SNDRV_SEQ_PORT_TYPE_HARDWARE | 1716 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER), 1717}; 1718 1719static struct port_info *find_port_info(struct snd_usb_midi *umidi, int number) 1720{ 1721 int i; 1722 1723 for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) { 1724 if (snd_usbmidi_port_info[i].id == umidi->usb_id && 1725 snd_usbmidi_port_info[i].port == number) 1726 return &snd_usbmidi_port_info[i]; 1727 } 1728 return NULL; 1729} 1730 1731static void snd_usbmidi_get_port_info(struct snd_rawmidi *rmidi, int number, 1732 struct snd_seq_port_info *seq_port_info) 1733{ 1734 struct snd_usb_midi *umidi = rmidi->private_data; 1735 struct port_info *port_info; 1736 1737 /* TODO: read port flags from descriptors */ 1738 port_info = find_port_info(umidi, number); 1739 if (port_info) { 1740 seq_port_info->type = port_info->seq_flags; 1741 seq_port_info->midi_voices = port_info->voices; 1742 } 1743} 1744 1745/* return iJack for the corresponding jackID */ 1746static int find_usb_ijack(struct usb_host_interface *hostif, uint8_t jack_id) 1747{ 1748 unsigned char *extra = hostif->extra; 1749 int extralen = hostif->extralen; 1750 struct usb_descriptor_header *h; 1751 struct usb_midi_out_jack_descriptor *outjd; 1752 struct usb_midi_in_jack_descriptor *injd; 1753 size_t sz; 1754 1755 while (extralen > 4) { 1756 h = (struct usb_descriptor_header *)extra; 1757 if (h->bDescriptorType != USB_DT_CS_INTERFACE) 1758 goto next; 1759 1760 outjd = (struct usb_midi_out_jack_descriptor *)h; 1761 if (h->bLength >= sizeof(*outjd) && 1762 outjd->bDescriptorSubtype == UAC_MIDI_OUT_JACK && 1763 outjd->bJackID == jack_id) { 1764 sz = USB_DT_MIDI_OUT_SIZE(outjd->bNrInputPins); 1765 if (outjd->bLength < sz) 1766 goto next; 1767 return *(extra + sz - 1); 1768 } 1769 1770 injd = (struct usb_midi_in_jack_descriptor *)h; 1771 if (injd->bLength >= sizeof(*injd) && 1772 injd->bDescriptorSubtype == UAC_MIDI_IN_JACK && 1773 injd->bJackID == jack_id) 1774 return injd->iJack; 1775 1776next: 1777 if (!extra[0]) 1778 break; 1779 extralen -= extra[0]; 1780 extra += extra[0]; 1781 } 1782 return 0; 1783} 1784 1785static void snd_usbmidi_init_substream(struct snd_usb_midi *umidi, 1786 int stream, int number, int jack_id, 1787 struct snd_rawmidi_substream **rsubstream) 1788{ 1789 struct port_info *port_info; 1790 const char *name_format; 1791 struct usb_interface *intf; 1792 struct usb_host_interface *hostif; 1793 uint8_t jack_name_buf[32]; 1794 uint8_t *default_jack_name = "MIDI"; 1795 uint8_t *jack_name = default_jack_name; 1796 uint8_t iJack; 1797 int res; 1798 1799 struct snd_rawmidi_substream *substream = 1800 snd_usbmidi_find_substream(umidi, stream, number); 1801 if (!substream) { 1802 dev_err(&umidi->dev->dev, "substream %d:%d not found\n", stream, 1803 number); 1804 return; 1805 } 1806 1807 intf = umidi->iface; 1808 if (intf && jack_id >= 0) { 1809 hostif = intf->cur_altsetting; 1810 iJack = find_usb_ijack(hostif, jack_id); 1811 if (iJack != 0) { 1812 res = usb_string(umidi->dev, iJack, jack_name_buf, 1813 ARRAY_SIZE(jack_name_buf)); 1814 if (res) 1815 jack_name = jack_name_buf; 1816 } 1817 } 1818 1819 port_info = find_port_info(umidi, number); 1820 name_format = port_info ? port_info->name : 1821 (jack_name != default_jack_name ? "%s %s" : "%s %s %d"); 1822 snprintf(substream->name, sizeof(substream->name), 1823 name_format, umidi->card->shortname, jack_name, number + 1); 1824 1825 *rsubstream = substream; 1826} 1827 1828/* 1829 * Creates the endpoints and their ports. 1830 */ 1831static int snd_usbmidi_create_endpoints(struct snd_usb_midi *umidi, 1832 struct snd_usb_midi_endpoint_info *endpoints) 1833{ 1834 int i, j, err; 1835 int out_ports = 0, in_ports = 0; 1836 1837 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 1838 if (endpoints[i].out_cables) { 1839 err = snd_usbmidi_out_endpoint_create(umidi, 1840 &endpoints[i], 1841 &umidi->endpoints[i]); 1842 if (err < 0) 1843 return err; 1844 } 1845 if (endpoints[i].in_cables) { 1846 err = snd_usbmidi_in_endpoint_create(umidi, 1847 &endpoints[i], 1848 &umidi->endpoints[i]); 1849 if (err < 0) 1850 return err; 1851 } 1852 1853 for (j = 0; j < 0x10; ++j) { 1854 if (endpoints[i].out_cables & (1 << j)) { 1855 snd_usbmidi_init_substream(umidi, 1856 SNDRV_RAWMIDI_STREAM_OUTPUT, 1857 out_ports, 1858 endpoints[i].assoc_out_jacks[j], 1859 &umidi->endpoints[i].out->ports[j].substream); 1860 ++out_ports; 1861 } 1862 if (endpoints[i].in_cables & (1 << j)) { 1863 snd_usbmidi_init_substream(umidi, 1864 SNDRV_RAWMIDI_STREAM_INPUT, 1865 in_ports, 1866 endpoints[i].assoc_in_jacks[j], 1867 &umidi->endpoints[i].in->ports[j].substream); 1868 ++in_ports; 1869 } 1870 } 1871 } 1872 dev_dbg(&umidi->dev->dev, "created %d output and %d input ports\n", 1873 out_ports, in_ports); 1874 return 0; 1875} 1876 1877static struct usb_ms_endpoint_descriptor *find_usb_ms_endpoint_descriptor( 1878 struct usb_host_endpoint *hostep) 1879{ 1880 unsigned char *extra = hostep->extra; 1881 int extralen = hostep->extralen; 1882 1883 while (extralen > 3) { 1884 struct usb_ms_endpoint_descriptor *ms_ep = 1885 (struct usb_ms_endpoint_descriptor *)extra; 1886 1887 if (ms_ep->bLength > 3 && 1888 ms_ep->bDescriptorType == USB_DT_CS_ENDPOINT && 1889 ms_ep->bDescriptorSubtype == UAC_MS_GENERAL) 1890 return ms_ep; 1891 if (!extra[0]) 1892 break; 1893 extralen -= extra[0]; 1894 extra += extra[0]; 1895 } 1896 return NULL; 1897} 1898 1899/* 1900 * Returns MIDIStreaming device capabilities. 1901 */ 1902static int snd_usbmidi_get_ms_info(struct snd_usb_midi *umidi, 1903 struct snd_usb_midi_endpoint_info *endpoints) 1904{ 1905 struct usb_interface *intf; 1906 struct usb_host_interface *hostif; 1907 struct usb_interface_descriptor *intfd; 1908 struct usb_ms_header_descriptor *ms_header; 1909 struct usb_host_endpoint *hostep; 1910 struct usb_endpoint_descriptor *ep; 1911 struct usb_ms_endpoint_descriptor *ms_ep; 1912 int i, j, epidx; 1913 1914 intf = umidi->iface; 1915 if (!intf) 1916 return -ENXIO; 1917 hostif = &intf->altsetting[0]; 1918 intfd = get_iface_desc(hostif); 1919 ms_header = (struct usb_ms_header_descriptor *)hostif->extra; 1920 if (hostif->extralen >= 7 && 1921 ms_header->bLength >= 7 && 1922 ms_header->bDescriptorType == USB_DT_CS_INTERFACE && 1923 ms_header->bDescriptorSubtype == UAC_HEADER) 1924 dev_dbg(&umidi->dev->dev, "MIDIStreaming version %02x.%02x\n", 1925 ((uint8_t *)&ms_header->bcdMSC)[1], ((uint8_t *)&ms_header->bcdMSC)[0]); 1926 else 1927 dev_warn(&umidi->dev->dev, 1928 "MIDIStreaming interface descriptor not found\n"); 1929 1930 epidx = 0; 1931 for (i = 0; i < intfd->bNumEndpoints; ++i) { 1932 hostep = &hostif->endpoint[i]; 1933 ep = get_ep_desc(hostep); 1934 if (!usb_endpoint_xfer_bulk(ep) && !usb_endpoint_xfer_int(ep)) 1935 continue; 1936 ms_ep = find_usb_ms_endpoint_descriptor(hostep); 1937 if (!ms_ep) 1938 continue; 1939 if (ms_ep->bLength <= sizeof(*ms_ep)) 1940 continue; 1941 if (ms_ep->bNumEmbMIDIJack > 0x10) 1942 continue; 1943 if (ms_ep->bLength < sizeof(*ms_ep) + ms_ep->bNumEmbMIDIJack) 1944 continue; 1945 if (usb_endpoint_dir_out(ep)) { 1946 if (endpoints[epidx].out_ep) { 1947 if (++epidx >= MIDI_MAX_ENDPOINTS) { 1948 dev_warn(&umidi->dev->dev, 1949 "too many endpoints\n"); 1950 break; 1951 } 1952 } 1953 endpoints[epidx].out_ep = usb_endpoint_num(ep); 1954 if (usb_endpoint_xfer_int(ep)) 1955 endpoints[epidx].out_interval = ep->bInterval; 1956 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW) 1957 /* 1958 * Low speed bulk transfers don't exist, so 1959 * force interrupt transfers for devices like 1960 * ESI MIDI Mate that try to use them anyway. 1961 */ 1962 endpoints[epidx].out_interval = 1; 1963 endpoints[epidx].out_cables = 1964 (1 << ms_ep->bNumEmbMIDIJack) - 1; 1965 for (j = 0; j < ms_ep->bNumEmbMIDIJack; ++j) 1966 endpoints[epidx].assoc_out_jacks[j] = ms_ep->baAssocJackID[j]; 1967 for (; j < ARRAY_SIZE(endpoints[epidx].assoc_out_jacks); ++j) 1968 endpoints[epidx].assoc_out_jacks[j] = -1; 1969 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n", 1970 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack); 1971 } else { 1972 if (endpoints[epidx].in_ep) { 1973 if (++epidx >= MIDI_MAX_ENDPOINTS) { 1974 dev_warn(&umidi->dev->dev, 1975 "too many endpoints\n"); 1976 break; 1977 } 1978 } 1979 endpoints[epidx].in_ep = usb_endpoint_num(ep); 1980 if (usb_endpoint_xfer_int(ep)) 1981 endpoints[epidx].in_interval = ep->bInterval; 1982 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW) 1983 endpoints[epidx].in_interval = 1; 1984 endpoints[epidx].in_cables = 1985 (1 << ms_ep->bNumEmbMIDIJack) - 1; 1986 for (j = 0; j < ms_ep->bNumEmbMIDIJack; ++j) 1987 endpoints[epidx].assoc_in_jacks[j] = ms_ep->baAssocJackID[j]; 1988 for (; j < ARRAY_SIZE(endpoints[epidx].assoc_in_jacks); ++j) 1989 endpoints[epidx].assoc_in_jacks[j] = -1; 1990 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n", 1991 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack); 1992 } 1993 } 1994 return 0; 1995} 1996 1997static int roland_load_info(struct snd_kcontrol *kcontrol, 1998 struct snd_ctl_elem_info *info) 1999{ 2000 static const char *const names[] = { "High Load", "Light Load" }; 2001 2002 return snd_ctl_enum_info(info, 1, 2, names); 2003} 2004 2005static int roland_load_get(struct snd_kcontrol *kcontrol, 2006 struct snd_ctl_elem_value *value) 2007{ 2008 value->value.enumerated.item[0] = kcontrol->private_value; 2009 return 0; 2010} 2011 2012static int roland_load_put(struct snd_kcontrol *kcontrol, 2013 struct snd_ctl_elem_value *value) 2014{ 2015 struct snd_usb_midi *umidi = kcontrol->private_data; 2016 int changed; 2017 2018 if (value->value.enumerated.item[0] > 1) 2019 return -EINVAL; 2020 mutex_lock(&umidi->mutex); 2021 changed = value->value.enumerated.item[0] != kcontrol->private_value; 2022 if (changed) 2023 kcontrol->private_value = value->value.enumerated.item[0]; 2024 mutex_unlock(&umidi->mutex); 2025 return changed; 2026} 2027 2028static const struct snd_kcontrol_new roland_load_ctl = { 2029 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 2030 .name = "MIDI Input Mode", 2031 .info = roland_load_info, 2032 .get = roland_load_get, 2033 .put = roland_load_put, 2034 .private_value = 1, 2035}; 2036 2037/* 2038 * On Roland devices, use the second alternate setting to be able to use 2039 * the interrupt input endpoint. 2040 */ 2041static void snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi *umidi) 2042{ 2043 struct usb_interface *intf; 2044 struct usb_host_interface *hostif; 2045 struct usb_interface_descriptor *intfd; 2046 2047 intf = umidi->iface; 2048 if (!intf || intf->num_altsetting != 2) 2049 return; 2050 2051 hostif = &intf->altsetting[1]; 2052 intfd = get_iface_desc(hostif); 2053 /* If either or both of the endpoints support interrupt transfer, 2054 * then use the alternate setting 2055 */ 2056 if (intfd->bNumEndpoints != 2 || 2057 !((get_endpoint(hostif, 0)->bmAttributes & 2058 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT || 2059 (get_endpoint(hostif, 1)->bmAttributes & 2060 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)) 2061 return; 2062 2063 dev_dbg(&umidi->dev->dev, "switching to altsetting %d with int ep\n", 2064 intfd->bAlternateSetting); 2065 usb_set_interface(umidi->dev, intfd->bInterfaceNumber, 2066 intfd->bAlternateSetting); 2067 2068 umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi); 2069 if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0) 2070 umidi->roland_load_ctl = NULL; 2071} 2072 2073/* 2074 * Try to find any usable endpoints in the interface. 2075 */ 2076static int snd_usbmidi_detect_endpoints(struct snd_usb_midi *umidi, 2077 struct snd_usb_midi_endpoint_info *endpoint, 2078 int max_endpoints) 2079{ 2080 struct usb_interface *intf; 2081 struct usb_host_interface *hostif; 2082 struct usb_interface_descriptor *intfd; 2083 struct usb_endpoint_descriptor *epd; 2084 int i, out_eps = 0, in_eps = 0; 2085 2086 if (USB_ID_VENDOR(umidi->usb_id) == 0x0582) 2087 snd_usbmidi_switch_roland_altsetting(umidi); 2088 2089 if (endpoint[0].out_ep || endpoint[0].in_ep) 2090 return 0; 2091 2092 intf = umidi->iface; 2093 if (!intf || intf->num_altsetting < 1) 2094 return -ENOENT; 2095 hostif = intf->cur_altsetting; 2096 intfd = get_iface_desc(hostif); 2097 2098 for (i = 0; i < intfd->bNumEndpoints; ++i) { 2099 epd = get_endpoint(hostif, i); 2100 if (!usb_endpoint_xfer_bulk(epd) && 2101 !usb_endpoint_xfer_int(epd)) 2102 continue; 2103 if (out_eps < max_endpoints && 2104 usb_endpoint_dir_out(epd)) { 2105 endpoint[out_eps].out_ep = usb_endpoint_num(epd); 2106 if (usb_endpoint_xfer_int(epd)) 2107 endpoint[out_eps].out_interval = epd->bInterval; 2108 ++out_eps; 2109 } 2110 if (in_eps < max_endpoints && 2111 usb_endpoint_dir_in(epd)) { 2112 endpoint[in_eps].in_ep = usb_endpoint_num(epd); 2113 if (usb_endpoint_xfer_int(epd)) 2114 endpoint[in_eps].in_interval = epd->bInterval; 2115 ++in_eps; 2116 } 2117 } 2118 return (out_eps || in_eps) ? 0 : -ENOENT; 2119} 2120 2121/* 2122 * Detects the endpoints for one-port-per-endpoint protocols. 2123 */ 2124static int snd_usbmidi_detect_per_port_endpoints(struct snd_usb_midi *umidi, 2125 struct snd_usb_midi_endpoint_info *endpoints) 2126{ 2127 int err, i; 2128 2129 err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS); 2130 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 2131 if (endpoints[i].out_ep) 2132 endpoints[i].out_cables = 0x0001; 2133 if (endpoints[i].in_ep) 2134 endpoints[i].in_cables = 0x0001; 2135 } 2136 return err; 2137} 2138 2139/* 2140 * Detects the endpoints and ports of Yamaha devices. 2141 */ 2142static int snd_usbmidi_detect_yamaha(struct snd_usb_midi *umidi, 2143 struct snd_usb_midi_endpoint_info *endpoint) 2144{ 2145 struct usb_interface *intf; 2146 struct usb_host_interface *hostif; 2147 struct usb_interface_descriptor *intfd; 2148 uint8_t *cs_desc; 2149 2150 intf = umidi->iface; 2151 if (!intf) 2152 return -ENOENT; 2153 hostif = intf->altsetting; 2154 intfd = get_iface_desc(hostif); 2155 if (intfd->bNumEndpoints < 1) 2156 return -ENOENT; 2157 2158 /* 2159 * For each port there is one MIDI_IN/OUT_JACK descriptor, not 2160 * necessarily with any useful contents. So simply count 'em. 2161 */ 2162 for (cs_desc = hostif->extra; 2163 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2; 2164 cs_desc += cs_desc[0]) { 2165 if (cs_desc[1] == USB_DT_CS_INTERFACE) { 2166 if (cs_desc[2] == UAC_MIDI_IN_JACK) 2167 endpoint->in_cables = 2168 (endpoint->in_cables << 1) | 1; 2169 else if (cs_desc[2] == UAC_MIDI_OUT_JACK) 2170 endpoint->out_cables = 2171 (endpoint->out_cables << 1) | 1; 2172 } 2173 } 2174 if (!endpoint->in_cables && !endpoint->out_cables) 2175 return -ENOENT; 2176 2177 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1); 2178} 2179 2180/* 2181 * Detects the endpoints and ports of Roland devices. 2182 */ 2183static int snd_usbmidi_detect_roland(struct snd_usb_midi *umidi, 2184 struct snd_usb_midi_endpoint_info *endpoint) 2185{ 2186 struct usb_interface *intf; 2187 struct usb_host_interface *hostif; 2188 u8 *cs_desc; 2189 2190 intf = umidi->iface; 2191 if (!intf) 2192 return -ENOENT; 2193 hostif = intf->altsetting; 2194 /* 2195 * Some devices have a descriptor <06 24 F1 02 <inputs> <outputs>>, 2196 * some have standard class descriptors, or both kinds, or neither. 2197 */ 2198 for (cs_desc = hostif->extra; 2199 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2; 2200 cs_desc += cs_desc[0]) { 2201 if (cs_desc[0] >= 6 && 2202 cs_desc[1] == USB_DT_CS_INTERFACE && 2203 cs_desc[2] == 0xf1 && 2204 cs_desc[3] == 0x02) { 2205 if (cs_desc[4] > 0x10 || cs_desc[5] > 0x10) 2206 continue; 2207 endpoint->in_cables = (1 << cs_desc[4]) - 1; 2208 endpoint->out_cables = (1 << cs_desc[5]) - 1; 2209 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1); 2210 } else if (cs_desc[0] >= 7 && 2211 cs_desc[1] == USB_DT_CS_INTERFACE && 2212 cs_desc[2] == UAC_HEADER) { 2213 return snd_usbmidi_get_ms_info(umidi, endpoint); 2214 } 2215 } 2216 2217 return -ENODEV; 2218} 2219 2220/* 2221 * Creates the endpoints and their ports for Midiman devices. 2222 */ 2223static int snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi *umidi, 2224 struct snd_usb_midi_endpoint_info *endpoint) 2225{ 2226 struct snd_usb_midi_endpoint_info ep_info; 2227 struct usb_interface *intf; 2228 struct usb_host_interface *hostif; 2229 struct usb_interface_descriptor *intfd; 2230 struct usb_endpoint_descriptor *epd; 2231 int cable, err; 2232 2233 intf = umidi->iface; 2234 if (!intf) 2235 return -ENOENT; 2236 hostif = intf->altsetting; 2237 intfd = get_iface_desc(hostif); 2238 /* 2239 * The various MidiSport devices have more or less random endpoint 2240 * numbers, so we have to identify the endpoints by their index in 2241 * the descriptor array, like the driver for that other OS does. 2242 * 2243 * There is one interrupt input endpoint for all input ports, one 2244 * bulk output endpoint for even-numbered ports, and one for odd- 2245 * numbered ports. Both bulk output endpoints have corresponding 2246 * input bulk endpoints (at indices 1 and 3) which aren't used. 2247 */ 2248 if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) { 2249 dev_dbg(&umidi->dev->dev, "not enough endpoints\n"); 2250 return -ENOENT; 2251 } 2252 2253 epd = get_endpoint(hostif, 0); 2254 if (!usb_endpoint_dir_in(epd) || !usb_endpoint_xfer_int(epd)) { 2255 dev_dbg(&umidi->dev->dev, "endpoint[0] isn't interrupt\n"); 2256 return -ENXIO; 2257 } 2258 epd = get_endpoint(hostif, 2); 2259 if (!usb_endpoint_dir_out(epd) || !usb_endpoint_xfer_bulk(epd)) { 2260 dev_dbg(&umidi->dev->dev, "endpoint[2] isn't bulk output\n"); 2261 return -ENXIO; 2262 } 2263 if (endpoint->out_cables > 0x0001) { 2264 epd = get_endpoint(hostif, 4); 2265 if (!usb_endpoint_dir_out(epd) || 2266 !usb_endpoint_xfer_bulk(epd)) { 2267 dev_dbg(&umidi->dev->dev, 2268 "endpoint[4] isn't bulk output\n"); 2269 return -ENXIO; 2270 } 2271 } 2272 2273 ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress & 2274 USB_ENDPOINT_NUMBER_MASK; 2275 ep_info.out_interval = 0; 2276 ep_info.out_cables = endpoint->out_cables & 0x5555; 2277 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, 2278 &umidi->endpoints[0]); 2279 if (err < 0) 2280 return err; 2281 2282 ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress & 2283 USB_ENDPOINT_NUMBER_MASK; 2284 ep_info.in_interval = get_endpoint(hostif, 0)->bInterval; 2285 ep_info.in_cables = endpoint->in_cables; 2286 err = snd_usbmidi_in_endpoint_create(umidi, &ep_info, 2287 &umidi->endpoints[0]); 2288 if (err < 0) 2289 return err; 2290 2291 if (endpoint->out_cables > 0x0001) { 2292 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress & 2293 USB_ENDPOINT_NUMBER_MASK; 2294 ep_info.out_cables = endpoint->out_cables & 0xaaaa; 2295 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, 2296 &umidi->endpoints[1]); 2297 if (err < 0) 2298 return err; 2299 } 2300 2301 for (cable = 0; cable < 0x10; ++cable) { 2302 if (endpoint->out_cables & (1 << cable)) 2303 snd_usbmidi_init_substream(umidi, 2304 SNDRV_RAWMIDI_STREAM_OUTPUT, 2305 cable, 2306 -1 /* prevent trying to find jack */, 2307 &umidi->endpoints[cable & 1].out->ports[cable].substream); 2308 if (endpoint->in_cables & (1 << cable)) 2309 snd_usbmidi_init_substream(umidi, 2310 SNDRV_RAWMIDI_STREAM_INPUT, 2311 cable, 2312 -1 /* prevent trying to find jack */, 2313 &umidi->endpoints[0].in->ports[cable].substream); 2314 } 2315 return 0; 2316} 2317 2318static const struct snd_rawmidi_global_ops snd_usbmidi_ops = { 2319 .get_port_info = snd_usbmidi_get_port_info, 2320}; 2321 2322static int snd_usbmidi_create_rawmidi(struct snd_usb_midi *umidi, 2323 int out_ports, int in_ports) 2324{ 2325 struct snd_rawmidi *rmidi; 2326 int err; 2327 2328 err = snd_rawmidi_new(umidi->card, "USB MIDI", 2329 umidi->next_midi_device++, 2330 out_ports, in_ports, &rmidi); 2331 if (err < 0) 2332 return err; 2333 strcpy(rmidi->name, umidi->card->shortname); 2334 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | 2335 SNDRV_RAWMIDI_INFO_INPUT | 2336 SNDRV_RAWMIDI_INFO_DUPLEX; 2337 rmidi->ops = &snd_usbmidi_ops; 2338 rmidi->private_data = umidi; 2339 rmidi->private_free = snd_usbmidi_rawmidi_free; 2340 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 2341 &snd_usbmidi_output_ops); 2342 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 2343 &snd_usbmidi_input_ops); 2344 2345 umidi->rmidi = rmidi; 2346 return 0; 2347} 2348 2349/* 2350 * Temporarily stop input. 2351 */ 2352void snd_usbmidi_input_stop(struct list_head *p) 2353{ 2354 struct snd_usb_midi *umidi; 2355 unsigned int i, j; 2356 2357 umidi = list_entry(p, struct snd_usb_midi, list); 2358 if (!umidi->input_running) 2359 return; 2360 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 2361 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i]; 2362 if (ep->in) 2363 for (j = 0; j < INPUT_URBS; ++j) 2364 usb_kill_urb(ep->in->urbs[j]); 2365 } 2366 umidi->input_running = 0; 2367} 2368EXPORT_SYMBOL(snd_usbmidi_input_stop); 2369 2370static void snd_usbmidi_input_start_ep(struct snd_usb_midi *umidi, 2371 struct snd_usb_midi_in_endpoint *ep) 2372{ 2373 unsigned int i; 2374 unsigned long flags; 2375 2376 if (!ep) 2377 return; 2378 for (i = 0; i < INPUT_URBS; ++i) { 2379 struct urb *urb = ep->urbs[i]; 2380 spin_lock_irqsave(&umidi->disc_lock, flags); 2381 if (!atomic_read(&urb->use_count)) { 2382 urb->dev = ep->umidi->dev; 2383 snd_usbmidi_submit_urb(urb, GFP_ATOMIC); 2384 } 2385 spin_unlock_irqrestore(&umidi->disc_lock, flags); 2386 } 2387} 2388 2389/* 2390 * Resume input after a call to snd_usbmidi_input_stop(). 2391 */ 2392void snd_usbmidi_input_start(struct list_head *p) 2393{ 2394 struct snd_usb_midi *umidi; 2395 int i; 2396 2397 umidi = list_entry(p, struct snd_usb_midi, list); 2398 if (umidi->input_running || !umidi->opened[1]) 2399 return; 2400 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) 2401 snd_usbmidi_input_start_ep(umidi, umidi->endpoints[i].in); 2402 umidi->input_running = 1; 2403} 2404EXPORT_SYMBOL(snd_usbmidi_input_start); 2405 2406/* 2407 * Prepare for suspend. Typically called from the USB suspend callback. 2408 */ 2409void snd_usbmidi_suspend(struct list_head *p) 2410{ 2411 struct snd_usb_midi *umidi; 2412 2413 umidi = list_entry(p, struct snd_usb_midi, list); 2414 mutex_lock(&umidi->mutex); 2415 snd_usbmidi_input_stop(p); 2416 mutex_unlock(&umidi->mutex); 2417} 2418EXPORT_SYMBOL(snd_usbmidi_suspend); 2419 2420/* 2421 * Resume. Typically called from the USB resume callback. 2422 */ 2423void snd_usbmidi_resume(struct list_head *p) 2424{ 2425 struct snd_usb_midi *umidi; 2426 2427 umidi = list_entry(p, struct snd_usb_midi, list); 2428 mutex_lock(&umidi->mutex); 2429 snd_usbmidi_input_start(p); 2430 mutex_unlock(&umidi->mutex); 2431} 2432EXPORT_SYMBOL(snd_usbmidi_resume); 2433 2434/* 2435 * Creates and registers everything needed for a MIDI streaming interface. 2436 */ 2437int __snd_usbmidi_create(struct snd_card *card, 2438 struct usb_interface *iface, 2439 struct list_head *midi_list, 2440 const struct snd_usb_audio_quirk *quirk, 2441 unsigned int usb_id, 2442 unsigned int *num_rawmidis) 2443{ 2444 struct snd_usb_midi *umidi; 2445 struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS]; 2446 int out_ports, in_ports; 2447 int i, err; 2448 2449 umidi = kzalloc(sizeof(*umidi), GFP_KERNEL); 2450 if (!umidi) 2451 return -ENOMEM; 2452 umidi->dev = interface_to_usbdev(iface); 2453 umidi->card = card; 2454 umidi->iface = iface; 2455 umidi->quirk = quirk; 2456 umidi->usb_protocol_ops = &snd_usbmidi_standard_ops; 2457 if (num_rawmidis) 2458 umidi->next_midi_device = *num_rawmidis; 2459 spin_lock_init(&umidi->disc_lock); 2460 init_rwsem(&umidi->disc_rwsem); 2461 mutex_init(&umidi->mutex); 2462 if (!usb_id) 2463 usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor), 2464 le16_to_cpu(umidi->dev->descriptor.idProduct)); 2465 umidi->usb_id = usb_id; 2466 timer_setup(&umidi->error_timer, snd_usbmidi_error_timer, 0); 2467 2468 /* detect the endpoint(s) to use */ 2469 memset(endpoints, 0, sizeof(endpoints)); 2470 switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) { 2471 case QUIRK_MIDI_STANDARD_INTERFACE: 2472 err = snd_usbmidi_get_ms_info(umidi, endpoints); 2473 if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */ 2474 umidi->usb_protocol_ops = 2475 &snd_usbmidi_maudio_broken_running_status_ops; 2476 break; 2477 case QUIRK_MIDI_US122L: 2478 umidi->usb_protocol_ops = &snd_usbmidi_122l_ops; 2479 fallthrough; 2480 case QUIRK_MIDI_FIXED_ENDPOINT: 2481 memcpy(&endpoints[0], quirk->data, 2482 sizeof(struct snd_usb_midi_endpoint_info)); 2483 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1); 2484 break; 2485 case QUIRK_MIDI_YAMAHA: 2486 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]); 2487 break; 2488 case QUIRK_MIDI_ROLAND: 2489 err = snd_usbmidi_detect_roland(umidi, &endpoints[0]); 2490 break; 2491 case QUIRK_MIDI_MIDIMAN: 2492 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops; 2493 memcpy(&endpoints[0], quirk->data, 2494 sizeof(struct snd_usb_midi_endpoint_info)); 2495 err = 0; 2496 break; 2497 case QUIRK_MIDI_NOVATION: 2498 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops; 2499 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2500 break; 2501 case QUIRK_MIDI_RAW_BYTES: 2502 umidi->usb_protocol_ops = &snd_usbmidi_raw_ops; 2503 /* 2504 * Interface 1 contains isochronous endpoints, but with the same 2505 * numbers as in interface 0. Since it is interface 1 that the 2506 * USB core has most recently seen, these descriptors are now 2507 * associated with the endpoint numbers. This will foul up our 2508 * attempts to submit bulk/interrupt URBs to the endpoints in 2509 * interface 0, so we have to make sure that the USB core looks 2510 * again at interface 0 by calling usb_set_interface() on it. 2511 */ 2512 if (umidi->usb_id == USB_ID(0x07fd, 0x0001)) /* MOTU Fastlane */ 2513 usb_set_interface(umidi->dev, 0, 0); 2514 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2515 break; 2516 case QUIRK_MIDI_EMAGIC: 2517 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops; 2518 memcpy(&endpoints[0], quirk->data, 2519 sizeof(struct snd_usb_midi_endpoint_info)); 2520 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1); 2521 break; 2522 case QUIRK_MIDI_CME: 2523 umidi->usb_protocol_ops = &snd_usbmidi_cme_ops; 2524 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2525 break; 2526 case QUIRK_MIDI_AKAI: 2527 umidi->usb_protocol_ops = &snd_usbmidi_akai_ops; 2528 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2529 /* endpoint 1 is input-only */ 2530 endpoints[1].out_cables = 0; 2531 break; 2532 case QUIRK_MIDI_FTDI: 2533 umidi->usb_protocol_ops = &snd_usbmidi_ftdi_ops; 2534 2535 /* set baud rate to 31250 (48 MHz / 16 / 96) */ 2536 err = usb_control_msg(umidi->dev, usb_sndctrlpipe(umidi->dev, 0), 2537 3, 0x40, 0x60, 0, NULL, 0, 1000); 2538 if (err < 0) 2539 break; 2540 2541 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2542 break; 2543 case QUIRK_MIDI_CH345: 2544 umidi->usb_protocol_ops = &snd_usbmidi_ch345_broken_sysex_ops; 2545 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2546 break; 2547 default: 2548 dev_err(&umidi->dev->dev, "invalid quirk type %d\n", 2549 quirk->type); 2550 err = -ENXIO; 2551 break; 2552 } 2553 if (err < 0) 2554 goto free_midi; 2555 2556 /* create rawmidi device */ 2557 out_ports = 0; 2558 in_ports = 0; 2559 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 2560 out_ports += hweight16(endpoints[i].out_cables); 2561 in_ports += hweight16(endpoints[i].in_cables); 2562 } 2563 err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports); 2564 if (err < 0) 2565 goto free_midi; 2566 2567 /* create endpoint/port structures */ 2568 if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN) 2569 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]); 2570 else 2571 err = snd_usbmidi_create_endpoints(umidi, endpoints); 2572 if (err < 0) 2573 goto exit; 2574 2575 usb_autopm_get_interface_no_resume(umidi->iface); 2576 2577 list_add_tail(&umidi->list, midi_list); 2578 if (num_rawmidis) 2579 *num_rawmidis = umidi->next_midi_device; 2580 return 0; 2581 2582free_midi: 2583 kfree(umidi); 2584exit: 2585 return err; 2586} 2587EXPORT_SYMBOL(__snd_usbmidi_create); 2588