1 /* 2 * usbmidi.c - ALSA USB MIDI driver 3 * 4 * Copyright (c) 2002-2009 Clemens Ladisch 5 * All rights reserved. 6 * 7 * Based on the OSS usb-midi driver by NAGANO Daisuke, 8 * NetBSD's umidi driver by Takuya SHIOZAKI, 9 * the "USB Device Class Definition for MIDI Devices" by Roland 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * Alternatively, this software may be distributed and/or modified under the 21 * terms of the GNU General Public License as published by the Free Software 22 * Foundation; either version 2 of the License, or (at your option) any later 23 * version. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 29 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38 #include <linux/kernel.h> 39 #include <linux/types.h> 40 #include <linux/bitops.h> 41 #include <linux/interrupt.h> 42 #include <linux/spinlock.h> 43 #include <linux/string.h> 44 #include <linux/init.h> 45 #include <linux/slab.h> 46 #include <linux/timer.h> 47 #include <linux/usb.h> 48 #include <linux/wait.h> 49 #include <linux/usb/audio.h> 50 #include <linux/module.h> 51 52 #include <sound/core.h> 53 #include <sound/control.h> 54 #include <sound/rawmidi.h> 55 #include <sound/asequencer.h> 56 #include "usbaudio.h" 57 #include "midi.h" 58 #include "power.h" 59 #include "helper.h" 60 61 /* 62 * define this to log all USB packets 63 */ 64 /* #define DUMP_PACKETS */ 65 66 /* 67 * how long to wait after some USB errors, so that hub_wq can disconnect() us 68 * without too many spurious errors 69 */ 70 #define ERROR_DELAY_JIFFIES (HZ / 10) 71 72 #define OUTPUT_URBS 7 73 #define INPUT_URBS 7 74 75 76 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>"); 77 MODULE_DESCRIPTION("USB Audio/MIDI helper module"); 78 MODULE_LICENSE("Dual BSD/GPL"); 79 80 81 struct usb_ms_header_descriptor { 82 __u8 bLength; 83 __u8 bDescriptorType; 84 __u8 bDescriptorSubtype; 85 __u8 bcdMSC[2]; 86 __le16 wTotalLength; 87 } __attribute__ ((packed)); 88 89 struct usb_ms_endpoint_descriptor { 90 __u8 bLength; 91 __u8 bDescriptorType; 92 __u8 bDescriptorSubtype; 93 __u8 bNumEmbMIDIJack; 94 __u8 baAssocJackID[0]; 95 } __attribute__ ((packed)); 96 97 struct snd_usb_midi_in_endpoint; 98 struct snd_usb_midi_out_endpoint; 99 struct snd_usb_midi_endpoint; 100 101 struct usb_protocol_ops { 102 void (*input)(struct snd_usb_midi_in_endpoint*, uint8_t*, int); 103 void (*output)(struct snd_usb_midi_out_endpoint *ep, struct urb *urb); 104 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t); 105 void (*init_out_endpoint)(struct snd_usb_midi_out_endpoint *); 106 void (*finish_out_endpoint)(struct snd_usb_midi_out_endpoint *); 107 }; 108 109 struct snd_usb_midi { 110 struct usb_device *dev; 111 struct snd_card *card; 112 struct usb_interface *iface; 113 const struct snd_usb_audio_quirk *quirk; 114 struct snd_rawmidi *rmidi; 115 const struct usb_protocol_ops *usb_protocol_ops; 116 struct list_head list; 117 struct timer_list error_timer; 118 spinlock_t disc_lock; 119 struct rw_semaphore disc_rwsem; 120 struct mutex mutex; 121 u32 usb_id; 122 int next_midi_device; 123 124 struct snd_usb_midi_endpoint { 125 struct snd_usb_midi_out_endpoint *out; 126 struct snd_usb_midi_in_endpoint *in; 127 } endpoints[MIDI_MAX_ENDPOINTS]; 128 unsigned long input_triggered; 129 unsigned int opened[2]; 130 unsigned char disconnected; 131 unsigned char input_running; 132 133 struct snd_kcontrol *roland_load_ctl; 134 }; 135 136 struct snd_usb_midi_out_endpoint { 137 struct snd_usb_midi *umidi; 138 struct out_urb_context { 139 struct urb *urb; 140 struct snd_usb_midi_out_endpoint *ep; 141 } urbs[OUTPUT_URBS]; 142 unsigned int active_urbs; 143 unsigned int drain_urbs; 144 int max_transfer; /* size of urb buffer */ 145 struct tasklet_struct tasklet; 146 unsigned int next_urb; 147 spinlock_t buffer_lock; 148 149 struct usbmidi_out_port { 150 struct snd_usb_midi_out_endpoint *ep; 151 struct snd_rawmidi_substream *substream; 152 int active; 153 uint8_t cable; /* cable number << 4 */ 154 uint8_t state; 155 #define STATE_UNKNOWN 0 156 #define STATE_1PARAM 1 157 #define STATE_2PARAM_1 2 158 #define STATE_2PARAM_2 3 159 #define STATE_SYSEX_0 4 160 #define STATE_SYSEX_1 5 161 #define STATE_SYSEX_2 6 162 uint8_t data[2]; 163 } ports[0x10]; 164 int current_port; 165 166 wait_queue_head_t drain_wait; 167 }; 168 169 struct snd_usb_midi_in_endpoint { 170 struct snd_usb_midi *umidi; 171 struct urb *urbs[INPUT_URBS]; 172 struct usbmidi_in_port { 173 struct snd_rawmidi_substream *substream; 174 u8 running_status_length; 175 } ports[0x10]; 176 u8 seen_f5; 177 bool in_sysex; 178 u8 last_cin; 179 u8 error_resubmit; 180 int current_port; 181 }; 182 183 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep); 184 185 static 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 */ 192 static 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 */ 203 static 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 */ 226 static 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 241 static 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 */ 255 static 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 } 278 279 static 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 */ 309 static 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 } 345 346 static 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 */ 355 static 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 */ 383 static 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 */ 403 404 static 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 } 417 418 static 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 */ 435 static 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 */ 476 static 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 */ 509 static 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 */ 522 static 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 */ 539 static 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 */ 556 static 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 } 652 653 static 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 } 673 674 static const 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 }; 679 680 static const 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 }; 685 686 static const 687 struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = { 688 .input = snd_usbmidi_maudio_broken_running_status_input, 689 .output = snd_usbmidi_standard_output, 690 .output_packet = snd_usbmidi_output_standard_packet, 691 }; 692 693 static const struct usb_protocol_ops snd_usbmidi_cme_ops = { 694 .input = snd_usbmidi_cme_input, 695 .output = snd_usbmidi_standard_output, 696 .output_packet = snd_usbmidi_output_standard_packet, 697 }; 698 699 static const struct usb_protocol_ops snd_usbmidi_ch345_broken_sysex_ops = { 700 .input = ch345_broken_sysex_input, 701 .output = snd_usbmidi_standard_output, 702 .output_packet = snd_usbmidi_output_standard_packet, 703 }; 704 705 /* 706 * AKAI MPD16 protocol: 707 * 708 * For control port (endpoint 1): 709 * ============================== 710 * One or more chunks consisting of first byte of (0x10 | msg_len) and then a 711 * SysEx message (msg_len=9 bytes long). 712 * 713 * For data port (endpoint 2): 714 * =========================== 715 * One or more chunks consisting of first byte of (0x20 | msg_len) and then a 716 * MIDI message (msg_len bytes long) 717 * 718 * Messages sent: Active Sense, Note On, Poly Pressure, Control Change. 719 */ 720 static void snd_usbmidi_akai_input(struct snd_usb_midi_in_endpoint *ep, 721 uint8_t *buffer, int buffer_length) 722 { 723 unsigned int pos = 0; 724 unsigned int len = (unsigned int)buffer_length; 725 while (pos < len) { 726 unsigned int port = (buffer[pos] >> 4) - 1; 727 unsigned int msg_len = buffer[pos] & 0x0f; 728 pos++; 729 if (pos + msg_len <= len && port < 2) 730 snd_usbmidi_input_data(ep, 0, &buffer[pos], msg_len); 731 pos += msg_len; 732 } 733 } 734 735 #define MAX_AKAI_SYSEX_LEN 9 736 737 static void snd_usbmidi_akai_output(struct snd_usb_midi_out_endpoint *ep, 738 struct urb *urb) 739 { 740 uint8_t *msg; 741 int pos, end, count, buf_end; 742 uint8_t tmp[MAX_AKAI_SYSEX_LEN]; 743 struct snd_rawmidi_substream *substream = ep->ports[0].substream; 744 745 if (!ep->ports[0].active) 746 return; 747 748 msg = urb->transfer_buffer + urb->transfer_buffer_length; 749 buf_end = ep->max_transfer - MAX_AKAI_SYSEX_LEN - 1; 750 751 /* only try adding more data when there's space for at least 1 SysEx */ 752 while (urb->transfer_buffer_length < buf_end) { 753 count = snd_rawmidi_transmit_peek(substream, 754 tmp, MAX_AKAI_SYSEX_LEN); 755 if (!count) { 756 ep->ports[0].active = 0; 757 return; 758 } 759 /* try to skip non-SysEx data */ 760 for (pos = 0; pos < count && tmp[pos] != 0xF0; pos++) 761 ; 762 763 if (pos > 0) { 764 snd_rawmidi_transmit_ack(substream, pos); 765 continue; 766 } 767 768 /* look for the start or end marker */ 769 for (end = 1; end < count && tmp[end] < 0xF0; end++) 770 ; 771 772 /* next SysEx started before the end of current one */ 773 if (end < count && tmp[end] == 0xF0) { 774 /* it's incomplete - drop it */ 775 snd_rawmidi_transmit_ack(substream, end); 776 continue; 777 } 778 /* SysEx complete */ 779 if (end < count && tmp[end] == 0xF7) { 780 /* queue it, ack it, and get the next one */ 781 count = end + 1; 782 msg[0] = 0x10 | count; 783 memcpy(&msg[1], tmp, count); 784 snd_rawmidi_transmit_ack(substream, count); 785 urb->transfer_buffer_length += count + 1; 786 msg += count + 1; 787 continue; 788 } 789 /* less than 9 bytes and no end byte - wait for more */ 790 if (count < MAX_AKAI_SYSEX_LEN) { 791 ep->ports[0].active = 0; 792 return; 793 } 794 /* 9 bytes and no end marker in sight - malformed, skip it */ 795 snd_rawmidi_transmit_ack(substream, count); 796 } 797 } 798 799 static const struct usb_protocol_ops snd_usbmidi_akai_ops = { 800 .input = snd_usbmidi_akai_input, 801 .output = snd_usbmidi_akai_output, 802 }; 803 804 /* 805 * Novation USB MIDI protocol: number of data bytes is in the first byte 806 * (when receiving) (+1!) or in the second byte (when sending); data begins 807 * at the third byte. 808 */ 809 810 static void snd_usbmidi_novation_input(struct snd_usb_midi_in_endpoint *ep, 811 uint8_t *buffer, int buffer_length) 812 { 813 if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1) 814 return; 815 snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1); 816 } 817 818 static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint *ep, 819 struct urb *urb) 820 { 821 uint8_t *transfer_buffer; 822 int count; 823 824 if (!ep->ports[0].active) 825 return; 826 transfer_buffer = urb->transfer_buffer; 827 count = snd_rawmidi_transmit(ep->ports[0].substream, 828 &transfer_buffer[2], 829 ep->max_transfer - 2); 830 if (count < 1) { 831 ep->ports[0].active = 0; 832 return; 833 } 834 transfer_buffer[0] = 0; 835 transfer_buffer[1] = count; 836 urb->transfer_buffer_length = 2 + count; 837 } 838 839 static const struct usb_protocol_ops snd_usbmidi_novation_ops = { 840 .input = snd_usbmidi_novation_input, 841 .output = snd_usbmidi_novation_output, 842 }; 843 844 /* 845 * "raw" protocol: just move raw MIDI bytes from/to the endpoint 846 */ 847 848 static void snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint *ep, 849 uint8_t *buffer, int buffer_length) 850 { 851 snd_usbmidi_input_data(ep, 0, buffer, buffer_length); 852 } 853 854 static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint *ep, 855 struct urb *urb) 856 { 857 int count; 858 859 if (!ep->ports[0].active) 860 return; 861 count = snd_rawmidi_transmit(ep->ports[0].substream, 862 urb->transfer_buffer, 863 ep->max_transfer); 864 if (count < 1) { 865 ep->ports[0].active = 0; 866 return; 867 } 868 urb->transfer_buffer_length = count; 869 } 870 871 static const struct usb_protocol_ops snd_usbmidi_raw_ops = { 872 .input = snd_usbmidi_raw_input, 873 .output = snd_usbmidi_raw_output, 874 }; 875 876 /* 877 * FTDI protocol: raw MIDI bytes, but input packets have two modem status bytes. 878 */ 879 880 static void snd_usbmidi_ftdi_input(struct snd_usb_midi_in_endpoint *ep, 881 uint8_t *buffer, int buffer_length) 882 { 883 if (buffer_length > 2) 884 snd_usbmidi_input_data(ep, 0, buffer + 2, buffer_length - 2); 885 } 886 887 static const struct usb_protocol_ops snd_usbmidi_ftdi_ops = { 888 .input = snd_usbmidi_ftdi_input, 889 .output = snd_usbmidi_raw_output, 890 }; 891 892 static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep, 893 uint8_t *buffer, int buffer_length) 894 { 895 if (buffer_length != 9) 896 return; 897 buffer_length = 8; 898 while (buffer_length && buffer[buffer_length - 1] == 0xFD) 899 buffer_length--; 900 if (buffer_length) 901 snd_usbmidi_input_data(ep, 0, buffer, buffer_length); 902 } 903 904 static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep, 905 struct urb *urb) 906 { 907 int count; 908 909 if (!ep->ports[0].active) 910 return; 911 switch (snd_usb_get_speed(ep->umidi->dev)) { 912 case USB_SPEED_HIGH: 913 case USB_SPEED_SUPER: 914 count = 1; 915 break; 916 default: 917 count = 2; 918 } 919 count = snd_rawmidi_transmit(ep->ports[0].substream, 920 urb->transfer_buffer, 921 count); 922 if (count < 1) { 923 ep->ports[0].active = 0; 924 return; 925 } 926 927 memset(urb->transfer_buffer + count, 0xFD, ep->max_transfer - count); 928 urb->transfer_buffer_length = ep->max_transfer; 929 } 930 931 static const struct usb_protocol_ops snd_usbmidi_122l_ops = { 932 .input = snd_usbmidi_us122l_input, 933 .output = snd_usbmidi_us122l_output, 934 }; 935 936 /* 937 * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching. 938 */ 939 940 static void snd_usbmidi_emagic_init_out(struct snd_usb_midi_out_endpoint *ep) 941 { 942 static const u8 init_data[] = { 943 /* initialization magic: "get version" */ 944 0xf0, 945 0x00, 0x20, 0x31, /* Emagic */ 946 0x64, /* Unitor8 */ 947 0x0b, /* version number request */ 948 0x00, /* command version */ 949 0x00, /* EEPROM, box 0 */ 950 0xf7 951 }; 952 send_bulk_static_data(ep, init_data, sizeof(init_data)); 953 /* while we're at it, pour on more magic */ 954 send_bulk_static_data(ep, init_data, sizeof(init_data)); 955 } 956 957 static void snd_usbmidi_emagic_finish_out(struct snd_usb_midi_out_endpoint *ep) 958 { 959 static const u8 finish_data[] = { 960 /* switch to patch mode with last preset */ 961 0xf0, 962 0x00, 0x20, 0x31, /* Emagic */ 963 0x64, /* Unitor8 */ 964 0x10, /* patch switch command */ 965 0x00, /* command version */ 966 0x7f, /* to all boxes */ 967 0x40, /* last preset in EEPROM */ 968 0xf7 969 }; 970 send_bulk_static_data(ep, finish_data, sizeof(finish_data)); 971 } 972 973 static void snd_usbmidi_emagic_input(struct snd_usb_midi_in_endpoint *ep, 974 uint8_t *buffer, int buffer_length) 975 { 976 int i; 977 978 /* FF indicates end of valid data */ 979 for (i = 0; i < buffer_length; ++i) 980 if (buffer[i] == 0xff) { 981 buffer_length = i; 982 break; 983 } 984 985 /* handle F5 at end of last buffer */ 986 if (ep->seen_f5) 987 goto switch_port; 988 989 while (buffer_length > 0) { 990 /* determine size of data until next F5 */ 991 for (i = 0; i < buffer_length; ++i) 992 if (buffer[i] == 0xf5) 993 break; 994 snd_usbmidi_input_data(ep, ep->current_port, buffer, i); 995 buffer += i; 996 buffer_length -= i; 997 998 if (buffer_length <= 0) 999 break; 1000 /* assert(buffer[0] == 0xf5); */ 1001 ep->seen_f5 = 1; 1002 ++buffer; 1003 --buffer_length; 1004 1005 switch_port: 1006 if (buffer_length <= 0) 1007 break; 1008 if (buffer[0] < 0x80) { 1009 ep->current_port = (buffer[0] - 1) & 15; 1010 ++buffer; 1011 --buffer_length; 1012 } 1013 ep->seen_f5 = 0; 1014 } 1015 } 1016 1017 static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint *ep, 1018 struct urb *urb) 1019 { 1020 int port0 = ep->current_port; 1021 uint8_t *buf = urb->transfer_buffer; 1022 int buf_free = ep->max_transfer; 1023 int length, i; 1024 1025 for (i = 0; i < 0x10; ++i) { 1026 /* round-robin, starting at the last current port */ 1027 int portnum = (port0 + i) & 15; 1028 struct usbmidi_out_port *port = &ep->ports[portnum]; 1029 1030 if (!port->active) 1031 continue; 1032 if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) { 1033 port->active = 0; 1034 continue; 1035 } 1036 1037 if (portnum != ep->current_port) { 1038 if (buf_free < 2) 1039 break; 1040 ep->current_port = portnum; 1041 buf[0] = 0xf5; 1042 buf[1] = (portnum + 1) & 15; 1043 buf += 2; 1044 buf_free -= 2; 1045 } 1046 1047 if (buf_free < 1) 1048 break; 1049 length = snd_rawmidi_transmit(port->substream, buf, buf_free); 1050 if (length > 0) { 1051 buf += length; 1052 buf_free -= length; 1053 if (buf_free < 1) 1054 break; 1055 } 1056 } 1057 if (buf_free < ep->max_transfer && buf_free > 0) { 1058 *buf = 0xff; 1059 --buf_free; 1060 } 1061 urb->transfer_buffer_length = ep->max_transfer - buf_free; 1062 } 1063 1064 static const struct usb_protocol_ops snd_usbmidi_emagic_ops = { 1065 .input = snd_usbmidi_emagic_input, 1066 .output = snd_usbmidi_emagic_output, 1067 .init_out_endpoint = snd_usbmidi_emagic_init_out, 1068 .finish_out_endpoint = snd_usbmidi_emagic_finish_out, 1069 }; 1070 1071 1072 static void update_roland_altsetting(struct snd_usb_midi *umidi) 1073 { 1074 struct usb_interface *intf; 1075 struct usb_host_interface *hostif; 1076 struct usb_interface_descriptor *intfd; 1077 int is_light_load; 1078 1079 intf = umidi->iface; 1080 is_light_load = intf->cur_altsetting != intf->altsetting; 1081 if (umidi->roland_load_ctl->private_value == is_light_load) 1082 return; 1083 hostif = &intf->altsetting[umidi->roland_load_ctl->private_value]; 1084 intfd = get_iface_desc(hostif); 1085 snd_usbmidi_input_stop(&umidi->list); 1086 usb_set_interface(umidi->dev, intfd->bInterfaceNumber, 1087 intfd->bAlternateSetting); 1088 snd_usbmidi_input_start(&umidi->list); 1089 } 1090 1091 static int substream_open(struct snd_rawmidi_substream *substream, int dir, 1092 int open) 1093 { 1094 struct snd_usb_midi *umidi = substream->rmidi->private_data; 1095 struct snd_kcontrol *ctl; 1096 1097 down_read(&umidi->disc_rwsem); 1098 if (umidi->disconnected) { 1099 up_read(&umidi->disc_rwsem); 1100 return open ? -ENODEV : 0; 1101 } 1102 1103 mutex_lock(&umidi->mutex); 1104 if (open) { 1105 if (!umidi->opened[0] && !umidi->opened[1]) { 1106 if (umidi->roland_load_ctl) { 1107 ctl = umidi->roland_load_ctl; 1108 ctl->vd[0].access |= 1109 SNDRV_CTL_ELEM_ACCESS_INACTIVE; 1110 snd_ctl_notify(umidi->card, 1111 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id); 1112 update_roland_altsetting(umidi); 1113 } 1114 } 1115 umidi->opened[dir]++; 1116 if (umidi->opened[1]) 1117 snd_usbmidi_input_start(&umidi->list); 1118 } else { 1119 umidi->opened[dir]--; 1120 if (!umidi->opened[1]) 1121 snd_usbmidi_input_stop(&umidi->list); 1122 if (!umidi->opened[0] && !umidi->opened[1]) { 1123 if (umidi->roland_load_ctl) { 1124 ctl = umidi->roland_load_ctl; 1125 ctl->vd[0].access &= 1126 ~SNDRV_CTL_ELEM_ACCESS_INACTIVE; 1127 snd_ctl_notify(umidi->card, 1128 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id); 1129 } 1130 } 1131 } 1132 mutex_unlock(&umidi->mutex); 1133 up_read(&umidi->disc_rwsem); 1134 return 0; 1135 } 1136 1137 static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream) 1138 { 1139 struct snd_usb_midi *umidi = substream->rmidi->private_data; 1140 struct usbmidi_out_port *port = NULL; 1141 int i, j; 1142 1143 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) 1144 if (umidi->endpoints[i].out) 1145 for (j = 0; j < 0x10; ++j) 1146 if (umidi->endpoints[i].out->ports[j].substream == substream) { 1147 port = &umidi->endpoints[i].out->ports[j]; 1148 break; 1149 } 1150 if (!port) { 1151 snd_BUG(); 1152 return -ENXIO; 1153 } 1154 1155 substream->runtime->private_data = port; 1156 port->state = STATE_UNKNOWN; 1157 return substream_open(substream, 0, 1); 1158 } 1159 1160 static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream) 1161 { 1162 return substream_open(substream, 0, 0); 1163 } 1164 1165 static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream, 1166 int up) 1167 { 1168 struct usbmidi_out_port *port = 1169 (struct usbmidi_out_port *)substream->runtime->private_data; 1170 1171 port->active = up; 1172 if (up) { 1173 if (port->ep->umidi->disconnected) { 1174 /* gobble up remaining bytes to prevent wait in 1175 * snd_rawmidi_drain_output */ 1176 while (!snd_rawmidi_transmit_empty(substream)) 1177 snd_rawmidi_transmit_ack(substream, 1); 1178 return; 1179 } 1180 tasklet_schedule(&port->ep->tasklet); 1181 } 1182 } 1183 1184 static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream) 1185 { 1186 struct usbmidi_out_port *port = substream->runtime->private_data; 1187 struct snd_usb_midi_out_endpoint *ep = port->ep; 1188 unsigned int drain_urbs; 1189 DEFINE_WAIT(wait); 1190 long timeout = msecs_to_jiffies(50); 1191 1192 if (ep->umidi->disconnected) 1193 return; 1194 /* 1195 * The substream buffer is empty, but some data might still be in the 1196 * currently active URBs, so we have to wait for those to complete. 1197 */ 1198 spin_lock_irq(&ep->buffer_lock); 1199 drain_urbs = ep->active_urbs; 1200 if (drain_urbs) { 1201 ep->drain_urbs |= drain_urbs; 1202 do { 1203 prepare_to_wait(&ep->drain_wait, &wait, 1204 TASK_UNINTERRUPTIBLE); 1205 spin_unlock_irq(&ep->buffer_lock); 1206 timeout = schedule_timeout(timeout); 1207 spin_lock_irq(&ep->buffer_lock); 1208 drain_urbs &= ep->drain_urbs; 1209 } while (drain_urbs && timeout); 1210 finish_wait(&ep->drain_wait, &wait); 1211 } 1212 spin_unlock_irq(&ep->buffer_lock); 1213 } 1214 1215 static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream) 1216 { 1217 return substream_open(substream, 1, 1); 1218 } 1219 1220 static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream) 1221 { 1222 return substream_open(substream, 1, 0); 1223 } 1224 1225 static void snd_usbmidi_input_trigger(struct snd_rawmidi_substream *substream, 1226 int up) 1227 { 1228 struct snd_usb_midi *umidi = substream->rmidi->private_data; 1229 1230 if (up) 1231 set_bit(substream->number, &umidi->input_triggered); 1232 else 1233 clear_bit(substream->number, &umidi->input_triggered); 1234 } 1235 1236 static struct snd_rawmidi_ops snd_usbmidi_output_ops = { 1237 .open = snd_usbmidi_output_open, 1238 .close = snd_usbmidi_output_close, 1239 .trigger = snd_usbmidi_output_trigger, 1240 .drain = snd_usbmidi_output_drain, 1241 }; 1242 1243 static struct snd_rawmidi_ops snd_usbmidi_input_ops = { 1244 .open = snd_usbmidi_input_open, 1245 .close = snd_usbmidi_input_close, 1246 .trigger = snd_usbmidi_input_trigger 1247 }; 1248 1249 static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb, 1250 unsigned int buffer_length) 1251 { 1252 usb_free_coherent(umidi->dev, buffer_length, 1253 urb->transfer_buffer, urb->transfer_dma); 1254 usb_free_urb(urb); 1255 } 1256 1257 /* 1258 * Frees an input endpoint. 1259 * May be called when ep hasn't been initialized completely. 1260 */ 1261 static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint *ep) 1262 { 1263 unsigned int i; 1264 1265 for (i = 0; i < INPUT_URBS; ++i) 1266 if (ep->urbs[i]) 1267 free_urb_and_buffer(ep->umidi, ep->urbs[i], 1268 ep->urbs[i]->transfer_buffer_length); 1269 kfree(ep); 1270 } 1271 1272 /* 1273 * Creates an input endpoint. 1274 */ 1275 static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi *umidi, 1276 struct snd_usb_midi_endpoint_info *ep_info, 1277 struct snd_usb_midi_endpoint *rep) 1278 { 1279 struct snd_usb_midi_in_endpoint *ep; 1280 void *buffer; 1281 unsigned int pipe; 1282 int length; 1283 unsigned int i; 1284 1285 rep->in = NULL; 1286 ep = kzalloc(sizeof(*ep), GFP_KERNEL); 1287 if (!ep) 1288 return -ENOMEM; 1289 ep->umidi = umidi; 1290 1291 for (i = 0; i < INPUT_URBS; ++i) { 1292 ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL); 1293 if (!ep->urbs[i]) { 1294 snd_usbmidi_in_endpoint_delete(ep); 1295 return -ENOMEM; 1296 } 1297 } 1298 if (ep_info->in_interval) 1299 pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep); 1300 else 1301 pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep); 1302 length = usb_maxpacket(umidi->dev, pipe, 0); 1303 for (i = 0; i < INPUT_URBS; ++i) { 1304 buffer = usb_alloc_coherent(umidi->dev, length, GFP_KERNEL, 1305 &ep->urbs[i]->transfer_dma); 1306 if (!buffer) { 1307 snd_usbmidi_in_endpoint_delete(ep); 1308 return -ENOMEM; 1309 } 1310 if (ep_info->in_interval) 1311 usb_fill_int_urb(ep->urbs[i], umidi->dev, 1312 pipe, buffer, length, 1313 snd_usbmidi_in_urb_complete, 1314 ep, ep_info->in_interval); 1315 else 1316 usb_fill_bulk_urb(ep->urbs[i], umidi->dev, 1317 pipe, buffer, length, 1318 snd_usbmidi_in_urb_complete, ep); 1319 ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP; 1320 } 1321 1322 rep->in = ep; 1323 return 0; 1324 } 1325 1326 /* 1327 * Frees an output endpoint. 1328 * May be called when ep hasn't been initialized completely. 1329 */ 1330 static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep) 1331 { 1332 unsigned int i; 1333 1334 for (i = 0; i < OUTPUT_URBS; ++i) 1335 if (ep->urbs[i].urb) { 1336 free_urb_and_buffer(ep->umidi, ep->urbs[i].urb, 1337 ep->max_transfer); 1338 ep->urbs[i].urb = NULL; 1339 } 1340 } 1341 1342 static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep) 1343 { 1344 snd_usbmidi_out_endpoint_clear(ep); 1345 kfree(ep); 1346 } 1347 1348 /* 1349 * Creates an output endpoint, and initializes output ports. 1350 */ 1351 static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi *umidi, 1352 struct snd_usb_midi_endpoint_info *ep_info, 1353 struct snd_usb_midi_endpoint *rep) 1354 { 1355 struct snd_usb_midi_out_endpoint *ep; 1356 unsigned int i; 1357 unsigned int pipe; 1358 void *buffer; 1359 1360 rep->out = NULL; 1361 ep = kzalloc(sizeof(*ep), GFP_KERNEL); 1362 if (!ep) 1363 return -ENOMEM; 1364 ep->umidi = umidi; 1365 1366 for (i = 0; i < OUTPUT_URBS; ++i) { 1367 ep->urbs[i].urb = usb_alloc_urb(0, GFP_KERNEL); 1368 if (!ep->urbs[i].urb) { 1369 snd_usbmidi_out_endpoint_delete(ep); 1370 return -ENOMEM; 1371 } 1372 ep->urbs[i].ep = ep; 1373 } 1374 if (ep_info->out_interval) 1375 pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep); 1376 else 1377 pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep); 1378 switch (umidi->usb_id) { 1379 default: 1380 ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1); 1381 break; 1382 /* 1383 * Various chips declare a packet size larger than 4 bytes, but 1384 * do not actually work with larger packets: 1385 */ 1386 case USB_ID(0x0a67, 0x5011): /* Medeli DD305 */ 1387 case USB_ID(0x0a92, 0x1020): /* ESI M4U */ 1388 case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */ 1389 case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */ 1390 case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */ 1391 case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */ 1392 case USB_ID(0xfc08, 0x0101): /* Unknown vendor Cable */ 1393 ep->max_transfer = 4; 1394 break; 1395 /* 1396 * Some devices only work with 9 bytes packet size: 1397 */ 1398 case USB_ID(0x0644, 0x800E): /* Tascam US-122L */ 1399 case USB_ID(0x0644, 0x800F): /* Tascam US-144 */ 1400 ep->max_transfer = 9; 1401 break; 1402 } 1403 for (i = 0; i < OUTPUT_URBS; ++i) { 1404 buffer = usb_alloc_coherent(umidi->dev, 1405 ep->max_transfer, GFP_KERNEL, 1406 &ep->urbs[i].urb->transfer_dma); 1407 if (!buffer) { 1408 snd_usbmidi_out_endpoint_delete(ep); 1409 return -ENOMEM; 1410 } 1411 if (ep_info->out_interval) 1412 usb_fill_int_urb(ep->urbs[i].urb, umidi->dev, 1413 pipe, buffer, ep->max_transfer, 1414 snd_usbmidi_out_urb_complete, 1415 &ep->urbs[i], ep_info->out_interval); 1416 else 1417 usb_fill_bulk_urb(ep->urbs[i].urb, umidi->dev, 1418 pipe, buffer, ep->max_transfer, 1419 snd_usbmidi_out_urb_complete, 1420 &ep->urbs[i]); 1421 ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; 1422 } 1423 1424 spin_lock_init(&ep->buffer_lock); 1425 tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep); 1426 init_waitqueue_head(&ep->drain_wait); 1427 1428 for (i = 0; i < 0x10; ++i) 1429 if (ep_info->out_cables & (1 << i)) { 1430 ep->ports[i].ep = ep; 1431 ep->ports[i].cable = i << 4; 1432 } 1433 1434 if (umidi->usb_protocol_ops->init_out_endpoint) 1435 umidi->usb_protocol_ops->init_out_endpoint(ep); 1436 1437 rep->out = ep; 1438 return 0; 1439 } 1440 1441 /* 1442 * Frees everything. 1443 */ 1444 static void snd_usbmidi_free(struct snd_usb_midi *umidi) 1445 { 1446 int i; 1447 1448 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 1449 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i]; 1450 if (ep->out) 1451 snd_usbmidi_out_endpoint_delete(ep->out); 1452 if (ep->in) 1453 snd_usbmidi_in_endpoint_delete(ep->in); 1454 } 1455 mutex_destroy(&umidi->mutex); 1456 kfree(umidi); 1457 } 1458 1459 /* 1460 * Unlinks all URBs (must be done before the usb_device is deleted). 1461 */ 1462 void snd_usbmidi_disconnect(struct list_head *p) 1463 { 1464 struct snd_usb_midi *umidi; 1465 unsigned int i, j; 1466 1467 umidi = list_entry(p, struct snd_usb_midi, list); 1468 /* 1469 * an URB's completion handler may start the timer and 1470 * a timer may submit an URB. To reliably break the cycle 1471 * a flag under lock must be used 1472 */ 1473 down_write(&umidi->disc_rwsem); 1474 spin_lock_irq(&umidi->disc_lock); 1475 umidi->disconnected = 1; 1476 spin_unlock_irq(&umidi->disc_lock); 1477 up_write(&umidi->disc_rwsem); 1478 1479 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 1480 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i]; 1481 if (ep->out) 1482 tasklet_kill(&ep->out->tasklet); 1483 if (ep->out) { 1484 for (j = 0; j < OUTPUT_URBS; ++j) 1485 usb_kill_urb(ep->out->urbs[j].urb); 1486 if (umidi->usb_protocol_ops->finish_out_endpoint) 1487 umidi->usb_protocol_ops->finish_out_endpoint(ep->out); 1488 ep->out->active_urbs = 0; 1489 if (ep->out->drain_urbs) { 1490 ep->out->drain_urbs = 0; 1491 wake_up(&ep->out->drain_wait); 1492 } 1493 } 1494 if (ep->in) 1495 for (j = 0; j < INPUT_URBS; ++j) 1496 usb_kill_urb(ep->in->urbs[j]); 1497 /* free endpoints here; later call can result in Oops */ 1498 if (ep->out) 1499 snd_usbmidi_out_endpoint_clear(ep->out); 1500 if (ep->in) { 1501 snd_usbmidi_in_endpoint_delete(ep->in); 1502 ep->in = NULL; 1503 } 1504 } 1505 del_timer_sync(&umidi->error_timer); 1506 } 1507 EXPORT_SYMBOL(snd_usbmidi_disconnect); 1508 1509 static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi) 1510 { 1511 struct snd_usb_midi *umidi = rmidi->private_data; 1512 snd_usbmidi_free(umidi); 1513 } 1514 1515 static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi *umidi, 1516 int stream, 1517 int number) 1518 { 1519 struct snd_rawmidi_substream *substream; 1520 1521 list_for_each_entry(substream, &umidi->rmidi->streams[stream].substreams, 1522 list) { 1523 if (substream->number == number) 1524 return substream; 1525 } 1526 return NULL; 1527 } 1528 1529 /* 1530 * This list specifies names for ports that do not fit into the standard 1531 * "(product) MIDI (n)" schema because they aren't external MIDI ports, 1532 * such as internal control or synthesizer ports. 1533 */ 1534 static struct port_info { 1535 u32 id; 1536 short int port; 1537 short int voices; 1538 const char *name; 1539 unsigned int seq_flags; 1540 } snd_usbmidi_port_info[] = { 1541 #define PORT_INFO(vendor, product, num, name_, voices_, flags) \ 1542 { .id = USB_ID(vendor, product), \ 1543 .port = num, .voices = voices_, \ 1544 .name = name_, .seq_flags = flags } 1545 #define EXTERNAL_PORT(vendor, product, num, name) \ 1546 PORT_INFO(vendor, product, num, name, 0, \ 1547 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1548 SNDRV_SEQ_PORT_TYPE_HARDWARE | \ 1549 SNDRV_SEQ_PORT_TYPE_PORT) 1550 #define CONTROL_PORT(vendor, product, num, name) \ 1551 PORT_INFO(vendor, product, num, name, 0, \ 1552 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1553 SNDRV_SEQ_PORT_TYPE_HARDWARE) 1554 #define GM_SYNTH_PORT(vendor, product, num, name, voices) \ 1555 PORT_INFO(vendor, product, num, name, voices, \ 1556 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1557 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \ 1558 SNDRV_SEQ_PORT_TYPE_HARDWARE | \ 1559 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER) 1560 #define ROLAND_SYNTH_PORT(vendor, product, num, name, voices) \ 1561 PORT_INFO(vendor, product, num, name, voices, \ 1562 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1563 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \ 1564 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \ 1565 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \ 1566 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \ 1567 SNDRV_SEQ_PORT_TYPE_HARDWARE | \ 1568 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER) 1569 #define SOUNDCANVAS_PORT(vendor, product, num, name, voices) \ 1570 PORT_INFO(vendor, product, num, name, voices, \ 1571 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \ 1572 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \ 1573 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \ 1574 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \ 1575 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \ 1576 SNDRV_SEQ_PORT_TYPE_MIDI_MT32 | \ 1577 SNDRV_SEQ_PORT_TYPE_HARDWARE | \ 1578 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER) 1579 /* Yamaha MOTIF XF */ 1580 GM_SYNTH_PORT(0x0499, 0x105c, 0, "%s Tone Generator", 128), 1581 CONTROL_PORT(0x0499, 0x105c, 1, "%s Remote Control"), 1582 EXTERNAL_PORT(0x0499, 0x105c, 2, "%s Thru"), 1583 CONTROL_PORT(0x0499, 0x105c, 3, "%s Editor"), 1584 /* Roland UA-100 */ 1585 CONTROL_PORT(0x0582, 0x0000, 2, "%s Control"), 1586 /* Roland SC-8850 */ 1587 SOUNDCANVAS_PORT(0x0582, 0x0003, 0, "%s Part A", 128), 1588 SOUNDCANVAS_PORT(0x0582, 0x0003, 1, "%s Part B", 128), 1589 SOUNDCANVAS_PORT(0x0582, 0x0003, 2, "%s Part C", 128), 1590 SOUNDCANVAS_PORT(0x0582, 0x0003, 3, "%s Part D", 128), 1591 EXTERNAL_PORT(0x0582, 0x0003, 4, "%s MIDI 1"), 1592 EXTERNAL_PORT(0x0582, 0x0003, 5, "%s MIDI 2"), 1593 /* Roland U-8 */ 1594 EXTERNAL_PORT(0x0582, 0x0004, 0, "%s MIDI"), 1595 CONTROL_PORT(0x0582, 0x0004, 1, "%s Control"), 1596 /* Roland SC-8820 */ 1597 SOUNDCANVAS_PORT(0x0582, 0x0007, 0, "%s Part A", 64), 1598 SOUNDCANVAS_PORT(0x0582, 0x0007, 1, "%s Part B", 64), 1599 EXTERNAL_PORT(0x0582, 0x0007, 2, "%s MIDI"), 1600 /* Roland SK-500 */ 1601 SOUNDCANVAS_PORT(0x0582, 0x000b, 0, "%s Part A", 64), 1602 SOUNDCANVAS_PORT(0x0582, 0x000b, 1, "%s Part B", 64), 1603 EXTERNAL_PORT(0x0582, 0x000b, 2, "%s MIDI"), 1604 /* Roland SC-D70 */ 1605 SOUNDCANVAS_PORT(0x0582, 0x000c, 0, "%s Part A", 64), 1606 SOUNDCANVAS_PORT(0x0582, 0x000c, 1, "%s Part B", 64), 1607 EXTERNAL_PORT(0x0582, 0x000c, 2, "%s MIDI"), 1608 /* Edirol UM-880 */ 1609 CONTROL_PORT(0x0582, 0x0014, 8, "%s Control"), 1610 /* Edirol SD-90 */ 1611 ROLAND_SYNTH_PORT(0x0582, 0x0016, 0, "%s Part A", 128), 1612 ROLAND_SYNTH_PORT(0x0582, 0x0016, 1, "%s Part B", 128), 1613 EXTERNAL_PORT(0x0582, 0x0016, 2, "%s MIDI 1"), 1614 EXTERNAL_PORT(0x0582, 0x0016, 3, "%s MIDI 2"), 1615 /* Edirol UM-550 */ 1616 CONTROL_PORT(0x0582, 0x0023, 5, "%s Control"), 1617 /* Edirol SD-20 */ 1618 ROLAND_SYNTH_PORT(0x0582, 0x0027, 0, "%s Part A", 64), 1619 ROLAND_SYNTH_PORT(0x0582, 0x0027, 1, "%s Part B", 64), 1620 EXTERNAL_PORT(0x0582, 0x0027, 2, "%s MIDI"), 1621 /* Edirol SD-80 */ 1622 ROLAND_SYNTH_PORT(0x0582, 0x0029, 0, "%s Part A", 128), 1623 ROLAND_SYNTH_PORT(0x0582, 0x0029, 1, "%s Part B", 128), 1624 EXTERNAL_PORT(0x0582, 0x0029, 2, "%s MIDI 1"), 1625 EXTERNAL_PORT(0x0582, 0x0029, 3, "%s MIDI 2"), 1626 /* Edirol UA-700 */ 1627 EXTERNAL_PORT(0x0582, 0x002b, 0, "%s MIDI"), 1628 CONTROL_PORT(0x0582, 0x002b, 1, "%s Control"), 1629 /* Roland VariOS */ 1630 EXTERNAL_PORT(0x0582, 0x002f, 0, "%s MIDI"), 1631 EXTERNAL_PORT(0x0582, 0x002f, 1, "%s External MIDI"), 1632 EXTERNAL_PORT(0x0582, 0x002f, 2, "%s Sync"), 1633 /* Edirol PCR */ 1634 EXTERNAL_PORT(0x0582, 0x0033, 0, "%s MIDI"), 1635 EXTERNAL_PORT(0x0582, 0x0033, 1, "%s 1"), 1636 EXTERNAL_PORT(0x0582, 0x0033, 2, "%s 2"), 1637 /* BOSS GS-10 */ 1638 EXTERNAL_PORT(0x0582, 0x003b, 0, "%s MIDI"), 1639 CONTROL_PORT(0x0582, 0x003b, 1, "%s Control"), 1640 /* Edirol UA-1000 */ 1641 EXTERNAL_PORT(0x0582, 0x0044, 0, "%s MIDI"), 1642 CONTROL_PORT(0x0582, 0x0044, 1, "%s Control"), 1643 /* Edirol UR-80 */ 1644 EXTERNAL_PORT(0x0582, 0x0048, 0, "%s MIDI"), 1645 EXTERNAL_PORT(0x0582, 0x0048, 1, "%s 1"), 1646 EXTERNAL_PORT(0x0582, 0x0048, 2, "%s 2"), 1647 /* Edirol PCR-A */ 1648 EXTERNAL_PORT(0x0582, 0x004d, 0, "%s MIDI"), 1649 EXTERNAL_PORT(0x0582, 0x004d, 1, "%s 1"), 1650 EXTERNAL_PORT(0x0582, 0x004d, 2, "%s 2"), 1651 /* BOSS GT-PRO */ 1652 CONTROL_PORT(0x0582, 0x0089, 0, "%s Control"), 1653 /* Edirol UM-3EX */ 1654 CONTROL_PORT(0x0582, 0x009a, 3, "%s Control"), 1655 /* Roland VG-99 */ 1656 CONTROL_PORT(0x0582, 0x00b2, 0, "%s Control"), 1657 EXTERNAL_PORT(0x0582, 0x00b2, 1, "%s MIDI"), 1658 /* Cakewalk Sonar V-Studio 100 */ 1659 EXTERNAL_PORT(0x0582, 0x00eb, 0, "%s MIDI"), 1660 CONTROL_PORT(0x0582, 0x00eb, 1, "%s Control"), 1661 /* Roland VB-99 */ 1662 CONTROL_PORT(0x0582, 0x0102, 0, "%s Control"), 1663 EXTERNAL_PORT(0x0582, 0x0102, 1, "%s MIDI"), 1664 /* Roland A-PRO */ 1665 EXTERNAL_PORT(0x0582, 0x010f, 0, "%s MIDI"), 1666 CONTROL_PORT(0x0582, 0x010f, 1, "%s 1"), 1667 CONTROL_PORT(0x0582, 0x010f, 2, "%s 2"), 1668 /* Roland SD-50 */ 1669 ROLAND_SYNTH_PORT(0x0582, 0x0114, 0, "%s Synth", 128), 1670 EXTERNAL_PORT(0x0582, 0x0114, 1, "%s MIDI"), 1671 CONTROL_PORT(0x0582, 0x0114, 2, "%s Control"), 1672 /* Roland OCTA-CAPTURE */ 1673 EXTERNAL_PORT(0x0582, 0x0120, 0, "%s MIDI"), 1674 CONTROL_PORT(0x0582, 0x0120, 1, "%s Control"), 1675 EXTERNAL_PORT(0x0582, 0x0121, 0, "%s MIDI"), 1676 CONTROL_PORT(0x0582, 0x0121, 1, "%s Control"), 1677 /* Roland SPD-SX */ 1678 CONTROL_PORT(0x0582, 0x0145, 0, "%s Control"), 1679 EXTERNAL_PORT(0x0582, 0x0145, 1, "%s MIDI"), 1680 /* Roland A-Series */ 1681 CONTROL_PORT(0x0582, 0x0156, 0, "%s Keyboard"), 1682 EXTERNAL_PORT(0x0582, 0x0156, 1, "%s MIDI"), 1683 /* Roland INTEGRA-7 */ 1684 ROLAND_SYNTH_PORT(0x0582, 0x015b, 0, "%s Synth", 128), 1685 CONTROL_PORT(0x0582, 0x015b, 1, "%s Control"), 1686 /* M-Audio MidiSport 8x8 */ 1687 CONTROL_PORT(0x0763, 0x1031, 8, "%s Control"), 1688 CONTROL_PORT(0x0763, 0x1033, 8, "%s Control"), 1689 /* MOTU Fastlane */ 1690 EXTERNAL_PORT(0x07fd, 0x0001, 0, "%s MIDI A"), 1691 EXTERNAL_PORT(0x07fd, 0x0001, 1, "%s MIDI B"), 1692 /* Emagic Unitor8/AMT8/MT4 */ 1693 EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"), 1694 EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"), 1695 EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"), 1696 /* Akai MPD16 */ 1697 CONTROL_PORT(0x09e8, 0x0062, 0, "%s Control"), 1698 PORT_INFO(0x09e8, 0x0062, 1, "%s MIDI", 0, 1699 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | 1700 SNDRV_SEQ_PORT_TYPE_HARDWARE), 1701 /* Access Music Virus TI */ 1702 EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"), 1703 PORT_INFO(0x133e, 0x0815, 1, "%s Synth", 0, 1704 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | 1705 SNDRV_SEQ_PORT_TYPE_HARDWARE | 1706 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER), 1707 }; 1708 1709 static struct port_info *find_port_info(struct snd_usb_midi *umidi, int number) 1710 { 1711 int i; 1712 1713 for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) { 1714 if (snd_usbmidi_port_info[i].id == umidi->usb_id && 1715 snd_usbmidi_port_info[i].port == number) 1716 return &snd_usbmidi_port_info[i]; 1717 } 1718 return NULL; 1719 } 1720 1721 static void snd_usbmidi_get_port_info(struct snd_rawmidi *rmidi, int number, 1722 struct snd_seq_port_info *seq_port_info) 1723 { 1724 struct snd_usb_midi *umidi = rmidi->private_data; 1725 struct port_info *port_info; 1726 1727 /* TODO: read port flags from descriptors */ 1728 port_info = find_port_info(umidi, number); 1729 if (port_info) { 1730 seq_port_info->type = port_info->seq_flags; 1731 seq_port_info->midi_voices = port_info->voices; 1732 } 1733 } 1734 1735 static void snd_usbmidi_init_substream(struct snd_usb_midi *umidi, 1736 int stream, int number, 1737 struct snd_rawmidi_substream **rsubstream) 1738 { 1739 struct port_info *port_info; 1740 const char *name_format; 1741 1742 struct snd_rawmidi_substream *substream = 1743 snd_usbmidi_find_substream(umidi, stream, number); 1744 if (!substream) { 1745 dev_err(&umidi->dev->dev, "substream %d:%d not found\n", stream, 1746 number); 1747 return; 1748 } 1749 1750 /* TODO: read port name from jack descriptor */ 1751 port_info = find_port_info(umidi, number); 1752 name_format = port_info ? port_info->name : "%s MIDI %d"; 1753 snprintf(substream->name, sizeof(substream->name), 1754 name_format, umidi->card->shortname, number + 1); 1755 1756 *rsubstream = substream; 1757 } 1758 1759 /* 1760 * Creates the endpoints and their ports. 1761 */ 1762 static int snd_usbmidi_create_endpoints(struct snd_usb_midi *umidi, 1763 struct snd_usb_midi_endpoint_info *endpoints) 1764 { 1765 int i, j, err; 1766 int out_ports = 0, in_ports = 0; 1767 1768 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 1769 if (endpoints[i].out_cables) { 1770 err = snd_usbmidi_out_endpoint_create(umidi, 1771 &endpoints[i], 1772 &umidi->endpoints[i]); 1773 if (err < 0) 1774 return err; 1775 } 1776 if (endpoints[i].in_cables) { 1777 err = snd_usbmidi_in_endpoint_create(umidi, 1778 &endpoints[i], 1779 &umidi->endpoints[i]); 1780 if (err < 0) 1781 return err; 1782 } 1783 1784 for (j = 0; j < 0x10; ++j) { 1785 if (endpoints[i].out_cables & (1 << j)) { 1786 snd_usbmidi_init_substream(umidi, 1787 SNDRV_RAWMIDI_STREAM_OUTPUT, 1788 out_ports, 1789 &umidi->endpoints[i].out->ports[j].substream); 1790 ++out_ports; 1791 } 1792 if (endpoints[i].in_cables & (1 << j)) { 1793 snd_usbmidi_init_substream(umidi, 1794 SNDRV_RAWMIDI_STREAM_INPUT, 1795 in_ports, 1796 &umidi->endpoints[i].in->ports[j].substream); 1797 ++in_ports; 1798 } 1799 } 1800 } 1801 dev_dbg(&umidi->dev->dev, "created %d output and %d input ports\n", 1802 out_ports, in_ports); 1803 return 0; 1804 } 1805 1806 /* 1807 * Returns MIDIStreaming device capabilities. 1808 */ 1809 static int snd_usbmidi_get_ms_info(struct snd_usb_midi *umidi, 1810 struct snd_usb_midi_endpoint_info *endpoints) 1811 { 1812 struct usb_interface *intf; 1813 struct usb_host_interface *hostif; 1814 struct usb_interface_descriptor *intfd; 1815 struct usb_ms_header_descriptor *ms_header; 1816 struct usb_host_endpoint *hostep; 1817 struct usb_endpoint_descriptor *ep; 1818 struct usb_ms_endpoint_descriptor *ms_ep; 1819 int i, epidx; 1820 1821 intf = umidi->iface; 1822 if (!intf) 1823 return -ENXIO; 1824 hostif = &intf->altsetting[0]; 1825 intfd = get_iface_desc(hostif); 1826 ms_header = (struct usb_ms_header_descriptor *)hostif->extra; 1827 if (hostif->extralen >= 7 && 1828 ms_header->bLength >= 7 && 1829 ms_header->bDescriptorType == USB_DT_CS_INTERFACE && 1830 ms_header->bDescriptorSubtype == UAC_HEADER) 1831 dev_dbg(&umidi->dev->dev, "MIDIStreaming version %02x.%02x\n", 1832 ms_header->bcdMSC[1], ms_header->bcdMSC[0]); 1833 else 1834 dev_warn(&umidi->dev->dev, 1835 "MIDIStreaming interface descriptor not found\n"); 1836 1837 epidx = 0; 1838 for (i = 0; i < intfd->bNumEndpoints; ++i) { 1839 hostep = &hostif->endpoint[i]; 1840 ep = get_ep_desc(hostep); 1841 if (!usb_endpoint_xfer_bulk(ep) && !usb_endpoint_xfer_int(ep)) 1842 continue; 1843 ms_ep = (struct usb_ms_endpoint_descriptor *)hostep->extra; 1844 if (hostep->extralen < 4 || 1845 ms_ep->bLength < 4 || 1846 ms_ep->bDescriptorType != USB_DT_CS_ENDPOINT || 1847 ms_ep->bDescriptorSubtype != UAC_MS_GENERAL) 1848 continue; 1849 if (usb_endpoint_dir_out(ep)) { 1850 if (endpoints[epidx].out_ep) { 1851 if (++epidx >= MIDI_MAX_ENDPOINTS) { 1852 dev_warn(&umidi->dev->dev, 1853 "too many endpoints\n"); 1854 break; 1855 } 1856 } 1857 endpoints[epidx].out_ep = usb_endpoint_num(ep); 1858 if (usb_endpoint_xfer_int(ep)) 1859 endpoints[epidx].out_interval = ep->bInterval; 1860 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW) 1861 /* 1862 * Low speed bulk transfers don't exist, so 1863 * force interrupt transfers for devices like 1864 * ESI MIDI Mate that try to use them anyway. 1865 */ 1866 endpoints[epidx].out_interval = 1; 1867 endpoints[epidx].out_cables = 1868 (1 << ms_ep->bNumEmbMIDIJack) - 1; 1869 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n", 1870 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack); 1871 } else { 1872 if (endpoints[epidx].in_ep) { 1873 if (++epidx >= MIDI_MAX_ENDPOINTS) { 1874 dev_warn(&umidi->dev->dev, 1875 "too many endpoints\n"); 1876 break; 1877 } 1878 } 1879 endpoints[epidx].in_ep = usb_endpoint_num(ep); 1880 if (usb_endpoint_xfer_int(ep)) 1881 endpoints[epidx].in_interval = ep->bInterval; 1882 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW) 1883 endpoints[epidx].in_interval = 1; 1884 endpoints[epidx].in_cables = 1885 (1 << ms_ep->bNumEmbMIDIJack) - 1; 1886 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n", 1887 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack); 1888 } 1889 } 1890 return 0; 1891 } 1892 1893 static int roland_load_info(struct snd_kcontrol *kcontrol, 1894 struct snd_ctl_elem_info *info) 1895 { 1896 static const char *const names[] = { "High Load", "Light Load" }; 1897 1898 return snd_ctl_enum_info(info, 1, 2, names); 1899 } 1900 1901 static int roland_load_get(struct snd_kcontrol *kcontrol, 1902 struct snd_ctl_elem_value *value) 1903 { 1904 value->value.enumerated.item[0] = kcontrol->private_value; 1905 return 0; 1906 } 1907 1908 static int roland_load_put(struct snd_kcontrol *kcontrol, 1909 struct snd_ctl_elem_value *value) 1910 { 1911 struct snd_usb_midi *umidi = kcontrol->private_data; 1912 int changed; 1913 1914 if (value->value.enumerated.item[0] > 1) 1915 return -EINVAL; 1916 mutex_lock(&umidi->mutex); 1917 changed = value->value.enumerated.item[0] != kcontrol->private_value; 1918 if (changed) 1919 kcontrol->private_value = value->value.enumerated.item[0]; 1920 mutex_unlock(&umidi->mutex); 1921 return changed; 1922 } 1923 1924 static struct snd_kcontrol_new roland_load_ctl = { 1925 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1926 .name = "MIDI Input Mode", 1927 .info = roland_load_info, 1928 .get = roland_load_get, 1929 .put = roland_load_put, 1930 .private_value = 1, 1931 }; 1932 1933 /* 1934 * On Roland devices, use the second alternate setting to be able to use 1935 * the interrupt input endpoint. 1936 */ 1937 static void snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi *umidi) 1938 { 1939 struct usb_interface *intf; 1940 struct usb_host_interface *hostif; 1941 struct usb_interface_descriptor *intfd; 1942 1943 intf = umidi->iface; 1944 if (!intf || intf->num_altsetting != 2) 1945 return; 1946 1947 hostif = &intf->altsetting[1]; 1948 intfd = get_iface_desc(hostif); 1949 /* If either or both of the endpoints support interrupt transfer, 1950 * then use the alternate setting 1951 */ 1952 if (intfd->bNumEndpoints != 2 || 1953 !((get_endpoint(hostif, 0)->bmAttributes & 1954 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT || 1955 (get_endpoint(hostif, 1)->bmAttributes & 1956 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)) 1957 return; 1958 1959 dev_dbg(&umidi->dev->dev, "switching to altsetting %d with int ep\n", 1960 intfd->bAlternateSetting); 1961 usb_set_interface(umidi->dev, intfd->bInterfaceNumber, 1962 intfd->bAlternateSetting); 1963 1964 umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi); 1965 if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0) 1966 umidi->roland_load_ctl = NULL; 1967 } 1968 1969 /* 1970 * Try to find any usable endpoints in the interface. 1971 */ 1972 static int snd_usbmidi_detect_endpoints(struct snd_usb_midi *umidi, 1973 struct snd_usb_midi_endpoint_info *endpoint, 1974 int max_endpoints) 1975 { 1976 struct usb_interface *intf; 1977 struct usb_host_interface *hostif; 1978 struct usb_interface_descriptor *intfd; 1979 struct usb_endpoint_descriptor *epd; 1980 int i, out_eps = 0, in_eps = 0; 1981 1982 if (USB_ID_VENDOR(umidi->usb_id) == 0x0582) 1983 snd_usbmidi_switch_roland_altsetting(umidi); 1984 1985 if (endpoint[0].out_ep || endpoint[0].in_ep) 1986 return 0; 1987 1988 intf = umidi->iface; 1989 if (!intf || intf->num_altsetting < 1) 1990 return -ENOENT; 1991 hostif = intf->cur_altsetting; 1992 intfd = get_iface_desc(hostif); 1993 1994 for (i = 0; i < intfd->bNumEndpoints; ++i) { 1995 epd = get_endpoint(hostif, i); 1996 if (!usb_endpoint_xfer_bulk(epd) && 1997 !usb_endpoint_xfer_int(epd)) 1998 continue; 1999 if (out_eps < max_endpoints && 2000 usb_endpoint_dir_out(epd)) { 2001 endpoint[out_eps].out_ep = usb_endpoint_num(epd); 2002 if (usb_endpoint_xfer_int(epd)) 2003 endpoint[out_eps].out_interval = epd->bInterval; 2004 ++out_eps; 2005 } 2006 if (in_eps < max_endpoints && 2007 usb_endpoint_dir_in(epd)) { 2008 endpoint[in_eps].in_ep = usb_endpoint_num(epd); 2009 if (usb_endpoint_xfer_int(epd)) 2010 endpoint[in_eps].in_interval = epd->bInterval; 2011 ++in_eps; 2012 } 2013 } 2014 return (out_eps || in_eps) ? 0 : -ENOENT; 2015 } 2016 2017 /* 2018 * Detects the endpoints for one-port-per-endpoint protocols. 2019 */ 2020 static int snd_usbmidi_detect_per_port_endpoints(struct snd_usb_midi *umidi, 2021 struct snd_usb_midi_endpoint_info *endpoints) 2022 { 2023 int err, i; 2024 2025 err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS); 2026 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 2027 if (endpoints[i].out_ep) 2028 endpoints[i].out_cables = 0x0001; 2029 if (endpoints[i].in_ep) 2030 endpoints[i].in_cables = 0x0001; 2031 } 2032 return err; 2033 } 2034 2035 /* 2036 * Detects the endpoints and ports of Yamaha devices. 2037 */ 2038 static int snd_usbmidi_detect_yamaha(struct snd_usb_midi *umidi, 2039 struct snd_usb_midi_endpoint_info *endpoint) 2040 { 2041 struct usb_interface *intf; 2042 struct usb_host_interface *hostif; 2043 struct usb_interface_descriptor *intfd; 2044 uint8_t *cs_desc; 2045 2046 intf = umidi->iface; 2047 if (!intf) 2048 return -ENOENT; 2049 hostif = intf->altsetting; 2050 intfd = get_iface_desc(hostif); 2051 if (intfd->bNumEndpoints < 1) 2052 return -ENOENT; 2053 2054 /* 2055 * For each port there is one MIDI_IN/OUT_JACK descriptor, not 2056 * necessarily with any useful contents. So simply count 'em. 2057 */ 2058 for (cs_desc = hostif->extra; 2059 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2; 2060 cs_desc += cs_desc[0]) { 2061 if (cs_desc[1] == USB_DT_CS_INTERFACE) { 2062 if (cs_desc[2] == UAC_MIDI_IN_JACK) 2063 endpoint->in_cables = 2064 (endpoint->in_cables << 1) | 1; 2065 else if (cs_desc[2] == UAC_MIDI_OUT_JACK) 2066 endpoint->out_cables = 2067 (endpoint->out_cables << 1) | 1; 2068 } 2069 } 2070 if (!endpoint->in_cables && !endpoint->out_cables) 2071 return -ENOENT; 2072 2073 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1); 2074 } 2075 2076 /* 2077 * Detects the endpoints and ports of Roland devices. 2078 */ 2079 static int snd_usbmidi_detect_roland(struct snd_usb_midi *umidi, 2080 struct snd_usb_midi_endpoint_info *endpoint) 2081 { 2082 struct usb_interface *intf; 2083 struct usb_host_interface *hostif; 2084 u8 *cs_desc; 2085 2086 intf = umidi->iface; 2087 if (!intf) 2088 return -ENOENT; 2089 hostif = intf->altsetting; 2090 /* 2091 * Some devices have a descriptor <06 24 F1 02 <inputs> <outputs>>, 2092 * some have standard class descriptors, or both kinds, or neither. 2093 */ 2094 for (cs_desc = hostif->extra; 2095 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2; 2096 cs_desc += cs_desc[0]) { 2097 if (cs_desc[0] >= 6 && 2098 cs_desc[1] == USB_DT_CS_INTERFACE && 2099 cs_desc[2] == 0xf1 && 2100 cs_desc[3] == 0x02) { 2101 endpoint->in_cables = (1 << cs_desc[4]) - 1; 2102 endpoint->out_cables = (1 << cs_desc[5]) - 1; 2103 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1); 2104 } else if (cs_desc[0] >= 7 && 2105 cs_desc[1] == USB_DT_CS_INTERFACE && 2106 cs_desc[2] == UAC_HEADER) { 2107 return snd_usbmidi_get_ms_info(umidi, endpoint); 2108 } 2109 } 2110 2111 return -ENODEV; 2112 } 2113 2114 /* 2115 * Creates the endpoints and their ports for Midiman devices. 2116 */ 2117 static int snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi *umidi, 2118 struct snd_usb_midi_endpoint_info *endpoint) 2119 { 2120 struct snd_usb_midi_endpoint_info ep_info; 2121 struct usb_interface *intf; 2122 struct usb_host_interface *hostif; 2123 struct usb_interface_descriptor *intfd; 2124 struct usb_endpoint_descriptor *epd; 2125 int cable, err; 2126 2127 intf = umidi->iface; 2128 if (!intf) 2129 return -ENOENT; 2130 hostif = intf->altsetting; 2131 intfd = get_iface_desc(hostif); 2132 /* 2133 * The various MidiSport devices have more or less random endpoint 2134 * numbers, so we have to identify the endpoints by their index in 2135 * the descriptor array, like the driver for that other OS does. 2136 * 2137 * There is one interrupt input endpoint for all input ports, one 2138 * bulk output endpoint for even-numbered ports, and one for odd- 2139 * numbered ports. Both bulk output endpoints have corresponding 2140 * input bulk endpoints (at indices 1 and 3) which aren't used. 2141 */ 2142 if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) { 2143 dev_dbg(&umidi->dev->dev, "not enough endpoints\n"); 2144 return -ENOENT; 2145 } 2146 2147 epd = get_endpoint(hostif, 0); 2148 if (!usb_endpoint_dir_in(epd) || !usb_endpoint_xfer_int(epd)) { 2149 dev_dbg(&umidi->dev->dev, "endpoint[0] isn't interrupt\n"); 2150 return -ENXIO; 2151 } 2152 epd = get_endpoint(hostif, 2); 2153 if (!usb_endpoint_dir_out(epd) || !usb_endpoint_xfer_bulk(epd)) { 2154 dev_dbg(&umidi->dev->dev, "endpoint[2] isn't bulk output\n"); 2155 return -ENXIO; 2156 } 2157 if (endpoint->out_cables > 0x0001) { 2158 epd = get_endpoint(hostif, 4); 2159 if (!usb_endpoint_dir_out(epd) || 2160 !usb_endpoint_xfer_bulk(epd)) { 2161 dev_dbg(&umidi->dev->dev, 2162 "endpoint[4] isn't bulk output\n"); 2163 return -ENXIO; 2164 } 2165 } 2166 2167 ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress & 2168 USB_ENDPOINT_NUMBER_MASK; 2169 ep_info.out_interval = 0; 2170 ep_info.out_cables = endpoint->out_cables & 0x5555; 2171 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, 2172 &umidi->endpoints[0]); 2173 if (err < 0) 2174 return err; 2175 2176 ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress & 2177 USB_ENDPOINT_NUMBER_MASK; 2178 ep_info.in_interval = get_endpoint(hostif, 0)->bInterval; 2179 ep_info.in_cables = endpoint->in_cables; 2180 err = snd_usbmidi_in_endpoint_create(umidi, &ep_info, 2181 &umidi->endpoints[0]); 2182 if (err < 0) 2183 return err; 2184 2185 if (endpoint->out_cables > 0x0001) { 2186 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress & 2187 USB_ENDPOINT_NUMBER_MASK; 2188 ep_info.out_cables = endpoint->out_cables & 0xaaaa; 2189 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, 2190 &umidi->endpoints[1]); 2191 if (err < 0) 2192 return err; 2193 } 2194 2195 for (cable = 0; cable < 0x10; ++cable) { 2196 if (endpoint->out_cables & (1 << cable)) 2197 snd_usbmidi_init_substream(umidi, 2198 SNDRV_RAWMIDI_STREAM_OUTPUT, 2199 cable, 2200 &umidi->endpoints[cable & 1].out->ports[cable].substream); 2201 if (endpoint->in_cables & (1 << cable)) 2202 snd_usbmidi_init_substream(umidi, 2203 SNDRV_RAWMIDI_STREAM_INPUT, 2204 cable, 2205 &umidi->endpoints[0].in->ports[cable].substream); 2206 } 2207 return 0; 2208 } 2209 2210 static const struct snd_rawmidi_global_ops snd_usbmidi_ops = { 2211 .get_port_info = snd_usbmidi_get_port_info, 2212 }; 2213 2214 static int snd_usbmidi_create_rawmidi(struct snd_usb_midi *umidi, 2215 int out_ports, int in_ports) 2216 { 2217 struct snd_rawmidi *rmidi; 2218 int err; 2219 2220 err = snd_rawmidi_new(umidi->card, "USB MIDI", 2221 umidi->next_midi_device++, 2222 out_ports, in_ports, &rmidi); 2223 if (err < 0) 2224 return err; 2225 strcpy(rmidi->name, umidi->card->shortname); 2226 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | 2227 SNDRV_RAWMIDI_INFO_INPUT | 2228 SNDRV_RAWMIDI_INFO_DUPLEX; 2229 rmidi->ops = &snd_usbmidi_ops; 2230 rmidi->private_data = umidi; 2231 rmidi->private_free = snd_usbmidi_rawmidi_free; 2232 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 2233 &snd_usbmidi_output_ops); 2234 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 2235 &snd_usbmidi_input_ops); 2236 2237 umidi->rmidi = rmidi; 2238 return 0; 2239 } 2240 2241 /* 2242 * Temporarily stop input. 2243 */ 2244 void snd_usbmidi_input_stop(struct list_head *p) 2245 { 2246 struct snd_usb_midi *umidi; 2247 unsigned int i, j; 2248 2249 umidi = list_entry(p, struct snd_usb_midi, list); 2250 if (!umidi->input_running) 2251 return; 2252 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 2253 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i]; 2254 if (ep->in) 2255 for (j = 0; j < INPUT_URBS; ++j) 2256 usb_kill_urb(ep->in->urbs[j]); 2257 } 2258 umidi->input_running = 0; 2259 } 2260 EXPORT_SYMBOL(snd_usbmidi_input_stop); 2261 2262 static void snd_usbmidi_input_start_ep(struct snd_usb_midi_in_endpoint *ep) 2263 { 2264 unsigned int i; 2265 2266 if (!ep) 2267 return; 2268 for (i = 0; i < INPUT_URBS; ++i) { 2269 struct urb *urb = ep->urbs[i]; 2270 urb->dev = ep->umidi->dev; 2271 snd_usbmidi_submit_urb(urb, GFP_KERNEL); 2272 } 2273 } 2274 2275 /* 2276 * Resume input after a call to snd_usbmidi_input_stop(). 2277 */ 2278 void snd_usbmidi_input_start(struct list_head *p) 2279 { 2280 struct snd_usb_midi *umidi; 2281 int i; 2282 2283 umidi = list_entry(p, struct snd_usb_midi, list); 2284 if (umidi->input_running || !umidi->opened[1]) 2285 return; 2286 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) 2287 snd_usbmidi_input_start_ep(umidi->endpoints[i].in); 2288 umidi->input_running = 1; 2289 } 2290 EXPORT_SYMBOL(snd_usbmidi_input_start); 2291 2292 /* 2293 * Prepare for suspend. Typically called from the USB suspend callback. 2294 */ 2295 void snd_usbmidi_suspend(struct list_head *p) 2296 { 2297 struct snd_usb_midi *umidi; 2298 2299 umidi = list_entry(p, struct snd_usb_midi, list); 2300 mutex_lock(&umidi->mutex); 2301 snd_usbmidi_input_stop(p); 2302 mutex_unlock(&umidi->mutex); 2303 } 2304 EXPORT_SYMBOL(snd_usbmidi_suspend); 2305 2306 /* 2307 * Resume. Typically called from the USB resume callback. 2308 */ 2309 void snd_usbmidi_resume(struct list_head *p) 2310 { 2311 struct snd_usb_midi *umidi; 2312 2313 umidi = list_entry(p, struct snd_usb_midi, list); 2314 mutex_lock(&umidi->mutex); 2315 snd_usbmidi_input_start(p); 2316 mutex_unlock(&umidi->mutex); 2317 } 2318 EXPORT_SYMBOL(snd_usbmidi_resume); 2319 2320 /* 2321 * Creates and registers everything needed for a MIDI streaming interface. 2322 */ 2323 int snd_usbmidi_create(struct snd_card *card, 2324 struct usb_interface *iface, 2325 struct list_head *midi_list, 2326 const struct snd_usb_audio_quirk *quirk) 2327 { 2328 struct snd_usb_midi *umidi; 2329 struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS]; 2330 int out_ports, in_ports; 2331 int i, err; 2332 2333 umidi = kzalloc(sizeof(*umidi), GFP_KERNEL); 2334 if (!umidi) 2335 return -ENOMEM; 2336 umidi->dev = interface_to_usbdev(iface); 2337 umidi->card = card; 2338 umidi->iface = iface; 2339 umidi->quirk = quirk; 2340 umidi->usb_protocol_ops = &snd_usbmidi_standard_ops; 2341 spin_lock_init(&umidi->disc_lock); 2342 init_rwsem(&umidi->disc_rwsem); 2343 mutex_init(&umidi->mutex); 2344 umidi->usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor), 2345 le16_to_cpu(umidi->dev->descriptor.idProduct)); 2346 setup_timer(&umidi->error_timer, snd_usbmidi_error_timer, 2347 (unsigned long)umidi); 2348 2349 /* detect the endpoint(s) to use */ 2350 memset(endpoints, 0, sizeof(endpoints)); 2351 switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) { 2352 case QUIRK_MIDI_STANDARD_INTERFACE: 2353 err = snd_usbmidi_get_ms_info(umidi, endpoints); 2354 if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */ 2355 umidi->usb_protocol_ops = 2356 &snd_usbmidi_maudio_broken_running_status_ops; 2357 break; 2358 case QUIRK_MIDI_US122L: 2359 umidi->usb_protocol_ops = &snd_usbmidi_122l_ops; 2360 /* fall through */ 2361 case QUIRK_MIDI_FIXED_ENDPOINT: 2362 memcpy(&endpoints[0], quirk->data, 2363 sizeof(struct snd_usb_midi_endpoint_info)); 2364 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1); 2365 break; 2366 case QUIRK_MIDI_YAMAHA: 2367 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]); 2368 break; 2369 case QUIRK_MIDI_ROLAND: 2370 err = snd_usbmidi_detect_roland(umidi, &endpoints[0]); 2371 break; 2372 case QUIRK_MIDI_MIDIMAN: 2373 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops; 2374 memcpy(&endpoints[0], quirk->data, 2375 sizeof(struct snd_usb_midi_endpoint_info)); 2376 err = 0; 2377 break; 2378 case QUIRK_MIDI_NOVATION: 2379 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops; 2380 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2381 break; 2382 case QUIRK_MIDI_RAW_BYTES: 2383 umidi->usb_protocol_ops = &snd_usbmidi_raw_ops; 2384 /* 2385 * Interface 1 contains isochronous endpoints, but with the same 2386 * numbers as in interface 0. Since it is interface 1 that the 2387 * USB core has most recently seen, these descriptors are now 2388 * associated with the endpoint numbers. This will foul up our 2389 * attempts to submit bulk/interrupt URBs to the endpoints in 2390 * interface 0, so we have to make sure that the USB core looks 2391 * again at interface 0 by calling usb_set_interface() on it. 2392 */ 2393 if (umidi->usb_id == USB_ID(0x07fd, 0x0001)) /* MOTU Fastlane */ 2394 usb_set_interface(umidi->dev, 0, 0); 2395 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2396 break; 2397 case QUIRK_MIDI_EMAGIC: 2398 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops; 2399 memcpy(&endpoints[0], quirk->data, 2400 sizeof(struct snd_usb_midi_endpoint_info)); 2401 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1); 2402 break; 2403 case QUIRK_MIDI_CME: 2404 umidi->usb_protocol_ops = &snd_usbmidi_cme_ops; 2405 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2406 break; 2407 case QUIRK_MIDI_AKAI: 2408 umidi->usb_protocol_ops = &snd_usbmidi_akai_ops; 2409 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2410 /* endpoint 1 is input-only */ 2411 endpoints[1].out_cables = 0; 2412 break; 2413 case QUIRK_MIDI_FTDI: 2414 umidi->usb_protocol_ops = &snd_usbmidi_ftdi_ops; 2415 2416 /* set baud rate to 31250 (48 MHz / 16 / 96) */ 2417 err = usb_control_msg(umidi->dev, usb_sndctrlpipe(umidi->dev, 0), 2418 3, 0x40, 0x60, 0, NULL, 0, 1000); 2419 if (err < 0) 2420 break; 2421 2422 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2423 break; 2424 case QUIRK_MIDI_CH345: 2425 umidi->usb_protocol_ops = &snd_usbmidi_ch345_broken_sysex_ops; 2426 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); 2427 break; 2428 default: 2429 dev_err(&umidi->dev->dev, "invalid quirk type %d\n", 2430 quirk->type); 2431 err = -ENXIO; 2432 break; 2433 } 2434 if (err < 0) { 2435 kfree(umidi); 2436 return err; 2437 } 2438 2439 /* create rawmidi device */ 2440 out_ports = 0; 2441 in_ports = 0; 2442 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { 2443 out_ports += hweight16(endpoints[i].out_cables); 2444 in_ports += hweight16(endpoints[i].in_cables); 2445 } 2446 err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports); 2447 if (err < 0) { 2448 kfree(umidi); 2449 return err; 2450 } 2451 2452 /* create endpoint/port structures */ 2453 if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN) 2454 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]); 2455 else 2456 err = snd_usbmidi_create_endpoints(umidi, endpoints); 2457 if (err < 0) { 2458 return err; 2459 } 2460 2461 usb_autopm_get_interface_no_resume(umidi->iface); 2462 2463 list_add_tail(&umidi->list, midi_list); 2464 return 0; 2465 } 2466 EXPORT_SYMBOL(snd_usbmidi_create); 2467