sound/usb/midi.c

   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
  77 MODULE_AUTHOR("Clemens Ladisch <[email protected]>");
  78 MODULE_DESCRIPTION("USB Audio/MIDI helper module");
  79 MODULE_LICENSE("Dual BSD/GPL");
  80
  81 struct snd_usb_midi_in_endpoint;
  82 struct snd_usb_midi_out_endpoint;
  83 struct snd_usb_midi_endpoint;
  84
  85 struct 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
  93 struct 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
 120 struct 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
 153 struct 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
 167 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep);
 168
 169 static 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  */
 176 static 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  */
 187 static 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  */
 210 static 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
 225 static 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  */
 239 static 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
 263 static 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  */
 294 static 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
 331 static 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 */
 340 static 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 */
 368 static 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
 389 static 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
 403 static 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  */
 420 static 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  */
 461 static 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  */
 494 static 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  */
 507 static 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  */
 524 static 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  */
 541 static 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
 638 static 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
 659 static 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
 665 static 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
 671 static const
 672 struct 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
 678 static 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
 684 static 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  */
 705 static 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
 722 static 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
 784 static 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
 795 static 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
 803 static 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
 824 static 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
 833 static 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
 839 static 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
 856 static 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
 865 static 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
 872 static const struct usb_protocol_ops snd_usbmidi_ftdi_ops = {
 873         .input = snd_usbmidi_ftdi_input,
 874         .output = snd_usbmidi_raw_output,
 875 };
 876
 877 static 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
 889 static 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
 917 static 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
 926 static 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
 943 static 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
 959 static 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
1003 static 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
1050 static 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
1058 static 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
1077 static 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
1123 static 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                 snd_BUG();
1138                 return -ENXIO;
1139         }
1140
1141         substream->runtime->private_data = port;
1142         port->state = STATE_UNKNOWN;
1143         return substream_open(substream, 0, 1);
1144 }
1145
1146 static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream)
1147 {
1148         return substream_open(substream, 0, 0);
1149 }
1150
1151 static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream,
1152                                        int up)
1153 {
1154         struct usbmidi_out_port *port =
1155                 (struct usbmidi_out_port *)substream->runtime->private_data;
1156
1157         port->active = up;
1158         if (up) {
1159                 if (port->ep->umidi->disconnected) {
1160                         /* gobble up remaining bytes to prevent wait in
1161                          * snd_rawmidi_drain_output */
1162                         snd_rawmidi_proceed(substream);
1163                         return;
1164                 }
1165                 queue_work(system_highpri_wq, &port->ep->work);
1166         }
1167 }
1168
1169 static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream)
1170 {
1171         struct usbmidi_out_port *port = substream->runtime->private_data;
1172         struct snd_usb_midi_out_endpoint *ep = port->ep;
1173         unsigned int drain_urbs;
1174         DEFINE_WAIT(wait);
1175         long timeout = msecs_to_jiffies(50);
1176
1177         if (ep->umidi->disconnected)
1178                 return;
1179         /*
1180          * The substream buffer is empty, but some data might still be in the
1181          * currently active URBs, so we have to wait for those to complete.
1182          */
1183         spin_lock_irq(&ep->buffer_lock);
1184         drain_urbs = ep->active_urbs;
1185         if (drain_urbs) {
1186                 ep->drain_urbs |= drain_urbs;
1187                 do {
1188                         prepare_to_wait(&ep->drain_wait, &wait,
1189                                         TASK_UNINTERRUPTIBLE);
1190                         spin_unlock_irq(&ep->buffer_lock);
1191                         timeout = schedule_timeout(timeout);
1192                         spin_lock_irq(&ep->buffer_lock);
1193                         drain_urbs &= ep->drain_urbs;
1194                 } while (drain_urbs && timeout);
1195                 finish_wait(&ep->drain_wait, &wait);
1196         }
1197         spin_unlock_irq(&ep->buffer_lock);
1198 }
1199
1200 static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream)
1201 {
1202         return substream_open(substream, 1, 1);
1203 }
1204
1205 static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream)
1206 {
1207         return substream_open(substream, 1, 0);
1208 }
1209
1210 static void snd_usbmidi_input_trigger(struct snd_rawmidi_substream *substream,
1211                                       int up)
1212 {
1213         struct snd_usb_midi *umidi = substream->rmidi->private_data;
1214
1215         if (up)
1216                 set_bit(substream->number, &umidi->input_triggered);
1217         else
1218                 clear_bit(substream->number, &umidi->input_triggered);
1219 }
1220
1221 static const struct snd_rawmidi_ops snd_usbmidi_output_ops = {
1222         .open = snd_usbmidi_output_open,
1223         .close = snd_usbmidi_output_close,
1224         .trigger = snd_usbmidi_output_trigger,
1225         .drain = snd_usbmidi_output_drain,
1226 };
1227
1228 static const struct snd_rawmidi_ops snd_usbmidi_input_ops = {
1229         .open = snd_usbmidi_input_open,
1230         .close = snd_usbmidi_input_close,
1231         .trigger = snd_usbmidi_input_trigger
1232 };
1233
1234 static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb,
1235                                 unsigned int buffer_length)
1236 {
1237         usb_free_coherent(umidi->dev, buffer_length,
1238                           urb->transfer_buffer, urb->transfer_dma);
1239         usb_free_urb(urb);
1240 }
1241
1242 /*
1243  * Frees an input endpoint.
1244  * May be called when ep hasn't been initialized completely.
1245  */
1246 static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint *ep)
1247 {
1248         unsigned int i;
1249
1250         for (i = 0; i < INPUT_URBS; ++i)
1251                 if (ep->urbs[i])
1252                         free_urb_and_buffer(ep->umidi, ep->urbs[i],
1253                                             ep->urbs[i]->transfer_buffer_length);
1254         kfree(ep);
1255 }
1256
1257 /*
1258  * Creates an input endpoint.
1259  */
1260 static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi *umidi,
1261                                           struct snd_usb_midi_endpoint_info *ep_info,
1262                                           struct snd_usb_midi_endpoint *rep)
1263 {
1264         struct snd_usb_midi_in_endpoint *ep;
1265         void *buffer;
1266         unsigned int pipe;
1267         int length;
1268         unsigned int i;
1269         int err;
1270
1271         rep->in = NULL;
1272         ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1273         if (!ep)
1274                 return -ENOMEM;
1275         ep->umidi = umidi;
1276
1277         for (i = 0; i < INPUT_URBS; ++i) {
1278                 ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
1279                 if (!ep->urbs[i]) {
1280                         err = -ENOMEM;
1281                         goto error;
1282                 }
1283         }
1284         if (ep_info->in_interval)
1285                 pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep);
1286         else
1287                 pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep);
1288         length = usb_maxpacket(umidi->dev, pipe, 0);
1289         for (i = 0; i < INPUT_URBS; ++i) {
1290                 buffer = usb_alloc_coherent(umidi->dev, length, GFP_KERNEL,
1291                                             &ep->urbs[i]->transfer_dma);
1292                 if (!buffer) {
1293                         err = -ENOMEM;
1294                         goto error;
1295                 }
1296                 if (ep_info->in_interval)
1297                         usb_fill_int_urb(ep->urbs[i], umidi->dev,
1298                                          pipe, buffer, length,
1299                                          snd_usbmidi_in_urb_complete,
1300                                          ep, ep_info->in_interval);
1301                 else
1302                         usb_fill_bulk_urb(ep->urbs[i], umidi->dev,
1303                                           pipe, buffer, length,
1304                                           snd_usbmidi_in_urb_complete, ep);
1305                 ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1306                 err = usb_urb_ep_type_check(ep->urbs[i]);
1307                 if (err < 0) {
1308                         dev_err(&umidi->dev->dev, "invalid MIDI in EP %x\n",
1309                                 ep_info->in_ep);
1310                         goto error;
1311                 }
1312         }
1313
1314         rep->in = ep;
1315         return 0;
1316
1317  error:
1318         snd_usbmidi_in_endpoint_delete(ep);
1319         return err;
1320 }
1321
1322 /*
1323  * Frees an output endpoint.
1324  * May be called when ep hasn't been initialized completely.
1325  */
1326 static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep)
1327 {
1328         unsigned int i;
1329
1330         for (i = 0; i < OUTPUT_URBS; ++i)
1331                 if (ep->urbs[i].urb) {
1332                         free_urb_and_buffer(ep->umidi, ep->urbs[i].urb,
1333                                             ep->max_transfer);
1334                         ep->urbs[i].urb = NULL;
1335                 }
1336 }
1337
1338 static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep)
1339 {
1340         snd_usbmidi_out_endpoint_clear(ep);
1341         kfree(ep);
1342 }
1343
1344 /*
1345  * Creates an output endpoint, and initializes output ports.
1346  */
1347 static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi *umidi,
1348                                            struct snd_usb_midi_endpoint_info *ep_info,
1349                                            struct snd_usb_midi_endpoint *rep)
1350 {
1351         struct snd_usb_midi_out_endpoint *ep;
1352         unsigned int i;
1353         unsigned int pipe;
1354         void *buffer;
1355         int err;
1356
1357         rep->out = NULL;
1358         ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1359         if (!ep)
1360                 return -ENOMEM;
1361         ep->umidi = umidi;
1362
1363         for (i = 0; i < OUTPUT_URBS; ++i) {
1364                 ep->urbs[i].urb = usb_alloc_urb(0, GFP_KERNEL);
1365                 if (!ep->urbs[i].urb) {
1366                         err = -ENOMEM;
1367                         goto error;
1368                 }
1369                 ep->urbs[i].ep = ep;
1370         }
1371         if (ep_info->out_interval)
1372                 pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep);
1373         else
1374                 pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep);
1375         switch (umidi->usb_id) {
1376         default:
1377                 ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1);
1378                 break;
1379                 /*
1380                  * Various chips declare a packet size larger than 4 bytes, but
1381                  * do not actually work with larger packets:
1382                  */
1383         case USB_ID(0x0a67, 0x5011): /* Medeli DD305 */
1384         case USB_ID(0x0a92, 0x1020): /* ESI M4U */
1385         case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */
1386         case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */
1387         case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */
1388         case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */
1389         case USB_ID(0xfc08, 0x0101): /* Unknown vendor Cable */
1390                 ep->max_transfer = 4;
1391                 break;
1392                 /*
1393                  * Some devices only work with 9 bytes packet size:
1394                  */
1395         case USB_ID(0x0644, 0x800e): /* Tascam US-122L */
1396         case USB_ID(0x0644, 0x800f): /* Tascam US-144 */
1397                 ep->max_transfer = 9;
1398                 break;
1399         }
1400         for (i = 0; i < OUTPUT_URBS; ++i) {
1401                 buffer = usb_alloc_coherent(umidi->dev,
1402                                             ep->max_transfer, GFP_KERNEL,
1403                                             &ep->urbs[i].urb->transfer_dma);
1404                 if (!buffer) {
1405                         err = -ENOMEM;
1406                         goto error;
1407                 }
1408                 if (ep_info->out_interval)
1409                         usb_fill_int_urb(ep->urbs[i].urb, umidi->dev,
1410                                          pipe, buffer, ep->max_transfer,
1411                                          snd_usbmidi_out_urb_complete,
1412                                          &ep->urbs[i], ep_info->out_interval);
1413                 else
1414                         usb_fill_bulk_urb(ep->urbs[i].urb, umidi->dev,
1415                                           pipe, buffer, ep->max_transfer,
1416                                           snd_usbmidi_out_urb_complete,
1417                                           &ep->urbs[i]);
1418                 err = usb_urb_ep_type_check(ep->urbs[i].urb);
1419                 if (err < 0) {
1420                         dev_err(&umidi->dev->dev, "invalid MIDI out EP %x\n",
1421                                 ep_info->out_ep);
1422                         goto error;
1423                 }
1424                 ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1425         }
1426
1427         spin_lock_init(&ep->buffer_lock);
1428         INIT_WORK(&ep->work, snd_usbmidi_out_work);
1429         init_waitqueue_head(&ep->drain_wait);
1430
1431         for (i = 0; i < 0x10; ++i)
1432                 if (ep_info->out_cables & (1 << i)) {
1433                         ep->ports[i].ep = ep;
1434                         ep->ports[i].cable = i << 4;
1435                 }
1436
1437         if (umidi->usb_protocol_ops->init_out_endpoint)
1438                 umidi->usb_protocol_ops->init_out_endpoint(ep);
1439
1440         rep->out = ep;
1441         return 0;
1442
1443  error:
1444         snd_usbmidi_out_endpoint_delete(ep);
1445         return err;
1446 }
1447
1448 /*
1449  * Frees everything.
1450  */
1451 static void snd_usbmidi_free(struct snd_usb_midi *umidi)
1452 {
1453         int i;
1454
1455         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1456                 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
1457                 if (ep->out)
1458                         snd_usbmidi_out_endpoint_delete(ep->out);
1459                 if (ep->in)
1460                         snd_usbmidi_in_endpoint_delete(ep->in);
1461         }
1462         mutex_destroy(&umidi->mutex);
1463         kfree(umidi);
1464 }
1465
1466 /*
1467  * Unlinks all URBs (must be done before the usb_device is deleted).
1468  */
1469 void snd_usbmidi_disconnect(struct list_head *p)
1470 {
1471         struct snd_usb_midi *umidi;
1472         unsigned int i, j;
1473
1474         umidi = list_entry(p, struct snd_usb_midi, list);
1475         /*
1476          * an URB's completion handler may start the timer and
1477          * a timer may submit an URB. To reliably break the cycle
1478          * a flag under lock must be used
1479          */
1480         down_write(&umidi->disc_rwsem);
1481         spin_lock_irq(&umidi->disc_lock);
1482         umidi->disconnected = 1;
1483         spin_unlock_irq(&umidi->disc_lock);
1484         up_write(&umidi->disc_rwsem);
1485
1486         del_timer_sync(&umidi->error_timer);
1487
1488         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1489                 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
1490                 if (ep->out)
1491                         cancel_work_sync(&ep->out->work);
1492                 if (ep->out) {
1493                         for (j = 0; j < OUTPUT_URBS; ++j)
1494                                 usb_kill_urb(ep->out->urbs[j].urb);
1495                         if (umidi->usb_protocol_ops->finish_out_endpoint)
1496                                 umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
1497                         ep->out->active_urbs = 0;
1498                         if (ep->out->drain_urbs) {
1499                                 ep->out->drain_urbs = 0;
1500                                 wake_up(&ep->out->drain_wait);
1501                         }
1502                 }
1503                 if (ep->in)
1504                         for (j = 0; j < INPUT_URBS; ++j)
1505                                 usb_kill_urb(ep->in->urbs[j]);
1506                 /* free endpoints here; later call can result in Oops */
1507                 if (ep->out)
1508                         snd_usbmidi_out_endpoint_clear(ep->out);
1509                 if (ep->in) {
1510                         snd_usbmidi_in_endpoint_delete(ep->in);
1511                         ep->in = NULL;
1512                 }
1513         }
1514 }
1515 EXPORT_SYMBOL(snd_usbmidi_disconnect);
1516
1517 static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi)
1518 {
1519         struct snd_usb_midi *umidi = rmidi->private_data;
1520         snd_usbmidi_free(umidi);
1521 }
1522
1523 static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi *umidi,
1524                                                                 int stream,
1525                                                                 int number)
1526 {
1527         struct snd_rawmidi_substream *substream;
1528
1529         list_for_each_entry(substream, &umidi->rmidi->streams[stream].substreams,
1530                             list) {
1531                 if (substream->number == number)
1532                         return substream;
1533         }
1534         return NULL;
1535 }
1536
1537 /*
1538  * This list specifies names for ports that do not fit into the standard
1539  * "(product) MIDI (n)" schema because they aren't external MIDI ports,
1540  * such as internal control or synthesizer ports.
1541  */
1542 static struct port_info {
1543         u32 id;
1544         short int port;
1545         short int voices;
1546         const char *name;
1547         unsigned int seq_flags;
1548 } snd_usbmidi_port_info[] = {
1549 #define PORT_INFO(vendor, product, num, name_, voices_, flags) \
1550         { .id = USB_ID(vendor, product), \
1551           .port = num, .voices = voices_, \
1552           .name = name_, .seq_flags = flags }
1553 #define EXTERNAL_PORT(vendor, product, num, name) \
1554         PORT_INFO(vendor, product, num, name, 0, \
1555                   SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1556                   SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1557                   SNDRV_SEQ_PORT_TYPE_PORT)
1558 #define CONTROL_PORT(vendor, product, num, name) \
1559         PORT_INFO(vendor, product, num, name, 0, \
1560                   SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1561                   SNDRV_SEQ_PORT_TYPE_HARDWARE)
1562 #define GM_SYNTH_PORT(vendor, product, num, name, voices) \
1563         PORT_INFO(vendor, product, num, name, voices, \
1564                   SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1565                   SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1566                   SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1567                   SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1568 #define ROLAND_SYNTH_PORT(vendor, product, num, name, voices) \
1569         PORT_INFO(vendor, product, num, name, voices, \
1570                   SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1571                   SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1572                   SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1573                   SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1574                   SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1575                   SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1576                   SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1577 #define SOUNDCANVAS_PORT(vendor, product, num, name, voices) \
1578         PORT_INFO(vendor, product, num, name, voices, \
1579                   SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1580                   SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1581                   SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1582                   SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1583                   SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1584                   SNDRV_SEQ_PORT_TYPE_MIDI_MT32 | \
1585                   SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1586                   SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1587         /* Yamaha MOTIF XF */
1588         GM_SYNTH_PORT(0x0499, 0x105c, 0, "%s Tone Generator", 128),
1589         CONTROL_PORT(0x0499, 0x105c, 1, "%s Remote Control"),
1590         EXTERNAL_PORT(0x0499, 0x105c, 2, "%s Thru"),
1591         CONTROL_PORT(0x0499, 0x105c, 3, "%s Editor"),
1592         /* Roland UA-100 */
1593         CONTROL_PORT(0x0582, 0x0000, 2, "%s Control"),
1594         /* Roland SC-8850 */
1595         SOUNDCANVAS_PORT(0x0582, 0x0003, 0, "%s Part A", 128),
1596         SOUNDCANVAS_PORT(0x0582, 0x0003, 1, "%s Part B", 128),
1597         SOUNDCANVAS_PORT(0x0582, 0x0003, 2, "%s Part C", 128),
1598         SOUNDCANVAS_PORT(0x0582, 0x0003, 3, "%s Part D", 128),
1599         EXTERNAL_PORT(0x0582, 0x0003, 4, "%s MIDI 1"),
1600         EXTERNAL_PORT(0x0582, 0x0003, 5, "%s MIDI 2"),
1601         /* Roland U-8 */
1602         EXTERNAL_PORT(0x0582, 0x0004, 0, "%s MIDI"),
1603         CONTROL_PORT(0x0582, 0x0004, 1, "%s Control"),
1604         /* Roland SC-8820 */
1605         SOUNDCANVAS_PORT(0x0582, 0x0007, 0, "%s Part A", 64),
1606         SOUNDCANVAS_PORT(0x0582, 0x0007, 1, "%s Part B", 64),
1607         EXTERNAL_PORT(0x0582, 0x0007, 2, "%s MIDI"),
1608         /* Roland SK-500 */
1609         SOUNDCANVAS_PORT(0x0582, 0x000b, 0, "%s Part A", 64),
1610         SOUNDCANVAS_PORT(0x0582, 0x000b, 1, "%s Part B", 64),
1611         EXTERNAL_PORT(0x0582, 0x000b, 2, "%s MIDI"),
1612         /* Roland SC-D70 */
1613         SOUNDCANVAS_PORT(0x0582, 0x000c, 0, "%s Part A", 64),
1614         SOUNDCANVAS_PORT(0x0582, 0x000c, 1, "%s Part B", 64),
1615         EXTERNAL_PORT(0x0582, 0x000c, 2, "%s MIDI"),
1616         /* Edirol UM-880 */
1617         CONTROL_PORT(0x0582, 0x0014, 8, "%s Control"),
1618         /* Edirol SD-90 */
1619         ROLAND_SYNTH_PORT(0x0582, 0x0016, 0, "%s Part A", 128),
1620         ROLAND_SYNTH_PORT(0x0582, 0x0016, 1, "%s Part B", 128),
1621         EXTERNAL_PORT(0x0582, 0x0016, 2, "%s MIDI 1"),
1622         EXTERNAL_PORT(0x0582, 0x0016, 3, "%s MIDI 2"),
1623         /* Edirol UM-550 */
1624         CONTROL_PORT(0x0582, 0x0023, 5, "%s Control"),
1625         /* Edirol SD-20 */
1626         ROLAND_SYNTH_PORT(0x0582, 0x0027, 0, "%s Part A", 64),
1627         ROLAND_SYNTH_PORT(0x0582, 0x0027, 1, "%s Part B", 64),
1628         EXTERNAL_PORT(0x0582, 0x0027, 2, "%s MIDI"),
1629         /* Edirol SD-80 */
1630         ROLAND_SYNTH_PORT(0x0582, 0x0029, 0, "%s Part A", 128),
1631         ROLAND_SYNTH_PORT(0x0582, 0x0029, 1, "%s Part B", 128),
1632         EXTERNAL_PORT(0x0582, 0x0029, 2, "%s MIDI 1"),
1633         EXTERNAL_PORT(0x0582, 0x0029, 3, "%s MIDI 2"),
1634         /* Edirol UA-700 */
1635         EXTERNAL_PORT(0x0582, 0x002b, 0, "%s MIDI"),
1636         CONTROL_PORT(0x0582, 0x002b, 1, "%s Control"),
1637         /* Roland VariOS */
1638         EXTERNAL_PORT(0x0582, 0x002f, 0, "%s MIDI"),
1639         EXTERNAL_PORT(0x0582, 0x002f, 1, "%s External MIDI"),
1640         EXTERNAL_PORT(0x0582, 0x002f, 2, "%s Sync"),
1641         /* Edirol PCR */
1642         EXTERNAL_PORT(0x0582, 0x0033, 0, "%s MIDI"),
1643         EXTERNAL_PORT(0x0582, 0x0033, 1, "%s 1"),
1644         EXTERNAL_PORT(0x0582, 0x0033, 2, "%s 2"),
1645         /* BOSS GS-10 */
1646         EXTERNAL_PORT(0x0582, 0x003b, 0, "%s MIDI"),
1647         CONTROL_PORT(0x0582, 0x003b, 1, "%s Control"),
1648         /* Edirol UA-1000 */
1649         EXTERNAL_PORT(0x0582, 0x0044, 0, "%s MIDI"),
1650         CONTROL_PORT(0x0582, 0x0044, 1, "%s Control"),
1651         /* Edirol UR-80 */
1652         EXTERNAL_PORT(0x0582, 0x0048, 0, "%s MIDI"),
1653         EXTERNAL_PORT(0x0582, 0x0048, 1, "%s 1"),
1654         EXTERNAL_PORT(0x0582, 0x0048, 2, "%s 2"),
1655         /* Edirol PCR-A */
1656         EXTERNAL_PORT(0x0582, 0x004d, 0, "%s MIDI"),
1657         EXTERNAL_PORT(0x0582, 0x004d, 1, "%s 1"),
1658         EXTERNAL_PORT(0x0582, 0x004d, 2, "%s 2"),
1659         /* BOSS GT-PRO */
1660         CONTROL_PORT(0x0582, 0x0089, 0, "%s Control"),
1661         /* Edirol UM-3EX */
1662         CONTROL_PORT(0x0582, 0x009a, 3, "%s Control"),
1663         /* Roland VG-99 */
1664         CONTROL_PORT(0x0582, 0x00b2, 0, "%s Control"),
1665         EXTERNAL_PORT(0x0582, 0x00b2, 1, "%s MIDI"),
1666         /* Cakewalk Sonar V-Studio 100 */
1667         EXTERNAL_PORT(0x0582, 0x00eb, 0, "%s MIDI"),
1668         CONTROL_PORT(0x0582, 0x00eb, 1, "%s Control"),
1669         /* Roland VB-99 */
1670         CONTROL_PORT(0x0582, 0x0102, 0, "%s Control"),
1671         EXTERNAL_PORT(0x0582, 0x0102, 1, "%s MIDI"),
1672         /* Roland A-PRO */
1673         EXTERNAL_PORT(0x0582, 0x010f, 0, "%s MIDI"),
1674         CONTROL_PORT(0x0582, 0x010f, 1, "%s 1"),
1675         CONTROL_PORT(0x0582, 0x010f, 2, "%s 2"),
1676         /* Roland SD-50 */
1677         ROLAND_SYNTH_PORT(0x0582, 0x0114, 0, "%s Synth", 128),
1678         EXTERNAL_PORT(0x0582, 0x0114, 1, "%s MIDI"),
1679         CONTROL_PORT(0x0582, 0x0114, 2, "%s Control"),
1680         /* Roland OCTA-CAPTURE */
1681         EXTERNAL_PORT(0x0582, 0x0120, 0, "%s MIDI"),
1682         CONTROL_PORT(0x0582, 0x0120, 1, "%s Control"),
1683         EXTERNAL_PORT(0x0582, 0x0121, 0, "%s MIDI"),
1684         CONTROL_PORT(0x0582, 0x0121, 1, "%s Control"),
1685         /* Roland SPD-SX */
1686         CONTROL_PORT(0x0582, 0x0145, 0, "%s Control"),
1687         EXTERNAL_PORT(0x0582, 0x0145, 1, "%s MIDI"),
1688         /* Roland A-Series */
1689         CONTROL_PORT(0x0582, 0x0156, 0, "%s Keyboard"),
1690         EXTERNAL_PORT(0x0582, 0x0156, 1, "%s MIDI"),
1691         /* Roland INTEGRA-7 */
1692         ROLAND_SYNTH_PORT(0x0582, 0x015b, 0, "%s Synth", 128),
1693         CONTROL_PORT(0x0582, 0x015b, 1, "%s Control"),
1694         /* M-Audio MidiSport 8x8 */
1695         CONTROL_PORT(0x0763, 0x1031, 8, "%s Control"),
1696         CONTROL_PORT(0x0763, 0x1033, 8, "%s Control"),
1697         /* MOTU Fastlane */
1698         EXTERNAL_PORT(0x07fd, 0x0001, 0, "%s MIDI A"),
1699         EXTERNAL_PORT(0x07fd, 0x0001, 1, "%s MIDI B"),
1700         /* Emagic Unitor8/AMT8/MT4 */
1701         EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"),
1702         EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"),
1703         EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"),
1704         /* Akai MPD16 */
1705         CONTROL_PORT(0x09e8, 0x0062, 0, "%s Control"),
1706         PORT_INFO(0x09e8, 0x0062, 1, "%s MIDI", 0,
1707                 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1708                 SNDRV_SEQ_PORT_TYPE_HARDWARE),
1709         /* Access Music Virus TI */
1710         EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"),
1711         PORT_INFO(0x133e, 0x0815, 1, "%s Synth", 0,
1712                 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1713                 SNDRV_SEQ_PORT_TYPE_HARDWARE |
1714                 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER),
1715 };
1716
1717 static struct port_info *find_port_info(struct snd_usb_midi *umidi, int number)
1718 {
1719         int i;
1720
1721         for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) {
1722                 if (snd_usbmidi_port_info[i].id == umidi->usb_id &&
1723                     snd_usbmidi_port_info[i].port == number)
1724                         return &snd_usbmidi_port_info[i];
1725         }
1726         return NULL;
1727 }
1728
1729 static void snd_usbmidi_get_port_info(struct snd_rawmidi *rmidi, int number,
1730                                       struct snd_seq_port_info *seq_port_info)
1731 {
1732         struct snd_usb_midi *umidi = rmidi->private_data;
1733         struct port_info *port_info;
1734
1735         /* TODO: read port flags from descriptors */
1736         port_info = find_port_info(umidi, number);
1737         if (port_info) {
1738                 seq_port_info->type = port_info->seq_flags;
1739                 seq_port_info->midi_voices = port_info->voices;
1740         }
1741 }
1742
1743 static struct usb_midi_in_jack_descriptor *find_usb_in_jack_descriptor(
1744                                         struct usb_host_interface *hostif, uint8_t jack_id)
1745 {
1746         unsigned char *extra = hostif->extra;
1747         int extralen = hostif->extralen;
1748
1749         while (extralen > 4) {
1750                 struct usb_midi_in_jack_descriptor *injd =
1751                                 (struct usb_midi_in_jack_descriptor *)extra;
1752
1753                 if (injd->bLength >= sizeof(*injd) &&
1754                     injd->bDescriptorType == USB_DT_CS_INTERFACE &&
1755                     injd->bDescriptorSubtype == UAC_MIDI_IN_JACK &&
1756                                 injd->bJackID == jack_id)
1757                         return injd;
1758                 if (!extra[0])
1759                         break;
1760                 extralen -= extra[0];
1761                 extra += extra[0];
1762         }
1763         return NULL;
1764 }
1765
1766 static struct usb_midi_out_jack_descriptor *find_usb_out_jack_descriptor(
1767                                         struct usb_host_interface *hostif, uint8_t jack_id)
1768 {
1769         unsigned char *extra = hostif->extra;
1770         int extralen = hostif->extralen;
1771
1772         while (extralen > 4) {
1773                 struct usb_midi_out_jack_descriptor *outjd =
1774                                 (struct usb_midi_out_jack_descriptor *)extra;
1775
1776                 if (outjd->bLength >= sizeof(*outjd) &&
1777                     outjd->bDescriptorType == USB_DT_CS_INTERFACE &&
1778                     outjd->bDescriptorSubtype == UAC_MIDI_OUT_JACK &&
1779                                 outjd->bJackID == jack_id)
1780                         return outjd;
1781                 if (!extra[0])
1782                         break;
1783                 extralen -= extra[0];
1784                 extra += extra[0];
1785         }
1786         return NULL;
1787 }
1788
1789 static void snd_usbmidi_init_substream(struct snd_usb_midi *umidi,
1790                                        int stream, int number, int jack_id,
1791                                        struct snd_rawmidi_substream **rsubstream)
1792 {
1793         struct port_info *port_info;
1794         const char *name_format;
1795         struct usb_interface *intf;
1796         struct usb_host_interface *hostif;
1797         struct usb_midi_in_jack_descriptor *injd;
1798         struct usb_midi_out_jack_descriptor *outjd;
1799         uint8_t jack_name_buf[32];
1800         uint8_t *default_jack_name = "MIDI";
1801         uint8_t *jack_name = default_jack_name;
1802         uint8_t iJack;
1803         size_t sz;
1804         int res;
1805
1806         struct snd_rawmidi_substream *substream =
1807                 snd_usbmidi_find_substream(umidi, stream, number);
1808         if (!substream) {
1809                 dev_err(&umidi->dev->dev, "substream %d:%d not found\n", stream,
1810                         number);
1811                 return;
1812         }
1813
1814         intf = umidi->iface;
1815         if (intf && jack_id >= 0) {
1816                 hostif = intf->cur_altsetting;
1817                 iJack = 0;
1818                 if (stream != SNDRV_RAWMIDI_STREAM_OUTPUT) {
1819                         /* in jacks connect to outs */
1820                         outjd = find_usb_out_jack_descriptor(hostif, jack_id);
1821                         if (outjd) {
1822                                 sz = USB_DT_MIDI_OUT_SIZE(outjd->bNrInputPins);
1823                                 if (outjd->bLength >= sz)
1824                                         iJack = *(((uint8_t *) outjd) + sz - sizeof(uint8_t));
1825                         }
1826                 } else {
1827                         /* and out jacks connect to ins */
1828                         injd = find_usb_in_jack_descriptor(hostif, jack_id);
1829                         if (injd)
1830                                 iJack = injd->iJack;
1831                 }
1832                 if (iJack != 0) {
1833                         res = usb_string(umidi->dev, iJack, jack_name_buf,
1834                           ARRAY_SIZE(jack_name_buf));
1835                         if (res)
1836                                 jack_name = jack_name_buf;
1837                 }
1838         }
1839
1840         port_info = find_port_info(umidi, number);
1841         name_format = port_info ? port_info->name :
1842                 (jack_name != default_jack_name  ? "%s %s" : "%s %s %d");
1843         snprintf(substream->name, sizeof(substream->name),
1844                  name_format, umidi->card->shortname, jack_name, number + 1);
1845
1846         *rsubstream = substream;
1847 }
1848
1849 /*
1850  * Creates the endpoints and their ports.
1851  */
1852 static int snd_usbmidi_create_endpoints(struct snd_usb_midi *umidi,
1853                                         struct snd_usb_midi_endpoint_info *endpoints)
1854 {
1855         int i, j, err;
1856         int out_ports = 0, in_ports = 0;
1857
1858         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1859                 if (endpoints[i].out_cables) {
1860                         err = snd_usbmidi_out_endpoint_create(umidi,
1861                                                               &endpoints[i],
1862                                                               &umidi->endpoints[i]);
1863                         if (err < 0)
1864                                 return err;
1865                 }
1866                 if (endpoints[i].in_cables) {
1867                         err = snd_usbmidi_in_endpoint_create(umidi,
1868                                                              &endpoints[i],
1869                                                              &umidi->endpoints[i]);
1870                         if (err < 0)
1871                                 return err;
1872                 }
1873
1874                 for (j = 0; j < 0x10; ++j) {
1875                         if (endpoints[i].out_cables & (1 << j)) {
1876                                 snd_usbmidi_init_substream(umidi,
1877                                                            SNDRV_RAWMIDI_STREAM_OUTPUT,
1878                                                            out_ports,
1879                                                            endpoints[i].assoc_out_jacks[j],
1880                                                            &umidi->endpoints[i].out->ports[j].substream);
1881                                 ++out_ports;
1882                         }
1883                         if (endpoints[i].in_cables & (1 << j)) {
1884                                 snd_usbmidi_init_substream(umidi,
1885                                                            SNDRV_RAWMIDI_STREAM_INPUT,
1886                                                            in_ports,
1887                                                            endpoints[i].assoc_in_jacks[j],
1888                                                            &umidi->endpoints[i].in->ports[j].substream);
1889                                 ++in_ports;
1890                         }
1891                 }
1892         }
1893         dev_dbg(&umidi->dev->dev, "created %d output and %d input ports\n",
1894                     out_ports, in_ports);
1895         return 0;
1896 }
1897
1898 static struct usb_ms_endpoint_descriptor *find_usb_ms_endpoint_descriptor(
1899                                         struct usb_host_endpoint *hostep)
1900 {
1901         unsigned char *extra = hostep->extra;
1902         int extralen = hostep->extralen;
1903
1904         while (extralen > 3) {
1905                 struct usb_ms_endpoint_descriptor *ms_ep =
1906                                 (struct usb_ms_endpoint_descriptor *)extra;
1907
1908                 if (ms_ep->bLength > 3 &&
1909                     ms_ep->bDescriptorType == USB_DT_CS_ENDPOINT &&
1910                     ms_ep->bDescriptorSubtype == UAC_MS_GENERAL)
1911                         return ms_ep;
1912                 if (!extra[0])
1913                         break;
1914                 extralen -= extra[0];
1915                 extra += extra[0];
1916         }
1917         return NULL;
1918 }
1919
1920 /*
1921  * Returns MIDIStreaming device capabilities.
1922  */
1923 static int snd_usbmidi_get_ms_info(struct snd_usb_midi *umidi,
1924                                    struct snd_usb_midi_endpoint_info *endpoints)
1925 {
1926         struct usb_interface *intf;
1927         struct usb_host_interface *hostif;
1928         struct usb_interface_descriptor *intfd;
1929         struct usb_ms_header_descriptor *ms_header;
1930         struct usb_host_endpoint *hostep;
1931         struct usb_endpoint_descriptor *ep;
1932         struct usb_ms_endpoint_descriptor *ms_ep;
1933         int i, j, epidx;
1934
1935         intf = umidi->iface;
1936         if (!intf)
1937                 return -ENXIO;
1938         hostif = &intf->altsetting[0];
1939         intfd = get_iface_desc(hostif);
1940         ms_header = (struct usb_ms_header_descriptor *)hostif->extra;
1941         if (hostif->extralen >= 7 &&
1942             ms_header->bLength >= 7 &&
1943             ms_header->bDescriptorType == USB_DT_CS_INTERFACE &&
1944             ms_header->bDescriptorSubtype == UAC_HEADER)
1945                 dev_dbg(&umidi->dev->dev, "MIDIStreaming version %02x.%02x\n",
1946                             ((uint8_t *)&ms_header->bcdMSC)[1], ((uint8_t *)&ms_header->bcdMSC)[0]);
1947         else
1948                 dev_warn(&umidi->dev->dev,
1949                          "MIDIStreaming interface descriptor not found\n");
1950
1951         epidx = 0;
1952         for (i = 0; i < intfd->bNumEndpoints; ++i) {
1953                 hostep = &hostif->endpoint[i];
1954                 ep = get_ep_desc(hostep);
1955                 if (!usb_endpoint_xfer_bulk(ep) && !usb_endpoint_xfer_int(ep))
1956                         continue;
1957                 ms_ep = find_usb_ms_endpoint_descriptor(hostep);
1958                 if (!ms_ep)
1959                         continue;
1960                 if (ms_ep->bLength <= sizeof(*ms_ep))
1961                         continue;
1962                 if (ms_ep->bNumEmbMIDIJack > 0x10)
1963                         continue;
1964                 if (ms_ep->bLength < sizeof(*ms_ep) + ms_ep->bNumEmbMIDIJack)
1965                         continue;
1966                 if (usb_endpoint_dir_out(ep)) {
1967                         if (endpoints[epidx].out_ep) {
1968                                 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1969                                         dev_warn(&umidi->dev->dev,
1970                                                  "too many endpoints\n");
1971                                         break;
1972                                 }
1973                         }
1974                         endpoints[epidx].out_ep = usb_endpoint_num(ep);
1975                         if (usb_endpoint_xfer_int(ep))
1976                                 endpoints[epidx].out_interval = ep->bInterval;
1977                         else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1978                                 /*
1979                                  * Low speed bulk transfers don't exist, so
1980                                  * force interrupt transfers for devices like
1981                                  * ESI MIDI Mate that try to use them anyway.
1982                                  */
1983                                 endpoints[epidx].out_interval = 1;
1984                         endpoints[epidx].out_cables =
1985                                 (1 << ms_ep->bNumEmbMIDIJack) - 1;
1986                         for (j = 0; j < ms_ep->bNumEmbMIDIJack; ++j)
1987                                 endpoints[epidx].assoc_out_jacks[j] = ms_ep->baAssocJackID[j];
1988                         for (; j < ARRAY_SIZE(endpoints[epidx].assoc_out_jacks); ++j)
1989                                 endpoints[epidx].assoc_out_jacks[j] = -1;
1990                         dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",
1991                                 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1992                 } else {
1993                         if (endpoints[epidx].in_ep) {
1994                                 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1995                                         dev_warn(&umidi->dev->dev,
1996                                                  "too many endpoints\n");
1997                                         break;
1998                                 }
1999                         }
2000                         endpoints[epidx].in_ep = usb_endpoint_num(ep);
2001                         if (usb_endpoint_xfer_int(ep))
2002                                 endpoints[epidx].in_interval = ep->bInterval;
2003                         else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
2004                                 endpoints[epidx].in_interval = 1;
2005                         endpoints[epidx].in_cables =
2006                                 (1 << ms_ep->bNumEmbMIDIJack) - 1;
2007                         for (j = 0; j < ms_ep->bNumEmbMIDIJack; ++j)
2008                                 endpoints[epidx].assoc_in_jacks[j] = ms_ep->baAssocJackID[j];
2009                         for (; j < ARRAY_SIZE(endpoints[epidx].assoc_in_jacks); ++j)
2010                                 endpoints[epidx].assoc_in_jacks[j] = -1;
2011                         dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",
2012                                 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
2013                 }
2014         }
2015         return 0;
2016 }
2017
2018 static int roland_load_info(struct snd_kcontrol *kcontrol,
2019                             struct snd_ctl_elem_info *info)
2020 {
2021         static const char *const names[] = { "High Load", "Light Load" };
2022
2023         return snd_ctl_enum_info(info, 1, 2, names);
2024 }
2025
2026 static int roland_load_get(struct snd_kcontrol *kcontrol,
2027                            struct snd_ctl_elem_value *value)
2028 {
2029         value->value.enumerated.item[0] = kcontrol->private_value;
2030         return 0;
2031 }
2032
2033 static int roland_load_put(struct snd_kcontrol *kcontrol,
2034                            struct snd_ctl_elem_value *value)
2035 {
2036         struct snd_usb_midi *umidi = kcontrol->private_data;
2037         int changed;
2038
2039         if (value->value.enumerated.item[0] > 1)
2040                 return -EINVAL;
2041         mutex_lock(&umidi->mutex);
2042         changed = value->value.enumerated.item[0] != kcontrol->private_value;
2043         if (changed)
2044                 kcontrol->private_value = value->value.enumerated.item[0];
2045         mutex_unlock(&umidi->mutex);
2046         return changed;
2047 }
2048
2049 static const struct snd_kcontrol_new roland_load_ctl = {
2050         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2051         .name = "MIDI Input Mode",
2052         .info = roland_load_info,
2053         .get = roland_load_get,
2054         .put = roland_load_put,
2055         .private_value = 1,
2056 };
2057
2058 /*
2059  * On Roland devices, use the second alternate setting to be able to use
2060  * the interrupt input endpoint.
2061  */
2062 static void snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi *umidi)
2063 {
2064         struct usb_interface *intf;
2065         struct usb_host_interface *hostif;
2066         struct usb_interface_descriptor *intfd;
2067
2068         intf = umidi->iface;
2069         if (!intf || intf->num_altsetting != 2)
2070                 return;
2071
2072         hostif = &intf->altsetting[1];
2073         intfd = get_iface_desc(hostif);
2074        /* If either or both of the endpoints support interrupt transfer,
2075         * then use the alternate setting
2076         */
2077         if (intfd->bNumEndpoints != 2 ||
2078             !((get_endpoint(hostif, 0)->bmAttributes &
2079                USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT ||
2080               (get_endpoint(hostif, 1)->bmAttributes &
2081                USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT))
2082                 return;
2083
2084         dev_dbg(&umidi->dev->dev, "switching to altsetting %d with int ep\n",
2085                     intfd->bAlternateSetting);
2086         usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
2087                           intfd->bAlternateSetting);
2088
2089         umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi);
2090         if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0)
2091                 umidi->roland_load_ctl = NULL;
2092 }
2093
2094 /*
2095  * Try to find any usable endpoints in the interface.
2096  */
2097 static int snd_usbmidi_detect_endpoints(struct snd_usb_midi *umidi,
2098                                         struct snd_usb_midi_endpoint_info *endpoint,
2099                                         int max_endpoints)
2100 {
2101         struct usb_interface *intf;
2102         struct usb_host_interface *hostif;
2103         struct usb_interface_descriptor *intfd;
2104         struct usb_endpoint_descriptor *epd;
2105         int i, out_eps = 0, in_eps = 0;
2106
2107         if (USB_ID_VENDOR(umidi->usb_id) == 0x0582)
2108                 snd_usbmidi_switch_roland_altsetting(umidi);
2109
2110         if (endpoint[0].out_ep || endpoint[0].in_ep)
2111                 return 0;
2112
2113         intf = umidi->iface;
2114         if (!intf || intf->num_altsetting < 1)
2115                 return -ENOENT;
2116         hostif = intf->cur_altsetting;
2117         intfd = get_iface_desc(hostif);
2118
2119         for (i = 0; i < intfd->bNumEndpoints; ++i) {
2120                 epd = get_endpoint(hostif, i);
2121                 if (!usb_endpoint_xfer_bulk(epd) &&
2122                     !usb_endpoint_xfer_int(epd))
2123                         continue;
2124                 if (out_eps < max_endpoints &&
2125                     usb_endpoint_dir_out(epd)) {
2126                         endpoint[out_eps].out_ep = usb_endpoint_num(epd);
2127                         if (usb_endpoint_xfer_int(epd))
2128                                 endpoint[out_eps].out_interval = epd->bInterval;
2129                         ++out_eps;
2130                 }
2131                 if (in_eps < max_endpoints &&
2132                     usb_endpoint_dir_in(epd)) {
2133                         endpoint[in_eps].in_ep = usb_endpoint_num(epd);
2134                         if (usb_endpoint_xfer_int(epd))
2135                                 endpoint[in_eps].in_interval = epd->bInterval;
2136                         ++in_eps;
2137                 }
2138         }
2139         return (out_eps || in_eps) ? 0 : -ENOENT;
2140 }
2141
2142 /*
2143  * Detects the endpoints for one-port-per-endpoint protocols.
2144  */
2145 static int snd_usbmidi_detect_per_port_endpoints(struct snd_usb_midi *umidi,
2146                                                  struct snd_usb_midi_endpoint_info *endpoints)
2147 {
2148         int err, i;
2149
2150         err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS);
2151         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2152                 if (endpoints[i].out_ep)
2153                         endpoints[i].out_cables = 0x0001;
2154                 if (endpoints[i].in_ep)
2155                         endpoints[i].in_cables = 0x0001;
2156         }
2157         return err;
2158 }
2159
2160 /*
2161  * Detects the endpoints and ports of Yamaha devices.
2162  */
2163 static int snd_usbmidi_detect_yamaha(struct snd_usb_midi *umidi,
2164                                      struct snd_usb_midi_endpoint_info *endpoint)
2165 {
2166         struct usb_interface *intf;
2167         struct usb_host_interface *hostif;
2168         struct usb_interface_descriptor *intfd;
2169         uint8_t *cs_desc;
2170
2171         intf = umidi->iface;
2172         if (!intf)
2173                 return -ENOENT;
2174         hostif = intf->altsetting;
2175         intfd = get_iface_desc(hostif);
2176         if (intfd->bNumEndpoints < 1)
2177                 return -ENOENT;
2178
2179         /*
2180          * For each port there is one MIDI_IN/OUT_JACK descriptor, not
2181          * necessarily with any useful contents.  So simply count 'em.
2182          */
2183         for (cs_desc = hostif->extra;
2184              cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
2185              cs_desc += cs_desc[0]) {
2186                 if (cs_desc[1] == USB_DT_CS_INTERFACE) {
2187                         if (cs_desc[2] == UAC_MIDI_IN_JACK)
2188                                 endpoint->in_cables =
2189                                         (endpoint->in_cables << 1) | 1;
2190                         else if (cs_desc[2] == UAC_MIDI_OUT_JACK)
2191                                 endpoint->out_cables =
2192                                         (endpoint->out_cables << 1) | 1;
2193                 }
2194         }
2195         if (!endpoint->in_cables && !endpoint->out_cables)
2196                 return -ENOENT;
2197
2198         return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
2199 }
2200
2201 /*
2202  * Detects the endpoints and ports of Roland devices.
2203  */
2204 static int snd_usbmidi_detect_roland(struct snd_usb_midi *umidi,
2205                                      struct snd_usb_midi_endpoint_info *endpoint)
2206 {
2207         struct usb_interface *intf;
2208         struct usb_host_interface *hostif;
2209         u8 *cs_desc;
2210
2211         intf = umidi->iface;
2212         if (!intf)
2213                 return -ENOENT;
2214         hostif = intf->altsetting;
2215         /*
2216          * Some devices have a descriptor <06 24 F1 02 <inputs> <outputs>>,
2217          * some have standard class descriptors, or both kinds, or neither.
2218          */
2219         for (cs_desc = hostif->extra;
2220              cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
2221              cs_desc += cs_desc[0]) {
2222                 if (cs_desc[0] >= 6 &&
2223                     cs_desc[1] == USB_DT_CS_INTERFACE &&
2224                     cs_desc[2] == 0xf1 &&
2225                     cs_desc[3] == 0x02) {
2226                         if (cs_desc[4] > 0x10 || cs_desc[5] > 0x10)
2227                                 continue;
2228                         endpoint->in_cables  = (1 << cs_desc[4]) - 1;
2229                         endpoint->out_cables = (1 << cs_desc[5]) - 1;
2230                         return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
2231                 } else if (cs_desc[0] >= 7 &&
2232                            cs_desc[1] == USB_DT_CS_INTERFACE &&
2233                            cs_desc[2] == UAC_HEADER) {
2234                         return snd_usbmidi_get_ms_info(umidi, endpoint);
2235                 }
2236         }
2237
2238         return -ENODEV;
2239 }
2240
2241 /*
2242  * Creates the endpoints and their ports for Midiman devices.
2243  */
2244 static int snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi *umidi,
2245                                                 struct snd_usb_midi_endpoint_info *endpoint)
2246 {
2247         struct snd_usb_midi_endpoint_info ep_info;
2248         struct usb_interface *intf;
2249         struct usb_host_interface *hostif;
2250         struct usb_interface_descriptor *intfd;
2251         struct usb_endpoint_descriptor *epd;
2252         int cable, err;
2253
2254         intf = umidi->iface;
2255         if (!intf)
2256                 return -ENOENT;
2257         hostif = intf->altsetting;
2258         intfd = get_iface_desc(hostif);
2259         /*
2260          * The various MidiSport devices have more or less random endpoint
2261          * numbers, so we have to identify the endpoints by their index in
2262          * the descriptor array, like the driver for that other OS does.
2263          *
2264          * There is one interrupt input endpoint for all input ports, one
2265          * bulk output endpoint for even-numbered ports, and one for odd-
2266          * numbered ports.  Both bulk output endpoints have corresponding
2267          * input bulk endpoints (at indices 1 and 3) which aren't used.
2268          */
2269         if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) {
2270                 dev_dbg(&umidi->dev->dev, "not enough endpoints\n");
2271                 return -ENOENT;
2272         }
2273
2274         epd = get_endpoint(hostif, 0);
2275         if (!usb_endpoint_dir_in(epd) || !usb_endpoint_xfer_int(epd)) {
2276                 dev_dbg(&umidi->dev->dev, "endpoint[0] isn't interrupt\n");
2277                 return -ENXIO;
2278         }
2279         epd = get_endpoint(hostif, 2);
2280         if (!usb_endpoint_dir_out(epd) || !usb_endpoint_xfer_bulk(epd)) {
2281                 dev_dbg(&umidi->dev->dev, "endpoint[2] isn't bulk output\n");
2282                 return -ENXIO;
2283         }
2284         if (endpoint->out_cables > 0x0001) {
2285                 epd = get_endpoint(hostif, 4);
2286                 if (!usb_endpoint_dir_out(epd) ||
2287                     !usb_endpoint_xfer_bulk(epd)) {
2288                         dev_dbg(&umidi->dev->dev,
2289                                 "endpoint[4] isn't bulk output\n");
2290                         return -ENXIO;
2291                 }
2292         }
2293
2294         ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress &
2295                 USB_ENDPOINT_NUMBER_MASK;
2296         ep_info.out_interval = 0;
2297         ep_info.out_cables = endpoint->out_cables & 0x5555;
2298         err = snd_usbmidi_out_endpoint_create(umidi, &ep_info,
2299                                               &umidi->endpoints[0]);
2300         if (err < 0)
2301                 return err;
2302
2303         ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress &
2304                 USB_ENDPOINT_NUMBER_MASK;
2305         ep_info.in_interval = get_endpoint(hostif, 0)->bInterval;
2306         ep_info.in_cables = endpoint->in_cables;
2307         err = snd_usbmidi_in_endpoint_create(umidi, &ep_info,
2308                                              &umidi->endpoints[0]);
2309         if (err < 0)
2310                 return err;
2311
2312         if (endpoint->out_cables > 0x0001) {
2313                 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress &
2314                         USB_ENDPOINT_NUMBER_MASK;
2315                 ep_info.out_cables = endpoint->out_cables & 0xaaaa;
2316                 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info,
2317                                                       &umidi->endpoints[1]);
2318                 if (err < 0)
2319                         return err;
2320         }
2321
2322         for (cable = 0; cable < 0x10; ++cable) {
2323                 if (endpoint->out_cables & (1 << cable))
2324                         snd_usbmidi_init_substream(umidi,
2325                                                    SNDRV_RAWMIDI_STREAM_OUTPUT,
2326                                                    cable,
2327                                                    -1 /* prevent trying to find jack */,
2328                                                    &umidi->endpoints[cable & 1].out->ports[cable].substream);
2329                 if (endpoint->in_cables & (1 << cable))
2330                         snd_usbmidi_init_substream(umidi,
2331                                                    SNDRV_RAWMIDI_STREAM_INPUT,
2332                                                    cable,
2333                                                    -1 /* prevent trying to find jack */,
2334                                                    &umidi->endpoints[0].in->ports[cable].substream);
2335         }
2336         return 0;
2337 }
2338
2339 static const struct snd_rawmidi_global_ops snd_usbmidi_ops = {
2340         .get_port_info = snd_usbmidi_get_port_info,
2341 };
2342
2343 static int snd_usbmidi_create_rawmidi(struct snd_usb_midi *umidi,
2344                                       int out_ports, int in_ports)
2345 {
2346         struct snd_rawmidi *rmidi;
2347         int err;
2348
2349         err = snd_rawmidi_new(umidi->card, "USB MIDI",
2350                               umidi->next_midi_device++,
2351                               out_ports, in_ports, &rmidi);
2352         if (err < 0)
2353                 return err;
2354         strcpy(rmidi->name, umidi->card->shortname);
2355         rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
2356                             SNDRV_RAWMIDI_INFO_INPUT |
2357                             SNDRV_RAWMIDI_INFO_DUPLEX;
2358         rmidi->ops = &snd_usbmidi_ops;
2359         rmidi->private_data = umidi;
2360         rmidi->private_free = snd_usbmidi_rawmidi_free;
2361         snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
2362                             &snd_usbmidi_output_ops);
2363         snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
2364                             &snd_usbmidi_input_ops);
2365
2366         umidi->rmidi = rmidi;
2367         return 0;
2368 }
2369
2370 /*
2371  * Temporarily stop input.
2372  */
2373 void snd_usbmidi_input_stop(struct list_head *p)
2374 {
2375         struct snd_usb_midi *umidi;
2376         unsigned int i, j;
2377
2378         umidi = list_entry(p, struct snd_usb_midi, list);
2379         if (!umidi->input_running)
2380                 return;
2381         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2382                 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
2383                 if (ep->in)
2384                         for (j = 0; j < INPUT_URBS; ++j)
2385                                 usb_kill_urb(ep->in->urbs[j]);
2386         }
2387         umidi->input_running = 0;
2388 }
2389 EXPORT_SYMBOL(snd_usbmidi_input_stop);
2390
2391 static void snd_usbmidi_input_start_ep(struct snd_usb_midi *umidi,
2392                                        struct snd_usb_midi_in_endpoint *ep)
2393 {
2394         unsigned int i;
2395         unsigned long flags;
2396
2397         if (!ep)
2398                 return;
2399         for (i = 0; i < INPUT_URBS; ++i) {
2400                 struct urb *urb = ep->urbs[i];
2401                 spin_lock_irqsave(&umidi->disc_lock, flags);
2402                 if (!atomic_read(&urb->use_count)) {
2403                         urb->dev = ep->umidi->dev;
2404                         snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
2405                 }
2406                 spin_unlock_irqrestore(&umidi->disc_lock, flags);
2407         }
2408 }
2409
2410 /*
2411  * Resume input after a call to snd_usbmidi_input_stop().
2412  */
2413 void snd_usbmidi_input_start(struct list_head *p)
2414 {
2415         struct snd_usb_midi *umidi;
2416         int i;
2417
2418         umidi = list_entry(p, struct snd_usb_midi, list);
2419         if (umidi->input_running || !umidi->opened[1])
2420                 return;
2421         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
2422                 snd_usbmidi_input_start_ep(umidi, umidi->endpoints[i].in);
2423         umidi->input_running = 1;
2424 }
2425 EXPORT_SYMBOL(snd_usbmidi_input_start);
2426
2427 /*
2428  * Prepare for suspend. Typically called from the USB suspend callback.
2429  */
2430 void snd_usbmidi_suspend(struct list_head *p)
2431 {
2432         struct snd_usb_midi *umidi;
2433
2434         umidi = list_entry(p, struct snd_usb_midi, list);
2435         mutex_lock(&umidi->mutex);
2436         snd_usbmidi_input_stop(p);
2437         mutex_unlock(&umidi->mutex);
2438 }
2439 EXPORT_SYMBOL(snd_usbmidi_suspend);
2440
2441 /*
2442  * Resume. Typically called from the USB resume callback.
2443  */
2444 void snd_usbmidi_resume(struct list_head *p)
2445 {
2446         struct snd_usb_midi *umidi;
2447
2448         umidi = list_entry(p, struct snd_usb_midi, list);
2449         mutex_lock(&umidi->mutex);
2450         snd_usbmidi_input_start(p);
2451         mutex_unlock(&umidi->mutex);
2452 }
2453 EXPORT_SYMBOL(snd_usbmidi_resume);
2454
2455 /*
2456  * Creates and registers everything needed for a MIDI streaming interface.
2457  */
2458 int __snd_usbmidi_create(struct snd_card *card,
2459                          struct usb_interface *iface,
2460                          struct list_head *midi_list,
2461                          const struct snd_usb_audio_quirk *quirk,
2462                          unsigned int usb_id)
2463 {
2464         struct snd_usb_midi *umidi;
2465         struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS];
2466         int out_ports, in_ports;
2467         int i, err;
2468
2469         umidi = kzalloc(sizeof(*umidi), GFP_KERNEL);
2470         if (!umidi)
2471                 return -ENOMEM;
2472         umidi->dev = interface_to_usbdev(iface);
2473         umidi->card = card;
2474         umidi->iface = iface;
2475         umidi->quirk = quirk;
2476         umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
2477         spin_lock_init(&umidi->disc_lock);
2478         init_rwsem(&umidi->disc_rwsem);
2479         mutex_init(&umidi->mutex);
2480         if (!usb_id)
2481                 usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor),
2482                                le16_to_cpu(umidi->dev->descriptor.idProduct));
2483         umidi->usb_id = usb_id;
2484         timer_setup(&umidi->error_timer, snd_usbmidi_error_timer, 0);
2485
2486         /* detect the endpoint(s) to use */
2487         memset(endpoints, 0, sizeof(endpoints));
2488         switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) {
2489         case QUIRK_MIDI_STANDARD_INTERFACE:
2490                 err = snd_usbmidi_get_ms_info(umidi, endpoints);
2491                 if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */
2492                         umidi->usb_protocol_ops =
2493                                 &snd_usbmidi_maudio_broken_running_status_ops;
2494                 break;
2495         case QUIRK_MIDI_US122L:
2496                 umidi->usb_protocol_ops = &snd_usbmidi_122l_ops;
2497                 fallthrough;
2498         case QUIRK_MIDI_FIXED_ENDPOINT:
2499                 memcpy(&endpoints[0], quirk->data,
2500                        sizeof(struct snd_usb_midi_endpoint_info));
2501                 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2502                 break;
2503         case QUIRK_MIDI_YAMAHA:
2504                 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]);
2505                 break;
2506         case QUIRK_MIDI_ROLAND:
2507                 err = snd_usbmidi_detect_roland(umidi, &endpoints[0]);
2508                 break;
2509         case QUIRK_MIDI_MIDIMAN:
2510                 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
2511                 memcpy(&endpoints[0], quirk->data,
2512                        sizeof(struct snd_usb_midi_endpoint_info));
2513                 err = 0;
2514                 break;
2515         case QUIRK_MIDI_NOVATION:
2516                 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
2517                 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2518                 break;
2519         case QUIRK_MIDI_RAW_BYTES:
2520                 umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;
2521                 /*
2522                  * Interface 1 contains isochronous endpoints, but with the same
2523                  * numbers as in interface 0.  Since it is interface 1 that the
2524                  * USB core has most recently seen, these descriptors are now
2525                  * associated with the endpoint numbers.  This will foul up our
2526                  * attempts to submit bulk/interrupt URBs to the endpoints in
2527                  * interface 0, so we have to make sure that the USB core looks
2528                  * again at interface 0 by calling usb_set_interface() on it.
2529                  */
2530                 if (umidi->usb_id == USB_ID(0x07fd, 0x0001)) /* MOTU Fastlane */
2531                         usb_set_interface(umidi->dev, 0, 0);
2532                 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2533                 break;
2534         case QUIRK_MIDI_EMAGIC:
2535                 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops;
2536                 memcpy(&endpoints[0], quirk->data,
2537                        sizeof(struct snd_usb_midi_endpoint_info));
2538                 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2539                 break;
2540         case QUIRK_MIDI_CME:
2541                 umidi->usb_protocol_ops = &snd_usbmidi_cme_ops;
2542                 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2543                 break;
2544         case QUIRK_MIDI_AKAI:
2545                 umidi->usb_protocol_ops = &snd_usbmidi_akai_ops;
2546                 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2547                 /* endpoint 1 is input-only */
2548                 endpoints[1].out_cables = 0;
2549                 break;
2550         case QUIRK_MIDI_FTDI:
2551                 umidi->usb_protocol_ops = &snd_usbmidi_ftdi_ops;
2552
2553                 /* set baud rate to 31250 (48 MHz / 16 / 96) */
2554                 err = usb_control_msg(umidi->dev, usb_sndctrlpipe(umidi->dev, 0),
2555                                       3, 0x40, 0x60, 0, NULL, 0, 1000);
2556                 if (err < 0)
2557                         break;
2558
2559                 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2560                 break;
2561         case QUIRK_MIDI_CH345:
2562                 umidi->usb_protocol_ops = &snd_usbmidi_ch345_broken_sysex_ops;
2563                 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2564                 break;
2565         default:
2566                 dev_err(&umidi->dev->dev, "invalid quirk type %d\n",
2567                         quirk->type);
2568                 err = -ENXIO;
2569                 break;
2570         }
2571         if (err < 0)
2572                 goto free_midi;
2573
2574         /* create rawmidi device */
2575         out_ports = 0;
2576         in_ports = 0;
2577         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2578                 out_ports += hweight16(endpoints[i].out_cables);
2579                 in_ports += hweight16(endpoints[i].in_cables);
2580         }
2581         err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports);
2582         if (err < 0)
2583                 goto free_midi;
2584
2585         /* create endpoint/port structures */
2586         if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN)
2587                 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]);
2588         else
2589                 err = snd_usbmidi_create_endpoints(umidi, endpoints);
2590         if (err < 0)
2591                 goto exit;
2592
2593         usb_autopm_get_interface_no_resume(umidi->iface);
2594
2595         list_add_tail(&umidi->list, midi_list);
2596         return 0;
2597
2598 free_midi:
2599         kfree(umidi);
2600 exit:
2601         return err;
2602 }
2603 EXPORT_SYMBOL(__snd_usbmidi_create);