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/module.h>
  51
  52 #include <sound/core.h>
  53 #include <sound/control.h>
  54 #include <sound/rawmidi.h>
  55 #include <sound/asequencer.h>
  56 #include "usbaudio.h"
  57 #include "midi.h"
  58 #include "power.h"
  59 #include "helper.h"
  60
  61 /*
  62  * define this to log all USB packets
  63  */
  64 /* #define DUMP_PACKETS */
  65
  66 /*
  67  * how long to wait after some USB errors, so that hub_wq can disconnect() us
  68  * without too many spurious errors
  69  */
  70 #define ERROR_DELAY_JIFFIES (HZ / 10)
  71
  72 #define OUTPUT_URBS 7
  73 #define INPUT_URBS 7
  74
  75
  76 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
  77 MODULE_DESCRIPTION("USB Audio/MIDI helper module");
  78 MODULE_LICENSE("Dual BSD/GPL");
  79
  80
  81 struct usb_ms_header_descriptor {
  82         __u8  bLength;
  83         __u8  bDescriptorType;
  84         __u8  bDescriptorSubtype;
  85         __u8  bcdMSC[2];
  86         __le16 wTotalLength;
  87 } __attribute__ ((packed));
  88
  89 struct usb_ms_endpoint_descriptor {
  90         __u8  bLength;
  91         __u8  bDescriptorType;
  92         __u8  bDescriptorSubtype;
  93         __u8  bNumEmbMIDIJack;
  94         __u8  baAssocJackID[0];
  95 } __attribute__ ((packed));
  96
  97 struct snd_usb_midi_in_endpoint;
  98 struct snd_usb_midi_out_endpoint;
  99 struct snd_usb_midi_endpoint;
 100
 101 struct usb_protocol_ops {
 102         void (*input)(struct snd_usb_midi_in_endpoint*, uint8_t*, int);
 103         void (*output)(struct snd_usb_midi_out_endpoint *ep, struct urb *urb);
 104         void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t);
 105         void (*init_out_endpoint)(struct snd_usb_midi_out_endpoint *);
 106         void (*finish_out_endpoint)(struct snd_usb_midi_out_endpoint *);
 107 };
 108
 109 struct snd_usb_midi {
 110         struct usb_device *dev;
 111         struct snd_card *card;
 112         struct usb_interface *iface;
 113         const struct snd_usb_audio_quirk *quirk;
 114         struct snd_rawmidi *rmidi;
 115         const struct usb_protocol_ops *usb_protocol_ops;
 116         struct list_head list;
 117         struct timer_list error_timer;
 118         spinlock_t disc_lock;
 119         struct rw_semaphore disc_rwsem;
 120         struct mutex mutex;
 121         u32 usb_id;
 122         int next_midi_device;
 123
 124         struct snd_usb_midi_endpoint {
 125                 struct snd_usb_midi_out_endpoint *out;
 126                 struct snd_usb_midi_in_endpoint *in;
 127         } endpoints[MIDI_MAX_ENDPOINTS];
 128         unsigned long input_triggered;
 129         unsigned int opened[2];
 130         unsigned char disconnected;
 131         unsigned char input_running;
 132
 133         struct snd_kcontrol *roland_load_ctl;
 134 };
 135
 136 struct snd_usb_midi_out_endpoint {
 137         struct snd_usb_midi *umidi;
 138         struct out_urb_context {
 139                 struct urb *urb;
 140                 struct snd_usb_midi_out_endpoint *ep;
 141         } urbs[OUTPUT_URBS];
 142         unsigned int active_urbs;
 143         unsigned int drain_urbs;
 144         int max_transfer;               /* size of urb buffer */
 145         struct tasklet_struct tasklet;
 146         unsigned int next_urb;
 147         spinlock_t buffer_lock;
 148
 149         struct usbmidi_out_port {
 150                 struct snd_usb_midi_out_endpoint *ep;
 151                 struct snd_rawmidi_substream *substream;
 152                 int active;
 153                 uint8_t cable;          /* cable number << 4 */
 154                 uint8_t state;
 155 #define STATE_UNKNOWN   0
 156 #define STATE_1PARAM    1
 157 #define STATE_2PARAM_1  2
 158 #define STATE_2PARAM_2  3
 159 #define STATE_SYSEX_0   4
 160 #define STATE_SYSEX_1   5
 161 #define STATE_SYSEX_2   6
 162                 uint8_t data[2];
 163         } ports[0x10];
 164         int current_port;
 165
 166         wait_queue_head_t drain_wait;
 167 };
 168
 169 struct snd_usb_midi_in_endpoint {
 170         struct snd_usb_midi *umidi;
 171         struct urb *urbs[INPUT_URBS];
 172         struct usbmidi_in_port {
 173                 struct snd_rawmidi_substream *substream;
 174                 u8 running_status_length;
 175         } ports[0x10];
 176         u8 seen_f5;
 177         bool in_sysex;
 178         u8 last_cin;
 179         u8 error_resubmit;
 180         int current_port;
 181 };
 182
 183 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep);
 184
 185 static const uint8_t snd_usbmidi_cin_length[] = {
 186         0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
 187 };
 188
 189 /*
 190  * Submits the URB, with error handling.
 191  */
 192 static int snd_usbmidi_submit_urb(struct urb *urb, gfp_t flags)
 193 {
 194         int err = usb_submit_urb(urb, flags);
 195         if (err < 0 && err != -ENODEV)
 196                 dev_err(&urb->dev->dev, "usb_submit_urb: %d\n", err);
 197         return err;
 198 }
 199
 200 /*
 201  * Error handling for URB completion functions.
 202  */
 203 static int snd_usbmidi_urb_error(const struct urb *urb)
 204 {
 205         switch (urb->status) {
 206         /* manually unlinked, or device gone */
 207         case -ENOENT:
 208         case -ECONNRESET:
 209         case -ESHUTDOWN:
 210         case -ENODEV:
 211                 return -ENODEV;
 212         /* errors that might occur during unplugging */
 213         case -EPROTO:
 214         case -ETIME:
 215         case -EILSEQ:
 216                 return -EIO;
 217         default:
 218                 dev_err(&urb->dev->dev, "urb status %d\n", urb->status);
 219                 return 0; /* continue */
 220         }
 221 }
 222
 223 /*
 224  * Receives a chunk of MIDI data.
 225  */
 226 static void snd_usbmidi_input_data(struct snd_usb_midi_in_endpoint *ep,
 227                                    int portidx, uint8_t *data, int length)
 228 {
 229         struct usbmidi_in_port *port = &ep->ports[portidx];
 230
 231         if (!port->substream) {
 232                 dev_dbg(&ep->umidi->dev->dev, "unexpected port %d!\n", portidx);
 233                 return;
 234         }
 235         if (!test_bit(port->substream->number, &ep->umidi->input_triggered))
 236                 return;
 237         snd_rawmidi_receive(port->substream, data, length);
 238 }
 239
 240 #ifdef DUMP_PACKETS
 241 static void dump_urb(const char *type, const u8 *data, int length)
 242 {
 243         snd_printk(KERN_DEBUG "%s packet: [", type);
 244         for (; length > 0; ++data, --length)
 245                 printk(KERN_CONT " %02x", *data);
 246         printk(KERN_CONT " ]\n");
 247 }
 248 #else
 249 #define dump_urb(type, data, length) /* nothing */
 250 #endif
 251
 252 /*
 253  * Processes the data read from the device.
 254  */
 255 static void snd_usbmidi_in_urb_complete(struct urb *urb)
 256 {
 257         struct snd_usb_midi_in_endpoint *ep = urb->context;
 258
 259         if (urb->status == 0) {
 260                 dump_urb("received", urb->transfer_buffer, urb->actual_length);
 261                 ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer,
 262                                                    urb->actual_length);
 263         } else {
 264                 int err = snd_usbmidi_urb_error(urb);
 265                 if (err < 0) {
 266                         if (err != -ENODEV) {
 267                                 ep->error_resubmit = 1;
 268                                 mod_timer(&ep->umidi->error_timer,
 269                                           jiffies + ERROR_DELAY_JIFFIES);
 270                         }
 271                         return;
 272                 }
 273         }
 274
 275         urb->dev = ep->umidi->dev;
 276         snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
 277 }
 278
 279 static void snd_usbmidi_out_urb_complete(struct urb *urb)
 280 {
 281         struct out_urb_context *context = urb->context;
 282         struct snd_usb_midi_out_endpoint *ep = context->ep;
 283         unsigned int urb_index;
 284
 285         spin_lock(&ep->buffer_lock);
 286         urb_index = context - ep->urbs;
 287         ep->active_urbs &= ~(1 << urb_index);
 288         if (unlikely(ep->drain_urbs)) {
 289                 ep->drain_urbs &= ~(1 << urb_index);
 290                 wake_up(&ep->drain_wait);
 291         }
 292         spin_unlock(&ep->buffer_lock);
 293         if (urb->status < 0) {
 294                 int err = snd_usbmidi_urb_error(urb);
 295                 if (err < 0) {
 296                         if (err != -ENODEV)
 297                                 mod_timer(&ep->umidi->error_timer,
 298                                           jiffies + ERROR_DELAY_JIFFIES);
 299                         return;
 300                 }
 301         }
 302         snd_usbmidi_do_output(ep);
 303 }
 304
 305 /*
 306  * This is called when some data should be transferred to the device
 307  * (from one or more substreams).
 308  */
 309 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep)
 310 {
 311         unsigned int urb_index;
 312         struct urb *urb;
 313         unsigned long flags;
 314
 315         spin_lock_irqsave(&ep->buffer_lock, flags);
 316         if (ep->umidi->disconnected) {
 317                 spin_unlock_irqrestore(&ep->buffer_lock, flags);
 318                 return;
 319         }
 320
 321         urb_index = ep->next_urb;
 322         for (;;) {
 323                 if (!(ep->active_urbs & (1 << urb_index))) {
 324                         urb = ep->urbs[urb_index].urb;
 325                         urb->transfer_buffer_length = 0;
 326                         ep->umidi->usb_protocol_ops->output(ep, urb);
 327                         if (urb->transfer_buffer_length == 0)
 328                                 break;
 329
 330                         dump_urb("sending", urb->transfer_buffer,
 331                                  urb->transfer_buffer_length);
 332                         urb->dev = ep->umidi->dev;
 333                         if (snd_usbmidi_submit_urb(urb, GFP_ATOMIC) < 0)
 334                                 break;
 335                         ep->active_urbs |= 1 << urb_index;
 336                 }
 337                 if (++urb_index >= OUTPUT_URBS)
 338                         urb_index = 0;
 339                 if (urb_index == ep->next_urb)
 340                         break;
 341         }
 342         ep->next_urb = urb_index;
 343         spin_unlock_irqrestore(&ep->buffer_lock, flags);
 344 }
 345
 346 static void snd_usbmidi_out_tasklet(unsigned long data)
 347 {
 348         struct snd_usb_midi_out_endpoint *ep =
 349                 (struct snd_usb_midi_out_endpoint *) data;
 350
 351         snd_usbmidi_do_output(ep);
 352 }
 353
 354 /* called after transfers had been interrupted due to some USB error */
 355 static void snd_usbmidi_error_timer(unsigned long data)
 356 {
 357         struct snd_usb_midi *umidi = (struct snd_usb_midi *)data;
 358         unsigned int i, j;
 359
 360         spin_lock(&umidi->disc_lock);
 361         if (umidi->disconnected) {
 362                 spin_unlock(&umidi->disc_lock);
 363                 return;
 364         }
 365         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
 366                 struct snd_usb_midi_in_endpoint *in = umidi->endpoints[i].in;
 367                 if (in && in->error_resubmit) {
 368                         in->error_resubmit = 0;
 369                         for (j = 0; j < INPUT_URBS; ++j) {
 370                                 if (atomic_read(&in->urbs[j]->use_count))
 371                                         continue;
 372                                 in->urbs[j]->dev = umidi->dev;
 373                                 snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC);
 374                         }
 375                 }
 376                 if (umidi->endpoints[i].out)
 377                         snd_usbmidi_do_output(umidi->endpoints[i].out);
 378         }
 379         spin_unlock(&umidi->disc_lock);
 380 }
 381
 382 /* helper function to send static data that may not DMA-able */
 383 static int send_bulk_static_data(struct snd_usb_midi_out_endpoint *ep,
 384                                  const void *data, int len)
 385 {
 386         int err = 0;
 387         void *buf = kmemdup(data, len, GFP_KERNEL);
 388         if (!buf)
 389                 return -ENOMEM;
 390         dump_urb("sending", buf, len);
 391         if (ep->urbs[0].urb)
 392                 err = usb_bulk_msg(ep->umidi->dev, ep->urbs[0].urb->pipe,
 393                                    buf, len, NULL, 250);
 394         kfree(buf);
 395         return err;
 396 }
 397
 398 /*
 399  * Standard USB MIDI protocol: see the spec.
 400  * Midiman protocol: like the standard protocol, but the control byte is the
 401  * fourth byte in each packet, and uses length instead of CIN.
 402  */
 403
 404 static void snd_usbmidi_standard_input(struct snd_usb_midi_in_endpoint *ep,
 405                                        uint8_t *buffer, int buffer_length)
 406 {
 407         int i;
 408
 409         for (i = 0; i + 3 < buffer_length; i += 4)
 410                 if (buffer[i] != 0) {
 411                         int cable = buffer[i] >> 4;
 412                         int length = snd_usbmidi_cin_length[buffer[i] & 0x0f];
 413                         snd_usbmidi_input_data(ep, cable, &buffer[i + 1],
 414                                                length);
 415                 }
 416 }
 417
 418 static void snd_usbmidi_midiman_input(struct snd_usb_midi_in_endpoint *ep,
 419                                       uint8_t *buffer, int buffer_length)
 420 {
 421         int i;
 422
 423         for (i = 0; i + 3 < buffer_length; i += 4)
 424                 if (buffer[i + 3] != 0) {
 425                         int port = buffer[i + 3] >> 4;
 426                         int length = buffer[i + 3] & 3;
 427                         snd_usbmidi_input_data(ep, port, &buffer[i], length);
 428                 }
 429 }
 430
 431 /*
 432  * Buggy M-Audio device: running status on input results in a packet that has
 433  * the data bytes but not the status byte and that is marked with CIN 4.
 434  */
 435 static void snd_usbmidi_maudio_broken_running_status_input(
 436                                         struct snd_usb_midi_in_endpoint *ep,
 437                                         uint8_t *buffer, int buffer_length)
 438 {
 439         int i;
 440
 441         for (i = 0; i + 3 < buffer_length; i += 4)
 442                 if (buffer[i] != 0) {
 443                         int cable = buffer[i] >> 4;
 444                         u8 cin = buffer[i] & 0x0f;
 445                         struct usbmidi_in_port *port = &ep->ports[cable];
 446                         int length;
 447
 448                         length = snd_usbmidi_cin_length[cin];
 449                         if (cin == 0xf && buffer[i + 1] >= 0xf8)
 450                                 ; /* realtime msg: no running status change */
 451                         else if (cin >= 0x8 && cin <= 0xe)
 452                                 /* channel msg */
 453                                 port->running_status_length = length - 1;
 454                         else if (cin == 0x4 &&
 455                                  port->running_status_length != 0 &&
 456                                  buffer[i + 1] < 0x80)
 457                                 /* CIN 4 that is not a SysEx */
 458                                 length = port->running_status_length;
 459                         else
 460                                 /*
 461                                  * All other msgs cannot begin running status.
 462                                  * (A channel msg sent as two or three CIN 0xF
 463                                  * packets could in theory, but this device
 464                                  * doesn't use this format.)
 465                                  */
 466                                 port->running_status_length = 0;
 467                         snd_usbmidi_input_data(ep, cable, &buffer[i + 1],
 468                                                length);
 469                 }
 470 }
 471
 472 /*
 473  * QinHeng CH345 is buggy: every second packet inside a SysEx has not CIN 4
 474  * but the previously seen CIN, but still with three data bytes.
 475  */
 476 static void ch345_broken_sysex_input(struct snd_usb_midi_in_endpoint *ep,
 477                                      uint8_t *buffer, int buffer_length)
 478 {
 479         unsigned int i, cin, length;
 480
 481         for (i = 0; i + 3 < buffer_length; i += 4) {
 482                 if (buffer[i] == 0 && i > 0)
 483                         break;
 484                 cin = buffer[i] & 0x0f;
 485                 if (ep->in_sysex &&
 486                     cin == ep->last_cin &&
 487                     (buffer[i + 1 + (cin == 0x6)] & 0x80) == 0)
 488                         cin = 0x4;
 489 #if 0
 490                 if (buffer[i + 1] == 0x90) {
 491                         /*
 492                          * Either a corrupted running status or a real note-on
 493                          * message; impossible to detect reliably.
 494                          */
 495                 }
 496 #endif
 497                 length = snd_usbmidi_cin_length[cin];
 498                 snd_usbmidi_input_data(ep, 0, &buffer[i + 1], length);
 499                 ep->in_sysex = cin == 0x4;
 500                 if (!ep->in_sysex)
 501                         ep->last_cin = cin;
 502         }
 503 }
 504
 505 /*
 506  * CME protocol: like the standard protocol, but SysEx commands are sent as a
 507  * single USB packet preceded by a 0x0F byte.
 508  */
 509 static void snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint *ep,
 510                                   uint8_t *buffer, int buffer_length)
 511 {
 512         if (buffer_length < 2 || (buffer[0] & 0x0f) != 0x0f)
 513                 snd_usbmidi_standard_input(ep, buffer, buffer_length);
 514         else
 515                 snd_usbmidi_input_data(ep, buffer[0] >> 4,
 516                                        &buffer[1], buffer_length - 1);
 517 }
 518
 519 /*
 520  * Adds one USB MIDI packet to the output buffer.
 521  */
 522 static void snd_usbmidi_output_standard_packet(struct urb *urb, uint8_t p0,
 523                                                uint8_t p1, uint8_t p2,
 524                                                uint8_t p3)
 525 {
 526
 527         uint8_t *buf =
 528                 (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length;
 529         buf[0] = p0;
 530         buf[1] = p1;
 531         buf[2] = p2;
 532         buf[3] = p3;
 533         urb->transfer_buffer_length += 4;
 534 }
 535
 536 /*
 537  * Adds one Midiman packet to the output buffer.
 538  */
 539 static void snd_usbmidi_output_midiman_packet(struct urb *urb, uint8_t p0,
 540                                               uint8_t p1, uint8_t p2,
 541                                               uint8_t p3)
 542 {
 543
 544         uint8_t *buf =
 545                 (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length;
 546         buf[0] = p1;
 547         buf[1] = p2;
 548         buf[2] = p3;
 549         buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f];
 550         urb->transfer_buffer_length += 4;
 551 }
 552
 553 /*
 554  * Converts MIDI commands to USB MIDI packets.
 555  */
 556 static void snd_usbmidi_transmit_byte(struct usbmidi_out_port *port,
 557                                       uint8_t b, struct urb *urb)
 558 {
 559         uint8_t p0 = port->cable;
 560         void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) =
 561                 port->ep->umidi->usb_protocol_ops->output_packet;
 562
 563         if (b >= 0xf8) {
 564                 output_packet(urb, p0 | 0x0f, b, 0, 0);
 565         } else if (b >= 0xf0) {
 566                 switch (b) {
 567                 case 0xf0:
 568                         port->data[0] = b;
 569                         port->state = STATE_SYSEX_1;
 570                         break;
 571                 case 0xf1:
 572                 case 0xf3:
 573                         port->data[0] = b;
 574                         port->state = STATE_1PARAM;
 575                         break;
 576                 case 0xf2:
 577                         port->data[0] = b;
 578                         port->state = STATE_2PARAM_1;
 579                         break;
 580                 case 0xf4:
 581                 case 0xf5:
 582                         port->state = STATE_UNKNOWN;
 583                         break;
 584                 case 0xf6:
 585                         output_packet(urb, p0 | 0x05, 0xf6, 0, 0);
 586                         port->state = STATE_UNKNOWN;
 587                         break;
 588                 case 0xf7:
 589                         switch (port->state) {
 590                         case STATE_SYSEX_0:
 591                                 output_packet(urb, p0 | 0x05, 0xf7, 0, 0);
 592                                 break;
 593                         case STATE_SYSEX_1:
 594                                 output_packet(urb, p0 | 0x06, port->data[0],
 595                                               0xf7, 0);
 596                                 break;
 597                         case STATE_SYSEX_2:
 598                                 output_packet(urb, p0 | 0x07, port->data[0],
 599                                               port->data[1], 0xf7);
 600                                 break;
 601                         }
 602                         port->state = STATE_UNKNOWN;
 603                         break;
 604                 }
 605         } else if (b >= 0x80) {
 606                 port->data[0] = b;
 607                 if (b >= 0xc0 && b <= 0xdf)
 608                         port->state = STATE_1PARAM;
 609                 else
 610                         port->state = STATE_2PARAM_1;
 611         } else { /* b < 0x80 */
 612                 switch (port->state) {
 613                 case STATE_1PARAM:
 614                         if (port->data[0] < 0xf0) {
 615                                 p0 |= port->data[0] >> 4;
 616                         } else {
 617                                 p0 |= 0x02;
 618                                 port->state = STATE_UNKNOWN;
 619                         }
 620                         output_packet(urb, p0, port->data[0], b, 0);
 621                         break;
 622                 case STATE_2PARAM_1:
 623                         port->data[1] = b;
 624                         port->state = STATE_2PARAM_2;
 625                         break;
 626                 case STATE_2PARAM_2:
 627                         if (port->data[0] < 0xf0) {
 628                                 p0 |= port->data[0] >> 4;
 629                                 port->state = STATE_2PARAM_1;
 630                         } else {
 631                                 p0 |= 0x03;
 632                                 port->state = STATE_UNKNOWN;
 633                         }
 634                         output_packet(urb, p0, port->data[0], port->data[1], b);
 635                         break;
 636                 case STATE_SYSEX_0:
 637                         port->data[0] = b;
 638                         port->state = STATE_SYSEX_1;
 639                         break;
 640                 case STATE_SYSEX_1:
 641                         port->data[1] = b;
 642                         port->state = STATE_SYSEX_2;
 643                         break;
 644                 case STATE_SYSEX_2:
 645                         output_packet(urb, p0 | 0x04, port->data[0],
 646                                       port->data[1], b);
 647                         port->state = STATE_SYSEX_0;
 648                         break;
 649                 }
 650         }
 651 }
 652
 653 static void snd_usbmidi_standard_output(struct snd_usb_midi_out_endpoint *ep,
 654                                         struct urb *urb)
 655 {
 656         int p;
 657
 658         /* FIXME: lower-numbered ports can starve higher-numbered ports */
 659         for (p = 0; p < 0x10; ++p) {
 660                 struct usbmidi_out_port *port = &ep->ports[p];
 661                 if (!port->active)
 662                         continue;
 663                 while (urb->transfer_buffer_length + 3 < ep->max_transfer) {
 664                         uint8_t b;
 665                         if (snd_rawmidi_transmit(port->substream, &b, 1) != 1) {
 666                                 port->active = 0;
 667                                 break;
 668                         }
 669                         snd_usbmidi_transmit_byte(port, b, urb);
 670                 }
 671         }
 672 }
 673
 674 static const struct usb_protocol_ops snd_usbmidi_standard_ops = {
 675         .input = snd_usbmidi_standard_input,
 676         .output = snd_usbmidi_standard_output,
 677         .output_packet = snd_usbmidi_output_standard_packet,
 678 };
 679
 680 static const struct usb_protocol_ops snd_usbmidi_midiman_ops = {
 681         .input = snd_usbmidi_midiman_input,
 682         .output = snd_usbmidi_standard_output,
 683         .output_packet = snd_usbmidi_output_midiman_packet,
 684 };
 685
 686 static const
 687 struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = {
 688         .input = snd_usbmidi_maudio_broken_running_status_input,
 689         .output = snd_usbmidi_standard_output,
 690         .output_packet = snd_usbmidi_output_standard_packet,
 691 };
 692
 693 static const struct usb_protocol_ops snd_usbmidi_cme_ops = {
 694         .input = snd_usbmidi_cme_input,
 695         .output = snd_usbmidi_standard_output,
 696         .output_packet = snd_usbmidi_output_standard_packet,
 697 };
 698
 699 static const struct usb_protocol_ops snd_usbmidi_ch345_broken_sysex_ops = {
 700         .input = ch345_broken_sysex_input,
 701         .output = snd_usbmidi_standard_output,
 702         .output_packet = snd_usbmidi_output_standard_packet,
 703 };
 704
 705 /*
 706  * AKAI MPD16 protocol:
 707  *
 708  * For control port (endpoint 1):
 709  * ==============================
 710  * One or more chunks consisting of first byte of (0x10 | msg_len) and then a
 711  * SysEx message (msg_len=9 bytes long).
 712  *
 713  * For data port (endpoint 2):
 714  * ===========================
 715  * One or more chunks consisting of first byte of (0x20 | msg_len) and then a
 716  * MIDI message (msg_len bytes long)
 717  *
 718  * Messages sent: Active Sense, Note On, Poly Pressure, Control Change.
 719  */
 720 static void snd_usbmidi_akai_input(struct snd_usb_midi_in_endpoint *ep,
 721                                    uint8_t *buffer, int buffer_length)
 722 {
 723         unsigned int pos = 0;
 724         unsigned int len = (unsigned int)buffer_length;
 725         while (pos < len) {
 726                 unsigned int port = (buffer[pos] >> 4) - 1;
 727                 unsigned int msg_len = buffer[pos] & 0x0f;
 728                 pos++;
 729                 if (pos + msg_len <= len && port < 2)
 730                         snd_usbmidi_input_data(ep, 0, &buffer[pos], msg_len);
 731                 pos += msg_len;
 732         }
 733 }
 734
 735 #define MAX_AKAI_SYSEX_LEN 9
 736
 737 static void snd_usbmidi_akai_output(struct snd_usb_midi_out_endpoint *ep,
 738                                     struct urb *urb)
 739 {
 740         uint8_t *msg;
 741         int pos, end, count, buf_end;
 742         uint8_t tmp[MAX_AKAI_SYSEX_LEN];
 743         struct snd_rawmidi_substream *substream = ep->ports[0].substream;
 744
 745         if (!ep->ports[0].active)
 746                 return;
 747
 748         msg = urb->transfer_buffer + urb->transfer_buffer_length;
 749         buf_end = ep->max_transfer - MAX_AKAI_SYSEX_LEN - 1;
 750
 751         /* only try adding more data when there's space for at least 1 SysEx */
 752         while (urb->transfer_buffer_length < buf_end) {
 753                 count = snd_rawmidi_transmit_peek(substream,
 754                                                   tmp, MAX_AKAI_SYSEX_LEN);
 755                 if (!count) {
 756                         ep->ports[0].active = 0;
 757                         return;
 758                 }
 759                 /* try to skip non-SysEx data */
 760                 for (pos = 0; pos < count && tmp[pos] != 0xF0; pos++)
 761                         ;
 762
 763                 if (pos > 0) {
 764                         snd_rawmidi_transmit_ack(substream, pos);
 765                         continue;
 766                 }
 767
 768                 /* look for the start or end marker */
 769                 for (end = 1; end < count && tmp[end] < 0xF0; end++)
 770                         ;
 771
 772                 /* next SysEx started before the end of current one */
 773                 if (end < count && tmp[end] == 0xF0) {
 774                         /* it's incomplete - drop it */
 775                         snd_rawmidi_transmit_ack(substream, end);
 776                         continue;
 777                 }
 778                 /* SysEx complete */
 779                 if (end < count && tmp[end] == 0xF7) {
 780                         /* queue it, ack it, and get the next one */
 781                         count = end + 1;
 782                         msg[0] = 0x10 | count;
 783                         memcpy(&msg[1], tmp, count);
 784                         snd_rawmidi_transmit_ack(substream, count);
 785                         urb->transfer_buffer_length += count + 1;
 786                         msg += count + 1;
 787                         continue;
 788                 }
 789                 /* less than 9 bytes and no end byte - wait for more */
 790                 if (count < MAX_AKAI_SYSEX_LEN) {
 791                         ep->ports[0].active = 0;
 792                         return;
 793                 }
 794                 /* 9 bytes and no end marker in sight - malformed, skip it */
 795                 snd_rawmidi_transmit_ack(substream, count);
 796         }
 797 }
 798
 799 static const struct usb_protocol_ops snd_usbmidi_akai_ops = {
 800         .input = snd_usbmidi_akai_input,
 801         .output = snd_usbmidi_akai_output,
 802 };
 803
 804 /*
 805  * Novation USB MIDI protocol: number of data bytes is in the first byte
 806  * (when receiving) (+1!) or in the second byte (when sending); data begins
 807  * at the third byte.
 808  */
 809
 810 static void snd_usbmidi_novation_input(struct snd_usb_midi_in_endpoint *ep,
 811                                        uint8_t *buffer, int buffer_length)
 812 {
 813         if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1)
 814                 return;
 815         snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1);
 816 }
 817
 818 static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint *ep,
 819                                         struct urb *urb)
 820 {
 821         uint8_t *transfer_buffer;
 822         int count;
 823
 824         if (!ep->ports[0].active)
 825                 return;
 826         transfer_buffer = urb->transfer_buffer;
 827         count = snd_rawmidi_transmit(ep->ports[0].substream,
 828                                      &transfer_buffer[2],
 829                                      ep->max_transfer - 2);
 830         if (count < 1) {
 831                 ep->ports[0].active = 0;
 832                 return;
 833         }
 834         transfer_buffer[0] = 0;
 835         transfer_buffer[1] = count;
 836         urb->transfer_buffer_length = 2 + count;
 837 }
 838
 839 static const struct usb_protocol_ops snd_usbmidi_novation_ops = {
 840         .input = snd_usbmidi_novation_input,
 841         .output = snd_usbmidi_novation_output,
 842 };
 843
 844 /*
 845  * "raw" protocol: just move raw MIDI bytes from/to the endpoint
 846  */
 847
 848 static void snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint *ep,
 849                                   uint8_t *buffer, int buffer_length)
 850 {
 851         snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
 852 }
 853
 854 static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint *ep,
 855                                    struct urb *urb)
 856 {
 857         int count;
 858
 859         if (!ep->ports[0].active)
 860                 return;
 861         count = snd_rawmidi_transmit(ep->ports[0].substream,
 862                                      urb->transfer_buffer,
 863                                      ep->max_transfer);
 864         if (count < 1) {
 865                 ep->ports[0].active = 0;
 866                 return;
 867         }
 868         urb->transfer_buffer_length = count;
 869 }
 870
 871 static const struct usb_protocol_ops snd_usbmidi_raw_ops = {
 872         .input = snd_usbmidi_raw_input,
 873         .output = snd_usbmidi_raw_output,
 874 };
 875
 876 /*
 877  * FTDI protocol: raw MIDI bytes, but input packets have two modem status bytes.
 878  */
 879
 880 static void snd_usbmidi_ftdi_input(struct snd_usb_midi_in_endpoint *ep,
 881                                    uint8_t *buffer, int buffer_length)
 882 {
 883         if (buffer_length > 2)
 884                 snd_usbmidi_input_data(ep, 0, buffer + 2, buffer_length - 2);
 885 }
 886
 887 static const struct usb_protocol_ops snd_usbmidi_ftdi_ops = {
 888         .input = snd_usbmidi_ftdi_input,
 889         .output = snd_usbmidi_raw_output,
 890 };
 891
 892 static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep,
 893                                      uint8_t *buffer, int buffer_length)
 894 {
 895         if (buffer_length != 9)
 896                 return;
 897         buffer_length = 8;
 898         while (buffer_length && buffer[buffer_length - 1] == 0xFD)
 899                 buffer_length--;
 900         if (buffer_length)
 901                 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
 902 }
 903
 904 static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep,
 905                                       struct urb *urb)
 906 {
 907         int count;
 908
 909         if (!ep->ports[0].active)
 910                 return;
 911         switch (snd_usb_get_speed(ep->umidi->dev)) {
 912         case USB_SPEED_HIGH:
 913         case USB_SPEED_SUPER:
 914         case USB_SPEED_SUPER_PLUS:
 915                 count = 1;
 916                 break;
 917         default:
 918                 count = 2;
 919         }
 920         count = snd_rawmidi_transmit(ep->ports[0].substream,
 921                                      urb->transfer_buffer,
 922                                      count);
 923         if (count < 1) {
 924                 ep->ports[0].active = 0;
 925                 return;
 926         }
 927
 928         memset(urb->transfer_buffer + count, 0xFD, ep->max_transfer - count);
 929         urb->transfer_buffer_length = ep->max_transfer;
 930 }
 931
 932 static const struct usb_protocol_ops snd_usbmidi_122l_ops = {
 933         .input = snd_usbmidi_us122l_input,
 934         .output = snd_usbmidi_us122l_output,
 935 };
 936
 937 /*
 938  * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching.
 939  */
 940
 941 static void snd_usbmidi_emagic_init_out(struct snd_usb_midi_out_endpoint *ep)
 942 {
 943         static const u8 init_data[] = {
 944                 /* initialization magic: "get version" */
 945                 0xf0,
 946                 0x00, 0x20, 0x31,       /* Emagic */
 947                 0x64,                   /* Unitor8 */
 948                 0x0b,                   /* version number request */
 949                 0x00,                   /* command version */
 950                 0x00,                   /* EEPROM, box 0 */
 951                 0xf7
 952         };
 953         send_bulk_static_data(ep, init_data, sizeof(init_data));
 954         /* while we're at it, pour on more magic */
 955         send_bulk_static_data(ep, init_data, sizeof(init_data));
 956 }
 957
 958 static void snd_usbmidi_emagic_finish_out(struct snd_usb_midi_out_endpoint *ep)
 959 {
 960         static const u8 finish_data[] = {
 961                 /* switch to patch mode with last preset */
 962                 0xf0,
 963                 0x00, 0x20, 0x31,       /* Emagic */
 964                 0x64,                   /* Unitor8 */
 965                 0x10,                   /* patch switch command */
 966                 0x00,                   /* command version */
 967                 0x7f,                   /* to all boxes */
 968                 0x40,                   /* last preset in EEPROM */
 969                 0xf7
 970         };
 971         send_bulk_static_data(ep, finish_data, sizeof(finish_data));
 972 }
 973
 974 static void snd_usbmidi_emagic_input(struct snd_usb_midi_in_endpoint *ep,
 975                                      uint8_t *buffer, int buffer_length)
 976 {
 977         int i;
 978
 979         /* FF indicates end of valid data */
 980         for (i = 0; i < buffer_length; ++i)
 981                 if (buffer[i] == 0xff) {
 982                         buffer_length = i;
 983                         break;
 984                 }
 985
 986         /* handle F5 at end of last buffer */
 987         if (ep->seen_f5)
 988                 goto switch_port;
 989
 990         while (buffer_length > 0) {
 991                 /* determine size of data until next F5 */
 992                 for (i = 0; i < buffer_length; ++i)
 993                         if (buffer[i] == 0xf5)
 994                                 break;
 995                 snd_usbmidi_input_data(ep, ep->current_port, buffer, i);
 996                 buffer += i;
 997                 buffer_length -= i;
 998
 999                 if (buffer_length <= 0)
1000                         break;
1001                 /* assert(buffer[0] == 0xf5); */
1002                 ep->seen_f5 = 1;
1003                 ++buffer;
1004                 --buffer_length;
1005
1006         switch_port:
1007                 if (buffer_length <= 0)
1008                         break;
1009                 if (buffer[0] < 0x80) {
1010                         ep->current_port = (buffer[0] - 1) & 15;
1011                         ++buffer;
1012                         --buffer_length;
1013                 }
1014                 ep->seen_f5 = 0;
1015         }
1016 }
1017
1018 static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint *ep,
1019                                       struct urb *urb)
1020 {
1021         int port0 = ep->current_port;
1022         uint8_t *buf = urb->transfer_buffer;
1023         int buf_free = ep->max_transfer;
1024         int length, i;
1025
1026         for (i = 0; i < 0x10; ++i) {
1027                 /* round-robin, starting at the last current port */
1028                 int portnum = (port0 + i) & 15;
1029                 struct usbmidi_out_port *port = &ep->ports[portnum];
1030
1031                 if (!port->active)
1032                         continue;
1033                 if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) {
1034                         port->active = 0;
1035                         continue;
1036                 }
1037
1038                 if (portnum != ep->current_port) {
1039                         if (buf_free < 2)
1040                                 break;
1041                         ep->current_port = portnum;
1042                         buf[0] = 0xf5;
1043                         buf[1] = (portnum + 1) & 15;
1044                         buf += 2;
1045                         buf_free -= 2;
1046                 }
1047
1048                 if (buf_free < 1)
1049                         break;
1050                 length = snd_rawmidi_transmit(port->substream, buf, buf_free);
1051                 if (length > 0) {
1052                         buf += length;
1053                         buf_free -= length;
1054                         if (buf_free < 1)
1055                                 break;
1056                 }
1057         }
1058         if (buf_free < ep->max_transfer && buf_free > 0) {
1059                 *buf = 0xff;
1060                 --buf_free;
1061         }
1062         urb->transfer_buffer_length = ep->max_transfer - buf_free;
1063 }
1064
1065 static const struct usb_protocol_ops snd_usbmidi_emagic_ops = {
1066         .input = snd_usbmidi_emagic_input,
1067         .output = snd_usbmidi_emagic_output,
1068         .init_out_endpoint = snd_usbmidi_emagic_init_out,
1069         .finish_out_endpoint = snd_usbmidi_emagic_finish_out,
1070 };
1071
1072
1073 static void update_roland_altsetting(struct snd_usb_midi *umidi)
1074 {
1075         struct usb_interface *intf;
1076         struct usb_host_interface *hostif;
1077         struct usb_interface_descriptor *intfd;
1078         int is_light_load;
1079
1080         intf = umidi->iface;
1081         is_light_load = intf->cur_altsetting != intf->altsetting;
1082         if (umidi->roland_load_ctl->private_value == is_light_load)
1083                 return;
1084         hostif = &intf->altsetting[umidi->roland_load_ctl->private_value];
1085         intfd = get_iface_desc(hostif);
1086         snd_usbmidi_input_stop(&umidi->list);
1087         usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
1088                           intfd->bAlternateSetting);
1089         snd_usbmidi_input_start(&umidi->list);
1090 }
1091
1092 static int substream_open(struct snd_rawmidi_substream *substream, int dir,
1093                           int open)
1094 {
1095         struct snd_usb_midi *umidi = substream->rmidi->private_data;
1096         struct snd_kcontrol *ctl;
1097
1098         down_read(&umidi->disc_rwsem);
1099         if (umidi->disconnected) {
1100                 up_read(&umidi->disc_rwsem);
1101                 return open ? -ENODEV : 0;
1102         }
1103
1104         mutex_lock(&umidi->mutex);
1105         if (open) {
1106                 if (!umidi->opened[0] && !umidi->opened[1]) {
1107                         if (umidi->roland_load_ctl) {
1108                                 ctl = umidi->roland_load_ctl;
1109                                 ctl->vd[0].access |=
1110                                         SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1111                                 snd_ctl_notify(umidi->card,
1112                                        SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
1113                                 update_roland_altsetting(umidi);
1114                         }
1115                 }
1116                 umidi->opened[dir]++;
1117                 if (umidi->opened[1])
1118                         snd_usbmidi_input_start(&umidi->list);
1119         } else {
1120                 umidi->opened[dir]--;
1121                 if (!umidi->opened[1])
1122                         snd_usbmidi_input_stop(&umidi->list);
1123                 if (!umidi->opened[0] && !umidi->opened[1]) {
1124                         if (umidi->roland_load_ctl) {
1125                                 ctl = umidi->roland_load_ctl;
1126                                 ctl->vd[0].access &=
1127                                         ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1128                                 snd_ctl_notify(umidi->card,
1129                                        SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
1130                         }
1131                 }
1132         }
1133         mutex_unlock(&umidi->mutex);
1134         up_read(&umidi->disc_rwsem);
1135         return 0;
1136 }
1137
1138 static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream)
1139 {
1140         struct snd_usb_midi *umidi = substream->rmidi->private_data;
1141         struct usbmidi_out_port *port = NULL;
1142         int i, j;
1143
1144         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
1145                 if (umidi->endpoints[i].out)
1146                         for (j = 0; j < 0x10; ++j)
1147                                 if (umidi->endpoints[i].out->ports[j].substream == substream) {
1148                                         port = &umidi->endpoints[i].out->ports[j];
1149                                         break;
1150                                 }
1151         if (!port) {
1152                 snd_BUG();
1153                 return -ENXIO;
1154         }
1155
1156         substream->runtime->private_data = port;
1157         port->state = STATE_UNKNOWN;
1158         return substream_open(substream, 0, 1);
1159 }
1160
1161 static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream)
1162 {
1163         return substream_open(substream, 0, 0);
1164 }
1165
1166 static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream,
1167                                        int up)
1168 {
1169         struct usbmidi_out_port *port =
1170                 (struct usbmidi_out_port *)substream->runtime->private_data;
1171
1172         port->active = up;
1173         if (up) {
1174                 if (port->ep->umidi->disconnected) {
1175                         /* gobble up remaining bytes to prevent wait in
1176                          * snd_rawmidi_drain_output */
1177                         while (!snd_rawmidi_transmit_empty(substream))
1178                                 snd_rawmidi_transmit_ack(substream, 1);
1179                         return;
1180                 }
1181                 tasklet_schedule(&port->ep->tasklet);
1182         }
1183 }
1184
1185 static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream)
1186 {
1187         struct usbmidi_out_port *port = substream->runtime->private_data;
1188         struct snd_usb_midi_out_endpoint *ep = port->ep;
1189         unsigned int drain_urbs;
1190         DEFINE_WAIT(wait);
1191         long timeout = msecs_to_jiffies(50);
1192
1193         if (ep->umidi->disconnected)
1194                 return;
1195         /*
1196          * The substream buffer is empty, but some data might still be in the
1197          * currently active URBs, so we have to wait for those to complete.
1198          */
1199         spin_lock_irq(&ep->buffer_lock);
1200         drain_urbs = ep->active_urbs;
1201         if (drain_urbs) {
1202                 ep->drain_urbs |= drain_urbs;
1203                 do {
1204                         prepare_to_wait(&ep->drain_wait, &wait,
1205                                         TASK_UNINTERRUPTIBLE);
1206                         spin_unlock_irq(&ep->buffer_lock);
1207                         timeout = schedule_timeout(timeout);
1208                         spin_lock_irq(&ep->buffer_lock);
1209                         drain_urbs &= ep->drain_urbs;
1210                 } while (drain_urbs && timeout);
1211                 finish_wait(&ep->drain_wait, &wait);
1212         }
1213         spin_unlock_irq(&ep->buffer_lock);
1214 }
1215
1216 static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream)
1217 {
1218         return substream_open(substream, 1, 1);
1219 }
1220
1221 static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream)
1222 {
1223         return substream_open(substream, 1, 0);
1224 }
1225
1226 static void snd_usbmidi_input_trigger(struct snd_rawmidi_substream *substream,
1227                                       int up)
1228 {
1229         struct snd_usb_midi *umidi = substream->rmidi->private_data;
1230
1231         if (up)
1232                 set_bit(substream->number, &umidi->input_triggered);
1233         else
1234                 clear_bit(substream->number, &umidi->input_triggered);
1235 }
1236
1237 static const struct snd_rawmidi_ops snd_usbmidi_output_ops = {
1238         .open = snd_usbmidi_output_open,
1239         .close = snd_usbmidi_output_close,
1240         .trigger = snd_usbmidi_output_trigger,
1241         .drain = snd_usbmidi_output_drain,
1242 };
1243
1244 static const struct snd_rawmidi_ops snd_usbmidi_input_ops = {
1245         .open = snd_usbmidi_input_open,
1246         .close = snd_usbmidi_input_close,
1247         .trigger = snd_usbmidi_input_trigger
1248 };
1249
1250 static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb,
1251                                 unsigned int buffer_length)
1252 {
1253         usb_free_coherent(umidi->dev, buffer_length,
1254                           urb->transfer_buffer, urb->transfer_dma);
1255         usb_free_urb(urb);
1256 }
1257
1258 /*
1259  * Frees an input endpoint.
1260  * May be called when ep hasn't been initialized completely.
1261  */
1262 static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint *ep)
1263 {
1264         unsigned int i;
1265
1266         for (i = 0; i < INPUT_URBS; ++i)
1267                 if (ep->urbs[i])
1268                         free_urb_and_buffer(ep->umidi, ep->urbs[i],
1269                                             ep->urbs[i]->transfer_buffer_length);
1270         kfree(ep);
1271 }
1272
1273 /*
1274  * Creates an input endpoint.
1275  */
1276 static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi *umidi,
1277                                           struct snd_usb_midi_endpoint_info *ep_info,
1278                                           struct snd_usb_midi_endpoint *rep)
1279 {
1280         struct snd_usb_midi_in_endpoint *ep;
1281         void *buffer;
1282         unsigned int pipe;
1283         int length;
1284         unsigned int i;
1285
1286         rep->in = NULL;
1287         ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1288         if (!ep)
1289                 return -ENOMEM;
1290         ep->umidi = umidi;
1291
1292         for (i = 0; i < INPUT_URBS; ++i) {
1293                 ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
1294                 if (!ep->urbs[i]) {
1295                         snd_usbmidi_in_endpoint_delete(ep);
1296                         return -ENOMEM;
1297                 }
1298         }
1299         if (ep_info->in_interval)
1300                 pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep);
1301         else
1302                 pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep);
1303         length = usb_maxpacket(umidi->dev, pipe, 0);
1304         for (i = 0; i < INPUT_URBS; ++i) {
1305                 buffer = usb_alloc_coherent(umidi->dev, length, GFP_KERNEL,
1306                                             &ep->urbs[i]->transfer_dma);
1307                 if (!buffer) {
1308                         snd_usbmidi_in_endpoint_delete(ep);
1309                         return -ENOMEM;
1310                 }
1311                 if (ep_info->in_interval)
1312                         usb_fill_int_urb(ep->urbs[i], umidi->dev,
1313                                          pipe, buffer, length,
1314                                          snd_usbmidi_in_urb_complete,
1315                                          ep, ep_info->in_interval);
1316                 else
1317                         usb_fill_bulk_urb(ep->urbs[i], umidi->dev,
1318                                           pipe, buffer, length,
1319                                           snd_usbmidi_in_urb_complete, ep);
1320                 ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1321         }
1322
1323         rep->in = ep;
1324         return 0;
1325 }
1326
1327 /*
1328  * Frees an output endpoint.
1329  * May be called when ep hasn't been initialized completely.
1330  */
1331 static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep)
1332 {
1333         unsigned int i;
1334
1335         for (i = 0; i < OUTPUT_URBS; ++i)
1336                 if (ep->urbs[i].urb) {
1337                         free_urb_and_buffer(ep->umidi, ep->urbs[i].urb,
1338                                             ep->max_transfer);
1339                         ep->urbs[i].urb = NULL;
1340                 }
1341 }
1342
1343 static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep)
1344 {
1345         snd_usbmidi_out_endpoint_clear(ep);
1346         kfree(ep);
1347 }
1348
1349 /*
1350  * Creates an output endpoint, and initializes output ports.
1351  */
1352 static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi *umidi,
1353                                            struct snd_usb_midi_endpoint_info *ep_info,
1354                                            struct snd_usb_midi_endpoint *rep)
1355 {
1356         struct snd_usb_midi_out_endpoint *ep;
1357         unsigned int i;
1358         unsigned int pipe;
1359         void *buffer;
1360
1361         rep->out = NULL;
1362         ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1363         if (!ep)
1364                 return -ENOMEM;
1365         ep->umidi = umidi;
1366
1367         for (i = 0; i < OUTPUT_URBS; ++i) {
1368                 ep->urbs[i].urb = usb_alloc_urb(0, GFP_KERNEL);
1369                 if (!ep->urbs[i].urb) {
1370                         snd_usbmidi_out_endpoint_delete(ep);
1371                         return -ENOMEM;
1372                 }
1373                 ep->urbs[i].ep = ep;
1374         }
1375         if (ep_info->out_interval)
1376                 pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep);
1377         else
1378                 pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep);
1379         switch (umidi->usb_id) {
1380         default:
1381                 ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1);
1382                 break;
1383                 /*
1384                  * Various chips declare a packet size larger than 4 bytes, but
1385                  * do not actually work with larger packets:
1386                  */
1387         case USB_ID(0x0a67, 0x5011): /* Medeli DD305 */
1388         case USB_ID(0x0a92, 0x1020): /* ESI M4U */
1389         case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */
1390         case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */
1391         case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */
1392         case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */
1393         case USB_ID(0xfc08, 0x0101): /* Unknown vendor Cable */
1394                 ep->max_transfer = 4;
1395                 break;
1396                 /*
1397                  * Some devices only work with 9 bytes packet size:
1398                  */
1399         case USB_ID(0x0644, 0x800E): /* Tascam US-122L */
1400         case USB_ID(0x0644, 0x800F): /* Tascam US-144 */
1401                 ep->max_transfer = 9;
1402                 break;
1403         }
1404         for (i = 0; i < OUTPUT_URBS; ++i) {
1405                 buffer = usb_alloc_coherent(umidi->dev,
1406                                             ep->max_transfer, GFP_KERNEL,
1407                                             &ep->urbs[i].urb->transfer_dma);
1408                 if (!buffer) {
1409                         snd_usbmidi_out_endpoint_delete(ep);
1410                         return -ENOMEM;
1411                 }
1412                 if (ep_info->out_interval)
1413                         usb_fill_int_urb(ep->urbs[i].urb, umidi->dev,
1414                                          pipe, buffer, ep->max_transfer,
1415                                          snd_usbmidi_out_urb_complete,
1416                                          &ep->urbs[i], ep_info->out_interval);
1417                 else
1418                         usb_fill_bulk_urb(ep->urbs[i].urb, umidi->dev,
1419                                           pipe, buffer, ep->max_transfer,
1420                                           snd_usbmidi_out_urb_complete,
1421                                           &ep->urbs[i]);
1422                 ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1423         }
1424
1425         spin_lock_init(&ep->buffer_lock);
1426         tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep);
1427         init_waitqueue_head(&ep->drain_wait);
1428
1429         for (i = 0; i < 0x10; ++i)
1430                 if (ep_info->out_cables & (1 << i)) {
1431                         ep->ports[i].ep = ep;
1432                         ep->ports[i].cable = i << 4;
1433                 }
1434
1435         if (umidi->usb_protocol_ops->init_out_endpoint)
1436                 umidi->usb_protocol_ops->init_out_endpoint(ep);
1437
1438         rep->out = ep;
1439         return 0;
1440 }
1441
1442 /*
1443  * Frees everything.
1444  */
1445 static void snd_usbmidi_free(struct snd_usb_midi *umidi)
1446 {
1447         int i;
1448
1449         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1450                 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
1451                 if (ep->out)
1452                         snd_usbmidi_out_endpoint_delete(ep->out);
1453                 if (ep->in)
1454                         snd_usbmidi_in_endpoint_delete(ep->in);
1455         }
1456         mutex_destroy(&umidi->mutex);
1457         kfree(umidi);
1458 }
1459
1460 /*
1461  * Unlinks all URBs (must be done before the usb_device is deleted).
1462  */
1463 void snd_usbmidi_disconnect(struct list_head *p)
1464 {
1465         struct snd_usb_midi *umidi;
1466         unsigned int i, j;
1467
1468         umidi = list_entry(p, struct snd_usb_midi, list);
1469         /*
1470          * an URB's completion handler may start the timer and
1471          * a timer may submit an URB. To reliably break the cycle
1472          * a flag under lock must be used
1473          */
1474         down_write(&umidi->disc_rwsem);
1475         spin_lock_irq(&umidi->disc_lock);
1476         umidi->disconnected = 1;
1477         spin_unlock_irq(&umidi->disc_lock);
1478         up_write(&umidi->disc_rwsem);
1479
1480         del_timer_sync(&umidi->error_timer);
1481
1482         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1483                 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
1484                 if (ep->out)
1485                         tasklet_kill(&ep->out->tasklet);
1486                 if (ep->out) {
1487                         for (j = 0; j < OUTPUT_URBS; ++j)
1488                                 usb_kill_urb(ep->out->urbs[j].urb);
1489                         if (umidi->usb_protocol_ops->finish_out_endpoint)
1490                                 umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
1491                         ep->out->active_urbs = 0;
1492                         if (ep->out->drain_urbs) {
1493                                 ep->out->drain_urbs = 0;
1494                                 wake_up(&ep->out->drain_wait);
1495                         }
1496                 }
1497                 if (ep->in)
1498                         for (j = 0; j < INPUT_URBS; ++j)
1499                                 usb_kill_urb(ep->in->urbs[j]);
1500                 /* free endpoints here; later call can result in Oops */
1501                 if (ep->out)
1502                         snd_usbmidi_out_endpoint_clear(ep->out);
1503                 if (ep->in) {
1504                         snd_usbmidi_in_endpoint_delete(ep->in);
1505                         ep->in = NULL;
1506                 }
1507         }
1508 }
1509 EXPORT_SYMBOL(snd_usbmidi_disconnect);
1510
1511 static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi)
1512 {
1513         struct snd_usb_midi *umidi = rmidi->private_data;
1514         snd_usbmidi_free(umidi);
1515 }
1516
1517 static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi *umidi,
1518                                                                 int stream,
1519                                                                 int number)
1520 {
1521         struct snd_rawmidi_substream *substream;
1522
1523         list_for_each_entry(substream, &umidi->rmidi->streams[stream].substreams,
1524                             list) {
1525                 if (substream->number == number)
1526                         return substream;
1527         }
1528         return NULL;
1529 }
1530
1531 /*
1532  * This list specifies names for ports that do not fit into the standard
1533  * "(product) MIDI (n)" schema because they aren't external MIDI ports,
1534  * such as internal control or synthesizer ports.
1535  */
1536 static struct port_info {
1537         u32 id;
1538         short int port;
1539         short int voices;
1540         const char *name;
1541         unsigned int seq_flags;
1542 } snd_usbmidi_port_info[] = {
1543 #define PORT_INFO(vendor, product, num, name_, voices_, flags) \
1544         { .id = USB_ID(vendor, product), \
1545           .port = num, .voices = voices_, \
1546           .name = name_, .seq_flags = flags }
1547 #define EXTERNAL_PORT(vendor, product, num, name) \
1548         PORT_INFO(vendor, product, num, name, 0, \
1549                   SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1550                   SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1551                   SNDRV_SEQ_PORT_TYPE_PORT)
1552 #define CONTROL_PORT(vendor, product, num, name) \
1553         PORT_INFO(vendor, product, num, name, 0, \
1554                   SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1555                   SNDRV_SEQ_PORT_TYPE_HARDWARE)
1556 #define GM_SYNTH_PORT(vendor, product, num, name, voices) \
1557         PORT_INFO(vendor, product, num, name, voices, \
1558                   SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1559                   SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1560                   SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1561                   SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1562 #define ROLAND_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_MIDI_GM2 | \
1567                   SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1568                   SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1569                   SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1570                   SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1571 #define SOUNDCANVAS_PORT(vendor, product, num, name, voices) \
1572         PORT_INFO(vendor, product, num, name, voices, \
1573                   SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1574                   SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1575                   SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1576                   SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1577                   SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1578                   SNDRV_SEQ_PORT_TYPE_MIDI_MT32 | \
1579                   SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1580                   SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1581         /* Yamaha MOTIF XF */
1582         GM_SYNTH_PORT(0x0499, 0x105c, 0, "%s Tone Generator", 128),
1583         CONTROL_PORT(0x0499, 0x105c, 1, "%s Remote Control"),
1584         EXTERNAL_PORT(0x0499, 0x105c, 2, "%s Thru"),
1585         CONTROL_PORT(0x0499, 0x105c, 3, "%s Editor"),
1586         /* Roland UA-100 */
1587         CONTROL_PORT(0x0582, 0x0000, 2, "%s Control"),
1588         /* Roland SC-8850 */
1589         SOUNDCANVAS_PORT(0x0582, 0x0003, 0, "%s Part A", 128),
1590         SOUNDCANVAS_PORT(0x0582, 0x0003, 1, "%s Part B", 128),
1591         SOUNDCANVAS_PORT(0x0582, 0x0003, 2, "%s Part C", 128),
1592         SOUNDCANVAS_PORT(0x0582, 0x0003, 3, "%s Part D", 128),
1593         EXTERNAL_PORT(0x0582, 0x0003, 4, "%s MIDI 1"),
1594         EXTERNAL_PORT(0x0582, 0x0003, 5, "%s MIDI 2"),
1595         /* Roland U-8 */
1596         EXTERNAL_PORT(0x0582, 0x0004, 0, "%s MIDI"),
1597         CONTROL_PORT(0x0582, 0x0004, 1, "%s Control"),
1598         /* Roland SC-8820 */
1599         SOUNDCANVAS_PORT(0x0582, 0x0007, 0, "%s Part A", 64),
1600         SOUNDCANVAS_PORT(0x0582, 0x0007, 1, "%s Part B", 64),
1601         EXTERNAL_PORT(0x0582, 0x0007, 2, "%s MIDI"),
1602         /* Roland SK-500 */
1603         SOUNDCANVAS_PORT(0x0582, 0x000b, 0, "%s Part A", 64),
1604         SOUNDCANVAS_PORT(0x0582, 0x000b, 1, "%s Part B", 64),
1605         EXTERNAL_PORT(0x0582, 0x000b, 2, "%s MIDI"),
1606         /* Roland SC-D70 */
1607         SOUNDCANVAS_PORT(0x0582, 0x000c, 0, "%s Part A", 64),
1608         SOUNDCANVAS_PORT(0x0582, 0x000c, 1, "%s Part B", 64),
1609         EXTERNAL_PORT(0x0582, 0x000c, 2, "%s MIDI"),
1610         /* Edirol UM-880 */
1611         CONTROL_PORT(0x0582, 0x0014, 8, "%s Control"),
1612         /* Edirol SD-90 */
1613         ROLAND_SYNTH_PORT(0x0582, 0x0016, 0, "%s Part A", 128),
1614         ROLAND_SYNTH_PORT(0x0582, 0x0016, 1, "%s Part B", 128),
1615         EXTERNAL_PORT(0x0582, 0x0016, 2, "%s MIDI 1"),
1616         EXTERNAL_PORT(0x0582, 0x0016, 3, "%s MIDI 2"),
1617         /* Edirol UM-550 */
1618         CONTROL_PORT(0x0582, 0x0023, 5, "%s Control"),
1619         /* Edirol SD-20 */
1620         ROLAND_SYNTH_PORT(0x0582, 0x0027, 0, "%s Part A", 64),
1621         ROLAND_SYNTH_PORT(0x0582, 0x0027, 1, "%s Part B", 64),
1622         EXTERNAL_PORT(0x0582, 0x0027, 2, "%s MIDI"),
1623         /* Edirol SD-80 */
1624         ROLAND_SYNTH_PORT(0x0582, 0x0029, 0, "%s Part A", 128),
1625         ROLAND_SYNTH_PORT(0x0582, 0x0029, 1, "%s Part B", 128),
1626         EXTERNAL_PORT(0x0582, 0x0029, 2, "%s MIDI 1"),
1627         EXTERNAL_PORT(0x0582, 0x0029, 3, "%s MIDI 2"),
1628         /* Edirol UA-700 */
1629         EXTERNAL_PORT(0x0582, 0x002b, 0, "%s MIDI"),
1630         CONTROL_PORT(0x0582, 0x002b, 1, "%s Control"),
1631         /* Roland VariOS */
1632         EXTERNAL_PORT(0x0582, 0x002f, 0, "%s MIDI"),
1633         EXTERNAL_PORT(0x0582, 0x002f, 1, "%s External MIDI"),
1634         EXTERNAL_PORT(0x0582, 0x002f, 2, "%s Sync"),
1635         /* Edirol PCR */
1636         EXTERNAL_PORT(0x0582, 0x0033, 0, "%s MIDI"),
1637         EXTERNAL_PORT(0x0582, 0x0033, 1, "%s 1"),
1638         EXTERNAL_PORT(0x0582, 0x0033, 2, "%s 2"),
1639         /* BOSS GS-10 */
1640         EXTERNAL_PORT(0x0582, 0x003b, 0, "%s MIDI"),
1641         CONTROL_PORT(0x0582, 0x003b, 1, "%s Control"),
1642         /* Edirol UA-1000 */
1643         EXTERNAL_PORT(0x0582, 0x0044, 0, "%s MIDI"),
1644         CONTROL_PORT(0x0582, 0x0044, 1, "%s Control"),
1645         /* Edirol UR-80 */
1646         EXTERNAL_PORT(0x0582, 0x0048, 0, "%s MIDI"),
1647         EXTERNAL_PORT(0x0582, 0x0048, 1, "%s 1"),
1648         EXTERNAL_PORT(0x0582, 0x0048, 2, "%s 2"),
1649         /* Edirol PCR-A */
1650         EXTERNAL_PORT(0x0582, 0x004d, 0, "%s MIDI"),
1651         EXTERNAL_PORT(0x0582, 0x004d, 1, "%s 1"),
1652         EXTERNAL_PORT(0x0582, 0x004d, 2, "%s 2"),
1653         /* BOSS GT-PRO */
1654         CONTROL_PORT(0x0582, 0x0089, 0, "%s Control"),
1655         /* Edirol UM-3EX */
1656         CONTROL_PORT(0x0582, 0x009a, 3, "%s Control"),
1657         /* Roland VG-99 */
1658         CONTROL_PORT(0x0582, 0x00b2, 0, "%s Control"),
1659         EXTERNAL_PORT(0x0582, 0x00b2, 1, "%s MIDI"),
1660         /* Cakewalk Sonar V-Studio 100 */
1661         EXTERNAL_PORT(0x0582, 0x00eb, 0, "%s MIDI"),
1662         CONTROL_PORT(0x0582, 0x00eb, 1, "%s Control"),
1663         /* Roland VB-99 */
1664         CONTROL_PORT(0x0582, 0x0102, 0, "%s Control"),
1665         EXTERNAL_PORT(0x0582, 0x0102, 1, "%s MIDI"),
1666         /* Roland A-PRO */
1667         EXTERNAL_PORT(0x0582, 0x010f, 0, "%s MIDI"),
1668         CONTROL_PORT(0x0582, 0x010f, 1, "%s 1"),
1669         CONTROL_PORT(0x0582, 0x010f, 2, "%s 2"),
1670         /* Roland SD-50 */
1671         ROLAND_SYNTH_PORT(0x0582, 0x0114, 0, "%s Synth", 128),
1672         EXTERNAL_PORT(0x0582, 0x0114, 1, "%s MIDI"),
1673         CONTROL_PORT(0x0582, 0x0114, 2, "%s Control"),
1674         /* Roland OCTA-CAPTURE */
1675         EXTERNAL_PORT(0x0582, 0x0120, 0, "%s MIDI"),
1676         CONTROL_PORT(0x0582, 0x0120, 1, "%s Control"),
1677         EXTERNAL_PORT(0x0582, 0x0121, 0, "%s MIDI"),
1678         CONTROL_PORT(0x0582, 0x0121, 1, "%s Control"),
1679         /* Roland SPD-SX */
1680         CONTROL_PORT(0x0582, 0x0145, 0, "%s Control"),
1681         EXTERNAL_PORT(0x0582, 0x0145, 1, "%s MIDI"),
1682         /* Roland A-Series */
1683         CONTROL_PORT(0x0582, 0x0156, 0, "%s Keyboard"),
1684         EXTERNAL_PORT(0x0582, 0x0156, 1, "%s MIDI"),
1685         /* Roland INTEGRA-7 */
1686         ROLAND_SYNTH_PORT(0x0582, 0x015b, 0, "%s Synth", 128),
1687         CONTROL_PORT(0x0582, 0x015b, 1, "%s Control"),
1688         /* M-Audio MidiSport 8x8 */
1689         CONTROL_PORT(0x0763, 0x1031, 8, "%s Control"),
1690         CONTROL_PORT(0x0763, 0x1033, 8, "%s Control"),
1691         /* MOTU Fastlane */
1692         EXTERNAL_PORT(0x07fd, 0x0001, 0, "%s MIDI A"),
1693         EXTERNAL_PORT(0x07fd, 0x0001, 1, "%s MIDI B"),
1694         /* Emagic Unitor8/AMT8/MT4 */
1695         EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"),
1696         EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"),
1697         EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"),
1698         /* Akai MPD16 */
1699         CONTROL_PORT(0x09e8, 0x0062, 0, "%s Control"),
1700         PORT_INFO(0x09e8, 0x0062, 1, "%s MIDI", 0,
1701                 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1702                 SNDRV_SEQ_PORT_TYPE_HARDWARE),
1703         /* Access Music Virus TI */
1704         EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"),
1705         PORT_INFO(0x133e, 0x0815, 1, "%s Synth", 0,
1706                 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1707                 SNDRV_SEQ_PORT_TYPE_HARDWARE |
1708                 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER),
1709 };
1710
1711 static struct port_info *find_port_info(struct snd_usb_midi *umidi, int number)
1712 {
1713         int i;
1714
1715         for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) {
1716                 if (snd_usbmidi_port_info[i].id == umidi->usb_id &&
1717                     snd_usbmidi_port_info[i].port == number)
1718                         return &snd_usbmidi_port_info[i];
1719         }
1720         return NULL;
1721 }
1722
1723 static void snd_usbmidi_get_port_info(struct snd_rawmidi *rmidi, int number,
1724                                       struct snd_seq_port_info *seq_port_info)
1725 {
1726         struct snd_usb_midi *umidi = rmidi->private_data;
1727         struct port_info *port_info;
1728
1729         /* TODO: read port flags from descriptors */
1730         port_info = find_port_info(umidi, number);
1731         if (port_info) {
1732                 seq_port_info->type = port_info->seq_flags;
1733                 seq_port_info->midi_voices = port_info->voices;
1734         }
1735 }
1736
1737 static void snd_usbmidi_init_substream(struct snd_usb_midi *umidi,
1738                                        int stream, int number,
1739                                        struct snd_rawmidi_substream **rsubstream)
1740 {
1741         struct port_info *port_info;
1742         const char *name_format;
1743
1744         struct snd_rawmidi_substream *substream =
1745                 snd_usbmidi_find_substream(umidi, stream, number);
1746         if (!substream) {
1747                 dev_err(&umidi->dev->dev, "substream %d:%d not found\n", stream,
1748                         number);
1749                 return;
1750         }
1751
1752         /* TODO: read port name from jack descriptor */
1753         port_info = find_port_info(umidi, number);
1754         name_format = port_info ? port_info->name : "%s MIDI %d";
1755         snprintf(substream->name, sizeof(substream->name),
1756                  name_format, umidi->card->shortname, number + 1);
1757
1758         *rsubstream = substream;
1759 }
1760
1761 /*
1762  * Creates the endpoints and their ports.
1763  */
1764 static int snd_usbmidi_create_endpoints(struct snd_usb_midi *umidi,
1765                                         struct snd_usb_midi_endpoint_info *endpoints)
1766 {
1767         int i, j, err;
1768         int out_ports = 0, in_ports = 0;
1769
1770         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1771                 if (endpoints[i].out_cables) {
1772                         err = snd_usbmidi_out_endpoint_create(umidi,
1773                                                               &endpoints[i],
1774                                                               &umidi->endpoints[i]);
1775                         if (err < 0)
1776                                 return err;
1777                 }
1778                 if (endpoints[i].in_cables) {
1779                         err = snd_usbmidi_in_endpoint_create(umidi,
1780                                                              &endpoints[i],
1781                                                              &umidi->endpoints[i]);
1782                         if (err < 0)
1783                                 return err;
1784                 }
1785
1786                 for (j = 0; j < 0x10; ++j) {
1787                         if (endpoints[i].out_cables & (1 << j)) {
1788                                 snd_usbmidi_init_substream(umidi,
1789                                                            SNDRV_RAWMIDI_STREAM_OUTPUT,
1790                                                            out_ports,
1791                                                            &umidi->endpoints[i].out->ports[j].substream);
1792                                 ++out_ports;
1793                         }
1794                         if (endpoints[i].in_cables & (1 << j)) {
1795                                 snd_usbmidi_init_substream(umidi,
1796                                                            SNDRV_RAWMIDI_STREAM_INPUT,
1797                                                            in_ports,
1798                                                            &umidi->endpoints[i].in->ports[j].substream);
1799                                 ++in_ports;
1800                         }
1801                 }
1802         }
1803         dev_dbg(&umidi->dev->dev, "created %d output and %d input ports\n",
1804                     out_ports, in_ports);
1805         return 0;
1806 }
1807
1808 static struct usb_ms_endpoint_descriptor *find_usb_ms_endpoint_descriptor(
1809                                         struct usb_host_endpoint *hostep)
1810 {
1811         unsigned char *extra = hostep->extra;
1812         int extralen = hostep->extralen;
1813
1814         while (extralen > 3) {
1815                 struct usb_ms_endpoint_descriptor *ms_ep =
1816                                 (struct usb_ms_endpoint_descriptor *)extra;
1817
1818                 if (ms_ep->bLength > 3 &&
1819                     ms_ep->bDescriptorType == USB_DT_CS_ENDPOINT &&
1820                     ms_ep->bDescriptorSubtype == UAC_MS_GENERAL)
1821                         return ms_ep;
1822                 if (!extra[0])
1823                         break;
1824                 extralen -= extra[0];
1825                 extra += extra[0];
1826         }
1827         return NULL;
1828 }
1829
1830 /*
1831  * Returns MIDIStreaming device capabilities.
1832  */
1833 static int snd_usbmidi_get_ms_info(struct snd_usb_midi *umidi,
1834                                    struct snd_usb_midi_endpoint_info *endpoints)
1835 {
1836         struct usb_interface *intf;
1837         struct usb_host_interface *hostif;
1838         struct usb_interface_descriptor *intfd;
1839         struct usb_ms_header_descriptor *ms_header;
1840         struct usb_host_endpoint *hostep;
1841         struct usb_endpoint_descriptor *ep;
1842         struct usb_ms_endpoint_descriptor *ms_ep;
1843         int i, epidx;
1844
1845         intf = umidi->iface;
1846         if (!intf)
1847                 return -ENXIO;
1848         hostif = &intf->altsetting[0];
1849         intfd = get_iface_desc(hostif);
1850         ms_header = (struct usb_ms_header_descriptor *)hostif->extra;
1851         if (hostif->extralen >= 7 &&
1852             ms_header->bLength >= 7 &&
1853             ms_header->bDescriptorType == USB_DT_CS_INTERFACE &&
1854             ms_header->bDescriptorSubtype == UAC_HEADER)
1855                 dev_dbg(&umidi->dev->dev, "MIDIStreaming version %02x.%02x\n",
1856                             ms_header->bcdMSC[1], ms_header->bcdMSC[0]);
1857         else
1858                 dev_warn(&umidi->dev->dev,
1859                          "MIDIStreaming interface descriptor not found\n");
1860
1861         epidx = 0;
1862         for (i = 0; i < intfd->bNumEndpoints; ++i) {
1863                 hostep = &hostif->endpoint[i];
1864                 ep = get_ep_desc(hostep);
1865                 if (!usb_endpoint_xfer_bulk(ep) && !usb_endpoint_xfer_int(ep))
1866                         continue;
1867                 ms_ep = find_usb_ms_endpoint_descriptor(hostep);
1868                 if (!ms_ep)
1869                         continue;
1870                 if (ms_ep->bLength <= sizeof(*ms_ep))
1871                         continue;
1872                 if (ms_ep->bNumEmbMIDIJack > 0x10)
1873                         continue;
1874                 if (ms_ep->bLength < sizeof(*ms_ep) + ms_ep->bNumEmbMIDIJack)
1875                         continue;
1876                 if (usb_endpoint_dir_out(ep)) {
1877                         if (endpoints[epidx].out_ep) {
1878                                 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1879                                         dev_warn(&umidi->dev->dev,
1880                                                  "too many endpoints\n");
1881                                         break;
1882                                 }
1883                         }
1884                         endpoints[epidx].out_ep = usb_endpoint_num(ep);
1885                         if (usb_endpoint_xfer_int(ep))
1886                                 endpoints[epidx].out_interval = ep->bInterval;
1887                         else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1888                                 /*
1889                                  * Low speed bulk transfers don't exist, so
1890                                  * force interrupt transfers for devices like
1891                                  * ESI MIDI Mate that try to use them anyway.
1892                                  */
1893                                 endpoints[epidx].out_interval = 1;
1894                         endpoints[epidx].out_cables =
1895                                 (1 << ms_ep->bNumEmbMIDIJack) - 1;
1896                         dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",
1897                                 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1898                 } else {
1899                         if (endpoints[epidx].in_ep) {
1900                                 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1901                                         dev_warn(&umidi->dev->dev,
1902                                                  "too many endpoints\n");
1903                                         break;
1904                                 }
1905                         }
1906                         endpoints[epidx].in_ep = usb_endpoint_num(ep);
1907                         if (usb_endpoint_xfer_int(ep))
1908                                 endpoints[epidx].in_interval = ep->bInterval;
1909                         else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1910                                 endpoints[epidx].in_interval = 1;
1911                         endpoints[epidx].in_cables =
1912                                 (1 << ms_ep->bNumEmbMIDIJack) - 1;
1913                         dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",
1914                                 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1915                 }
1916         }
1917         return 0;
1918 }
1919
1920 static int roland_load_info(struct snd_kcontrol *kcontrol,
1921                             struct snd_ctl_elem_info *info)
1922 {
1923         static const char *const names[] = { "High Load", "Light Load" };
1924
1925         return snd_ctl_enum_info(info, 1, 2, names);
1926 }
1927
1928 static int roland_load_get(struct snd_kcontrol *kcontrol,
1929                            struct snd_ctl_elem_value *value)
1930 {
1931         value->value.enumerated.item[0] = kcontrol->private_value;
1932         return 0;
1933 }
1934
1935 static int roland_load_put(struct snd_kcontrol *kcontrol,
1936                            struct snd_ctl_elem_value *value)
1937 {
1938         struct snd_usb_midi *umidi = kcontrol->private_data;
1939         int changed;
1940
1941         if (value->value.enumerated.item[0] > 1)
1942                 return -EINVAL;
1943         mutex_lock(&umidi->mutex);
1944         changed = value->value.enumerated.item[0] != kcontrol->private_value;
1945         if (changed)
1946                 kcontrol->private_value = value->value.enumerated.item[0];
1947         mutex_unlock(&umidi->mutex);
1948         return changed;
1949 }
1950
1951 static const struct snd_kcontrol_new roland_load_ctl = {
1952         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1953         .name = "MIDI Input Mode",
1954         .info = roland_load_info,
1955         .get = roland_load_get,
1956         .put = roland_load_put,
1957         .private_value = 1,
1958 };
1959
1960 /*
1961  * On Roland devices, use the second alternate setting to be able to use
1962  * the interrupt input endpoint.
1963  */
1964 static void snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi *umidi)
1965 {
1966         struct usb_interface *intf;
1967         struct usb_host_interface *hostif;
1968         struct usb_interface_descriptor *intfd;
1969
1970         intf = umidi->iface;
1971         if (!intf || intf->num_altsetting != 2)
1972                 return;
1973
1974         hostif = &intf->altsetting[1];
1975         intfd = get_iface_desc(hostif);
1976        /* If either or both of the endpoints support interrupt transfer,
1977         * then use the alternate setting
1978         */
1979         if (intfd->bNumEndpoints != 2 ||
1980             !((get_endpoint(hostif, 0)->bmAttributes &
1981                USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT ||
1982               (get_endpoint(hostif, 1)->bmAttributes &
1983                USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT))
1984                 return;
1985
1986         dev_dbg(&umidi->dev->dev, "switching to altsetting %d with int ep\n",
1987                     intfd->bAlternateSetting);
1988         usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
1989                           intfd->bAlternateSetting);
1990
1991         umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi);
1992         if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0)
1993                 umidi->roland_load_ctl = NULL;
1994 }
1995
1996 /*
1997  * Try to find any usable endpoints in the interface.
1998  */
1999 static int snd_usbmidi_detect_endpoints(struct snd_usb_midi *umidi,
2000                                         struct snd_usb_midi_endpoint_info *endpoint,
2001                                         int max_endpoints)
2002 {
2003         struct usb_interface *intf;
2004         struct usb_host_interface *hostif;
2005         struct usb_interface_descriptor *intfd;
2006         struct usb_endpoint_descriptor *epd;
2007         int i, out_eps = 0, in_eps = 0;
2008
2009         if (USB_ID_VENDOR(umidi->usb_id) == 0x0582)
2010                 snd_usbmidi_switch_roland_altsetting(umidi);
2011
2012         if (endpoint[0].out_ep || endpoint[0].in_ep)
2013                 return 0;
2014
2015         intf = umidi->iface;
2016         if (!intf || intf->num_altsetting < 1)
2017                 return -ENOENT;
2018         hostif = intf->cur_altsetting;
2019         intfd = get_iface_desc(hostif);
2020
2021         for (i = 0; i < intfd->bNumEndpoints; ++i) {
2022                 epd = get_endpoint(hostif, i);
2023                 if (!usb_endpoint_xfer_bulk(epd) &&
2024                     !usb_endpoint_xfer_int(epd))
2025                         continue;
2026                 if (out_eps < max_endpoints &&
2027                     usb_endpoint_dir_out(epd)) {
2028                         endpoint[out_eps].out_ep = usb_endpoint_num(epd);
2029                         if (usb_endpoint_xfer_int(epd))
2030                                 endpoint[out_eps].out_interval = epd->bInterval;
2031                         ++out_eps;
2032                 }
2033                 if (in_eps < max_endpoints &&
2034                     usb_endpoint_dir_in(epd)) {
2035                         endpoint[in_eps].in_ep = usb_endpoint_num(epd);
2036                         if (usb_endpoint_xfer_int(epd))
2037                                 endpoint[in_eps].in_interval = epd->bInterval;
2038                         ++in_eps;
2039                 }
2040         }
2041         return (out_eps || in_eps) ? 0 : -ENOENT;
2042 }
2043
2044 /*
2045  * Detects the endpoints for one-port-per-endpoint protocols.
2046  */
2047 static int snd_usbmidi_detect_per_port_endpoints(struct snd_usb_midi *umidi,
2048                                                  struct snd_usb_midi_endpoint_info *endpoints)
2049 {
2050         int err, i;
2051
2052         err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS);
2053         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2054                 if (endpoints[i].out_ep)
2055                         endpoints[i].out_cables = 0x0001;
2056                 if (endpoints[i].in_ep)
2057                         endpoints[i].in_cables = 0x0001;
2058         }
2059         return err;
2060 }
2061
2062 /*
2063  * Detects the endpoints and ports of Yamaha devices.
2064  */
2065 static int snd_usbmidi_detect_yamaha(struct snd_usb_midi *umidi,
2066                                      struct snd_usb_midi_endpoint_info *endpoint)
2067 {
2068         struct usb_interface *intf;
2069         struct usb_host_interface *hostif;
2070         struct usb_interface_descriptor *intfd;
2071         uint8_t *cs_desc;
2072
2073         intf = umidi->iface;
2074         if (!intf)
2075                 return -ENOENT;
2076         hostif = intf->altsetting;
2077         intfd = get_iface_desc(hostif);
2078         if (intfd->bNumEndpoints < 1)
2079                 return -ENOENT;
2080
2081         /*
2082          * For each port there is one MIDI_IN/OUT_JACK descriptor, not
2083          * necessarily with any useful contents.  So simply count 'em.
2084          */
2085         for (cs_desc = hostif->extra;
2086              cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
2087              cs_desc += cs_desc[0]) {
2088                 if (cs_desc[1] == USB_DT_CS_INTERFACE) {
2089                         if (cs_desc[2] == UAC_MIDI_IN_JACK)
2090                                 endpoint->in_cables =
2091                                         (endpoint->in_cables << 1) | 1;
2092                         else if (cs_desc[2] == UAC_MIDI_OUT_JACK)
2093                                 endpoint->out_cables =
2094                                         (endpoint->out_cables << 1) | 1;
2095                 }
2096         }
2097         if (!endpoint->in_cables && !endpoint->out_cables)
2098                 return -ENOENT;
2099
2100         return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
2101 }
2102
2103 /*
2104  * Detects the endpoints and ports of Roland devices.
2105  */
2106 static int snd_usbmidi_detect_roland(struct snd_usb_midi *umidi,
2107                                      struct snd_usb_midi_endpoint_info *endpoint)
2108 {
2109         struct usb_interface *intf;
2110         struct usb_host_interface *hostif;
2111         u8 *cs_desc;
2112
2113         intf = umidi->iface;
2114         if (!intf)
2115                 return -ENOENT;
2116         hostif = intf->altsetting;
2117         /*
2118          * Some devices have a descriptor <06 24 F1 02 <inputs> <outputs>>,
2119          * some have standard class descriptors, or both kinds, or neither.
2120          */
2121         for (cs_desc = hostif->extra;
2122              cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
2123              cs_desc += cs_desc[0]) {
2124                 if (cs_desc[0] >= 6 &&
2125                     cs_desc[1] == USB_DT_CS_INTERFACE &&
2126                     cs_desc[2] == 0xf1 &&
2127                     cs_desc[3] == 0x02) {
2128                         if (cs_desc[4] > 0x10 || cs_desc[5] > 0x10)
2129                                 continue;
2130                         endpoint->in_cables  = (1 << cs_desc[4]) - 1;
2131                         endpoint->out_cables = (1 << cs_desc[5]) - 1;
2132                         return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
2133                 } else if (cs_desc[0] >= 7 &&
2134                            cs_desc[1] == USB_DT_CS_INTERFACE &&
2135                            cs_desc[2] == UAC_HEADER) {
2136                         return snd_usbmidi_get_ms_info(umidi, endpoint);
2137                 }
2138         }
2139
2140         return -ENODEV;
2141 }
2142
2143 /*
2144  * Creates the endpoints and their ports for Midiman devices.
2145  */
2146 static int snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi *umidi,
2147                                                 struct snd_usb_midi_endpoint_info *endpoint)
2148 {
2149         struct snd_usb_midi_endpoint_info ep_info;
2150         struct usb_interface *intf;
2151         struct usb_host_interface *hostif;
2152         struct usb_interface_descriptor *intfd;
2153         struct usb_endpoint_descriptor *epd;
2154         int cable, err;
2155
2156         intf = umidi->iface;
2157         if (!intf)
2158                 return -ENOENT;
2159         hostif = intf->altsetting;
2160         intfd = get_iface_desc(hostif);
2161         /*
2162          * The various MidiSport devices have more or less random endpoint
2163          * numbers, so we have to identify the endpoints by their index in
2164          * the descriptor array, like the driver for that other OS does.
2165          *
2166          * There is one interrupt input endpoint for all input ports, one
2167          * bulk output endpoint for even-numbered ports, and one for odd-
2168          * numbered ports.  Both bulk output endpoints have corresponding
2169          * input bulk endpoints (at indices 1 and 3) which aren't used.
2170          */
2171         if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) {
2172                 dev_dbg(&umidi->dev->dev, "not enough endpoints\n");
2173                 return -ENOENT;
2174         }
2175
2176         epd = get_endpoint(hostif, 0);
2177         if (!usb_endpoint_dir_in(epd) || !usb_endpoint_xfer_int(epd)) {
2178                 dev_dbg(&umidi->dev->dev, "endpoint[0] isn't interrupt\n");
2179                 return -ENXIO;
2180         }
2181         epd = get_endpoint(hostif, 2);
2182         if (!usb_endpoint_dir_out(epd) || !usb_endpoint_xfer_bulk(epd)) {
2183                 dev_dbg(&umidi->dev->dev, "endpoint[2] isn't bulk output\n");
2184                 return -ENXIO;
2185         }
2186         if (endpoint->out_cables > 0x0001) {
2187                 epd = get_endpoint(hostif, 4);
2188                 if (!usb_endpoint_dir_out(epd) ||
2189                     !usb_endpoint_xfer_bulk(epd)) {
2190                         dev_dbg(&umidi->dev->dev,
2191                                 "endpoint[4] isn't bulk output\n");
2192                         return -ENXIO;
2193                 }
2194         }
2195
2196         ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress &
2197                 USB_ENDPOINT_NUMBER_MASK;
2198         ep_info.out_interval = 0;
2199         ep_info.out_cables = endpoint->out_cables & 0x5555;
2200         err = snd_usbmidi_out_endpoint_create(umidi, &ep_info,
2201                                               &umidi->endpoints[0]);
2202         if (err < 0)
2203                 return err;
2204
2205         ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress &
2206                 USB_ENDPOINT_NUMBER_MASK;
2207         ep_info.in_interval = get_endpoint(hostif, 0)->bInterval;
2208         ep_info.in_cables = endpoint->in_cables;
2209         err = snd_usbmidi_in_endpoint_create(umidi, &ep_info,
2210                                              &umidi->endpoints[0]);
2211         if (err < 0)
2212                 return err;
2213
2214         if (endpoint->out_cables > 0x0001) {
2215                 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress &
2216                         USB_ENDPOINT_NUMBER_MASK;
2217                 ep_info.out_cables = endpoint->out_cables & 0xaaaa;
2218                 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info,
2219                                                       &umidi->endpoints[1]);
2220                 if (err < 0)
2221                         return err;
2222         }
2223
2224         for (cable = 0; cable < 0x10; ++cable) {
2225                 if (endpoint->out_cables & (1 << cable))
2226                         snd_usbmidi_init_substream(umidi,
2227                                                    SNDRV_RAWMIDI_STREAM_OUTPUT,
2228                                                    cable,
2229                                                    &umidi->endpoints[cable & 1].out->ports[cable].substream);
2230                 if (endpoint->in_cables & (1 << cable))
2231                         snd_usbmidi_init_substream(umidi,
2232                                                    SNDRV_RAWMIDI_STREAM_INPUT,
2233                                                    cable,
2234                                                    &umidi->endpoints[0].in->ports[cable].substream);
2235         }
2236         return 0;
2237 }
2238
2239 static const struct snd_rawmidi_global_ops snd_usbmidi_ops = {
2240         .get_port_info = snd_usbmidi_get_port_info,
2241 };
2242
2243 static int snd_usbmidi_create_rawmidi(struct snd_usb_midi *umidi,
2244                                       int out_ports, int in_ports)
2245 {
2246         struct snd_rawmidi *rmidi;
2247         int err;
2248
2249         err = snd_rawmidi_new(umidi->card, "USB MIDI",
2250                               umidi->next_midi_device++,
2251                               out_ports, in_ports, &rmidi);
2252         if (err < 0)
2253                 return err;
2254         strcpy(rmidi->name, umidi->card->shortname);
2255         rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
2256                             SNDRV_RAWMIDI_INFO_INPUT |
2257                             SNDRV_RAWMIDI_INFO_DUPLEX;
2258         rmidi->ops = &snd_usbmidi_ops;
2259         rmidi->private_data = umidi;
2260         rmidi->private_free = snd_usbmidi_rawmidi_free;
2261         snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
2262                             &snd_usbmidi_output_ops);
2263         snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
2264                             &snd_usbmidi_input_ops);
2265
2266         umidi->rmidi = rmidi;
2267         return 0;
2268 }
2269
2270 /*
2271  * Temporarily stop input.
2272  */
2273 void snd_usbmidi_input_stop(struct list_head *p)
2274 {
2275         struct snd_usb_midi *umidi;
2276         unsigned int i, j;
2277
2278         umidi = list_entry(p, struct snd_usb_midi, list);
2279         if (!umidi->input_running)
2280                 return;
2281         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2282                 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
2283                 if (ep->in)
2284                         for (j = 0; j < INPUT_URBS; ++j)
2285                                 usb_kill_urb(ep->in->urbs[j]);
2286         }
2287         umidi->input_running = 0;
2288 }
2289 EXPORT_SYMBOL(snd_usbmidi_input_stop);
2290
2291 static void snd_usbmidi_input_start_ep(struct snd_usb_midi *umidi,
2292                                        struct snd_usb_midi_in_endpoint *ep)
2293 {
2294         unsigned int i;
2295         unsigned long flags;
2296
2297         if (!ep)
2298                 return;
2299         for (i = 0; i < INPUT_URBS; ++i) {
2300                 struct urb *urb = ep->urbs[i];
2301                 spin_lock_irqsave(&umidi->disc_lock, flags);
2302                 if (!atomic_read(&urb->use_count)) {
2303                         urb->dev = ep->umidi->dev;
2304                         snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
2305                 }
2306                 spin_unlock_irqrestore(&umidi->disc_lock, flags);
2307         }
2308 }
2309
2310 /*
2311  * Resume input after a call to snd_usbmidi_input_stop().
2312  */
2313 void snd_usbmidi_input_start(struct list_head *p)
2314 {
2315         struct snd_usb_midi *umidi;
2316         int i;
2317
2318         umidi = list_entry(p, struct snd_usb_midi, list);
2319         if (umidi->input_running || !umidi->opened[1])
2320                 return;
2321         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
2322                 snd_usbmidi_input_start_ep(umidi, umidi->endpoints[i].in);
2323         umidi->input_running = 1;
2324 }
2325 EXPORT_SYMBOL(snd_usbmidi_input_start);
2326
2327 /*
2328  * Prepare for suspend. Typically called from the USB suspend callback.
2329  */
2330 void snd_usbmidi_suspend(struct list_head *p)
2331 {
2332         struct snd_usb_midi *umidi;
2333
2334         umidi = list_entry(p, struct snd_usb_midi, list);
2335         mutex_lock(&umidi->mutex);
2336         snd_usbmidi_input_stop(p);
2337         mutex_unlock(&umidi->mutex);
2338 }
2339 EXPORT_SYMBOL(snd_usbmidi_suspend);
2340
2341 /*
2342  * Resume. Typically called from the USB resume callback.
2343  */
2344 void snd_usbmidi_resume(struct list_head *p)
2345 {
2346         struct snd_usb_midi *umidi;
2347
2348         umidi = list_entry(p, struct snd_usb_midi, list);
2349         mutex_lock(&umidi->mutex);
2350         snd_usbmidi_input_start(p);
2351         mutex_unlock(&umidi->mutex);
2352 }
2353 EXPORT_SYMBOL(snd_usbmidi_resume);
2354
2355 /*
2356  * Creates and registers everything needed for a MIDI streaming interface.
2357  */
2358 int __snd_usbmidi_create(struct snd_card *card,
2359                          struct usb_interface *iface,
2360                          struct list_head *midi_list,
2361                          const struct snd_usb_audio_quirk *quirk,
2362                          unsigned int usb_id)
2363 {
2364         struct snd_usb_midi *umidi;
2365         struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS];
2366         int out_ports, in_ports;
2367         int i, err;
2368
2369         umidi = kzalloc(sizeof(*umidi), GFP_KERNEL);
2370         if (!umidi)
2371                 return -ENOMEM;
2372         umidi->dev = interface_to_usbdev(iface);
2373         umidi->card = card;
2374         umidi->iface = iface;
2375         umidi->quirk = quirk;
2376         umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
2377         spin_lock_init(&umidi->disc_lock);
2378         init_rwsem(&umidi->disc_rwsem);
2379         mutex_init(&umidi->mutex);
2380         if (!usb_id)
2381                 usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor),
2382                                le16_to_cpu(umidi->dev->descriptor.idProduct));
2383         umidi->usb_id = usb_id;
2384         setup_timer(&umidi->error_timer, snd_usbmidi_error_timer,
2385                     (unsigned long)umidi);
2386
2387         /* detect the endpoint(s) to use */
2388         memset(endpoints, 0, sizeof(endpoints));
2389         switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) {
2390         case QUIRK_MIDI_STANDARD_INTERFACE:
2391                 err = snd_usbmidi_get_ms_info(umidi, endpoints);
2392                 if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */
2393                         umidi->usb_protocol_ops =
2394                                 &snd_usbmidi_maudio_broken_running_status_ops;
2395                 break;
2396         case QUIRK_MIDI_US122L:
2397                 umidi->usb_protocol_ops = &snd_usbmidi_122l_ops;
2398                 /* fall through */
2399         case QUIRK_MIDI_FIXED_ENDPOINT:
2400                 memcpy(&endpoints[0], quirk->data,
2401                        sizeof(struct snd_usb_midi_endpoint_info));
2402                 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2403                 break;
2404         case QUIRK_MIDI_YAMAHA:
2405                 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]);
2406                 break;
2407         case QUIRK_MIDI_ROLAND:
2408                 err = snd_usbmidi_detect_roland(umidi, &endpoints[0]);
2409                 break;
2410         case QUIRK_MIDI_MIDIMAN:
2411                 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
2412                 memcpy(&endpoints[0], quirk->data,
2413                        sizeof(struct snd_usb_midi_endpoint_info));
2414                 err = 0;
2415                 break;
2416         case QUIRK_MIDI_NOVATION:
2417                 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
2418                 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2419                 break;
2420         case QUIRK_MIDI_RAW_BYTES:
2421                 umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;
2422                 /*
2423                  * Interface 1 contains isochronous endpoints, but with the same
2424                  * numbers as in interface 0.  Since it is interface 1 that the
2425                  * USB core has most recently seen, these descriptors are now
2426                  * associated with the endpoint numbers.  This will foul up our
2427                  * attempts to submit bulk/interrupt URBs to the endpoints in
2428                  * interface 0, so we have to make sure that the USB core looks
2429                  * again at interface 0 by calling usb_set_interface() on it.
2430                  */
2431                 if (umidi->usb_id == USB_ID(0x07fd, 0x0001)) /* MOTU Fastlane */
2432                         usb_set_interface(umidi->dev, 0, 0);
2433                 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2434                 break;
2435         case QUIRK_MIDI_EMAGIC:
2436                 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops;
2437                 memcpy(&endpoints[0], quirk->data,
2438                        sizeof(struct snd_usb_midi_endpoint_info));
2439                 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2440                 break;
2441         case QUIRK_MIDI_CME:
2442                 umidi->usb_protocol_ops = &snd_usbmidi_cme_ops;
2443                 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2444                 break;
2445         case QUIRK_MIDI_AKAI:
2446                 umidi->usb_protocol_ops = &snd_usbmidi_akai_ops;
2447                 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2448                 /* endpoint 1 is input-only */
2449                 endpoints[1].out_cables = 0;
2450                 break;
2451         case QUIRK_MIDI_FTDI:
2452                 umidi->usb_protocol_ops = &snd_usbmidi_ftdi_ops;
2453
2454                 /* set baud rate to 31250 (48 MHz / 16 / 96) */
2455                 err = usb_control_msg(umidi->dev, usb_sndctrlpipe(umidi->dev, 0),
2456                                       3, 0x40, 0x60, 0, NULL, 0, 1000);
2457                 if (err < 0)
2458                         break;
2459
2460                 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2461                 break;
2462         case QUIRK_MIDI_CH345:
2463                 umidi->usb_protocol_ops = &snd_usbmidi_ch345_broken_sysex_ops;
2464                 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2465                 break;
2466         default:
2467                 dev_err(&umidi->dev->dev, "invalid quirk type %d\n",
2468                         quirk->type);
2469                 err = -ENXIO;
2470                 break;
2471         }
2472         if (err < 0)
2473                 goto free_midi;
2474
2475         /* create rawmidi device */
2476         out_ports = 0;
2477         in_ports = 0;
2478         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2479                 out_ports += hweight16(endpoints[i].out_cables);
2480                 in_ports += hweight16(endpoints[i].in_cables);
2481         }
2482         err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports);
2483         if (err < 0)
2484                 goto free_midi;
2485
2486         /* create endpoint/port structures */
2487         if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN)
2488                 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]);
2489         else
2490                 err = snd_usbmidi_create_endpoints(umidi, endpoints);
2491         if (err < 0)
2492                 goto exit;
2493
2494         usb_autopm_get_interface_no_resume(umidi->iface);
2495
2496         list_add_tail(&umidi->list, midi_list);
2497         return 0;
2498
2499 free_midi:
2500         kfree(umidi);
2501 exit:
2502         return err;
2503 }
2504 EXPORT_SYMBOL(__snd_usbmidi_create);