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