SAFE public projects git trees. - safe/jmp/linux-2.6/blob - sound/usb/usbmidi.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
  51 #include <sound/core.h>
  52 #include <sound/control.h>
  53 #include <sound/rawmidi.h>
  54 #include <sound/asequencer.h>
  55 #include "usbaudio.h"
  56
  57
  58 /*
  59  * define this to log all USB packets
  60  */
  61 /* #define DUMP_PACKETS */
  62
  63 /*
  64  * how long to wait after some USB errors, so that khubd can disconnect() us
  65  * without too many spurious errors
  66  */
  67 #define ERROR_DELAY_JIFFIES (HZ / 10)
  68
  69 #define OUTPUT_URBS 7
  70 #define INPUT_URBS 7
  71
  72
  73 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
  74 MODULE_DESCRIPTION("USB Audio/MIDI helper module");
  75 MODULE_LICENSE("Dual BSD/GPL");
  76
  77
  78 struct usb_ms_header_descriptor {
  79         __u8  bLength;
  80         __u8  bDescriptorType;
  81         __u8  bDescriptorSubtype;
  82         __u8  bcdMSC[2];
  83         __le16 wTotalLength;
  84 } __attribute__ ((packed));
  85
  86 struct usb_ms_endpoint_descriptor {
  87         __u8  bLength;
  88         __u8  bDescriptorType;
  89         __u8  bDescriptorSubtype;
  90         __u8  bNumEmbMIDIJack;
  91         __u8  baAssocJackID[0];
  92 } __attribute__ ((packed));
  93
  94 struct snd_usb_midi_in_endpoint;
  95 struct snd_usb_midi_out_endpoint;
  96 struct snd_usb_midi_endpoint;
  97
  98 struct usb_protocol_ops {
  99         void (*input)(struct snd_usb_midi_in_endpoint*, uint8_t*, int);
 100         void (*output)(struct snd_usb_midi_out_endpoint *ep, struct urb *urb);
 101         void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t);
 102         void (*init_out_endpoint)(struct snd_usb_midi_out_endpoint*);
 103         void (*finish_out_endpoint)(struct snd_usb_midi_out_endpoint*);
 104 };
 105
 106 struct snd_usb_midi {
 107         struct usb_device *dev;
 108         struct snd_card *card;
 109         struct usb_interface *iface;
 110         const struct snd_usb_audio_quirk *quirk;
 111         struct snd_rawmidi *rmidi;
 112         struct usb_protocol_ops* usb_protocol_ops;
 113         struct list_head list;
 114         struct timer_list error_timer;
 115         spinlock_t disc_lock;
 116         struct mutex mutex;
 117         u32 usb_id;
 118         int next_midi_device;
 119
 120         struct snd_usb_midi_endpoint {
 121                 struct snd_usb_midi_out_endpoint *out;
 122                 struct snd_usb_midi_in_endpoint *in;
 123         } endpoints[MIDI_MAX_ENDPOINTS];
 124         unsigned long input_triggered;
 125         unsigned int opened;
 126         unsigned char disconnected;
 127
 128         struct snd_kcontrol *roland_load_ctl;
 129 };
 130
 131 struct snd_usb_midi_out_endpoint {
 132         struct snd_usb_midi* umidi;
 133         struct out_urb_context {
 134                 struct urb *urb;
 135                 struct snd_usb_midi_out_endpoint *ep;
 136         } urbs[OUTPUT_URBS];
 137         unsigned int active_urbs;
 138         unsigned int drain_urbs;
 139         int max_transfer;               /* size of urb buffer */
 140         struct tasklet_struct tasklet;
 141         unsigned int next_urb;
 142         spinlock_t buffer_lock;
 143
 144         struct usbmidi_out_port {
 145                 struct snd_usb_midi_out_endpoint* ep;
 146                 struct snd_rawmidi_substream *substream;
 147                 int active;
 148                 uint8_t cable;          /* cable number << 4 */
 149                 uint8_t state;
 150 #define STATE_UNKNOWN   0
 151 #define STATE_1PARAM    1
 152 #define STATE_2PARAM_1  2
 153 #define STATE_2PARAM_2  3
 154 #define STATE_SYSEX_0   4
 155 #define STATE_SYSEX_1   5
 156 #define STATE_SYSEX_2   6
 157                 uint8_t data[2];
 158         } ports[0x10];
 159         int current_port;
 160
 161         wait_queue_head_t drain_wait;
 162 };
 163
 164 struct snd_usb_midi_in_endpoint {
 165         struct snd_usb_midi* umidi;
 166         struct urb* urbs[INPUT_URBS];
 167         struct usbmidi_in_port {
 168                 struct snd_rawmidi_substream *substream;
 169                 u8 running_status_length;
 170         } ports[0x10];
 171         u8 seen_f5;
 172         u8 error_resubmit;
 173         int current_port;
 174 };
 175
 176 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint* ep);
 177
 178 static const uint8_t snd_usbmidi_cin_length[] = {
 179         0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
 180 };
 181
 182 /*
 183  * Submits the URB, with error handling.
 184  */
 185 static int snd_usbmidi_submit_urb(struct urb* urb, gfp_t flags)
 186 {
 187         int err = usb_submit_urb(urb, flags);
 188         if (err < 0 && err != -ENODEV)
 189                 snd_printk(KERN_ERR "usb_submit_urb: %d\n", err);
 190         return err;
 191 }
 192
 193 /*
 194  * Error handling for URB completion functions.
 195  */
 196 static int snd_usbmidi_urb_error(int status)
 197 {
 198         switch (status) {
 199         /* manually unlinked, or device gone */
 200         case -ENOENT:
 201         case -ECONNRESET:
 202         case -ESHUTDOWN:
 203         case -ENODEV:
 204                 return -ENODEV;
 205         /* errors that might occur during unplugging */
 206         case -EPROTO:
 207         case -ETIME:
 208         case -EILSEQ:
 209                 return -EIO;
 210         default:
 211                 snd_printk(KERN_ERR "urb status %d\n", status);
 212                 return 0; /* continue */
 213         }
 214 }
 215
 216 /*
 217  * Receives a chunk of MIDI data.
 218  */
 219 static void snd_usbmidi_input_data(struct snd_usb_midi_in_endpoint* ep, int portidx,
 220                                    uint8_t* data, int length)
 221 {
 222         struct usbmidi_in_port* port = &ep->ports[portidx];
 223
 224         if (!port->substream) {
 225                 snd_printd("unexpected port %d!\n", portidx);
 226                 return;
 227         }
 228         if (!test_bit(port->substream->number, &ep->umidi->input_triggered))
 229                 return;
 230         snd_rawmidi_receive(port->substream, data, length);
 231 }
 232
 233 #ifdef DUMP_PACKETS
 234 static void dump_urb(const char *type, const u8 *data, int length)
 235 {
 236         snd_printk(KERN_DEBUG "%s packet: [", type);
 237         for (; length > 0; ++data, --length)
 238                 printk(" %02x", *data);
 239         printk(" ]\n");
 240 }
 241 #else
 242 #define dump_urb(type, data, length) /* nothing */
 243 #endif
 244
 245 /*
 246  * Processes the data read from the device.
 247  */
 248 static void snd_usbmidi_in_urb_complete(struct urb* urb)
 249 {
 250         struct snd_usb_midi_in_endpoint* ep = urb->context;
 251
 252         if (urb->status == 0) {
 253                 dump_urb("received", urb->transfer_buffer, urb->actual_length);
 254                 ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer,
 255                                                    urb->actual_length);
 256         } else {
 257                 int err = snd_usbmidi_urb_error(urb->status);
 258                 if (err < 0) {
 259                         if (err != -ENODEV) {
 260                                 ep->error_resubmit = 1;
 261                                 mod_timer(&ep->umidi->error_timer,
 262                                           jiffies + ERROR_DELAY_JIFFIES);
 263                         }
 264                         return;
 265                 }
 266         }
 267
 268         urb->dev = ep->umidi->dev;
 269         snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
 270 }
 271
 272 static void snd_usbmidi_out_urb_complete(struct urb* urb)
 273 {
 274         struct out_urb_context *context = urb->context;
 275         struct snd_usb_midi_out_endpoint* ep = context->ep;
 276         unsigned int urb_index;
 277
 278         spin_lock(&ep->buffer_lock);
 279         urb_index = context - ep->urbs;
 280         ep->active_urbs &= ~(1 << urb_index);
 281         if (unlikely(ep->drain_urbs)) {
 282                 ep->drain_urbs &= ~(1 << urb_index);
 283                 wake_up(&ep->drain_wait);
 284         }
 285         spin_unlock(&ep->buffer_lock);
 286         if (urb->status < 0) {
 287                 int err = snd_usbmidi_urb_error(urb->status);
 288                 if (err < 0) {
 289                         if (err != -ENODEV)
 290                                 mod_timer(&ep->umidi->error_timer,
 291                                           jiffies + ERROR_DELAY_JIFFIES);
 292                         return;
 293                 }
 294         }
 295         snd_usbmidi_do_output(ep);
 296 }
 297
 298 /*
 299  * This is called when some data should be transferred to the device
 300  * (from one or more substreams).
 301  */
 302 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint* ep)
 303 {
 304         unsigned int urb_index;
 305         struct urb* urb;
 306         unsigned long flags;
 307
 308         spin_lock_irqsave(&ep->buffer_lock, flags);
 309         if (ep->umidi->disconnected) {
 310                 spin_unlock_irqrestore(&ep->buffer_lock, flags);
 311                 return;
 312         }
 313
 314         urb_index = ep->next_urb;
 315         for (;;) {
 316                 if (!(ep->active_urbs & (1 << urb_index))) {
 317                         urb = ep->urbs[urb_index].urb;
 318                         urb->transfer_buffer_length = 0;
 319                         ep->umidi->usb_protocol_ops->output(ep, urb);
 320                         if (urb->transfer_buffer_length == 0)
 321                                 break;
 322
 323                         dump_urb("sending", urb->transfer_buffer,
 324                                  urb->transfer_buffer_length);
 325                         urb->dev = ep->umidi->dev;
 326                         if (snd_usbmidi_submit_urb(urb, GFP_ATOMIC) < 0)
 327                                 break;
 328                         ep->active_urbs |= 1 << urb_index;
 329                 }
 330                 if (++urb_index >= OUTPUT_URBS)
 331                         urb_index = 0;
 332                 if (urb_index == ep->next_urb)
 333                         break;
 334         }
 335         ep->next_urb = urb_index;
 336         spin_unlock_irqrestore(&ep->buffer_lock, flags);
 337 }
 338
 339 static void snd_usbmidi_out_tasklet(unsigned long data)
 340 {
 341         struct snd_usb_midi_out_endpoint* ep = (struct snd_usb_midi_out_endpoint *) data;
 342
 343         snd_usbmidi_do_output(ep);
 344 }
 345
 346 /* called after transfers had been interrupted due to some USB error */
 347 static void snd_usbmidi_error_timer(unsigned long data)
 348 {
 349         struct snd_usb_midi *umidi = (struct snd_usb_midi *)data;
 350         unsigned int i, j;
 351
 352         spin_lock(&umidi->disc_lock);
 353         if (umidi->disconnected) {
 354                 spin_unlock(&umidi->disc_lock);
 355                 return;
 356         }
 357         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
 358                 struct snd_usb_midi_in_endpoint *in = umidi->endpoints[i].in;
 359                 if (in && in->error_resubmit) {
 360                         in->error_resubmit = 0;
 361                         for (j = 0; j < INPUT_URBS; ++j) {
 362                                 in->urbs[j]->dev = umidi->dev;
 363                                 snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC);
 364                         }
 365                 }
 366                 if (umidi->endpoints[i].out)
 367                         snd_usbmidi_do_output(umidi->endpoints[i].out);
 368         }
 369         spin_unlock(&umidi->disc_lock);
 370 }
 371
 372 /* helper function to send static data that may not DMA-able */
 373 static int send_bulk_static_data(struct snd_usb_midi_out_endpoint* ep,
 374                                  const void *data, int len)
 375 {
 376         int err = 0;
 377         void *buf = kmemdup(data, len, GFP_KERNEL);
 378         if (!buf)
 379                 return -ENOMEM;
 380         dump_urb("sending", buf, len);
 381         if (ep->urbs[0].urb)
 382                 err = usb_bulk_msg(ep->umidi->dev, ep->urbs[0].urb->pipe,
 383                                    buf, len, NULL, 250);
 384         kfree(buf);
 385         return err;
 386 }
 387
 388 /*
 389  * Standard USB MIDI protocol: see the spec.
 390  * Midiman protocol: like the standard protocol, but the control byte is the
 391  * fourth byte in each packet, and uses length instead of CIN.
 392  */
 393
 394 static void snd_usbmidi_standard_input(struct snd_usb_midi_in_endpoint* ep,
 395                                        uint8_t* buffer, int buffer_length)
 396 {
 397         int i;
 398
 399         for (i = 0; i + 3 < buffer_length; i += 4)
 400                 if (buffer[i] != 0) {
 401                         int cable = buffer[i] >> 4;
 402                         int length = snd_usbmidi_cin_length[buffer[i] & 0x0f];
 403                         snd_usbmidi_input_data(ep, cable, &buffer[i + 1], length);
 404                 }
 405 }
 406
 407 static void snd_usbmidi_midiman_input(struct snd_usb_midi_in_endpoint* ep,
 408                                       uint8_t* buffer, int buffer_length)
 409 {
 410         int i;
 411
 412         for (i = 0; i + 3 < buffer_length; i += 4)
 413                 if (buffer[i + 3] != 0) {
 414                         int port = buffer[i + 3] >> 4;
 415                         int length = buffer[i + 3] & 3;
 416                         snd_usbmidi_input_data(ep, port, &buffer[i], length);
 417                 }
 418 }
 419
 420 /*
 421  * Buggy M-Audio device: running status on input results in a packet that has
 422  * the data bytes but not the status byte and that is marked with CIN 4.
 423  */
 424 static void snd_usbmidi_maudio_broken_running_status_input(
 425                                         struct snd_usb_midi_in_endpoint* ep,
 426                                         uint8_t* buffer, int buffer_length)
 427 {
 428         int i;
 429
 430         for (i = 0; i + 3 < buffer_length; i += 4)
 431                 if (buffer[i] != 0) {
 432                         int cable = buffer[i] >> 4;
 433                         u8 cin = buffer[i] & 0x0f;
 434                         struct usbmidi_in_port *port = &ep->ports[cable];
 435                         int length;
 436
 437                         length = snd_usbmidi_cin_length[cin];
 438                         if (cin == 0xf && buffer[i + 1] >= 0xf8)
 439                                 ; /* realtime msg: no running status change */
 440                         else if (cin >= 0x8 && cin <= 0xe)
 441                                 /* channel msg */
 442                                 port->running_status_length = length - 1;
 443                         else if (cin == 0x4 &&
 444                                  port->running_status_length != 0 &&
 445                                  buffer[i + 1] < 0x80)
 446                                 /* CIN 4 that is not a SysEx */
 447                                 length = port->running_status_length;
 448                         else
 449                                 /*
 450                                  * All other msgs cannot begin running status.
 451                                  * (A channel msg sent as two or three CIN 0xF
 452                                  * packets could in theory, but this device
 453                                  * doesn't use this format.)
 454                                  */
 455                                 port->running_status_length = 0;
 456                         snd_usbmidi_input_data(ep, cable, &buffer[i + 1], length);
 457                 }
 458 }
 459
 460 /*
 461  * CME protocol: like the standard protocol, but SysEx commands are sent as a
 462  * single USB packet preceded by a 0x0F byte.
 463  */
 464 static void snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint *ep,
 465                                   uint8_t *buffer, int buffer_length)
 466 {
 467         if (buffer_length < 2 || (buffer[0] & 0x0f) != 0x0f)
 468                 snd_usbmidi_standard_input(ep, buffer, buffer_length);
 469         else
 470                 snd_usbmidi_input_data(ep, buffer[0] >> 4,
 471                                        &buffer[1], buffer_length - 1);
 472 }
 473
 474 /*
 475  * Adds one USB MIDI packet to the output buffer.
 476  */
 477 static void snd_usbmidi_output_standard_packet(struct urb* urb, uint8_t p0,
 478                                                uint8_t p1, uint8_t p2, uint8_t p3)
 479 {
 480
 481         uint8_t* buf = (uint8_t*)urb->transfer_buffer + urb->transfer_buffer_length;
 482         buf[0] = p0;
 483         buf[1] = p1;
 484         buf[2] = p2;
 485         buf[3] = p3;
 486         urb->transfer_buffer_length += 4;
 487 }
 488
 489 /*
 490  * Adds one Midiman packet to the output buffer.
 491  */
 492 static void snd_usbmidi_output_midiman_packet(struct urb* urb, uint8_t p0,
 493                                               uint8_t p1, uint8_t p2, uint8_t p3)
 494 {
 495
 496         uint8_t* buf = (uint8_t*)urb->transfer_buffer + urb->transfer_buffer_length;
 497         buf[0] = p1;
 498         buf[1] = p2;
 499         buf[2] = p3;
 500         buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f];
 501         urb->transfer_buffer_length += 4;
 502 }
 503
 504 /*
 505  * Converts MIDI commands to USB MIDI packets.
 506  */
 507 static void snd_usbmidi_transmit_byte(struct usbmidi_out_port* port,
 508                                       uint8_t b, struct urb* urb)
 509 {
 510         uint8_t p0 = port->cable;
 511         void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) =
 512                 port->ep->umidi->usb_protocol_ops->output_packet;
 513
 514         if (b >= 0xf8) {
 515                 output_packet(urb, p0 | 0x0f, b, 0, 0);
 516         } else if (b >= 0xf0) {
 517                 switch (b) {
 518                 case 0xf0:
 519                         port->data[0] = b;
 520                         port->state = STATE_SYSEX_1;
 521                         break;
 522                 case 0xf1:
 523                 case 0xf3:
 524                         port->data[0] = b;
 525                         port->state = STATE_1PARAM;
 526                         break;
 527                 case 0xf2:
 528                         port->data[0] = b;
 529                         port->state = STATE_2PARAM_1;
 530                         break;
 531                 case 0xf4:
 532                 case 0xf5:
 533                         port->state = STATE_UNKNOWN;
 534                         break;
 535                 case 0xf6:
 536                         output_packet(urb, p0 | 0x05, 0xf6, 0, 0);
 537                         port->state = STATE_UNKNOWN;
 538                         break;
 539                 case 0xf7:
 540                         switch (port->state) {
 541                         case STATE_SYSEX_0:
 542                                 output_packet(urb, p0 | 0x05, 0xf7, 0, 0);
 543                                 break;
 544                         case STATE_SYSEX_1:
 545                                 output_packet(urb, p0 | 0x06, port->data[0], 0xf7, 0);
 546                                 break;
 547                         case STATE_SYSEX_2:
 548                                 output_packet(urb, p0 | 0x07, port->data[0], port->data[1], 0xf7);
 549                                 break;
 550                         }
 551                         port->state = STATE_UNKNOWN;
 552                         break;
 553                 }
 554         } else if (b >= 0x80) {
 555                 port->data[0] = b;
 556                 if (b >= 0xc0 && b <= 0xdf)
 557                         port->state = STATE_1PARAM;
 558                 else
 559                         port->state = STATE_2PARAM_1;
 560         } else { /* b < 0x80 */
 561                 switch (port->state) {
 562                 case STATE_1PARAM:
 563                         if (port->data[0] < 0xf0) {
 564                                 p0 |= port->data[0] >> 4;
 565                         } else {
 566                                 p0 |= 0x02;
 567                                 port->state = STATE_UNKNOWN;
 568                         }
 569                         output_packet(urb, p0, port->data[0], b, 0);
 570                         break;
 571                 case STATE_2PARAM_1:
 572                         port->data[1] = b;
 573                         port->state = STATE_2PARAM_2;
 574                         break;
 575                 case STATE_2PARAM_2:
 576                         if (port->data[0] < 0xf0) {
 577                                 p0 |= port->data[0] >> 4;
 578                                 port->state = STATE_2PARAM_1;
 579                         } else {
 580                                 p0 |= 0x03;
 581                                 port->state = STATE_UNKNOWN;
 582                         }
 583                         output_packet(urb, p0, port->data[0], port->data[1], b);
 584                         break;
 585                 case STATE_SYSEX_0:
 586                         port->data[0] = b;
 587                         port->state = STATE_SYSEX_1;
 588                         break;
 589                 case STATE_SYSEX_1:
 590                         port->data[1] = b;
 591                         port->state = STATE_SYSEX_2;
 592                         break;
 593                 case STATE_SYSEX_2:
 594                         output_packet(urb, p0 | 0x04, port->data[0], port->data[1], b);
 595                         port->state = STATE_SYSEX_0;
 596                         break;
 597                 }
 598         }
 599 }
 600
 601 static void snd_usbmidi_standard_output(struct snd_usb_midi_out_endpoint* ep,
 602                                         struct urb *urb)
 603 {
 604         int p;
 605
 606         /* FIXME: lower-numbered ports can starve higher-numbered ports */
 607         for (p = 0; p < 0x10; ++p) {
 608                 struct usbmidi_out_port* port = &ep->ports[p];
 609                 if (!port->active)
 610                         continue;
 611                 while (urb->transfer_buffer_length + 3 < ep->max_transfer) {
 612                         uint8_t b;
 613                         if (snd_rawmidi_transmit(port->substream, &b, 1) != 1) {
 614                                 port->active = 0;
 615                                 break;
 616                         }
 617                         snd_usbmidi_transmit_byte(port, b, urb);
 618                 }
 619         }
 620 }
 621
 622 static struct usb_protocol_ops snd_usbmidi_standard_ops = {
 623         .input = snd_usbmidi_standard_input,
 624         .output = snd_usbmidi_standard_output,
 625         .output_packet = snd_usbmidi_output_standard_packet,
 626 };
 627
 628 static struct usb_protocol_ops snd_usbmidi_midiman_ops = {
 629         .input = snd_usbmidi_midiman_input,
 630         .output = snd_usbmidi_standard_output,
 631         .output_packet = snd_usbmidi_output_midiman_packet,
 632 };
 633
 634 static struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = {
 635         .input = snd_usbmidi_maudio_broken_running_status_input,
 636         .output = snd_usbmidi_standard_output,
 637         .output_packet = snd_usbmidi_output_standard_packet,
 638 };
 639
 640 static struct usb_protocol_ops snd_usbmidi_cme_ops = {
 641         .input = snd_usbmidi_cme_input,
 642         .output = snd_usbmidi_standard_output,
 643         .output_packet = snd_usbmidi_output_standard_packet,
 644 };
 645
 646 /*
 647  * Novation USB MIDI protocol: number of data bytes is in the first byte
 648  * (when receiving) (+1!) or in the second byte (when sending); data begins
 649  * at the third byte.
 650  */
 651
 652 static void snd_usbmidi_novation_input(struct snd_usb_midi_in_endpoint* ep,
 653                                        uint8_t* buffer, int buffer_length)
 654 {
 655         if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1)
 656                 return;
 657         snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1);
 658 }
 659
 660 static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint* ep,
 661                                         struct urb *urb)
 662 {
 663         uint8_t* transfer_buffer;
 664         int count;
 665
 666         if (!ep->ports[0].active)
 667                 return;
 668         transfer_buffer = urb->transfer_buffer;
 669         count = snd_rawmidi_transmit(ep->ports[0].substream,
 670                                      &transfer_buffer[2],
 671                                      ep->max_transfer - 2);
 672         if (count < 1) {
 673                 ep->ports[0].active = 0;
 674                 return;
 675         }
 676         transfer_buffer[0] = 0;
 677         transfer_buffer[1] = count;
 678         urb->transfer_buffer_length = 2 + count;
 679 }
 680
 681 static struct usb_protocol_ops snd_usbmidi_novation_ops = {
 682         .input = snd_usbmidi_novation_input,
 683         .output = snd_usbmidi_novation_output,
 684 };
 685
 686 /*
 687  * "raw" protocol: used by the MOTU FastLane.
 688  */
 689
 690 static void snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint* ep,
 691                                   uint8_t* buffer, int buffer_length)
 692 {
 693         snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
 694 }
 695
 696 static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint* ep,
 697                                    struct urb *urb)
 698 {
 699         int count;
 700
 701         if (!ep->ports[0].active)
 702                 return;
 703         count = snd_rawmidi_transmit(ep->ports[0].substream,
 704                                      urb->transfer_buffer,
 705                                      ep->max_transfer);
 706         if (count < 1) {
 707                 ep->ports[0].active = 0;
 708                 return;
 709         }
 710         urb->transfer_buffer_length = count;
 711 }
 712
 713 static struct usb_protocol_ops snd_usbmidi_raw_ops = {
 714         .input = snd_usbmidi_raw_input,
 715         .output = snd_usbmidi_raw_output,
 716 };
 717
 718 static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep,
 719                                      uint8_t *buffer, int buffer_length)
 720 {
 721         if (buffer_length != 9)
 722                 return;
 723         buffer_length = 8;
 724         while (buffer_length && buffer[buffer_length - 1] == 0xFD)
 725                 buffer_length--;
 726         if (buffer_length)
 727                 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
 728 }
 729
 730 static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep,
 731                                       struct urb *urb)
 732 {
 733         int count;
 734
 735         if (!ep->ports[0].active)
 736                 return;
 737         count = snd_usb_get_speed(ep->umidi->dev) == USB_SPEED_HIGH ? 1 : 2;
 738         count = snd_rawmidi_transmit(ep->ports[0].substream,
 739                                      urb->transfer_buffer,
 740                                      count);
 741         if (count < 1) {
 742                 ep->ports[0].active = 0;
 743                 return;
 744         }
 745
 746         memset(urb->transfer_buffer + count, 0xFD, 9 - count);
 747         urb->transfer_buffer_length = count;
 748 }
 749
 750 static struct usb_protocol_ops snd_usbmidi_122l_ops = {
 751         .input = snd_usbmidi_us122l_input,
 752         .output = snd_usbmidi_us122l_output,
 753 };
 754
 755 /*
 756  * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching.
 757  */
 758
 759 static void snd_usbmidi_emagic_init_out(struct snd_usb_midi_out_endpoint* ep)
 760 {
 761         static const u8 init_data[] = {
 762                 /* initialization magic: "get version" */
 763                 0xf0,
 764                 0x00, 0x20, 0x31,       /* Emagic */
 765                 0x64,                   /* Unitor8 */
 766                 0x0b,                   /* version number request */
 767                 0x00,                   /* command version */
 768                 0x00,                   /* EEPROM, box 0 */
 769                 0xf7
 770         };
 771         send_bulk_static_data(ep, init_data, sizeof(init_data));
 772         /* while we're at it, pour on more magic */
 773         send_bulk_static_data(ep, init_data, sizeof(init_data));
 774 }
 775
 776 static void snd_usbmidi_emagic_finish_out(struct snd_usb_midi_out_endpoint* ep)
 777 {
 778         static const u8 finish_data[] = {
 779                 /* switch to patch mode with last preset */
 780                 0xf0,
 781                 0x00, 0x20, 0x31,       /* Emagic */
 782                 0x64,                   /* Unitor8 */
 783                 0x10,                   /* patch switch command */
 784                 0x00,                   /* command version */
 785                 0x7f,                   /* to all boxes */
 786                 0x40,                   /* last preset in EEPROM */
 787                 0xf7
 788         };
 789         send_bulk_static_data(ep, finish_data, sizeof(finish_data));
 790 }
 791
 792 static void snd_usbmidi_emagic_input(struct snd_usb_midi_in_endpoint* ep,
 793                                      uint8_t* buffer, int buffer_length)
 794 {
 795         int i;
 796
 797         /* FF indicates end of valid data */
 798         for (i = 0; i < buffer_length; ++i)
 799                 if (buffer[i] == 0xff) {
 800                         buffer_length = i;
 801                         break;
 802                 }
 803
 804         /* handle F5 at end of last buffer */
 805         if (ep->seen_f5)
 806                 goto switch_port;
 807
 808         while (buffer_length > 0) {
 809                 /* determine size of data until next F5 */
 810                 for (i = 0; i < buffer_length; ++i)
 811                         if (buffer[i] == 0xf5)
 812                                 break;
 813                 snd_usbmidi_input_data(ep, ep->current_port, buffer, i);
 814                 buffer += i;
 815                 buffer_length -= i;
 816
 817                 if (buffer_length <= 0)
 818                         break;
 819                 /* assert(buffer[0] == 0xf5); */
 820                 ep->seen_f5 = 1;
 821                 ++buffer;
 822                 --buffer_length;
 823
 824         switch_port:
 825                 if (buffer_length <= 0)
 826                         break;
 827                 if (buffer[0] < 0x80) {
 828                         ep->current_port = (buffer[0] - 1) & 15;
 829                         ++buffer;
 830                         --buffer_length;
 831                 }
 832                 ep->seen_f5 = 0;
 833         }
 834 }
 835
 836 static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint* ep,
 837                                       struct urb *urb)
 838 {
 839         int port0 = ep->current_port;
 840         uint8_t* buf = urb->transfer_buffer;
 841         int buf_free = ep->max_transfer;
 842         int length, i;
 843
 844         for (i = 0; i < 0x10; ++i) {
 845                 /* round-robin, starting at the last current port */
 846                 int portnum = (port0 + i) & 15;
 847                 struct usbmidi_out_port* port = &ep->ports[portnum];
 848
 849                 if (!port->active)
 850                         continue;
 851                 if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) {
 852                         port->active = 0;
 853                         continue;
 854                 }
 855
 856                 if (portnum != ep->current_port) {
 857                         if (buf_free < 2)
 858                                 break;
 859                         ep->current_port = portnum;
 860                         buf[0] = 0xf5;
 861                         buf[1] = (portnum + 1) & 15;
 862                         buf += 2;
 863                         buf_free -= 2;
 864                 }
 865
 866                 if (buf_free < 1)
 867                         break;
 868                 length = snd_rawmidi_transmit(port->substream, buf, buf_free);
 869                 if (length > 0) {
 870                         buf += length;
 871                         buf_free -= length;
 872                         if (buf_free < 1)
 873                                 break;
 874                 }
 875         }
 876         if (buf_free < ep->max_transfer && buf_free > 0) {
 877                 *buf = 0xff;
 878                 --buf_free;
 879         }
 880         urb->transfer_buffer_length = ep->max_transfer - buf_free;
 881 }
 882
 883 static struct usb_protocol_ops snd_usbmidi_emagic_ops = {
 884         .input = snd_usbmidi_emagic_input,
 885         .output = snd_usbmidi_emagic_output,
 886         .init_out_endpoint = snd_usbmidi_emagic_init_out,
 887         .finish_out_endpoint = snd_usbmidi_emagic_finish_out,
 888 };
 889
 890
 891 static void update_roland_altsetting(struct snd_usb_midi* umidi)
 892 {
 893         struct usb_interface *intf;
 894         struct usb_host_interface *hostif;
 895         struct usb_interface_descriptor *intfd;
 896         int is_light_load;
 897
 898         intf = umidi->iface;
 899         is_light_load = intf->cur_altsetting != intf->altsetting;
 900         if (umidi->roland_load_ctl->private_value == is_light_load)
 901                 return;
 902         hostif = &intf->altsetting[umidi->roland_load_ctl->private_value];
 903         intfd = get_iface_desc(hostif);
 904         snd_usbmidi_input_stop(&umidi->list);
 905         usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
 906                           intfd->bAlternateSetting);
 907         snd_usbmidi_input_start(&umidi->list);
 908 }
 909
 910 static void substream_open(struct snd_rawmidi_substream *substream, int open)
 911 {
 912         struct snd_usb_midi* umidi = substream->rmidi->private_data;
 913         struct snd_kcontrol *ctl;
 914
 915         mutex_lock(&umidi->mutex);
 916         if (open) {
 917                 if (umidi->opened++ == 0 && umidi->roland_load_ctl) {
 918                         ctl = umidi->roland_load_ctl;
 919                         ctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
 920                         snd_ctl_notify(umidi->card,
 921                                        SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
 922                         update_roland_altsetting(umidi);
 923                 }
 924         } else {
 925                 if (--umidi->opened == 0 && umidi->roland_load_ctl) {
 926                         ctl = umidi->roland_load_ctl;
 927                         ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
 928                         snd_ctl_notify(umidi->card,
 929                                        SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
 930                 }
 931         }
 932         mutex_unlock(&umidi->mutex);
 933 }
 934
 935 static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream)
 936 {
 937         struct snd_usb_midi* umidi = substream->rmidi->private_data;
 938         struct usbmidi_out_port* port = NULL;
 939         int i, j;
 940
 941         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
 942                 if (umidi->endpoints[i].out)
 943                         for (j = 0; j < 0x10; ++j)
 944                                 if (umidi->endpoints[i].out->ports[j].substream == substream) {
 945                                         port = &umidi->endpoints[i].out->ports[j];
 946                                         break;
 947                                 }
 948         if (!port) {
 949                 snd_BUG();
 950                 return -ENXIO;
 951         }
 952         substream->runtime->private_data = port;
 953         port->state = STATE_UNKNOWN;
 954         substream_open(substream, 1);
 955         return 0;
 956 }
 957
 958 static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream)
 959 {
 960         substream_open(substream, 0);
 961         return 0;
 962 }
 963
 964 static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream, int up)
 965 {
 966         struct usbmidi_out_port* port = (struct usbmidi_out_port*)substream->runtime->private_data;
 967
 968         port->active = up;
 969         if (up) {
 970                 if (port->ep->umidi->disconnected) {
 971                         /* gobble up remaining bytes to prevent wait in
 972                          * snd_rawmidi_drain_output */
 973                         while (!snd_rawmidi_transmit_empty(substream))
 974                                 snd_rawmidi_transmit_ack(substream, 1);
 975                         return;
 976                 }
 977                 tasklet_schedule(&port->ep->tasklet);
 978         }
 979 }
 980
 981 static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream)
 982 {
 983         struct usbmidi_out_port* port = substream->runtime->private_data;
 984         struct snd_usb_midi_out_endpoint *ep = port->ep;
 985         unsigned int drain_urbs;
 986         DEFINE_WAIT(wait);
 987         long timeout = msecs_to_jiffies(50);
 988
 989         if (ep->umidi->disconnected)
 990                 return;
 991         /*
 992          * The substream buffer is empty, but some data might still be in the
 993          * currently active URBs, so we have to wait for those to complete.
 994          */
 995         spin_lock_irq(&ep->buffer_lock);
 996         drain_urbs = ep->active_urbs;
 997         if (drain_urbs) {
 998                 ep->drain_urbs |= drain_urbs;
 999                 do {
1000                         prepare_to_wait(&ep->drain_wait, &wait,
1001                                         TASK_UNINTERRUPTIBLE);
1002                         spin_unlock_irq(&ep->buffer_lock);
1003                         timeout = schedule_timeout(timeout);
1004                         spin_lock_irq(&ep->buffer_lock);
1005                         drain_urbs &= ep->drain_urbs;
1006                 } while (drain_urbs && timeout);
1007                 finish_wait(&ep->drain_wait, &wait);
1008         }
1009         spin_unlock_irq(&ep->buffer_lock);
1010 }
1011
1012 static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream)
1013 {
1014         substream_open(substream, 1);
1015         return 0;
1016 }
1017
1018 static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream)
1019 {
1020         substream_open(substream, 0);
1021         return 0;
1022 }
1023
1024 static void snd_usbmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
1025 {
1026         struct snd_usb_midi* umidi = substream->rmidi->private_data;
1027
1028         if (up)
1029                 set_bit(substream->number, &umidi->input_triggered);
1030         else
1031                 clear_bit(substream->number, &umidi->input_triggered);
1032 }
1033
1034 static struct snd_rawmidi_ops snd_usbmidi_output_ops = {
1035         .open = snd_usbmidi_output_open,
1036         .close = snd_usbmidi_output_close,
1037         .trigger = snd_usbmidi_output_trigger,
1038         .drain = snd_usbmidi_output_drain,
1039 };
1040
1041 static struct snd_rawmidi_ops snd_usbmidi_input_ops = {
1042         .open = snd_usbmidi_input_open,
1043         .close = snd_usbmidi_input_close,
1044         .trigger = snd_usbmidi_input_trigger
1045 };
1046
1047 static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb,
1048                                 unsigned int buffer_length)
1049 {
1050         usb_buffer_free(umidi->dev, buffer_length,
1051                         urb->transfer_buffer, urb->transfer_dma);
1052         usb_free_urb(urb);
1053 }
1054
1055 /*
1056  * Frees an input endpoint.
1057  * May be called when ep hasn't been initialized completely.
1058  */
1059 static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint* ep)
1060 {
1061         unsigned int i;
1062
1063         for (i = 0; i < INPUT_URBS; ++i)
1064                 if (ep->urbs[i])
1065                         free_urb_and_buffer(ep->umidi, ep->urbs[i],
1066                                             ep->urbs[i]->transfer_buffer_length);
1067         kfree(ep);
1068 }
1069
1070 /*
1071  * Creates an input endpoint.
1072  */
1073 static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi* umidi,
1074                                           struct snd_usb_midi_endpoint_info* ep_info,
1075                                           struct snd_usb_midi_endpoint* rep)
1076 {
1077         struct snd_usb_midi_in_endpoint* ep;
1078         void* buffer;
1079         unsigned int pipe;
1080         int length;
1081         unsigned int i;
1082
1083         rep->in = NULL;
1084         ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1085         if (!ep)
1086                 return -ENOMEM;
1087         ep->umidi = umidi;
1088
1089         for (i = 0; i < INPUT_URBS; ++i) {
1090                 ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
1091                 if (!ep->urbs[i]) {
1092                         snd_usbmidi_in_endpoint_delete(ep);
1093                         return -ENOMEM;
1094                 }
1095         }
1096         if (ep_info->in_interval)
1097                 pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep);
1098         else
1099                 pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep);
1100         length = usb_maxpacket(umidi->dev, pipe, 0);
1101         for (i = 0; i < INPUT_URBS; ++i) {
1102                 buffer = usb_buffer_alloc(umidi->dev, length, GFP_KERNEL,
1103                                           &ep->urbs[i]->transfer_dma);
1104                 if (!buffer) {
1105                         snd_usbmidi_in_endpoint_delete(ep);
1106                         return -ENOMEM;
1107                 }
1108                 if (ep_info->in_interval)
1109                         usb_fill_int_urb(ep->urbs[i], umidi->dev,
1110                                          pipe, buffer, length,
1111                                          snd_usbmidi_in_urb_complete,
1112                                          ep, ep_info->in_interval);
1113                 else
1114                         usb_fill_bulk_urb(ep->urbs[i], umidi->dev,
1115                                           pipe, buffer, length,
1116                                           snd_usbmidi_in_urb_complete, ep);
1117                 ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1118         }
1119
1120         rep->in = ep;
1121         return 0;
1122 }
1123
1124 /*
1125  * Frees an output endpoint.
1126  * May be called when ep hasn't been initialized completely.
1127  */
1128 static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep)
1129 {
1130         unsigned int i;
1131
1132         for (i = 0; i < OUTPUT_URBS; ++i)
1133                 if (ep->urbs[i].urb) {
1134                         free_urb_and_buffer(ep->umidi, ep->urbs[i].urb,
1135                                             ep->max_transfer);
1136                         ep->urbs[i].urb = NULL;
1137                 }
1138 }
1139
1140 static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep)
1141 {
1142         snd_usbmidi_out_endpoint_clear(ep);
1143         kfree(ep);
1144 }
1145
1146 /*
1147  * Creates an output endpoint, and initializes output ports.
1148  */
1149 static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi* umidi,
1150                                            struct snd_usb_midi_endpoint_info* ep_info,
1151                                            struct snd_usb_midi_endpoint* rep)
1152 {
1153         struct snd_usb_midi_out_endpoint* ep;
1154         unsigned int i;
1155         unsigned int pipe;
1156         void* buffer;
1157
1158         rep->out = NULL;
1159         ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1160         if (!ep)
1161                 return -ENOMEM;
1162         ep->umidi = umidi;
1163
1164         for (i = 0; i < OUTPUT_URBS; ++i) {
1165                 ep->urbs[i].urb = usb_alloc_urb(0, GFP_KERNEL);
1166                 if (!ep->urbs[i].urb) {
1167                         snd_usbmidi_out_endpoint_delete(ep);
1168                         return -ENOMEM;
1169                 }
1170                 ep->urbs[i].ep = ep;
1171         }
1172         if (ep_info->out_interval)
1173                 pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep);
1174         else
1175                 pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep);
1176         switch (umidi->usb_id) {
1177         default:
1178                 ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1);
1179                 break;
1180                 /*
1181                  * Various chips declare a packet size larger than 4 bytes, but
1182                  * do not actually work with larger packets:
1183                  */
1184         case USB_ID(0x0a92, 0x1020): /* ESI M4U */
1185         case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */
1186         case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */
1187         case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */
1188         case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */
1189                 ep->max_transfer = 4;
1190                 break;
1191         }
1192         for (i = 0; i < OUTPUT_URBS; ++i) {
1193                 buffer = usb_buffer_alloc(umidi->dev,
1194                                           ep->max_transfer, GFP_KERNEL,
1195                                           &ep->urbs[i].urb->transfer_dma);
1196                 if (!buffer) {
1197                         snd_usbmidi_out_endpoint_delete(ep);
1198                         return -ENOMEM;
1199                 }
1200                 if (ep_info->out_interval)
1201                         usb_fill_int_urb(ep->urbs[i].urb, umidi->dev,
1202                                          pipe, buffer, ep->max_transfer,
1203                                          snd_usbmidi_out_urb_complete,
1204                                          &ep->urbs[i], ep_info->out_interval);
1205                 else
1206                         usb_fill_bulk_urb(ep->urbs[i].urb, umidi->dev,
1207                                           pipe, buffer, ep->max_transfer,
1208                                           snd_usbmidi_out_urb_complete,
1209                                           &ep->urbs[i]);
1210                 ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1211         }
1212
1213         spin_lock_init(&ep->buffer_lock);
1214         tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep);
1215         init_waitqueue_head(&ep->drain_wait);
1216
1217         for (i = 0; i < 0x10; ++i)
1218                 if (ep_info->out_cables & (1 << i)) {
1219                         ep->ports[i].ep = ep;
1220                         ep->ports[i].cable = i << 4;
1221                 }
1222
1223         if (umidi->usb_protocol_ops->init_out_endpoint)
1224                 umidi->usb_protocol_ops->init_out_endpoint(ep);
1225
1226         rep->out = ep;
1227         return 0;
1228 }
1229
1230 /*
1231  * Frees everything.
1232  */
1233 static void snd_usbmidi_free(struct snd_usb_midi* umidi)
1234 {
1235         int i;
1236
1237         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1238                 struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
1239                 if (ep->out)
1240                         snd_usbmidi_out_endpoint_delete(ep->out);
1241                 if (ep->in)
1242                         snd_usbmidi_in_endpoint_delete(ep->in);
1243         }
1244         mutex_destroy(&umidi->mutex);
1245         kfree(umidi);
1246 }
1247
1248 /*
1249  * Unlinks all URBs (must be done before the usb_device is deleted).
1250  */
1251 void snd_usbmidi_disconnect(struct list_head* p)
1252 {
1253         struct snd_usb_midi* umidi;
1254         unsigned int i, j;
1255
1256         umidi = list_entry(p, struct snd_usb_midi, list);
1257         /*
1258          * an URB's completion handler may start the timer and
1259          * a timer may submit an URB. To reliably break the cycle
1260          * a flag under lock must be used
1261          */
1262         spin_lock_irq(&umidi->disc_lock);
1263         umidi->disconnected = 1;
1264         spin_unlock_irq(&umidi->disc_lock);
1265         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1266                 struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
1267                 if (ep->out)
1268                         tasklet_kill(&ep->out->tasklet);
1269                 if (ep->out) {
1270                         for (j = 0; j < OUTPUT_URBS; ++j)
1271                                 usb_kill_urb(ep->out->urbs[j].urb);
1272                         if (umidi->usb_protocol_ops->finish_out_endpoint)
1273                                 umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
1274                         ep->out->active_urbs = 0;
1275                         if (ep->out->drain_urbs) {
1276                                 ep->out->drain_urbs = 0;
1277                                 wake_up(&ep->out->drain_wait);
1278                         }
1279                 }
1280                 if (ep->in)
1281                         for (j = 0; j < INPUT_URBS; ++j)
1282                                 usb_kill_urb(ep->in->urbs[j]);
1283                 /* free endpoints here; later call can result in Oops */
1284                 if (ep->out)
1285                         snd_usbmidi_out_endpoint_clear(ep->out);
1286                 if (ep->in) {
1287                         snd_usbmidi_in_endpoint_delete(ep->in);
1288                         ep->in = NULL;
1289                 }
1290         }
1291         del_timer_sync(&umidi->error_timer);
1292 }
1293
1294 static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi)
1295 {
1296         struct snd_usb_midi* umidi = rmidi->private_data;
1297         snd_usbmidi_free(umidi);
1298 }
1299
1300 static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi* umidi,
1301                                                            int stream, int number)
1302 {
1303         struct list_head* list;
1304
1305         list_for_each(list, &umidi->rmidi->streams[stream].substreams) {
1306                 struct snd_rawmidi_substream *substream = list_entry(list, struct snd_rawmidi_substream, list);
1307                 if (substream->number == number)
1308                         return substream;
1309         }
1310         return NULL;
1311 }
1312
1313 /*
1314  * This list specifies names for ports that do not fit into the standard
1315  * "(product) MIDI (n)" schema because they aren't external MIDI ports,
1316  * such as internal control or synthesizer ports.
1317  */
1318 static struct port_info {
1319         u32 id;
1320         short int port;
1321         short int voices;
1322         const char *name;
1323         unsigned int seq_flags;
1324 } snd_usbmidi_port_info[] = {
1325 #define PORT_INFO(vendor, product, num, name_, voices_, flags) \
1326         { .id = USB_ID(vendor, product), \
1327           .port = num, .voices = voices_, \
1328           .name = name_, .seq_flags = flags }
1329 #define EXTERNAL_PORT(vendor, product, num, name) \
1330         PORT_INFO(vendor, product, num, name, 0, \
1331                   SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1332                   SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1333                   SNDRV_SEQ_PORT_TYPE_PORT)
1334 #define CONTROL_PORT(vendor, product, num, name) \
1335         PORT_INFO(vendor, product, num, name, 0, \
1336                   SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1337                   SNDRV_SEQ_PORT_TYPE_HARDWARE)
1338 #define ROLAND_SYNTH_PORT(vendor, product, num, name, voices) \
1339         PORT_INFO(vendor, product, num, name, voices, \
1340                   SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1341                   SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1342                   SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1343                   SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1344                   SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1345                   SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1346                   SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1347 #define SOUNDCANVAS_PORT(vendor, product, num, name, voices) \
1348         PORT_INFO(vendor, product, num, name, voices, \
1349                   SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1350                   SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1351                   SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1352                   SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1353                   SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1354                   SNDRV_SEQ_PORT_TYPE_MIDI_MT32 | \
1355                   SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1356                   SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1357         /* Roland UA-100 */
1358         CONTROL_PORT(0x0582, 0x0000, 2, "%s Control"),
1359         /* Roland SC-8850 */
1360         SOUNDCANVAS_PORT(0x0582, 0x0003, 0, "%s Part A", 128),
1361         SOUNDCANVAS_PORT(0x0582, 0x0003, 1, "%s Part B", 128),
1362         SOUNDCANVAS_PORT(0x0582, 0x0003, 2, "%s Part C", 128),
1363         SOUNDCANVAS_PORT(0x0582, 0x0003, 3, "%s Part D", 128),
1364         EXTERNAL_PORT(0x0582, 0x0003, 4, "%s MIDI 1"),
1365         EXTERNAL_PORT(0x0582, 0x0003, 5, "%s MIDI 2"),
1366         /* Roland U-8 */
1367         EXTERNAL_PORT(0x0582, 0x0004, 0, "%s MIDI"),
1368         CONTROL_PORT(0x0582, 0x0004, 1, "%s Control"),
1369         /* Roland SC-8820 */
1370         SOUNDCANVAS_PORT(0x0582, 0x0007, 0, "%s Part A", 64),
1371         SOUNDCANVAS_PORT(0x0582, 0x0007, 1, "%s Part B", 64),
1372         EXTERNAL_PORT(0x0582, 0x0007, 2, "%s MIDI"),
1373         /* Roland SK-500 */
1374         SOUNDCANVAS_PORT(0x0582, 0x000b, 0, "%s Part A", 64),
1375         SOUNDCANVAS_PORT(0x0582, 0x000b, 1, "%s Part B", 64),
1376         EXTERNAL_PORT(0x0582, 0x000b, 2, "%s MIDI"),
1377         /* Roland SC-D70 */
1378         SOUNDCANVAS_PORT(0x0582, 0x000c, 0, "%s Part A", 64),
1379         SOUNDCANVAS_PORT(0x0582, 0x000c, 1, "%s Part B", 64),
1380         EXTERNAL_PORT(0x0582, 0x000c, 2, "%s MIDI"),
1381         /* Edirol UM-880 */
1382         CONTROL_PORT(0x0582, 0x0014, 8, "%s Control"),
1383         /* Edirol SD-90 */
1384         ROLAND_SYNTH_PORT(0x0582, 0x0016, 0, "%s Part A", 128),
1385         ROLAND_SYNTH_PORT(0x0582, 0x0016, 1, "%s Part B", 128),
1386         EXTERNAL_PORT(0x0582, 0x0016, 2, "%s MIDI 1"),
1387         EXTERNAL_PORT(0x0582, 0x0016, 3, "%s MIDI 2"),
1388         /* Edirol UM-550 */
1389         CONTROL_PORT(0x0582, 0x0023, 5, "%s Control"),
1390         /* Edirol SD-20 */
1391         ROLAND_SYNTH_PORT(0x0582, 0x0027, 0, "%s Part A", 64),
1392         ROLAND_SYNTH_PORT(0x0582, 0x0027, 1, "%s Part B", 64),
1393         EXTERNAL_PORT(0x0582, 0x0027, 2, "%s MIDI"),
1394         /* Edirol SD-80 */
1395         ROLAND_SYNTH_PORT(0x0582, 0x0029, 0, "%s Part A", 128),
1396         ROLAND_SYNTH_PORT(0x0582, 0x0029, 1, "%s Part B", 128),
1397         EXTERNAL_PORT(0x0582, 0x0029, 2, "%s MIDI 1"),
1398         EXTERNAL_PORT(0x0582, 0x0029, 3, "%s MIDI 2"),
1399         /* Edirol UA-700 */
1400         EXTERNAL_PORT(0x0582, 0x002b, 0, "%s MIDI"),
1401         CONTROL_PORT(0x0582, 0x002b, 1, "%s Control"),
1402         /* Roland VariOS */
1403         EXTERNAL_PORT(0x0582, 0x002f, 0, "%s MIDI"),
1404         EXTERNAL_PORT(0x0582, 0x002f, 1, "%s External MIDI"),
1405         EXTERNAL_PORT(0x0582, 0x002f, 2, "%s Sync"),
1406         /* Edirol PCR */
1407         EXTERNAL_PORT(0x0582, 0x0033, 0, "%s MIDI"),
1408         EXTERNAL_PORT(0x0582, 0x0033, 1, "%s 1"),
1409         EXTERNAL_PORT(0x0582, 0x0033, 2, "%s 2"),
1410         /* BOSS GS-10 */
1411         EXTERNAL_PORT(0x0582, 0x003b, 0, "%s MIDI"),
1412         CONTROL_PORT(0x0582, 0x003b, 1, "%s Control"),
1413         /* Edirol UA-1000 */
1414         EXTERNAL_PORT(0x0582, 0x0044, 0, "%s MIDI"),
1415         CONTROL_PORT(0x0582, 0x0044, 1, "%s Control"),
1416         /* Edirol UR-80 */
1417         EXTERNAL_PORT(0x0582, 0x0048, 0, "%s MIDI"),
1418         EXTERNAL_PORT(0x0582, 0x0048, 1, "%s 1"),
1419         EXTERNAL_PORT(0x0582, 0x0048, 2, "%s 2"),
1420         /* Edirol PCR-A */
1421         EXTERNAL_PORT(0x0582, 0x004d, 0, "%s MIDI"),
1422         EXTERNAL_PORT(0x0582, 0x004d, 1, "%s 1"),
1423         EXTERNAL_PORT(0x0582, 0x004d, 2, "%s 2"),
1424         /* Edirol UM-3EX */
1425         CONTROL_PORT(0x0582, 0x009a, 3, "%s Control"),
1426         /* M-Audio MidiSport 8x8 */
1427         CONTROL_PORT(0x0763, 0x1031, 8, "%s Control"),
1428         CONTROL_PORT(0x0763, 0x1033, 8, "%s Control"),
1429         /* MOTU Fastlane */
1430         EXTERNAL_PORT(0x07fd, 0x0001, 0, "%s MIDI A"),
1431         EXTERNAL_PORT(0x07fd, 0x0001, 1, "%s MIDI B"),
1432         /* Emagic Unitor8/AMT8/MT4 */
1433         EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"),
1434         EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"),
1435         EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"),
1436         /* Access Music Virus TI */
1437         EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"),
1438         PORT_INFO(0x133e, 0x0815, 1, "%s Synth", 0,
1439                 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1440                 SNDRV_SEQ_PORT_TYPE_HARDWARE |
1441                 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER),
1442 };
1443
1444 static struct port_info *find_port_info(struct snd_usb_midi* umidi, int number)
1445 {
1446         int i;
1447
1448         for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) {
1449                 if (snd_usbmidi_port_info[i].id == umidi->usb_id &&
1450                     snd_usbmidi_port_info[i].port == number)
1451                         return &snd_usbmidi_port_info[i];
1452         }
1453         return NULL;
1454 }
1455
1456 static void snd_usbmidi_get_port_info(struct snd_rawmidi *rmidi, int number,
1457                                       struct snd_seq_port_info *seq_port_info)
1458 {
1459         struct snd_usb_midi *umidi = rmidi->private_data;
1460         struct port_info *port_info;
1461
1462         /* TODO: read port flags from descriptors */
1463         port_info = find_port_info(umidi, number);
1464         if (port_info) {
1465                 seq_port_info->type = port_info->seq_flags;
1466                 seq_port_info->midi_voices = port_info->voices;
1467         }
1468 }
1469
1470 static void snd_usbmidi_init_substream(struct snd_usb_midi* umidi,
1471                                        int stream, int number,
1472                                        struct snd_rawmidi_substream ** rsubstream)
1473 {
1474         struct port_info *port_info;
1475         const char *name_format;
1476
1477         struct snd_rawmidi_substream *substream = snd_usbmidi_find_substream(umidi, stream, number);
1478         if (!substream) {
1479                 snd_printd(KERN_ERR "substream %d:%d not found\n", stream, number);
1480                 return;
1481         }
1482
1483         /* TODO: read port name from jack descriptor */
1484         port_info = find_port_info(umidi, number);
1485         name_format = port_info ? port_info->name : "%s MIDI %d";
1486         snprintf(substream->name, sizeof(substream->name),
1487                  name_format, umidi->card->shortname, number + 1);
1488
1489         *rsubstream = substream;
1490 }
1491
1492 /*
1493  * Creates the endpoints and their ports.
1494  */
1495 static int snd_usbmidi_create_endpoints(struct snd_usb_midi* umidi,
1496                                         struct snd_usb_midi_endpoint_info* endpoints)
1497 {
1498         int i, j, err;
1499         int out_ports = 0, in_ports = 0;
1500
1501         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1502                 if (endpoints[i].out_cables) {
1503                         err = snd_usbmidi_out_endpoint_create(umidi, &endpoints[i],
1504                                                               &umidi->endpoints[i]);
1505                         if (err < 0)
1506                                 return err;
1507                 }
1508                 if (endpoints[i].in_cables) {
1509                         err = snd_usbmidi_in_endpoint_create(umidi, &endpoints[i],
1510                                                              &umidi->endpoints[i]);
1511                         if (err < 0)
1512                                 return err;
1513                 }
1514
1515                 for (j = 0; j < 0x10; ++j) {
1516                         if (endpoints[i].out_cables & (1 << j)) {
1517                                 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, out_ports,
1518                                                            &umidi->endpoints[i].out->ports[j].substream);
1519                                 ++out_ports;
1520                         }
1521                         if (endpoints[i].in_cables & (1 << j)) {
1522                                 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, in_ports,
1523                                                            &umidi->endpoints[i].in->ports[j].substream);
1524                                 ++in_ports;
1525                         }
1526                 }
1527         }
1528         snd_printdd(KERN_INFO "created %d output and %d input ports\n",
1529                     out_ports, in_ports);
1530         return 0;
1531 }
1532
1533 /*
1534  * Returns MIDIStreaming device capabilities.
1535  */
1536 static int snd_usbmidi_get_ms_info(struct snd_usb_midi* umidi,
1537                                    struct snd_usb_midi_endpoint_info* endpoints)
1538 {
1539         struct usb_interface* intf;
1540         struct usb_host_interface *hostif;
1541         struct usb_interface_descriptor* intfd;
1542         struct usb_ms_header_descriptor* ms_header;
1543         struct usb_host_endpoint *hostep;
1544         struct usb_endpoint_descriptor* ep;
1545         struct usb_ms_endpoint_descriptor* ms_ep;
1546         int i, epidx;
1547
1548         intf = umidi->iface;
1549         if (!intf)
1550                 return -ENXIO;
1551         hostif = &intf->altsetting[0];
1552         intfd = get_iface_desc(hostif);
1553         ms_header = (struct usb_ms_header_descriptor*)hostif->extra;
1554         if (hostif->extralen >= 7 &&
1555             ms_header->bLength >= 7 &&
1556             ms_header->bDescriptorType == USB_DT_CS_INTERFACE &&
1557             ms_header->bDescriptorSubtype == UAC_HEADER)
1558                 snd_printdd(KERN_INFO "MIDIStreaming version %02x.%02x\n",
1559                             ms_header->bcdMSC[1], ms_header->bcdMSC[0]);
1560         else
1561                 snd_printk(KERN_WARNING "MIDIStreaming interface descriptor not found\n");
1562
1563         epidx = 0;
1564         for (i = 0; i < intfd->bNumEndpoints; ++i) {
1565                 hostep = &hostif->endpoint[i];
1566                 ep = get_ep_desc(hostep);
1567                 if (!usb_endpoint_xfer_bulk(ep) && !usb_endpoint_xfer_int(ep))
1568                         continue;
1569                 ms_ep = (struct usb_ms_endpoint_descriptor*)hostep->extra;
1570                 if (hostep->extralen < 4 ||
1571                     ms_ep->bLength < 4 ||
1572                     ms_ep->bDescriptorType != USB_DT_CS_ENDPOINT ||
1573                     ms_ep->bDescriptorSubtype != UAC_MS_GENERAL)
1574                         continue;
1575                 if (usb_endpoint_dir_out(ep)) {
1576                         if (endpoints[epidx].out_ep) {
1577                                 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1578                                         snd_printk(KERN_WARNING "too many endpoints\n");
1579                                         break;
1580                                 }
1581                         }
1582                         endpoints[epidx].out_ep = usb_endpoint_num(ep);
1583                         if (usb_endpoint_xfer_int(ep))
1584                                 endpoints[epidx].out_interval = ep->bInterval;
1585                         else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1586                                 /*
1587                                  * Low speed bulk transfers don't exist, so
1588                                  * force interrupt transfers for devices like
1589                                  * ESI MIDI Mate that try to use them anyway.
1590                                  */
1591                                 endpoints[epidx].out_interval = 1;
1592                         endpoints[epidx].out_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
1593                         snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n",
1594                                     ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1595                 } else {
1596                         if (endpoints[epidx].in_ep) {
1597                                 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1598                                         snd_printk(KERN_WARNING "too many endpoints\n");
1599                                         break;
1600                                 }
1601                         }
1602                         endpoints[epidx].in_ep = usb_endpoint_num(ep);
1603                         if (usb_endpoint_xfer_int(ep))
1604                                 endpoints[epidx].in_interval = ep->bInterval;
1605                         else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1606                                 endpoints[epidx].in_interval = 1;
1607                         endpoints[epidx].in_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
1608                         snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n",
1609                                     ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1610                 }
1611         }
1612         return 0;
1613 }
1614
1615 static int roland_load_info(struct snd_kcontrol *kcontrol,
1616                             struct snd_ctl_elem_info *info)
1617 {
1618         static const char *const names[] = { "High Load", "Light Load" };
1619
1620         info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1621         info->count = 1;
1622         info->value.enumerated.items = 2;
1623         if (info->value.enumerated.item > 1)
1624                 info->value.enumerated.item = 1;
1625         strcpy(info->value.enumerated.name, names[info->value.enumerated.item]);
1626         return 0;
1627 }
1628
1629 static int roland_load_get(struct snd_kcontrol *kcontrol,
1630                            struct snd_ctl_elem_value *value)
1631 {
1632         value->value.enumerated.item[0] = kcontrol->private_value;
1633         return 0;
1634 }
1635
1636 static int roland_load_put(struct snd_kcontrol *kcontrol,
1637                            struct snd_ctl_elem_value *value)
1638 {
1639         struct snd_usb_midi* umidi = kcontrol->private_data;
1640         int changed;
1641
1642         if (value->value.enumerated.item[0] > 1)
1643                 return -EINVAL;
1644         mutex_lock(&umidi->mutex);
1645         changed = value->value.enumerated.item[0] != kcontrol->private_value;
1646         if (changed)
1647                 kcontrol->private_value = value->value.enumerated.item[0];
1648         mutex_unlock(&umidi->mutex);
1649         return changed;
1650 }
1651
1652 static struct snd_kcontrol_new roland_load_ctl = {
1653         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1654         .name = "MIDI Input Mode",
1655         .info = roland_load_info,
1656         .get = roland_load_get,
1657         .put = roland_load_put,
1658         .private_value = 1,
1659 };
1660
1661 /*
1662  * On Roland devices, use the second alternate setting to be able to use
1663  * the interrupt input endpoint.
1664  */
1665 static void snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi* umidi)
1666 {
1667         struct usb_interface* intf;
1668         struct usb_host_interface *hostif;
1669         struct usb_interface_descriptor* intfd;
1670
1671         intf = umidi->iface;
1672         if (!intf || intf->num_altsetting != 2)
1673                 return;
1674
1675         hostif = &intf->altsetting[1];
1676         intfd = get_iface_desc(hostif);
1677         if (intfd->bNumEndpoints != 2 ||
1678             (get_endpoint(hostif, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK ||
1679             (get_endpoint(hostif, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
1680                 return;
1681
1682         snd_printdd(KERN_INFO "switching to altsetting %d with int ep\n",
1683                     intfd->bAlternateSetting);
1684         usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
1685                           intfd->bAlternateSetting);
1686
1687         umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi);
1688         if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0)
1689                 umidi->roland_load_ctl = NULL;
1690 }
1691
1692 /*
1693  * Try to find any usable endpoints in the interface.
1694  */
1695 static int snd_usbmidi_detect_endpoints(struct snd_usb_midi* umidi,
1696                                         struct snd_usb_midi_endpoint_info* endpoint,
1697                                         int max_endpoints)
1698 {
1699         struct usb_interface* intf;
1700         struct usb_host_interface *hostif;
1701         struct usb_interface_descriptor* intfd;
1702         struct usb_endpoint_descriptor* epd;
1703         int i, out_eps = 0, in_eps = 0;
1704
1705         if (USB_ID_VENDOR(umidi->usb_id) == 0x0582)
1706                 snd_usbmidi_switch_roland_altsetting(umidi);
1707
1708         if (endpoint[0].out_ep || endpoint[0].in_ep)
1709                 return 0;
1710
1711         intf = umidi->iface;
1712         if (!intf || intf->num_altsetting < 1)
1713                 return -ENOENT;
1714         hostif = intf->cur_altsetting;
1715         intfd = get_iface_desc(hostif);
1716
1717         for (i = 0; i < intfd->bNumEndpoints; ++i) {
1718                 epd = get_endpoint(hostif, i);
1719                 if (!usb_endpoint_xfer_bulk(epd) &&
1720                     !usb_endpoint_xfer_int(epd))
1721                         continue;
1722                 if (out_eps < max_endpoints &&
1723                     usb_endpoint_dir_out(epd)) {
1724                         endpoint[out_eps].out_ep = usb_endpoint_num(epd);
1725                         if (usb_endpoint_xfer_int(epd))
1726                                 endpoint[out_eps].out_interval = epd->bInterval;
1727                         ++out_eps;
1728                 }
1729                 if (in_eps < max_endpoints &&
1730                     usb_endpoint_dir_in(epd)) {
1731                         endpoint[in_eps].in_ep = usb_endpoint_num(epd);
1732                         if (usb_endpoint_xfer_int(epd))
1733                                 endpoint[in_eps].in_interval = epd->bInterval;
1734                         ++in_eps;
1735                 }
1736         }
1737         return (out_eps || in_eps) ? 0 : -ENOENT;
1738 }
1739
1740 /*
1741  * Detects the endpoints for one-port-per-endpoint protocols.
1742  */
1743 static int snd_usbmidi_detect_per_port_endpoints(struct snd_usb_midi* umidi,
1744                                                  struct snd_usb_midi_endpoint_info* endpoints)
1745 {
1746         int err, i;
1747
1748         err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS);
1749         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1750                 if (endpoints[i].out_ep)
1751                         endpoints[i].out_cables = 0x0001;
1752                 if (endpoints[i].in_ep)
1753                         endpoints[i].in_cables = 0x0001;
1754         }
1755         return err;
1756 }
1757
1758 /*
1759  * Detects the endpoints and ports of Yamaha devices.
1760  */
1761 static int snd_usbmidi_detect_yamaha(struct snd_usb_midi* umidi,
1762                                      struct snd_usb_midi_endpoint_info* endpoint)
1763 {
1764         struct usb_interface* intf;
1765         struct usb_host_interface *hostif;
1766         struct usb_interface_descriptor* intfd;
1767         uint8_t* cs_desc;
1768
1769         intf = umidi->iface;
1770         if (!intf)
1771                 return -ENOENT;
1772         hostif = intf->altsetting;
1773         intfd = get_iface_desc(hostif);
1774         if (intfd->bNumEndpoints < 1)
1775                 return -ENOENT;
1776
1777         /*
1778          * For each port there is one MIDI_IN/OUT_JACK descriptor, not
1779          * necessarily with any useful contents.  So simply count 'em.
1780          */
1781         for (cs_desc = hostif->extra;
1782              cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
1783              cs_desc += cs_desc[0]) {
1784                 if (cs_desc[1] == USB_DT_CS_INTERFACE) {
1785                         if (cs_desc[2] == UAC_MIDI_IN_JACK)
1786                                 endpoint->in_cables = (endpoint->in_cables << 1) | 1;
1787                         else if (cs_desc[2] == UAC_MIDI_OUT_JACK)
1788                                 endpoint->out_cables = (endpoint->out_cables << 1) | 1;
1789                 }
1790         }
1791         if (!endpoint->in_cables && !endpoint->out_cables)
1792                 return -ENOENT;
1793
1794         return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
1795 }
1796
1797 /*
1798  * Creates the endpoints and their ports for Midiman devices.
1799  */
1800 static int snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi* umidi,
1801                                                 struct snd_usb_midi_endpoint_info* endpoint)
1802 {
1803         struct snd_usb_midi_endpoint_info ep_info;
1804         struct usb_interface* intf;
1805         struct usb_host_interface *hostif;
1806         struct usb_interface_descriptor* intfd;
1807         struct usb_endpoint_descriptor* epd;
1808         int cable, err;
1809
1810         intf = umidi->iface;
1811         if (!intf)
1812                 return -ENOENT;
1813         hostif = intf->altsetting;
1814         intfd = get_iface_desc(hostif);
1815         /*
1816          * The various MidiSport devices have more or less random endpoint
1817          * numbers, so we have to identify the endpoints by their index in
1818          * the descriptor array, like the driver for that other OS does.
1819          *
1820          * There is one interrupt input endpoint for all input ports, one
1821          * bulk output endpoint for even-numbered ports, and one for odd-
1822          * numbered ports.  Both bulk output endpoints have corresponding
1823          * input bulk endpoints (at indices 1 and 3) which aren't used.
1824          */
1825         if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) {
1826                 snd_printdd(KERN_ERR "not enough endpoints\n");
1827                 return -ENOENT;
1828         }
1829
1830         epd = get_endpoint(hostif, 0);
1831         if (!usb_endpoint_dir_in(epd) || !usb_endpoint_xfer_int(epd)) {
1832                 snd_printdd(KERN_ERR "endpoint[0] isn't interrupt\n");
1833                 return -ENXIO;
1834         }
1835         epd = get_endpoint(hostif, 2);
1836         if (!usb_endpoint_dir_out(epd) || !usb_endpoint_xfer_bulk(epd)) {
1837                 snd_printdd(KERN_ERR "endpoint[2] isn't bulk output\n");
1838                 return -ENXIO;
1839         }
1840         if (endpoint->out_cables > 0x0001) {
1841                 epd = get_endpoint(hostif, 4);
1842                 if (!usb_endpoint_dir_out(epd) ||
1843                     !usb_endpoint_xfer_bulk(epd)) {
1844                         snd_printdd(KERN_ERR "endpoint[4] isn't bulk output\n");
1845                         return -ENXIO;
1846                 }
1847         }
1848
1849         ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1850         ep_info.out_interval = 0;
1851         ep_info.out_cables = endpoint->out_cables & 0x5555;
1852         err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
1853         if (err < 0)
1854                 return err;
1855
1856         ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1857         ep_info.in_interval = get_endpoint(hostif, 0)->bInterval;
1858         ep_info.in_cables = endpoint->in_cables;
1859         err = snd_usbmidi_in_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
1860         if (err < 0)
1861                 return err;
1862
1863         if (endpoint->out_cables > 0x0001) {
1864                 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1865                 ep_info.out_cables = endpoint->out_cables & 0xaaaa;
1866                 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[1]);
1867                 if (err < 0)
1868                         return err;
1869         }
1870
1871         for (cable = 0; cable < 0x10; ++cable) {
1872                 if (endpoint->out_cables & (1 << cable))
1873                         snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, cable,
1874                                                    &umidi->endpoints[cable & 1].out->ports[cable].substream);
1875                 if (endpoint->in_cables & (1 << cable))
1876                         snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, cable,
1877                                                    &umidi->endpoints[0].in->ports[cable].substream);
1878         }
1879         return 0;
1880 }
1881
1882 static struct snd_rawmidi_global_ops snd_usbmidi_ops = {
1883         .get_port_info = snd_usbmidi_get_port_info,
1884 };
1885
1886 static int snd_usbmidi_create_rawmidi(struct snd_usb_midi* umidi,
1887                                       int out_ports, int in_ports)
1888 {
1889         struct snd_rawmidi *rmidi;
1890         int err;
1891
1892         err = snd_rawmidi_new(umidi->card, "USB MIDI",
1893                               umidi->next_midi_device++,
1894                               out_ports, in_ports, &rmidi);
1895         if (err < 0)
1896                 return err;
1897         strcpy(rmidi->name, umidi->card->shortname);
1898         rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
1899                             SNDRV_RAWMIDI_INFO_INPUT |
1900                             SNDRV_RAWMIDI_INFO_DUPLEX;
1901         rmidi->ops = &snd_usbmidi_ops;
1902         rmidi->private_data = umidi;
1903         rmidi->private_free = snd_usbmidi_rawmidi_free;
1904         snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_usbmidi_output_ops);
1905         snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_usbmidi_input_ops);
1906
1907         umidi->rmidi = rmidi;
1908         return 0;
1909 }
1910
1911 /*
1912  * Temporarily stop input.
1913  */
1914 void snd_usbmidi_input_stop(struct list_head* p)
1915 {
1916         struct snd_usb_midi* umidi;
1917         unsigned int i, j;
1918
1919         umidi = list_entry(p, struct snd_usb_midi, list);
1920         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1921                 struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
1922                 if (ep->in)
1923                         for (j = 0; j < INPUT_URBS; ++j)
1924                                 usb_kill_urb(ep->in->urbs[j]);
1925         }
1926 }
1927
1928 static void snd_usbmidi_input_start_ep(struct snd_usb_midi_in_endpoint* ep)
1929 {
1930         unsigned int i;
1931
1932         if (!ep)
1933                 return;
1934         for (i = 0; i < INPUT_URBS; ++i) {
1935                 struct urb* urb = ep->urbs[i];
1936                 urb->dev = ep->umidi->dev;
1937                 snd_usbmidi_submit_urb(urb, GFP_KERNEL);
1938         }
1939 }
1940
1941 /*
1942  * Resume input after a call to snd_usbmidi_input_stop().
1943  */
1944 void snd_usbmidi_input_start(struct list_head* p)
1945 {
1946         struct snd_usb_midi* umidi;
1947         int i;
1948
1949         umidi = list_entry(p, struct snd_usb_midi, list);
1950         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
1951                 snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
1952 }
1953
1954 /*
1955  * Creates and registers everything needed for a MIDI streaming interface.
1956  */
1957 int snd_usbmidi_create(struct snd_card *card,
1958                        struct usb_interface* iface,
1959                        struct list_head *midi_list,
1960                        const struct snd_usb_audio_quirk* quirk)
1961 {
1962         struct snd_usb_midi* umidi;
1963         struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS];
1964         int out_ports, in_ports;
1965         int i, err;
1966
1967         umidi = kzalloc(sizeof(*umidi), GFP_KERNEL);
1968         if (!umidi)
1969                 return -ENOMEM;
1970         umidi->dev = interface_to_usbdev(iface);
1971         umidi->card = card;
1972         umidi->iface = iface;
1973         umidi->quirk = quirk;
1974         umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
1975         init_timer(&umidi->error_timer);
1976         spin_lock_init(&umidi->disc_lock);
1977         mutex_init(&umidi->mutex);
1978         umidi->usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor),
1979                                le16_to_cpu(umidi->dev->descriptor.idProduct));
1980         umidi->error_timer.function = snd_usbmidi_error_timer;
1981         umidi->error_timer.data = (unsigned long)umidi;
1982
1983         /* detect the endpoint(s) to use */
1984         memset(endpoints, 0, sizeof(endpoints));
1985         switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) {
1986         case QUIRK_MIDI_STANDARD_INTERFACE:
1987                 err = snd_usbmidi_get_ms_info(umidi, endpoints);
1988                 if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */
1989                         umidi->usb_protocol_ops =
1990                                 &snd_usbmidi_maudio_broken_running_status_ops;
1991                 break;
1992         case QUIRK_MIDI_US122L:
1993                 umidi->usb_protocol_ops = &snd_usbmidi_122l_ops;
1994                 /* fall through */
1995         case QUIRK_MIDI_FIXED_ENDPOINT:
1996                 memcpy(&endpoints[0], quirk->data,
1997                        sizeof(struct snd_usb_midi_endpoint_info));
1998                 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
1999                 break;
2000         case QUIRK_MIDI_YAMAHA:
2001                 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]);
2002                 break;
2003         case QUIRK_MIDI_MIDIMAN:
2004                 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
2005                 memcpy(&endpoints[0], quirk->data,
2006                        sizeof(struct snd_usb_midi_endpoint_info));
2007                 err = 0;
2008                 break;
2009         case QUIRK_MIDI_NOVATION:
2010                 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
2011                 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2012                 break;
2013         case QUIRK_MIDI_FASTLANE:
2014                 umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;
2015                 /*
2016                  * Interface 1 contains isochronous endpoints, but with the same
2017                  * numbers as in interface 0.  Since it is interface 1 that the
2018                  * USB core has most recently seen, these descriptors are now
2019                  * associated with the endpoint numbers.  This will foul up our
2020                  * attempts to submit bulk/interrupt URBs to the endpoints in
2021                  * interface 0, so we have to make sure that the USB core looks
2022                  * again at interface 0 by calling usb_set_interface() on it.
2023                  */
2024                 usb_set_interface(umidi->dev, 0, 0);
2025                 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2026                 break;
2027         case QUIRK_MIDI_EMAGIC:
2028                 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops;
2029                 memcpy(&endpoints[0], quirk->data,
2030                        sizeof(struct snd_usb_midi_endpoint_info));
2031                 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2032                 break;
2033         case QUIRK_MIDI_CME:
2034                 umidi->usb_protocol_ops = &snd_usbmidi_cme_ops;
2035                 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2036                 break;
2037         default:
2038                 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
2039                 err = -ENXIO;
2040                 break;
2041         }
2042         if (err < 0) {
2043                 kfree(umidi);
2044                 return err;
2045         }
2046
2047         /* create rawmidi device */
2048         out_ports = 0;
2049         in_ports = 0;
2050         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2051                 out_ports += hweight16(endpoints[i].out_cables);
2052                 in_ports += hweight16(endpoints[i].in_cables);
2053         }
2054         err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports);
2055         if (err < 0) {
2056                 kfree(umidi);
2057                 return err;
2058         }
2059
2060         /* create endpoint/port structures */
2061         if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN)
2062                 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]);
2063         else
2064                 err = snd_usbmidi_create_endpoints(umidi, endpoints);
2065         if (err < 0) {
2066                 snd_usbmidi_free(umidi);
2067                 return err;
2068         }
2069
2070         list_add_tail(&umidi->list, midi_list);
2071
2072         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
2073                 snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
2074         return 0;
2075 }
2076
2077 EXPORT_SYMBOL(snd_usbmidi_create);
2078 EXPORT_SYMBOL(snd_usbmidi_input_stop);
2079 EXPORT_SYMBOL(snd_usbmidi_input_start);
2080 EXPORT_SYMBOL(snd_usbmidi_disconnect);