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
  76MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
  77MODULE_DESCRIPTION("USB Audio/MIDI helper module");
  78MODULE_LICENSE("Dual BSD/GPL");
  79
  80
  81struct usb_ms_header_descriptor {
  82	__u8  bLength;
  83	__u8  bDescriptorType;
  84	__u8  bDescriptorSubtype;
  85	__u8  bcdMSC[2];
  86	__le16 wTotalLength;
  87} __attribute__ ((packed));
  88
  89struct usb_ms_endpoint_descriptor {
  90	__u8  bLength;
  91	__u8  bDescriptorType;
  92	__u8  bDescriptorSubtype;
  93	__u8  bNumEmbMIDIJack;
  94	__u8  baAssocJackID[0];
  95} __attribute__ ((packed));
  96
  97struct snd_usb_midi_in_endpoint;
  98struct snd_usb_midi_out_endpoint;
  99struct snd_usb_midi_endpoint;
 100
 101struct 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
 109struct 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
 136struct 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
 169struct 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
 181static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint* ep);
 182
 183static 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 */
 190static 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 */
 201static 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 */
 224static void snd_usbmidi_input_data(struct snd_usb_midi_in_endpoint* ep, int portidx,
 225				   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
 239static 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 */
 253static 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
 277static 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 */
 307static 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
 344static void snd_usbmidi_out_tasklet(unsigned long data)
 345{
 346	struct snd_usb_midi_out_endpoint* ep = (struct snd_usb_midi_out_endpoint *) data;
 347
 348	snd_usbmidi_do_output(ep);
 349}
 350
 351/* called after transfers had been interrupted due to some USB error */
 352static void snd_usbmidi_error_timer(unsigned long data)
 353{
 354	struct snd_usb_midi *umidi = (struct snd_usb_midi *)data;
 355	unsigned int i, j;
 356
 357	spin_lock(&umidi->disc_lock);
 358	if (umidi->disconnected) {
 359		spin_unlock(&umidi->disc_lock);
 360		return;
 361	}
 362	for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
 363		struct snd_usb_midi_in_endpoint *in = umidi->endpoints[i].in;
 364		if (in && in->error_resubmit) {
 365			in->error_resubmit = 0;
 366			for (j = 0; j < INPUT_URBS; ++j) {
 367				in->urbs[j]->dev = umidi->dev;
 368				snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC);
 369			}
 370		}
 371		if (umidi->endpoints[i].out)
 372			snd_usbmidi_do_output(umidi->endpoints[i].out);
 373	}
 374	spin_unlock(&umidi->disc_lock);
 375}
 376
 377/* helper function to send static data that may not DMA-able */
 378static int send_bulk_static_data(struct snd_usb_midi_out_endpoint* ep,
 379				 const void *data, int len)
 380{
 381	int err = 0;
 382	void *buf = kmemdup(data, len, GFP_KERNEL);
 383	if (!buf)
 384		return -ENOMEM;
 385	dump_urb("sending", buf, len);
 386	if (ep->urbs[0].urb)
 387		err = usb_bulk_msg(ep->umidi->dev, ep->urbs[0].urb->pipe,
 388				   buf, len, NULL, 250);
 389	kfree(buf);
 390	return err;
 391}
 392
 393/*
 394 * Standard USB MIDI protocol: see the spec.
 395 * Midiman protocol: like the standard protocol, but the control byte is the
 396 * fourth byte in each packet, and uses length instead of CIN.
 397 */
 398
 399static void snd_usbmidi_standard_input(struct snd_usb_midi_in_endpoint* ep,
 400				       uint8_t* buffer, int buffer_length)
 401{
 402	int i;
 403
 404	for (i = 0; i + 3 < buffer_length; i += 4)
 405		if (buffer[i] != 0) {
 406			int cable = buffer[i] >> 4;
 407			int length = snd_usbmidi_cin_length[buffer[i] & 0x0f];
 408			snd_usbmidi_input_data(ep, cable, &buffer[i + 1], length);
 409		}
 410}
 411
 412static void snd_usbmidi_midiman_input(struct snd_usb_midi_in_endpoint* ep,
 413				      uint8_t* buffer, int buffer_length)
 414{
 415	int i;
 416
 417	for (i = 0; i + 3 < buffer_length; i += 4)
 418		if (buffer[i + 3] != 0) {
 419			int port = buffer[i + 3] >> 4;
 420			int length = buffer[i + 3] & 3;
 421			snd_usbmidi_input_data(ep, port, &buffer[i], length);
 422		}
 423}
 424
 425/*
 426 * Buggy M-Audio device: running status on input results in a packet that has
 427 * the data bytes but not the status byte and that is marked with CIN 4.
 428 */
 429static void snd_usbmidi_maudio_broken_running_status_input(
 430					struct snd_usb_midi_in_endpoint* ep,
 431					uint8_t* buffer, int buffer_length)
 432{
 433	int i;
 434
 435	for (i = 0; i + 3 < buffer_length; i += 4)
 436		if (buffer[i] != 0) {
 437			int cable = buffer[i] >> 4;
 438			u8 cin = buffer[i] & 0x0f;
 439			struct usbmidi_in_port *port = &ep->ports[cable];
 440			int length;
 441
 442			length = snd_usbmidi_cin_length[cin];
 443			if (cin == 0xf && buffer[i + 1] >= 0xf8)
 444				; /* realtime msg: no running status change */
 445			else if (cin >= 0x8 && cin <= 0xe)
 446				/* channel msg */
 447				port->running_status_length = length - 1;
 448			else if (cin == 0x4 &&
 449				 port->running_status_length != 0 &&
 450				 buffer[i + 1] < 0x80)
 451				/* CIN 4 that is not a SysEx */
 452				length = port->running_status_length;
 453			else
 454				/*
 455				 * All other msgs cannot begin running status.
 456				 * (A channel msg sent as two or three CIN 0xF
 457				 * packets could in theory, but this device
 458				 * doesn't use this format.)
 459				 */
 460				port->running_status_length = 0;
 461			snd_usbmidi_input_data(ep, cable, &buffer[i + 1], length);
 462		}
 463}
 464
 465/*
 466 * CME protocol: like the standard protocol, but SysEx commands are sent as a
 467 * single USB packet preceded by a 0x0F byte.
 468 */
 469static void snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint *ep,
 470				  uint8_t *buffer, int buffer_length)
 471{
 472	if (buffer_length < 2 || (buffer[0] & 0x0f) != 0x0f)
 473		snd_usbmidi_standard_input(ep, buffer, buffer_length);
 474	else
 475		snd_usbmidi_input_data(ep, buffer[0] >> 4,
 476				       &buffer[1], buffer_length - 1);
 477}
 478
 479/*
 480 * Adds one USB MIDI packet to the output buffer.
 481 */
 482static void snd_usbmidi_output_standard_packet(struct urb* urb, uint8_t p0,
 483					       uint8_t p1, uint8_t p2, uint8_t p3)
 484{
 485
 486	uint8_t* buf = (uint8_t*)urb->transfer_buffer + urb->transfer_buffer_length;
 487	buf[0] = p0;
 488	buf[1] = p1;
 489	buf[2] = p2;
 490	buf[3] = p3;
 491	urb->transfer_buffer_length += 4;
 492}
 493
 494/*
 495 * Adds one Midiman packet to the output buffer.
 496 */
 497static void snd_usbmidi_output_midiman_packet(struct urb* urb, uint8_t p0,
 498					      uint8_t p1, uint8_t p2, uint8_t p3)
 499{
 500
 501	uint8_t* buf = (uint8_t*)urb->transfer_buffer + urb->transfer_buffer_length;
 502	buf[0] = p1;
 503	buf[1] = p2;
 504	buf[2] = p3;
 505	buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f];
 506	urb->transfer_buffer_length += 4;
 507}
 508
 509/*
 510 * Converts MIDI commands to USB MIDI packets.
 511 */
 512static void snd_usbmidi_transmit_byte(struct usbmidi_out_port* port,
 513				      uint8_t b, struct urb* urb)
 514{
 515	uint8_t p0 = port->cable;
 516	void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) =
 517		port->ep->umidi->usb_protocol_ops->output_packet;
 518
 519	if (b >= 0xf8) {
 520		output_packet(urb, p0 | 0x0f, b, 0, 0);
 521	} else if (b >= 0xf0) {
 522		switch (b) {
 523		case 0xf0:
 524			port->data[0] = b;
 525			port->state = STATE_SYSEX_1;
 526			break;
 527		case 0xf1:
 528		case 0xf3:
 529			port->data[0] = b;
 530			port->state = STATE_1PARAM;
 531			break;
 532		case 0xf2:
 533			port->data[0] = b;
 534			port->state = STATE_2PARAM_1;
 535			break;
 536		case 0xf4:
 537		case 0xf5:
 538			port->state = STATE_UNKNOWN;
 539			break;
 540		case 0xf6:
 541			output_packet(urb, p0 | 0x05, 0xf6, 0, 0);
 542			port->state = STATE_UNKNOWN;
 543			break;
 544		case 0xf7:
 545			switch (port->state) {
 546			case STATE_SYSEX_0:
 547				output_packet(urb, p0 | 0x05, 0xf7, 0, 0);
 548				break;
 549			case STATE_SYSEX_1:
 550				output_packet(urb, p0 | 0x06, port->data[0], 0xf7, 0);
 551				break;
 552			case STATE_SYSEX_2:
 553				output_packet(urb, p0 | 0x07, port->data[0], port->data[1], 0xf7);
 554				break;
 555			}
 556			port->state = STATE_UNKNOWN;
 557			break;
 558		}
 559	} else if (b >= 0x80) {
 560		port->data[0] = b;
 561		if (b >= 0xc0 && b <= 0xdf)
 562			port->state = STATE_1PARAM;
 563		else
 564			port->state = STATE_2PARAM_1;
 565	} else { /* b < 0x80 */
 566		switch (port->state) {
 567		case STATE_1PARAM:
 568			if (port->data[0] < 0xf0) {
 569				p0 |= port->data[0] >> 4;
 570			} else {
 571				p0 |= 0x02;
 572				port->state = STATE_UNKNOWN;
 573			}
 574			output_packet(urb, p0, port->data[0], b, 0);
 575			break;
 576		case STATE_2PARAM_1:
 577			port->data[1] = b;
 578			port->state = STATE_2PARAM_2;
 579			break;
 580		case STATE_2PARAM_2:
 581			if (port->data[0] < 0xf0) {
 582				p0 |= port->data[0] >> 4;
 583				port->state = STATE_2PARAM_1;
 584			} else {
 585				p0 |= 0x03;
 586				port->state = STATE_UNKNOWN;
 587			}
 588			output_packet(urb, p0, port->data[0], port->data[1], b);
 589			break;
 590		case STATE_SYSEX_0:
 591			port->data[0] = b;
 592			port->state = STATE_SYSEX_1;
 593			break;
 594		case STATE_SYSEX_1:
 595			port->data[1] = b;
 596			port->state = STATE_SYSEX_2;
 597			break;
 598		case STATE_SYSEX_2:
 599			output_packet(urb, p0 | 0x04, port->data[0], port->data[1], b);
 600			port->state = STATE_SYSEX_0;
 601			break;
 602		}
 603	}
 604}
 605
 606static void snd_usbmidi_standard_output(struct snd_usb_midi_out_endpoint* ep,
 607					struct urb *urb)
 608{
 609	int p;
 610
 611	/* FIXME: lower-numbered ports can starve higher-numbered ports */
 612	for (p = 0; p < 0x10; ++p) {
 613		struct usbmidi_out_port* port = &ep->ports[p];
 614		if (!port->active)
 615			continue;
 616		while (urb->transfer_buffer_length + 3 < ep->max_transfer) {
 617			uint8_t b;
 618			if (snd_rawmidi_transmit(port->substream, &b, 1) != 1) {
 619				port->active = 0;
 620				break;
 621			}
 622			snd_usbmidi_transmit_byte(port, b, urb);
 623		}
 624	}
 625}
 626
 627static struct usb_protocol_ops snd_usbmidi_standard_ops = {
 628	.input = snd_usbmidi_standard_input,
 629	.output = snd_usbmidi_standard_output,
 630	.output_packet = snd_usbmidi_output_standard_packet,
 631};
 632
 633static struct usb_protocol_ops snd_usbmidi_midiman_ops = {
 634	.input = snd_usbmidi_midiman_input,
 635	.output = snd_usbmidi_standard_output,
 636	.output_packet = snd_usbmidi_output_midiman_packet,
 637};
 638
 639static struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = {
 640	.input = snd_usbmidi_maudio_broken_running_status_input,
 641	.output = snd_usbmidi_standard_output,
 642	.output_packet = snd_usbmidi_output_standard_packet,
 643};
 644
 645static struct usb_protocol_ops snd_usbmidi_cme_ops = {
 646	.input = snd_usbmidi_cme_input,
 647	.output = snd_usbmidi_standard_output,
 648	.output_packet = snd_usbmidi_output_standard_packet,
 649};
 650
 651/*
 652 * AKAI MPD16 protocol:
 653 *
 654 * For control port (endpoint 1):
 655 * ==============================
 656 * One or more chunks consisting of first byte of (0x10 | msg_len) and then a
 657 * SysEx message (msg_len=9 bytes long).
 658 *
 659 * For data port (endpoint 2):
 660 * ===========================
 661 * One or more chunks consisting of first byte of (0x20 | msg_len) and then a
 662 * MIDI message (msg_len bytes long)
 663 *
 664 * Messages sent: Active Sense, Note On, Poly Pressure, Control Change.
 665 */
 666static void snd_usbmidi_akai_input(struct snd_usb_midi_in_endpoint *ep,
 667				   uint8_t *buffer, int buffer_length)
 668{
 669	unsigned int pos = 0;
 670	unsigned int len = (unsigned int)buffer_length;
 671	while (pos < len) {
 672		unsigned int port = (buffer[pos] >> 4) - 1;
 673		unsigned int msg_len = buffer[pos] & 0x0f;
 674		pos++;
 675		if (pos + msg_len <= len && port < 2)
 676			snd_usbmidi_input_data(ep, 0, &buffer[pos], msg_len);
 677		pos += msg_len;
 678	}
 679}
 680
 681#define MAX_AKAI_SYSEX_LEN 9
 682
 683static void snd_usbmidi_akai_output(struct snd_usb_midi_out_endpoint *ep,
 684				    struct urb *urb)
 685{
 686	uint8_t *msg;
 687	int pos, end, count, buf_end;
 688	uint8_t tmp[MAX_AKAI_SYSEX_LEN];
 689	struct snd_rawmidi_substream *substream = ep->ports[0].substream;
 690
 691	if (!ep->ports[0].active)
 692		return;
 693
 694	msg = urb->transfer_buffer + urb->transfer_buffer_length;
 695	buf_end = ep->max_transfer - MAX_AKAI_SYSEX_LEN - 1;
 696
 697	/* only try adding more data when there's space for at least 1 SysEx */
 698	while (urb->transfer_buffer_length < buf_end) {
 699		count = snd_rawmidi_transmit_peek(substream,
 700						  tmp, MAX_AKAI_SYSEX_LEN);
 701		if (!count) {
 702			ep->ports[0].active = 0;
 703			return;
 704		}
 705		/* try to skip non-SysEx data */
 706		for (pos = 0; pos < count && tmp[pos] != 0xF0; pos++)
 707			;
 708
 709		if (pos > 0) {
 710			snd_rawmidi_transmit_ack(substream, pos);
 711			continue;
 712		}
 713
 714		/* look for the start or end marker */
 715		for (end = 1; end < count && tmp[end] < 0xF0; end++)
 716			;
 717
 718		/* next SysEx started before the end of current one */
 719		if (end < count && tmp[end] == 0xF0) {
 720			/* it's incomplete - drop it */
 721			snd_rawmidi_transmit_ack(substream, end);
 722			continue;
 723		}
 724		/* SysEx complete */
 725		if (end < count && tmp[end] == 0xF7) {
 726			/* queue it, ack it, and get the next one */
 727			count = end + 1;
 728			msg[0] = 0x10 | count;
 729			memcpy(&msg[1], tmp, count);
 730			snd_rawmidi_transmit_ack(substream, count);
 731			urb->transfer_buffer_length += count + 1;
 732			msg += count + 1;
 733			continue;
 734		}
 735		/* less than 9 bytes and no end byte - wait for more */
 736		if (count < MAX_AKAI_SYSEX_LEN) {
 737			ep->ports[0].active = 0;
 738			return;
 739		}
 740		/* 9 bytes and no end marker in sight - malformed, skip it */
 741		snd_rawmidi_transmit_ack(substream, count);
 742	}
 743}
 744
 745static struct usb_protocol_ops snd_usbmidi_akai_ops = {
 746	.input = snd_usbmidi_akai_input,
 747	.output = snd_usbmidi_akai_output,
 748};
 749
 750/*
 751 * Novation USB MIDI protocol: number of data bytes is in the first byte
 752 * (when receiving) (+1!) or in the second byte (when sending); data begins
 753 * at the third byte.
 754 */
 755
 756static void snd_usbmidi_novation_input(struct snd_usb_midi_in_endpoint* ep,
 757				       uint8_t* buffer, int buffer_length)
 758{
 759	if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1)
 760		return;
 761	snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1);
 762}
 763
 764static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint* ep,
 765					struct urb *urb)
 766{
 767	uint8_t* transfer_buffer;
 768	int count;
 769
 770	if (!ep->ports[0].active)
 771		return;
 772	transfer_buffer = urb->transfer_buffer;
 773	count = snd_rawmidi_transmit(ep->ports[0].substream,
 774				     &transfer_buffer[2],
 775				     ep->max_transfer - 2);
 776	if (count < 1) {
 777		ep->ports[0].active = 0;
 778		return;
 779	}
 780	transfer_buffer[0] = 0;
 781	transfer_buffer[1] = count;
 782	urb->transfer_buffer_length = 2 + count;
 783}
 784
 785static struct usb_protocol_ops snd_usbmidi_novation_ops = {
 786	.input = snd_usbmidi_novation_input,
 787	.output = snd_usbmidi_novation_output,
 788};
 789
 790/*
 791 * "raw" protocol: just move raw MIDI bytes from/to the endpoint
 792 */
 793
 794static void snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint* ep,
 795				  uint8_t* buffer, int buffer_length)
 796{
 797	snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
 798}
 799
 800static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint* ep,
 801				   struct urb *urb)
 802{
 803	int count;
 804
 805	if (!ep->ports[0].active)
 806		return;
 807	count = snd_rawmidi_transmit(ep->ports[0].substream,
 808				     urb->transfer_buffer,
 809				     ep->max_transfer);
 810	if (count < 1) {
 811		ep->ports[0].active = 0;
 812		return;
 813	}
 814	urb->transfer_buffer_length = count;
 815}
 816
 817static struct usb_protocol_ops snd_usbmidi_raw_ops = {
 818	.input = snd_usbmidi_raw_input,
 819	.output = snd_usbmidi_raw_output,
 820};
 821
 822/*
 823 * FTDI protocol: raw MIDI bytes, but input packets have two modem status bytes.
 824 */
 825
 826static void snd_usbmidi_ftdi_input(struct snd_usb_midi_in_endpoint* ep,
 827				   uint8_t* buffer, int buffer_length)
 828{
 829	if (buffer_length > 2)
 830		snd_usbmidi_input_data(ep, 0, buffer + 2, buffer_length - 2);
 831}
 832
 833static struct usb_protocol_ops snd_usbmidi_ftdi_ops = {
 834	.input = snd_usbmidi_ftdi_input,
 835	.output = snd_usbmidi_raw_output,
 836};
 837
 838static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep,
 839				     uint8_t *buffer, int buffer_length)
 840{
 841	if (buffer_length != 9)
 842		return;
 843	buffer_length = 8;
 844	while (buffer_length && buffer[buffer_length - 1] == 0xFD)
 845		buffer_length--;
 846	if (buffer_length)
 847		snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
 848}
 849
 850static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep,
 851				      struct urb *urb)
 852{
 853	int count;
 854
 855	if (!ep->ports[0].active)
 856		return;
 857	switch (snd_usb_get_speed(ep->umidi->dev)) {
 858	case USB_SPEED_HIGH:
 859	case USB_SPEED_SUPER:
 860		count = 1;
 861		break;
 862	default:
 863		count = 2;
 864	}
 865	count = snd_rawmidi_transmit(ep->ports[0].substream,
 866				     urb->transfer_buffer,
 867				     count);
 868	if (count < 1) {
 869		ep->ports[0].active = 0;
 870		return;
 871	}
 872
 873	memset(urb->transfer_buffer + count, 0xFD, ep->max_transfer - count);
 874	urb->transfer_buffer_length = ep->max_transfer;
 875}
 876
 877static struct usb_protocol_ops snd_usbmidi_122l_ops = {
 878	.input = snd_usbmidi_us122l_input,
 879	.output = snd_usbmidi_us122l_output,
 880};
 881
 882/*
 883 * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching.
 884 */
 885
 886static void snd_usbmidi_emagic_init_out(struct snd_usb_midi_out_endpoint* ep)
 887{
 888	static const u8 init_data[] = {
 889		/* initialization magic: "get version" */
 890		0xf0,
 891		0x00, 0x20, 0x31,	/* Emagic */
 892		0x64,			/* Unitor8 */
 893		0x0b,			/* version number request */
 894		0x00,			/* command version */
 895		0x00,			/* EEPROM, box 0 */
 896		0xf7
 897	};
 898	send_bulk_static_data(ep, init_data, sizeof(init_data));
 899	/* while we're at it, pour on more magic */
 900	send_bulk_static_data(ep, init_data, sizeof(init_data));
 901}
 902
 903static void snd_usbmidi_emagic_finish_out(struct snd_usb_midi_out_endpoint* ep)
 904{
 905	static const u8 finish_data[] = {
 906		/* switch to patch mode with last preset */
 907		0xf0,
 908		0x00, 0x20, 0x31,	/* Emagic */
 909		0x64,			/* Unitor8 */
 910		0x10,			/* patch switch command */
 911		0x00,			/* command version */
 912		0x7f,			/* to all boxes */
 913		0x40,			/* last preset in EEPROM */
 914		0xf7
 915	};
 916	send_bulk_static_data(ep, finish_data, sizeof(finish_data));
 917}
 918
 919static void snd_usbmidi_emagic_input(struct snd_usb_midi_in_endpoint* ep,
 920				     uint8_t* buffer, int buffer_length)
 921{
 922	int i;
 923
 924	/* FF indicates end of valid data */
 925	for (i = 0; i < buffer_length; ++i)
 926		if (buffer[i] == 0xff) {
 927			buffer_length = i;
 928			break;
 929		}
 930
 931	/* handle F5 at end of last buffer */
 932	if (ep->seen_f5)
 933		goto switch_port;
 934
 935	while (buffer_length > 0) {
 936		/* determine size of data until next F5 */
 937		for (i = 0; i < buffer_length; ++i)
 938			if (buffer[i] == 0xf5)
 939				break;
 940		snd_usbmidi_input_data(ep, ep->current_port, buffer, i);
 941		buffer += i;
 942		buffer_length -= i;
 943
 944		if (buffer_length <= 0)
 945			break;
 946		/* assert(buffer[0] == 0xf5); */
 947		ep->seen_f5 = 1;
 948		++buffer;
 949		--buffer_length;
 950
 951	switch_port:
 952		if (buffer_length <= 0)
 953			break;
 954		if (buffer[0] < 0x80) {
 955			ep->current_port = (buffer[0] - 1) & 15;
 956			++buffer;
 957			--buffer_length;
 958		}
 959		ep->seen_f5 = 0;
 960	}
 961}
 962
 963static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint* ep,
 964				      struct urb *urb)
 965{
 966	int port0 = ep->current_port;
 967	uint8_t* buf = urb->transfer_buffer;
 968	int buf_free = ep->max_transfer;
 969	int length, i;
 970
 971	for (i = 0; i < 0x10; ++i) {
 972		/* round-robin, starting at the last current port */
 973		int portnum = (port0 + i) & 15;
 974		struct usbmidi_out_port* port = &ep->ports[portnum];
 975
 976		if (!port->active)
 977			continue;
 978		if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) {
 979			port->active = 0;
 980			continue;
 981		}
 982
 983		if (portnum != ep->current_port) {
 984			if (buf_free < 2)
 985				break;
 986			ep->current_port = portnum;
 987			buf[0] = 0xf5;
 988			buf[1] = (portnum + 1) & 15;
 989			buf += 2;
 990			buf_free -= 2;
 991		}
 992
 993		if (buf_free < 1)
 994			break;
 995		length = snd_rawmidi_transmit(port->substream, buf, buf_free);
 996		if (length > 0) {
 997			buf += length;
 998			buf_free -= length;
 999			if (buf_free < 1)
1000				break;
1001		}
1002	}
1003	if (buf_free < ep->max_transfer && buf_free > 0) {
1004		*buf = 0xff;
1005		--buf_free;
1006	}
1007	urb->transfer_buffer_length = ep->max_transfer - buf_free;
1008}
1009
1010static struct usb_protocol_ops snd_usbmidi_emagic_ops = {
1011	.input = snd_usbmidi_emagic_input,
1012	.output = snd_usbmidi_emagic_output,
1013	.init_out_endpoint = snd_usbmidi_emagic_init_out,
1014	.finish_out_endpoint = snd_usbmidi_emagic_finish_out,
1015};
1016
1017
1018static void update_roland_altsetting(struct snd_usb_midi* umidi)
1019{
1020	struct usb_interface *intf;
1021	struct usb_host_interface *hostif;
1022	struct usb_interface_descriptor *intfd;
1023	int is_light_load;
1024
1025	intf = umidi->iface;
1026	is_light_load = intf->cur_altsetting != intf->altsetting;
1027	if (umidi->roland_load_ctl->private_value == is_light_load)
1028		return;
1029	hostif = &intf->altsetting[umidi->roland_load_ctl->private_value];
1030	intfd = get_iface_desc(hostif);
1031	snd_usbmidi_input_stop(&umidi->list);
1032	usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
1033			  intfd->bAlternateSetting);
1034	snd_usbmidi_input_start(&umidi->list);
1035}
1036
1037static int substream_open(struct snd_rawmidi_substream *substream, int dir,
1038			  int open)
1039{
1040	struct snd_usb_midi* umidi = substream->rmidi->private_data;
1041	struct snd_kcontrol *ctl;
1042
1043	down_read(&umidi->disc_rwsem);
1044	if (umidi->disconnected) {
1045		up_read(&umidi->disc_rwsem);
1046		return open ? -ENODEV : 0;
1047	}
1048
1049	mutex_lock(&umidi->mutex);
1050	if (open) {
1051		if (!umidi->opened[0] && !umidi->opened[1]) {
1052			if (umidi->roland_load_ctl) {
1053				ctl = umidi->roland_load_ctl;
1054				ctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1055				snd_ctl_notify(umidi->card,
1056				       SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
1057				update_roland_altsetting(umidi);
1058			}
1059		}
1060		umidi->opened[dir]++;
1061		if (umidi->opened[1])
1062			snd_usbmidi_input_start(&umidi->list);
1063	} else {
1064		umidi->opened[dir]--;
1065		if (!umidi->opened[1])
1066			snd_usbmidi_input_stop(&umidi->list);
1067		if (!umidi->opened[0] && !umidi->opened[1]) {
1068			if (umidi->roland_load_ctl) {
1069				ctl = umidi->roland_load_ctl;
1070				ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1071				snd_ctl_notify(umidi->card,
1072				       SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
1073			}
1074		}
1075	}
1076	mutex_unlock(&umidi->mutex);
1077	up_read(&umidi->disc_rwsem);
1078	return 0;
1079}
1080
1081static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream)
1082{
1083	struct snd_usb_midi* umidi = substream->rmidi->private_data;
1084	struct usbmidi_out_port* port = NULL;
1085	int i, j;
 
1086
1087	for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
1088		if (umidi->endpoints[i].out)
1089			for (j = 0; j < 0x10; ++j)
1090				if (umidi->endpoints[i].out->ports[j].substream == substream) {
1091					port = &umidi->endpoints[i].out->ports[j];
1092					break;
1093				}
1094	if (!port) {
1095		snd_BUG();
1096		return -ENXIO;
1097	}
1098
 
 
1099	substream->runtime->private_data = port;
1100	port->state = STATE_UNKNOWN;
1101	return substream_open(substream, 0, 1);
 
1102}
1103
1104static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream)
1105{
1106	return substream_open(substream, 0, 0);
 
 
 
 
1107}
1108
1109static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream, int up)
1110{
1111	struct usbmidi_out_port* port = (struct usbmidi_out_port*)substream->runtime->private_data;
1112
1113	port->active = up;
1114	if (up) {
1115		if (port->ep->umidi->disconnected) {
1116			/* gobble up remaining bytes to prevent wait in
1117			 * snd_rawmidi_drain_output */
1118			while (!snd_rawmidi_transmit_empty(substream))
1119				snd_rawmidi_transmit_ack(substream, 1);
1120			return;
1121		}
1122		tasklet_schedule(&port->ep->tasklet);
1123	}
1124}
1125
1126static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream)
1127{
1128	struct usbmidi_out_port* port = substream->runtime->private_data;
1129	struct snd_usb_midi_out_endpoint *ep = port->ep;
1130	unsigned int drain_urbs;
1131	DEFINE_WAIT(wait);
1132	long timeout = msecs_to_jiffies(50);
1133
1134	if (ep->umidi->disconnected)
1135		return;
1136	/*
1137	 * The substream buffer is empty, but some data might still be in the
1138	 * currently active URBs, so we have to wait for those to complete.
1139	 */
1140	spin_lock_irq(&ep->buffer_lock);
1141	drain_urbs = ep->active_urbs;
1142	if (drain_urbs) {
1143		ep->drain_urbs |= drain_urbs;
1144		do {
1145			prepare_to_wait(&ep->drain_wait, &wait,
1146					TASK_UNINTERRUPTIBLE);
1147			spin_unlock_irq(&ep->buffer_lock);
1148			timeout = schedule_timeout(timeout);
1149			spin_lock_irq(&ep->buffer_lock);
1150			drain_urbs &= ep->drain_urbs;
1151		} while (drain_urbs && timeout);
1152		finish_wait(&ep->drain_wait, &wait);
1153	}
1154	spin_unlock_irq(&ep->buffer_lock);
1155}
1156
1157static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream)
1158{
1159	return substream_open(substream, 1, 1);
 
1160}
1161
1162static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream)
1163{
1164	return substream_open(substream, 1, 0);
 
1165}
1166
1167static void snd_usbmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
1168{
1169	struct snd_usb_midi* umidi = substream->rmidi->private_data;
1170
1171	if (up)
1172		set_bit(substream->number, &umidi->input_triggered);
1173	else
1174		clear_bit(substream->number, &umidi->input_triggered);
1175}
1176
1177static struct snd_rawmidi_ops snd_usbmidi_output_ops = {
1178	.open = snd_usbmidi_output_open,
1179	.close = snd_usbmidi_output_close,
1180	.trigger = snd_usbmidi_output_trigger,
1181	.drain = snd_usbmidi_output_drain,
1182};
1183
1184static struct snd_rawmidi_ops snd_usbmidi_input_ops = {
1185	.open = snd_usbmidi_input_open,
1186	.close = snd_usbmidi_input_close,
1187	.trigger = snd_usbmidi_input_trigger
1188};
1189
1190static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb,
1191				unsigned int buffer_length)
1192{
1193	usb_free_coherent(umidi->dev, buffer_length,
1194			  urb->transfer_buffer, urb->transfer_dma);
1195	usb_free_urb(urb);
1196}
1197
1198/*
1199 * Frees an input endpoint.
1200 * May be called when ep hasn't been initialized completely.
1201 */
1202static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint* ep)
1203{
1204	unsigned int i;
1205
1206	for (i = 0; i < INPUT_URBS; ++i)
1207		if (ep->urbs[i])
1208			free_urb_and_buffer(ep->umidi, ep->urbs[i],
1209					    ep->urbs[i]->transfer_buffer_length);
1210	kfree(ep);
1211}
1212
1213/*
1214 * Creates an input endpoint.
1215 */
1216static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi* umidi,
1217					  struct snd_usb_midi_endpoint_info* ep_info,
1218					  struct snd_usb_midi_endpoint* rep)
1219{
1220	struct snd_usb_midi_in_endpoint* ep;
1221	void* buffer;
1222	unsigned int pipe;
1223	int length;
1224	unsigned int i;
1225
1226	rep->in = NULL;
1227	ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1228	if (!ep)
1229		return -ENOMEM;
1230	ep->umidi = umidi;
1231
1232	for (i = 0; i < INPUT_URBS; ++i) {
1233		ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
1234		if (!ep->urbs[i]) {
1235			snd_usbmidi_in_endpoint_delete(ep);
1236			return -ENOMEM;
1237		}
1238	}
1239	if (ep_info->in_interval)
1240		pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep);
1241	else
1242		pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep);
1243	length = usb_maxpacket(umidi->dev, pipe, 0);
1244	for (i = 0; i < INPUT_URBS; ++i) {
1245		buffer = usb_alloc_coherent(umidi->dev, length, GFP_KERNEL,
1246					    &ep->urbs[i]->transfer_dma);
1247		if (!buffer) {
1248			snd_usbmidi_in_endpoint_delete(ep);
1249			return -ENOMEM;
1250		}
1251		if (ep_info->in_interval)
1252			usb_fill_int_urb(ep->urbs[i], umidi->dev,
1253					 pipe, buffer, length,
1254					 snd_usbmidi_in_urb_complete,
1255					 ep, ep_info->in_interval);
1256		else
1257			usb_fill_bulk_urb(ep->urbs[i], umidi->dev,
1258					  pipe, buffer, length,
1259					  snd_usbmidi_in_urb_complete, ep);
1260		ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1261	}
1262
1263	rep->in = ep;
1264	return 0;
1265}
1266
1267/*
1268 * Frees an output endpoint.
1269 * May be called when ep hasn't been initialized completely.
1270 */
1271static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep)
1272{
1273	unsigned int i;
1274
1275	for (i = 0; i < OUTPUT_URBS; ++i)
1276		if (ep->urbs[i].urb) {
1277			free_urb_and_buffer(ep->umidi, ep->urbs[i].urb,
1278					    ep->max_transfer);
1279			ep->urbs[i].urb = NULL;
1280		}
1281}
1282
1283static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep)
1284{
1285	snd_usbmidi_out_endpoint_clear(ep);
1286	kfree(ep);
1287}
1288
1289/*
1290 * Creates an output endpoint, and initializes output ports.
1291 */
1292static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi* umidi,
1293					   struct snd_usb_midi_endpoint_info* ep_info,
1294					   struct snd_usb_midi_endpoint* rep)
1295{
1296	struct snd_usb_midi_out_endpoint* ep;
1297	unsigned int i;
1298	unsigned int pipe;
1299	void* buffer;
1300
1301	rep->out = NULL;
1302	ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1303	if (!ep)
1304		return -ENOMEM;
1305	ep->umidi = umidi;
1306
1307	for (i = 0; i < OUTPUT_URBS; ++i) {
1308		ep->urbs[i].urb = usb_alloc_urb(0, GFP_KERNEL);
1309		if (!ep->urbs[i].urb) {
1310			snd_usbmidi_out_endpoint_delete(ep);
1311			return -ENOMEM;
1312		}
1313		ep->urbs[i].ep = ep;
1314	}
1315	if (ep_info->out_interval)
1316		pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep);
1317	else
1318		pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep);
1319	switch (umidi->usb_id) {
1320	default:
1321		ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1);
1322		break;
1323		/*
1324		 * Various chips declare a packet size larger than 4 bytes, but
1325		 * do not actually work with larger packets:
1326		 */
1327	case USB_ID(0x0a92, 0x1020): /* ESI M4U */
1328	case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */
1329	case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */
1330	case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */
1331	case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */
1332	case USB_ID(0xfc08, 0x0101): /* Unknown vendor Cable */
1333		ep->max_transfer = 4;
1334		break;
1335		/*
1336		 * Some devices only work with 9 bytes packet size:
1337		 */
1338	case USB_ID(0x0644, 0x800E): /* Tascam US-122L */
1339	case USB_ID(0x0644, 0x800F): /* Tascam US-144 */
1340		ep->max_transfer = 9;
1341		break;
1342	}
1343	for (i = 0; i < OUTPUT_URBS; ++i) {
1344		buffer = usb_alloc_coherent(umidi->dev,
1345					    ep->max_transfer, GFP_KERNEL,
1346					    &ep->urbs[i].urb->transfer_dma);
1347		if (!buffer) {
1348			snd_usbmidi_out_endpoint_delete(ep);
1349			return -ENOMEM;
1350		}
1351		if (ep_info->out_interval)
1352			usb_fill_int_urb(ep->urbs[i].urb, umidi->dev,
1353					 pipe, buffer, ep->max_transfer,
1354					 snd_usbmidi_out_urb_complete,
1355					 &ep->urbs[i], ep_info->out_interval);
1356		else
1357			usb_fill_bulk_urb(ep->urbs[i].urb, umidi->dev,
1358					  pipe, buffer, ep->max_transfer,
1359					  snd_usbmidi_out_urb_complete,
1360					  &ep->urbs[i]);
1361		ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1362	}
1363
1364	spin_lock_init(&ep->buffer_lock);
1365	tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep);
1366	init_waitqueue_head(&ep->drain_wait);
1367
1368	for (i = 0; i < 0x10; ++i)
1369		if (ep_info->out_cables & (1 << i)) {
1370			ep->ports[i].ep = ep;
1371			ep->ports[i].cable = i << 4;
1372		}
1373
1374	if (umidi->usb_protocol_ops->init_out_endpoint)
1375		umidi->usb_protocol_ops->init_out_endpoint(ep);
1376
1377	rep->out = ep;
1378	return 0;
1379}
1380
1381/*
1382 * Frees everything.
1383 */
1384static void snd_usbmidi_free(struct snd_usb_midi* umidi)
1385{
1386	int i;
1387
1388	for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1389		struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
1390		if (ep->out)
1391			snd_usbmidi_out_endpoint_delete(ep->out);
1392		if (ep->in)
1393			snd_usbmidi_in_endpoint_delete(ep->in);
1394	}
1395	mutex_destroy(&umidi->mutex);
1396	kfree(umidi);
1397}
1398
1399/*
1400 * Unlinks all URBs (must be done before the usb_device is deleted).
1401 */
1402void snd_usbmidi_disconnect(struct list_head* p)
1403{
1404	struct snd_usb_midi* umidi;
1405	unsigned int i, j;
1406
1407	umidi = list_entry(p, struct snd_usb_midi, list);
1408	/*
1409	 * an URB's completion handler may start the timer and
1410	 * a timer may submit an URB. To reliably break the cycle
1411	 * a flag under lock must be used
1412	 */
1413	down_write(&umidi->disc_rwsem);
1414	spin_lock_irq(&umidi->disc_lock);
1415	umidi->disconnected = 1;
1416	spin_unlock_irq(&umidi->disc_lock);
1417	up_write(&umidi->disc_rwsem);
1418
1419	for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1420		struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
1421		if (ep->out)
1422			tasklet_kill(&ep->out->tasklet);
1423		if (ep->out) {
1424			for (j = 0; j < OUTPUT_URBS; ++j)
1425				usb_kill_urb(ep->out->urbs[j].urb);
1426			if (umidi->usb_protocol_ops->finish_out_endpoint)
1427				umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
1428			ep->out->active_urbs = 0;
1429			if (ep->out->drain_urbs) {
1430				ep->out->drain_urbs = 0;
1431				wake_up(&ep->out->drain_wait);
1432			}
1433		}
1434		if (ep->in)
1435			for (j = 0; j < INPUT_URBS; ++j)
1436				usb_kill_urb(ep->in->urbs[j]);
1437		/* free endpoints here; later call can result in Oops */
1438		if (ep->out)
1439			snd_usbmidi_out_endpoint_clear(ep->out);
1440		if (ep->in) {
1441			snd_usbmidi_in_endpoint_delete(ep->in);
1442			ep->in = NULL;
1443		}
1444	}
1445	del_timer_sync(&umidi->error_timer);
1446}
1447EXPORT_SYMBOL(snd_usbmidi_disconnect);
1448
1449static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi)
1450{
1451	struct snd_usb_midi* umidi = rmidi->private_data;
1452	snd_usbmidi_free(umidi);
1453}
1454
1455static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi* umidi,
1456								int stream, int number)
1457{
1458	struct snd_rawmidi_substream *substream;
1459
1460	list_for_each_entry(substream, &umidi->rmidi->streams[stream].substreams, list) {
 
1461		if (substream->number == number)
1462			return substream;
1463	}
1464	return NULL;
1465}
1466
1467/*
1468 * This list specifies names for ports that do not fit into the standard
1469 * "(product) MIDI (n)" schema because they aren't external MIDI ports,
1470 * such as internal control or synthesizer ports.
1471 */
1472static struct port_info {
1473	u32 id;
1474	short int port;
1475	short int voices;
1476	const char *name;
1477	unsigned int seq_flags;
1478} snd_usbmidi_port_info[] = {
1479#define PORT_INFO(vendor, product, num, name_, voices_, flags) \
1480	{ .id = USB_ID(vendor, product), \
1481	  .port = num, .voices = voices_, \
1482	  .name = name_, .seq_flags = flags }
1483#define EXTERNAL_PORT(vendor, product, num, name) \
1484	PORT_INFO(vendor, product, num, name, 0, \
1485		  SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1486		  SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1487		  SNDRV_SEQ_PORT_TYPE_PORT)
1488#define CONTROL_PORT(vendor, product, num, name) \
1489	PORT_INFO(vendor, product, num, name, 0, \
1490		  SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1491		  SNDRV_SEQ_PORT_TYPE_HARDWARE)
1492#define ROLAND_SYNTH_PORT(vendor, product, num, name, voices) \
1493	PORT_INFO(vendor, product, num, name, voices, \
1494		  SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1495		  SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1496		  SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1497		  SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1498		  SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1499		  SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1500		  SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1501#define SOUNDCANVAS_PORT(vendor, product, num, name, voices) \
1502	PORT_INFO(vendor, product, num, name, voices, \
1503		  SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1504		  SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1505		  SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1506		  SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1507		  SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1508		  SNDRV_SEQ_PORT_TYPE_MIDI_MT32 | \
1509		  SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1510		  SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1511	/* Roland UA-100 */
1512	CONTROL_PORT(0x0582, 0x0000, 2, "%s Control"),
1513	/* Roland SC-8850 */
1514	SOUNDCANVAS_PORT(0x0582, 0x0003, 0, "%s Part A", 128),
1515	SOUNDCANVAS_PORT(0x0582, 0x0003, 1, "%s Part B", 128),
1516	SOUNDCANVAS_PORT(0x0582, 0x0003, 2, "%s Part C", 128),
1517	SOUNDCANVAS_PORT(0x0582, 0x0003, 3, "%s Part D", 128),
1518	EXTERNAL_PORT(0x0582, 0x0003, 4, "%s MIDI 1"),
1519	EXTERNAL_PORT(0x0582, 0x0003, 5, "%s MIDI 2"),
1520	/* Roland U-8 */
1521	EXTERNAL_PORT(0x0582, 0x0004, 0, "%s MIDI"),
1522	CONTROL_PORT(0x0582, 0x0004, 1, "%s Control"),
1523	/* Roland SC-8820 */
1524	SOUNDCANVAS_PORT(0x0582, 0x0007, 0, "%s Part A", 64),
1525	SOUNDCANVAS_PORT(0x0582, 0x0007, 1, "%s Part B", 64),
1526	EXTERNAL_PORT(0x0582, 0x0007, 2, "%s MIDI"),
1527	/* Roland SK-500 */
1528	SOUNDCANVAS_PORT(0x0582, 0x000b, 0, "%s Part A", 64),
1529	SOUNDCANVAS_PORT(0x0582, 0x000b, 1, "%s Part B", 64),
1530	EXTERNAL_PORT(0x0582, 0x000b, 2, "%s MIDI"),
1531	/* Roland SC-D70 */
1532	SOUNDCANVAS_PORT(0x0582, 0x000c, 0, "%s Part A", 64),
1533	SOUNDCANVAS_PORT(0x0582, 0x000c, 1, "%s Part B", 64),
1534	EXTERNAL_PORT(0x0582, 0x000c, 2, "%s MIDI"),
1535	/* Edirol UM-880 */
1536	CONTROL_PORT(0x0582, 0x0014, 8, "%s Control"),
1537	/* Edirol SD-90 */
1538	ROLAND_SYNTH_PORT(0x0582, 0x0016, 0, "%s Part A", 128),
1539	ROLAND_SYNTH_PORT(0x0582, 0x0016, 1, "%s Part B", 128),
1540	EXTERNAL_PORT(0x0582, 0x0016, 2, "%s MIDI 1"),
1541	EXTERNAL_PORT(0x0582, 0x0016, 3, "%s MIDI 2"),
1542	/* Edirol UM-550 */
1543	CONTROL_PORT(0x0582, 0x0023, 5, "%s Control"),
1544	/* Edirol SD-20 */
1545	ROLAND_SYNTH_PORT(0x0582, 0x0027, 0, "%s Part A", 64),
1546	ROLAND_SYNTH_PORT(0x0582, 0x0027, 1, "%s Part B", 64),
1547	EXTERNAL_PORT(0x0582, 0x0027, 2, "%s MIDI"),
1548	/* Edirol SD-80 */
1549	ROLAND_SYNTH_PORT(0x0582, 0x0029, 0, "%s Part A", 128),
1550	ROLAND_SYNTH_PORT(0x0582, 0x0029, 1, "%s Part B", 128),
1551	EXTERNAL_PORT(0x0582, 0x0029, 2, "%s MIDI 1"),
1552	EXTERNAL_PORT(0x0582, 0x0029, 3, "%s MIDI 2"),
1553	/* Edirol UA-700 */
1554	EXTERNAL_PORT(0x0582, 0x002b, 0, "%s MIDI"),
1555	CONTROL_PORT(0x0582, 0x002b, 1, "%s Control"),
1556	/* Roland VariOS */
1557	EXTERNAL_PORT(0x0582, 0x002f, 0, "%s MIDI"),
1558	EXTERNAL_PORT(0x0582, 0x002f, 1, "%s External MIDI"),
1559	EXTERNAL_PORT(0x0582, 0x002f, 2, "%s Sync"),
1560	/* Edirol PCR */
1561	EXTERNAL_PORT(0x0582, 0x0033, 0, "%s MIDI"),
1562	EXTERNAL_PORT(0x0582, 0x0033, 1, "%s 1"),
1563	EXTERNAL_PORT(0x0582, 0x0033, 2, "%s 2"),
1564	/* BOSS GS-10 */
1565	EXTERNAL_PORT(0x0582, 0x003b, 0, "%s MIDI"),
1566	CONTROL_PORT(0x0582, 0x003b, 1, "%s Control"),
1567	/* Edirol UA-1000 */
1568	EXTERNAL_PORT(0x0582, 0x0044, 0, "%s MIDI"),
1569	CONTROL_PORT(0x0582, 0x0044, 1, "%s Control"),
1570	/* Edirol UR-80 */
1571	EXTERNAL_PORT(0x0582, 0x0048, 0, "%s MIDI"),
1572	EXTERNAL_PORT(0x0582, 0x0048, 1, "%s 1"),
1573	EXTERNAL_PORT(0x0582, 0x0048, 2, "%s 2"),
1574	/* Edirol PCR-A */
1575	EXTERNAL_PORT(0x0582, 0x004d, 0, "%s MIDI"),
1576	EXTERNAL_PORT(0x0582, 0x004d, 1, "%s 1"),
1577	EXTERNAL_PORT(0x0582, 0x004d, 2, "%s 2"),
1578	/* BOSS GT-PRO */
1579	CONTROL_PORT(0x0582, 0x0089, 0, "%s Control"),
1580	/* Edirol UM-3EX */
1581	CONTROL_PORT(0x0582, 0x009a, 3, "%s Control"),
1582	/* Roland VG-99 */
1583	CONTROL_PORT(0x0582, 0x00b2, 0, "%s Control"),
1584	EXTERNAL_PORT(0x0582, 0x00b2, 1, "%s MIDI"),
1585	/* Cakewalk Sonar V-Studio 100 */
1586	EXTERNAL_PORT(0x0582, 0x00eb, 0, "%s MIDI"),
1587	CONTROL_PORT(0x0582, 0x00eb, 1, "%s Control"),
1588	/* Roland VB-99 */
1589	CONTROL_PORT(0x0582, 0x0102, 0, "%s Control"),
1590	EXTERNAL_PORT(0x0582, 0x0102, 1, "%s MIDI"),
1591	/* Roland A-PRO */
1592	EXTERNAL_PORT(0x0582, 0x010f, 0, "%s MIDI"),
1593	CONTROL_PORT(0x0582, 0x010f, 1, "%s 1"),
1594	CONTROL_PORT(0x0582, 0x010f, 2, "%s 2"),
1595	/* Roland SD-50 */
1596	ROLAND_SYNTH_PORT(0x0582, 0x0114, 0, "%s Synth", 128),
1597	EXTERNAL_PORT(0x0582, 0x0114, 1, "%s MIDI"),
1598	CONTROL_PORT(0x0582, 0x0114, 2, "%s Control"),
1599	/* Roland OCTA-CAPTURE */
1600	EXTERNAL_PORT(0x0582, 0x0120, 0, "%s MIDI"),
1601	CONTROL_PORT(0x0582, 0x0120, 1, "%s Control"),
1602	EXTERNAL_PORT(0x0582, 0x0121, 0, "%s MIDI"),
1603	CONTROL_PORT(0x0582, 0x0121, 1, "%s Control"),
1604	/* Roland SPD-SX */
1605	CONTROL_PORT(0x0582, 0x0145, 0, "%s Control"),
1606	EXTERNAL_PORT(0x0582, 0x0145, 1, "%s MIDI"),
1607	/* Roland A-Series */
1608	CONTROL_PORT(0x0582, 0x0156, 0, "%s Keyboard"),
1609	EXTERNAL_PORT(0x0582, 0x0156, 1, "%s MIDI"),
1610	/* Roland INTEGRA-7 */
1611	ROLAND_SYNTH_PORT(0x0582, 0x015b, 0, "%s Synth", 128),
1612	CONTROL_PORT(0x0582, 0x015b, 1, "%s Control"),
1613	/* M-Audio MidiSport 8x8 */
1614	CONTROL_PORT(0x0763, 0x1031, 8, "%s Control"),
1615	CONTROL_PORT(0x0763, 0x1033, 8, "%s Control"),
1616	/* MOTU Fastlane */
1617	EXTERNAL_PORT(0x07fd, 0x0001, 0, "%s MIDI A"),
1618	EXTERNAL_PORT(0x07fd, 0x0001, 1, "%s MIDI B"),
1619	/* Emagic Unitor8/AMT8/MT4 */
1620	EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"),
1621	EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"),
1622	EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"),
1623	/* Akai MPD16 */
1624	CONTROL_PORT(0x09e8, 0x0062, 0, "%s Control"),
1625	PORT_INFO(0x09e8, 0x0062, 1, "%s MIDI", 0,
1626		SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1627		SNDRV_SEQ_PORT_TYPE_HARDWARE),
1628	/* Access Music Virus TI */
1629	EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"),
1630	PORT_INFO(0x133e, 0x0815, 1, "%s Synth", 0,
1631		SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1632		SNDRV_SEQ_PORT_TYPE_HARDWARE |
1633		SNDRV_SEQ_PORT_TYPE_SYNTHESIZER),
1634};
1635
1636static struct port_info *find_port_info(struct snd_usb_midi* umidi, int number)
1637{
1638	int i;
1639
1640	for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) {
1641		if (snd_usbmidi_port_info[i].id == umidi->usb_id &&
1642		    snd_usbmidi_port_info[i].port == number)
1643			return &snd_usbmidi_port_info[i];
1644	}
1645	return NULL;
1646}
1647
1648static void snd_usbmidi_get_port_info(struct snd_rawmidi *rmidi, int number,
1649				      struct snd_seq_port_info *seq_port_info)
1650{
1651	struct snd_usb_midi *umidi = rmidi->private_data;
1652	struct port_info *port_info;
1653
1654	/* TODO: read port flags from descriptors */
1655	port_info = find_port_info(umidi, number);
1656	if (port_info) {
1657		seq_port_info->type = port_info->seq_flags;
1658		seq_port_info->midi_voices = port_info->voices;
1659	}
1660}
1661
1662static void snd_usbmidi_init_substream(struct snd_usb_midi* umidi,
1663				       int stream, int number,
1664				       struct snd_rawmidi_substream ** rsubstream)
1665{
1666	struct port_info *port_info;
1667	const char *name_format;
1668
1669	struct snd_rawmidi_substream *substream = snd_usbmidi_find_substream(umidi, stream, number);
1670	if (!substream) {
1671		dev_err(&umidi->dev->dev, "substream %d:%d not found\n", stream, number);
1672		return;
1673	}
1674
1675	/* TODO: read port name from jack descriptor */
1676	port_info = find_port_info(umidi, number);
1677	name_format = port_info ? port_info->name : "%s MIDI %d";
1678	snprintf(substream->name, sizeof(substream->name),
1679		 name_format, umidi->card->shortname, number + 1);
1680
1681	*rsubstream = substream;
1682}
1683
1684/*
1685 * Creates the endpoints and their ports.
1686 */
1687static int snd_usbmidi_create_endpoints(struct snd_usb_midi* umidi,
1688					struct snd_usb_midi_endpoint_info* endpoints)
1689{
1690	int i, j, err;
1691	int out_ports = 0, in_ports = 0;
1692
1693	for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1694		if (endpoints[i].out_cables) {
1695			err = snd_usbmidi_out_endpoint_create(umidi, &endpoints[i],
1696							      &umidi->endpoints[i]);
1697			if (err < 0)
1698				return err;
1699		}
1700		if (endpoints[i].in_cables) {
1701			err = snd_usbmidi_in_endpoint_create(umidi, &endpoints[i],
1702							     &umidi->endpoints[i]);
1703			if (err < 0)
1704				return err;
1705		}
1706
1707		for (j = 0; j < 0x10; ++j) {
1708			if (endpoints[i].out_cables & (1 << j)) {
1709				snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, out_ports,
1710							   &umidi->endpoints[i].out->ports[j].substream);
1711				++out_ports;
1712			}
1713			if (endpoints[i].in_cables & (1 << j)) {
1714				snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, in_ports,
1715							   &umidi->endpoints[i].in->ports[j].substream);
1716				++in_ports;
1717			}
1718		}
1719	}
1720	dev_dbg(&umidi->dev->dev, "created %d output and %d input ports\n",
1721		    out_ports, in_ports);
1722	return 0;
1723}
1724
1725/*
1726 * Returns MIDIStreaming device capabilities.
1727 */
1728static int snd_usbmidi_get_ms_info(struct snd_usb_midi* umidi,
1729			   	   struct snd_usb_midi_endpoint_info* endpoints)
1730{
1731	struct usb_interface* intf;
1732	struct usb_host_interface *hostif;
1733	struct usb_interface_descriptor* intfd;
1734	struct usb_ms_header_descriptor* ms_header;
1735	struct usb_host_endpoint *hostep;
1736	struct usb_endpoint_descriptor* ep;
1737	struct usb_ms_endpoint_descriptor* ms_ep;
1738	int i, epidx;
1739
1740	intf = umidi->iface;
1741	if (!intf)
1742		return -ENXIO;
1743	hostif = &intf->altsetting[0];
1744	intfd = get_iface_desc(hostif);
1745	ms_header = (struct usb_ms_header_descriptor*)hostif->extra;
1746	if (hostif->extralen >= 7 &&
1747	    ms_header->bLength >= 7 &&
1748	    ms_header->bDescriptorType == USB_DT_CS_INTERFACE &&
1749	    ms_header->bDescriptorSubtype == UAC_HEADER)
1750		dev_dbg(&umidi->dev->dev, "MIDIStreaming version %02x.%02x\n",
1751			    ms_header->bcdMSC[1], ms_header->bcdMSC[0]);
1752	else
1753		dev_warn(&umidi->dev->dev,
1754			 "MIDIStreaming interface descriptor not found\n");
1755
1756	epidx = 0;
1757	for (i = 0; i < intfd->bNumEndpoints; ++i) {
1758		hostep = &hostif->endpoint[i];
1759		ep = get_ep_desc(hostep);
1760		if (!usb_endpoint_xfer_bulk(ep) && !usb_endpoint_xfer_int(ep))
1761			continue;
1762		ms_ep = (struct usb_ms_endpoint_descriptor*)hostep->extra;
1763		if (hostep->extralen < 4 ||
1764		    ms_ep->bLength < 4 ||
1765		    ms_ep->bDescriptorType != USB_DT_CS_ENDPOINT ||
1766		    ms_ep->bDescriptorSubtype != UAC_MS_GENERAL)
1767			continue;
1768		if (usb_endpoint_dir_out(ep)) {
1769			if (endpoints[epidx].out_ep) {
1770				if (++epidx >= MIDI_MAX_ENDPOINTS) {
1771					dev_warn(&umidi->dev->dev,
1772						 "too many endpoints\n");
1773					break;
1774				}
1775			}
1776			endpoints[epidx].out_ep = usb_endpoint_num(ep);
1777			if (usb_endpoint_xfer_int(ep))
1778				endpoints[epidx].out_interval = ep->bInterval;
1779			else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1780				/*
1781				 * Low speed bulk transfers don't exist, so
1782				 * force interrupt transfers for devices like
1783				 * ESI MIDI Mate that try to use them anyway.
1784				 */
1785				endpoints[epidx].out_interval = 1;
1786			endpoints[epidx].out_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
1787			dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",
1788				    ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1789		} else {
1790			if (endpoints[epidx].in_ep) {
1791				if (++epidx >= MIDI_MAX_ENDPOINTS) {
1792					dev_warn(&umidi->dev->dev,
1793						 "too many endpoints\n");
1794					break;
1795				}
1796			}
1797			endpoints[epidx].in_ep = usb_endpoint_num(ep);
1798			if (usb_endpoint_xfer_int(ep))
1799				endpoints[epidx].in_interval = ep->bInterval;
1800			else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1801				endpoints[epidx].in_interval = 1;
1802			endpoints[epidx].in_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
1803			dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",
1804				    ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1805		}
1806	}
1807	return 0;
1808}
1809
1810static int roland_load_info(struct snd_kcontrol *kcontrol,
1811			    struct snd_ctl_elem_info *info)
1812{
1813	static const char *const names[] = { "High Load", "Light Load" };
1814
1815	return snd_ctl_enum_info(info, 1, 2, names);
1816}
1817
1818static int roland_load_get(struct snd_kcontrol *kcontrol,
1819			   struct snd_ctl_elem_value *value)
1820{
1821	value->value.enumerated.item[0] = kcontrol->private_value;
1822	return 0;
1823}
1824
1825static int roland_load_put(struct snd_kcontrol *kcontrol,
1826			   struct snd_ctl_elem_value *value)
1827{
1828	struct snd_usb_midi* umidi = kcontrol->private_data;
1829	int changed;
1830
1831	if (value->value.enumerated.item[0] > 1)
1832		return -EINVAL;
1833	mutex_lock(&umidi->mutex);
1834	changed = value->value.enumerated.item[0] != kcontrol->private_value;
1835	if (changed)
1836		kcontrol->private_value = value->value.enumerated.item[0];
1837	mutex_unlock(&umidi->mutex);
1838	return changed;
1839}
1840
1841static struct snd_kcontrol_new roland_load_ctl = {
1842	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1843	.name = "MIDI Input Mode",
1844	.info = roland_load_info,
1845	.get = roland_load_get,
1846	.put = roland_load_put,
1847	.private_value = 1,
1848};
1849
1850/*
1851 * On Roland devices, use the second alternate setting to be able to use
1852 * the interrupt input endpoint.
1853 */
1854static void snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi* umidi)
1855{
1856	struct usb_interface* intf;
1857	struct usb_host_interface *hostif;
1858	struct usb_interface_descriptor* intfd;
1859
1860	intf = umidi->iface;
1861	if (!intf || intf->num_altsetting != 2)
1862		return;
1863
1864	hostif = &intf->altsetting[1];
1865	intfd = get_iface_desc(hostif);
1866	if (intfd->bNumEndpoints != 2 ||
1867	    (get_endpoint(hostif, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK ||
1868	    (get_endpoint(hostif, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
1869		return;
1870
1871	dev_dbg(&umidi->dev->dev, "switching to altsetting %d with int ep\n",
1872		    intfd->bAlternateSetting);
1873	usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
1874			  intfd->bAlternateSetting);
1875
1876	umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi);
1877	if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0)
1878		umidi->roland_load_ctl = NULL;
1879}
1880
1881/*
1882 * Try to find any usable endpoints in the interface.
1883 */
1884static int snd_usbmidi_detect_endpoints(struct snd_usb_midi* umidi,
1885					struct snd_usb_midi_endpoint_info* endpoint,
1886					int max_endpoints)
1887{
1888	struct usb_interface* intf;
1889	struct usb_host_interface *hostif;
1890	struct usb_interface_descriptor* intfd;
1891	struct usb_endpoint_descriptor* epd;
1892	int i, out_eps = 0, in_eps = 0;
1893
1894	if (USB_ID_VENDOR(umidi->usb_id) == 0x0582)
1895		snd_usbmidi_switch_roland_altsetting(umidi);
1896
1897	if (endpoint[0].out_ep || endpoint[0].in_ep)
1898		return 0;
1899
1900	intf = umidi->iface;
1901	if (!intf || intf->num_altsetting < 1)
1902		return -ENOENT;
1903	hostif = intf->cur_altsetting;
1904	intfd = get_iface_desc(hostif);
1905
1906	for (i = 0; i < intfd->bNumEndpoints; ++i) {
1907		epd = get_endpoint(hostif, i);
1908		if (!usb_endpoint_xfer_bulk(epd) &&
1909		    !usb_endpoint_xfer_int(epd))
1910			continue;
1911		if (out_eps < max_endpoints &&
1912		    usb_endpoint_dir_out(epd)) {
1913			endpoint[out_eps].out_ep = usb_endpoint_num(epd);
1914			if (usb_endpoint_xfer_int(epd))
1915				endpoint[out_eps].out_interval = epd->bInterval;
1916			++out_eps;
1917		}
1918		if (in_eps < max_endpoints &&
1919		    usb_endpoint_dir_in(epd)) {
1920			endpoint[in_eps].in_ep = usb_endpoint_num(epd);
1921			if (usb_endpoint_xfer_int(epd))
1922				endpoint[in_eps].in_interval = epd->bInterval;
1923			++in_eps;
1924		}
1925	}
1926	return (out_eps || in_eps) ? 0 : -ENOENT;
1927}
1928
1929/*
1930 * Detects the endpoints for one-port-per-endpoint protocols.
1931 */
1932static int snd_usbmidi_detect_per_port_endpoints(struct snd_usb_midi* umidi,
1933						 struct snd_usb_midi_endpoint_info* endpoints)
1934{
1935	int err, i;
1936
1937	err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS);
1938	for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1939		if (endpoints[i].out_ep)
1940			endpoints[i].out_cables = 0x0001;
1941		if (endpoints[i].in_ep)
1942			endpoints[i].in_cables = 0x0001;
1943	}
1944	return err;
1945}
1946
1947/*
1948 * Detects the endpoints and ports of Yamaha devices.
1949 */
1950static int snd_usbmidi_detect_yamaha(struct snd_usb_midi* umidi,
1951				     struct snd_usb_midi_endpoint_info* endpoint)
1952{
1953	struct usb_interface* intf;
1954	struct usb_host_interface *hostif;
1955	struct usb_interface_descriptor* intfd;
1956	uint8_t* cs_desc;
1957
1958	intf = umidi->iface;
1959	if (!intf)
1960		return -ENOENT;
1961	hostif = intf->altsetting;
1962	intfd = get_iface_desc(hostif);
1963	if (intfd->bNumEndpoints < 1)
1964		return -ENOENT;
1965
1966	/*
1967	 * For each port there is one MIDI_IN/OUT_JACK descriptor, not
1968	 * necessarily with any useful contents.  So simply count 'em.
1969	 */
1970	for (cs_desc = hostif->extra;
1971	     cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
1972	     cs_desc += cs_desc[0]) {
1973		if (cs_desc[1] == USB_DT_CS_INTERFACE) {
1974			if (cs_desc[2] == UAC_MIDI_IN_JACK)
1975				endpoint->in_cables = (endpoint->in_cables << 1) | 1;
1976			else if (cs_desc[2] == UAC_MIDI_OUT_JACK)
1977				endpoint->out_cables = (endpoint->out_cables << 1) | 1;
1978		}
1979	}
1980	if (!endpoint->in_cables && !endpoint->out_cables)
1981		return -ENOENT;
1982
1983	return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
1984}
1985
1986/*
1987 * Detects the endpoints and ports of Roland devices.
1988 */
1989static int snd_usbmidi_detect_roland(struct snd_usb_midi* umidi,
1990				     struct snd_usb_midi_endpoint_info* endpoint)
1991{
1992	struct usb_interface* intf;
1993	struct usb_host_interface *hostif;
1994	u8* cs_desc;
1995
1996	intf = umidi->iface;
1997	if (!intf)
1998		return -ENOENT;
1999	hostif = intf->altsetting;
2000	/*
2001	 * Some devices have a descriptor <06 24 F1 02 <inputs> <outputs>>,
2002	 * some have standard class descriptors, or both kinds, or neither.
2003	 */
2004	for (cs_desc = hostif->extra;
2005	     cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
2006	     cs_desc += cs_desc[0]) {
2007		if (cs_desc[0] >= 6 &&
2008		    cs_desc[1] == USB_DT_CS_INTERFACE &&
2009		    cs_desc[2] == 0xf1 &&
2010		    cs_desc[3] == 0x02) {
2011			endpoint->in_cables  = (1 << cs_desc[4]) - 1;
2012			endpoint->out_cables = (1 << cs_desc[5]) - 1;
2013			return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
2014		} else if (cs_desc[0] >= 7 &&
2015			   cs_desc[1] == USB_DT_CS_INTERFACE &&
2016			   cs_desc[2] == UAC_HEADER) {
2017			return snd_usbmidi_get_ms_info(umidi, endpoint);
2018		}
2019	}
2020
2021	return -ENODEV;
2022}
2023
2024/*
2025 * Creates the endpoints and their ports for Midiman devices.
2026 */
2027static int snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi* umidi,
2028						struct snd_usb_midi_endpoint_info* endpoint)
2029{
2030	struct snd_usb_midi_endpoint_info ep_info;
2031	struct usb_interface* intf;
2032	struct usb_host_interface *hostif;
2033	struct usb_interface_descriptor* intfd;
2034	struct usb_endpoint_descriptor* epd;
2035	int cable, err;
2036
2037	intf = umidi->iface;
2038	if (!intf)
2039		return -ENOENT;
2040	hostif = intf->altsetting;
2041	intfd = get_iface_desc(hostif);
2042	/*
2043	 * The various MidiSport devices have more or less random endpoint
2044	 * numbers, so we have to identify the endpoints by their index in
2045	 * the descriptor array, like the driver for that other OS does.
2046	 *
2047	 * There is one interrupt input endpoint for all input ports, one
2048	 * bulk output endpoint for even-numbered ports, and one for odd-
2049	 * numbered ports.  Both bulk output endpoints have corresponding
2050	 * input bulk endpoints (at indices 1 and 3) which aren't used.
2051	 */
2052	if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) {
2053		dev_dbg(&umidi->dev->dev, "not enough endpoints\n");
2054		return -ENOENT;
2055	}
2056
2057	epd = get_endpoint(hostif, 0);
2058	if (!usb_endpoint_dir_in(epd) || !usb_endpoint_xfer_int(epd)) {
2059		dev_dbg(&umidi->dev->dev, "endpoint[0] isn't interrupt\n");
2060		return -ENXIO;
2061	}
2062	epd = get_endpoint(hostif, 2);
2063	if (!usb_endpoint_dir_out(epd) || !usb_endpoint_xfer_bulk(epd)) {
2064		dev_dbg(&umidi->dev->dev, "endpoint[2] isn't bulk output\n");
2065		return -ENXIO;
2066	}
2067	if (endpoint->out_cables > 0x0001) {
2068		epd = get_endpoint(hostif, 4);
2069		if (!usb_endpoint_dir_out(epd) ||
2070		    !usb_endpoint_xfer_bulk(epd)) {
2071			dev_dbg(&umidi->dev->dev, "endpoint[4] isn't bulk output\n");
2072			return -ENXIO;
2073		}
2074	}
2075
2076	ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
2077	ep_info.out_interval = 0;
2078	ep_info.out_cables = endpoint->out_cables & 0x5555;
2079	err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
2080	if (err < 0)
2081		return err;
2082
2083	ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
2084	ep_info.in_interval = get_endpoint(hostif, 0)->bInterval;
2085	ep_info.in_cables = endpoint->in_cables;
2086	err = snd_usbmidi_in_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
2087	if (err < 0)
2088		return err;
2089
2090	if (endpoint->out_cables > 0x0001) {
2091		ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
2092		ep_info.out_cables = endpoint->out_cables & 0xaaaa;
2093		err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[1]);
2094		if (err < 0)
2095			return err;
2096	}
2097
2098	for (cable = 0; cable < 0x10; ++cable) {
2099		if (endpoint->out_cables & (1 << cable))
2100			snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, cable,
2101						   &umidi->endpoints[cable & 1].out->ports[cable].substream);
2102		if (endpoint->in_cables & (1 << cable))
2103			snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, cable,
2104						   &umidi->endpoints[0].in->ports[cable].substream);
2105	}
2106	return 0;
2107}
2108
2109static struct snd_rawmidi_global_ops snd_usbmidi_ops = {
2110	.get_port_info = snd_usbmidi_get_port_info,
2111};
2112
2113static int snd_usbmidi_create_rawmidi(struct snd_usb_midi* umidi,
2114				      int out_ports, int in_ports)
2115{
2116	struct snd_rawmidi *rmidi;
2117	int err;
2118
2119	err = snd_rawmidi_new(umidi->card, "USB MIDI",
2120			      umidi->next_midi_device++,
2121			      out_ports, in_ports, &rmidi);
2122	if (err < 0)
2123		return err;
2124	strcpy(rmidi->name, umidi->card->shortname);
2125	rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
2126			    SNDRV_RAWMIDI_INFO_INPUT |
2127			    SNDRV_RAWMIDI_INFO_DUPLEX;
2128	rmidi->ops = &snd_usbmidi_ops;
2129	rmidi->private_data = umidi;
2130	rmidi->private_free = snd_usbmidi_rawmidi_free;
2131	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_usbmidi_output_ops);
2132	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_usbmidi_input_ops);
2133
2134	umidi->rmidi = rmidi;
2135	return 0;
2136}
2137
2138/*
2139 * Temporarily stop input.
2140 */
2141void snd_usbmidi_input_stop(struct list_head* p)
2142{
2143	struct snd_usb_midi* umidi;
2144	unsigned int i, j;
2145
2146	umidi = list_entry(p, struct snd_usb_midi, list);
2147	if (!umidi->input_running)
2148		return;
2149	for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2150		struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
2151		if (ep->in)
2152			for (j = 0; j < INPUT_URBS; ++j)
2153				usb_kill_urb(ep->in->urbs[j]);
2154	}
2155	umidi->input_running = 0;
2156}
2157EXPORT_SYMBOL(snd_usbmidi_input_stop);
2158
2159static void snd_usbmidi_input_start_ep(struct snd_usb_midi_in_endpoint* ep)
2160{
2161	unsigned int i;
2162
2163	if (!ep)
2164		return;
2165	for (i = 0; i < INPUT_URBS; ++i) {
2166		struct urb* urb = ep->urbs[i];
2167		urb->dev = ep->umidi->dev;
2168		snd_usbmidi_submit_urb(urb, GFP_KERNEL);
2169	}
2170}
2171
2172/*
2173 * Resume input after a call to snd_usbmidi_input_stop().
2174 */
2175void snd_usbmidi_input_start(struct list_head* p)
2176{
2177	struct snd_usb_midi* umidi;
2178	int i;
2179
2180	umidi = list_entry(p, struct snd_usb_midi, list);
2181	if (umidi->input_running || !umidi->opened[1])
2182		return;
2183	for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
2184		snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
2185	umidi->input_running = 1;
2186}
2187EXPORT_SYMBOL(snd_usbmidi_input_start);
2188
2189/*
2190 * Creates and registers everything needed for a MIDI streaming interface.
2191 */
2192int snd_usbmidi_create(struct snd_card *card,
2193		       struct usb_interface* iface,
2194		       struct list_head *midi_list,
2195		       const struct snd_usb_audio_quirk* quirk)
2196{
2197	struct snd_usb_midi* umidi;
2198	struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS];
2199	int out_ports, in_ports;
2200	int i, err;
2201
2202	umidi = kzalloc(sizeof(*umidi), GFP_KERNEL);
2203	if (!umidi)
2204		return -ENOMEM;
2205	umidi->dev = interface_to_usbdev(iface);
2206	umidi->card = card;
2207	umidi->iface = iface;
2208	umidi->quirk = quirk;
2209	umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
2210	init_timer(&umidi->error_timer);
2211	spin_lock_init(&umidi->disc_lock);
2212	init_rwsem(&umidi->disc_rwsem);
2213	mutex_init(&umidi->mutex);
2214	umidi->usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor),
2215			       le16_to_cpu(umidi->dev->descriptor.idProduct));
2216	umidi->error_timer.function = snd_usbmidi_error_timer;
2217	umidi->error_timer.data = (unsigned long)umidi;
2218
2219	/* detect the endpoint(s) to use */
2220	memset(endpoints, 0, sizeof(endpoints));
2221	switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) {
2222	case QUIRK_MIDI_STANDARD_INTERFACE:
2223		err = snd_usbmidi_get_ms_info(umidi, endpoints);
2224		if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */
2225			umidi->usb_protocol_ops =
2226				&snd_usbmidi_maudio_broken_running_status_ops;
2227		break;
2228	case QUIRK_MIDI_US122L:
2229		umidi->usb_protocol_ops = &snd_usbmidi_122l_ops;
2230		/* fall through */
2231	case QUIRK_MIDI_FIXED_ENDPOINT:
2232		memcpy(&endpoints[0], quirk->data,
2233		       sizeof(struct snd_usb_midi_endpoint_info));
2234		err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2235		break;
2236	case QUIRK_MIDI_YAMAHA:
2237		err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]);
2238		break;
2239	case QUIRK_MIDI_ROLAND:
2240		err = snd_usbmidi_detect_roland(umidi, &endpoints[0]);
2241		break;
2242	case QUIRK_MIDI_MIDIMAN:
2243		umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
2244		memcpy(&endpoints[0], quirk->data,
2245		       sizeof(struct snd_usb_midi_endpoint_info));
2246		err = 0;
2247		break;
2248	case QUIRK_MIDI_NOVATION:
2249		umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
2250		err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2251		break;
2252	case QUIRK_MIDI_RAW_BYTES:
2253		umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;
2254		/*
2255		 * Interface 1 contains isochronous endpoints, but with the same
2256		 * numbers as in interface 0.  Since it is interface 1 that the
2257		 * USB core has most recently seen, these descriptors are now
2258		 * associated with the endpoint numbers.  This will foul up our
2259		 * attempts to submit bulk/interrupt URBs to the endpoints in
2260		 * interface 0, so we have to make sure that the USB core looks
2261		 * again at interface 0 by calling usb_set_interface() on it.
2262		 */
2263		if (umidi->usb_id == USB_ID(0x07fd, 0x0001)) /* MOTU Fastlane */
2264			usb_set_interface(umidi->dev, 0, 0);
2265		err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2266		break;
2267	case QUIRK_MIDI_EMAGIC:
2268		umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops;
2269		memcpy(&endpoints[0], quirk->data,
2270		       sizeof(struct snd_usb_midi_endpoint_info));
2271		err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2272		break;
2273	case QUIRK_MIDI_CME:
2274		umidi->usb_protocol_ops = &snd_usbmidi_cme_ops;
2275		err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2276		break;
2277	case QUIRK_MIDI_AKAI:
2278		umidi->usb_protocol_ops = &snd_usbmidi_akai_ops;
2279		err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2280		/* endpoint 1 is input-only */
2281		endpoints[1].out_cables = 0;
2282		break;
2283	case QUIRK_MIDI_FTDI:
2284		umidi->usb_protocol_ops = &snd_usbmidi_ftdi_ops;
2285
2286		/* set baud rate to 31250 (48 MHz / 16 / 96) */
2287		err = usb_control_msg(umidi->dev, usb_sndctrlpipe(umidi->dev, 0),
2288				      3, 0x40, 0x60, 0, NULL, 0, 1000);
2289		if (err < 0)
2290			break;
2291
2292		err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2293		break;
2294	default:
2295		dev_err(&umidi->dev->dev, "invalid quirk type %d\n", quirk->type);
2296		err = -ENXIO;
2297		break;
2298	}
2299	if (err < 0) {
2300		kfree(umidi);
2301		return err;
2302	}
2303
2304	/* create rawmidi device */
2305	out_ports = 0;
2306	in_ports = 0;
2307	for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2308		out_ports += hweight16(endpoints[i].out_cables);
2309		in_ports += hweight16(endpoints[i].in_cables);
2310	}
2311	err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports);
2312	if (err < 0) {
2313		kfree(umidi);
2314		return err;
2315	}
2316
2317	/* create endpoint/port structures */
2318	if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN)
2319		err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]);
2320	else
2321		err = snd_usbmidi_create_endpoints(umidi, endpoints);
2322	if (err < 0) {
2323		snd_usbmidi_free(umidi);
2324		return err;
2325	}
2326
2327	usb_autopm_get_interface_no_resume(umidi->iface);
2328
2329	list_add_tail(&umidi->list, midi_list);
 
 
 
2330	return 0;
2331}
 
2332EXPORT_SYMBOL(snd_usbmidi_create);