2 * usbmidi.c - ALSA USB MIDI driver
4 * Copyright (c) 2002-2005 Clemens Ladisch
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
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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.
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
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
38 #include <sound/driver.h>
39 #include <linux/kernel.h>
40 #include <linux/types.h>
41 #include <linux/bitops.h>
42 #include <linux/interrupt.h>
43 #include <linux/spinlock.h>
44 #include <linux/string.h>
45 #include <linux/init.h>
46 #include <linux/slab.h>
47 #include <linux/usb.h>
48 #include <sound/core.h>
49 #include <sound/minors.h>
50 #include <sound/rawmidi.h>
55 * define this to log all USB packets
57 /* #define DUMP_PACKETS */
60 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
61 MODULE_DESCRIPTION("USB Audio/MIDI helper module");
62 MODULE_LICENSE("Dual BSD/GPL");
65 struct usb_ms_header_descriptor {
68 __u8 bDescriptorSubtype;
71 } __attribute__ ((packed));
73 struct usb_ms_endpoint_descriptor {
76 __u8 bDescriptorSubtype;
78 __u8 baAssocJackID[0];
79 } __attribute__ ((packed));
81 typedef struct snd_usb_midi snd_usb_midi_t;
82 typedef struct snd_usb_midi_endpoint snd_usb_midi_endpoint_t;
83 typedef struct snd_usb_midi_out_endpoint snd_usb_midi_out_endpoint_t;
84 typedef struct snd_usb_midi_in_endpoint snd_usb_midi_in_endpoint_t;
85 typedef struct usbmidi_out_port usbmidi_out_port_t;
86 typedef struct usbmidi_in_port usbmidi_in_port_t;
88 struct usb_protocol_ops {
89 void (*input)(snd_usb_midi_in_endpoint_t*, uint8_t*, int);
90 void (*output)(snd_usb_midi_out_endpoint_t*);
91 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t);
92 void (*init_out_endpoint)(snd_usb_midi_out_endpoint_t*);
93 void (*finish_out_endpoint)(snd_usb_midi_out_endpoint_t*);
97 snd_usb_audio_t *chip;
98 struct usb_interface *iface;
99 const snd_usb_audio_quirk_t *quirk;
100 snd_rawmidi_t* rmidi;
101 struct usb_protocol_ops* usb_protocol_ops;
102 struct list_head list;
104 struct snd_usb_midi_endpoint {
105 snd_usb_midi_out_endpoint_t *out;
106 snd_usb_midi_in_endpoint_t *in;
107 } endpoints[MIDI_MAX_ENDPOINTS];
108 unsigned long input_triggered;
111 struct snd_usb_midi_out_endpoint {
112 snd_usb_midi_t* umidi;
115 int max_transfer; /* size of urb buffer */
116 struct tasklet_struct tasklet;
118 spinlock_t buffer_lock;
120 struct usbmidi_out_port {
121 snd_usb_midi_out_endpoint_t* ep;
122 snd_rawmidi_substream_t* substream;
124 uint8_t cable; /* cable number << 4 */
126 #define STATE_UNKNOWN 0
127 #define STATE_1PARAM 1
128 #define STATE_2PARAM_1 2
129 #define STATE_2PARAM_2 3
130 #define STATE_SYSEX_0 4
131 #define STATE_SYSEX_1 5
132 #define STATE_SYSEX_2 6
138 struct snd_usb_midi_in_endpoint {
139 snd_usb_midi_t* umidi;
141 struct usbmidi_in_port {
142 snd_rawmidi_substream_t* substream;
148 static void snd_usbmidi_do_output(snd_usb_midi_out_endpoint_t* ep);
150 static const uint8_t snd_usbmidi_cin_length[] = {
151 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
155 * Submits the URB, with error handling.
157 static int snd_usbmidi_submit_urb(struct urb* urb, int flags)
159 int err = usb_submit_urb(urb, flags);
160 if (err < 0 && err != -ENODEV)
161 snd_printk(KERN_ERR "usb_submit_urb: %d\n", err);
166 * Error handling for URB completion functions.
168 static int snd_usbmidi_urb_error(int status)
170 if (status == -ENOENT)
171 return status; /* killed */
172 if (status == -EILSEQ ||
173 status == -ECONNRESET ||
174 status == -ETIMEDOUT)
175 return -ENODEV; /* device removed/shutdown */
176 snd_printk(KERN_ERR "urb status %d\n", status);
177 return 0; /* continue */
181 * Receives a chunk of MIDI data.
183 static void snd_usbmidi_input_data(snd_usb_midi_in_endpoint_t* ep, int portidx,
184 uint8_t* data, int length)
186 usbmidi_in_port_t* port = &ep->ports[portidx];
188 if (!port->substream) {
189 snd_printd("unexpected port %d!\n", portidx);
192 if (!test_bit(port->substream->number, &ep->umidi->input_triggered))
194 snd_rawmidi_receive(port->substream, data, length);
198 static void dump_urb(const char *type, const u8 *data, int length)
200 snd_printk(KERN_DEBUG "%s packet: [", type);
201 for (; length > 0; ++data, --length)
202 printk(" %02x", *data);
206 #define dump_urb(type, data, length) /* nothing */
210 * Processes the data read from the device.
212 static void snd_usbmidi_in_urb_complete(struct urb* urb, struct pt_regs *regs)
214 snd_usb_midi_in_endpoint_t* ep = urb->context;
216 if (urb->status == 0) {
217 dump_urb("received", urb->transfer_buffer, urb->actual_length);
218 ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer,
221 if (snd_usbmidi_urb_error(urb->status) < 0)
225 if (usb_pipe_needs_resubmit(urb->pipe)) {
226 urb->dev = ep->umidi->chip->dev;
227 snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
231 static void snd_usbmidi_out_urb_complete(struct urb* urb, struct pt_regs *regs)
233 snd_usb_midi_out_endpoint_t* ep = urb->context;
235 spin_lock(&ep->buffer_lock);
237 spin_unlock(&ep->buffer_lock);
238 if (urb->status < 0) {
239 if (snd_usbmidi_urb_error(urb->status) < 0)
242 snd_usbmidi_do_output(ep);
246 * This is called when some data should be transferred to the device
247 * (from one or more substreams).
249 static void snd_usbmidi_do_output(snd_usb_midi_out_endpoint_t* ep)
251 struct urb* urb = ep->urb;
254 spin_lock_irqsave(&ep->buffer_lock, flags);
255 if (ep->urb_active || ep->umidi->chip->shutdown) {
256 spin_unlock_irqrestore(&ep->buffer_lock, flags);
260 urb->transfer_buffer_length = 0;
261 ep->umidi->usb_protocol_ops->output(ep);
263 if (urb->transfer_buffer_length > 0) {
264 dump_urb("sending", urb->transfer_buffer,
265 urb->transfer_buffer_length);
266 urb->dev = ep->umidi->chip->dev;
267 ep->urb_active = snd_usbmidi_submit_urb(urb, GFP_ATOMIC) >= 0;
269 spin_unlock_irqrestore(&ep->buffer_lock, flags);
272 static void snd_usbmidi_out_tasklet(unsigned long data)
274 snd_usb_midi_out_endpoint_t* ep = (snd_usb_midi_out_endpoint_t *) data;
276 snd_usbmidi_do_output(ep);
279 /* helper function to send static data that may not DMA-able */
280 static int send_bulk_static_data(snd_usb_midi_out_endpoint_t* ep,
281 const void *data, int len)
284 void *buf = kmalloc(len, GFP_KERNEL);
287 memcpy(buf, data, len);
288 dump_urb("sending", buf, len);
289 err = usb_bulk_msg(ep->umidi->chip->dev, ep->urb->pipe, buf, len,
296 * Standard USB MIDI protocol: see the spec.
297 * Midiman protocol: like the standard protocol, but the control byte is the
298 * fourth byte in each packet, and uses length instead of CIN.
301 static void snd_usbmidi_standard_input(snd_usb_midi_in_endpoint_t* ep,
302 uint8_t* buffer, int buffer_length)
306 for (i = 0; i + 3 < buffer_length; i += 4)
307 if (buffer[i] != 0) {
308 int cable = buffer[i] >> 4;
309 int length = snd_usbmidi_cin_length[buffer[i] & 0x0f];
310 snd_usbmidi_input_data(ep, cable, &buffer[i + 1], length);
314 static void snd_usbmidi_midiman_input(snd_usb_midi_in_endpoint_t* ep,
315 uint8_t* buffer, int buffer_length)
319 for (i = 0; i + 3 < buffer_length; i += 4)
320 if (buffer[i + 3] != 0) {
321 int port = buffer[i + 3] >> 4;
322 int length = buffer[i + 3] & 3;
323 snd_usbmidi_input_data(ep, port, &buffer[i], length);
328 * Adds one USB MIDI packet to the output buffer.
330 static void snd_usbmidi_output_standard_packet(struct urb* urb, uint8_t p0,
331 uint8_t p1, uint8_t p2, uint8_t p3)
334 uint8_t* buf = (uint8_t*)urb->transfer_buffer + urb->transfer_buffer_length;
339 urb->transfer_buffer_length += 4;
343 * Adds one Midiman packet to the output buffer.
345 static void snd_usbmidi_output_midiman_packet(struct urb* urb, uint8_t p0,
346 uint8_t p1, uint8_t p2, uint8_t p3)
349 uint8_t* buf = (uint8_t*)urb->transfer_buffer + urb->transfer_buffer_length;
353 buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f];
354 urb->transfer_buffer_length += 4;
358 * Converts MIDI commands to USB MIDI packets.
360 static void snd_usbmidi_transmit_byte(usbmidi_out_port_t* port,
361 uint8_t b, struct urb* urb)
363 uint8_t p0 = port->cable;
364 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) =
365 port->ep->umidi->usb_protocol_ops->output_packet;
368 output_packet(urb, p0 | 0x0f, b, 0, 0);
369 } else if (b >= 0xf0) {
373 port->state = STATE_SYSEX_1;
378 port->state = STATE_1PARAM;
382 port->state = STATE_2PARAM_1;
386 port->state = STATE_UNKNOWN;
389 output_packet(urb, p0 | 0x05, 0xf6, 0, 0);
390 port->state = STATE_UNKNOWN;
393 switch (port->state) {
395 output_packet(urb, p0 | 0x05, 0xf7, 0, 0);
398 output_packet(urb, p0 | 0x06, port->data[0], 0xf7, 0);
401 output_packet(urb, p0 | 0x07, port->data[0], port->data[1], 0xf7);
404 port->state = STATE_UNKNOWN;
407 } else if (b >= 0x80) {
409 if (b >= 0xc0 && b <= 0xdf)
410 port->state = STATE_1PARAM;
412 port->state = STATE_2PARAM_1;
413 } else { /* b < 0x80 */
414 switch (port->state) {
416 if (port->data[0] < 0xf0) {
417 p0 |= port->data[0] >> 4;
420 port->state = STATE_UNKNOWN;
422 output_packet(urb, p0, port->data[0], b, 0);
426 port->state = STATE_2PARAM_2;
429 if (port->data[0] < 0xf0) {
430 p0 |= port->data[0] >> 4;
431 port->state = STATE_2PARAM_1;
434 port->state = STATE_UNKNOWN;
436 output_packet(urb, p0, port->data[0], port->data[1], b);
440 port->state = STATE_SYSEX_1;
444 port->state = STATE_SYSEX_2;
447 output_packet(urb, p0 | 0x04, port->data[0], port->data[1], b);
448 port->state = STATE_SYSEX_0;
454 static void snd_usbmidi_standard_output(snd_usb_midi_out_endpoint_t* ep)
456 struct urb* urb = ep->urb;
459 /* FIXME: lower-numbered ports can starve higher-numbered ports */
460 for (p = 0; p < 0x10; ++p) {
461 usbmidi_out_port_t* port = &ep->ports[p];
464 while (urb->transfer_buffer_length + 3 < ep->max_transfer) {
466 if (snd_rawmidi_transmit(port->substream, &b, 1) != 1) {
470 snd_usbmidi_transmit_byte(port, b, urb);
475 static struct usb_protocol_ops snd_usbmidi_standard_ops = {
476 .input = snd_usbmidi_standard_input,
477 .output = snd_usbmidi_standard_output,
478 .output_packet = snd_usbmidi_output_standard_packet,
481 static struct usb_protocol_ops snd_usbmidi_midiman_ops = {
482 .input = snd_usbmidi_midiman_input,
483 .output = snd_usbmidi_standard_output,
484 .output_packet = snd_usbmidi_output_midiman_packet,
488 * Novation USB MIDI protocol: number of data bytes is in the first byte
489 * (when receiving) (+1!) or in the second byte (when sending); data begins
493 static void snd_usbmidi_novation_input(snd_usb_midi_in_endpoint_t* ep,
494 uint8_t* buffer, int buffer_length)
496 if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1)
498 snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1);
501 static void snd_usbmidi_novation_output(snd_usb_midi_out_endpoint_t* ep)
503 uint8_t* transfer_buffer;
506 if (!ep->ports[0].active)
508 transfer_buffer = ep->urb->transfer_buffer;
509 count = snd_rawmidi_transmit(ep->ports[0].substream,
511 ep->max_transfer - 2);
513 ep->ports[0].active = 0;
516 transfer_buffer[0] = 0;
517 transfer_buffer[1] = count;
518 ep->urb->transfer_buffer_length = 2 + count;
521 static struct usb_protocol_ops snd_usbmidi_novation_ops = {
522 .input = snd_usbmidi_novation_input,
523 .output = snd_usbmidi_novation_output,
527 * Mark of the Unicorn USB MIDI protocol: raw MIDI.
530 static void snd_usbmidi_motu_input(snd_usb_midi_in_endpoint_t* ep,
531 uint8_t* buffer, int buffer_length)
533 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
536 static void snd_usbmidi_motu_output(snd_usb_midi_out_endpoint_t* ep)
540 if (!ep->ports[0].active)
542 count = snd_rawmidi_transmit(ep->ports[0].substream,
543 ep->urb->transfer_buffer,
546 ep->ports[0].active = 0;
549 ep->urb->transfer_buffer_length = count;
552 static struct usb_protocol_ops snd_usbmidi_motu_ops = {
553 .input = snd_usbmidi_motu_input,
554 .output = snd_usbmidi_motu_output,
558 * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching.
561 static void snd_usbmidi_emagic_init_out(snd_usb_midi_out_endpoint_t* ep)
563 static const u8 init_data[] = {
564 /* initialization magic: "get version" */
566 0x00, 0x20, 0x31, /* Emagic */
568 0x0b, /* version number request */
569 0x00, /* command version */
570 0x00, /* EEPROM, box 0 */
573 send_bulk_static_data(ep, init_data, sizeof(init_data));
574 /* while we're at it, pour on more magic */
575 send_bulk_static_data(ep, init_data, sizeof(init_data));
578 static void snd_usbmidi_emagic_finish_out(snd_usb_midi_out_endpoint_t* ep)
580 static const u8 finish_data[] = {
581 /* switch to patch mode with last preset */
583 0x00, 0x20, 0x31, /* Emagic */
585 0x10, /* patch switch command */
586 0x00, /* command version */
587 0x7f, /* to all boxes */
588 0x40, /* last preset in EEPROM */
591 send_bulk_static_data(ep, finish_data, sizeof(finish_data));
594 static void snd_usbmidi_emagic_input(snd_usb_midi_in_endpoint_t* ep,
595 uint8_t* buffer, int buffer_length)
597 /* ignore padding bytes at end of buffer */
598 while (buffer_length > 0 && buffer[buffer_length - 1] == 0xff)
601 /* handle F5 at end of last buffer */
605 while (buffer_length > 0) {
608 /* determine size of data until next F5 */
609 for (i = 0; i < buffer_length; ++i)
610 if (buffer[i] == 0xf5)
612 snd_usbmidi_input_data(ep, ep->current_port, buffer, i);
616 if (buffer_length <= 0)
618 /* assert(buffer[0] == 0xf5); */
624 if (buffer_length <= 0)
626 if (buffer[0] < 0x80) {
627 ep->current_port = (buffer[0] - 1) & 15;
635 static void snd_usbmidi_emagic_output(snd_usb_midi_out_endpoint_t* ep)
637 int port0 = ep->current_port;
638 uint8_t* buf = ep->urb->transfer_buffer;
639 int buf_free = ep->max_transfer;
642 for (i = 0; i < 0x10; ++i) {
643 /* round-robin, starting at the last current port */
644 int portnum = (port0 + i) & 15;
645 usbmidi_out_port_t* port = &ep->ports[portnum];
649 if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) {
654 if (portnum != ep->current_port) {
657 ep->current_port = portnum;
659 buf[1] = (portnum + 1) & 15;
666 length = snd_rawmidi_transmit(port->substream, buf, buf_free);
674 ep->urb->transfer_buffer_length = ep->max_transfer - buf_free;
677 static struct usb_protocol_ops snd_usbmidi_emagic_ops = {
678 .input = snd_usbmidi_emagic_input,
679 .output = snd_usbmidi_emagic_output,
680 .init_out_endpoint = snd_usbmidi_emagic_init_out,
681 .finish_out_endpoint = snd_usbmidi_emagic_finish_out,
685 static int snd_usbmidi_output_open(snd_rawmidi_substream_t* substream)
687 snd_usb_midi_t* umidi = substream->rmidi->private_data;
688 usbmidi_out_port_t* port = NULL;
691 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
692 if (umidi->endpoints[i].out)
693 for (j = 0; j < 0x10; ++j)
694 if (umidi->endpoints[i].out->ports[j].substream == substream) {
695 port = &umidi->endpoints[i].out->ports[j];
702 substream->runtime->private_data = port;
703 port->state = STATE_UNKNOWN;
707 static int snd_usbmidi_output_close(snd_rawmidi_substream_t* substream)
712 static void snd_usbmidi_output_trigger(snd_rawmidi_substream_t* substream, int up)
714 usbmidi_out_port_t* port = (usbmidi_out_port_t*)substream->runtime->private_data;
718 if (port->ep->umidi->chip->shutdown) {
719 /* gobble up remaining bytes to prevent wait in
720 * snd_rawmidi_drain_output */
721 while (!snd_rawmidi_transmit_empty(substream))
722 snd_rawmidi_transmit_ack(substream, 1);
725 tasklet_hi_schedule(&port->ep->tasklet);
729 static int snd_usbmidi_input_open(snd_rawmidi_substream_t* substream)
734 static int snd_usbmidi_input_close(snd_rawmidi_substream_t* substream)
739 static void snd_usbmidi_input_trigger(snd_rawmidi_substream_t* substream, int up)
741 snd_usb_midi_t* umidi = substream->rmidi->private_data;
744 set_bit(substream->number, &umidi->input_triggered);
746 clear_bit(substream->number, &umidi->input_triggered);
749 static snd_rawmidi_ops_t snd_usbmidi_output_ops = {
750 .open = snd_usbmidi_output_open,
751 .close = snd_usbmidi_output_close,
752 .trigger = snd_usbmidi_output_trigger,
755 static snd_rawmidi_ops_t snd_usbmidi_input_ops = {
756 .open = snd_usbmidi_input_open,
757 .close = snd_usbmidi_input_close,
758 .trigger = snd_usbmidi_input_trigger
762 * Frees an input endpoint.
763 * May be called when ep hasn't been initialized completely.
765 static void snd_usbmidi_in_endpoint_delete(snd_usb_midi_in_endpoint_t* ep)
768 kfree(ep->urb->transfer_buffer);
769 usb_free_urb(ep->urb);
775 * Creates an input endpoint.
777 static int snd_usbmidi_in_endpoint_create(snd_usb_midi_t* umidi,
778 snd_usb_midi_endpoint_info_t* ep_info,
779 snd_usb_midi_endpoint_t* rep)
781 snd_usb_midi_in_endpoint_t* ep;
787 ep = kcalloc(1, sizeof(*ep), GFP_KERNEL);
792 ep->urb = usb_alloc_urb(0, GFP_KERNEL);
794 snd_usbmidi_in_endpoint_delete(ep);
797 if (ep_info->in_interval)
798 pipe = usb_rcvintpipe(umidi->chip->dev, ep_info->in_ep);
800 pipe = usb_rcvbulkpipe(umidi->chip->dev, ep_info->in_ep);
801 length = usb_maxpacket(umidi->chip->dev, pipe, 0);
802 buffer = kmalloc(length, GFP_KERNEL);
804 snd_usbmidi_in_endpoint_delete(ep);
807 if (ep_info->in_interval)
808 usb_fill_int_urb(ep->urb, umidi->chip->dev, pipe, buffer, length,
809 snd_usb_complete_callback(snd_usbmidi_in_urb_complete),
810 ep, ep_info->in_interval);
812 usb_fill_bulk_urb(ep->urb, umidi->chip->dev, pipe, buffer, length,
813 snd_usb_complete_callback(snd_usbmidi_in_urb_complete),
820 static unsigned int snd_usbmidi_count_bits(unsigned int x)
822 unsigned int bits = 0;
830 * Frees an output endpoint.
831 * May be called when ep hasn't been initialized completely.
833 static void snd_usbmidi_out_endpoint_delete(snd_usb_midi_out_endpoint_t* ep)
835 if (ep->tasklet.func)
836 tasklet_kill(&ep->tasklet);
838 kfree(ep->urb->transfer_buffer);
839 usb_free_urb(ep->urb);
845 * Creates an output endpoint, and initializes output ports.
847 static int snd_usbmidi_out_endpoint_create(snd_usb_midi_t* umidi,
848 snd_usb_midi_endpoint_info_t* ep_info,
849 snd_usb_midi_endpoint_t* rep)
851 snd_usb_midi_out_endpoint_t* ep;
857 ep = kcalloc(1, sizeof(*ep), GFP_KERNEL);
862 ep->urb = usb_alloc_urb(0, GFP_KERNEL);
864 snd_usbmidi_out_endpoint_delete(ep);
867 /* we never use interrupt output pipes */
868 pipe = usb_sndbulkpipe(umidi->chip->dev, ep_info->out_ep);
869 ep->max_transfer = usb_maxpacket(umidi->chip->dev, pipe, 1);
870 buffer = kmalloc(ep->max_transfer, GFP_KERNEL);
872 snd_usbmidi_out_endpoint_delete(ep);
875 usb_fill_bulk_urb(ep->urb, umidi->chip->dev, pipe, buffer,
877 snd_usb_complete_callback(snd_usbmidi_out_urb_complete), ep);
879 spin_lock_init(&ep->buffer_lock);
880 tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep);
882 for (i = 0; i < 0x10; ++i)
883 if (ep_info->out_cables & (1 << i)) {
884 ep->ports[i].ep = ep;
885 ep->ports[i].cable = i << 4;
888 if (umidi->usb_protocol_ops->init_out_endpoint)
889 umidi->usb_protocol_ops->init_out_endpoint(ep);
898 static void snd_usbmidi_free(snd_usb_midi_t* umidi)
902 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
903 snd_usb_midi_endpoint_t* ep = &umidi->endpoints[i];
905 snd_usbmidi_out_endpoint_delete(ep->out);
907 snd_usbmidi_in_endpoint_delete(ep->in);
913 * Unlinks all URBs (must be done before the usb_device is deleted).
915 void snd_usbmidi_disconnect(struct list_head* p)
917 snd_usb_midi_t* umidi;
920 umidi = list_entry(p, snd_usb_midi_t, list);
921 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
922 snd_usb_midi_endpoint_t* ep = &umidi->endpoints[i];
923 if (ep->out && ep->out->urb) {
924 usb_kill_urb(ep->out->urb);
925 if (umidi->usb_protocol_ops->finish_out_endpoint)
926 umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
928 if (ep->in && ep->in->urb)
929 usb_kill_urb(ep->in->urb);
933 static void snd_usbmidi_rawmidi_free(snd_rawmidi_t* rmidi)
935 snd_usb_midi_t* umidi = rmidi->private_data;
936 snd_usbmidi_free(umidi);
939 static snd_rawmidi_substream_t* snd_usbmidi_find_substream(snd_usb_midi_t* umidi,
940 int stream, int number)
942 struct list_head* list;
944 list_for_each(list, &umidi->rmidi->streams[stream].substreams) {
945 snd_rawmidi_substream_t* substream = list_entry(list, snd_rawmidi_substream_t, list);
946 if (substream->number == number)
953 * This list specifies names for ports that do not fit into the standard
954 * "(product) MIDI (n)" schema because they aren't external MIDI ports,
955 * such as internal control or synthesizer ports.
960 const char *name_format;
961 } snd_usbmidi_port_names[] = {
963 { USB_ID(0x0582, 0x0000), 2, "%s Control" },
965 { USB_ID(0x0582, 0x0003), 0, "%s Part A" },
966 { USB_ID(0x0582, 0x0003), 1, "%s Part B" },
967 { USB_ID(0x0582, 0x0003), 2, "%s Part C" },
968 { USB_ID(0x0582, 0x0003), 3, "%s Part D" },
969 { USB_ID(0x0582, 0x0003), 4, "%s MIDI 1" },
970 { USB_ID(0x0582, 0x0003), 5, "%s MIDI 2" },
972 { USB_ID(0x0582, 0x0004), 0, "%s MIDI" },
973 { USB_ID(0x0582, 0x0004), 1, "%s Control" },
975 { USB_ID(0x0582, 0x0007), 0, "%s Part A" },
976 { USB_ID(0x0582, 0x0007), 1, "%s Part B" },
977 { USB_ID(0x0582, 0x0007), 2, "%s MIDI" },
979 { USB_ID(0x0582, 0x000b), 0, "%s Part A" },
980 { USB_ID(0x0582, 0x000b), 1, "%s Part B" },
981 { USB_ID(0x0582, 0x000b), 2, "%s MIDI" },
983 { USB_ID(0x0582, 0x000c), 0, "%s Part A" },
984 { USB_ID(0x0582, 0x000c), 1, "%s Part B" },
985 { USB_ID(0x0582, 0x000c), 2, "%s MIDI" },
987 { USB_ID(0x0582, 0x0014), 8, "%s Control" },
989 { USB_ID(0x0582, 0x0016), 0, "%s Part A" },
990 { USB_ID(0x0582, 0x0016), 1, "%s Part B" },
991 { USB_ID(0x0582, 0x0016), 2, "%s MIDI 1" },
992 { USB_ID(0x0582, 0x0016), 3, "%s MIDI 2" },
994 { USB_ID(0x0582, 0x0023), 5, "%s Control" },
996 { USB_ID(0x0582, 0x0027), 0, "%s Part A" },
997 { USB_ID(0x0582, 0x0027), 1, "%s Part B" },
998 { USB_ID(0x0582, 0x0027), 2, "%s MIDI" },
1000 { USB_ID(0x0582, 0x0029), 0, "%s Part A" },
1001 { USB_ID(0x0582, 0x0029), 1, "%s Part B" },
1002 { USB_ID(0x0582, 0x0029), 2, "%s MIDI 1" },
1003 { USB_ID(0x0582, 0x0029), 3, "%s MIDI 2" },
1005 { USB_ID(0x0582, 0x002b), 0, "%s MIDI" },
1006 { USB_ID(0x0582, 0x002b), 1, "%s Control" },
1008 { USB_ID(0x0582, 0x002f), 0, "%s MIDI" },
1009 { USB_ID(0x0582, 0x002f), 1, "%s External MIDI" },
1010 { USB_ID(0x0582, 0x002f), 2, "%s Sync" },
1012 { USB_ID(0x0582, 0x0033), 0, "%s MIDI" },
1013 { USB_ID(0x0582, 0x0033), 1, "%s 1" },
1014 { USB_ID(0x0582, 0x0033), 2, "%s 2" },
1016 { USB_ID(0x0582, 0x003b), 0, "%s MIDI" },
1017 { USB_ID(0x0582, 0x003b), 1, "%s Control" },
1018 /* Edirol UA-1000 */
1019 { USB_ID(0x0582, 0x0044), 0, "%s MIDI" },
1020 { USB_ID(0x0582, 0x0044), 1, "%s Control" },
1022 { USB_ID(0x0582, 0x0048), 0, "%s MIDI" },
1023 { USB_ID(0x0582, 0x0048), 1, "%s 1" },
1024 { USB_ID(0x0582, 0x0048), 2, "%s 2" },
1026 { USB_ID(0x0582, 0x004d), 0, "%s MIDI" },
1027 { USB_ID(0x0582, 0x004d), 1, "%s 1" },
1028 { USB_ID(0x0582, 0x004d), 2, "%s 2" },
1029 /* M-Audio MidiSport 8x8 */
1030 { USB_ID(0x0763, 0x1031), 8, "%s Control" },
1031 { USB_ID(0x0763, 0x1033), 8, "%s Control" },
1033 { USB_ID(0x07fd, 0x0001), 0, "%s MIDI A" },
1034 { USB_ID(0x07fd, 0x0001), 1, "%s MIDI B" },
1035 /* Emagic Unitor8/AMT8/MT4 */
1036 { USB_ID(0x086a, 0x0001), 8, "%s Broadcast" },
1037 { USB_ID(0x086a, 0x0002), 8, "%s Broadcast" },
1038 { USB_ID(0x086a, 0x0003), 4, "%s Broadcast" },
1041 static void snd_usbmidi_init_substream(snd_usb_midi_t* umidi,
1042 int stream, int number,
1043 snd_rawmidi_substream_t** rsubstream)
1046 const char *name_format;
1048 snd_rawmidi_substream_t* substream = snd_usbmidi_find_substream(umidi, stream, number);
1050 snd_printd(KERN_ERR "substream %d:%d not found\n", stream, number);
1054 /* TODO: read port name from jack descriptor */
1055 name_format = "%s MIDI %d";
1056 for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_names); ++i) {
1057 if (snd_usbmidi_port_names[i].id == umidi->chip->usb_id &&
1058 snd_usbmidi_port_names[i].port == number) {
1059 name_format = snd_usbmidi_port_names[i].name_format;
1063 snprintf(substream->name, sizeof(substream->name),
1064 name_format, umidi->chip->card->shortname, number + 1);
1066 *rsubstream = substream;
1070 * Creates the endpoints and their ports.
1072 static int snd_usbmidi_create_endpoints(snd_usb_midi_t* umidi,
1073 snd_usb_midi_endpoint_info_t* endpoints)
1076 int out_ports = 0, in_ports = 0;
1078 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1079 if (endpoints[i].out_cables) {
1080 err = snd_usbmidi_out_endpoint_create(umidi, &endpoints[i],
1081 &umidi->endpoints[i]);
1085 if (endpoints[i].in_cables) {
1086 err = snd_usbmidi_in_endpoint_create(umidi, &endpoints[i],
1087 &umidi->endpoints[i]);
1092 for (j = 0; j < 0x10; ++j) {
1093 if (endpoints[i].out_cables & (1 << j)) {
1094 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, out_ports,
1095 &umidi->endpoints[i].out->ports[j].substream);
1098 if (endpoints[i].in_cables & (1 << j)) {
1099 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, in_ports,
1100 &umidi->endpoints[i].in->ports[j].substream);
1105 snd_printdd(KERN_INFO "created %d output and %d input ports\n",
1106 out_ports, in_ports);
1111 * Returns MIDIStreaming device capabilities.
1113 static int snd_usbmidi_get_ms_info(snd_usb_midi_t* umidi,
1114 snd_usb_midi_endpoint_info_t* endpoints)
1116 struct usb_interface* intf;
1117 struct usb_host_interface *hostif;
1118 struct usb_interface_descriptor* intfd;
1119 struct usb_ms_header_descriptor* ms_header;
1120 struct usb_host_endpoint *hostep;
1121 struct usb_endpoint_descriptor* ep;
1122 struct usb_ms_endpoint_descriptor* ms_ep;
1125 intf = umidi->iface;
1128 hostif = &intf->altsetting[0];
1129 intfd = get_iface_desc(hostif);
1130 ms_header = (struct usb_ms_header_descriptor*)hostif->extra;
1131 if (hostif->extralen >= 7 &&
1132 ms_header->bLength >= 7 &&
1133 ms_header->bDescriptorType == USB_DT_CS_INTERFACE &&
1134 ms_header->bDescriptorSubtype == HEADER)
1135 snd_printdd(KERN_INFO "MIDIStreaming version %02x.%02x\n",
1136 ms_header->bcdMSC[1], ms_header->bcdMSC[0]);
1138 snd_printk(KERN_WARNING "MIDIStreaming interface descriptor not found\n");
1141 for (i = 0; i < intfd->bNumEndpoints; ++i) {
1142 hostep = &hostif->endpoint[i];
1143 ep = get_ep_desc(hostep);
1144 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK &&
1145 (ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
1147 ms_ep = (struct usb_ms_endpoint_descriptor*)hostep->extra;
1148 if (hostep->extralen < 4 ||
1149 ms_ep->bLength < 4 ||
1150 ms_ep->bDescriptorType != USB_DT_CS_ENDPOINT ||
1151 ms_ep->bDescriptorSubtype != MS_GENERAL)
1153 if ((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1154 if (endpoints[epidx].out_ep) {
1155 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1156 snd_printk(KERN_WARNING "too many endpoints\n");
1160 endpoints[epidx].out_ep = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1161 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
1162 endpoints[epidx].out_interval = ep->bInterval;
1163 endpoints[epidx].out_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
1164 snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n",
1165 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1167 if (endpoints[epidx].in_ep) {
1168 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1169 snd_printk(KERN_WARNING "too many endpoints\n");
1173 endpoints[epidx].in_ep = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1174 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
1175 endpoints[epidx].in_interval = ep->bInterval;
1176 endpoints[epidx].in_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
1177 snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n",
1178 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1185 * On Roland devices, use the second alternate setting to be able to use
1186 * the interrupt input endpoint.
1188 static void snd_usbmidi_switch_roland_altsetting(snd_usb_midi_t* umidi)
1190 struct usb_interface* intf;
1191 struct usb_host_interface *hostif;
1192 struct usb_interface_descriptor* intfd;
1194 intf = umidi->iface;
1195 if (!intf || intf->num_altsetting != 2)
1198 hostif = &intf->altsetting[1];
1199 intfd = get_iface_desc(hostif);
1200 if (intfd->bNumEndpoints != 2 ||
1201 (get_endpoint(hostif, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK ||
1202 (get_endpoint(hostif, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
1205 snd_printdd(KERN_INFO "switching to altsetting %d with int ep\n",
1206 intfd->bAlternateSetting);
1207 usb_set_interface(umidi->chip->dev, intfd->bInterfaceNumber,
1208 intfd->bAlternateSetting);
1212 * Try to find any usable endpoints in the interface.
1214 static int snd_usbmidi_detect_endpoints(snd_usb_midi_t* umidi,
1215 snd_usb_midi_endpoint_info_t* endpoint,
1218 struct usb_interface* intf;
1219 struct usb_host_interface *hostif;
1220 struct usb_interface_descriptor* intfd;
1221 struct usb_endpoint_descriptor* epd;
1222 int i, out_eps = 0, in_eps = 0;
1224 if (USB_ID_VENDOR(umidi->chip->usb_id) == 0x0582)
1225 snd_usbmidi_switch_roland_altsetting(umidi);
1227 if (endpoint[0].out_ep || endpoint[0].in_ep)
1230 intf = umidi->iface;
1231 if (!intf || intf->num_altsetting < 1)
1233 hostif = intf->cur_altsetting;
1234 intfd = get_iface_desc(hostif);
1236 for (i = 0; i < intfd->bNumEndpoints; ++i) {
1237 epd = get_endpoint(hostif, i);
1238 if ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK &&
1239 (epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
1241 if (out_eps < max_endpoints &&
1242 (epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1243 endpoint[out_eps].out_ep = epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1244 if ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
1245 endpoint[out_eps].out_interval = epd->bInterval;
1248 if (in_eps < max_endpoints &&
1249 (epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) {
1250 endpoint[in_eps].in_ep = epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1251 if ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
1252 endpoint[in_eps].in_interval = epd->bInterval;
1256 return (out_eps || in_eps) ? 0 : -ENOENT;
1260 * Detects the endpoints for one-port-per-endpoint protocols.
1262 static int snd_usbmidi_detect_per_port_endpoints(snd_usb_midi_t* umidi,
1263 snd_usb_midi_endpoint_info_t* endpoints)
1267 err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS);
1268 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1269 if (endpoints[i].out_ep)
1270 endpoints[i].out_cables = 0x0001;
1271 if (endpoints[i].in_ep)
1272 endpoints[i].in_cables = 0x0001;
1278 * Detects the endpoints and ports of Yamaha devices.
1280 static int snd_usbmidi_detect_yamaha(snd_usb_midi_t* umidi,
1281 snd_usb_midi_endpoint_info_t* endpoint)
1283 struct usb_interface* intf;
1284 struct usb_host_interface *hostif;
1285 struct usb_interface_descriptor* intfd;
1288 intf = umidi->iface;
1291 hostif = intf->altsetting;
1292 intfd = get_iface_desc(hostif);
1293 if (intfd->bNumEndpoints < 1)
1297 * For each port there is one MIDI_IN/OUT_JACK descriptor, not
1298 * necessarily with any useful contents. So simply count 'em.
1300 for (cs_desc = hostif->extra;
1301 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
1302 cs_desc += cs_desc[0]) {
1303 if (cs_desc[1] == CS_AUDIO_INTERFACE) {
1304 if (cs_desc[2] == MIDI_IN_JACK)
1305 endpoint->in_cables = (endpoint->in_cables << 1) | 1;
1306 else if (cs_desc[2] == MIDI_OUT_JACK)
1307 endpoint->out_cables = (endpoint->out_cables << 1) | 1;
1310 if (!endpoint->in_cables && !endpoint->out_cables)
1313 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
1317 * Creates the endpoints and their ports for Midiman devices.
1319 static int snd_usbmidi_create_endpoints_midiman(snd_usb_midi_t* umidi,
1320 snd_usb_midi_endpoint_info_t* endpoint)
1322 snd_usb_midi_endpoint_info_t ep_info;
1323 struct usb_interface* intf;
1324 struct usb_host_interface *hostif;
1325 struct usb_interface_descriptor* intfd;
1326 struct usb_endpoint_descriptor* epd;
1329 intf = umidi->iface;
1332 hostif = intf->altsetting;
1333 intfd = get_iface_desc(hostif);
1335 * The various MidiSport devices have more or less random endpoint
1336 * numbers, so we have to identify the endpoints by their index in
1337 * the descriptor array, like the driver for that other OS does.
1339 * There is one interrupt input endpoint for all input ports, one
1340 * bulk output endpoint for even-numbered ports, and one for odd-
1341 * numbered ports. Both bulk output endpoints have corresponding
1342 * input bulk endpoints (at indices 1 and 3) which aren't used.
1344 if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) {
1345 snd_printdd(KERN_ERR "not enough endpoints\n");
1349 epd = get_endpoint(hostif, 0);
1350 if ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) != USB_DIR_IN ||
1351 (epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT) {
1352 snd_printdd(KERN_ERR "endpoint[0] isn't interrupt\n");
1355 epd = get_endpoint(hostif, 2);
1356 if ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) != USB_DIR_OUT ||
1357 (epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
1358 snd_printdd(KERN_ERR "endpoint[2] isn't bulk output\n");
1361 if (endpoint->out_cables > 0x0001) {
1362 epd = get_endpoint(hostif, 4);
1363 if ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) != USB_DIR_OUT ||
1364 (epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
1365 snd_printdd(KERN_ERR "endpoint[4] isn't bulk output\n");
1370 ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1371 ep_info.out_cables = endpoint->out_cables & 0x5555;
1372 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
1376 ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1377 ep_info.in_interval = get_endpoint(hostif, 0)->bInterval;
1378 ep_info.in_cables = endpoint->in_cables;
1379 err = snd_usbmidi_in_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
1383 if (endpoint->out_cables > 0x0001) {
1384 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1385 ep_info.out_cables = endpoint->out_cables & 0xaaaa;
1386 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[1]);
1391 for (cable = 0; cable < 0x10; ++cable) {
1392 if (endpoint->out_cables & (1 << cable))
1393 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, cable,
1394 &umidi->endpoints[cable & 1].out->ports[cable].substream);
1395 if (endpoint->in_cables & (1 << cable))
1396 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, cable,
1397 &umidi->endpoints[0].in->ports[cable].substream);
1402 static int snd_usbmidi_create_rawmidi(snd_usb_midi_t* umidi,
1403 int out_ports, int in_ports)
1405 snd_rawmidi_t* rmidi;
1408 err = snd_rawmidi_new(umidi->chip->card, "USB MIDI",
1409 umidi->chip->next_midi_device++,
1410 out_ports, in_ports, &rmidi);
1413 strcpy(rmidi->name, umidi->chip->card->shortname);
1414 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
1415 SNDRV_RAWMIDI_INFO_INPUT |
1416 SNDRV_RAWMIDI_INFO_DUPLEX;
1417 rmidi->private_data = umidi;
1418 rmidi->private_free = snd_usbmidi_rawmidi_free;
1419 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_usbmidi_output_ops);
1420 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_usbmidi_input_ops);
1422 umidi->rmidi = rmidi;
1427 * Temporarily stop input.
1429 void snd_usbmidi_input_stop(struct list_head* p)
1431 snd_usb_midi_t* umidi;
1434 umidi = list_entry(p, snd_usb_midi_t, list);
1435 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1436 snd_usb_midi_endpoint_t* ep = &umidi->endpoints[i];
1438 usb_kill_urb(ep->in->urb);
1442 static void snd_usbmidi_input_start_ep(snd_usb_midi_in_endpoint_t* ep)
1445 struct urb* urb = ep->urb;
1446 urb->dev = ep->umidi->chip->dev;
1447 snd_usbmidi_submit_urb(urb, GFP_KERNEL);
1452 * Resume input after a call to snd_usbmidi_input_stop().
1454 void snd_usbmidi_input_start(struct list_head* p)
1456 snd_usb_midi_t* umidi;
1459 umidi = list_entry(p, snd_usb_midi_t, list);
1460 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
1461 snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
1465 * Creates and registers everything needed for a MIDI streaming interface.
1467 int snd_usb_create_midi_interface(snd_usb_audio_t* chip,
1468 struct usb_interface* iface,
1469 const snd_usb_audio_quirk_t* quirk)
1471 snd_usb_midi_t* umidi;
1472 snd_usb_midi_endpoint_info_t endpoints[MIDI_MAX_ENDPOINTS];
1473 int out_ports, in_ports;
1476 umidi = kcalloc(1, sizeof(*umidi), GFP_KERNEL);
1480 umidi->iface = iface;
1481 umidi->quirk = quirk;
1482 umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
1484 /* detect the endpoint(s) to use */
1485 memset(endpoints, 0, sizeof(endpoints));
1487 err = snd_usbmidi_get_ms_info(umidi, endpoints);
1489 switch (quirk->type) {
1490 case QUIRK_MIDI_FIXED_ENDPOINT:
1491 memcpy(&endpoints[0], quirk->data,
1492 sizeof(snd_usb_midi_endpoint_info_t));
1493 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
1495 case QUIRK_MIDI_YAMAHA:
1496 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]);
1498 case QUIRK_MIDI_MIDIMAN:
1499 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
1500 memcpy(&endpoints[0], quirk->data,
1501 sizeof(snd_usb_midi_endpoint_info_t));
1504 case QUIRK_MIDI_NOVATION:
1505 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
1506 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
1508 case QUIRK_MIDI_MOTU:
1509 umidi->usb_protocol_ops = &snd_usbmidi_motu_ops;
1510 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
1512 case QUIRK_MIDI_EMAGIC:
1513 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops;
1514 memcpy(&endpoints[0], quirk->data,
1515 sizeof(snd_usb_midi_endpoint_info_t));
1516 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
1519 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
1529 /* create rawmidi device */
1532 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1533 out_ports += snd_usbmidi_count_bits(endpoints[i].out_cables);
1534 in_ports += snd_usbmidi_count_bits(endpoints[i].in_cables);
1536 err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports);
1542 /* create endpoint/port structures */
1543 if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN)
1544 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]);
1546 err = snd_usbmidi_create_endpoints(umidi, endpoints);
1548 snd_usbmidi_free(umidi);
1552 list_add(&umidi->list, &umidi->chip->midi_list);
1554 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
1555 snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
1559 EXPORT_SYMBOL(snd_usb_create_midi_interface);
1560 EXPORT_SYMBOL(snd_usbmidi_input_stop);
1561 EXPORT_SYMBOL(snd_usbmidi_input_start);
1562 EXPORT_SYMBOL(snd_usbmidi_disconnect);