2 * usbmidi.c - ALSA USB MIDI driver
4 * Copyright (c) 2002-2009 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 <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>
52 #include <sound/core.h>
53 #include <sound/control.h>
54 #include <sound/rawmidi.h>
55 #include <sound/asequencer.h>
62 * define this to log all USB packets
64 /* #define DUMP_PACKETS */
67 * how long to wait after some USB errors, so that hub_wq can disconnect() us
68 * without too many spurious errors
70 #define ERROR_DELAY_JIFFIES (HZ / 10)
76 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
77 MODULE_DESCRIPTION("USB Audio/MIDI helper module");
78 MODULE_LICENSE("Dual BSD/GPL");
81 struct usb_ms_header_descriptor {
84 __u8 bDescriptorSubtype;
87 } __attribute__ ((packed));
89 struct usb_ms_endpoint_descriptor {
92 __u8 bDescriptorSubtype;
94 __u8 baAssocJackID[0];
95 } __attribute__ ((packed));
97 struct snd_usb_midi_in_endpoint;
98 struct snd_usb_midi_out_endpoint;
99 struct snd_usb_midi_endpoint;
101 struct usb_protocol_ops {
102 void (*input)(struct snd_usb_midi_in_endpoint*, uint8_t*, int);
103 void (*output)(struct snd_usb_midi_out_endpoint *ep, struct urb *urb);
104 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t);
105 void (*init_out_endpoint)(struct snd_usb_midi_out_endpoint *);
106 void (*finish_out_endpoint)(struct snd_usb_midi_out_endpoint *);
109 struct snd_usb_midi {
110 struct usb_device *dev;
111 struct snd_card *card;
112 struct usb_interface *iface;
113 const struct snd_usb_audio_quirk *quirk;
114 struct snd_rawmidi *rmidi;
115 const struct usb_protocol_ops *usb_protocol_ops;
116 struct list_head list;
117 struct timer_list error_timer;
118 spinlock_t disc_lock;
119 struct rw_semaphore disc_rwsem;
122 int next_midi_device;
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;
133 struct snd_kcontrol *roland_load_ctl;
136 struct snd_usb_midi_out_endpoint {
137 struct snd_usb_midi *umidi;
138 struct out_urb_context {
140 struct snd_usb_midi_out_endpoint *ep;
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;
149 struct usbmidi_out_port {
150 struct snd_usb_midi_out_endpoint *ep;
151 struct snd_rawmidi_substream *substream;
153 uint8_t cable; /* cable number << 4 */
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
166 wait_queue_head_t drain_wait;
169 struct snd_usb_midi_in_endpoint {
170 struct snd_usb_midi *umidi;
171 struct urb *urbs[INPUT_URBS];
172 struct usbmidi_in_port {
173 struct snd_rawmidi_substream *substream;
174 u8 running_status_length;
183 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep);
185 static const uint8_t snd_usbmidi_cin_length[] = {
186 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
190 * Submits the URB, with error handling.
192 static int snd_usbmidi_submit_urb(struct urb *urb, gfp_t flags)
194 int err = usb_submit_urb(urb, flags);
195 if (err < 0 && err != -ENODEV)
196 dev_err(&urb->dev->dev, "usb_submit_urb: %d\n", err);
201 * Error handling for URB completion functions.
203 static int snd_usbmidi_urb_error(const struct urb *urb)
205 switch (urb->status) {
206 /* manually unlinked, or device gone */
212 /* errors that might occur during unplugging */
218 dev_err(&urb->dev->dev, "urb status %d\n", urb->status);
219 return 0; /* continue */
224 * Receives a chunk of MIDI data.
226 static void snd_usbmidi_input_data(struct snd_usb_midi_in_endpoint *ep,
227 int portidx, uint8_t *data, int length)
229 struct usbmidi_in_port *port = &ep->ports[portidx];
231 if (!port->substream) {
232 dev_dbg(&ep->umidi->dev->dev, "unexpected port %d!\n", portidx);
235 if (!test_bit(port->substream->number, &ep->umidi->input_triggered))
237 snd_rawmidi_receive(port->substream, data, length);
241 static void dump_urb(const char *type, const u8 *data, int length)
243 snd_printk(KERN_DEBUG "%s packet: [", type);
244 for (; length > 0; ++data, --length)
245 printk(" %02x", *data);
249 #define dump_urb(type, data, length) /* nothing */
253 * Processes the data read from the device.
255 static void snd_usbmidi_in_urb_complete(struct urb *urb)
257 struct snd_usb_midi_in_endpoint *ep = urb->context;
259 if (urb->status == 0) {
260 dump_urb("received", urb->transfer_buffer, urb->actual_length);
261 ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer,
264 int err = snd_usbmidi_urb_error(urb);
266 if (err != -ENODEV) {
267 ep->error_resubmit = 1;
268 mod_timer(&ep->umidi->error_timer,
269 jiffies + ERROR_DELAY_JIFFIES);
275 urb->dev = ep->umidi->dev;
276 snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
279 static void snd_usbmidi_out_urb_complete(struct urb *urb)
281 struct out_urb_context *context = urb->context;
282 struct snd_usb_midi_out_endpoint *ep = context->ep;
283 unsigned int urb_index;
285 spin_lock(&ep->buffer_lock);
286 urb_index = context - ep->urbs;
287 ep->active_urbs &= ~(1 << urb_index);
288 if (unlikely(ep->drain_urbs)) {
289 ep->drain_urbs &= ~(1 << urb_index);
290 wake_up(&ep->drain_wait);
292 spin_unlock(&ep->buffer_lock);
293 if (urb->status < 0) {
294 int err = snd_usbmidi_urb_error(urb);
297 mod_timer(&ep->umidi->error_timer,
298 jiffies + ERROR_DELAY_JIFFIES);
302 snd_usbmidi_do_output(ep);
306 * This is called when some data should be transferred to the device
307 * (from one or more substreams).
309 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep)
311 unsigned int urb_index;
315 spin_lock_irqsave(&ep->buffer_lock, flags);
316 if (ep->umidi->disconnected) {
317 spin_unlock_irqrestore(&ep->buffer_lock, flags);
321 urb_index = ep->next_urb;
323 if (!(ep->active_urbs & (1 << urb_index))) {
324 urb = ep->urbs[urb_index].urb;
325 urb->transfer_buffer_length = 0;
326 ep->umidi->usb_protocol_ops->output(ep, urb);
327 if (urb->transfer_buffer_length == 0)
330 dump_urb("sending", urb->transfer_buffer,
331 urb->transfer_buffer_length);
332 urb->dev = ep->umidi->dev;
333 if (snd_usbmidi_submit_urb(urb, GFP_ATOMIC) < 0)
335 ep->active_urbs |= 1 << urb_index;
337 if (++urb_index >= OUTPUT_URBS)
339 if (urb_index == ep->next_urb)
342 ep->next_urb = urb_index;
343 spin_unlock_irqrestore(&ep->buffer_lock, flags);
346 static void snd_usbmidi_out_tasklet(unsigned long data)
348 struct snd_usb_midi_out_endpoint *ep =
349 (struct snd_usb_midi_out_endpoint *) data;
351 snd_usbmidi_do_output(ep);
354 /* called after transfers had been interrupted due to some USB error */
355 static void snd_usbmidi_error_timer(unsigned long data)
357 struct snd_usb_midi *umidi = (struct snd_usb_midi *)data;
360 spin_lock(&umidi->disc_lock);
361 if (umidi->disconnected) {
362 spin_unlock(&umidi->disc_lock);
365 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
366 struct snd_usb_midi_in_endpoint *in = umidi->endpoints[i].in;
367 if (in && in->error_resubmit) {
368 in->error_resubmit = 0;
369 for (j = 0; j < INPUT_URBS; ++j) {
370 if (atomic_read(&in->urbs[j]->use_count))
372 in->urbs[j]->dev = umidi->dev;
373 snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC);
376 if (umidi->endpoints[i].out)
377 snd_usbmidi_do_output(umidi->endpoints[i].out);
379 spin_unlock(&umidi->disc_lock);
382 /* helper function to send static data that may not DMA-able */
383 static int send_bulk_static_data(struct snd_usb_midi_out_endpoint *ep,
384 const void *data, int len)
387 void *buf = kmemdup(data, len, GFP_KERNEL);
390 dump_urb("sending", buf, len);
392 err = usb_bulk_msg(ep->umidi->dev, ep->urbs[0].urb->pipe,
393 buf, len, NULL, 250);
399 * Standard USB MIDI protocol: see the spec.
400 * Midiman protocol: like the standard protocol, but the control byte is the
401 * fourth byte in each packet, and uses length instead of CIN.
404 static void snd_usbmidi_standard_input(struct snd_usb_midi_in_endpoint *ep,
405 uint8_t *buffer, int buffer_length)
409 for (i = 0; i + 3 < buffer_length; i += 4)
410 if (buffer[i] != 0) {
411 int cable = buffer[i] >> 4;
412 int length = snd_usbmidi_cin_length[buffer[i] & 0x0f];
413 snd_usbmidi_input_data(ep, cable, &buffer[i + 1],
418 static void snd_usbmidi_midiman_input(struct snd_usb_midi_in_endpoint *ep,
419 uint8_t *buffer, int buffer_length)
423 for (i = 0; i + 3 < buffer_length; i += 4)
424 if (buffer[i + 3] != 0) {
425 int port = buffer[i + 3] >> 4;
426 int length = buffer[i + 3] & 3;
427 snd_usbmidi_input_data(ep, port, &buffer[i], length);
432 * Buggy M-Audio device: running status on input results in a packet that has
433 * the data bytes but not the status byte and that is marked with CIN 4.
435 static void snd_usbmidi_maudio_broken_running_status_input(
436 struct snd_usb_midi_in_endpoint *ep,
437 uint8_t *buffer, int buffer_length)
441 for (i = 0; i + 3 < buffer_length; i += 4)
442 if (buffer[i] != 0) {
443 int cable = buffer[i] >> 4;
444 u8 cin = buffer[i] & 0x0f;
445 struct usbmidi_in_port *port = &ep->ports[cable];
448 length = snd_usbmidi_cin_length[cin];
449 if (cin == 0xf && buffer[i + 1] >= 0xf8)
450 ; /* realtime msg: no running status change */
451 else if (cin >= 0x8 && cin <= 0xe)
453 port->running_status_length = length - 1;
454 else if (cin == 0x4 &&
455 port->running_status_length != 0 &&
456 buffer[i + 1] < 0x80)
457 /* CIN 4 that is not a SysEx */
458 length = port->running_status_length;
461 * All other msgs cannot begin running status.
462 * (A channel msg sent as two or three CIN 0xF
463 * packets could in theory, but this device
464 * doesn't use this format.)
466 port->running_status_length = 0;
467 snd_usbmidi_input_data(ep, cable, &buffer[i + 1],
473 * QinHeng CH345 is buggy: every second packet inside a SysEx has not CIN 4
474 * but the previously seen CIN, but still with three data bytes.
476 static void ch345_broken_sysex_input(struct snd_usb_midi_in_endpoint *ep,
477 uint8_t *buffer, int buffer_length)
479 unsigned int i, cin, length;
481 for (i = 0; i + 3 < buffer_length; i += 4) {
482 if (buffer[i] == 0 && i > 0)
484 cin = buffer[i] & 0x0f;
486 cin == ep->last_cin &&
487 (buffer[i + 1 + (cin == 0x6)] & 0x80) == 0)
490 if (buffer[i + 1] == 0x90) {
492 * Either a corrupted running status or a real note-on
493 * message; impossible to detect reliably.
497 length = snd_usbmidi_cin_length[cin];
498 snd_usbmidi_input_data(ep, 0, &buffer[i + 1], length);
499 ep->in_sysex = cin == 0x4;
506 * CME protocol: like the standard protocol, but SysEx commands are sent as a
507 * single USB packet preceded by a 0x0F byte.
509 static void snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint *ep,
510 uint8_t *buffer, int buffer_length)
512 if (buffer_length < 2 || (buffer[0] & 0x0f) != 0x0f)
513 snd_usbmidi_standard_input(ep, buffer, buffer_length);
515 snd_usbmidi_input_data(ep, buffer[0] >> 4,
516 &buffer[1], buffer_length - 1);
520 * Adds one USB MIDI packet to the output buffer.
522 static void snd_usbmidi_output_standard_packet(struct urb *urb, uint8_t p0,
523 uint8_t p1, uint8_t p2,
528 (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length;
533 urb->transfer_buffer_length += 4;
537 * Adds one Midiman packet to the output buffer.
539 static void snd_usbmidi_output_midiman_packet(struct urb *urb, uint8_t p0,
540 uint8_t p1, uint8_t p2,
545 (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length;
549 buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f];
550 urb->transfer_buffer_length += 4;
554 * Converts MIDI commands to USB MIDI packets.
556 static void snd_usbmidi_transmit_byte(struct usbmidi_out_port *port,
557 uint8_t b, struct urb *urb)
559 uint8_t p0 = port->cable;
560 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) =
561 port->ep->umidi->usb_protocol_ops->output_packet;
564 output_packet(urb, p0 | 0x0f, b, 0, 0);
565 } else if (b >= 0xf0) {
569 port->state = STATE_SYSEX_1;
574 port->state = STATE_1PARAM;
578 port->state = STATE_2PARAM_1;
582 port->state = STATE_UNKNOWN;
585 output_packet(urb, p0 | 0x05, 0xf6, 0, 0);
586 port->state = STATE_UNKNOWN;
589 switch (port->state) {
591 output_packet(urb, p0 | 0x05, 0xf7, 0, 0);
594 output_packet(urb, p0 | 0x06, port->data[0],
598 output_packet(urb, p0 | 0x07, port->data[0],
599 port->data[1], 0xf7);
602 port->state = STATE_UNKNOWN;
605 } else if (b >= 0x80) {
607 if (b >= 0xc0 && b <= 0xdf)
608 port->state = STATE_1PARAM;
610 port->state = STATE_2PARAM_1;
611 } else { /* b < 0x80 */
612 switch (port->state) {
614 if (port->data[0] < 0xf0) {
615 p0 |= port->data[0] >> 4;
618 port->state = STATE_UNKNOWN;
620 output_packet(urb, p0, port->data[0], b, 0);
624 port->state = STATE_2PARAM_2;
627 if (port->data[0] < 0xf0) {
628 p0 |= port->data[0] >> 4;
629 port->state = STATE_2PARAM_1;
632 port->state = STATE_UNKNOWN;
634 output_packet(urb, p0, port->data[0], port->data[1], b);
638 port->state = STATE_SYSEX_1;
642 port->state = STATE_SYSEX_2;
645 output_packet(urb, p0 | 0x04, port->data[0],
647 port->state = STATE_SYSEX_0;
653 static void snd_usbmidi_standard_output(struct snd_usb_midi_out_endpoint *ep,
658 /* FIXME: lower-numbered ports can starve higher-numbered ports */
659 for (p = 0; p < 0x10; ++p) {
660 struct usbmidi_out_port *port = &ep->ports[p];
663 while (urb->transfer_buffer_length + 3 < ep->max_transfer) {
665 if (snd_rawmidi_transmit(port->substream, &b, 1) != 1) {
669 snd_usbmidi_transmit_byte(port, b, urb);
674 static const struct usb_protocol_ops snd_usbmidi_standard_ops = {
675 .input = snd_usbmidi_standard_input,
676 .output = snd_usbmidi_standard_output,
677 .output_packet = snd_usbmidi_output_standard_packet,
680 static const struct usb_protocol_ops snd_usbmidi_midiman_ops = {
681 .input = snd_usbmidi_midiman_input,
682 .output = snd_usbmidi_standard_output,
683 .output_packet = snd_usbmidi_output_midiman_packet,
687 struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = {
688 .input = snd_usbmidi_maudio_broken_running_status_input,
689 .output = snd_usbmidi_standard_output,
690 .output_packet = snd_usbmidi_output_standard_packet,
693 static const struct usb_protocol_ops snd_usbmidi_cme_ops = {
694 .input = snd_usbmidi_cme_input,
695 .output = snd_usbmidi_standard_output,
696 .output_packet = snd_usbmidi_output_standard_packet,
699 static const struct usb_protocol_ops snd_usbmidi_ch345_broken_sysex_ops = {
700 .input = ch345_broken_sysex_input,
701 .output = snd_usbmidi_standard_output,
702 .output_packet = snd_usbmidi_output_standard_packet,
706 * AKAI MPD16 protocol:
708 * For control port (endpoint 1):
709 * ==============================
710 * One or more chunks consisting of first byte of (0x10 | msg_len) and then a
711 * SysEx message (msg_len=9 bytes long).
713 * For data port (endpoint 2):
714 * ===========================
715 * One or more chunks consisting of first byte of (0x20 | msg_len) and then a
716 * MIDI message (msg_len bytes long)
718 * Messages sent: Active Sense, Note On, Poly Pressure, Control Change.
720 static void snd_usbmidi_akai_input(struct snd_usb_midi_in_endpoint *ep,
721 uint8_t *buffer, int buffer_length)
723 unsigned int pos = 0;
724 unsigned int len = (unsigned int)buffer_length;
726 unsigned int port = (buffer[pos] >> 4) - 1;
727 unsigned int msg_len = buffer[pos] & 0x0f;
729 if (pos + msg_len <= len && port < 2)
730 snd_usbmidi_input_data(ep, 0, &buffer[pos], msg_len);
735 #define MAX_AKAI_SYSEX_LEN 9
737 static void snd_usbmidi_akai_output(struct snd_usb_midi_out_endpoint *ep,
741 int pos, end, count, buf_end;
742 uint8_t tmp[MAX_AKAI_SYSEX_LEN];
743 struct snd_rawmidi_substream *substream = ep->ports[0].substream;
745 if (!ep->ports[0].active)
748 msg = urb->transfer_buffer + urb->transfer_buffer_length;
749 buf_end = ep->max_transfer - MAX_AKAI_SYSEX_LEN - 1;
751 /* only try adding more data when there's space for at least 1 SysEx */
752 while (urb->transfer_buffer_length < buf_end) {
753 count = snd_rawmidi_transmit_peek(substream,
754 tmp, MAX_AKAI_SYSEX_LEN);
756 ep->ports[0].active = 0;
759 /* try to skip non-SysEx data */
760 for (pos = 0; pos < count && tmp[pos] != 0xF0; pos++)
764 snd_rawmidi_transmit_ack(substream, pos);
768 /* look for the start or end marker */
769 for (end = 1; end < count && tmp[end] < 0xF0; end++)
772 /* next SysEx started before the end of current one */
773 if (end < count && tmp[end] == 0xF0) {
774 /* it's incomplete - drop it */
775 snd_rawmidi_transmit_ack(substream, end);
779 if (end < count && tmp[end] == 0xF7) {
780 /* queue it, ack it, and get the next one */
782 msg[0] = 0x10 | count;
783 memcpy(&msg[1], tmp, count);
784 snd_rawmidi_transmit_ack(substream, count);
785 urb->transfer_buffer_length += count + 1;
789 /* less than 9 bytes and no end byte - wait for more */
790 if (count < MAX_AKAI_SYSEX_LEN) {
791 ep->ports[0].active = 0;
794 /* 9 bytes and no end marker in sight - malformed, skip it */
795 snd_rawmidi_transmit_ack(substream, count);
799 static const struct usb_protocol_ops snd_usbmidi_akai_ops = {
800 .input = snd_usbmidi_akai_input,
801 .output = snd_usbmidi_akai_output,
805 * Novation USB MIDI protocol: number of data bytes is in the first byte
806 * (when receiving) (+1!) or in the second byte (when sending); data begins
810 static void snd_usbmidi_novation_input(struct snd_usb_midi_in_endpoint *ep,
811 uint8_t *buffer, int buffer_length)
813 if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1)
815 snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1);
818 static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint *ep,
821 uint8_t *transfer_buffer;
824 if (!ep->ports[0].active)
826 transfer_buffer = urb->transfer_buffer;
827 count = snd_rawmidi_transmit(ep->ports[0].substream,
829 ep->max_transfer - 2);
831 ep->ports[0].active = 0;
834 transfer_buffer[0] = 0;
835 transfer_buffer[1] = count;
836 urb->transfer_buffer_length = 2 + count;
839 static const struct usb_protocol_ops snd_usbmidi_novation_ops = {
840 .input = snd_usbmidi_novation_input,
841 .output = snd_usbmidi_novation_output,
845 * "raw" protocol: just move raw MIDI bytes from/to the endpoint
848 static void snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint *ep,
849 uint8_t *buffer, int buffer_length)
851 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
854 static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint *ep,
859 if (!ep->ports[0].active)
861 count = snd_rawmidi_transmit(ep->ports[0].substream,
862 urb->transfer_buffer,
865 ep->ports[0].active = 0;
868 urb->transfer_buffer_length = count;
871 static const struct usb_protocol_ops snd_usbmidi_raw_ops = {
872 .input = snd_usbmidi_raw_input,
873 .output = snd_usbmidi_raw_output,
877 * FTDI protocol: raw MIDI bytes, but input packets have two modem status bytes.
880 static void snd_usbmidi_ftdi_input(struct snd_usb_midi_in_endpoint *ep,
881 uint8_t *buffer, int buffer_length)
883 if (buffer_length > 2)
884 snd_usbmidi_input_data(ep, 0, buffer + 2, buffer_length - 2);
887 static const struct usb_protocol_ops snd_usbmidi_ftdi_ops = {
888 .input = snd_usbmidi_ftdi_input,
889 .output = snd_usbmidi_raw_output,
892 static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep,
893 uint8_t *buffer, int buffer_length)
895 if (buffer_length != 9)
898 while (buffer_length && buffer[buffer_length - 1] == 0xFD)
901 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
904 static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep,
909 if (!ep->ports[0].active)
911 switch (snd_usb_get_speed(ep->umidi->dev)) {
913 case USB_SPEED_SUPER:
914 case USB_SPEED_SUPER_PLUS:
920 count = snd_rawmidi_transmit(ep->ports[0].substream,
921 urb->transfer_buffer,
924 ep->ports[0].active = 0;
928 memset(urb->transfer_buffer + count, 0xFD, ep->max_transfer - count);
929 urb->transfer_buffer_length = ep->max_transfer;
932 static const struct usb_protocol_ops snd_usbmidi_122l_ops = {
933 .input = snd_usbmidi_us122l_input,
934 .output = snd_usbmidi_us122l_output,
938 * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching.
941 static void snd_usbmidi_emagic_init_out(struct snd_usb_midi_out_endpoint *ep)
943 static const u8 init_data[] = {
944 /* initialization magic: "get version" */
946 0x00, 0x20, 0x31, /* Emagic */
948 0x0b, /* version number request */
949 0x00, /* command version */
950 0x00, /* EEPROM, box 0 */
953 send_bulk_static_data(ep, init_data, sizeof(init_data));
954 /* while we're at it, pour on more magic */
955 send_bulk_static_data(ep, init_data, sizeof(init_data));
958 static void snd_usbmidi_emagic_finish_out(struct snd_usb_midi_out_endpoint *ep)
960 static const u8 finish_data[] = {
961 /* switch to patch mode with last preset */
963 0x00, 0x20, 0x31, /* Emagic */
965 0x10, /* patch switch command */
966 0x00, /* command version */
967 0x7f, /* to all boxes */
968 0x40, /* last preset in EEPROM */
971 send_bulk_static_data(ep, finish_data, sizeof(finish_data));
974 static void snd_usbmidi_emagic_input(struct snd_usb_midi_in_endpoint *ep,
975 uint8_t *buffer, int buffer_length)
979 /* FF indicates end of valid data */
980 for (i = 0; i < buffer_length; ++i)
981 if (buffer[i] == 0xff) {
986 /* handle F5 at end of last buffer */
990 while (buffer_length > 0) {
991 /* determine size of data until next F5 */
992 for (i = 0; i < buffer_length; ++i)
993 if (buffer[i] == 0xf5)
995 snd_usbmidi_input_data(ep, ep->current_port, buffer, i);
999 if (buffer_length <= 0)
1001 /* assert(buffer[0] == 0xf5); */
1007 if (buffer_length <= 0)
1009 if (buffer[0] < 0x80) {
1010 ep->current_port = (buffer[0] - 1) & 15;
1018 static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint *ep,
1021 int port0 = ep->current_port;
1022 uint8_t *buf = urb->transfer_buffer;
1023 int buf_free = ep->max_transfer;
1026 for (i = 0; i < 0x10; ++i) {
1027 /* round-robin, starting at the last current port */
1028 int portnum = (port0 + i) & 15;
1029 struct usbmidi_out_port *port = &ep->ports[portnum];
1033 if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) {
1038 if (portnum != ep->current_port) {
1041 ep->current_port = portnum;
1043 buf[1] = (portnum + 1) & 15;
1050 length = snd_rawmidi_transmit(port->substream, buf, buf_free);
1058 if (buf_free < ep->max_transfer && buf_free > 0) {
1062 urb->transfer_buffer_length = ep->max_transfer - buf_free;
1065 static const struct usb_protocol_ops snd_usbmidi_emagic_ops = {
1066 .input = snd_usbmidi_emagic_input,
1067 .output = snd_usbmidi_emagic_output,
1068 .init_out_endpoint = snd_usbmidi_emagic_init_out,
1069 .finish_out_endpoint = snd_usbmidi_emagic_finish_out,
1073 static void update_roland_altsetting(struct snd_usb_midi *umidi)
1075 struct usb_interface *intf;
1076 struct usb_host_interface *hostif;
1077 struct usb_interface_descriptor *intfd;
1080 intf = umidi->iface;
1081 is_light_load = intf->cur_altsetting != intf->altsetting;
1082 if (umidi->roland_load_ctl->private_value == is_light_load)
1084 hostif = &intf->altsetting[umidi->roland_load_ctl->private_value];
1085 intfd = get_iface_desc(hostif);
1086 snd_usbmidi_input_stop(&umidi->list);
1087 usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
1088 intfd->bAlternateSetting);
1089 snd_usbmidi_input_start(&umidi->list);
1092 static int substream_open(struct snd_rawmidi_substream *substream, int dir,
1095 struct snd_usb_midi *umidi = substream->rmidi->private_data;
1096 struct snd_kcontrol *ctl;
1098 down_read(&umidi->disc_rwsem);
1099 if (umidi->disconnected) {
1100 up_read(&umidi->disc_rwsem);
1101 return open ? -ENODEV : 0;
1104 mutex_lock(&umidi->mutex);
1106 if (!umidi->opened[0] && !umidi->opened[1]) {
1107 if (umidi->roland_load_ctl) {
1108 ctl = umidi->roland_load_ctl;
1109 ctl->vd[0].access |=
1110 SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1111 snd_ctl_notify(umidi->card,
1112 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
1113 update_roland_altsetting(umidi);
1116 umidi->opened[dir]++;
1117 if (umidi->opened[1])
1118 snd_usbmidi_input_start(&umidi->list);
1120 umidi->opened[dir]--;
1121 if (!umidi->opened[1])
1122 snd_usbmidi_input_stop(&umidi->list);
1123 if (!umidi->opened[0] && !umidi->opened[1]) {
1124 if (umidi->roland_load_ctl) {
1125 ctl = umidi->roland_load_ctl;
1126 ctl->vd[0].access &=
1127 ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1128 snd_ctl_notify(umidi->card,
1129 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
1133 mutex_unlock(&umidi->mutex);
1134 up_read(&umidi->disc_rwsem);
1138 static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream)
1140 struct snd_usb_midi *umidi = substream->rmidi->private_data;
1141 struct usbmidi_out_port *port = NULL;
1144 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
1145 if (umidi->endpoints[i].out)
1146 for (j = 0; j < 0x10; ++j)
1147 if (umidi->endpoints[i].out->ports[j].substream == substream) {
1148 port = &umidi->endpoints[i].out->ports[j];
1156 substream->runtime->private_data = port;
1157 port->state = STATE_UNKNOWN;
1158 return substream_open(substream, 0, 1);
1161 static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream)
1163 return substream_open(substream, 0, 0);
1166 static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream,
1169 struct usbmidi_out_port *port =
1170 (struct usbmidi_out_port *)substream->runtime->private_data;
1174 if (port->ep->umidi->disconnected) {
1175 /* gobble up remaining bytes to prevent wait in
1176 * snd_rawmidi_drain_output */
1177 while (!snd_rawmidi_transmit_empty(substream))
1178 snd_rawmidi_transmit_ack(substream, 1);
1181 tasklet_schedule(&port->ep->tasklet);
1185 static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream)
1187 struct usbmidi_out_port *port = substream->runtime->private_data;
1188 struct snd_usb_midi_out_endpoint *ep = port->ep;
1189 unsigned int drain_urbs;
1191 long timeout = msecs_to_jiffies(50);
1193 if (ep->umidi->disconnected)
1196 * The substream buffer is empty, but some data might still be in the
1197 * currently active URBs, so we have to wait for those to complete.
1199 spin_lock_irq(&ep->buffer_lock);
1200 drain_urbs = ep->active_urbs;
1202 ep->drain_urbs |= drain_urbs;
1204 prepare_to_wait(&ep->drain_wait, &wait,
1205 TASK_UNINTERRUPTIBLE);
1206 spin_unlock_irq(&ep->buffer_lock);
1207 timeout = schedule_timeout(timeout);
1208 spin_lock_irq(&ep->buffer_lock);
1209 drain_urbs &= ep->drain_urbs;
1210 } while (drain_urbs && timeout);
1211 finish_wait(&ep->drain_wait, &wait);
1213 spin_unlock_irq(&ep->buffer_lock);
1216 static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream)
1218 return substream_open(substream, 1, 1);
1221 static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream)
1223 return substream_open(substream, 1, 0);
1226 static void snd_usbmidi_input_trigger(struct snd_rawmidi_substream *substream,
1229 struct snd_usb_midi *umidi = substream->rmidi->private_data;
1232 set_bit(substream->number, &umidi->input_triggered);
1234 clear_bit(substream->number, &umidi->input_triggered);
1237 static struct snd_rawmidi_ops snd_usbmidi_output_ops = {
1238 .open = snd_usbmidi_output_open,
1239 .close = snd_usbmidi_output_close,
1240 .trigger = snd_usbmidi_output_trigger,
1241 .drain = snd_usbmidi_output_drain,
1244 static struct snd_rawmidi_ops snd_usbmidi_input_ops = {
1245 .open = snd_usbmidi_input_open,
1246 .close = snd_usbmidi_input_close,
1247 .trigger = snd_usbmidi_input_trigger
1250 static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb,
1251 unsigned int buffer_length)
1253 usb_free_coherent(umidi->dev, buffer_length,
1254 urb->transfer_buffer, urb->transfer_dma);
1259 * Frees an input endpoint.
1260 * May be called when ep hasn't been initialized completely.
1262 static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint *ep)
1266 for (i = 0; i < INPUT_URBS; ++i)
1268 free_urb_and_buffer(ep->umidi, ep->urbs[i],
1269 ep->urbs[i]->transfer_buffer_length);
1274 * Creates an input endpoint.
1276 static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi *umidi,
1277 struct snd_usb_midi_endpoint_info *ep_info,
1278 struct snd_usb_midi_endpoint *rep)
1280 struct snd_usb_midi_in_endpoint *ep;
1287 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1292 for (i = 0; i < INPUT_URBS; ++i) {
1293 ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
1295 snd_usbmidi_in_endpoint_delete(ep);
1299 if (ep_info->in_interval)
1300 pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep);
1302 pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep);
1303 length = usb_maxpacket(umidi->dev, pipe, 0);
1304 for (i = 0; i < INPUT_URBS; ++i) {
1305 buffer = usb_alloc_coherent(umidi->dev, length, GFP_KERNEL,
1306 &ep->urbs[i]->transfer_dma);
1308 snd_usbmidi_in_endpoint_delete(ep);
1311 if (ep_info->in_interval)
1312 usb_fill_int_urb(ep->urbs[i], umidi->dev,
1313 pipe, buffer, length,
1314 snd_usbmidi_in_urb_complete,
1315 ep, ep_info->in_interval);
1317 usb_fill_bulk_urb(ep->urbs[i], umidi->dev,
1318 pipe, buffer, length,
1319 snd_usbmidi_in_urb_complete, ep);
1320 ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1328 * Frees an output endpoint.
1329 * May be called when ep hasn't been initialized completely.
1331 static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep)
1335 for (i = 0; i < OUTPUT_URBS; ++i)
1336 if (ep->urbs[i].urb) {
1337 free_urb_and_buffer(ep->umidi, ep->urbs[i].urb,
1339 ep->urbs[i].urb = NULL;
1343 static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep)
1345 snd_usbmidi_out_endpoint_clear(ep);
1350 * Creates an output endpoint, and initializes output ports.
1352 static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi *umidi,
1353 struct snd_usb_midi_endpoint_info *ep_info,
1354 struct snd_usb_midi_endpoint *rep)
1356 struct snd_usb_midi_out_endpoint *ep;
1362 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1367 for (i = 0; i < OUTPUT_URBS; ++i) {
1368 ep->urbs[i].urb = usb_alloc_urb(0, GFP_KERNEL);
1369 if (!ep->urbs[i].urb) {
1370 snd_usbmidi_out_endpoint_delete(ep);
1373 ep->urbs[i].ep = ep;
1375 if (ep_info->out_interval)
1376 pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep);
1378 pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep);
1379 switch (umidi->usb_id) {
1381 ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1);
1384 * Various chips declare a packet size larger than 4 bytes, but
1385 * do not actually work with larger packets:
1387 case USB_ID(0x0a67, 0x5011): /* Medeli DD305 */
1388 case USB_ID(0x0a92, 0x1020): /* ESI M4U */
1389 case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */
1390 case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */
1391 case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */
1392 case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */
1393 case USB_ID(0xfc08, 0x0101): /* Unknown vendor Cable */
1394 ep->max_transfer = 4;
1397 * Some devices only work with 9 bytes packet size:
1399 case USB_ID(0x0644, 0x800E): /* Tascam US-122L */
1400 case USB_ID(0x0644, 0x800F): /* Tascam US-144 */
1401 ep->max_transfer = 9;
1404 for (i = 0; i < OUTPUT_URBS; ++i) {
1405 buffer = usb_alloc_coherent(umidi->dev,
1406 ep->max_transfer, GFP_KERNEL,
1407 &ep->urbs[i].urb->transfer_dma);
1409 snd_usbmidi_out_endpoint_delete(ep);
1412 if (ep_info->out_interval)
1413 usb_fill_int_urb(ep->urbs[i].urb, umidi->dev,
1414 pipe, buffer, ep->max_transfer,
1415 snd_usbmidi_out_urb_complete,
1416 &ep->urbs[i], ep_info->out_interval);
1418 usb_fill_bulk_urb(ep->urbs[i].urb, umidi->dev,
1419 pipe, buffer, ep->max_transfer,
1420 snd_usbmidi_out_urb_complete,
1422 ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1425 spin_lock_init(&ep->buffer_lock);
1426 tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep);
1427 init_waitqueue_head(&ep->drain_wait);
1429 for (i = 0; i < 0x10; ++i)
1430 if (ep_info->out_cables & (1 << i)) {
1431 ep->ports[i].ep = ep;
1432 ep->ports[i].cable = i << 4;
1435 if (umidi->usb_protocol_ops->init_out_endpoint)
1436 umidi->usb_protocol_ops->init_out_endpoint(ep);
1445 static void snd_usbmidi_free(struct snd_usb_midi *umidi)
1449 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1450 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
1452 snd_usbmidi_out_endpoint_delete(ep->out);
1454 snd_usbmidi_in_endpoint_delete(ep->in);
1456 mutex_destroy(&umidi->mutex);
1461 * Unlinks all URBs (must be done before the usb_device is deleted).
1463 void snd_usbmidi_disconnect(struct list_head *p)
1465 struct snd_usb_midi *umidi;
1468 umidi = list_entry(p, struct snd_usb_midi, list);
1470 * an URB's completion handler may start the timer and
1471 * a timer may submit an URB. To reliably break the cycle
1472 * a flag under lock must be used
1474 down_write(&umidi->disc_rwsem);
1475 spin_lock_irq(&umidi->disc_lock);
1476 umidi->disconnected = 1;
1477 spin_unlock_irq(&umidi->disc_lock);
1478 up_write(&umidi->disc_rwsem);
1480 del_timer_sync(&umidi->error_timer);
1482 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1483 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
1485 tasklet_kill(&ep->out->tasklet);
1487 for (j = 0; j < OUTPUT_URBS; ++j)
1488 usb_kill_urb(ep->out->urbs[j].urb);
1489 if (umidi->usb_protocol_ops->finish_out_endpoint)
1490 umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
1491 ep->out->active_urbs = 0;
1492 if (ep->out->drain_urbs) {
1493 ep->out->drain_urbs = 0;
1494 wake_up(&ep->out->drain_wait);
1498 for (j = 0; j < INPUT_URBS; ++j)
1499 usb_kill_urb(ep->in->urbs[j]);
1500 /* free endpoints here; later call can result in Oops */
1502 snd_usbmidi_out_endpoint_clear(ep->out);
1504 snd_usbmidi_in_endpoint_delete(ep->in);
1509 EXPORT_SYMBOL(snd_usbmidi_disconnect);
1511 static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi)
1513 struct snd_usb_midi *umidi = rmidi->private_data;
1514 snd_usbmidi_free(umidi);
1517 static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi *umidi,
1521 struct snd_rawmidi_substream *substream;
1523 list_for_each_entry(substream, &umidi->rmidi->streams[stream].substreams,
1525 if (substream->number == number)
1532 * This list specifies names for ports that do not fit into the standard
1533 * "(product) MIDI (n)" schema because they aren't external MIDI ports,
1534 * such as internal control or synthesizer ports.
1536 static struct port_info {
1541 unsigned int seq_flags;
1542 } snd_usbmidi_port_info[] = {
1543 #define PORT_INFO(vendor, product, num, name_, voices_, flags) \
1544 { .id = USB_ID(vendor, product), \
1545 .port = num, .voices = voices_, \
1546 .name = name_, .seq_flags = flags }
1547 #define EXTERNAL_PORT(vendor, product, num, name) \
1548 PORT_INFO(vendor, product, num, name, 0, \
1549 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1550 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1551 SNDRV_SEQ_PORT_TYPE_PORT)
1552 #define CONTROL_PORT(vendor, product, num, name) \
1553 PORT_INFO(vendor, product, num, name, 0, \
1554 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1555 SNDRV_SEQ_PORT_TYPE_HARDWARE)
1556 #define GM_SYNTH_PORT(vendor, product, num, name, voices) \
1557 PORT_INFO(vendor, product, num, name, voices, \
1558 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1559 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1560 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1561 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1562 #define ROLAND_SYNTH_PORT(vendor, product, num, name, voices) \
1563 PORT_INFO(vendor, product, num, name, voices, \
1564 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1565 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1566 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1567 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1568 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1569 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1570 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1571 #define SOUNDCANVAS_PORT(vendor, product, num, name, voices) \
1572 PORT_INFO(vendor, product, num, name, voices, \
1573 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1574 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1575 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1576 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1577 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1578 SNDRV_SEQ_PORT_TYPE_MIDI_MT32 | \
1579 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1580 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1581 /* Yamaha MOTIF XF */
1582 GM_SYNTH_PORT(0x0499, 0x105c, 0, "%s Tone Generator", 128),
1583 CONTROL_PORT(0x0499, 0x105c, 1, "%s Remote Control"),
1584 EXTERNAL_PORT(0x0499, 0x105c, 2, "%s Thru"),
1585 CONTROL_PORT(0x0499, 0x105c, 3, "%s Editor"),
1587 CONTROL_PORT(0x0582, 0x0000, 2, "%s Control"),
1588 /* Roland SC-8850 */
1589 SOUNDCANVAS_PORT(0x0582, 0x0003, 0, "%s Part A", 128),
1590 SOUNDCANVAS_PORT(0x0582, 0x0003, 1, "%s Part B", 128),
1591 SOUNDCANVAS_PORT(0x0582, 0x0003, 2, "%s Part C", 128),
1592 SOUNDCANVAS_PORT(0x0582, 0x0003, 3, "%s Part D", 128),
1593 EXTERNAL_PORT(0x0582, 0x0003, 4, "%s MIDI 1"),
1594 EXTERNAL_PORT(0x0582, 0x0003, 5, "%s MIDI 2"),
1596 EXTERNAL_PORT(0x0582, 0x0004, 0, "%s MIDI"),
1597 CONTROL_PORT(0x0582, 0x0004, 1, "%s Control"),
1598 /* Roland SC-8820 */
1599 SOUNDCANVAS_PORT(0x0582, 0x0007, 0, "%s Part A", 64),
1600 SOUNDCANVAS_PORT(0x0582, 0x0007, 1, "%s Part B", 64),
1601 EXTERNAL_PORT(0x0582, 0x0007, 2, "%s MIDI"),
1603 SOUNDCANVAS_PORT(0x0582, 0x000b, 0, "%s Part A", 64),
1604 SOUNDCANVAS_PORT(0x0582, 0x000b, 1, "%s Part B", 64),
1605 EXTERNAL_PORT(0x0582, 0x000b, 2, "%s MIDI"),
1607 SOUNDCANVAS_PORT(0x0582, 0x000c, 0, "%s Part A", 64),
1608 SOUNDCANVAS_PORT(0x0582, 0x000c, 1, "%s Part B", 64),
1609 EXTERNAL_PORT(0x0582, 0x000c, 2, "%s MIDI"),
1611 CONTROL_PORT(0x0582, 0x0014, 8, "%s Control"),
1613 ROLAND_SYNTH_PORT(0x0582, 0x0016, 0, "%s Part A", 128),
1614 ROLAND_SYNTH_PORT(0x0582, 0x0016, 1, "%s Part B", 128),
1615 EXTERNAL_PORT(0x0582, 0x0016, 2, "%s MIDI 1"),
1616 EXTERNAL_PORT(0x0582, 0x0016, 3, "%s MIDI 2"),
1618 CONTROL_PORT(0x0582, 0x0023, 5, "%s Control"),
1620 ROLAND_SYNTH_PORT(0x0582, 0x0027, 0, "%s Part A", 64),
1621 ROLAND_SYNTH_PORT(0x0582, 0x0027, 1, "%s Part B", 64),
1622 EXTERNAL_PORT(0x0582, 0x0027, 2, "%s MIDI"),
1624 ROLAND_SYNTH_PORT(0x0582, 0x0029, 0, "%s Part A", 128),
1625 ROLAND_SYNTH_PORT(0x0582, 0x0029, 1, "%s Part B", 128),
1626 EXTERNAL_PORT(0x0582, 0x0029, 2, "%s MIDI 1"),
1627 EXTERNAL_PORT(0x0582, 0x0029, 3, "%s MIDI 2"),
1629 EXTERNAL_PORT(0x0582, 0x002b, 0, "%s MIDI"),
1630 CONTROL_PORT(0x0582, 0x002b, 1, "%s Control"),
1632 EXTERNAL_PORT(0x0582, 0x002f, 0, "%s MIDI"),
1633 EXTERNAL_PORT(0x0582, 0x002f, 1, "%s External MIDI"),
1634 EXTERNAL_PORT(0x0582, 0x002f, 2, "%s Sync"),
1636 EXTERNAL_PORT(0x0582, 0x0033, 0, "%s MIDI"),
1637 EXTERNAL_PORT(0x0582, 0x0033, 1, "%s 1"),
1638 EXTERNAL_PORT(0x0582, 0x0033, 2, "%s 2"),
1640 EXTERNAL_PORT(0x0582, 0x003b, 0, "%s MIDI"),
1641 CONTROL_PORT(0x0582, 0x003b, 1, "%s Control"),
1642 /* Edirol UA-1000 */
1643 EXTERNAL_PORT(0x0582, 0x0044, 0, "%s MIDI"),
1644 CONTROL_PORT(0x0582, 0x0044, 1, "%s Control"),
1646 EXTERNAL_PORT(0x0582, 0x0048, 0, "%s MIDI"),
1647 EXTERNAL_PORT(0x0582, 0x0048, 1, "%s 1"),
1648 EXTERNAL_PORT(0x0582, 0x0048, 2, "%s 2"),
1650 EXTERNAL_PORT(0x0582, 0x004d, 0, "%s MIDI"),
1651 EXTERNAL_PORT(0x0582, 0x004d, 1, "%s 1"),
1652 EXTERNAL_PORT(0x0582, 0x004d, 2, "%s 2"),
1654 CONTROL_PORT(0x0582, 0x0089, 0, "%s Control"),
1656 CONTROL_PORT(0x0582, 0x009a, 3, "%s Control"),
1658 CONTROL_PORT(0x0582, 0x00b2, 0, "%s Control"),
1659 EXTERNAL_PORT(0x0582, 0x00b2, 1, "%s MIDI"),
1660 /* Cakewalk Sonar V-Studio 100 */
1661 EXTERNAL_PORT(0x0582, 0x00eb, 0, "%s MIDI"),
1662 CONTROL_PORT(0x0582, 0x00eb, 1, "%s Control"),
1664 CONTROL_PORT(0x0582, 0x0102, 0, "%s Control"),
1665 EXTERNAL_PORT(0x0582, 0x0102, 1, "%s MIDI"),
1667 EXTERNAL_PORT(0x0582, 0x010f, 0, "%s MIDI"),
1668 CONTROL_PORT(0x0582, 0x010f, 1, "%s 1"),
1669 CONTROL_PORT(0x0582, 0x010f, 2, "%s 2"),
1671 ROLAND_SYNTH_PORT(0x0582, 0x0114, 0, "%s Synth", 128),
1672 EXTERNAL_PORT(0x0582, 0x0114, 1, "%s MIDI"),
1673 CONTROL_PORT(0x0582, 0x0114, 2, "%s Control"),
1674 /* Roland OCTA-CAPTURE */
1675 EXTERNAL_PORT(0x0582, 0x0120, 0, "%s MIDI"),
1676 CONTROL_PORT(0x0582, 0x0120, 1, "%s Control"),
1677 EXTERNAL_PORT(0x0582, 0x0121, 0, "%s MIDI"),
1678 CONTROL_PORT(0x0582, 0x0121, 1, "%s Control"),
1680 CONTROL_PORT(0x0582, 0x0145, 0, "%s Control"),
1681 EXTERNAL_PORT(0x0582, 0x0145, 1, "%s MIDI"),
1682 /* Roland A-Series */
1683 CONTROL_PORT(0x0582, 0x0156, 0, "%s Keyboard"),
1684 EXTERNAL_PORT(0x0582, 0x0156, 1, "%s MIDI"),
1685 /* Roland INTEGRA-7 */
1686 ROLAND_SYNTH_PORT(0x0582, 0x015b, 0, "%s Synth", 128),
1687 CONTROL_PORT(0x0582, 0x015b, 1, "%s Control"),
1688 /* M-Audio MidiSport 8x8 */
1689 CONTROL_PORT(0x0763, 0x1031, 8, "%s Control"),
1690 CONTROL_PORT(0x0763, 0x1033, 8, "%s Control"),
1692 EXTERNAL_PORT(0x07fd, 0x0001, 0, "%s MIDI A"),
1693 EXTERNAL_PORT(0x07fd, 0x0001, 1, "%s MIDI B"),
1694 /* Emagic Unitor8/AMT8/MT4 */
1695 EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"),
1696 EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"),
1697 EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"),
1699 CONTROL_PORT(0x09e8, 0x0062, 0, "%s Control"),
1700 PORT_INFO(0x09e8, 0x0062, 1, "%s MIDI", 0,
1701 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1702 SNDRV_SEQ_PORT_TYPE_HARDWARE),
1703 /* Access Music Virus TI */
1704 EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"),
1705 PORT_INFO(0x133e, 0x0815, 1, "%s Synth", 0,
1706 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1707 SNDRV_SEQ_PORT_TYPE_HARDWARE |
1708 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER),
1711 static struct port_info *find_port_info(struct snd_usb_midi *umidi, int number)
1715 for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) {
1716 if (snd_usbmidi_port_info[i].id == umidi->usb_id &&
1717 snd_usbmidi_port_info[i].port == number)
1718 return &snd_usbmidi_port_info[i];
1723 static void snd_usbmidi_get_port_info(struct snd_rawmidi *rmidi, int number,
1724 struct snd_seq_port_info *seq_port_info)
1726 struct snd_usb_midi *umidi = rmidi->private_data;
1727 struct port_info *port_info;
1729 /* TODO: read port flags from descriptors */
1730 port_info = find_port_info(umidi, number);
1732 seq_port_info->type = port_info->seq_flags;
1733 seq_port_info->midi_voices = port_info->voices;
1737 static void snd_usbmidi_init_substream(struct snd_usb_midi *umidi,
1738 int stream, int number,
1739 struct snd_rawmidi_substream **rsubstream)
1741 struct port_info *port_info;
1742 const char *name_format;
1744 struct snd_rawmidi_substream *substream =
1745 snd_usbmidi_find_substream(umidi, stream, number);
1747 dev_err(&umidi->dev->dev, "substream %d:%d not found\n", stream,
1752 /* TODO: read port name from jack descriptor */
1753 port_info = find_port_info(umidi, number);
1754 name_format = port_info ? port_info->name : "%s MIDI %d";
1755 snprintf(substream->name, sizeof(substream->name),
1756 name_format, umidi->card->shortname, number + 1);
1758 *rsubstream = substream;
1762 * Creates the endpoints and their ports.
1764 static int snd_usbmidi_create_endpoints(struct snd_usb_midi *umidi,
1765 struct snd_usb_midi_endpoint_info *endpoints)
1768 int out_ports = 0, in_ports = 0;
1770 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1771 if (endpoints[i].out_cables) {
1772 err = snd_usbmidi_out_endpoint_create(umidi,
1774 &umidi->endpoints[i]);
1778 if (endpoints[i].in_cables) {
1779 err = snd_usbmidi_in_endpoint_create(umidi,
1781 &umidi->endpoints[i]);
1786 for (j = 0; j < 0x10; ++j) {
1787 if (endpoints[i].out_cables & (1 << j)) {
1788 snd_usbmidi_init_substream(umidi,
1789 SNDRV_RAWMIDI_STREAM_OUTPUT,
1791 &umidi->endpoints[i].out->ports[j].substream);
1794 if (endpoints[i].in_cables & (1 << j)) {
1795 snd_usbmidi_init_substream(umidi,
1796 SNDRV_RAWMIDI_STREAM_INPUT,
1798 &umidi->endpoints[i].in->ports[j].substream);
1803 dev_dbg(&umidi->dev->dev, "created %d output and %d input ports\n",
1804 out_ports, in_ports);
1808 static struct usb_ms_endpoint_descriptor *find_usb_ms_endpoint_descriptor(
1809 struct usb_host_endpoint *hostep)
1811 unsigned char *extra = hostep->extra;
1812 int extralen = hostep->extralen;
1814 while (extralen > 3) {
1815 struct usb_ms_endpoint_descriptor *ms_ep =
1816 (struct usb_ms_endpoint_descriptor *)extra;
1818 if (ms_ep->bLength > 3 &&
1819 ms_ep->bDescriptorType == USB_DT_CS_ENDPOINT &&
1820 ms_ep->bDescriptorSubtype == UAC_MS_GENERAL)
1824 extralen -= extra[0];
1831 * Returns MIDIStreaming device capabilities.
1833 static int snd_usbmidi_get_ms_info(struct snd_usb_midi *umidi,
1834 struct snd_usb_midi_endpoint_info *endpoints)
1836 struct usb_interface *intf;
1837 struct usb_host_interface *hostif;
1838 struct usb_interface_descriptor *intfd;
1839 struct usb_ms_header_descriptor *ms_header;
1840 struct usb_host_endpoint *hostep;
1841 struct usb_endpoint_descriptor *ep;
1842 struct usb_ms_endpoint_descriptor *ms_ep;
1845 intf = umidi->iface;
1848 hostif = &intf->altsetting[0];
1849 intfd = get_iface_desc(hostif);
1850 ms_header = (struct usb_ms_header_descriptor *)hostif->extra;
1851 if (hostif->extralen >= 7 &&
1852 ms_header->bLength >= 7 &&
1853 ms_header->bDescriptorType == USB_DT_CS_INTERFACE &&
1854 ms_header->bDescriptorSubtype == UAC_HEADER)
1855 dev_dbg(&umidi->dev->dev, "MIDIStreaming version %02x.%02x\n",
1856 ms_header->bcdMSC[1], ms_header->bcdMSC[0]);
1858 dev_warn(&umidi->dev->dev,
1859 "MIDIStreaming interface descriptor not found\n");
1862 for (i = 0; i < intfd->bNumEndpoints; ++i) {
1863 hostep = &hostif->endpoint[i];
1864 ep = get_ep_desc(hostep);
1865 if (!usb_endpoint_xfer_bulk(ep) && !usb_endpoint_xfer_int(ep))
1867 ms_ep = find_usb_ms_endpoint_descriptor(hostep);
1870 if (ms_ep->bLength <= sizeof(*ms_ep))
1872 if (ms_ep->bNumEmbMIDIJack > 0x10)
1874 if (ms_ep->bLength < sizeof(*ms_ep) + ms_ep->bNumEmbMIDIJack)
1876 if (usb_endpoint_dir_out(ep)) {
1877 if (endpoints[epidx].out_ep) {
1878 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1879 dev_warn(&umidi->dev->dev,
1880 "too many endpoints\n");
1884 endpoints[epidx].out_ep = usb_endpoint_num(ep);
1885 if (usb_endpoint_xfer_int(ep))
1886 endpoints[epidx].out_interval = ep->bInterval;
1887 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1889 * Low speed bulk transfers don't exist, so
1890 * force interrupt transfers for devices like
1891 * ESI MIDI Mate that try to use them anyway.
1893 endpoints[epidx].out_interval = 1;
1894 endpoints[epidx].out_cables =
1895 (1 << ms_ep->bNumEmbMIDIJack) - 1;
1896 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",
1897 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1899 if (endpoints[epidx].in_ep) {
1900 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1901 dev_warn(&umidi->dev->dev,
1902 "too many endpoints\n");
1906 endpoints[epidx].in_ep = usb_endpoint_num(ep);
1907 if (usb_endpoint_xfer_int(ep))
1908 endpoints[epidx].in_interval = ep->bInterval;
1909 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1910 endpoints[epidx].in_interval = 1;
1911 endpoints[epidx].in_cables =
1912 (1 << ms_ep->bNumEmbMIDIJack) - 1;
1913 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",
1914 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1920 static int roland_load_info(struct snd_kcontrol *kcontrol,
1921 struct snd_ctl_elem_info *info)
1923 static const char *const names[] = { "High Load", "Light Load" };
1925 return snd_ctl_enum_info(info, 1, 2, names);
1928 static int roland_load_get(struct snd_kcontrol *kcontrol,
1929 struct snd_ctl_elem_value *value)
1931 value->value.enumerated.item[0] = kcontrol->private_value;
1935 static int roland_load_put(struct snd_kcontrol *kcontrol,
1936 struct snd_ctl_elem_value *value)
1938 struct snd_usb_midi *umidi = kcontrol->private_data;
1941 if (value->value.enumerated.item[0] > 1)
1943 mutex_lock(&umidi->mutex);
1944 changed = value->value.enumerated.item[0] != kcontrol->private_value;
1946 kcontrol->private_value = value->value.enumerated.item[0];
1947 mutex_unlock(&umidi->mutex);
1951 static struct snd_kcontrol_new roland_load_ctl = {
1952 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1953 .name = "MIDI Input Mode",
1954 .info = roland_load_info,
1955 .get = roland_load_get,
1956 .put = roland_load_put,
1961 * On Roland devices, use the second alternate setting to be able to use
1962 * the interrupt input endpoint.
1964 static void snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi *umidi)
1966 struct usb_interface *intf;
1967 struct usb_host_interface *hostif;
1968 struct usb_interface_descriptor *intfd;
1970 intf = umidi->iface;
1971 if (!intf || intf->num_altsetting != 2)
1974 hostif = &intf->altsetting[1];
1975 intfd = get_iface_desc(hostif);
1976 /* If either or both of the endpoints support interrupt transfer,
1977 * then use the alternate setting
1979 if (intfd->bNumEndpoints != 2 ||
1980 !((get_endpoint(hostif, 0)->bmAttributes &
1981 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT ||
1982 (get_endpoint(hostif, 1)->bmAttributes &
1983 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT))
1986 dev_dbg(&umidi->dev->dev, "switching to altsetting %d with int ep\n",
1987 intfd->bAlternateSetting);
1988 usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
1989 intfd->bAlternateSetting);
1991 umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi);
1992 if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0)
1993 umidi->roland_load_ctl = NULL;
1997 * Try to find any usable endpoints in the interface.
1999 static int snd_usbmidi_detect_endpoints(struct snd_usb_midi *umidi,
2000 struct snd_usb_midi_endpoint_info *endpoint,
2003 struct usb_interface *intf;
2004 struct usb_host_interface *hostif;
2005 struct usb_interface_descriptor *intfd;
2006 struct usb_endpoint_descriptor *epd;
2007 int i, out_eps = 0, in_eps = 0;
2009 if (USB_ID_VENDOR(umidi->usb_id) == 0x0582)
2010 snd_usbmidi_switch_roland_altsetting(umidi);
2012 if (endpoint[0].out_ep || endpoint[0].in_ep)
2015 intf = umidi->iface;
2016 if (!intf || intf->num_altsetting < 1)
2018 hostif = intf->cur_altsetting;
2019 intfd = get_iface_desc(hostif);
2021 for (i = 0; i < intfd->bNumEndpoints; ++i) {
2022 epd = get_endpoint(hostif, i);
2023 if (!usb_endpoint_xfer_bulk(epd) &&
2024 !usb_endpoint_xfer_int(epd))
2026 if (out_eps < max_endpoints &&
2027 usb_endpoint_dir_out(epd)) {
2028 endpoint[out_eps].out_ep = usb_endpoint_num(epd);
2029 if (usb_endpoint_xfer_int(epd))
2030 endpoint[out_eps].out_interval = epd->bInterval;
2033 if (in_eps < max_endpoints &&
2034 usb_endpoint_dir_in(epd)) {
2035 endpoint[in_eps].in_ep = usb_endpoint_num(epd);
2036 if (usb_endpoint_xfer_int(epd))
2037 endpoint[in_eps].in_interval = epd->bInterval;
2041 return (out_eps || in_eps) ? 0 : -ENOENT;
2045 * Detects the endpoints for one-port-per-endpoint protocols.
2047 static int snd_usbmidi_detect_per_port_endpoints(struct snd_usb_midi *umidi,
2048 struct snd_usb_midi_endpoint_info *endpoints)
2052 err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS);
2053 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2054 if (endpoints[i].out_ep)
2055 endpoints[i].out_cables = 0x0001;
2056 if (endpoints[i].in_ep)
2057 endpoints[i].in_cables = 0x0001;
2063 * Detects the endpoints and ports of Yamaha devices.
2065 static int snd_usbmidi_detect_yamaha(struct snd_usb_midi *umidi,
2066 struct snd_usb_midi_endpoint_info *endpoint)
2068 struct usb_interface *intf;
2069 struct usb_host_interface *hostif;
2070 struct usb_interface_descriptor *intfd;
2073 intf = umidi->iface;
2076 hostif = intf->altsetting;
2077 intfd = get_iface_desc(hostif);
2078 if (intfd->bNumEndpoints < 1)
2082 * For each port there is one MIDI_IN/OUT_JACK descriptor, not
2083 * necessarily with any useful contents. So simply count 'em.
2085 for (cs_desc = hostif->extra;
2086 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
2087 cs_desc += cs_desc[0]) {
2088 if (cs_desc[1] == USB_DT_CS_INTERFACE) {
2089 if (cs_desc[2] == UAC_MIDI_IN_JACK)
2090 endpoint->in_cables =
2091 (endpoint->in_cables << 1) | 1;
2092 else if (cs_desc[2] == UAC_MIDI_OUT_JACK)
2093 endpoint->out_cables =
2094 (endpoint->out_cables << 1) | 1;
2097 if (!endpoint->in_cables && !endpoint->out_cables)
2100 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
2104 * Detects the endpoints and ports of Roland devices.
2106 static int snd_usbmidi_detect_roland(struct snd_usb_midi *umidi,
2107 struct snd_usb_midi_endpoint_info *endpoint)
2109 struct usb_interface *intf;
2110 struct usb_host_interface *hostif;
2113 intf = umidi->iface;
2116 hostif = intf->altsetting;
2118 * Some devices have a descriptor <06 24 F1 02 <inputs> <outputs>>,
2119 * some have standard class descriptors, or both kinds, or neither.
2121 for (cs_desc = hostif->extra;
2122 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
2123 cs_desc += cs_desc[0]) {
2124 if (cs_desc[0] >= 6 &&
2125 cs_desc[1] == USB_DT_CS_INTERFACE &&
2126 cs_desc[2] == 0xf1 &&
2127 cs_desc[3] == 0x02) {
2128 if (cs_desc[4] > 0x10 || cs_desc[5] > 0x10)
2130 endpoint->in_cables = (1 << cs_desc[4]) - 1;
2131 endpoint->out_cables = (1 << cs_desc[5]) - 1;
2132 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
2133 } else if (cs_desc[0] >= 7 &&
2134 cs_desc[1] == USB_DT_CS_INTERFACE &&
2135 cs_desc[2] == UAC_HEADER) {
2136 return snd_usbmidi_get_ms_info(umidi, endpoint);
2144 * Creates the endpoints and their ports for Midiman devices.
2146 static int snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi *umidi,
2147 struct snd_usb_midi_endpoint_info *endpoint)
2149 struct snd_usb_midi_endpoint_info ep_info;
2150 struct usb_interface *intf;
2151 struct usb_host_interface *hostif;
2152 struct usb_interface_descriptor *intfd;
2153 struct usb_endpoint_descriptor *epd;
2156 intf = umidi->iface;
2159 hostif = intf->altsetting;
2160 intfd = get_iface_desc(hostif);
2162 * The various MidiSport devices have more or less random endpoint
2163 * numbers, so we have to identify the endpoints by their index in
2164 * the descriptor array, like the driver for that other OS does.
2166 * There is one interrupt input endpoint for all input ports, one
2167 * bulk output endpoint for even-numbered ports, and one for odd-
2168 * numbered ports. Both bulk output endpoints have corresponding
2169 * input bulk endpoints (at indices 1 and 3) which aren't used.
2171 if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) {
2172 dev_dbg(&umidi->dev->dev, "not enough endpoints\n");
2176 epd = get_endpoint(hostif, 0);
2177 if (!usb_endpoint_dir_in(epd) || !usb_endpoint_xfer_int(epd)) {
2178 dev_dbg(&umidi->dev->dev, "endpoint[0] isn't interrupt\n");
2181 epd = get_endpoint(hostif, 2);
2182 if (!usb_endpoint_dir_out(epd) || !usb_endpoint_xfer_bulk(epd)) {
2183 dev_dbg(&umidi->dev->dev, "endpoint[2] isn't bulk output\n");
2186 if (endpoint->out_cables > 0x0001) {
2187 epd = get_endpoint(hostif, 4);
2188 if (!usb_endpoint_dir_out(epd) ||
2189 !usb_endpoint_xfer_bulk(epd)) {
2190 dev_dbg(&umidi->dev->dev,
2191 "endpoint[4] isn't bulk output\n");
2196 ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress &
2197 USB_ENDPOINT_NUMBER_MASK;
2198 ep_info.out_interval = 0;
2199 ep_info.out_cables = endpoint->out_cables & 0x5555;
2200 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info,
2201 &umidi->endpoints[0]);
2205 ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress &
2206 USB_ENDPOINT_NUMBER_MASK;
2207 ep_info.in_interval = get_endpoint(hostif, 0)->bInterval;
2208 ep_info.in_cables = endpoint->in_cables;
2209 err = snd_usbmidi_in_endpoint_create(umidi, &ep_info,
2210 &umidi->endpoints[0]);
2214 if (endpoint->out_cables > 0x0001) {
2215 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress &
2216 USB_ENDPOINT_NUMBER_MASK;
2217 ep_info.out_cables = endpoint->out_cables & 0xaaaa;
2218 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info,
2219 &umidi->endpoints[1]);
2224 for (cable = 0; cable < 0x10; ++cable) {
2225 if (endpoint->out_cables & (1 << cable))
2226 snd_usbmidi_init_substream(umidi,
2227 SNDRV_RAWMIDI_STREAM_OUTPUT,
2229 &umidi->endpoints[cable & 1].out->ports[cable].substream);
2230 if (endpoint->in_cables & (1 << cable))
2231 snd_usbmidi_init_substream(umidi,
2232 SNDRV_RAWMIDI_STREAM_INPUT,
2234 &umidi->endpoints[0].in->ports[cable].substream);
2239 static const struct snd_rawmidi_global_ops snd_usbmidi_ops = {
2240 .get_port_info = snd_usbmidi_get_port_info,
2243 static int snd_usbmidi_create_rawmidi(struct snd_usb_midi *umidi,
2244 int out_ports, int in_ports)
2246 struct snd_rawmidi *rmidi;
2249 err = snd_rawmidi_new(umidi->card, "USB MIDI",
2250 umidi->next_midi_device++,
2251 out_ports, in_ports, &rmidi);
2254 strcpy(rmidi->name, umidi->card->shortname);
2255 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
2256 SNDRV_RAWMIDI_INFO_INPUT |
2257 SNDRV_RAWMIDI_INFO_DUPLEX;
2258 rmidi->ops = &snd_usbmidi_ops;
2259 rmidi->private_data = umidi;
2260 rmidi->private_free = snd_usbmidi_rawmidi_free;
2261 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
2262 &snd_usbmidi_output_ops);
2263 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
2264 &snd_usbmidi_input_ops);
2266 umidi->rmidi = rmidi;
2271 * Temporarily stop input.
2273 void snd_usbmidi_input_stop(struct list_head *p)
2275 struct snd_usb_midi *umidi;
2278 umidi = list_entry(p, struct snd_usb_midi, list);
2279 if (!umidi->input_running)
2281 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2282 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
2284 for (j = 0; j < INPUT_URBS; ++j)
2285 usb_kill_urb(ep->in->urbs[j]);
2287 umidi->input_running = 0;
2289 EXPORT_SYMBOL(snd_usbmidi_input_stop);
2291 static void snd_usbmidi_input_start_ep(struct snd_usb_midi *umidi,
2292 struct snd_usb_midi_in_endpoint *ep)
2295 unsigned long flags;
2299 for (i = 0; i < INPUT_URBS; ++i) {
2300 struct urb *urb = ep->urbs[i];
2301 spin_lock_irqsave(&umidi->disc_lock, flags);
2302 if (!atomic_read(&urb->use_count)) {
2303 urb->dev = ep->umidi->dev;
2304 snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
2306 spin_unlock_irqrestore(&umidi->disc_lock, flags);
2311 * Resume input after a call to snd_usbmidi_input_stop().
2313 void snd_usbmidi_input_start(struct list_head *p)
2315 struct snd_usb_midi *umidi;
2318 umidi = list_entry(p, struct snd_usb_midi, list);
2319 if (umidi->input_running || !umidi->opened[1])
2321 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
2322 snd_usbmidi_input_start_ep(umidi, umidi->endpoints[i].in);
2323 umidi->input_running = 1;
2325 EXPORT_SYMBOL(snd_usbmidi_input_start);
2328 * Prepare for suspend. Typically called from the USB suspend callback.
2330 void snd_usbmidi_suspend(struct list_head *p)
2332 struct snd_usb_midi *umidi;
2334 umidi = list_entry(p, struct snd_usb_midi, list);
2335 mutex_lock(&umidi->mutex);
2336 snd_usbmidi_input_stop(p);
2337 mutex_unlock(&umidi->mutex);
2339 EXPORT_SYMBOL(snd_usbmidi_suspend);
2342 * Resume. Typically called from the USB resume callback.
2344 void snd_usbmidi_resume(struct list_head *p)
2346 struct snd_usb_midi *umidi;
2348 umidi = list_entry(p, struct snd_usb_midi, list);
2349 mutex_lock(&umidi->mutex);
2350 snd_usbmidi_input_start(p);
2351 mutex_unlock(&umidi->mutex);
2353 EXPORT_SYMBOL(snd_usbmidi_resume);
2356 * Creates and registers everything needed for a MIDI streaming interface.
2358 int __snd_usbmidi_create(struct snd_card *card,
2359 struct usb_interface *iface,
2360 struct list_head *midi_list,
2361 const struct snd_usb_audio_quirk *quirk,
2362 unsigned int usb_id)
2364 struct snd_usb_midi *umidi;
2365 struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS];
2366 int out_ports, in_ports;
2369 umidi = kzalloc(sizeof(*umidi), GFP_KERNEL);
2372 umidi->dev = interface_to_usbdev(iface);
2374 umidi->iface = iface;
2375 umidi->quirk = quirk;
2376 umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
2377 spin_lock_init(&umidi->disc_lock);
2378 init_rwsem(&umidi->disc_rwsem);
2379 mutex_init(&umidi->mutex);
2381 usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor),
2382 le16_to_cpu(umidi->dev->descriptor.idProduct));
2383 umidi->usb_id = usb_id;
2384 setup_timer(&umidi->error_timer, snd_usbmidi_error_timer,
2385 (unsigned long)umidi);
2387 /* detect the endpoint(s) to use */
2388 memset(endpoints, 0, sizeof(endpoints));
2389 switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) {
2390 case QUIRK_MIDI_STANDARD_INTERFACE:
2391 err = snd_usbmidi_get_ms_info(umidi, endpoints);
2392 if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */
2393 umidi->usb_protocol_ops =
2394 &snd_usbmidi_maudio_broken_running_status_ops;
2396 case QUIRK_MIDI_US122L:
2397 umidi->usb_protocol_ops = &snd_usbmidi_122l_ops;
2399 case QUIRK_MIDI_FIXED_ENDPOINT:
2400 memcpy(&endpoints[0], quirk->data,
2401 sizeof(struct snd_usb_midi_endpoint_info));
2402 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2404 case QUIRK_MIDI_YAMAHA:
2405 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]);
2407 case QUIRK_MIDI_ROLAND:
2408 err = snd_usbmidi_detect_roland(umidi, &endpoints[0]);
2410 case QUIRK_MIDI_MIDIMAN:
2411 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
2412 memcpy(&endpoints[0], quirk->data,
2413 sizeof(struct snd_usb_midi_endpoint_info));
2416 case QUIRK_MIDI_NOVATION:
2417 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
2418 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2420 case QUIRK_MIDI_RAW_BYTES:
2421 umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;
2423 * Interface 1 contains isochronous endpoints, but with the same
2424 * numbers as in interface 0. Since it is interface 1 that the
2425 * USB core has most recently seen, these descriptors are now
2426 * associated with the endpoint numbers. This will foul up our
2427 * attempts to submit bulk/interrupt URBs to the endpoints in
2428 * interface 0, so we have to make sure that the USB core looks
2429 * again at interface 0 by calling usb_set_interface() on it.
2431 if (umidi->usb_id == USB_ID(0x07fd, 0x0001)) /* MOTU Fastlane */
2432 usb_set_interface(umidi->dev, 0, 0);
2433 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2435 case QUIRK_MIDI_EMAGIC:
2436 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops;
2437 memcpy(&endpoints[0], quirk->data,
2438 sizeof(struct snd_usb_midi_endpoint_info));
2439 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2441 case QUIRK_MIDI_CME:
2442 umidi->usb_protocol_ops = &snd_usbmidi_cme_ops;
2443 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2445 case QUIRK_MIDI_AKAI:
2446 umidi->usb_protocol_ops = &snd_usbmidi_akai_ops;
2447 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2448 /* endpoint 1 is input-only */
2449 endpoints[1].out_cables = 0;
2451 case QUIRK_MIDI_FTDI:
2452 umidi->usb_protocol_ops = &snd_usbmidi_ftdi_ops;
2454 /* set baud rate to 31250 (48 MHz / 16 / 96) */
2455 err = usb_control_msg(umidi->dev, usb_sndctrlpipe(umidi->dev, 0),
2456 3, 0x40, 0x60, 0, NULL, 0, 1000);
2460 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2462 case QUIRK_MIDI_CH345:
2463 umidi->usb_protocol_ops = &snd_usbmidi_ch345_broken_sysex_ops;
2464 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2467 dev_err(&umidi->dev->dev, "invalid quirk type %d\n",
2477 /* create rawmidi device */
2480 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2481 out_ports += hweight16(endpoints[i].out_cables);
2482 in_ports += hweight16(endpoints[i].in_cables);
2484 err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports);
2490 /* create endpoint/port structures */
2491 if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN)
2492 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]);
2494 err = snd_usbmidi_create_endpoints(umidi, endpoints);
2499 usb_autopm_get_interface_no_resume(umidi->iface);
2501 list_add_tail(&umidi->list, midi_list);
2504 EXPORT_SYMBOL(__snd_usbmidi_create);