1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Universal MIDI Packet (UMP) support
4 */
5
6 #include <linux/list.h>
7 #include <linux/slab.h>
8 #include <linux/module.h>
9 #include <linux/export.h>
10 #include <linux/mm.h>
11 #include <sound/core.h>
12 #include <sound/rawmidi.h>
13 #include <sound/ump.h>
14 #include <sound/ump_convert.h>
15
16 #define ump_err(ump, fmt, args...) dev_err((ump)->core.dev, fmt, ##args)
17 #define ump_warn(ump, fmt, args...) dev_warn((ump)->core.dev, fmt, ##args)
18 #define ump_info(ump, fmt, args...) dev_info((ump)->core.dev, fmt, ##args)
19 #define ump_dbg(ump, fmt, args...) dev_dbg((ump)->core.dev, fmt, ##args)
20
21 static int snd_ump_dev_register(struct snd_rawmidi *rmidi);
22 static int snd_ump_dev_unregister(struct snd_rawmidi *rmidi);
23 static long snd_ump_ioctl(struct snd_rawmidi *rmidi, unsigned int cmd,
24 void __user *argp);
25 static void snd_ump_proc_read(struct snd_info_entry *entry,
26 struct snd_info_buffer *buffer);
27 static int snd_ump_rawmidi_open(struct snd_rawmidi_substream *substream);
28 static int snd_ump_rawmidi_close(struct snd_rawmidi_substream *substream);
29 static void snd_ump_rawmidi_trigger(struct snd_rawmidi_substream *substream,
30 int up);
31 static void snd_ump_rawmidi_drain(struct snd_rawmidi_substream *substream);
32
33 static void ump_handle_stream_msg(struct snd_ump_endpoint *ump,
34 const u32 *buf, int size);
35 #if IS_ENABLED(CONFIG_SND_UMP_LEGACY_RAWMIDI)
36 static int process_legacy_output(struct snd_ump_endpoint *ump,
37 u32 *buffer, int count);
38 static void process_legacy_input(struct snd_ump_endpoint *ump, const u32 *src,
39 int words);
40 #else
41 static inline int process_legacy_output(struct snd_ump_endpoint *ump,
42 u32 *buffer, int count)
43 {
44 return 0;
45 }
46 static inline void process_legacy_input(struct snd_ump_endpoint *ump,
47 const u32 *src, int words)
48 {
49 }
50 #endif
51
52 static const struct snd_rawmidi_global_ops snd_ump_rawmidi_ops = {
53 .dev_register = snd_ump_dev_register,
54 .dev_unregister = snd_ump_dev_unregister,
55 .ioctl = snd_ump_ioctl,
56 .proc_read = snd_ump_proc_read,
57 };
58
59 static const struct snd_rawmidi_ops snd_ump_rawmidi_input_ops = {
60 .open = snd_ump_rawmidi_open,
61 .close = snd_ump_rawmidi_close,
62 .trigger = snd_ump_rawmidi_trigger,
63 };
64
65 static const struct snd_rawmidi_ops snd_ump_rawmidi_output_ops = {
66 .open = snd_ump_rawmidi_open,
67 .close = snd_ump_rawmidi_close,
68 .trigger = snd_ump_rawmidi_trigger,
69 .drain = snd_ump_rawmidi_drain,
70 };
71
72 static void snd_ump_endpoint_free(struct snd_rawmidi *rmidi)
73 {
74 struct snd_ump_endpoint *ump = rawmidi_to_ump(rmidi);
75 struct snd_ump_block *fb;
76
77 while (!list_empty(&ump->block_list)) {
78 fb = list_first_entry(&ump->block_list, struct snd_ump_block,
79 list);
80 list_del(&fb->list);
81 if (fb->private_free)
82 fb->private_free(fb);
83 kfree(fb);
84 }
85
86 if (ump->private_free)
87 ump->private_free(ump);
88
89 #if IS_ENABLED(CONFIG_SND_UMP_LEGACY_RAWMIDI)
90 kfree(ump->out_cvts);
91 #endif
92 }
93
94 /**
95 * snd_ump_endpoint_new - create a UMP Endpoint object
96 * @card: the card instance
97 * @id: the id string for rawmidi
98 * @device: the device index for rawmidi
99 * @output: 1 for enabling output
100 * @input: 1 for enabling input
101 * @ump_ret: the pointer to store the new UMP instance
102 *
103 * Creates a new UMP Endpoint object. A UMP Endpoint is tied with one rawmidi
104 * instance with one input and/or one output rawmidi stream (either uni-
105 * or bi-directional). A UMP Endpoint may contain one or multiple UMP Blocks
106 * that consist of one or multiple UMP Groups.
107 *
108 * Use snd_rawmidi_set_ops() to set the operators to the new instance.
109 * Unlike snd_rawmidi_new(), this function sets up the info_flags by itself
110 * depending on the given @output and @input.
111 *
112 * The device has SNDRV_RAWMIDI_INFO_UMP flag set and a different device
113 * file ("umpCxDx") than a standard MIDI 1.x device ("midiCxDx") is
114 * created.
115 *
116 * Return: Zero if successful, or a negative error code on failure.
117 */
118 int snd_ump_endpoint_new(struct snd_card *card, char *id, int device,
119 int output, int input,
120 struct snd_ump_endpoint **ump_ret)
121 {
122 unsigned int info_flags = SNDRV_RAWMIDI_INFO_UMP;
123 struct snd_ump_endpoint *ump;
124 int err;
125
126 if (input)
127 info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
128 if (output)
129 info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
130 if (input && output)
131 info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
132
133 ump = kzalloc(sizeof(*ump), GFP_KERNEL);
134 if (!ump)
135 return -ENOMEM;
136 INIT_LIST_HEAD(&ump->block_list);
137 mutex_init(&ump->open_mutex);
138 init_waitqueue_head(&ump->stream_wait);
139 #if IS_ENABLED(CONFIG_SND_UMP_LEGACY_RAWMIDI)
140 spin_lock_init(&ump->legacy_locks[0]);
141 spin_lock_init(&ump->legacy_locks[1]);
142 #endif
143 err = snd_rawmidi_init(&ump->core, card, id, device,
144 output, input, info_flags);
145 if (err < 0) {
146 snd_rawmidi_free(&ump->core);
147 return err;
148 }
149
150 ump->info.card = card->number;
151 ump->info.device = device;
152
153 ump->core.private_free = snd_ump_endpoint_free;
154 ump->core.ops = &snd_ump_rawmidi_ops;
155 if (input)
156 snd_rawmidi_set_ops(&ump->core, SNDRV_RAWMIDI_STREAM_INPUT,
157 &snd_ump_rawmidi_input_ops);
158 if (output)
159 snd_rawmidi_set_ops(&ump->core, SNDRV_RAWMIDI_STREAM_OUTPUT,
160 &snd_ump_rawmidi_output_ops);
161
162 ump_dbg(ump, "Created a UMP EP #%d (%s)\n", device, id);
163 *ump_ret = ump;
164 return 0;
165 }
166 EXPORT_SYMBOL_GPL(snd_ump_endpoint_new);
167
168 /*
169 * Device register / unregister hooks;
170 * do nothing, placeholders for avoiding the default rawmidi handling
171 */
172
173 #if IS_ENABLED(CONFIG_SND_SEQUENCER)
174 static void snd_ump_dev_seq_free(struct snd_seq_device *device)
175 {
176 struct snd_ump_endpoint *ump = device->private_data;
177
178 ump->seq_dev = NULL;
179 }
180 #endif
181
182 static int snd_ump_dev_register(struct snd_rawmidi *rmidi)
183 {
184 #if IS_ENABLED(CONFIG_SND_SEQUENCER)
185 struct snd_ump_endpoint *ump = rawmidi_to_ump(rmidi);
186 int err;
187
188 err = snd_seq_device_new(ump->core.card, ump->core.device,
189 SNDRV_SEQ_DEV_ID_UMP, 0, &ump->seq_dev);
190 if (err < 0)
191 return err;
192 ump->seq_dev->private_data = ump;
193 ump->seq_dev->private_free = snd_ump_dev_seq_free;
194 snd_device_register(ump->core.card, ump->seq_dev);
195 #endif
196 return 0;
197 }
198
199 static int snd_ump_dev_unregister(struct snd_rawmidi *rmidi)
200 {
201 return 0;
202 }
203
204 static struct snd_ump_block *
205 snd_ump_get_block(struct snd_ump_endpoint *ump, unsigned char id)
206 {
207 struct snd_ump_block *fb;
208
209 list_for_each_entry(fb, &ump->block_list, list) {
210 if (fb->info.block_id == id)
211 return fb;
212 }
213 return NULL;
214 }
215
216 /*
217 * rawmidi ops for UMP endpoint
218 */
219 static int snd_ump_rawmidi_open(struct snd_rawmidi_substream *substream)
220 {
221 struct snd_ump_endpoint *ump = rawmidi_to_ump(substream->rmidi);
222 int dir = substream->stream;
223 int err;
224
225 if (ump->substreams[dir])
226 return -EBUSY;
227 err = ump->ops->open(ump, dir);
228 if (err < 0)
229 return err;
230 ump->substreams[dir] = substream;
231 return 0;
232 }
233
234 static int snd_ump_rawmidi_close(struct snd_rawmidi_substream *substream)
235 {
236 struct snd_ump_endpoint *ump = rawmidi_to_ump(substream->rmidi);
237 int dir = substream->stream;
238
239 ump->substreams[dir] = NULL;
240 ump->ops->close(ump, dir);
241 return 0;
242 }
243
244 static void snd_ump_rawmidi_trigger(struct snd_rawmidi_substream *substream,
245 int up)
246 {
247 struct snd_ump_endpoint *ump = rawmidi_to_ump(substream->rmidi);
248 int dir = substream->stream;
249
250 ump->ops->trigger(ump, dir, up);
251 }
252
253 static void snd_ump_rawmidi_drain(struct snd_rawmidi_substream *substream)
254 {
255 struct snd_ump_endpoint *ump = rawmidi_to_ump(substream->rmidi);
256
257 if (ump->ops->drain)
258 ump->ops->drain(ump, SNDRV_RAWMIDI_STREAM_OUTPUT);
259 }
260
261 /* number of 32bit words per message type */
262 static unsigned char ump_packet_words[0x10] = {
263 1, 1, 1, 2, 2, 4, 1, 1, 2, 2, 2, 3, 3, 4, 4, 4
264 };
265
266 /**
267 * snd_ump_receive_ump_val - parse the UMP packet data
268 * @ump: UMP endpoint
269 * @val: UMP packet data
270 *
271 * The data is copied onto ump->input_buf[].
272 * When a full packet is completed, returns the number of words (from 1 to 4).
273 * OTOH, if the packet is incomplete, returns 0.
274 */
275 int snd_ump_receive_ump_val(struct snd_ump_endpoint *ump, u32 val)
276 {
277 int words;
278
279 if (!ump->input_pending)
280 ump->input_pending = ump_packet_words[ump_message_type(val)];
281
282 ump->input_buf[ump->input_buf_head++] = val;
283 ump->input_pending--;
284 if (!ump->input_pending) {
285 words = ump->input_buf_head;
286 ump->input_buf_head = 0;
287 return words;
288 }
289 return 0;
290 }
291 EXPORT_SYMBOL_GPL(snd_ump_receive_ump_val);
292
293 /**
294 * snd_ump_receive - transfer UMP packets from the device
295 * @ump: the UMP endpoint
296 * @buffer: the buffer pointer to transfer
297 * @count: byte size to transfer
298 *
299 * Called from the driver to submit the received UMP packets from the device
300 * to user-space. It's essentially a wrapper of rawmidi_receive().
301 * The data to receive is in CPU-native endianness.
302 */
303 int snd_ump_receive(struct snd_ump_endpoint *ump, const u32 *buffer, int count)
304 {
305 struct snd_rawmidi_substream *substream;
306 const u32 *p = buffer;
307 int n, words = count >> 2;
308
309 while (words--) {
310 n = snd_ump_receive_ump_val(ump, *p++);
311 if (!n)
312 continue;
313 ump_handle_stream_msg(ump, ump->input_buf, n);
314 #if IS_ENABLED(CONFIG_SND_SEQUENCER)
315 if (ump->seq_ops)
316 ump->seq_ops->input_receive(ump, ump->input_buf, n);
317 #endif
318 process_legacy_input(ump, ump->input_buf, n);
319 }
320
321 substream = ump->substreams[SNDRV_RAWMIDI_STREAM_INPUT];
322 if (!substream)
323 return 0;
324 return snd_rawmidi_receive(substream, (const char *)buffer, count);
325 }
326 EXPORT_SYMBOL_GPL(snd_ump_receive);
327
328 /**
329 * snd_ump_transmit - transmit UMP packets
330 * @ump: the UMP endpoint
331 * @buffer: the buffer pointer to transfer
332 * @count: byte size to transfer
333 *
334 * Called from the driver to obtain the UMP packets from user-space to the
335 * device. It's essentially a wrapper of rawmidi_transmit().
336 * The data to transmit is in CPU-native endianness.
337 */
338 int snd_ump_transmit(struct snd_ump_endpoint *ump, u32 *buffer, int count)
339 {
340 struct snd_rawmidi_substream *substream =
341 ump->substreams[SNDRV_RAWMIDI_STREAM_OUTPUT];
342 int err;
343
344 if (!substream)
345 return -ENODEV;
346 err = snd_rawmidi_transmit(substream, (char *)buffer, count);
347 /* received either data or an error? */
348 if (err)
349 return err;
350 return process_legacy_output(ump, buffer, count);
351 }
352 EXPORT_SYMBOL_GPL(snd_ump_transmit);
353
354 /**
355 * snd_ump_block_new - Create a UMP block
356 * @ump: UMP object
357 * @blk: block ID number to create
358 * @direction: direction (in/out/bidirection)
359 * @first_group: the first group ID (0-based)
360 * @num_groups: the number of groups in this block
361 * @blk_ret: the pointer to store the resultant block object
362 */
363 int snd_ump_block_new(struct snd_ump_endpoint *ump, unsigned int blk,
364 unsigned int direction, unsigned int first_group,
365 unsigned int num_groups, struct snd_ump_block **blk_ret)
366 {
367 struct snd_ump_block *fb, *p;
368
369 if (blk < 0 || blk >= SNDRV_UMP_MAX_BLOCKS)
370 return -EINVAL;
371
372 if (snd_ump_get_block(ump, blk))
373 return -EBUSY;
374
375 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
376 if (!fb)
377 return -ENOMEM;
378
379 fb->ump = ump;
380 fb->info.card = ump->info.card;
381 fb->info.device = ump->info.device;
382 fb->info.block_id = blk;
383 if (blk >= ump->info.num_blocks)
384 ump->info.num_blocks = blk + 1;
385 fb->info.direction = direction;
386 fb->info.active = 1;
387 fb->info.first_group = first_group;
388 fb->info.num_groups = num_groups;
389 /* fill the default name, may be overwritten to a better name */
390 snprintf(fb->info.name, sizeof(fb->info.name), "Group %d-%d",
391 first_group + 1, first_group + num_groups);
392
393 /* put the entry in the ordered list */
394 list_for_each_entry(p, &ump->block_list, list) {
395 if (p->info.block_id > blk) {
396 list_add_tail(&fb->list, &p->list);
397 goto added;
398 }
399 }
400 list_add_tail(&fb->list, &ump->block_list);
401
402 added:
403 ump_dbg(ump, "Created a UMP Block #%d (%s)\n", blk, fb->info.name);
404 *blk_ret = fb;
405 return 0;
406 }
407 EXPORT_SYMBOL_GPL(snd_ump_block_new);
408
409 static int snd_ump_ioctl_block(struct snd_ump_endpoint *ump,
410 struct snd_ump_block_info __user *argp)
411 {
412 struct snd_ump_block *fb;
413 unsigned char id;
414
415 if (get_user(id, &argp->block_id))
416 return -EFAULT;
417 fb = snd_ump_get_block(ump, id);
418 if (!fb)
419 return -ENOENT;
420 if (copy_to_user(argp, &fb->info, sizeof(fb->info)))
421 return -EFAULT;
422 return 0;
423 }
424
425 /*
426 * Handle UMP-specific ioctls; called from snd_rawmidi_ioctl()
427 */
428 static long snd_ump_ioctl(struct snd_rawmidi *rmidi, unsigned int cmd,
429 void __user *argp)
430 {
431 struct snd_ump_endpoint *ump = rawmidi_to_ump(rmidi);
432
433 switch (cmd) {
434 case SNDRV_UMP_IOCTL_ENDPOINT_INFO:
435 if (copy_to_user(argp, &ump->info, sizeof(ump->info)))
436 return -EFAULT;
437 return 0;
438 case SNDRV_UMP_IOCTL_BLOCK_INFO:
439 return snd_ump_ioctl_block(ump, argp);
440 default:
441 ump_dbg(ump, "rawmidi: unknown command = 0x%x\n", cmd);
442 return -ENOTTY;
443 }
444 }
445
446 static const char *ump_direction_string(int dir)
447 {
448 switch (dir) {
449 case SNDRV_UMP_DIR_INPUT:
450 return "input";
451 case SNDRV_UMP_DIR_OUTPUT:
452 return "output";
453 case SNDRV_UMP_DIR_BIDIRECTION:
454 return "bidirection";
455 default:
456 return "unknown";
457 }
458 }
459
460 static const char *ump_ui_hint_string(int dir)
461 {
462 switch (dir) {
463 case SNDRV_UMP_BLOCK_UI_HINT_RECEIVER:
464 return "receiver";
465 case SNDRV_UMP_BLOCK_UI_HINT_SENDER:
466 return "sender";
467 case SNDRV_UMP_BLOCK_UI_HINT_BOTH:
468 return "both";
469 default:
470 return "unknown";
471 }
472 }
473
474 /* Additional proc file output */
475 static void snd_ump_proc_read(struct snd_info_entry *entry,
476 struct snd_info_buffer *buffer)
477 {
478 struct snd_rawmidi *rmidi = entry->private_data;
479 struct snd_ump_endpoint *ump = rawmidi_to_ump(rmidi);
480 struct snd_ump_block *fb;
481
482 snd_iprintf(buffer, "EP Name: %s\n", ump->info.name);
483 snd_iprintf(buffer, "EP Product ID: %s\n", ump->info.product_id);
484 snd_iprintf(buffer, "UMP Version: 0x%04x\n", ump->info.version);
485 snd_iprintf(buffer, "Protocol Caps: 0x%08x\n", ump->info.protocol_caps);
486 snd_iprintf(buffer, "Protocol: 0x%08x\n", ump->info.protocol);
487 if (ump->info.version) {
488 snd_iprintf(buffer, "Manufacturer ID: 0x%08x\n",
489 ump->info.manufacturer_id);
490 snd_iprintf(buffer, "Family ID: 0x%04x\n", ump->info.family_id);
491 snd_iprintf(buffer, "Model ID: 0x%04x\n", ump->info.model_id);
492 snd_iprintf(buffer, "SW Revision: 0x%02x%02x%02x%02x\n",
493 ump->info.sw_revision[0],
494 ump->info.sw_revision[1],
495 ump->info.sw_revision[2],
496 ump->info.sw_revision[3]);
497 }
498 snd_iprintf(buffer, "Static Blocks: %s\n",
499 (ump->info.flags & SNDRV_UMP_EP_INFO_STATIC_BLOCKS) ? "Yes" : "No");
500 snd_iprintf(buffer, "Num Blocks: %d\n\n", ump->info.num_blocks);
501
502 list_for_each_entry(fb, &ump->block_list, list) {
503 snd_iprintf(buffer, "Block %d (%s)\n", fb->info.block_id,
504 fb->info.name);
505 snd_iprintf(buffer, " Direction: %s\n",
506 ump_direction_string(fb->info.direction));
507 snd_iprintf(buffer, " Active: %s\n",
508 fb->info.active ? "Yes" : "No");
509 snd_iprintf(buffer, " Groups: %d-%d\n",
510 fb->info.first_group + 1,
511 fb->info.first_group + fb->info.num_groups);
512 snd_iprintf(buffer, " Is MIDI1: %s%s\n",
513 (fb->info.flags & SNDRV_UMP_BLOCK_IS_MIDI1) ? "Yes" : "No",
514 (fb->info.flags & SNDRV_UMP_BLOCK_IS_LOWSPEED) ? " (Low Speed)" : "");
515 if (ump->info.version) {
516 snd_iprintf(buffer, " MIDI-CI Version: %d\n",
517 fb->info.midi_ci_version);
518 snd_iprintf(buffer, " Sysex8 Streams: %d\n",
519 fb->info.sysex8_streams);
520 snd_iprintf(buffer, " UI Hint: %s\n",
521 ump_ui_hint_string(fb->info.ui_hint));
522 }
523 snd_iprintf(buffer, "\n");
524 }
525 }
526
527 /*
528 * UMP endpoint and function block handling
529 */
530
531 /* open / close UMP streams for the internal stream msg communication */
532 static int ump_request_open(struct snd_ump_endpoint *ump)
533 {
534 return snd_rawmidi_kernel_open(&ump->core, 0,
535 SNDRV_RAWMIDI_LFLG_OUTPUT,
536 &ump->stream_rfile);
537 }
538
539 static void ump_request_close(struct snd_ump_endpoint *ump)
540 {
541 snd_rawmidi_kernel_release(&ump->stream_rfile);
542 }
543
544 /* request a command and wait for the given response;
545 * @req1 and @req2 are u32 commands
546 * @reply is the expected UMP stream status
547 */
548 static int ump_req_msg(struct snd_ump_endpoint *ump, u32 req1, u32 req2,
549 u32 reply)
550 {
551 u32 buf[4];
552
553 ump_dbg(ump, "%s: request %08x %08x, wait-for %08x\n",
554 __func__, req1, req2, reply);
555 memset(buf, 0, sizeof(buf));
556 buf[0] = req1;
557 buf[1] = req2;
558 ump->stream_finished = 0;
559 ump->stream_wait_for = reply;
560 snd_rawmidi_kernel_write(ump->stream_rfile.output,
561 (unsigned char *)&buf, 16);
562 wait_event_timeout(ump->stream_wait, ump->stream_finished,
563 msecs_to_jiffies(500));
564 if (!READ_ONCE(ump->stream_finished)) {
565 ump_dbg(ump, "%s: request timed out\n", __func__);
566 return -ETIMEDOUT;
567 }
568 ump->stream_finished = 0;
569 ump_dbg(ump, "%s: reply: %08x %08x %08x %08x\n",
570 __func__, buf[0], buf[1], buf[2], buf[3]);
571 return 0;
572 }
573
574 /* append the received letters via UMP packet to the given string buffer;
575 * return 1 if the full string is received or 0 to continue
576 */
577 static int ump_append_string(struct snd_ump_endpoint *ump, char *dest,
578 int maxsize, const u32 *buf, int offset)
579 {
580 unsigned char format;
581 int c;
582
583 format = ump_stream_message_format(buf[0]);
584 if (format == UMP_STREAM_MSG_FORMAT_SINGLE ||
585 format == UMP_STREAM_MSG_FORMAT_START) {
586 c = 0;
587 } else {
588 c = strlen(dest);
589 if (c >= maxsize - 1)
590 return 1;
591 }
592
593 for (; offset < 16; offset++) {
594 dest[c] = buf[offset / 4] >> (3 - (offset % 4)) * 8;
595 if (!dest[c])
596 break;
597 if (++c >= maxsize - 1)
598 break;
599 }
600 dest[c] = 0;
601 return (format == UMP_STREAM_MSG_FORMAT_SINGLE ||
602 format == UMP_STREAM_MSG_FORMAT_END);
603 }
604
605 /* handle EP info stream message; update the UMP attributes */
606 static int ump_handle_ep_info_msg(struct snd_ump_endpoint *ump,
607 const union snd_ump_stream_msg *buf)
608 {
609 ump->info.version = (buf->ep_info.ump_version_major << 8) |
610 buf->ep_info.ump_version_minor;
611 ump->info.num_blocks = buf->ep_info.num_function_blocks;
612 if (ump->info.num_blocks > SNDRV_UMP_MAX_BLOCKS) {
613 ump_info(ump, "Invalid function blocks %d, fallback to 1\n",
614 ump->info.num_blocks);
615 ump->info.num_blocks = 1;
616 }
617
618 if (buf->ep_info.static_function_block)
619 ump->info.flags |= SNDRV_UMP_EP_INFO_STATIC_BLOCKS;
620
621 ump->info.protocol_caps = (buf->ep_info.protocol << 8) |
622 buf->ep_info.jrts;
623
624 ump_dbg(ump, "EP info: version=%x, num_blocks=%x, proto_caps=%x\n",
625 ump->info.version, ump->info.num_blocks, ump->info.protocol_caps);
626 return 1; /* finished */
627 }
628
629 /* handle EP device info stream message; update the UMP attributes */
630 static int ump_handle_device_info_msg(struct snd_ump_endpoint *ump,
631 const union snd_ump_stream_msg *buf)
632 {
633 ump->info.manufacturer_id = buf->device_info.manufacture_id & 0x7f7f7f;
634 ump->info.family_id = (buf->device_info.family_msb << 8) |
635 buf->device_info.family_lsb;
636 ump->info.model_id = (buf->device_info.model_msb << 8) |
637 buf->device_info.model_lsb;
638 ump->info.sw_revision[0] = (buf->device_info.sw_revision >> 24) & 0x7f;
639 ump->info.sw_revision[1] = (buf->device_info.sw_revision >> 16) & 0x7f;
640 ump->info.sw_revision[2] = (buf->device_info.sw_revision >> 8) & 0x7f;
641 ump->info.sw_revision[3] = buf->device_info.sw_revision & 0x7f;
642 ump_dbg(ump, "EP devinfo: manid=%08x, family=%04x, model=%04x, sw=%02x%02x%02x%02x\n",
643 ump->info.manufacturer_id,
644 ump->info.family_id,
645 ump->info.model_id,
646 ump->info.sw_revision[0],
647 ump->info.sw_revision[1],
648 ump->info.sw_revision[2],
649 ump->info.sw_revision[3]);
650 return 1; /* finished */
651 }
652
653 /* handle EP name stream message; update the UMP name string */
654 static int ump_handle_ep_name_msg(struct snd_ump_endpoint *ump,
655 const union snd_ump_stream_msg *buf)
656 {
657 return ump_append_string(ump, ump->info.name, sizeof(ump->info.name),
658 buf->raw, 2);
659 }
660
661 /* handle EP product id stream message; update the UMP product_id string */
662 static int ump_handle_product_id_msg(struct snd_ump_endpoint *ump,
663 const union snd_ump_stream_msg *buf)
664 {
665 return ump_append_string(ump, ump->info.product_id,
666 sizeof(ump->info.product_id),
667 buf->raw, 2);
668 }
669
670 /* notify the protocol change to sequencer */
671 static void seq_notify_protocol(struct snd_ump_endpoint *ump)
672 {
673 #if IS_ENABLED(CONFIG_SND_SEQUENCER)
674 if (ump->seq_ops && ump->seq_ops->switch_protocol)
675 ump->seq_ops->switch_protocol(ump);
676 #endif /* CONFIG_SND_SEQUENCER */
677 }
678
679 /**
680 * snd_ump_switch_protocol - switch MIDI protocol
681 * @ump: UMP endpoint
682 * @protocol: protocol to switch to
683 *
684 * Returns 1 if the protocol is actually switched, 0 if unchanged
685 */
686 int snd_ump_switch_protocol(struct snd_ump_endpoint *ump, unsigned int protocol)
687 {
688 unsigned int type;
689
690 protocol &= ump->info.protocol_caps;
691 if (protocol == ump->info.protocol)
692 return 0;
693
694 type = protocol & SNDRV_UMP_EP_INFO_PROTO_MIDI_MASK;
695 if (type != SNDRV_UMP_EP_INFO_PROTO_MIDI1 &&
696 type != SNDRV_UMP_EP_INFO_PROTO_MIDI2)
697 return 0;
698
699 ump->info.protocol = protocol;
700 ump_dbg(ump, "New protocol = %x (caps = %x)\n",
701 protocol, ump->info.protocol_caps);
702 seq_notify_protocol(ump);
703 return 1;
704 }
705 EXPORT_SYMBOL_GPL(snd_ump_switch_protocol);
706
707 /* handle EP stream config message; update the UMP protocol */
708 static int ump_handle_stream_cfg_msg(struct snd_ump_endpoint *ump,
709 const union snd_ump_stream_msg *buf)
710 {
711 unsigned int protocol =
712 (buf->stream_cfg.protocol << 8) | buf->stream_cfg.jrts;
713
714 snd_ump_switch_protocol(ump, protocol);
715 return 1; /* finished */
716 }
717
718 /* Extract Function Block info from UMP packet */
719 static void fill_fb_info(struct snd_ump_endpoint *ump,
720 struct snd_ump_block_info *info,
721 const union snd_ump_stream_msg *buf)
722 {
723 info->direction = buf->fb_info.direction;
724 info->ui_hint = buf->fb_info.ui_hint;
725 info->first_group = buf->fb_info.first_group;
726 info->num_groups = buf->fb_info.num_groups;
727 info->flags = buf->fb_info.midi_10;
728 info->active = buf->fb_info.active;
729 info->midi_ci_version = buf->fb_info.midi_ci_version;
730 info->sysex8_streams = buf->fb_info.sysex8_streams;
731
732 ump_dbg(ump, "FB %d: dir=%d, active=%d, first_gp=%d, num_gp=%d, midici=%d, sysex8=%d, flags=0x%x\n",
733 info->block_id, info->direction, info->active,
734 info->first_group, info->num_groups, info->midi_ci_version,
735 info->sysex8_streams, info->flags);
736
737 if ((info->flags & SNDRV_UMP_BLOCK_IS_MIDI1) && info->num_groups != 1) {
738 info->num_groups = 1;
739 ump_dbg(ump, "FB %d: corrected groups to 1 for MIDI1\n",
740 info->block_id);
741 }
742 }
743
744 /* check whether the FB info gets updated by the current message */
745 static bool is_fb_info_updated(struct snd_ump_endpoint *ump,
746 struct snd_ump_block *fb,
747 const union snd_ump_stream_msg *buf)
748 {
749 char tmpbuf[offsetof(struct snd_ump_block_info, name)];
750
751 if (ump->info.flags & SNDRV_UMP_EP_INFO_STATIC_BLOCKS) {
752 ump_info(ump, "Skipping static FB info update (blk#%d)\n",
753 fb->info.block_id);
754 return 0;
755 }
756
757 memcpy(tmpbuf, &fb->info, sizeof(tmpbuf));
758 fill_fb_info(ump, (struct snd_ump_block_info *)tmpbuf, buf);
759 return memcmp(&fb->info, tmpbuf, sizeof(tmpbuf)) != 0;
760 }
761
762 /* notify the FB info/name change to sequencer */
763 static void seq_notify_fb_change(struct snd_ump_endpoint *ump,
764 struct snd_ump_block *fb)
765 {
766 #if IS_ENABLED(CONFIG_SND_SEQUENCER)
767 if (ump->seq_ops && ump->seq_ops->notify_fb_change)
768 ump->seq_ops->notify_fb_change(ump, fb);
769 #endif
770 }
771
772 /* handle FB info message; update FB info if the block is present */
773 static int ump_handle_fb_info_msg(struct snd_ump_endpoint *ump,
774 const union snd_ump_stream_msg *buf)
775 {
776 unsigned char blk;
777 struct snd_ump_block *fb;
778
779 blk = buf->fb_info.function_block_id;
780 fb = snd_ump_get_block(ump, blk);
781
782 /* complain only if updated after parsing */
783 if (!fb && ump->parsed) {
784 ump_info(ump, "Function Block Info Update for non-existing block %d\n",
785 blk);
786 return -ENODEV;
787 }
788
789 /* When updated after the initial parse, check the FB info update */
790 if (ump->parsed && !is_fb_info_updated(ump, fb, buf))
791 return 1; /* no content change */
792
793 if (fb) {
794 fill_fb_info(ump, &fb->info, buf);
795 if (ump->parsed)
796 seq_notify_fb_change(ump, fb);
797 }
798
799 return 1; /* finished */
800 }
801
802 /* handle FB name message; update the FB name string */
803 static int ump_handle_fb_name_msg(struct snd_ump_endpoint *ump,
804 const union snd_ump_stream_msg *buf)
805 {
806 unsigned char blk;
807 struct snd_ump_block *fb;
808 int ret;
809
810 blk = buf->fb_name.function_block_id;
811 fb = snd_ump_get_block(ump, blk);
812 if (!fb)
813 return -ENODEV;
814
815 if (ump->parsed &&
816 (ump->info.flags & SNDRV_UMP_EP_INFO_STATIC_BLOCKS)) {
817 ump_dbg(ump, "Skipping static FB name update (blk#%d)\n",
818 fb->info.block_id);
819 return 0;
820 }
821
822 ret = ump_append_string(ump, fb->info.name, sizeof(fb->info.name),
823 buf->raw, 3);
824 /* notify the FB name update to sequencer, too */
825 if (ret > 0 && ump->parsed)
826 seq_notify_fb_change(ump, fb);
827 return ret;
828 }
829
830 static int create_block_from_fb_info(struct snd_ump_endpoint *ump, int blk)
831 {
832 struct snd_ump_block *fb;
833 unsigned char direction, first_group, num_groups;
834 const union snd_ump_stream_msg *buf =
835 (const union snd_ump_stream_msg *)ump->input_buf;
836 u32 msg;
837 int err;
838
839 /* query the FB info once */
840 msg = ump_stream_compose(UMP_STREAM_MSG_STATUS_FB_DISCOVERY, 0) |
841 (blk << 8) | UMP_STREAM_MSG_REQUEST_FB_INFO;
842 err = ump_req_msg(ump, msg, 0, UMP_STREAM_MSG_STATUS_FB_INFO);
843 if (err < 0) {
844 ump_dbg(ump, "Unable to get FB info for block %d\n", blk);
845 return err;
846 }
847
848 /* the last input must be the FB info */
849 if (buf->fb_info.status != UMP_STREAM_MSG_STATUS_FB_INFO) {
850 ump_dbg(ump, "Inconsistent input: 0x%x\n", *buf->raw);
851 return -EINVAL;
852 }
853
854 direction = buf->fb_info.direction;
855 first_group = buf->fb_info.first_group;
856 num_groups = buf->fb_info.num_groups;
857
858 err = snd_ump_block_new(ump, blk, direction, first_group, num_groups,
859 &fb);
860 if (err < 0)
861 return err;
862
863 fill_fb_info(ump, &fb->info, buf);
864
865 msg = ump_stream_compose(UMP_STREAM_MSG_STATUS_FB_DISCOVERY, 0) |
866 (blk << 8) | UMP_STREAM_MSG_REQUEST_FB_NAME;
867 err = ump_req_msg(ump, msg, 0, UMP_STREAM_MSG_STATUS_FB_NAME);
868 if (err)
869 ump_dbg(ump, "Unable to get UMP FB name string #%d\n", blk);
870
871 return 0;
872 }
873
874 /* handle stream messages, called from snd_ump_receive() */
875 static void ump_handle_stream_msg(struct snd_ump_endpoint *ump,
876 const u32 *buf, int size)
877 {
878 const union snd_ump_stream_msg *msg;
879 unsigned int status;
880 int ret;
881
882 /* UMP stream message suppressed (for gadget UMP)? */
883 if (ump->no_process_stream)
884 return;
885
886 BUILD_BUG_ON(sizeof(*msg) != 16);
887 ump_dbg(ump, "Stream msg: %08x %08x %08x %08x\n",
888 buf[0], buf[1], buf[2], buf[3]);
889
890 if (size != 4 || ump_message_type(*buf) != UMP_MSG_TYPE_STREAM)
891 return;
892
893 msg = (const union snd_ump_stream_msg *)buf;
894 status = ump_stream_message_status(*buf);
895 switch (status) {
896 case UMP_STREAM_MSG_STATUS_EP_INFO:
897 ret = ump_handle_ep_info_msg(ump, msg);
898 break;
899 case UMP_STREAM_MSG_STATUS_DEVICE_INFO:
900 ret = ump_handle_device_info_msg(ump, msg);
901 break;
902 case UMP_STREAM_MSG_STATUS_EP_NAME:
903 ret = ump_handle_ep_name_msg(ump, msg);
904 break;
905 case UMP_STREAM_MSG_STATUS_PRODUCT_ID:
906 ret = ump_handle_product_id_msg(ump, msg);
907 break;
908 case UMP_STREAM_MSG_STATUS_STREAM_CFG:
909 ret = ump_handle_stream_cfg_msg(ump, msg);
910 break;
911 case UMP_STREAM_MSG_STATUS_FB_INFO:
912 ret = ump_handle_fb_info_msg(ump, msg);
913 break;
914 case UMP_STREAM_MSG_STATUS_FB_NAME:
915 ret = ump_handle_fb_name_msg(ump, msg);
916 break;
917 default:
918 return;
919 }
920
921 /* when the message has been processed fully, wake up */
922 if (ret > 0 && ump->stream_wait_for == status) {
923 WRITE_ONCE(ump->stream_finished, 1);
924 wake_up(&ump->stream_wait);
925 }
926 }
927
928 /**
929 * snd_ump_parse_endpoint - parse endpoint and create function blocks
930 * @ump: UMP object
931 *
932 * Returns 0 for successful parse, -ENODEV if device doesn't respond
933 * (or the query is unsupported), or other error code for serious errors.
934 */
935 int snd_ump_parse_endpoint(struct snd_ump_endpoint *ump)
936 {
937 int blk, err;
938 u32 msg;
939
940 if (!(ump->core.info_flags & SNDRV_RAWMIDI_INFO_DUPLEX))
941 return -ENODEV;
942
943 err = ump_request_open(ump);
944 if (err < 0) {
945 ump_dbg(ump, "Unable to open rawmidi device: %d\n", err);
946 return err;
947 }
948
949 /* Check Endpoint Information */
950 msg = ump_stream_compose(UMP_STREAM_MSG_STATUS_EP_DISCOVERY, 0) |
951 0x0101; /* UMP version 1.1 */
952 err = ump_req_msg(ump, msg, UMP_STREAM_MSG_REQUEST_EP_INFO,
953 UMP_STREAM_MSG_STATUS_EP_INFO);
954 if (err < 0) {
955 ump_dbg(ump, "Unable to get UMP EP info\n");
956 goto error;
957 }
958
959 /* Request Endpoint Device Info */
960 err = ump_req_msg(ump, msg, UMP_STREAM_MSG_REQUEST_DEVICE_INFO,
961 UMP_STREAM_MSG_STATUS_DEVICE_INFO);
962 if (err < 0)
963 ump_dbg(ump, "Unable to get UMP EP device info\n");
964
965 /* Request Endpoint Name */
966 err = ump_req_msg(ump, msg, UMP_STREAM_MSG_REQUEST_EP_NAME,
967 UMP_STREAM_MSG_STATUS_EP_NAME);
968 if (err < 0)
969 ump_dbg(ump, "Unable to get UMP EP name string\n");
970
971 /* Request Endpoint Product ID */
972 err = ump_req_msg(ump, msg, UMP_STREAM_MSG_REQUEST_PRODUCT_ID,
973 UMP_STREAM_MSG_STATUS_PRODUCT_ID);
974 if (err < 0)
975 ump_dbg(ump, "Unable to get UMP EP product ID string\n");
976
977 /* Get the current stream configuration */
978 err = ump_req_msg(ump, msg, UMP_STREAM_MSG_REQUEST_STREAM_CFG,
979 UMP_STREAM_MSG_STATUS_STREAM_CFG);
980 if (err < 0)
981 ump_dbg(ump, "Unable to get UMP EP stream config\n");
982
983 /* If no protocol is set by some reason, assume the valid one */
984 if (!(ump->info.protocol & SNDRV_UMP_EP_INFO_PROTO_MIDI_MASK)) {
985 if (ump->info.protocol_caps & SNDRV_UMP_EP_INFO_PROTO_MIDI2)
986 ump->info.protocol |= SNDRV_UMP_EP_INFO_PROTO_MIDI2;
987 else if (ump->info.protocol_caps & SNDRV_UMP_EP_INFO_PROTO_MIDI1)
988 ump->info.protocol |= SNDRV_UMP_EP_INFO_PROTO_MIDI1;
989 }
990
991 /* Query and create blocks from Function Blocks */
992 for (blk = 0; blk < ump->info.num_blocks; blk++) {
993 err = create_block_from_fb_info(ump, blk);
994 if (err < 0)
995 continue;
996 }
997
998 error:
999 ump->parsed = true;
1000 ump_request_close(ump);
1001 if (err == -ETIMEDOUT)
1002 err = -ENODEV;
1003 return err;
1004 }
1005 EXPORT_SYMBOL_GPL(snd_ump_parse_endpoint);
1006
1007 #if IS_ENABLED(CONFIG_SND_UMP_LEGACY_RAWMIDI)
1008 /*
1009 * Legacy rawmidi support
1010 */
1011 static int snd_ump_legacy_open(struct snd_rawmidi_substream *substream)
1012 {
1013 struct snd_ump_endpoint *ump = substream->rmidi->private_data;
1014 int dir = substream->stream;
1015 int group = ump->legacy_mapping[substream->number];
1016 int err;
1017
1018 guard(mutex)(&ump->open_mutex);
1019 if (ump->legacy_substreams[dir][group])
1020 return -EBUSY;
1021 if (dir == SNDRV_RAWMIDI_STREAM_OUTPUT) {
1022 if (!ump->legacy_out_opens) {
1023 err = snd_rawmidi_kernel_open(&ump->core, 0,
1024 SNDRV_RAWMIDI_LFLG_OUTPUT |
1025 SNDRV_RAWMIDI_LFLG_APPEND,
1026 &ump->legacy_out_rfile);
1027 if (err < 0)
1028 return err;
1029 }
1030 ump->legacy_out_opens++;
1031 snd_ump_convert_reset(&ump->out_cvts[group]);
1032 }
1033 guard(spinlock_irq)(&ump->legacy_locks[dir]);
1034 ump->legacy_substreams[dir][group] = substream;
1035 return 0;
1036 }
1037
1038 static int snd_ump_legacy_close(struct snd_rawmidi_substream *substream)
1039 {
1040 struct snd_ump_endpoint *ump = substream->rmidi->private_data;
1041 int dir = substream->stream;
1042 int group = ump->legacy_mapping[substream->number];
1043
1044 guard(mutex)(&ump->open_mutex);
1045 scoped_guard(spinlock_irq, &ump->legacy_locks[dir])
1046 ump->legacy_substreams[dir][group] = NULL;
1047 if (dir == SNDRV_RAWMIDI_STREAM_OUTPUT) {
1048 if (!--ump->legacy_out_opens)
1049 snd_rawmidi_kernel_release(&ump->legacy_out_rfile);
1050 }
1051 return 0;
1052 }
1053
1054 static void snd_ump_legacy_trigger(struct snd_rawmidi_substream *substream,
1055 int up)
1056 {
1057 struct snd_ump_endpoint *ump = substream->rmidi->private_data;
1058 int dir = substream->stream;
1059
1060 ump->ops->trigger(ump, dir, up);
1061 }
1062
1063 static void snd_ump_legacy_drain(struct snd_rawmidi_substream *substream)
1064 {
1065 struct snd_ump_endpoint *ump = substream->rmidi->private_data;
1066
1067 if (ump->ops->drain)
1068 ump->ops->drain(ump, SNDRV_RAWMIDI_STREAM_OUTPUT);
1069 }
1070
1071 static int snd_ump_legacy_dev_register(struct snd_rawmidi *rmidi)
1072 {
1073 /* dummy, just for avoiding create superfluous seq clients */
1074 return 0;
1075 }
1076
1077 static const struct snd_rawmidi_ops snd_ump_legacy_input_ops = {
1078 .open = snd_ump_legacy_open,
1079 .close = snd_ump_legacy_close,
1080 .trigger = snd_ump_legacy_trigger,
1081 };
1082
1083 static const struct snd_rawmidi_ops snd_ump_legacy_output_ops = {
1084 .open = snd_ump_legacy_open,
1085 .close = snd_ump_legacy_close,
1086 .trigger = snd_ump_legacy_trigger,
1087 .drain = snd_ump_legacy_drain,
1088 };
1089
1090 static const struct snd_rawmidi_global_ops snd_ump_legacy_ops = {
1091 .dev_register = snd_ump_legacy_dev_register,
1092 };
1093
1094 static int process_legacy_output(struct snd_ump_endpoint *ump,
1095 u32 *buffer, int count)
1096 {
1097 struct snd_rawmidi_substream *substream;
1098 struct ump_cvt_to_ump *ctx;
1099 const int dir = SNDRV_RAWMIDI_STREAM_OUTPUT;
1100 unsigned char c;
1101 int group, size = 0;
1102
1103 if (!ump->out_cvts || !ump->legacy_out_opens)
1104 return 0;
1105
1106 guard(spinlock_irqsave)(&ump->legacy_locks[dir]);
1107 for (group = 0; group < SNDRV_UMP_MAX_GROUPS; group++) {
1108 substream = ump->legacy_substreams[dir][group];
1109 if (!substream)
1110 continue;
1111 ctx = &ump->out_cvts[group];
1112 while (!ctx->ump_bytes &&
1113 snd_rawmidi_transmit(substream, &c, 1) > 0)
1114 snd_ump_convert_to_ump(ctx, group, ump->info.protocol, c);
1115 if (ctx->ump_bytes && ctx->ump_bytes <= count) {
1116 size = ctx->ump_bytes;
1117 memcpy(buffer, ctx->ump, size);
1118 ctx->ump_bytes = 0;
1119 break;
1120 }
1121 }
1122 return size;
1123 }
1124
1125 static void process_legacy_input(struct snd_ump_endpoint *ump, const u32 *src,
1126 int words)
1127 {
1128 struct snd_rawmidi_substream *substream;
1129 unsigned char buf[16];
1130 unsigned char group;
1131 const int dir = SNDRV_RAWMIDI_STREAM_INPUT;
1132 int size;
1133
1134 size = snd_ump_convert_from_ump(src, buf, &group);
1135 if (size <= 0)
1136 return;
1137 guard(spinlock_irqsave)(&ump->legacy_locks[dir]);
1138 substream = ump->legacy_substreams[dir][group];
1139 if (substream)
1140 snd_rawmidi_receive(substream, buf, size);
1141 }
1142
1143 /* Fill ump->legacy_mapping[] for groups to be used for legacy rawmidi */
1144 static int fill_legacy_mapping(struct snd_ump_endpoint *ump)
1145 {
1146 struct snd_ump_block *fb;
1147 unsigned int group_maps = 0;
1148 int i, num;
1149
1150 if (ump->info.flags & SNDRV_UMP_EP_INFO_STATIC_BLOCKS) {
1151 list_for_each_entry(fb, &ump->block_list, list) {
1152 for (i = 0; i < fb->info.num_groups; i++)
1153 group_maps |= 1U << (fb->info.first_group + i);
1154 }
1155 if (!group_maps)
1156 ump_info(ump, "No UMP Group is found in FB\n");
1157 }
1158
1159 /* use all groups for non-static case */
1160 if (!group_maps)
1161 group_maps = (1U << SNDRV_UMP_MAX_GROUPS) - 1;
1162
1163 num = 0;
1164 for (i = 0; i < SNDRV_UMP_MAX_GROUPS; i++)
1165 if (group_maps & (1U << i))
1166 ump->legacy_mapping[num++] = i;
1167
1168 return num;
1169 }
1170
1171 static void fill_substream_names(struct snd_ump_endpoint *ump,
1172 struct snd_rawmidi *rmidi, int dir)
1173 {
1174 struct snd_rawmidi_substream *s;
1175
1176 list_for_each_entry(s, &rmidi->streams[dir].substreams, list)
1177 snprintf(s->name, sizeof(s->name), "Group %d (%.16s)",
1178 ump->legacy_mapping[s->number] + 1, ump->info.name);
1179 }
1180
1181 int snd_ump_attach_legacy_rawmidi(struct snd_ump_endpoint *ump,
1182 char *id, int device)
1183 {
1184 struct snd_rawmidi *rmidi;
1185 bool input, output;
1186 int err, num;
1187
1188 ump->out_cvts = kcalloc(SNDRV_UMP_MAX_GROUPS,
1189 sizeof(*ump->out_cvts), GFP_KERNEL);
1190 if (!ump->out_cvts)
1191 return -ENOMEM;
1192
1193 num = fill_legacy_mapping(ump);
1194
1195 input = ump->core.info_flags & SNDRV_RAWMIDI_INFO_INPUT;
1196 output = ump->core.info_flags & SNDRV_RAWMIDI_INFO_OUTPUT;
1197 err = snd_rawmidi_new(ump->core.card, id, device,
1198 output ? num : 0, input ? num : 0,
1199 &rmidi);
1200 if (err < 0) {
1201 kfree(ump->out_cvts);
1202 return err;
1203 }
1204
1205 if (input)
1206 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
1207 &snd_ump_legacy_input_ops);
1208 if (output)
1209 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
1210 &snd_ump_legacy_output_ops);
1211 snprintf(rmidi->name, sizeof(rmidi->name), "%.68s (MIDI 1.0)",
1212 ump->info.name);
1213 rmidi->info_flags = ump->core.info_flags & ~SNDRV_RAWMIDI_INFO_UMP;
1214 rmidi->ops = &snd_ump_legacy_ops;
1215 rmidi->private_data = ump;
1216 ump->legacy_rmidi = rmidi;
1217 if (input)
1218 fill_substream_names(ump, rmidi, SNDRV_RAWMIDI_STREAM_INPUT);
1219 if (output)
1220 fill_substream_names(ump, rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT);
1221
1222 ump_dbg(ump, "Created a legacy rawmidi #%d (%s)\n", device, id);
1223 return 0;
1224 }
1225 EXPORT_SYMBOL_GPL(snd_ump_attach_legacy_rawmidi);
1226 #endif /* CONFIG_SND_UMP_LEGACY_RAWMIDI */
1227
1228 MODULE_DESCRIPTION("Universal MIDI Packet (UMP) Core Driver");
1229 MODULE_LICENSE("GPL");
1230
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