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