Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Abstract layer for MIDI v1.0 stream |
| 3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> |
| 4 | * |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | #include <sound/driver.h> |
| 23 | #include <sound/core.h> |
| 24 | #include <linux/major.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/smp_lock.h> |
| 27 | #include <linux/sched.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <linux/time.h> |
| 30 | #include <linux/wait.h> |
| 31 | #include <linux/moduleparam.h> |
| 32 | #include <linux/delay.h> |
| 33 | #include <linux/wait.h> |
| 34 | #include <sound/rawmidi.h> |
| 35 | #include <sound/info.h> |
| 36 | #include <sound/control.h> |
| 37 | #include <sound/minors.h> |
| 38 | #include <sound/initval.h> |
| 39 | |
| 40 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); |
| 41 | MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA."); |
| 42 | MODULE_LICENSE("GPL"); |
| 43 | |
| 44 | #ifdef CONFIG_SND_OSSEMUL |
| 45 | static int midi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0}; |
| 46 | static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; |
| 47 | module_param_array(midi_map, int, NULL, 0444); |
| 48 | MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device."); |
| 49 | module_param_array(amidi_map, int, NULL, 0444); |
| 50 | MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device."); |
| 51 | #endif /* CONFIG_SND_OSSEMUL */ |
| 52 | |
| 53 | static int snd_rawmidi_free(snd_rawmidi_t *rawmidi); |
| 54 | static int snd_rawmidi_dev_free(snd_device_t *device); |
| 55 | static int snd_rawmidi_dev_register(snd_device_t *device); |
| 56 | static int snd_rawmidi_dev_disconnect(snd_device_t *device); |
| 57 | static int snd_rawmidi_dev_unregister(snd_device_t *device); |
| 58 | |
| 59 | static snd_rawmidi_t *snd_rawmidi_devices[SNDRV_CARDS * SNDRV_RAWMIDI_DEVICES]; |
| 60 | |
| 61 | static DECLARE_MUTEX(register_mutex); |
| 62 | |
| 63 | static inline unsigned short snd_rawmidi_file_flags(struct file *file) |
| 64 | { |
| 65 | switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { |
| 66 | case FMODE_WRITE: |
| 67 | return SNDRV_RAWMIDI_LFLG_OUTPUT; |
| 68 | case FMODE_READ: |
| 69 | return SNDRV_RAWMIDI_LFLG_INPUT; |
| 70 | default: |
| 71 | return SNDRV_RAWMIDI_LFLG_OPEN; |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | static inline int snd_rawmidi_ready(snd_rawmidi_substream_t * substream) |
| 76 | { |
| 77 | snd_rawmidi_runtime_t *runtime = substream->runtime; |
| 78 | return runtime->avail >= runtime->avail_min; |
| 79 | } |
| 80 | |
| 81 | static inline int snd_rawmidi_ready_append(snd_rawmidi_substream_t * substream, size_t count) |
| 82 | { |
| 83 | snd_rawmidi_runtime_t *runtime = substream->runtime; |
| 84 | return runtime->avail >= runtime->avail_min && |
| 85 | (!substream->append || runtime->avail >= count); |
| 86 | } |
| 87 | |
| 88 | static void snd_rawmidi_input_event_tasklet(unsigned long data) |
| 89 | { |
| 90 | snd_rawmidi_substream_t *substream = (snd_rawmidi_substream_t *)data; |
| 91 | substream->runtime->event(substream); |
| 92 | } |
| 93 | |
| 94 | static void snd_rawmidi_output_trigger_tasklet(unsigned long data) |
| 95 | { |
| 96 | snd_rawmidi_substream_t *substream = (snd_rawmidi_substream_t *)data; |
| 97 | substream->ops->trigger(substream, 1); |
| 98 | } |
| 99 | |
| 100 | static int snd_rawmidi_runtime_create(snd_rawmidi_substream_t * substream) |
| 101 | { |
| 102 | snd_rawmidi_runtime_t *runtime; |
| 103 | |
| 104 | if ((runtime = kcalloc(1, sizeof(*runtime), GFP_KERNEL)) == NULL) |
| 105 | return -ENOMEM; |
| 106 | spin_lock_init(&runtime->lock); |
| 107 | init_waitqueue_head(&runtime->sleep); |
| 108 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) |
| 109 | tasklet_init(&runtime->tasklet, |
| 110 | snd_rawmidi_input_event_tasklet, |
| 111 | (unsigned long)substream); |
| 112 | else |
| 113 | tasklet_init(&runtime->tasklet, |
| 114 | snd_rawmidi_output_trigger_tasklet, |
| 115 | (unsigned long)substream); |
| 116 | runtime->event = NULL; |
| 117 | runtime->buffer_size = PAGE_SIZE; |
| 118 | runtime->avail_min = 1; |
| 119 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) |
| 120 | runtime->avail = 0; |
| 121 | else |
| 122 | runtime->avail = runtime->buffer_size; |
| 123 | if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) { |
| 124 | kfree(runtime); |
| 125 | return -ENOMEM; |
| 126 | } |
| 127 | runtime->appl_ptr = runtime->hw_ptr = 0; |
| 128 | substream->runtime = runtime; |
| 129 | return 0; |
| 130 | } |
| 131 | |
| 132 | static int snd_rawmidi_runtime_free(snd_rawmidi_substream_t * substream) |
| 133 | { |
| 134 | snd_rawmidi_runtime_t *runtime = substream->runtime; |
| 135 | |
| 136 | kfree(runtime->buffer); |
| 137 | kfree(runtime); |
| 138 | substream->runtime = NULL; |
| 139 | return 0; |
| 140 | } |
| 141 | |
| 142 | static inline void snd_rawmidi_output_trigger(snd_rawmidi_substream_t * substream, int up) |
| 143 | { |
| 144 | if (up) { |
| 145 | tasklet_hi_schedule(&substream->runtime->tasklet); |
| 146 | } else { |
| 147 | tasklet_kill(&substream->runtime->tasklet); |
| 148 | substream->ops->trigger(substream, 0); |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | static void snd_rawmidi_input_trigger(snd_rawmidi_substream_t * substream, int up) |
| 153 | { |
| 154 | substream->ops->trigger(substream, up); |
| 155 | if (!up && substream->runtime->event) |
| 156 | tasklet_kill(&substream->runtime->tasklet); |
| 157 | } |
| 158 | |
| 159 | int snd_rawmidi_drop_output(snd_rawmidi_substream_t * substream) |
| 160 | { |
| 161 | unsigned long flags; |
| 162 | snd_rawmidi_runtime_t *runtime = substream->runtime; |
| 163 | |
| 164 | snd_rawmidi_output_trigger(substream, 0); |
| 165 | runtime->drain = 0; |
| 166 | spin_lock_irqsave(&runtime->lock, flags); |
| 167 | runtime->appl_ptr = runtime->hw_ptr = 0; |
| 168 | runtime->avail = runtime->buffer_size; |
| 169 | spin_unlock_irqrestore(&runtime->lock, flags); |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | int snd_rawmidi_drain_output(snd_rawmidi_substream_t * substream) |
| 174 | { |
| 175 | int err; |
| 176 | long timeout; |
| 177 | snd_rawmidi_runtime_t *runtime = substream->runtime; |
| 178 | |
| 179 | err = 0; |
| 180 | runtime->drain = 1; |
| 181 | timeout = wait_event_interruptible_timeout(runtime->sleep, |
| 182 | (runtime->avail >= runtime->buffer_size), |
| 183 | 10*HZ); |
| 184 | if (signal_pending(current)) |
| 185 | err = -ERESTARTSYS; |
| 186 | if (runtime->avail < runtime->buffer_size && !timeout) { |
| 187 | snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size); |
| 188 | err = -EIO; |
| 189 | } |
| 190 | runtime->drain = 0; |
| 191 | if (err != -ERESTARTSYS) { |
| 192 | /* we need wait a while to make sure that Tx FIFOs are empty */ |
| 193 | if (substream->ops->drain) |
| 194 | substream->ops->drain(substream); |
| 195 | else |
| 196 | msleep(50); |
| 197 | snd_rawmidi_drop_output(substream); |
| 198 | } |
| 199 | return err; |
| 200 | } |
| 201 | |
| 202 | int snd_rawmidi_drain_input(snd_rawmidi_substream_t * substream) |
| 203 | { |
| 204 | unsigned long flags; |
| 205 | snd_rawmidi_runtime_t *runtime = substream->runtime; |
| 206 | |
| 207 | snd_rawmidi_input_trigger(substream, 0); |
| 208 | runtime->drain = 0; |
| 209 | spin_lock_irqsave(&runtime->lock, flags); |
| 210 | runtime->appl_ptr = runtime->hw_ptr = 0; |
| 211 | runtime->avail = 0; |
| 212 | spin_unlock_irqrestore(&runtime->lock, flags); |
| 213 | return 0; |
| 214 | } |
| 215 | |
| 216 | int snd_rawmidi_kernel_open(int cardnum, int device, int subdevice, |
| 217 | int mode, snd_rawmidi_file_t * rfile) |
| 218 | { |
| 219 | snd_rawmidi_t *rmidi; |
| 220 | struct list_head *list1, *list2; |
| 221 | snd_rawmidi_substream_t *sinput = NULL, *soutput = NULL; |
| 222 | snd_rawmidi_runtime_t *input = NULL, *output = NULL; |
| 223 | int err; |
| 224 | |
| 225 | if (rfile) |
| 226 | rfile->input = rfile->output = NULL; |
| 227 | rmidi = snd_rawmidi_devices[(cardnum * SNDRV_RAWMIDI_DEVICES) + device]; |
| 228 | if (rmidi == NULL) { |
| 229 | err = -ENODEV; |
| 230 | goto __error1; |
| 231 | } |
| 232 | if (!try_module_get(rmidi->card->module)) { |
| 233 | err = -EFAULT; |
| 234 | goto __error1; |
| 235 | } |
| 236 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) |
| 237 | down(&rmidi->open_mutex); |
| 238 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
| 239 | if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT)) { |
| 240 | err = -ENXIO; |
| 241 | goto __error; |
| 242 | } |
| 243 | if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) { |
| 244 | err = -ENODEV; |
| 245 | goto __error; |
| 246 | } |
| 247 | if (rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened >= |
| 248 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) { |
| 249 | err = -EAGAIN; |
| 250 | goto __error; |
| 251 | } |
| 252 | } |
| 253 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { |
| 254 | if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT)) { |
| 255 | err = -ENXIO; |
| 256 | goto __error; |
| 257 | } |
| 258 | if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) { |
| 259 | err = -ENODEV; |
| 260 | goto __error; |
| 261 | } |
| 262 | if (rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened >= |
| 263 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) { |
| 264 | err = -EAGAIN; |
| 265 | goto __error; |
| 266 | } |
| 267 | } |
| 268 | list1 = rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams.next; |
| 269 | while (1) { |
| 270 | if (list1 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) { |
| 271 | sinput = NULL; |
| 272 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
| 273 | err = -EAGAIN; |
| 274 | goto __error; |
| 275 | } |
| 276 | break; |
| 277 | } |
| 278 | sinput = list_entry(list1, snd_rawmidi_substream_t, list); |
| 279 | if ((mode & SNDRV_RAWMIDI_LFLG_INPUT) && sinput->opened) |
| 280 | goto __nexti; |
| 281 | if (subdevice < 0 || (subdevice >= 0 && subdevice == sinput->number)) |
| 282 | break; |
| 283 | __nexti: |
| 284 | list1 = list1->next; |
| 285 | } |
| 286 | list2 = rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams.next; |
| 287 | while (1) { |
| 288 | if (list2 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) { |
| 289 | soutput = NULL; |
| 290 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { |
| 291 | err = -EAGAIN; |
| 292 | goto __error; |
| 293 | } |
| 294 | break; |
| 295 | } |
| 296 | soutput = list_entry(list2, snd_rawmidi_substream_t, list); |
| 297 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { |
| 298 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) { |
| 299 | if (soutput->opened && !soutput->append) |
| 300 | goto __nexto; |
| 301 | } else { |
| 302 | if (soutput->opened) |
| 303 | goto __nexto; |
| 304 | } |
| 305 | } |
| 306 | if (subdevice < 0 || (subdevice >= 0 && subdevice == soutput->number)) |
| 307 | break; |
| 308 | __nexto: |
| 309 | list2 = list2->next; |
| 310 | } |
| 311 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
| 312 | if ((err = snd_rawmidi_runtime_create(sinput)) < 0) |
| 313 | goto __error; |
| 314 | input = sinput->runtime; |
| 315 | if ((err = sinput->ops->open(sinput)) < 0) |
| 316 | goto __error; |
| 317 | sinput->opened = 1; |
| 318 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++; |
| 319 | } else { |
| 320 | sinput = NULL; |
| 321 | } |
| 322 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { |
| 323 | if (soutput->opened) |
| 324 | goto __skip_output; |
| 325 | if ((err = snd_rawmidi_runtime_create(soutput)) < 0) { |
| 326 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) |
| 327 | sinput->ops->close(sinput); |
| 328 | goto __error; |
| 329 | } |
| 330 | output = soutput->runtime; |
| 331 | if ((err = soutput->ops->open(soutput)) < 0) { |
| 332 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) |
| 333 | sinput->ops->close(sinput); |
| 334 | goto __error; |
| 335 | } |
| 336 | __skip_output: |
| 337 | soutput->opened = 1; |
| 338 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) |
| 339 | soutput->append = 1; |
| 340 | if (soutput->use_count++ == 0) |
| 341 | soutput->active_sensing = 1; |
| 342 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened++; |
| 343 | } else { |
| 344 | soutput = NULL; |
| 345 | } |
| 346 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) |
| 347 | up(&rmidi->open_mutex); |
| 348 | if (rfile) { |
| 349 | rfile->rmidi = rmidi; |
| 350 | rfile->input = sinput; |
| 351 | rfile->output = soutput; |
| 352 | } |
| 353 | return 0; |
| 354 | |
| 355 | __error: |
| 356 | if (input != NULL) |
| 357 | snd_rawmidi_runtime_free(sinput); |
| 358 | if (output != NULL) |
| 359 | snd_rawmidi_runtime_free(soutput); |
| 360 | module_put(rmidi->card->module); |
| 361 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) |
| 362 | up(&rmidi->open_mutex); |
| 363 | __error1: |
| 364 | return err; |
| 365 | } |
| 366 | |
| 367 | static int snd_rawmidi_open(struct inode *inode, struct file *file) |
| 368 | { |
| 369 | int maj = imajor(inode); |
| 370 | int cardnum; |
| 371 | snd_card_t *card; |
| 372 | int device, subdevice; |
| 373 | unsigned short fflags; |
| 374 | int err; |
| 375 | snd_rawmidi_t *rmidi; |
| 376 | snd_rawmidi_file_t *rawmidi_file; |
| 377 | wait_queue_t wait; |
| 378 | struct list_head *list; |
| 379 | snd_ctl_file_t *kctl; |
| 380 | |
| 381 | switch (maj) { |
| 382 | case CONFIG_SND_MAJOR: |
| 383 | cardnum = SNDRV_MINOR_CARD(iminor(inode)); |
| 384 | cardnum %= SNDRV_CARDS; |
| 385 | device = SNDRV_MINOR_DEVICE(iminor(inode)) - SNDRV_MINOR_RAWMIDI; |
| 386 | device %= SNDRV_MINOR_RAWMIDIS; |
| 387 | break; |
| 388 | #ifdef CONFIG_SND_OSSEMUL |
| 389 | case SOUND_MAJOR: |
| 390 | cardnum = SNDRV_MINOR_OSS_CARD(iminor(inode)); |
| 391 | cardnum %= SNDRV_CARDS; |
| 392 | device = SNDRV_MINOR_OSS_DEVICE(iminor(inode)) == SNDRV_MINOR_OSS_MIDI ? |
| 393 | midi_map[cardnum] : amidi_map[cardnum]; |
| 394 | break; |
| 395 | #endif |
| 396 | default: |
| 397 | return -ENXIO; |
| 398 | } |
| 399 | |
| 400 | rmidi = snd_rawmidi_devices[(cardnum * SNDRV_RAWMIDI_DEVICES) + device]; |
| 401 | if (rmidi == NULL) |
| 402 | return -ENODEV; |
| 403 | #ifdef CONFIG_SND_OSSEMUL |
| 404 | if (maj == SOUND_MAJOR && !rmidi->ossreg) |
| 405 | return -ENXIO; |
| 406 | #endif |
| 407 | if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) |
| 408 | return -EINVAL; /* invalid combination */ |
| 409 | card = rmidi->card; |
| 410 | err = snd_card_file_add(card, file); |
| 411 | if (err < 0) |
| 412 | return -ENODEV; |
| 413 | fflags = snd_rawmidi_file_flags(file); |
| 414 | if ((file->f_flags & O_APPEND) || maj != CONFIG_SND_MAJOR) /* OSS emul? */ |
| 415 | fflags |= SNDRV_RAWMIDI_LFLG_APPEND; |
| 416 | fflags |= SNDRV_RAWMIDI_LFLG_NOOPENLOCK; |
| 417 | rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL); |
| 418 | if (rawmidi_file == NULL) { |
| 419 | snd_card_file_remove(card, file); |
| 420 | return -ENOMEM; |
| 421 | } |
| 422 | init_waitqueue_entry(&wait, current); |
| 423 | add_wait_queue(&rmidi->open_wait, &wait); |
| 424 | down(&rmidi->open_mutex); |
| 425 | while (1) { |
| 426 | subdevice = -1; |
| 427 | down_read(&card->controls_rwsem); |
| 428 | list_for_each(list, &card->ctl_files) { |
| 429 | kctl = snd_ctl_file(list); |
| 430 | if (kctl->pid == current->pid) { |
| 431 | subdevice = kctl->prefer_rawmidi_subdevice; |
| 432 | break; |
| 433 | } |
| 434 | } |
| 435 | up_read(&card->controls_rwsem); |
| 436 | err = snd_rawmidi_kernel_open(cardnum, device, subdevice, fflags, rawmidi_file); |
| 437 | if (err >= 0) |
| 438 | break; |
| 439 | if (err == -EAGAIN) { |
| 440 | if (file->f_flags & O_NONBLOCK) { |
| 441 | err = -EBUSY; |
| 442 | break; |
| 443 | } |
| 444 | } else |
| 445 | break; |
| 446 | set_current_state(TASK_INTERRUPTIBLE); |
| 447 | up(&rmidi->open_mutex); |
| 448 | schedule(); |
| 449 | down(&rmidi->open_mutex); |
| 450 | if (signal_pending(current)) { |
| 451 | err = -ERESTARTSYS; |
| 452 | break; |
| 453 | } |
| 454 | } |
| 455 | #ifdef CONFIG_SND_OSSEMUL |
| 456 | if (rawmidi_file->input && rawmidi_file->input->runtime) |
| 457 | rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR); |
| 458 | if (rawmidi_file->output && rawmidi_file->output->runtime) |
| 459 | rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR); |
| 460 | #endif |
| 461 | remove_wait_queue(&rmidi->open_wait, &wait); |
| 462 | if (err >= 0) { |
| 463 | file->private_data = rawmidi_file; |
| 464 | } else { |
| 465 | snd_card_file_remove(card, file); |
| 466 | kfree(rawmidi_file); |
| 467 | } |
| 468 | up(&rmidi->open_mutex); |
| 469 | return err; |
| 470 | } |
| 471 | |
| 472 | int snd_rawmidi_kernel_release(snd_rawmidi_file_t * rfile) |
| 473 | { |
| 474 | snd_rawmidi_t *rmidi; |
| 475 | snd_rawmidi_substream_t *substream; |
| 476 | snd_rawmidi_runtime_t *runtime; |
| 477 | |
| 478 | snd_assert(rfile != NULL, return -ENXIO); |
| 479 | snd_assert(rfile->input != NULL || rfile->output != NULL, return -ENXIO); |
| 480 | rmidi = rfile->rmidi; |
| 481 | down(&rmidi->open_mutex); |
| 482 | if (rfile->input != NULL) { |
| 483 | substream = rfile->input; |
| 484 | rfile->input = NULL; |
| 485 | runtime = substream->runtime; |
| 486 | snd_rawmidi_input_trigger(substream, 0); |
| 487 | substream->ops->close(substream); |
| 488 | if (runtime->private_free != NULL) |
| 489 | runtime->private_free(substream); |
| 490 | snd_rawmidi_runtime_free(substream); |
| 491 | substream->opened = 0; |
| 492 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened--; |
| 493 | } |
| 494 | if (rfile->output != NULL) { |
| 495 | substream = rfile->output; |
| 496 | rfile->output = NULL; |
| 497 | if (--substream->use_count == 0) { |
| 498 | runtime = substream->runtime; |
| 499 | if (substream->active_sensing) { |
| 500 | unsigned char buf = 0xfe; |
| 501 | /* sending single active sensing message to shut the device up */ |
| 502 | snd_rawmidi_kernel_write(substream, &buf, 1); |
| 503 | } |
| 504 | if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS) |
| 505 | snd_rawmidi_output_trigger(substream, 0); |
| 506 | substream->ops->close(substream); |
| 507 | if (runtime->private_free != NULL) |
| 508 | runtime->private_free(substream); |
| 509 | snd_rawmidi_runtime_free(substream); |
| 510 | substream->opened = 0; |
| 511 | substream->append = 0; |
| 512 | } |
| 513 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened--; |
| 514 | } |
| 515 | up(&rmidi->open_mutex); |
| 516 | module_put(rmidi->card->module); |
| 517 | return 0; |
| 518 | } |
| 519 | |
| 520 | static int snd_rawmidi_release(struct inode *inode, struct file *file) |
| 521 | { |
| 522 | snd_rawmidi_file_t *rfile; |
| 523 | snd_rawmidi_t *rmidi; |
| 524 | int err; |
| 525 | |
| 526 | rfile = file->private_data; |
| 527 | err = snd_rawmidi_kernel_release(rfile); |
| 528 | rmidi = rfile->rmidi; |
| 529 | wake_up(&rmidi->open_wait); |
| 530 | kfree(rfile); |
| 531 | snd_card_file_remove(rmidi->card, file); |
| 532 | return err; |
| 533 | } |
| 534 | |
| 535 | int snd_rawmidi_info(snd_rawmidi_substream_t *substream, snd_rawmidi_info_t *info) |
| 536 | { |
| 537 | snd_rawmidi_t *rmidi; |
| 538 | |
| 539 | if (substream == NULL) |
| 540 | return -ENODEV; |
| 541 | rmidi = substream->rmidi; |
| 542 | memset(info, 0, sizeof(*info)); |
| 543 | info->card = rmidi->card->number; |
| 544 | info->device = rmidi->device; |
| 545 | info->subdevice = substream->number; |
| 546 | info->stream = substream->stream; |
| 547 | info->flags = rmidi->info_flags; |
| 548 | strcpy(info->id, rmidi->id); |
| 549 | strcpy(info->name, rmidi->name); |
| 550 | strcpy(info->subname, substream->name); |
| 551 | info->subdevices_count = substream->pstr->substream_count; |
| 552 | info->subdevices_avail = (substream->pstr->substream_count - |
| 553 | substream->pstr->substream_opened); |
| 554 | return 0; |
| 555 | } |
| 556 | |
| 557 | static int snd_rawmidi_info_user(snd_rawmidi_substream_t *substream, snd_rawmidi_info_t __user * _info) |
| 558 | { |
| 559 | snd_rawmidi_info_t info; |
| 560 | int err; |
| 561 | if ((err = snd_rawmidi_info(substream, &info)) < 0) |
| 562 | return err; |
| 563 | if (copy_to_user(_info, &info, sizeof(snd_rawmidi_info_t))) |
| 564 | return -EFAULT; |
| 565 | return 0; |
| 566 | } |
| 567 | |
| 568 | int snd_rawmidi_info_select(snd_card_t *card, snd_rawmidi_info_t *info) |
| 569 | { |
| 570 | snd_rawmidi_t *rmidi; |
| 571 | snd_rawmidi_str_t *pstr; |
| 572 | snd_rawmidi_substream_t *substream; |
| 573 | struct list_head *list; |
| 574 | if (info->device >= SNDRV_RAWMIDI_DEVICES) |
| 575 | return -ENXIO; |
| 576 | rmidi = snd_rawmidi_devices[card->number * SNDRV_RAWMIDI_DEVICES + info->device]; |
| 577 | if (info->stream < 0 || info->stream > 1) |
| 578 | return -EINVAL; |
| 579 | pstr = &rmidi->streams[info->stream]; |
| 580 | if (pstr->substream_count == 0) |
| 581 | return -ENOENT; |
| 582 | if (info->subdevice >= pstr->substream_count) |
| 583 | return -ENXIO; |
| 584 | list_for_each(list, &pstr->substreams) { |
| 585 | substream = list_entry(list, snd_rawmidi_substream_t, list); |
| 586 | if ((unsigned int)substream->number == info->subdevice) |
| 587 | return snd_rawmidi_info(substream, info); |
| 588 | } |
| 589 | return -ENXIO; |
| 590 | } |
| 591 | |
| 592 | static int snd_rawmidi_info_select_user(snd_card_t *card, |
| 593 | snd_rawmidi_info_t __user *_info) |
| 594 | { |
| 595 | int err; |
| 596 | snd_rawmidi_info_t info; |
| 597 | if (get_user(info.device, &_info->device)) |
| 598 | return -EFAULT; |
| 599 | if (get_user(info.stream, &_info->stream)) |
| 600 | return -EFAULT; |
| 601 | if (get_user(info.subdevice, &_info->subdevice)) |
| 602 | return -EFAULT; |
| 603 | if ((err = snd_rawmidi_info_select(card, &info)) < 0) |
| 604 | return err; |
| 605 | if (copy_to_user(_info, &info, sizeof(snd_rawmidi_info_t))) |
| 606 | return -EFAULT; |
| 607 | return 0; |
| 608 | } |
| 609 | |
| 610 | int snd_rawmidi_output_params(snd_rawmidi_substream_t * substream, |
| 611 | snd_rawmidi_params_t * params) |
| 612 | { |
| 613 | char *newbuf; |
| 614 | snd_rawmidi_runtime_t *runtime = substream->runtime; |
| 615 | |
| 616 | if (substream->append && substream->use_count > 1) |
| 617 | return -EBUSY; |
| 618 | snd_rawmidi_drain_output(substream); |
| 619 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { |
| 620 | return -EINVAL; |
| 621 | } |
| 622 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { |
| 623 | return -EINVAL; |
| 624 | } |
| 625 | if (params->buffer_size != runtime->buffer_size) { |
| 626 | if ((newbuf = (char *) kmalloc(params->buffer_size, GFP_KERNEL)) == NULL) |
| 627 | return -ENOMEM; |
| 628 | kfree(runtime->buffer); |
| 629 | runtime->buffer = newbuf; |
| 630 | runtime->buffer_size = params->buffer_size; |
| 631 | } |
| 632 | runtime->avail_min = params->avail_min; |
| 633 | substream->active_sensing = !params->no_active_sensing; |
| 634 | return 0; |
| 635 | } |
| 636 | |
| 637 | int snd_rawmidi_input_params(snd_rawmidi_substream_t * substream, |
| 638 | snd_rawmidi_params_t * params) |
| 639 | { |
| 640 | char *newbuf; |
| 641 | snd_rawmidi_runtime_t *runtime = substream->runtime; |
| 642 | |
| 643 | snd_rawmidi_drain_input(substream); |
| 644 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { |
| 645 | return -EINVAL; |
| 646 | } |
| 647 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { |
| 648 | return -EINVAL; |
| 649 | } |
| 650 | if (params->buffer_size != runtime->buffer_size) { |
| 651 | if ((newbuf = (char *) kmalloc(params->buffer_size, GFP_KERNEL)) == NULL) |
| 652 | return -ENOMEM; |
| 653 | kfree(runtime->buffer); |
| 654 | runtime->buffer = newbuf; |
| 655 | runtime->buffer_size = params->buffer_size; |
| 656 | } |
| 657 | runtime->avail_min = params->avail_min; |
| 658 | return 0; |
| 659 | } |
| 660 | |
| 661 | static int snd_rawmidi_output_status(snd_rawmidi_substream_t * substream, |
| 662 | snd_rawmidi_status_t * status) |
| 663 | { |
| 664 | snd_rawmidi_runtime_t *runtime = substream->runtime; |
| 665 | |
| 666 | memset(status, 0, sizeof(*status)); |
| 667 | status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; |
| 668 | spin_lock_irq(&runtime->lock); |
| 669 | status->avail = runtime->avail; |
| 670 | spin_unlock_irq(&runtime->lock); |
| 671 | return 0; |
| 672 | } |
| 673 | |
| 674 | static int snd_rawmidi_input_status(snd_rawmidi_substream_t * substream, |
| 675 | snd_rawmidi_status_t * status) |
| 676 | { |
| 677 | snd_rawmidi_runtime_t *runtime = substream->runtime; |
| 678 | |
| 679 | memset(status, 0, sizeof(*status)); |
| 680 | status->stream = SNDRV_RAWMIDI_STREAM_INPUT; |
| 681 | spin_lock_irq(&runtime->lock); |
| 682 | status->avail = runtime->avail; |
| 683 | status->xruns = runtime->xruns; |
| 684 | runtime->xruns = 0; |
| 685 | spin_unlock_irq(&runtime->lock); |
| 686 | return 0; |
| 687 | } |
| 688 | |
| 689 | static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 690 | { |
| 691 | snd_rawmidi_file_t *rfile; |
| 692 | void __user *argp = (void __user *)arg; |
| 693 | |
| 694 | rfile = file->private_data; |
| 695 | if (((cmd >> 8) & 0xff) != 'W') |
| 696 | return -ENOTTY; |
| 697 | switch (cmd) { |
| 698 | case SNDRV_RAWMIDI_IOCTL_PVERSION: |
| 699 | return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0; |
| 700 | case SNDRV_RAWMIDI_IOCTL_INFO: |
| 701 | { |
| 702 | snd_rawmidi_stream_t stream; |
| 703 | snd_rawmidi_info_t __user *info = argp; |
| 704 | if (get_user(stream, &info->stream)) |
| 705 | return -EFAULT; |
| 706 | switch (stream) { |
| 707 | case SNDRV_RAWMIDI_STREAM_INPUT: |
| 708 | return snd_rawmidi_info_user(rfile->input, info); |
| 709 | case SNDRV_RAWMIDI_STREAM_OUTPUT: |
| 710 | return snd_rawmidi_info_user(rfile->output, info); |
| 711 | default: |
| 712 | return -EINVAL; |
| 713 | } |
| 714 | } |
| 715 | case SNDRV_RAWMIDI_IOCTL_PARAMS: |
| 716 | { |
| 717 | snd_rawmidi_params_t params; |
| 718 | if (copy_from_user(¶ms, argp, sizeof(snd_rawmidi_params_t))) |
| 719 | return -EFAULT; |
| 720 | switch (params.stream) { |
| 721 | case SNDRV_RAWMIDI_STREAM_OUTPUT: |
| 722 | if (rfile->output == NULL) |
| 723 | return -EINVAL; |
| 724 | return snd_rawmidi_output_params(rfile->output, ¶ms); |
| 725 | case SNDRV_RAWMIDI_STREAM_INPUT: |
| 726 | if (rfile->input == NULL) |
| 727 | return -EINVAL; |
| 728 | return snd_rawmidi_input_params(rfile->input, ¶ms); |
| 729 | default: |
| 730 | return -EINVAL; |
| 731 | } |
| 732 | } |
| 733 | case SNDRV_RAWMIDI_IOCTL_STATUS: |
| 734 | { |
| 735 | int err = 0; |
| 736 | snd_rawmidi_status_t status; |
| 737 | if (copy_from_user(&status, argp, sizeof(snd_rawmidi_status_t))) |
| 738 | return -EFAULT; |
| 739 | switch (status.stream) { |
| 740 | case SNDRV_RAWMIDI_STREAM_OUTPUT: |
| 741 | if (rfile->output == NULL) |
| 742 | return -EINVAL; |
| 743 | err = snd_rawmidi_output_status(rfile->output, &status); |
| 744 | break; |
| 745 | case SNDRV_RAWMIDI_STREAM_INPUT: |
| 746 | if (rfile->input == NULL) |
| 747 | return -EINVAL; |
| 748 | err = snd_rawmidi_input_status(rfile->input, &status); |
| 749 | break; |
| 750 | default: |
| 751 | return -EINVAL; |
| 752 | } |
| 753 | if (err < 0) |
| 754 | return err; |
| 755 | if (copy_to_user(argp, &status, sizeof(snd_rawmidi_status_t))) |
| 756 | return -EFAULT; |
| 757 | return 0; |
| 758 | } |
| 759 | case SNDRV_RAWMIDI_IOCTL_DROP: |
| 760 | { |
| 761 | int val; |
| 762 | if (get_user(val, (int __user *) argp)) |
| 763 | return -EFAULT; |
| 764 | switch (val) { |
| 765 | case SNDRV_RAWMIDI_STREAM_OUTPUT: |
| 766 | if (rfile->output == NULL) |
| 767 | return -EINVAL; |
| 768 | return snd_rawmidi_drop_output(rfile->output); |
| 769 | default: |
| 770 | return -EINVAL; |
| 771 | } |
| 772 | } |
| 773 | case SNDRV_RAWMIDI_IOCTL_DRAIN: |
| 774 | { |
| 775 | int val; |
| 776 | if (get_user(val, (int __user *) argp)) |
| 777 | return -EFAULT; |
| 778 | switch (val) { |
| 779 | case SNDRV_RAWMIDI_STREAM_OUTPUT: |
| 780 | if (rfile->output == NULL) |
| 781 | return -EINVAL; |
| 782 | return snd_rawmidi_drain_output(rfile->output); |
| 783 | case SNDRV_RAWMIDI_STREAM_INPUT: |
| 784 | if (rfile->input == NULL) |
| 785 | return -EINVAL; |
| 786 | return snd_rawmidi_drain_input(rfile->input); |
| 787 | default: |
| 788 | return -EINVAL; |
| 789 | } |
| 790 | } |
| 791 | #ifdef CONFIG_SND_DEBUG |
| 792 | default: |
| 793 | snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd); |
| 794 | #endif |
| 795 | } |
| 796 | return -ENOTTY; |
| 797 | } |
| 798 | |
| 799 | static int snd_rawmidi_control_ioctl(snd_card_t * card, |
| 800 | snd_ctl_file_t * control, |
| 801 | unsigned int cmd, |
| 802 | unsigned long arg) |
| 803 | { |
| 804 | void __user *argp = (void __user *)arg; |
| 805 | unsigned int tmp; |
| 806 | |
| 807 | tmp = card->number * SNDRV_RAWMIDI_DEVICES; |
| 808 | switch (cmd) { |
| 809 | case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE: |
| 810 | { |
| 811 | int device; |
| 812 | |
| 813 | if (get_user(device, (int __user *)argp)) |
| 814 | return -EFAULT; |
| 815 | device = device < 0 ? 0 : device + 1; |
| 816 | while (device < SNDRV_RAWMIDI_DEVICES) { |
| 817 | if (snd_rawmidi_devices[tmp + device]) |
| 818 | break; |
| 819 | device++; |
| 820 | } |
| 821 | if (device == SNDRV_RAWMIDI_DEVICES) |
| 822 | device = -1; |
| 823 | if (put_user(device, (int __user *)argp)) |
| 824 | return -EFAULT; |
| 825 | return 0; |
| 826 | } |
| 827 | case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE: |
| 828 | { |
| 829 | int val; |
| 830 | |
| 831 | if (get_user(val, (int __user *)argp)) |
| 832 | return -EFAULT; |
| 833 | control->prefer_rawmidi_subdevice = val; |
| 834 | return 0; |
| 835 | } |
| 836 | case SNDRV_CTL_IOCTL_RAWMIDI_INFO: |
| 837 | return snd_rawmidi_info_select_user(card, argp); |
| 838 | } |
| 839 | return -ENOIOCTLCMD; |
| 840 | } |
| 841 | |
| 842 | /** |
| 843 | * snd_rawmidi_receive - receive the input data from the device |
| 844 | * @substream: the rawmidi substream |
| 845 | * @buffer: the buffer pointer |
| 846 | * @count: the data size to read |
| 847 | * |
| 848 | * Reads the data from the internal buffer. |
| 849 | * |
| 850 | * Returns the size of read data, or a negative error code on failure. |
| 851 | */ |
| 852 | int snd_rawmidi_receive(snd_rawmidi_substream_t * substream, const unsigned char *buffer, int count) |
| 853 | { |
| 854 | unsigned long flags; |
| 855 | int result = 0, count1; |
| 856 | snd_rawmidi_runtime_t *runtime = substream->runtime; |
| 857 | |
| 858 | if (runtime->buffer == NULL) { |
| 859 | snd_printd("snd_rawmidi_receive: input is not active!!!\n"); |
| 860 | return -EINVAL; |
| 861 | } |
| 862 | spin_lock_irqsave(&runtime->lock, flags); |
| 863 | if (count == 1) { /* special case, faster code */ |
| 864 | substream->bytes++; |
| 865 | if (runtime->avail < runtime->buffer_size) { |
| 866 | runtime->buffer[runtime->hw_ptr++] = buffer[0]; |
| 867 | runtime->hw_ptr %= runtime->buffer_size; |
| 868 | runtime->avail++; |
| 869 | result++; |
| 870 | } else { |
| 871 | runtime->xruns++; |
| 872 | } |
| 873 | } else { |
| 874 | substream->bytes += count; |
| 875 | count1 = runtime->buffer_size - runtime->hw_ptr; |
| 876 | if (count1 > count) |
| 877 | count1 = count; |
| 878 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) |
| 879 | count1 = runtime->buffer_size - runtime->avail; |
| 880 | memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1); |
| 881 | runtime->hw_ptr += count1; |
| 882 | runtime->hw_ptr %= runtime->buffer_size; |
| 883 | runtime->avail += count1; |
| 884 | count -= count1; |
| 885 | result += count1; |
| 886 | if (count > 0) { |
| 887 | buffer += count1; |
| 888 | count1 = count; |
| 889 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) { |
| 890 | count1 = runtime->buffer_size - runtime->avail; |
| 891 | runtime->xruns += count - count1; |
| 892 | } |
| 893 | if (count1 > 0) { |
| 894 | memcpy(runtime->buffer, buffer, count1); |
| 895 | runtime->hw_ptr = count1; |
| 896 | runtime->avail += count1; |
| 897 | result += count1; |
| 898 | } |
| 899 | } |
| 900 | } |
| 901 | if (result > 0) { |
| 902 | if (runtime->event) |
| 903 | tasklet_hi_schedule(&runtime->tasklet); |
| 904 | else if (snd_rawmidi_ready(substream)) |
| 905 | wake_up(&runtime->sleep); |
| 906 | } |
| 907 | spin_unlock_irqrestore(&runtime->lock, flags); |
| 908 | return result; |
| 909 | } |
| 910 | |
| 911 | static long snd_rawmidi_kernel_read1(snd_rawmidi_substream_t *substream, |
| 912 | unsigned char *buf, long count, int kernel) |
| 913 | { |
| 914 | unsigned long flags; |
| 915 | long result = 0, count1; |
| 916 | snd_rawmidi_runtime_t *runtime = substream->runtime; |
| 917 | |
| 918 | while (count > 0 && runtime->avail) { |
| 919 | count1 = runtime->buffer_size - runtime->appl_ptr; |
| 920 | if (count1 > count) |
| 921 | count1 = count; |
| 922 | spin_lock_irqsave(&runtime->lock, flags); |
| 923 | if (count1 > (int)runtime->avail) |
| 924 | count1 = runtime->avail; |
| 925 | if (kernel) { |
| 926 | memcpy(buf + result, runtime->buffer + runtime->appl_ptr, count1); |
| 927 | } else { |
| 928 | spin_unlock_irqrestore(&runtime->lock, flags); |
| 929 | if (copy_to_user((char __user *)buf + result, |
| 930 | runtime->buffer + runtime->appl_ptr, count1)) { |
| 931 | return result > 0 ? result : -EFAULT; |
| 932 | } |
| 933 | spin_lock_irqsave(&runtime->lock, flags); |
| 934 | } |
| 935 | runtime->appl_ptr += count1; |
| 936 | runtime->appl_ptr %= runtime->buffer_size; |
| 937 | runtime->avail -= count1; |
| 938 | spin_unlock_irqrestore(&runtime->lock, flags); |
| 939 | result += count1; |
| 940 | count -= count1; |
| 941 | } |
| 942 | return result; |
| 943 | } |
| 944 | |
| 945 | long snd_rawmidi_kernel_read(snd_rawmidi_substream_t *substream, unsigned char *buf, long count) |
| 946 | { |
| 947 | snd_rawmidi_input_trigger(substream, 1); |
| 948 | return snd_rawmidi_kernel_read1(substream, buf, count, 1); |
| 949 | } |
| 950 | |
| 951 | static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, loff_t *offset) |
| 952 | { |
| 953 | long result; |
| 954 | int count1; |
| 955 | snd_rawmidi_file_t *rfile; |
| 956 | snd_rawmidi_substream_t *substream; |
| 957 | snd_rawmidi_runtime_t *runtime; |
| 958 | |
| 959 | rfile = file->private_data; |
| 960 | substream = rfile->input; |
| 961 | if (substream == NULL) |
| 962 | return -EIO; |
| 963 | runtime = substream->runtime; |
| 964 | snd_rawmidi_input_trigger(substream, 1); |
| 965 | result = 0; |
| 966 | while (count > 0) { |
| 967 | spin_lock_irq(&runtime->lock); |
| 968 | while (!snd_rawmidi_ready(substream)) { |
| 969 | wait_queue_t wait; |
| 970 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { |
| 971 | spin_unlock_irq(&runtime->lock); |
| 972 | return result > 0 ? result : -EAGAIN; |
| 973 | } |
| 974 | init_waitqueue_entry(&wait, current); |
| 975 | add_wait_queue(&runtime->sleep, &wait); |
| 976 | set_current_state(TASK_INTERRUPTIBLE); |
| 977 | spin_unlock_irq(&runtime->lock); |
| 978 | schedule(); |
| 979 | remove_wait_queue(&runtime->sleep, &wait); |
| 980 | if (signal_pending(current)) |
| 981 | return result > 0 ? result : -ERESTARTSYS; |
| 982 | if (!runtime->avail) |
| 983 | return result > 0 ? result : -EIO; |
| 984 | spin_lock_irq(&runtime->lock); |
| 985 | } |
| 986 | spin_unlock_irq(&runtime->lock); |
| 987 | count1 = snd_rawmidi_kernel_read1(substream, (unsigned char *)buf, count, 0); |
| 988 | if (count1 < 0) |
| 989 | return result > 0 ? result : count1; |
| 990 | result += count1; |
| 991 | buf += count1; |
| 992 | count -= count1; |
| 993 | } |
| 994 | return result; |
| 995 | } |
| 996 | |
| 997 | /** |
| 998 | * snd_rawmidi_transmit_empty - check whether the output buffer is empty |
| 999 | * @substream: the rawmidi substream |
| 1000 | * |
| 1001 | * Returns 1 if the internal output buffer is empty, 0 if not. |
| 1002 | */ |
| 1003 | int snd_rawmidi_transmit_empty(snd_rawmidi_substream_t * substream) |
| 1004 | { |
| 1005 | snd_rawmidi_runtime_t *runtime = substream->runtime; |
| 1006 | int result; |
| 1007 | unsigned long flags; |
| 1008 | |
| 1009 | if (runtime->buffer == NULL) { |
| 1010 | snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n"); |
| 1011 | return 1; |
| 1012 | } |
| 1013 | spin_lock_irqsave(&runtime->lock, flags); |
| 1014 | result = runtime->avail >= runtime->buffer_size; |
| 1015 | spin_unlock_irqrestore(&runtime->lock, flags); |
| 1016 | return result; |
| 1017 | } |
| 1018 | |
| 1019 | /** |
| 1020 | * snd_rawmidi_transmit_peek - copy data from the internal buffer |
| 1021 | * @substream: the rawmidi substream |
| 1022 | * @buffer: the buffer pointer |
| 1023 | * @count: data size to transfer |
| 1024 | * |
| 1025 | * Copies data from the internal output buffer to the given buffer. |
| 1026 | * |
| 1027 | * Call this in the interrupt handler when the midi output is ready, |
| 1028 | * and call snd_rawmidi_transmit_ack() after the transmission is |
| 1029 | * finished. |
| 1030 | * |
| 1031 | * Returns the size of copied data, or a negative error code on failure. |
| 1032 | */ |
| 1033 | int snd_rawmidi_transmit_peek(snd_rawmidi_substream_t * substream, unsigned char *buffer, int count) |
| 1034 | { |
| 1035 | unsigned long flags; |
| 1036 | int result, count1; |
| 1037 | snd_rawmidi_runtime_t *runtime = substream->runtime; |
| 1038 | |
| 1039 | if (runtime->buffer == NULL) { |
| 1040 | snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n"); |
| 1041 | return -EINVAL; |
| 1042 | } |
| 1043 | result = 0; |
| 1044 | spin_lock_irqsave(&runtime->lock, flags); |
| 1045 | if (runtime->avail >= runtime->buffer_size) { |
| 1046 | /* warning: lowlevel layer MUST trigger down the hardware */ |
| 1047 | goto __skip; |
| 1048 | } |
| 1049 | if (count == 1) { /* special case, faster code */ |
| 1050 | *buffer = runtime->buffer[runtime->hw_ptr]; |
| 1051 | result++; |
| 1052 | } else { |
| 1053 | count1 = runtime->buffer_size - runtime->hw_ptr; |
| 1054 | if (count1 > count) |
| 1055 | count1 = count; |
| 1056 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) |
| 1057 | count1 = runtime->buffer_size - runtime->avail; |
| 1058 | memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1); |
| 1059 | count -= count1; |
| 1060 | result += count1; |
| 1061 | if (count > 0) { |
| 1062 | if (count > (int)(runtime->buffer_size - runtime->avail - count1)) |
| 1063 | count = runtime->buffer_size - runtime->avail - count1; |
| 1064 | memcpy(buffer + count1, runtime->buffer, count); |
| 1065 | result += count; |
| 1066 | } |
| 1067 | } |
| 1068 | __skip: |
| 1069 | spin_unlock_irqrestore(&runtime->lock, flags); |
| 1070 | return result; |
| 1071 | } |
| 1072 | |
| 1073 | /** |
| 1074 | * snd_rawmidi_transmit_ack - acknowledge the transmission |
| 1075 | * @substream: the rawmidi substream |
| 1076 | * @count: the tranferred count |
| 1077 | * |
| 1078 | * Advances the hardware pointer for the internal output buffer with |
| 1079 | * the given size and updates the condition. |
| 1080 | * Call after the transmission is finished. |
| 1081 | * |
| 1082 | * Returns the advanced size if successful, or a negative error code on failure. |
| 1083 | */ |
| 1084 | int snd_rawmidi_transmit_ack(snd_rawmidi_substream_t * substream, int count) |
| 1085 | { |
| 1086 | unsigned long flags; |
| 1087 | snd_rawmidi_runtime_t *runtime = substream->runtime; |
| 1088 | |
| 1089 | if (runtime->buffer == NULL) { |
| 1090 | snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n"); |
| 1091 | return -EINVAL; |
| 1092 | } |
| 1093 | spin_lock_irqsave(&runtime->lock, flags); |
| 1094 | snd_assert(runtime->avail + count <= runtime->buffer_size, ); |
| 1095 | runtime->hw_ptr += count; |
| 1096 | runtime->hw_ptr %= runtime->buffer_size; |
| 1097 | runtime->avail += count; |
| 1098 | substream->bytes += count; |
| 1099 | if (count > 0) { |
| 1100 | if (runtime->drain || snd_rawmidi_ready(substream)) |
| 1101 | wake_up(&runtime->sleep); |
| 1102 | } |
| 1103 | spin_unlock_irqrestore(&runtime->lock, flags); |
| 1104 | return count; |
| 1105 | } |
| 1106 | |
| 1107 | /** |
| 1108 | * snd_rawmidi_transmit - copy from the buffer to the device |
| 1109 | * @substream: the rawmidi substream |
| 1110 | * @buf: the buffer pointer |
| 1111 | * @count: the data size to transfer |
| 1112 | * |
| 1113 | * Copies data from the buffer to the device and advances the pointer. |
| 1114 | * |
| 1115 | * Returns the copied size if successful, or a negative error code on failure. |
| 1116 | */ |
| 1117 | int snd_rawmidi_transmit(snd_rawmidi_substream_t * substream, unsigned char *buffer, int count) |
| 1118 | { |
| 1119 | count = snd_rawmidi_transmit_peek(substream, buffer, count); |
| 1120 | if (count < 0) |
| 1121 | return count; |
| 1122 | return snd_rawmidi_transmit_ack(substream, count); |
| 1123 | } |
| 1124 | |
| 1125 | static long snd_rawmidi_kernel_write1(snd_rawmidi_substream_t * substream, const unsigned char *buf, long count, int kernel) |
| 1126 | { |
| 1127 | unsigned long flags; |
| 1128 | long count1, result; |
| 1129 | snd_rawmidi_runtime_t *runtime = substream->runtime; |
| 1130 | |
| 1131 | snd_assert(buf != NULL, return -EINVAL); |
| 1132 | snd_assert(runtime->buffer != NULL, return -EINVAL); |
| 1133 | |
| 1134 | result = 0; |
| 1135 | spin_lock_irqsave(&runtime->lock, flags); |
| 1136 | if (substream->append) { |
| 1137 | if ((long)runtime->avail < count) { |
| 1138 | spin_unlock_irqrestore(&runtime->lock, flags); |
| 1139 | return -EAGAIN; |
| 1140 | } |
| 1141 | } |
| 1142 | while (count > 0 && runtime->avail > 0) { |
| 1143 | count1 = runtime->buffer_size - runtime->appl_ptr; |
| 1144 | if (count1 > count) |
| 1145 | count1 = count; |
| 1146 | if (count1 > (long)runtime->avail) |
| 1147 | count1 = runtime->avail; |
| 1148 | if (kernel) { |
| 1149 | memcpy(runtime->buffer + runtime->appl_ptr, buf, count1); |
| 1150 | } else { |
| 1151 | spin_unlock_irqrestore(&runtime->lock, flags); |
| 1152 | if (copy_from_user(runtime->buffer + runtime->appl_ptr, |
| 1153 | (char __user *)buf, count1)) { |
| 1154 | spin_lock_irqsave(&runtime->lock, flags); |
| 1155 | result = result > 0 ? result : -EFAULT; |
| 1156 | goto __end; |
| 1157 | } |
| 1158 | spin_lock_irqsave(&runtime->lock, flags); |
| 1159 | } |
| 1160 | runtime->appl_ptr += count1; |
| 1161 | runtime->appl_ptr %= runtime->buffer_size; |
| 1162 | runtime->avail -= count1; |
| 1163 | result += count1; |
| 1164 | buf += count1; |
| 1165 | count -= count1; |
| 1166 | } |
| 1167 | __end: |
| 1168 | count1 = runtime->avail < runtime->buffer_size; |
| 1169 | spin_unlock_irqrestore(&runtime->lock, flags); |
| 1170 | if (count1) |
| 1171 | snd_rawmidi_output_trigger(substream, 1); |
| 1172 | return result; |
| 1173 | } |
| 1174 | |
| 1175 | long snd_rawmidi_kernel_write(snd_rawmidi_substream_t * substream, const unsigned char *buf, long count) |
| 1176 | { |
| 1177 | return snd_rawmidi_kernel_write1(substream, buf, count, 1); |
| 1178 | } |
| 1179 | |
| 1180 | static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) |
| 1181 | { |
| 1182 | long result, timeout; |
| 1183 | int count1; |
| 1184 | snd_rawmidi_file_t *rfile; |
| 1185 | snd_rawmidi_runtime_t *runtime; |
| 1186 | snd_rawmidi_substream_t *substream; |
| 1187 | |
| 1188 | rfile = file->private_data; |
| 1189 | substream = rfile->output; |
| 1190 | runtime = substream->runtime; |
| 1191 | /* we cannot put an atomic message to our buffer */ |
| 1192 | if (substream->append && count > runtime->buffer_size) |
| 1193 | return -EIO; |
| 1194 | result = 0; |
| 1195 | while (count > 0) { |
| 1196 | spin_lock_irq(&runtime->lock); |
| 1197 | while (!snd_rawmidi_ready_append(substream, count)) { |
| 1198 | wait_queue_t wait; |
| 1199 | if (file->f_flags & O_NONBLOCK) { |
| 1200 | spin_unlock_irq(&runtime->lock); |
| 1201 | return result > 0 ? result : -EAGAIN; |
| 1202 | } |
| 1203 | init_waitqueue_entry(&wait, current); |
| 1204 | add_wait_queue(&runtime->sleep, &wait); |
| 1205 | set_current_state(TASK_INTERRUPTIBLE); |
| 1206 | spin_unlock_irq(&runtime->lock); |
| 1207 | timeout = schedule_timeout(30 * HZ); |
| 1208 | remove_wait_queue(&runtime->sleep, &wait); |
| 1209 | if (signal_pending(current)) |
| 1210 | return result > 0 ? result : -ERESTARTSYS; |
| 1211 | if (!runtime->avail && !timeout) |
| 1212 | return result > 0 ? result : -EIO; |
| 1213 | spin_lock_irq(&runtime->lock); |
| 1214 | } |
| 1215 | spin_unlock_irq(&runtime->lock); |
| 1216 | count1 = snd_rawmidi_kernel_write1(substream, (unsigned char *)buf, count, 0); |
| 1217 | if (count1 < 0) |
| 1218 | return result > 0 ? result : count1; |
| 1219 | result += count1; |
| 1220 | buf += count1; |
| 1221 | if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK)) |
| 1222 | break; |
| 1223 | count -= count1; |
| 1224 | } |
| 1225 | if (file->f_flags & O_SYNC) { |
| 1226 | spin_lock_irq(&runtime->lock); |
| 1227 | while (runtime->avail != runtime->buffer_size) { |
| 1228 | wait_queue_t wait; |
| 1229 | unsigned int last_avail = runtime->avail; |
| 1230 | init_waitqueue_entry(&wait, current); |
| 1231 | add_wait_queue(&runtime->sleep, &wait); |
| 1232 | set_current_state(TASK_INTERRUPTIBLE); |
| 1233 | spin_unlock_irq(&runtime->lock); |
| 1234 | timeout = schedule_timeout(30 * HZ); |
| 1235 | remove_wait_queue(&runtime->sleep, &wait); |
| 1236 | if (signal_pending(current)) |
| 1237 | return result > 0 ? result : -ERESTARTSYS; |
| 1238 | if (runtime->avail == last_avail && !timeout) |
| 1239 | return result > 0 ? result : -EIO; |
| 1240 | spin_lock_irq(&runtime->lock); |
| 1241 | } |
| 1242 | spin_unlock_irq(&runtime->lock); |
| 1243 | } |
| 1244 | return result; |
| 1245 | } |
| 1246 | |
| 1247 | static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait) |
| 1248 | { |
| 1249 | snd_rawmidi_file_t *rfile; |
| 1250 | snd_rawmidi_runtime_t *runtime; |
| 1251 | unsigned int mask; |
| 1252 | |
| 1253 | rfile = file->private_data; |
| 1254 | if (rfile->input != NULL) { |
| 1255 | runtime = rfile->input->runtime; |
| 1256 | snd_rawmidi_input_trigger(rfile->input, 1); |
| 1257 | poll_wait(file, &runtime->sleep, wait); |
| 1258 | } |
| 1259 | if (rfile->output != NULL) { |
| 1260 | runtime = rfile->output->runtime; |
| 1261 | poll_wait(file, &runtime->sleep, wait); |
| 1262 | } |
| 1263 | mask = 0; |
| 1264 | if (rfile->input != NULL) { |
| 1265 | if (snd_rawmidi_ready(rfile->input)) |
| 1266 | mask |= POLLIN | POLLRDNORM; |
| 1267 | } |
| 1268 | if (rfile->output != NULL) { |
| 1269 | if (snd_rawmidi_ready(rfile->output)) |
| 1270 | mask |= POLLOUT | POLLWRNORM; |
| 1271 | } |
| 1272 | return mask; |
| 1273 | } |
| 1274 | |
| 1275 | /* |
| 1276 | */ |
| 1277 | #ifdef CONFIG_COMPAT |
| 1278 | #include "rawmidi_compat.c" |
| 1279 | #else |
| 1280 | #define snd_rawmidi_ioctl_compat NULL |
| 1281 | #endif |
| 1282 | |
| 1283 | /* |
| 1284 | |
| 1285 | */ |
| 1286 | |
| 1287 | static void snd_rawmidi_proc_info_read(snd_info_entry_t *entry, |
| 1288 | snd_info_buffer_t * buffer) |
| 1289 | { |
| 1290 | snd_rawmidi_t *rmidi; |
| 1291 | snd_rawmidi_substream_t *substream; |
| 1292 | snd_rawmidi_runtime_t *runtime; |
| 1293 | struct list_head *list; |
| 1294 | |
| 1295 | rmidi = entry->private_data; |
| 1296 | snd_iprintf(buffer, "%s\n\n", rmidi->name); |
| 1297 | down(&rmidi->open_mutex); |
| 1298 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { |
| 1299 | list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) { |
| 1300 | substream = list_entry(list, snd_rawmidi_substream_t, list); |
| 1301 | snd_iprintf(buffer, |
| 1302 | "Output %d\n" |
| 1303 | " Tx bytes : %lu\n", |
| 1304 | substream->number, |
| 1305 | (unsigned long) substream->bytes); |
| 1306 | if (substream->opened) { |
| 1307 | runtime = substream->runtime; |
| 1308 | snd_iprintf(buffer, |
| 1309 | " Mode : %s\n" |
| 1310 | " Buffer size : %lu\n" |
| 1311 | " Avail : %lu\n", |
| 1312 | runtime->oss ? "OSS compatible" : "native", |
| 1313 | (unsigned long) runtime->buffer_size, |
| 1314 | (unsigned long) runtime->avail); |
| 1315 | } |
| 1316 | } |
| 1317 | } |
| 1318 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) { |
| 1319 | list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) { |
| 1320 | substream = list_entry(list, snd_rawmidi_substream_t, list); |
| 1321 | snd_iprintf(buffer, |
| 1322 | "Input %d\n" |
| 1323 | " Rx bytes : %lu\n", |
| 1324 | substream->number, |
| 1325 | (unsigned long) substream->bytes); |
| 1326 | if (substream->opened) { |
| 1327 | runtime = substream->runtime; |
| 1328 | snd_iprintf(buffer, |
| 1329 | " Buffer size : %lu\n" |
| 1330 | " Avail : %lu\n" |
| 1331 | " Overruns : %lu\n", |
| 1332 | (unsigned long) runtime->buffer_size, |
| 1333 | (unsigned long) runtime->avail, |
| 1334 | (unsigned long) runtime->xruns); |
| 1335 | } |
| 1336 | } |
| 1337 | } |
| 1338 | up(&rmidi->open_mutex); |
| 1339 | } |
| 1340 | |
| 1341 | /* |
| 1342 | * Register functions |
| 1343 | */ |
| 1344 | |
| 1345 | static struct file_operations snd_rawmidi_f_ops = |
| 1346 | { |
| 1347 | .owner = THIS_MODULE, |
| 1348 | .read = snd_rawmidi_read, |
| 1349 | .write = snd_rawmidi_write, |
| 1350 | .open = snd_rawmidi_open, |
| 1351 | .release = snd_rawmidi_release, |
| 1352 | .poll = snd_rawmidi_poll, |
| 1353 | .unlocked_ioctl = snd_rawmidi_ioctl, |
| 1354 | .compat_ioctl = snd_rawmidi_ioctl_compat, |
| 1355 | }; |
| 1356 | |
| 1357 | static snd_minor_t snd_rawmidi_reg = |
| 1358 | { |
| 1359 | .comment = "raw midi", |
| 1360 | .f_ops = &snd_rawmidi_f_ops, |
| 1361 | }; |
| 1362 | |
| 1363 | static int snd_rawmidi_alloc_substreams(snd_rawmidi_t *rmidi, |
| 1364 | snd_rawmidi_str_t *stream, |
| 1365 | int direction, |
| 1366 | int count) |
| 1367 | { |
| 1368 | snd_rawmidi_substream_t *substream; |
| 1369 | int idx; |
| 1370 | |
| 1371 | INIT_LIST_HEAD(&stream->substreams); |
| 1372 | for (idx = 0; idx < count; idx++) { |
| 1373 | substream = kcalloc(1, sizeof(*substream), GFP_KERNEL); |
| 1374 | if (substream == NULL) |
| 1375 | return -ENOMEM; |
| 1376 | substream->stream = direction; |
| 1377 | substream->number = idx; |
| 1378 | substream->rmidi = rmidi; |
| 1379 | substream->pstr = stream; |
| 1380 | list_add_tail(&substream->list, &stream->substreams); |
| 1381 | stream->substream_count++; |
| 1382 | } |
| 1383 | return 0; |
| 1384 | } |
| 1385 | |
| 1386 | /** |
| 1387 | * snd_rawmidi_new - create a rawmidi instance |
| 1388 | * @card: the card instance |
| 1389 | * @id: the id string |
| 1390 | * @device: the device index |
| 1391 | * @output_count: the number of output streams |
| 1392 | * @input_count: the number of input streams |
| 1393 | * @rrawmidi: the pointer to store the new rawmidi instance |
| 1394 | * |
| 1395 | * Creates a new rawmidi instance. |
| 1396 | * Use snd_rawmidi_set_ops() to set the operators to the new instance. |
| 1397 | * |
| 1398 | * Returns zero if successful, or a negative error code on failure. |
| 1399 | */ |
| 1400 | int snd_rawmidi_new(snd_card_t * card, char *id, int device, |
| 1401 | int output_count, int input_count, |
| 1402 | snd_rawmidi_t ** rrawmidi) |
| 1403 | { |
| 1404 | snd_rawmidi_t *rmidi; |
| 1405 | int err; |
| 1406 | static snd_device_ops_t ops = { |
| 1407 | .dev_free = snd_rawmidi_dev_free, |
| 1408 | .dev_register = snd_rawmidi_dev_register, |
| 1409 | .dev_disconnect = snd_rawmidi_dev_disconnect, |
| 1410 | .dev_unregister = snd_rawmidi_dev_unregister |
| 1411 | }; |
| 1412 | |
| 1413 | snd_assert(rrawmidi != NULL, return -EINVAL); |
| 1414 | *rrawmidi = NULL; |
| 1415 | snd_assert(card != NULL, return -ENXIO); |
| 1416 | rmidi = kcalloc(1, sizeof(*rmidi), GFP_KERNEL); |
| 1417 | if (rmidi == NULL) |
| 1418 | return -ENOMEM; |
| 1419 | rmidi->card = card; |
| 1420 | rmidi->device = device; |
| 1421 | init_MUTEX(&rmidi->open_mutex); |
| 1422 | init_waitqueue_head(&rmidi->open_wait); |
| 1423 | if (id != NULL) |
| 1424 | strlcpy(rmidi->id, id, sizeof(rmidi->id)); |
| 1425 | if ((err = snd_rawmidi_alloc_substreams(rmidi, &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], SNDRV_RAWMIDI_STREAM_INPUT, input_count)) < 0) { |
| 1426 | snd_rawmidi_free(rmidi); |
| 1427 | return err; |
| 1428 | } |
| 1429 | if ((err = snd_rawmidi_alloc_substreams(rmidi, &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], SNDRV_RAWMIDI_STREAM_OUTPUT, output_count)) < 0) { |
| 1430 | snd_rawmidi_free(rmidi); |
| 1431 | return err; |
| 1432 | } |
| 1433 | if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) { |
| 1434 | snd_rawmidi_free(rmidi); |
| 1435 | return err; |
| 1436 | } |
| 1437 | *rrawmidi = rmidi; |
| 1438 | return 0; |
| 1439 | } |
| 1440 | |
| 1441 | static void snd_rawmidi_free_substreams(snd_rawmidi_str_t *stream) |
| 1442 | { |
| 1443 | snd_rawmidi_substream_t *substream; |
| 1444 | |
| 1445 | while (!list_empty(&stream->substreams)) { |
| 1446 | substream = list_entry(stream->substreams.next, snd_rawmidi_substream_t, list); |
| 1447 | list_del(&substream->list); |
| 1448 | kfree(substream); |
| 1449 | } |
| 1450 | } |
| 1451 | |
| 1452 | static int snd_rawmidi_free(snd_rawmidi_t *rmidi) |
| 1453 | { |
| 1454 | snd_assert(rmidi != NULL, return -ENXIO); |
| 1455 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); |
| 1456 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); |
| 1457 | if (rmidi->private_free) |
| 1458 | rmidi->private_free(rmidi); |
| 1459 | kfree(rmidi); |
| 1460 | return 0; |
| 1461 | } |
| 1462 | |
| 1463 | static int snd_rawmidi_dev_free(snd_device_t *device) |
| 1464 | { |
| 1465 | snd_rawmidi_t *rmidi = device->device_data; |
| 1466 | return snd_rawmidi_free(rmidi); |
| 1467 | } |
| 1468 | |
| 1469 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) |
| 1470 | static void snd_rawmidi_dev_seq_free(snd_seq_device_t *device) |
| 1471 | { |
| 1472 | snd_rawmidi_t *rmidi = device->private_data; |
| 1473 | rmidi->seq_dev = NULL; |
| 1474 | } |
| 1475 | #endif |
| 1476 | |
| 1477 | static int snd_rawmidi_dev_register(snd_device_t *device) |
| 1478 | { |
| 1479 | int idx, err; |
| 1480 | snd_info_entry_t *entry; |
| 1481 | char name[16]; |
| 1482 | snd_rawmidi_t *rmidi = device->device_data; |
| 1483 | |
| 1484 | if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) |
| 1485 | return -ENOMEM; |
| 1486 | down(®ister_mutex); |
| 1487 | idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device; |
| 1488 | if (snd_rawmidi_devices[idx] != NULL) { |
| 1489 | up(®ister_mutex); |
| 1490 | return -EBUSY; |
| 1491 | } |
| 1492 | snd_rawmidi_devices[idx] = rmidi; |
| 1493 | sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device); |
| 1494 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI, |
| 1495 | rmidi->card, rmidi->device, |
| 1496 | &snd_rawmidi_reg, name)) < 0) { |
| 1497 | snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device); |
| 1498 | snd_rawmidi_devices[idx] = NULL; |
| 1499 | up(®ister_mutex); |
| 1500 | return err; |
| 1501 | } |
| 1502 | if (rmidi->ops && rmidi->ops->dev_register && |
| 1503 | (err = rmidi->ops->dev_register(rmidi)) < 0) { |
| 1504 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); |
| 1505 | snd_rawmidi_devices[idx] = NULL; |
| 1506 | up(®ister_mutex); |
| 1507 | return err; |
| 1508 | } |
| 1509 | #ifdef CONFIG_SND_OSSEMUL |
| 1510 | rmidi->ossreg = 0; |
| 1511 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { |
| 1512 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, |
| 1513 | rmidi->card, 0, &snd_rawmidi_reg, name) < 0) { |
| 1514 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0); |
| 1515 | } else { |
| 1516 | rmidi->ossreg++; |
| 1517 | #ifdef SNDRV_OSS_INFO_DEV_MIDI |
| 1518 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name); |
| 1519 | #endif |
| 1520 | } |
| 1521 | } |
| 1522 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) { |
| 1523 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, |
| 1524 | rmidi->card, 1, &snd_rawmidi_reg, name) < 0) { |
| 1525 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1); |
| 1526 | } else { |
| 1527 | rmidi->ossreg++; |
| 1528 | } |
| 1529 | } |
| 1530 | #endif /* CONFIG_SND_OSSEMUL */ |
| 1531 | up(®ister_mutex); |
| 1532 | sprintf(name, "midi%d", rmidi->device); |
| 1533 | entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root); |
| 1534 | if (entry) { |
| 1535 | entry->private_data = rmidi; |
| 1536 | entry->c.text.read_size = 1024; |
| 1537 | entry->c.text.read = snd_rawmidi_proc_info_read; |
| 1538 | if (snd_info_register(entry) < 0) { |
| 1539 | snd_info_free_entry(entry); |
| 1540 | entry = NULL; |
| 1541 | } |
| 1542 | } |
| 1543 | rmidi->proc_entry = entry; |
| 1544 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) |
| 1545 | if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */ |
| 1546 | if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) { |
| 1547 | rmidi->seq_dev->private_data = rmidi; |
| 1548 | rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free; |
| 1549 | sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device); |
| 1550 | snd_device_register(rmidi->card, rmidi->seq_dev); |
| 1551 | } |
| 1552 | } |
| 1553 | #endif |
| 1554 | return 0; |
| 1555 | } |
| 1556 | |
| 1557 | static int snd_rawmidi_dev_disconnect(snd_device_t *device) |
| 1558 | { |
| 1559 | snd_rawmidi_t *rmidi = device->device_data; |
| 1560 | int idx; |
| 1561 | |
| 1562 | down(®ister_mutex); |
| 1563 | idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device; |
| 1564 | snd_rawmidi_devices[idx] = NULL; |
| 1565 | up(®ister_mutex); |
| 1566 | return 0; |
| 1567 | } |
| 1568 | |
| 1569 | static int snd_rawmidi_dev_unregister(snd_device_t *device) |
| 1570 | { |
| 1571 | int idx; |
| 1572 | snd_rawmidi_t *rmidi = device->device_data; |
| 1573 | |
| 1574 | snd_assert(rmidi != NULL, return -ENXIO); |
| 1575 | down(®ister_mutex); |
| 1576 | idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device; |
| 1577 | snd_rawmidi_devices[idx] = NULL; |
| 1578 | if (rmidi->proc_entry) { |
| 1579 | snd_info_unregister(rmidi->proc_entry); |
| 1580 | rmidi->proc_entry = NULL; |
| 1581 | } |
| 1582 | #ifdef CONFIG_SND_OSSEMUL |
| 1583 | if (rmidi->ossreg) { |
| 1584 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { |
| 1585 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0); |
| 1586 | #ifdef SNDRV_OSS_INFO_DEV_MIDI |
| 1587 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number); |
| 1588 | #endif |
| 1589 | } |
| 1590 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) |
| 1591 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1); |
| 1592 | rmidi->ossreg = 0; |
| 1593 | } |
| 1594 | #endif /* CONFIG_SND_OSSEMUL */ |
| 1595 | if (rmidi->ops && rmidi->ops->dev_unregister) |
| 1596 | rmidi->ops->dev_unregister(rmidi); |
| 1597 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); |
| 1598 | up(®ister_mutex); |
| 1599 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) |
| 1600 | if (rmidi->seq_dev) { |
| 1601 | snd_device_free(rmidi->card, rmidi->seq_dev); |
| 1602 | rmidi->seq_dev = NULL; |
| 1603 | } |
| 1604 | #endif |
| 1605 | return snd_rawmidi_free(rmidi); |
| 1606 | } |
| 1607 | |
| 1608 | /** |
| 1609 | * snd_rawmidi_set_ops - set the rawmidi operators |
| 1610 | * @rmidi: the rawmidi instance |
| 1611 | * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX |
| 1612 | * @ops: the operator table |
| 1613 | * |
| 1614 | * Sets the rawmidi operators for the given stream direction. |
| 1615 | */ |
| 1616 | void snd_rawmidi_set_ops(snd_rawmidi_t *rmidi, int stream, snd_rawmidi_ops_t *ops) |
| 1617 | { |
| 1618 | struct list_head *list; |
| 1619 | snd_rawmidi_substream_t *substream; |
| 1620 | |
| 1621 | list_for_each(list, &rmidi->streams[stream].substreams) { |
| 1622 | substream = list_entry(list, snd_rawmidi_substream_t, list); |
| 1623 | substream->ops = ops; |
| 1624 | } |
| 1625 | } |
| 1626 | |
| 1627 | /* |
| 1628 | * ENTRY functions |
| 1629 | */ |
| 1630 | |
| 1631 | static int __init alsa_rawmidi_init(void) |
| 1632 | { |
| 1633 | |
| 1634 | snd_ctl_register_ioctl(snd_rawmidi_control_ioctl); |
| 1635 | snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl); |
| 1636 | #ifdef CONFIG_SND_OSSEMUL |
| 1637 | { int i; |
| 1638 | /* check device map table */ |
| 1639 | for (i = 0; i < SNDRV_CARDS; i++) { |
| 1640 | if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) { |
| 1641 | snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]); |
| 1642 | midi_map[i] = 0; |
| 1643 | } |
| 1644 | if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) { |
| 1645 | snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]); |
| 1646 | amidi_map[i] = 1; |
| 1647 | } |
| 1648 | } |
| 1649 | } |
| 1650 | #endif /* CONFIG_SND_OSSEMUL */ |
| 1651 | return 0; |
| 1652 | } |
| 1653 | |
| 1654 | static void __exit alsa_rawmidi_exit(void) |
| 1655 | { |
| 1656 | snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl); |
| 1657 | snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl); |
| 1658 | } |
| 1659 | |
| 1660 | module_init(alsa_rawmidi_init) |
| 1661 | module_exit(alsa_rawmidi_exit) |
| 1662 | |
| 1663 | EXPORT_SYMBOL(snd_rawmidi_output_params); |
| 1664 | EXPORT_SYMBOL(snd_rawmidi_input_params); |
| 1665 | EXPORT_SYMBOL(snd_rawmidi_drop_output); |
| 1666 | EXPORT_SYMBOL(snd_rawmidi_drain_output); |
| 1667 | EXPORT_SYMBOL(snd_rawmidi_drain_input); |
| 1668 | EXPORT_SYMBOL(snd_rawmidi_receive); |
| 1669 | EXPORT_SYMBOL(snd_rawmidi_transmit_empty); |
| 1670 | EXPORT_SYMBOL(snd_rawmidi_transmit_peek); |
| 1671 | EXPORT_SYMBOL(snd_rawmidi_transmit_ack); |
| 1672 | EXPORT_SYMBOL(snd_rawmidi_transmit); |
| 1673 | EXPORT_SYMBOL(snd_rawmidi_new); |
| 1674 | EXPORT_SYMBOL(snd_rawmidi_set_ops); |
| 1675 | EXPORT_SYMBOL(snd_rawmidi_info); |
| 1676 | EXPORT_SYMBOL(snd_rawmidi_info_select); |
| 1677 | EXPORT_SYMBOL(snd_rawmidi_kernel_open); |
| 1678 | EXPORT_SYMBOL(snd_rawmidi_kernel_release); |
| 1679 | EXPORT_SYMBOL(snd_rawmidi_kernel_read); |
| 1680 | EXPORT_SYMBOL(snd_rawmidi_kernel_write); |