Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Virtual Raw MIDI client on Sequencer |
| 3 | * |
| 4 | * Copyright (c) 2000 by Takashi Iwai <tiwai@suse.de>, |
| 5 | * Jaroslav Kysela <perex@perex.cz> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | /* |
| 24 | * Virtual Raw MIDI client |
| 25 | * |
| 26 | * The virtual rawmidi client is a sequencer client which associate |
| 27 | * a rawmidi device file. The created rawmidi device file can be |
| 28 | * accessed as a normal raw midi, but its MIDI source and destination |
| 29 | * are arbitrary. For example, a user-client software synth connected |
| 30 | * to this port can be used as a normal midi device as well. |
| 31 | * |
| 32 | * The virtual rawmidi device accepts also multiple opens. Each file |
| 33 | * has its own input buffer, so that no conflict would occur. The drain |
| 34 | * of input/output buffer acts only to the local buffer. |
| 35 | * |
| 36 | */ |
| 37 | |
| 38 | #include <sound/driver.h> |
| 39 | #include <linux/init.h> |
| 40 | #include <linux/wait.h> |
| 41 | #include <linux/sched.h> |
| 42 | #include <linux/slab.h> |
| 43 | #include <sound/core.h> |
| 44 | #include <sound/rawmidi.h> |
| 45 | #include <sound/info.h> |
| 46 | #include <sound/control.h> |
| 47 | #include <sound/minors.h> |
| 48 | #include <sound/seq_kernel.h> |
| 49 | #include <sound/seq_midi_event.h> |
| 50 | #include <sound/seq_virmidi.h> |
| 51 | |
| 52 | MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>"); |
| 53 | MODULE_DESCRIPTION("Virtual Raw MIDI client on Sequencer"); |
| 54 | MODULE_LICENSE("GPL"); |
| 55 | |
| 56 | /* |
| 57 | * initialize an event record |
| 58 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 59 | static void snd_virmidi_init_event(struct snd_virmidi *vmidi, |
| 60 | struct snd_seq_event *ev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | { |
| 62 | memset(ev, 0, sizeof(*ev)); |
| 63 | ev->source.port = vmidi->port; |
| 64 | switch (vmidi->seq_mode) { |
| 65 | case SNDRV_VIRMIDI_SEQ_DISPATCH: |
| 66 | ev->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; |
| 67 | break; |
| 68 | case SNDRV_VIRMIDI_SEQ_ATTACH: |
| 69 | /* FIXME: source and destination are same - not good.. */ |
| 70 | ev->dest.client = vmidi->client; |
| 71 | ev->dest.port = vmidi->port; |
| 72 | break; |
| 73 | } |
| 74 | ev->type = SNDRV_SEQ_EVENT_NONE; |
| 75 | } |
| 76 | |
| 77 | /* |
| 78 | * decode input event and put to read buffer of each opened file |
| 79 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 80 | static int snd_virmidi_dev_receive_event(struct snd_virmidi_dev *rdev, |
| 81 | struct snd_seq_event *ev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 83 | struct snd_virmidi *vmidi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | struct list_head *list; |
| 85 | unsigned char msg[4]; |
| 86 | int len; |
| 87 | |
| 88 | read_lock(&rdev->filelist_lock); |
| 89 | list_for_each(list, &rdev->filelist) { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 90 | vmidi = list_entry(list, struct snd_virmidi, list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | if (!vmidi->trigger) |
| 92 | continue; |
| 93 | if (ev->type == SNDRV_SEQ_EVENT_SYSEX) { |
| 94 | if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) != SNDRV_SEQ_EVENT_LENGTH_VARIABLE) |
| 95 | continue; |
| 96 | snd_seq_dump_var_event(ev, (snd_seq_dump_func_t)snd_rawmidi_receive, vmidi->substream); |
| 97 | } else { |
| 98 | len = snd_midi_event_decode(vmidi->parser, msg, sizeof(msg), ev); |
| 99 | if (len > 0) |
| 100 | snd_rawmidi_receive(vmidi->substream, msg, len); |
| 101 | } |
| 102 | } |
| 103 | read_unlock(&rdev->filelist_lock); |
| 104 | |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | /* |
| 109 | * receive an event from the remote virmidi port |
| 110 | * |
| 111 | * for rawmidi inputs, you can call this function from the event |
| 112 | * handler of a remote port which is attached to the virmidi via |
| 113 | * SNDRV_VIRMIDI_SEQ_ATTACH. |
| 114 | */ |
Adrian Bunk | 123992f | 2005-05-18 18:02:04 +0200 | [diff] [blame] | 115 | #if 0 |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 116 | int snd_virmidi_receive(struct snd_rawmidi *rmidi, struct snd_seq_event *ev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 118 | struct snd_virmidi_dev *rdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
| 120 | rdev = rmidi->private_data; |
| 121 | return snd_virmidi_dev_receive_event(rdev, ev); |
| 122 | } |
Adrian Bunk | 123992f | 2005-05-18 18:02:04 +0200 | [diff] [blame] | 123 | #endif /* 0 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
| 125 | /* |
| 126 | * event handler of virmidi port |
| 127 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 128 | static int snd_virmidi_event_input(struct snd_seq_event *ev, int direct, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | void *private_data, int atomic, int hop) |
| 130 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 131 | struct snd_virmidi_dev *rdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | |
| 133 | rdev = private_data; |
| 134 | if (!(rdev->flags & SNDRV_VIRMIDI_USE)) |
| 135 | return 0; /* ignored */ |
| 136 | return snd_virmidi_dev_receive_event(rdev, ev); |
| 137 | } |
| 138 | |
| 139 | /* |
| 140 | * trigger rawmidi stream for input |
| 141 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 142 | static void snd_virmidi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 144 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
| 146 | if (up) { |
| 147 | vmidi->trigger = 1; |
| 148 | } else { |
| 149 | vmidi->trigger = 0; |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | /* |
| 154 | * trigger rawmidi stream for output |
| 155 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 156 | static void snd_virmidi_output_trigger(struct snd_rawmidi_substream *substream, int up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 158 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | int count, res; |
| 160 | unsigned char buf[32], *pbuf; |
| 161 | |
| 162 | if (up) { |
| 163 | vmidi->trigger = 1; |
| 164 | if (vmidi->seq_mode == SNDRV_VIRMIDI_SEQ_DISPATCH && |
| 165 | !(vmidi->rdev->flags & SNDRV_VIRMIDI_SUBSCRIBE)) { |
| 166 | snd_rawmidi_transmit_ack(substream, substream->runtime->buffer_size - substream->runtime->avail); |
| 167 | return; /* ignored */ |
| 168 | } |
| 169 | if (vmidi->event.type != SNDRV_SEQ_EVENT_NONE) { |
Takashi Iwai | 62c5549e | 2006-02-22 17:14:34 +0100 | [diff] [blame^] | 170 | if (snd_seq_kernel_client_dispatch(vmidi->client, &vmidi->event, in_atomic(), 0) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | return; |
| 172 | vmidi->event.type = SNDRV_SEQ_EVENT_NONE; |
| 173 | } |
| 174 | while (1) { |
| 175 | count = snd_rawmidi_transmit_peek(substream, buf, sizeof(buf)); |
| 176 | if (count <= 0) |
| 177 | break; |
| 178 | pbuf = buf; |
| 179 | while (count > 0) { |
| 180 | res = snd_midi_event_encode(vmidi->parser, pbuf, count, &vmidi->event); |
| 181 | if (res < 0) { |
| 182 | snd_midi_event_reset_encode(vmidi->parser); |
| 183 | continue; |
| 184 | } |
| 185 | snd_rawmidi_transmit_ack(substream, res); |
| 186 | pbuf += res; |
| 187 | count -= res; |
| 188 | if (vmidi->event.type != SNDRV_SEQ_EVENT_NONE) { |
Takashi Iwai | 62c5549e | 2006-02-22 17:14:34 +0100 | [diff] [blame^] | 189 | if (snd_seq_kernel_client_dispatch(vmidi->client, &vmidi->event, in_atomic(), 0) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | return; |
| 191 | vmidi->event.type = SNDRV_SEQ_EVENT_NONE; |
| 192 | } |
| 193 | } |
| 194 | } |
| 195 | } else { |
| 196 | vmidi->trigger = 0; |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * open rawmidi handle for input |
| 202 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 203 | static int snd_virmidi_input_open(struct snd_rawmidi_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 205 | struct snd_virmidi_dev *rdev = substream->rmidi->private_data; |
| 206 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
| 207 | struct snd_virmidi *vmidi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | unsigned long flags; |
| 209 | |
Takashi Iwai | ecca82b | 2005-09-09 14:20:49 +0200 | [diff] [blame] | 210 | vmidi = kzalloc(sizeof(*vmidi), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | if (vmidi == NULL) |
| 212 | return -ENOMEM; |
| 213 | vmidi->substream = substream; |
| 214 | if (snd_midi_event_new(0, &vmidi->parser) < 0) { |
| 215 | kfree(vmidi); |
| 216 | return -ENOMEM; |
| 217 | } |
| 218 | vmidi->seq_mode = rdev->seq_mode; |
| 219 | vmidi->client = rdev->client; |
| 220 | vmidi->port = rdev->port; |
| 221 | runtime->private_data = vmidi; |
| 222 | write_lock_irqsave(&rdev->filelist_lock, flags); |
| 223 | list_add_tail(&vmidi->list, &rdev->filelist); |
| 224 | write_unlock_irqrestore(&rdev->filelist_lock, flags); |
| 225 | vmidi->rdev = rdev; |
| 226 | return 0; |
| 227 | } |
| 228 | |
| 229 | /* |
| 230 | * open rawmidi handle for output |
| 231 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 232 | static int snd_virmidi_output_open(struct snd_rawmidi_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 234 | struct snd_virmidi_dev *rdev = substream->rmidi->private_data; |
| 235 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
| 236 | struct snd_virmidi *vmidi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | |
Takashi Iwai | ecca82b | 2005-09-09 14:20:49 +0200 | [diff] [blame] | 238 | vmidi = kzalloc(sizeof(*vmidi), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | if (vmidi == NULL) |
| 240 | return -ENOMEM; |
| 241 | vmidi->substream = substream; |
| 242 | if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &vmidi->parser) < 0) { |
| 243 | kfree(vmidi); |
| 244 | return -ENOMEM; |
| 245 | } |
| 246 | vmidi->seq_mode = rdev->seq_mode; |
| 247 | vmidi->client = rdev->client; |
| 248 | vmidi->port = rdev->port; |
| 249 | snd_virmidi_init_event(vmidi, &vmidi->event); |
| 250 | vmidi->rdev = rdev; |
| 251 | runtime->private_data = vmidi; |
| 252 | return 0; |
| 253 | } |
| 254 | |
| 255 | /* |
| 256 | * close rawmidi handle for input |
| 257 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 258 | static int snd_virmidi_input_close(struct snd_rawmidi_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 260 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | snd_midi_event_free(vmidi->parser); |
| 262 | list_del(&vmidi->list); |
| 263 | substream->runtime->private_data = NULL; |
| 264 | kfree(vmidi); |
| 265 | return 0; |
| 266 | } |
| 267 | |
| 268 | /* |
| 269 | * close rawmidi handle for output |
| 270 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 271 | static int snd_virmidi_output_close(struct snd_rawmidi_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 273 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | snd_midi_event_free(vmidi->parser); |
| 275 | substream->runtime->private_data = NULL; |
| 276 | kfree(vmidi); |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | /* |
| 281 | * subscribe callback - allow output to rawmidi device |
| 282 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 283 | static int snd_virmidi_subscribe(void *private_data, |
| 284 | struct snd_seq_port_subscribe *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 286 | struct snd_virmidi_dev *rdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
| 288 | rdev = private_data; |
| 289 | if (!try_module_get(rdev->card->module)) |
| 290 | return -EFAULT; |
| 291 | rdev->flags |= SNDRV_VIRMIDI_SUBSCRIBE; |
| 292 | return 0; |
| 293 | } |
| 294 | |
| 295 | /* |
| 296 | * unsubscribe callback - disallow output to rawmidi device |
| 297 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 298 | static int snd_virmidi_unsubscribe(void *private_data, |
| 299 | struct snd_seq_port_subscribe *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 301 | struct snd_virmidi_dev *rdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | |
| 303 | rdev = private_data; |
| 304 | rdev->flags &= ~SNDRV_VIRMIDI_SUBSCRIBE; |
| 305 | module_put(rdev->card->module); |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | |
| 310 | /* |
| 311 | * use callback - allow input to rawmidi device |
| 312 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 313 | static int snd_virmidi_use(void *private_data, |
| 314 | struct snd_seq_port_subscribe *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 316 | struct snd_virmidi_dev *rdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | |
| 318 | rdev = private_data; |
| 319 | if (!try_module_get(rdev->card->module)) |
| 320 | return -EFAULT; |
| 321 | rdev->flags |= SNDRV_VIRMIDI_USE; |
| 322 | return 0; |
| 323 | } |
| 324 | |
| 325 | /* |
| 326 | * unuse callback - disallow input to rawmidi device |
| 327 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 328 | static int snd_virmidi_unuse(void *private_data, |
| 329 | struct snd_seq_port_subscribe *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 331 | struct snd_virmidi_dev *rdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
| 333 | rdev = private_data; |
| 334 | rdev->flags &= ~SNDRV_VIRMIDI_USE; |
| 335 | module_put(rdev->card->module); |
| 336 | return 0; |
| 337 | } |
| 338 | |
| 339 | |
| 340 | /* |
| 341 | * Register functions |
| 342 | */ |
| 343 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 344 | static struct snd_rawmidi_ops snd_virmidi_input_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | .open = snd_virmidi_input_open, |
| 346 | .close = snd_virmidi_input_close, |
| 347 | .trigger = snd_virmidi_input_trigger, |
| 348 | }; |
| 349 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 350 | static struct snd_rawmidi_ops snd_virmidi_output_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | .open = snd_virmidi_output_open, |
| 352 | .close = snd_virmidi_output_close, |
| 353 | .trigger = snd_virmidi_output_trigger, |
| 354 | }; |
| 355 | |
| 356 | /* |
| 357 | * create a sequencer client and a port |
| 358 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 359 | static int snd_virmidi_dev_attach_seq(struct snd_virmidi_dev *rdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | { |
| 361 | int client; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 362 | struct snd_seq_port_callback pcallbacks; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 363 | struct snd_seq_port_info *pinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | int err; |
| 365 | |
| 366 | if (rdev->client >= 0) |
| 367 | return 0; |
| 368 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | pinfo = kmalloc(sizeof(*pinfo), GFP_KERNEL); |
Clemens Ladisch | 7b6d924 | 2005-12-12 09:33:37 +0100 | [diff] [blame] | 370 | if (!pinfo) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | err = -ENOMEM; |
| 372 | goto __error; |
| 373 | } |
| 374 | |
Clemens Ladisch | 7b6d924 | 2005-12-12 09:33:37 +0100 | [diff] [blame] | 375 | client = snd_seq_create_kernel_client(rdev->card, rdev->device, |
| 376 | "%s %d-%d", rdev->rmidi->name, |
| 377 | rdev->card->number, |
| 378 | rdev->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | if (client < 0) { |
| 380 | err = client; |
| 381 | goto __error; |
| 382 | } |
| 383 | rdev->client = client; |
| 384 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | /* create a port */ |
| 386 | memset(pinfo, 0, sizeof(*pinfo)); |
| 387 | pinfo->addr.client = client; |
| 388 | sprintf(pinfo->name, "VirMIDI %d-%d", rdev->card->number, rdev->device); |
| 389 | /* set all capabilities */ |
| 390 | pinfo->capability |= SNDRV_SEQ_PORT_CAP_WRITE | SNDRV_SEQ_PORT_CAP_SYNC_WRITE | SNDRV_SEQ_PORT_CAP_SUBS_WRITE; |
| 391 | pinfo->capability |= SNDRV_SEQ_PORT_CAP_READ | SNDRV_SEQ_PORT_CAP_SYNC_READ | SNDRV_SEQ_PORT_CAP_SUBS_READ; |
| 392 | pinfo->capability |= SNDRV_SEQ_PORT_CAP_DUPLEX; |
| 393 | pinfo->type = SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC; |
| 394 | pinfo->midi_channels = 16; |
| 395 | memset(&pcallbacks, 0, sizeof(pcallbacks)); |
| 396 | pcallbacks.owner = THIS_MODULE; |
| 397 | pcallbacks.private_data = rdev; |
| 398 | pcallbacks.subscribe = snd_virmidi_subscribe; |
| 399 | pcallbacks.unsubscribe = snd_virmidi_unsubscribe; |
| 400 | pcallbacks.use = snd_virmidi_use; |
| 401 | pcallbacks.unuse = snd_virmidi_unuse; |
| 402 | pcallbacks.event_input = snd_virmidi_event_input; |
| 403 | pinfo->kernel = &pcallbacks; |
Clemens Ladisch | 0aa0d38 | 2005-04-06 09:43:59 +0200 | [diff] [blame] | 404 | err = snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_CREATE_PORT, pinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | if (err < 0) { |
| 406 | snd_seq_delete_kernel_client(client); |
| 407 | rdev->client = -1; |
| 408 | goto __error; |
| 409 | } |
| 410 | |
| 411 | rdev->port = pinfo->addr.port; |
| 412 | err = 0; /* success */ |
| 413 | |
| 414 | __error: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | kfree(pinfo); |
| 416 | return err; |
| 417 | } |
| 418 | |
| 419 | |
| 420 | /* |
| 421 | * release the sequencer client |
| 422 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 423 | static void snd_virmidi_dev_detach_seq(struct snd_virmidi_dev *rdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | { |
| 425 | if (rdev->client >= 0) { |
| 426 | snd_seq_delete_kernel_client(rdev->client); |
| 427 | rdev->client = -1; |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | /* |
| 432 | * register the device |
| 433 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 434 | static int snd_virmidi_dev_register(struct snd_rawmidi *rmidi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 436 | struct snd_virmidi_dev *rdev = rmidi->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | int err; |
| 438 | |
| 439 | switch (rdev->seq_mode) { |
| 440 | case SNDRV_VIRMIDI_SEQ_DISPATCH: |
| 441 | err = snd_virmidi_dev_attach_seq(rdev); |
| 442 | if (err < 0) |
| 443 | return err; |
| 444 | break; |
| 445 | case SNDRV_VIRMIDI_SEQ_ATTACH: |
| 446 | if (rdev->client == 0) |
| 447 | return -EINVAL; |
| 448 | /* should check presence of port more strictly.. */ |
| 449 | break; |
| 450 | default: |
| 451 | snd_printk(KERN_ERR "seq_mode is not set: %d\n", rdev->seq_mode); |
| 452 | return -EINVAL; |
| 453 | } |
| 454 | return 0; |
| 455 | } |
| 456 | |
| 457 | |
| 458 | /* |
| 459 | * unregister the device |
| 460 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 461 | static int snd_virmidi_dev_unregister(struct snd_rawmidi *rmidi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 463 | struct snd_virmidi_dev *rdev = rmidi->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | |
| 465 | if (rdev->seq_mode == SNDRV_VIRMIDI_SEQ_DISPATCH) |
| 466 | snd_virmidi_dev_detach_seq(rdev); |
| 467 | return 0; |
| 468 | } |
| 469 | |
| 470 | /* |
| 471 | * |
| 472 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 473 | static struct snd_rawmidi_global_ops snd_virmidi_global_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | .dev_register = snd_virmidi_dev_register, |
| 475 | .dev_unregister = snd_virmidi_dev_unregister, |
| 476 | }; |
| 477 | |
| 478 | /* |
| 479 | * free device |
| 480 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 481 | static void snd_virmidi_free(struct snd_rawmidi *rmidi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 483 | struct snd_virmidi_dev *rdev = rmidi->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | kfree(rdev); |
| 485 | } |
| 486 | |
| 487 | /* |
| 488 | * create a new device |
| 489 | * |
| 490 | */ |
| 491 | /* exported */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 492 | int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 494 | struct snd_rawmidi *rmidi; |
| 495 | struct snd_virmidi_dev *rdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | int err; |
| 497 | |
| 498 | *rrmidi = NULL; |
| 499 | if ((err = snd_rawmidi_new(card, "VirMidi", device, |
| 500 | 16, /* may be configurable */ |
| 501 | 16, /* may be configurable */ |
| 502 | &rmidi)) < 0) |
| 503 | return err; |
| 504 | strcpy(rmidi->name, rmidi->id); |
Takashi Iwai | ecca82b | 2005-09-09 14:20:49 +0200 | [diff] [blame] | 505 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | if (rdev == NULL) { |
| 507 | snd_device_free(card, rmidi); |
| 508 | return -ENOMEM; |
| 509 | } |
| 510 | rdev->card = card; |
| 511 | rdev->rmidi = rmidi; |
| 512 | rdev->device = device; |
| 513 | rdev->client = -1; |
| 514 | rwlock_init(&rdev->filelist_lock); |
| 515 | INIT_LIST_HEAD(&rdev->filelist); |
| 516 | rdev->seq_mode = SNDRV_VIRMIDI_SEQ_DISPATCH; |
| 517 | rmidi->private_data = rdev; |
| 518 | rmidi->private_free = snd_virmidi_free; |
| 519 | rmidi->ops = &snd_virmidi_global_ops; |
| 520 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_virmidi_input_ops); |
| 521 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_virmidi_output_ops); |
| 522 | rmidi->info_flags = SNDRV_RAWMIDI_INFO_INPUT | |
| 523 | SNDRV_RAWMIDI_INFO_OUTPUT | |
| 524 | SNDRV_RAWMIDI_INFO_DUPLEX; |
| 525 | *rrmidi = rmidi; |
| 526 | return 0; |
| 527 | } |
| 528 | |
| 529 | /* |
| 530 | * ENTRY functions |
| 531 | */ |
| 532 | |
| 533 | static int __init alsa_virmidi_init(void) |
| 534 | { |
| 535 | return 0; |
| 536 | } |
| 537 | |
| 538 | static void __exit alsa_virmidi_exit(void) |
| 539 | { |
| 540 | } |
| 541 | |
| 542 | module_init(alsa_virmidi_init) |
| 543 | module_exit(alsa_virmidi_exit) |
| 544 | |
| 545 | EXPORT_SYMBOL(snd_virmidi_new); |