Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 1 | /* |
| 2 | * This program is free software; you can redistribute it and/or modify |
| 3 | * it under the terms of the GNU General Public License as published by |
| 4 | * the Free Software Foundation; either version 2 of the License, or |
| 5 | * (at your option) any later version. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | * |
| 12 | * You should have received a copy of the GNU General Public License |
| 13 | * along with this program; if not, write to the Free Software |
| 14 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 15 | */ |
| 16 | |
| 17 | |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/usb.h> |
| 21 | #include <linux/usb/audio.h> |
| 22 | #include <linux/usb/audio-v2.h> |
| 23 | |
| 24 | #include <sound/core.h> |
| 25 | #include <sound/pcm.h> |
Takashi Iwai | 04324cc | 2012-11-26 16:24:02 +0100 | [diff] [blame] | 26 | #include <sound/control.h> |
| 27 | #include <sound/tlv.h> |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 28 | |
| 29 | #include "usbaudio.h" |
| 30 | #include "card.h" |
| 31 | #include "proc.h" |
| 32 | #include "quirks.h" |
| 33 | #include "endpoint.h" |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 34 | #include "pcm.h" |
| 35 | #include "helper.h" |
| 36 | #include "format.h" |
| 37 | #include "clock.h" |
| 38 | #include "stream.h" |
| 39 | |
| 40 | /* |
| 41 | * free a substream |
| 42 | */ |
| 43 | static void free_substream(struct snd_usb_substream *subs) |
| 44 | { |
Eldad Zack | 88766f0 | 2013-04-03 23:18:49 +0200 | [diff] [blame] | 45 | struct audioformat *fp, *n; |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 46 | |
| 47 | if (!subs->num_formats) |
| 48 | return; /* not initialized */ |
Eldad Zack | 88766f0 | 2013-04-03 23:18:49 +0200 | [diff] [blame] | 49 | list_for_each_entry_safe(fp, n, &subs->fmt_list, list) { |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 50 | kfree(fp->rate_table); |
Takashi Iwai | 04324cc | 2012-11-26 16:24:02 +0100 | [diff] [blame] | 51 | kfree(fp->chmap); |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 52 | kfree(fp); |
| 53 | } |
| 54 | kfree(subs->rate_list.list); |
| 55 | } |
| 56 | |
| 57 | |
| 58 | /* |
| 59 | * free a usb stream instance |
| 60 | */ |
| 61 | static void snd_usb_audio_stream_free(struct snd_usb_stream *stream) |
| 62 | { |
| 63 | free_substream(&stream->substream[0]); |
| 64 | free_substream(&stream->substream[1]); |
| 65 | list_del(&stream->list); |
| 66 | kfree(stream); |
| 67 | } |
| 68 | |
| 69 | static void snd_usb_audio_pcm_free(struct snd_pcm *pcm) |
| 70 | { |
| 71 | struct snd_usb_stream *stream = pcm->private_data; |
| 72 | if (stream) { |
| 73 | stream->pcm = NULL; |
| 74 | snd_usb_audio_stream_free(stream); |
| 75 | } |
| 76 | } |
| 77 | |
Daniel Mack | edcd363 | 2012-04-12 13:51:12 +0200 | [diff] [blame] | 78 | /* |
| 79 | * initialize the substream instance. |
| 80 | */ |
| 81 | |
| 82 | static void snd_usb_init_substream(struct snd_usb_stream *as, |
| 83 | int stream, |
| 84 | struct audioformat *fp) |
| 85 | { |
| 86 | struct snd_usb_substream *subs = &as->substream[stream]; |
| 87 | |
| 88 | INIT_LIST_HEAD(&subs->fmt_list); |
| 89 | spin_lock_init(&subs->lock); |
| 90 | |
| 91 | subs->stream = as; |
| 92 | subs->direction = stream; |
| 93 | subs->dev = as->chip->dev; |
| 94 | subs->txfr_quirk = as->chip->txfr_quirk; |
Takashi Iwai | 978520b | 2012-10-12 15:12:55 +0200 | [diff] [blame] | 95 | subs->speed = snd_usb_get_speed(subs->dev); |
Calvin Owens | 1539d4f | 2013-04-12 22:33:59 -0500 | [diff] [blame] | 96 | subs->pkt_offset_adj = 0; |
Daniel Mack | edcd363 | 2012-04-12 13:51:12 +0200 | [diff] [blame] | 97 | |
| 98 | snd_usb_set_pcm_ops(as->pcm, stream); |
| 99 | |
| 100 | list_add_tail(&fp->list, &subs->fmt_list); |
| 101 | subs->formats |= fp->formats; |
| 102 | subs->num_formats++; |
| 103 | subs->fmt_type = fp->fmt_type; |
Takashi Iwai | 8260ef0 | 2012-06-08 09:01:37 +0200 | [diff] [blame] | 104 | subs->ep_num = fp->endpoint; |
Takashi Iwai | 04324cc | 2012-11-26 16:24:02 +0100 | [diff] [blame] | 105 | if (fp->channels > subs->channels_max) |
| 106 | subs->channels_max = fp->channels; |
| 107 | } |
| 108 | |
| 109 | /* kctl callbacks for usb-audio channel maps */ |
| 110 | static int usb_chmap_ctl_info(struct snd_kcontrol *kcontrol, |
| 111 | struct snd_ctl_elem_info *uinfo) |
| 112 | { |
| 113 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
| 114 | struct snd_usb_substream *subs = info->private_data; |
| 115 | |
| 116 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
| 117 | uinfo->count = subs->channels_max; |
| 118 | uinfo->value.integer.min = 0; |
| 119 | uinfo->value.integer.max = SNDRV_CHMAP_LAST; |
| 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | /* check whether a duplicated entry exists in the audiofmt list */ |
| 124 | static bool have_dup_chmap(struct snd_usb_substream *subs, |
| 125 | struct audioformat *fp) |
| 126 | { |
| 127 | struct list_head *p; |
| 128 | |
| 129 | for (p = fp->list.prev; p != &subs->fmt_list; p = p->prev) { |
| 130 | struct audioformat *prev; |
| 131 | prev = list_entry(p, struct audioformat, list); |
| 132 | if (prev->chmap && |
| 133 | !memcmp(prev->chmap, fp->chmap, sizeof(*fp->chmap))) |
| 134 | return true; |
| 135 | } |
| 136 | return false; |
| 137 | } |
| 138 | |
| 139 | static int usb_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, |
| 140 | unsigned int size, unsigned int __user *tlv) |
| 141 | { |
| 142 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
| 143 | struct snd_usb_substream *subs = info->private_data; |
| 144 | struct audioformat *fp; |
| 145 | unsigned int __user *dst; |
| 146 | int count = 0; |
| 147 | |
| 148 | if (size < 8) |
| 149 | return -ENOMEM; |
| 150 | if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) |
| 151 | return -EFAULT; |
| 152 | size -= 8; |
| 153 | dst = tlv + 2; |
| 154 | list_for_each_entry(fp, &subs->fmt_list, list) { |
| 155 | int i, ch_bytes; |
| 156 | |
| 157 | if (!fp->chmap) |
| 158 | continue; |
| 159 | if (have_dup_chmap(subs, fp)) |
| 160 | continue; |
| 161 | /* copy the entry */ |
| 162 | ch_bytes = fp->chmap->channels * 4; |
| 163 | if (size < 8 + ch_bytes) |
| 164 | return -ENOMEM; |
| 165 | if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || |
| 166 | put_user(ch_bytes, dst + 1)) |
| 167 | return -EFAULT; |
| 168 | dst += 2; |
| 169 | for (i = 0; i < fp->chmap->channels; i++, dst++) { |
| 170 | if (put_user(fp->chmap->map[i], dst)) |
| 171 | return -EFAULT; |
| 172 | } |
| 173 | |
| 174 | count += 8 + ch_bytes; |
| 175 | size -= 8 + ch_bytes; |
| 176 | } |
| 177 | if (put_user(count, tlv + 1)) |
| 178 | return -EFAULT; |
| 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | static int usb_chmap_ctl_get(struct snd_kcontrol *kcontrol, |
| 183 | struct snd_ctl_elem_value *ucontrol) |
| 184 | { |
| 185 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
| 186 | struct snd_usb_substream *subs = info->private_data; |
| 187 | struct snd_pcm_chmap_elem *chmap = NULL; |
| 188 | int i; |
| 189 | |
| 190 | memset(ucontrol->value.integer.value, 0, |
| 191 | sizeof(ucontrol->value.integer.value)); |
| 192 | if (subs->cur_audiofmt) |
| 193 | chmap = subs->cur_audiofmt->chmap; |
| 194 | if (chmap) { |
| 195 | for (i = 0; i < chmap->channels; i++) |
| 196 | ucontrol->value.integer.value[i] = chmap->map[i]; |
| 197 | } |
| 198 | return 0; |
| 199 | } |
| 200 | |
| 201 | /* create a chmap kctl assigned to the given USB substream */ |
| 202 | static int add_chmap(struct snd_pcm *pcm, int stream, |
| 203 | struct snd_usb_substream *subs) |
| 204 | { |
| 205 | struct audioformat *fp; |
| 206 | struct snd_pcm_chmap *chmap; |
| 207 | struct snd_kcontrol *kctl; |
| 208 | int err; |
| 209 | |
| 210 | list_for_each_entry(fp, &subs->fmt_list, list) |
| 211 | if (fp->chmap) |
| 212 | goto ok; |
| 213 | /* no chmap is found */ |
| 214 | return 0; |
| 215 | |
| 216 | ok: |
| 217 | err = snd_pcm_add_chmap_ctls(pcm, stream, NULL, 0, 0, &chmap); |
| 218 | if (err < 0) |
| 219 | return err; |
| 220 | |
| 221 | /* override handlers */ |
| 222 | chmap->private_data = subs; |
| 223 | kctl = chmap->kctl; |
| 224 | kctl->info = usb_chmap_ctl_info; |
| 225 | kctl->get = usb_chmap_ctl_get; |
| 226 | kctl->tlv.c = usb_chmap_ctl_tlv; |
| 227 | |
| 228 | return 0; |
| 229 | } |
| 230 | |
| 231 | /* convert from USB ChannelConfig bits to ALSA chmap element */ |
| 232 | static struct snd_pcm_chmap_elem *convert_chmap(int channels, unsigned int bits, |
| 233 | int protocol) |
| 234 | { |
| 235 | static unsigned int uac1_maps[] = { |
| 236 | SNDRV_CHMAP_FL, /* left front */ |
| 237 | SNDRV_CHMAP_FR, /* right front */ |
| 238 | SNDRV_CHMAP_FC, /* center front */ |
| 239 | SNDRV_CHMAP_LFE, /* LFE */ |
| 240 | SNDRV_CHMAP_SL, /* left surround */ |
| 241 | SNDRV_CHMAP_SR, /* right surround */ |
| 242 | SNDRV_CHMAP_FLC, /* left of center */ |
| 243 | SNDRV_CHMAP_FRC, /* right of center */ |
| 244 | SNDRV_CHMAP_RC, /* surround */ |
| 245 | SNDRV_CHMAP_SL, /* side left */ |
| 246 | SNDRV_CHMAP_SR, /* side right */ |
| 247 | SNDRV_CHMAP_TC, /* top */ |
| 248 | 0 /* terminator */ |
| 249 | }; |
| 250 | static unsigned int uac2_maps[] = { |
| 251 | SNDRV_CHMAP_FL, /* front left */ |
| 252 | SNDRV_CHMAP_FR, /* front right */ |
| 253 | SNDRV_CHMAP_FC, /* front center */ |
| 254 | SNDRV_CHMAP_LFE, /* LFE */ |
| 255 | SNDRV_CHMAP_RL, /* back left */ |
| 256 | SNDRV_CHMAP_RR, /* back right */ |
| 257 | SNDRV_CHMAP_FLC, /* front left of center */ |
| 258 | SNDRV_CHMAP_FRC, /* front right of center */ |
| 259 | SNDRV_CHMAP_RC, /* back center */ |
| 260 | SNDRV_CHMAP_SL, /* side left */ |
| 261 | SNDRV_CHMAP_SR, /* side right */ |
| 262 | SNDRV_CHMAP_TC, /* top center */ |
| 263 | SNDRV_CHMAP_TFL, /* top front left */ |
| 264 | SNDRV_CHMAP_TFC, /* top front center */ |
| 265 | SNDRV_CHMAP_TFR, /* top front right */ |
| 266 | SNDRV_CHMAP_TRL, /* top back left */ |
| 267 | SNDRV_CHMAP_TRC, /* top back center */ |
| 268 | SNDRV_CHMAP_TRR, /* top back right */ |
| 269 | SNDRV_CHMAP_TFLC, /* top front left of center */ |
| 270 | SNDRV_CHMAP_TFRC, /* top front right of center */ |
| 271 | SNDRV_CHMAP_LLFE, /* left LFE */ |
| 272 | SNDRV_CHMAP_RLFE, /* right LFE */ |
| 273 | SNDRV_CHMAP_TSL, /* top side left */ |
| 274 | SNDRV_CHMAP_TSR, /* top side right */ |
| 275 | SNDRV_CHMAP_BC, /* bottom center */ |
| 276 | SNDRV_CHMAP_BLC, /* bottom left center */ |
| 277 | SNDRV_CHMAP_BRC, /* bottom right center */ |
| 278 | 0 /* terminator */ |
| 279 | }; |
| 280 | struct snd_pcm_chmap_elem *chmap; |
| 281 | const unsigned int *maps; |
| 282 | int c; |
| 283 | |
Takashi Iwai | 04324cc | 2012-11-26 16:24:02 +0100 | [diff] [blame] | 284 | if (channels > ARRAY_SIZE(chmap->map)) |
| 285 | return NULL; |
| 286 | |
| 287 | chmap = kzalloc(sizeof(*chmap), GFP_KERNEL); |
| 288 | if (!chmap) |
| 289 | return NULL; |
| 290 | |
| 291 | maps = protocol == UAC_VERSION_2 ? uac2_maps : uac1_maps; |
| 292 | chmap->channels = channels; |
| 293 | c = 0; |
David Henningsson | 0dca01c | 2013-11-05 04:41:06 +0100 | [diff] [blame^] | 294 | |
| 295 | if (bits) { |
| 296 | for (; bits && *maps; maps++, bits >>= 1) |
| 297 | if (bits & 1) |
| 298 | chmap->map[c++] = *maps; |
| 299 | } else { |
| 300 | /* If we're missing wChannelConfig, then guess something |
| 301 | to make sure the channel map is not skipped entirely */ |
| 302 | if (channels == 1) |
| 303 | chmap->map[c++] = SNDRV_CHMAP_MONO; |
| 304 | else |
| 305 | for (; c < channels && *maps; maps++) |
| 306 | chmap->map[c++] = *maps; |
Takashi Iwai | 04324cc | 2012-11-26 16:24:02 +0100 | [diff] [blame] | 307 | } |
| 308 | |
| 309 | for (; c < channels; c++) |
| 310 | chmap->map[c] = SNDRV_CHMAP_UNKNOWN; |
| 311 | |
| 312 | return chmap; |
Daniel Mack | edcd363 | 2012-04-12 13:51:12 +0200 | [diff] [blame] | 313 | } |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 314 | |
| 315 | /* |
| 316 | * add this endpoint to the chip instance. |
| 317 | * if a stream with the same endpoint already exists, append to it. |
| 318 | * if not, create a new pcm stream. |
| 319 | */ |
| 320 | int snd_usb_add_audio_stream(struct snd_usb_audio *chip, |
| 321 | int stream, |
| 322 | struct audioformat *fp) |
| 323 | { |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 324 | struct snd_usb_stream *as; |
| 325 | struct snd_usb_substream *subs; |
| 326 | struct snd_pcm *pcm; |
| 327 | int err; |
| 328 | |
Eldad Zack | 88766f0 | 2013-04-03 23:18:49 +0200 | [diff] [blame] | 329 | list_for_each_entry(as, &chip->pcm_list, list) { |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 330 | if (as->fmt_type != fp->fmt_type) |
| 331 | continue; |
| 332 | subs = &as->substream[stream]; |
Takashi Iwai | 8260ef0 | 2012-06-08 09:01:37 +0200 | [diff] [blame] | 333 | if (subs->ep_num == fp->endpoint) { |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 334 | list_add_tail(&fp->list, &subs->fmt_list); |
| 335 | subs->num_formats++; |
| 336 | subs->formats |= fp->formats; |
| 337 | return 0; |
| 338 | } |
| 339 | } |
| 340 | /* look for an empty stream */ |
Eldad Zack | 88766f0 | 2013-04-03 23:18:49 +0200 | [diff] [blame] | 341 | list_for_each_entry(as, &chip->pcm_list, list) { |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 342 | if (as->fmt_type != fp->fmt_type) |
| 343 | continue; |
| 344 | subs = &as->substream[stream]; |
Takashi Iwai | 8260ef0 | 2012-06-08 09:01:37 +0200 | [diff] [blame] | 345 | if (subs->ep_num) |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 346 | continue; |
| 347 | err = snd_pcm_new_stream(as->pcm, stream, 1); |
| 348 | if (err < 0) |
| 349 | return err; |
| 350 | snd_usb_init_substream(as, stream, fp); |
Takashi Iwai | 04324cc | 2012-11-26 16:24:02 +0100 | [diff] [blame] | 351 | return add_chmap(as->pcm, stream, subs); |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 352 | } |
| 353 | |
| 354 | /* create a new pcm */ |
| 355 | as = kzalloc(sizeof(*as), GFP_KERNEL); |
| 356 | if (!as) |
| 357 | return -ENOMEM; |
| 358 | as->pcm_index = chip->pcm_devs; |
| 359 | as->chip = chip; |
| 360 | as->fmt_type = fp->fmt_type; |
| 361 | err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs, |
| 362 | stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0, |
| 363 | stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1, |
| 364 | &pcm); |
| 365 | if (err < 0) { |
| 366 | kfree(as); |
| 367 | return err; |
| 368 | } |
| 369 | as->pcm = pcm; |
| 370 | pcm->private_data = as; |
| 371 | pcm->private_free = snd_usb_audio_pcm_free; |
| 372 | pcm->info_flags = 0; |
| 373 | if (chip->pcm_devs > 0) |
| 374 | sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs); |
| 375 | else |
| 376 | strcpy(pcm->name, "USB Audio"); |
| 377 | |
| 378 | snd_usb_init_substream(as, stream, fp); |
| 379 | |
| 380 | list_add(&as->list, &chip->pcm_list); |
| 381 | chip->pcm_devs++; |
| 382 | |
| 383 | snd_usb_proc_pcm_format_add(as); |
| 384 | |
Takashi Iwai | 04324cc | 2012-11-26 16:24:02 +0100 | [diff] [blame] | 385 | return add_chmap(pcm, stream, &as->substream[stream]); |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 386 | } |
| 387 | |
| 388 | static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip, |
| 389 | struct usb_host_interface *alts, |
| 390 | int protocol, int iface_no) |
| 391 | { |
| 392 | /* parsed with a v1 header here. that's ok as we only look at the |
| 393 | * header first which is the same for both versions */ |
| 394 | struct uac_iso_endpoint_descriptor *csep; |
| 395 | struct usb_interface_descriptor *altsd = get_iface_desc(alts); |
| 396 | int attributes = 0; |
| 397 | |
| 398 | csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT); |
| 399 | |
| 400 | /* Creamware Noah has this descriptor after the 2nd endpoint */ |
| 401 | if (!csep && altsd->bNumEndpoints >= 2) |
| 402 | csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT); |
| 403 | |
Daniel Mack | ebfc594 | 2013-04-24 19:38:42 +0200 | [diff] [blame] | 404 | /* |
| 405 | * If we can't locate the USB_DT_CS_ENDPOINT descriptor in the extra |
| 406 | * bytes after the first endpoint, go search the entire interface. |
| 407 | * Some devices have it directly *before* the standard endpoint. |
| 408 | */ |
| 409 | if (!csep) |
| 410 | csep = snd_usb_find_desc(alts->extra, alts->extralen, NULL, USB_DT_CS_ENDPOINT); |
| 411 | |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 412 | if (!csep || csep->bLength < 7 || |
| 413 | csep->bDescriptorSubtype != UAC_EP_GENERAL) { |
| 414 | snd_printk(KERN_WARNING "%d:%u:%d : no or invalid" |
| 415 | " class specific endpoint descriptor\n", |
| 416 | chip->dev->devnum, iface_no, |
| 417 | altsd->bAlternateSetting); |
| 418 | return 0; |
| 419 | } |
| 420 | |
| 421 | if (protocol == UAC_VERSION_1) { |
| 422 | attributes = csep->bmAttributes; |
| 423 | } else { |
| 424 | struct uac2_iso_endpoint_descriptor *csep2 = |
| 425 | (struct uac2_iso_endpoint_descriptor *) csep; |
| 426 | |
| 427 | attributes = csep->bmAttributes & UAC_EP_CS_ATTR_FILL_MAX; |
| 428 | |
| 429 | /* emulate the endpoint attributes of a v1 device */ |
| 430 | if (csep2->bmControls & UAC2_CONTROL_PITCH) |
| 431 | attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL; |
| 432 | } |
| 433 | |
| 434 | return attributes; |
| 435 | } |
| 436 | |
Takashi Iwai | 04324cc | 2012-11-26 16:24:02 +0100 | [diff] [blame] | 437 | /* find an input terminal descriptor (either UAC1 or UAC2) with the given |
| 438 | * terminal id |
| 439 | */ |
| 440 | static void * |
| 441 | snd_usb_find_input_terminal_descriptor(struct usb_host_interface *ctrl_iface, |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 442 | int terminal_id) |
| 443 | { |
| 444 | struct uac2_input_terminal_descriptor *term = NULL; |
| 445 | |
| 446 | while ((term = snd_usb_find_csint_desc(ctrl_iface->extra, |
| 447 | ctrl_iface->extralen, |
| 448 | term, UAC_INPUT_TERMINAL))) { |
| 449 | if (term->bTerminalID == terminal_id) |
| 450 | return term; |
| 451 | } |
| 452 | |
| 453 | return NULL; |
| 454 | } |
| 455 | |
| 456 | static struct uac2_output_terminal_descriptor * |
| 457 | snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface, |
| 458 | int terminal_id) |
| 459 | { |
| 460 | struct uac2_output_terminal_descriptor *term = NULL; |
| 461 | |
| 462 | while ((term = snd_usb_find_csint_desc(ctrl_iface->extra, |
| 463 | ctrl_iface->extralen, |
| 464 | term, UAC_OUTPUT_TERMINAL))) { |
| 465 | if (term->bTerminalID == terminal_id) |
| 466 | return term; |
| 467 | } |
| 468 | |
| 469 | return NULL; |
| 470 | } |
| 471 | |
| 472 | int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no) |
| 473 | { |
| 474 | struct usb_device *dev; |
| 475 | struct usb_interface *iface; |
| 476 | struct usb_host_interface *alts; |
| 477 | struct usb_interface_descriptor *altsd; |
| 478 | int i, altno, err, stream; |
Daniel Mack | 2fcdb06 | 2013-03-17 20:07:24 +0800 | [diff] [blame] | 479 | unsigned int format = 0, num_channels = 0; |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 480 | struct audioformat *fp = NULL; |
| 481 | int num, protocol, clock = 0; |
| 482 | struct uac_format_type_i_continuous_descriptor *fmt; |
Takashi Iwai | 04324cc | 2012-11-26 16:24:02 +0100 | [diff] [blame] | 483 | unsigned int chconfig; |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 484 | |
| 485 | dev = chip->dev; |
| 486 | |
| 487 | /* parse the interface's altsettings */ |
| 488 | iface = usb_ifnum_to_if(dev, iface_no); |
| 489 | |
| 490 | num = iface->num_altsetting; |
| 491 | |
| 492 | /* |
| 493 | * Dallas DS4201 workaround: It presents 5 altsettings, but the last |
| 494 | * one misses syncpipe, and does not produce any sound. |
| 495 | */ |
| 496 | if (chip->usb_id == USB_ID(0x04fa, 0x4201)) |
| 497 | num = 4; |
| 498 | |
| 499 | for (i = 0; i < num; i++) { |
| 500 | alts = &iface->altsetting[i]; |
| 501 | altsd = get_iface_desc(alts); |
| 502 | protocol = altsd->bInterfaceProtocol; |
| 503 | /* skip invalid one */ |
Clemens Ladisch | aafe77c | 2013-03-31 23:43:12 +0200 | [diff] [blame] | 504 | if (((altsd->bInterfaceClass != USB_CLASS_AUDIO || |
| 505 | (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING && |
| 506 | altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC)) && |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 507 | altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 508 | altsd->bNumEndpoints < 1 || |
| 509 | le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0) |
| 510 | continue; |
| 511 | /* must be isochronous */ |
| 512 | if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != |
| 513 | USB_ENDPOINT_XFER_ISOC) |
| 514 | continue; |
| 515 | /* check direction */ |
| 516 | stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ? |
| 517 | SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; |
| 518 | altno = altsd->bAlternateSetting; |
| 519 | |
| 520 | if (snd_usb_apply_interface_quirk(chip, iface_no, altno)) |
| 521 | continue; |
| 522 | |
Clemens Ladisch | aafe77c | 2013-03-31 23:43:12 +0200 | [diff] [blame] | 523 | /* |
| 524 | * Roland audio streaming interfaces are marked with protocols |
| 525 | * 0/1/2, but are UAC 1 compatible. |
| 526 | */ |
| 527 | if (USB_ID_VENDOR(chip->usb_id) == 0x0582 && |
| 528 | altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC && |
| 529 | protocol <= 2) |
| 530 | protocol = UAC_VERSION_1; |
| 531 | |
Takashi Iwai | 04324cc | 2012-11-26 16:24:02 +0100 | [diff] [blame] | 532 | chconfig = 0; |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 533 | /* get audio formats */ |
| 534 | switch (protocol) { |
| 535 | default: |
| 536 | snd_printdd(KERN_WARNING "%d:%u:%d: unknown interface protocol %#02x, assuming v1\n", |
| 537 | dev->devnum, iface_no, altno, protocol); |
| 538 | protocol = UAC_VERSION_1; |
| 539 | /* fall through */ |
| 540 | |
| 541 | case UAC_VERSION_1: { |
| 542 | struct uac1_as_header_descriptor *as = |
| 543 | snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL); |
Takashi Iwai | 04324cc | 2012-11-26 16:24:02 +0100 | [diff] [blame] | 544 | struct uac_input_terminal_descriptor *iterm; |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 545 | |
| 546 | if (!as) { |
| 547 | snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n", |
| 548 | dev->devnum, iface_no, altno); |
| 549 | continue; |
| 550 | } |
| 551 | |
| 552 | if (as->bLength < sizeof(*as)) { |
| 553 | snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n", |
| 554 | dev->devnum, iface_no, altno); |
| 555 | continue; |
| 556 | } |
| 557 | |
| 558 | format = le16_to_cpu(as->wFormatTag); /* remember the format value */ |
Takashi Iwai | 04324cc | 2012-11-26 16:24:02 +0100 | [diff] [blame] | 559 | |
| 560 | iterm = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf, |
| 561 | as->bTerminalLink); |
| 562 | if (iterm) { |
| 563 | num_channels = iterm->bNrChannels; |
| 564 | chconfig = le16_to_cpu(iterm->wChannelConfig); |
| 565 | } |
| 566 | |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 567 | break; |
| 568 | } |
| 569 | |
| 570 | case UAC_VERSION_2: { |
| 571 | struct uac2_input_terminal_descriptor *input_term; |
| 572 | struct uac2_output_terminal_descriptor *output_term; |
| 573 | struct uac2_as_header_descriptor *as = |
| 574 | snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL); |
| 575 | |
| 576 | if (!as) { |
| 577 | snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n", |
| 578 | dev->devnum, iface_no, altno); |
| 579 | continue; |
| 580 | } |
| 581 | |
| 582 | if (as->bLength < sizeof(*as)) { |
| 583 | snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n", |
| 584 | dev->devnum, iface_no, altno); |
| 585 | continue; |
| 586 | } |
| 587 | |
| 588 | num_channels = as->bNrChannels; |
| 589 | format = le32_to_cpu(as->bmFormats); |
| 590 | |
| 591 | /* lookup the terminal associated to this interface |
| 592 | * to extract the clock */ |
| 593 | input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf, |
| 594 | as->bTerminalLink); |
| 595 | if (input_term) { |
| 596 | clock = input_term->bCSourceID; |
Takashi Iwai | 04324cc | 2012-11-26 16:24:02 +0100 | [diff] [blame] | 597 | chconfig = le32_to_cpu(input_term->bmChannelConfig); |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 598 | break; |
| 599 | } |
| 600 | |
| 601 | output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf, |
| 602 | as->bTerminalLink); |
| 603 | if (output_term) { |
| 604 | clock = output_term->bCSourceID; |
| 605 | break; |
| 606 | } |
| 607 | |
| 608 | snd_printk(KERN_ERR "%d:%u:%d : bogus bTerminalLink %d\n", |
| 609 | dev->devnum, iface_no, altno, as->bTerminalLink); |
| 610 | continue; |
| 611 | } |
| 612 | } |
| 613 | |
| 614 | /* get format type */ |
| 615 | fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_FORMAT_TYPE); |
| 616 | if (!fmt) { |
| 617 | snd_printk(KERN_ERR "%d:%u:%d : no UAC_FORMAT_TYPE desc\n", |
| 618 | dev->devnum, iface_no, altno); |
| 619 | continue; |
| 620 | } |
| 621 | if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8)) || |
| 622 | ((protocol == UAC_VERSION_2) && (fmt->bLength < 6))) { |
| 623 | snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n", |
| 624 | dev->devnum, iface_no, altno); |
| 625 | continue; |
| 626 | } |
| 627 | |
| 628 | /* |
| 629 | * Blue Microphones workaround: The last altsetting is identical |
| 630 | * with the previous one, except for a larger packet size, but |
| 631 | * is actually a mislabeled two-channel setting; ignore it. |
| 632 | */ |
| 633 | if (fmt->bNrChannels == 1 && |
| 634 | fmt->bSubframeSize == 2 && |
| 635 | altno == 2 && num == 3 && |
| 636 | fp && fp->altsetting == 1 && fp->channels == 1 && |
| 637 | fp->formats == SNDRV_PCM_FMTBIT_S16_LE && |
| 638 | protocol == UAC_VERSION_1 && |
| 639 | le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == |
| 640 | fp->maxpacksize * 2) |
| 641 | continue; |
| 642 | |
| 643 | fp = kzalloc(sizeof(*fp), GFP_KERNEL); |
| 644 | if (! fp) { |
| 645 | snd_printk(KERN_ERR "cannot malloc\n"); |
| 646 | return -ENOMEM; |
| 647 | } |
| 648 | |
| 649 | fp->iface = iface_no; |
| 650 | fp->altsetting = altno; |
| 651 | fp->altset_idx = i; |
| 652 | fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress; |
| 653 | fp->ep_attr = get_endpoint(alts, 0)->bmAttributes; |
| 654 | fp->datainterval = snd_usb_parse_datainterval(chip, alts); |
Clemens Ladisch | 8f898e9 | 2013-01-31 21:39:17 +0100 | [diff] [blame] | 655 | fp->protocol = protocol; |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 656 | fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize); |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 657 | fp->channels = num_channels; |
| 658 | if (snd_usb_get_speed(dev) == USB_SPEED_HIGH) |
| 659 | fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1) |
| 660 | * (fp->maxpacksize & 0x7ff); |
| 661 | fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol, iface_no); |
| 662 | fp->clock = clock; |
Takashi Iwai | 04324cc | 2012-11-26 16:24:02 +0100 | [diff] [blame] | 663 | fp->chmap = convert_chmap(num_channels, chconfig, protocol); |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 664 | |
| 665 | /* some quirks for attributes here */ |
| 666 | |
| 667 | switch (chip->usb_id) { |
| 668 | case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */ |
| 669 | /* Optoplay sets the sample rate attribute although |
| 670 | * it seems not supporting it in fact. |
| 671 | */ |
| 672 | fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE; |
| 673 | break; |
| 674 | case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */ |
| 675 | case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */ |
| 676 | /* doesn't set the sample rate attribute, but supports it */ |
| 677 | fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE; |
| 678 | break; |
| 679 | case USB_ID(0x0763, 0x2001): /* M-Audio Quattro USB */ |
| 680 | case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro USB */ |
| 681 | case USB_ID(0x047f, 0x0ca1): /* plantronics headset */ |
| 682 | case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is |
| 683 | an older model 77d:223) */ |
| 684 | /* |
| 685 | * plantronics headset and Griffin iMic have set adaptive-in |
| 686 | * although it's really not... |
| 687 | */ |
| 688 | fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE; |
| 689 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 690 | fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE; |
| 691 | else |
| 692 | fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC; |
| 693 | break; |
| 694 | } |
| 695 | |
| 696 | /* ok, let's parse further... */ |
Clemens Ladisch | 8f898e9 | 2013-01-31 21:39:17 +0100 | [diff] [blame] | 697 | if (snd_usb_parse_audio_format(chip, fp, format, fmt, stream) < 0) { |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 698 | kfree(fp->rate_table); |
Takashi Iwai | 04324cc | 2012-11-26 16:24:02 +0100 | [diff] [blame] | 699 | kfree(fp->chmap); |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 700 | kfree(fp); |
| 701 | fp = NULL; |
| 702 | continue; |
| 703 | } |
| 704 | |
| 705 | snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint %#x\n", dev->devnum, iface_no, altno, fp->endpoint); |
| 706 | err = snd_usb_add_audio_stream(chip, stream, fp); |
| 707 | if (err < 0) { |
| 708 | kfree(fp->rate_table); |
Takashi Iwai | 04324cc | 2012-11-26 16:24:02 +0100 | [diff] [blame] | 709 | kfree(fp->chmap); |
Daniel Mack | e8e8bab | 2011-09-12 18:54:12 +0200 | [diff] [blame] | 710 | kfree(fp); |
| 711 | return err; |
| 712 | } |
| 713 | /* try to set the interface... */ |
| 714 | usb_set_interface(chip->dev, iface_no, altno); |
| 715 | snd_usb_init_pitch(chip, iface_no, alts, fp); |
| 716 | snd_usb_init_sample_rate(chip, iface_no, alts, fp, fp->rate_max); |
| 717 | } |
| 718 | return 0; |
| 719 | } |
| 720 | |