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.
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.
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
18 #include <linux/init.h>
19 #include <linux/usb.h>
20 #include <linux/usb/audio.h>
21 #include <linux/usb/audio-v2.h>
23 #include <sound/core.h>
24 #include <sound/pcm.h>
33 * parse the audio format type I descriptor
34 * and returns the corresponding pcm format
37 * @fp: audioformat record
38 * @format: the format tag (wFormatTag)
39 * @fmt: the format type descriptor
41 static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
42 struct audioformat *fp,
43 int format, void *_fmt,
46 int sample_width, sample_bytes;
51 struct uac_format_type_i_discrete_descriptor *fmt = _fmt;
52 sample_width = fmt->bBitResolution;
53 sample_bytes = fmt->bSubframeSize;
59 struct uac_format_type_i_ext_descriptor *fmt = _fmt;
60 sample_width = fmt->bBitResolution;
61 sample_bytes = fmt->bSubslotSize;
72 if (format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED)) {
73 /* some devices don't define this correctly... */
74 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
75 chip->dev->devnum, fp->iface, fp->altsetting);
76 format = 1 << UAC_FORMAT_TYPE_I_PCM;
78 if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) {
79 if (sample_width > sample_bytes * 8) {
80 snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
81 chip->dev->devnum, fp->iface, fp->altsetting,
82 sample_width, sample_bytes);
84 /* check the format byte size */
85 switch (sample_bytes) {
87 pcm_formats |= SNDRV_PCM_FMTBIT_S8;
90 if (snd_usb_is_big_endian_format(chip, fp))
91 pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */
93 pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE;
96 if (snd_usb_is_big_endian_format(chip, fp))
97 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */
99 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE;
102 pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE;
105 snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
106 chip->dev->devnum, fp->iface, fp->altsetting,
107 sample_width, sample_bytes);
111 if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) {
112 /* Dallas DS4201 workaround: it advertises U8 format, but really
114 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
115 pcm_formats |= SNDRV_PCM_FMTBIT_S8;
117 pcm_formats |= SNDRV_PCM_FMTBIT_U8;
119 if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) {
120 pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
122 if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) {
123 pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW;
125 if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) {
126 pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW;
128 if (format & ~0x3f) {
129 snd_printk(KERN_INFO "%d:%u:%d : unsupported format bits %#x\n",
130 chip->dev->devnum, fp->iface, fp->altsetting, format);
137 * parse the format descriptor and stores the possible sample rates
138 * on the audioformat table (audio class v1).
141 * @fp: audioformat record
142 * @fmt: the format descriptor
143 * @offset: the start offset of descriptor pointing the rate type
144 * (7 for type I and II, 8 for type II)
146 static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp,
147 unsigned char *fmt, int offset)
149 int nr_rates = fmt[offset];
151 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
152 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n",
153 chip->dev->devnum, fp->iface, fp->altsetting);
159 * build the rate table and bitmap flags
163 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
164 if (fp->rate_table == NULL) {
165 snd_printk(KERN_ERR "cannot malloc\n");
170 fp->rate_min = fp->rate_max = 0;
171 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
172 unsigned int rate = combine_triple(&fmt[idx]);
175 /* C-Media CM6501 mislabels its 96 kHz altsetting */
176 if (rate == 48000 && nr_rates == 1 &&
177 (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
178 chip->usb_id == USB_ID(0x0d8c, 0x0102)) &&
179 fp->altsetting == 5 && fp->maxpacksize == 392)
181 /* Creative VF0470 Live Cam reports 16 kHz instead of 8kHz */
182 if (rate == 16000 && chip->usb_id == USB_ID(0x041e, 0x4068))
185 fp->rate_table[fp->nr_rates] = rate;
186 if (!fp->rate_min || rate < fp->rate_min)
188 if (!fp->rate_max || rate > fp->rate_max)
190 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
194 hwc_debug("All rates were zero. Skipping format!\n");
198 /* continuous rates */
199 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
200 fp->rate_min = combine_triple(&fmt[offset + 1]);
201 fp->rate_max = combine_triple(&fmt[offset + 4]);
207 * parse the format descriptor and stores the possible sample rates
208 * on the audioformat table (audio class v2).
210 static int parse_audio_format_rates_v2(struct snd_usb_audio *chip,
211 struct audioformat *fp,
212 struct usb_host_interface *iface)
214 struct usb_device *dev = chip->dev;
215 unsigned char tmp[2], *data;
216 int i, nr_rates, data_size, ret = 0;
218 /* get the number of sample rates first by only fetching 2 bytes */
219 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
220 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
221 0x0100, chip->clock_id << 8, tmp, sizeof(tmp), 1000);
224 snd_printk(KERN_ERR "unable to retrieve number of sample rates\n");
228 nr_rates = (tmp[1] << 8) | tmp[0];
229 data_size = 2 + 12 * nr_rates;
230 data = kzalloc(data_size, GFP_KERNEL);
236 /* now get the full information */
237 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
238 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
239 0x0100, chip->clock_id << 8, data, data_size, 1000);
242 snd_printk(KERN_ERR "unable to retrieve sample rate range\n");
247 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
248 if (!fp->rate_table) {
254 fp->rate_min = fp->rate_max = 0;
256 for (i = 0; i < nr_rates; i++) {
257 int rate = combine_quad(&data[2 + 12 * i]);
259 fp->rate_table[fp->nr_rates] = rate;
260 if (!fp->rate_min || rate < fp->rate_min)
262 if (!fp->rate_max || rate > fp->rate_max)
264 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
275 * parse the format type I and III descriptors
277 static int parse_audio_format_i(struct snd_usb_audio *chip,
278 struct audioformat *fp,
279 int format, void *_fmt,
280 struct usb_host_interface *iface)
282 struct usb_interface_descriptor *altsd = get_iface_desc(iface);
283 struct uac_format_type_i_discrete_descriptor *fmt = _fmt;
284 int protocol = altsd->bInterfaceProtocol;
287 if (fmt->bFormatType == UAC_FORMAT_TYPE_III) {
288 /* FIXME: the format type is really IECxxx
289 * but we give normal PCM format to get the existing
292 switch (chip->usb_id) {
294 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
295 if (chip->setup == 0x00 &&
297 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
299 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
302 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
304 fp->formats = 1uLL << pcm_format;
306 fp->formats = parse_audio_format_i_type(chip, fp, format,
312 /* gather possible sample rates */
313 /* audio class v1 reports possible sample rates as part of the
314 * proprietary class specific descriptor.
315 * audio class v2 uses class specific EP0 range requests for that.
319 fp->channels = fmt->bNrChannels;
320 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 7);
323 /* fp->channels is already set in this case */
324 ret = parse_audio_format_rates_v2(chip, fp, iface);
328 if (fp->channels < 1) {
329 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
330 chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
338 * parse the format type II descriptor
340 static int parse_audio_format_ii(struct snd_usb_audio *chip,
341 struct audioformat *fp,
342 int format, void *_fmt,
343 struct usb_host_interface *iface)
345 int brate, framesize, ret;
346 struct usb_interface_descriptor *altsd = get_iface_desc(iface);
347 int protocol = altsd->bInterfaceProtocol;
350 case UAC_FORMAT_TYPE_II_AC3:
351 /* FIXME: there is no AC3 format defined yet */
352 // fp->formats = SNDRV_PCM_FMTBIT_AC3;
353 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
355 case UAC_FORMAT_TYPE_II_MPEG:
356 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
359 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag %#x is detected. processed as MPEG.\n",
360 chip->dev->devnum, fp->iface, fp->altsetting, format);
361 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
368 case UAC_VERSION_1: {
369 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
370 brate = le16_to_cpu(fmt->wMaxBitRate);
371 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
372 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
373 fp->frame_size = framesize;
374 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
377 case UAC_VERSION_2: {
378 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
379 brate = le16_to_cpu(fmt->wMaxBitRate);
380 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
381 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
382 fp->frame_size = framesize;
383 ret = parse_audio_format_rates_v2(chip, fp, iface);
391 int snd_usb_parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp,
392 int format, unsigned char *fmt, int stream,
393 struct usb_host_interface *iface)
398 case UAC_FORMAT_TYPE_I:
399 case UAC_FORMAT_TYPE_III:
400 err = parse_audio_format_i(chip, fp, format, fmt, iface);
402 case UAC_FORMAT_TYPE_II:
403 err = parse_audio_format_ii(chip, fp, format, fmt, iface);
406 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
407 chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
410 fp->fmt_type = fmt[3];
414 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
415 /* extigy apparently supports sample rates other than 48k
416 * but not in ordinary way. so we enable only 48k atm.
418 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
419 chip->usb_id == USB_ID(0x041e, 0x3020) ||
420 chip->usb_id == USB_ID(0x041e, 0x3061)) {
421 if (fmt[3] == UAC_FORMAT_TYPE_I &&
422 fp->rates != SNDRV_PCM_RATE_48000 &&
423 fp->rates != SNDRV_PCM_RATE_96000)