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/slab.h>
20 #include <linux/usb.h>
21 #include <linux/usb/audio.h>
22 #include <linux/usb/audio-v2.h>
24 #include <sound/core.h>
25 #include <sound/pcm.h>
34 * parse the audio format type I descriptor
35 * and returns the corresponding pcm format
38 * @fp: audioformat record
39 * @format: the format tag (wFormatTag)
40 * @fmt: the format type descriptor
42 static u64
parse_audio_format_i_type(struct snd_usb_audio
*chip
,
43 struct audioformat
*fp
,
44 int format
, void *_fmt
,
47 int sample_width
, sample_bytes
;
52 struct uac_format_type_i_discrete_descriptor
*fmt
= _fmt
;
53 sample_width
= fmt
->bBitResolution
;
54 sample_bytes
= fmt
->bSubframeSize
;
60 struct uac_format_type_i_ext_descriptor
*fmt
= _fmt
;
61 sample_width
= fmt
->bBitResolution
;
62 sample_bytes
= fmt
->bSubslotSize
;
73 if (format
== 0 || format
== (1 << UAC_FORMAT_TYPE_I_UNDEFINED
)) {
74 /* some devices don't define this correctly... */
75 snd_printdd(KERN_INFO
"%d:%u:%d : format type 0 is detected, processed as PCM\n",
76 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
);
77 format
= 1 << UAC_FORMAT_TYPE_I_PCM
;
79 if (format
& (1 << UAC_FORMAT_TYPE_I_PCM
)) {
80 if (sample_width
> sample_bytes
* 8) {
81 snd_printk(KERN_INFO
"%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
82 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
,
83 sample_width
, sample_bytes
);
85 /* check the format byte size */
86 switch (sample_bytes
) {
88 pcm_formats
|= SNDRV_PCM_FMTBIT_S8
;
91 if (snd_usb_is_big_endian_format(chip
, fp
))
92 pcm_formats
|= SNDRV_PCM_FMTBIT_S16_BE
; /* grrr, big endian!! */
94 pcm_formats
|= SNDRV_PCM_FMTBIT_S16_LE
;
97 if (snd_usb_is_big_endian_format(chip
, fp
))
98 pcm_formats
|= SNDRV_PCM_FMTBIT_S24_3BE
; /* grrr, big endian!! */
100 pcm_formats
|= SNDRV_PCM_FMTBIT_S24_3LE
;
103 pcm_formats
|= SNDRV_PCM_FMTBIT_S32_LE
;
106 snd_printk(KERN_INFO
"%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
107 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
,
108 sample_width
, sample_bytes
);
112 if (format
& (1 << UAC_FORMAT_TYPE_I_PCM8
)) {
113 /* Dallas DS4201 workaround: it advertises U8 format, but really
115 if (chip
->usb_id
== USB_ID(0x04fa, 0x4201))
116 pcm_formats
|= SNDRV_PCM_FMTBIT_S8
;
118 pcm_formats
|= SNDRV_PCM_FMTBIT_U8
;
120 if (format
& (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT
)) {
121 pcm_formats
|= SNDRV_PCM_FMTBIT_FLOAT_LE
;
123 if (format
& (1 << UAC_FORMAT_TYPE_I_ALAW
)) {
124 pcm_formats
|= SNDRV_PCM_FMTBIT_A_LAW
;
126 if (format
& (1 << UAC_FORMAT_TYPE_I_MULAW
)) {
127 pcm_formats
|= SNDRV_PCM_FMTBIT_MU_LAW
;
129 if (format
& ~0x3f) {
130 snd_printk(KERN_INFO
"%d:%u:%d : unsupported format bits %#x\n",
131 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, format
);
138 * parse the format descriptor and stores the possible sample rates
139 * on the audioformat table (audio class v1).
142 * @fp: audioformat record
143 * @fmt: the format descriptor
144 * @offset: the start offset of descriptor pointing the rate type
145 * (7 for type I and II, 8 for type II)
147 static int parse_audio_format_rates_v1(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
148 unsigned char *fmt
, int offset
)
150 int nr_rates
= fmt
[offset
];
152 if (fmt
[0] < offset
+ 1 + 3 * (nr_rates
? nr_rates
: 2)) {
153 snd_printk(KERN_ERR
"%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n",
154 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
);
160 * build the rate table and bitmap flags
164 fp
->rate_table
= kmalloc(sizeof(int) * nr_rates
, GFP_KERNEL
);
165 if (fp
->rate_table
== NULL
) {
166 snd_printk(KERN_ERR
"cannot malloc\n");
171 fp
->rate_min
= fp
->rate_max
= 0;
172 for (r
= 0, idx
= offset
+ 1; r
< nr_rates
; r
++, idx
+= 3) {
173 unsigned int rate
= combine_triple(&fmt
[idx
]);
176 /* C-Media CM6501 mislabels its 96 kHz altsetting */
177 if (rate
== 48000 && nr_rates
== 1 &&
178 (chip
->usb_id
== USB_ID(0x0d8c, 0x0201) ||
179 chip
->usb_id
== USB_ID(0x0d8c, 0x0102)) &&
180 fp
->altsetting
== 5 && fp
->maxpacksize
== 392)
182 /* Creative VF0470 Live Cam reports 16 kHz instead of 8kHz */
183 if (rate
== 16000 && chip
->usb_id
== USB_ID(0x041e, 0x4068))
186 fp
->rate_table
[fp
->nr_rates
] = rate
;
187 if (!fp
->rate_min
|| rate
< fp
->rate_min
)
189 if (!fp
->rate_max
|| rate
> fp
->rate_max
)
191 fp
->rates
|= snd_pcm_rate_to_rate_bit(rate
);
195 hwc_debug("All rates were zero. Skipping format!\n");
199 /* continuous rates */
200 fp
->rates
= SNDRV_PCM_RATE_CONTINUOUS
;
201 fp
->rate_min
= combine_triple(&fmt
[offset
+ 1]);
202 fp
->rate_max
= combine_triple(&fmt
[offset
+ 4]);
208 * parse the format descriptor and stores the possible sample rates
209 * on the audioformat table (audio class v2).
211 static int parse_audio_format_rates_v2(struct snd_usb_audio
*chip
,
212 struct audioformat
*fp
,
213 struct usb_host_interface
*iface
)
215 struct usb_device
*dev
= chip
->dev
;
216 unsigned char tmp
[2], *data
;
217 int i
, nr_rates
, data_size
, ret
= 0;
219 /* get the number of sample rates first by only fetching 2 bytes */
220 ret
= snd_usb_ctl_msg(dev
, usb_rcvctrlpipe(dev
, 0), UAC2_CS_RANGE
,
221 USB_TYPE_CLASS
| USB_RECIP_INTERFACE
| USB_DIR_IN
,
222 UAC2_CS_CONTROL_SAM_FREQ
<< 8, chip
->clock_id
<< 8,
223 tmp
, sizeof(tmp
), 1000);
226 snd_printk(KERN_ERR
"unable to retrieve number of sample rates\n");
230 nr_rates
= (tmp
[1] << 8) | tmp
[0];
231 data_size
= 2 + 12 * nr_rates
;
232 data
= kzalloc(data_size
, GFP_KERNEL
);
238 /* now get the full information */
239 ret
= snd_usb_ctl_msg(dev
, usb_rcvctrlpipe(dev
, 0), UAC2_CS_RANGE
,
240 USB_TYPE_CLASS
| USB_RECIP_INTERFACE
| USB_DIR_IN
,
241 UAC2_CS_CONTROL_SAM_FREQ
<< 8, chip
->clock_id
<< 8,
242 data
, data_size
, 1000);
245 snd_printk(KERN_ERR
"unable to retrieve sample rate range\n");
250 fp
->rate_table
= kmalloc(sizeof(int) * nr_rates
, GFP_KERNEL
);
251 if (!fp
->rate_table
) {
257 fp
->rate_min
= fp
->rate_max
= 0;
259 for (i
= 0; i
< nr_rates
; i
++) {
260 int rate
= combine_quad(&data
[2 + 12 * i
]);
262 fp
->rate_table
[fp
->nr_rates
] = rate
;
263 if (!fp
->rate_min
|| rate
< fp
->rate_min
)
265 if (!fp
->rate_max
|| rate
> fp
->rate_max
)
267 fp
->rates
|= snd_pcm_rate_to_rate_bit(rate
);
278 * parse the format type I and III descriptors
280 static int parse_audio_format_i(struct snd_usb_audio
*chip
,
281 struct audioformat
*fp
, int format
,
282 struct uac_format_type_i_continuous_descriptor
*fmt
,
283 struct usb_host_interface
*iface
)
285 struct usb_interface_descriptor
*altsd
= get_iface_desc(iface
);
286 int protocol
= altsd
->bInterfaceProtocol
;
289 if (fmt
->bFormatType
== UAC_FORMAT_TYPE_III
) {
290 /* FIXME: the format type is really IECxxx
291 * but we give normal PCM format to get the existing
294 switch (chip
->usb_id
) {
296 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
297 if (chip
->setup
== 0x00 &&
299 pcm_format
= SNDRV_PCM_FORMAT_S16_BE
;
301 pcm_format
= SNDRV_PCM_FORMAT_S16_LE
;
304 pcm_format
= SNDRV_PCM_FORMAT_S16_LE
;
306 fp
->formats
= 1uLL << pcm_format
;
308 fp
->formats
= parse_audio_format_i_type(chip
, fp
, format
,
314 /* gather possible sample rates */
315 /* audio class v1 reports possible sample rates as part of the
316 * proprietary class specific descriptor.
317 * audio class v2 uses class specific EP0 range requests for that.
321 fp
->channels
= fmt
->bNrChannels
;
322 ret
= parse_audio_format_rates_v1(chip
, fp
, (unsigned char *) fmt
, 7);
325 /* fp->channels is already set in this case */
326 ret
= parse_audio_format_rates_v2(chip
, fp
, iface
);
330 if (fp
->channels
< 1) {
331 snd_printk(KERN_ERR
"%d:%u:%d : invalid channels %d\n",
332 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, fp
->channels
);
340 * parse the format type II descriptor
342 static int parse_audio_format_ii(struct snd_usb_audio
*chip
,
343 struct audioformat
*fp
,
344 int format
, void *_fmt
,
345 struct usb_host_interface
*iface
)
347 int brate
, framesize
, ret
;
348 struct usb_interface_descriptor
*altsd
= get_iface_desc(iface
);
349 int protocol
= altsd
->bInterfaceProtocol
;
352 case UAC_FORMAT_TYPE_II_AC3
:
353 /* FIXME: there is no AC3 format defined yet */
354 // fp->formats = SNDRV_PCM_FMTBIT_AC3;
355 fp
->formats
= SNDRV_PCM_FMTBIT_U8
; /* temporary hack to receive byte streams */
357 case UAC_FORMAT_TYPE_II_MPEG
:
358 fp
->formats
= SNDRV_PCM_FMTBIT_MPEG
;
361 snd_printd(KERN_INFO
"%d:%u:%d : unknown format tag %#x is detected. processed as MPEG.\n",
362 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, format
);
363 fp
->formats
= SNDRV_PCM_FMTBIT_MPEG
;
370 case UAC_VERSION_1
: {
371 struct uac_format_type_ii_discrete_descriptor
*fmt
= _fmt
;
372 brate
= le16_to_cpu(fmt
->wMaxBitRate
);
373 framesize
= le16_to_cpu(fmt
->wSamplesPerFrame
);
374 snd_printd(KERN_INFO
"found format II with max.bitrate = %d, frame size=%d\n", brate
, framesize
);
375 fp
->frame_size
= framesize
;
376 ret
= parse_audio_format_rates_v1(chip
, fp
, _fmt
, 8); /* fmt[8..] sample rates */
379 case UAC_VERSION_2
: {
380 struct uac_format_type_ii_ext_descriptor
*fmt
= _fmt
;
381 brate
= le16_to_cpu(fmt
->wMaxBitRate
);
382 framesize
= le16_to_cpu(fmt
->wSamplesPerFrame
);
383 snd_printd(KERN_INFO
"found format II with max.bitrate = %d, frame size=%d\n", brate
, framesize
);
384 fp
->frame_size
= framesize
;
385 ret
= parse_audio_format_rates_v2(chip
, fp
, iface
);
393 int snd_usb_parse_audio_format(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
394 int format
, struct uac_format_type_i_continuous_descriptor
*fmt
,
395 int stream
, struct usb_host_interface
*iface
)
399 switch (fmt
->bFormatType
) {
400 case UAC_FORMAT_TYPE_I
:
401 case UAC_FORMAT_TYPE_III
:
402 err
= parse_audio_format_i(chip
, fp
, format
, fmt
, iface
);
404 case UAC_FORMAT_TYPE_II
:
405 err
= parse_audio_format_ii(chip
, fp
, format
, fmt
, iface
);
408 snd_printd(KERN_INFO
"%d:%u:%d : format type %d is not supported yet\n",
409 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
,
413 fp
->fmt_type
= fmt
->bFormatType
;
417 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
418 /* extigy apparently supports sample rates other than 48k
419 * but not in ordinary way. so we enable only 48k atm.
421 if (chip
->usb_id
== USB_ID(0x041e, 0x3000) ||
422 chip
->usb_id
== USB_ID(0x041e, 0x3020) ||
423 chip
->usb_id
== USB_ID(0x041e, 0x3061)) {
424 if (fmt
->bFormatType
== UAC_FORMAT_TYPE_I
&&
425 fp
->rates
!= SNDRV_PCM_RATE_48000
&&
426 fp
->rates
!= SNDRV_PCM_RATE_96000
)