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linux/sound/usb/format.c
Jason Ormes 8f27b68906 ALSA: usb-audio: Line6 HX-Stomp XL USB_ID for 48k-fixed quirk 
Adding the Line6 HX-Stomp XL USB_ID as it needs this fixed frequency
quirk as well.

The device is basically just the HX-Stomp with some more buttons on
the face.  I've done some recording with it after adding it, and it
seems to function properly with this fix.  The Midi features appear to
be working as well.

[ a coding style fix and patch reformat by tiwai ]

Signed-off-by: Jason Ormes <skryking@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20211030200405.1358678-1-skryking@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-11-01 07:36:37 +01:00

820 lines
21 KiB
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Raw Blame History

// SPDX-License-Identifier: GPL-2.0-or-later
/*
*/
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/usb/audio.h>
#include <linux/usb/audio-v2.h>
#include <linux/usb/audio-v3.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include "usbaudio.h"
#include "card.h"
#include "quirks.h"
#include "helper.h"
#include "clock.h"
#include "format.h"
/*
* parse the audio format type I descriptor
* and returns the corresponding pcm format
*
* @dev: usb device
* @fp: audioformat record
* @format: the format tag (wFormatTag)
* @fmt: the format type descriptor (v1/v2) or AudioStreaming descriptor (v3)
*/
static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
struct audioformat *fp,
u64 format, void *_fmt)
{
int sample_width, sample_bytes;
u64 pcm_formats = 0;
switch (fp->protocol) {
case UAC_VERSION_1:
default: {
struct uac_format_type_i_discrete_descriptor *fmt = _fmt;
if (format >= 64)
return 0; /* invalid format */
sample_width = fmt->bBitResolution;
sample_bytes = fmt->bSubframeSize;
format = 1ULL << format;
break;
}
case UAC_VERSION_2: {
struct uac_format_type_i_ext_descriptor *fmt = _fmt;
sample_width = fmt->bBitResolution;
sample_bytes = fmt->bSubslotSize;
if (format & UAC2_FORMAT_TYPE_I_RAW_DATA) {
pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
/* flag potentially raw DSD capable altsettings */
fp->dsd_raw = true;
}
format <<= 1;
break;
}
case UAC_VERSION_3: {
struct uac3_as_header_descriptor *as = _fmt;
sample_width = as->bBitResolution;
sample_bytes = as->bSubslotSize;
if (format & UAC3_FORMAT_TYPE_I_RAW_DATA)
pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
format <<= 1;
break;
}
}
fp->fmt_bits = sample_width;
if ((pcm_formats == 0) &&
(format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED))) {
/* some devices don't define this correctly... */
usb_audio_info(chip, "%u:%d : format type 0 is detected, processed as PCM\n",
fp->iface, fp->altsetting);
format = 1 << UAC_FORMAT_TYPE_I_PCM;
}
if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) {
if (((chip->usb_id == USB_ID(0x0582, 0x0016)) ||
/* Edirol SD-90 */
(chip->usb_id == USB_ID(0x0582, 0x000c))) &&
/* Roland SC-D70 */
sample_width == 24 && sample_bytes == 2)
sample_bytes = 3;
else if (sample_width > sample_bytes * 8) {
usb_audio_info(chip, "%u:%d : sample bitwidth %d in over sample bytes %d\n",
fp->iface, fp->altsetting,
sample_width, sample_bytes);
}
/* check the format byte size */
switch (sample_bytes) {
case 1:
pcm_formats |= SNDRV_PCM_FMTBIT_S8;
break;
case 2:
if (snd_usb_is_big_endian_format(chip, fp))
pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */
else
pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE;
break;
case 3:
if (snd_usb_is_big_endian_format(chip, fp))
pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */
else
pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE;
break;
case 4:
pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE;
break;
default:
usb_audio_info(chip,
"%u:%d : unsupported sample bitwidth %d in %d bytes\n",
fp->iface, fp->altsetting,
sample_width, sample_bytes);
break;
}
}
if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) {
/* Dallas DS4201 workaround: it advertises U8 format, but really
supports S8. */
if (chip->usb_id == USB_ID(0x04fa, 0x4201))
pcm_formats |= SNDRV_PCM_FMTBIT_S8;
else
pcm_formats |= SNDRV_PCM_FMTBIT_U8;
}
if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) {
pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
}
if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) {
pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW;
}
if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) {
pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW;
}
if (format & ~0x3f) {
usb_audio_info(chip,
"%u:%d : unsupported format bits %#llx\n",
fp->iface, fp->altsetting, format);
}
pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes);
return pcm_formats;
}
static int set_fixed_rate(struct audioformat *fp, int rate, int rate_bits)
{
kfree(fp->rate_table);
fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL);
if (!fp->rate_table)
return -ENOMEM;
fp->nr_rates = 1;
fp->rate_min = rate;
fp->rate_max = rate;
fp->rates = rate_bits;
fp->rate_table[0] = rate;
return 0;
}
/* set up rate_min, rate_max and rates from the rate table */
static void set_rate_table_min_max(struct audioformat *fp)
{
unsigned int rate;
int i;
fp->rate_min = INT_MAX;
fp->rate_max = 0;
fp->rates = 0;
for (i = 0; i < fp->nr_rates; i++) {
rate = fp->rate_table[i];
fp->rate_min = min(fp->rate_min, rate);
fp->rate_max = max(fp->rate_max, rate);
fp->rates |= snd_pcm_rate_to_rate_bit(rate);
}
}
/*
* parse the format descriptor and stores the possible sample rates
* on the audioformat table (audio class v1).
*
* @dev: usb device
* @fp: audioformat record
* @fmt: the format descriptor
* @offset: the start offset of descriptor pointing the rate type
* (7 for type I and II, 8 for type II)
*/
static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp,
unsigned char *fmt, int offset)
{
int nr_rates = fmt[offset];
if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
usb_audio_err(chip,
"%u:%d : invalid UAC_FORMAT_TYPE desc\n",
fp->iface, fp->altsetting);
return -EINVAL;
}
if (nr_rates) {
/*
* build the rate table and bitmap flags
*/
int r, idx;
fp->rate_table = kmalloc_array(nr_rates, sizeof(int),
GFP_KERNEL);
if (fp->rate_table == NULL)
return -ENOMEM;
fp->nr_rates = 0;
for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
unsigned int rate = combine_triple(&fmt[idx]);
if (!rate)
continue;
/* C-Media CM6501 mislabels its 96 kHz altsetting */
/* Terratec Aureon 7.1 USB C-Media 6206, too */
/* Ozone Z90 USB C-Media, too */
if (rate == 48000 && nr_rates == 1 &&
(chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
chip->usb_id == USB_ID(0x0d8c, 0x0102) ||
chip->usb_id == USB_ID(0x0d8c, 0x0078) ||
chip->usb_id == USB_ID(0x0ccd, 0x00b1)) &&
fp->altsetting == 5 && fp->maxpacksize == 392)
rate = 96000;
/* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */
if (rate == 16000 &&
(chip->usb_id == USB_ID(0x041e, 0x4064) ||
chip->usb_id == USB_ID(0x041e, 0x4068)))
rate = 8000;
fp->rate_table[fp->nr_rates++] = rate;
}
if (!fp->nr_rates) {
usb_audio_info(chip,
"%u:%d: All rates were zero\n",
fp->iface, fp->altsetting);
return -EINVAL;
}
set_rate_table_min_max(fp);
} else {
/* continuous rates */
fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
fp->rate_min = combine_triple(&fmt[offset + 1]);
fp->rate_max = combine_triple(&fmt[offset + 4]);
}
/* Jabra Evolve 65 headset */
if (chip->usb_id == USB_ID(0x0b0e, 0x030b)) {
/* only 48kHz for playback while keeping 16kHz for capture */
if (fp->nr_rates != 1)
return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
}
return 0;
}
/*
* Presonus Studio 1810c supports a limited set of sampling
* rates per altsetting but reports the full set each time.
* If we don't filter out the unsupported rates and attempt
* to configure the card, it will hang refusing to do any
* further audio I/O until a hard reset is performed.
*
* The list of supported rates per altsetting (set of available
* I/O channels) is described in the owner's manual, section 2.2.
*/
static bool s1810c_valid_sample_rate(struct audioformat *fp,
unsigned int rate)
{
switch (fp->altsetting) {
case 1:
/* All ADAT ports available */
return rate <= 48000;
case 2:
/* Half of ADAT ports available */
return (rate == 88200 || rate == 96000);
case 3:
/* Analog I/O only (no S/PDIF nor ADAT) */
return rate >= 176400;
default:
return false;
}
return false;
}
/*
* Many Focusrite devices supports a limited set of sampling rates per
* altsetting. Maximum rate is exposed in the last 4 bytes of Format Type
* descriptor which has a non-standard bLength = 10.
*/
static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip,
struct audioformat *fp,
unsigned int rate)
{
struct usb_interface *iface;
struct usb_host_interface *alts;
unsigned char *fmt;
unsigned int max_rate;
iface = usb_ifnum_to_if(chip->dev, fp->iface);
if (!iface)
return true;
alts = &iface->altsetting[fp->altset_idx];
fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen,
NULL, UAC_FORMAT_TYPE);
if (!fmt)
return true;
if (fmt[0] == 10) { /* bLength */
max_rate = combine_quad(&fmt[6]);
/* Validate max rate */
if (max_rate != 48000 &&
max_rate != 96000 &&
max_rate != 192000 &&
max_rate != 384000) {
usb_audio_info(chip,
"%u:%d : unexpected max rate: %u\n",
fp->iface, fp->altsetting, max_rate);
return true;
}
return rate <= max_rate;
}
return true;
}
/*
* Helper function to walk the array of sample rate triplets reported by
* the device. The problem is that we need to parse whole array first to
* get to know how many sample rates we have to expect.
* Then fp->rate_table can be allocated and filled.
*/
static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
struct audioformat *fp, int nr_triplets,
const unsigned char *data)
{
int i, nr_rates = 0;
for (i = 0; i < nr_triplets; i++) {
int min = combine_quad(&data[2 + 12 * i]);
int max = combine_quad(&data[6 + 12 * i]);
int res = combine_quad(&data[10 + 12 * i]);
unsigned int rate;
if ((max < 0) || (min < 0) || (res < 0) || (max < min))
continue;
/*
* for ranges with res == 1, we announce a continuous sample
* rate range, and this function should return 0 for no further
* parsing.
*/
if (res == 1) {
fp->rate_min = min;
fp->rate_max = max;
fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
return 0;
}
for (rate = min; rate <= max; rate += res) {
/* Filter out invalid rates on Presonus Studio 1810c */
if (chip->usb_id == USB_ID(0x0194f, 0x010c) &&
!s1810c_valid_sample_rate(fp, rate))
goto skip_rate;
/* Filter out invalid rates on Focusrite devices */
if (USB_ID_VENDOR(chip->usb_id) == 0x1235 &&
!focusrite_valid_sample_rate(chip, fp, rate))
goto skip_rate;
if (fp->rate_table)
fp->rate_table[nr_rates] = rate;
nr_rates++;
if (nr_rates >= MAX_NR_RATES) {
usb_audio_err(chip, "invalid uac2 rates\n");
break;
}
skip_rate:
/* avoid endless loop */
if (res == 0)
break;
}
}
return nr_rates;
}
/* Line6 Helix series and the Rode Rodecaster Pro don't support the
* UAC2_CS_RANGE usb function call. Return a static table of known
* clock rates.
*/
static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip,
struct audioformat *fp)
{
switch (chip->usb_id) {
case USB_ID(0x0e41, 0x4241): /* Line6 Helix */
case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */
case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */
case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */
case USB_ID(0x0e41, 0x4253): /* Line6 HX-Stomp XL */
case USB_ID(0x0e41, 0x4247): /* Line6 Pod Go */
case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */
case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */
case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */
case USB_ID(0x19f7, 0x0011): /* Rode Rodecaster Pro */
return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
}
return -ENODEV;
}
/* check whether the given altsetting is supported for the already set rate */
static bool check_valid_altsetting_v2v3(struct snd_usb_audio *chip, int iface,
int altsetting)
{
struct usb_device *dev = chip->dev;
__le64 raw_data = 0;
u64 data;
int err;
/* we assume 64bit is enough for any altsettings */
if (snd_BUG_ON(altsetting >= 64 - 8))
return false;
err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
UAC2_AS_VAL_ALT_SETTINGS << 8,
iface, &raw_data, sizeof(raw_data));
if (err < 0)
return false;
data = le64_to_cpu(raw_data);
/* first byte contains the bitmap size */
if ((data & 0xff) * 8 < altsetting)
return false;
if (data & (1ULL << (altsetting + 8)))
return true;
return false;
}
/*
* Validate each sample rate with the altsetting
* Rebuild the rate table if only partial values are valid
*/
static int validate_sample_rate_table_v2v3(struct snd_usb_audio *chip,
struct audioformat *fp,
int clock)
{
struct usb_device *dev = chip->dev;
unsigned int *table;
unsigned int nr_rates;
int i, err;
/* performing the rate verification may lead to unexpected USB bus
* behavior afterwards by some unknown reason. Do this only for the
* known devices.
*/
if (!(chip->quirk_flags & QUIRK_FLAG_VALIDATE_RATES))
return 0; /* don't perform the validation as default */
table = kcalloc(fp->nr_rates, sizeof(*table), GFP_KERNEL);
if (!table)
return -ENOMEM;
/* clear the interface altsetting at first */
usb_set_interface(dev, fp->iface, 0);
nr_rates = 0;
for (i = 0; i < fp->nr_rates; i++) {
err = snd_usb_set_sample_rate_v2v3(chip, fp, clock,
fp->rate_table[i]);
if (err < 0)
continue;
if (check_valid_altsetting_v2v3(chip, fp->iface, fp->altsetting))
table[nr_rates++] = fp->rate_table[i];
}
if (!nr_rates) {
usb_audio_dbg(chip,
"No valid sample rate available for %d:%d, assuming a firmware bug\n",
fp->iface, fp->altsetting);
nr_rates = fp->nr_rates; /* continue as is */
}
if (fp->nr_rates == nr_rates) {
kfree(table);
return 0;
}
kfree(fp->rate_table);
fp->rate_table = table;
fp->nr_rates = nr_rates;
return 0;
}
/*
* parse the format descriptor and stores the possible sample rates
* on the audioformat table (audio class v2 and v3).
*/
static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
struct audioformat *fp)
{
struct usb_device *dev = chip->dev;
unsigned char tmp[2], *data;
int nr_triplets, data_size, ret = 0, ret_l6;
int clock = snd_usb_clock_find_source(chip, fp, false);
if (clock < 0) {
dev_err(&dev->dev,
"%s(): unable to find clock source (clock %d)\n",
__func__, clock);
goto err;
}
/* get the number of sample rates first by only fetching 2 bytes */
ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
UAC2_CS_CONTROL_SAM_FREQ << 8,
snd_usb_ctrl_intf(chip) | (clock << 8),
tmp, sizeof(tmp));
if (ret < 0) {
/* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */
ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);
if (ret_l6 == -ENODEV) {
/* no line6 device found continue showing the error */
dev_err(&dev->dev,
"%s(): unable to retrieve number of sample rates (clock %d)\n",
__func__, clock);
goto err;
}
if (ret_l6 == 0) {
dev_info(&dev->dev,
"%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",
__func__, clock);
return 0;
}
ret = ret_l6;
goto err;
}
nr_triplets = (tmp[1] << 8) | tmp[0];
data_size = 2 + 12 * nr_triplets;
data = kzalloc(data_size, GFP_KERNEL);
if (!data) {
ret = -ENOMEM;
goto err;
}
/* now get the full information */
ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
UAC2_CS_CONTROL_SAM_FREQ << 8,
snd_usb_ctrl_intf(chip) | (clock << 8),
data, data_size);
if (ret < 0) {
dev_err(&dev->dev,
"%s(): unable to retrieve sample rate range (clock %d)\n",
__func__, clock);
ret = -EINVAL;
goto err_free;
}
/* Call the triplet parser, and make sure fp->rate_table is NULL.
* We just use the return value to know how many sample rates we
* will have to deal with. */
kfree(fp->rate_table);
fp->rate_table = NULL;
fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
if (fp->nr_rates == 0) {
/* SNDRV_PCM_RATE_CONTINUOUS */
ret = 0;
goto err_free;
}
fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL);
if (!fp->rate_table) {
ret = -ENOMEM;
goto err_free;
}
/* Call the triplet parser again, but this time, fp->rate_table is
* allocated, so the rates will be stored */
parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
ret = validate_sample_rate_table_v2v3(chip, fp, clock);
if (ret < 0)
goto err_free;
set_rate_table_min_max(fp);
err_free:
kfree(data);
err:
return ret;
}
/*
* parse the format type I and III descriptors
*/
static int parse_audio_format_i(struct snd_usb_audio *chip,
struct audioformat *fp, u64 format,
void *_fmt)
{
snd_pcm_format_t pcm_format;
unsigned int fmt_type;
int ret;
switch (fp->protocol) {
default:
case UAC_VERSION_1:
case UAC_VERSION_2: {
struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
fmt_type = fmt->bFormatType;
break;
}
case UAC_VERSION_3: {
/* fp->fmt_type is already set in this case */
fmt_type = fp->fmt_type;
break;
}
}
if (fmt_type == UAC_FORMAT_TYPE_III) {
/* FIXME: the format type is really IECxxx
* but we give normal PCM format to get the existing
* apps working...
*/
switch (chip->usb_id) {
case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
if (chip->setup == 0x00 &&
fp->altsetting == 6)
pcm_format = SNDRV_PCM_FORMAT_S16_BE;
else
pcm_format = SNDRV_PCM_FORMAT_S16_LE;
break;
default:
pcm_format = SNDRV_PCM_FORMAT_S16_LE;
}
fp->formats = pcm_format_to_bits(pcm_format);
} else {
fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
if (!fp->formats)
return -EINVAL;
}
/* gather possible sample rates */
/* audio class v1 reports possible sample rates as part of the
* proprietary class specific descriptor.
* audio class v2 uses class specific EP0 range requests for that.
*/
switch (fp->protocol) {
default:
case UAC_VERSION_1: {
struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
fp->channels = fmt->bNrChannels;
ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
break;
}
case UAC_VERSION_2:
case UAC_VERSION_3: {
/* fp->channels is already set in this case */
ret = parse_audio_format_rates_v2v3(chip, fp);
break;
}
}
if (fp->channels < 1) {
usb_audio_err(chip,
"%u:%d : invalid channels %d\n",
fp->iface, fp->altsetting, fp->channels);
return -EINVAL;
}
return ret;
}
/*
* parse the format type II descriptor
*/
static int parse_audio_format_ii(struct snd_usb_audio *chip,
struct audioformat *fp,
u64 format, void *_fmt)
{
int brate, framesize, ret;
switch (format) {
case UAC_FORMAT_TYPE_II_AC3:
/* FIXME: there is no AC3 format defined yet */
// fp->formats = SNDRV_PCM_FMTBIT_AC3;
fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
break;
case UAC_FORMAT_TYPE_II_MPEG:
fp->formats = SNDRV_PCM_FMTBIT_MPEG;
break;
default:
usb_audio_info(chip,
"%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n",
fp->iface, fp->altsetting, format);
fp->formats = SNDRV_PCM_FMTBIT_MPEG;
break;
}
fp->channels = 1;
switch (fp->protocol) {
default:
case UAC_VERSION_1: {
struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
brate = le16_to_cpu(fmt->wMaxBitRate);
framesize = le16_to_cpu(fmt->wSamplesPerFrame);
usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
fp->frame_size = framesize;
ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
break;
}
case UAC_VERSION_2: {
struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
brate = le16_to_cpu(fmt->wMaxBitRate);
framesize = le16_to_cpu(fmt->wSamplesPerFrame);
usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
fp->frame_size = framesize;
ret = parse_audio_format_rates_v2v3(chip, fp);
break;
}
}
return ret;
}
int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
struct audioformat *fp, u64 format,
struct uac_format_type_i_continuous_descriptor *fmt,
int stream)
{
int err;
switch (fmt->bFormatType) {
case UAC_FORMAT_TYPE_I:
case UAC_FORMAT_TYPE_III:
err = parse_audio_format_i(chip, fp, format, fmt);
break;
case UAC_FORMAT_TYPE_II:
err = parse_audio_format_ii(chip, fp, format, fmt);
break;
default:
usb_audio_info(chip,
"%u:%d : format type %d is not supported yet\n",
fp->iface, fp->altsetting,
fmt->bFormatType);
return -ENOTSUPP;
}
fp->fmt_type = fmt->bFormatType;
if (err < 0)
return err;
#if 1
/* FIXME: temporary hack for extigy/audigy 2 nx/zs */
/* extigy apparently supports sample rates other than 48k
* but not in ordinary way. so we enable only 48k atm.
*/
if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
chip->usb_id == USB_ID(0x041e, 0x3020) ||
chip->usb_id == USB_ID(0x041e, 0x3061)) {
if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
fp->rates != SNDRV_PCM_RATE_48000 &&
fp->rates != SNDRV_PCM_RATE_96000)
return -ENOTSUPP;
}
#endif
return 0;
}
int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
struct audioformat *fp,
struct uac3_as_header_descriptor *as,
int stream)
{
u64 format = le64_to_cpu(as->bmFormats);
int err;
/*
* Type I format bits are D0..D6
* This test works because type IV is not supported
*/
if (format & 0x7f)
fp->fmt_type = UAC_FORMAT_TYPE_I;
else
fp->fmt_type = UAC_FORMAT_TYPE_III;
err = parse_audio_format_i(chip, fp, format, as);
if (err < 0)
return err;
return 0;
}
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