mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Takashi Iwai](/assets/img/avatar_default.png)
The recently introduced sample rate validation code seems causing a
problem on some devices; namely, after performing this, the bus gets
screwed and it influences even on other USB devices.
As a quick workaround, perform it only for the necessary devices;
currently MOTU devices are known to need the valid altset checks, so
filter out other devices.
Fixes: 93db51d06b
("ALSA: usb-audio: Check valid altsetting at parsing rates for UAC2/3")
Reported-by: Jamie Heilman <jamie@audible.transient.net>
BugLink: https://bugzilla.suse.com/show_bug.cgi?id=1178203
Link: https://lore.kernel.org/r/20210123155842.22652-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
820 lines
21 KiB
C
820 lines
21 KiB
C
// 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 */
|
|
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(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, 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_sndctrlpipe(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.
|
|
*/
|
|
switch (USB_ID_VENDOR(chip->usb_id)) {
|
|
case 0x07fd: /* MOTU */
|
|
break;
|
|
default:
|
|
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;
|
|
}
|