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820 lines
21 KiB
820 lines
21 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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*/ |
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|
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#include <linux/init.h> |
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#include <linux/slab.h> |
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#include <linux/usb.h> |
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#include <linux/usb/audio.h> |
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#include <linux/usb/audio-v2.h> |
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#include <linux/usb/audio-v3.h> |
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#include <sound/core.h> |
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#include <sound/pcm.h> |
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#include "usbaudio.h" |
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#include "card.h" |
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#include "quirks.h" |
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#include "helper.h" |
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#include "clock.h" |
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#include "format.h" |
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/* |
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* parse the audio format type I descriptor |
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* and returns the corresponding pcm format |
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* |
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* @dev: usb device |
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* @fp: audioformat record |
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* @format: the format tag (wFormatTag) |
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* @fmt: the format type descriptor (v1/v2) or AudioStreaming descriptor (v3) |
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*/ |
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static u64 parse_audio_format_i_type(struct snd_usb_audio *chip, |
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struct audioformat *fp, |
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u64 format, void *_fmt) |
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{ |
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int sample_width, sample_bytes; |
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u64 pcm_formats = 0; |
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|
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switch (fp->protocol) { |
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case UAC_VERSION_1: |
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default: { |
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struct uac_format_type_i_discrete_descriptor *fmt = _fmt; |
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if (format >= 64) |
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return 0; /* invalid format */ |
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sample_width = fmt->bBitResolution; |
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sample_bytes = fmt->bSubframeSize; |
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format = 1ULL << format; |
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break; |
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} |
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case UAC_VERSION_2: { |
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struct uac_format_type_i_ext_descriptor *fmt = _fmt; |
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sample_width = fmt->bBitResolution; |
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sample_bytes = fmt->bSubslotSize; |
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if (format & UAC2_FORMAT_TYPE_I_RAW_DATA) { |
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pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL; |
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/* flag potentially raw DSD capable altsettings */ |
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fp->dsd_raw = true; |
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} |
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format <<= 1; |
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break; |
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} |
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case UAC_VERSION_3: { |
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struct uac3_as_header_descriptor *as = _fmt; |
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sample_width = as->bBitResolution; |
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sample_bytes = as->bSubslotSize; |
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if (format & UAC3_FORMAT_TYPE_I_RAW_DATA) |
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pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL; |
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format <<= 1; |
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break; |
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} |
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} |
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fp->fmt_bits = sample_width; |
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if ((pcm_formats == 0) && |
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(format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED))) { |
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/* some devices don't define this correctly... */ |
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usb_audio_info(chip, "%u:%d : format type 0 is detected, processed as PCM\n", |
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fp->iface, fp->altsetting); |
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format = 1 << UAC_FORMAT_TYPE_I_PCM; |
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} |
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if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) { |
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if (((chip->usb_id == USB_ID(0x0582, 0x0016)) || |
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/* Edirol SD-90 */ |
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(chip->usb_id == USB_ID(0x0582, 0x000c))) && |
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/* Roland SC-D70 */ |
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sample_width == 24 && sample_bytes == 2) |
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sample_bytes = 3; |
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else if (sample_width > sample_bytes * 8) { |
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usb_audio_info(chip, "%u:%d : sample bitwidth %d in over sample bytes %d\n", |
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fp->iface, fp->altsetting, |
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sample_width, sample_bytes); |
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} |
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/* check the format byte size */ |
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switch (sample_bytes) { |
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case 1: |
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pcm_formats |= SNDRV_PCM_FMTBIT_S8; |
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break; |
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case 2: |
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if (snd_usb_is_big_endian_format(chip, fp)) |
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pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */ |
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else |
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pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE; |
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break; |
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case 3: |
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if (snd_usb_is_big_endian_format(chip, fp)) |
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pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */ |
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else |
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pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE; |
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break; |
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case 4: |
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pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE; |
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break; |
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default: |
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usb_audio_info(chip, |
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"%u:%d : unsupported sample bitwidth %d in %d bytes\n", |
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fp->iface, fp->altsetting, |
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sample_width, sample_bytes); |
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break; |
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} |
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} |
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if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) { |
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/* Dallas DS4201 workaround: it advertises U8 format, but really |
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supports S8. */ |
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if (chip->usb_id == USB_ID(0x04fa, 0x4201)) |
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pcm_formats |= SNDRV_PCM_FMTBIT_S8; |
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else |
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pcm_formats |= SNDRV_PCM_FMTBIT_U8; |
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} |
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if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) { |
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pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE; |
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} |
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if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) { |
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pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW; |
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} |
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if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) { |
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pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW; |
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} |
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if (format & ~0x3f) { |
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usb_audio_info(chip, |
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"%u:%d : unsupported format bits %#llx\n", |
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fp->iface, fp->altsetting, format); |
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} |
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pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes); |
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return pcm_formats; |
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} |
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static int set_fixed_rate(struct audioformat *fp, int rate, int rate_bits) |
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{ |
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kfree(fp->rate_table); |
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fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL); |
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if (!fp->rate_table) |
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return -ENOMEM; |
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fp->nr_rates = 1; |
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fp->rate_min = rate; |
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fp->rate_max = rate; |
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fp->rates = rate_bits; |
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fp->rate_table[0] = rate; |
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return 0; |
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} |
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/* set up rate_min, rate_max and rates from the rate table */ |
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static void set_rate_table_min_max(struct audioformat *fp) |
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{ |
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unsigned int rate; |
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int i; |
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fp->rate_min = INT_MAX; |
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fp->rate_max = 0; |
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fp->rates = 0; |
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for (i = 0; i < fp->nr_rates; i++) { |
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rate = fp->rate_table[i]; |
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fp->rate_min = min(fp->rate_min, rate); |
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fp->rate_max = max(fp->rate_max, rate); |
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fp->rates |= snd_pcm_rate_to_rate_bit(rate); |
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} |
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} |
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/* |
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* parse the format descriptor and stores the possible sample rates |
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* on the audioformat table (audio class v1). |
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* |
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* @dev: usb device |
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* @fp: audioformat record |
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* @fmt: the format descriptor |
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* @offset: the start offset of descriptor pointing the rate type |
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* (7 for type I and II, 8 for type II) |
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*/ |
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static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp, |
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unsigned char *fmt, int offset) |
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{ |
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int nr_rates = fmt[offset]; |
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if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) { |
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usb_audio_err(chip, |
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"%u:%d : invalid UAC_FORMAT_TYPE desc\n", |
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fp->iface, fp->altsetting); |
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return -EINVAL; |
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} |
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if (nr_rates) { |
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/* |
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* build the rate table and bitmap flags |
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*/ |
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int r, idx; |
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fp->rate_table = kmalloc_array(nr_rates, sizeof(int), |
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GFP_KERNEL); |
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if (fp->rate_table == NULL) |
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return -ENOMEM; |
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fp->nr_rates = 0; |
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for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) { |
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unsigned int rate = combine_triple(&fmt[idx]); |
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if (!rate) |
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continue; |
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/* C-Media CM6501 mislabels its 96 kHz altsetting */ |
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/* Terratec Aureon 7.1 USB C-Media 6206, too */ |
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if (rate == 48000 && nr_rates == 1 && |
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(chip->usb_id == USB_ID(0x0d8c, 0x0201) || |
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chip->usb_id == USB_ID(0x0d8c, 0x0102) || |
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chip->usb_id == USB_ID(0x0ccd, 0x00b1)) && |
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fp->altsetting == 5 && fp->maxpacksize == 392) |
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rate = 96000; |
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/* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */ |
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if (rate == 16000 && |
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(chip->usb_id == USB_ID(0x041e, 0x4064) || |
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chip->usb_id == USB_ID(0x041e, 0x4068))) |
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rate = 8000; |
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fp->rate_table[fp->nr_rates++] = rate; |
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} |
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if (!fp->nr_rates) { |
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usb_audio_info(chip, |
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"%u:%d: All rates were zero\n", |
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fp->iface, fp->altsetting); |
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return -EINVAL; |
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} |
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set_rate_table_min_max(fp); |
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} else { |
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/* continuous rates */ |
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fp->rates = SNDRV_PCM_RATE_CONTINUOUS; |
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fp->rate_min = combine_triple(&fmt[offset + 1]); |
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fp->rate_max = combine_triple(&fmt[offset + 4]); |
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} |
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/* Jabra Evolve 65 headset */ |
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if (chip->usb_id == USB_ID(0x0b0e, 0x030b)) { |
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/* only 48kHz for playback while keeping 16kHz for capture */ |
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if (fp->nr_rates != 1) |
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return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000); |
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} |
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return 0; |
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} |
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/* |
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* Presonus Studio 1810c supports a limited set of sampling |
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* rates per altsetting but reports the full set each time. |
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* If we don't filter out the unsupported rates and attempt |
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* to configure the card, it will hang refusing to do any |
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* further audio I/O until a hard reset is performed. |
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* |
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* The list of supported rates per altsetting (set of available |
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* I/O channels) is described in the owner's manual, section 2.2. |
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*/ |
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static bool s1810c_valid_sample_rate(struct audioformat *fp, |
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unsigned int rate) |
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{ |
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switch (fp->altsetting) { |
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case 1: |
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/* All ADAT ports available */ |
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return rate <= 48000; |
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case 2: |
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/* Half of ADAT ports available */ |
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return (rate == 88200 || rate == 96000); |
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case 3: |
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/* Analog I/O only (no S/PDIF nor ADAT) */ |
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return rate >= 176400; |
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default: |
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return false; |
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} |
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return false; |
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} |
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/* |
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* Many Focusrite devices supports a limited set of sampling rates per |
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* altsetting. Maximum rate is exposed in the last 4 bytes of Format Type |
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* descriptor which has a non-standard bLength = 10. |
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*/ |
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static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip, |
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struct audioformat *fp, |
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unsigned int rate) |
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{ |
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struct usb_interface *iface; |
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struct usb_host_interface *alts; |
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unsigned char *fmt; |
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unsigned int max_rate; |
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iface = usb_ifnum_to_if(chip->dev, fp->iface); |
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if (!iface) |
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return true; |
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alts = &iface->altsetting[fp->altset_idx]; |
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fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, |
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NULL, UAC_FORMAT_TYPE); |
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if (!fmt) |
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return true; |
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if (fmt[0] == 10) { /* bLength */ |
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max_rate = combine_quad(&fmt[6]); |
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/* Validate max rate */ |
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if (max_rate != 48000 && |
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max_rate != 96000 && |
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max_rate != 192000 && |
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max_rate != 384000) { |
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usb_audio_info(chip, |
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"%u:%d : unexpected max rate: %u\n", |
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fp->iface, fp->altsetting, max_rate); |
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return true; |
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} |
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return rate <= max_rate; |
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} |
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return true; |
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} |
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/* |
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* Helper function to walk the array of sample rate triplets reported by |
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* the device. The problem is that we need to parse whole array first to |
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* get to know how many sample rates we have to expect. |
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* Then fp->rate_table can be allocated and filled. |
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*/ |
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static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip, |
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struct audioformat *fp, int nr_triplets, |
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const unsigned char *data) |
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{ |
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int i, nr_rates = 0; |
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for (i = 0; i < nr_triplets; i++) { |
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int min = combine_quad(&data[2 + 12 * i]); |
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int max = combine_quad(&data[6 + 12 * i]); |
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int res = combine_quad(&data[10 + 12 * i]); |
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unsigned int rate; |
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if ((max < 0) || (min < 0) || (res < 0) || (max < min)) |
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continue; |
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/* |
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* for ranges with res == 1, we announce a continuous sample |
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* rate range, and this function should return 0 for no further |
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* parsing. |
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*/ |
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if (res == 1) { |
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fp->rate_min = min; |
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fp->rate_max = max; |
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fp->rates = SNDRV_PCM_RATE_CONTINUOUS; |
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return 0; |
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} |
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for (rate = min; rate <= max; rate += res) { |
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|
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/* Filter out invalid rates on Presonus Studio 1810c */ |
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if (chip->usb_id == USB_ID(0x0194f, 0x010c) && |
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!s1810c_valid_sample_rate(fp, rate)) |
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goto skip_rate; |
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|
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/* Filter out invalid rates on Focusrite devices */ |
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if (USB_ID_VENDOR(chip->usb_id) == 0x1235 && |
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!focusrite_valid_sample_rate(chip, fp, rate)) |
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goto skip_rate; |
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if (fp->rate_table) |
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fp->rate_table[nr_rates] = rate; |
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nr_rates++; |
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if (nr_rates >= MAX_NR_RATES) { |
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usb_audio_err(chip, "invalid uac2 rates\n"); |
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break; |
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} |
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skip_rate: |
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/* avoid endless loop */ |
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if (res == 0) |
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break; |
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} |
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} |
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return nr_rates; |
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} |
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|
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/* Line6 Helix series and the Rode Rodecaster Pro don't support the |
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* UAC2_CS_RANGE usb function call. Return a static table of known |
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* clock rates. |
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*/ |
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static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip, |
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struct audioformat *fp) |
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{ |
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switch (chip->usb_id) { |
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case USB_ID(0x0e41, 0x4241): /* Line6 Helix */ |
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case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */ |
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case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */ |
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case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */ |
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case USB_ID(0x0e41, 0x4247): /* Line6 Pod Go */ |
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case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */ |
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case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */ |
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case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */ |
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case USB_ID(0x19f7, 0x0011): /* Rode Rodecaster Pro */ |
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return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000); |
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} |
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return -ENODEV; |
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} |
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/* check whether the given altsetting is supported for the already set rate */ |
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static bool check_valid_altsetting_v2v3(struct snd_usb_audio *chip, int iface, |
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int altsetting) |
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{ |
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struct usb_device *dev = chip->dev; |
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__le64 raw_data = 0; |
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u64 data; |
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int err; |
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/* we assume 64bit is enough for any altsettings */ |
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if (snd_BUG_ON(altsetting >= 64 - 8)) |
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return false; |
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err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR, |
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USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, |
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UAC2_AS_VAL_ALT_SETTINGS << 8, |
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iface, &raw_data, sizeof(raw_data)); |
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if (err < 0) |
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return false; |
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data = le64_to_cpu(raw_data); |
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/* first byte contains the bitmap size */ |
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if ((data & 0xff) * 8 < altsetting) |
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return false; |
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if (data & (1ULL << (altsetting + 8))) |
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return true; |
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|
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return false; |
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} |
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|
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/* |
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* Validate each sample rate with the altsetting |
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* Rebuild the rate table if only partial values are valid |
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*/ |
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static int validate_sample_rate_table_v2v3(struct snd_usb_audio *chip, |
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struct audioformat *fp, |
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int clock) |
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{ |
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struct usb_device *dev = chip->dev; |
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unsigned int *table; |
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unsigned int nr_rates; |
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int i, err; |
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|
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/* performing the rate verification may lead to unexpected USB bus |
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* behavior afterwards by some unknown reason. Do this only for the |
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* known devices. |
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*/ |
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switch (USB_ID_VENDOR(chip->usb_id)) { |
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case 0x07fd: /* MOTU */ |
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break; |
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default: |
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return 0; /* don't perform the validation as default */ |
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} |
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|
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table = kcalloc(fp->nr_rates, sizeof(*table), GFP_KERNEL); |
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if (!table) |
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return -ENOMEM; |
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|
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/* clear the interface altsetting at first */ |
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usb_set_interface(dev, fp->iface, 0); |
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|
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nr_rates = 0; |
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for (i = 0; i < fp->nr_rates; i++) { |
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err = snd_usb_set_sample_rate_v2v3(chip, fp, clock, |
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fp->rate_table[i]); |
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if (err < 0) |
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continue; |
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|
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if (check_valid_altsetting_v2v3(chip, fp->iface, fp->altsetting)) |
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table[nr_rates++] = fp->rate_table[i]; |
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} |
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|
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if (!nr_rates) { |
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usb_audio_dbg(chip, |
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"No valid sample rate available for %d:%d, assuming a firmware bug\n", |
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fp->iface, fp->altsetting); |
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nr_rates = fp->nr_rates; /* continue as is */ |
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} |
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|
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if (fp->nr_rates == nr_rates) { |
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kfree(table); |
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return 0; |
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} |
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|
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kfree(fp->rate_table); |
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fp->rate_table = table; |
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fp->nr_rates = nr_rates; |
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return 0; |
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} |
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|
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/* |
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* parse the format descriptor and stores the possible sample rates |
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* on the audioformat table (audio class v2 and v3). |
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*/ |
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static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip, |
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struct audioformat *fp) |
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{ |
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struct usb_device *dev = chip->dev; |
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unsigned char tmp[2], *data; |
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int nr_triplets, data_size, ret = 0, ret_l6; |
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int clock = snd_usb_clock_find_source(chip, fp, false); |
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|
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if (clock < 0) { |
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dev_err(&dev->dev, |
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"%s(): unable to find clock source (clock %d)\n", |
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__func__, clock); |
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goto err; |
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} |
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|
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/* get the number of sample rates first by only fetching 2 bytes */ |
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ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE, |
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USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, |
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UAC2_CS_CONTROL_SAM_FREQ << 8, |
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snd_usb_ctrl_intf(chip) | (clock << 8), |
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tmp, sizeof(tmp)); |
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|
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if (ret < 0) { |
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/* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */ |
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ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp); |
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if (ret_l6 == -ENODEV) { |
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/* no line6 device found continue showing the error */ |
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dev_err(&dev->dev, |
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"%s(): unable to retrieve number of sample rates (clock %d)\n", |
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__func__, clock); |
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goto err; |
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} |
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if (ret_l6 == 0) { |
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dev_info(&dev->dev, |
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"%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; |
|
}
|
|
|