| // 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) { |
| usb_audio_info(chip, |
| "%u:%d: invalid format type 0x%llx is detected, processed as PCM\n", |
| fp->iface, fp->altsetting, format); |
| format = UAC_FORMAT_TYPE_I_PCM; |
| } |
| 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 == BIT(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 = BIT(UAC_FORMAT_TYPE_I_PCM); |
| } |
| if (format & BIT(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 & BIT(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 & BIT(UAC_FORMAT_TYPE_I_IEEE_FLOAT)) |
| pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE; |
| if (format & BIT(UAC_FORMAT_TYPE_I_ALAW)) |
| pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW; |
| if (format & BIT(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(0x194f, 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(0x0e41, 0x424b): /* Line6 Pod Go */ |
| 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; |
| struct usb_host_interface *alts; |
| unsigned int *table; |
| unsigned int nr_rates; |
| int i, err; |
| u32 bmControls; |
| |
| /* 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 */ |
| |
| alts = snd_usb_get_host_interface(chip, fp->iface, fp->altsetting); |
| if (!alts) |
| return 0; |
| |
| if (fp->protocol == UAC_VERSION_3) { |
| struct uac3_as_header_descriptor *as = snd_usb_find_csint_desc( |
| alts->extra, alts->extralen, NULL, UAC_AS_GENERAL); |
| bmControls = le32_to_cpu(as->bmControls); |
| } else { |
| struct uac2_as_header_descriptor *as = snd_usb_find_csint_desc( |
| alts->extra, alts->extralen, NULL, UAC_AS_GENERAL); |
| bmControls = as->bmControls; |
| } |
| |
| if (!uac_v2v3_control_is_readable(bmControls, |
| UAC2_AS_VAL_ALT_SETTINGS)) |
| return 0; |
| |
| 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; |
| } |