[linux-2.6-block.git] / sound / usb / format.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 "debug.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;
		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;
}


/*
 * 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;
		fp->rate_min = fp->rate_max = 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->rate_min || rate < fp->rate_min)
				fp->rate_min = rate;
			if (!fp->rate_max || rate > fp->rate_max)
				fp->rate_max = rate;
			fp->rates |= snd_pcm_rate_to_rate_bit(rate);
			fp->nr_rates++;
		}
		if (!fp->nr_rates) {
			hwc_debug("All rates were zero. Skipping format!\n");
			return -EINVAL;
		}
	} 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]);
	}
	return 0;
}

/*
 * 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;

	fp->rates = fp->rate_min = fp->rate_max = 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) {
			if (fp->rate_table)
				fp->rate_table[nr_rates] = rate;
			if (!fp->rate_min || rate < fp->rate_min)
				fp->rate_min = rate;
			if (!fp->rate_max || rate > fp->rate_max)
				fp->rate_max = rate;
			fp->rates |= snd_pcm_rate_to_rate_bit(rate);

			nr_rates++;
			if (nr_rates >= MAX_NR_RATES) {
				usb_audio_err(chip, "invalid uac2 rates\n");
				break;
			}

			/* avoid endless loop */
			if (res == 0)
				break;
		}
	}

	return nr_rates;
}

/* Line6 Helix series 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 */
		/* supported rates: 48Khz */
		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 = 48000;
		fp->rate_max = 48000;
		fp->rates = SNDRV_PCM_RATE_48000;
		fp->rate_table[0] = 48000;
		return 0;
	}

	return -ENODEV;
}

/*
 * 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->protocol,
					      fp->clock, 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);

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;
}
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
e5779998	2	/*
e5779998 DM	3	*/
	4
	5	#include <linux/init.h>
36db0456	6	#include <linux/slab.h>
e5779998 DM	7	#include <linux/usb.h>
e5779998 DM	8	#include <linux/usb/audio.h>
7e847894	9	#include <linux/usb/audio-v2.h>
9a2fe9b8	10	#include <linux/usb/audio-v3.h>
e5779998 DM	11
	12	#include <sound/core.h>
	13	#include <sound/pcm.h>
	14
	15	#include "usbaudio.h"
	16	#include "card.h"
	17	#include "quirks.h"
	18	#include "helper.h"
	19	#include "debug.h"
79f920fb	20	#include "clock.h"
ee95cb61	21	#include "format.h"
e5779998 DM	22
	23	/*
	24	* parse the audio format type I descriptor
	25	* and returns the corresponding pcm format
	26	*
	27	* @dev: usb device
	28	* @fp: audioformat record
	29	* @format: the format tag (wFormatTag)
9a2fe9b8	30	* @fmt: the format type descriptor (v1/v2) or AudioStreaming descriptor (v3)
e5779998	31	*/
29088fef	32	static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
e5779998	33	struct audioformat *fp,
9a2fe9b8	34	u64 format, void *_fmt)
e5779998	35	{
e5779998	36	int sample_width, sample_bytes;
717bfb5f	37	u64 pcm_formats = 0;
e5779998	38
8f898e92	39	switch (fp->protocol) {
a2acad82 CL	40	case UAC_VERSION_1:
a2acad82 CL	41	default: {
e5779998 DM	42	struct uac_format_type_i_discrete_descriptor *fmt = _fmt;
	43	sample_width = fmt->bBitResolution;
	44	sample_bytes = fmt->bSubframeSize;
b44d419b	45	format = 1ULL << format;
e5779998 DM	46	break;
	47	}
	48
	49	case UAC_VERSION_2: {
	50	struct uac_format_type_i_ext_descriptor *fmt = _fmt;
	51	sample_width = fmt->bBitResolution;
	52	sample_bytes = fmt->bSubslotSize;
717bfb5f	53
3a572d94	54	if (format & UAC2_FORMAT_TYPE_I_RAW_DATA) {
717bfb5f	55	pcm_formats \|= SNDRV_PCM_FMTBIT_SPECIAL;
3a572d94 JL	56	/* flag potentially raw DSD capable altsettings */
	57	fp->dsd_raw = true;
	58	}
717bfb5f	59
29088fef	60	format <<= 1;
e5779998 DM	61	break;
e5779998 DM	62	}
9a2fe9b8 RB	63	case UAC_VERSION_3: {
	64	struct uac3_as_header_descriptor *as = _fmt;
	65
	66	sample_width = as->bBitResolution;
	67	sample_bytes = as->bSubslotSize;
	68
	69	if (format & UAC3_FORMAT_TYPE_I_RAW_DATA)
	70	pcm_formats \|= SNDRV_PCM_FMTBIT_SPECIAL;
	71
	72	format <<= 1;
	73	break;
	74	}
e5779998 DM	75	}
e5779998 DM	76
c7a13264 JL	77	fp->fmt_bits = sample_width;
c7a13264 JL	78
717bfb5f DM	79	if ((pcm_formats == 0) &&
717bfb5f DM	80	(format == 0 \|\| format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED))) {
29088fef	81	/* some devices don't define this correctly... */
0ba41d91 TI	82	usb_audio_info(chip, "%u:%d : format type 0 is detected, processed as PCM\n",
0ba41d91 TI	83	fp->iface, fp->altsetting);
29088fef CL	84	format = 1 << UAC_FORMAT_TYPE_I_PCM;
	85	}
	86	if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) {
6d1f2f60 TH	87	if (((chip->usb_id == USB_ID(0x0582, 0x0016)) \|\|
	88	/* Edirol SD-90 */
	89	(chip->usb_id == USB_ID(0x0582, 0x000c))) &&
	90	/* Roland SC-D70 */
061b869e CL	91	sample_width == 24 && sample_bytes == 2)
	92	sample_bytes = 3;
	93	else if (sample_width > sample_bytes * 8) {
0ba41d91 TI	94	usb_audio_info(chip, "%u:%d : sample bitwidth %d in over sample bytes %d\n",
	95	fp->iface, fp->altsetting,
	96	sample_width, sample_bytes);
e5779998 DM	97	}
	98	/* check the format byte size */
	99	switch (sample_bytes) {
	100	case 1:
29088fef	101	pcm_formats \|= SNDRV_PCM_FMTBIT_S8;
e5779998 DM	102	break;
	103	case 2:
	104	if (snd_usb_is_big_endian_format(chip, fp))
29088fef	105	pcm_formats \|= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */
e5779998	106	else
29088fef	107	pcm_formats \|= SNDRV_PCM_FMTBIT_S16_LE;
e5779998 DM	108	break;
	109	case 3:
	110	if (snd_usb_is_big_endian_format(chip, fp))
29088fef	111	pcm_formats \|= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */
e5779998	112	else
29088fef	113	pcm_formats \|= SNDRV_PCM_FMTBIT_S24_3LE;
e5779998 DM	114	break;
e5779998 DM	115	case 4:
29088fef	116	pcm_formats \|= SNDRV_PCM_FMTBIT_S32_LE;
e5779998 DM	117	break;
e5779998 DM	118	default:
0ba41d91 TI	119	usb_audio_info(chip,
	120	"%u:%d : unsupported sample bitwidth %d in %d bytes\n",
	121	fp->iface, fp->altsetting,
	122	sample_width, sample_bytes);
e5779998 DM	123	break;
e5779998 DM	124	}
29088fef CL	125	}
29088fef CL	126	if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) {
e5779998 DM	127	/* Dallas DS4201 workaround: it advertises U8 format, but really
	128	supports S8. */
	129	if (chip->usb_id == USB_ID(0x04fa, 0x4201))
29088fef CL	130	pcm_formats \|= SNDRV_PCM_FMTBIT_S8;
	131	else
	132	pcm_formats \|= SNDRV_PCM_FMTBIT_U8;
	133	}
	134	if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) {
	135	pcm_formats \|= SNDRV_PCM_FMTBIT_FLOAT_LE;
	136	}
	137	if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) {
	138	pcm_formats \|= SNDRV_PCM_FMTBIT_A_LAW;
	139	}
	140	if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) {
	141	pcm_formats \|= SNDRV_PCM_FMTBIT_MU_LAW;
	142	}
	143	if (format & ~0x3f) {
0ba41d91	144	usb_audio_info(chip,
9a2fe9b8	145	"%u:%d : unsupported format bits %#llx\n",
0ba41d91	146	fp->iface, fp->altsetting, format);
e5779998	147	}
126825e7 DM	148
	149	pcm_formats \|= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes);
	150
29088fef	151	return pcm_formats;
e5779998 DM	152	}
	153
	154
	155	/*
	156	* parse the format descriptor and stores the possible sample rates
	157	* on the audioformat table (audio class v1).
	158	*
	159	* @dev: usb device
	160	* @fp: audioformat record
	161	* @fmt: the format descriptor
	162	* @offset: the start offset of descriptor pointing the rate type
	163	* (7 for type I and II, 8 for type II)
	164	*/
	165	static int parse_audio_format_rates_v1(struct snd_usb_audio chip, struct audioformat fp,
	166	unsigned char *fmt, int offset)
	167	{
	168	int nr_rates = fmt[offset];
	169
	170	if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
0ba41d91 TI	171	usb_audio_err(chip,
	172	"%u:%d : invalid UAC_FORMAT_TYPE desc\n",
	173	fp->iface, fp->altsetting);
8ad10dc6	174	return -EINVAL;
e5779998 DM	175	}
	176
	177	if (nr_rates) {
	178	/*
	179	* build the rate table and bitmap flags
	180	*/
	181	int r, idx;
	182
6da2ec56 KC	183	fp->rate_table = kmalloc_array(nr_rates, sizeof(int),
6da2ec56 KC	184	GFP_KERNEL);
1bc00f32	185	if (fp->rate_table == NULL)
8ad10dc6	186	return -ENOMEM;
e5779998 DM	187
	188	fp->nr_rates = 0;
	189	fp->rate_min = fp->rate_max = 0;
	190	for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
	191	unsigned int rate = combine_triple(&fmt[idx]);
	192	if (!rate)
	193	continue;
	194	/* C-Media CM6501 mislabels its 96 kHz altsetting */
8129e79e	195	/* Terratec Aureon 7.1 USB C-Media 6206, too */
e5779998 DM	196	if (rate == 48000 && nr_rates == 1 &&
e5779998 DM	197	(chip->usb_id == USB_ID(0x0d8c, 0x0201) \|\|
8129e79e WB	198	chip->usb_id == USB_ID(0x0d8c, 0x0102) \|\|
8129e79e WB	199	chip->usb_id == USB_ID(0x0ccd, 0x00b1)) &&
e5779998 DM	200	fp->altsetting == 5 && fp->maxpacksize == 392)
e5779998 DM	201	rate = 96000;
8c4b79cf PH	202	/* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */
	203	if (rate == 16000 &&
	204	(chip->usb_id == USB_ID(0x041e, 0x4064) \|\|
	205	chip->usb_id == USB_ID(0x041e, 0x4068)))
e5779998 DM	206	rate = 8000;
	207
	208	fp->rate_table[fp->nr_rates] = rate;
	209	if (!fp->rate_min \|\| rate < fp->rate_min)
	210	fp->rate_min = rate;
	211	if (!fp->rate_max \|\| rate > fp->rate_max)
	212	fp->rate_max = rate;
	213	fp->rates \|= snd_pcm_rate_to_rate_bit(rate);
	214	fp->nr_rates++;
	215	}
	216	if (!fp->nr_rates) {
	217	hwc_debug("All rates were zero. Skipping format!\n");
8ad10dc6	218	return -EINVAL;
e5779998 DM	219	}
	220	} else {
	221	/* continuous rates */
	222	fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
	223	fp->rate_min = combine_triple(&fmt[offset + 1]);
	224	fp->rate_max = combine_triple(&fmt[offset + 4]);
	225	}
	226	return 0;
	227	}
	228
67c10366 DM	229	/*
	230	* Helper function to walk the array of sample rate triplets reported by
	231	* the device. The problem is that we need to parse whole array first to
	232	* get to know how many sample rates we have to expect.
	233	* Then fp->rate_table can be allocated and filled.
	234	*/
0ba41d91 TI	235	static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
0ba41d91 TI	236	struct audioformat *fp, int nr_triplets,
67c10366 DM	237	const unsigned char *data)
	238	{
	239	int i, nr_rates = 0;
	240
	241	fp->rates = fp->rate_min = fp->rate_max = 0;
	242
	243	for (i = 0; i < nr_triplets; i++) {
	244	int min = combine_quad(&data[2 + 12 * i]);
	245	int max = combine_quad(&data[6 + 12 * i]);
	246	int res = combine_quad(&data[10 + 12 * i]);
4fa0e81b	247	unsigned int rate;
67c10366 DM	248
	249	if ((max < 0) \|\| (min < 0) \|\| (res < 0) \|\| (max < min))
	250	continue;
	251
	252	/*
	253	* for ranges with res == 1, we announce a continuous sample
	254	* rate range, and this function should return 0 for no further
	255	* parsing.
	256	*/
	257	if (res == 1) {
	258	fp->rate_min = min;
	259	fp->rate_max = max;
	260	fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
	261	return 0;
	262	}
	263
	264	for (rate = min; rate <= max; rate += res) {
	265	if (fp->rate_table)
	266	fp->rate_table[nr_rates] = rate;
	267	if (!fp->rate_min \|\| rate < fp->rate_min)
	268	fp->rate_min = rate;
	269	if (!fp->rate_max \|\| rate > fp->rate_max)
	270	fp->rate_max = rate;
	271	fp->rates \|= snd_pcm_rate_to_rate_bit(rate);
	272
	273	nr_rates++;
8866f405	274	if (nr_rates >= MAX_NR_RATES) {
0ba41d91	275	usb_audio_err(chip, "invalid uac2 rates\n");
4fa0e81b XW	276	break;
4fa0e81b XW	277	}
67c10366 DM	278
	279	/* avoid endless loop */
	280	if (res == 0)
	281	break;
	282	}
	283	}
	284
	285	return nr_rates;
	286	}
	287
d4bd3053 NL	288	/* Line6 Helix series don't support the UAC2_CS_RANGE usb function
	289	* call. Return a static table of known clock rates.
	290	*/
	291	static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip,
	292	struct audioformat *fp)
	293	{
	294	switch (chip->usb_id) {
	295	case USB_ID(0x0E41, 0x4241): /* Line6 Helix */
	296	case USB_ID(0x0E41, 0x4242): /* Line6 Helix Rack */
	297	case USB_ID(0x0E41, 0x4244): /* Line6 Helix LT */
	298	case USB_ID(0x0E41, 0x4246): /* Line6 HX-Stomp */
	299	/* supported rates: 48Khz */
	300	kfree(fp->rate_table);
	301	fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL);
	302	if (!fp->rate_table)
	303	return -ENOMEM;
	304	fp->nr_rates = 1;
	305	fp->rate_min = 48000;
	306	fp->rate_max = 48000;
	307	fp->rates = SNDRV_PCM_RATE_48000;
	308	fp->rate_table[0] = 48000;
	309	return 0;
	310	}
	311
	312	return -ENODEV;
	313	}
	314
e5779998 DM	315	/*
e5779998 DM	316	* parse the format descriptor and stores the possible sample rates
9a2fe9b8	317	* on the audioformat table (audio class v2 and v3).
e5779998	318	*/
9a2fe9b8	319	static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
3d8d4dcf	320	struct audioformat *fp)
e5779998 DM	321	{
	322	struct usb_device *dev = chip->dev;
	323	unsigned char tmp[2], *data;
d4bd3053	324	int nr_triplets, data_size, ret = 0, ret_l6;
9a2fe9b8 RB	325	int clock = snd_usb_clock_find_source(chip, fp->protocol,
9a2fe9b8 RB	326	fp->clock, false);
e5779998	327
d07140ba	328	if (clock < 0) {
0ba41d91 TI	329	dev_err(&dev->dev,
0ba41d91 TI	330	"%s(): unable to find clock source (clock %d)\n",
d07140ba DM	331	__func__, clock);
	332	goto err;
	333	}
	334
e5779998 DM	335	/* get the number of sample rates first by only fetching 2 bytes */
	336	ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
	337	USB_TYPE_CLASS \| USB_RECIP_INTERFACE \| USB_DIR_IN,
11bcbc44 DM	338	UAC2_CS_CONTROL_SAM_FREQ << 8,
11bcbc44 DM	339	snd_usb_ctrl_intf(chip) \| (clock << 8),
17d900c4	340	tmp, sizeof(tmp));
e5779998 DM	341
e5779998 DM	342	if (ret < 0) {
d4bd3053 NL	343	/* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */
	344	ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);
	345	if (ret_l6 == -ENODEV) {
	346	/* no line6 device found continue showing the error */
	347	dev_err(&dev->dev,
	348	"%s(): unable to retrieve number of sample rates (clock %d)\n",
	349	__func__, clock);
	350	goto err;
	351	}
	352	if (ret_l6 == 0) {
	353	dev_info(&dev->dev,
	354	"%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",
79f920fb	355	__func__, clock);
d4bd3053 NL	356	return 0;
	357	}
	358	ret = ret_l6;
e5779998 DM	359	goto err;
	360	}
	361
67c10366 DM	362	nr_triplets = (tmp[1] << 8) \| tmp[0];
67c10366 DM	363	data_size = 2 + 12 * nr_triplets;
e5779998 DM	364	data = kzalloc(data_size, GFP_KERNEL);
	365	if (!data) {
	366	ret = -ENOMEM;
	367	goto err;
	368	}
	369
	370	/* now get the full information */
	371	ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
79f920fb	372	USB_TYPE_CLASS \| USB_RECIP_INTERFACE \| USB_DIR_IN,
11bcbc44 DM	373	UAC2_CS_CONTROL_SAM_FREQ << 8,
11bcbc44 DM	374	snd_usb_ctrl_intf(chip) \| (clock << 8),
17d900c4	375	data, data_size);
e5779998 DM	376
e5779998 DM	377	if (ret < 0) {
0ba41d91 TI	378	dev_err(&dev->dev,
0ba41d91 TI	379	"%s(): unable to retrieve sample rate range (clock %d)\n",
79f920fb	380	__func__, clock);
e5779998 DM	381	ret = -EINVAL;
	382	goto err_free;
	383	}
	384
67c10366 DM	385	/* Call the triplet parser, and make sure fp->rate_table is NULL.
	386	* We just use the return value to know how many sample rates we
	387	* will have to deal with. */
	388	kfree(fp->rate_table);
	389	fp->rate_table = NULL;
0ba41d91	390	fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
67c10366 DM	391
	392	if (fp->nr_rates == 0) {
	393	/* SNDRV_PCM_RATE_CONTINUOUS */
	394	ret = 0;
	395	goto err_free;
	396	}
	397
6da2ec56	398	fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL);
e5779998 DM	399	if (!fp->rate_table) {
	400	ret = -ENOMEM;
	401	goto err_free;
	402	}
	403
67c10366 DM	404	/* Call the triplet parser again, but this time, fp->rate_table is
67c10366 DM	405	* allocated, so the rates will be stored */
0ba41d91	406	parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
e5779998 DM	407
	408	err_free:
	409	kfree(data);
	410	err:
	411	return ret;
	412	}
	413
	414	/*
	415	* parse the format type I and III descriptors
	416	*/
	417	static int parse_audio_format_i(struct snd_usb_audio *chip,
9a2fe9b8 RB	418	struct audioformat *fp, u64 format,
9a2fe9b8 RB	419	void *_fmt)
e5779998	420	{
74c34ca1	421	snd_pcm_format_t pcm_format;
9a2fe9b8	422	unsigned int fmt_type;
74c34ca1	423	int ret;
e5779998	424
9a2fe9b8 RB	425	switch (fp->protocol) {
	426	default:
	427	case UAC_VERSION_1:
	428	case UAC_VERSION_2: {
	429	struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
	430
	431	fmt_type = fmt->bFormatType;
	432	break;
	433	}
	434	case UAC_VERSION_3: {
	435	/* fp->fmt_type is already set in this case */
	436	fmt_type = fp->fmt_type;
	437	break;
	438	}
	439	}
	440
	441	if (fmt_type == UAC_FORMAT_TYPE_III) {
e5779998 DM	442	/* FIXME: the format type is really IECxxx
	443	* but we give normal PCM format to get the existing
	444	* apps working...
	445	*/
	446	switch (chip->usb_id) {
	447
	448	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
	449	if (chip->setup == 0x00 &&
	450	fp->altsetting == 6)
	451	pcm_format = SNDRV_PCM_FORMAT_S16_BE;
	452	else
	453	pcm_format = SNDRV_PCM_FORMAT_S16_LE;
	454	break;
	455	default:
	456	pcm_format = SNDRV_PCM_FORMAT_S16_LE;
	457	}
74c34ca1	458	fp->formats = pcm_format_to_bits(pcm_format);
e5779998	459	} else {
9a2fe9b8	460	fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
29088fef	461	if (!fp->formats)
8ad10dc6	462	return -EINVAL;
e5779998 DM	463	}
e5779998 DM	464
e5779998 DM	465	/* gather possible sample rates */
	466	/* audio class v1 reports possible sample rates as part of the
	467	* proprietary class specific descriptor.
	468	* audio class v2 uses class specific EP0 range requests for that.
	469	*/
8f898e92	470	switch (fp->protocol) {
a2acad82	471	default:
9a2fe9b8 RB	472	case UAC_VERSION_1: {
	473	struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
	474
e5779998	475	fp->channels = fmt->bNrChannels;
74754f97	476	ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
e5779998	477	break;
9a2fe9b8	478	}
e5779998	479	case UAC_VERSION_2:
9a2fe9b8	480	case UAC_VERSION_3: {
e5779998	481	/* fp->channels is already set in this case */
9a2fe9b8	482	ret = parse_audio_format_rates_v2v3(chip, fp);
e5779998 DM	483	break;
e5779998 DM	484	}
9a2fe9b8	485	}
e5779998 DM	486
e5779998 DM	487	if (fp->channels < 1) {
0ba41d91 TI	488	usb_audio_err(chip,
	489	"%u:%d : invalid channels %d\n",
	490	fp->iface, fp->altsetting, fp->channels);
8ad10dc6	491	return -EINVAL;
e5779998 DM	492	}
	493
	494	return ret;
	495	}
	496
	497	/*
	498	* parse the format type II descriptor
	499	*/
	500	static int parse_audio_format_ii(struct snd_usb_audio *chip,
	501	struct audioformat *fp,
9a2fe9b8	502	u64 format, void *_fmt)
e5779998 DM	503	{
e5779998 DM	504	int brate, framesize, ret;
e5779998 DM	505
	506	switch (format) {
	507	case UAC_FORMAT_TYPE_II_AC3:
	508	/* FIXME: there is no AC3 format defined yet */
015eb0b0 CL	509	// fp->formats = SNDRV_PCM_FMTBIT_AC3;
015eb0b0 CL	510	fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
e5779998 DM	511	break;
e5779998 DM	512	case UAC_FORMAT_TYPE_II_MPEG:
015eb0b0	513	fp->formats = SNDRV_PCM_FMTBIT_MPEG;
e5779998 DM	514	break;
e5779998 DM	515	default:
0ba41d91	516	usb_audio_info(chip,
9a2fe9b8	517	"%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n",
0ba41d91	518	fp->iface, fp->altsetting, format);
015eb0b0	519	fp->formats = SNDRV_PCM_FMTBIT_MPEG;
e5779998 DM	520	break;
	521	}
	522
	523	fp->channels = 1;
	524
8f898e92	525	switch (fp->protocol) {
a2acad82	526	default:
e5779998 DM	527	case UAC_VERSION_1: {
	528	struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
	529	brate = le16_to_cpu(fmt->wMaxBitRate);
	530	framesize = le16_to_cpu(fmt->wSamplesPerFrame);
0ba41d91	531	usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
e5779998 DM	532	fp->frame_size = framesize;
	533	ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
	534	break;
	535	}
	536	case UAC_VERSION_2: {
	537	struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
	538	brate = le16_to_cpu(fmt->wMaxBitRate);
	539	framesize = le16_to_cpu(fmt->wSamplesPerFrame);
0ba41d91	540	usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
e5779998	541	fp->frame_size = framesize;
9a2fe9b8	542	ret = parse_audio_format_rates_v2v3(chip, fp);
e5779998 DM	543	break;
	544	}
	545	}
	546
	547	return ret;
	548	}
	549
2fcdb06d	550	int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
9a2fe9b8	551	struct audioformat *fp, u64 format,
2fcdb06d	552	struct uac_format_type_i_continuous_descriptor *fmt,
8f898e92	553	int stream)
e5779998 DM	554	{
	555	int err;
	556
74754f97	557	switch (fmt->bFormatType) {
e5779998 DM	558	case UAC_FORMAT_TYPE_I:
e5779998 DM	559	case UAC_FORMAT_TYPE_III:
8f898e92	560	err = parse_audio_format_i(chip, fp, format, fmt);
e5779998 DM	561	break;
e5779998 DM	562	case UAC_FORMAT_TYPE_II:
8f898e92	563	err = parse_audio_format_ii(chip, fp, format, fmt);
e5779998 DM	564	break;
e5779998 DM	565	default:
0ba41d91 TI	566	usb_audio_info(chip,
	567	"%u:%d : format type %d is not supported yet\n",
	568	fp->iface, fp->altsetting,
	569	fmt->bFormatType);
8d091242	570	return -ENOTSUPP;
e5779998	571	}
74754f97	572	fp->fmt_type = fmt->bFormatType;
e5779998 DM	573	if (err < 0)
	574	return err;
	575	#if 1
	576	/* FIXME: temporary hack for extigy/audigy 2 nx/zs */
	577	/* extigy apparently supports sample rates other than 48k
	578	* but not in ordinary way. so we enable only 48k atm.
	579	*/
	580	if (chip->usb_id == USB_ID(0x041e, 0x3000) \|\|
	581	chip->usb_id == USB_ID(0x041e, 0x3020) \|\|
	582	chip->usb_id == USB_ID(0x041e, 0x3061)) {
74754f97	583	if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
e5779998 DM	584	fp->rates != SNDRV_PCM_RATE_48000 &&
e5779998 DM	585	fp->rates != SNDRV_PCM_RATE_96000)
8d091242	586	return -ENOTSUPP;
e5779998 DM	587	}
	588	#endif
	589	return 0;
	590	}
	591
9a2fe9b8 RB	592	int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
	593	struct audioformat *fp,
	594	struct uac3_as_header_descriptor *as,
	595	int stream)
	596	{
	597	u64 format = le64_to_cpu(as->bmFormats);
	598	int err;
	599
	600	/*
	601	* Type I format bits are D0..D6
	602	* This test works because type IV is not supported
	603	*/
	604	if (format & 0x7f)
	605	fp->fmt_type = UAC_FORMAT_TYPE_I;
	606	else
	607	fp->fmt_type = UAC_FORMAT_TYPE_III;
	608
	609	err = parse_audio_format_i(chip, fp, format, as);
	610	if (err < 0)
	611	return err;
	612
	613	return 0;
	614	}