hda_codec.c

linux 内核源代码

	ucontrol->value.iec958.status[3] = sbits >> 24;
	return 0;
}

static struct snd_kcontrol_new dig_in_ctls[] = {
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = SNDRV_CTL_NAME_IEC958("",CAPTURE,SWITCH),
		.info = snd_hda_spdif_in_switch_info,
		.get = snd_hda_spdif_in_switch_get,
		.put = snd_hda_spdif_in_switch_put,
	},
	{
		.access = SNDRV_CTL_ELEM_ACCESS_READ,
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
		.info = snd_hda_spdif_mask_info,
		.get = snd_hda_spdif_in_status_get,
	},
	{ } /* end */
};

/**
 * snd_hda_create_spdif_in_ctls - create Input SPDIF-related controls
 * @codec: the HDA codec
 * @nid: audio in widget NID
 *
 * Creates controls related with the SPDIF input.
 * Called from each patch supporting the SPDIF in.
 *
 * Returns 0 if successful, or a negative error code.
 */
int snd_hda_create_spdif_in_ctls(struct hda_codec *codec, hda_nid_t nid)
{
	int err;
	struct snd_kcontrol *kctl;
	struct snd_kcontrol_new *dig_mix;

	for (dig_mix = dig_in_ctls; dig_mix->name; dig_mix++) {
		kctl = snd_ctl_new1(dig_mix, codec);
		kctl->private_value = nid;
		err = snd_ctl_add(codec->bus->card, kctl);
		if (err < 0)
			return err;
	}
	codec->spdif_in_enable =
		snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_DIGI_CONVERT, 0) &
		AC_DIG1_ENABLE;
	return 0;
}

#ifdef SND_HDA_NEEDS_RESUME
/*
 * command cache
 */

/* build a 32bit cache key with the widget id and the command parameter */
#define build_cmd_cache_key(nid, verb)	((verb << 8) | nid)
#define get_cmd_cache_nid(key)		((key) & 0xff)
#define get_cmd_cache_cmd(key)		(((key) >> 8) & 0xffff)

/**
 * snd_hda_codec_write_cache - send a single command with caching
 * @codec: the HDA codec
 * @nid: NID to send the command
 * @direct: direct flag
 * @verb: the verb to send
 * @parm: the parameter for the verb
 *
 * Send a single command without waiting for response.
 *
 * Returns 0 if successful, or a negative error code.
 */
int snd_hda_codec_write_cache(struct hda_codec *codec, hda_nid_t nid,
			      int direct, unsigned int verb, unsigned int parm)
{
	int err;
	snd_hda_power_up(codec);
	mutex_lock(&codec->bus->cmd_mutex);
	err = codec->bus->ops.command(codec, nid, direct, verb, parm);
	if (!err) {
		struct hda_cache_head *c;
		u32 key = build_cmd_cache_key(nid, verb);
		c = get_alloc_hash(&codec->cmd_cache, key);
		if (c)
			c->val = parm;
	}
	mutex_unlock(&codec->bus->cmd_mutex);
	snd_hda_power_down(codec);
	return err;
}

/* resume the all commands from the cache */
void snd_hda_codec_resume_cache(struct hda_codec *codec)
{
	struct hda_cache_head *buffer = codec->cmd_cache.buffer;
	int i;

	for (i = 0; i < codec->cmd_cache.size; i++, buffer++) {
		u32 key = buffer->key;
		if (!key)
			continue;
		snd_hda_codec_write(codec, get_cmd_cache_nid(key), 0,
				    get_cmd_cache_cmd(key), buffer->val);
	}
}

/**
 * snd_hda_sequence_write_cache - sequence writes with caching
 * @codec: the HDA codec
 * @seq: VERB array to send
 *
 * Send the commands sequentially from the given array.
 * Thte commands are recorded on cache for power-save and resume.
 * The array must be terminated with NID=0.
 */
void snd_hda_sequence_write_cache(struct hda_codec *codec,
				  const struct hda_verb *seq)
{
	for (; seq->nid; seq++)
		snd_hda_codec_write_cache(codec, seq->nid, 0, seq->verb,
					  seq->param);
}
#endif /* SND_HDA_NEEDS_RESUME */

/*
 * set power state of the codec
 */
static void hda_set_power_state(struct hda_codec *codec, hda_nid_t fg,
				unsigned int power_state)
{
	hda_nid_t nid;
	int i;

	snd_hda_codec_write(codec, fg, 0, AC_VERB_SET_POWER_STATE,
			    power_state);

	nid = codec->start_nid;
	for (i = 0; i < codec->num_nodes; i++, nid++) {
		unsigned int wcaps = get_wcaps(codec, nid);
		if (wcaps & AC_WCAP_POWER) {
			unsigned int wid_type = (wcaps & AC_WCAP_TYPE) >>
				AC_WCAP_TYPE_SHIFT;
			if (wid_type == AC_WID_PIN) {
				unsigned int pincap;
				/*
				 * don't power down the widget if it controls
				 * eapd and EAPD_BTLENABLE is set.
				 */
				pincap = snd_hda_param_read(codec, nid,
							    AC_PAR_PIN_CAP);
				if (pincap & AC_PINCAP_EAPD) {
					int eapd = snd_hda_codec_read(codec,
						nid, 0,
						AC_VERB_GET_EAPD_BTLENABLE, 0);
					eapd &= 0x02;
					if (power_state == AC_PWRST_D3 && eapd)
						continue;
				}
			}
			snd_hda_codec_write(codec, nid, 0,
					    AC_VERB_SET_POWER_STATE,
					    power_state);
		}
	}

	if (power_state == AC_PWRST_D0) {
		unsigned long end_time;
		int state;
		msleep(10);
		/* wait until the codec reachs to D0 */
		end_time = jiffies + msecs_to_jiffies(500);
		do {
			state = snd_hda_codec_read(codec, fg, 0,
						   AC_VERB_GET_POWER_STATE, 0);
			if (state == power_state)
				break;
			msleep(1);
		} while (time_after_eq(end_time, jiffies));
	}
}

#ifdef SND_HDA_NEEDS_RESUME
/*
 * call suspend and power-down; used both from PM and power-save
 */
static void hda_call_codec_suspend(struct hda_codec *codec)
{
	if (codec->patch_ops.suspend)
		codec->patch_ops.suspend(codec, PMSG_SUSPEND);
	hda_set_power_state(codec,
			    codec->afg ? codec->afg : codec->mfg,
			    AC_PWRST_D3);
#ifdef CONFIG_SND_HDA_POWER_SAVE
	cancel_delayed_work(&codec->power_work);
	codec->power_on = 0;
	codec->power_transition = 0;
#endif
}

/*
 * kick up codec; used both from PM and power-save
 */
static void hda_call_codec_resume(struct hda_codec *codec)
{
	hda_set_power_state(codec,
			    codec->afg ? codec->afg : codec->mfg,
			    AC_PWRST_D0);
	if (codec->patch_ops.resume)
		codec->patch_ops.resume(codec);
	else {
		if (codec->patch_ops.init)
			codec->patch_ops.init(codec);
		snd_hda_codec_resume_amp(codec);
		snd_hda_codec_resume_cache(codec);
	}
}
#endif /* SND_HDA_NEEDS_RESUME */


/**
 * snd_hda_build_controls - build mixer controls
 * @bus: the BUS
 *
 * Creates mixer controls for each codec included in the bus.
 *
 * Returns 0 if successful, otherwise a negative error code.
 */
int __devinit snd_hda_build_controls(struct hda_bus *bus)
{
	struct hda_codec *codec;

	list_for_each_entry(codec, &bus->codec_list, list) {
		int err = 0;
		/* fake as if already powered-on */
		hda_keep_power_on(codec);
		/* then fire up */
		hda_set_power_state(codec,
				    codec->afg ? codec->afg : codec->mfg,
				    AC_PWRST_D0);
		/* continue to initialize... */
		if (codec->patch_ops.init)
			err = codec->patch_ops.init(codec);
		if (!err && codec->patch_ops.build_controls)
			err = codec->patch_ops.build_controls(codec);
		snd_hda_power_down(codec);
		if (err < 0)
			return err;
	}

	return 0;
}

/*
 * stream formats
 */
struct hda_rate_tbl {
	unsigned int hz;
	unsigned int alsa_bits;
	unsigned int hda_fmt;
};

static struct hda_rate_tbl rate_bits[] = {
	/* rate in Hz, ALSA rate bitmask, HDA format value */

	/* autodetected value used in snd_hda_query_supported_pcm */
	{ 8000, SNDRV_PCM_RATE_8000, 0x0500 }, /* 1/6 x 48 */
	{ 11025, SNDRV_PCM_RATE_11025, 0x4300 }, /* 1/4 x 44 */
	{ 16000, SNDRV_PCM_RATE_16000, 0x0200 }, /* 1/3 x 48 */
	{ 22050, SNDRV_PCM_RATE_22050, 0x4100 }, /* 1/2 x 44 */
	{ 32000, SNDRV_PCM_RATE_32000, 0x0a00 }, /* 2/3 x 48 */
	{ 44100, SNDRV_PCM_RATE_44100, 0x4000 }, /* 44 */
	{ 48000, SNDRV_PCM_RATE_48000, 0x0000 }, /* 48 */
	{ 88200, SNDRV_PCM_RATE_88200, 0x4800 }, /* 2 x 44 */
	{ 96000, SNDRV_PCM_RATE_96000, 0x0800 }, /* 2 x 48 */
	{ 176400, SNDRV_PCM_RATE_176400, 0x5800 },/* 4 x 44 */
	{ 192000, SNDRV_PCM_RATE_192000, 0x1800 }, /* 4 x 48 */
#define AC_PAR_PCM_RATE_BITS	11
	/* up to bits 10, 384kHZ isn't supported properly */

	/* not autodetected value */
	{ 9600, SNDRV_PCM_RATE_KNOT, 0x0400 }, /* 1/5 x 48 */

	{ 0 } /* terminator */
};

/**
 * snd_hda_calc_stream_format - calculate format bitset
 * @rate: the sample rate
 * @channels: the number of channels
 * @format: the PCM format (SNDRV_PCM_FORMAT_XXX)
 * @maxbps: the max. bps
 *
 * Calculate the format bitset from the given rate, channels and th PCM format.
 *
 * Return zero if invalid.
 */
unsigned int snd_hda_calc_stream_format(unsigned int rate,
					unsigned int channels,
					unsigned int format,
					unsigned int maxbps)
{
	int i;
	unsigned int val = 0;

	for (i = 0; rate_bits[i].hz; i++)
		if (rate_bits[i].hz == rate) {
			val = rate_bits[i].hda_fmt;
			break;
		}
	if (!rate_bits[i].hz) {
		snd_printdd("invalid rate %d\n", rate);
		return 0;
	}

	if (channels == 0 || channels > 8) {
		snd_printdd("invalid channels %d\n", channels);
		return 0;
	}
	val |= channels - 1;

	switch (snd_pcm_format_width(format)) {
	case 8:  val |= 0x00; break;
	case 16: val |= 0x10; break;
	case 20:
	case 24:
	case 32:
		if (maxbps >= 32)
			val |= 0x40;
		else if (maxbps >= 24)
			val |= 0x30;
		else
			val |= 0x20;
		break;
	default:
		snd_printdd("invalid format width %d\n",
			    snd_pcm_format_width(format));
		return 0;
	}

	return val;
}

/**
 * snd_hda_query_supported_pcm - query the supported PCM rates and formats
 * @codec: the HDA codec
 * @nid: NID to query
 * @ratesp: the pointer to store the detected rate bitflags
 * @formatsp: the pointer to store the detected formats
 * @bpsp: the pointer to store the detected format widths
 *
 * Queries the supported PCM rates and formats.  The NULL @ratesp, @formatsp
 * or @bsps argument is ignored.
 *
 * Returns 0 if successful, otherwise a negative error code.
 */
int snd_hda_query_supported_pcm(struct hda_codec *codec, hda_nid_t nid,
				u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
{
	int i;
	unsigned int val, streams;

	val = 0;
	if (nid != codec->afg &&
	    (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD)) {
		val = snd_hda_param_read(codec, nid, AC_PAR_PCM);
		if (val == -1)
			return -EIO;
	}
	if (!val)
		val = snd_hda_param_read(codec, codec->afg, AC_PAR_PCM);

	if (ratesp) {
		u32 rates = 0;
		for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) {
			if (val & (1 << i))
				rates |= rate_bits[i].alsa_bits;
		}
		*ratesp = rates;
	}

	if (formatsp || bpsp) {
		u64 formats = 0;
		unsigned int bps;
		unsigned int wcaps;

		wcaps = get_wcaps(codec, nid);
		streams = snd_hda_param_read(codec, nid, AC_PAR_STREAM);
		if (streams == -1)
			return -EIO;
		if (!streams) {
			streams = snd_hda_param_read(codec, codec->afg,
						     AC_PAR_STREAM);
			if (streams == -1)
				return -EIO;
		}

		bps = 0;
		if (streams & AC_SUPFMT_PCM) {
			if (val & AC_SUPPCM_BITS_8) {
				formats |= SNDRV_PCM_FMTBIT_U8;
				bps = 8;
			}
			if (val & AC_SUPPCM_BITS_16) {
				formats |= SNDRV_PCM_FMTBIT_S16_LE;
				bps = 16;
			}
			if (wcaps & AC_WCAP_DIGITAL) {
				if (val & AC_SUPPCM_BITS_32)
					formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
				if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24))
					formats |= SNDRV_PCM_FMTBIT_S32_LE;
				if (val & AC_SUPPCM_BITS_24)
					bps = 24;
				else if (val & AC_SUPPCM_BITS_20)
					bps = 20;
			} else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24|
					  AC_SUPPCM_BITS_32)) {
				formats |= SNDRV_PCM_FMTBIT_S32_LE;
				if (val & AC_SUPPCM_BITS_32)
					bps = 32;
				else if (val & AC_SUPPCM_BITS_24)
					bps = 24;
				else if (val & AC_SUPPCM_BITS_20)
					bps = 20;
			}
		}
		else if (streams == AC_SUPFMT_FLOAT32) {
			/* should be exclusive */
			formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
			bps = 32;
		} else if (streams == AC_SUPFMT_AC3) {
			/* should be exclusive */
			/* temporary hack: we have still no proper support
			 * for the direct AC3 stream...
			 */
			formats |= SNDRV_PCM_FMTBIT_U8;
			bps = 8;
		}
		if (formatsp)
			*formatsp = formats;
		if (bpsp)
			*bpsp = bps;
	}

	return 0;
}

/**
 * snd_hda_is_supported_format - check whether the given node supports
 * the format val
 *
 * Returns 1 if supported, 0 if not.
 */
int snd_hda_is_supported_format(struct hda_codec *codec, hda_nid_t nid,
				unsigned int format)
{
	int i;
	unsigned int val = 0, rate, stream;

	if (nid != codec->afg &&
	    (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD)) {
		val = snd_hda_param_read(codec, nid, AC_PAR_PCM);
		if (val == -1)
			return 0;
	}
	if (!val) {
		val = snd_hda_param_read(codec, codec->afg, AC_PAR_PCM);
		if (val == -1)
			return 0;
	}

	rate = format & 0xff00;
	for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++)
		if (rate_bits[i].hda_fmt == rate) {
			if (val & (1 << i))
				break;
			return 0;
		}
	if (i >= AC_PAR_PCM_RATE_BITS)
		return 0;

	stream = snd_hda_param_read(codec, nid, AC_PAR_STREAM);
	if (stream == -1)
		return 0;
	if (!stream && nid != codec->afg)
		stream = snd_hda_param_read(codec, codec->afg, AC_PAR_STREAM);
	if (!stream || stream == -1)
		return 0;

	if (stream & AC_SUPFMT_PCM) {
		switch (format & 0xf0) {
		case 0x00:
			if (!(val & AC_SUPPCM_BITS_8))
				return 0;
			break;