hda_codec.c

LINUX 2.6.17.4的源码

 */

/*
 * open the digital out in the exclusive mode
 */
int snd_hda_multi_out_dig_open(struct hda_codec *codec, struct hda_multi_out *mout)
{
	mutex_lock(&codec->spdif_mutex);
	if (mout->dig_out_used) {
		mutex_unlock(&codec->spdif_mutex);
		return -EBUSY; /* already being used */
	}
	mout->dig_out_used = HDA_DIG_EXCLUSIVE;
	mutex_unlock(&codec->spdif_mutex);
	return 0;
}

/*
 * release the digital out
 */
int snd_hda_multi_out_dig_close(struct hda_codec *codec, struct hda_multi_out *mout)
{
	mutex_lock(&codec->spdif_mutex);
	mout->dig_out_used = 0;
	mutex_unlock(&codec->spdif_mutex);
	return 0;
}

/*
 * set up more restrictions for analog out
 */
int snd_hda_multi_out_analog_open(struct hda_codec *codec, struct hda_multi_out *mout,
				  struct snd_pcm_substream *substream)
{
	substream->runtime->hw.channels_max = mout->max_channels;
	return snd_pcm_hw_constraint_step(substream->runtime, 0,
					  SNDRV_PCM_HW_PARAM_CHANNELS, 2);
}

/*
 * set up the i/o for analog out
 * when the digital out is available, copy the front out to digital out, too.
 */
int snd_hda_multi_out_analog_prepare(struct hda_codec *codec, struct hda_multi_out *mout,
				     unsigned int stream_tag,
				     unsigned int format,
				     struct snd_pcm_substream *substream)
{
	hda_nid_t *nids = mout->dac_nids;
	int chs = substream->runtime->channels;
	int i;

	mutex_lock(&codec->spdif_mutex);
	if (mout->dig_out_nid && mout->dig_out_used != HDA_DIG_EXCLUSIVE) {
		if (chs == 2 &&
		    snd_hda_is_supported_format(codec, mout->dig_out_nid, format) &&
		    ! (codec->spdif_status & IEC958_AES0_NONAUDIO)) {
			mout->dig_out_used = HDA_DIG_ANALOG_DUP;
			/* setup digital receiver */
			snd_hda_codec_setup_stream(codec, mout->dig_out_nid,
						   stream_tag, 0, format);
		} else {
			mout->dig_out_used = 0;
			snd_hda_codec_setup_stream(codec, mout->dig_out_nid, 0, 0, 0);
		}
	}
	mutex_unlock(&codec->spdif_mutex);

	/* front */
	snd_hda_codec_setup_stream(codec, nids[HDA_FRONT], stream_tag, 0, format);
	if (mout->hp_nid)
		/* headphone out will just decode front left/right (stereo) */
		snd_hda_codec_setup_stream(codec, mout->hp_nid, stream_tag, 0, format);
	/* extra outputs copied from front */
	for (i = 0; i < ARRAY_SIZE(mout->extra_out_nid); i++)
		if (mout->extra_out_nid[i])
			snd_hda_codec_setup_stream(codec,
						   mout->extra_out_nid[i],
						   stream_tag, 0, format);

	/* surrounds */
	for (i = 1; i < mout->num_dacs; i++) {
		if (chs >= (i + 1) * 2) /* independent out */
			snd_hda_codec_setup_stream(codec, nids[i], stream_tag, i * 2,
						   format);
		else /* copy front */
			snd_hda_codec_setup_stream(codec, nids[i], stream_tag, 0,
						   format);
	}
	return 0;
}

/*
 * clean up the setting for analog out
 */
int snd_hda_multi_out_analog_cleanup(struct hda_codec *codec, struct hda_multi_out *mout)
{
	hda_nid_t *nids = mout->dac_nids;
	int i;

	for (i = 0; i < mout->num_dacs; i++)
		snd_hda_codec_setup_stream(codec, nids[i], 0, 0, 0);
	if (mout->hp_nid)
		snd_hda_codec_setup_stream(codec, mout->hp_nid, 0, 0, 0);
	for (i = 0; i < ARRAY_SIZE(mout->extra_out_nid); i++)
		if (mout->extra_out_nid[i])
			snd_hda_codec_setup_stream(codec,
						   mout->extra_out_nid[i],
						   0, 0, 0);
	mutex_lock(&codec->spdif_mutex);
	if (mout->dig_out_nid && mout->dig_out_used == HDA_DIG_ANALOG_DUP) {
		snd_hda_codec_setup_stream(codec, mout->dig_out_nid, 0, 0, 0);
		mout->dig_out_used = 0;
	}
	mutex_unlock(&codec->spdif_mutex);
	return 0;
}

/*
 * Helper for automatic ping configuration
 */

static int is_in_nid_list(hda_nid_t nid, hda_nid_t *list)
{
	for (; *list; list++)
		if (*list == nid)
			return 1;
	return 0;
}

/*
 * Parse all pin widgets and store the useful pin nids to cfg
 *
 * The number of line-outs or any primary output is stored in line_outs,
 * and the corresponding output pins are assigned to line_out_pins[],
 * in the order of front, rear, CLFE, side, ...
 *
 * If more extra outputs (speaker and headphone) are found, the pins are
 * assisnged to hp_pin and speaker_pins[], respectively.  If no line-out jack
 * is detected, one of speaker of HP pins is assigned as the primary
 * output, i.e. to line_out_pins[0].  So, line_outs is always positive
 * if any analog output exists.
 * 
 * The analog input pins are assigned to input_pins array.
 * The digital input/output pins are assigned to dig_in_pin and dig_out_pin,
 * respectively.
 */
int snd_hda_parse_pin_def_config(struct hda_codec *codec, struct auto_pin_cfg *cfg,
				 hda_nid_t *ignore_nids)
{
	hda_nid_t nid, nid_start;
	int i, j, nodes;
	short seq, assoc_line_out, sequences[ARRAY_SIZE(cfg->line_out_pins)];

	memset(cfg, 0, sizeof(*cfg));

	memset(sequences, 0, sizeof(sequences));
	assoc_line_out = 0;

	nodes = snd_hda_get_sub_nodes(codec, codec->afg, &nid_start);
	for (nid = nid_start; nid < nodes + nid_start; nid++) {
		unsigned int wid_caps = get_wcaps(codec, nid);
		unsigned int wid_type = (wid_caps & AC_WCAP_TYPE) >> AC_WCAP_TYPE_SHIFT;
		unsigned int def_conf;
		short assoc, loc;

		/* read all default configuration for pin complex */
		if (wid_type != AC_WID_PIN)
			continue;
		/* ignore the given nids (e.g. pc-beep returns error) */
		if (ignore_nids && is_in_nid_list(nid, ignore_nids))
			continue;

		def_conf = snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_CONFIG_DEFAULT, 0);
		if (get_defcfg_connect(def_conf) == AC_JACK_PORT_NONE)
			continue;
		loc = get_defcfg_location(def_conf);
		switch (get_defcfg_device(def_conf)) {
		case AC_JACK_LINE_OUT:
			seq = get_defcfg_sequence(def_conf);
			assoc = get_defcfg_association(def_conf);
			if (! assoc)
				continue;
			if (! assoc_line_out)
				assoc_line_out = assoc;
			else if (assoc_line_out != assoc)
				continue;
			if (cfg->line_outs >= ARRAY_SIZE(cfg->line_out_pins))
				continue;
			cfg->line_out_pins[cfg->line_outs] = nid;
			sequences[cfg->line_outs] = seq;
			cfg->line_outs++;
			break;
		case AC_JACK_SPEAKER:
			if (cfg->speaker_outs >= ARRAY_SIZE(cfg->speaker_pins))
				continue;
			cfg->speaker_pins[cfg->speaker_outs] = nid;
			cfg->speaker_outs++;
			break;
		case AC_JACK_HP_OUT:
			cfg->hp_pin = nid;
			break;
		case AC_JACK_MIC_IN:
			if (loc == AC_JACK_LOC_FRONT)
				cfg->input_pins[AUTO_PIN_FRONT_MIC] = nid;
			else
				cfg->input_pins[AUTO_PIN_MIC] = nid;
			break;
		case AC_JACK_LINE_IN:
			if (loc == AC_JACK_LOC_FRONT)
				cfg->input_pins[AUTO_PIN_FRONT_LINE] = nid;
			else
				cfg->input_pins[AUTO_PIN_LINE] = nid;
			break;
		case AC_JACK_CD:
			cfg->input_pins[AUTO_PIN_CD] = nid;
			break;
		case AC_JACK_AUX:
			cfg->input_pins[AUTO_PIN_AUX] = nid;
			break;
		case AC_JACK_SPDIF_OUT:
			cfg->dig_out_pin = nid;
			break;
		case AC_JACK_SPDIF_IN:
			cfg->dig_in_pin = nid;
			break;
		}
	}

	/* sort by sequence */
	for (i = 0; i < cfg->line_outs; i++)
		for (j = i + 1; j < cfg->line_outs; j++)
			if (sequences[i] > sequences[j]) {
				seq = sequences[i];
				sequences[i] = sequences[j];
				sequences[j] = seq;
				nid = cfg->line_out_pins[i];
				cfg->line_out_pins[i] = cfg->line_out_pins[j];
				cfg->line_out_pins[j] = nid;
			}

	/* Reorder the surround channels
	 * ALSA sequence is front/surr/clfe/side
	 * HDA sequence is:
	 *    4-ch: front/surr  =>  OK as it is
	 *    6-ch: front/clfe/surr
	 *    8-ch: front/clfe/side/surr
	 */
	switch (cfg->line_outs) {
	case 3:
		nid = cfg->line_out_pins[1];
		cfg->line_out_pins[1] = cfg->line_out_pins[2];
		cfg->line_out_pins[2] = nid;
		break;
	case 4:
		nid = cfg->line_out_pins[1];
		cfg->line_out_pins[1] = cfg->line_out_pins[3];
		cfg->line_out_pins[3] = cfg->line_out_pins[2];
		cfg->line_out_pins[2] = nid;
		break;
	}

	/*
	 * debug prints of the parsed results
	 */
	snd_printd("autoconfig: line_outs=%d (0x%x/0x%x/0x%x/0x%x/0x%x)\n",
		   cfg->line_outs, cfg->line_out_pins[0], cfg->line_out_pins[1],
		   cfg->line_out_pins[2], cfg->line_out_pins[3],
		   cfg->line_out_pins[4]);
	snd_printd("   speaker_outs=%d (0x%x/0x%x/0x%x/0x%x/0x%x)\n",
		   cfg->speaker_outs, cfg->speaker_pins[0],
		   cfg->speaker_pins[1], cfg->speaker_pins[2],
		   cfg->speaker_pins[3], cfg->speaker_pins[4]);
	snd_printd("   hp=0x%x, dig_out=0x%x, din_in=0x%x\n",
		   cfg->hp_pin, cfg->dig_out_pin, cfg->dig_in_pin);
	snd_printd("   inputs: mic=0x%x, fmic=0x%x, line=0x%x, fline=0x%x,"
		   " cd=0x%x, aux=0x%x\n",
		   cfg->input_pins[AUTO_PIN_MIC],
		   cfg->input_pins[AUTO_PIN_FRONT_MIC],
		   cfg->input_pins[AUTO_PIN_LINE],
		   cfg->input_pins[AUTO_PIN_FRONT_LINE],
		   cfg->input_pins[AUTO_PIN_CD],
		   cfg->input_pins[AUTO_PIN_AUX]);

	/*
	 * FIX-UP: if no line-outs are detected, try to use speaker or HP pin
	 * as a primary output
	 */
	if (! cfg->line_outs) {
		if (cfg->speaker_outs) {
			cfg->line_outs = cfg->speaker_outs;
			memcpy(cfg->line_out_pins, cfg->speaker_pins,
			       sizeof(cfg->speaker_pins));
			cfg->speaker_outs = 0;
			memset(cfg->speaker_pins, 0, sizeof(cfg->speaker_pins));
		} else if (cfg->hp_pin) {
			cfg->line_outs = 1;
			cfg->line_out_pins[0] = cfg->hp_pin;
			cfg->hp_pin = 0;
		}
	}

	return 0;
}

/* labels for input pins */
const char *auto_pin_cfg_labels[AUTO_PIN_LAST] = {
	"Mic", "Front Mic", "Line", "Front Line", "CD", "Aux"
};


#ifdef CONFIG_PM
/*
 * power management
 */

/**
 * snd_hda_suspend - suspend the codecs
 * @bus: the HDA bus
 * @state: suspsend state
 *
 * Returns 0 if successful.
 */
int snd_hda_suspend(struct hda_bus *bus, pm_message_t state)
{
	struct list_head *p;

	/* FIXME: should handle power widget capabilities */
	list_for_each(p, &bus->codec_list) {
		struct hda_codec *codec = list_entry(p, struct hda_codec, list);
		if (codec->patch_ops.suspend)
			codec->patch_ops.suspend(codec, state);
		hda_set_power_state(codec,
				    codec->afg ? codec->afg : codec->mfg,
				    AC_PWRST_D3);
	}
	return 0;
}

/**
 * snd_hda_resume - resume the codecs
 * @bus: the HDA bus
 * @state: resume state
 *
 * Returns 0 if successful.
 */
int snd_hda_resume(struct hda_bus *bus)
{
	struct list_head *p;

	list_for_each(p, &bus->codec_list) {
		struct hda_codec *codec = list_entry(p, struct hda_codec, list);
		hda_set_power_state(codec,
				    codec->afg ? codec->afg : codec->mfg,
				    AC_PWRST_D0);
		if (codec->patch_ops.resume)
			codec->patch_ops.resume(codec);
	}
	return 0;
}

/**
 * snd_hda_resume_ctls - resume controls in the new control list
 * @codec: the HDA codec
 * @knew: the array of struct snd_kcontrol_new
 *
 * This function resumes the mixer controls in the struct snd_kcontrol_new array,
 * originally for snd_hda_add_new_ctls().
 * The array must be terminated with an empty entry as terminator.
 */
int snd_hda_resume_ctls(struct hda_codec *codec, struct snd_kcontrol_new *knew)
{
	struct snd_ctl_elem_value *val;

	val = kmalloc(sizeof(*val), GFP_KERNEL);
	if (! val)
		return -ENOMEM;
	codec->in_resume = 1;
	for (; knew->name; knew++) {
		int i, count;
		count = knew->count ? knew->count : 1;
		for (i = 0; i < count; i++) {
			memset(val, 0, sizeof(*val));
			val->id.iface = knew->iface;
			val->id.device = knew->device;
			val->id.subdevice = knew->subdevice;
			strcpy(val->id.name, knew->name);
			val->id.index = knew->index ? knew->index : i;
			/* Assume that get callback reads only from cache,
			 * not accessing to the real hardware
			 */
			if (snd_ctl_elem_read(codec->bus->card, val) < 0)
				continue;
			snd_ctl_elem_write(codec->bus->card, NULL, val);
		}
	}
	codec->in_resume = 0;
	kfree(val);
	return 0;
}

/**
 * snd_hda_resume_spdif_out - resume the digital out
 * @codec: the HDA codec
 */
int snd_hda_resume_spdif_out(struct hda_codec *codec)
{
	return snd_hda_resume_ctls(codec, dig_mixes);
}

/**
 * snd_hda_resume_spdif_in - resume the digital in
 * @codec: the HDA codec
 */
int snd_hda_resume_spdif_in(struct hda_codec *codec)
{
	return snd_hda_resume_ctls(codec, dig_in_ctls);
}
#endif

/*
 * symbols exported for controller modules
 */
EXPORT_SYMBOL(snd_hda_codec_read);
EXPORT_SYMBOL(snd_hda_codec_write);
EXPORT_SYMBOL(snd_hda_sequence_write);
EXPORT_SYMBOL(snd_hda_get_sub_nodes);
EXPORT_SYMBOL(snd_hda_queue_unsol_event);
EXPORT_SYMBOL(snd_hda_bus_new);
EXPORT_SYMBOL(snd_hda_codec_new);
EXPORT_SYMBOL(snd_hda_codec_setup_stream);
EXPORT_SYMBOL(snd_hda_calc_stream_format);
EXPORT_SYMBOL(snd_hda_build_pcms);
EXPORT_SYMBOL(snd_hda_build_controls);
#ifdef CONFIG_PM
EXPORT_SYMBOL(snd_hda_suspend);
EXPORT_SYMBOL(snd_hda_resume);
#endif

/*
 *  INIT part
 */

static int __init alsa_hda_init(void)
{
	return 0;
}

static void __exit alsa_hda_exit(void)
{
}

module_init(alsa_hda_init)
module_exit(alsa_hda_exit)