soc-dapm.c

linux 内核源代码

			wsink->id == snd_soc_dapm_line ||
			wsink->id == snd_soc_dapm_output)
			wsink->ext = 1;
	}
	if (wsource->id == snd_soc_dapm_output) {
		if (wsink->id == snd_soc_dapm_spk ||
			wsink->id == snd_soc_dapm_hp ||
			wsink->id == snd_soc_dapm_line ||
			wsink->id == snd_soc_dapm_input)
			wsource->ext = 1;
	}

	/* connect static paths */
	if (control == NULL) {
		list_add(&path->list, &codec->dapm_paths);
		list_add(&path->list_sink, &wsink->sources);
		list_add(&path->list_source, &wsource->sinks);
		path->connect = 1;
		return 0;
	}

	/* connect dynamic paths */
	switch(wsink->id) {
	case snd_soc_dapm_adc:
	case snd_soc_dapm_dac:
	case snd_soc_dapm_pga:
	case snd_soc_dapm_input:
	case snd_soc_dapm_output:
	case snd_soc_dapm_micbias:
	case snd_soc_dapm_vmid:
	case snd_soc_dapm_pre:
	case snd_soc_dapm_post:
		list_add(&path->list, &codec->dapm_paths);
		list_add(&path->list_sink, &wsink->sources);
		list_add(&path->list_source, &wsource->sinks);
		path->connect = 1;
		return 0;
	case snd_soc_dapm_mux:
		ret = dapm_connect_mux(codec, wsource, wsink, path, control,
			&wsink->kcontrols[0]);
		if (ret != 0)
			goto err;
		break;
	case snd_soc_dapm_switch:
	case snd_soc_dapm_mixer:
		ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
		if (ret != 0)
			goto err;
		break;
	case snd_soc_dapm_hp:
	case snd_soc_dapm_mic:
	case snd_soc_dapm_line:
	case snd_soc_dapm_spk:
		list_add(&path->list, &codec->dapm_paths);
		list_add(&path->list_sink, &wsink->sources);
		list_add(&path->list_source, &wsource->sinks);
		path->connect = 0;
		return 0;
	}
	return 0;

err:
	printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
		control, sink);
	kfree(path);
	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_connect_input);

/**
 * snd_soc_dapm_new_widgets - add new dapm widgets
 * @codec: audio codec
 *
 * Checks the codec for any new dapm widgets and creates them if found.
 *
 * Returns 0 for success.
 */
int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
{
	struct snd_soc_dapm_widget *w;

	mutex_lock(&codec->mutex);
	list_for_each_entry(w, &codec->dapm_widgets, list)
	{
		if (w->new)
			continue;

		switch(w->id) {
		case snd_soc_dapm_switch:
		case snd_soc_dapm_mixer:
			dapm_new_mixer(codec, w);
			break;
		case snd_soc_dapm_mux:
			dapm_new_mux(codec, w);
			break;
		case snd_soc_dapm_adc:
		case snd_soc_dapm_dac:
		case snd_soc_dapm_pga:
			dapm_new_pga(codec, w);
			break;
		case snd_soc_dapm_input:
		case snd_soc_dapm_output:
		case snd_soc_dapm_micbias:
		case snd_soc_dapm_spk:
		case snd_soc_dapm_hp:
		case snd_soc_dapm_mic:
		case snd_soc_dapm_line:
		case snd_soc_dapm_vmid:
		case snd_soc_dapm_pre:
		case snd_soc_dapm_post:
			break;
		}
		w->new = 1;
	}

	dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
	mutex_unlock(&codec->mutex);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);

/**
 * snd_soc_dapm_get_volsw - dapm mixer get callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to get the value of a dapm mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0x0f;
	int rshift = (kcontrol->private_value >> 12) & 0x0f;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0x01;

	/* return the saved value if we are powered down */
	if (widget->id == snd_soc_dapm_pga && !widget->power) {
		ucontrol->value.integer.value[0] = widget->saved_value;
		return 0;
	}

	ucontrol->value.integer.value[0] =
		(snd_soc_read(widget->codec, reg) >> shift) & mask;
	if (shift != rshift)
		ucontrol->value.integer.value[1] =
			(snd_soc_read(widget->codec, reg) >> rshift) & mask;
	if (invert) {
		ucontrol->value.integer.value[0] =
			mask - ucontrol->value.integer.value[0];
		if (shift != rshift)
			ucontrol->value.integer.value[1] =
				mask - ucontrol->value.integer.value[1];
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);

/**
 * snd_soc_dapm_put_volsw - dapm mixer set callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to set the value of a dapm mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0x0f;
	int rshift = (kcontrol->private_value >> 12) & 0x0f;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0x01;
	unsigned short val, val2, val_mask;
	int ret;

	val = (ucontrol->value.integer.value[0] & mask);

	if (invert)
		val = mask - val;
	val_mask = mask << shift;
	val = val << shift;
	if (shift != rshift) {
		val2 = (ucontrol->value.integer.value[1] & mask);
		if (invert)
			val2 = mask - val2;
		val_mask |= mask << rshift;
		val |= val2 << rshift;
	}

	mutex_lock(&widget->codec->mutex);
	widget->value = val;

	/* save volume value if the widget is powered down */
	if (widget->id == snd_soc_dapm_pga && !widget->power) {
		widget->saved_value = val;
		mutex_unlock(&widget->codec->mutex);
		return 1;
	}

	dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
	if (widget->event) {
		if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
			ret = widget->event(widget, SND_SOC_DAPM_PRE_REG);
			if (ret < 0)
				goto out;
		}
		ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
		if (widget->event_flags & SND_SOC_DAPM_POST_REG)
			ret = widget->event(widget, SND_SOC_DAPM_POST_REG);
	} else
		ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);

out:
	mutex_unlock(&widget->codec->mutex);
	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);

/**
 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to get the value of a dapm enumerated double mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
	unsigned short val, bitmask;

	for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
		;
	val = snd_soc_read(widget->codec, e->reg);
	ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
	if (e->shift_l != e->shift_r)
		ucontrol->value.enumerated.item[1] =
			(val >> e->shift_r) & (bitmask - 1);

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);

/**
 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to set the value of a dapm enumerated double mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
	unsigned short val, mux;
	unsigned short mask, bitmask;
	int ret = 0;

	for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
		;
	if (ucontrol->value.enumerated.item[0] > e->mask - 1)
		return -EINVAL;
	mux = ucontrol->value.enumerated.item[0];
	val = mux << e->shift_l;
	mask = (bitmask - 1) << e->shift_l;
	if (e->shift_l != e->shift_r) {
		if (ucontrol->value.enumerated.item[1] > e->mask - 1)
			return -EINVAL;
		val |= ucontrol->value.enumerated.item[1] << e->shift_r;
		mask |= (bitmask - 1) << e->shift_r;
	}

	mutex_lock(&widget->codec->mutex);
	widget->value = val;
	dapm_mux_update_power(widget, kcontrol, mask, mux, e);
	if (widget->event) {
		if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
			ret = widget->event(widget, SND_SOC_DAPM_PRE_REG);
			if (ret < 0)
				goto out;
		}
		ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
		if (widget->event_flags & SND_SOC_DAPM_POST_REG)
			ret = widget->event(widget, SND_SOC_DAPM_POST_REG);
	} else
		ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);

out:
	mutex_unlock(&widget->codec->mutex);
	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);

/**
 * snd_soc_dapm_new_control - create new dapm control
 * @codec: audio codec
 * @widget: widget template
 *
 * Creates a new dapm control based upon the template.
 *
 * Returns 0 for success else error.
 */
int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
	const struct snd_soc_dapm_widget *widget)
{
	struct snd_soc_dapm_widget *w;

	if ((w = dapm_cnew_widget(widget)) == NULL)
		return -ENOMEM;

	w->codec = codec;
	INIT_LIST_HEAD(&w->sources);
	INIT_LIST_HEAD(&w->sinks);
	INIT_LIST_HEAD(&w->list);
	list_add(&w->list, &codec->dapm_widgets);

	/* machine layer set ups unconnected pins and insertions */
	w->connected = 1;
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);

/**
 * snd_soc_dapm_stream_event - send a stream event to the dapm core
 * @codec: audio codec
 * @stream: stream name
 * @event: stream event
 *
 * Sends a stream event to the dapm core. The core then makes any
 * necessary widget power changes.
 *
 * Returns 0 for success else error.
 */
int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
	char *stream, int event)
{
	struct snd_soc_dapm_widget *w;

	if (stream == NULL)
		return 0;

	mutex_lock(&codec->mutex);
	list_for_each_entry(w, &codec->dapm_widgets, list)
	{
		if (!w->sname)
			continue;
		dbg("widget %s\n %s stream %s event %d\n", w->name, w->sname,
			stream, event);
		if (strstr(w->sname, stream)) {
			switch(event) {
			case SND_SOC_DAPM_STREAM_START:
				w->active = 1;
				break;
			case SND_SOC_DAPM_STREAM_STOP:
				w->active = 0;
				break;
			case SND_SOC_DAPM_STREAM_SUSPEND:
				if (w->active)
					w->suspend = 1;
				w->active = 0;
				break;
			case SND_SOC_DAPM_STREAM_RESUME:
				if (w->suspend) {
					w->active = 1;
					w->suspend = 0;
				}
				break;
			case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
				break;
			case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
				break;
			}
		}
	}
	mutex_unlock(&codec->mutex);

	dapm_power_widgets(codec, event);
	dump_dapm(codec, __FUNCTION__);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);

/**
 * snd_soc_dapm_set_endpoint - set audio endpoint status
 * @codec: audio codec
 * @endpoint: audio signal endpoint (or start point)
 * @status: point status
 *
 * Set audio endpoint status - connected or disconnected.
 *
 * Returns 0 for success else error.
 */
int snd_soc_dapm_set_endpoint(struct snd_soc_codec *codec,
	char *endpoint, int status)
{
	struct snd_soc_dapm_widget *w;

	list_for_each_entry(w, &codec->dapm_widgets, list) {
		if (!strcmp(w->name, endpoint)) {
			w->connected = status;
		}
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_set_endpoint);

/**
 * snd_soc_dapm_free - free dapm resources
 * @socdev: SoC device
 *
 * Free all dapm widgets and resources.
 */
void snd_soc_dapm_free(struct snd_soc_device *socdev)
{
	struct snd_soc_codec *codec = socdev->codec;

	snd_soc_dapm_sys_remove(socdev->dev);
	dapm_free_widgets(codec);
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_free);

/* Module information */
MODULE_AUTHOR("Liam Girdwood, [e-mail], www.wolfsonmicro.com");
MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
MODULE_LICENSE("GPL");