hda_generic.c

linux 内核源代码

		return -EINVAL;
	}

	pinctl = AC_PINCTL_IN_EN;
	/* create a proper capture source label */
	type = get_input_type(node, &pinctl);
	if (! type) {
		/* input as default? */
		if (! (node->pin_ctl & AC_PINCTL_IN_EN))
			return 0;
		type = "Input";
	}
	label = spec->cap_labels[spec->input_mux.num_items];
	strcpy(label, type);
	spec->input_mux.items[spec->input_mux.num_items].label = label;

	/* unmute the PIN external input */
	unmute_input(codec, node, 0); /* index = 0? */
	/* set PIN-In enable */
	snd_hda_codec_write_cache(codec, node->nid, 0,
				  AC_VERB_SET_PIN_WIDGET_CONTROL, pinctl);

	return 1; /* found */
}

/* add a capture source element */
static void add_cap_src(struct hda_gspec *spec, int idx)
{
	struct hda_input_mux_item *csrc;
	char *buf;
	int num, ocap;

	num = spec->input_mux.num_items;
	csrc = &spec->input_mux.items[num];
	buf = spec->cap_labels[num];
	for (ocap = 0; ocap < num; ocap++) {
		if (! strcmp(buf, spec->cap_labels[ocap])) {
			/* same label already exists,
			 * put the index number to be unique
			 */
			sprintf(buf, "%s %d", spec->cap_labels[ocap], num);
			break;
		}
	}
	csrc->index = idx;
	spec->input_mux.num_items++;
}

/*
 * parse input
 */
static int parse_input_path(struct hda_codec *codec, struct hda_gnode *adc_node)
{
	struct hda_gspec *spec = codec->spec;
	struct hda_gnode *node;
	int i, err;

	snd_printdd("AUD_IN = %x\n", adc_node->nid);
	clear_check_flags(spec);

	// awk added - fixed no recording due to muted widget
	unmute_input(codec, adc_node, 0);
	
	/*
	 * check each connection of the ADC
	 * if it reaches to a proper input PIN, add the path as the
	 * input path.
	 */
	/* first, check the direct connections to PIN widgets */
	for (i = 0; i < adc_node->nconns; i++) {
		node = hda_get_node(spec, adc_node->conn_list[i]);
		if (node && node->type == AC_WID_PIN) {
			err = parse_adc_sub_nodes(codec, spec, node);
			if (err < 0)
				return err;
			else if (err > 0)
				add_cap_src(spec, i);
		}
	}
	/* ... then check the rests, more complicated connections */
	for (i = 0; i < adc_node->nconns; i++) {
		node = hda_get_node(spec, adc_node->conn_list[i]);
		if (node && node->type != AC_WID_PIN) {
			err = parse_adc_sub_nodes(codec, spec, node);
			if (err < 0)
				return err;
			else if (err > 0)
				add_cap_src(spec, i);
		}
	}

	if (! spec->input_mux.num_items)
		return 0; /* no input path found... */

	snd_printdd("[Capture Source] NID=0x%x, #SRC=%d\n", adc_node->nid, spec->input_mux.num_items);
	for (i = 0; i < spec->input_mux.num_items; i++)
		snd_printdd("  [%s] IDX=0x%x\n", spec->input_mux.items[i].label,
			    spec->input_mux.items[i].index);

	spec->adc_node = adc_node;
	return 1;
}

/*
 * parse input
 */
static int parse_input(struct hda_codec *codec)
{
	struct hda_gspec *spec = codec->spec;
	struct hda_gnode *node;
	int err;

	/*
	 * At first we look for an audio input widget.
	 * If it reaches to certain input PINs, we take it as the
	 * input path.
	 */
	list_for_each_entry(node, &spec->nid_list, list) {
		if (node->wid_caps & AC_WCAP_DIGITAL)
			continue; /* skip SPDIF */
		if (node->type == AC_WID_AUD_IN) {
			err = parse_input_path(codec, node);
			if (err < 0)
				return err;
			else if (err > 0)
				return 0;
		}
	}
	snd_printd("hda_generic: no proper input path found\n");
	return 0;
}

#ifdef CONFIG_SND_HDA_POWER_SAVE
static void add_input_loopback(struct hda_codec *codec, hda_nid_t nid,
			       int dir, int idx)
{
	struct hda_gspec *spec = codec->spec;
	struct hda_amp_list *p;

	if (spec->num_loopbacks >= MAX_LOOPBACK_AMPS) {
		snd_printk(KERN_ERR "hda_generic: Too many loopback ctls\n");
		return;
	}
	p = &spec->loopback_list[spec->num_loopbacks++];
	p->nid = nid;
	p->dir = dir;
	p->idx = idx;
	spec->loopback.amplist = spec->loopback_list;
}
#else
#define add_input_loopback(codec,nid,dir,idx)
#endif

/*
 * create mixer controls if possible
 */
static int create_mixer(struct hda_codec *codec, struct hda_gnode *node,
			unsigned int index, const char *type,
			const char *dir_sfx, int is_loopback)
{
	char name[32];
	int err;
	int created = 0;
	struct snd_kcontrol_new knew;

	if (type)
		sprintf(name, "%s %s Switch", type, dir_sfx);
	else
		sprintf(name, "%s Switch", dir_sfx);
	if ((node->wid_caps & AC_WCAP_IN_AMP) &&
	    (node->amp_in_caps & AC_AMPCAP_MUTE)) {
		knew = (struct snd_kcontrol_new)HDA_CODEC_MUTE(name, node->nid, index, HDA_INPUT);
		if (is_loopback)
			add_input_loopback(codec, node->nid, HDA_INPUT, index);
		snd_printdd("[%s] NID=0x%x, DIR=IN, IDX=0x%x\n", name, node->nid, index);
		if ((err = snd_ctl_add(codec->bus->card, snd_ctl_new1(&knew, codec))) < 0)
			return err;
		created = 1;
	} else if ((node->wid_caps & AC_WCAP_OUT_AMP) &&
		   (node->amp_out_caps & AC_AMPCAP_MUTE)) {
		knew = (struct snd_kcontrol_new)HDA_CODEC_MUTE(name, node->nid, 0, HDA_OUTPUT);
		if (is_loopback)
			add_input_loopback(codec, node->nid, HDA_OUTPUT, 0);
		snd_printdd("[%s] NID=0x%x, DIR=OUT\n", name, node->nid);
		if ((err = snd_ctl_add(codec->bus->card, snd_ctl_new1(&knew, codec))) < 0)
			return err;
		created = 1;
	}

	if (type)
		sprintf(name, "%s %s Volume", type, dir_sfx);
	else
		sprintf(name, "%s Volume", dir_sfx);
	if ((node->wid_caps & AC_WCAP_IN_AMP) &&
	    (node->amp_in_caps & AC_AMPCAP_NUM_STEPS)) {
		knew = (struct snd_kcontrol_new)HDA_CODEC_VOLUME(name, node->nid, index, HDA_INPUT);
		snd_printdd("[%s] NID=0x%x, DIR=IN, IDX=0x%x\n", name, node->nid, index);
		if ((err = snd_ctl_add(codec->bus->card, snd_ctl_new1(&knew, codec))) < 0)
			return err;
		created = 1;
	} else if ((node->wid_caps & AC_WCAP_OUT_AMP) &&
		   (node->amp_out_caps & AC_AMPCAP_NUM_STEPS)) {
		knew = (struct snd_kcontrol_new)HDA_CODEC_VOLUME(name, node->nid, 0, HDA_OUTPUT);
		snd_printdd("[%s] NID=0x%x, DIR=OUT\n", name, node->nid);
		if ((err = snd_ctl_add(codec->bus->card, snd_ctl_new1(&knew, codec))) < 0)
			return err;
		created = 1;
	}

	return created;
}

/*
 * check whether the controls with the given name and direction suffix already exist
 */
static int check_existing_control(struct hda_codec *codec, const char *type, const char *dir)
{
	struct snd_ctl_elem_id id;
	memset(&id, 0, sizeof(id));
	sprintf(id.name, "%s %s Volume", type, dir);
	id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
	if (snd_ctl_find_id(codec->bus->card, &id))
		return 1;
	sprintf(id.name, "%s %s Switch", type, dir);
	id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
	if (snd_ctl_find_id(codec->bus->card, &id))
		return 1;
	return 0;
}

/*
 * build output mixer controls
 */
static int create_output_mixers(struct hda_codec *codec, const char **names)
{
	struct hda_gspec *spec = codec->spec;
	int i, err;

	for (i = 0; i < spec->pcm_vol_nodes; i++) {
		err = create_mixer(codec, spec->pcm_vol[i].node,
				   spec->pcm_vol[i].index,
				   names[i], "Playback", 0);
		if (err < 0)
			return err;
	}
	return 0;
}

static int build_output_controls(struct hda_codec *codec)
{
	struct hda_gspec *spec = codec->spec;
	static const char *types_speaker[] = { "Speaker", "Headphone" };
	static const char *types_line[] = { "Front", "Headphone" };

	switch (spec->pcm_vol_nodes) {
	case 1:
		return create_mixer(codec, spec->pcm_vol[0].node,
				    spec->pcm_vol[0].index,
				    "Master", "Playback", 0);
	case 2:
		if (defcfg_type(spec->out_pin_node[0]) == AC_JACK_SPEAKER)
			return create_output_mixers(codec, types_speaker);
		else
			return create_output_mixers(codec, types_line);
	}
	return 0;
}

/* create capture volume/switch */
static int build_input_controls(struct hda_codec *codec)
{
	struct hda_gspec *spec = codec->spec;
	struct hda_gnode *adc_node = spec->adc_node;
	int i, err;
	static struct snd_kcontrol_new cap_sel = {
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Capture Source",
		.info = capture_source_info,
		.get = capture_source_get,
		.put = capture_source_put,
	};

	if (! adc_node || ! spec->input_mux.num_items)
		return 0; /* not found */

	spec->cur_cap_src = 0;
	select_input_connection(codec, adc_node,
				spec->input_mux.items[0].index);

	/* create capture volume and switch controls if the ADC has an amp */
	/* do we have only a single item? */
	if (spec->input_mux.num_items == 1) {
		err = create_mixer(codec, adc_node,
				   spec->input_mux.items[0].index,
				   NULL, "Capture", 0);
		if (err < 0)
			return err;
		return 0;
	}

	/* create input MUX if multiple sources are available */
	if ((err = snd_ctl_add(codec->bus->card,
			       snd_ctl_new1(&cap_sel, codec))) < 0)
		return err;

	/* no volume control? */
	if (! (adc_node->wid_caps & AC_WCAP_IN_AMP) ||
	    ! (adc_node->amp_in_caps & AC_AMPCAP_NUM_STEPS))
		return 0;

	for (i = 0; i < spec->input_mux.num_items; i++) {
		struct snd_kcontrol_new knew;
		char name[32];
		sprintf(name, "%s Capture Volume",
			spec->input_mux.items[i].label);
		knew = (struct snd_kcontrol_new)
			HDA_CODEC_VOLUME(name, adc_node->nid,
					 spec->input_mux.items[i].index,
					 HDA_INPUT);
		if ((err = snd_ctl_add(codec->bus->card,
				       snd_ctl_new1(&knew, codec))) < 0)
			return err;
	}

	return 0;
}


/*
 * parse the nodes recursively until reach to the output PIN.
 *
 * returns 0 - if not found,
 *         1 - if found, but no mixer is created
 *         2 - if found and mixer was already created, (just skip)
 *         a negative error code
 */
static int parse_loopback_path(struct hda_codec *codec, struct hda_gspec *spec,
			       struct hda_gnode *node, struct hda_gnode *dest_node,
			       const char *type)
{
	int i, err;

	if (node->checked)
		return 0;

	node->checked = 1;
	if (node == dest_node) {
		/* loopback connection found */
		return 1;
	}

	for (i = 0; i < node->nconns; i++) {
		struct hda_gnode *child = hda_get_node(spec, node->conn_list[i]);
		if (! child)
			continue;
		err = parse_loopback_path(codec, spec, child, dest_node, type);
		if (err < 0)
			return err;
		else if (err >= 1) {
			if (err == 1) {
				err = create_mixer(codec, node, i, type,
						   "Playback", 1);
				if (err < 0)
					return err;
				if (err > 0)
					return 2; /* ok, created */
				/* not created, maybe in the lower path */
				err = 1;
			}
			/* connect and unmute */
			if (node->nconns > 1)
				select_input_connection(codec, node, i);
			unmute_input(codec, node, i);
			unmute_output(codec, node);
			return err;
		}
	}
	return 0;
}

/*
 * parse the tree and build the loopback controls
 */
static int build_loopback_controls(struct hda_codec *codec)
{
	struct hda_gspec *spec = codec->spec;
	struct hda_gnode *node;
	int err;
	const char *type;

	if (! spec->out_pin_node[0])
		return 0;

	list_for_each_entry(node, &spec->nid_list, list) {
		if (node->type != AC_WID_PIN)
			continue;
		/* input capable? */
		if (! (node->pin_caps & AC_PINCAP_IN))
			return 0;
		type = get_input_type(node, NULL);
		if (type) {
			if (check_existing_control(codec, type, "Playback"))
				continue;
			clear_check_flags(spec);
			err = parse_loopback_path(codec, spec,
						  spec->out_pin_node[0],
						  node, type);
			if (err < 0)
				return err;
			if (! err)
				continue;
		}
	}
	return 0;
}

/*
 * build mixer controls
 */
static int build_generic_controls(struct hda_codec *codec)
{
	int err;

	if ((err = build_input_controls(codec)) < 0 ||
	    (err = build_output_controls(codec)) < 0 ||
	    (err = build_loopback_controls(codec)) < 0)
		return err;

	return 0;
}

/*
 * PCM
 */
static struct hda_pcm_stream generic_pcm_playback = {
	.substreams = 1,
	.channels_min = 2,
	.channels_max = 2,
};

static int generic_pcm2_prepare(struct hda_pcm_stream *hinfo,
				struct hda_codec *codec,
				unsigned int stream_tag,
				unsigned int format,
				struct snd_pcm_substream *substream)
{
	struct hda_gspec *spec = codec->spec;

	snd_hda_codec_setup_stream(codec, hinfo->nid, stream_tag, 0, format);
	snd_hda_codec_setup_stream(codec, spec->dac_node[1]->nid,
				   stream_tag, 0, format);
	return 0;
}

static int generic_pcm2_cleanup(struct hda_pcm_stream *hinfo,
				struct hda_codec *codec,
				struct snd_pcm_substream *substream)
{
	struct hda_gspec *spec = codec->spec;

	snd_hda_codec_setup_stream(codec, hinfo->nid, 0, 0, 0);
	snd_hda_codec_setup_stream(codec, spec->dac_node[1]->nid, 0, 0, 0);
	return 0;
}

static int build_generic_pcms(struct hda_codec *codec)
{
	struct hda_gspec *spec = codec->spec;
	struct hda_pcm *info = &spec->pcm_rec;

	if (! spec->dac_node[0] && ! spec->adc_node) {
		snd_printd("hda_generic: no PCM found\n");
		return 0;
	}

	codec->num_pcms = 1;
	codec->pcm_info = info;

	info->name = "HDA Generic";
	if (spec->dac_node[0]) {
		info->stream[0] = generic_pcm_playback;
		info->stream[0].nid = spec->dac_node[0]->nid;
		if (spec->dac_node[1]) {
			info->stream[0].ops.prepare = generic_pcm2_prepare;
			info->stream[0].ops.cleanup = generic_pcm2_cleanup;
		}
	}
	if (spec->adc_node) {
		info->stream[1] = generic_pcm_playback;
		info->stream[1].nid = spec->adc_node->nid;
	}

	return 0;
}

#ifdef CONFIG_SND_HDA_POWER_SAVE
static int generic_check_power_status(struct hda_codec *codec, hda_nid_t nid)
{
	struct hda_gspec *spec = codec->spec;
	return snd_hda_check_amp_list_power(codec, &spec->loopback, nid);
}
#endif


/*
 */
static struct hda_codec_ops generic_patch_ops = {
	.build_controls = build_generic_controls,
	.build_pcms = build_generic_pcms,
	.free = snd_hda_generic_free,
#ifdef CONFIG_SND_HDA_POWER_SAVE
	.check_power_status = generic_check_power_status,
#endif
};

/*
 * the generic parser
 */
int snd_hda_parse_generic_codec(struct hda_codec *codec)
{
	struct hda_gspec *spec;
	int err;

	if(!codec->afg)
		return 0;

	spec = kzalloc(sizeof(*spec), GFP_KERNEL);
	if (spec == NULL) {
		printk(KERN_ERR "hda_generic: can't allocate spec\n");
		return -ENOMEM;
	}
	codec->spec = spec;
	INIT_LIST_HEAD(&spec->nid_list);

	if ((err = build_afg_tree(codec)) < 0)
		goto error;

	if ((err = parse_input(codec)) < 0 ||
	    (err = parse_output(codec)) < 0)
		goto error;

	codec->patch_ops = generic_patch_ops;

	return 0;

 error:
	snd_hda_generic_free(codec);
	return err;
}