ASoC: Add input and output AIF widgets

Currently DAPM interfaces with the audio streams to and from the
processor at the DAC and ADC widgets. As the digital capabilities
of parts increases this is becoming a less and less able to meet
the needs of parts.

To meet the needs of these devices create new widgets interfacing
with the TDM bus but not integrated into any other functionality.
Audio can then be routed to and from these widgets using existing
routing widgets.

A slot number is provided in the definition but this is currently
not used yet. This is intended to support devices which can use
more than one TDM slot on a single interface.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

include/sound/soc-dapm.h

@@ -137,6 +137,12 @@
 	.event_flags = SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD}
 
 /* stream domain */
+#define SND_SOC_DAPM_AIF_IN(wname, stname, wslot, wreg, wshift, winvert) \
+{	.id = snd_soc_dapm_aif_in, .name = wname, .sname = stname, \
+	.reg = wreg, .shift = wshift, .invert = winvert }
+#define SND_SOC_DAPM_AIF_OUT(wname, stname, wslot, wreg, wshift, winvert) \
+{	.id = snd_soc_dapm_aif_out, .name = wname, .sname = stname, \
+	.reg = wreg, .shift = wshift, .invert = winvert }
 #define SND_SOC_DAPM_DAC(wname, stname, wreg, wshift, winvert) \
 {	.id = snd_soc_dapm_dac, .name = wname, .sname = stname, .reg = wreg, \
 	.shift = wshift, .invert = winvert}
@@ -312,6 +318,8 @@ enum snd_soc_dapm_type {
 	snd_soc_dapm_pre,			/* machine specific pre widget - exec first */
 	snd_soc_dapm_post,			/* machine specific post widget - exec last */
 	snd_soc_dapm_supply,		/* power/clock supply */
+	snd_soc_dapm_aif_in,		/* audio interface input */
+	snd_soc_dapm_aif_out,		/* audio interface output */
 };
 
 /*

sound/soc/soc-dapm.c

@@ -55,17 +55,19 @@ static int dapm_up_seq[] = {
 	[snd_soc_dapm_pre] = 0,
 	[snd_soc_dapm_supply] = 1,
 	[snd_soc_dapm_micbias] = 2,
-	[snd_soc_dapm_mic] = 3,
-	[snd_soc_dapm_mux] = 4,
-	[snd_soc_dapm_value_mux] = 4,
-	[snd_soc_dapm_dac] = 5,
-	[snd_soc_dapm_mixer] = 6,
-	[snd_soc_dapm_mixer_named_ctl] = 6,
-	[snd_soc_dapm_pga] = 7,
-	[snd_soc_dapm_adc] = 8,
-	[snd_soc_dapm_hp] = 9,
-	[snd_soc_dapm_spk] = 9,
-	[snd_soc_dapm_post] = 10,
+	[snd_soc_dapm_aif_in] = 3,
+	[snd_soc_dapm_aif_out] = 3,
+	[snd_soc_dapm_mic] = 4,
+	[snd_soc_dapm_mux] = 5,
+	[snd_soc_dapm_value_mux] = 5,
+	[snd_soc_dapm_dac] = 6,
+	[snd_soc_dapm_mixer] = 7,
+	[snd_soc_dapm_mixer_named_ctl] = 7,
+	[snd_soc_dapm_pga] = 8,
+	[snd_soc_dapm_adc] = 9,
+	[snd_soc_dapm_hp] = 10,
+	[snd_soc_dapm_spk] = 10,
+	[snd_soc_dapm_post] = 11,
 };
 
 static int dapm_down_seq[] = {
@@ -81,8 +83,10 @@ static int dapm_down_seq[] = {
 	[snd_soc_dapm_micbias] = 8,
 	[snd_soc_dapm_mux] = 9,
 	[snd_soc_dapm_value_mux] = 9,
-	[snd_soc_dapm_supply] = 10,
-	[snd_soc_dapm_post] = 11,
+	[snd_soc_dapm_aif_in] = 10,
+	[snd_soc_dapm_aif_out] = 10,
+	[snd_soc_dapm_supply] = 11,
+	[snd_soc_dapm_post] = 12,
 };
 
 static void pop_wait(u32 pop_time)
@@ -224,6 +228,8 @@ static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
 	case snd_soc_dapm_micbias:
 	case snd_soc_dapm_vmid:
 	case snd_soc_dapm_supply:
+	case snd_soc_dapm_aif_in:
+	case snd_soc_dapm_aif_out:
 		p->connect = 1;
 	break;
 	/* does effect routing - dynamically connected */
@@ -497,8 +503,14 @@ static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
 	if (widget->id == snd_soc_dapm_supply)
 		return 0;
 
-	if (widget->id == snd_soc_dapm_adc && widget->active)
-		return 1;
+	switch (widget->id) {
+	case snd_soc_dapm_adc:
+	case snd_soc_dapm_aif_out:
+		if (widget->active)
+			return 1;
+	default:
+		break;
+	}
 
 	if (widget->connected) {
 		/* connected pin ? */
@@ -537,8 +549,14 @@ static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
 		return 0;
 
 	/* active stream ? */
-	if (widget->id == snd_soc_dapm_dac && widget->active)
-		return 1;
+	switch (widget->id) {
+	case snd_soc_dapm_dac:
+	case snd_soc_dapm_aif_in:
+		if (widget->active)
+			return 1;
+	default:
+		break;
+	}
 
 	if (widget->connected) {
 		/* connected pin ? */
@@ -1052,6 +1070,8 @@ static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
 		case snd_soc_dapm_mixer:
 		case snd_soc_dapm_mixer_named_ctl:
 		case snd_soc_dapm_supply:
+		case snd_soc_dapm_aif_in:
+		case snd_soc_dapm_aif_out:
 			if (w->name) {
 				in = is_connected_input_ep(w);
 				dapm_clear_walk(w->codec);
@@ -1342,6 +1362,8 @@ static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
 	case snd_soc_dapm_pre:
 	case snd_soc_dapm_post:
 	case snd_soc_dapm_supply:
+	case snd_soc_dapm_aif_in:
+	case snd_soc_dapm_aif_out:
 		list_add(&path->list, &codec->dapm_paths);
 		list_add(&path->list_sink, &wsink->sources);
 		list_add(&path->list_source, &wsource->sinks);
@@ -1444,9 +1466,11 @@ int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
 			dapm_new_mux(codec, w);
 			break;
 		case snd_soc_dapm_adc:
+		case snd_soc_dapm_aif_out:
 			w->power_check = dapm_adc_check_power;
 			break;
 		case snd_soc_dapm_dac:
+		case snd_soc_dapm_aif_in:
 			w->power_check = dapm_dac_check_power;
 			break;
 		case snd_soc_dapm_pga: