Adds headphone mic and some things from xnux

https://xnux.eu/devices/feature/audio-pp.html

In an effort to sort out audio in a call

megiaudioroute.c

@@ -207,6 +207,7 @@ struct audio_setup {
 	bool spk_on;
 	bool hp_on;
 	bool ear_on;
+	bool hpmic_on;
 
 	// when sending audio to modem from AIF1 R, also play that back
 	// to me locally (just like AIF1 L plays just to me)
@@ -225,6 +226,7 @@ struct audio_setup {
 	bool dai2_en;
 
 	int mic_gain;
+	int hpmic_gain;
 	int spk_vol;
 	int ear_vol;
 	int hp_vol;
@@ -241,7 +243,7 @@ static void audio_set_controls(struct audio_setup* s)
 		{ .name = "Mic1 Boost Volume",                              .vals.i = { s->mic_gain } },
 
 		// Mic 2 (headphones)
-		{ .name = "Mic2 Boost Volume",                              .vals.i = { 0 } },
+		{ .name = "Mic2 Boost Volume",                              .vals.i = { s->hpmic_gain } },
 
 		// Line in (unused on PP)
 		// no controls yet
@@ -249,7 +251,7 @@ static void audio_set_controls(struct audio_setup* s)
                 // Input mixers before ADC
 
 		{ .name = "Mic1 Capture Switch",                            .vals.i = { !!s->mic_on, !!s->mic_on } },
-		{ .name = "Mic2 Capture Switch",                            .vals.i = { 0, 0 } },
+		{ .name = "Mic2 Capture Switch",                            .vals.i = { !!s->hpmic_on, !!s->hpmic_on } },
 		{ .name = "Line In Capture Switch",                         .vals.i = { 0, 0 } }, // Out Mix -> In Mix
 		{ .name = "Mixer Capture Switch",                           .vals.i = { 0, 0 } },
 		{ .name = "Mixer Reversed Capture Switch",                  .vals.i = { 0, 0 } },
@@ -337,10 +339,11 @@ static void audio_set_controls(struct audio_setup* s)
 }
 
 static struct audio_setup audio_setup = {
-	.mic_on = true,
-	.ear_on = true,
+	.mic_on = false,
+	.ear_on = false,
 	.spk_on = false,
 	.hp_on = false,
+	.hpmic_on = false,
 
 	.from_modem_on = true,
 	.to_modem_on = true,
@@ -352,13 +355,14 @@ static struct audio_setup audio_setup = {
 	.spk_vol = 15,
 	.ear_vol = 31,
 	.mic_gain = 1,
+	.hpmic_gain = 1,
 };
 
 int main(int ac, char* av[])
 {
 	int opt;
 
-	while ((opt = getopt(ac, av, "smhe2")) != -1) {
+	while ((opt = getopt(ac, av, "smhle2")) != -1) {
 		switch (opt) {
 		case 's':
 			audio_setup.spk_on = 1;
@@ -369,6 +373,9 @@ int main(int ac, char* av[])
 		case 'h':
 			audio_setup.hp_on = 1;
 			break;
+		case 'l':
+			audio_setup.hpmic_on = 1;
+			break;
 		case 'e':
 			audio_setup.ear_on = 1;
 			break;
@@ -376,12 +383,14 @@ int main(int ac, char* av[])
 			audio_setup.dai2_en = 1;
 			break;
 		default: /* '?' */
-			fprintf(stderr, "Usage: %s [-s] [-m] [-h] [-e] [-2]\n", av[0]);
+			fprintf(stderr, "Usage: %s [-s] [-m] [-h] [-l] [-e] [-2]\n", av[0]);
 			fprintf(stderr, "\t-s\tSpeaker On\n");
 			fprintf(stderr, "\t-m\tMicrophone On\n");
 			fprintf(stderr, "\t-h\tHeadphones On\n");
+			fprintf(stderr, "\t-l\tHeadphone Microphone On\n");
 			fprintf(stderr, "\t-e\tEarpiece On\n");
-			fprintf(stderr, "\t-2\t???\n");
+			fprintf(stderr, "\t-2\tDigital Audio Interface\n");
+			fprintf(stderr, "\t\tI think this allows audio input/out to the modem\n");
 			exit(EXIT_FAILURE);
 		}
 	}