[ALSA] snd-emu10k1: Add emu1010 internal clock rate control for 44100 or 48000.

Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

include/sound/emu10k1.h

@@ -1392,6 +1392,7 @@ struct snd_emu1010 {
 	unsigned int input_source[64];
 	unsigned int adc_pads; /* bit mask */
 	unsigned int dac_pads; /* bit mask */
+	unsigned int internal_clock; /* 44100 or 48000 */
 };
 
 struct snd_emu10k1 {

sound/pci/emu10k1/emu10k1_main.c

@@ -1014,6 +1014,7 @@ static int snd_emu10k1_emu1010_init(struct snd_emu10k1 * emu)
 	/* Word Clock source, Internal 48kHz x1 */
 	snd_emu1010_fpga_write(emu, EMU_HANA_WCLOCK, EMU_HANA_WCLOCK_INT_48K );
 	//snd_emu1010_fpga_write(emu, EMU_HANA_WCLOCK, EMU_HANA_WCLOCK_INT_48K | EMU_HANA_WCLOCK_4X );
+	emu->emu1010.internal_clock = 1; /* 48000 */
 	snd_emu1010_fpga_write(emu, EMU_HANA_DOCK_LEDS_2, 0x12);/* Set LEDs on Audio Dock */
 	snd_emu1010_fpga_write(emu, EMU_HANA_UNMUTE, 0x1); /* Unmute all */
 	//snd_emu1010_fpga_write(emu, 0x7, 0x0); /* Mute all */

sound/pci/emu10k1/emumixer.c

@@ -35,6 +35,7 @@
 #include <linux/init.h>
 #include <sound/core.h>
 #include <sound/emu10k1.h>
+#include <linux/delay.h>
 
 #define AC97_ID_STAC9758	0x83847658
 
@@ -490,6 +491,94 @@ static struct snd_kcontrol_new snd_emu1010_dac_pads[] __devinitdata = {
 	EMU1010_DAC_PADS("DAC1 0202 14dB PAD Playback Switch", EMU_HANA_0202_DAC_PAD1),
 };
 
+
+static int snd_emu1010_internal_clock_info(struct snd_kcontrol *kcontrol,
+					  struct snd_ctl_elem_info *uinfo)
+{
+	static char *texts[2] = {
+		"44100", "48000"
+	};
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+	uinfo->count = 1;
+	uinfo->value.enumerated.items = 2;
+	if (uinfo->value.enumerated.item > 1)
+                uinfo->value.enumerated.item = 1;
+	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
+	return 0;
+}
+
+static int snd_emu1010_internal_clock_get(struct snd_kcontrol *kcontrol,
+					struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);
+
+	ucontrol->value.enumerated.item[0] = emu->emu1010.internal_clock;
+	return 0;
+}
+
+static int snd_emu1010_internal_clock_put(struct snd_kcontrol *kcontrol,
+					struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);
+	unsigned int val;
+	int change = 0;
+
+	val = ucontrol->value.enumerated.item[0] ;
+	change = (emu->emu1010.internal_clock != val);
+	if (change) {
+		emu->emu1010.internal_clock = val;
+		switch (val) {
+		case 0:
+			/* 44100 */
+			/* Mute all */
+			snd_emu1010_fpga_write(emu, EMU_HANA_UNMUTE, EMU_MUTE );
+			/* Default fallback clock 48kHz */
+			snd_emu1010_fpga_write(emu, EMU_HANA_DEFCLOCK, EMU_HANA_DEFCLOCK_44_1K );
+			/* Word Clock source, Internal 44.1kHz x1 */
+			snd_emu1010_fpga_write(emu, EMU_HANA_WCLOCK,
+			EMU_HANA_WCLOCK_INT_44_1K | EMU_HANA_WCLOCK_1X );
+			/* Set LEDs on Audio Dock */
+			snd_emu1010_fpga_write(emu, EMU_HANA_DOCK_LEDS_2,
+				EMU_HANA_DOCK_LEDS_2_44K | EMU_HANA_DOCK_LEDS_2_LOCK );
+			/* Allow DLL to settle */
+			udelay(10000);
+			/* Unmute all */
+			snd_emu1010_fpga_write(emu, EMU_HANA_UNMUTE, EMU_UNMUTE );
+			break;
+		case 1:
+			/* 48000 */
+			/* Mute all */
+			snd_emu1010_fpga_write(emu, EMU_HANA_UNMUTE, EMU_MUTE );
+			/* Default fallback clock 48kHz */
+			snd_emu1010_fpga_write(emu, EMU_HANA_DEFCLOCK, EMU_HANA_DEFCLOCK_48K );
+			/* Word Clock source, Internal 48kHz x1 */
+			snd_emu1010_fpga_write(emu, EMU_HANA_WCLOCK,
+				EMU_HANA_WCLOCK_INT_48K | EMU_HANA_WCLOCK_1X );
+			/* Set LEDs on Audio Dock */
+			snd_emu1010_fpga_write(emu, EMU_HANA_DOCK_LEDS_2,
+				EMU_HANA_DOCK_LEDS_2_48K | EMU_HANA_DOCK_LEDS_2_LOCK );
+			/* Allow DLL to settle */
+			udelay(10000);
+			/* Unmute all */
+			snd_emu1010_fpga_write(emu, EMU_HANA_UNMUTE, EMU_UNMUTE );
+			break;
+		}
+	}
+        return change;
+}
+
+static struct snd_kcontrol_new snd_emu1010_internal_clock =
+{
+	.access =	SNDRV_CTL_ELEM_ACCESS_READWRITE,
+	.iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name =         "Clock Internal Rate",
+	.count =	1,
+	.info =         snd_emu1010_internal_clock_info,
+	.get =          snd_emu1010_internal_clock_get,
+	.put =          snd_emu1010_internal_clock_put
+};
+
 #if 0
 static int snd_audigy_spdif_output_rate_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 {
@@ -1491,6 +1580,9 @@ int __devinit snd_emu10k1_mixer(struct snd_emu10k1 *emu,
 			if (err < 0)
 				return err;
 		}
+		err = snd_ctl_add(card, snd_ctl_new1(&snd_emu1010_internal_clock, emu));
+		if (err < 0)
+			return err;
 	}
 		
 	return 0;

sound/pci/emu10k1/emupcm.c

@@ -358,6 +358,9 @@ static void snd_emu10k1_pcm_init_voice(struct snd_emu10k1 *emu,
 	snd_emu10k1_ptr_write(emu, PTRX, voice, (send_amount[0] << 8) | send_amount[1]);
 	snd_emu10k1_ptr_write(emu, DSL, voice, end_addr | (send_amount[3] << 24));
 	snd_emu10k1_ptr_write(emu, PSST, voice, start_addr | (send_amount[2] << 24));
+	if (emu->card_capabilities->emu1010)
+		pitch_target = PITCH_48000; /* Disable interpolators on emu1010 card */
+	else 
 		pitch_target = emu10k1_calc_pitch_target(runtime->rate);
 	if (extra)
 		snd_emu10k1_ptr_write(emu, CCCA, voice, start_addr |
@@ -698,6 +701,9 @@ static void snd_emu10k1_playback_trigger_voice(struct snd_emu10k1 *emu, struct s
 	voice = evoice->number;
 
 	pitch = snd_emu10k1_rate_to_pitch(runtime->rate) >> 8;
+	if (emu->card_capabilities->emu1010)
+		pitch_target = PITCH_48000; /* Disable interpolators on emu1010 card */
+	else 
 		pitch_target = emu10k1_calc_pitch_target(runtime->rate);
 	snd_emu10k1_ptr_write(emu, PTRX_PITCHTARGET, voice, pitch_target);
 	if (master || evoice->epcm->type == PLAYBACK_EFX)
@@ -1247,10 +1253,20 @@ static int snd_emu10k1_capture_efx_open(struct snd_pcm_substream *substream)
 		 * for 192kHz 24bit, one has 2 channels
 		 */
 #if 1
+		switch (emu->emu1010.internal_clock) {
+		case 0:
+			/* For 44.1kHz */
+			runtime->hw.rates = SNDRV_PCM_RATE_44100;
+			runtime->hw.rate_min = runtime->hw.rate_max = 44100;
+			runtime->hw.channels_min = runtime->hw.channels_max = 8;
+			break;
+		case 1:
 			/* For 48kHz */
 			runtime->hw.rates = SNDRV_PCM_RATE_48000;
 			runtime->hw.rate_min = runtime->hw.rate_max = 48000;
 			runtime->hw.channels_min = runtime->hw.channels_max = 8;
+			break;
+		};
 #endif
 #if 0
 		/* For 96kHz */