[ALSA] replace spdif frequency control with iec958 control

au88x0 driver
The appended patch replaces the manual spdif frequency control in the
mixer with code that use the standard iec958 interface. The patch is
nearly the same as the one Raymond submitted, except it gets rid of the
identical *_default_* versions of the functions, and has a tiny bit of
cleanup.
I have only tested it a little bit because I don't currently
have the hardware to actually test it properly. However, it looks
harmless to me.

Patch-by: Raymond
Signed-off-by: Jeff Muizelaar <muizelaar@rogers.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/au88x0/au88x0_pcm.c

@@ -20,7 +20,7 @@
  * Supports ADB and WT DMA. Unfortunately, WT channels do not run yet.
  * It remains stuck,and DMA transfers do not happen. 
  */
-
+#include <sound/asoundef.h>
 #include <sound/driver.h>
 #include <linux/time.h>
 #include <sound/core.h>
@@ -431,61 +431,78 @@ static char *vortex_pcm_name[VORTEX_PCM_LAST] = {
 };
 
 /* SPDIF kcontrol */
-static int
-snd_vortex_spdif_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
-{
-	static char *texts[] = { "32000", "44100", "48000" };
 
-	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+static int snd_vortex_spdif_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 	uinfo->count = 1;
-	uinfo->value.enumerated.items = 3;
-	if (uinfo->value.enumerated.item >= uinfo->value.enumerated.items)
-		uinfo->value.enumerated.item =
-		    uinfo->value.enumerated.items - 1;
-	strcpy(uinfo->value.enumerated.name,
-	       texts[uinfo->value.enumerated.item]);
 	return 0;
 }
-static int
-snd_vortex_spdif_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
-{
-	vortex_t *vortex = snd_kcontrol_chip(kcontrol);
 
-	if (vortex->spdif_sr == 32000)
-		ucontrol->value.enumerated.item[0] = 0;
-	if (vortex->spdif_sr == 44100)
-		ucontrol->value.enumerated.item[0] = 1;
-	if (vortex->spdif_sr == 48000)
-		ucontrol->value.enumerated.item[0] = 2;
+static int snd_vortex_spdif_mask_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
+{
+	ucontrol->value.iec958.status[0] = 0xff;
+	ucontrol->value.iec958.status[1] = 0xff;
+	ucontrol->value.iec958.status[2] = 0xff;
+	ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS;
 	return 0;
 }
-static int
-snd_vortex_spdif_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
+
+static int snd_vortex_spdif_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 {
 	vortex_t *vortex = snd_kcontrol_chip(kcontrol);
-	static unsigned int sr[3] = { 32000, 44100, 48000 };
+	ucontrol->value.iec958.status[0] = 0x00;
+	ucontrol->value.iec958.status[1] = IEC958_AES1_CON_ORIGINAL|IEC958_AES1_CON_DIGDIGCONV_ID;
+	ucontrol->value.iec958.status[2] = 0x00;
+	switch (vortex->spdif_sr) {
+	case 32000: ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS_32000; break;
+	case 44100: ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS_44100; break;
+	case 48000: ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS_48000; break;
+	}
+	return 0;
+}
 
-	//printk("vortex: spdif sr = %d\n", ucontrol->value.enumerated.item[0]);
-	vortex->spdif_sr = sr[ucontrol->value.enumerated.item[0] % 3];
-	vortex_spdif_init(vortex,
-			  sr[ucontrol->value.enumerated.item[0] % 3], 1);
+static int snd_vortex_spdif_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
+{
+	vortex_t *vortex = snd_kcontrol_chip(kcontrol);
+	int spdif_sr = 48000;
+	switch (ucontrol->value.iec958.status[3] & IEC958_AES3_CON_FS) {
+	case IEC958_AES3_CON_FS_32000: spdif_sr = 32000; break;
+	case IEC958_AES3_CON_FS_44100: spdif_sr = 44100; break;
+	case IEC958_AES3_CON_FS_48000: spdif_sr = 48000; break;
+	}
+	if (spdif_sr == vortex->spdif_sr)
+		return 0;
+	vortex->spdif_sr = spdif_sr;
+	vortex_spdif_init(vortex, vortex->spdif_sr, 1);
 	return 1;
 }
-static snd_kcontrol_new_t vortex_spdif_kcontrol __devinitdata = {
-	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
-	.name = "SPDIF SR",
-	.index = 0,
-	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
-	.private_value = 0,
+
+/* spdif controls */
+static snd_kcontrol_new_t snd_vortex_mixer_spdif[] __devinitdata = {
+	{
+		.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
+		.name =		SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
 		.info =		snd_vortex_spdif_info,
 		.get =		snd_vortex_spdif_get,
-	.put = snd_vortex_spdif_put
+		.put =		snd_vortex_spdif_put,
+	},
+	{
+		.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
+		.access =	SNDRV_CTL_ELEM_ACCESS_READ,
+		.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
+		.name =		SNDRV_CTL_NAME_IEC958("",PLAYBACK,CON_MASK),
+		.info =		snd_vortex_spdif_info,
+		.get =		snd_vortex_spdif_mask_get
+	},
 };
 
 /* create a pcm device */
 static int __devinit snd_vortex_new_pcm(vortex_t * chip, int idx, int nr)
 {
 	snd_pcm_t *pcm;
+	snd_kcontrol_t *kctl;
+	int i;
 	int err, nr_capt;
 
 	if ((chip == 0) || (idx < 0) || (idx > VORTEX_PCM_LAST))
@@ -520,13 +537,13 @@ static int __devinit snd_vortex_new_pcm(vortex_t * chip, int idx, int nr)
 					      0x10000, 0x10000);
 
 	if (VORTEX_PCM_TYPE(pcm) == VORTEX_PCM_SPDIF) {
-		snd_kcontrol_t *kcontrol;
-
-		if ((kcontrol =
-		     snd_ctl_new1(&vortex_spdif_kcontrol, chip)) == NULL)
+		for (i = 0; i < ARRAY_SIZE(snd_vortex_mixer_spdif); i++) {
+			kctl = snd_ctl_new1(&snd_vortex_mixer_spdif[i], chip);
+			if (!kctl)
 				return -ENOMEM;
-		if ((err = snd_ctl_add(chip->card, kcontrol)) < 0)
+			if ((err = snd_ctl_add(chip->card, kctl)) < 0)
 				return err;
 		}
+	}
 	return 0;
 }