[ALSA] ice1724 - Add support of Chaintech AV-710

Documentation,ICE1724 driver
Add the support of Chaintech AV-710 to ice1724 driver.
The patch includes the WM-codec initialization fix by
Jaanus Kivistik <jaanus@no.spam.ee>.

Since both AV-710 and AMP Audio2000 have the same SSID, initialize
WM codecs as default for both devices.  In case it breaks Audio2000,
you can pass 'model=amp2000' option to avoid WM codec initialization.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/ice1712/amp.c b/sound/pci/ice1712/amp.c
index 7799517..289b0b5 100644
--- a/sound/pci/ice1712/amp.c
+++ b/sound/pci/ice1712/amp.c
@@ -30,16 +30,39 @@
 #include <sound/core.h>
 
 #include "ice1712.h"
+#include "envy24ht.h"
 #include "amp.h"
 
+static void wm_put(ice1712_t *ice, int reg, unsigned short val)
+{
+	unsigned short cval;
+	cval = (reg << 9) | val;
+	snd_vt1724_write_i2c(ice, WM_DEV, cval >> 8, cval & 0xff);
+}
 
 static int __devinit snd_vt1724_amp_init(ice1712_t *ice)
 {
+	static unsigned short wm_inits[] = {
+		WM_ATTEN_L,	0x0000,	/* 0 db */
+		WM_ATTEN_R,	0x0000,	/* 0 db */
+		WM_DAC_CTRL,	0x0008,	/* 24bit I2S */
+		WM_INT_CTRL,	0x0001, /* 24bit I2S */	
+	};
+
+	unsigned int i;
+
 	/* only use basic functionality for now */
 
 	ice->num_total_dacs = 2;	/* only PSDOUT0 is connected */
 	ice->num_total_adcs = 2;
 
+	/* Chaintech AV-710 has another codecs, which need initialization */
+	/* initialize WM8728 codec */
+	if (ice->eeprom.subvendor == VT1724_SUBDEVICE_AV710) {
+		for (i = 0; i < ARRAY_SIZE(wm_inits); i += 2)
+			wm_put(ice, wm_inits[i], wm_inits[i+1]);
+	}
+
 	return 0;
 }
 
@@ -54,6 +77,13 @@
 /* entry point */
 struct snd_ice1712_card_info snd_vt1724_amp_cards[] __devinitdata = {
 	{
+		.subvendor = VT1724_SUBDEVICE_AV710,
+		.name = "Chaintech AV-710",
+		.model = "av710",
+		.chip_init = snd_vt1724_amp_init,
+		.build_controls = snd_vt1724_amp_add_controls,
+	},
+	{
 		.subvendor = VT1724_SUBDEVICE_AUDIO2000,
 		.name = "AMP Ltd AUDIO2000",
 		.model = "amp2000",