[ALSA] This patch adds support for a wavetable chip on

the BTC 1817DW board.
The QS1000 is connected through the digital input
to the Opti931 chip.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/isa/opti9xx/opti92x-ad1848.c

@@ -501,6 +501,16 @@ static int __devinit snd_opti9xx_configure(struct snd_opti9xx *chip)
 			(chip->hardware == OPTi9XX_HW_82C930 ? 0x00 : 0x04),
 			0x34);
 		snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(5), 0x20, 0xbf);
+		/* 
+		 * The BTC 1817DW has QS1000 wavetable which is connected
+		 * to the serial digital input of the OPTI931.
+		 */
+		snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(21), 0x82, 0xff);
+		/* 
+		 * This bit sets OPTI931 to automaticaly select FM
+		 * or digital input signal.
+		 */
+		snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(26), 0x01, 0x01);
 		break;
 #endif	/* OPTi93X */