[ALSA] Enable the analog loopback of the Revolution 5.1

Enable the analog loopback of the Revolution 5.1 card.
This patch adds support for the PT2258 volume controller and modifies
the Revolution 5.1 driver to make use of this facility.  This allows
to control the analog loopback of the card.

Signed-off-by: Jochen Voss <voss@seehuhn.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 4 insertions, 2 deletions

diff --git a/sound/pci/ice1712/revo.h b/sound/pci/ice1712/revo.h
index efbb86ec3289..c70adaf017c1 100644
--- a/sound/pci/ice1712/revo.h
+++ b/sound/pci/ice1712/revo.h
@@ -42,9 +42,11 @@ extern struct snd_ice1712_card_info snd_vt1724_revo_cards[];
 #define VT1724_REVO_CCLK        0x02
 #define VT1724_REVO_CDIN        0x04    /* not used */
 #define VT1724_REVO_CDOUT       0x08
-#define VT1724_REVO_CS0         0x10    /* AK5365 chipselect for Rev. 5.1 */
+#define VT1724_REVO_CS0         0x10    /* AK5365 chipselect for (revo51) */
 #define VT1724_REVO_CS1         0x20    /* front AKM4381 chipselect */
-#define VT1724_REVO_CS2         0x40    /* surround AKM4355 chipselect */
+#define VT1724_REVO_CS2         0x40    /* surround AKM4355 CS (revo71) */
+#define VT1724_REVO_I2C_DATA    0x40    /* I2C: PT 2258 SDA (on revo51) */
+#define VT1724_REVO_I2C_CLOCK   0x80    /* I2C: PT 2258 SCL (on revo51) */
 #define VT1724_REVO_MUTE        (1<<22) /* 0 = all mute, 1 = normal operation */
 
 #endif /* __SOUND_REVO_H */