[PATCH] aoa: tas: add missing bass/treble controls

This patch adds the bass/treble controls to snd-aoa that snd-powermac always
had for tas3004 based machines.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 134 insertions, 0 deletions

diff --git a/sound/aoa/codecs/snd-aoa-codec-tas-basstreble.h b/sound/aoa/codecs/snd-aoa-codec-tas-basstreble.h
new file mode 100644
index 00000000000..69b61136fd5
--- /dev/null
+++ b/sound/aoa/codecs/snd-aoa-codec-tas-basstreble.h
@@ -0,0 +1,134 @@
+/*
+ * This file is only included exactly once!
+ *
+ * The tables here are derived from the tas3004 datasheet,
+ * modulo typo corrections and some smoothing...
+ */
+
+#define TAS3004_TREBLE_MIN	0
+#define TAS3004_TREBLE_MAX	72
+#define TAS3004_BASS_MIN	0
+#define TAS3004_BASS_MAX	72
+#define TAS3004_TREBLE_ZERO	36
+#define TAS3004_BASS_ZERO	36
+
+static u8 tas3004_treble_table[] = {
+	150, /* -18 dB */
+	149,
+	148,
+	147,
+	146,
+	145,
+	144,
+	143,
+	142,
+	141,
+	140,
+	139,
+	138,
+	137,
+	136,
+	135,
+	134,
+	133,
+	132,
+	131,
+	130,
+	129,
+	128,
+	127,
+	126,
+	125,
+	124,
+	123,
+	122,
+	121,
+	120,
+	119,
+	118,
+	117,
+	116,
+	115,
+	114, /* 0 dB */
+	113,
+	112,
+	111,
+	109,
+	108,
+	107,
+	105,
+	104,
+	103,
+	101,
+	99,
+	98,
+	96,
+	93,
+	91,
+	89,
+	86,
+	83,
+	81,
+	77,
+	74,
+	71,
+	67,
+	63,
+	59,
+	54,
+	49,
+	44,
+	38,
+	32,
+	26,
+	19,
+	10,
+	4,
+	2,
+	1, /* +18 dB */
+};
+
+static inline u8 tas3004_treble(int idx)
+{
+	return tas3004_treble_table[idx];
+}
+
+/* I only save the difference here to the treble table
+ * so that the binary is smaller...
+ * I have also ignored completely differences of
+ * +/- 1
+ */
+static s8 tas3004_bass_diff_to_treble[] = {
+	2, /* 7 dB, offset 50 */
+	2,
+	2,
+	2,
+	2,
+	1,
+	2,
+	2,
+	2,
+	3,
+	4,
+	4,
+	5,
+	6,
+	7,
+	8,
+	9,
+	10,
+	11,
+	14,
+	13,
+	8,
+	1, /* 18 dB */
+};
+
+static inline u8 tas3004_bass(int idx)
+{
+	u8 result = tas3004_treble_table[idx];
+
+	if (idx >= 50)
+		result += tas3004_bass_diff_to_treble[idx-50];
+	return result;
+}