[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 000000000000..69b61136fd54
--- /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;
+}