From d20d9dd6e49e2663e5f943b4170193a781673e72 Mon Sep 17 00:00:00 2001
From: Jonathan Gordon <rockbox@jdgordon.info>
Date: Sun, 27 Apr 2008 13:43:05 +0000
Subject: add more registers for the tsc2100 hopefully working volume control,
 mute definatly works.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17259 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/drivers/audio/tsc2100.c | 141 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100644 firmware/drivers/audio/tsc2100.c

(limited to 'firmware/drivers/audio')

diff --git a/firmware/drivers/audio/tsc2100.c b/firmware/drivers/audio/tsc2100.c
new file mode 100644
index 0000000000..4b3bf56bd8
--- /dev/null
+++ b/firmware/drivers/audio/tsc2100.c
@@ -0,0 +1,141 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Driver for TSC2100 audio codec
+ *
+ * Copyright (c) 2008 Jonathan Gordon
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "cpu.h"
+#include "debug.h"
+#include "system.h"
+#include "audio.h"
+
+#include "audiohw.h"
+#include "tsc2100.h"
+
+const struct sound_settings_info audiohw_settings[] = {
+    [SOUND_VOLUME]        = {"dB",   0,   1, -63,   0, -25},
+#if 0
+    /* HAVE_SW_TONE_CONTROLS */
+    [SOUND_BASS]          = {"dB",   0,   1, -24,  24,   0},
+    [SOUND_TREBLE]        = {"dB",   0,   1, -24,  24,   0},
+    [SOUND_BALANCE]       = {"%",    0,   1,-100, 100,   0},
+    [SOUND_CHANNELS]      = {"",     0,   1,   0,   5,   0},
+    [SOUND_STEREO_WIDTH]  = {"%",    0,   5,   0, 250, 100},
+    [SOUND_MIC_GAIN]      = {"dB",   1,   1,   0,  39,  23},
+    [SOUND_LEFT_GAIN]     = {"dB",   1,   1,   0,  31,  23},
+    [SOUND_RIGHT_GAIN]    = {"dB",   1,   1,   0,  31,  23},
+#endif
+};
+static bool is_muted = false;
+/* convert tenth of dB volume to master volume register value */
+int tenthdb2master(int db)
+{
+    /* 0 to -63.0dB in 1dB steps, tsc2100 can goto -63.5 in 0.5dB steps */
+    if (db < VOLUME_MIN) {
+        return 0x0;
+    } else if (db >= VOLUME_MAX) {
+        return 0x1f;
+    } else {
+        return((db-VOLUME_MIN)/10); /* VOLUME_MIN is negative */
+    }
+}
+
+int sound_val2phys(int setting, int value)
+{
+    int result;
+
+    switch(setting)
+    {
+#if 0
+    case SOUND_LEFT_GAIN:
+    case SOUND_RIGHT_GAIN:
+    case SOUND_MIC_GAIN:
+        result = (value - 23) * 15;
+        break;
+#endif
+    default:
+        result = value;
+        break;
+    }
+
+    return result;
+}
+
+void audiohw_init(void)
+{
+    short val = tsc2100_readreg(TSAC4_PAGE, TSAC4_ADDRESS);
+    /* disable DAC PGA soft-stepping */
+    val |= TSAC4_DASTDP;
+    
+    tsc2100_writereg(TSAC4_PAGE, TSAC4_ADDRESS, val);
+}
+
+void audiohw_postinit(void)
+{
+}
+
+/* Silently enable / disable audio output */
+void audiohw_enable_output(bool enable)
+{
+    if (enable) {
+        audiohw_mute(0);
+    } else {
+        audiohw_mute(1);
+    }
+}
+
+void audiohw_set_master_vol(int vol_l, int vol_r)
+{
+   short vol = (vol_l<<14)|(vol_r);
+   if (is_muted)
+       vol |= (1<<15)|(1<<7);
+   tsc2100_writereg(TSDACGAIN_PAGE, TSDACGAIN_ADDRESS, vol);
+}
+
+void audiohw_set_lineout_vol(int vol_l, int vol_r)
+{
+    audiohw_set_lineout_vol(vol_l, vol_r);
+}
+
+void audiohw_mute(bool mute)
+{
+    short vol = tsc2100_readreg(TSDACGAIN_PAGE, TSDACGAIN_ADDRESS);
+    /* left  mute bit == 1<<15
+       right mute bit == 1<<7
+     */
+    if (mute) 
+    {
+        vol |= (1<<15)|(1<<7);
+    } else 
+    {
+        vol &= ~((1<<15)|(1<<7));
+    }
+    is_muted = mute;
+    tsc2100_writereg(TSDACGAIN_PAGE, TSDACGAIN_ADDRESS, vol);
+}
+
+void audiohw_close(void)
+{
+    /* mute headphones */
+    audiohw_mute(true);
+
+}
+
+void audiohw_set_sample_rate(int sampling_control)
+{
+    (void)sampling_control;
+}
-- 
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