Sound for Sansa E200 - based on work by myself, Rene Peinthor, Barry Wardell and Christian Gmeiner from the AS3514 datasheet.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12727 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 229 insertions, 0 deletions

diff --git a/firmware/drivers/as3514.c b/firmware/drivers/as3514.c
new file mode 100644
index 0000000000..23d53a634e
--- /dev/null
+++ b/firmware/drivers/as3514.c
@@ -0,0 +1,229 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Driver for AS3514 audio codec
+ *
+ * Copyright (c) 2007 Daniel Ankers
+ *
+ * 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 "lcd.h"
+#include "cpu.h"
+#include "kernel.h"
+#include "thread.h"
+#include "power.h"
+#include "debug.h"
+#include "system.h"
+#include "sprintf.h"
+#include "button.h"
+#include "string.h"
+#include "file.h"
+#include "buffer.h"
+#include "audio.h"
+#include "backlight.h"
+
+#include "as3514.h"
+#include "i2s.h"
+#include "i2c-pp.h"
+
+/* convert tenth of dB volume to master volume register value */
+int tenthdb2master(int db)
+{
+    /* +1..07 to -45.43dB in 1.5dB steps == 32 levels = 5 bits */
+    /* 11111 == +1.07dB  (0x1f) = 31) */
+    /* 11110 == -0.43dB  (0x1e) = 30) */
+    /* 00001 == -43.93dB (0x01) */
+    /* 00000 == -45.43dB (0x00) */
+
+    if (db < VOLUME_MIN) {
+        return 0x0;
+    } else if (db >= VOLUME_MAX) {
+        return 0x1f;
+    } else {
+        return((db-VOLUME_MIN)/15); /* VOLUME_MIN is negative */
+    }
+}
+
+/* convert tenth of dB volume (-405..60) to mixer volume register value */
+int tenthdb2mixer(int db)
+{
+    /* FIXME: Make this sensible */
+    if (db < -405) {
+        return 0x0;
+    } else if (db >= 60) {
+        return 0x1f;
+    } else {
+        return((db+405)/15);
+    }
+}
+
+void audiohw_reset(void);
+
+/*
+ * Initialise the PP I2C and I2S.
+ */
+int audiohw_init(void) {
+    /* reset I2C */
+    i2c_init();
+
+    /* normal outputs for CDI and I2S pin groups */
+    DEV_INIT &= ~0x300;
+
+    /*mini2?*/
+    outl(inl(0x70000010) & ~0x3000000, 0x70000010);
+    /*mini2?*/
+
+    /* device reset */
+    DEV_RS |= 0x800;
+    DEV_RS &=~0x800;
+
+    /* device enable */
+    DEV_EN |= 0x807;
+
+    /* enable external dev clock clocks */
+    DEV_EN |= 0x2;
+
+    /* external dev clock to 24MHz */
+    outl(inl(0x70000018) & ~0xc, 0x70000018);
+
+    i2s_reset();
+
+    /* Set ADC off, mixer on, DAC on, line out off, line in off, mic off */
+    pp_i2c_send(AS3514_I2C_ADDR, AUDIOSET1, 0x60); /* Turn on DAC and mixer */
+    pp_i2c_send(AS3514_I2C_ADDR, PLLMODE, 0x04);
+    pp_i2c_send(AS3514_I2C_ADDR, DAC_L, 0x50); /* DAC mute off, -16.5dB gain */
+    pp_i2c_send(AS3514_I2C_ADDR, DAC_R, 0x10); /* DAC -16.5dB gain to prevent overloading
+                                       the headphone amp */
+    return 0;
+}
+
+void audiohw_postinit(void)
+{
+}
+
+/* Silently enable / disable audio output */
+void audiohw_enable_output(bool enable)
+{
+    if (enable)
+    {
+        /* reset the I2S controller into known state */
+        i2s_reset();
+
+        pp_i2c_send(AS3514_I2C_ADDR, HPH_OUT_L, 0xc0); /* Mute on, power on */
+        audiohw_mute(0);
+    } else {
+        audiohw_mute(1);
+        pp_i2c_send(AS3514_I2C_ADDR, HPH_OUT_L, 0x80); /* Mute on, power off */
+    }
+}
+
+int audiohw_set_master_vol(int vol_l, int vol_r)
+{
+    vol_l &= 0x1f;
+    vol_r &= 0x1f;
+    pp_i2c_send(AS3514_I2C_ADDR, HPH_OUT_R, 0x40 | vol_r);
+    pp_i2c_send(AS3514_I2C_ADDR, HPH_OUT_L, 0x40 | vol_l);
+
+    return 0;
+}
+
+int audiohw_set_lineout_vol(int vol_l, int vol_r)
+{
+    pp_i2c_send(AS3514_I2C_ADDR, LINE_OUT_R, 0x40 | vol_r);
+    pp_i2c_send(AS3514_I2C_ADDR, LINE_OUT_L, 0x40 | vol_l);
+
+    return 0;
+}
+
+int audiohw_set_mixer_vol(int channel1, int channel2)
+{
+    (void)channel1;
+    (void)channel2;
+
+    return 0;
+}
+
+/* We are using Linear bass control */
+void audiohw_set_bass(int value)
+{
+    (void)value;
+}
+
+void audiohw_set_treble(int value)
+{
+    (void)value;
+}
+
+int audiohw_mute(int mute)
+{
+    int curr;
+
+    curr = i2c_readbyte(AS3514_I2C_ADDR, HPH_OUT_L);
+    if (mute)
+    {
+        pp_i2c_send(AS3514_I2C_ADDR, HPH_OUT_L, curr | 0x80);
+    } else {
+        pp_i2c_send(AS3514_I2C_ADDR, HPH_OUT_L, curr & ~(0x80));
+    }
+
+    return 0;
+}
+
+/* Nice shutdown of WM8758 codec */
+void audiohw_close(void)
+{
+    audiohw_mute(1);
+}
+
+/* Change the order of the noise shaper, 5th order is recommended above 32kHz */
+void audiohw_set_nsorder(int order)
+{
+    (void)order;
+}
+
+void audiohw_set_sample_rate(int sampling_control)
+{
+    (void)sampling_control;
+    /* TODO: Implement this by adjusting the I2S Master clock */
+}
+
+void audiohw_enable_recording(bool source_mic)
+{
+    (void)source_mic;
+    /* TODO */
+}
+
+void audiohw_disable_recording(void) {
+    /* TODO */
+}
+
+void audiohw_set_recvol(int left, int right, int type) {
+
+    (void)left;
+    (void)right;
+    (void)type;
+}
+
+void audiohw_set_monitor(int enable) {
+
+    (void)enable;
+}
+
+void audiohw_set_equalizer_band(int band, int freq, int bw, int gain)
+{
+    (void)band;
+    (void)freq;
+    (void)bw;
+    (void)gain;
+}