Implement driver for internal codec in rk27xx (shCODlp-100.01-HD IP core from Dolphin)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30439 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 160 insertions, 0 deletions

diff --git a/firmware/drivers/audio/rk27xx_codec.c b/firmware/drivers/audio/rk27xx_codec.c
new file mode 100644
index 0000000..ebc6c47
--- /dev/null
+++ b/firmware/drivers/audio/rk27xx_codec.c
@@ -0,0 +1,160 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Driver for internal Rockchip rk27xx audio codec
+ * (shCODlp-100.01-HD IP core from Dolphin)
+ *
+ * Copyright (c) 2011 Marcin Bukat
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "kernel.h"
+#include "audio.h"
+#include "audiohw.h"
+#include "system.h"
+#include "i2c-rk27xx.h"
+
+const struct sound_settings_info audiohw_settings[] = {
+    [SOUND_VOLUME]        = {"dB", 1,  5,-335,  45,-255},
+    /* 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},
+#ifdef HAVE_RECORDING /* disabled for now */
+    [SOUND_LEFT_GAIN]     = {"dB", 2,  75, -1725, 3000, 0},
+    [SOUND_RIGHT_GAIN]    = {"dB", 2,  75, -1725, 3000, 0},
+    [SOUND_MIC_GAIN]      = {"dB", 0,   1,  0,  20,  20},
+#endif
+};
+
+/* private functions to read/write codec registers */
+static int codec_write(uint8_t reg, uint8_t val)
+{
+    return i2c_write(CODEC_I2C_ADDR, reg, 1, &val);
+}
+
+#if 0
+static int codec_read(uint8_t reg, uint8_t *val)
+{
+    return i2c_read(CODEC_I2C_ADDR, reg, 1, val);
+}
+#endif
+
+static void audiohw_mute(bool mute)
+{
+    if (mute)
+        codec_write(CR1, SB_MICBIAS|DAC_MUTE|DACSEL);
+    else
+        codec_write(CR1, SB_MICBIAS|DACSEL);
+}
+
+/* public functions */
+int tenthdb2master(int tdb)
+{
+    /* we lie here a bit and present 0.5dB gain steps
+     * but codec has 'variable' gain steps (0.5, 1.0, 2.0)
+     * depending on gain region.
+     */
+
+    if (tdb < VOLUME_MIN)
+        return 31;
+    else if (tdb < -115)
+        return -(((tdb + 115)/20) - 20); /* 2.0 dB steps */
+    else if (tdb < 5)
+        return -(((tdb + 5)/10) - 9); /* 1.0 dB steps */
+    else
+        return -((tdb - 45)/5); /* 0.5 dB steps */
+}
+
+void audiohw_preinit(void)
+{
+    /* PD7 output low */
+    GPIO_PDDR &= ~(1<<7);
+    GPIO_PDCON |= (1<<7);
+
+    codec_write(PMR2, SB_SLEEP|GIM|SB_MC);
+    codec_write(AICR, DAC_SERIAL|ADC_SERIAL|DAC_I2S|ADC_I2S);
+    codec_write(CR1, SB_MICBIAS|DAC_MUTE|DACSEL);
+    codec_write(CR2, ADC_HPF);
+    codec_write(CCR1, CRYSTAL_12M);
+    codec_write(CCR2, (FREQ44100 << 4)|FREQ44100);
+    codec_write(CRR, RATIO_8|KFAST_32|THRESHOLD_128);
+    codec_write(TR1, NOSC);
+}
+
+void audiohw_postinit(void)
+{
+    codec_write(PMR1, SB_OUT|SB_MIX|SB_ADC|SB_IN1|SB_IN2|SB_MIC|SB_IND);
+
+    udelay(10000);
+
+    codec_write(PMR2, GIM | SB_MC);
+
+    udelay(10000);
+
+    codec_write(PMR1, SB_OUT|SB_ADC|SB_IN1|SB_IN2|SB_MIC|SB_IND);
+
+    udelay(10000);
+
+    codec_write(PMR1, SB_ADC|SB_IN1|SB_IN2|SB_MIC|SB_IND);
+
+    sleep(3*HZ);
+    GPIO_PDDR |= (1<<7); /* PD7 high */
+    sleep(HZ/10);
+
+    audiohw_mute(false);
+}
+
+void audiohw_close(void)
+{
+    /* stub */
+}
+
+void audiohw_set_frequency(int fsel)
+{
+    static const unsigned char values_freq[HW_NUM_FREQ] =
+    {
+        HW_HAVE_8_([HW_FREQ_8] =   (FREQ8000<<4)|FREQ8000,)
+        HW_HAVE_11_([HW_FREQ_11] = (FREQ11025<<4)|FREQ11025,)
+        HW_HAVE_12_([HW_FREQ_12] = (FREQ12000<<4)|FREQ12000,)
+        HW_HAVE_16_([HW_FREQ_16] = (FREQ16000<<4)|FREQ16000,)
+        HW_HAVE_22_([HW_FREQ_22] = (FREQ22050<<4)|FREQ22050,)
+        HW_HAVE_24_([HW_FREQ_24] = (FREQ24000<<4)|FREQ24000,)
+        HW_HAVE_32_([HW_FREQ_32] = (FREQ32000<<4)|FREQ32000,)
+        HW_HAVE_44_([HW_FREQ_44] = (FREQ44100<<4)|FREQ44100,)
+        HW_HAVE_48_([HW_FREQ_48] = (FREQ48000<<4)|FREQ48000,)
+        HW_HAVE_96_([HW_FREQ_96] = (FREQ96000<<4)|FREQ96000,)
+    };
+
+    if ((unsigned)fsel >= HW_NUM_FREQ)
+        fsel = HW_FREQ_DEFAULT;
+
+    /* we setup the same sampling freq for DAC and ADC */
+    codec_write(CCR2, values_freq[fsel]);
+}
+
+void audiohw_set_master_vol(int vol_l, int vol_r)
+{
+    uint8_t val;
+
+    val = (uint8_t)(vol_r & 0x1f);
+    codec_write(CGR9, val);
+
+    val = (uint8_t)(vol_l & 0x1f);
+    codec_write(CGR8, val);
+}