1 files changed, 324 insertions, 0 deletions

diff --git a/firmware/drivers/audio/wm8731.c b/firmware/drivers/audio/wm8731.c
new file mode 100644
index 0000000000..2e1a978777
--- /dev/null
+++ b/firmware/drivers/audio/wm8731.c
@@ -0,0 +1,324 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Driver for WM8731L audio codec
+ *
+ * Based on code from the ipodlinux project - http://ipodlinux.org/
+ * Adapted for Rockbox in January 2006
+ *
+ * Original file: linux/arch/armnommu/mach-ipod/audio.c
+ *
+ * Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
+ *
+ * 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 "config.h"
+#include "logf.h"
+#include "system.h"
+#include "string.h"
+#include "audio.h"
+
+#include "wmcodec.h"
+#include "audiohw.h"
+#include "i2s.h"
+
+const struct sound_settings_info audiohw_settings[] = {
+    [SOUND_VOLUME]        = {"dB", 0,  1, -74,   6, -25},
+    /* 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,  1,   0, 255, 100},
+#ifdef HAVE_RECORDING
+    [SOUND_LEFT_GAIN]     = {"dB", 1,  1,   0,  31,  23},
+    [SOUND_RIGHT_GAIN]    = {"dB", 1,  1,   0,  31,  23},
+    [SOUND_MIC_GAIN]      = {"dB", 1,  1,   0,   1,   0},
+#endif
+};
+
+/* Init values/shadows
+ * Ignore bit 8 since that only specifies "both" for updating
+ * gains */
+static unsigned char wm8731_regs[7] =
+{
+    [LINVOL]     = LINVOL_LINMUTE,
+    [RINVOL]     = RINVOL_RINMUTE,
+    [LOUTVOL]    = ROUTVOL_RZCEN,
+    [ROUTVOL]    = ROUTVOL_RZCEN,
+    [AAPCTRL]    = AAPCTRL_MUTEMIC | AAPCTRL_DACSEL,
+    [DAPCTRL]    = DAPCTRL_DACMU | DAPCTRL_DEEMP_44KHz | DAPCTRL_ADCHPD,
+    [PDCTRL]     = PDCTRL_LINEINPD | PDCTRL_MICPD | PDCTRL_ADCPD |
+                   PDCTRL_OUTPD | PDCTRL_OSCPD | PDCTRL_CLKOUTPD,
+};
+
+static void wm8731_write(int reg, unsigned val)
+{
+    wm8731_regs[reg] = (unsigned char)val;
+    wmcodec_write(reg, val);
+}
+
+static void wm8731_write_and(int reg, unsigned bits)
+{
+    wm8731_write(reg, wm8731_regs[reg] & bits);
+}
+
+static void wm8731_write_or(int reg, unsigned bits)
+{
+    wm8731_write(reg, wm8731_regs[reg] | bits);
+}
+
+/* convert tenth of dB volume (-730..60) to master volume register value */
+int tenthdb2master(int db)
+{
+    /* +6 to -73dB 1dB steps (plus mute == 80levels) 7bits */
+    /* 1111111 == +6dB  (0x7f) */
+    /* 1111001 == 0dB   (0x79) */
+    /* 0110000 == -73dB (0x30 */
+    /* 0101111 == mute  (0x2f) */
+
+    if (db < VOLUME_MIN) {
+        return 0x2f;
+    } else {
+        return((db/10)+0x30+73);
+    }
+}
+
+/* convert tenth of dB volume (-780..0) to mixer volume register value */
+int tenthdb2mixer(int db)
+{
+    if (db < -660)                 /* 1.5 dB steps */
+        return (2640 - db) / 15;
+    else if (db < -600)            /* 0.75 dB steps */
+        return (990 - db) * 2 / 15;
+    else if (db < -460)            /* 0.5 dB steps */
+        return (460 - db) / 5; 
+    else                           /* 0.25 dB steps */
+        return -db * 2 / 5;
+}
+
+int sound_val2phys(int setting, int value)
+{
+    int result;
+
+    switch(setting)
+    {
+    case SOUND_LEFT_GAIN:
+    case SOUND_RIGHT_GAIN:
+        result = (value - 23) * 15;
+        break;
+    case SOUND_MIC_GAIN:
+        result = value * 200;
+        break;
+    default:
+        result = value;
+        break;
+    }
+
+    return result;
+}
+
+void audiohw_mute(bool mute)
+{
+    if (mute) {
+        /* Set DACMU = 1 to soft-mute the audio DACs. */
+        wm8731_write_or(DAPCTRL, DAPCTRL_DACMU);
+    } else {
+        /* Set DACMU = 0 to soft-un-mute the audio DACs. */
+        wm8731_write_and(DAPCTRL, ~DAPCTRL_DACMU);
+    }
+}
+
+static void codec_set_active(int active)
+{
+    /* set active to 0x0 or 0x1 */
+    wmcodec_write(ACTIVECTRL, active ? ACTIVECTRL_ACTIVE : 0);
+}
+
+void audiohw_preinit(void)
+{
+    i2s_reset();
+
+    /* POWER UP SEQUENCE */
+    /* 1) Switch on power supplies. By default the WM8731 is in Standby Mode,
+     *    the DAC is digitally muted and the Audio Interface and Outputs are
+     *    all OFF. */
+    wmcodec_write(RESET, RESET_RESET);
+
+    /* 2) Set all required bits in the Power Down register (0Ch) to '0';
+     *    EXCEPT the OUTPD bit, this should be set to '1' (Default). */
+    wm8731_write(PDCTRL, wm8731_regs[PDCTRL]);
+
+    /* 3) Set required values in all other registers except 12h (Active). */
+    wmcodec_write(AINTFCE, AINTFCE_FORMAT_I2S | AINTFCE_IWL_16BIT |
+                           AINTFCE_MS);
+    wm8731_write(AAPCTRL, wm8731_regs[AAPCTRL]);
+    wm8731_write(DAPCTRL, wm8731_regs[DAPCTRL]);
+    wmcodec_write(SAMPCTRL, WM8731_USB24_44100HZ);
+
+    /* 5) The last write of the sequence should be setting OUTPD to '0'
+     *    (active) in register 0Ch, enabling the DAC signal path, free
+     *     of any significant power-up noise. */
+    wm8731_write_and(PDCTRL, ~PDCTRL_OUTPD);
+}
+
+void audiohw_postinit(void)
+{
+    sleep(HZ);
+
+    /* 4) Set the ‘Active’ bit in register 12h. */
+    codec_set_active(true);
+
+    audiohw_mute(false);
+
+#if defined(IRIVER_H10) || defined(IRIVER_H10_5GB)
+    /* We need to enable bit 4 of GPIOL for output for sound on H10 */
+    GPIOL_OUTPUT_VAL |= 0x10;
+#endif
+}
+
+int audiohw_set_master_vol(int vol_l, int vol_r)
+{
+    /* +6 to -73dB 1dB steps (plus mute == 80levels) 7bits */
+    /* 1111111 == +6dB */
+    /* 1111001 == 0dB */
+    /* 0110000 == -73dB */
+    /* 0101111 == mute (0x2f) */
+    wm8731_write(LOUTVOL, LOUTVOL_LZCEN | (vol_l & LOUTVOL_LHPVOL_MASK));
+    wm8731_write(ROUTVOL, ROUTVOL_RZCEN | (vol_r & ROUTVOL_RHPVOL_MASK));
+    return 0;
+}
+
+/* Nice shutdown of WM8731 codec */
+void audiohw_close(void)
+{
+    /* POWER DOWN SEQUENCE */
+    /* 1) Set the OUTPD bit to '1' (power down). */
+    wm8731_write_or(PDCTRL, PDCTRL_OUTPD);
+    /* 2) Remove the WM8731 supplies. */
+}
+
+void audiohw_set_nsorder(int order)
+{
+    static const unsigned char deemp[4] =
+    {
+        DAPCTRL_DEEMP_DISABLE,
+        DAPCTRL_DEEMP_32KHz,
+        DAPCTRL_DEEMP_44KHz,
+        DAPCTRL_DEEMP_48KHz
+    };
+
+    if ((unsigned)order >= ARRAYLEN(deemp))
+        order = 0;
+
+    wm8731_write(DAPCTRL,
+        (wm8731_regs[DAPCTRL] & ~DAPCTRL_DEEMP_MASK) | deemp[order]);
+}
+
+void audiohw_set_sample_rate(int sampling_control)
+{
+    codec_set_active(false);
+    wmcodec_write(SAMPCTRL, sampling_control);
+    codec_set_active(true);
+}
+
+void audiohw_enable_recording(bool source_mic)
+{
+    codec_set_active(false);
+    
+    wm8731_regs[PDCTRL] &= ~PDCTRL_ADCPD;
+    wm8731_regs[PDCTRL] |= PDCTRL_DACPD;
+    wm8731_regs[AAPCTRL] &= ~AAPCTRL_DACSEL;
+    
+    if (source_mic) {
+        wm8731_write_or(LINVOL, LINVOL_LINMUTE);
+        wm8731_write_or(RINVOL, RINVOL_RINMUTE);
+        wm8731_regs[PDCTRL] &= ~PDCTRL_MICPD;
+        wm8731_regs[PDCTRL] |= PDCTRL_LINEINPD;
+        wm8731_regs[AAPCTRL] |= AAPCTRL_INSEL | AAPCTRL_SIDETONE;
+        wm8731_regs[AAPCTRL] &= ~AAPCTRL_MUTEMIC;
+    } else {
+        wm8731_regs[PDCTRL] |= PDCTRL_MICPD;
+        wm8731_regs[PDCTRL] &= ~PDCTRL_LINEINPD;
+        wm8731_regs[AAPCTRL] |= AAPCTRL_MUTEMIC | AAPCTRL_BYPASS;
+        wm8731_regs[AAPCTRL] &= ~(AAPCTRL_INSEL | AAPCTRL_SIDETONE);
+    }
+
+    wm8731_write(PDCTRL, wm8731_regs[PDCTRL]);
+    wm8731_write(AAPCTRL, wm8731_regs[AAPCTRL]);
+
+    if (!source_mic) {
+        wm8731_regs[AAPCTRL] |= AAPCTRL_INSEL | AAPCTRL_SIDETONE;
+        wm8731_regs[AAPCTRL] &= ~(AAPCTRL_MUTEMIC | AAPCTRL_BYPASS);
+    } else {
+        wm8731_write_and(LINVOL, ~LINVOL_LINMUTE);
+        wm8731_write_and(RINVOL, ~RINVOL_RINMUTE);
+    }
+    
+    codec_set_active(true);
+}
+
+void audiohw_disable_recording(void)
+{
+    codec_set_active(false);
+
+    /* Mute inputs */
+    wm8731_write_or(LINVOL, LINVOL_LINMUTE);
+    wm8731_write_or(RINVOL, RINVOL_RINMUTE);
+    wm8731_write_or(AAPCTRL, AAPCTRL_MUTEMIC);
+
+    /* Turn off input analog audio paths */
+    wm8731_regs[AAPCTRL] &= ~(AAPCTRL_BYPASS | AAPCTRL_SIDETONE);
+    wm8731_write(AAPCTRL, wm8731_regs[AAPCTRL]);
+
+    /* Set power config */
+    wm8731_regs[PDCTRL] &= ~PDCTRL_DACPD;
+    wm8731_regs[PDCTRL] |= PDCTRL_MICPD | PDCTRL_LINEINPD |
+                           PDCTRL_ADCPD;
+    wm8731_write(PDCTRL, wm8731_regs[PDCTRL]);
+
+    /* Select DAC */
+    wm8731_write_or(AAPCTRL, AAPCTRL_DACSEL);
+
+    codec_set_active(true);
+}
+
+void audiohw_set_recvol(int left, int right, int type)
+{
+    switch (type)
+    {
+    case AUDIO_GAIN_MIC:
+        if (left > 0) {
+            wm8731_write_or(AAPCTRL, AAPCTRL_MIC_BOOST);
+        }
+        else {
+            wm8731_write_and(AAPCTRL, ~AAPCTRL_MIC_BOOST);
+        }
+        break;
+    case AUDIO_GAIN_LINEIN:
+        wm8731_regs[LINVOL] &= ~LINVOL_MASK;
+        wm8731_write(LINVOL, wm8731_regs[LINVOL] | (left & LINVOL_MASK));
+        wm8731_regs[RINVOL] &= ~RINVOL_MASK;
+        wm8731_write(RINVOL, wm8731_regs[RINVOL] | (right & RINVOL_MASK));
+        break;
+    default:
+        return;
+    }
+}
+
+void audiohw_set_monitor(int enable)
+{
+    /* TODO: Implement for FM monitoring */
+    (void)enable;
+}