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rockbox/firmware/drivers/audio/wm8985.c
Rob Purchase 159f8ee41a D2: Beginnings of a WM8985 driver (based on WM8758, using EQ1 and EQ5 as HW treble/bass). Untested, but harmless. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17057 a1c6a512-1295-4272-9138-f99709370657
2008-04-09 22:20:04 +00:00

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9.1 KiB
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* 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 "logf.h"
#include "system.h"
#include "string.h"
#include "audio.h"
#include "wmcodec.h"
#include "audiohw.h"
#include "i2s.h"
/* Register addresses as per datasheet Rev.4.4 */
#define RESET 0x00
#define PWRMGMT1 0x01
#define PWRMGMT2 0x02
#define PWRMGMT3 0x03
#define AINTFCE 0x04
#define COMPAND 0x05
#define CLKGEN 0x06
#define SRATECTRL 0x07
#define GPIOCTL 0x08
#define JACKDETECT0 0x09
#define DACCTRL 0x0a
#define LDACVOL 0x0b
#define RDACVOL 0x0c
#define JACKDETECT1 0x0d
#define ADCCTL 0x0e
#define LADCVOL 0x0f
#define RADCVOL 0x10
#define EQ1 0x12
#define EQ2 0x13
#define EQ3 0x14
#define EQ4 0x15
#define EQ5 0x16
#define EQ_GAIN_MASK 0x001f
#define EQ_CUTOFF_MASK 0x0060
#define EQ_GAIN_VALUE(x) (((-x) + 12) & 0x1f)
#define EQ_CUTOFF_VALUE(x) ((((x) - 1) & 0x03) << 5)
#define CLASSDCTL 0x17
#define DACLIMIT1 0x18
#define DACLIMIT2 0x19
#define NOTCH1 0x1b
#define NOTCH2 0x1c
#define NOTCH3 0x1d
#define NOTCH4 0x1e
#define ALCCTL1 0x20
#define ALCCTL2 0x21
#define ALCCTL3 0x22
#define NOISEGATE 0x23
#define PLLN 0x24
#define PLLK1 0x25
#define PLLK2 0x26
#define PLLK3 0x27
#define THREEDCTL 0x29
#define OUT4ADC 0x2a
#define BEEPCTRL 0x2b
#define INCTRL 0x2c
#define LINPGAGAIN 0x2d
#define RINPGAGAIN 0x2e
#define LADCBOOST 0x2f
#define RADCBOOST 0x30
#define OUTCTRL 0x31
#define LOUTMIX 0x32
#define ROUTMIX 0x33
#define LOUT1VOL 0x34
#define ROUT1VOL 0x35
#define LOUT2VOL 0x36
#define ROUT2VOL 0x37
#define OUT3MIX 0x38
#define OUT4MIX 0x39
#define BIASCTL 0x3d
/* Register settings for the supported samplerates: */
#define WM8985_8000HZ 0x4d
#define WM8985_12000HZ 0x61
#define WM8985_16000HZ 0x55
#define WM8985_22050HZ 0x77
#define WM8985_24000HZ 0x79
#define WM8985_32000HZ 0x59
#define WM8985_44100HZ 0x63
#define WM8985_48000HZ 0x41
#define WM8985_88200HZ 0x7f
#define WM8985_96000HZ 0x5d
const struct sound_settings_info audiohw_settings[] = {
[SOUND_VOLUME] = {"dB", 0, 1, -58, 6, -25},
[SOUND_BASS] = {"dB", 0, 1, -12, 12, 0},
[SOUND_TREBLE] = {"dB", 0, 1, -12, 12, 0},
[SOUND_BALANCE] = {"%", 0, 1,-100, 100, 0},
[SOUND_CHANNELS] = {"", 0, 1, 0, 5, 0},
[SOUND_STEREO_WIDTH] = {"%", 0, 5, 0, 250, 100},
[SOUND_LEFT_GAIN] = {"dB", 1, 1,-128, 96, 0},
[SOUND_RIGHT_GAIN] = {"dB", 1, 1,-128, 96, 0},
[SOUND_MIC_GAIN] = {"dB", 1, 1,-128, 108, 16},
[SOUND_BASS_CUTOFF] = {"", 0, 1, 1, 4, 1},
[SOUND_TREBLE_CUTOFF] = {"", 0, 1, 1, 4, 1},
};
/* shadow registers */
unsigned int eq1_reg;
unsigned int eq5_reg;
/* convert tenth of dB volume (-57..6) to master volume register value */
int tenthdb2master(int db)
{
/* +6 to -57dB in 1dB steps == 64 levels = 6 bits */
/* 0111111 == +6dB (0x3f) = 63) */
/* 0111001 == 0dB (0x39) = 57) */
/* 0000001 == -56dB (0x01) = */
/* 0000000 == -57dB (0x00) */
/* 1000000 == Mute (0x40) */
if (db < VOLUME_MIN) {
return 0x40;
} else {
return((db/10)+57);
}
}
/* 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;
}
/* Silently enable / disable audio output */
void audiohw_enable_output(bool enable)
{
if (enable)
{
/* TODO: reset the I2S controller into known state */
//i2s_reset();
/* TODO: Review the power-up sequence to prevent pops (see datasheet) */
wmcodec_write(RESET, 0x1ff); /*Reset*/
wmcodec_write(PWRMGMT1, 0x2b);
wmcodec_write(PWRMGMT2, 0x180);
wmcodec_write(PWRMGMT3, 0x6f);
wmcodec_write(AINTFCE, 0x10);
wmcodec_write(CLKCTRL, 0x49);
wmcodec_write(OUTCTRL, 1);
/* The iPod can handle multiple frequencies, but fix at 44.1KHz
for now */
audiohw_set_sample_rate(WM8985_44100HZ);
wmcodec_write(LOUTMIX,0x1); /* Enable mixer */
wmcodec_write(ROUTMIX,0x1); /* Enable mixer */
audiohw_mute(0);
} else {
audiohw_mute(1);
}
}
void audiohw_set_master_vol(int vol_l, int vol_r)
{
/* OUT1 */
wmcodec_write(LOUT1VOL, 0x080 | vol_l);
wmcodec_write(ROUT1VOL, 0x180 | vol_r);
}
void audiohw_set_lineout_vol(int vol_l, int vol_r)
{
/* OUT2 */
wmcodec_write(LOUT2VOL, vol_l);
wmcodec_write(ROUT2VOL, 0x100 | vol_r);
}
void audiohw_set_mixer_vol(int channel1, int channel2)
{
(void)channel1;
(void)channel2;
}
void audiohw_set_bass(int value)
{
eq1_reg = (eq1_reg & ~EQ_GAIN_MASK) | EQ_GAIN_VALUE(value);
wmcodec_write(EQ1, 0x100 | eq1_reg);
}
void audiohw_set_bass_cutoff(int value)
{
eq1_reg = (eq1_reg & ~EQ_CUTOFF_MASK) | EQ_CUTOFF_VALUE(value);
wmcodec_write(EQ1, 0x100 | eq1_reg);
}
void audiohw_set_treble(int value)
{
eq5_reg = (eq5_reg & ~EQ_GAIN_MASK) | EQ_GAIN_VALUE(value);
wmcodec_write(EQ5, eq5_reg);
}
void audiohw_set_treble_cutoff(int value)
{
eq5_reg = (eq5_reg & ~EQ_CUTOFF_MASK) | EQ_CUTOFF_VALUE(value);
wmcodec_write(EQ5, eq5_reg);
}
void audiohw_mute(bool mute)
{
if (mute)
{
/* Set DACMU = 1 to soft-mute the audio DACs. */
wmcodec_write(DACCTRL, 0x40);
} else {
/* Set DACMU = 0 to soft-un-mute the audio DACs. */
wmcodec_write(DACCTRL, 0x0);
}
}
/* Nice shutdown of WM8758 codec */
void audiohw_close(void)
{
audiohw_mute(1);
wmcodec_write(PWRMGMT3, 0x0);
wmcodec_write(PWRMGMT1, 0x0);
wmcodec_write(PWRMGMT2, 0x40);
}
/* Change the order of the noise shaper, 5th order is recommended above 32kHz */
void audiohw_set_nsorder(int order)
{
(void)order;
}
/* Note: Disable output before calling this function */
void audiohw_set_sample_rate(int sampling_control)
{
/**** We force 44.1KHz for now. ****/
(void)sampling_control;
/* set clock div */
wmcodec_write(CLKCTRL, 1 | (0 << 2) | (2 << 5));
/* setup PLL for MHZ=11.2896 */
wmcodec_write(PLLN, (1 << 4) | 0x7);
wmcodec_write(PLLK1, 0x21);
wmcodec_write(PLLK2, 0x161);
wmcodec_write(PLLK3, 0x26);
/* set clock div */
wmcodec_write(CLKCTRL, 1 | (1 << 2) | (2 << 5) | (1 << 8));
/* set srate */
wmcodec_write(SRATECTRL, (0 << 1));
}
void audiohw_enable_recording(bool source_mic)
{
(void)source_mic; /* We only have a line-in (I think) */
/* TODO: reset the I2S controller into known state */
//i2s_reset();
wmcodec_write(RESET, 0x1ff); /*Reset*/
wmcodec_write(PWRMGMT1, 0x2b);
wmcodec_write(PWRMGMT2, 0x18f); /* Enable ADC - 0x0c enables left/right PGA input, and 0x03 turns on power to the ADCs */
wmcodec_write(PWRMGMT3, 0x6f);
wmcodec_write(AINTFCE, 0x10);
wmcodec_write(CLKCTRL, 0x49);
wmcodec_write(OUTCTRL, 1);
/* The iPod can handle multiple frequencies, but fix at 44.1KHz
for now */
audiohw_set_sample_rate(WM8985_44100HZ);
wmcodec_write(INCTRL,0x44); /* Connect L2 and R2 inputs */
/* Set L2/R2_2BOOSTVOL to 0db (bits 4-6) */
/* 000 = disabled
001 = -12dB
010 = -9dB
011 = -6dB
100 = -3dB
101 = 0dB
110 = 3dB
111 = 6dB
*/
wmcodec_write(LADCBOOST,0x50);
wmcodec_write(RADCBOOST,0x50);
/* Set L/R input PGA Volume to 0db */
// wm8758_write(LINPGAVOL,0x3f);
// wm8758_write(RINPGAVOL,0x13f);
/* Enable monitoring */
wmcodec_write(LOUTMIX,0x17); /* Enable output mixer - BYPL2LMIX @ 0db*/
wmcodec_write(ROUTMIX,0x17); /* Enable output mixer - BYPR2RMIX @ 0db*/
audiohw_mute(0);
}
void audiohw_disable_recording(void) {
audiohw_mute(1);
wmcodec_write(PWRMGMT3, 0x0);
wmcodec_write(PWRMGMT1, 0x0);
wmcodec_write(PWRMGMT2, 0x40);
}
void audiohw_set_recvol(int left, int right, int type) {
(void)left;
(void)right;
(void)type;
}
void audiohw_set_monitor(bool enable) {
(void)enable;
}
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