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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Driver for WM8975 audio codec
*
* Based on code from the ipodlinux project - http://ipodlinux.org/
* Adapted for Rockbox in December 2005
*
* 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 "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 "i2c-pp5020.h"
#include "wm8975.h"
#include "pcf50605.h"
void wm8975_reset(void);
#define IPOD_PCM_LEVEL 0x65 /* -6dB */
#define RESET (0x0f<<1)
#define PWRMGMT1 (0x19<<1)
#define PWRMGMT2 (0x1a<<1)
#define AINTFCE (0x07<<1)
#define LOUT1VOL (0x02<<1)
#define ROUT1VOL (0x03<<1)
#define LOUT2VOL (0x28<<1)
#define ROUT2VOL (0x29<<1)
/*
* Reset the I2S BIT.FORMAT I2S, 16bit, FIFO.FORMAT 32bit
*/
static void i2s_reset(void)
{
/* PP502x */
/* I2S soft reset */
outl(inl(0x70002800) | 0x80000000, 0x70002800);
outl(inl(0x70002800) & ~0x80000000, 0x70002800);
/* BIT.FORMAT [11:10] = I2S (default) */
outl(inl(0x70002800) & ~0xc00, 0x70002800);
/* BIT.SIZE [9:8] = 16bit (default) */
outl(inl(0x70002800) & ~0x300, 0x70002800);
/* FIFO.FORMAT [6:4] = 32 bit LSB */
/* since BIT.SIZ < FIFO.FORMAT low 16 bits will be 0 */
outl(inl(0x70002800) | 0x30, 0x70002800);
/* RX_ATN_LVL=1 == when 12 slots full */
/* TX_ATN_LVL=1 == when 12 slots empty */
outl(inl(0x7000280c) | 0x33, 0x7000280c);
/* Rx.CLR = 1, TX.CLR = 1 */
outl(inl(0x7000280c) | 0x1100, 0x7000280c);
}
/*
* Initialise the WM8975 for playback via headphone and line out.
* Note, I'm using the WM8750 datasheet as its apparently close.
*/
int wm8975_init(void) {
/* reset I2C */
i2c_init();
/* normal outputs for CDI and I2S pin groups */
outl(inl(0x70000020) & ~0x300, 0x70000020);
/*mini2?*/
outl(inl(0x70000010) & ~0x3000000, 0x70000010);
/*mini2?*/
/* device reset */
outl(inl(0x60006004) | 0x800, 0x60006004);
outl(inl(0x60006004) & ~0x800, 0x60006004);
/* device enable */
outl(inl(0x6000600C) | 0x807, 0x6000600C);
/* enable external dev clock clocks */
outl(inl(0x6000600c) | 0x2, 0x6000600c);
/* external dev clock to 24MHz */
outl(inl(0x70000018) & ~0xc, 0x70000018);
return 0;
}
/* Silently enable / disable audio output */
void wm8975_enable_output(bool enable)
{
if (enable)
{
/* reset the I2S controller into known state */
i2s_reset();
/*
* 1. Switch on power supplies.
* By default the WM8750L is in Standby Mode, the DAC is
* digitally muted and the Audio Interface, Line outputs
* and Headphone outputs are all OFF (DACMU = 1 Power
* Management registers 1 and 2 are all zeros).
*/
ipod_i2c_send(0x1a, RESET | 1, 0xff); /*Reset*/
ipod_i2c_send(0x1a, RESET, 0x0);
/* 2. Enable Vmid and VREF. */
ipod_i2c_send(0x1a, PWRMGMT1, 0xc0); /*Pwr Mgmt(1)*/
/* 3. Enable DACs as required. */
ipod_i2c_send(0x1a, PWRMGMT2 | 0x1, 0x80); /*Pwr Mgmt(2)*/
/* 4. Enable line and / or headphone output buffers as required. */
ipod_i2c_send(0x1a, PWRMGMT2 | 0x1, 0xf8); /*Pwr Mgmt(2)*/
/* BCLKINV=0(Dont invert BCLK) MS=1(Enable Master) LRSWAP=0 LRP=0 */
/* IWL=00(16 bit) FORMAT=10(I2S format) */
ipod_i2c_send(0x1a, AINTFCE, 0x42);
/* The iPod can handle multiple frequencies, but fix at 44.1KHz for now */
wm8975_set_sample_rate(WM8975_44100HZ);
/* set the volume to -6dB */
ipod_i2c_send(0x1a, LOUT1VOL, IPOD_PCM_LEVEL);
ipod_i2c_send(0x1a, ROUT1VOL | 0x1, IPOD_PCM_LEVEL);
ipod_i2c_send(0x1a, LOUT1VOL, IPOD_PCM_LEVEL);
ipod_i2c_send(0x1a, ROUT1VOL | 0x1, IPOD_PCM_LEVEL);
ipod_i2c_send(0x1a, 0x45, 0x50); /* Left out Mix(def) */
ipod_i2c_send(0x1a, 0x46, 0x50);
ipod_i2c_send(0x1a, 0x48, 0x50); /* Right out Mix(def) */
ipod_i2c_send(0x1a, 0x4b, 0x50);
ipod_i2c_send(0x1a, 0x4c, 0x0); /* Mono out Mix */
ipod_i2c_send(0x1a, 0x4e, 0x0);
wm8975_mute(0);
} else {
wm8975_mute(1);
}
}
int wm8975_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) */
/* OUT1 */
ipod_i2c_send(0x1a, LOUT1VOL, vol_l);
ipod_i2c_send(0x1a, ROUT1VOL | 0x1, vol_r);
/* OUT2 */
ipod_i2c_send(0x1a, LOUT2VOL, vol_l);
ipod_i2c_send(0x1a, ROUT2VOL | 0x1, vol_r);
return 0;
}
int wm8975_set_mixer_vol(int channel1, int channel2)
{
(void)channel1;
(void)channel2;
return 0;
}
/* We are using Linear bass control */
void wm8975_set_bass(int value)
{
int regvalues[]={11, 10, 10, 9, 8, 8, 0xf , 6, 6, 5, 4, 4, 3, 2, 1, 0};
if ((value >= -6) && (value <= 9)) {
/* We use linear bass control with 130Hz cutoff */
ipod_i2c_send(0x1a, 0x0c << 1, regvalues[value+6]);
}
}
void wm8975_set_treble(int value)
{
int regvalues[]={11, 10, 10, 9, 8, 8, 0xf , 6, 6, 5, 4, 4, 3, 2, 1, 0};
if ((value >= -6) && (value <= 9)) {
/* We use a 8Khz cutoff */
ipod_i2c_send(0x1a, 0x0d << 1, regvalues[value+6]);
}
}
int wm8975_mute(int mute)
{
if (mute)
{
/* Set DACMU = 1 to soft-mute the audio DACs. */
ipod_i2c_send(0x1a, 0xa, 0x8);
} else {
/* Set DACMU = 0 to soft-un-mute the audio DACs. */
ipod_i2c_send(0x1a, 0xa, 0x0);
}
return 0;
}
/* Nice shutdown of WM8975 codec */
void wm8975_close(void)
{
/* 1. Set DACMU = 1 to soft-mute the audio DACs. */
ipod_i2c_send(0x1a, 0xa, 0x8);
/* 2. Disable all output buffers. */
ipod_i2c_send(0x1a, 0x34, 0x0); /*Pwr Mgmt(2)*/
/* 3. Switch off the power supplies. */
ipod_i2c_send(0x1a, 0x32, 0x0); /*Pwr Mgmt(1)*/
}
/* Change the order of the noise shaper, 5th order is recommended above 32kHz */
void wm8975_set_nsorder(int order)
{
(void)order;
}
/* Note: Disable output before calling this function */
void wm8975_set_sample_rate(int sampling_control) {
ipod_i2c_send(0x1a, 0x10, sampling_control);
}
void wm8975_enable_recording(bool source_mic) {
(void)source_mic;
}
void wm8975_disable_recording(void) {
}
void wm8975_set_recvol(int left, int right, int type) {
(void)left;
(void)right;
(void)type;
}
void wm8975_set_monitor(int enable) {
(void)enable;
}
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