473fc2ba74
Ralf Herz. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9181 a1c6a512-1295-4272-9138-f99709370657
279 lines
7.2 KiB
C
279 lines
7.2 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Driver for WM8975 audio codec
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*
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* Based on code from the ipodlinux project - http://ipodlinux.org/
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* Adapted for Rockbox in December 2005
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*
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* Original file: linux/arch/armnommu/mach-ipod/audio.c
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*
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* Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "lcd.h"
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#include "cpu.h"
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#include "kernel.h"
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#include "thread.h"
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#include "power.h"
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#include "debug.h"
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#include "system.h"
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#include "sprintf.h"
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#include "button.h"
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#include "string.h"
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#include "file.h"
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#include "buffer.h"
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#include "audio.h"
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#include "i2c-pp5020.h"
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#include "wm8975.h"
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#include "pcf50605.h"
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void wmcodec_reset(void);
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#define IPOD_PCM_LEVEL 0x65 /* -6dB */
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/*
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* Reset the I2S BIT.FORMAT I2S, 16bit, FIFO.FORMAT 32bit
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*/
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static void i2s_reset(void)
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{
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/* PP502x */
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/* I2S soft reset */
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outl(inl(0x70002800) | 0x80000000, 0x70002800);
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outl(inl(0x70002800) & ~0x80000000, 0x70002800);
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/* BIT.FORMAT [11:10] = I2S (default) */
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outl(inl(0x70002800) & ~0xc00, 0x70002800);
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/* BIT.SIZE [9:8] = 16bit (default) */
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outl(inl(0x70002800) & ~0x300, 0x70002800);
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/* FIFO.FORMAT [6:4] = 32 bit LSB */
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/* since BIT.SIZ < FIFO.FORMAT low 16 bits will be 0 */
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outl(inl(0x70002800) | 0x30, 0x70002800);
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/* RX_ATN_LVL=1 == when 12 slots full */
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/* TX_ATN_LVL=1 == when 12 slots empty */
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outl(inl(0x7000280c) | 0x33, 0x7000280c);
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/* Rx.CLR = 1, TX.CLR = 1 */
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outl(inl(0x7000280c) | 0x1100, 0x7000280c);
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}
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void wm8975_write(int reg, int data)
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{
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ipod_i2c_send(0x1a, (reg<<1) | ((data&0x100)>>8),data&0xff);
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}
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/*
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* Initialise the WM8975 for playback via headphone and line out.
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* Note, I'm using the WM8750 datasheet as its apparently close.
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*/
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int wmcodec_init(void) {
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/* reset I2C */
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i2c_init();
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/* normal outputs for CDI and I2S pin groups */
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outl(inl(0x70000020) & ~0x300, 0x70000020);
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/*mini2?*/
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outl(inl(0x70000010) & ~0x3000000, 0x70000010);
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/*mini2?*/
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/* device reset */
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outl(inl(0x60006004) | 0x800, 0x60006004);
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outl(inl(0x60006004) & ~0x800, 0x60006004);
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/* device enable */
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outl(inl(0x6000600C) | 0x807, 0x6000600C);
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/* enable external dev clock clocks */
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outl(inl(0x6000600c) | 0x2, 0x6000600c);
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/* external dev clock to 24MHz */
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outl(inl(0x70000018) & ~0xc, 0x70000018);
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return 0;
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}
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/* Silently enable / disable audio output */
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void wmcodec_enable_output(bool enable)
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{
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if (enable)
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{
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/* reset the I2S controller into known state */
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i2s_reset();
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/*
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* 1. Switch on power supplies.
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* By default the WM8750L is in Standby Mode, the DAC is
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* digitally muted and the Audio Interface, Line outputs
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* and Headphone outputs are all OFF (DACMU = 1 Power
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* Management registers 1 and 2 are all zeros).
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*/
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wm8975_write(RESET, 0x1ff); /*Reset*/
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wm8975_write(RESET, 0x0);
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/* 2. Enable Vmid and VREF. */
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wm8975_write(PWRMGMT1, 0xc0); /*Pwr Mgmt(1)*/
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/* 3. Enable DACs as required. */
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wm8975_write(PWRMGMT2, 0x180); /*Pwr Mgmt(2)*/
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/* 4. Enable line and / or headphone output buffers as required. */
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wm8975_write(PWRMGMT2, 0x1f8); /*Pwr Mgmt(2)*/
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/* BCLKINV=0(Dont invert BCLK) MS=1(Enable Master) LRSWAP=0 LRP=0 */
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/* IWL=00(16 bit) FORMAT=10(I2S format) */
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wm8975_write(AINTFCE, 0x42);
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/* The iPod can handle multiple frequencies, but fix at 44.1KHz for now */
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wmcodec_set_sample_rate(WM8975_44100HZ);
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/* set the volume to -6dB */
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wm8975_write(LOUT1VOL, IPOD_PCM_LEVEL);
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wm8975_write(ROUT1VOL,0x100 | IPOD_PCM_LEVEL);
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wm8975_write(LOUT1VOL, IPOD_PCM_LEVEL);
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wm8975_write(ROUT1VOL,0x100 | IPOD_PCM_LEVEL);
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wm8975_write(LOUTMIX1, 0x150); /* Left out Mix(def) */
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wm8975_write(LOUTMIX2, 0x50);
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wm8975_write(ROUTMIX1, 0x50); /* Right out Mix(def) */
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wm8975_write(ROUTMIX2, 0x150);
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wm8975_write(MOUTMIX1, 0x0); /* Mono out Mix */
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wm8975_write(MOUTMIX2, 0x0);
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wmcodec_mute(0);
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} else {
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wmcodec_mute(1);
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}
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}
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int wmcodec_set_master_vol(int vol_l, int vol_r)
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{
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/* +6 to -73dB 1dB steps (plus mute == 80levels) 7bits */
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/* 1111111 == +6dB */
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/* 1111001 == 0dB */
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/* 0110000 == -73dB */
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/* 0101111 == mute (0x2f) */
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/* OUT1 */
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wm8975_write(LOUT1VOL, vol_l);
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wm8975_write(ROUT1VOL, 0x100 | vol_r);
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return 0;
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}
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int wmcodec_set_lineout_vol(int vol_l, int vol_r)
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{
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/* OUT2 */
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wm8975_write(LOUT2VOL, vol_l);
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wm8975_write(ROUT2VOL, 0x100 | vol_r);
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return 0;
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}
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int wmcodec_set_mixer_vol(int channel1, int channel2)
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{
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(void)channel1;
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(void)channel2;
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return 0;
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}
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/* We are using Linear bass control */
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void wmcodec_set_bass(int value)
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{
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int regvalues[]={11, 10, 10, 9, 8, 8, 0xf , 6, 6, 5, 4, 4, 3, 2, 1, 0};
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if ((value >= -6) && (value <= 9)) {
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/* We use linear bass control with 130Hz cutoff */
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wm8975_write(BASSCTRL, regvalues[value+6]);
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}
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}
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void wmcodec_set_treble(int value)
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{
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int regvalues[]={11, 10, 10, 9, 8, 8, 0xf , 6, 6, 5, 4, 4, 3, 2, 1, 0};
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if ((value >= -6) && (value <= 9)) {
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/* We use a 8Khz cutoff */
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wm8975_write(TREBCTRL, regvalues[value+6]);
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}
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}
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int wmcodec_mute(int mute)
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{
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if (mute)
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{
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/* Set DACMU = 1 to soft-mute the audio DACs. */
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wm8975_write(DACCTRL, 0x8);
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} else {
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/* Set DACMU = 0 to soft-un-mute the audio DACs. */
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wm8975_write(DACCTRL, 0x0);
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}
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return 0;
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}
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/* Nice shutdown of WM8975 codec */
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void wmcodec_close(void)
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{
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/* 1. Set DACMU = 1 to soft-mute the audio DACs. */
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wm8975_write(DACCTRL, 0x8);
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/* 2. Disable all output buffers. */
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wm8975_write(PWRMGMT2, 0x0); /*Pwr Mgmt(2)*/
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/* 3. Switch off the power supplies. */
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wm8975_write(PWRMGMT1, 0x0); /*Pwr Mgmt(1)*/
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}
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/* Change the order of the noise shaper, 5th order is recommended above 32kHz */
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void wmcodec_set_nsorder(int order)
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{
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(void)order;
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}
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/* Note: Disable output before calling this function */
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void wmcodec_set_sample_rate(int sampling_control) {
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wm8975_write(0x08, sampling_control);
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}
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void wmcodec_enable_recording(bool source_mic) {
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(void)source_mic;
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}
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void wmcodec_disable_recording(void) {
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}
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void wmcodec_set_recvol(int left, int right, int type) {
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(void)left;
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(void)right;
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(void)type;
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}
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void wmcodec_set_monitor(int enable) {
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(void)enable;
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}
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