d4afc4b9b9
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12001 a1c6a512-1295-4272-9138-f99709370657
321 lines
9.4 KiB
C
321 lines
9.4 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 "wmcodec.h"
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#include "wm8975.h"
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#include "i2s.h"
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/* use zero crossing to reduce clicks during volume changes */
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#define VOLUME_ZC_WAIT (1<<7)
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/* convert tenth of dB volume (-730..60) to master volume register value */
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int tenthdb2master(int db)
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{
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/* +6 to -73dB 1dB steps (plus mute == 80levels) 7bits */
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/* 1111111 == +6dB (0x7f) */
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/* 1111001 == 0dB (0x79) */
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/* 0110000 == -73dB (0x30 */
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/* 0101111 == mute (0x2f) */
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if (db < VOLUME_MIN) {
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return 0x0;
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} else {
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return((db/10)+73+0x30);
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}
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}
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/* convert tenth of dB volume (-780..0) to mixer volume register value */
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int tenthdb2mixer(int db)
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{
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if (db < -660) /* 1.5 dB steps */
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return (2640 - db) / 15;
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else if (db < -600) /* 0.75 dB steps */
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return (990 - db) * 2 / 15;
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else if (db < -460) /* 0.5 dB steps */
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return (460 - db) / 5;
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else /* 0.25 dB steps */
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return -db * 2 / 5;
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}
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void audiohw_reset(void);
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#define IPOD_PCM_LEVEL 0x65 /* -6dB */
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/* Silently enable / disable audio output */
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void audiohw_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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wmcodec_write(RESET, 0x1ff); /*Reset*/
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wmcodec_write(RESET, 0x0);
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/* 2. Enable Vmid and VREF. */
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wmcodec_write(PWRMGMT1, 0xc0); /*Pwr Mgmt(1)*/
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/* From app notes: allow Vref to stabilize to reduce clicks */
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sleep(HZ/4);
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/* 3. Enable DACs as required. */
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wmcodec_write(PWRMGMT2, 0x180); /*Pwr Mgmt(2)*/
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/* 4. Enable line and / or headphone output buffers as required. */
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wmcodec_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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wmcodec_write(AINTFCE, 0x42);
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/* The iPod can handle multiple frequencies, but fix at 44.1KHz for now */
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audiohw_set_sample_rate(WM8975_44100HZ);
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/* set the volume to -6dB */
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wmcodec_write(LOUT1VOL, VOLUME_ZC_WAIT | IPOD_PCM_LEVEL);
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wmcodec_write(ROUT1VOL, VOLUME_ZC_WAIT | 0x100 | IPOD_PCM_LEVEL);
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wmcodec_write(LOUTMIX1, 0x150); /* Left out Mix(def) */
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wmcodec_write(LOUTMIX2, 0x50);
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wmcodec_write(ROUTMIX1, 0x50); /* Right out Mix(def) */
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wmcodec_write(ROUTMIX2, 0x150);
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wmcodec_write(MOUTMIX1, 0x0); /* Mono out Mix */
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wmcodec_write(MOUTMIX2, 0x0);
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audiohw_mute(0);
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} else {
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audiohw_mute(1);
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}
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}
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int audiohw_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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wmcodec_write(LOUT1VOL, VOLUME_ZC_WAIT | vol_l);
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wmcodec_write(ROUT1VOL, VOLUME_ZC_WAIT | 0x100 | vol_r);
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return 0;
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}
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int audiohw_set_lineout_vol(int vol_l, int vol_r)
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{
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/* OUT2 */
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wmcodec_write(LOUT2VOL, VOLUME_ZC_WAIT | vol_l);
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wmcodec_write(ROUT2VOL, VOLUME_ZC_WAIT | 0x100 | vol_r);
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return 0;
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}
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int audiohw_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 audiohw_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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wmcodec_write(BASSCTRL, regvalues[value+6]);
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}
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}
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void audiohw_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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wmcodec_write(TREBCTRL, regvalues[value+6]);
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}
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}
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int audiohw_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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wmcodec_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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wmcodec_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 audiohw_close(void)
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{
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/* 1. Set DACMU = 1 to soft-mute the audio DACs. */
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wmcodec_write(DACCTRL, 0x8);
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/* 2. Disable all output buffers. */
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wmcodec_write(PWRMGMT2, 0x0); /*Pwr Mgmt(2)*/
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/* 3. Switch off the power supplies. */
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wmcodec_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 audiohw_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 audiohw_set_sample_rate(int sampling_control) {
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wmcodec_write(0x08, sampling_control);
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}
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void audiohw_enable_recording(bool source_mic)
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{
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(void)source_mic;
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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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wmcodec_write(0x0f, 0x1ff);
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wmcodec_write(0x0f, 0x000);
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/* 2. Enable Vmid and VREF. */
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wmcodec_write(0x19, 0xc0); /*Pwr Mgmt(1)*/
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/* 3. Enable ADCs as required. */
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wmcodec_write(0x19, 0xcc); /*Pwr Mgmt(1)*/
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wmcodec_write(0x1a, 0x180); /*Pwr Mgmt(2)*/
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/* 4. Enable line and / or headphone output buffers as required. */
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wmcodec_write(0x19, 0xfc); /*Pwr Mgmt(1)*/
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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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wmcodec_write(0x07, 0x42);
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/* The iPod can handle multiple frequencies, but fix at 44.1KHz for now */
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audiohw_set_sample_rate(WM8975_44100HZ);
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/* unmute inputs */
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wmcodec_write(0x00, 0x17); /* LINVOL (def 0dB) */
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wmcodec_write(0x01, 0x117); /* RINVOL (def 0dB) */
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wmcodec_write(0x15, 0x1d7); /* LADCVOL max vol x was ff */
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wmcodec_write(0x16, 0x1d7); /* RADCVOL max vol x was ff */
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if (source_mic) {
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/* VSEL=10(def) DATSEL=10 (use right ADC only) */
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wmcodec_write(0x17, 0xc9); /* Additional control(1) */
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/* VROI=1 (sets output resistance to 40kohms) */
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wmcodec_write(0x1b, 0x40); /* Additional control(3) */
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/* LINSEL=1 (LINPUT2) LMICBOOST=10 (20dB boost) */
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wmcodec_write(0x20, 0x60); /* ADCL signal path */
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wmcodec_write(0x21, 0x60); /* ADCR signal path */
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} else {
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/* VSEL=10(def) DATSEL=00 (left->left, right->right) */
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wmcodec_write(0x17, 0xc1); /* Additional control(1) */
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/* VROI=1 (sets output resistance to 40kohms) */
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wmcodec_write(0x1b, 0x40); /* Additional control(3) */
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/* LINSEL=0 (LINPUT1) LMICBOOST=00 (bypass boost) */
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wmcodec_write(0x20, 0x00); /* ADCL signal path */
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/* RINSEL=0 (RINPUT1) RMICBOOST=00 (bypass boost) */
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wmcodec_write(0x21, 0x00); /* ADCR signal path */
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}
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}
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void audiohw_disable_recording(void) {
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/* 1. Set DACMU = 1 to soft-mute the audio DACs. */
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wmcodec_write(0x05, 0x8);
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/* 2. Disable all output buffers. */
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wmcodec_write(0x1a, 0x0); /*Pwr Mgmt(2)*/
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/* 3. Switch off the power supplies. */
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wmcodec_write(0x19, 0x0); /*Pwr Mgmt(1)*/
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}
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void audiohw_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 audiohw_set_monitor(int enable) {
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(void)enable;
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}
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