340 lines
10 KiB
C
340 lines
10 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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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 "logf.h"
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#include "system.h"
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#include "kernel.h"
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#include "string.h"
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#include "audio.h"
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#include "sound.h"
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#include "wmcodec.h"
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#include "audiohw.h"
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static unsigned short wm8975_regs[WM8975_NUM_REGISTERS] =
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{
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[LINVOL] = LINVOL_LZCEN | 23, /* 0dB */
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[RINVOL] = RINVOL_RIVU | RINVOL_RZCEN | 23, /* 0dB */
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[DAPCTRL] = DAPCTRL_DACMU,
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/* This reduces the popping noise during codec powerup
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noticably, especially with high-impedance loads.
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We might want to change this for all targets,
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but it has only been tested on iPod Nano 2G so far. */
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#ifdef IPOD_NANO2G
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[PWRMGMT1] = PWRMGMT1_VMIDSEL_500K | PWRMGMT1_VREF,
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#else
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[PWRMGMT1] = PWRMGMT1_VMIDSEL_5K | PWRMGMT1_VREF,
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#endif
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[PWRMGMT2] = PWRMGMT2_DACL | PWRMGMT2_DACR | PWRMGMT2_LOUT1
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| PWRMGMT2_ROUT1 | PWRMGMT2_LOUT2 | PWRMGMT2_ROUT2,
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};
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static void wm8975_write(int reg, unsigned val)
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{
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if (WM8975_NUM_REGISTERS > reg) {
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wm8975_regs[reg] = val;
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wmcodec_write(reg, val);
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}
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}
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static void wm8975_write_and(int reg, unsigned bits)
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{
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wm8975_write(reg, wm8975_regs[reg] & bits);
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}
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static void wm8975_write_or(int reg, unsigned bits)
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{
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wm8975_write(reg, wm8975_regs[reg] | bits);
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}
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/* convert tenth of dB volume (-730..60) to master volume register value */
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static int vol_tenthdb2hw(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..0000000 == mute (0x2f) */
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if (db <= -740) {
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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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static void audiohw_mute(bool mute)
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{
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if (mute) {
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/* Set DACMU = 1 to soft-mute the audio DACs. */
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wm8975_write_or(DAPCTRL, DAPCTRL_DACMU);
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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_and(DAPCTRL, ~DAPCTRL_DACMU);
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}
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}
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#define IPOD_PCM_LEVEL 0x65 /* -6dB */
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/* This reduces the popping noise during codec powerup
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noticably, especially with high-impedance loads.
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We might want to change this for all targets,
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but it has only been tested on iPod Nano 2G so far. */
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#ifdef IPOD_NANO2G
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void audiohw_preinit(void)
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{
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wm8975_write(RESET, RESET_RESET);
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wm8975_write(AINTFCE, AINTFCE_MS | AINTFCE_LRP_I2S_RLO
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| AINTFCE_IWL_16BIT | AINTFCE_FORMAT_I2S);
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wm8975_write(LOUTMIX1, LOUTMIX1_LD2LO | LOUTMIX1_LI2LOVOL(5));
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wm8975_write(ROUTMIX2, ROUTMIX2_RD2RO | ROUTMIX2_RI2ROVOL(5));
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wm8975_write(PWRMGMT1, wm8975_regs[PWRMGMT1]);
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wm8975_write(PWRMGMT2, wm8975_regs[PWRMGMT2]);
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}
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void audiohw_postinit(void)
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{
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wm8975_regs[PWRMGMT1] &= ~PWRMGMT1_VMIDSEL_MASK;
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wm8975_regs[PWRMGMT1] |= PWRMGMT1_VMIDSEL_50K;
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wm8975_write(PWRMGMT1, wm8975_regs[PWRMGMT1]);
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audiohw_mute(false);
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}
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#else /* !IPOD_NANO2G */
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void audiohw_preinit(void)
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{
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/* POWER UP SEQUENCE */
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wm8975_write(RESET, RESET_RESET);
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/* 2. Enable Vmid and VREF, quick startup. */
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wm8975_write(PWRMGMT1, wm8975_regs[PWRMGMT1]);
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sleep(HZ/50);
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wm8975_regs[PWRMGMT1] &= ~PWRMGMT1_VMIDSEL_MASK;
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wm8975_write(PWRMGMT1, wm8975_regs[PWRMGMT1] | PWRMGMT1_VMIDSEL_50K);
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/* 4. Enable DACs, line and headphone output buffers as required. */
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wm8975_write(PWRMGMT2, wm8975_regs[PWRMGMT2]);
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wm8975_write(AINTFCE, AINTFCE_MS | AINTFCE_LRP_I2S_RLO
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| AINTFCE_IWL_16BIT | AINTFCE_FORMAT_I2S);
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wm8975_write(DAPCTRL, wm8975_regs[DAPCTRL] );
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/* Set sample rate. */
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wm8975_write(SAMPCTRL, WM8975_44100HZ);
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/* set the volume to -6dB */
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wm8975_write(LOUT1VOL, LOUT1VOL_LO1ZC | IPOD_PCM_LEVEL);
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wm8975_write(ROUT1VOL, ROUT1VOL_RO1VU | ROUT1VOL_RO1ZC | IPOD_PCM_LEVEL);
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wm8975_write(LOUTMIX1, LOUTMIX1_LD2LO| LOUTMIX1_LI2LOVOL(5));
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wm8975_write(LOUTMIX2, LOUTMIX2_RI2LOVOL(5));
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wm8975_write(ROUTMIX1, ROUTMIX1_LI2ROVOL(5));
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wm8975_write(ROUTMIX2, ROUTMIX2_RD2RO| ROUTMIX2_RI2ROVOL(5));
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wm8975_write(MOUTMIX1, 0);
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wm8975_write(MOUTMIX2, 0);
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}
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void audiohw_postinit(void)
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{
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audiohw_mute(false);
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}
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#endif
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void audiohw_set_volume(int vol_l, int vol_r)
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{
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vol_l = vol_tenthdb2hw(vol_l);
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vol_r = vol_tenthdb2hw(vol_r);
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/* OUT1 */
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wm8975_write(LOUT1VOL, LOUT1VOL_LO1ZC | vol_l);
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wm8975_write(ROUT1VOL, ROUT1VOL_RO1VU | ROUT1VOL_RO1ZC | vol_r);
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}
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void audiohw_set_lineout_volume(int vol_l, int vol_r)
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{
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vol_l = vol_tenthdb2hw(vol_l);
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vol_r = vol_tenthdb2hw(vol_r);
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/* OUT2 */
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wm8975_write(LOUT2VOL, LOUT2VOL_LO2ZC | vol_l);
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wm8975_write(ROUT2VOL, ROUT2VOL_RO2VU | ROUT2VOL_RO2ZC | vol_r);
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}
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void audiohw_enable_lineout(bool enable)
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{
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if (enable) {
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/* Enable lineout */
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wm8975_regs[PWRMGMT2] |= (PWRMGMT2_LOUT2 | PWRMGMT2_ROUT2);
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} else {
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/* Disable lineout */
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wm8975_regs[PWRMGMT2] &= ~(PWRMGMT2_LOUT2 | PWRMGMT2_ROUT2);
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}
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wm8975_write(PWRMGMT2, wm8975_regs[PWRMGMT2]);
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}
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void audiohw_set_bass(int value)
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{
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const int regvalues[] = {
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11, 10, 10, 9, 8, 8, 0xf, 6, 6, 5, 4, 4, 3, 2, 2, 1
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};
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if ((value >= -6) && (value <= 9)) {
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/* We use linear bass control with 200 Hz cutoff */
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wm8975_write(BASSCTRL, regvalues[value + 6] | BASSCTRL_BC);
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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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const int regvalues[] = {
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11, 10, 10, 9, 8, 8, 0xf, 6, 6, 5, 4, 4, 3, 2, 2, 1
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};
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if ((value >= -6) && (value <= 9)) {
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/* We use linear treble control with 4 kHz cutoff */
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wm8975_write(TREBCTRL, regvalues[value + 6] | TREBCTRL_TC);
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}
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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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audiohw_mute(true);
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/* 2. Disable all output buffers. */
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wm8975_write(PWRMGMT2, 0x0);
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/* 3. Switch off the power supplies. */
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wm8975_write(PWRMGMT1, 0x0);
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}
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/* Note: Disable output before calling this function */
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void audiohw_set_frequency(int fsel)
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{
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(void)fsel;
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}
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#ifdef HAVE_RECORDING
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void audiohw_enable_recording(bool source_mic)
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{
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wm8975_regs[PWRMGMT1] |= PWRMGMT1_AINL | PWRMGMT1_AINR
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| PWRMGMT1_ADCL | PWRMGMT1_ADCR;
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wm8975_write(PWRMGMT1, wm8975_regs[PWRMGMT1]);
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/* NOTE: When switching to digital monitoring we will not want
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* the DACs disabled. Also the outputs shouldn't be disabled
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* when recording from line in (dock connector) - needs testing. */
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wm8975_regs[PWRMGMT2] &= ~(PWRMGMT2_LOUT1 | PWRMGMT2_ROUT1
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| PWRMGMT2_LOUT2 | PWRMGMT2_ROUT2);
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wm8975_write(PWRMGMT2, wm8975_regs[PWRMGMT2]);
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wm8975_write_or(LINVOL, LINVOL_LINMUTE);
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wm8975_write_or(RINVOL, RINVOL_RINMUTE);
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wm8975_write(ADDCTRL3, ADDCTRL3_VROI);
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if (source_mic) {
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wm8975_write(ADDCTRL1, ADDCTRL1_VSEL_LOWBIAS | ADDCTRL1_DATSEL_RADC
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| ADDCTRL1_TOEN);
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wm8975_write(ADCLPATH, 0);
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wm8975_write(ADCRPATH, ADCRPATH_RINSEL_RIN2 | ADCRPATH_RMICBOOST_20dB);
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} else {
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wm8975_write(ADDCTRL1, ADDCTRL1_VSEL_LOWBIAS | ADDCTRL1_DATSEL_NORMAL
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| ADDCTRL1_TOEN);
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wm8975_write(ADCLPATH, ADCLPATH_LINSEL_LIN1 | ADCLPATH_LMICBOOST_OFF);
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wm8975_write(ADCRPATH, ADCRPATH_RINSEL_RIN1 | ADCRPATH_RMICBOOST_OFF);
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}
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wm8975_write_and(LINVOL, ~LINVOL_LINMUTE);
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wm8975_write_and(RINVOL, ~RINVOL_RINMUTE);
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}
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void audiohw_disable_recording(void)
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{
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/* mute inputs */
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wm8975_write_or(LINVOL, LINVOL_LINMUTE);
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wm8975_write_or(RINVOL, RINVOL_RINMUTE);
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wm8975_write(ADDCTRL3, 0);
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wm8975_regs[PWRMGMT2] |= PWRMGMT2_DACL | PWRMGMT2_DACR
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| PWRMGMT2_LOUT1 | PWRMGMT2_ROUT1
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| PWRMGMT2_LOUT2 | PWRMGMT2_ROUT2;
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wm8975_write(PWRMGMT2, wm8975_regs[PWRMGMT2]);
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wm8975_regs[PWRMGMT1] &= ~(PWRMGMT1_AINL | PWRMGMT1_AINR
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| PWRMGMT1_ADCL | PWRMGMT1_ADCR);
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wm8975_write(PWRMGMT1, wm8975_regs[PWRMGMT1]);
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}
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/* volume in 0 .. 63, corresponds to -17.25dB .. 30dB in steps of 0.75dB
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* microphone has an extra 20dB boost so 0 .. 63 corresponds to 2.75dB .. 50dB */
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void audiohw_set_recvol(int left, int right, int type)
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{
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switch (type)
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{
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case AUDIO_GAIN_MIC: /* Mic uses right ADC */
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wm8975_regs[RINVOL] &= ~RINVOL_MASK;
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wm8975_write_or(RINVOL, left & RINVOL_MASK);
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break;
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case AUDIO_GAIN_LINEIN:
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wm8975_regs[LINVOL] &= ~LINVOL_MASK;
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wm8975_write_or(LINVOL, left & LINVOL_MASK);
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wm8975_regs[RINVOL] &= ~RINVOL_MASK;
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wm8975_write_or(RINVOL, right & RINVOL_MASK);
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break;
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default:
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return;
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}
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}
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void audiohw_set_monitor(bool enable)
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{
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if (enable) {
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/* set volume to 0 dB */
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wm8975_regs[LOUTMIX1] &= ~LOUTMIX1_LI2LOVOL_MASK;
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wm8975_regs[LOUTMIX1] |= LOUTMIX1_LI2LOVOL(2);
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wm8975_regs[ROUTMIX2] &= ~ROUTMIX2_RI2ROVOL_MASK;
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wm8975_regs[ROUTMIX2] |= ROUTMIX2_RI2ROVOL(2);
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/* set mux to line input */
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wm8975_write_and(LOUTMIX1, ~LOUTMIX1_LMIXSEL_MASK);
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wm8975_write_and(ROUTMIX1, ~ROUTMIX1_RMIXSEL_MASK);
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/* enable bypass */
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wm8975_write_or(LOUTMIX1, LOUTMIX1_LI2LO);
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wm8975_write_or(ROUTMIX2, ROUTMIX2_RI2RO);
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} else {
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/* disable bypass */
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wm8975_write_and(LOUTMIX1, ~LOUTMIX1_LI2LO);
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wm8975_write_and(ROUTMIX2, ~ROUTMIX2_RI2RO);
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}
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}
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#endif /* HAVE_RECORDING */
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