| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Driver for WM8751 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) |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| ****************************************************************************/ |
| #include "kernel.h" |
| #include "wmcodec.h" |
| #include "i2s.h" |
| #include "audio.h" |
| #include "audiohw.h" |
| #include "system.h" |
| |
| const struct sound_settings_info audiohw_settings[] = { |
| [SOUND_VOLUME] = {"dB", 0, 1, -74, 6, -25}, |
| #ifdef USE_ADAPTIVE_BASS |
| [SOUND_BASS] = {"", 0, 1, 0, 15, 0}, |
| #else |
| [SOUND_BASS] = {"dB", 1, 15, -60, 90, 0}, |
| #endif |
| [SOUND_TREBLE] = {"dB", 1, 15, -60, 90, 0}, |
| [SOUND_BALANCE] = {"%", 0, 1,-100, 100, 0}, |
| [SOUND_CHANNELS] = {"", 0, 1, 0, 5, 0}, |
| [SOUND_STEREO_WIDTH] = {"%", 0, 5, 0, 250, 100}, |
| }; |
| |
| /* Flags used in combination with settings */ |
| |
| /* use zero crossing to reduce clicks during volume changes */ |
| #define LOUT1_BITS (LOUT1_LO1ZC) |
| /* latch left volume first then update left+right together */ |
| #define ROUT1_BITS (ROUT1_RO1ZC | ROUT1_RO1VU) |
| #define LOUT2_BITS (LOUT2_LO2ZC) |
| #define ROUT2_BITS (ROUT2_RO2ZC | ROUT2_RO2VU) |
| /* We use linear bass control with 200 Hz cutoff */ |
| #ifdef USE_ADAPTIVE_BASE |
| #define BASSCTRL_BITS (BASSCTRL_BC | BASSCTRL_BB) |
| #else |
| #define BASSCTRL_BITS (BASSCTRL_BC) |
| #endif |
| /* We use linear treble control with 4 kHz cutoff */ |
| #define TREBCTRL_BITS (TREBCTRL_TC) |
| |
| /* convert tenth of dB volume (-730..60) to master volume register value */ |
| int tenthdb2master(int db) |
| { |
| /* +6 to -73dB 1dB steps (plus mute == 80levels) 7bits */ |
| /* 1111111 == +6dB (0x7f) */ |
| /* 1111001 == 0dB (0x79) */ |
| /* 0110000 == -73dB (0x30) */ |
| /* 0101111..0000000 == mute (<= 0x2f) */ |
| if (db < VOLUME_MIN) |
| return 0x0; |
| else |
| return (db / 10) + 73 + 0x30; |
| } |
| |
| static int tone_tenthdb2hw(int value) |
| { |
| /* -6.0db..+0db..+9.0db step 1.5db - translate -60..+0..+90 step 15 |
| to 10..6..0 step -1. |
| */ |
| value = 10 - (value + 60) / 15; |
| |
| if (value == 6) |
| value = 0xf; /* 0db -> off */ |
| |
| return value; |
| } |
| |
| |
| #ifdef USE_ADAPTIVE_BASS |
| static int adaptivebass2hw(int value) |
| { |
| /* 0 to 15 step 1 - step -1 0 = off is a 15 in the register */ |
| value = 15 - value; |
| |
| return value; |
| } |
| #endif |
| |
| /* Reset and power up the WM8751 */ |
| void audiohw_preinit(void) |
| { |
| #ifdef MROBE_100 |
| /* controls headphone ouput */ |
| GPIOL_ENABLE |= 0x10; |
| GPIOL_OUTPUT_EN |= 0x10; |
| GPIOL_OUTPUT_VAL |= 0x10; /* disable */ |
| #endif |
| |
| #ifdef CPU_PP502x |
| i2s_reset(); |
| #endif |
| |
| /* |
| * 1. Switch on power supplies. |
| * By default the WM8751 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). |
| */ |
| wmcodec_write(RESET, RESET_RESET); /*Reset*/ |
| |
| /* 2. Enable Vmid and VREF. */ |
| wmcodec_write(PWRMGMT1, PWRMGMT1_VREF | PWRMGMT1_VMIDSEL_5K); |
| |
| /* BCLKINV=0(Dont invert BCLK) MS=1(Enable Master) LRSWAP=0 LRP=0 */ |
| /* IWL=00(16 bit) FORMAT=10(I2S format) */ |
| wmcodec_write(AINTFCE, AINTFCE_MS | AINTFCE_WL_16 | |
| AINTFCE_FORMAT_I2S); |
| } |
| |
| /* Enable DACs and audio output after a short delay */ |
| void audiohw_postinit(void) |
| { |
| /* From app notes: allow Vref to stabilize to reduce clicks */ |
| sleep(HZ); |
| |
| /* 3. Enable DACs as required. */ |
| wmcodec_write(PWRMGMT2, PWRMGMT2_DACL | PWRMGMT2_DACR); |
| |
| /* 4. Enable line and / or headphone output buffers as required. */ |
| #ifdef MROBE_100 |
| wmcodec_write(PWRMGMT2, PWRMGMT2_DACL | PWRMGMT2_DACR | |
| PWRMGMT2_LOUT1 | PWRMGMT2_ROUT1); |
| #else |
| wmcodec_write(PWRMGMT2, PWRMGMT2_DACL | PWRMGMT2_DACR | |
| PWRMGMT2_LOUT1 | PWRMGMT2_ROUT1 | PWRMGMT2_LOUT2 | |
| PWRMGMT2_ROUT2); |
| #endif |
| |
| wmcodec_write(ADDITIONAL1, ADDITIONAL1_TSDEN | ADDITIONAL1_TOEN | |
| ADDITIONAL1_DMONOMIX_LLRR | ADDITIONAL1_VSEL_DEFAULT); |
| |
| wmcodec_write(LEFTMIX1, LEFTMIX1_LD2LO | LEFTMIX1_LI2LO_DEFAULT); |
| wmcodec_write(RIGHTMIX2, RIGHTMIX2_RD2RO | RIGHTMIX2_RI2RO_DEFAULT); |
| |
| audiohw_mute(false); |
| |
| #ifdef MROBE_100 |
| /* enable headphone output */ |
| GPIOL_OUTPUT_VAL &= ~0x10; |
| GPIOL_OUTPUT_EN |= 0x10; |
| #endif |
| } |
| |
| void audiohw_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) */ |
| |
| wmcodec_write(LOUT1, LOUT1_BITS | LOUT1_LOUT1VOL(vol_l)); |
| wmcodec_write(ROUT1, ROUT1_BITS | ROUT1_ROUT1VOL(vol_r)); |
| } |
| |
| #ifndef MROBE_100 |
| void audiohw_set_lineout_vol(int vol_l, int vol_r) |
| { |
| wmcodec_write(LOUT2, LOUT2_BITS | LOUT2_LOUT2VOL(vol_l)); |
| wmcodec_write(ROUT2, ROUT2_BITS | ROUT2_ROUT2VOL(vol_r)); |
| } |
| #endif |
| |
| void audiohw_set_bass(int value) |
| { |
| wmcodec_write(BASSCTRL, BASSCTRL_BITS | |
| |
| #ifdef USE_ADAPTIVE_BASS |
| BASSCTRL_BASS(adaptivebass2hw(value))); |
| #else |
| BASSCTRL_BASS(tone_tenthdb2hw(value))); |
| #endif |
| } |
| |
| void audiohw_set_treble(int value) |
| { |
| wmcodec_write(TREBCTRL, TREBCTRL_BITS | |
| TREBCTRL_TREB(tone_tenthdb2hw(value))); |
| } |
| |
| void audiohw_mute(bool mute) |
| { |
| /* Mute: Set DACMU = 1 to soft-mute the audio DACs. */ |
| /* Unmute: Set DACMU = 0 to soft-un-mute the audio DACs. */ |
| wmcodec_write(DACCTRL, mute ? DACCTRL_DACMU : 0); |
| } |
| |
| /* Nice shutdown of WM8751 codec */ |
| void audiohw_close(void) |
| { |
| /* 1. Set DACMU = 1 to soft-mute the audio DACs. */ |
| audiohw_mute(true); |
| |
| /* 2. Disable all output buffers. */ |
| wmcodec_write(PWRMGMT2, 0x0); |
| |
| /* 3. Switch off the power supplies. */ |
| wmcodec_write(PWRMGMT1, 0x0); |
| } |
| |
| /* Note: Disable output before calling this function */ |
| void audiohw_set_frequency(int fsel) |
| { |
| wmcodec_write(CLOCKING, fsel); |
| } |