/*************************************************************************** * __________ __ ___. * 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) * * 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 "kernel.h" #include "wmcodec.h" #include "i2s.h" #include "audio.h" #include "audiohw.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; } /* convert tenth of dB volume (-780..0) to mixer volume register value */ int tenthdb2mixer(int db) { (void)db; return 0; } 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) { /* * 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. */ wmcodec_write(PWRMGMT2, PWRMGMT2_DACL | PWRMGMT2_DACR | PWRMGMT2_LOUT1 | PWRMGMT2_ROUT1 | PWRMGMT2_LOUT2 | PWRMGMT2_ROUT2); 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); } int 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)); return 0; } int 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)); return 0; } int audiohw_set_mixer_vol(int channel1, int channel2) { (void)channel1; (void)channel2; return 0; } 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); }