/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Driver for WM8758 audio codec - based on datasheet for WM8983 * * 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 "lcd.h" #include "cpu.h" #include "kernel.h" #include "thread.h" #include "power.h" #include "debug.h" #include "system.h" #include "sprintf.h" #include "button.h" #include "string.h" #include "file.h" #include "buffer.h" #include "audio.h" #include "wmcodec.h" #include "wm8758.h" #include "i2s.h" /* convert tenth of dB volume (-57..6) to master volume register value */ int tenthdb2master(int db) { /* +6 to -57dB in 1dB steps == 64 levels = 6 bits */ /* 0111111 == +6dB (0x3f) = 63) */ /* 0111001 == 0dB (0x39) = 57) */ /* 0000001 == -56dB (0x01) = */ /* 0000000 == -57dB (0x00) */ /* 1000000 == Mute (0x40) */ if (db < VOLUME_MIN) { return 0x40; } else { return((db/10)+57); } } /* convert tenth of dB volume (-780..0) to mixer volume register value */ int tenthdb2mixer(int db) { if (db < -660) /* 1.5 dB steps */ return (2640 - db) / 15; else if (db < -600) /* 0.75 dB steps */ return (990 - db) * 2 / 15; else if (db < -460) /* 0.5 dB steps */ return (460 - db) / 5; else /* 0.25 dB steps */ return -db * 2 / 5; } void audiohw_reset(void); #define IPOD_PCM_LEVEL 0x65 /* -6dB */ //#define BASSCTRL 0x //#define TREBCTRL 0x0b /* Silently enable / disable audio output */ void audiohw_enable_output(bool enable) { if (enable) { /* reset the I2S controller into known state */ i2s_reset(); /* TODO: Review the power-up sequence to prevent pops */ wmcodec_write(RESET, 0x1ff); /*Reset*/ wmcodec_write(PWRMGMT1, 0x2b); wmcodec_write(PWRMGMT2, 0x180); wmcodec_write(PWRMGMT3, 0x6f); wmcodec_write(AINTFCE, 0x10); wmcodec_write(CLKCTRL, 0x49); wmcodec_write(OUTCTRL, 1); /* The iPod can handle multiple frequencies, but fix at 44.1KHz for now */ audiohw_set_sample_rate(WM8758_44100HZ); wmcodec_write(LOUTMIX,0x1); /* Enable mixer */ wmcodec_write(ROUTMIX,0x1); /* Enable mixer */ audiohw_mute(0); } else { audiohw_mute(1); } } int audiohw_set_master_vol(int vol_l, int vol_r) { /* OUT1 */ wmcodec_write(LOUT1VOL, 0x080 | vol_l); wmcodec_write(ROUT1VOL, 0x180 | vol_r); return 0; } int audiohw_set_lineout_vol(int vol_l, int vol_r) { /* OUT2 */ wmcodec_write(LOUT2VOL, vol_l); wmcodec_write(ROUT2VOL, 0x100 | vol_r); return 0; } int audiohw_set_mixer_vol(int channel1, int channel2) { (void)channel1; (void)channel2; return 0; } /* We are using Linear bass control */ void audiohw_set_bass(int value) { (void)value; } void audiohw_set_treble(int value) { (void)value; } int audiohw_mute(int mute) { if (mute) { /* Set DACMU = 1 to soft-mute the audio DACs. */ wmcodec_write(DACCTRL, 0x40); } else { /* Set DACMU = 0 to soft-un-mute the audio DACs. */ wmcodec_write(DACCTRL, 0x0); } return 0; } /* Nice shutdown of WM8758 codec */ void audiohw_close(void) { audiohw_mute(1); wmcodec_write(PWRMGMT3, 0x0); wmcodec_write(PWRMGMT1, 0x0); wmcodec_write(PWRMGMT2, 0x40); } /* Change the order of the noise shaper, 5th order is recommended above 32kHz */ void audiohw_set_nsorder(int order) { (void)order; } /* Note: Disable output before calling this function */ void audiohw_set_sample_rate(int sampling_control) { /**** We force 44.1KHz for now. ****/ (void)sampling_control; /* set clock div */ wmcodec_write(CLKCTRL, 1 | (0 << 2) | (2 << 5)); /* setup PLL for MHZ=11.2896 */ wmcodec_write(PLLN, (1 << 4) | 0x7); wmcodec_write(PLLK1, 0x21); wmcodec_write(PLLK2, 0x161); wmcodec_write(PLLK3, 0x26); /* set clock div */ wmcodec_write(CLKCTRL, 1 | (1 << 2) | (2 << 5) | (1 << 8)); /* set srate */ wmcodec_write(SRATECTRL, (0 << 1)); } void audiohw_enable_recording(bool source_mic) { (void)source_mic; /* We only have a line-in (I think) */ /* reset the I2S controller into known state */ i2s_reset(); wmcodec_write(RESET, 0x1ff); /*Reset*/ wmcodec_write(PWRMGMT1, 0x2b); wmcodec_write(PWRMGMT2, 0x18f); /* Enable ADC - 0x0c enables left/right PGA input, and 0x03 turns on power to the ADCs */ wmcodec_write(PWRMGMT3, 0x6f); wmcodec_write(AINTFCE, 0x10); wmcodec_write(CLKCTRL, 0x49); wmcodec_write(OUTCTRL, 1); /* The iPod can handle multiple frequencies, but fix at 44.1KHz for now */ audiohw_set_sample_rate(WM8758_44100HZ); wmcodec_write(INCTRL,0x44); /* Connect L2 and R2 inputs */ /* Set L2/R2_2BOOSTVOL to 0db (bits 4-6) */ /* 000 = disabled 001 = -12dB 010 = -9dB 011 = -6dB 100 = -3dB 101 = 0dB 110 = 3dB 111 = 6dB */ wmcodec_write(LADCBOOST,0x50); wmcodec_write(RADCBOOST,0x50); /* Set L/R input PGA Volume to 0db */ // wm8758_write(LINPGAVOL,0x3f); // wm8758_write(RINPGAVOL,0x13f); /* Enable monitoring */ wmcodec_write(LOUTMIX,0x17); /* Enable output mixer - BYPL2LMIX @ 0db*/ wmcodec_write(ROUTMIX,0x17); /* Enable output mixer - BYPR2RMIX @ 0db*/ audiohw_mute(0); } void audiohw_disable_recording(void) { audiohw_mute(1); wmcodec_write(PWRMGMT3, 0x0); wmcodec_write(PWRMGMT1, 0x0); wmcodec_write(PWRMGMT2, 0x40); } void audiohw_set_recvol(int left, int right, int type) { (void)left; (void)right; (void)type; } void audiohw_set_monitor(int enable) { (void)enable; } void audiohw_set_equalizer_band(int band, int freq, int bw, int gain) { unsigned int eq = 0; /* Band 1..3 are peak filters */ if (band >= 1 && band <= 3) { eq |= (bw << 8); } eq |= (freq << 5); eq |= 12 - gain; if (band == 0) { wmcodec_write(EQ1, eq | 0x100); /* Always apply EQ to the DAC path */ } else if (band == 1) { wmcodec_write(EQ2, eq); } else if (band == 2) { wmcodec_write(EQ3, eq); } else if (band == 3) { wmcodec_write(EQ4, eq); } else if (band == 4) { wmcodec_write(EQ5, eq); } }