/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Driver for WM8975 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 "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 "wm8975.h" #include "i2s.h" /* use zero crossing to reduce clicks during volume changes */ #define VOLUME_ZC_WAIT (1<<7) /* 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 == 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) { 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 */ /* Silently enable / disable audio output */ void audiohw_enable_output(bool enable) { if (enable) { /* reset the I2S controller into known state */ i2s_reset(); /* * 1. Switch on power supplies. * By default the WM8750L 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, 0x1ff); /*Reset*/ wmcodec_write(RESET, 0x0); /* 2. Enable Vmid and VREF. */ wmcodec_write(PWRMGMT1, 0xc0); /*Pwr Mgmt(1)*/ /* From app notes: allow Vref to stabilize to reduce clicks */ sleep(HZ/4); /* 3. Enable DACs as required. */ wmcodec_write(PWRMGMT2, 0x180); /*Pwr Mgmt(2)*/ /* 4. Enable line and / or headphone output buffers as required. */ wmcodec_write(PWRMGMT2, 0x1f8); /*Pwr Mgmt(2)*/ /* BCLKINV=0(Dont invert BCLK) MS=1(Enable Master) LRSWAP=0 LRP=0 */ /* IWL=00(16 bit) FORMAT=10(I2S format) */ wmcodec_write(AINTFCE, 0x42); /* The iPod can handle multiple frequencies, but fix at 44.1KHz for now */ audiohw_set_sample_rate(WM8975_44100HZ); /* set the volume to -6dB */ wmcodec_write(LOUT1VOL, VOLUME_ZC_WAIT | IPOD_PCM_LEVEL); wmcodec_write(ROUT1VOL, VOLUME_ZC_WAIT | 0x100 | IPOD_PCM_LEVEL); wmcodec_write(LOUTMIX1, 0x150); /* Left out Mix(def) */ wmcodec_write(LOUTMIX2, 0x50); wmcodec_write(ROUTMIX1, 0x50); /* Right out Mix(def) */ wmcodec_write(ROUTMIX2, 0x150); wmcodec_write(MOUTMIX1, 0x0); /* Mono out Mix */ wmcodec_write(MOUTMIX2, 0x0); audiohw_mute(0); } else { audiohw_mute(1); } } 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) */ /* OUT1 */ wmcodec_write(LOUT1VOL, VOLUME_ZC_WAIT | vol_l); wmcodec_write(ROUT1VOL, VOLUME_ZC_WAIT | 0x100 | vol_r); return 0; } int audiohw_set_lineout_vol(int vol_l, int vol_r) { /* OUT2 */ wmcodec_write(LOUT2VOL, VOLUME_ZC_WAIT | vol_l); wmcodec_write(ROUT2VOL, VOLUME_ZC_WAIT | 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) { int regvalues[]={11, 10, 10, 9, 8, 8, 0xf , 6, 6, 5, 4, 4, 3, 2, 1, 0}; if ((value >= -6) && (value <= 9)) { /* We use linear bass control with 130Hz cutoff */ wmcodec_write(BASSCTRL, regvalues[value+6]); } } void audiohw_set_treble(int value) { int regvalues[]={11, 10, 10, 9, 8, 8, 0xf , 6, 6, 5, 4, 4, 3, 2, 1, 0}; if ((value >= -6) && (value <= 9)) { /* We use a 8Khz cutoff */ wmcodec_write(TREBCTRL, regvalues[value+6]); } } int audiohw_mute(int mute) { if (mute) { /* Set DACMU = 1 to soft-mute the audio DACs. */ wmcodec_write(DACCTRL, 0x8); } else { /* Set DACMU = 0 to soft-un-mute the audio DACs. */ wmcodec_write(DACCTRL, 0x0); } return 0; } /* Nice shutdown of WM8975 codec */ void audiohw_close(void) { /* 1. Set DACMU = 1 to soft-mute the audio DACs. */ wmcodec_write(DACCTRL, 0x8); /* 2. Disable all output buffers. */ wmcodec_write(PWRMGMT2, 0x0); /*Pwr Mgmt(2)*/ /* 3. Switch off the power supplies. */ wmcodec_write(PWRMGMT1, 0x0); /*Pwr Mgmt(1)*/ } /* 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) { wmcodec_write(0x08, sampling_control); } void audiohw_enable_recording(bool source_mic) { (void)source_mic; /* reset the I2S controller into known state */ i2s_reset(); /* * 1. Switch on power supplies. * By default the WM8750L 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(0x0f, 0x1ff); wmcodec_write(0x0f, 0x000); /* 2. Enable Vmid and VREF. */ wmcodec_write(0x19, 0xc0); /*Pwr Mgmt(1)*/ /* 3. Enable ADCs as required. */ wmcodec_write(0x19, 0xcc); /*Pwr Mgmt(1)*/ wmcodec_write(0x1a, 0x180); /*Pwr Mgmt(2)*/ /* 4. Enable line and / or headphone output buffers as required. */ wmcodec_write(0x19, 0xfc); /*Pwr Mgmt(1)*/ /* BCLKINV=0(Dont invert BCLK) MS=1(Enable Master) LRSWAP=0 LRP=0 */ /* IWL=00(16 bit) FORMAT=10(I2S format) */ wmcodec_write(0x07, 0x42); /* The iPod can handle multiple frequencies, but fix at 44.1KHz for now */ audiohw_set_sample_rate(WM8975_44100HZ); /* unmute inputs */ wmcodec_write(0x00, 0x17); /* LINVOL (def 0dB) */ wmcodec_write(0x01, 0x117); /* RINVOL (def 0dB) */ wmcodec_write(0x15, 0x1d7); /* LADCVOL max vol x was ff */ wmcodec_write(0x16, 0x1d7); /* RADCVOL max vol x was ff */ if (source_mic) { /* VSEL=10(def) DATSEL=10 (use right ADC only) */ wmcodec_write(0x17, 0xc9); /* Additional control(1) */ /* VROI=1 (sets output resistance to 40kohms) */ wmcodec_write(0x1b, 0x40); /* Additional control(3) */ /* LINSEL=1 (LINPUT2) LMICBOOST=10 (20dB boost) */ wmcodec_write(0x20, 0x60); /* ADCL signal path */ wmcodec_write(0x21, 0x60); /* ADCR signal path */ } else { /* VSEL=10(def) DATSEL=00 (left->left, right->right) */ wmcodec_write(0x17, 0xc1); /* Additional control(1) */ /* VROI=1 (sets output resistance to 40kohms) */ wmcodec_write(0x1b, 0x40); /* Additional control(3) */ /* LINSEL=0 (LINPUT1) LMICBOOST=00 (bypass boost) */ wmcodec_write(0x20, 0x00); /* ADCL signal path */ /* RINSEL=0 (RINPUT1) RMICBOOST=00 (bypass boost) */ wmcodec_write(0x21, 0x00); /* ADCR signal path */ } } void audiohw_disable_recording(void) { /* 1. Set DACMU = 1 to soft-mute the audio DACs. */ wmcodec_write(0x05, 0x8); /* 2. Disable all output buffers. */ wmcodec_write(0x1a, 0x0); /*Pwr Mgmt(2)*/ /* 3. Switch off the power supplies. */ wmcodec_write(0x19, 0x0); /*Pwr Mgmt(1)*/ } void audiohw_set_recvol(int left, int right, int type) { (void)left; (void)right; (void)type; } void audiohw_set_monitor(int enable) { (void)enable; }