| /*************************************************************************** |
| * __________ __ ___. |
| * 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" |
| |
| /* 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)*/ |
| |
| /* 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, IPOD_PCM_LEVEL); |
| wmcodec_write(ROUT1VOL,0x100 | IPOD_PCM_LEVEL); |
| wmcodec_write(LOUT1VOL, IPOD_PCM_LEVEL); |
| wmcodec_write(ROUT1VOL,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, vol_l); |
| wmcodec_write(ROUT1VOL, 0x100 | 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) |
| { |
| 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, 0xc8); /* 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, 0xc0); /* 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; |
| } |