| /*************************************************************************** |
| * __________ __ ___. |
| * 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 "i2c-pp5020.h" |
| #include "wm8975.h" |
| #include "pcf50605.h" |
| |
| void wmcodec_reset(void); |
| |
| #define IPOD_PCM_LEVEL 0x65 /* -6dB */ |
| |
| /* |
| * Reset the I2S BIT.FORMAT I2S, 16bit, FIFO.FORMAT 32bit |
| */ |
| static void i2s_reset(void) |
| { |
| /* PP502x */ |
| |
| /* I2S soft reset */ |
| outl(inl(0x70002800) | 0x80000000, 0x70002800); |
| outl(inl(0x70002800) & ~0x80000000, 0x70002800); |
| |
| /* BIT.FORMAT [11:10] = I2S (default) */ |
| outl(inl(0x70002800) & ~0xc00, 0x70002800); |
| /* BIT.SIZE [9:8] = 16bit (default) */ |
| outl(inl(0x70002800) & ~0x300, 0x70002800); |
| |
| /* FIFO.FORMAT [6:4] = 32 bit LSB */ |
| /* since BIT.SIZ < FIFO.FORMAT low 16 bits will be 0 */ |
| outl(inl(0x70002800) | 0x30, 0x70002800); |
| |
| /* RX_ATN_LVL=1 == when 12 slots full */ |
| /* TX_ATN_LVL=1 == when 12 slots empty */ |
| outl(inl(0x7000280c) | 0x33, 0x7000280c); |
| |
| /* Rx.CLR = 1, TX.CLR = 1 */ |
| outl(inl(0x7000280c) | 0x1100, 0x7000280c); |
| } |
| |
| void wm8975_write(int reg, int data) |
| { |
| ipod_i2c_send(0x1a, (reg<<1) | ((data&0x100)>>8),data&0xff); |
| } |
| |
| /* |
| * Initialise the WM8975 for playback via headphone and line out. |
| * Note, I'm using the WM8750 datasheet as its apparently close. |
| */ |
| int wmcodec_init(void) { |
| /* reset I2C */ |
| i2c_init(); |
| |
| /* normal outputs for CDI and I2S pin groups */ |
| outl(inl(0x70000020) & ~0x300, 0x70000020); |
| |
| /*mini2?*/ |
| outl(inl(0x70000010) & ~0x3000000, 0x70000010); |
| /*mini2?*/ |
| |
| /* device reset */ |
| outl(inl(0x60006004) | 0x800, 0x60006004); |
| outl(inl(0x60006004) & ~0x800, 0x60006004); |
| |
| /* device enable */ |
| outl(inl(0x6000600C) | 0x807, 0x6000600C); |
| |
| /* enable external dev clock clocks */ |
| outl(inl(0x6000600c) | 0x2, 0x6000600c); |
| |
| /* external dev clock to 24MHz */ |
| outl(inl(0x70000018) & ~0xc, 0x70000018); |
| |
| return 0; |
| } |
| |
| /* Silently enable / disable audio output */ |
| void wmcodec_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). |
| */ |
| wm8975_write(RESET, 0x1ff); /*Reset*/ |
| wm8975_write(RESET, 0x0); |
| |
| /* 2. Enable Vmid and VREF. */ |
| wm8975_write(PWRMGMT1, 0xc0); /*Pwr Mgmt(1)*/ |
| |
| /* 3. Enable DACs as required. */ |
| wm8975_write(PWRMGMT2, 0x180); /*Pwr Mgmt(2)*/ |
| |
| /* 4. Enable line and / or headphone output buffers as required. */ |
| wm8975_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) */ |
| wm8975_write(AINTFCE, 0x42); |
| |
| /* The iPod can handle multiple frequencies, but fix at 44.1KHz for now */ |
| wmcodec_set_sample_rate(WM8975_44100HZ); |
| |
| /* set the volume to -6dB */ |
| wm8975_write(LOUT1VOL, IPOD_PCM_LEVEL); |
| wm8975_write(ROUT1VOL,0x100 | IPOD_PCM_LEVEL); |
| wm8975_write(LOUT1VOL, IPOD_PCM_LEVEL); |
| wm8975_write(ROUT1VOL,0x100 | IPOD_PCM_LEVEL); |
| |
| wm8975_write(LOUTMIX1, 0x150); /* Left out Mix(def) */ |
| wm8975_write(LOUTMIX2, 0x50); |
| |
| wm8975_write(ROUTMIX1, 0x50); /* Right out Mix(def) */ |
| wm8975_write(ROUTMIX2, 0x150); |
| |
| wm8975_write(MOUTMIX1, 0x0); /* Mono out Mix */ |
| wm8975_write(MOUTMIX2, 0x0); |
| |
| wmcodec_mute(0); |
| } else { |
| wmcodec_mute(1); |
| } |
| } |
| |
| int wmcodec_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 */ |
| wm8975_write(LOUT1VOL, vol_l); |
| wm8975_write(ROUT1VOL, 0x100 | vol_r); |
| |
| return 0; |
| } |
| |
| int wmcodec_set_lineout_vol(int vol_l, int vol_r) |
| { |
| /* OUT2 */ |
| wm8975_write(LOUT2VOL, vol_l); |
| wm8975_write(ROUT2VOL, 0x100 | vol_r); |
| |
| return 0; |
| } |
| |
| int wmcodec_set_mixer_vol(int channel1, int channel2) |
| { |
| (void)channel1; |
| (void)channel2; |
| |
| return 0; |
| } |
| |
| /* We are using Linear bass control */ |
| void wmcodec_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 */ |
| wm8975_write(BASSCTRL, regvalues[value+6]); |
| } |
| } |
| |
| void wmcodec_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 */ |
| wm8975_write(TREBCTRL, regvalues[value+6]); |
| } |
| } |
| |
| int wmcodec_mute(int mute) |
| { |
| if (mute) |
| { |
| /* Set DACMU = 1 to soft-mute the audio DACs. */ |
| wm8975_write(DACCTRL, 0x8); |
| } else { |
| /* Set DACMU = 0 to soft-un-mute the audio DACs. */ |
| wm8975_write(DACCTRL, 0x0); |
| } |
| |
| return 0; |
| } |
| |
| /* Nice shutdown of WM8975 codec */ |
| void wmcodec_close(void) |
| { |
| /* 1. Set DACMU = 1 to soft-mute the audio DACs. */ |
| wm8975_write(DACCTRL, 0x8); |
| |
| /* 2. Disable all output buffers. */ |
| wm8975_write(PWRMGMT2, 0x0); /*Pwr Mgmt(2)*/ |
| |
| /* 3. Switch off the power supplies. */ |
| wm8975_write(PWRMGMT1, 0x0); /*Pwr Mgmt(1)*/ |
| } |
| |
| /* Change the order of the noise shaper, 5th order is recommended above 32kHz */ |
| void wmcodec_set_nsorder(int order) |
| { |
| (void)order; |
| } |
| |
| /* Note: Disable output before calling this function */ |
| void wmcodec_set_sample_rate(int sampling_control) { |
| |
| wm8975_write(0x08, sampling_control); |
| |
| } |
| |
| void wmcodec_enable_recording(bool source_mic) { |
| |
| (void)source_mic; |
| } |
| |
| void wmcodec_disable_recording(void) { |
| |
| } |
| |
| void wmcodec_set_recvol(int left, int right, int type) { |
| |
| (void)left; |
| (void)right; |
| (void)type; |
| } |
| |
| void wmcodec_set_monitor(int enable) { |
| |
| (void)enable; |
| } |