/*************************************************************************** * __________ __ ___. * 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 wm8975_reset(void); #define IPOD_PCM_LEVEL 0x65 /* -6dB */ #define RESET (0x0f<<1) #define PWRMGMT1 (0x19<<1) #define PWRMGMT2 (0x1a<<1) #define AINTFCE (0x07<<1) #define LOUT1VOL (0x02<<1) #define ROUT1VOL (0x03<<1) #define LOUT2VOL (0x28<<1) #define ROUT2VOL (0x29<<1) /* * 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); } /* * Initialise the WM8975 for playback via headphone and line out. * Note, I'm using the WM8750 datasheet as its apparently close. */ int wm8975_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 wm8975_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). */ ipod_i2c_send(0x1a, RESET | 1, 0xff); /*Reset*/ ipod_i2c_send(0x1a, RESET, 0x0); /* 2. Enable Vmid and VREF. */ ipod_i2c_send(0x1a, PWRMGMT1, 0xc0); /*Pwr Mgmt(1)*/ /* 3. Enable DACs as required. */ ipod_i2c_send(0x1a, PWRMGMT2 | 0x1, 0x80); /*Pwr Mgmt(2)*/ /* 4. Enable line and / or headphone output buffers as required. */ ipod_i2c_send(0x1a, PWRMGMT2 | 0x1, 0xf8); /*Pwr Mgmt(2)*/ /* BCLKINV=0(Dont invert BCLK) MS=1(Enable Master) LRSWAP=0 LRP=0 */ /* IWL=00(16 bit) FORMAT=10(I2S format) */ ipod_i2c_send(0x1a, AINTFCE, 0x42); /* The iPod can handle multiple frequencies, but fix at 44.1KHz for now */ wm8975_set_sample_rate(WM8975_44100HZ); /* set the volume to -6dB */ ipod_i2c_send(0x1a, LOUT1VOL, IPOD_PCM_LEVEL); ipod_i2c_send(0x1a, ROUT1VOL | 0x1, IPOD_PCM_LEVEL); ipod_i2c_send(0x1a, LOUT1VOL, IPOD_PCM_LEVEL); ipod_i2c_send(0x1a, ROUT1VOL | 0x1, IPOD_PCM_LEVEL); ipod_i2c_send(0x1a, 0x45, 0x50); /* Left out Mix(def) */ ipod_i2c_send(0x1a, 0x46, 0x50); ipod_i2c_send(0x1a, 0x48, 0x50); /* Right out Mix(def) */ ipod_i2c_send(0x1a, 0x4b, 0x50); ipod_i2c_send(0x1a, 0x4c, 0x0); /* Mono out Mix */ ipod_i2c_send(0x1a, 0x4e, 0x0); wm8975_mute(0); } else { wm8975_mute(1); } } int wm8975_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 */ ipod_i2c_send(0x1a, LOUT1VOL, vol_l); ipod_i2c_send(0x1a, ROUT1VOL | 0x1, vol_r); /* OUT2 */ ipod_i2c_send(0x1a, LOUT2VOL, vol_l); ipod_i2c_send(0x1a, ROUT2VOL | 0x1, vol_r); return 0; } int wm8975_set_mixer_vol(int channel1, int channel2) { (void)channel1; (void)channel2; return 0; } void wm8975_set_bass(int value) { (void)value; } void wm8975_set_treble(int value) { (void)value; } int wm8975_mute(int mute) { if (mute) { /* Set DACMU = 1 to soft-mute the audio DACs. */ ipod_i2c_send(0x1a, 0xa, 0x8); } else { /* Set DACMU = 0 to soft-un-mute the audio DACs. */ ipod_i2c_send(0x1a, 0xa, 0x0); } return 0; } /* Nice shutdown of WM8975 codec */ void wm8975_close(void) { /* 1. Set DACMU = 1 to soft-mute the audio DACs. */ ipod_i2c_send(0x1a, 0xa, 0x8); /* 2. Disable all output buffers. */ ipod_i2c_send(0x1a, 0x34, 0x0); /*Pwr Mgmt(2)*/ /* 3. Switch off the power supplies. */ ipod_i2c_send(0x1a, 0x32, 0x0); /*Pwr Mgmt(1)*/ } /* Change the order of the noise shaper, 5th order is recommended above 32kHz */ void wm8975_set_nsorder(int order) { (void)order; } /* Note: Disable output before calling this function */ void wm8975_set_sample_rate(int sampling_control) { ipod_i2c_send(0x1a, 0x10, sampling_control); } void wm8975_enable_recording(bool source_mic) { (void)source_mic; } void wm8975_disable_recording(void) { } void wm8975_set_recvol(int left, int right, int type) { (void)left; (void)right; (void)type; } void wm8975_set_monitor(int enable) { (void)enable; }