diff options
Diffstat (limited to 'firmware/drivers/wm8975.c')
| -rw-r--r-- | firmware/drivers/wm8975.c | 122 |
1 files changed, 29 insertions, 93 deletions
diff --git a/firmware/drivers/wm8975.c b/firmware/drivers/wm8975.c index 64a123b..a961356 100644 --- a/firmware/drivers/wm8975.c +++ b/firmware/drivers/wm8975.c @@ -37,77 +37,13 @@ #include "buffer.h" #include "audio.h" -#include "i2c-pp5020.h" +#include "wmcodec.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) @@ -124,39 +60,39 @@ void wmcodec_enable_output(bool enable) * 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); + wmcodec_write(RESET, 0x1ff); /*Reset*/ + wmcodec_write(RESET, 0x0); /* 2. Enable Vmid and VREF. */ - wm8975_write(PWRMGMT1, 0xc0); /*Pwr Mgmt(1)*/ + wmcodec_write(PWRMGMT1, 0xc0); /*Pwr Mgmt(1)*/ /* 3. Enable DACs as required. */ - wm8975_write(PWRMGMT2, 0x180); /*Pwr Mgmt(2)*/ + wmcodec_write(PWRMGMT2, 0x180); /*Pwr Mgmt(2)*/ /* 4. Enable line and / or headphone output buffers as required. */ - wm8975_write(PWRMGMT2, 0x1f8); /*Pwr Mgmt(2)*/ + 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) */ - wm8975_write(AINTFCE, 0x42); + wmcodec_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); + 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); - wm8975_write(LOUTMIX1, 0x150); /* Left out Mix(def) */ - wm8975_write(LOUTMIX2, 0x50); + wmcodec_write(LOUTMIX1, 0x150); /* Left out Mix(def) */ + wmcodec_write(LOUTMIX2, 0x50); - wm8975_write(ROUTMIX1, 0x50); /* Right out Mix(def) */ - wm8975_write(ROUTMIX2, 0x150); + wmcodec_write(ROUTMIX1, 0x50); /* Right out Mix(def) */ + wmcodec_write(ROUTMIX2, 0x150); - wm8975_write(MOUTMIX1, 0x0); /* Mono out Mix */ - wm8975_write(MOUTMIX2, 0x0); + wmcodec_write(MOUTMIX1, 0x0); /* Mono out Mix */ + wmcodec_write(MOUTMIX2, 0x0); wmcodec_mute(0); } else { @@ -173,8 +109,8 @@ int wmcodec_set_master_vol(int vol_l, int vol_r) /* 0101111 == mute (0x2f) */ /* OUT1 */ - wm8975_write(LOUT1VOL, vol_l); - wm8975_write(ROUT1VOL, 0x100 | vol_r); + wmcodec_write(LOUT1VOL, vol_l); + wmcodec_write(ROUT1VOL, 0x100 | vol_r); return 0; } @@ -182,8 +118,8 @@ int wmcodec_set_master_vol(int vol_l, int vol_r) int wmcodec_set_lineout_vol(int vol_l, int vol_r) { /* OUT2 */ - wm8975_write(LOUT2VOL, vol_l); - wm8975_write(ROUT2VOL, 0x100 | vol_r); + wmcodec_write(LOUT2VOL, vol_l); + wmcodec_write(ROUT2VOL, 0x100 | vol_r); return 0; } @@ -203,7 +139,7 @@ void wmcodec_set_bass(int value) if ((value >= -6) && (value <= 9)) { /* We use linear bass control with 130Hz cutoff */ - wm8975_write(BASSCTRL, regvalues[value+6]); + wmcodec_write(BASSCTRL, regvalues[value+6]); } } @@ -213,7 +149,7 @@ void wmcodec_set_treble(int value) if ((value >= -6) && (value <= 9)) { /* We use a 8Khz cutoff */ - wm8975_write(TREBCTRL, regvalues[value+6]); + wmcodec_write(TREBCTRL, regvalues[value+6]); } } @@ -222,10 +158,10 @@ int wmcodec_mute(int mute) if (mute) { /* Set DACMU = 1 to soft-mute the audio DACs. */ - wm8975_write(DACCTRL, 0x8); + wmcodec_write(DACCTRL, 0x8); } else { /* Set DACMU = 0 to soft-un-mute the audio DACs. */ - wm8975_write(DACCTRL, 0x0); + wmcodec_write(DACCTRL, 0x0); } return 0; @@ -235,13 +171,13 @@ int wmcodec_mute(int mute) void wmcodec_close(void) { /* 1. Set DACMU = 1 to soft-mute the audio DACs. */ - wm8975_write(DACCTRL, 0x8); + wmcodec_write(DACCTRL, 0x8); /* 2. Disable all output buffers. */ - wm8975_write(PWRMGMT2, 0x0); /*Pwr Mgmt(2)*/ + wmcodec_write(PWRMGMT2, 0x0); /*Pwr Mgmt(2)*/ /* 3. Switch off the power supplies. */ - wm8975_write(PWRMGMT1, 0x0); /*Pwr Mgmt(1)*/ + wmcodec_write(PWRMGMT1, 0x0); /*Pwr Mgmt(1)*/ } /* Change the order of the noise shaper, 5th order is recommended above 32kHz */ @@ -253,7 +189,7 @@ void wmcodec_set_nsorder(int order) /* Note: Disable output before calling this function */ void wmcodec_set_sample_rate(int sampling_control) { - wm8975_write(0x08, sampling_control); + wmcodec_write(0x08, sampling_control); } |