diff options
Diffstat (limited to 'src/mainboard')
| -rw-r--r-- | src/mainboard/google/rush_ryu/mainboard.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/mainboard/google/rush_ryu/mainboard.c b/src/mainboard/google/rush_ryu/mainboard.c index 9673aa5410..2955958d3d 100644 --- a/src/mainboard/google/rush_ryu/mainboard.c +++ b/src/mainboard/google/rush_ryu/mainboard.c @@ -23,6 +23,7 @@ #include <cbmem.h> #include <delay.h> #include <device/device.h> +#include <device/i2c.h> #include <elog.h> #include <memrange.h> #include <soc/addressmap.h> @@ -208,6 +209,37 @@ static void setup_audio(void) clock_enable_audio(); } +#define AD4567_DEV 0x34 +#define PWR_CTL 0 +#define DAC_CTL 2 +#define SPWDN (1 << 0) +#define DAC_MUTE (1 << 6) +#define DAC_FS (0x7 << 0) +#define SR_32K_48KHZ 0x2 + +static void enable_ad4567_spkr_amp(void) +{ + uint8_t reg_byte; + + if (board_id() >= BOARD_ID_PROTO_3) + return; + /* + * I2C6, device 0x34 is an AD4567 speaker amp on P0/P1. + * It needs to have a couple of regs tweaked to turn it on + * so it can provide audio output to the mono speaker on P0/P1. + */ + i2c_readb(I2C6_BUS, AD4567_DEV, PWR_CTL, ®_byte); + reg_byte &= ~SPWDN; // power up amp + i2c_writeb(I2C6_BUS, AD4567_DEV, PWR_CTL, reg_byte); + + /* The next 2 settings are defaults, but set them anyway */ + i2c_readb(I2C6_BUS, AD4567_DEV, DAC_CTL, ®_byte); + reg_byte &= ~DAC_MUTE; // unmute DAC (default) + reg_byte &= ~DAC_FS; // mask sample rate bits + reg_byte |= SR_32K_48KHZ; // set 32K-48KHz sample rate (default) + i2c_writeb(I2C6_BUS, AD4567_DEV, DAC_CTL, reg_byte); +} + static void mainboard_init(device_t dev) { soc_configure_funits(funits, ARRAY_SIZE(funits)); @@ -217,6 +249,8 @@ static void mainboard_init(device_t dev) i2c_init(I2C6_BUS); setup_audio(); + /* Temp hack for P1 board: Enable speaker amp (powerup, etc.) */ + enable_ad4567_spkr_amp(); elog_init(); elog_add_boot_reason(); |