diff options
| -rw-r--r-- | board/plankton/board.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/board/plankton/board.c b/board/plankton/board.c index b6c9c666ca..ebdd85f722 100644 --- a/board/plankton/board.c +++ b/board/plankton/board.c @@ -163,6 +163,30 @@ const struct i2c_port_t i2c_ports[] = { }; const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports); +/* 8-bit address */ +#define SN75DP130_I2C_ADDR 0x5c + +static void sn75dp130_redriver_init(void) +{ + int i; + + /* Disable squelch detect */ + i2c_write8(1, SN75DP130_I2C_ADDR, 0x3, 0x1a); + /* Disable link training on re-driver source side */ + i2c_write8(1, SN75DP130_I2C_ADDR, 0x4, 0x0); + + /* + * Force Link voltage level & pre-emphasis by writing each of the lane's + * DPCD config registers 103-106h accordingly. + */ + i2c_write8(1, SN75DP130_I2C_ADDR, 0x1c, 0x0); + i2c_write8(1, SN75DP130_I2C_ADDR, 0x1d, 0x1); + for (i = 0x3; i < 0x7; i++) { + i2c_write8(1, SN75DP130_I2C_ADDR, 0x1e, i); + i2c_write8(1, SN75DP130_I2C_ADDR, 0x1f, 0x3); + } +} + static void board_init(void) { /* Enable interrupts on VBUS transitions. */ @@ -177,6 +201,7 @@ static void board_init(void) gpio_enable_interrupt(GPIO_DBG_MUX_FLIP_L); ina2xx_init(0, 0x399f, INA2XX_CALIB_1MA(10 /* mOhm */)); + sn75dp130_redriver_init(); } DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT); |