diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mainboard/google/urara/bootblock.c | 44 |
1 files changed, 25 insertions, 19 deletions
diff --git a/src/mainboard/google/urara/bootblock.c b/src/mainboard/google/urara/bootblock.c index c8e15c8899..4530c8c1b8 100644 --- a/src/mainboard/google/urara/bootblock.c +++ b/src/mainboard/google/urara/bootblock.c @@ -51,13 +51,13 @@ typedef enum { #define SPIM1_D3_MFIO 7 #define SPIM1_CS0_MFIO 0 -/* MFIO definitions for I2C0 */ -#define I2C0_DATA_MFIO 28 -#define I2C0_CLK_MFIO 29 -#define I2C0_DATA_FUNCTION_OFFSET 20 -#define I2C0_CLK_FUNCTION_OFFSET 21 -#define I2C0_DATA_FUNCTION_MASK 0x1 -#define I2C0_CLK_FUNCTION_MASK 0x1 +/* MFIO definitions for I2C */ +#define I2C_DATA_MFIO(i) (28 + (2*(i))) +#define I2C_CLK_MFIO(i) (29 + (2*(i))) +#define I2C_DATA_FUNCTION_OFFSET(i) (20 + (2*(i))) +#define I2C_CLK_FUNCTION_OFFSET(i) (21 + (2*(i))) +#define I2C_DATA_FUNCTION_MASK 0x1 +#define I2C_CLK_FUNCTION_MASK 0x1 static void pad_drive_strength(u32 pad, drive_strength strength) { @@ -136,17 +136,17 @@ static void spim1_mfio_setup(void) pad_drive_strength(SPIM1_MCLK_MFIO, DRIVE_STRENGTH_12mA); } -static void i2c0_mfio_setup(void) +static void i2c_mfio_setup(int interface) { u32 reg, mfio_mask; + assert(interface < 4); /* - * Disable GPIO for I2C0 MFIOs - * All UART MFIOs have MFIO/16 = 1, therefore we use GPIO pad 1 + * Disable GPIO for I2C MFIOs */ - reg = read32(GPIO_BIT_EN_ADDR(1)); - mfio_mask = 1 << (I2C0_DATA_MFIO % 16); - mfio_mask |= 1 << (I2C0_CLK_MFIO % 16); + reg = read32(GPIO_BIT_EN_ADDR(I2C_DATA_MFIO(interface) / 16)); + mfio_mask = 1 << (I2C_DATA_MFIO(interface) % 16); + mfio_mask |= 1 << (I2C_CLK_MFIO(interface) % 16); /* Clear relevant bits */ reg &= ~mfio_mask; /* @@ -154,15 +154,21 @@ static void i2c0_mfio_setup(void) * in order to be able to modify the chosen pins */ reg |= mfio_mask << 16; - write32(GPIO_BIT_EN_ADDR(1), reg); + write32(GPIO_BIT_EN_ADDR(I2C_DATA_MFIO(interface) / 16), reg); - /* Set bits to 0 (clear) which is the primary function + /* for I2C0 and I2C1: + * Set bits to 0 (clear) which is the primary function * for these MFIOs; those bits will all be set to 1 by - * default + * default. + * There is no need to do that for I2C2 and I2C3 */ + if (interface > 1) + return; reg = read32(PADS_FUNCTION_SELECT0_ADDR); - reg &= ~(I2C0_DATA_FUNCTION_MASK << I2C0_DATA_FUNCTION_OFFSET); - reg &= ~(I2C0_CLK_FUNCTION_MASK << I2C0_CLK_FUNCTION_OFFSET); + reg &= ~(I2C_DATA_FUNCTION_MASK << + I2C_DATA_FUNCTION_OFFSET(interface)); + reg &= ~(I2C_CLK_FUNCTION_MASK << + I2C_CLK_FUNCTION_OFFSET(interface)); write32(PADS_FUNCTION_SELECT0_ADDR, reg); } @@ -218,6 +224,6 @@ static void bootblock_mainboard_init(void) /* Disable GPIO on the peripheral lines */ uart1_mfio_setup(); spim1_mfio_setup(); - i2c0_mfio_setup(); + i2c_mfio_setup(0); } } |