diff options
Diffstat (limited to 'src/mainboard')
| -rw-r--r-- | src/mainboard/google/urara/bootblock.c | 59 |
1 files changed, 47 insertions, 12 deletions
diff --git a/src/mainboard/google/urara/bootblock.c b/src/mainboard/google/urara/bootblock.c index f8f62f7031..b2f6b70cd4 100644 --- a/src/mainboard/google/urara/bootblock.c +++ b/src/mainboard/google/urara/bootblock.c @@ -23,15 +23,13 @@ #include <stdint.h> #include <soc/clocks.h> +#define PADS_FUNCTION_SELECT0_ADDR (0xB8101C00 + 0xC0) + #define GPIO_BIT_EN_ADDR(bank) (0xB8101C00 + 0x200 + (0x24 * (bank))) -/* MFIO definitions for UART0/1 */ +/* MFIO definitions for UART1 */ #define UART1_RXD_MFIO 59 #define UART1_TXD_MFIO 60 -#define UART0_RXD_MFIO 55 -#define UART0_TXD_MFIO 56 -#define UART0_RTS_MFIO 57 -#define UART0_CTS_MFIO 58 /* MFIO definitions for SPIM */ #define SPIM1_D0_TXD_MFIO 5 @@ -41,6 +39,14 @@ #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 + static void uart1_mfio_setup(void) { u32 reg, mfio_mask; @@ -48,7 +54,7 @@ static void uart1_mfio_setup(void) /* * Disable GPIO for UART1 MFIOs * All UART MFIOs have MFIO/16 = 3, therefore we use GPIO pad 3 - * This is the primary function (0) of these MFIOs and therfore there + * This is the only function (0) of these MFIOs and therfore there * is no need to set up a function number in the corresponding * function select register. */ @@ -71,21 +77,18 @@ static void spim1_mfio_setup(void) /* * Disable GPIO for SPIM1 MFIOs * All SPFI1 MFIOs have MFIO/16 = 0, therefore we use GPIO pad 0 - * This is the primary function (0) of these MFIOs and therfore there + * This is the only function (0) of these MFIOs and therfore there * is no need to set up a function number in the corresponding * function select register. */ reg = read32(GPIO_BIT_EN_ADDR(0)); - /* Disable GPIO for UART0 MFIOs */ + /* Disable GPIO for SPIM1 MFIOs */ mfio_mask = 1 << (SPIM1_D0_TXD_MFIO % 16); mfio_mask |= 1 << (SPIM1_D1_RXD_MFIO % 16); mfio_mask |= 1 << (SPIM1_MCLK_MFIO % 16); mfio_mask |= 1 << (SPIM1_D2_MFIO % 16); mfio_mask |= 1 << (SPIM1_D3_MFIO % 16); - - /* TODO: for the moment it only sets up CS0 (NOR) */ - /* There is no need for other CS lines in Coreboot */ mfio_mask |= 1 << (SPIM1_CS0_MFIO % 16); /* Clear relevant bits */ @@ -98,6 +101,36 @@ static void spim1_mfio_setup(void) write32(GPIO_BIT_EN_ADDR(0), reg); } +static void i2c0_mfio_setup(void) +{ + u32 reg, mfio_mask; + + /* + * Disable GPIO for I2C0 MFIOs + * All UART MFIOs have MFIO/16 = 1, therefore we use GPIO pad 1 + */ + reg = read32(GPIO_BIT_EN_ADDR(1)); + mfio_mask = 1 << (I2C0_DATA_MFIO % 16); + mfio_mask |= 1 << (I2C0_CLK_MFIO % 16); + /* Clear relevant bits */ + reg &= ~mfio_mask; + /* + * Set corresponding bits in the upper half word + * in order to be able to modify the chosen pins + */ + reg |= mfio_mask << 16; + write32(GPIO_BIT_EN_ADDR(1), reg); + + /* Set bits to 0 (clear) which is the primary function + * for these MFIOs; those bits will all be set to 1 by + * default + */ + reg = read32(PADS_FUNCTION_SELECT0_ADDR); + reg &= ~(I2C0_DATA_FUNCTION_MASK << I2C0_DATA_FUNCTION_OFFSET); + reg &= ~(I2C0_CLK_FUNCTION_MASK << I2C0_CLK_FUNCTION_OFFSET); + write32(PADS_FUNCTION_SELECT0_ADDR, reg); +} + static int init_clocks(void) { int ret; @@ -124,6 +157,8 @@ static int init_clocks(void) /* System PLL divided by 7 divided by 62 -> 1.8433 Mhz */ uart1_clk_setup(6, 61); + /* System PLL divided by 4 divided by 3 -> 33.33 MHz */ + i2c0_clk_setup(3, 2); /* Ethernet clocks setup: ENET as clock source */ eth_clk_setup(0, 7); @@ -148,6 +183,6 @@ static void bootblock_mainboard_init(void) /* Disable GPIO on the peripheral lines */ uart1_mfio_setup(); spim1_mfio_setup(); + i2c0_mfio_setup(); } - } |