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snow: Make coreboot set up pins for busses it knows are hooked up as such.

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Coreboot knows that, for the snow board, certain pins are to be connected to
bus controllers in the SOC and to the wires of a bus external to the SOC. It
can configure them as such and free its payload from having to know how to
set everything up.

BUG=None
TEST=Built and booted on Snow.
BRANCH=None

Change-Id: Ia39cc5d0909f1be86dee828c0419bffa16edb69b
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/55635
Commit-Queue: Stefan Reinauer <reinauer@google.com>
Reviewed-by: Stefan Reinauer <reinauer@google.com>
Tested-by: Stefan Reinauer <reinauer@google.com>
This commit is contained in:
Gabe Black 2013-05-18 15:55:47 -07:00 • committed by ChromeBot
commit 3128756e83
1 changed files with 28 additions and 0 deletions
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28
src/mainboard/google/snow/mainboard.c
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@ -176,6 +176,32 @@ static void disable_usb30_pll(void)
gpio_direction_output(usb3_pll_l, 0);
}
static void gpio_init(void)
{
/* Set up the I2C busses. */
exynos_pinmux_config(PERIPH_ID_I2C0, PINMUX_FLAG_NONE);
exynos_pinmux_config(PERIPH_ID_I2C1, PINMUX_FLAG_NONE);
exynos_pinmux_config(PERIPH_ID_I2C2, PINMUX_FLAG_NONE);
exynos_pinmux_config(PERIPH_ID_I2C3, PINMUX_FLAG_NONE);
exynos_pinmux_config(PERIPH_ID_I2C4, PINMUX_FLAG_NONE);
exynos_pinmux_config(PERIPH_ID_I2C7, PINMUX_FLAG_NONE);
/* Set up the GPIOs used to arbitrate for I2C bus 4. */
gpio_set_pull(GPIO_F03, GPIO_PULL_NONE);
gpio_set_pull(GPIO_E04, GPIO_PULL_NONE);
gpio_direction_output(GPIO_F03, 1);
gpio_direction_input(GPIO_E04);
/* Set up the GPIO used to enable the audio codec. */
gpio_set_pull(GPIO_X17, GPIO_PULL_NONE);
gpio_set_pull(GPIO_X15, GPIO_PULL_NONE);
gpio_direction_output(GPIO_X17, 1);
gpio_direction_output(GPIO_X15, 1);
/* Set up the I2S busses. */
exynos_pinmux_config(PERIPH_ID_I2S1, PINMUX_FLAG_NONE);
}
/* this happens after cpu_init where exynos resources are set */
static void mainboard_init(device_t dev)
{
@ -186,6 +212,8 @@ static void mainboard_init(device_t dev)
};
void *fb_addr;
gpio_init();
i2c_init(TPS69050_BUS, I2C_0_SPEED, I2C_SLAVE);
i2c_init(7, I2C_0_SPEED, I2C_SLAVE);