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/*
* This file is part of the coreboot project.
*
* Copyright 2014 Google Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#include <gpio.h>
#include <soc/addressmap.h>
#include <soc/clock.h>
#include <soc/early_configs.h>
#include <soc/nvidia/tegra/i2c.h>
static struct clk_rst_ctlr *clk_rst = (void *)TEGRA_CLK_RST_BASE;
static void setup_pinmux(void)
{
/* Write protect. */
gpio_input_pullup(GPIO(R1));
/* Recovery mode. */
gpio_input_pullup(GPIO(Q7));
/* Lid switch. */
gpio_input_pullup(GPIO(R4));
/* Power switch. */
gpio_input_pullup(GPIO(Q0));
/* Developer mode. */
gpio_input_pullup(GPIO(Q6));
/* EC in RW. */
gpio_input_pullup(GPIO(U4));
/* route PU4/5 to GMI to remove conflict w/PWM1/2. */
pinmux_set_config(PINMUX_GPIO_PU4_INDEX,
PINMUX_GPIO_PU4_FUNC_NOR); /* s/b GMI */
pinmux_set_config(PINMUX_GPIO_PU5_INDEX,
PINMUX_GPIO_PU5_FUNC_NOR); /* s/b GMI */
/* SOC and TPM reset GPIO, active low. */
gpio_output(GPIO(I5), 1);
/* SPI1 MOSI */
pinmux_set_config(PINMUX_ULPI_CLK_INDEX, PINMUX_ULPI_CLK_FUNC_SPI1 |
PINMUX_PULL_NONE |
PINMUX_INPUT_ENABLE);
/* SPI1 MISO */
pinmux_set_config(PINMUX_ULPI_DIR_INDEX, PINMUX_ULPI_DIR_FUNC_SPI1 |
PINMUX_PULL_NONE |
PINMUX_INPUT_ENABLE);
/* SPI1 SCLK */
pinmux_set_config(PINMUX_ULPI_NXT_INDEX, PINMUX_ULPI_NXT_FUNC_SPI1 |
PINMUX_PULL_NONE |
PINMUX_INPUT_ENABLE);
/* SPI1 CS0 */
pinmux_set_config(PINMUX_ULPI_STP_INDEX, PINMUX_ULPI_STP_FUNC_SPI1 |
PINMUX_PULL_NONE |
PINMUX_INPUT_ENABLE);
/* I2C3 (cam) clock. */
pinmux_set_config(PINMUX_CAM_I2C_SCL_INDEX,
PINMUX_CAM_I2C_SCL_FUNC_I2C3 | PINMUX_INPUT_ENABLE);
/* I2C3 (cam) data. */
pinmux_set_config(PINMUX_CAM_I2C_SDA_INDEX,
PINMUX_CAM_I2C_SDA_FUNC_I2C3 | PINMUX_INPUT_ENABLE);
/* switch unused pin to GPIO */
gpio_set_mode(GPIO(X3), GPIO_MODE_GPIO);
gpio_set_mode(GPIO(X4), GPIO_MODE_GPIO);
gpio_set_mode(GPIO(X5), GPIO_MODE_GPIO);
gpio_set_mode(GPIO(X6), GPIO_MODE_GPIO);
gpio_set_mode(GPIO(X7), GPIO_MODE_GPIO);
gpio_set_mode(GPIO(W3), GPIO_MODE_GPIO);
}
static void configure_ec_spi_bus(void)
{
clock_configure_source(sbc1, CLK_M, 3000);
}
static void configure_tpm_i2c_bus(void)
{
clock_configure_i2c_scl_freq(i2c3, PLLP, 400);
i2c_init(2);
}
void early_mainboard_init(void)
{
clock_enable_clear_reset(0, CLK_H_SBC1, CLK_U_I2C3, 0, 0, 0);
setup_pinmux();
configure_ec_spi_bus();
configure_tpm_i2c_bus();
}
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