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/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Snow board-specific configuration */
#include "board.h"
#include "common.h"
#include "dma.h"
#include "gpio.h"
#include "registers.h"
#include "spi.h"
#include "util.h"
#define GPIO_KB_INPUT (GPIO_INPUT | GPIO_PULL_UP | GPIO_INT_BOTH)
#define GPIO_KB_OUTPUT (GPIO_OUTPUT | GPIO_OPEN_DRAIN)
/* GPIO interrupt handlers prototypes */
#ifndef CONFIG_TASK_GAIAPOWER
#define gaia_power_event NULL
#else
void gaia_power_event(enum gpio_signal signal);
#endif
#ifndef CONFIG_TASK_KEYSCAN
#define matrix_interrupt NULL
#endif
/* GPIO signal list. Must match order from enum gpio_signal. */
const struct gpio_info gpio_list[GPIO_COUNT] = {
/* Inputs with interrupt handlers are first for efficiency */
{"KB_PWR_ON_L", GPIO_B, (1<<5), GPIO_INT_BOTH, gaia_power_event},
{"PP1800_LDO2", GPIO_A, (1<<1), GPIO_INT_BOTH, gaia_power_event},
{"XPSHOLD", GPIO_A, (1<<3), GPIO_INT_RISING, gaia_power_event},
{"CHARGER_INT", GPIO_C, (1<<4), GPIO_INT_RISING, NULL},
{"LID_OPEN", GPIO_C, (1<<13), GPIO_INT_BOTH, NULL},
{"KB_IN00", GPIO_C, (1<<8), GPIO_KB_INPUT, matrix_interrupt},
{"KB_IN01", GPIO_C, (1<<9), GPIO_KB_INPUT, matrix_interrupt},
{"KB_IN02", GPIO_C, (1<<10), GPIO_KB_INPUT, matrix_interrupt},
{"KB_IN03", GPIO_C, (1<<11), GPIO_KB_INPUT, matrix_interrupt},
{"KB_IN04", GPIO_C, (1<<12), GPIO_KB_INPUT, matrix_interrupt},
{"KB_IN05", GPIO_C, (1<<14), GPIO_KB_INPUT, matrix_interrupt},
{"KB_IN06", GPIO_C, (1<<15), GPIO_KB_INPUT, matrix_interrupt},
{"KB_IN07", GPIO_D, (1<<2), GPIO_KB_INPUT, matrix_interrupt},
/* Other inputs */
{"SPI1_NSS", GPIO_A, (1<<4), GPIO_INT_RISING, NULL},
/* Outputs */
{"EN_PP1350", GPIO_A, (1<<2), GPIO_OUT_LOW, NULL},
{"EN_PP5000", GPIO_A, (1<<11), GPIO_OUT_LOW, NULL},
{"EN_PP3300", GPIO_A, (1<<8), GPIO_OUT_LOW, NULL},
{"PMIC_PWRON_L",GPIO_A, (1<<12), GPIO_OUT_HIGH, NULL},
{"CHARGER_EN", GPIO_B, (1<<2), GPIO_OUT_LOW, NULL},
{"EC_INT", GPIO_B, (1<<9), GPIO_HI_Z, NULL},
{"KB_OUT00", GPIO_B, (1<<0), GPIO_KB_OUTPUT, NULL},
{"KB_OUT01", GPIO_B, (1<<8), GPIO_KB_OUTPUT, NULL},
{"KB_OUT02", GPIO_B, (1<<12), GPIO_KB_OUTPUT, NULL},
{"KB_OUT03", GPIO_B, (1<<13), GPIO_KB_OUTPUT, NULL},
{"KB_OUT04", GPIO_B, (1<<14), GPIO_KB_OUTPUT, NULL},
{"KB_OUT05", GPIO_B, (1<<15), GPIO_KB_OUTPUT, NULL},
{"KB_OUT06", GPIO_C, (1<<0), GPIO_KB_OUTPUT, NULL},
{"KB_OUT07", GPIO_C, (1<<1), GPIO_KB_OUTPUT, NULL},
{"KB_OUT08", GPIO_C, (1<<2), GPIO_KB_OUTPUT, NULL},
{"KB_OUT09", GPIO_B, (1<<1), GPIO_KB_OUTPUT, NULL},
{"KB_OUT10", GPIO_C, (1<<5), GPIO_KB_OUTPUT, NULL},
{"KB_OUT11", GPIO_C, (1<<6), GPIO_KB_OUTPUT, NULL},
{"KB_OUT12", GPIO_C, (1<<7), GPIO_KB_OUTPUT, NULL},
};
void configure_board(void)
{
uint32_t val;
dma_init();
/* Enable all GPIOs clocks
* TODO: more fine-grained enabling for power saving
*/
STM32_RCC_APB2ENR |= 0x1fd;
/* Enable SPI */
STM32_RCC_APB2ENR |= (1<<12);
/* SPI1 on pins PA4-7 (alt. function push-pull, 10MHz) */
val = STM32_GPIO_CRL_OFF(GPIO_A) & ~0xffff0000;
val |= 0x99990000;
STM32_GPIO_CRL_OFF(GPIO_A) = val;
/*
* I2C SCL/SDA on PB10-11, bi-directional, no pull-up/down, initialized
* as hi-Z until alt. function is set
*/
val = STM32_GPIO_CRH_OFF(GPIO_B) & ~0x0000ff00;
val |= 0x0000dd00;
STM32_GPIO_CRH_OFF(GPIO_B) = val;
STM32_GPIO_BSRR_OFF(GPIO_B) |= (1<<11) | (1<<10);
/* Select Alternate function for USART1 on pins PA9/PA10 */
val = STM32_GPIO_CRH_OFF(GPIO_A) & ~0x00000ff0;
val |= 0x00000990;
STM32_GPIO_CRH_OFF(GPIO_A) = val;
/* EC_INT is output, open-drain */
val = STM32_GPIO_CRH_OFF(GPIO_B) & ~0xf0;
val |= 0x50;
STM32_GPIO_CRH_OFF(GPIO_B) = val;
/* put GPIO in Hi-Z state */
gpio_set_level(GPIO_EC_INT, 1);
}
void board_keyboard_scan_ready(void)
{
#if 0
/* notify audio codec of keypress for noise suppression */
gpio_set_level(GPIO_CODEC_INT, 0);
gpio_set_level(GPIO_CODEC_INT, 1);
#endif
/* interrupt host by toggling EC_INT */
gpio_set_level(GPIO_EC_INT, 0);
gpio_set_level(GPIO_EC_INT, 1);
}
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