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/* Copyright 2017 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.
*/
/* Meowth Fingerprint MCU configuration */
#include "common.h"
#include "console.h"
#include "gpio.h"
#include "hooks.h"
#include "registers.h"
#include "spi.h"
#include "system.h"
#include "task.h"
#include "util.h"
#ifndef HAS_TASK_FPSENSOR
void fps_event(enum gpio_signal signal)
{
}
#endif
static void ap_deferred(void)
{
/*
* in S3: SLP_S3_L is 0 and SLP_S0_L is X.
* in S0ix: SLP_S3_L is X and SLP_S0_L is 0.
* in S0: SLP_S3_L is 1 and SLP_S0_L is 1.
* in S5/G3, the FP MCU should not be running.
*/
int running = gpio_get_level(GPIO_PCH_SLP_S3_L)
&& gpio_get_level(GPIO_PCH_SLP_S0_L);
if (running) { /* S0 */
disable_sleep(SLEEP_MASK_AP_RUN);
hook_notify(HOOK_CHIPSET_RESUME);
} else { /* S0ix/S3 */
hook_notify(HOOK_CHIPSET_SUSPEND);
enable_sleep(SLEEP_MASK_AP_RUN);
}
}
DECLARE_DEFERRED(ap_deferred);
/* PCH power state changes */
void slp_event(enum gpio_signal signal)
{
hook_call_deferred(&ap_deferred_data, 0);
}
#include "gpio_list.h"
/* SPI devices */
const struct spi_device_t spi_devices[] = {
/* Fingerprint sensor (SCLK at 4Mhz) */
{ CONFIG_SPI_FP_PORT, 3, GPIO_SPI4_NSS }
};
const unsigned int spi_devices_used = ARRAY_SIZE(spi_devices);
static void spi_configure(void)
{
/* Configure SPI GPIOs */
gpio_config_module(MODULE_SPI_MASTER, 1);
/* Set all SPI master signal pins to very high speed: pins E2/4/5/6 */
STM32_GPIO_OSPEEDR(GPIO_E) |= 0x00003f30;
/* Enable clocks to SPI4 module (master) */
STM32_RCC_APB2ENR |= STM32_RCC_PB2_SPI4;
spi_enable(CONFIG_SPI_FP_PORT, 1);
}
/* Initialize board. */
static void board_init(void)
{
/* TODO(b/75105319): re-enable STOP mode when it will fully work */
disable_sleep(SLEEP_MASK_FORCE_NO_DSLEEP);
spi_configure();
/* Enable interrupt on PCH power signals */
gpio_enable_interrupt(GPIO_PCH_SLP_S3_L);
gpio_enable_interrupt(GPIO_PCH_SLP_S0_L);
/* enable the SPI slave interface if the PCH is up */
hook_call_deferred(&ap_deferred_data, 0);
}
DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
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