blob: 984cd34ab43a420eb50419c5c6c794359fbd164d [file] [log] [blame]
/*
* Copyright (c) 2020 Henrik Brix Andersen <henrik@brixandersen.dk>
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <cmsis_core.h>
#include <zephyr/device.h>
#include <zephyr/devicetree.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/init.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(board, CONFIG_LOG_DEFAULT_LEVEL);
#include "board.h"
#define DAPLINK_QSPI_MUX_NODE DT_NODELABEL(daplink_qspi_mux)
#if DT_NODE_HAS_STATUS(DAPLINK_QSPI_MUX_NODE, okay)
int board_daplink_qspi_mux_select(enum board_daplink_qspi_mux_mode mode)
{
struct gpio_dt_spec mux = GPIO_DT_SPEC_GET(DAPLINK_QSPI_MUX_NODE, mux_gpios);
gpio_flags_t flags = 0;
int err;
switch (mode) {
case BOARD_DAPLINK_QSPI_MUX_MODE_XIP:
flags = GPIO_OUTPUT_LOW;
break;
case BOARD_DAPLINK_QSPI_MUX_MODE_NORMAL:
flags = GPIO_OUTPUT_HIGH;
break;
default:
__ASSERT(0, "invalid mode");
return -EINVAL;
}
if (!gpio_is_ready_dt(&mux)) {
LOG_ERR("DAPLink QSPI MUX GPIO device not ready");
return -EINVAL;
}
err = gpio_pin_configure_dt(&mux, flags);
if (err) {
LOG_ERR("failed to configure DAPLink QSPI MUX GPIO (err %d)",
err);
return err;
}
return 0;
}
bool board_daplink_is_fitted(void)
{
/*
* The DAPLINK_fitted_n signal is routed to an IRQ line. It is used as a
* level-detect non-interrupt signal to determine if the DAPLink shield
* is fitted.
*/
return !NVIC_GetPendingIRQ(DT_IRQN(DAPLINK_QSPI_MUX_NODE));
}
static int board_init(void)
{
/*
* Automatically select normal mode unless the DAPLink shield is fitted
* in which case the CPU will have the off-board QSPI NOR flash
* memory-mapped at 0x0.
*/
if (!board_daplink_is_fitted()) {
board_daplink_qspi_mux_select(
BOARD_DAPLINK_QSPI_MUX_MODE_NORMAL);
}
return 0;
}
SYS_INIT(board_init, POST_KERNEL, CONFIG_BOARD_INIT_PRIORITY);
#endif /* DT_NODE_HAS_STATUS(DAPLINK_QSPI_MUX_NODE, okay) */