| /* |
| * Copyright (c) 2020 Henrik Brix Andersen <henrik@brixandersen.dk> |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <arch/arm/aarch32/cortex_m/cmsis.h> |
| #include <device.h> |
| #include <devicetree.h> |
| #include <drivers/gpio.h> |
| #include <init.h> |
| #include <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 (!device_is_ready(mux.port)) { |
| 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(const struct device *dev) |
| { |
| ARG_UNUSED(dev); |
| |
| /* |
| * 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) */ |