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/*
* Copyright (c) 2016 Linaro Limited.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#include "soc.h"
#include <device.h>
#include <misc/util.h>
#include <pinmux/stm32/pinmux_stm32.h>
#include <drivers/clock_control/stm32_clock_control.h>
static const stm32_pin_func_t pin_pa9_funcs[] = {
[STM32F4_PINMUX_FUNC_PA9_USART1_TX - 1] =
STM32F4X_PIN_CONFIG_AF_PUSH_UP,
};
static const stm32_pin_func_t pin_pa10_funcs[] = {
[STM32F4_PINMUX_FUNC_PA10_USART1_RX - 1] =
STM32F4X_PIN_CONFIG_AF_PUSH_UP,
};
static const stm32_pin_func_t pin_pb6_funcs[] = {
[STM32F4_PINMUX_FUNC_PB6_USART1_TX - 1] =
STM32F4X_PIN_CONFIG_AF_PUSH_UP,
};
static const stm32_pin_func_t pin_pb7_funcs[] = {
[STM32F4_PINMUX_FUNC_PB7_USART1_RX - 1] =
STM32F4X_PIN_CONFIG_AF_PUSH_UP,
};
static const stm32_pin_func_t pin_pa2_funcs[] = {
[STM32F4_PINMUX_FUNC_PA2_USART2_TX - 1] =
STM32F4X_PIN_CONFIG_AF_PUSH_UP,
};
static const stm32_pin_func_t pin_pa3_funcs[] = {
[STM32F4_PINMUX_FUNC_PA3_USART2_RX - 1] =
STM32F4X_PIN_CONFIG_AF_PUSH_UP,
};
static const stm32_pin_func_t pin_pa0_funcs[] = {
[STM32F4_PINMUX_FUNC_PA0_PWM2_CH1 - 1] =
STM32F4X_PIN_CONFIG_AF_PUSH_UP,
};
/**
* @brief pin configuration
*/
static const struct stm32_pinmux_conf pins[] = {
STM32_PIN_CONF(STM32_PIN_PA9, pin_pa9_funcs),
STM32_PIN_CONF(STM32_PIN_PA10, pin_pa10_funcs),
STM32_PIN_CONF(STM32_PIN_PB6, pin_pb6_funcs),
STM32_PIN_CONF(STM32_PIN_PB7, pin_pb7_funcs),
STM32_PIN_CONF(STM32_PIN_PA2, pin_pa2_funcs),
STM32_PIN_CONF(STM32_PIN_PA3, pin_pa3_funcs),
STM32_PIN_CONF(STM32_PIN_PA0, pin_pa0_funcs),
};
int stm32_get_pin_config(int pin, int func)
{
/* GPIO function is always available, to save space it is not
* listed in alternate functions array
*/
if (func == STM32_PINMUX_FUNC_GPIO) {
return STM32F4X_PIN_CONFIG_BIAS_HIGH_IMPEDANCE;
}
/* analog function is another 'known' setting */
if (func == STM32_PINMUX_FUNC_ANALOG) {
return STM32F4X_PIN_CONFIG_ANALOG;
}
func -= 1;
for (int i = 0; i < ARRAY_SIZE(pins); i++) {
if (pins[i].pin == pin) {
if (func > pins[i].nfuncs) {
return -EINVAL;
}
return pins[i].funcs[func];
}
}
return -EINVAL;
}
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