blob: 991d75b894eb8c927d6cfe60f0b33abace82f572 [file] [log] [blame]
/*
* Copyright (c) 2020 Linumiz
* Author: Parthiban Nallathambi <parthiban@linumiz.com>
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT infineon_xmc4xxx_uart
#include <xmc_gpio.h>
#include <xmc_uart.h>
#include <drivers/uart.h>
struct uart_xmc4xxx_data {
XMC_UART_CH_CONFIG_t config;
};
#define DEV_CFG(dev) \
((const struct uart_device_config * const)(dev)->config)
#define DEV_DATA(dev) \
((struct uart_xmc4xxx_data * const)(dev)->data)
static int uart_xmc4xxx_poll_in(const struct device *dev, unsigned char *c)
{
const struct uart_device_config *config = DEV_CFG(dev);
*(uint16_t *)c =
XMC_UART_CH_GetReceivedData((XMC_USIC_CH_t *)config->base);
return 0;
}
static void uart_xmc4xxx_poll_out(const struct device *dev, unsigned char c)
{
const struct uart_device_config *config = DEV_CFG(dev);
XMC_UART_CH_Transmit((XMC_USIC_CH_t *)config->base, (uint16_t)c);
}
static int uart_xmc4xxx_init(const struct device *dev)
{
const struct uart_device_config *config = DEV_CFG(dev);
struct uart_xmc4xxx_data *data = DEV_DATA(dev);
XMC_USIC_CH_t *uart = (XMC_USIC_CH_t *)config->base;
data->config.data_bits = 8U;
data->config.stop_bits = 1U;
/* configure PIN 0.0 and 0.1 as UART */
XMC_UART_CH_Init(uart, &(data->config));
XMC_GPIO_SetMode(P0_0, XMC_GPIO_MODE_INPUT_TRISTATE);
XMC_UART_CH_SetInputSource(uart, XMC_UART_CH_INPUT_RXD,
USIC1_C1_DX0_P0_0);
XMC_UART_CH_Start(uart);
XMC_GPIO_SetMode(P0_1,
XMC_GPIO_MODE_OUTPUT_PUSH_PULL | P0_1_AF_U1C1_DOUT0);
return 0;
}
static const struct uart_driver_api uart_xmc4xxx_driver_api = {
.poll_in = uart_xmc4xxx_poll_in,
.poll_out = uart_xmc4xxx_poll_out,
};
#define XMC4XXX_INIT(index) \
static struct uart_xmc4xxx_data xmc4xxx_data_##index = { \
.config.baudrate = DT_INST_PROP(index, current_speed) \
}; \
\
static const struct uart_device_config xmc4xxx_config_##index = { \
.base = (void *)DT_INST_REG_ADDR(index), \
}; \
\
DEVICE_DT_INST_DEFINE(index, &uart_xmc4xxx_init, \
NULL, \
&xmc4xxx_data_##index, \
&xmc4xxx_config_##index, PRE_KERNEL_1, \
CONFIG_SERIAL_INIT_PRIORITY, \
&uart_xmc4xxx_driver_api);
DT_INST_FOREACH_STATUS_OKAY(XMC4XXX_INIT)