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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021/04/22 Juice Add UART0 support for JuiceVm.
*/
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
#include "board.h"
#include "drv_uart.h"
#include "rv_mtvec_map.h"
struct rt_serial_device *serial;
char *device_name = "uart0";
static rt_err_t uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg);
static rt_err_t uart_control(struct rt_serial_device *serial, int cmd, void *arg);
static int uart_putc(struct rt_serial_device *serial, char c);
static int uart_getc(struct rt_serial_device *serial);
static rt_ssize_t uart_dma_transmit(struct rt_serial_device *serial, rt_uint8_t *buf, rt_size_t size, int direction);
void UART0_DriverIRQHandler(void);
const struct rt_uart_ops _uart_ops =
{
uart_configure,
uart_control,
uart_putc,
uart_getc,
uart_dma_transmit
};
static void uart_isr(struct rt_serial_device *serial);
#if defined(BSP_USING_UART0)
struct rt_serial_device serial0;
void UART0_DriverIRQHandler(void)
{
uart_isr(&serial0);
}
#endif
/*
* UART Initiation
*/
int rt_hw_uart_init(void)
{
int i;
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
serial = &serial0;
serial->ops = &_uart_ops;
serial->config = config;
/* register UART device */
rt_hw_serial_register(serial,
device_name,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
(void *)0);
return 0;
}
/*
* UART interface
*/
static rt_err_t uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
return RT_EOK;
}
static rt_err_t uart_control(struct rt_serial_device *serial, int cmd, void *arg)
{
RT_ASSERT(serial != RT_NULL);
return RT_EOK;
}
static int uart_putc(struct rt_serial_device *serial, char c)
{
RT_ASSERT(serial != RT_NULL);
*((char *)(pdev_uart0_write_addr)) = c;
return (1);
}
static int uart_getc(struct rt_serial_device *serial)
{
int ch;
RT_ASSERT(serial != RT_NULL);
ch = -1;
if (*(char *)(pdev_uart0_state_addr) == pdev_uart0_readbusy_state)
{
ch = *(char *)(pdev_uart0_read_addr);
*(char *)(pdev_uart0_state_addr) = pdev_uart0_free_state;
}
return ch;
}
static rt_ssize_t uart_dma_transmit(struct rt_serial_device *serial, rt_uint8_t *buf, rt_size_t size, int direction)
{
return (0);
}
/* UART ISR */
/**
* Uart common interrupt process. This need add to uart ISR.
*
* @param serial serial device
*/
static void uart_isr(struct rt_serial_device *serial)
{
RT_ASSERT(serial != RT_NULL);
if (*(char *)(pdev_uart0_state_addr) == pdev_uart0_readbusy_state)
{
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
}
}
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