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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
*/
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
#include "board.h"
#include "drv_uart.h"
#include <stdio.h>
#include <sysctl.h>
// #include "uart.h"
#include "uarths.h"
#include "plic.h"
static volatile uarths_t *const _uarths = (volatile uarths_t *)UARTHS_BASE_ADDR;
struct device_uart
{
rt_uint32_t hw_base;
rt_uint32_t irqno;
};
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 drv_uart_putc(struct rt_serial_device *serial, char c);
static int drv_uart_getc(struct rt_serial_device *serial);
static void uart_irq_handler(int irqno, void *param);
const struct rt_uart_ops _uart_ops =
{
uart_configure,
uart_control,
drv_uart_putc,
drv_uart_getc,
RT_NULL
};
/*
* UART Initiation
*/
int rt_hw_uart_init(void)
{
struct rt_serial_device *serial;
struct device_uart *uart;
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
#ifdef BSP_USING_UART_HS
{
static struct rt_serial_device serial_hs;
static struct device_uart uart_hs;
serial = &serial_hs;
uart = &uart_hs;
serial->ops = &_uart_ops;
serial->config = config;
serial->config.baud_rate = 115200;
uart->hw_base = UARTHS_BASE_ADDR;
uart->irqno = IRQN_UARTHS_INTERRUPT;
rt_hw_serial_register(serial,
"uarths",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
}
#endif
#ifdef BSP_USING_UART1
{
static struct rt_serial_device serial1;
static struct device_uart uart1;
serial = &serial1;
uart = &uart1;
serial->ops = &_uart_ops;
serial->config = config;
serial->config.baud_rate = 115200;
uart->hw_base = UART1_BASE_ADDR;
uart->irqno = IRQN_UART1_INTERRUPT;
rt_hw_serial_register(serial,
"uarths",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
}
#endif
#ifdef BSP_USING_UART2
#endif
#ifdef BSP_USING_UART3
#endif
return 0;
}
/*
* UART interface
*/
static rt_err_t uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
rt_uint32_t baud_div;
struct device_uart *uart;
uint32_t freq = sysctl_clock_get_freq(SYSCTL_CLOCK_CPU);
uint16_t div = freq / cfg->baud_rate - 1;
RT_ASSERT(serial != RT_NULL);
serial->config = *cfg;
uart = serial->parent.user_data;
RT_ASSERT(uart != RT_NULL);
if (uart->hw_base == UARTHS_BASE_ADDR)
{
_uarths->div.div = div;
_uarths->txctrl.txen = 1;
_uarths->rxctrl.rxen = 1;
_uarths->txctrl.txcnt = 0;
_uarths->rxctrl.rxcnt = 0;
_uarths->ip.txwm = 1;
_uarths->ip.rxwm = 1;
_uarths->ie.txwm = 0;
_uarths->ie.rxwm = 1;
}
else
{
/* other uart */
}
return (RT_EOK);
}
static rt_err_t uart_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct device_uart *uart;
uart = serial->parent.user_data;
RT_ASSERT(uart != RT_NULL);
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
/* Disable the UART Interrupt */
rt_hw_interrupt_mask(uart->irqno);
break;
case RT_DEVICE_CTRL_SET_INT:
/* install interrupt */
rt_hw_interrupt_install(uart->irqno, uart_irq_handler,
serial, serial->parent.parent.name);
rt_hw_interrupt_umask(uart->irqno);
break;
}
return (RT_EOK);
}
static int drv_uart_putc(struct rt_serial_device *serial, char c)
{
struct device_uart *uart;
uart = serial->parent.user_data;
if (uart->hw_base == UARTHS_BASE_ADDR)
{
while (_uarths->txdata.full);
_uarths->txdata.data = (uint8_t)c;
}
else
{
/* other uart */
}
return (1);
}
static int drv_uart_getc(struct rt_serial_device *serial)
{
int ret = -1;
struct device_uart *uart = serial->parent.user_data;
if (uart->hw_base == UARTHS_BASE_ADDR)
{
uarths_rxdata_t recv = _uarths->rxdata;
if (recv.empty)
return EOF;
else
return (recv.data & 0xff);
}
/* Receive Data Available */
return (-1);
}
/* UART ISR */
static void uart_irq_handler(int irqno, void *param)
{
rt_ubase_t isr;
struct rt_serial_device *serial = (struct rt_serial_device *)param;
struct device_uart *uart = serial->parent.user_data;
/* read interrupt status and clear it */
if (uart->hw_base == UARTHS_BASE_ADDR)
{
if (_uarths->ip.rxwm)
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
}
}
/* WEAK for SDK 0.5.6 */
RT_WEAK void uart_debug_init(int uart_channel)
{
}
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