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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022/12/25 flyingcys first version
*/
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
#include "board.h"
#include "drv_uart.h"
#ifdef RT_USING_SMART
#include <ioremap.h>
#endif
#define DBG_TAG "DRV.UART"
#define DBG_LVL DBG_WARNING
#include <rtdbg.h>
#define UART_DEFAULT_BAUDRATE 2000000
struct device_uart
{
struct rt_serial_device serial;
struct bflb_device_s *bflb_device;
};
static void uart_irq_handler(int irq, void *arg)
{
struct rt_serial_device *serial = (struct rt_serial_device *)arg;
RT_ASSERT(serial != RT_NULL);
struct device_uart *uart = serial->parent.user_data;
RT_ASSERT(uart != RT_NULL);
RT_ASSERT(uart->bflb_device != RT_NULL);
uint32_t intstatus = bflb_uart_get_intstatus(uart->bflb_device);
if (intstatus & UART_INTSTS_RX_FIFO)
{
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
}
if (intstatus & UART_INTSTS_RTO)
{
bflb_uart_int_clear(uart->bflb_device, UART_INTCLR_RTO);
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
}
}
static rt_err_t _uart_configure(struct rt_serial_device *serial, struct serial_configure *serial_cfg)
{
struct device_uart *uart = RT_NULL;
struct bflb_uart_config_s uart_cfg;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(serial_cfg != RT_NULL);
uart = serial->parent.user_data;
RT_ASSERT(uart != RT_NULL);
RT_ASSERT(uart->bflb_device != RT_NULL);
uart_cfg.baudrate = UART_DEFAULT_BAUDRATE;
uart_cfg.data_bits = UART_DATA_BITS_8;
uart_cfg.stop_bits = UART_STOP_BITS_1;
uart_cfg.parity = UART_PARITY_NONE;
uart_cfg.flow_ctrl = 0;
uart_cfg.tx_fifo_threshold = 7;
uart_cfg.rx_fifo_threshold = 7;
uart_cfg.baudrate = serial_cfg->baud_rate;
switch (serial_cfg->data_bits)
{
case DATA_BITS_5:
uart_cfg.data_bits = UART_DATA_BITS_5;
break;
case DATA_BITS_6:
uart_cfg.data_bits = UART_DATA_BITS_6;
break;
case DATA_BITS_7:
uart_cfg.data_bits = UART_DATA_BITS_7;
break;
case DATA_BITS_8:
uart_cfg.data_bits = UART_DATA_BITS_8;
break;
default:
uart_cfg.data_bits = UART_DATA_BITS_8;
break;
}
switch (serial_cfg->stop_bits)
{
case STOP_BITS_1:
uart_cfg.stop_bits = UART_STOP_BITS_1;
break;
case STOP_BITS_2:
uart_cfg.stop_bits = UART_STOP_BITS_2;
break;
default:
uart_cfg.stop_bits = UART_STOP_BITS_1;
break;
}
switch (serial_cfg->parity)
{
case PARITY_NONE:
uart_cfg.parity = UART_PARITY_NONE;
break;
case PARITY_ODD:
uart_cfg.parity = UART_PARITY_ODD;
break;
case PARITY_EVEN:
uart_cfg.parity = UART_PARITY_EVEN;
break;
default:
uart_cfg.parity = UART_PARITY_NONE;
break;
}
bflb_uart_init(uart->bflb_device, &uart_cfg);
return RT_EOK;
}
static rt_err_t _uart_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct device_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = serial->parent.user_data;
RT_ASSERT(uart != RT_NULL);
RT_ASSERT(uart->bflb_device != RT_NULL);
switch (cmd)
{
/* disable interrupt */
case RT_DEVICE_CTRL_CLR_INT:
bflb_uart_rxint_mask(uart->bflb_device, true);
#ifdef BL808_CORE_D0
rt_hw_interrupt_mask(uart->bflb_device->irq_num);
rt_hw_interrupt_install(uart->bflb_device->irq_num, RT_NULL, serial, RT_NULL);
#else
bflb_irq_disable(uart->bflb_device->irq_num);
bflb_irq_attach(uart->bflb_device->irq_num, RT_NULL, RT_NULL);
#endif
break;
/* enable interrupt */
case RT_DEVICE_CTRL_SET_INT:
bflb_uart_rxint_mask(uart->bflb_device, false);
#ifdef BL808_CORE_D0
rt_hw_interrupt_install(uart->bflb_device->irq_num, uart_irq_handler, serial, RT_NULL);
rt_hw_interrupt_umask(uart->bflb_device->irq_num);
#else
bflb_irq_attach(uart->bflb_device->irq_num, uart_irq_handler, serial);
bflb_irq_enable(uart->bflb_device->irq_num);
#endif
break;
}
return RT_EOK;
}
static int _uart_putc(struct rt_serial_device *serial, char c)
{
struct device_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = serial->parent.user_data;
RT_ASSERT(uart != RT_NULL);
RT_ASSERT(uart->bflb_device != RT_NULL);
bflb_uart_putchar(uart->bflb_device, c);
return 1;
}
static int _uart_getc(struct rt_serial_device *serial)
{
int ch = -1;
struct device_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = serial->parent.user_data;
RT_ASSERT(uart != RT_NULL);
RT_ASSERT(uart->bflb_device != RT_NULL);
ch = bflb_uart_getchar(uart->bflb_device);
return ch;
}
static const struct rt_uart_ops _uart_ops =
{
.configure = _uart_configure,
.control = _uart_control,
.putc = _uart_putc,
.getc = _uart_getc,
.dma_transmit = RT_NULL
};
static void _uart_init(const char *name, struct device_uart *uart, rt_uint32_t flag)
{
rt_err_t result = RT_EOK;
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
struct rt_serial_device *serial;
serial = &uart->serial;
serial->ops = &_uart_ops;
serial->config = config;
serial->config.baud_rate = UART_DEFAULT_BAUDRATE;
/* register USART device */
result = rt_hw_serial_register(serial,
name,
flag,
uart);
RT_ASSERT(result == RT_EOK);
}
/*
* UART Initiation
*/
int rt_hw_uart_init(void)
{
struct bflb_device_s *gpio;
rt_uint32_t flag;
gpio = bflb_device_get_by_name("gpio");
#ifdef BSP_USING_UART0
static struct device_uart bl_uart0;
bl_uart0.bflb_device = bflb_device_get_by_name("uart0");
bflb_gpio_uart_init(gpio, UART0_GPIO_TX, GPIO_UART_FUNC_UART0_TX);
bflb_gpio_uart_init(gpio, UART0_GPIO_RX, GPIO_UART_FUNC_UART0_RX);
flag = RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX;
_uart_init("uart0", &bl_uart0, flag);
#endif
#ifdef BSP_USING_UART1
static struct device_uart bl_uart1;
bl_uart1.bflb_device = bflb_device_get_by_name("uart1");
bflb_gpio_uart_init(gpio, UART1_GPIO_TX, GPIO_UART_FUNC_UART1_TX);
bflb_gpio_uart_init(gpio, UART1_GPIO_RX, GPIO_UART_FUNC_UART1_RX);
flag = RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX;
_uart_init("uart1", &bl_uart1, flag);
#endif
#ifdef BSP_USING_UART2
static struct device_uart bl_uart2;
bl_uart2.bflb_device = bflb_device_get_by_name("uart2");
bflb_gpio_uart_init(gpio, UART2_GPIO_TX, GPIO_UART_FUNC_UART2_TX);
bflb_gpio_uart_init(gpio, UART2_GPIO_RX, GPIO_UART_FUNC_UART2_RX);
flag = RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX;
_uart_init("uart2", &bl_uart2, flag);
#endif
#ifdef BSP_USING_UART3
static struct device_uart bl_uart3;
bl_uart3.bflb_device = bflb_device_get_by_name("uart3");
bflb_gpio_init(gpio, UART3_GPIO_TX, 21 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
bflb_gpio_init(gpio, UART3_GPIO_RX, 21 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
flag = RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX;
if(strcmp("uart3", RT_CONSOLE_DEVICE_NAME) == 0)
flag |= RT_DEVICE_FLAG_STREAM;
_uart_init("uart3", &bl_uart3, flag);
#endif
return 0;
}
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