166 lines
3.4 KiB
C
166 lines
3.4 KiB
C
/*
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* Copyright (c) 2019-2020, Xim
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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*/
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#include <rthw.h>
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#include <rtdevice.h>
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#include "board.h"
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#include "drv_uart.h"
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#include <stdio.h>
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#include "sbi.h"
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#define UART_DEFAULT_BAUDRATE 115200
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struct device_uart
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{
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rt_ubase_t hw_base;
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rt_uint32_t irqno;
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};
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static rt_err_t rt_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg);
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static rt_err_t uart_control(struct rt_serial_device *serial, int cmd, void *arg);
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static int drv_uart_putc(struct rt_serial_device *serial, char c);
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static int drv_uart_getc(struct rt_serial_device *serial);
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const struct rt_uart_ops _uart_ops =
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{
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rt_uart_configure,
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uart_control,
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drv_uart_putc,
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drv_uart_getc,
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//TODO: add DMA support
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RT_NULL
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};
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void uart_init(void)
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{
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return ;
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}
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struct rt_serial_device serial1;
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struct device_uart uart1;
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/*
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* UART interface
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*/
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static rt_err_t rt_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
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{
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struct device_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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serial->config = *cfg;
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return (RT_EOK);
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}
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#define UART_LSR_DR 0x01 /* Data ready */
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#define UART_LSR_THRE 0x20 /* Xmit holding register empty */
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#define UART_RBR(hw) HWREG32(hw + 0x00)
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#define UART_IER(hw) HWREG32(hw + 0x04)
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#define UART_LSR(hw) HWREG32(hw + 0x14)
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static volatile uint64_t uart_hwbase = 0x10000000;
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void uart_putc(char c)
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{
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while ((UART_LSR(uart_hwbase) & UART_LSR_THRE) == 0);
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UART_RBR(uart_hwbase) = c;
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}
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static rt_err_t uart_control(struct rt_serial_device *serial, int cmd, void *arg)
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{
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struct device_uart *uart;
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uart = serial->parent.user_data;
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rt_uint32_t channel = 1;
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RT_ASSERT(uart != RT_NULL);
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RT_ASSERT(channel != 3);
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switch (cmd)
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{
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case RT_DEVICE_CTRL_CLR_INT:
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break;
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case RT_DEVICE_CTRL_SET_INT:
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break;
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}
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return (RT_EOK);
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}
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static int drv_uart_putc(struct rt_serial_device *serial, char c)
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{
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sbi_console_putchar(c);
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return (1);
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}
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static int drv_uart_getc(struct rt_serial_device *serial)
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{
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return sbi_console_getchar();
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}
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char rt_hw_console_getchar(void)
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{
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return sbi_console_getchar();
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}
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static void uart_rx(void *param)
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{
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struct rt_serial_device *serial = (struct rt_serial_device *)param;
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while(1)
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{
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rt_hw_serial_isr((struct rt_serial_device *)serial,RT_SERIAL_EVENT_RX_IND);
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rt_thread_mdelay(10);
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}
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}
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void rt_hw_uart_start_rx_thread()
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{
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rt_thread_t th;
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RT_ASSERT((th = rt_thread_create("uartrx",uart_rx,(void *)&serial1,8192,8,20)) != RT_NULL);
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RT_ASSERT(rt_thread_startup(th) == RT_EOK);
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}
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/*
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* UART Initiation
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*/
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int rt_hw_uart_init(void)
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{
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struct rt_serial_device *serial;
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struct device_uart *uart;
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struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
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{
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serial = &serial1;
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uart = &uart1;
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serial->ops = &_uart_ops;
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serial->config = config;
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serial->config.baud_rate = UART_DEFAULT_BAUDRATE;
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uart->hw_base = 0x10000000;
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uart->irqno = 0xa;
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rt_hw_serial_register(serial,
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"uart",
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RT_DEVICE_FLAG_STREAM | RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
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uart);
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}
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return 0;
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}
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/* WEAK for SDK 0.5.6 */
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RT_WEAK void uart_debug_init(int uart_channel)
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{
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}
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