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Diffstat (limited to 'bsp/ls1cdev/drivers/uart.c')
-rw-r--r--bsp/ls1cdev/drivers/uart.c286
1 files changed, 0 insertions, 286 deletions
diff --git a/bsp/ls1cdev/drivers/uart.c b/bsp/ls1cdev/drivers/uart.c
deleted file mode 100644
index 01bb2d0f8d..0000000000
--- a/bsp/ls1cdev/drivers/uart.c
+++ /dev/null
@@ -1,286 +0,0 @@
-/*
- * File : board.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006-2012, RT-Thread Develop Team
- *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
- *
- * Change Logs:
- * Date Author Notes
- * 2011-08-08 lgnq first version
- * 2015-07-09 chinesebear modified for loongson 1c
- */
-
-#include <rthw.h>
-#include <rtthread.h>
-
-#include "uart.h"
-
-/**
- * @addtogroup Loongson LS1B
- */
-
-/*@{*/
-
-#if defined(RT_USING_SERIAL) && defined(RT_USING_DEVICE)
-
-struct rt_uart_ls1c
-{
- struct rt_device parent;
-
- rt_uint32_t hw_base;
- rt_uint32_t irq;
-
- /* buffer for reception */
- rt_uint8_t read_index, save_index;
- rt_uint8_t rx_buffer[RT_UART_RX_BUFFER_SIZE];
-}uart_device;
-
-static void rt_uart_irqhandler(int irqno, void *param)
-{
- rt_ubase_t level;
- rt_uint8_t isr;
- struct rt_uart_ls1c *uart = &uart_device;
-
- /* read interrupt status and clear it */
- isr = UART_IIR(uart->hw_base);
- isr = (isr >> 1) & 0x3;
-
- /* receive data available */
- if (isr & 0x02)
- {
- /* Receive Data Available */
- while (UART_LSR(uart->hw_base) & UARTLSR_DR)
- {
- uart->rx_buffer[uart->save_index] = UART_DAT(uart->hw_base);
-
- level = rt_hw_interrupt_disable();
- uart->save_index ++;
- if (uart->save_index >= RT_UART_RX_BUFFER_SIZE)
- uart->save_index = 0;
- rt_hw_interrupt_enable(level);
- }
-
- /* invoke callback */
- if (uart->parent.rx_indicate != RT_NULL)
- {
- rt_size_t length;
- if (uart->read_index > uart->save_index)
- length = RT_UART_RX_BUFFER_SIZE - uart->read_index + uart->save_index;
- else
- length = uart->save_index - uart->read_index;
-
- uart->parent.rx_indicate(&uart->parent, length);
- }
- }
-
- return;
-}
-
-static rt_err_t rt_uart_init(rt_device_t dev)
-{
- rt_uint32_t baud_div;
- struct rt_uart_ls1c *uart = (struct rt_uart_ls1c *)dev;
-
- RT_ASSERT(uart != RT_NULL);
-
-//#if 0
- /* init UART Hardware */
- UART_IER(uart->hw_base) = 0; /* clear interrupt */
- UART_FCR(uart->hw_base) = 0xc3; /* reset UART Rx/Tx */
-
- /* enable UART clock */
- /* set databits, stopbits and parity. (8-bit data, 1 stopbit, no parity) */
- UART_LCR(uart->hw_base) = 0x80;
-
- /* set baudrate */
- baud_div = DEV_CLK / 16 / UART_BAUDRATE /2;
-
- UART_MSB(uart->hw_base) = (baud_div >> 8) & 0xff;
- UART_LSB(uart->hw_base) = baud_div & 0xff;
-
- UART_LCR(uart->hw_base) = 0x03;
-
- /* Enable UART unit, enable and clear FIFO */
- //UART_FCR(uart->hw_base) = UARTFCR_UUE | UARTFCR_FE | UARTFCR_TFLS | UARTFCR_RFLS;
-
- /* enable RX interrupt */
- UART_IER(uart->hw_base) = UARTIER_IRXE|UARTIER_ILE;
-
-//#endif
-
- return RT_EOK;
-}
-
-static rt_err_t rt_uart_open(rt_device_t dev, rt_uint16_t oflag)
-{
- struct rt_uart_ls1c *uart = (struct rt_uart_ls1c *)dev;
-
- RT_ASSERT(uart != RT_NULL);
- if (dev->flag & RT_DEVICE_FLAG_INT_RX)
- {
- /* Enable the UART Interrupt */
- UART_IER(uart->hw_base) |= UARTIER_IRXE;
-
- /* install interrupt */
- rt_hw_interrupt_install(uart->irq, rt_uart_irqhandler, RT_NULL, "UART");
- rt_hw_interrupt_umask(uart->irq);
- }
- return RT_EOK;
-}
-
-static rt_err_t rt_uart_close(rt_device_t dev)
-{
- struct rt_uart_ls1c *uart = (struct rt_uart_ls1c *)dev;
-
- RT_ASSERT(uart != RT_NULL);
- if (dev->flag & RT_DEVICE_FLAG_INT_RX)
- {
- /* Disable the UART Interrupt */
- UART_IER(uart->hw_base) &= ~(UARTIER_IRXE);
- }
-
- return RT_EOK;
-}
-
-static rt_size_t rt_uart_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
-{
- rt_uint8_t *ptr;
- struct rt_uart_ls1c *uart = (struct rt_uart_ls1c *)dev;
-
- RT_ASSERT(uart != RT_NULL);
-
- /* point to buffer */
- ptr = (rt_uint8_t *)buffer;
- if (dev->flag & RT_DEVICE_FLAG_INT_RX)
- {
- while (size)
- {
- /* interrupt receive */
- rt_base_t level;
-
- /* disable interrupt */
- level = rt_hw_interrupt_disable();
- if (uart->read_index != uart->save_index)
- {
- *ptr = uart->rx_buffer[uart->read_index];
-
- uart->read_index ++;
- if (uart->read_index >= RT_UART_RX_BUFFER_SIZE)
- uart->read_index = 0;
- }
- else
- {
- /* no data in rx buffer */
-
- /* enable interrupt */
- rt_hw_interrupt_enable(level);
- break;
- }
-
- /* enable interrupt */
- rt_hw_interrupt_enable(level);
-
- ptr ++;
- size --;
- }
-
- return (rt_uint32_t)ptr - (rt_uint32_t)buffer;
- }
-
- return 0;
-}
-
-static rt_size_t rt_uart_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
-{
- char *ptr;
- struct rt_uart_ls1c *uart = (struct rt_uart_ls1c *)dev;
-
- RT_ASSERT(uart != RT_NULL);
-
- ptr = (char *)buffer;
-
- if (dev->flag & RT_DEVICE_FLAG_STREAM)
- {
- /* stream mode */
- while (size)
- {
- if (*ptr == '\n')
- {
- /* FIFO status, contain valid data */
- while (!(UART_LSR(uart->hw_base) & (UARTLSR_TE | UARTLSR_TFE)));
- /* write data */
- UART_DAT(uart->hw_base) = '\r';
- }
-
- /* FIFO status, contain valid data */
- while (!(UART_LSR(uart->hw_base) & (UARTLSR_TE | UARTLSR_TFE)));
- /* write data */
- UART_DAT(uart->hw_base) = *ptr;
-
- ptr ++;
- size --;
- }
- }
- else
- {
- while (size != 0)
- {
- /* FIFO status, contain valid data */
- while (!(UART_LSR(uart->hw_base) & (UARTLSR_TE | UARTLSR_TFE)));
-
- /* write data */
- UART_DAT(uart->hw_base) = *ptr;
-
- ptr++;
- size--;
- }
- }
-
- return (rt_size_t)ptr - (rt_size_t)buffer;
-}
-
-void rt_hw_uart_init(void)
-{
- struct rt_uart_ls1c *uart;
-
- /* get uart device */
- uart = &uart_device;
-
- /* device initialization */
- uart->parent.type = RT_Device_Class_Char;
- rt_memset(uart->rx_buffer, 0, sizeof(uart->rx_buffer));
- uart->read_index = uart->save_index = 0;
-
-#if defined(RT_USING_UART0)
- uart->hw_base = UART0_BASE;
- uart->irq = LS1C_UART0_IRQ;
-#elif defined(RT_USING_UART2)
- uart->hw_base = UART2_BASE;
- uart->irq = LS1C_UART2_IRQ;
-#elif defined(RT_USING_UART3)
- uart->hw_base = UART3_BASE;
- uart->irq = LS1C_UART3_IRQ;
-#endif
-
- /* device interface */
- uart->parent.init = rt_uart_init;
- uart->parent.open = rt_uart_open;
- uart->parent.close = rt_uart_close;
- uart->parent.read = rt_uart_read;
- uart->parent.write = rt_uart_write;
- uart->parent.control = RT_NULL;
- uart->parent.user_data = RT_NULL;
-
- rt_device_register(&uart->parent, "uart2",
- RT_DEVICE_FLAG_RDWR |
- RT_DEVICE_FLAG_STREAM |
- RT_DEVICE_FLAG_INT_RX);
-}
-#endif /* end of UART */
-
-
-
-/*@}*/
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