bsp:ls1b:rework uart driver and fix some bugs to make it work. tested on ls1b dev board which make by Loongson(GuangZhou)

1 files changed, 222 insertions, 0 deletions

diff --git a/bsp/ls1bdev/drivers/drv_uart.c b/bsp/ls1bdev/drivers/drv_uart.c
new file mode 100644
index 0000000000..8f469f26ed
--- /dev/null
+++ b/bsp/ls1bdev/drivers/drv_uart.c
@@ -0,0 +1,222 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018-05-08     zhuangwei    the first version
+ * 2021-02-02     [email protected]    adapt to ls1b
+ */
+#include <rtthread.h>
+#include <rtdevice.h>
+#include <rthw.h>
+#include "drv_uart.h"
+#include "ls1b_pin.h"
+#include "ls1b_uart.h"
+
+/* STM32 uart driver */
+struct rt_uart_ls1b
+{
+    ls1b_uart_t UARTx;
+    rt_uint32_t IRQ;
+};
+
+static rt_err_t ls1b_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
+{
+    struct rt_uart_ls1b *uart_dev = RT_NULL;
+    ls1b_uart_info_t uart_info = {0};
+
+    RT_ASSERT(serial != RT_NULL);
+    RT_ASSERT(cfg != RT_NULL);
+
+    uart_dev = (struct rt_uart_ls1b *)serial->parent.user_data;
+
+    // 初始化串口
+    uart_info.UARTx    = uart_dev->UARTx;
+    uart_info.baudrate = cfg->baud_rate;
+    uart_info.rx_enable = TRUE;
+    uart_init(&uart_info);
+
+    return RT_EOK;
+
+}
+
+static rt_err_t ls1b_uart_control(struct rt_serial_device *serial, int cmd, void *arg)
+{
+    struct rt_uart_ls1b *uart_dev = RT_NULL;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart_dev = (struct rt_uart_ls1b *)serial->parent.user_data;
+
+    switch (cmd)
+    {
+    case RT_DEVICE_CTRL_CLR_INT: /* disable rx irq */
+        rt_hw_interrupt_mask(uart_dev->IRQ);
+        break;
+
+    case RT_DEVICE_CTRL_SET_INT: /* enable rx irq */
+        rt_hw_interrupt_umask(uart_dev->IRQ);
+        break;
+
+    default:
+        break;
+    }
+
+    return RT_EOK;
+
+}
+
+static int ls1b_uart_putc(struct rt_serial_device *serial, char c)
+{
+    struct rt_uart_ls1b *uart_dev = RT_NULL;
+
+    RT_ASSERT(serial != RT_NULL);
+
+    uart_dev = (struct rt_uart_ls1b *)serial->parent.user_data;
+    uart_putc(uart_dev->UARTx, c);
+
+    return 1;
+}
+
+static int ls1b_uart_getc(struct rt_serial_device *serial)
+{
+    struct rt_uart_ls1b *uart_dev = RT_NULL;
+
+    RT_ASSERT(serial != RT_NULL);
+
+    uart_dev = (struct rt_uart_ls1b *)serial->parent.user_data;
+    void *uart_base = uart_get_base(uart_dev->UARTx);
+
+    if (LSR_RXRDY & reg_read_8(uart_base + LS1B_UART_LSR_OFFSET))
+    {
+        return reg_read_8(uart_base + LS1B_UART_DAT_OFFSET);
+    }
+
+    return -1;
+}
+
+/* UART interrupt handler */
+static void uart_irq_handler(int vector, void *param)
+{
+    struct rt_serial_device *serial = (struct rt_serial_device *)param;
+    struct rt_uart_ls1b *uart_dev = RT_NULL;
+
+    RT_ASSERT(serial != RT_NULL);
+
+    uart_dev = (struct rt_uart_ls1b *)serial->parent.user_data;
+    void *uart_base = uart_get_base(uart_dev->UARTx);
+    unsigned char iir = reg_read_8(uart_base + LS1B_UART_IIR_OFFSET);
+
+    // 判断是否为接收超时或接收到有效数据
+    if ((IIR_RXTOUT & iir) || (IIR_RXRDY & iir))
+    {
+        rt_interrupt_enter();
+        rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
+        rt_interrupt_leave();
+    }
+
+}
+
+static const struct rt_uart_ops ls1b_uart_ops =
+{
+    ls1b_uart_configure,
+    ls1b_uart_control,
+    ls1b_uart_putc,
+    ls1b_uart_getc,
+};
+
+
+#if defined(RT_USING_UART1)
+struct rt_uart_ls1b uart1 =
+{
+    LS1B_UART1,
+    LS1B_UART1_IRQ,
+};
+struct rt_serial_device serial1;
+#endif /* RT_USING_UART1 */
+
+#if defined(RT_USING_UART2)
+struct rt_uart_ls1b uart2 =
+{
+    LS1B_UART2,
+    LS1B_UART2_IRQ,
+};
+struct rt_serial_device serial2;
+#endif /* RT_USING_UART2 */
+
+
+#if defined(RT_USING_UART3)
+struct rt_uart_ls1b uart3 =
+{
+    LS1B_UART3,
+    LS1B_UART3_IRQ,
+};
+struct rt_serial_device serial3;
+#endif /* RT_USING_UART3 */
+
+#if defined(RT_USING_UART4)
+struct rt_uart_ls1b uart4 =
+{
+    LS1B_UART4,
+    LS1B_UART4_IRQ,
+};
+struct rt_serial_device serial4;
+#endif /* RT_USING_UART4 */
+
+#if defined(RT_USING_UART5)
+struct rt_uart_ls1b uart5 =
+{
+    LS1B_UART5,
+    LS1B_UART5_IRQ,
+};
+struct rt_serial_device serial5;
+#endif /* RT_USING_UART5 */
+
+
+
+void rt_hw_uart_init(void)
+{
+    struct rt_uart_ls1b *uart;
+    struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
+
+#ifdef RT_USING_UART5
+		uart = &uart5;
+	
+		serial5.ops    = &ls1b_uart_ops;
+		serial5.config = config;
+	
+		rt_hw_interrupt_install(uart->IRQ, uart_irq_handler, &serial5, "UART5");
+	
+		/* register UART5 device */
+		rt_hw_serial_register(&serial5,
+							  "uart5",
+							  //RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_DMA_RX,
+							  RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
+							  uart);
+#endif /* RT_USING_UART5 */
+
+
+#ifdef RT_USING_UART2
+    uart = &uart2;
+
+    serial2.ops    = &ls1b_uart_ops;
+    serial2.config = config;
+
+    pin_set_purpose(36, PIN_PURPOSE_OTHER);
+    pin_set_purpose(37, PIN_PURPOSE_OTHER);
+    pin_set_remap(36, PIN_REMAP_SECOND);
+    pin_set_remap(37, PIN_REMAP_SECOND);
+
+    rt_hw_interrupt_install(uart->IRQ, uart_irq_handler, &serial2, "UART2");
+
+    /* register UART2 device */
+    rt_hw_serial_register(&serial2,
+                          "uart2",
+                          //RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_DMA_RX,
+                          RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
+                          uart);
+#endif /* RT_USING_UART2 */
+
+}
+