[bsp][qemu-vexpress-a9] Adapter driver for serial port v2 ([#10176](https://github.com/hydevcode/rt-thread/issues/10176))

hydevcode · hydevcode · commit 816a5495944e · 2025-04-18T14:12:24.000+08:00
diff --git a/bsp/qemu-vexpress-a9/.ci/attachconfig/ci.attachconfig.yml b/bsp/qemu-vexpress-a9/.ci/attachconfig/ci.attachconfig.yml
@@ -1,4 +1,10 @@
 # ------ PERIPHERAL CI ------
+peripheral.UARTv2:
+    kconfig:
+      - CONFIG_RT_USING_SERIAL_V2=y
+      - CONFIG_BSP_USING_UART1=y
+      - CONFIG_BSP_USING_UART2=y
+      - CONFIG_BSP_USING_UART3=y
 peripheral.EMAC:
     kconfig:
       - CONFIG_BSP_DRV_EMAC=y
diff --git a/bsp/qemu-vexpress-a9/drivers/Kconfig b/bsp/qemu-vexpress-a9/drivers/Kconfig
@@ -16,22 +16,74 @@ menuconfig BSP_USING_UART
     default y
     select RT_USING_SERIAL
     if BSP_USING_UART
-        config BSP_USING_UART0
-            bool "Enable UART0"
-            select RT_USING_UART0
+    menuconfig BSP_USING_UART0
+            bool "Enable UART0 (Debugger)"
             default y
-        config BSP_USING_UART1
+            if BSP_USING_UART0
+                config BSP_UART0_RX_BUFSIZE
+                    int "Set UART0 RX buffer size"
+                    range 64 65535
+                    depends on RT_USING_SERIAL_V2
+                    default 10240
+
+                config BSP_UART0_TX_BUFSIZE
+                    int "Set UART0 TX buffer size"
+                    range 0 65535
+                    depends on RT_USING_SERIAL_V2
+                    default 0
+            endif
+
+        menuconfig BSP_USING_UART1
             bool "Enable UART1"
-            select RT_USING_UART1
             default n
-        config BSP_USING_UART2
+            if BSP_USING_UART1
+                config BSP_UART1_RX_BUFSIZE
+                    int "Set UART1 RX buffer size"
+                    range 64 65535
+                    depends on RT_USING_SERIAL_V2
+                    default 10240
+
+                config BSP_UART1_TX_BUFSIZE
+                    int "Set UART1 TX buffer size"
+                    range 0 65535
+                    depends on RT_USING_SERIAL_V2
+                    default 0
+            endif
+
+        menuconfig BSP_USING_UART2
             bool "Enable UART2"
-            select RT_USING_UART2
             default n
-        config BSP_USING_UART3
+            if BSP_USING_UART2
+                config BSP_UART2_RX_BUFSIZE
+                    int "Set UART2 RX buffer size"
+                    range 64 65535
+                    depends on RT_USING_SERIAL_V2
+                    default 10240
+
+                config BSP_UART2_TX_BUFSIZE
+                    int "Set UART2 TX buffer size"
+                    range 0 65535
+                    depends on RT_USING_SERIAL_V2
+                    default 0
+            endif
+
+        menuconfig BSP_USING_UART3
             bool "Enable UART3"
-            select RT_USING_UART3
             default n
+            if BSP_USING_UART3
+                config BSP_UART3_RX_BUFSIZE
+                    int "Set UART3 RX buffer size"
+                    range 64 65535
+                    depends on RT_USING_SERIAL_V2
+                    default 10240
+
+                config BSP_UART3_TX_BUFSIZE
+                    int "Set UART3 TX buffer size"
+                    range 0 65535
+                    depends on RT_USING_SERIAL_V2
+                    default 0
+            endif
+
     endif
 
 config BSP_USING_LVGL
diff --git a/bsp/qemu-vexpress-a9/drivers/drv_uart_v2.c b/bsp/qemu-vexpress-a9/drivers/drv_uart_v2.c
@@ -36,14 +36,34 @@ struct hw_uart_device
 #define UART_CR(base)   __REG32(base + 0x30)
 #define UART_IMSC(base) __REG32(base + 0x38)
 #define UART_ICR(base)  __REG32(base + 0x44)
+#define UART_LCR_H(base)  __REG32(base + 0x2C)
+#define UART_DMACR(base)      __REG32(base + 0x48)
+#define UART_IFLS(base) __REG32(base + 0x34)
+
+/* test */
+#define UART_TCR(base) __REG32(base + 0x80)
+#define UART_ITOP(base) __REG32(base + 0x88)
+
+#define UARTITOP_RXINTR 0x400
+
+/* fifo */
+#define UARTLCR_H_FEN     0x10
 
 #define UARTFR_RXFE     0x10
 #define UARTFR_TXFF     0x20
-#define UARTIMSC_RXIM   0x10
-#define UARTIMSC_TXIM   0x20
+#define UARTFR_RXFF     0x40
+#define UARTFR_TXFE     0x80
+#define UARTFR_BUSY     0x08
+
+
 #define UARTICR_RXIC    0x10
 #define UARTICR_TXIC    0x20
 
+
+#define UARTIMSC_RXIM   0x10
+#define UARTIMSC_RTIM   0x40
+#define UARTIMSC_TXIM   0x20
+
 #if defined(BSP_USING_UART0)
 struct rt_serial_device serial0;
 #endif
@@ -105,17 +125,29 @@ static struct hw_uart_device _uart_device[] = {
  *
  * @param serial Serial device
  */
+
 static void rt_hw_uart_isr(int irqno, void *param)
 {
     struct rt_serial_device *serial = (struct rt_serial_device *)param;
-    struct hw_uart_device *uart;
     RT_ASSERT(serial != RT_NULL);
+    struct hw_uart_device *uart;
     uart = (struct hw_uart_device *)serial->parent.user_data;
-    struct rt_serial_rx_fifo *rx_fifo;
-    rx_fifo = (struct rt_serial_rx_fifo *) serial->serial_rx;
-    RT_ASSERT(rx_fifo != RT_NULL);
-    rt_ringbuffer_putchar(&(rx_fifo->rb), UART_DR(uart->hw_base));
-    rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
+    RT_ASSERT(uart != RT_NULL);
+
+    if(!(UART_FR(uart->hw_base) & UARTFR_RXFE) && (UART_IMSC(uart->hw_base) & UARTIMSC_RXIM))
+    {
+        struct rt_serial_rx_fifo *rx_fifo;
+        rx_fifo = (struct rt_serial_rx_fifo *) serial->serial_rx;
+        RT_ASSERT(rx_fifo != RT_NULL);
+        char rec_ch=UART_DR(uart->hw_base)& 0xff;
+        rt_ringbuffer_putchar(&(rx_fifo->rb), rec_ch);
+        rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
+    }
+    else if((UART_IMSC(uart->hw_base) & UARTIMSC_TXIM))
+    {
+        UART_ICR(uart->hw_base)|= UARTICR_TXIC;
+        rt_hw_serial_isr(serial, RT_SERIAL_EVENT_TX_DONE);
+    }
 }
 
 static rt_err_t uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
@@ -194,7 +226,6 @@ static int uart_putc(struct rt_serial_device *serial, char ch)
     RT_ASSERT(serial != RT_NULL);
 
     uart = (struct hw_uart_device *)serial->parent.user_data;
-
     while (UART_FR(uart->hw_base) & UARTFR_TXFF);
     UART_DR(uart->hw_base) = ch;
 
@@ -207,6 +238,7 @@ static int uart_getc(struct rt_serial_device *serial)
     struct hw_uart_device *uart;
 
     RT_ASSERT(serial != RT_NULL);
+
     uart = (struct hw_uart_device *)serial->parent.user_data;
 
     ch = -1;
@@ -218,18 +250,37 @@ static int uart_getc(struct rt_serial_device *serial)
     return ch;
 }
 static rt_ssize_t uart_transmit(struct rt_serial_device *serial,
-                                    rt_uint8_t *buf,
-                                    rt_size_t size,
-                                    rt_uint32_t tx_flag)
+    rt_uint8_t *buf,
+    rt_size_t size,
+    rt_uint32_t tx_flag)
 {
     RT_ASSERT(serial != RT_NULL);
     RT_ASSERT(buf != RT_NULL);
-
     RT_ASSERT(size);
+    uint32_t fifo_size = 0, tx_size = 0;
+    struct hw_uart_device *uart = (struct hw_uart_device *)serial->parent.user_data;
+    struct rt_serial_tx_fifo *tx_fifo;
+    tx_fifo = (struct rt_serial_tx_fifo *) serial->serial_tx;
+    uint8_t ch = 0;
+    RT_ASSERT(tx_fifo != RT_NULL);
+
+    if (size > 0)
+    {
+        if (UART_IMSC(uart->hw_base) & UARTIMSC_TXIM)
+        {
+            UART_IMSC(uart->hw_base) &= ~UARTIMSC_TXIM;
+            if(rt_ringbuffer_getchar(&tx_fifo->rb, &ch))
+            {
+                while (UART_FR(uart->hw_base) & UARTFR_TXFF);
+                UART_DR(uart->hw_base) = ch;
+            }
+            UART_IMSC(uart->hw_base) |= UARTIMSC_TXIM;
+        }
+    }
 
-    uart_control(serial, RT_DEVICE_CTRL_SET_INT, (void *)tx_flag);
     return size;
 }
+
 static const struct rt_uart_ops _uart_ops = {
     .configure = uart_configure,
     .control = uart_control,
@@ -238,12 +289,43 @@ static const struct rt_uart_ops _uart_ops = {
     .transmit = uart_transmit
 };
 
+static int uart_config(void)
+{
+    struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
+
+#ifdef BSP_USING_UART0
+_uart_device[0].serial->config = config;
+_uart_device[0].serial->config.rx_bufsz = BSP_UART0_RX_BUFSIZE;
+_uart_device[0].serial->config.tx_bufsz = BSP_UART0_TX_BUFSIZE;
+#endif /* BSP_USING_UART0 */
+
+#ifdef BSP_USING_UART1
+_uart_device[1].serial->config = config;
+_uart_device[1].serial->config.rx_bufsz = BSP_UART1_RX_BUFSIZE;
+_uart_device[1].serial->config.tx_bufsz = BSP_UART1_TX_BUFSIZE;
+#endif /* BSP_USING_UART1 */
+
+#ifdef BSP_USING_UART2
+_uart_device[2].serial->config = config;
+_uart_device[2].serial->config.rx_bufsz = BSP_UART2_RX_BUFSIZE;
+_uart_device[2].serial->config.tx_bufsz = BSP_UART2_TX_BUFSIZE;
+#endif /* BSP_USING_UART2 */
+
+#ifdef BSP_USING_UART3
+_uart_device[3].serial->config = config;
+_uart_device[3].serial->config.rx_bufsz = BSP_UART3_RX_BUFSIZE;
+_uart_device[3].serial->config.tx_bufsz = BSP_UART3_TX_BUFSIZE;
+#endif /* BSP_USING_UART3 */
+
+    return RT_EOK;
+}
+
 int rt_hw_uart_init(void)
 {
 
     rt_err_t err = RT_EOK;
 
-    struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
+    uart_config();
 
     for (uint32_t i = 0; i < sizeof(_uart_device) / sizeof(_uart_device[0]); i++)
     {
@@ -253,9 +335,6 @@ int rt_hw_uart_init(void)
         #endif
 
         _uart_device[i].serial->ops = &_uart_ops;
-        _uart_device[i].serial->config = config;
-        _uart_device[i].serial->config.rx_bufsz = 64;
-        _uart_device[i].serial->config.tx_bufsz = 0;
         /* register UART device */
         err = rt_hw_serial_register(_uart_device[i].serial,
                             _uart_device[i].device_name,
@@ -264,6 +343,11 @@ int rt_hw_uart_init(void)
         rt_hw_interrupt_install(_uart_device[i].irqno, rt_hw_uart_isr, _uart_device[i].serial, _uart_device[i].device_name);
         /* enable Rx and Tx of UART */
         UART_CR(_uart_device[i].hw_base) = (1 << 0) | (1 << 8) | (1 << 9);
+
+        /* Fifo */
+        UART_LCR_H(_uart_device[i].hw_base) =(1 << 4);
+        /* UART_IFLS(_uart_device[i].hw_base) = (0 <<3 ) | (0 <<4 )| (1 <<5 ); */
+        /* UART_DMACR(_uart_device[i].hw_base) = (1<<0); */
     }
 
     return err;
