[RISC-V:K210]Add UART1~3 support for K210

This patch adds UART1~3 support for K210, and separates the rt_uart_ops of
UARTHS from UART.
This patch add configs in Kconfig for configuring the pins of UARTx,
please check the sysctl_set_power_mode for the pins in the io_config_init
of bsp/k210/driver/drv_io_config.c

Signed-off-by: Fu Wei <[email protected]>

Author: tekkamanninja

bsp/k210/driver/Kconfig

@@ -2,17 +2,44 @@ config BSP_USING_UART_HS
     bool "Enable High Speed UART"
     default y
 
-config BSP_USING_UART1
-    bool "Enable UART1 (GPIO0/1)"
+menu "General Purpose UARTs"
+
+menuconfig BSP_USING_UART1
+    bool "Enable UART1"
     default n
+    if BSP_USING_UART1
+        config BSP_UART1_TXD_PIN
+            int "uart1 TXD pin number"
+            default 20
+        config BSP_UART1_RXD_PIN
+            int "uart1 RXD pin number"
+            default 21
+    endif
 
-config BSP_USING_UART2
-    bool "Enable UART2 (GPIO0/1)"
+menuconfig BSP_USING_UART2
+    bool "Enable UART2"
     default n
+    if BSP_USING_UART2
+        config BSP_UART2_TXD_PIN
+            int "uart2 TXD pin number"
+            default 28
+        config BSP_UART2_RXD_PIN
+            int "uart2 RXD pin number"
+            default 27
+    endif
 
-config BSP_USING_UART3
-    bool "Enable UART3 (GPIO0/1)"
+menuconfig BSP_USING_UART3
+    bool "Enable UART3"
     default n
+    if BSP_USING_UART3
+        config BSP_UART3_TXD_PIN
+            int "uart3 TXD pin number"
+            default 22
+        config BSP_UART3_RXD_PIN
+            int "uart3 RXD pin number"
+            default 23
+    endif
+endmenu
 
 config BSP_USING_I2C1
     bool "Enable I2C1 (GPIO0/1)"

bsp/k210/driver/drv_io_config.c

@@ -63,6 +63,18 @@ static struct io_config
 #endif
 #endif
 
+#ifdef BSP_USING_UART1
+    IOCONFIG(BSP_UART1_TXD_PIN, FUNC_UART1_TX),
+    IOCONFIG(BSP_UART1_RXD_PIN, FUNC_UART1_RX),
+#endif
+#ifdef BSP_USING_UART2
+    IOCONFIG(BSP_UART2_TXD_PIN, FUNC_UART2_TX),
+    IOCONFIG(BSP_UART2_RXD_PIN, FUNC_UART2_RX),
+#endif
+#ifdef BSP_USING_UART3
+    IOCONFIG(BSP_UART3_TXD_PIN, FUNC_UART3_TX),
+    IOCONFIG(BSP_UART3_RXD_PIN, FUNC_UART3_RX),
+#endif
 };
 
 static int print_io_config()
@@ -89,7 +101,15 @@ int io_config_init(void)
     sysctl_set_power_mode(SYSCTL_POWER_BANK0, SYSCTL_POWER_V18);
     sysctl_set_power_mode(SYSCTL_POWER_BANK1, SYSCTL_POWER_V18);
     sysctl_set_power_mode(SYSCTL_POWER_BANK2, SYSCTL_POWER_V18);
-    
+#ifdef BSP_USING_UART2
+    // for IO-27/28
+    sysctl_set_power_mode(SYSCTL_POWER_BANK4, SYSCTL_POWER_V33);
+#endif
+#if  defined(BSP_USING_UART1) || defined(BSP_USING_UART3)
+    // for IO-20~23
+    sysctl_set_power_mode(SYSCTL_POWER_BANK3, SYSCTL_POWER_V33);
+#endif
+
     for(i = 0; i < count; i++)
     {
         fpioa_set_function(io_config[i].io_num, io_config[i].func);