Lichee Nano linux5.2 开发支持USB设备与主机模式

一. usb host/device模式

     1.1. host模式

            USB Host 的意思是该设备可以作为USB主机连接USB外围设备，如连接U盘，键盘，鼠标

      1.2. usb device模式

          USB Device，意思该设备可以以U盘身份连接到USB主机

      1.3. OTG模式

          一般的PC机的USB接口都是USB Host Only的模式，手机则不一定，对于手机来说，同时支持Host和Device模式的，称之为OTG

     1.2. usb从机模式 

二 . USB 主机模式 pack

     2.1. usb驱动补丁

diff --git a/arch/arm/boot/dts/suniv-f1c100s-licheepi-nano.dts b/arch/arm/boot/dts/suniv-f1c100s-licheepi-nano.dts
index ca644541a..890a57717 100644
--- a/arch/arm/boot/dts/suniv-f1c100s-licheepi-nano.dts
+++ b/arch/arm/boot/dts/suniv-f1c100s-licheepi-nano.dts
@@ -20,7 +20,7 @@
     };
 
     panel: panel {
-        compatible = "lg,lb070wv8", "simple-panel";
+        compatible = "qiaodian,qd43003c0-40", "simple-panel";
         #address-cells = <1>;
         #size-cells = <0>;
         enable-gpios = <&pio 4 6 GPIO_ACTIVE_HIGH>;
@@ -79,3 +79,17 @@
     pinctrl-0 = <&uart0_pe_pins>;
     status = "okay";
 };
+
+&otg_sram {
+    status = "okay";
+};
+
+&usb_otg {
+    dr_mode = "otg";
+    status = "okay";
+};
+
+&usbphy {
+    usb0_id_det-gpio = <&pio 4 2 GPIO_ACTIVE_HIGH>; /* PE2 */
+    status = "okay";
+};
diff --git a/arch/arm/boot/dts/suniv-f1c100s.dtsi b/arch/arm/boot/dts/suniv-f1c100s.dtsi
index 26d8e5577..437bdf7d9 100644
--- a/arch/arm/boot/dts/suniv-f1c100s.dtsi
+++ b/arch/arm/boot/dts/suniv-f1c100s.dtsi
@@ -221,6 +221,31 @@
             resets = <&ccu RST_BUS_UART2>;
             status = "disabled";
         };
+        usb_otg: usb@1c13000 {
+            compatible = "allwinner,suniv-musb";
+            reg = <0x01c13000 0x0400>;
+            clocks = <&ccu CLK_BUS_OTG>;
+            resets = <&ccu RST_BUS_OTG>;
+            interrupts = <26>;
+            interrupt-names = "mc";
+            phys = <&usbphy 0>;
+            phy-names = "usb";
+            extcon = <&usbphy 0>;
+            allwinner,sram = <&otg_sram 1>;
+            status = "disabled";
+        };
+
+        usbphy: phy@1c13400 {
+            compatible = "allwinner,suniv-usb-phy";
+            reg = <0x01c13400 0x10>;
+            reg-names = "phy_ctrl";
+            clocks = <&ccu CLK_USB_PHY0>;
+            clock-names = "usb0_phy";
+            resets = <&ccu RST_USB_PHY0>;
+            reset-names = "usb0_reset";
+            #phy-cells = <1>;
+            status = "disabled";
+        };
         fe0: display-frontend@1e00000 {
             compatible = "allwinner,suniv-f1c100s-display-frontend";
             reg = <0x01e00000 0x20000>;
diff --git a/drivers/phy/allwinner/phy-sun4i-usb.c b/drivers/phy/allwinner/phy-sun4i-usb.c
index 856927382..3cd9e946a 100644
--- a/drivers/phy/allwinner/phy-sun4i-usb.c
+++ b/drivers/phy/allwinner/phy-sun4i-usb.c
@@ -98,6 +98,7 @@
 #define POLL_TIME            msecs_to_jiffies(250)
 
 enum sun4i_usb_phy_type {
+    suniv_phy,
     sun4i_a10_phy,
     sun6i_a31_phy,
     sun8i_a33_phy,
@@ -859,6 +860,14 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev)
     return 0;
 }
 
+static const struct sun4i_usb_phy_cfg suniv_cfg = {
+    .num_phys = 1,
+    .type = suniv_phy,
+    .disc_thresh = 3,
+    .phyctl_offset = REG_PHYCTL_A10,
+    .dedicated_clocks = true,
+};
+
 static const struct sun4i_usb_phy_cfg sun4i_a10_cfg = {
     .num_phys = 3,
     .type = sun4i_a10_phy,
@@ -973,6 +982,7 @@ static const struct sun4i_usb_phy_cfg sun50i_h6_cfg = {
 };
 
 static const struct of_device_id sun4i_usb_phy_of_match[] = {
+    { .compatible = "allwinner,suniv-usb-phy", .data = &suniv_cfg },
     { .compatible = "allwinner,sun4i-a10-usb-phy", .data = &sun4i_a10_cfg },
     { .compatible = "allwinner,sun5i-a13-usb-phy", .data = &sun5i_a13_cfg },
     { .compatible = "allwinner,sun6i-a31-usb-phy", .data = &sun6i_a31_cfg },
diff --git a/drivers/usb/musb/sunxi.c b/drivers/usb/musb/sunxi.c
index 832a41f9e..83f3fa5b0 100644
--- a/drivers/usb/musb/sunxi.c
+++ b/drivers/usb/musb/sunxi.c
@@ -714,14 +714,17 @@ static int sunxi_musb_probe(struct platform_device *pdev)
     INIT_WORK(&glue->work, sunxi_musb_work);
     glue->host_nb.notifier_call = sunxi_musb_host_notifier;
 
-    if (of_device_is_compatible(np, "allwinner,sun4i-a10-musb"))
+    if (of_device_is_compatible(np, "allwinner,sun4i-a10-musb") ||
+        of_device_is_compatible(np, "allwinner,suniv-musb")) {
         set_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags);
+    }
 
     if (of_device_is_compatible(np, "allwinner,sun6i-a31-musb"))
         set_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags);
 
     if (of_device_is_compatible(np, "allwinner,sun8i-a33-musb") ||
-        of_device_is_compatible(np, "allwinner,sun8i-h3-musb")) {
+        of_device_is_compatible(np, "allwinner,sun8i-h3-musb") ||
+        of_device_is_compatible(np, "allwinner,suniv-musb")) {
         set_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags);
         set_bit(SUNXI_MUSB_FL_NO_CONFIGDATA, &glue->flags);
     }
@@ -812,6 +815,7 @@ static int sunxi_musb_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id sunxi_musb_match[] = {
+    { .compatible = "allwinner,suniv-musb", },
     { .compatible = "allwinner,sun4i-a10-musb", },
     { .compatible = "allwinner,sun6i-a31-musb", },
     { .compatible = "allwinner,sun8i-a33-musb", },

    2.2. 打补丁

         a. 把上述补丁保持到文件usb-otg.patch

         b. 打补丁：

patch -p1 < usb.patch

三. 实战

    3.1. otg与PC共享网络

 

 

 

 

 

 

 

 

参考文献：https://blog.csdn.net/u012577474/article/details/102895602