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
