【TINY4412】LINUX移植笔记：（10）USB OTG

宿主机 ： 虚拟机 Ubuntu 16.04 LTS / X64
目标板[底板]： Tiny4412SDK - 1506
目标板[核心板]： Tiny4412 - 1412
LINUX内核： 4.12.0
交叉编译器： gcc-arm-none-eabi-5_4-2016q3
日期： 2017-7-27 22:04:55
作者： SY

简介

前面已经移植好了USB接口，USB-OTG就很简单了。

设备树

# exynos4.dtsi hsotg: hsotg@12480000 { compatible = "samsung,s3c6400-hsotg"; reg = <0x12480000 0x20000>; interrupts = 71 IRQ_TYPE_LEVEL_HIGH>; clocks = <&clock CLK_USB_DEVICE>; clock-names = "otg"; phys = <&exynos_usbphy 0>; phy-names = "usb2-phy"; status = "disabled"; }; # exynos4412-tiny4412.dts &hsotg { status = "okay"; };

menuconfig

Device Drivers ---> [*] USB support ---> [*] OTG support

分析

找到./driver/usb/dwc2/platform.c module_platform_driver(dwc2_platform_driver); static struct platform_driver dwc2_platform_driver = { .driver = { .name = dwc2_driver_name, .of_match_table = dwc2_of_match_table, .pm = &dwc2_dev_pm_ops, }, .probe = dwc2_driver_probe, --> .remove = dwc2_driver_remove, .shutdown = dwc2_driver_shutdown, }; static int dwc2_driver_probe(struct platform_device *dev) { }

测试

0.881087] dwc2 12480000.hsotg: 12480000.hsotg supply vusb_d not found, using dummy regulator [ 0.889656] dwc2 12480000.hsotg: 12480000.hsotg supply vusb_a not found, using dummy regulator [ 1.302603] dwc2 12480000.hsotg: dwc2_check_params: Invalid parameter g_np_tx_fifo_size=1024 [ 1.302709] dwc2 12480000.hsotg: EPs: 16, dedicated fifos, 7808 entries in SPRAM [ 1.422647] dwc2 12480000.hsotg: DWC OTG Controller [ 1.422712] dwc2 12480000.hsotg: new USB bus registered, assigned bus number 1 [ 1.422796] dwc2 12480000.hsotg: irq 45, io mem 0x12480000 [ 1.422980] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002