In this serie I update the DWC2 host driver to use the device tree information and the associated PHY and CLOCK drivers when they are available.
I test this serie on stm32mp157c-ev1 board; The U-CLASS are provided by: - PHY by USBPHYC driver = ./drivers/phy/phy-stm32-usbphyc.c - CLOCK by RCC clock driver = drivers/clk/clk_stm32mp1.c - RESET by RCC reset driver = drivers/reset/stm32-reset.c
And I activate the configuration +CONFIG_USB_DWC2=y
PS: it is not the default configuration to avoid conflict with gadget driver
To solve a binding issue, I also deactivate the gadget support: by default only one driver is bound to theusbotg_hs node with "snps,dwc2" compatible, and today it is the device one (the first in the driver list).
I also need to deactivate hnp-srp support with:
&usbotg_hs { /* need to disable ONLY for HOST support */ hnp-srp-disable; };
WARNING: OTG with device or host support is not correctly handle by DWC2 driver (see example for dynamic OTG role in DWC3 driver).
The tests executed on the stm32mp157c-ev1 target:
STM32MP> usb start starting USB... Bus usb-otg@49000000: USB DWC2 Bus usbh-ehci@5800d000: USB EHCI 1.00 scanning bus usb-otg@49000000 for devices... 2 USB Device(s) found scanning bus usbh-ehci@5800d000 for devices... 3 USB Device(s) found scanning usb for storage devices... 2 Storage Device(s) found STM32MP> usb tree USB device tree: 1 Hub (480 Mb/s, 0mA) | U-Boot Root Hub | +-2 Mass Storage (480 Mb/s, 300mA) Verbatim STORE N GO 070731C8ACD7EE97
1 Hub (480 Mb/s, 0mA) | u-boot EHCI Host Controller | +-2 Hub (480 Mb/s, 2mA) | +-3 Mass Storage (480 Mb/s, 500mA) Generic USB Storage
STM32MP> ls usb 0 <DIR> 4096 . <DIR> 4096 .. <DIR> 16384 lost+found <DIR> 4096 record 1490212 xipImage 21058006 vmlinux
STM32MP> load usb 0 0xC0000000 vmlinux 21058006 bytes read in 10851 ms (1.9 MiB/s)
Patrick Delaunay (5): usb: host: dwc2: add phy support usb: host: dwc2: add support for clk usb: host: dwc2: force reset assert usb: host: dwc2: add usb33d supply support for stm32mp1 usb: host: dwc2: add trace to have clean usb start
drivers/usb/host/dwc2.c | 112 +++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 111 insertions(+), 1 deletion(-)