> > On 4/1/24 17:28, Aurelien Jarno wrote: > > On 2024-03-28 17:01, Heinrich Schuchardt wrote: > >> On 24.03.24 16:00, Aurelien Jarno wrote: > >>> On 2024-03-21 19:11, Heinrich Schuchardt wrote: > >>>> The differences between the Milk-V Mars board and the VisionFive 2 > >>>> board are small enough that we can support both using the same U-Boot > build. > >>>> > >>>> * The model and compatible property are taken from proposed Linux > patches. > >>>> * The EEPROM is atmel,24c02 according to the vendor U-Boot. > >>>> * The second Ethernet port is not available. > >>> > >>> From the device tree that have been submitted to the kernel [1] it > >>> seems another difference is that there is a CD gpio for mmc1. > >> > >> Thank you for reviewing. > >> > >> On all of Milk-V Mars, VisionFive 2 1.2B, and 1.3A I see GPIO 41 > >> level changing when removing or inserting an SD card using U-Boot > >> command 'gpio status -a'. So this seems not to be Milk-V specific. > >> > >> Could you, please, check. > > > > This already have been answered by others, thanks. > > > >>> From the schematics, it also seems that the usb0 port is not in > >>> peripheral mode, but in host mode. That said on the submitted kernel > >>> device tree it seems simply disabled. > >> > >> All three blue-colored USB 3.0 ports are able to read an SD-card in U-Boot. > >> > >> The black port provides 5V but I could not make it work. > >> > >> On the schema I found: > >> > >> USB20: Do not support OTG mode and AVSS_USB0-AVSS_USB2 attached to > ground. > >> > >> Could you, please, specify which node in the device-tree you want to > >> disable. I cannot see anything disabled for usb@10100000 and usb@0 in > >> the kernel device-tree. > > > > Disclaimer, I have no such board, but I remember people on IRC trying > > to use the device tree from the VF2 on a Milk-V Mars and getting an > > error with the USB being in a wrong mode. > > > > The difference I have noticed is not a node but the dr_mode property: > > > > &usb0 { > > dr_mode = "peripheral"; > > status = "okay"; > > }; > > Thanks Aurelien for the explanation. > > The node usb@10100000 (aka usb0) does not exist in the U-Boot > VisionFive2 device-tree, yet. There isn't any dr_mode property either. > > We will have to consider this node once we merge the Linux device-tree. > > Best regards > > Heinrich > usb@10100000 is cadence usb controller. In VF2, dr mode is usb peripheral and seldom used in u-boot. So the cadence usb wrapper codes not in uboot upstream. I don't know the dr mode in milkv 7110 board. But if it its dr mode is host, I think I need develop cadence usb wrapper code upstream.
Minda > > > > This does not appear on the patches submitted on the Linux side for > > the MilkV Mars. > > > > Aurelien > >