[U-Boot] USB host on the AT91sam9g45

[Marcel]

Hi,

Sorry to top post, but I think it is fine in this case (no replies on my own 
message yet).

I have got USB host working on the AT91sam9g45.
The board I'm using is from in-circuit ( http://www.ic-
board.de/product_info.php?info=p125_STK-ADB1000-SAM9G45-OEM-5inchTFT.html ).
In specific I'm using their ICnova SAM9G45 OEM board and also tested using the 
ADB1000 main board. 

It works with all brands of mass storage devices I have in house, so that's 
great. It does however seem to operate only at full speed (not in Linux 
though) and although that's not a very big issue, I wonder if there's a reason 
for it (I don't see EHCI being configured anywhere yet). This is what the 
device tree looks like :

Device Tree:
  1  Hub (12 Mb/s, 0mA)        
  |   OHCI Root Hub 
  |
  +-2  Mass Storage (12 Mb/s, 100mA)
       CBM      Flash Disk       25112500B9281506

Since the Hub shows OHCI, I wonder if I need to enable something to allow EHCI 
or whether it's a HUB implementation issue. 
I tried CONFIG_USB_EHCI, but no change.

Any comment on this ? 
Can it work in high speed mode or has this not been tested yet ?

Unfortunately I changed a few things along the way and tried many times to 
just "make" without success. Finally after a "make clean" and "make" things 
worked fine. So, I'll need to clean up things before I can commit a patch and 
know why initially it didn't work. That shouldn't be too difficult though from a 
working state.

My goal is to get USB device working too (actually my main goal) and commit 
the whole thing after I have that working as well. The main issue is however 
that I have just a couple of days left to get it done this month (otherwise I 
will continue next month). 
I do have all USB device functions implemented but somehow have no response 
(hooked up a USB analyser and see absolutely zero). 
I enabled CDC and it seems to run through all functions just fine. It does look 
like I'm close to getting it to work, but my guess is I miss some very basic 
setting of the G45. If someone has an idea, please let me know as I think I 
may be looking for the solution for a while otherwise (not an issue but a fact 
I guess ;-) ). 

Best regards,
Marcel

> Hi,
> 
> I wonder if anyone has used USB host on the AT91sam9g45.
> 
> In current u-boot-usb, USB host can be configured, but I can't make it
> work. I used the configuration from the AT91sam9m10g45 regarding the USB
> host part.
> 
> It does the following (usb storage device is attached)
> 
> Sam9> usb start
> (Re)start USB...
> USB:   scanning bus for devices... 1 USB Device(s) found
>        scanning bus for storage devices... 0 Storage Device(s) found
> Sam9> usb info
> 1: Hub,  USB Revision 1.10
>  -  OHCI Root Hub
>  - Class: Hub
>  - PacketSize: 8  Configurations: 1
>  - Vendor: 0x0000  Product 0x0000 Version 0.0
>    Configuration: 1
>    - Interfaces: 1 Self Powered 0mA
>      Interface: 0
>      - Alternate Setting 0, Endpoints: 1
>      - Class Hub
>      - Endpoint 1 In Interrupt MaxPacket 2 Interval 255ms
> 
> Below are the related config items :
> 
> #define CONFIG_ARM926EJS	1	/* This is an ARM926EJS Core */
> #define CONFIG_ICNOVA_ARM9	1	/* It's an  ICnova SAM9G45 OEM boardR */
> #define CONFIG_AT91SAM9G45	1	/* It's an Atmel AT91SAM9G45 SoC */
> #define CONFIG_AT91_LEGACY      1       /* needed for some defines */
> #define CONFIG_ARCH_CPU_INIT
> #undef CONFIG_USE_IRQ			/* we don't need IRQ/FIQ stuff	*/
> 
> /* USB */
> #define CONFIG_USB_ATMEL		1
> #define CONFIG_USB_OHCI_NEW		1
> #define CONFIG_SYS_USB_OHCI_CPU_INIT 1
> #define CONFIG_SYS_USB_OHCI_REGS_BASE	0x00700000
> #define CONFIG_SYS_USB_OHCI_SLOT_NAME	"at91sam9g45"
> #define CONFIG_SYS_USB_OHCI_MAX_ROOT_PORTS	2
> #define CONFIG_DOS_PARTITION		1
> #define CONFIG_USB_STORAGE		1
> 
> Any ideas what I can check ?
> 
> Best regards,
> Marcel
> 
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