Joey Oravec wrote:
"Leonid" Leonid@a-k-a.net wrote in message news:406A31B117F2734987636D6CCC93EE3C01CAD749@ehost011-3.exch011.intermedia.net...
I'm trying to implement simple USB device in u-boot for at91rm9200 and as a first step I want to see that I can work with interrupts there. I added temporary device initialization code to usb_lowlevel_init():
I used the USB Device port as a console for my at91sam9261, acting as a usbser.sys compatible usb-to-serial port. It was a lot easier to use a polling interface because there was some Atmel sample code available.
During early startup, I add the usb driver with device_register(). Each function polls the status register, which works out fine since uboot calls tstc constantly to look for a new character or putc to display something. Finally I added a check for the device sense (power) to skip the initialization completely if we know it's not connected to anything.
-joey
Hi Joey,
If possible, I would also be interested in obtaining your U-Boot USB device code.
I tried creating a usbdcore_at91.c file to fit into the existing U-Boot usbdcore driver for the TI OMAP1510 a few months ago and didn't get very far, mainly due to the way the AT91 UDP supports various transactions in hardware.
Thanks, ../fam