Max Herman

imx283 and USB0_ID mapping

Discussion created by Max Herman on Apr 30, 2012
Latest reply on May 15, 2012 by Max Herman



I'm working with the custom board, that has imx283, and USB0 circuit same as iMX28 EVK, except that USB0_ID signal is router to a different pin of the micro-controller. On the EVK (288) it goes to PINID_AUART1_RTS, but there are no such pin on the 283 series. So it is router to the PINID_PWM2.



I changed pin mapping in the mx28evk_pins.c to this: 



#if defined(CONFIG_USB_OTG)
.name = "usb0_id",
.fun = PIN_FUN3,
.data = 1,
.pull = 1,
.pullup = 1,




Then I rebuild the kernel, and tried to make USB0-OTG work as a device, using g_serial module, with no luck. It simply didn't worked, not a sign of any USB activity on Host (my PC) or Device (imx283) side. I also tried PINID_PWM2/PIN_FUN2 with same results.

USB-OTG in a device mode works just fine, on imx28-EVK, when I use same kernel with USB0_ID pin mapped to PINID_AUART1_RTS.



Does anybody know if there are other places/definitions that needs to be changed, when moving USB0_ID functionality to a different pin?

I've spent couple days reviewing USB source code, trying to find a hard-coded reference to this pin, IRQ/DMA setup that could be affected by moving the pin, and haven't found anything.