Hi Russ, On 05/03/12 22:08, Russ Dill wrote: > On Wed, May 2, 2012 at 3:38 AM, Raja, Govindraj <govindraj.raja@xxxxxx> wrote: >> On Wed, May 2, 2012 at 2:17 PM, Russ Dill <Russ.Dill@xxxxxx> wrote: >>> On Mon, Mar 19, 2012 at 6:34 AM, Raja, Govindraj <govindraj.raja@xxxxxx> wrote: >>>> On Mon, Mar 19, 2012 at 12:12 PM, Keshava Munegowda >>>> <keshava_mgowda@xxxxxx> wrote: >>>>> From: Keshava Munegowda <Keshava_mgowda@xxxxxx> >>>>> >>>>> It is observed that the echi ports of 3430 sdp board >>>>> are not working due to the random timing of programming >>>>> the associated GPIOs of the ULPI PHYs of the EHCI for reset. >>>>> If the PHYs are reset at during usbhs core driver, host ports will >>>>> not work because EHCI driver is loaded after the resetting PHYs. >>>>> The PHYs should be in reset state while initializing the EHCI >>>>> controller. >>>>> The code which does the GPIO pins associated with the PHYs >>>>> are programmed to reset is moved from the USB host core driver >>>>> to EHCI driver. >>>> >>>> I tested on beagle xm where gpio nreset is requested from >>>> board file. >>>> (Basic enumertaion after gpio nreset seems to work fine, >>>> Hub and smsc lan chip get detected afetr boot up) >>>> >>> >>> What base did you test this on top of? my xM is failing USB-wise when >>> I apply this on v3.3.3 (with the UART mux fix patch) and where it is >>> applied within master (3.4-rc4, again, with the UART mux fix patch). >>> Additionally, reverting this patch from 3.4-rc5 causes rc5 to work >>> properly. >>> >> >> Works for me be on 3.4-rc5 Beagle-XM even without reverting the patch >> >> Logs as in here [1]. >> >> -- >> Thanks, >> Govindraj.R >> >> [1]: >> http://pastebin.pandaboard.org/index.php/view/20343533 > > I've tracked down the difference. I'm loading my uEnv.txt and uImage > in u-boot from the network which means initializing USB. You are > loading straight from MMC. If I switch to loading straight from MMC > everything works. > > Can everyone do a 'usb start' in u-boot before booting and re-test? > I'm pretty sure this is a regression, but the bug could be a strange > u-boot/kernel interaction. Probably, kernel code does not reinitialize EHCI correctly if it was already enabled? Can you try the below sequence: usb start usb stop boot Linux ? -- Regards, Igor. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
