usb gadget on zaurus and kexec
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From: Cyril Hrubis on 19 May 2010 11:50 Hi! After some testing I found out that no usb gadget (g_ether, g_mass_storage, ...) is working after zaurus boots with kexec. So it seems like some missing initalization (it's working after doing reboot again) anybody has any clue, patch or ideas how to debug this? -- Cyril Hrubis -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Eric Miao on 20 May 2010 01:10 On Wed, May 19, 2010 at 11:46 PM, Cyril Hrubis <metan(a)ucw.cz> wrote: > Hi! > After some testing I found out that no usb gadget (g_ether, g_mass_storage, ...) > is working after zaurus boots with kexec. So it seems like some missing > initalization (it's working after doing reboot again) anybody has any clue, > patch or ideas how to debug this? > Dumping out the registers of the two situations and doing a comparison then might be a quick way. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Eric Miao on 10 Jun 2010 02:20 On Thu, May 20, 2010 at 1:05 PM, Eric Miao <eric.y.miao(a)gmail.com> wrote: > On Wed, May 19, 2010 at 11:46 PM, Cyril Hrubis <metan(a)ucw.cz> wrote: >> Hi! >> After some testing I found out that no usb gadget (g_ether, g_mass_storage, ...) >> is working after zaurus boots with kexec. So it seems like some missing >> initalization (it's working after doing reboot again) anybody has any clue, >> patch or ideas how to debug this? >> > > Dumping out the registers of the two situations and doing a comparison then > might be a quick way. > Any debugging update on this? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Marek Vasut on 10 Jun 2010 03:10 Dne Čt 10. června 2010 08:10:22 Eric Miao napsal(a): > On Thu, May 20, 2010 at 1:05 PM, Eric Miao <eric.y.miao(a)gmail.com> wrote: > > On Wed, May 19, 2010 at 11:46 PM, Cyril Hrubis <metan(a)ucw.cz> wrote: > >> Hi! > >> After some testing I found out that no usb gadget (g_ether, > >> g_mass_storage, ...) is working after zaurus boots with kexec. So it > >> seems like some missing initalization (it's working after doing reboot > >> again) anybody has any clue, patch or ideas how to debug this? > > > > Dumping out the registers of the two situations and doing a comparison > > then might be a quick way. > > Any debugging update on this? Yeah, there's a workaround. Cyril's working on a proper fix, but that might take some time. Simply -- UP2OCR is misconfigured. > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel(a)lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Robert Jarzmik on 10 Jun 2010 09:20
Marek Vasut <marek.vasut(a)gmail.com> writes: >> > Dumping out the registers of the two situations and doing a comparison >> > then might be a quick way. >> >> Any debugging update on this? > > Yeah, there's a workaround. Cyril's working on a proper fix, but that might take > some time. Simply -- UP2OCR is misconfigured. That's quite interesting. In the pxa27x_udc gadget driver, I seem to have a regression on the resume from suspend to RAM path. My USB UDC is not enumerated anymore. The might be a correlation, as UP2OCR is lost in the suspend process. I'm very interested by your analysis of the issue you have on kexec, as that might ease my work :) Besides, it's been some time I've been thinking that the pxa deserves a proper encapsulation of the USB internal routing paths (ie. a proper way to switch from usb host handled by ohci-pxa27x to an usb client handled by pxa2x_udc), to reflect the setup of the Pad Unit (see TRM chapter 12.4 : tables 12.2, 12.15, 12.17, 12.18 and 12.19). Whatever you find on the USB Port2 configuration register would help me design the Pad block. Cheers. -- Robert -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |