On Fri, Dec 14, 2012 at 11:53 AM, Ian Coolidge <iancoolidge@xxxxxxxxx> wrote: > we find that with about a 2% chance, the gadget comes up in some kind of firmware failed state, driving VBUS. > In this condition, we found that MUSB_DEVCTL_SESSION bit was set. > I understand this to be indicative of MUSB thinking it is in host mode, which agrees with the driven VBUS. > Further, in this state, I found that usually, there was one interrupt from twl4030_usb, but NO interrupts from musb-hdrc. I'm also also often seeing this and don't know any workaround except powercycling the board :( This was kind or relieved for me after I changed it to deinit musb on shutdown/reset (3.3 should have that patch merged), however if you randomly reset the board, there is still something like 30-50% chance musb will come up dead, and on proper reset it's still something like 5% chance like you reported. -- Gražvydas -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
