On Thu, 2012-02-16 at 18:02 +0800, Shengzhou Liu wrote: > If USB UTMI PHY is not enable, writing to portsc register will lead to > kernel hang during boot up. > > Signed-off-by: Shengzhou Liu <Shengzhou.Liu@xxxxxxxxxxxxx> > --- > Apply for master branch of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git > Tested on P5020DS, the issue was reported by Benjamin Herrenschmidt. This fixes the hang, but sadly doesn't make USB work. I now get: ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver /soc@ffe000000/usb@210000: Invalid 'dr_mode' property, fallback to host mode fsl-ehci fsl-ehci.0: Freescale On-Chip EHCI Host Controller fsl-ehci fsl-ehci.0: new USB bus registered, assigned bus number 1 fsl-ehci fsl-ehci.0: irq 44, io mem 0xffe210000 fsl-ehci fsl-ehci.0: USB 2.0 started, EHCI 1.00 hub 1-0:1.0: USB hub found hub 1-0:1.0: 1 port detected fsl-ehci fsl-ehci.1: Freescale On-Chip EHCI Host Controller fsl-ehci fsl-ehci.1: new USB bus registered, assigned bus number 2 fsl-ehci fsl-ehci.1: irq 45, io mem 0xffe211000 fsl-ehci fsl-ehci.1: USB 2.0 started, EHCI 1.00 .../... usb 1-1: device descriptor read/64, error -110 usb 1-1: device descriptor read/64, error -110 <remove device, re-plug it> usb 1-1: new full-speed USB device number 3 using fsl-ehci hub 1-0:1.0: unable to enumerate USB device on port 1 <remove again, re-plug it> usb 1-1: new full-speed USB device number 4 using fsl-ehci usb 1-1: device descriptor read/64, error -110 The blurb about "invalid dr_mode property" makes me think there's some kind of disagreement between the device-tree coming with the machine and what upstream expects. Basically the DT doesn't contain a dr_mode property at all (which should be fine, host mode is what I want, but I suspect some stuff aren't being configured properly by u-boot either...) Cheers, Ben. -- 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
