Hi,
On Fri, May 22, 2015 at 11:04:33AM +0300, Ben Dooks wrote:
> I am trying to get the full-speed USB host working on an custom AM3517
> device with the 3.18.12 kernel. The hardware works (a 2.6.37 kernel has
> been used for testing).
>
> Does anyone have any experience of 3.18 (or similarly recent kernel on
> an AM3517 system) or have any pointers as where to start debugging? The
> ti-linux-3.14.y does not have any patches that aren't applied to the
> usb on 3.18.13.
>
> The cpu port 1 is connected by a TI TUSB1106 usb transceiver that is
> directly connected to a full-speed hub (TI USB2046) hub so the OHCI
> driver is the only one in use.
>
> Note, the ohci-omap3 is loaded as a module as this is how their user
> application expects to be able to shut down usb when it does not need
> it.
>
> The device tree configuration for the usb host:
and what exactly doesn't work ? That old OHCI driver hasn't been touched
in years, it's no surprise that it stopped working :-(
Anyway, what exactly doesn't work ? No device enumerates ? Do you get
any IRQs by plugging a new device in ?
> > &usbhshost {
> > status = "okay"; /* just in case it is started disabled */
> >
> > port1-mode = "ohci-phy-6pin-dpdm";
> > };
> >
> > &usbhsohci {
> > status = "okay";
> > };
> >
> > &usbhsehci {
> > status = "disabled"; /* no ehci on board */
> > };
>
>
> The usb from the logs is as follows. Some extra debugging has been
> added to verify the device-tree settings:
>
> > [ 0.000000] AM3517 ES1.1 (l2cache sgx neon)
> >
> > [ 0.869706] usbcore: registered new interface driver usbfs
> > [ 0.874270] usbcore: registered new interface driver hub
> > [ 0.878592] usbcore: registered new device driver usb
> > [ 1.223199] usbhs_tll 48062000.usbhstll: starting TI HSUSB TLL Controller
> > [ 1.273000] usbhs_omap 48064000.usbhshost: ports 0
> > [ 1.278291] usbhs_omap 48064000.usbhshost: port 0: ohci-phy-6pin-dpdm
> > [ 1.284476] usbhs_omap 48064000.usbhshost: port0-mode: ohci-phy-6pin-dpdm ->5
> > [ 1.288689] usbhs_tll 48062000.usbhstll: omap_tll_init()
> > [ 1.293628] usbhs_omap 48064000.usbhshost: usbhs_runtime_resume
> > [ 1.298434] usbhs_omap 48064000.usbhshost: sysconfig 0x00001009
> > [ 1.302730] usbhs_tll 48062000.usbhstll: omap_tll_enable()
> > [ 1.307668] usbhs_omap 48064000.usbhshost: usbhs_runtime_suspend
> > [ 1.310142] stopping usb controller
> > [ 1.419910] usbhs_tll 48062000.usbhstll: omap_tll_disable()
> > [ 1.423547] usbhs_omap 48064000.usbhshost: 3 ports
> > [ 1.429065] usbhs_omap 48064000.usbhshost: starting TI HSUSB Controller
> > [ 1.433831] usbhs_omap 48064000.usbhshost: usbhs_runtime_resume
> > [ 1.438625] usbhs_omap 48064000.usbhshost: sysconfig 0x00001009
> > [ 1.442921] usbhs_tll 48062000.usbhstll: omap_tll_enable()
> > [ 1.448548] usbhs_omap 48064000.usbhshost: omap_usbhs_rev1_hostconfig =>
> > [ 1.455034] usbhs_omap 48064000.usbhshost: UHH setup done, uhh_hostconfig=80d
> > [ 1.459918] usbhs_omap 48064000.usbhshost: usbhs_runtime_suspend
> > [ 1.462337] stopping usb controller
> > [ 1.569905] usbhs_tll 48062000.usbhstll: omap_tll_disable()
> > [ 1.575408] usbhs_omap 48064000.usbhshost: populating usb sub nodes....
> >
> > [ 77.609168] usbhs_omap 48064000.usbhshost: usbhs_runtime_resume
> > [ 77.613927] usbhs_omap 48064000.usbhshost: sysconfig 0x00001009
> > [ 77.618374] usbhs_tll 48062000.usbhstll: omap_tll_enable()
> > [ 77.802694] usb usb1: New USB device found, idVendor=1d6b, idProduct=0001
> > [ 77.816003] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber1
> > [ 77.827391] usb usb1: Product: OHCI Host Controller
> > [ 77.838674] usb usb1: Manufacturer: Linux 3.18.13-00203-ga3c52be-dirty ohci_d
> > [ 77.849913] usb usb1: SerialNumber: 48064400.ohci
OK, so this is roothub, what happens when a device is plugged to the
other end ? Is VBUS charged ? We didn't even enumerate TUSB2046, did you
look at its datasheet (http://www.ti.com/lit/ds/symlink/tusb2046b.pdf) ?
What is the state of RESETn pin ? Perhaps that's tied to a GPIO and the
old TI kernel toggles that ? Anything interesting from usbmon ?
cheers
--
balbi
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