[ehci-orion] ETIMEOUT with ehci_setup()'s ehci_halt()
sebastian.hesselbarth at gmail.com
Sat Jun 6 05:17:44 PDT 2015
On 05.06.2015 17:19, Andrew Lunn wrote:
> On Fri, Jun 05, 2015 at 04:34:54PM +0200, Valentin Longchamp wrote:
>> I am currently bringing up the USB 2.0 Host controller of the Bobcat's (98DX4122
>> Marvell switch) internal kirkwood CPU on a variation of Keymile's km_kirwood
>> hardware (kirkwood-km_kirkwood.dts).
>> When the driver registers its hcd, it fails with a timemout as it can be seen in
>> the below log:
>>> root at kmcoge5un:~# dmesg -n 8
>>> root at kmcoge5un:~# insmod ehci-orion.ko
>>> ehci-orion: EHCI orion driver
>>> Initializing Orion-SoC USB Host Controller
>>> orion-ehci f1050000.ehci: EHCI Host Controller
>>> orion-ehci f1050000.ehci: new USB bus registered, assigned bus number 1
>>> orion-ehci f1050000.ehci: reset hcs_params 0x10011 dbg=0 ind cc=0 pcc=0 ordered ports=1
>>> orion-ehci f1050000.ehci: reset hcc_params 0006 thresh 0 uframes 256/512/1024 park
>>> orion-ehci f1050000.ehci: park 0
>>> orion-ehci f1050000.ehci: reset command 0080002 (park)=0 ithresh=8 period=1024 Reset HALT
>>> orion-ehci f1050000.ehci: can't setup
>>> orion-ehci f1050000.ehci: USB bus 1 deregistered
>>> orion-ehci f1050000.ehci: init f1050000.ehci fail, -110
>>> orion-ehci: probe of f1050000.ehci failed with error -110
>> This is very similar to this problem, except that it always happens:
>> I have cornered it out to the last handshake() call of the ehci_halt() call,
>> that should set the controller in the HALT state. If I comment this handshake()
>> call out, the registration is fine and the controller then looks OK (I don't
>> have a hardware with a real USB bus to further test it yet).
can you specify what "real USB bus" means? Does your current hardware
support USB host or device with anything connected to it?
>> My current idea is that maybe a reset or an initialization may be missing, but I
>> wanted to ask if anybody already has seen a similar behavior with the various
>> hardware platform supported by ehci-orion ?
You might want to tryout chipidea DRC too. We do need some mvebu boiler
plate code to setup mbus registers but the IP definitely is chipidea.
> Do you know what phy the 98DX4122 uses? The ehci-orion.c has some code
> for handling the Orion5X USB phy. I also think u-boot might also have
> some code. Sebastian might know more, i think he implemented USB
> support for barebox.
From my experiments with MVEBU usb phy's I recall that (at least on
Armada 370/XP) ehci-orion will hang the system if PHYs are not setup by
bootloader. I cannot recall what happened on KW.
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