[PATCH] kernel .config options to enable USB on a Wandboard (and other i.MX systems)

[Niels de Vos]

Hi Peter and others,

The following .config options make it possible to use USB on a Wandboard 
Duallite and likely other i.MX based boards. USB works for me after 
loading the modules manually:

[root@wandboard ~]# modprobe ci13xxx_imx
[root@wandboard ~]# modprobe usbmisc_imx
[root@wandboard ~]# dmesg
...
[  191.791974] imx_usb 2184200.usb: pinctrl get/select failed, err=-19
[  191.796368] ci_hdrc ci_hdrc.0: doesn't support gadget
[  191.796396] ci_hdrc ci_hdrc.0: EHCI Host Controller
[  191.796733] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 1
[  191.811471] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00
[  191.811583] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[  191.811599] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[  191.811612] usb usb1: Product: EHCI Host Controller
[  191.811624] usb usb1: Manufacturer: Linux 3.10.0-1.0.imx.fc20.armv7hl ehci_hcd
[  191.811633] usb usb1: SerialNumber: ci_hdrc.0
[  191.812443] hub 1-0:1.0: USB hub found
[  191.812476] hub 1-0:1.0: 1 port detected
...

A test-build that includes these options and that I used for 
verification testing is temporarily available from koji:
- http://arm.koji.fedoraproject.org/koji/taskinfo?taskID=1975489

I have made modifications to arm-boot-config that can boot this kernel 
on an unmodified from upstream u-boot. A patch for a-b-c should follow 
in a few days. Grubby needs to be able to set the LOADADDR correctly, 
and I still have to look into that (/etc/sysconfig/uboot can be used 
until grubby knows about Wandboards).

Thanks,
Niels

---
 config-armv7 | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/config-armv7 b/config-armv7
index b598a02..3a8a2e5 100644
--- a/config-armv7
+++ b/config-armv7
@@ -397,6 +397,10 @@ CONFIG_IMX_HAVE_PLATFORM_MXC_NAND=y
 CONFIG_IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX=y
 CONFIG_IMX_HAVE_PLATFORM_SPI_IMX=y
 CONFIG_PATA_IMX=m
+CONFIG_USB_CHIPIDEA=m
+CONFIG_USB_CHIPIDEA_UDC=y
+CONFIG_USB_CHIPIDEA_HOST=y
+# CONFIG_USB_CHIPIDEA_DEBUG is not set
 CONFIG_NET_VENDOR_FREESCALE=y
 CONFIG_FEC=m
 CONFIG_KEYBOARD_IMX=m
-- 
1.8.2.1

[Kyle McMartin]

On Thu, Jul 11, 2013 at 05:05:55PM +0200, Niels de Vos wrote:
>  [root@wandboard ~]# modprobe ci13xxx_imx
>  [root@wandboard ~]# modprobe usbmisc_imx
>  [root@wandboard ~]# dmesg 
Looks good to me, applied.

[Niels de Vos]

On Thu, Jul 11, 2013 at 11:25:44AM -0400, Kyle McMartin wrote:
>  On Thu, Jul 11, 2013 at 05:05:55PM +0200, Niels de Vos wrote:
>  > [root@wandboard ~]# modprobe ci13xxx_imx
>  > [root@wandboard ~]# modprobe usbmisc_imx
>  > [root@wandboard ~]# dmesg
>  
>  Looks good to me, applied. 
Great, thanks!

[Dennis Gilmore]

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On Thu, 11 Jul 2013 17:05:55 +0200
Niels de Vos <devos(a)fedoraproject.org&gt; wrote:

>  Hi Peter and others,
>  
>  The following .config options make it possible to use USB on a
>  Wandboard Duallite and likely other i.MX based boards. USB works for
>  me after loading the modules manually:
>  
>  [root@wandboard ~]# modprobe ci13xxx_imx
>  [root@wandboard ~]# modprobe usbmisc_imx
>  [root@wandboard ~]# dmesg
>  ...
>  [  191.791974] imx_usb 2184200.usb: pinctrl get/select failed, err=-19
>  [  191.796368] ci_hdrc ci_hdrc.0: doesn't support gadget
>  [  191.796396] ci_hdrc ci_hdrc.0: EHCI Host Controller
>  [  191.796733] ci_hdrc ci_hdrc.0: new USB bus registered, assigned
>  bus number 1 [  191.811471] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI
>  1.00 [  191.811583] usb usb1: New USB device found, idVendor=1d6b,
>  idProduct=0002 [  191.811599] usb usb1: New USB device strings:
>  Mfr=3, Product=2, SerialNumber=1 [  191.811612] usb usb1: Product:
>  EHCI Host Controller [  191.811624] usb usb1: Manufacturer: Linux
>  3.10.0-1.0.imx.fc20.armv7hl ehci_hcd [  191.811633] usb usb1:
>  SerialNumber: ci_hdrc.0 [  191.812443] hub 1-0:1.0: USB hub found
>  [  191.812476] hub 1-0:1.0: 1 port detected
>  ...
>  
>  A test-build that includes these options and that I used for 
>  verification testing is temporarily available from koji:
>  - http://arm.koji.fedoraproject.org/koji/taskinfo?taskID=1975489
>  
>  I have made modifications to arm-boot-config that can boot this
>  kernel on an unmodified from upstream u-boot. A patch for a-b-c
>  should follow in a few days. Grubby needs to be able to set the
>  LOADADDR correctly, and I still have to look into that
>  (/etc/sysconfig/uboot can be used until grubby knows about
>  Wandboards).
>  
ive started working on setting up wandboard u-boot to work in the way we
will want going forward. ultimately i want to use the sysboot command
in the pxe support to load a extlinux style config file on arm systems

Dennis
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[Dennis Gilmore]

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Hash: SHA1

On Thu, 11 Jul 2013 17:05:55 +0200
Niels de Vos <devos(a)fedoraproject.org&gt; wrote:

>  Hi Peter and others,
>  
>  The following .config options make it possible to use USB on a
>  Wandboard Duallite and likely other i.MX based boards. USB works for
>  me after loading the modules manually:
>  
>  [root@wandboard ~]# modprobe ci13xxx_imx
>  [root@wandboard ~]# modprobe usbmisc_imx
>  [root@wandboard ~]# dmesg
>  
tested your scratch build on my wandboard quad i only had to load
usbmisc_imx as ci13xxx_imx was already loaded. I wonder if we need to
patch dracut to pull the module into the initramfs and it will just
work.

Dennis
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>

[Niels de Vos]

On Fri, Jul 12, 2013 at 01:33:52AM -0500, Dennis Gilmore wrote:
>  -----BEGIN PGP SIGNED MESSAGE-----
>  Hash: SHA1
>  
>  On Thu, 11 Jul 2013 17:05:55 +0200
>  Niels de Vos <devos(a)fedoraproject.org&gt; wrote:
>  
>  > Hi Peter and others,
>  > 
>  > The following .config options make it possible to use USB on a
>  > Wandboard Duallite and likely other i.MX based boards. USB works for
>  > me after loading the modules manually:
>  > 
>  > [root@wandboard ~]# modprobe ci13xxx_imx
>  > [root@wandboard ~]# modprobe usbmisc_imx
>  > [root@wandboard ~]# dmesg
>  
>  tested your scratch build on my wandboard quad i only had to load
>  usbmisc_imx as ci13xxx_imx was already loaded. I wonder if we need to
>  patch dracut to pull the module into the initramfs and it will just
>  work. 
I think loading the modules should happen automatically and depends on 
the dtb that is used. The ci13xxx_imx supports USB-OTG and there are 
some references to that in the dtb for the Quad, but fewer for the 
Duallite. At least, thats my understanding after a quick look.

Whatever should trigger loading if usbmisc-imx is unclear to me. Maybe 
there should be an option to include the usbmisc_imx module in 
ci13xxx_imx... Oh well, something to ponder about later. Ideas welcome!

Thanks,
Niels

[Niels de Vos]

On Fri, Jul 12, 2013 at 10:27:59AM +0200, Niels de Vos wrote:
>  On Fri, Jul 12, 2013 at 01:33:52AM -0500, Dennis Gilmore wrote:
>  > -----BEGIN PGP SIGNED MESSAGE-----
>  > Hash: SHA1
>  > 
>  > On Thu, 11 Jul 2013 17:05:55 +0200
>  > Niels de Vos <devos(a)fedoraproject.org&gt; wrote:
>  > 
>  > > Hi Peter and others,
>  > > 
>  > > The following .config options make it possible to use USB on a
>  > > Wandboard Duallite and likely other i.MX based boards. USB works for
>  > > me after loading the modules manually:
>  > > 
>  > > [root@wandboard ~]# modprobe ci13xxx_imx
>  > > [root@wandboard ~]# modprobe usbmisc_imx
>  > > [root@wandboard ~]# dmesg
>  > 
>  > tested your scratch build on my wandboard quad i only had to load
>  > usbmisc_imx as ci13xxx_imx was already loaded. I wonder if we need to
>  > patch dracut to pull the module into the initramfs and it will just
>  > work.
>  
>  I think loading the modules should happen automatically and depends on 
>  the dtb that is used. The ci13xxx_imx supports USB-OTG and there are 
>  some references to that in the dtb for the Quad, but fewer for the 
>  Duallite. At least, thats my understanding after a quick look.
>  
>  Whatever should trigger loading if usbmisc-imx is unclear to me. Maybe 
>  there should be an option to include the usbmisc_imx module in 
>  ci13xxx_imx... Oh well, something to ponder about later. Ideas welcome! 
The dtb and all are good. The usbmisc-imx module is only missing the 
alias information for automatic detection/loading. The table that 
contains this information in the module is not exported, and depmod does 
not generate the details, so that modprobe does not know to load the 
module. A one-line patch makes this work, and it seems that this already 
has been merged upstream too:
- http://thread.gmane.org/gmane.linux.usb.general/88501
  (commit-id in Linus' tree: 269b83dc9ce007efc4393e8a5b77f208a0e18e4a)

Cheers,
Niels

[Peter Robinson]

On Fri, Jul 12, 2013 at 7:33 AM, Dennis Gilmore <dennis(a)ausil.us&gt; wrote:
>  -----BEGIN PGP SIGNED MESSAGE-----
>  Hash: SHA1
>
>  On Thu, 11 Jul 2013 17:05:55 +0200
>  Niels de Vos <devos(a)fedoraproject.org&gt; wrote:
>
> > Hi Peter and others,
> >
> > The following .config options make it possible to use USB on a
> > Wandboard Duallite and likely other i.MX based boards. USB works for
> > me after loading the modules manually:
> >
> > [root@wandboard ~]# modprobe ci13xxx_imx
> > [root@wandboard ~]# modprobe usbmisc_imx
> > [root@wandboard ~]# dmesg
>
>  tested your scratch build on my wandboard quad i only had to load
>  usbmisc_imx as ci13xxx_imx was already loaded. I wonder if we need to
>  patch dracut to pull the module into the initramfs and it will just
>  work. 
It'll be because the right glue bits aren't yet in the dtb file so
there should be no need to add any manual loading for the initramfs
esp if the rootfs isn't on the usb bus.

Peter