i.MX353: mxc-ehci.0

On Mon, Aug 23, 2010 at 07:28:09PM -0500, H Hartley Sweeten wrote:

On Monday, August 23, 2010 4:45 PM, H Hartley Sweeten wrote:

quoted

Hello all,

What "magic" setup do I need to enable mxc-ehci.0 as a host controller?

I pulled git://git.pengutronix.de/git/imx/linux-2.6.git and have the
imx-for-2.6.37 branch compiled and booting, but I get this:

ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
mxc-ehci mxc-ehci.1: initializing i.MX USB Controller
mxc-ehci mxc-ehci.1: Freescale On-Chip EHCI Host Controller
mxc-ehci mxc-ehci.1: new USB bus registered, assigned bus number 1
mxc-ehci mxc-ehci.1: irq 35, io mem 0x53ff4400
mxc-ehci mxc-ehci.1: USB 2.0 started, EHCI 1.00
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected

It appears mxc-ehci.1 is working but I don't have that port on my board.

This is using the mach-mx35_3ds.c board configuration.

Well, I think I'm closer...

I removed the OTG platform data and the register of the mxc_otg_udc_device
from mach-mx35_3ds.c.  I replaced them with the following:

static struct mxc_usbh_platform_data usb_otg_host_pdata = {
	.portsc		= MXC_EHCI_MODE_SERIAL,
	.flags		= MXC_EHCI_INTERFACE_SINGLE_UNI |
			  MXC_EHCI_INTERNAL_PHY,
};

This must match your hardware. The i.MX35 has a UTMI phy connected to
the otg core, INTERFACE_SINGLE_UNI seems wrong here. I don't know your
hardware, it may also be that you have an external ULPI phy connected.

Sascha


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