[U-Boot] Adding USBH2 support for mx31pdk

[Wolfgang Grandegger]

Hi Fabio,

On 10/21/2011 02:54 PM, Fabio Estevam wrote:
> Hi Stefano,
> 
> I am trying to add USBH2 support for MX31PDK and I am using qong code
> as reference.
> 
> When I add the USB related defines in mx31pdk.h (same as qong.h) :
> 
> /* USB */
> #define CONFIG_CMD_USB
> #ifdef CONFIG_CMD_USB
> #define CONFIG_USB_EHCI			/* Enable EHCI USB support */
> #define CONFIG_USB_EHCI_MXC
> #define CONFIG_EHCI_HCD_INIT_AFTER_RESET
> #define CONFIG_MXC_USB_PORT	2
> #define CONFIG_MXC_USB_PORTSC	(MXC_EHCI_MODE_ULPI | MXC_EHCI_UTMI_8BIT)
> #define CONFIG_MXC_USB_FLAGS	MXC_EHCI_POWER_PINS_ENABLED
> #define CONFIG_EHCI_IS_TDI
> #define CONFIG_USB_STORAGE
> #define CONFIG_DOS_PARTITION
> #define CONFIG_SUPPORT_VFAT
> #define CONFIG_CMD_EXT2
> #define CONFIG_CMD_FAT
> #endif /* CONFIG_CMD_USB */
> 
> , the mx31pdk board no longer boots.
> 
> I also took care of the USBH2 IOMUX, but even without the IOMUX the
> board does not boot.

Is the IOMUX setup correct?

> Do you see anything obvious that I am missing here? Does qong board
> boot fine on your top of tree git?

The USB pins do need to be setup properly? Search for "usb" in qong.c
and have a look to

http://lxr.linux.no/#linux+v3.0.4/arch/arm/mach-imx/mach-mx31_3ds.c

Hope it helps.

Wolfgang.