Re: USB on AU1550

[Sylvain Munaut <tnt@246tNt.com>]

Maybe it's already in the code but That patch also activates the
OHCI_BIG_ENDIAN flag in the struct ohci_hcd. If not big endian mode
will be choosed only if USB_OHCI_LITTLE_ENDIAN is not selected as well
(both can be selected at once and if they are, it's that plag in the
hcd sruct that selects what to use)

	Sylvain

Herbert Valerio Riedel wrote:
> hello,
> 
> On Wed, 2005-09-28 at 15:52 -0500, Jay Monkman wrote:
> 
>>I'm trying to get USB working on my AU1550 board, and I'm getting an error I
>>don't understand. I've searched the web and the mailing list archives, but
>>haven't found anything relevant.
> 
> 
> there was a post of mine, dating back to 22 Nov 2004 which could have
> been relevant to your cause :-)
> 
> 
>>I'm using 2.6.12, in big-endian mode.
> 
> [..]
> 
>>Can anyone point me in the right direction to get this working?
> 
> 
> don't know whether you still require being pointed in to any direction;
> however, the following patch (against current GIT HEAD, works for me,
> YMMV :-) might provide a hint:
> 
> diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
> index ed1899d..914b964 100644
> --- a/drivers/usb/host/Kconfig
> +++ b/drivers/usb/host/Kconfig
> @@ -100,12 +100,14 @@ config USB_OHCI_HCD_PCI
>  config USB_OHCI_BIG_ENDIAN
>  	bool
>  	depends on USB_OHCI_HCD
> +	default y if SOC_AU1X00 && CPU_BIG_ENDIAN
>  	default n
>  
>  config USB_OHCI_LITTLE_ENDIAN
>  	bool
>  	depends on USB_OHCI_HCD
>  	default n if STB03xxx || PPC_MPC52xx
> +	default n if SOC_AU1X00 && CPU_BIG_ENDIAN
>  	default y
>  
>  config USB_UHCI_HCD
> diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
> index caacf14..bf18351 100644
> --- a/drivers/usb/host/ohci.h
> +++ b/drivers/usb/host/ohci.h
> @@ -462,6 +462,11 @@ static inline struct usb_hcd *ohci_to_hc
>  #define writel_be(val, addr)	out_be32((__force unsigned *)addr, val)
>  #endif
>  
> +#if defined(CONFIG_SOC_AU1X00)
> +#define readl_be(addr)          __raw_readl((__force u32 *)(addr))
> +#define writel_be(val, addr)    __raw_writel(val, (__force u32 *)(addr))
> +#endif
> +
>  static inline unsigned int ohci_readl (const struct ohci_hcd *ohci,
>  							__hc32 __iomem * regs)
>  {
> 
> 
> greetings,