Re: [PATCH V2 4/4] USB: UHCI: Support big endian GRUSBHC HC

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On Mon, 9 May 2011, Jan Andersson wrote:

> This patch adds support for big endian GRUSBHC UHCI controllers.
> The HCD bus glue will probe the register interface to determine
> the endianness of the controller.
> 
> Tested on GR-LEON4-ITX board which has a controller with little endian
> interface and on custom LEON3 board with a BE controller.

...

> diff --git a/drivers/usb/host/uhci-hcd.h b/drivers/usb/host/uhci-hcd.h
> index 22a4ce6..079fac3 100644
> --- a/drivers/usb/host/uhci-hcd.h
> +++ b/drivers/usb/host/uhci-hcd.h
> @@ -545,9 +545,18 @@ static inline void uhci_writeb(const struct uhci_hcd *uhci, u8 val, int reg)
>  #if defined(CONFIG_USB_UHCI_BIG_ENDIAN_MMIO)
>  /* Support (non-PCI) big endian host controllers */
>  #define uhci_big_endian_mmio(u)		((u)->big_endian_mmio)
> +/* Arch-specific big endian read/write functions */
> +#if defined(CONFIG_SPARC_LEON)
> +#define readl_be(addr)		__raw_readl(addr)
> +#define writel_be(val, addr)	__raw_writel(val, addr)
> +#define readw_be(addr)		__raw_readw(addr)
> +#define writew_be(val, addr)	__raw_writew(val, addr)
> +#define readb_be(addr)		__raw_readb(addr)
> +#define writeb_be(val, addr)	__raw_writeb(val, addr)
> +#endif  /* CONFIG_SPARC_LEON */

Shouldn't these things already be defined in an arch-specific header 
file?  Just like readl(), __raw_readl(), ... ?

Alan Stern

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