[PATH] ppc32: Add usb support to IBM stb04xxx platforms

[Eugene Surovegin]

On Tue, Aug 09, 2005 at 11:53:27AM -0700, Dale Farnsworth wrote:
[snip]

> Index: linux-2.5-usb-405/arch/ppc/platforms/4xx/redwood5.c
> ===================================================================
> --- linux-2.5-usb-405.orig/arch/ppc/platforms/4xx/redwood5.c
> +++ linux-2.5-usb-405/arch/ppc/platforms/4xx/redwood5.c
> @@ -52,8 +52,18 @@
>  void __init
>  redwood5_setup_arch(void)
>  {
> +	u32 mask;
> +
>  	ppc4xx_setup_arch();
>  
> +	/*
> +	 * Set up USB interrupt as positive polarity and level-sensitive.
> +	 * Firmware should do this, but apparently does not.
> +	 */
> +	mask = 1 << (31 - USB0_IRQ);
> +	mtdcr(DCRN_UIC_PR(UIC0), mfdcr(DCRN_UIC_PR(UIC0)) | mask);
> +	mtdcr(DCRN_UIC_TR(UIC0), mfdcr(DCRN_UIC_TR(UIC0)) & ~mask);
> +

Please, DO NOT DO THIS. 

There is a way to configure UIC settings without messing with UIC 
registers directly. Refer to asm-ppc/ppc4xx_pic.h and other 4xx board 
ports for more information.

-- 
Eugene