From: Eugene Surovegin <ebs@ebshome.net>
To: Dale Farnsworth <dale@farnsworth.org>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: [PATCH 2.6.10-rc2] ppc32: Add usb support to IBM stb04xxx platforms including Redwood5
Date: Wed, 30 Mar 2005 17:07:47 -0800 [thread overview]
Message-ID: <20050331010747.GA18254@gate.ebshome.net> (raw)
In-Reply-To: <20050331000521.GA22041@xyzzy>
On Wed, Mar 30, 2005 at 05:05:21PM -0700, Dale Farnsworth wrote:
[snip]
> +/* Power up the USB subsection */
> +static int enable_usb(struct platform_device *pdev)
> +{
> + u32 mask;
> +
> + 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);
> + return 0;
> +}
> +
> +/* Power down the USB subsection */
> +static void disable_usb(struct platform_device *pdev)
> +{
> + u32 mask;
> +
> + 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);
> +}
Dale, I'm curious, what's going on here :) ?.
How changing polarity and triggering setting could power-down USB
unit? Some STB funkiness?
--
Eugene
next prev parent reply other threads:[~2005-03-31 1:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-31 0:05 [PATCH 2.6.10-rc2] ppc32: Add usb support to IBM stb04xxx platforms including Redwood5 Dale Farnsworth
2005-03-31 1:07 ` Eugene Surovegin [this message]
2005-03-31 5:18 ` Dale Farnsworth
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