linux-kernel - Re: [PATCH 1/3] firewire: fw-ohci: PPC PMac platform code

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Date:	Sat, 01 Mar 2008 13:59:52 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Stefan Richter <stefanr@...6.in-berlin.de>
Cc:	linux1394-devel@...ts.sourceforge.net, linuxppc-dev@...abs.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] firewire: fw-ohci: PPC PMac platform code


> +#ifdef CONFIG_PPC_PMAC
> +	/* Necessary on some machines if fw-ohci was loaded/ unloaded before */
> +	if (machine_is(powermac)) {
> +		struct device_node *ofn = pci_device_to_OF_node(dev);
> +
> +		if (ofn) {
> +			pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 1);
> +			pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1);
> +		}
> +	}
> +#endif /* CONFIG_PPC_PMAC */

I -think- that the hunk above can be removed if you just call
pci_enable_device(). I have a hook in the arch pcibios_enable_device()
that detects the internal firewire and does the calls. Can you verify it
works ?

> +#ifdef CONFIG_PPC_PMAC
> +	/* On UniNorth, power down the cable and turn off the chip clock
> +	 * to save power on laptops */
> +	if (machine_is(powermac)) {
> +		struct device_node* ofn = pci_device_to_OF_node(dev);
> +
> +		if (ofn) {
> +			pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0);
> +			pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 0);
> +		}
> +	}
> +#endif /* CONFIG_PPC_PMAC */

Unfortunately, I don't have the pending hook here for disable so you
need to keep that one for now.

>  	kfree(&ohci->card);
>  
>  	fw_notify("Removed fw-ohci device.\n");
> @@ -2211,6 +2241,16 @@ static int pci_suspend(struct pci_dev *p
>  	if (err)
>  		fw_error("pci_set_power_state failed with %d\n", err);
>  
> +/* PowerMac suspend code comes last */
> +#ifdef CONFIG_PPC_PMAC
> +	if (machine_is(powermac)) {
> +		struct device_node *ofn = pci_device_to_OF_node(pdev);
> +
> +		if (ofn)
> +			pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0);
> +	}
> +#endif /* CONFIG_PPC_PMAC */

I wonder why we don't do the cable power thingy here...

Cheers,
Ben.


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