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[PATCH] via-rhine: add option avoid_D3 (work around broken BIOSes)

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It looks like broken BIOSes controlling Rhine chips will remain in use in
significant numbers; such systems fail to come up via PXE after they have
been put into D3 (power-saving) mode.

This patch adds a module option for disabling the call that puts the chip
to sleep.

Signed-off-by: Roger Luethi <rl@hellgate.ch>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Joerg Bashir <brak@archive.org>
Cc: Tim Phipps <tim@phipps-hutton.freeserve.co.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Roger Luethi 2006-08-14 23:00:21 -07:00 committed by Jeff Garzik
parent 76cb4fe7c0
commit b933b4d938
1 changed files with 11 additions and 1 deletions
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10
drivers/net/via-rhine.c
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@ -44,6 +44,10 @@ static int max_interrupt_work = 20;
Setting to > 1518 effectively disables this feature. */
static int rx_copybreak;
/* Work-around for broken BIOSes: they are unable to get the chip back out of
power state D3 so PXE booting fails. bootparam(7): via-rhine.avoid_D3=1 */
static int avoid_D3;
/*
* In case you are looking for 'options[]' or 'full_duplex[]', they
* are gone. Use ethtool(8) instead.
@ -120,9 +124,11 @@ MODULE_LICENSE("GPL");
module_param(max_interrupt_work, int, 0);
module_param(debug, int, 0);
module_param(rx_copybreak, int, 0);
module_param(avoid_D3, bool, 0);
MODULE_PARM_DESC(max_interrupt_work, "VIA Rhine maximum events handled per interrupt");
MODULE_PARM_DESC(debug, "VIA Rhine debug level (0-7)");
MODULE_PARM_DESC(rx_copybreak, "VIA Rhine copy breakpoint for copy-only-tiny-frames");
MODULE_PARM_DESC(avoid_D3, "Avoid power state D3 (work-around for broken BIOSes)");
/*
Theory of Operation
@ -823,6 +829,9 @@ static int __devinit rhine_init_one(struct pci_dev *pdev,
}
}
rp->mii_if.phy_id = phy_id;
if (debug > 1 && avoid_D3)
printk(KERN_INFO "%s: No D3 power state at shutdown.\n",
dev->name);
return 0;
@ -1911,6 +1920,7 @@ static void rhine_shutdown (struct pci_dev *pdev)
}
/* Hit power state D3 (sleep) */
if (!avoid_D3)
iowrite8(ioread8(ioaddr + StickyHW) | 0x03, ioaddr + StickyHW);
/* TODO: Check use of pci_enable_wake() */