Commit d237bf49 authored by Thibaut VARENE's avatar Thibaut VARENE Committed by Linus Torvalds

[PATCH] ide: restore support for AEC6280M cards in aec62xx.c

This patch adds missing initialization sequence, necessary to get the
"Macintosh" version of AEC6280 cards to work in Linux.  Without this patch,
the driver hangs for several minutes trying to initialize the card and the
kernel is left in an unstable state.  This patch has been tested fine on
ppc and i386.
Signed-off-by: default avatarThibaut VARENE <varenet@parisc-linux.org>
Acked-by: default avatarBartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 75b84e94
......@@ -262,6 +262,21 @@ static unsigned int __devinit init_chipset_aec62xx(struct pci_dev *dev, const ch
else
pci_set_drvdata(dev, (void *) aec6xxx_34_base);
/* These are necessary to get AEC6280 Macintosh cards to work */
if ((dev->device == PCI_DEVICE_ID_ARTOP_ATP865) ||
(dev->device == PCI_DEVICE_ID_ARTOP_ATP865R)) {
u8 reg49h = 0, reg4ah = 0;
/* Clear reset and test bits. */
pci_read_config_byte(dev, 0x49, &reg49h);
pci_write_config_byte(dev, 0x49, reg49h & ~0x30);
/* Enable chip interrupt output. */
pci_read_config_byte(dev, 0x4a, &reg4ah);
pci_write_config_byte(dev, 0x4a, reg4ah & ~0x01);
/* Enable burst mode. */
pci_read_config_byte(dev, 0x4a, &reg4ah);
pci_write_config_byte(dev, 0x4a, reg4ah | 0x80);
}
return dev->irq;
}
......
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