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On the Maple board, the AMD8111 IDE is in legacy mode... except that it
appears on IRQ 20 instead of IRQ 15. For drivers/ide this was handled by
the architecture's "pci_get_legacy_ide_irq()" function, but in libata we
just hard-code the numbers 14 and 15.
This patch provides asm-powerpc/libata-portmap.h which maps the IRQ as
appropriate, having added a pci_dev argument to the
ATA_{PRIM,SECOND}ARY_IRQ macros.
There's probably a better way to do this -- especially if we observe
that the _only_ case in which this seemingly-generic
"pci_get_legacy_ide_irq()" function returns anything other than 14 and
15 for primary and secondary respectively is the case of the AMD8111 on
the Maple board -- couldn't we handle that with a special case in the
pata_amd driver, or perhaps with a PCI quirk for Maple to switch it into
native mode during early boot and assign resources properly?
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
13 lines
334 B
C
13 lines
334 B
C
#ifndef __ASM_POWERPC_LIBATA_PORTMAP_H
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#define __ASM_POWERPC_LIBATA_PORTMAP_H
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#define ATA_PRIMARY_CMD 0x1F0
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#define ATA_PRIMARY_CTL 0x3F6
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#define ATA_PRIMARY_IRQ(dev) pci_get_legacy_ide_irq(dev, 0)
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#define ATA_SECONDARY_CMD 0x170
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#define ATA_SECONDARY_CTL 0x376
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#define ATA_SECONDARY_IRQ(dev) pci_get_legacy_ide_irq(dev, 1)
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#endif
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