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| author | Ivan Kokshaysky <ink@jurassic.park.msu.ru> | 2008-06-21 03:28:54 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-06-20 16:46:10 -0700 |
| commit | a744e0160ac5804b763449aa34d3991dc21af0be (patch) | |
| tree | e646b305bef58b6fa5f1b0fda4de5974ca1e5df3 /arch/alpha | |
| parent | d559d4a24a3fed75bd890abcc1f95cd8d8dad6e1 (diff) | |
| download | op-kernel-dev-a744e0160ac5804b763449aa34d3991dc21af0be.zip op-kernel-dev-a744e0160ac5804b763449aa34d3991dc21af0be.tar.gz | |
alpha: resurrect Cypress IDE quirk
Which was removed in the hope that generic legacy IDE quirk in
drivers/pci/probe.c is sufficient for Cypress IDE.
It isn't, as this controller has non-standard BAR layout:
secondary channel registers are in the BAR0-1 of the second
PCI function - not in the BAR2-3 of the same function, as the
generic quirk routine assumes.
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/alpha')
| -rw-r--r-- | arch/alpha/kernel/pci.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c index 36ab22a..5cf45fc 100644 --- a/arch/alpha/kernel/pci.c +++ b/arch/alpha/kernel/pci.c @@ -71,6 +71,23 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82378, quirk_i static void __init quirk_cypress(struct pci_dev *dev) { + /* The Notorious Cy82C693 chip. */ + + /* The generic legacy mode IDE fixup in drivers/pci/probe.c + doesn't work correctly with the Cypress IDE controller as + it has non-standard register layout. Fix that. */ + if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE) { + dev->resource[2].start = dev->resource[3].start = 0; + dev->resource[2].end = dev->resource[3].end = 0; + dev->resource[2].flags = dev->resource[3].flags = 0; + if (PCI_FUNC(dev->devfn) == 2) { + dev->resource[0].start = 0x170; + dev->resource[0].end = 0x177; + dev->resource[1].start = 0x376; + dev->resource[1].end = 0x376; + } + } + /* The Cypress bridge responds on the PCI bus in the address range 0xffff0000-0xffffffff (conventional x86 BIOS ROM). There is no way to turn this off. The bridge also supports several extended |
