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authorIvan Kokshaysky <ink@jurassic.park.msu.ru>2008-06-20 19:28:54 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-06-20 19:46:10 -0400
commita744e0160ac5804b763449aa34d3991dc21af0be (patch)
treee646b305bef58b6fa5f1b0fda4de5974ca1e5df3 /arch/alpha
parentd559d4a24a3fed75bd890abcc1f95cd8d8dad6e1 (diff)
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.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
index 36ab22a7ea12..5cf45fc51343 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
71static void __init 71static void __init
72quirk_cypress(struct pci_dev *dev) 72quirk_cypress(struct pci_dev *dev)
73{ 73{
74 /* The Notorious Cy82C693 chip. */
75
76 /* The generic legacy mode IDE fixup in drivers/pci/probe.c
77 doesn't work correctly with the Cypress IDE controller as
78 it has non-standard register layout. Fix that. */
79 if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE) {
80 dev->resource[2].start = dev->resource[3].start = 0;
81 dev->resource[2].end = dev->resource[3].end = 0;
82 dev->resource[2].flags = dev->resource[3].flags = 0;
83 if (PCI_FUNC(dev->devfn) == 2) {
84 dev->resource[0].start = 0x170;
85 dev->resource[0].end = 0x177;
86 dev->resource[1].start = 0x376;
87 dev->resource[1].end = 0x376;
88 }
89 }
90
74 /* The Cypress bridge responds on the PCI bus in the address range 91 /* The Cypress bridge responds on the PCI bus in the address range
75 0xffff0000-0xffffffff (conventional x86 BIOS ROM). There is no 92 0xffff0000-0xffffffff (conventional x86 BIOS ROM). There is no
76 way to turn this off. The bridge also supports several extended 93 way to turn this off. The bridge also supports several extended