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authorThomas Bogendoerfer <tsbogend@alpha.franken.de>2007-11-08 22:09:11 +0100
committerRalf Baechle <ralf@linux-mips.org>2007-11-15 23:21:50 +0000
commitfcee3faf8339bb65660c9a22123f71aa0cc30514 (patch)
treecd0f28ed904d6b52f613e6ef117838e8820215dc
parentf6771dbb27c704ce837ba3bb1dcaa53f48f76ea8 (diff)
downloadlinux-stericsson-fcee3faf8339bb65660c9a22123f71aa0cc30514.tar.gz
[MIPS] SNI PCIT CPLUS: workaround for b0rked irq wiring of onboard PCI bus 1
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
-rw-r--r--arch/mips/pci/fixup-sni.c23
1 files changed, 22 insertions, 1 deletions
diff --git a/arch/mips/pci/fixup-sni.c b/arch/mips/pci/fixup-sni.c
index a45bedd17233..5c8a79bb2661 100644
--- a/arch/mips/pci/fixup-sni.c
+++ b/arch/mips/pci/fixup-sni.c
@@ -113,6 +113,16 @@ static char irq_tab_pcit[13][5] __initdata = {
{ 0, INTA, INTB, INTC, INTD }, /* Slot 5 */
};
+static char irq_tab_pcit_cplus[13][5] __initdata = {
+ /* INTA INTB INTC INTD */
+ { 0, 0, 0, 0, 0 }, /* HOST bridge */
+ { 0, INTB, INTC, INTD, INTA }, /* PCI Slot 9 */
+ { 0, 0, 0, 0, 0 }, /* PCI-EISA */
+ { 0, 0, 0, 0, 0 }, /* Unused */
+ { 0, INTA, INTB, INTC, INTD }, /* PCI-PCI bridge */
+ { 0, INTB, INTC, INTD, INTA }, /* fixup */
+};
+
static inline int is_rm300_revd(void)
{
unsigned char csmsr = *(volatile unsigned char *)PCIMT_CSMSR;
@@ -123,8 +133,19 @@ static inline int is_rm300_revd(void)
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
switch (sni_brd_type) {
- case SNI_BRD_PCI_TOWER:
case SNI_BRD_PCI_TOWER_CPLUS:
+ if (slot == 4) {
+ /*
+ * SNI messed up interrupt wiring for onboard
+ * PCI bus 1; we need to fix this up here
+ */
+ while (dev && dev->bus->number != 1)
+ dev = dev->bus->self;
+ if (dev && dev->devfn >= PCI_DEVFN(4, 0))
+ slot = 5;
+ }
+ return irq_tab_pcit_cplus[slot][pin];
+ case SNI_BRD_PCI_TOWER:
return irq_tab_pcit[slot][pin];
case SNI_BRD_PCI_MTOWER: