From fcee3faf8339bb65660c9a22123f71aa0cc30514 Mon Sep 17 00:00:00 2001 From: Thomas Bogendoerfer Date: Thu, 8 Nov 2007 22:09:11 +0100 Subject: [MIPS] SNI PCIT CPLUS: workaround for b0rked irq wiring of onboard PCI bus 1 Signed-off-by: Thomas Bogendoerfer Signed-off-by: Ralf Baechle --- arch/mips/pci/fixup-sni.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) (limited to 'arch/mips/pci/fixup-sni.c') 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: -- cgit v1.2.1