lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[MIPS] SNI PCIT CPLUS: workaround for b0rked irq wiring of onboard PCI bus 1

Browse Source 
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Thomas Bogendoerfer
2007-11-08 22:09:11 +01:00
committed by Ralf Baechle
parent f6771dbb27
commit fcee3faf83
1 changed files with 22 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
arch/mips/pci/fixup-sni.c
View File

@@ -113,6 +113,16 @@ static char irq_tab_pcit[13][5] __initdata = {
{ 0, INTA, INTB, INTC, INTD }, /* Slot 5 */ { 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) static inline int is_rm300_revd(void)
{ {
unsigned char csmsr = *(volatile unsigned char *)PCIMT_CSMSR; 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) int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{ {
switch (sni_brd_type) { switch (sni_brd_type) {
case SNI_BRD_PCI_TOWER:
case SNI_BRD_PCI_TOWER_CPLUS: 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]; return irq_tab_pcit[slot][pin];
case SNI_BRD_PCI_MTOWER: case SNI_BRD_PCI_MTOWER: