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x86: queensbay: Change PCIe root ports' interrupt routing 

So far interrupt routing works pretty well for any on-chip devices
on Intel Crown Bay. When inserting any PCIe card to any PCIe slot,
Linux kernel is smart enough to do interrupt swizzling and figure
out device's irq using its parent bridge's interrupt routing info
all the way up to its root port. In U-Boot all PCIe root ports'
interrupts were routed to PIRQ E/F/G/H before, while actually all
PCIe downstream ports received INTx are routed to PIRQ A/B/C/D
directly and not configurable. Now we change this mapping so that
any external PCIe device can work correctly.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2015-06-23 12:18:55 +08:00 committed by Simon Glass
parent 07a52865fe
commit cdb6babec6
2 changed files with 23 additions and 10 deletions
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13
arch/x86/cpu/queensbay/tnc.c
View File

@ -69,17 +69,18 @@ void cpu_irq_init(void)
* Route TunnelCreek PCI device interrupt pin to PIRQ
*
* Since PCIe downstream ports received INTx are routed to PIRQ
* A/B/C/D directly and not configurable, we route internal PCI
* device's INTx to PIRQ E/F/G/H.
* A/B/C/D directly and not configurable, we have to route PCIe
* root ports' INTx to PIRQ A/B/C/D as well. For other devices
* on TunneCreek, route them to PIRQ E/F/G/H.
*/
writew(PIRQE, &rcba->d02ir);
writew(PIRQF, &rcba->d03ir);
writew(PIRQG, &rcba->d27ir);
writew(PIRQH, &rcba->d31ir);
writew(PIRQE, &rcba->d23ir);
writew(PIRQF, &rcba->d24ir);
writew(PIRQG, &rcba->d25ir);
writew(PIRQH, &rcba->d26ir);
writew(PIRQA, &rcba->d23ir);
writew(PIRQB, &rcba->d24ir);
writew(PIRQC, &rcba->d25ir);
writew(PIRQD, &rcba->d26ir);
}
int arch_misc_init(void)

20
arch/x86/dts/crownbay.dts
View File

@ -169,10 +169,22 @@
/* TunnelCreek PCI devices */
PCI_BDF(0, 2, 0) INTA PIRQE
PCI_BDF(0, 3, 0) INTA PIRQF
PCI_BDF(0, 23, 0) INTA PIRQE
PCI_BDF(0, 24, 0) INTA PIRQF
PCI_BDF(0, 25, 0) INTA PIRQG
PCI_BDF(0, 26, 0) INTA PIRQH
PCI_BDF(0, 23, 0) INTA PIRQA
PCI_BDF(0, 23, 0) INTB PIRQB
PCI_BDF(0, 23, 0) INTC PIRQC
PCI_BDF(0, 23, 0) INTD PIRQD
PCI_BDF(0, 24, 0) INTA PIRQB
PCI_BDF(0, 24, 0) INTB PIRQC
PCI_BDF(0, 24, 0) INTC PIRQD
PCI_BDF(0, 24, 0) INTD PIRQA
PCI_BDF(0, 25, 0) INTA PIRQC
PCI_BDF(0, 25, 0) INTB PIRQD
PCI_BDF(0, 25, 0) INTC PIRQA
PCI_BDF(0, 25, 0) INTD PIRQB
PCI_BDF(0, 26, 0) INTA PIRQD
PCI_BDF(0, 26, 0) INTB PIRQA
PCI_BDF(0, 26, 0) INTC PIRQB
PCI_BDF(0, 26, 0) INTD PIRQC
PCI_BDF(0, 27, 0) INTA PIRQG
/*
* Topcliff PCI devices