diff options
| author | Bin Meng <bmeng.cn@gmail.com> | 2015-06-23 12:18:55 +0800 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-07-14 18:03:17 -0600 |
| commit | cdb6babec6422ad4b89e447b1b468f625deaea79 (patch) | |
| tree | 4678935bdb10fb21eb4729629b547f0d1fd93859 | |
| parent | 07a52865fe4a2e8bce16d9d8f8a61c66b3afa9ee (diff) | |
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>
| -rw-r--r-- | arch/x86/cpu/queensbay/tnc.c | 13 | ||||
| -rw-r--r-- | arch/x86/dts/crownbay.dts | 20 |
2 files changed, 23 insertions, 10 deletions
diff --git a/arch/x86/cpu/queensbay/tnc.c b/arch/x86/cpu/queensbay/tnc.c index 873de7be9d..d27b2d9ec6 100644 --- a/arch/x86/cpu/queensbay/tnc.c +++ b/arch/x86/cpu/queensbay/tnc.c @@ -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) diff --git a/arch/x86/dts/crownbay.dts b/arch/x86/dts/crownbay.dts index b77c65a463..60da1f544b 100644 --- a/arch/x86/dts/crownbay.dts +++ b/arch/x86/dts/crownbay.dts @@ -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 |