The Cortina Gemini has an internal PCI root bus, add this to
the device tree, and add interrupt mapping (swizzling) to the
relevant systems device trees.
Cc: Janos Laube <janos.dev@xxxxxxxxx>
Cc: Paulius Zaleckas <paulius.zaleckas@xxxxxxxxx>
Cc: Hans Ulli Kroll <ulli.kroll@xxxxxxxxxxxxxx>
Cc: Florian Fainelli <f.fainelli@xxxxxxxxx>
Cc: Gavin Guo <gavinguo@xxxxxxxxxxxxx>
Cc: Macpaul Lin <macpaul@xxxxxxxxxxxxx>
Cc: Feng-Hsin Chiang <john453@xxxxxxxxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
ChangeLog v1->v2:
- Change bus-range to <0x00 0xff>
- Drop the three extra IRQs that are unused
- Implement the right interrupt mapping/swizzling
- Push the interrupt mapping down to each affected system, only
SQ201 for now.
PCI maintainers: this is FYI only, I will funnel this to the ARM
SoC tree once we are done with the PCI driver.
---
arch/arm/boot/dts/gemini-sq201.dts | 22 ++++++++++++++++++++++
arch/arm/boot/dts/gemini.dtsi | 32 ++++++++++++++++++++++++++++++++
2 files changed, 54 insertions(+)
diff --git a/arch/arm/boot/dts/gemini-sq201.dts b/arch/arm/boot/dts/gemini-sq201.dts
index dae2a70d8fbc..46309e79cc7b 100644
--- a/arch/arm/boot/dts/gemini-sq201.dts
+++ b/arch/arm/boot/dts/gemini-sq201.dts
@@ -92,5 +92,27 @@
read-only;
};
};
+
+ pci@50000000 {
+ status = "okay";
+ interrupt-map-mask = <0xf800 0 0 7>;
+ interrupt-map =
+ <0x4800 0 0 1 &pci_intc 0>, /* Slot 9 */
+ <0x4800 0 0 2 &pci_intc 1>,
+ <0x4800 0 0 3 &pci_intc 2>,
+ <0x4800 0 0 4 &pci_intc 3>,
+ <0x5000 0 0 1 &pci_intc 1>, /* Slot 10 */
+ <0x5000 0 0 2 &pci_intc 2>,
+ <0x5000 0 0 3 &pci_intc 3>,
+ <0x5000 0 0 4 &pci_intc 0>,
+ <0x5800 0 0 1 &pci_intc 2>, /* Slot 11 */
+ <0x5800 0 0 2 &pci_intc 3>,
+ <0x5800 0 0 3 &pci_intc 0>,
+ <0x5800 0 0 4 &pci_intc 1>,
+ <0x6000 0 0 1 &pci_intc 3>, /* Slot 12 */
+ <0x6000 0 0 2 &pci_intc 0>,
+ <0x6000 0 0 3 &pci_intc 1>,
+ <0x6000 0 0 4 &pci_intc 2>;
+ };
};
};
diff --git a/arch/arm/boot/dts/gemini.dtsi b/arch/arm/boot/dts/gemini.dtsi
index ed2314a3a804..2eddc698795e 100644
--- a/arch/arm/boot/dts/gemini.dtsi
+++ b/arch/arm/boot/dts/gemini.dtsi
@@ -104,5 +104,37 @@
interrupt-controller;
#interrupt-cells = <2>;
};
+
+ pci@50000000 {
+ compatible = "faraday,pci";
+ /*
+ * The first 256 bytes in the IO range is actually used
+ * to configure the host bridge.
+ */
+ reg = <0x50000000 0x100>;
+ #address-cells = <3>;
+ #size-cells = <2>;
+ #interrupt-cells = <1>;
+ status = "disabled";
+
+ bus-range = <0x00 0xff>;
+ /* PCI ranges mappings */
+ ranges = /* 1MiB I/O space 0x50000000-0x500fffff */
+ <0x01000000 0 0 0x50000000 0 0x00100000>,
+ /* 128MiB non-prefetchable memory 0x58000000-0x5fffffff */
+ <0x02000000 0 0x58000000 0x58000000 0 0x08000000>;
+
+ /*
+ * This PCI host bridge variant has a cascaded interrupt
+ * controller embedded in the host bridge.
+ */
+ pci_intc: interrupt-controller {
+ interrupt-parent = <&intcon>;
+ interrupts = <8 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-controller;
+ #address-cells = <0>;
+ #interrupt-cells = <1>;
+ };
+ };
};
};
--
2.9.3
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