71 lines
2.4 KiB
Plaintext
71 lines
2.4 KiB
Plaintext
* Mobiveil AXI PCIe Root Port Bridge DT description
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Mobiveil's GPEX 4.0 is a PCIe Gen4 root port bridge IP. This configurable IP
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has up to 8 outbound and inbound windows for the address translation.
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Required properties:
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- #address-cells: Address representation for root ports, set to <3>
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- #size-cells: Size representation for root ports, set to <2>
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- #interrupt-cells: specifies the number of cells needed to encode an
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interrupt source. The value must be 1.
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- compatible: Should contain "mbvl,gpex40-pcie"
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- reg: Should contain PCIe registers location and length
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"config_axi_slave": PCIe controller registers
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"csr_axi_slave" : Bridge config registers
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"gpio_slave" : GPIO registers to control slot power
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"apb_csr" : MSI registers
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- device_type: must be "pci"
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- apio-wins : number of requested apio outbound windows
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default 2 outbound windows are configured -
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1. Config window
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2. Memory window
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- ppio-wins : number of requested ppio inbound windows
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default 1 inbound memory window is configured.
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- bus-range: PCI bus numbers covered
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- interrupt-controller: identifies the node as an interrupt controller
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- #interrupt-cells: specifies the number of cells needed to encode an
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interrupt source. The value must be 1.
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- interrupts: The interrupt line of the PCIe controller
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last cell of this field is set to 4 to
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denote it as IRQ_TYPE_LEVEL_HIGH type interrupt.
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- interrupt-map-mask,
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interrupt-map: standard PCI properties to define the mapping of the
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PCI interface to interrupt numbers.
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- ranges: ranges for the PCI memory regions (I/O space region is not
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supported by hardware)
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Please refer to the standard PCI bus binding document for a more
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detailed explanation
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Example:
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++++++++
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pcie0: pcie@a0000000 {
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#address-cells = <3>;
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#size-cells = <2>;
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compatible = "mbvl,gpex40-pcie";
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reg = <0xa0000000 0x00001000>,
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<0xb0000000 0x00010000>,
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<0xff000000 0x00200000>,
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<0xb0010000 0x00001000>;
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reg-names = "config_axi_slave",
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"csr_axi_slave",
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"gpio_slave",
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"apb_csr";
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device_type = "pci";
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apio-wins = <2>;
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ppio-wins = <1>;
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bus-range = <0x00000000 0x000000ff>;
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interrupt-controller;
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interrupt-parent = <&gic>;
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#interrupt-cells = <1>;
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interrupts = < 0 89 4 >;
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interrupt-map-mask = <0 0 0 7>;
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interrupt-map = <0 0 0 0 &pci_express 0>,
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<0 0 0 1 &pci_express 1>,
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<0 0 0 2 &pci_express 2>,
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<0 0 0 3 &pci_express 3>;
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ranges = < 0x83000000 0 0x00000000 0xa8000000 0 0x8000000>;
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};
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