1 * Mobiveil AXI PCIe Root Port Bridge DT description
2
3 Mobiveil's GPEX 4.0 is a PCIe Gen4 root port bridge IP. This configurable IP
4 has up to 8 outbound and inbound windows for the address translation.
5
6 Required properties:
7 - #address-cells: Address representation for root ports, set to <3>
8 - #size-cells: Size representation for root ports, set to <2>
9 - #interrupt-cells: specifies the number of cells needed to encode an
10 interrupt source. The value must be 1.
11 - compatible: Should contain "mbvl,gpex40-pcie"
12 - reg: Should contain PCIe registers location and length
13 Mandatory:
14 "config_axi_slave": PCIe controller registers
15 "csr_axi_slave" : Bridge config registers
16 Optional:
17 "gpio_slave" : GPIO registers to control slot power
18 "apb_csr" : MSI registers
19
20 - device_type: must be "pci"
21 - apio-wins : number of requested apio outbound windows
22 default 2 outbound windows are configured -
23 1. Config window
24 2. Memory window
25 - ppio-wins : number of requested ppio inbound windows
26 default 1 inbound memory window is configured.
27 - bus-range: PCI bus numbers covered
28 - interrupt-controller: identifies the node as an interrupt controller
29 - #interrupt-cells: specifies the number of cells needed to encode an
30 interrupt source. The value must be 1.
31 - interrupts: The interrupt line of the PCIe controller
32 last cell of this field is set to 4 to
33 denote it as IRQ_TYPE_LEVEL_HIGH type interrupt.
34 - interrupt-map-mask,
35 interrupt-map: standard PCI properties to define the mapping of the
36 PCI interface to interrupt numbers.
37 - ranges: ranges for the PCI memory regions (I/O space region is not
38 supported by hardware)
39 Please refer to the standard PCI bus binding document for a more
40 detailed explanation
41
42
43 Example:
44 ++++++++
45 pcie0: pcie@a0000000 {
46 #address-cells = <3>;
47 #size-cells = <2>;
48 compatible = "mbvl,gpex40-pcie";
49 reg = <0xa0000000 0x00001000>,
50 <0xb0000000 0x00010000>,
51 <0xff000000 0x00200000>,
52 <0xb0010000 0x00001000>;
53 reg-names = "config_axi_slave",
54 "csr_axi_slave",
55 "gpio_slave",
56 "apb_csr";
57 device_type = "pci";
58 apio-wins = <2>;
59 ppio-wins = <1>;
60 bus-range = <0x00000000 0x000000ff>;
61 interrupt-controller;
62 interrupt-parent = <&gic>;
63 #interrupt-cells = <1>;
64 interrupts = < 0 89 4 >;
65 interrupt-map-mask = <0 0 0 7>;
66 interrupt-map = <0 0 0 0 &pci_express 0>,
67 <0 0 0 1 &pci_express 1>,
68 <0 0 0 2 &pci_express 2>,
69 <0 0 0 3 &pci_express 3>;
70 ranges = < 0x83000000 0 0x00000000 0xa8000000 0 0x8000000>;
71
72 };
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