1 NVIDIA Tegra PCIe controller (Synopsys DesignWare Core based)
3 This PCIe host controller is based on the Synopsis Designware PCIe IP
4 and thus inherits all the common properties defined in designware-pcie.txt.
7 - compatible: For Tegra19x, must contain "nvidia,tegra194-pcie".
8 - device_type: Must be "pci"
9 - power-domains: A phandle to the node that controls power to the respective
10 PCIe controller and a specifier name for the PCIe controller. Following are
11 the specifiers for the different PCIe controllers
12 TEGRA194_POWER_DOMAIN_PCIEX8B: C0
13 TEGRA194_POWER_DOMAIN_PCIEX1A: C1
14 TEGRA194_POWER_DOMAIN_PCIEX1A: C2
15 TEGRA194_POWER_DOMAIN_PCIEX1A: C3
16 TEGRA194_POWER_DOMAIN_PCIEX4A: C4
17 TEGRA194_POWER_DOMAIN_PCIEX8A: C5
18 these specifiers are defined in
19 "include/dt-bindings/power/tegra194-powergate.h" file.
20 - reg: A list of physical base address and length pairs for each set of
21 controller registers. Must contain an entry for each entry in the reg-names
23 - reg-names: Must include the following entries:
24 "appl": Controller's application logic registers
25 "config": As per the definition in designware-pcie.txt
26 "atu_dma": iATU and DMA registers. This is where the iATU (internal Address
27 Translation Unit) registers of the PCIe core are made available
29 "dbi": The aperture where root port's own configuration registers are
31 - interrupts: A list of interrupt outputs of the controller. Must contain an
32 entry for each entry in the interrupt-names property.
33 - interrupt-names: Must include the following entries:
34 "intr": The Tegra interrupt that is asserted for controller interrupts
35 "msi": The Tegra interrupt that is asserted when an MSI is received
36 - bus-range: Range of bus numbers associated with this controller
37 - #address-cells: Address representation for root ports (must be 3)
38 - cell 0 specifies the bus and device numbers of the root port:
40 [15:11]: device number
41 - cell 1 denotes the upper 32 address bits and should be 0
42 - cell 2 contains the lower 32 address bits and is used to translate to the
44 - #size-cells: Size representation for root ports (must be 2)
45 - ranges: Describes the translation of addresses for root ports and standard
46 PCI regions. The entries must be 7 cells each, where the first three cells
47 correspond to the address as described for the #address-cells property
48 above, the fourth and fifth cells are for the physical CPU address to
49 translate to and the sixth and seventh cells are as described for the
50 #size-cells property above.
51 - Entries setup the mapping for the standard I/O, memory and
52 prefetchable PCI regions. The first cell determines the type of region
54 - 0x81000000: I/O memory region
55 - 0x82000000: non-prefetchable memory region
56 - 0xc2000000: prefetchable memory region
57 Please refer to the standard PCI bus binding document for a more detailed
59 - #interrupt-cells: Size representation for interrupts (must be 1)
60 - interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties
61 Please refer to the standard PCI bus binding document for a more detailed
63 - clocks: Must contain an entry for each entry in clock-names.
64 See ../clocks/clock-bindings.txt for details.
65 - clock-names: Must include the following entries:
67 - resets: Must contain an entry for each entry in reset-names.
68 See ../reset/reset.txt for details.
69 - reset-names: Must include the following entries:
72 - phys: Must contain a phandle to P2U PHY for each entry in phy-names.
73 - phy-names: Must include an entry for each active lane.
74 "p2u-N": where N ranges from 0 to one less than the total number of lanes
75 - nvidia,bpmp: Must contain a pair of phandle to BPMP controller node followed
76 by controller-id. Following are the controller ids for each controller.
83 - vddio-pex-ctl-supply: Regulator supply for PCIe side band signals
86 - pinctrl-names: A list of pinctrl state names.
87 It is mandatory for C5 controller and optional for other controllers.
88 - "default": Configures PCIe I/O for proper operation.
89 - pinctrl-0: phandle for the 'default' state of pin configuration.
90 It is mandatory for C5 controller and optional for other controllers.
91 - supports-clkreq: Refer to Documentation/devicetree/bindings/pci/pci.txt
92 - nvidia,update-fc-fixup: This is a boolean property and needs to be present to
93 improve performance when a platform is designed in such a way that it
94 satisfies at least one of the following conditions thereby enabling root
95 port to exchange optimum number of FC (Flow Control) credits with
97 1. If C0/C4/C5 run at x1/x2 link widths (irrespective of speed and MPS)
98 2. If C0/C1/C2/C3/C4/C5 operate at their respective max link widths and
99 a) speed is Gen-2 and MPS is 256B
100 b) speed is >= Gen-3 with any MPS
101 - nvidia,aspm-cmrt-us: Common Mode Restore Time for proper operation of ASPM
102 to be specified in microseconds
103 - nvidia,aspm-pwr-on-t-us: Power On time for proper operation of ASPM to be
104 specified in microseconds
105 - nvidia,aspm-l0s-entrance-latency-us: ASPM L0s entrance latency to be
106 specified in microseconds
107 - vpcie3v3-supply: A phandle to the regulator node that supplies 3.3V to the slot
108 if the platform has one such slot. (Ex:- x16 slot owned by C5 controller
109 in p2972-0000 platform).
110 - vpcie12v-supply: A phandle to the regulator node that supplies 12V to the slot
111 if the platform has one such slot. (Ex:- x16 slot owned by C5 controller
112 in p2972-0000 platform).
121 compatible = "nvidia,tegra194-pcie", "snps,dw-pcie";
122 power-domains = <&bpmp TEGRA194_POWER_DOMAIN_PCIEX8B>;
123 reg = <0x00 0x14180000 0x0 0x00020000 /* appl registers (128K) */
124 0x00 0x38000000 0x0 0x00040000 /* configuration space (256K) */
125 0x00 0x38040000 0x0 0x00040000>; /* iATU_DMA reg space (256K) */
126 reg-names = "appl", "config", "atu_dma";
128 #address-cells = <3>;
132 linux,pci-domain = <0>;
134 pinctrl-names = "default";
135 pinctrl-0 = <&pex_rst_c5_out_state>, <&clkreq_c5_bi_dir_state>;
137 clocks = <&bpmp TEGRA194_CLK_PEX0_CORE_0>;
138 clock-names = "core";
140 resets = <&bpmp TEGRA194_RESET_PEX0_CORE_0_APB>,
141 <&bpmp TEGRA194_RESET_PEX0_CORE_0>;
142 reset-names = "apb", "core";
144 interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>, /* controller interrupt */
145 <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>; /* MSI interrupt */
146 interrupt-names = "intr", "msi";
148 #interrupt-cells = <1>;
149 interrupt-map-mask = <0 0 0 0>;
150 interrupt-map = <0 0 0 0 &gic GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>;
152 nvidia,bpmp = <&bpmp 0>;
155 nvidia,aspm-cmrt-us = <60>;
156 nvidia,aspm-pwr-on-t-us = <20>;
157 nvidia,aspm-l0s-entrance-latency-us = <3>;
159 bus-range = <0x0 0xff>;
160 ranges = <0x81000000 0x0 0x38100000 0x0 0x38100000 0x0 0x00100000 /* downstream I/O (1MB) */
161 0x82000000 0x0 0x38200000 0x0 0x38200000 0x0 0x01E00000 /* non-prefetchable memory (30MB) */
162 0xc2000000 0x18 0x00000000 0x18 0x00000000 0x4 0x00000000>; /* prefetchable memory (16GB) */
164 vddio-pex-ctl-supply = <&vdd_1v8ao>;
165 vpcie3v3-supply = <&vdd_3v3_pcie>;
166 vpcie12v-supply = <&vdd_12v_pcie>;
168 phys = <&p2u_hsio_2>, <&p2u_hsio_3>, <&p2u_hsio_4>,
170 phy-names = "p2u-0", "p2u-1", "p2u-2", "p2u-3";