1 NVIDIA Tegra PCIe controller (Synopsys DesignWare Core based)
3 This PCIe controller is based on the Synopsis Designware PCIe IP
4 and thus inherits all the common properties defined in designware-pcie.txt.
5 Some of the controller instances are dual mode where in they can work either
6 in root port mode or endpoint mode but one at a time.
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 - clocks: Must contain an entry for each entry in clock-names.
36 See ../clocks/clock-bindings.txt for details.
37 - clock-names: Must include the following entries:
39 - resets: Must contain an entry for each entry in reset-names.
40 See ../reset/reset.txt for details.
41 - reset-names: Must include the following entries:
44 - phys: Must contain a phandle to P2U PHY for each entry in phy-names.
45 - phy-names: Must include an entry for each active lane.
46 "p2u-N": where N ranges from 0 to one less than the total number of lanes
47 - nvidia,bpmp: Must contain a pair of phandle to BPMP controller node followed
48 by controller-id. Following are the controller ids for each controller.
55 - vddio-pex-ctl-supply: Regulator supply for PCIe side band signals
58 - compatible: Tegra19x must contain "nvidia,tegra194-pcie"
59 - device_type: Must be "pci" for RC mode
60 - interrupt-names: Must include the following entries:
61 "msi": The Tegra interrupt that is asserted when an MSI is received
62 - bus-range: Range of bus numbers associated with this controller
63 - #address-cells: Address representation for root ports (must be 3)
64 - cell 0 specifies the bus and device numbers of the root port:
66 [15:11]: device number
67 - cell 1 denotes the upper 32 address bits and should be 0
68 - cell 2 contains the lower 32 address bits and is used to translate to the
70 - #size-cells: Size representation for root ports (must be 2)
71 - ranges: Describes the translation of addresses for root ports and standard
72 PCI regions. The entries must be 7 cells each, where the first three cells
73 correspond to the address as described for the #address-cells property
74 above, the fourth and fifth cells are for the physical CPU address to
75 translate to and the sixth and seventh cells are as described for the
76 #size-cells property above.
77 - Entries setup the mapping for the standard I/O, memory and
78 prefetchable PCI regions. The first cell determines the type of region
80 - 0x81000000: I/O memory region
81 - 0x82000000: non-prefetchable memory region
82 - 0xc2000000: prefetchable memory region
83 Please refer to the standard PCI bus binding document for a more detailed
85 - #interrupt-cells: Size representation for interrupts (must be 1)
86 - interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties
87 Please refer to the standard PCI bus binding document for a more detailed
91 In Tegra194, Only controllers C0, C4 & C5 support EP mode.
92 - compatible: Tegra19x must contain "nvidia,tegra194-pcie-ep"
93 - reg-names: Must include the following entries:
94 "addr_space": Used to map remote RC address space
95 - reset-gpios: Must contain a phandle to a GPIO controller followed by
96 GPIO that is being used as PERST input signal. Please refer to pci.txt
100 - pinctrl-names: A list of pinctrl state names.
101 It is mandatory for C5 controller and optional for other controllers.
102 - "default": Configures PCIe I/O for proper operation.
103 - pinctrl-0: phandle for the 'default' state of pin configuration.
104 It is mandatory for C5 controller and optional for other controllers.
105 - supports-clkreq: Refer to Documentation/devicetree/bindings/pci/pci.txt
106 - nvidia,update-fc-fixup: This is a boolean property and needs to be present to
107 improve performance when a platform is designed in such a way that it
108 satisfies at least one of the following conditions thereby enabling root
109 port to exchange optimum number of FC (Flow Control) credits with
111 1. If C0/C4/C5 run at x1/x2 link widths (irrespective of speed and MPS)
112 2. If C0/C1/C2/C3/C4/C5 operate at their respective max link widths and
113 a) speed is Gen-2 and MPS is 256B
114 b) speed is >= Gen-3 with any MPS
115 - nvidia,aspm-cmrt-us: Common Mode Restore Time for proper operation of ASPM
116 to be specified in microseconds
117 - nvidia,aspm-pwr-on-t-us: Power On time for proper operation of ASPM to be
118 specified in microseconds
119 - nvidia,aspm-l0s-entrance-latency-us: ASPM L0s entrance latency to be
120 specified in microseconds
123 - vpcie3v3-supply: A phandle to the regulator node that supplies 3.3V to the slot
124 if the platform has one such slot. (Ex:- x16 slot owned by C5 controller
125 in p2972-0000 platform).
126 - vpcie12v-supply: A phandle to the regulator node that supplies 12V to the slot
127 if the platform has one such slot. (Ex:- x16 slot owned by C5 controller
128 in p2972-0000 platform).
131 - nvidia,refclk-select-gpios: Must contain a phandle to a GPIO controller
132 followed by GPIO that is being used to enable REFCLK to controller from host
134 NOTE:- On Tegra194's P2972-0000 platform, only C5 controller can be enabled to
135 operate in the endpoint mode because of the way the platform is designed.
144 compatible = "nvidia,tegra194-pcie";
145 power-domains = <&bpmp TEGRA194_POWER_DOMAIN_PCIEX8B>;
146 reg = <0x00 0x14180000 0x0 0x00020000 /* appl registers (128K) */
147 0x00 0x38000000 0x0 0x00040000 /* configuration space (256K) */
148 0x00 0x38040000 0x0 0x00040000>; /* iATU_DMA reg space (256K) */
149 reg-names = "appl", "config", "atu_dma";
151 #address-cells = <3>;
155 linux,pci-domain = <0>;
157 pinctrl-names = "default";
158 pinctrl-0 = <&pex_rst_c5_out_state>, <&clkreq_c5_bi_dir_state>;
160 clocks = <&bpmp TEGRA194_CLK_PEX0_CORE_0>;
161 clock-names = "core";
163 resets = <&bpmp TEGRA194_RESET_PEX0_CORE_0_APB>,
164 <&bpmp TEGRA194_RESET_PEX0_CORE_0>;
165 reset-names = "apb", "core";
167 interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>, /* controller interrupt */
168 <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>; /* MSI interrupt */
169 interrupt-names = "intr", "msi";
171 #interrupt-cells = <1>;
172 interrupt-map-mask = <0 0 0 0>;
173 interrupt-map = <0 0 0 0 &gic GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>;
175 nvidia,bpmp = <&bpmp 0>;
178 nvidia,aspm-cmrt-us = <60>;
179 nvidia,aspm-pwr-on-t-us = <20>;
180 nvidia,aspm-l0s-entrance-latency-us = <3>;
182 bus-range = <0x0 0xff>;
183 ranges = <0x81000000 0x0 0x38100000 0x0 0x38100000 0x0 0x00100000 /* downstream I/O (1MB) */
184 0x82000000 0x0 0x38200000 0x0 0x38200000 0x0 0x01E00000 /* non-prefetchable memory (30MB) */
185 0xc2000000 0x18 0x00000000 0x18 0x00000000 0x4 0x00000000>; /* prefetchable memory (16GB) */
187 vddio-pex-ctl-supply = <&vdd_1v8ao>;
188 vpcie3v3-supply = <&vdd_3v3_pcie>;
189 vpcie12v-supply = <&vdd_12v_pcie>;
191 phys = <&p2u_hsio_2>, <&p2u_hsio_3>, <&p2u_hsio_4>,
193 phy-names = "p2u-0", "p2u-1", "p2u-2", "p2u-3";
200 compatible = "nvidia,tegra194-pcie-ep", "snps,dw-pcie-ep";
201 power-domains = <&bpmp TEGRA194_POWER_DOMAIN_PCIEX8A>;
202 reg = <0x00 0x141a0000 0x0 0x00020000 /* appl registers (128K) */
203 0x00 0x3a040000 0x0 0x00040000 /* iATU_DMA reg space (256K) */
204 0x00 0x3a080000 0x0 0x00040000 /* DBI reg space (256K) */
205 0x1c 0x00000000 0x4 0x00000000>; /* Address Space (16G) */
206 reg-names = "appl", "atu_dma", "dbi", "addr_space";
209 num-ib-windows = <2>;
210 num-ob-windows = <8>;
212 pinctrl-names = "default";
213 pinctrl-0 = <&clkreq_c5_bi_dir_state>;
215 clocks = <&bpmp TEGRA194_CLK_PEX1_CORE_5>;
216 clock-names = "core";
218 resets = <&bpmp TEGRA194_RESET_PEX1_CORE_5_APB>,
219 <&bpmp TEGRA194_RESET_PEX1_CORE_5>;
220 reset-names = "apb", "core";
222 interrupts = <GIC_SPI 53 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
223 interrupt-names = "intr";
225 nvidia,bpmp = <&bpmp 5>;
227 nvidia,aspm-cmrt-us = <60>;
228 nvidia,aspm-pwr-on-t-us = <20>;
229 nvidia,aspm-l0s-entrance-latency-us = <3>;
231 vddio-pex-ctl-supply = <&vdd_1v8ao>;
233 reset-gpios = <&gpio TEGRA194_MAIN_GPIO(GG, 1) GPIO_ACTIVE_LOW>;
235 nvidia,refclk-select-gpios = <&gpio_aon TEGRA194_AON_GPIO(AA, 5)
238 phys = <&p2u_nvhs_0>, <&p2u_nvhs_1>, <&p2u_nvhs_2>,
239 <&p2u_nvhs_3>, <&p2u_nvhs_4>, <&p2u_nvhs_5>,
240 <&p2u_nvhs_6>, <&p2u_nvhs_7>;
242 phy-names = "p2u-0", "p2u-1", "p2u-2", "p2u-3", "p2u-4",
243 "p2u-5", "p2u-6", "p2u-7";