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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Apr 2022 12:49:19.4337 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 364afa4e-90ae-4603-1b4f-08da2527aefc X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[12.22.5.238];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT030.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR12MB1698 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add support for Tegra234 PCIe controllers. These controllers are based on Synopsys DesignWare core IP. Signed-off-by: Vidya Sagar --- V2: * Addressed review comment from Rob .../bindings/pci/nvidia,tegra194-pcie.txt | 104 +++++++++++++++++- 1 file changed, 101 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt index 8e4f9bfb316d..d6f4ea783b00 100644 --- a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt +++ b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt @@ -10,6 +10,8 @@ Required properties: - power-domains: A phandle to the node that controls power to the respective PCIe controller and a specifier name for the PCIe controller. Following are the specifiers for the different PCIe controllers + Tegra194: + --------- TEGRA194_POWER_DOMAIN_PCIEX8B: C0 TEGRA194_POWER_DOMAIN_PCIEX1A: C1 TEGRA194_POWER_DOMAIN_PCIEX1A: C2 @@ -18,6 +20,21 @@ Required properties: TEGRA194_POWER_DOMAIN_PCIEX8A: C5 these specifiers are defined in "include/dt-bindings/power/tegra194-powergate.h" file. + Tegra234: + --------- + TEGRA234_POWER_DOMAIN_PCIEX4BA: C0 + TEGRA234_POWER_DOMAIN_PCIEX1A : C1 + TEGRA234_POWER_DOMAIN_PCIEX1A : C2 + TEGRA234_POWER_DOMAIN_PCIEX1A : C3 + TEGRA234_POWER_DOMAIN_PCIEX4BB: C4 + TEGRA234_POWER_DOMAIN_PCIEX8A : C5 + TEGRA234_POWER_DOMAIN_PCIEX4A : C6 + TEGRA234_POWER_DOMAIN_PCIEX8B : C7 + TEGRA234_POWER_DOMAIN_PCIEX4CA: C8 + TEGRA234_POWER_DOMAIN_PCIEX4CB: C9 + TEGRA234_POWER_DOMAIN_PCIEX4CC: C10 + these specifiers are defined in + "include/dt-bindings/power/tegra234-powergate.h" file. - reg: A list of physical base address and length pairs for each set of controller registers. Must contain an entry for each entry in the reg-names property. @@ -47,16 +64,33 @@ Required properties: "p2u-N": where N ranges from 0 to one less than the total number of lanes - nvidia,bpmp: Must contain a pair of phandle to BPMP controller node followed by controller-id. Following are the controller ids for each controller. + Tegra194: + --------- 0: C0 1: C1 2: C2 3: C3 4: C4 5: C5 + Tegra194: + --------- + 0 : C0 + 1 : C1 + 2 : C2 + 3 : C3 + 4 : C4 + 5 : C5 + 6 : C6 + 7 : C7 + 8 : C8 + 9 : C9 + 10: C10 - vddio-pex-ctl-supply: Regulator supply for PCIe side band signals RC mode: -- compatible: Tegra19x must contain "nvidia,tegra194-pcie" +- compatible: Must be + - "nvidia,tegra194-pcie" for Tegra194 + - "nvidia,tegra234-pcie" for Tegra234 - device_type: Must be "pci" for RC mode - interrupt-names: Must include the following entries: "msi": The Tegra interrupt that is asserted when an MSI is received @@ -99,7 +133,8 @@ In Tegra194, Only controllers C0, C4 & C5 support EP mode. Optional properties: - pinctrl-names: A list of pinctrl state names. - It is mandatory for C5 controller and optional for other controllers. + It is mandatory for C5 controller in Tegra194 and optional for other + controllers. - "default": Configures PCIe I/O for proper operation. - pinctrl-0: phandle for the 'default' state of pin configuration. It is mandatory for C5 controller and optional for other controllers. @@ -108,7 +143,7 @@ Optional properties: improve performance when a platform is designed in such a way that it satisfies at least one of the following conditions thereby enabling root port to exchange optimum number of FC (Flow Control) credits with - downstream devices + downstream devices. This is applicable for only Tegra194. 1. If C0/C4/C5 run at x1/x2 link widths (irrespective of speed and MPS) 2. If C0/C1/C2/C3/C4/C5 operate at their respective max link widths and a) speed is Gen-2 and MPS is 256B @@ -119,6 +154,9 @@ Optional properties: specified in microseconds - nvidia,aspm-l0s-entrance-latency-us: ASPM L0s entrance latency to be specified in microseconds +- nvidia,enable-srns: This boolean property needs to be present if the + controller is configured to operate in SRNS (Separate Reference Clocks with + No Spread-Spectrum Clocking). This is applicable only for Tegra234. RC mode: - vpcie3v3-supply: A phandle to the regulator node that supplies 3.3V to the slot @@ -127,6 +165,9 @@ RC mode: - vpcie12v-supply: A phandle to the regulator node that supplies 12V to the slot if the platform has one such slot. (Ex:- x16 slot owned by C5 controller in p2972-0000 platform). +- nvidia,enable-ext-refclk: This boolean property needs to be present if the + controller is configured to use the reference clocking coming in from an + external clock source instead of using the internal clock source. EP mode: - nvidia,refclk-select-gpios: Must contain a phandle to a GPIO controller @@ -243,3 +284,60 @@ Tegra194 EP mode: phy-names = "p2u-0", "p2u-1", "p2u-2", "p2u-3", "p2u-4", "p2u-5", "p2u-6", "p2u-7"; }; + +Tegra234 RP mode: +----------------- + + pcie@141a0000 { + compatible = "nvidia,tegra234-pcie"; + power-domains = <&bpmp TEGRA234_POWER_DOMAIN_PCIEX8A>; + reg = <0x00 0x141a0000 0x0 0x00020000>, /* appl registers (128K) */ + <0x00 0x3a000000 0x0 0x00040000>, /* configuration space (256K) */ + <0x00 0x3a040000 0x0 0x00040000>, /* iATU_DMA reg space (256K) */ + <0x00 0x3a080000 0x0 0x00040000>; /* DBI reg space (256K) */ + reg-names = "appl", "config", "atu_dma", "dbi"; + + #address-cells = <3>; + #size-cells = <2>; + device_type = "pci"; + num-lanes = <8>; + num-viewport = <8>; + linux,pci-domain = <5>; + + clocks = <&bpmp TEGRA234_CLK_PEX1_C5_CORE>; + clock-names = "core"; + + resets = <&bpmp TEGRA234_RESET_PEX1_CORE_5_APB>, + <&bpmp TEGRA234_RESET_PEX1_CORE_5>; + reset-names = "apb", "core"; + + interrupts = , /* controller interrupt */ + ; /* MSI interrupt */ + interrupt-names = "intr", "msi"; + + #interrupt-cells = <1>; + interrupt-map-mask = <0 0 0 0>; + interrupt-map = <0 0 0 0 &gic GIC_SPI 53 IRQ_TYPE_LEVEL_HIGH>; + + nvidia,bpmp = <&bpmp 5>; + + nvidia,aspm-cmrt-us = <60>; + nvidia,aspm-pwr-on-t-us = <20>; + nvidia,aspm-l0s-entrance-latency-us = <3>; + + bus-range = <0x0 0xff>; + + ranges = <0x43000000 0x27 0x40000000 0x27 0x40000000 0x3 0xe8000000>, /* prefetchable memory (16000 MB) */ + <0x02000000 0x0 0x40000000 0x2b 0x28000000 0x0 0x08000000>, /* non-prefetchable memory (128 MB) */ + <0x01000000 0x0 0x3a100000 0x00 0x3a100000 0x0 0x00100000>; /* downstream I/O (1 MB) */ + + interconnects = <&mc TEGRA234_MEMORY_CLIENT_PCIE5R &emc>, + <&mc TEGRA234_MEMORY_CLIENT_PCIE5W &emc>; + interconnect-names = "dma-mem", "write"; + + phys = <&p2u_nvhs_0>, <&p2u_nvhs_1>, <&p2u_nvhs_2>, + <&p2u_nvhs_3>, <&p2u_nvhs_4>, <&p2u_nvhs_5>, + <&p2u_nvhs_6>, <&p2u_nvhs_7>; + phy-names = "p2u-0", "p2u-1", "p2u-2", "p2u-3", "p2u-4", + "p2u-5", "p2u-6", "p2u-7"; + };