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Tue, 26 Mar 2019 15:15:03 +0000 Received: from vidyas-desktop.nvidia.com (Not Verified[10.24.37.38]) by hqnvemgw02.nvidia.com with Trustwave SEG (v7, 5, 8, 10121) id ; Tue, 26 Mar 2019 08:15:03 -0700 From: Vidya Sagar To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH 05/10] dt-bindings: PCI: tegra: Add device tree support for T194 Date: Tue, 26 Mar 2019 20:43:22 +0530 Message-ID: <1553613207-3988-6-git-send-email-vidyas@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1553613207-3988-1-git-send-email-vidyas@nvidia.com> References: <1553613207-3988-1-git-send-email-vidyas@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1553613303; bh=khnhPELXQ9RkqIub3MEX+d+pWNgkpIHJWbRfE4BdD4A=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=C6ERGSt9953h16j+Qv46BgNidCZTBicZzKH+d/bfk7ouNeqCbXWSVt6Q46ptYIoEN uW7WkOiGejNTwDzaA+EIaCPOizx1Y/ioOuImTdASfW8wa8tWtnah3hLLOgZ9VdcETJ b5gvD0CBxNqHPh+hnu+8xa0VhMkWB7KqNdvUI1cNdJjBXtCtDKeqT735pGmlChDoeA t2O47v1jv9lqQdp+C8ZqwYN8H4PR2Kci9W6O7xHecr52V5e5XKHaPFvI/vXnM5aglU QgUOKJYweIAxkFzqrCVPA5fm717UziUPXTdUTCSmt3uvmwIrzdoke/jzBnp3T9zAK5 NFQLnnW6W+YOw== X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190326_081506_194614_364C597C X-CRM114-Status: GOOD ( 16.91 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, mmaddireddy@nvidia.com, kthota@nvidia.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add support for Tegra194 PCIe controllers. These controllers are based on Synopsys DesignWare core IP. Signed-off-by: Vidya Sagar --- .../bindings/pci/nvidia,tegra194-pcie.txt | 209 +++++++++++++++++++++ .../devicetree/bindings/phy/phy-tegra194-p2u.txt | 34 ++++ 2 files changed, 243 insertions(+) create mode 100644 Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt create mode 100644 Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt new file mode 100644 index 000000000000..31527283a0cd --- /dev/null +++ b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt @@ -0,0 +1,209 @@ +NVIDIA Tegra PCIe controller (Synopsys DesignWare Core based) + +This PCIe host controller is based on the Synopsis Designware PCIe IP +and thus inherits all the common properties defined in designware-pcie.txt. + +Required properties: +- compatible: For Tegra19x, must contain "nvidia,tegra194-pcie". +- device_type: Must be "pci" +- reg: A list of physical base address and length for each set of controller + registers. Must contain an entry for each entry in the reg-names property. +- reg-names: Must include the following entries: + "appl": Controller's application logic registers + "window1": This is the aperture of controller available under 4GB boundary + (i.e. within 32-bit space). This aperture is typically used for + accessing config space of root port itself and also the connected + endpoints (by appropriately programming internal Address + Translation Unit's (iATU) out bound region) and also to map + prefetchable/non-prefetchable BARs. + "config": As per the definition in designware-pcie.txt + "atu_dma": iATU and DMA register. This is where the iATU (internal Address + Translation Unit) registers of the PCIe core are made available + fow SW access. + "dbi": The aperture where root port's own configuration registers are + available + "window2": This is the larger (compared to window1) aperture available above + 4GB boundary (i.e. in 64-bit space). This is typically used for + mapping prefetchable/non-prefetchable BARs of endpoints +- interrupts: A list of interrupt outputs of the controller. Must contain an + entry for each entry in the interrupt-names property. +- interrupt-names: Must include the following entries: + "intr": The Tegra interrupt that is asserted for controller interrupts + "msi": The Tegra interrupt that is asserted when an MSI is received +- bus-range: Range of bus numbers associated with this controller +- #address-cells: Address representation for root ports (must be 3) + - cell 0 specifies the bus and device numbers of the root port: + [23:16]: bus number + [15:11]: device number + - cell 1 denotes the upper 32 address bits and should be 0 + - cell 2 contains the lower 32 address bits and is used to translate to the + CPU address space +- #size-cells: Size representation for root ports (must be 2) +- ranges: Describes the translation of addresses for root ports and standard + PCI regions. The entries must be 7 cells each, where the first three cells + correspond to the address as described for the #address-cells property + above, the fourth and fifth cells are for the physical CPU address to + translate to and the sixth and seventh cells are as described for the + #size-cells property above. + - Entries setup the mapping for the standard I/O, memory and + prefetchable PCI regions. The first cell determines the type of region + that is setup: + - 0x81000000: I/O memory region + - 0x82000000: non-prefetchable memory region + - 0xc2000000: prefetchable memory region + Please refer to the standard PCI bus binding document for a more detailed + explanation. +- #interrupt-cells: Size representation for interrupts (must be 1) +- interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties + Please refer to the standard PCI bus binding document for a more detailed + explanation. +- clocks: Must contain an entry for each entry in clock-names. + See ../clocks/clock-bindings.txt for details. +- clock-names: Must include the following entries: + - core_clk +- resets: Must contain an entry for each entry in reset-names. + See ../reset/reset.txt for details. +- reset-names: Must include the following entries: + - core_apb_rst + - core_rst +- phys: Must contain a phandle to P2U PHY for each entry in phy-names. +- phy-names: Must include an entry for each active lane. + "pcie-p2u-N": where N ranges from 0 to one less than the total number of lanes +- Controller dependent register offsets + - nvidia,event-cntr-ctrl: EVENT_COUNTER_CONTROL reg offset + 0x168 - FPGA + 0x1a8 - C1, C2 and C3 + 0x1c4 - C4 + 0x1d8 - C0 and C5 + - nvidia,event-cntr-data: EVENT_COUNTER_DATA reg offset + 0x16c - FPGA + 0x1ac - C1, C2 and C3 + 0x1c8 - C4 + 0x1dc - C0 and C5 +- nvidia,controller-id : Controller specific ID + 0x0 - C0 + 0x1 - C1 + 0x2 - C2 + 0x3 - C3 + 0x4 - C4 + 0x5 - C5 +- vddio-pex-ctl-supply: Regulator supply for PCIe side band signals + +Optional properties: +- nvidia,max-speed: limits controllers max speed to this value. + 1 - Gen-1 (2.5 GT/s) + 2 - Gen-2 (5 GT/s) + 3 - Gen-3 (8 GT/s) + 4 - Gen-4 (16 GT/s) +- nvidia,init-speed: limits controllers init speed to this value. + 1 - Gen-1 (2. 5 GT/s) + 2 - Gen-2 (5 GT/s) + 3 - Gen-3 (8 GT/s) + 4 - Gen-4 (16 GT/s) +- nvidia,disable-aspm-states : controls advertisement of ASPM states + bit-0 to '1' : disables advertisement of ASPM-L0s + bit-1 to '1' : disables advertisement of ASPM-L1. This also disables + advertisement of ASPM-L1.1 and ASPM-L1.2 + bit-2 to '1' : disables advertisement of ASPM-L1.1 + bit-3 to '1' : disables advertisement of ASPM-L1.2 +- nvidia,disable-clock-request : gives a hint to driver that there is no + CLKREQ signal routing on board +- nvidia,update-fc-fixup : needs it to improve perf when a platform is designed + in such a way that it satisfies at least one of the following conditions + 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 + b) speed is >= Gen-3 with any MPS +- nvidia,cdm-check : Enables CDM checking. For more information, refer Synopsis + DesignWare Cores PCI Express Controller Databook r4.90a Chapter S.4 +- nvidia,enable-power-down : Enables power down of respective controller and + corresponding PLLs if they are not shared by any other entity +- "nvidia,pex-wake" : Add PEX_WAKE gpio number to provide wake support. +- "nvidia,plat-gpios" : Add gpio number that needs to be configured before + system goes for enumeration. There could be platforms where enabling 3.3V and + 12V power supplies are done through GPIOs, in which case, list of all such + GPIOs can be specified through this property. +- "nvidia,aspm-cmrt" : Common Mode Restore time for proper operation of ASPM to + be specified in microseconds +- "nvidia,aspm-pwr-on-t" : Power On time for proper operation of ASPM to be + specified in microseconds +- "nvidia,aspm-l0s-entrance-latency" : ASPM L0s entrance latency to be specified + in microseconds + +Examples: +========= + +Tegra194: +-------- + +SoC DTSI: + + pcie@14180000 { + compatible = "nvidia,tegra194-pcie", "snps,dw-pcie"; + power-domains = <&bpmp TEGRA194_POWER_DOMAIN_PCIEX8B>; + reg = <0x00 0x14180000 0x0 0x00020000 /* appl registers (128K) */ + 0x00 0x38000000 0x0 0x00040000 /* configuration space (256K) */ + 0x00 0x38040000 0x0 0x00040000>; /* iATU_DMA reg space (256K) */ + reg-names = "appl", "config", "atu_dma"; + + status = "disabled"; + + #address-cells = <3>; + #size-cells = <2>; + device_type = "pci"; + num-lanes = <8>; + linux,pci-domain = <0>; + + clocks = <&bpmp TEGRA194_CLK_PEX0_CORE_0>; + clock-names = "core_clk"; + + resets = <&bpmp TEGRA194_RESET_PEX0_CORE_0_APB>, + <&bpmp TEGRA194_RESET_PEX0_CORE_0>; + reset-names = "core_apb_rst", "core_rst"; + + 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 0 72 0x04>; + + nvidia,bpmp = <&bpmp>; + + nvidia,max-speed = <4>; + nvidia,disable-aspm-states = <0xf>; + nvidia,controller-id = <&bpmp 0x0>; + nvidia,aux-clk-freq = <0x13>; + nvidia,preset-init = <0x5>; + nvidia,aspm-cmrt = <0x3C>; + nvidia,aspm-pwr-on-t = <0x14>; + nvidia,aspm-l0s-entrance-latency = <0x3>; + + bus-range = <0x0 0xff>; + ranges = <0x81000000 0x0 0x38100000 0x0 0x38100000 0x0 0x00100000 /* downstream I/O (1MB) */ + 0x82000000 0x0 0x38200000 0x0 0x38200000 0x0 0x01E00000 /* non-prefetchable memory (30MB) */ + 0xc2000000 0x18 0x00000000 0x18 0x00000000 0x4 0x00000000>; /* prefetchable memory (16GB) */ + + nvidia,cfg-link-cap-l1sub = <0x1c4>; + nvidia,cap-pl16g-status = <0x174>; + nvidia,cap-pl16g-cap-off = <0x188>; + nvidia,event-cntr-ctrl = <0x1d8>; + nvidia,event-cntr-data = <0x1dc>; + nvidia,dl-feature-cap = <0x30c>; + }; + +Board DTS: + + pcie@14180000 { + status = "okay"; + + vddio-pex-ctl-supply = <&vdd_1v8ao>; + + phys = <&p2u_2>, + <&p2u_3>, + <&p2u_4>, + <&p2u_5>; + phy-names = "pcie-p2u-0", "pcie-p2u-1", "pcie-p2u-2", + "pcie-p2u-3"; + }; diff --git a/Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt b/Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt new file mode 100644 index 000000000000..cc0de8e8e8db --- /dev/null +++ b/Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt @@ -0,0 +1,34 @@ +NVIDIA Tegra194 P2U binding + +Tegra194 has two PHY bricks namely HSIO (High Speed IO) and NVHS (NVIDIA High +Speed) each interfacing with 12 and 8 P2U instances respectively. +A P2U instance is a glue logic between Synopsys DesignWare Core PCIe IP's PIPE +interface and PHY of HSIO/NVHS bricks. Each P2U instance represents one PCIe +lane. + +Required properties: +- compatible: For Tegra19x, must contain "nvidia,tegra194-phy-p2u". +- reg: Should be the physical address space and length of respective each P2U + instance. +- reg-names: Must include the entry "base". + +Required properties for PHY port node: +- #phy-cells: Defined by generic PHY bindings. Must be 0. + +Refer to phy/phy-bindings.txt for the generic PHY binding properties. + +Example: + +hsio-p2u { + compatible = "simple-bus"; + #address-cells = <2>; + #size-cells = <2>; + ranges; + p2u_0: p2u@03e10000 { + compatible = "nvidia,tegra194-phy-p2u"; + reg = <0x0 0x03e10000 0x0 0x00010000>; + reg-names = "base"; + + #phy-cells = <0>; + }; +}