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-rw-r--r--Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt124
-rw-r--r--Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml68
-rw-r--r--Documentation/devicetree/bindings/dma/xilinx/zynqmp_dma.txt26
3 files changed, 218 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt b/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt
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+++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt
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+Xilinx AXI VDMA engine, it does transfers between memory and video devices.
+It can be configured to have one channel or two channels. If configured
+as two channels, one is to transmit to the video device and another is
+to receive from the video device.
+
+Xilinx AXI DMA engine, it does transfers between memory and AXI4 stream
+target devices. It can be configured to have one channel or two channels.
+If configured as two channels, one is to transmit to the device and another
+is to receive from the device.
+
+Xilinx AXI CDMA engine, it does transfers between memory-mapped source
+address and a memory-mapped destination address.
+
+Xilinx AXI MCDMA engine, it does transfer between memory and AXI4 stream
+target devices. It can be configured to have up to 16 independent transmit
+and receive channels.
+
+Required properties:
+- compatible: Should be one of-
+ "xlnx,axi-vdma-1.00.a"
+ "xlnx,axi-dma-1.00.a"
+ "xlnx,axi-cdma-1.00.a"
+ "xlnx,axi-mcdma-1.00.a"
+- #dma-cells: Should be <1>, see "dmas" property below
+- reg: Should contain VDMA registers location and length.
+- xlnx,addrwidth: Should be the vdma addressing size in bits(ex: 32 bits).
+- dma-ranges: Should be as the following <dma_addr cpu_addr max_len>.
+- dma-channel child node: Should have at least one channel and can have up to
+ two channels per device. This node specifies the properties of each
+ DMA channel (see child node properties below).
+- clocks: Input clock specifier. Refer to common clock bindings.
+- clock-names: List of input clocks
+ For VDMA:
+ Required elements: "s_axi_lite_aclk"
+ Optional elements: "m_axi_mm2s_aclk" "m_axi_s2mm_aclk",
+ "m_axis_mm2s_aclk", "s_axis_s2mm_aclk"
+ For CDMA:
+ Required elements: "s_axi_lite_aclk", "m_axi_aclk"
+ For AXIDMA and MCDMA:
+ Required elements: "s_axi_lite_aclk"
+ Optional elements: "m_axi_mm2s_aclk", "m_axi_s2mm_aclk",
+ "m_axi_sg_aclk"
+
+Required properties for VDMA:
+- xlnx,num-fstores: Should be the number of framebuffers as configured in h/w.
+
+Optional properties for AXI DMA and MCDMA:
+- xlnx,sg-length-width: Should be set to the width in bits of the length
+ register as configured in h/w. Takes values {8...26}. If the property
+ is missing or invalid then the default value 23 is used. This is the
+ maximum value that is supported by all IP versions.
+Optional properties for VDMA:
+- xlnx,flush-fsync: Tells which channel to Flush on Frame sync.
+ It takes following values:
+ {1}, flush both channels
+ {2}, flush mm2s channel
+ {3}, flush s2mm channel
+
+Required child node properties:
+- compatible:
+ For VDMA: It should be either "xlnx,axi-vdma-mm2s-channel" or
+ "xlnx,axi-vdma-s2mm-channel".
+ For CDMA: It should be "xlnx,axi-cdma-channel".
+ For AXIDMA and MCDMA: It should be either "xlnx,axi-dma-mm2s-channel"
+ or "xlnx,axi-dma-s2mm-channel".
+- interrupts: Should contain per channel VDMA interrupts.
+- xlnx,datawidth: Should contain the stream data width, take values
+ {32,64...1024}.
+
+Optional child node properties:
+- xlnx,include-dre: Tells hardware is configured for Data
+ Realignment Engine.
+Optional child node properties for VDMA:
+- xlnx,genlock-mode: Tells Genlock synchronization is
+ enabled/disabled in hardware.
+- xlnx,enable-vert-flip: Tells vertical flip is
+ enabled/disabled in hardware(S2MM path).
+Optional child node properties for MCDMA:
+- dma-channels: Number of dma channels in child node.
+
+Example:
+++++++++
+
+axi_vdma_0: axivdma@40030000 {
+ compatible = "xlnx,axi-vdma-1.00.a";
+ #dma_cells = <1>;
+ reg = < 0x40030000 0x10000 >;
+ dma-ranges = <0x00000000 0x00000000 0x40000000>;
+ xlnx,num-fstores = <0x8>;
+ xlnx,flush-fsync = <0x1>;
+ xlnx,addrwidth = <0x20>;
+ clocks = <&clk 0>, <&clk 1>, <&clk 2>, <&clk 3>, <&clk 4>;
+ clock-names = "s_axi_lite_aclk", "m_axi_mm2s_aclk", "m_axi_s2mm_aclk",
+ "m_axis_mm2s_aclk", "s_axis_s2mm_aclk";
+ dma-channel@40030000 {
+ compatible = "xlnx,axi-vdma-mm2s-channel";
+ interrupts = < 0 54 4 >;
+ xlnx,datawidth = <0x40>;
+ } ;
+ dma-channel@40030030 {
+ compatible = "xlnx,axi-vdma-s2mm-channel";
+ interrupts = < 0 53 4 >;
+ xlnx,datawidth = <0x40>;
+ } ;
+} ;
+
+
+* DMA client
+
+Required properties:
+- dmas: a list of <[Video DMA device phandle] [Channel ID]> pairs,
+ where Channel ID is '0' for write/tx and '1' for read/rx
+ channel.
+- dma-names: a list of DMA channel names, one per "dmas" entry
+
+Example:
+++++++++
+
+vdmatest_0: vdmatest@0 {
+ compatible ="xlnx,axi-vdma-test-1.00.a";
+ dmas = <&axi_vdma_0 0
+ &axi_vdma_0 1>;
+ dma-names = "vdma0", "vdma1";
+} ;
diff --git a/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml b/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml
new file mode 100644
index 000000000..2a595b18f
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/xilinx/xlnx,zynqmp-dpdma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Xilinx ZynqMP DisplayPort DMA Controller Device Tree Bindings
+
+description: |
+ These bindings describe the DMA engine included in the Xilinx ZynqMP
+ DisplayPort Subsystem. The DMA engine supports up to 6 DMA channels (3
+ channels for a video stream, 1 channel for a graphics stream, and 2 channels
+ for an audio stream).
+
+maintainers:
+ - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+
+allOf:
+ - $ref: "../dma-controller.yaml#"
+
+properties:
+ "#dma-cells":
+ const: 1
+ description: |
+ The cell is the DMA channel ID (see dt-bindings/dma/xlnx-zynqmp-dpdma.h
+ for a list of channel IDs).
+
+ compatible:
+ const: xlnx,zynqmp-dpdma
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ description: The AXI clock
+ maxItems: 1
+
+ clock-names:
+ const: axi_clk
+
+required:
+ - "#dma-cells"
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+ - clock-names
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ dma: dma-controller@fd4c0000 {
+ compatible = "xlnx,zynqmp-dpdma";
+ reg = <0xfd4c0000 0x1000>;
+ interrupts = <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-parent = <&gic>;
+ clocks = <&dpdma_clk>;
+ clock-names = "axi_clk";
+ #dma-cells = <1>;
+ };
+
+...
diff --git a/Documentation/devicetree/bindings/dma/xilinx/zynqmp_dma.txt b/Documentation/devicetree/bindings/dma/xilinx/zynqmp_dma.txt
new file mode 100644
index 000000000..07a5a7aa9
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+++ b/Documentation/devicetree/bindings/dma/xilinx/zynqmp_dma.txt
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+Xilinx ZynqMP DMA engine, it does support memory to memory transfers,
+memory to device and device to memory transfers. It also has flow
+control and rate control support for slave/peripheral dma access.
+
+Required properties:
+- compatible : Should be "xlnx,zynqmp-dma-1.0"
+- reg : Memory map for gdma/adma module access.
+- interrupts : Should contain DMA channel interrupt.
+- xlnx,bus-width : Axi buswidth in bits. Should contain 128 or 64
+- clock-names : List of input clocks "clk_main", "clk_apb"
+ (see clock bindings for details)
+
+Optional properties:
+- dma-coherent : Present if dma operations are coherent.
+
+Example:
+++++++++
+fpd_dma_chan1: dma@fd500000 {
+ compatible = "xlnx,zynqmp-dma-1.0";
+ reg = <0x0 0xFD500000 0x1000>;
+ interrupt-parent = <&gic>;
+ interrupts = <0 117 4>;
+ clock-names = "clk_main", "clk_apb";
+ xlnx,bus-width = <128>;
+ dma-coherent;
+};