powerpc: gamecube: device tree
Add a device tree source file for the Nintendo GameCube video game console. Signed-off-by: Albert Herranz <albert_herranz@yahoo.es> Acked-by: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>hifive-unleashed-5.1
Albert Herranz
Grant Likely
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26054c9541
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Nintendo GameCube device tree
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=============================
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1) The "flipper" node
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This node represents the multi-function "Flipper" chip, which packages
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many of the devices found in the Nintendo GameCube.
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Required properties:
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- compatible : Should be "nintendo,flipper"
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1.a) The Video Interface (VI) node
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Represents the interface between the graphics processor and a external
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video encoder.
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Required properties:
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- compatible : should be "nintendo,flipper-vi"
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- reg : should contain the VI registers location and length
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- interrupts : should contain the VI interrupt
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1.b) The Processor Interface (PI) node
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Represents the data and control interface between the main processor
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and graphics and audio processor.
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Required properties:
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- compatible : should be "nintendo,flipper-pi"
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- reg : should contain the PI registers location and length
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1.b.i) The "Flipper" interrupt controller node
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Represents the interrupt controller within the "Flipper" chip.
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The node for the "Flipper" interrupt controller must be placed under
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the PI node.
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Required properties:
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- compatible : should be "nintendo,flipper-pic"
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1.c) The Digital Signal Procesor (DSP) node
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Represents the digital signal processor interface, designed to offload
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audio related tasks.
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Required properties:
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- compatible : should be "nintendo,flipper-dsp"
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- reg : should contain the DSP registers location and length
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- interrupts : should contain the DSP interrupt
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1.c.i) The Auxiliary RAM (ARAM) node
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Represents the non cpu-addressable ram designed mainly to store audio
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related information.
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The ARAM node must be placed under the DSP node.
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Required properties:
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- compatible : should be "nintendo,flipper-aram"
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- reg : should contain the ARAM start (zero-based) and length
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1.d) The Disk Interface (DI) node
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Represents the interface used to communicate with mass storage devices.
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Required properties:
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- compatible : should be "nintendo,flipper-di"
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- reg : should contain the DI registers location and length
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- interrupts : should contain the DI interrupt
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1.e) The Audio Interface (AI) node
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Represents the interface to the external 16-bit stereo digital-to-analog
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converter.
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Required properties:
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- compatible : should be "nintendo,flipper-ai"
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- reg : should contain the AI registers location and length
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- interrupts : should contain the AI interrupt
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1.f) The Serial Interface (SI) node
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Represents the interface to the four single bit serial interfaces.
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The SI is a proprietary serial interface used normally to control gamepads.
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It's NOT a RS232-type interface.
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Required properties:
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- compatible : should be "nintendo,flipper-si"
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- reg : should contain the SI registers location and length
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- interrupts : should contain the SI interrupt
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1.g) The External Interface (EXI) node
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Represents the multi-channel SPI-like interface.
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Required properties:
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- compatible : should be "nintendo,flipper-exi"
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- reg : should contain the EXI registers location and length
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- interrupts : should contain the EXI interrupt
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@ -0,0 +1,114 @@
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/*
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* arch/powerpc/boot/dts/gamecube.dts
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*
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* Nintendo GameCube platform device tree source
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* Copyright (C) 2007-2009 The GameCube Linux Team
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* Copyright (C) 2007,2008,2009 Albert Herranz
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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*/
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/dts-v1/;
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/ {
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model = "nintendo,gamecube";
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compatible = "nintendo,gamecube";
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#address-cells = <1>;
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#size-cells = <1>;
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chosen {
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bootargs = "root=/dev/gcnsda2 rootwait udbg-immortal";
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};
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memory {
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device_type = "memory";
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reg = <0x00000000 0x01800000>;
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};
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cpus {
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#address-cells = <1>;
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#size-cells = <0>;
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PowerPC,gekko@0 {
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device_type = "cpu";
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reg = <0>;
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clock-frequency = <486000000>; /* 486MHz */
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bus-frequency = <162000000>; /* 162MHz core-to-bus 3x */
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timebase-frequency = <40500000>; /* 162MHz / 4 */
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i-cache-line-size = <32>;
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d-cache-line-size = <32>;
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i-cache-size = <32768>;
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d-cache-size = <32768>;
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};
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};
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/* devices contained int the flipper chipset */
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flipper {
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#address-cells = <1>;
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#size-cells = <1>;
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compatible = "nintendo,flipper";
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ranges = <0x0c000000 0x0c000000 0x00010000>;
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interrupt-parent = <&PIC>;
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video@0c002000 {
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compatible = "nintendo,flipper-vi";
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reg = <0x0c002000 0x100>;
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interrupts = <8>;
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};
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processor-interface@0c003000 {
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compatible = "nintendo,flipper-pi";
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reg = <0x0c003000 0x100>;
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PIC: pic {
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#interrupt-cells = <1>;
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compatible = "nintendo,flipper-pic";
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interrupt-controller;
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};
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};
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dsp@0c005000 {
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#address-cells = <1>;
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#size-cells = <1>;
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compatible = "nintendo,flipper-dsp";
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reg = <0x0c005000 0x200>;
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interrupts = <6>;
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memory@0 {
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compatible = "nintendo,flipper-aram";
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reg = <0 0x1000000>; /* 16MB */
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};
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};
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disk@0c006000 {
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compatible = "nintendo,flipper-di";
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reg = <0x0c006000 0x40>;
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interrupts = <2>;
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};
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audio@0c006c00 {
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compatible = "nintendo,flipper-ai";
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reg = <0x0c006c00 0x20>;
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interrupts = <6>;
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};
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gamepad-controller@0c006400 {
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compatible = "nintendo,flipper-si";
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reg = <0x0c006400 0x100>;
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interrupts = <3>;
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};
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/* External Interface bus */
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exi@0c006800 {
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compatible = "nintendo,flipper-exi";
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reg = <0x0c006800 0x40>;
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virtual-reg = <0x0c006800>;
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interrupts = <4>;
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};
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};
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};
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