powerpc: gamecube: device tree

Add a device tree source file for the Nintendo GameCube video game console.
Signed-off-by: NAlbert Herranz <albert_herranz@yahoo.es>
Acked-by: NSegher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Documentation/powerpc/dts-bindings/nintendo/gamecube.txt

+
+Nintendo GameCube device tree
+=============================
+
+1) The "flipper" node
+
+  This node represents the multi-function "Flipper" chip, which packages
+  many of the devices found in the Nintendo GameCube.
+
+  Required properties:
+
+   - compatible : Should be "nintendo,flipper"
+
+1.a) The Video Interface (VI) node
+
+  Represents the interface between the graphics processor and a external
+  video encoder.
+
+  Required properties:
+
+   - compatible : should be "nintendo,flipper-vi"
+   - reg : should contain the VI registers location and length
+   - interrupts : should contain the VI interrupt
+
+1.b) The Processor Interface (PI) node
+
+  Represents the data and control interface between the main processor
+  and graphics and audio processor.
+
+  Required properties:
+
+  - compatible : should be "nintendo,flipper-pi"
+  - reg : should contain the PI registers location and length
+
+1.b.i) The "Flipper" interrupt controller node
+
+  Represents the interrupt controller within the "Flipper" chip.
+  The node for the "Flipper" interrupt controller must be placed under
+  the PI node.
+
+  Required properties:
+
+  - compatible : should be "nintendo,flipper-pic"
+
+1.c) The Digital Signal Procesor (DSP) node
+
+  Represents the digital signal processor interface, designed to offload
+  audio related tasks.
+
+  Required properties:
+
+   - compatible : should be "nintendo,flipper-dsp"
+   - reg : should contain the DSP registers location and length
+   - interrupts : should contain the DSP interrupt
+
+1.c.i) The Auxiliary RAM (ARAM) node
+
+  Represents the non cpu-addressable ram designed mainly to store audio
+  related information.
+  The ARAM node must be placed under the DSP node.
+
+  Required properties:
+
+   - compatible : should be "nintendo,flipper-aram"
+   - reg : should contain the ARAM start (zero-based) and length
+
+1.d) The Disk Interface (DI) node
+
+  Represents the interface used to communicate with mass storage devices.
+
+  Required properties:
+
+   - compatible : should be "nintendo,flipper-di"
+   - reg : should contain the DI registers location and length
+   - interrupts : should contain the DI interrupt
+
+1.e) The Audio Interface (AI) node
+
+  Represents the interface to the external 16-bit stereo digital-to-analog
+  converter.
+
+  Required properties:
+
+   - compatible : should be "nintendo,flipper-ai"
+   - reg : should contain the AI registers location and length
+   - interrupts : should contain the AI interrupt
+
+1.f) The Serial Interface (SI) node
+
+  Represents the interface to the four single bit serial interfaces.
+  The SI is a proprietary serial interface used normally to control gamepads.
+  It's NOT a RS232-type interface.
+
+  Required properties:
+
+   - compatible : should be "nintendo,flipper-si"
+   - reg : should contain the SI registers location and length
+   - interrupts : should contain the SI interrupt
+
+1.g) The External Interface (EXI) node
+
+  Represents the multi-channel SPI-like interface.
+
+  Required properties:
+
+   - compatible : should be "nintendo,flipper-exi"
+   - reg : should contain the EXI registers location and length
+   - interrupts : should contain the EXI interrupt
+

arch/powerpc/boot/dts/gamecube.dts

+/*
+ * arch/powerpc/boot/dts/gamecube.dts
+ *
+ * Nintendo GameCube platform device tree source
+ * Copyright (C) 2007-2009 The GameCube Linux Team
+ * Copyright (C) 2007,2008,2009 Albert Herranz
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ */
+
+/dts-v1/;
+
+/ {
+	model = "nintendo,gamecube";
+	compatible = "nintendo,gamecube";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	chosen {
+		bootargs = "root=/dev/gcnsda2 rootwait udbg-immortal";
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x00000000 0x01800000>;
+	};
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		PowerPC,gekko@0 {
+			device_type = "cpu";
+			reg = <0>;
+			clock-frequency = <486000000>; /* 486MHz */
+			bus-frequency = <162000000>; /* 162MHz core-to-bus 3x */
+			timebase-frequency = <40500000>; /* 162MHz / 4 */
+			i-cache-line-size = <32>;
+			d-cache-line-size = <32>;
+			i-cache-size = <32768>;
+			d-cache-size = <32768>;
+		};
+	};
+
+	/* devices contained int the flipper chipset */
+	flipper {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "nintendo,flipper";
+		ranges = <0x0c000000 0x0c000000 0x00010000>;
+		interrupt-parent = <&PIC>;
+
+		video@0c002000 {
+			compatible = "nintendo,flipper-vi";
+			reg = <0x0c002000 0x100>;
+			interrupts = <8>;
+		};
+
+		processor-interface@0c003000 {
+			compatible = "nintendo,flipper-pi";
+			reg = <0x0c003000 0x100>;
+
+			PIC: pic {
+				#interrupt-cells = <1>;
+				compatible = "nintendo,flipper-pic";
+				interrupt-controller;
+			};
+		};
+
+		dsp@0c005000 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "nintendo,flipper-dsp";
+			reg = <0x0c005000 0x200>;
+			interrupts = <6>;
+
+			memory@0 {
+				compatible = "nintendo,flipper-aram";
+				reg = <0 0x1000000>;	/* 16MB */
+			};
+		};
+
+		disk@0c006000 {
+			compatible = "nintendo,flipper-di";
+			reg = <0x0c006000 0x40>;
+			interrupts = <2>;
+		};
+
+		audio@0c006c00 {
+			compatible = "nintendo,flipper-ai";
+			reg = <0x0c006c00 0x20>;
+			interrupts = <6>;
+		};
+
+		gamepad-controller@0c006400 {
+			compatible = "nintendo,flipper-si";
+			reg = <0x0c006400 0x100>;
+			interrupts = <3>;
+		};
+
+		/* External Interface bus */
+		exi@0c006800 {
+			compatible = "nintendo,flipper-exi";
+			reg = <0x0c006800 0x40>;
+			virtual-reg = <0x0c006800>;
+			interrupts = <4>;
+		};
+        };
+};
+