[RFC PATCH v2 02/11] powerpc: gamecube: device tree
Segher Boessenkool
segher at kernel.crashing.org
Wed Dec 2 05:29:40 EST 2009
> Add a device tree source file for the Nintendo GameCube video game
> console.
>
> Signed-off-by: Albert Herranz <albert_herranz at yahoo.es>
Acked-by: Segher Boessenkool <segher at kernel.crashing.org>
> ---
> v1 -> v2
> - Document new bindings in Documentation/powerpc/dts-bindings.
> Suggestion by Grant Likely.
> - Use same form for model property and compatible properties on the
> root
> node. Suggestion by Grant Likely.
> - Drop the model property in the soc node. Suggestion by Grant
> Likely.
> - Move interrupt-parent to the soc node instead of explicitly
> adding it to
> each child node. Suggestion by Grant Likely.
> - Declare all available memory and deal with the fb area in the
> platform
> code. Suggestion by Segher Boessenkool.
> - Transform the "auxram" node into the "dsp" node, create an
> "auxram" node
> within the "dsp" node. Suggestion by Segher Boessenkool.
> - Rename the "soc" node to "flipper". Suggestion by Benjamin
> Herrenschmidt.
> - Remove the usbgecko node from the device tree and autodetect it in
> platform code. Suggestion by Segher Boessenkool.
> - Remove clock-frequency property from the soc node.
> Suggestion by Segher Boessenkool.
> - Create a flipper-processor-interface node and place flipper-pic
> into it.
> Suggestion by Segher Boessenkool.
> - Remove #interrupt-cells from the flipper node.
> Suggestion by Segher Boessenkool.
> - Massive cleanups. Suggestions by Segher Boessenkool.
>
> .../powerpc/dts-bindings/nintendo/gamecube.txt | 109 +++++++++
> ++++++++++
> arch/powerpc/boot/dts/gamecube.dts | 114 +++++++++
> +++++++++++
> 2 files changed, 223 insertions(+), 0 deletions(-)
> create mode 100644 Documentation/powerpc/dts-bindings/nintendo/
> gamecube.txt
> create mode 100644 arch/powerpc/boot/dts/gamecube.dts
>
> diff --git a/Documentation/powerpc/dts-bindings/nintendo/
> gamecube.txt b/Documentation/powerpc/dts-bindings/nintendo/
> gamecube.txt
> new file mode 100644
> index 0000000..b558585
> --- /dev/null
> +++ b/Documentation/powerpc/dts-bindings/nintendo/gamecube.txt
> @@ -0,0 +1,109 @@
> +
> +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
> +
> diff --git a/arch/powerpc/boot/dts/gamecube.dts b/arch/powerpc/boot/
> dts/gamecube.dts
> new file mode 100644
> index 0000000..ef3be0e
> --- /dev/null
> +++ b/arch/powerpc/boot/dts/gamecube.dts
> @@ -0,0 +1,114 @@
> +/*
> + * 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 at 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 at 0c002000 {
> + compatible = "nintendo,flipper-vi";
> + reg = <0x0c002000 0x100>;
> + interrupts = <8>;
> + };
> +
> + processor-interface at 0c003000 {
> + compatible = "nintendo,flipper-pi";
> + reg = <0x0c003000 0x100>;
> +
> + PIC: pic {
> + #interrupt-cells = <1>;
> + compatible = "nintendo,flipper-pic";
> + interrupt-controller;
> + };
> + };
> +
> + dsp at 0c005000 {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + compatible = "nintendo,flipper-dsp";
> + reg = <0x0c005000 0x200>;
> + interrupts = <6>;
> +
> + memory at 0 {
> + compatible = "nintendo,flipper-aram";
> + reg = <0 0x1000000>; /* 16MB */
> + };
> + };
> +
> + disk at 0c006000 {
> + compatible = "nintendo,flipper-di";
> + reg = <0x0c006000 0x40>;
> + interrupts = <2>;
> + };
> +
> + audio at 0c006c00 {
> + compatible = "nintendo,flipper-ai";
> + reg = <0x0c006c00 0x20>;
> + interrupts = <6>;
> + };
> +
> + gamepad-controller at 0c006400 {
> + compatible = "nintendo,flipper-si";
> + reg = <0x0c006400 0x100>;
> + interrupts = <3>;
> + };
> +
> + /* External Interface bus */
> + exi at 0c006800 {
> + compatible = "nintendo,flipper-exi";
> + reg = <0x0c006800 0x40>;
> + virtual-reg = <0x0c006800>;
> + interrupts = <4>;
> + };
> + };
> +};
> +
> --
> 1.6.3.3
>
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