[RFC PATCH v2 02/11] powerpc: gamecube: device tree
Albert Herranz
albert_herranz at yahoo.es
Sun Nov 29 07:43:48 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>
---
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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