powerpc: gamecube: platform support

Add platform support for the Nintendo GameCube video game console.

Signed-off-by: Albert Herranz <albert_herranz@yahoo.es>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

3 files changed, 127 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/embedded6xx/Kconfig b/arch/powerpc/platforms/embedded6xx/Kconfig
index 464e4147ad63..e318ced39e72 100644
--- a/arch/powerpc/platforms/embedded6xx/Kconfig
+++ b/arch/powerpc/platforms/embedded6xx/Kconfig
@@ -107,3 +107,11 @@ config USBGECKO_UDBG
 
           If in doubt, say N here.
 
+config GAMECUBE
+        bool "Nintendo-GameCube"
+        depends on EMBEDDED6xx
+        select GAMECUBE_COMMON
+        help
+          Select GAMECUBE if configuring for the Nintendo GameCube.
+          More information at: <http://gc-linux.sourceforge.net/>
+
diff --git a/arch/powerpc/platforms/embedded6xx/Makefile b/arch/powerpc/platforms/embedded6xx/Makefile
index b80f47cf4412..9365edda2977 100644
--- a/arch/powerpc/platforms/embedded6xx/Makefile
+++ b/arch/powerpc/platforms/embedded6xx/Makefile
@@ -9,3 +9,4 @@ obj-$(CONFIG_PPC_PRPMC2800)	+= prpmc2800.o
 obj-$(CONFIG_PPC_C2K)           += c2k.o
 obj-$(CONFIG_USBGECKO_UDBG)     += usbgecko_udbg.o
 obj-$(CONFIG_GAMECUBE_COMMON)   += flipper-pic.o
+obj-$(CONFIG_GAMECUBE)          += gamecube.o
diff --git a/arch/powerpc/platforms/embedded6xx/gamecube.c b/arch/powerpc/platforms/embedded6xx/gamecube.c
new file mode 100644
index 000000000000..1106fd99627f
--- /dev/null
+++ b/arch/powerpc/platforms/embedded6xx/gamecube.c
@@ -0,0 +1,118 @@
+/*
+ * arch/powerpc/platforms/embedded6xx/gamecube.c
+ *
+ * Nintendo GameCube board-specific support
+ * Copyright (C) 2004-2009 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.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/kexec.h>
+#include <linux/seq_file.h>
+#include <linux/of_platform.h>
+
+#include <asm/io.h>
+#include <asm/machdep.h>
+#include <asm/prom.h>
+#include <asm/time.h>
+#include <asm/udbg.h>
+
+#include "flipper-pic.h"
+#include "usbgecko_udbg.h"
+
+
+static void gamecube_spin(void)
+{
+        /* spin until power button pressed */
+        for (;;)
+                cpu_relax();
+}
+
+static void gamecube_restart(char *cmd)
+{
+        local_irq_disable();
+        flipper_platform_reset();
+        gamecube_spin();
+}
+
+static void gamecube_power_off(void)
+{
+        local_irq_disable();
+        gamecube_spin();
+}
+
+static void gamecube_halt(void)
+{
+        gamecube_restart(NULL);
+}
+
+static void __init gamecube_init_early(void)
+{
+        ug_udbg_init();
+}
+
+static int __init gamecube_probe(void)
+{
+        unsigned long dt_root;
+
+        dt_root = of_get_flat_dt_root();
+        if (!of_flat_dt_is_compatible(dt_root, "nintendo,gamecube"))
+                return 0;
+
+        return 1;
+}
+
+static void gamecube_shutdown(void)
+{
+        flipper_quiesce();
+}
+
+#ifdef CONFIG_KEXEC
+static int gamecube_kexec_prepare(struct kimage *image)
+{
+        return 0;
+}
+#endif /* CONFIG_KEXEC */
+
+
+define_machine(gamecube) {
+        .name                   = "gamecube",
+        .probe                  = gamecube_probe,
+        .init_early             = gamecube_init_early,
+        .restart                = gamecube_restart,
+        .power_off              = gamecube_power_off,
+        .halt                   = gamecube_halt,
+        .init_IRQ               = flipper_pic_probe,
+        .get_irq                = flipper_pic_get_irq,
+        .calibrate_decr         = generic_calibrate_decr,
+        .progress               = udbg_progress,
+        .machine_shutdown       = gamecube_shutdown,
+#ifdef CONFIG_KEXEC
+        .machine_kexec_prepare  = gamecube_kexec_prepare,
+#endif
+};
+
+
+static struct of_device_id gamecube_of_bus[] = {
+        { .compatible = "nintendo,flipper", },
+        { },
+};
+
+static int __init gamecube_device_probe(void)
+{
+        if (!machine_is(gamecube))
+                return 0;
+
+        of_platform_bus_probe(NULL, gamecube_of_bus, NULL);
+        return 0;
+}
+device_initcall(gamecube_device_probe);
+