[Patch 4/5] xbox: add reboot code

[Ed Schouten]

The Microsoft Xbox uses a different method to reboot or halt the system.
Therefore, we need to add some functions to alternatively shutdown the
system.

You can also download this patch at:
http://linux.g-rave.nl/patches/patch-xbox-reboot.diff
---

 arch/i386/Makefile           |    3 +++
 arch/i386/mach-xbox/Makefile |    5 +++++
 arch/i386/mach-xbox/reboot.c |   39 +++++++++++++++++++++++++++++++++++++++
 include/asm-i386/xbox.h      |   17 +++++++++++++++++
 4 files changed, 64 insertions(+)

diff -u -r --new-file linux-2.6.9-rc3/arch/i386/Makefile
linux-2.6.9-rc3-ed0/arch/i386/Makefile
--- linux-2.6.9-rc3/arch/i386/Makefile	2004-09-30 05:04:26.000000000 +0200
+++ linux-2.6.9-rc3-ed0/arch/i386/Makefile	2004-10-09 21:08:11.380284000
+0200
@@ -69,6 +69,9 @@
 mflags-$(CONFIG_X86_VOYAGER)	:= -Iinclude/asm-i386/mach-voyager
 mcore-$(CONFIG_X86_VOYAGER)	:= mach-voyager

+# Xbox subarch support
+core-$(CONFIG_X86_XBOX)		+= arch/i386/mach-xbox/
+
 # VISWS subarch support
 mflags-$(CONFIG_X86_VISWS)	:= -Iinclude/asm-i386/mach-visws
 mcore-$(CONFIG_X86_VISWS)	:= mach-visws
diff -u -r --new-file linux-2.6.9-rc3/arch/i386/mach-xbox/Makefile
linux-2.6.9-rc3-ed0/arch/i386/mach-xbox/Makefile
--- linux-2.6.9-rc3/arch/i386/mach-xbox/Makefile	1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.9-rc3-ed0/arch/i386/mach-xbox/Makefile	2004-10-09
21:08:11.401284000 +0200
@@ -0,0 +1,5 @@
+#
+# Makefile for the linux kernel.
+#
+
+obj-y				:= reboot.o
diff -u -r --new-file linux-2.6.9-rc3/arch/i386/mach-xbox/reboot.c
linux-2.6.9-rc3-ed0/arch/i386/mach-xbox/reboot.c
--- linux-2.6.9-rc3/arch/i386/mach-xbox/reboot.c	1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.9-rc3-ed0/arch/i386/mach-xbox/reboot.c	2004-10-09
21:08:30.105284000 +0200
@@ -0,0 +1,39 @@
+/*
+ * arch/i386/mach-xbox/reboot.c
+ * Ed Schouten <ed@xxxxxxxxxxxx>
+ *
+ * Originally done by:
+ * Olivier Fauchon <olivier.fauchon@xxxxxxx>
+ * Anders Gustafsson <andersg@xxxxxxx>
+ *
+ */
+
+#include <asm/io.h>
+#include <asm-i386/xbox.h>
+
+/* we don't use any of those, but dmi_scan.c needs 'em */
+void (*pm_power_off)(void);
+int reboot_thru_bios;
+
+static void xbox_pic_cmd(u8 command)
+{
+	outw_p(((XBOX_PIC_ADDRESS) << 1), XBOX_SMB_HOST_ADDRESS);
+	outb_p(SMC_CMD_POWER, XBOX_SMB_HOST_COMMAND);
+	outw_p(command, XBOX_SMB_HOST_DATA);
+	outw_p(inw(XBOX_SMB_IO_BASE), XBOX_SMB_IO_BASE);
+	outb_p(0x0a, XBOX_SMB_GLOBAL_ENABLE);
+}
+
+void machine_restart(char * __unused)
+{
+	xbox_pic_cmd(SMC_SUBCMD_POWER_CYCLE);
+}
+
+void machine_power_off(void)
+{
+	xbox_pic_cmd(SMC_SUBCMD_POWER_OFF);
+}
+
+void machine_halt(void)
+{
+}
diff -u -r --new-file linux-2.6.9-rc3/include/asm-i386/xbox.h
linux-2.6.9-rc3-ed0/include/asm-i386/xbox.h
--- linux-2.6.9-rc3/include/asm-i386/xbox.h	1970-01-01 01:00:00.000000000
+0100
+++ linux-2.6.9-rc3-ed0/include/asm-i386/xbox.h	2004-10-09
21:08:11.448284000 +0200
@@ -0,0 +1,17 @@
+/*
+ * include/asm-i386/xbox.h
+ * Ed Schouten <ed@xxxxxxxxxxxx>
+ */
+
+#define XBOX_SMB_IO_BASE               0xC000
+#define XBOX_SMB_HOST_ADDRESS          (0x4 + XBOX_SMB_IO_BASE)
+#define XBOX_SMB_HOST_COMMAND          (0x8 + XBOX_SMB_IO_BASE)
+#define XBOX_SMB_HOST_DATA             (0x6 + XBOX_SMB_IO_BASE)
+#define XBOX_SMB_GLOBAL_ENABLE         (0x2 + XBOX_SMB_IO_BASE)
+
+#define XBOX_PIC_ADDRESS               0x10
+
+#define SMC_CMD_POWER                  0x02
+#define SMC_SUBCMD_POWER_RESET         0x01
+#define SMC_SUBCMD_POWER_CYCLE         0x40
+#define SMC_SUBCMD_POWER_OFF           0x80
-
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