From 527cb779b84abc5515837b5d485cfe13a92ef696 Mon Sep 17 00:00:00 2001
From: Michael Hennerich <michael.hennerich@analog.com>
Date: Thu, 11 Oct 2007 00:29:49 +0800
Subject: [PATCH] --- yaml --- r: 66022 b: refs/heads/master c:
 2714d9a6d1e68d30f5be8871722a7cff388c2d74 h: refs/heads/master v: v3

---
 [refs]                              |  2 +-
 trunk/arch/blackfin/kernel/reboot.c | 78 +++++++++++++++++++++++++++++
 trunk/include/asm-blackfin/reboot.h | 20 ++++++++
 3 files changed, 99 insertions(+), 1 deletion(-)
 create mode 100644 trunk/arch/blackfin/kernel/reboot.c
 create mode 100644 trunk/include/asm-blackfin/reboot.h

diff --git a/[refs] b/[refs]
index 5089b95b7594..bfe6679b9270 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4b3f058a7a34a10d99937e86bb28da118710ca9a
+refs/heads/master: 2714d9a6d1e68d30f5be8871722a7cff388c2d74
diff --git a/trunk/arch/blackfin/kernel/reboot.c b/trunk/arch/blackfin/kernel/reboot.c
new file mode 100644
index 000000000000..356078ec462b
--- /dev/null
+++ b/trunk/arch/blackfin/kernel/reboot.c
@@ -0,0 +1,78 @@
+/*
+ * arch/blackfin/kernel/reboot.c - handle shutdown/reboot
+ *
+ * Copyright 2004-2007 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/interrupt.h>
+#include <asm/bfin-global.h>
+#include <asm/reboot.h>
+#include <asm/system.h>
+
+#if defined(BF537_FAMILY) || defined(BF533_FAMILY)
+#define SYSCR_VAL 	0x0
+#elif defined(BF561_FAMILY)
+#define SYSCR_VAL 	0x20
+#elif defined(BF548_FAMILY)
+#define SYSCR_VAL 	0x10
+#endif
+
+/* A system soft reset makes external memory unusable
+ * so force this function into L1.
+ */
+__attribute__((l1_text))
+void bfin_reset(void)
+{
+	/* force BMODE and disable Core B (as needed) */
+	bfin_write_SYSCR(SYSCR_VAL);
+
+	/* we use asm ssync here because it's save and we save some L1 */
+	asm("ssync;");
+
+	while (1) {
+		/* initiate system soft reset with magic 0x7 */
+		bfin_write_SWRST(0x7);
+		asm("ssync;");
+		/* clear system soft reset */
+		bfin_write_SWRST(0);
+		asm("ssync;");
+		/* issue core reset */
+		asm("raise 1");
+	}
+}
+
+__attribute__((weak))
+void native_machine_restart(char *cmd)
+{
+}
+
+void machine_restart(char *cmd)
+{
+	native_machine_restart(cmd);
+	local_irq_disable();
+	bfin_reset();
+}
+
+__attribute__((weak))
+void native_machine_halt(void)
+{
+	idle_with_irq_disabled();
+}
+
+void machine_halt(void)
+{
+	native_machine_halt();
+}
+
+__attribute__((weak))
+void native_machine_power_off(void)
+{
+	idle_with_irq_disabled();
+}
+
+void machine_power_off(void)
+{
+	native_machine_power_off();
+}
diff --git a/trunk/include/asm-blackfin/reboot.h b/trunk/include/asm-blackfin/reboot.h
new file mode 100644
index 000000000000..6d448b5f5985
--- /dev/null
+++ b/trunk/include/asm-blackfin/reboot.h
@@ -0,0 +1,20 @@
+/*
+ * include/asm-blackfin/reboot.h - shutdown/reboot header
+ *
+ * Copyright 2004-2007 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __ASM_REBOOT_H__
+#define __ASM_REBOOT_H__
+
+/* optional board specific hooks */
+extern void native_machine_restart(char *cmd);
+extern void native_machine_halt(void);
+extern void native_machine_power_off(void);
+
+/* common reboot workarounds */
+extern void bfin_gpio_reset_spi0_ssel1(void);
+
+#endif