1 files changed, 150 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/power.c b/arch/sparc64/kernel/power.c
new file mode 100644
index 00000000000..52f14e399b1
--- /dev/null
+++ b/arch/sparc64/kernel/power.c
@@ -0,0 +1,150 @@
+/* $Id: power.c,v 1.10 2001/12/11 01:57:16 davem Exp $
+ * power.c: Power management driver.
+ *
+ * Copyright (C) 1999 David S. Miller (davem@redhat.com)
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+
+#include <asm/system.h>
+#include <asm/ebus.h>
+#include <asm/auxio.h>
+
+#define __KERNEL_SYSCALLS__
+#include <linux/unistd.h>
+
+/*
+ * sysctl - toggle power-off restriction for serial console 
+ * systems in machine_power_off()
+ */
+int scons_pwroff = 1; 
+
+#ifdef CONFIG_PCI
+static void __iomem *power_reg;
+
+static DECLARE_WAIT_QUEUE_HEAD(powerd_wait);
+static int button_pressed;
+
+static irqreturn_t power_handler(int irq, void *dev_id, struct pt_regs *regs)
+{
+	if (button_pressed == 0) {
+		button_pressed = 1;
+		wake_up(&powerd_wait);
+	}
+
+	/* FIXME: Check registers for status... */
+	return IRQ_HANDLED;
+}
+#endif /* CONFIG_PCI */
+
+extern void machine_halt(void);
+extern void machine_alt_power_off(void);
+static void (*poweroff_method)(void) = machine_alt_power_off;
+
+void machine_power_off(void)
+{
+	if (!serial_console || scons_pwroff) {
+#ifdef CONFIG_PCI
+		if (power_reg) {
+			/* Both register bits seem to have the
+			 * same effect, so until I figure out
+			 * what the difference is...
+			 */
+			writel(AUXIO_PCIO_CPWR_OFF | AUXIO_PCIO_SPWR_OFF, power_reg);
+		} else
+#endif /* CONFIG_PCI */
+			if (poweroff_method != NULL) {
+				poweroff_method();
+				/* not reached */
+			}
+	}
+	machine_halt();
+}
+
+EXPORT_SYMBOL(machine_power_off);
+
+#ifdef CONFIG_PCI
+static int powerd(void *__unused)
+{
+	static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL };
+	char *argv[] = { "/sbin/shutdown", "-h", "now", NULL };
+	DECLARE_WAITQUEUE(wait, current);
+
+	daemonize("powerd");
+
+	add_wait_queue(&powerd_wait, &wait);
+again:
+	for (;;) {
+		set_task_state(current, TASK_INTERRUPTIBLE);
+		if (button_pressed)
+			break;
+		flush_signals(current);
+		schedule();
+	}
+	__set_current_state(TASK_RUNNING);
+	remove_wait_queue(&powerd_wait, &wait);
+
+	/* Ok, down we go... */
+	button_pressed = 0;
+	if (execve("/sbin/shutdown", argv, envp) < 0) {
+		printk("powerd: shutdown execution failed\n");
+		add_wait_queue(&powerd_wait, &wait);
+		goto again;
+	}
+	return 0;
+}
+
+static int __init has_button_interrupt(struct linux_ebus_device *edev)
+{
+	if (edev->irqs[0] == PCI_IRQ_NONE)
+		return 0;
+	if (!prom_node_has_property(edev->prom_node, "button"))
+		return 0;
+
+	return 1;
+}
+
+void __init power_init(void)
+{
+	struct linux_ebus *ebus;
+	struct linux_ebus_device *edev;
+	static int invoked;
+
+	if (invoked)
+		return;
+	invoked = 1;
+
+	for_each_ebus(ebus) {
+		for_each_ebusdev(edev, ebus) {
+			if (!strcmp(edev->prom_name, "power"))
+				goto found;
+		}
+	}
+	return;
+
+found:
+	power_reg = ioremap(edev->resource[0].start, 0x4);
+	printk("power: Control reg at %p ... ", power_reg);
+	poweroff_method = machine_halt;  /* able to use the standard halt */
+	if (has_button_interrupt(edev)) {
+		if (kernel_thread(powerd, NULL, CLONE_FS) < 0) {
+			printk("Failed to start power daemon.\n");
+			return;
+		}
+		printk("powerd running.\n");
+
+		if (request_irq(edev->irqs[0],
+				power_handler, SA_SHIRQ, "power", NULL) < 0)
+			printk("power: Error, cannot register IRQ handler.\n");
+	} else {
+		printk("not using powerd.\n");
+	}
+}
+#endif /* CONFIG_PCI */