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 000000000000..52f14e399b1c
--- /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 */