[mirror_ubuntu-artful-kernel.git] / arch / sparc64 / kernel / power.c

/* $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)
 */

#define __KERNEL_SYSCALLS__

#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 <linux/pm.h>

#include <asm/system.h>
#include <asm/ebus.h>
#include <asm/isa.h>
#include <asm/auxio.h>

#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();
}

void (*pm_power_off)(void) = machine_power_off;
EXPORT_SYMBOL(pm_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(unsigned int irq, struct device_node *dp)
{
	if (irq == PCI_IRQ_NONE)
		return 0;
	if (!of_find_property(dp, "button", NULL))
		return 0;

	return 1;
}

static void __devinit power_probe_common(struct of_device *dev, struct resource *res, unsigned int irq)
{
	power_reg = ioremap(res->start, 0x4);

	printk("power: Control reg at %p ... ", power_reg);

	poweroff_method = machine_halt;  /* able to use the standard halt */

	if (has_button_interrupt(irq, dev->node)) {
		if (kernel_thread(powerd, NULL, CLONE_FS) < 0) {
			printk("Failed to start power daemon.\n");
			return;
		}
		printk("powerd running.\n");

		if (request_irq(irq,
				power_handler, 0, "power", NULL) < 0)
			printk("power: Error, cannot register IRQ handler.\n");
	} else {
		printk("not using powerd.\n");
	}
}

static struct of_device_id power_match[] = {
	{
		.name = "power",
	},
	{},
};

static int __devinit ebus_power_probe(struct of_device *dev, const struct of_device_id *match)
{
	struct linux_ebus_device *edev = to_ebus_device(&dev->dev);
	struct resource *res = &edev->resource[0];
	unsigned int irq = edev->irqs[0];

	power_probe_common(dev, res,irq);

	return 0;
}

static struct of_platform_driver ebus_power_driver = {
	.name		= "power",
	.match_table	= power_match,
	.probe		= ebus_power_probe,
};

static int __devinit isa_power_probe(struct of_device *dev, const struct of_device_id *match)
{
	struct sparc_isa_device *idev = to_isa_device(&dev->dev);
	struct resource *res = &idev->resource;
	unsigned int irq = idev->irq;

	power_probe_common(dev, res,irq);

	return 0;
}

static struct of_platform_driver isa_power_driver = {
	.name		= "power",
	.match_table	= power_match,
	.probe		= isa_power_probe,
};

void __init power_init(void)
{
	of_register_driver(&ebus_power_driver, &ebus_bus_type);
	of_register_driver(&isa_power_driver, &isa_bus_type);
	return;
}
#endif /* CONFIG_PCI */
Commit	Line	Data
1da177e4 LT	1	/* $Id: power.c,v 1.10 2001/12/11 01:57:16 davem Exp $
	2	* power.c: Power management driver.
	3	*
	4	* Copyright (C) 1999 David S. Miller (davem@redhat.com)
	5	*/
	6
bb49bcda DM	7	#define __KERNEL_SYSCALLS__
bb49bcda DM	8
1da177e4 LT	9	#include <linux/config.h>
	10	#include <linux/kernel.h>
	11	#include <linux/module.h>
	12	#include <linux/init.h>
	13	#include <linux/sched.h>
	14	#include <linux/signal.h>
	15	#include <linux/delay.h>
	16	#include <linux/interrupt.h>
90bf8116	17	#include <linux/pm.h>
1da177e4 LT	18
	19	#include <asm/system.h>
	20	#include <asm/ebus.h>
2256c13b	21	#include <asm/isa.h>
1da177e4 LT	22	#include <asm/auxio.h>
1da177e4 LT	23
1da177e4 LT	24	#include <linux/unistd.h>
	25
	26	/*
	27	* sysctl - toggle power-off restriction for serial console
	28	* systems in machine_power_off()
	29	*/
	30	int scons_pwroff = 1;
	31
	32	#ifdef CONFIG_PCI
	33	static void __iomem *power_reg;
	34
	35	static DECLARE_WAIT_QUEUE_HEAD(powerd_wait);
	36	static int button_pressed;
	37
	38	static irqreturn_t power_handler(int irq, void dev_id, struct pt_regs regs)
	39	{
	40	if (button_pressed == 0) {
	41	button_pressed = 1;
	42	wake_up(&powerd_wait);
	43	}
	44
	45	/* FIXME: Check registers for status... */
	46	return IRQ_HANDLED;
	47	}
	48	#endif /* CONFIG_PCI */
	49
	50	extern void machine_halt(void);
	51	extern void machine_alt_power_off(void);
	52	static void (*poweroff_method)(void) = machine_alt_power_off;
	53
	54	void machine_power_off(void)
	55	{
	56	if (!serial_console \|\| scons_pwroff) {
	57	#ifdef CONFIG_PCI
	58	if (power_reg) {
	59	/* Both register bits seem to have the
	60	* same effect, so until I figure out
	61	* what the difference is...
	62	*/
	63	writel(AUXIO_PCIO_CPWR_OFF \| AUXIO_PCIO_SPWR_OFF, power_reg);
	64	} else
	65	#endif /* CONFIG_PCI */
	66	if (poweroff_method != NULL) {
	67	poweroff_method();
	68	/* not reached */
	69	}
	70	}
	71	machine_halt();
	72	}
	73
90bf8116 DM	74	void (*pm_power_off)(void) = machine_power_off;
	75	EXPORT_SYMBOL(pm_power_off);
	76
1da177e4 LT	77	#ifdef CONFIG_PCI
	78	static int powerd(void *__unused)
	79	{
	80	static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL };
	81	char *argv[] = { "/sbin/shutdown", "-h", "now", NULL };
	82	DECLARE_WAITQUEUE(wait, current);
	83
	84	daemonize("powerd");
	85
	86	add_wait_queue(&powerd_wait, &wait);
	87	again:
	88	for (;;) {
	89	set_task_state(current, TASK_INTERRUPTIBLE);
	90	if (button_pressed)
	91	break;
	92	flush_signals(current);
	93	schedule();
	94	}
	95	__set_current_state(TASK_RUNNING);
	96	remove_wait_queue(&powerd_wait, &wait);
	97
	98	/* Ok, down we go... */
	99	button_pressed = 0;
	100	if (execve("/sbin/shutdown", argv, envp) < 0) {
	101	printk("powerd: shutdown execution failed\n");
	102	add_wait_queue(&powerd_wait, &wait);
	103	goto again;
	104	}
	105	return 0;
	106	}
	107
690c8fd3	108	static int __init has_button_interrupt(unsigned int irq, struct device_node *dp)
1da177e4	109	{
2256c13b	110	if (irq == PCI_IRQ_NONE)
1da177e4	111	return 0;
690c8fd3	112	if (!of_find_property(dp, "button", NULL))
1da177e4 LT	113	return 0;
	114
	115	return 1;
	116	}
	117
a2bd4fd1	118	static void __devinit power_probe_common(struct of_device dev, struct resource res, unsigned int irq)
1da177e4	119	{
2256c13b	120	power_reg = ioremap(res->start, 0x4);
a2bd4fd1	121
1da177e4	122	printk("power: Control reg at %p ... ", power_reg);
a2bd4fd1	123
1da177e4	124	poweroff_method = machine_halt; /* able to use the standard halt */
a2bd4fd1 DM	125
a2bd4fd1 DM	126	if (has_button_interrupt(irq, dev->node)) {
1da177e4 LT	127	if (kernel_thread(powerd, NULL, CLONE_FS) < 0) {
	128	printk("Failed to start power daemon.\n");
	129	return;
	130	}
	131	printk("powerd running.\n");
	132
2256c13b	133	if (request_irq(irq,
00cde674	134	power_handler, 0, "power", NULL) < 0)
1da177e4 LT	135	printk("power: Error, cannot register IRQ handler.\n");
	136	} else {
	137	printk("not using powerd.\n");
	138	}
	139	}
a2bd4fd1 DM	140
	141	static struct of_device_id power_match[] = {
	142	{
	143	.name = "power",
	144	},
	145	{},
	146	};
	147
	148	static int __devinit ebus_power_probe(struct of_device dev, const struct of_device_id match)
	149	{
	150	struct linux_ebus_device *edev = to_ebus_device(&dev->dev);
	151	struct resource *res = &edev->resource[0];
	152	unsigned int irq = edev->irqs[0];
	153
	154	power_probe_common(dev, res,irq);
	155
	156	return 0;
	157	}
	158
	159	static struct of_platform_driver ebus_power_driver = {
	160	.name = "power",
	161	.match_table = power_match,
	162	.probe = ebus_power_probe,
	163	};
	164
	165	static int __devinit isa_power_probe(struct of_device dev, const struct of_device_id match)
	166	{
	167	struct sparc_isa_device *idev = to_isa_device(&dev->dev);
	168	struct resource *res = &idev->resource;
	169	unsigned int irq = idev->irq;
	170
	171	power_probe_common(dev, res,irq);
	172
	173	return 0;
	174	}
	175
	176	static struct of_platform_driver isa_power_driver = {
	177	.name = "power",
	178	.match_table = power_match,
	179	.probe = isa_power_probe,
	180	};
	181
	182	void __init power_init(void)
	183	{
	184	of_register_driver(&ebus_power_driver, &ebus_bus_type);
	185	of_register_driver(&isa_power_driver, &isa_bus_type);
	186	return;
	187	}
1da177e4	188	#endif /* CONFIG_PCI */