[mirror_ubuntu-zesty-kernel.git] / arch / arm / mach-s3c2410 / include / mach / system.h

/* arch/arm/mach-s3c2410/include/mach/system.h
 *
 * Copyright (c) 2003 Simtec Electronics
 *	Ben Dooks <ben@simtec.co.uk>
 *
 * S3C2410 - System function defines and includes
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
*/

#include <linux/io.h>
#include <mach/hardware.h>

#include <mach/map.h>
#include <mach/idle.h>

#include <mach/regs-clock.h>

void (*s3c24xx_idle)(void);

void s3c24xx_default_idle(void)
{
	unsigned long tmp;
	int i;

	/* idle the system by using the idle mode which will wait for an
	 * interrupt to happen before restarting the system.
	 */

	/* Warning: going into idle state upsets jtag scanning */

	__raw_writel(__raw_readl(S3C2410_CLKCON) | S3C2410_CLKCON_IDLE,
		     S3C2410_CLKCON);

	/* the samsung port seems to do a loop and then unset idle.. */
	for (i = 0; i < 50; i++) {
		tmp += __raw_readl(S3C2410_CLKCON); /* ensure loop not optimised out */
	}

	/* this bit is not cleared on re-start... */

	__raw_writel(__raw_readl(S3C2410_CLKCON) & ~S3C2410_CLKCON_IDLE,
		     S3C2410_CLKCON);
}

static void arch_idle(void)
{
	if (s3c24xx_idle != NULL)
		(s3c24xx_idle)();
	else
		s3c24xx_default_idle();
}
Commit	Line	Data
a09e64fb	1	/* arch/arm/mach-s3c2410/include/mach/system.h
1da177e4	2	*
f056076e BD	3	* Copyright (c) 2003 Simtec Electronics
f056076e BD	4	* Ben Dooks <ben@simtec.co.uk>
1da177e4 LT	5	*
	6	* S3C2410 - System function defines and includes
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
3c06cd1c	11	*/
1da177e4	12
fced80c7	13	#include <linux/io.h>
a09e64fb	14	#include <mach/hardware.h>
1da177e4	15
a09e64fb RK	16	#include <mach/map.h>
a09e64fb RK	17	#include <mach/idle.h>
1da177e4	18
a09e64fb	19	#include <mach/regs-clock.h>
1da177e4 LT	20
	21	void (*s3c24xx_idle)(void);
	22
	23	void s3c24xx_default_idle(void)
	24	{
1da177e4 LT	25	unsigned long tmp;
	26	int i;
	27
	28	/* idle the system by using the idle mode which will wait for an
	29	* interrupt to happen before restarting the system.
	30	*/
	31
	32	/* Warning: going into idle state upsets jtag scanning */
	33
b05f8717 MR	34	__raw_writel(__raw_readl(S3C2410_CLKCON) \| S3C2410_CLKCON_IDLE,
b05f8717 MR	35	S3C2410_CLKCON);
1da177e4 LT	36
	37	/* the samsung port seems to do a loop and then unset idle.. */
	38	for (i = 0; i < 50; i++) {
b05f8717	39	tmp += __raw_readl(S3C2410_CLKCON); /* ensure loop not optimised out */
1da177e4 LT	40	}
	41
	42	/* this bit is not cleared on re-start... */
	43
b05f8717 MR	44	__raw_writel(__raw_readl(S3C2410_CLKCON) & ~S3C2410_CLKCON_IDLE,
b05f8717 MR	45	S3C2410_CLKCON);
1da177e4 LT	46	}
	47
	48	static void arch_idle(void)
	49	{
	50	if (s3c24xx_idle != NULL)
	51	(s3c24xx_idle)();
	52	else
	53	s3c24xx_default_idle();
	54	}