[deliverable/linux.git] / arch / blackfin / mach-common / pm.c

/*
 * File:         arch/blackfin/mach-common/pm.c
 * Based on:     arm/mach-omap/pm.c
 * Author:       Cliff Brake <cbrake@accelent.com> Copyright (c) 2001
 *
 * Created:      2001
 * Description:  Blackfin power management
 *
 * Modified:     Nicolas Pitre - PXA250 support
 *                Copyright (c) 2002 Monta Vista Software, Inc.
 *               David Singleton - OMAP1510
 *                Copyright (c) 2002 Monta Vista Software, Inc.
 *               Dirk Behme <dirk.behme@de.bosch.com> - OMAP1510/1610
 *                Copyright 2004
 *               Copyright 2004-2008 Analog Devices Inc.
 *
 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see the file COPYING, or write
 * to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <linux/suspend.h>
#include <linux/sched.h>
#include <linux/proc_fs.h>
#include <linux/io.h>
#include <linux/irq.h>

#include <asm/dpmc.h>
#include <asm/gpio.h>

#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_H
#define WAKEUP_TYPE	PM_WAKE_HIGH
#endif

#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_L
#define WAKEUP_TYPE	PM_WAKE_LOW
#endif

#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_F
#define WAKEUP_TYPE	PM_WAKE_FALLING
#endif

#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_R
#define WAKEUP_TYPE	PM_WAKE_RISING
#endif

#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_B
#define WAKEUP_TYPE	PM_WAKE_BOTH_EDGES
#endif

void bfin_pm_suspend_standby_enter(void)
{
#ifdef CONFIG_PM_WAKEUP_BY_GPIO
	gpio_pm_wakeup_request(CONFIG_PM_WAKEUP_GPIO_NUMBER, WAKEUP_TYPE);
#endif

	u32 flags;

	local_irq_save(flags);
	bfin_pm_setup();

#ifdef CONFIG_PM_BFIN_SLEEP_DEEPER
	sleep_deeper(bfin_sic_iwr[0], bfin_sic_iwr[1], bfin_sic_iwr[2]);
#else
	sleep_mode(bfin_sic_iwr[0], bfin_sic_iwr[1], bfin_sic_iwr[2]);
#endif

	bfin_pm_restore();

#if defined(CONFIG_BF54x) || defined(CONFIG_BF52x)  || defined(CONFIG_BF561)
	bfin_write_SIC_IWR0(IWR_ENABLE_ALL);
	bfin_write_SIC_IWR1(IWR_ENABLE_ALL);
# ifdef CONFIG_BF54x
	bfin_write_SIC_IWR2(IWR_ENABLE_ALL);
# endif
#else
	bfin_write_SIC_IWR(IWR_ENABLE_ALL);
#endif

	local_irq_restore(flags);
}

/*
 *	bfin_pm_valid - Tell the PM core that we only support the standby sleep
 *			state
 *	@state:		suspend state we're checking.
 *
 */
static int bfin_pm_valid(suspend_state_t state)
{
	return (state == PM_SUSPEND_STANDBY);
}

/*
 *	bfin_pm_enter - Actually enter a sleep state.
 *	@state:		State we're entering.
 *
 */
static int bfin_pm_enter(suspend_state_t state)
{
	switch (state) {
	case PM_SUSPEND_STANDBY:
		bfin_pm_suspend_standby_enter();
		break;

	case PM_SUSPEND_MEM:
		return -ENOTSUPP;

	default:
		return -EINVAL;
	}

	return 0;
}

struct platform_suspend_ops bfin_pm_ops = {
	.enter = bfin_pm_enter,
	.valid	= bfin_pm_valid,
};

static int __init bfin_pm_init(void)
{
	suspend_set_ops(&bfin_pm_ops);
	return 0;
}

__initcall(bfin_pm_init);
Commit	Line	Data
1394f032 BW	1	/*
	2	* File: arch/blackfin/mach-common/pm.c
	3	* Based on: arm/mach-omap/pm.c
	4	* Author: Cliff Brake <cbrake@accelent.com> Copyright (c) 2001
	5	*
	6	* Created: 2001
cfefe3c6	7	* Description: Blackfin power management
1394f032 BW	8	*
	9	* Modified: Nicolas Pitre - PXA250 support
	10	* Copyright (c) 2002 Monta Vista Software, Inc.
	11	* David Singleton - OMAP1510
	12	* Copyright (c) 2002 Monta Vista Software, Inc.
	13	* Dirk Behme <dirk.behme@de.bosch.com> - OMAP1510/1610
	14	* Copyright 2004
cfefe3c6	15	* Copyright 2004-2008 Analog Devices Inc.
1394f032 BW	16	*
	17	* Bugs: Enter bugs at http://blackfin.uclinux.org/
	18	*
	19	* This program is free software; you can redistribute it and/or modify
	20	* it under the terms of the GNU General Public License as published by
	21	* the Free Software Foundation; either version 2 of the License, or
	22	* (at your option) any later version.
	23	*
	24	* This program is distributed in the hope that it will be useful,
	25	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	26	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	27	* GNU General Public License for more details.
	28	*
	29	* You should have received a copy of the GNU General Public License
	30	* along with this program; if not, see the file COPYING, or write
	31	* to the Free Software Foundation, Inc.,
	32	* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	33	*/
	34
95d9ffbe	35	#include <linux/suspend.h>
1394f032 BW	36	#include <linux/sched.h>
1394f032 BW	37	#include <linux/proc_fs.h>
1f83b8f1 MF	38	#include <linux/io.h>
1f83b8f1 MF	39	#include <linux/irq.h>
1394f032	40
1394f032	41	#include <asm/dpmc.h>
fd92348e	42	#include <asm/gpio.h>
1394f032 BW	43
	44	#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_H
	45	#define WAKEUP_TYPE PM_WAKE_HIGH
	46	#endif
	47
	48	#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_L
	49	#define WAKEUP_TYPE PM_WAKE_LOW
	50	#endif
	51
	52	#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_F
	53	#define WAKEUP_TYPE PM_WAKE_FALLING
	54	#endif
	55
	56	#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_R
	57	#define WAKEUP_TYPE PM_WAKE_RISING
	58	#endif
	59
	60	#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_B
	61	#define WAKEUP_TYPE PM_WAKE_BOTH_EDGES
	62	#endif
	63
	64	void bfin_pm_suspend_standby_enter(void)
	65	{
	66	#ifdef CONFIG_PM_WAKEUP_BY_GPIO
	67	gpio_pm_wakeup_request(CONFIG_PM_WAKEUP_GPIO_NUMBER, WAKEUP_TYPE);
	68	#endif
	69
cfefe3c6	70	u32 flags;
1394f032	71
cfefe3c6 MH	72	local_irq_save(flags);
cfefe3c6 MH	73	bfin_pm_setup();
1394f032	74
cfefe3c6 MH	75	#ifdef CONFIG_PM_BFIN_SLEEP_DEEPER
cfefe3c6 MH	76	sleep_deeper(bfin_sic_iwr[0], bfin_sic_iwr[1], bfin_sic_iwr[2]);
fb5f0049	77	#else
cfefe3c6	78	sleep_mode(bfin_sic_iwr[0], bfin_sic_iwr[1], bfin_sic_iwr[2]);
fb5f0049	79	#endif
1394f032	80
cfefe3c6	81	bfin_pm_restore();
1394f032	82
cfefe3c6	83	#if defined(CONFIG_BF54x) \|\| defined(CONFIG_BF52x) \|\| defined(CONFIG_BF561)
fb5f0049 SZ	84	bfin_write_SIC_IWR0(IWR_ENABLE_ALL);
fb5f0049 SZ	85	bfin_write_SIC_IWR1(IWR_ENABLE_ALL);
cfefe3c6	86	# ifdef CONFIG_BF54x
fb5f0049	87	bfin_write_SIC_IWR2(IWR_ENABLE_ALL);
fb5f0049	88	# endif
cfefe3c6 MH	89	#else
	90	bfin_write_SIC_IWR(IWR_ENABLE_ALL);
	91	#endif
	92
	93	local_irq_restore(flags);
1394f032 BW	94	}
1394f032 BW	95
1394f032	96	/*
e6c5eb95 RW	97	* bfin_pm_valid - Tell the PM core that we only support the standby sleep
	98	* state
	99	* @state: suspend state we're checking.
1394f032 BW	100	*
1394f032 BW	101	*/
e6c5eb95	102	static int bfin_pm_valid(suspend_state_t state)
1394f032	103	{
e6c5eb95	104	return (state == PM_SUSPEND_STANDBY);
1394f032 BW	105	}
	106
	107	/*
	108	* bfin_pm_enter - Actually enter a sleep state.
	109	* @state: State we're entering.
	110	*
	111	*/
	112	static int bfin_pm_enter(suspend_state_t state)
	113	{
	114	switch (state) {
	115	case PM_SUSPEND_STANDBY:
	116	bfin_pm_suspend_standby_enter();
	117	break;
1394f032	118
9d7b6677	119	case PM_SUSPEND_MEM:
1394f032 BW	120	return -ENOTSUPP;
	121
	122	default:
	123	return -EINVAL;
	124	}
	125
	126	return 0;
	127	}
	128
26398a70	129	struct platform_suspend_ops bfin_pm_ops = {
1394f032	130	.enter = bfin_pm_enter,
4bbd10fd	131	.valid = bfin_pm_valid,
1394f032 BW	132	};
	133
	134	static int __init bfin_pm_init(void)
	135	{
26398a70	136	suspend_set_ops(&bfin_pm_ops);
1394f032 BW	137	return 0;
	138	}
	139
	140	__initcall(bfin_pm_init);