summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-shmobile/pm-r8a7779.c
blob: f0f36cb5ffe7103bed31280cdb0f0bfa772edf19 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
/*
 * r8a7779 Power management support
 *
 * Copyright (C) 2011  Renesas Solutions Corp.
 * Copyright (C) 2011  Magnus Damm
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#include <linux/pm.h>
#include <linux/suspend.h>
#include <linux/err.h>
#include <linux/pm_clock.h>
#include <linux/pm_domain.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/console.h>
#include <asm/io.h>
#include <mach/r8a7779.h>
#include "common.h"
#include "pm-rcar.h"

/* SYSC */
#define SYSCIER 0x0c
#define SYSCIMR 0x10

struct r8a7779_pm_domain {
	struct generic_pm_domain genpd;
	struct rcar_sysc_ch ch;
};

static inline struct rcar_sysc_ch *to_r8a7779_ch(struct generic_pm_domain *d)
{
	return &container_of(d, struct r8a7779_pm_domain, genpd)->ch;
}

#if defined(CONFIG_PM) || defined(CONFIG_SMP)

static void __init r8a7779_sysc_init(void)
{
	void __iomem *base = rcar_sysc_init(0xffd85000);

	/* enable all interrupt sources, but do not use interrupt handler */
	iowrite32(0x0131000e, base + SYSCIER);
	iowrite32(0, base + SYSCIMR);
}

#else /* CONFIG_PM || CONFIG_SMP */

static inline void r8a7779_sysc_init(void) {}

#endif /* CONFIG_PM || CONFIG_SMP */

#ifdef CONFIG_PM

static int pd_power_down(struct generic_pm_domain *genpd)
{
	return rcar_sysc_power_down(to_r8a7779_ch(genpd));
}

static int pd_power_up(struct generic_pm_domain *genpd)
{
	return rcar_sysc_power_up(to_r8a7779_ch(genpd));
}

static bool pd_is_off(struct generic_pm_domain *genpd)
{
	return rcar_sysc_power_is_off(to_r8a7779_ch(genpd));
}

static bool pd_active_wakeup(struct device *dev)
{
	return true;
}

static void r8a7779_init_pm_domain(struct r8a7779_pm_domain *r8a7779_pd)
{
	struct generic_pm_domain *genpd = &r8a7779_pd->genpd;

	pm_genpd_init(genpd, NULL, false);
	genpd->dev_ops.stop = pm_clk_suspend;
	genpd->dev_ops.start = pm_clk_resume;
	genpd->dev_ops.active_wakeup = pd_active_wakeup;
	genpd->dev_irq_safe = true;
	genpd->power_off = pd_power_down;
	genpd->power_on = pd_power_up;

	if (pd_is_off(&r8a7779_pd->genpd))
		pd_power_up(&r8a7779_pd->genpd);
}

static struct r8a7779_pm_domain r8a7779_pm_domains[] = {
	{
		.genpd.name = "SH4A",
		.ch = {
			.chan_offs = 0x80, /* PWRSR1 .. PWRER1 */
			.isr_bit = 16, /* SH4A */
		},
	},
	{
		.genpd.name = "SGX",
		.ch = {
			.chan_offs = 0xc0, /* PWRSR2 .. PWRER2 */
			.isr_bit = 20, /* SGX */
		},
	},
	{
		.genpd.name = "VDP1",
		.ch = {
			.chan_offs = 0x100, /* PWRSR3 .. PWRER3 */
			.isr_bit = 21, /* VDP */
		},
	},
	{
		.genpd.name = "IMPX3",
		.ch = {
			.chan_offs = 0x140, /* PWRSR4 .. PWRER4 */
			.isr_bit = 24, /* IMP */
		},
	},
};

void __init r8a7779_init_pm_domains(void)
{
	int j;

	for (j = 0; j < ARRAY_SIZE(r8a7779_pm_domains); j++)
		r8a7779_init_pm_domain(&r8a7779_pm_domains[j]);
}

#endif /* CONFIG_PM */

void __init r8a7779_pm_init(void)
{
	static int once;

	if (!once++)
		r8a7779_sysc_init();
}