1/*
2 * r8a7779 Power management support
3 *
4 * Copyright (C) 2011  Renesas Solutions Corp.
5 * Copyright (C) 2011  Magnus Damm
6 *
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License.  See the file "COPYING" in the main directory of this archive
9 * for more details.
10 */
11
12#include <linux/pm.h>
13#include <linux/suspend.h>
14#include <linux/err.h>
15#include <linux/pm_clock.h>
16#include <linux/pm_domain.h>
17#include <linux/platform_device.h>
18#include <linux/delay.h>
19#include <linux/irq.h>
20#include <linux/interrupt.h>
21#include <linux/console.h>
22
23#include <asm/io.h>
24
25#include "common.h"
26#include "pm-rcar.h"
27#include "r8a7779.h"
28
29/* SYSC */
30#define SYSCIER 0x0c
31#define SYSCIMR 0x10
32
33struct r8a7779_pm_domain {
34	struct generic_pm_domain genpd;
35	struct rcar_sysc_ch ch;
36};
37
38static inline struct rcar_sysc_ch *to_r8a7779_ch(struct generic_pm_domain *d)
39{
40	return &container_of(d, struct r8a7779_pm_domain, genpd)->ch;
41}
42
43#if defined(CONFIG_PM) || defined(CONFIG_SMP)
44
45static void __init r8a7779_sysc_init(void)
46{
47	void __iomem *base = rcar_sysc_init(0xffd85000);
48
49	/* enable all interrupt sources, but do not use interrupt handler */
50	iowrite32(0x0131000e, base + SYSCIER);
51	iowrite32(0, base + SYSCIMR);
52}
53
54#else /* CONFIG_PM || CONFIG_SMP */
55
56static inline void r8a7779_sysc_init(void) {}
57
58#endif /* CONFIG_PM || CONFIG_SMP */
59
60#ifdef CONFIG_PM
61
62static int pd_power_down(struct generic_pm_domain *genpd)
63{
64	return rcar_sysc_power_down(to_r8a7779_ch(genpd));
65}
66
67static int pd_power_up(struct generic_pm_domain *genpd)
68{
69	return rcar_sysc_power_up(to_r8a7779_ch(genpd));
70}
71
72static bool pd_is_off(struct generic_pm_domain *genpd)
73{
74	return rcar_sysc_power_is_off(to_r8a7779_ch(genpd));
75}
76
77static bool pd_active_wakeup(struct device *dev)
78{
79	return true;
80}
81
82static void r8a7779_init_pm_domain(struct r8a7779_pm_domain *r8a7779_pd)
83{
84	struct generic_pm_domain *genpd = &r8a7779_pd->genpd;
85
86	pm_genpd_init(genpd, NULL, false);
87	genpd->dev_ops.stop = pm_clk_suspend;
88	genpd->dev_ops.start = pm_clk_resume;
89	genpd->dev_ops.active_wakeup = pd_active_wakeup;
90	genpd->power_off = pd_power_down;
91	genpd->power_on = pd_power_up;
92
93	if (pd_is_off(&r8a7779_pd->genpd))
94		pd_power_up(&r8a7779_pd->genpd);
95}
96
97static struct r8a7779_pm_domain r8a7779_pm_domains[] = {
98	{
99		.genpd.name = "SH4A",
100		.ch = {
101			.chan_offs = 0x80, /* PWRSR1 .. PWRER1 */
102			.isr_bit = 16, /* SH4A */
103		},
104	},
105	{
106		.genpd.name = "SGX",
107		.ch = {
108			.chan_offs = 0xc0, /* PWRSR2 .. PWRER2 */
109			.isr_bit = 20, /* SGX */
110		},
111	},
112	{
113		.genpd.name = "VDP1",
114		.ch = {
115			.chan_offs = 0x100, /* PWRSR3 .. PWRER3 */
116			.isr_bit = 21, /* VDP */
117		},
118	},
119	{
120		.genpd.name = "IMPX3",
121		.ch = {
122			.chan_offs = 0x140, /* PWRSR4 .. PWRER4 */
123			.isr_bit = 24, /* IMP */
124		},
125	},
126};
127
128void __init r8a7779_init_pm_domains(void)
129{
130	int j;
131
132	for (j = 0; j < ARRAY_SIZE(r8a7779_pm_domains); j++)
133		r8a7779_init_pm_domain(&r8a7779_pm_domains[j]);
134}
135
136#endif /* CONFIG_PM */
137
138void __init r8a7779_pm_init(void)
139{
140	static int once;
141
142	if (!once++)
143		r8a7779_sysc_init();
144}
145