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