projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| a662c082 MD |
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/platform_device.h> | |
| 17 | #include <linux/delay.h> | |
| 18 | #include <linux/irq.h> | |
| 19 | #include <linux/interrupt.h> | |
| 20 | #include <linux/console.h> | |
| a662c082 | 21 | #include <asm/io.h> |
| a6557eb7 | 22 | #include <mach/pm-rcar.h> |
| a662c082 | 23 | #include <mach/r8a7779.h> |
| fd44aa5e | 24 | #include "common.h" |
| a662c082 | 25 | |
| a662c082 | 26 | /* SYSC */ |
| a662c082 MD |
27 | #define SYSCIER 0x0c |
| 28 | #define SYSCIMR 0x10 | |
| a662c082 | 29 | |
| f40aaf6d MD |
30 | #if defined(CONFIG_PM) || defined(CONFIG_SMP) |
| 31 | ||
| a662c082 MD |
32 | static void __init r8a7779_sysc_init(void) |
| 33 | { | |
| a6557eb7 | 34 | void __iomem *base = rcar_sysc_init(0xffd85000); |
| a662c082 MD |
35 | |
| 36 | /* enable all interrupt sources, but do not use interrupt handler */ | |
| a6557eb7 MD |
37 | iowrite32(0x0131000e, base + SYSCIER); |
| 38 | iowrite32(0, base + SYSCIMR); | |
| a662c082 MD |
39 | } |
| 40 | ||
| f40aaf6d MD |
41 | #else /* CONFIG_PM || CONFIG_SMP */ |
| 42 | ||
| 43 | static inline void r8a7779_sysc_init(void) {} | |
| 44 | ||
| 45 | #endif /* CONFIG_PM || CONFIG_SMP */ | |
| 46 | ||
| 47 | #ifdef CONFIG_PM | |
| 48 | ||
| a662c082 MD |
49 | static int pd_power_down(struct generic_pm_domain *genpd) |
| 50 | { | |
| a6557eb7 | 51 | return rcar_sysc_power_down(to_r8a7779_ch(genpd)); |
| a662c082 MD |
52 | } |
| 53 | ||
| 54 | static int pd_power_up(struct generic_pm_domain *genpd) | |
| 55 | { | |
| a6557eb7 | 56 | return rcar_sysc_power_up(to_r8a7779_ch(genpd)); |
| a662c082 MD |
57 | } |
| 58 | ||
| 59 | static bool pd_is_off(struct generic_pm_domain *genpd) | |
| 60 | { | |
| a6557eb7 | 61 | return rcar_sysc_power_is_off(to_r8a7779_ch(genpd)); |
| a662c082 MD |
62 | } |
| 63 | ||
| 64 | static bool pd_active_wakeup(struct device *dev) | |
| 65 | { | |
| 66 | return true; | |
| 67 | } | |
| 68 | ||
| 45e5ca57 | 69 | static void r8a7779_init_pm_domain(struct r8a7779_pm_domain *r8a7779_pd) |
| a662c082 MD |
70 | { |
| 71 | struct generic_pm_domain *genpd = &r8a7779_pd->genpd; | |
| 72 | ||
| 73 | pm_genpd_init(genpd, NULL, false); | |
| 74 | genpd->dev_ops.stop = pm_clk_suspend; | |
| 75 | genpd->dev_ops.start = pm_clk_resume; | |
| 76 | genpd->dev_ops.active_wakeup = pd_active_wakeup; | |
| 77 | genpd->dev_irq_safe = true; | |
| 78 | genpd->power_off = pd_power_down; | |
| 79 | genpd->power_on = pd_power_up; | |
| 80 | ||
| 81 | if (pd_is_off(&r8a7779_pd->genpd)) | |
| 82 | pd_power_up(&r8a7779_pd->genpd); | |
| 83 | } | |
| 84 | ||
| 45e5ca57 RW |
85 | static struct r8a7779_pm_domain r8a7779_pm_domains[] = { |
| 86 | { | |
| 87 | .genpd.name = "SH4A", | |
| 88 | .ch = { | |
| 89 | .chan_offs = 0x80, /* PWRSR1 .. PWRER1 */ | |
| 90 | .isr_bit = 16, /* SH4A */ | |
| 91 | }, | |
| 92 | }, | |
| 93 | { | |
| 94 | .genpd.name = "SGX", | |
| 95 | .ch = { | |
| 96 | .chan_offs = 0xc0, /* PWRSR2 .. PWRER2 */ | |
| 97 | .isr_bit = 20, /* SGX */ | |
| 98 | }, | |
| 99 | }, | |
| 100 | { | |
| 101 | .genpd.name = "VDP1", | |
| 102 | .ch = { | |
| 103 | .chan_offs = 0x100, /* PWRSR3 .. PWRER3 */ | |
| 104 | .isr_bit = 21, /* VDP */ | |
| 105 | }, | |
| 106 | }, | |
| 107 | { | |
| 108 | .genpd.name = "IMPX3", | |
| 109 | .ch = { | |
| 110 | .chan_offs = 0x140, /* PWRSR4 .. PWRER4 */ | |
| 111 | .isr_bit = 24, /* IMP */ | |
| 112 | }, | |
| 113 | }, | |
| a662c082 MD |
114 | }; |
| 115 | ||
| 45e5ca57 RW |
116 | void __init r8a7779_init_pm_domains(void) |
| 117 | { | |
| 118 | int j; | |
| a662c082 | 119 | |
| 45e5ca57 RW |
120 | for (j = 0; j < ARRAY_SIZE(r8a7779_pm_domains); j++) |
| 121 | r8a7779_init_pm_domain(&r8a7779_pm_domains[j]); | |
| 122 | } | |
| a662c082 | 123 | |
| a662c082 MD |
124 | #endif /* CONFIG_PM */ |
| 125 | ||
| 126 | void __init r8a7779_pm_init(void) | |
| 127 | { | |
| f40aaf6d MD |
128 | static int once; |
| 129 | ||
| 130 | if (!once++) | |
| 131 | r8a7779_sysc_init(); | |
| a662c082 | 132 | } |