| /* |
| * 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 "common.h" |
| #include "pm-rcar.h" |
| #include "r8a7779.h" |
| |
| /* SYSC */ |
| #define SYSCIER 0x0c |
| #define SYSCIMR 0x10 |
| |
| struct r8a7779_pm_domain { |
| struct generic_pm_domain genpd; |
| struct rcar_sysc_ch ch; |
| }; |
| |
| static inline |
| const 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.active_wakeup = pd_active_wakeup; |
| 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(); |
| } |