145 lines
3 KiB
C
145 lines
3 KiB
C
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/*
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* r8a7779 Power management support
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*
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* Copyright (C) 2011 Renesas Solutions Corp.
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* Copyright (C) 2011 Magnus Damm
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/pm.h>
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#include <linux/suspend.h>
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#include <linux/err.h>
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#include <linux/pm_clock.h>
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#include <linux/pm_domain.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/console.h>
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#include <asm/io.h>
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#include "common.h"
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#include "pm-rcar.h"
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#include "r8a7779.h"
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/* SYSC */
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#define SYSCIER 0x0c
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#define SYSCIMR 0x10
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struct r8a7779_pm_domain {
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struct generic_pm_domain genpd;
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struct rcar_sysc_ch ch;
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};
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static inline struct rcar_sysc_ch *to_r8a7779_ch(struct generic_pm_domain *d)
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{
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return &container_of(d, struct r8a7779_pm_domain, genpd)->ch;
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}
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#if defined(CONFIG_PM) || defined(CONFIG_SMP)
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static void __init r8a7779_sysc_init(void)
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{
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void __iomem *base = rcar_sysc_init(0xffd85000);
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/* enable all interrupt sources, but do not use interrupt handler */
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iowrite32(0x0131000e, base + SYSCIER);
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iowrite32(0, base + SYSCIMR);
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}
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#else /* CONFIG_PM || CONFIG_SMP */
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static inline void r8a7779_sysc_init(void) {}
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#endif /* CONFIG_PM || CONFIG_SMP */
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#ifdef CONFIG_PM
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static int pd_power_down(struct generic_pm_domain *genpd)
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{
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return rcar_sysc_power_down(to_r8a7779_ch(genpd));
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}
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static int pd_power_up(struct generic_pm_domain *genpd)
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{
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return rcar_sysc_power_up(to_r8a7779_ch(genpd));
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}
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static bool pd_is_off(struct generic_pm_domain *genpd)
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{
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return rcar_sysc_power_is_off(to_r8a7779_ch(genpd));
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}
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static bool pd_active_wakeup(struct device *dev)
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{
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return true;
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}
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static void r8a7779_init_pm_domain(struct r8a7779_pm_domain *r8a7779_pd)
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{
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struct generic_pm_domain *genpd = &r8a7779_pd->genpd;
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pm_genpd_init(genpd, NULL, false);
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genpd->dev_ops.stop = pm_clk_suspend;
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genpd->dev_ops.start = pm_clk_resume;
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genpd->dev_ops.active_wakeup = pd_active_wakeup;
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genpd->power_off = pd_power_down;
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genpd->power_on = pd_power_up;
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if (pd_is_off(&r8a7779_pd->genpd))
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pd_power_up(&r8a7779_pd->genpd);
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}
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static struct r8a7779_pm_domain r8a7779_pm_domains[] = {
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{
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.genpd.name = "SH4A",
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.ch = {
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.chan_offs = 0x80, /* PWRSR1 .. PWRER1 */
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.isr_bit = 16, /* SH4A */
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},
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},
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{
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.genpd.name = "SGX",
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.ch = {
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.chan_offs = 0xc0, /* PWRSR2 .. PWRER2 */
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.isr_bit = 20, /* SGX */
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},
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},
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{
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.genpd.name = "VDP1",
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.ch = {
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.chan_offs = 0x100, /* PWRSR3 .. PWRER3 */
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.isr_bit = 21, /* VDP */
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},
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},
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{
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.genpd.name = "IMPX3",
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.ch = {
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.chan_offs = 0x140, /* PWRSR4 .. PWRER4 */
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.isr_bit = 24, /* IMP */
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},
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},
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};
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void __init r8a7779_init_pm_domains(void)
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{
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int j;
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for (j = 0; j < ARRAY_SIZE(r8a7779_pm_domains); j++)
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r8a7779_init_pm_domain(&r8a7779_pm_domains[j]);
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}
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#endif /* CONFIG_PM */
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void __init r8a7779_pm_init(void)
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{
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static int once;
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if (!once++)
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r8a7779_sysc_init();
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}
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