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/*
* arch/arm/plat-omap/include/mach/clockdomain.h
*
* OMAP2/3 clockdomain framework functions
*
* Copyright (C) 2008 Texas Instruments, Inc.
* Copyright (C) 2008-2009 Nokia Corporation
*
* Written by Paul Walmsley
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARM_ARCH_OMAP_CLOCKDOMAIN_H
#define __ASM_ARM_ARCH_OMAP_CLOCKDOMAIN_H
#include <plat/powerdomain.h>
#include <plat/clock.h>
#include <plat/cpu.h>
/* Clockdomain capability flags */
#define CLKDM_CAN_FORCE_SLEEP (1 << 0)
#define CLKDM_CAN_FORCE_WAKEUP (1 << 1)
#define CLKDM_CAN_ENABLE_AUTO (1 << 2)
#define CLKDM_CAN_DISABLE_AUTO (1 << 3)
#define CLKDM_CAN_HWSUP (CLKDM_CAN_ENABLE_AUTO | CLKDM_CAN_DISABLE_AUTO)
#define CLKDM_CAN_SWSUP (CLKDM_CAN_FORCE_SLEEP | CLKDM_CAN_FORCE_WAKEUP)
#define CLKDM_CAN_HWSUP_SWSUP (CLKDM_CAN_SWSUP | CLKDM_CAN_HWSUP)
/* OMAP24XX CM_CLKSTCTRL_*.AUTOSTATE_* register bit values */
#define OMAP24XX_CLKSTCTRL_DISABLE_AUTO 0x0
#define OMAP24XX_CLKSTCTRL_ENABLE_AUTO 0x1
/* OMAP3XXX CM_CLKSTCTRL_*.CLKTRCTRL_* register bit values */
#define OMAP34XX_CLKSTCTRL_DISABLE_AUTO 0x0
#define OMAP34XX_CLKSTCTRL_FORCE_SLEEP 0x1
#define OMAP34XX_CLKSTCTRL_FORCE_WAKEUP 0x2
#define OMAP34XX_CLKSTCTRL_ENABLE_AUTO 0x3
/*
* struct clkdm_autodep - a clockdomain that should have wkdeps
* and sleepdeps added when a clockdomain should stay active in hwsup mode;
* and conversely, removed when the clockdomain should be allowed to go
* inactive in hwsup mode.
*/
struct clkdm_autodep {
union {
/* Name of the clockdomain to add a wkdep/sleepdep on */
const char *name;
/* Clockdomain pointer (looked up at clkdm_init() time) */
struct clockdomain *ptr;
} clkdm;
/* OMAP chip types that this clockdomain dep is valid on */
const struct omap_chip_id omap_chip;
};
/* Encodes dependencies between clockdomains - statically defined */
struct clkdm_dep {
/* Clockdomain name */
const char *clkdm_name;
/* Clockdomain pointer - resolved by the clockdomain code */
struct clockdomain *clkdm;
/* Flags to mark OMAP chip restrictions, etc. */
const struct omap_chip_id omap_chip;
};
struct clockdomain {
/* Clockdomain name */
const char *name;
union {
/* Powerdomain enclosing this clockdomain */
const char *name;
/* Powerdomain pointer assigned at clkdm_register() */
struct powerdomain *ptr;
} pwrdm;
/* CLKSTCTRL reg for the given clock domain*/
void __iomem *clkstctrl_reg;
/* CLKTRCTRL/AUTOSTATE field mask in CM_CLKSTCTRL reg */
const u16 clktrctrl_mask;
/* Clockdomain capability flags */
const u8 flags;
/* Bit shift of this clockdomain's PM_WKDEP/CM_SLEEPDEP bit */
const u8 dep_bit;
/* Clockdomains that can be told to wake this powerdomain up */
struct clkdm_dep *wkdep_srcs;
/* Clockdomains that can be told to keep this clkdm from inactivity */
struct clkdm_dep *sleepdep_srcs;
/* OMAP chip types that this clockdomain is valid on */
const struct omap_chip_id omap_chip;
/* Usecount tracking */
atomic_t usecount;
struct list_head node;
};
void clkdm_init(struct clockdomain **clkdms, struct clkdm_autodep *autodeps);
int clkdm_register(struct clockdomain *clkdm);
int clkdm_unregister(struct clockdomain *clkdm);
struct clockdomain *clkdm_lookup(const char *name);
int clkdm_for_each(int (*fn)(struct clockdomain *clkdm, void *user),
void *user);
struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm);
int clkdm_add_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
int clkdm_del_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
int clkdm_read_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
int clkdm_add_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
int clkdm_del_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
int clkdm_read_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
void omap2_clkdm_allow_idle(struct clockdomain *clkdm);
void omap2_clkdm_deny_idle(struct clockdomain *clkdm);
int omap2_clkdm_wakeup(struct clockdomain *clkdm);
int omap2_clkdm_sleep(struct clockdomain *clkdm);
int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk);
int omap2_clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk);
#endif
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