/* * arch/arm/plat-omap/include/mach/clockdomain.h * * OMAP2/3 clockdomain framework functions * * Copyright (C) 2008 Texas Instruments, Inc. * Copyright (C) 2008-2011 Nokia Corporation * * 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 __ARCH_ARM_MACH_OMAP2_CLOCKDOMAIN_H #define __ARCH_ARM_MACH_OMAP2_CLOCKDOMAIN_H #include <linux/init.h> #include <linux/spinlock.h> #include "powerdomain.h" #include <plat/clock.h> #include <plat/omap_hwmod.h> #include <plat/cpu.h> /* * Clockdomain flags * * XXX Document CLKDM_CAN_* flags * * CLKDM_NO_AUTODEPS: Prevent "autodeps" from being added/removed from this * clockdomain. (Currently, this applies to OMAP3 clockdomains only.) */ #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_NO_AUTODEPS (1 << 4) #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) /** * struct clkdm_autodep - clkdm deps to add when entering/exiting hwsup mode * @clkdm: clockdomain to add wkdep+sleepdep on - set name member only * * 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. * * Autodeps are deprecated and should be removed after * omap_hwmod-based fine-grained module idle control is added. */ struct clkdm_autodep { union { const char *name; struct clockdomain *ptr; } clkdm; }; /** * struct clkdm_dep - encode dependencies between clockdomains * @clkdm_name: clockdomain name * @clkdm: pointer to the struct clockdomain of @clkdm_name * @wkdep_usecount: Number of wakeup dependencies causing this clkdm to wake * @sleepdep_usecount: Number of sleep deps that could prevent clkdm from idle * * Statically defined. @clkdm is resolved from @clkdm_name at runtime and * should not be pre-initialized. * * XXX Should also include hardware (fixed) dependencies. */ struct clkdm_dep { const char *clkdm_name; struct clockdomain *clkdm; atomic_t wkdep_usecount; atomic_t sleepdep_usecount; }; /* Possible flags for struct clockdomain._flags */ #define _CLKDM_FLAG_HWSUP_ENABLED BIT(0) /** * struct clockdomain - OMAP clockdomain * @name: clockdomain name * @pwrdm: powerdomain containing this clockdomain * @clktrctrl_reg: CLKSTCTRL reg for the given clock domain * @clktrctrl_mask: CLKTRCTRL/AUTOSTATE field mask in CM_CLKSTCTRL reg * @flags: Clockdomain capability flags * @_flags: Flags for use only by internal clockdomain code * @dep_bit: Bit shift of this clockdomain's PM_WKDEP/CM_SLEEPDEP bit * @prcm_partition: (OMAP4 only) PRCM partition ID for this clkdm's registers * @cm_inst: (OMAP4 only) CM instance register offset * @clkdm_offs: (OMAP4 only) CM clockdomain register offset * @wkdep_srcs: Clockdomains that can be told to wake this powerdomain up * @sleepdep_srcs: Clockdomains that can be told to keep this clkdm from inact * @usecount: Usecount tracking * @node: list_head to link all clockdomains together * * @prcm_partition should be a macro from mach-omap2/prcm44xx.h (OMAP4 only) * @cm_inst should be a macro ending in _INST from the OMAP4 CM instance * definitions (OMAP4 only) * @clkdm_offs should be a macro ending in _CDOFFS from the OMAP4 CM instance * definitions (OMAP4 only) */ struct clockdomain { const char *name; union { const char *name; struct powerdomain *ptr; } pwrdm; const u16 clktrctrl_mask; const u8 flags; u8 _flags; const u8 dep_bit; const u8 prcm_partition; const s16 cm_inst; const u16 clkdm_offs; struct clkdm_dep *wkdep_srcs; struct clkdm_dep *sleepdep_srcs; atomic_t usecount; struct list_head node; spinlock_t lock; }; /** * struct clkdm_ops - Arch specific function implementations * @clkdm_add_wkdep: Add a wakeup dependency between clk domains * @clkdm_del_wkdep: Delete a wakeup dependency between clk domains * @clkdm_read_wkdep: Read wakeup dependency state between clk domains * @clkdm_clear_all_wkdeps: Remove all wakeup dependencies from the clk domain * @clkdm_add_sleepdep: Add a sleep dependency between clk domains * @clkdm_del_sleepdep: Delete a sleep dependency between clk domains * @clkdm_read_sleepdep: Read sleep dependency state between clk domains * @clkdm_clear_all_sleepdeps: Remove all sleep dependencies from the clk domain * @clkdm_sleep: Force a clockdomain to sleep * @clkdm_wakeup: Force a clockdomain to wakeup * @clkdm_allow_idle: Enable hw supervised idle transitions for clock domain * @clkdm_deny_idle: Disable hw supervised idle transitions for clock domain * @clkdm_clk_enable: Put the clkdm in right state for a clock enable * @clkdm_clk_disable: Put the clkdm in right state for a clock disable */ struct clkdm_ops { 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_clear_all_wkdeps)(struct clockdomain *clkdm); 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); int (*clkdm_clear_all_sleepdeps)(struct clockdomain *clkdm); int (*clkdm_sleep)(struct clockdomain *clkdm); int (*clkdm_wakeup)(struct clockdomain *clkdm); void (*clkdm_allow_idle)(struct clockdomain *clkdm); void (*clkdm_deny_idle)(struct clockdomain *clkdm); int (*clkdm_clk_enable)(struct clockdomain *clkdm); int (*clkdm_clk_disable)(struct clockdomain *clkdm); }; int clkdm_register_platform_funcs(struct clkdm_ops *co); int clkdm_register_autodeps(struct clkdm_autodep *ia); int clkdm_register_clkdms(struct clockdomain **c); int clkdm_complete_init(void); 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_clear_all_wkdeps(struct clockdomain *clkdm); 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); int clkdm_clear_all_sleepdeps(struct clockdomain *clkdm); void clkdm_allow_idle(struct clockdomain *clkdm); void clkdm_deny_idle(struct clockdomain *clkdm); bool clkdm_in_hwsup(struct clockdomain *clkdm); int clkdm_wakeup(struct clockdomain *clkdm); int clkdm_sleep(struct clockdomain *clkdm); int clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk); int clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk); int clkdm_hwmod_enable(struct clockdomain *clkdm, struct omap_hwmod *oh); int clkdm_hwmod_disable(struct clockdomain *clkdm, struct omap_hwmod *oh); extern void __init omap242x_clockdomains_init(void); extern void __init omap243x_clockdomains_init(void); extern void __init omap3xxx_clockdomains_init(void); extern void __init omap44xx_clockdomains_init(void); extern void _clkdm_add_autodeps(struct clockdomain *clkdm); extern void _clkdm_del_autodeps(struct clockdomain *clkdm); extern struct clkdm_ops omap2_clkdm_operations; extern struct clkdm_ops omap3_clkdm_operations; extern struct clkdm_ops omap4_clkdm_operations; extern struct clkdm_dep gfx_24xx_wkdeps[]; extern struct clkdm_dep dsp_24xx_wkdeps[]; extern struct clockdomain wkup_common_clkdm; extern struct clockdomain prm_common_clkdm; extern struct clockdomain cm_common_clkdm; #endif