250 lines
10 KiB
C
250 lines
10 KiB
C
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/*
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* OMAP2/3 clockdomain framework functions
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*
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* Copyright (C) 2008, 2012 Texas Instruments, Inc.
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* Copyright (C) 2008-2011 Nokia Corporation
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*
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* Paul Walmsley
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ARCH_ARM_MACH_OMAP2_CLOCKDOMAIN_H
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#define __ARCH_ARM_MACH_OMAP2_CLOCKDOMAIN_H
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#include <linux/init.h>
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#include "powerdomain.h"
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#include "clock.h"
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/*
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* Clockdomain flags
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*
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* XXX Document CLKDM_CAN_* flags
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*
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* CLKDM_NO_AUTODEPS: Prevent "autodeps" from being added/removed from this
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* clockdomain. (Currently, this applies to OMAP3 clockdomains only.)
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* CLKDM_ACTIVE_WITH_MPU: The PRCM guarantees that this clockdomain is
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* active whenever the MPU is active. True for interconnects and
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* the WKUP clockdomains.
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* CLKDM_MISSING_IDLE_REPORTING: The idle status of the IP blocks and
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* clocks inside this clockdomain are not taken into account by
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* the PRCM when determining whether the clockdomain is idle.
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* Without this flag, if the clockdomain is set to
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* hardware-supervised idle mode, the PRCM may transition the
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* enclosing powerdomain to a low power state, even when devices
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* inside the clockdomain and powerdomain are in use. (An example
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* of such a clockdomain is the EMU clockdomain on OMAP3/4.) If
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* this flag is set, and the clockdomain does not support the
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* force-sleep mode, then the HW_AUTO mode will be used to put the
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* clockdomain to sleep. Similarly, if the clockdomain supports
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* the force-wakeup mode, then it will be used whenever a clock or
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* IP block inside the clockdomain is active, rather than the
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* HW_AUTO mode.
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*/
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#define CLKDM_CAN_FORCE_SLEEP (1 << 0)
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#define CLKDM_CAN_FORCE_WAKEUP (1 << 1)
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#define CLKDM_CAN_ENABLE_AUTO (1 << 2)
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#define CLKDM_CAN_DISABLE_AUTO (1 << 3)
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#define CLKDM_NO_AUTODEPS (1 << 4)
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#define CLKDM_ACTIVE_WITH_MPU (1 << 5)
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#define CLKDM_MISSING_IDLE_REPORTING (1 << 6)
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#define CLKDM_CAN_HWSUP (CLKDM_CAN_ENABLE_AUTO | CLKDM_CAN_DISABLE_AUTO)
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#define CLKDM_CAN_SWSUP (CLKDM_CAN_FORCE_SLEEP | CLKDM_CAN_FORCE_WAKEUP)
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#define CLKDM_CAN_HWSUP_SWSUP (CLKDM_CAN_SWSUP | CLKDM_CAN_HWSUP)
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/**
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* struct clkdm_autodep - clkdm deps to add when entering/exiting hwsup mode
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* @clkdm: clockdomain to add wkdep+sleepdep on - set name member only
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*
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* A clockdomain that should have wkdeps and sleepdeps added when a
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* clockdomain should stay active in hwsup mode; and conversely,
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* removed when the clockdomain should be allowed to go inactive in
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* hwsup mode.
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*
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* Autodeps are deprecated and should be removed after
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* omap_hwmod-based fine-grained module idle control is added.
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*/
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struct clkdm_autodep {
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union {
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const char *name;
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struct clockdomain *ptr;
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} clkdm;
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};
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/**
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* struct clkdm_dep - encode dependencies between clockdomains
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* @clkdm_name: clockdomain name
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* @clkdm: pointer to the struct clockdomain of @clkdm_name
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* @wkdep_usecount: Number of wakeup dependencies causing this clkdm to wake
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* @sleepdep_usecount: Number of sleep deps that could prevent clkdm from idle
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*
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* Statically defined. @clkdm is resolved from @clkdm_name at runtime and
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* should not be pre-initialized.
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*
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* XXX Should also include hardware (fixed) dependencies.
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*/
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struct clkdm_dep {
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const char *clkdm_name;
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struct clockdomain *clkdm;
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s16 wkdep_usecount;
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s16 sleepdep_usecount;
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};
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/* Possible flags for struct clockdomain._flags */
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#define _CLKDM_FLAG_HWSUP_ENABLED BIT(0)
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struct omap_hwmod;
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/**
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* struct clockdomain - OMAP clockdomain
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* @name: clockdomain name
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* @pwrdm: powerdomain containing this clockdomain
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* @clktrctrl_reg: CLKSTCTRL reg for the given clock domain
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* @clktrctrl_mask: CLKTRCTRL/AUTOSTATE field mask in CM_CLKSTCTRL reg
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* @flags: Clockdomain capability flags
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* @_flags: Flags for use only by internal clockdomain code
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* @dep_bit: Bit shift of this clockdomain's PM_WKDEP/CM_SLEEPDEP bit
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* @prcm_partition: (OMAP4 only) PRCM partition ID for this clkdm's registers
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* @cm_inst: (OMAP4 only) CM instance register offset
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* @clkdm_offs: (OMAP4 only) CM clockdomain register offset
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* @wkdep_srcs: Clockdomains that can be told to wake this powerdomain up
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* @sleepdep_srcs: Clockdomains that can be told to keep this clkdm from inact
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* @usecount: Usecount tracking
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* @forcewake_count: Usecount for forcing the domain active
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* @node: list_head to link all clockdomains together
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*
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* @prcm_partition should be a macro from mach-omap2/prcm44xx.h (OMAP4 only)
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* @cm_inst should be a macro ending in _INST from the OMAP4 CM instance
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* definitions (OMAP4 only)
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* @clkdm_offs should be a macro ending in _CDOFFS from the OMAP4 CM instance
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* definitions (OMAP4 only)
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*/
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struct clockdomain {
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const char *name;
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union {
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const char *name;
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struct powerdomain *ptr;
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} pwrdm;
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const u16 clktrctrl_mask;
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const u8 flags;
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u8 _flags;
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const u8 dep_bit;
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const u8 prcm_partition;
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const u16 cm_inst;
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const u16 clkdm_offs;
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struct clkdm_dep *wkdep_srcs;
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struct clkdm_dep *sleepdep_srcs;
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int usecount;
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int forcewake_count;
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struct list_head node;
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u32 context;
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};
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/**
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* struct clkdm_ops - Arch specific function implementations
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* @clkdm_add_wkdep: Add a wakeup dependency between clk domains
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* @clkdm_del_wkdep: Delete a wakeup dependency between clk domains
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* @clkdm_read_wkdep: Read wakeup dependency state between clk domains
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* @clkdm_clear_all_wkdeps: Remove all wakeup dependencies from the clk domain
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* @clkdm_add_sleepdep: Add a sleep dependency between clk domains
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* @clkdm_del_sleepdep: Delete a sleep dependency between clk domains
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* @clkdm_read_sleepdep: Read sleep dependency state between clk domains
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* @clkdm_clear_all_sleepdeps: Remove all sleep dependencies from the clk domain
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* @clkdm_sleep: Force a clockdomain to sleep
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* @clkdm_wakeup: Force a clockdomain to wakeup
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* @clkdm_allow_idle: Enable hw supervised idle transitions for clock domain
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* @clkdm_deny_idle: Disable hw supervised idle transitions for clock domain
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* @clkdm_clk_enable: Put the clkdm in right state for a clock enable
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* @clkdm_clk_disable: Put the clkdm in right state for a clock disable
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* @clkdm_save_context: Save the current clkdm context
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* @clkdm_restore_context: Restore the clkdm context
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*/
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struct clkdm_ops {
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int (*clkdm_add_wkdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int (*clkdm_del_wkdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int (*clkdm_read_wkdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int (*clkdm_clear_all_wkdeps)(struct clockdomain *clkdm);
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int (*clkdm_add_sleepdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int (*clkdm_del_sleepdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int (*clkdm_read_sleepdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int (*clkdm_clear_all_sleepdeps)(struct clockdomain *clkdm);
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int (*clkdm_sleep)(struct clockdomain *clkdm);
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int (*clkdm_wakeup)(struct clockdomain *clkdm);
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void (*clkdm_allow_idle)(struct clockdomain *clkdm);
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void (*clkdm_deny_idle)(struct clockdomain *clkdm);
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int (*clkdm_clk_enable)(struct clockdomain *clkdm);
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int (*clkdm_clk_disable)(struct clockdomain *clkdm);
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int (*clkdm_save_context)(struct clockdomain *clkdm);
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int (*clkdm_restore_context)(struct clockdomain *clkdm);
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};
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int clkdm_register_platform_funcs(struct clkdm_ops *co);
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int clkdm_register_autodeps(struct clkdm_autodep *ia);
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int clkdm_register_clkdms(struct clockdomain **c);
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int clkdm_complete_init(void);
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struct clockdomain *clkdm_lookup(const char *name);
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int clkdm_for_each(int (*fn)(struct clockdomain *clkdm, void *user),
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void *user);
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struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm);
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int clkdm_add_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int clkdm_del_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int clkdm_read_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int clkdm_clear_all_wkdeps(struct clockdomain *clkdm);
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int clkdm_add_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int clkdm_del_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int clkdm_read_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int clkdm_clear_all_sleepdeps(struct clockdomain *clkdm);
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void clkdm_allow_idle_nolock(struct clockdomain *clkdm);
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void clkdm_allow_idle(struct clockdomain *clkdm);
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void clkdm_deny_idle_nolock(struct clockdomain *clkdm);
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void clkdm_deny_idle(struct clockdomain *clkdm);
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bool clkdm_in_hwsup(struct clockdomain *clkdm);
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bool clkdm_missing_idle_reporting(struct clockdomain *clkdm);
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int clkdm_wakeup_nolock(struct clockdomain *clkdm);
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int clkdm_wakeup(struct clockdomain *clkdm);
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int clkdm_sleep_nolock(struct clockdomain *clkdm);
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int clkdm_sleep(struct clockdomain *clkdm);
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int clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk);
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int clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk);
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int clkdm_hwmod_enable(struct clockdomain *clkdm, struct omap_hwmod *oh);
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int clkdm_hwmod_disable(struct clockdomain *clkdm, struct omap_hwmod *oh);
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void clkdm_save_context(void);
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void clkdm_restore_context(void);
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extern void __init omap242x_clockdomains_init(void);
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extern void __init omap243x_clockdomains_init(void);
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extern void __init omap3xxx_clockdomains_init(void);
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extern void __init am33xx_clockdomains_init(void);
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extern void __init ti814x_clockdomains_init(void);
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extern void __init ti816x_clockdomains_init(void);
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extern void __init omap44xx_clockdomains_init(void);
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extern void __init omap54xx_clockdomains_init(void);
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extern void __init dra7xx_clockdomains_init(void);
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void am43xx_clockdomains_init(void);
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extern void clkdm_add_autodeps(struct clockdomain *clkdm);
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extern void clkdm_del_autodeps(struct clockdomain *clkdm);
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extern struct clkdm_ops omap2_clkdm_operations;
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extern struct clkdm_ops omap3_clkdm_operations;
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extern struct clkdm_ops omap4_clkdm_operations;
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extern struct clkdm_ops am33xx_clkdm_operations;
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extern struct clkdm_ops am43xx_clkdm_operations;
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extern struct clkdm_dep gfx_24xx_wkdeps[];
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extern struct clkdm_dep dsp_24xx_wkdeps[];
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extern struct clockdomain wkup_common_clkdm;
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#endif
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