284 lines
11 KiB
C
284 lines
11 KiB
C
|
/*
|
||
|
|
* OMAP2/3/4 powerdomain control
|
||
|
|
*
|
||
|
|
* Copyright (C) 2007-2008, 2010 Texas Instruments, Inc.
|
||
|
|
* Copyright (C) 2007-2011 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.
|
||
|
|
*
|
||
|
|
* XXX This should be moved to the mach-omap2/ directory at the earliest
|
||
|
|
* opportunity.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __ARCH_ARM_MACH_OMAP2_POWERDOMAIN_H
|
||
|
|
#define __ARCH_ARM_MACH_OMAP2_POWERDOMAIN_H
|
||
|
|
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/list.h>
|
||
|
|
#include <linux/spinlock.h>
|
||
|
|
|
||
|
|
/* Powerdomain basic power states */
|
||
|
|
#define PWRDM_POWER_OFF 0x0
|
||
|
|
#define PWRDM_POWER_RET 0x1
|
||
|
|
#define PWRDM_POWER_INACTIVE 0x2
|
||
|
|
#define PWRDM_POWER_ON 0x3
|
||
|
|
|
||
|
|
#define PWRDM_MAX_PWRSTS 4
|
||
|
|
|
||
|
|
/* Powerdomain allowable state bitfields */
|
||
|
|
#define PWRSTS_ON (1 << PWRDM_POWER_ON)
|
||
|
|
#define PWRSTS_INACTIVE (1 << PWRDM_POWER_INACTIVE)
|
||
|
|
#define PWRSTS_RET (1 << PWRDM_POWER_RET)
|
||
|
|
#define PWRSTS_OFF (1 << PWRDM_POWER_OFF)
|
||
|
|
|
||
|
|
#define PWRSTS_OFF_ON (PWRSTS_OFF | PWRSTS_ON)
|
||
|
|
#define PWRSTS_OFF_RET (PWRSTS_OFF | PWRSTS_RET)
|
||
|
|
#define PWRSTS_RET_ON (PWRSTS_RET | PWRSTS_ON)
|
||
|
|
#define PWRSTS_OFF_RET_ON (PWRSTS_OFF_RET | PWRSTS_ON)
|
||
|
|
#define PWRSTS_INA_ON (PWRSTS_INACTIVE | PWRSTS_ON)
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Powerdomain flags (struct powerdomain.flags)
|
||
|
|
*
|
||
|
|
* PWRDM_HAS_HDWR_SAR - powerdomain has hardware save-and-restore support
|
||
|
|
*
|
||
|
|
* PWRDM_HAS_MPU_QUIRK - MPU pwr domain has MEM bank 0 bits in MEM
|
||
|
|
* bank 1 position. This is true for OMAP3430
|
||
|
|
*
|
||
|
|
* PWRDM_HAS_LOWPOWERSTATECHANGE - can transition from a sleep state
|
||
|
|
* to a lower sleep state without waking up the powerdomain
|
||
|
|
*/
|
||
|
|
#define PWRDM_HAS_HDWR_SAR BIT(0)
|
||
|
|
#define PWRDM_HAS_MPU_QUIRK BIT(1)
|
||
|
|
#define PWRDM_HAS_LOWPOWERSTATECHANGE BIT(2)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Number of memory banks that are power-controllable. On OMAP4430, the
|
||
|
|
* maximum is 5.
|
||
|
|
*/
|
||
|
|
#define PWRDM_MAX_MEM_BANKS 5
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Maximum number of clockdomains that can be associated with a powerdomain.
|
||
|
|
* PER powerdomain on AM33XX is the worst case
|
||
|
|
*/
|
||
|
|
#define PWRDM_MAX_CLKDMS 11
|
||
|
|
|
||
|
|
/* XXX A completely arbitrary number. What is reasonable here? */
|
||
|
|
#define PWRDM_TRANSITION_BAILOUT 100000
|
||
|
|
|
||
|
|
struct clockdomain;
|
||
|
|
struct powerdomain;
|
||
|
|
struct voltagedomain;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct powerdomain - OMAP powerdomain
|
||
|
|
* @name: Powerdomain name
|
||
|
|
* @voltdm: voltagedomain containing this powerdomain
|
||
|
|
* @prcm_offs: the address offset from CM_BASE/PRM_BASE
|
||
|
|
* @prcm_partition: (OMAP4 only) the PRCM partition ID containing @prcm_offs
|
||
|
|
* @pwrsts: Possible powerdomain power states
|
||
|
|
* @pwrsts_logic_ret: Possible logic power states when pwrdm in RETENTION
|
||
|
|
* @flags: Powerdomain flags
|
||
|
|
* @banks: Number of software-controllable memory banks in this powerdomain
|
||
|
|
* @pwrsts_mem_ret: Possible memory bank pwrstates when pwrdm in RETENTION
|
||
|
|
* @pwrsts_mem_on: Possible memory bank pwrstates when pwrdm in ON
|
||
|
|
* @pwrdm_clkdms: Clockdomains in this powerdomain
|
||
|
|
* @node: list_head linking all powerdomains
|
||
|
|
* @voltdm_node: list_head linking all powerdomains in a voltagedomain
|
||
|
|
* @pwrstctrl_offs: (AM33XX only) XXX_PWRSTCTRL reg offset from prcm_offs
|
||
|
|
* @pwrstst_offs: (AM33XX only) XXX_PWRSTST reg offset from prcm_offs
|
||
|
|
* @logicretstate_mask: (AM33XX only) mask for logic retention bitfield
|
||
|
|
* in @pwrstctrl_offs
|
||
|
|
* @mem_on_mask: (AM33XX only) mask for mem on bitfield in @pwrstctrl_offs
|
||
|
|
* @mem_ret_mask: (AM33XX only) mask for mem ret bitfield in @pwrstctrl_offs
|
||
|
|
* @mem_pwrst_mask: (AM33XX only) mask for mem state bitfield in @pwrstst_offs
|
||
|
|
* @mem_retst_mask: (AM33XX only) mask for mem retention state bitfield
|
||
|
|
* in @pwrstctrl_offs
|
||
|
|
* @state:
|
||
|
|
* @state_counter:
|
||
|
|
* @timer:
|
||
|
|
* @state_timer:
|
||
|
|
* @_lock: spinlock used to serialize powerdomain and some clockdomain ops
|
||
|
|
* @_lock_flags: stored flags when @_lock is taken
|
||
|
|
*
|
||
|
|
* @prcm_partition possible values are defined in mach-omap2/prcm44xx.h.
|
||
|
|
*/
|
||
|
|
struct powerdomain {
|
||
|
|
const char *name;
|
||
|
|
union {
|
||
|
|
const char *name;
|
||
|
|
struct voltagedomain *ptr;
|
||
|
|
} voltdm;
|
||
|
|
const s16 prcm_offs;
|
||
|
|
const u8 pwrsts;
|
||
|
|
const u8 pwrsts_logic_ret;
|
||
|
|
const u8 flags;
|
||
|
|
const u8 banks;
|
||
|
|
const u8 pwrsts_mem_ret[PWRDM_MAX_MEM_BANKS];
|
||
|
|
const u8 pwrsts_mem_on[PWRDM_MAX_MEM_BANKS];
|
||
|
|
const u8 prcm_partition;
|
||
|
|
struct clockdomain *pwrdm_clkdms[PWRDM_MAX_CLKDMS];
|
||
|
|
struct list_head node;
|
||
|
|
struct list_head voltdm_node;
|
||
|
|
int state;
|
||
|
|
unsigned state_counter[PWRDM_MAX_PWRSTS];
|
||
|
|
unsigned ret_logic_off_counter;
|
||
|
|
unsigned ret_mem_off_counter[PWRDM_MAX_MEM_BANKS];
|
||
|
|
spinlock_t _lock;
|
||
|
|
unsigned long _lock_flags;
|
||
|
|
const u8 pwrstctrl_offs;
|
||
|
|
const u8 pwrstst_offs;
|
||
|
|
const u32 logicretstate_mask;
|
||
|
|
const u32 mem_on_mask[PWRDM_MAX_MEM_BANKS];
|
||
|
|
const u32 mem_ret_mask[PWRDM_MAX_MEM_BANKS];
|
||
|
|
const u32 mem_pwrst_mask[PWRDM_MAX_MEM_BANKS];
|
||
|
|
const u32 mem_retst_mask[PWRDM_MAX_MEM_BANKS];
|
||
|
|
|
||
|
|
#ifdef CONFIG_PM_DEBUG
|
||
|
|
s64 timer;
|
||
|
|
s64 state_timer[PWRDM_MAX_PWRSTS];
|
||
|
|
#endif
|
||
|
|
u32 context;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct pwrdm_ops - Arch specific function implementations
|
||
|
|
* @pwrdm_set_next_pwrst: Set the target power state for a pd
|
||
|
|
* @pwrdm_read_next_pwrst: Read the target power state set for a pd
|
||
|
|
* @pwrdm_read_pwrst: Read the current power state of a pd
|
||
|
|
* @pwrdm_read_prev_pwrst: Read the prev power state entered by the pd
|
||
|
|
* @pwrdm_set_logic_retst: Set the logic state in RET for a pd
|
||
|
|
* @pwrdm_set_mem_onst: Set the Memory state in ON for a pd
|
||
|
|
* @pwrdm_set_mem_retst: Set the Memory state in RET for a pd
|
||
|
|
* @pwrdm_read_logic_pwrst: Read the current logic state of a pd
|
||
|
|
* @pwrdm_read_prev_logic_pwrst: Read the previous logic state entered by a pd
|
||
|
|
* @pwrdm_read_logic_retst: Read the logic state in RET for a pd
|
||
|
|
* @pwrdm_read_mem_pwrst: Read the current memory state of a pd
|
||
|
|
* @pwrdm_read_prev_mem_pwrst: Read the previous memory state entered by a pd
|
||
|
|
* @pwrdm_read_mem_retst: Read the memory state in RET for a pd
|
||
|
|
* @pwrdm_clear_all_prev_pwrst: Clear all previous power states logged for a pd
|
||
|
|
* @pwrdm_enable_hdwr_sar: Enable Hardware Save-Restore feature for the pd
|
||
|
|
* @pwrdm_disable_hdwr_sar: Disable Hardware Save-Restore feature for a pd
|
||
|
|
* @pwrdm_set_lowpwrstchange: Enable pd transitions from a shallow to deep sleep
|
||
|
|
* @pwrdm_wait_transition: Wait for a pd state transition to complete
|
||
|
|
* @pwrdm_has_voltdm: Check if a voltdm association is needed
|
||
|
|
*
|
||
|
|
* Regarding @pwrdm_set_lowpwrstchange: On the OMAP2 and 3-family
|
||
|
|
* chips, a powerdomain's power state is not allowed to directly
|
||
|
|
* transition from one low-power state (e.g., CSWR) to another
|
||
|
|
* low-power state (e.g., OFF) without first waking up the
|
||
|
|
* powerdomain. This wastes energy. So OMAP4 chips support the
|
||
|
|
* ability to transition a powerdomain power state directly from one
|
||
|
|
* low-power state to another. The function pointed to by
|
||
|
|
* @pwrdm_set_lowpwrstchange is intended to configure the OMAP4
|
||
|
|
* hardware powerdomain state machine to enable this feature.
|
||
|
|
*/
|
||
|
|
struct pwrdm_ops {
|
||
|
|
int (*pwrdm_set_next_pwrst)(struct powerdomain *pwrdm, u8 pwrst);
|
||
|
|
int (*pwrdm_read_next_pwrst)(struct powerdomain *pwrdm);
|
||
|
|
int (*pwrdm_read_pwrst)(struct powerdomain *pwrdm);
|
||
|
|
int (*pwrdm_read_prev_pwrst)(struct powerdomain *pwrdm);
|
||
|
|
int (*pwrdm_set_logic_retst)(struct powerdomain *pwrdm, u8 pwrst);
|
||
|
|
int (*pwrdm_set_mem_onst)(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
|
||
|
|
int (*pwrdm_set_mem_retst)(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
|
||
|
|
int (*pwrdm_read_logic_pwrst)(struct powerdomain *pwrdm);
|
||
|
|
int (*pwrdm_read_prev_logic_pwrst)(struct powerdomain *pwrdm);
|
||
|
|
int (*pwrdm_read_logic_retst)(struct powerdomain *pwrdm);
|
||
|
|
int (*pwrdm_read_mem_pwrst)(struct powerdomain *pwrdm, u8 bank);
|
||
|
|
int (*pwrdm_read_prev_mem_pwrst)(struct powerdomain *pwrdm, u8 bank);
|
||
|
|
int (*pwrdm_read_mem_retst)(struct powerdomain *pwrdm, u8 bank);
|
||
|
|
int (*pwrdm_clear_all_prev_pwrst)(struct powerdomain *pwrdm);
|
||
|
|
int (*pwrdm_enable_hdwr_sar)(struct powerdomain *pwrdm);
|
||
|
|
int (*pwrdm_disable_hdwr_sar)(struct powerdomain *pwrdm);
|
||
|
|
int (*pwrdm_set_lowpwrstchange)(struct powerdomain *pwrdm);
|
||
|
|
int (*pwrdm_wait_transition)(struct powerdomain *pwrdm);
|
||
|
|
int (*pwrdm_has_voltdm)(void);
|
||
|
|
void (*pwrdm_save_context)(struct powerdomain *pwrdm);
|
||
|
|
void (*pwrdm_restore_context)(struct powerdomain *pwrdm);
|
||
|
|
};
|
||
|
|
|
||
|
|
int pwrdm_register_platform_funcs(struct pwrdm_ops *custom_funcs);
|
||
|
|
int pwrdm_register_pwrdms(struct powerdomain **pwrdm_list);
|
||
|
|
int pwrdm_complete_init(void);
|
||
|
|
|
||
|
|
struct powerdomain *pwrdm_lookup(const char *name);
|
||
|
|
|
||
|
|
int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user),
|
||
|
|
void *user);
|
||
|
|
int pwrdm_for_each_nolock(int (*fn)(struct powerdomain *pwrdm, void *user),
|
||
|
|
void *user);
|
||
|
|
|
||
|
|
int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm);
|
||
|
|
|
||
|
|
int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm);
|
||
|
|
|
||
|
|
u8 pwrdm_get_valid_lp_state(struct powerdomain *pwrdm,
|
||
|
|
bool is_logic_state, u8 req_state);
|
||
|
|
|
||
|
|
int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst);
|
||
|
|
int pwrdm_read_next_pwrst(struct powerdomain *pwrdm);
|
||
|
|
int pwrdm_read_pwrst(struct powerdomain *pwrdm);
|
||
|
|
int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm);
|
||
|
|
int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm);
|
||
|
|
|
||
|
|
int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst);
|
||
|
|
int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
|
||
|
|
int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
|
||
|
|
|
||
|
|
int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm);
|
||
|
|
int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm);
|
||
|
|
int pwrdm_read_logic_retst(struct powerdomain *pwrdm);
|
||
|
|
int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
|
||
|
|
int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
|
||
|
|
int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank);
|
||
|
|
|
||
|
|
int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm);
|
||
|
|
int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm);
|
||
|
|
bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm);
|
||
|
|
|
||
|
|
int pwrdm_state_switch_nolock(struct powerdomain *pwrdm);
|
||
|
|
int pwrdm_state_switch(struct powerdomain *pwrdm);
|
||
|
|
int pwrdm_pre_transition(struct powerdomain *pwrdm);
|
||
|
|
int pwrdm_post_transition(struct powerdomain *pwrdm);
|
||
|
|
int pwrdm_get_context_loss_count(struct powerdomain *pwrdm);
|
||
|
|
bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm);
|
||
|
|
|
||
|
|
extern int omap_set_pwrdm_state(struct powerdomain *pwrdm, u8 state);
|
||
|
|
|
||
|
|
extern void omap242x_powerdomains_init(void);
|
||
|
|
extern void omap243x_powerdomains_init(void);
|
||
|
|
extern void omap3xxx_powerdomains_init(void);
|
||
|
|
extern void am33xx_powerdomains_init(void);
|
||
|
|
extern void omap44xx_powerdomains_init(void);
|
||
|
|
extern void omap54xx_powerdomains_init(void);
|
||
|
|
extern void dra7xx_powerdomains_init(void);
|
||
|
|
void am43xx_powerdomains_init(void);
|
||
|
|
|
||
|
|
extern struct pwrdm_ops omap2_pwrdm_operations;
|
||
|
|
extern struct pwrdm_ops omap3_pwrdm_operations;
|
||
|
|
extern struct pwrdm_ops am33xx_pwrdm_operations;
|
||
|
|
extern struct pwrdm_ops omap4_pwrdm_operations;
|
||
|
|
|
||
|
|
/* Common Internal functions used across OMAP rev's */
|
||
|
|
extern u32 omap2_pwrdm_get_mem_bank_onstate_mask(u8 bank);
|
||
|
|
extern u32 omap2_pwrdm_get_mem_bank_retst_mask(u8 bank);
|
||
|
|
extern u32 omap2_pwrdm_get_mem_bank_stst_mask(u8 bank);
|
||
|
|
|
||
|
|
extern struct powerdomain wkup_omap2_pwrdm;
|
||
|
|
extern struct powerdomain gfx_omap2_pwrdm;
|
||
|
|
|
||
|
|
extern void pwrdm_lock(struct powerdomain *pwrdm);
|
||
|
|
extern void pwrdm_unlock(struct powerdomain *pwrdm);
|
||
|
|
|
||
|
|
extern void pwrdms_save_context(void);
|
||
|
|
extern void pwrdms_restore_context(void);
|
||
|
|
|
||
|
|
extern void pwrdms_lost_power(void);
|
||
|
|
#endif
|