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linux/arch/arm/mach-omap2/powerdomain.h
Tomi Valkeinen fc01387302 ARM: OMAP: change get_context_loss_count ret value to int 
get_context_loss_count functions return context loss count as u32, and
zero means an error. However, zero is also returned when context has
never been lost and could also be returned when the context loss count
has wrapped and goes to zero.

Change the functions to return an int, with negative value meaning an
error.

OMAP HSMMC code uses omap_pm_get_dev_context_loss_count(), but as the
hsmmc code handles the returned value as an int, with negative value
meaning an error, this patch actually fixes hsmmc code also.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Kevin Hilman <khilman@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
[tony@atomide.com: updated to fix a warning with recent dmtimer changes]
Signed-off-by: Tony Lindgren <tony@atomide.com>
2011-11-04 17:41:07 -07:00

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/*
* 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/atomic.h>
#include <plat/cpu.h>
#include "voltage.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)
/* Powerdomain flags */
#define PWRDM_HAS_HDWR_SAR (1 << 0) /* hardware save-and-restore support */
#define PWRDM_HAS_MPU_QUIRK (1 << 1) /* MPU pwr domain has MEM bank 0 bits
* in MEM bank 1 position. This is
* true for OMAP3430
*/
#define PWRDM_HAS_LOWPOWERSTATECHANGE (1 << 2) /*
* support to transition from a
* sleep state to a lower sleep
* state without waking up the
* powerdomain
*/
/*
* 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.
* CORE powerdomain on OMAP4 is the worst case
*/
#define PWRDM_MAX_CLKDMS 9
/* XXX A completely arbitrary number. What is reasonable here? */
#define PWRDM_TRANSITION_BAILOUT 100000
struct clockdomain;
struct powerdomain;
/**
* 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
* @state:
* @state_counter:
* @timer:
* @state_timer:
*
* @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];
#ifdef CONFIG_PM_DEBUG
s64 timer;
s64 state_timer[PWRDM_MAX_PWRSTS];
#endif
};
/**
* 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
*/
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_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_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm);
int pwrdm_for_each_clkdm(struct powerdomain *pwrdm,
int (*fn)(struct powerdomain *pwrdm,
struct clockdomain *clkdm));
struct voltagedomain *pwrdm_get_voltdm(struct powerdomain *pwrdm);
int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm);
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_wait_transition(struct powerdomain *pwrdm);
int pwrdm_state_switch(struct powerdomain *pwrdm);
int pwrdm_clkdm_state_switch(struct clockdomain *clkdm);
int pwrdm_pre_transition(void);
int pwrdm_post_transition(void);
int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm);
int pwrdm_get_context_loss_count(struct powerdomain *pwrdm);
bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm);
extern void omap242x_powerdomains_init(void);
extern void omap243x_powerdomains_init(void);
extern void omap3xxx_powerdomains_init(void);
extern void omap44xx_powerdomains_init(void);
extern struct pwrdm_ops omap2_pwrdm_operations;
extern struct pwrdm_ops omap3_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;
#endif
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