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90dbc7b0b8
Some powerdomains in OMAP4 support a direct transition from one sleep state to another deeper sleep state without having to wakeup the powerdomain. This patch adds an api in the powerdomain framework to set the LOWPOWERSTATECHANGE bit in PWRSTCTRL register. Signed-off-by: Rajendra Nayak <rnayak@ti.com> Signed-off-by: Paul Walmsley <paul@pwsan.com>
166 lines
5.0 KiB
C
166 lines
5.0 KiB
C
/*
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* OMAP2/3 powerdomain control
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*
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* Copyright (C) 2007-2008 Texas Instruments, Inc.
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* Copyright (C) 2007-2009 Nokia Corporation
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*
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* Written by 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 ASM_ARM_ARCH_OMAP_POWERDOMAIN
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#define ASM_ARM_ARCH_OMAP_POWERDOMAIN
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#include <linux/types.h>
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#include <linux/list.h>
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#include <asm/atomic.h>
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#include <plat/cpu.h>
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/* Powerdomain basic power states */
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#define PWRDM_POWER_OFF 0x0
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#define PWRDM_POWER_RET 0x1
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#define PWRDM_POWER_INACTIVE 0x2
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#define PWRDM_POWER_ON 0x3
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#define PWRDM_MAX_PWRSTS 4
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/* Powerdomain allowable state bitfields */
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#define PWRSTS_ON (1 << PWRDM_POWER_ON)
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#define PWRSTS_OFF_ON ((1 << PWRDM_POWER_OFF) | \
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(1 << PWRDM_POWER_ON))
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#define PWRSTS_OFF_RET ((1 << PWRDM_POWER_OFF) | \
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(1 << PWRDM_POWER_RET))
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#define PWRSTS_RET_ON ((1 << PWRDM_POWER_RET) | \
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(1 << PWRDM_POWER_ON))
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#define PWRSTS_OFF_RET_ON (PWRSTS_OFF_RET | (1 << PWRDM_POWER_ON))
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/* Powerdomain flags */
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#define PWRDM_HAS_HDWR_SAR (1 << 0) /* hardware save-and-restore support */
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#define PWRDM_HAS_MPU_QUIRK (1 << 1) /* MPU pwr domain has MEM bank 0 bits
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* in MEM bank 1 position. This is
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* true for OMAP3430
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*/
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#define PWRDM_HAS_LOWPOWERSTATECHANGE (1 << 2) /*
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* support to transition from a
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* sleep state to a lower sleep
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* state without waking up the
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* powerdomain
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*/
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/*
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* Number of memory banks that are power-controllable. On OMAP4430, the
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* maximum is 5.
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*/
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#define PWRDM_MAX_MEM_BANKS 5
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/*
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* Maximum number of clockdomains that can be associated with a powerdomain.
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* CORE powerdomain on OMAP4 is the worst case
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*/
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#define PWRDM_MAX_CLKDMS 9
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/* XXX A completely arbitrary number. What is reasonable here? */
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#define PWRDM_TRANSITION_BAILOUT 100000
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struct clockdomain;
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struct powerdomain;
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/**
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* struct powerdomain - OMAP powerdomain
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* @name: Powerdomain name
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* @omap_chip: represents the OMAP chip types containing this pwrdm
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* @prcm_offs: the address offset from CM_BASE/PRM_BASE
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* @pwrsts: Possible powerdomain power states
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* @pwrsts_logic_ret: Possible logic power states when pwrdm in RETENTION
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* @flags: Powerdomain flags
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* @banks: Number of software-controllable memory banks in this powerdomain
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* @pwrsts_mem_ret: Possible memory bank pwrstates when pwrdm in RETENTION
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* @pwrsts_mem_on: Possible memory bank pwrstates when pwrdm in ON
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* @pwrdm_clkdms: Clockdomains in this powerdomain
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* @node: list_head linking all powerdomains
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* @state:
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* @state_counter:
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* @timer:
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* @state_timer:
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*/
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struct powerdomain {
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const char *name;
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const struct omap_chip_id omap_chip;
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const s16 prcm_offs;
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const u8 pwrsts;
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const u8 pwrsts_logic_ret;
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const u8 flags;
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const u8 banks;
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const u8 pwrsts_mem_ret[PWRDM_MAX_MEM_BANKS];
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const u8 pwrsts_mem_on[PWRDM_MAX_MEM_BANKS];
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struct clockdomain *pwrdm_clkdms[PWRDM_MAX_CLKDMS];
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struct list_head node;
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int state;
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unsigned state_counter[PWRDM_MAX_PWRSTS];
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unsigned ret_logic_off_counter;
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unsigned ret_mem_off_counter[PWRDM_MAX_MEM_BANKS];
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#ifdef CONFIG_PM_DEBUG
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s64 timer;
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s64 state_timer[PWRDM_MAX_PWRSTS];
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#endif
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};
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void pwrdm_init(struct powerdomain **pwrdm_list);
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struct powerdomain *pwrdm_lookup(const char *name);
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int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user),
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void *user);
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int pwrdm_for_each_nolock(int (*fn)(struct powerdomain *pwrdm, void *user),
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void *user);
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int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm);
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int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm);
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int pwrdm_for_each_clkdm(struct powerdomain *pwrdm,
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int (*fn)(struct powerdomain *pwrdm,
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struct clockdomain *clkdm));
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int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm);
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int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst);
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int pwrdm_read_next_pwrst(struct powerdomain *pwrdm);
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int pwrdm_read_pwrst(struct powerdomain *pwrdm);
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int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm);
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int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm);
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int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst);
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int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
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int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
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int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm);
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int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm);
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int pwrdm_read_logic_retst(struct powerdomain *pwrdm);
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int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
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int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
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int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank);
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int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm);
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int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm);
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bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm);
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int pwrdm_wait_transition(struct powerdomain *pwrdm);
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int pwrdm_state_switch(struct powerdomain *pwrdm);
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int pwrdm_clkdm_state_switch(struct clockdomain *clkdm);
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int pwrdm_pre_transition(void);
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int pwrdm_post_transition(void);
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#endif
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