| /* |
| * 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 |