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Diffstat (limited to 'arch/arm/mach-omap2/powerdomain.h')
| -rw-r--r-- | arch/arm/mach-omap2/powerdomain.h | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/powerdomain.h b/arch/arm/mach-omap2/powerdomain.h new file mode 100644 index 00000000000..c66431edfeb --- /dev/null +++ b/arch/arm/mach-omap2/powerdomain.h @@ -0,0 +1,233 @@ +/* + * OMAP2/3/4 powerdomain control + * + * Copyright (C) 2007-2008, 2010 Texas Instruments, Inc. + * Copyright (C) 2007-2010 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> + +/* 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_OFF (1 << PWRDM_POWER_OFF) +#define PWRSTS_OFF_ON ((1 << PWRDM_POWER_OFF) | \ + (1 << PWRDM_POWER_ON)) + +#define PWRSTS_OFF_RET ((1 << PWRDM_POWER_OFF) | \ + (1 << PWRDM_POWER_RET)) + +#define PWRSTS_RET_ON ((1 << PWRDM_POWER_RET) | \ + (1 << PWRDM_POWER_ON)) + +#define PWRSTS_OFF_RET_ON (PWRSTS_OFF_RET | (1 << PWRDM_POWER_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 + * @omap_chip: represents the OMAP chip types containing this pwrdm + * @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 + * @state: + * @state_counter: + * @timer: + * @state_timer: + * + * @prcm_partition possible values are defined in mach-omap2/prcm44xx.h. + */ +struct powerdomain { + const char *name; + const struct omap_chip_id omap_chip; + 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; + 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 specfic 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); +}; + +void pwrdm_fw_init(void); +void pwrdm_init(struct powerdomain **pwrdm_list, struct pwrdm_ops *custom_funcs); + +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)); + +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); +u32 pwrdm_get_context_loss_count(struct powerdomain *pwrdm); + +extern void omap2xxx_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 |