1/* 2 * OMAP2/3/4 powerdomain control 3 * 4 * Copyright (C) 2007-2008, 2010 Texas Instruments, Inc. 5 * Copyright (C) 2007-2011 Nokia Corporation 6 * 7 * Paul Walmsley 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 * 13 * XXX This should be moved to the mach-omap2/ directory at the earliest 14 * opportunity. 15 */ 16 17#ifndef __ARCH_ARM_MACH_OMAP2_POWERDOMAIN_H 18#define __ARCH_ARM_MACH_OMAP2_POWERDOMAIN_H 19 20#include <linux/types.h> 21#include <linux/list.h> 22#include <linux/spinlock.h> 23 24/* Powerdomain basic power states */ 25#define PWRDM_POWER_OFF 0x0 26#define PWRDM_POWER_RET 0x1 27#define PWRDM_POWER_INACTIVE 0x2 28#define PWRDM_POWER_ON 0x3 29 30#define PWRDM_MAX_PWRSTS 4 31 32/* Powerdomain allowable state bitfields */ 33#define PWRSTS_ON (1 << PWRDM_POWER_ON) 34#define PWRSTS_INACTIVE (1 << PWRDM_POWER_INACTIVE) 35#define PWRSTS_RET (1 << PWRDM_POWER_RET) 36#define PWRSTS_OFF (1 << PWRDM_POWER_OFF) 37 38#define PWRSTS_OFF_ON (PWRSTS_OFF | PWRSTS_ON) 39#define PWRSTS_OFF_RET (PWRSTS_OFF | PWRSTS_RET) 40#define PWRSTS_RET_ON (PWRSTS_RET | PWRSTS_ON) 41#define PWRSTS_OFF_RET_ON (PWRSTS_OFF_RET | PWRSTS_ON) 42#define PWRSTS_INA_ON (PWRSTS_INACTIVE | PWRSTS_ON) 43 44 45/* 46 * Powerdomain flags (struct powerdomain.flags) 47 * 48 * PWRDM_HAS_HDWR_SAR - powerdomain has hardware save-and-restore support 49 * 50 * PWRDM_HAS_MPU_QUIRK - MPU pwr domain has MEM bank 0 bits in MEM 51 * bank 1 position. This is true for OMAP3430 52 * 53 * PWRDM_HAS_LOWPOWERSTATECHANGE - can transition from a sleep state 54 * to a lower sleep state without waking up the powerdomain 55 */ 56#define PWRDM_HAS_HDWR_SAR BIT(0) 57#define PWRDM_HAS_MPU_QUIRK BIT(1) 58#define PWRDM_HAS_LOWPOWERSTATECHANGE BIT(2) 59 60/* 61 * Number of memory banks that are power-controllable. On OMAP4430, the 62 * maximum is 5. 63 */ 64#define PWRDM_MAX_MEM_BANKS 5 65 66/* 67 * Maximum number of clockdomains that can be associated with a powerdomain. 68 * PER powerdomain on AM33XX is the worst case 69 */ 70#define PWRDM_MAX_CLKDMS 11 71 72/* XXX A completely arbitrary number. What is reasonable here? */ 73#define PWRDM_TRANSITION_BAILOUT 100000 74 75struct clockdomain; 76struct powerdomain; 77struct voltagedomain; 78 79/** 80 * struct powerdomain - OMAP powerdomain 81 * @name: Powerdomain name 82 * @voltdm: voltagedomain containing this powerdomain 83 * @prcm_offs: the address offset from CM_BASE/PRM_BASE 84 * @prcm_partition: (OMAP4 only) the PRCM partition ID containing @prcm_offs 85 * @pwrsts: Possible powerdomain power states 86 * @pwrsts_logic_ret: Possible logic power states when pwrdm in RETENTION 87 * @flags: Powerdomain flags 88 * @banks: Number of software-controllable memory banks in this powerdomain 89 * @pwrsts_mem_ret: Possible memory bank pwrstates when pwrdm in RETENTION 90 * @pwrsts_mem_on: Possible memory bank pwrstates when pwrdm in ON 91 * @pwrdm_clkdms: Clockdomains in this powerdomain 92 * @node: list_head linking all powerdomains 93 * @voltdm_node: list_head linking all powerdomains in a voltagedomain 94 * @pwrstctrl_offs: (AM33XX only) XXX_PWRSTCTRL reg offset from prcm_offs 95 * @pwrstst_offs: (AM33XX only) XXX_PWRSTST reg offset from prcm_offs 96 * @logicretstate_mask: (AM33XX only) mask for logic retention bitfield 97 * in @pwrstctrl_offs 98 * @mem_on_mask: (AM33XX only) mask for mem on bitfield in @pwrstctrl_offs 99 * @mem_ret_mask: (AM33XX only) mask for mem ret bitfield in @pwrstctrl_offs 100 * @mem_pwrst_mask: (AM33XX only) mask for mem state bitfield in @pwrstst_offs 101 * @mem_retst_mask: (AM33XX only) mask for mem retention state bitfield 102 * in @pwrstctrl_offs 103 * @state: 104 * @state_counter: 105 * @timer: 106 * @state_timer: 107 * @_lock: spinlock used to serialize powerdomain and some clockdomain ops 108 * @_lock_flags: stored flags when @_lock is taken 109 * 110 * @prcm_partition possible values are defined in mach-omap2/prcm44xx.h. 111 */ 112struct powerdomain { 113 const char *name; 114 union { 115 const char *name; 116 struct voltagedomain *ptr; 117 } voltdm; 118 const s16 prcm_offs; 119 const u8 pwrsts; 120 const u8 pwrsts_logic_ret; 121 const u8 flags; 122 const u8 banks; 123 const u8 pwrsts_mem_ret[PWRDM_MAX_MEM_BANKS]; 124 const u8 pwrsts_mem_on[PWRDM_MAX_MEM_BANKS]; 125 const u8 prcm_partition; 126 struct clockdomain *pwrdm_clkdms[PWRDM_MAX_CLKDMS]; 127 struct list_head node; 128 struct list_head voltdm_node; 129 int state; 130 unsigned state_counter[PWRDM_MAX_PWRSTS]; 131 unsigned ret_logic_off_counter; 132 unsigned ret_mem_off_counter[PWRDM_MAX_MEM_BANKS]; 133 spinlock_t _lock; 134 unsigned long _lock_flags; 135 const u8 pwrstctrl_offs; 136 const u8 pwrstst_offs; 137 const u32 logicretstate_mask; 138 const u32 mem_on_mask[PWRDM_MAX_MEM_BANKS]; 139 const u32 mem_ret_mask[PWRDM_MAX_MEM_BANKS]; 140 const u32 mem_pwrst_mask[PWRDM_MAX_MEM_BANKS]; 141 const u32 mem_retst_mask[PWRDM_MAX_MEM_BANKS]; 142 143#ifdef CONFIG_PM_DEBUG 144 s64 timer; 145 s64 state_timer[PWRDM_MAX_PWRSTS]; 146#endif 147}; 148 149/** 150 * struct pwrdm_ops - Arch specific function implementations 151 * @pwrdm_set_next_pwrst: Set the target power state for a pd 152 * @pwrdm_read_next_pwrst: Read the target power state set for a pd 153 * @pwrdm_read_pwrst: Read the current power state of a pd 154 * @pwrdm_read_prev_pwrst: Read the prev power state entered by the pd 155 * @pwrdm_set_logic_retst: Set the logic state in RET for a pd 156 * @pwrdm_set_mem_onst: Set the Memory state in ON for a pd 157 * @pwrdm_set_mem_retst: Set the Memory state in RET for a pd 158 * @pwrdm_read_logic_pwrst: Read the current logic state of a pd 159 * @pwrdm_read_prev_logic_pwrst: Read the previous logic state entered by a pd 160 * @pwrdm_read_logic_retst: Read the logic state in RET for a pd 161 * @pwrdm_read_mem_pwrst: Read the current memory state of a pd 162 * @pwrdm_read_prev_mem_pwrst: Read the previous memory state entered by a pd 163 * @pwrdm_read_mem_retst: Read the memory state in RET for a pd 164 * @pwrdm_clear_all_prev_pwrst: Clear all previous power states logged for a pd 165 * @pwrdm_enable_hdwr_sar: Enable Hardware Save-Restore feature for the pd 166 * @pwrdm_disable_hdwr_sar: Disable Hardware Save-Restore feature for a pd 167 * @pwrdm_set_lowpwrstchange: Enable pd transitions from a shallow to deep sleep 168 * @pwrdm_wait_transition: Wait for a pd state transition to complete 169 * @pwrdm_has_voltdm: Check if a voltdm association is needed 170 * 171 * Regarding @pwrdm_set_lowpwrstchange: On the OMAP2 and 3-family 172 * chips, a powerdomain's power state is not allowed to directly 173 * transition from one low-power state (e.g., CSWR) to another 174 * low-power state (e.g., OFF) without first waking up the 175 * powerdomain. This wastes energy. So OMAP4 chips support the 176 * ability to transition a powerdomain power state directly from one 177 * low-power state to another. The function pointed to by 178 * @pwrdm_set_lowpwrstchange is intended to configure the OMAP4 179 * hardware powerdomain state machine to enable this feature. 180 */ 181struct pwrdm_ops { 182 int (*pwrdm_set_next_pwrst)(struct powerdomain *pwrdm, u8 pwrst); 183 int (*pwrdm_read_next_pwrst)(struct powerdomain *pwrdm); 184 int (*pwrdm_read_pwrst)(struct powerdomain *pwrdm); 185 int (*pwrdm_read_prev_pwrst)(struct powerdomain *pwrdm); 186 int (*pwrdm_set_logic_retst)(struct powerdomain *pwrdm, u8 pwrst); 187 int (*pwrdm_set_mem_onst)(struct powerdomain *pwrdm, u8 bank, u8 pwrst); 188 int (*pwrdm_set_mem_retst)(struct powerdomain *pwrdm, u8 bank, u8 pwrst); 189 int (*pwrdm_read_logic_pwrst)(struct powerdomain *pwrdm); 190 int (*pwrdm_read_prev_logic_pwrst)(struct powerdomain *pwrdm); 191 int (*pwrdm_read_logic_retst)(struct powerdomain *pwrdm); 192 int (*pwrdm_read_mem_pwrst)(struct powerdomain *pwrdm, u8 bank); 193 int (*pwrdm_read_prev_mem_pwrst)(struct powerdomain *pwrdm, u8 bank); 194 int (*pwrdm_read_mem_retst)(struct powerdomain *pwrdm, u8 bank); 195 int (*pwrdm_clear_all_prev_pwrst)(struct powerdomain *pwrdm); 196 int (*pwrdm_enable_hdwr_sar)(struct powerdomain *pwrdm); 197 int (*pwrdm_disable_hdwr_sar)(struct powerdomain *pwrdm); 198 int (*pwrdm_set_lowpwrstchange)(struct powerdomain *pwrdm); 199 int (*pwrdm_wait_transition)(struct powerdomain *pwrdm); 200 int (*pwrdm_has_voltdm)(void); 201}; 202 203int pwrdm_register_platform_funcs(struct pwrdm_ops *custom_funcs); 204int pwrdm_register_pwrdms(struct powerdomain **pwrdm_list); 205int pwrdm_complete_init(void); 206 207struct powerdomain *pwrdm_lookup(const char *name); 208 209int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user), 210 void *user); 211int pwrdm_for_each_nolock(int (*fn)(struct powerdomain *pwrdm, void *user), 212 void *user); 213 214int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm); 215 216int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm); 217 218u8 pwrdm_get_valid_lp_state(struct powerdomain *pwrdm, 219 bool is_logic_state, u8 req_state); 220 221int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst); 222int pwrdm_read_next_pwrst(struct powerdomain *pwrdm); 223int pwrdm_read_pwrst(struct powerdomain *pwrdm); 224int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm); 225int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm); 226 227int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst); 228int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst); 229int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst); 230 231int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm); 232int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm); 233int pwrdm_read_logic_retst(struct powerdomain *pwrdm); 234int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank); 235int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank); 236int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank); 237 238int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm); 239int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm); 240bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm); 241 242int pwrdm_state_switch_nolock(struct powerdomain *pwrdm); 243int pwrdm_state_switch(struct powerdomain *pwrdm); 244int pwrdm_pre_transition(struct powerdomain *pwrdm); 245int pwrdm_post_transition(struct powerdomain *pwrdm); 246int pwrdm_get_context_loss_count(struct powerdomain *pwrdm); 247bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm); 248 249extern int omap_set_pwrdm_state(struct powerdomain *pwrdm, u8 state); 250 251extern void omap242x_powerdomains_init(void); 252extern void omap243x_powerdomains_init(void); 253extern void omap3xxx_powerdomains_init(void); 254extern void am33xx_powerdomains_init(void); 255extern void omap44xx_powerdomains_init(void); 256extern void omap54xx_powerdomains_init(void); 257extern void dra7xx_powerdomains_init(void); 258void am43xx_powerdomains_init(void); 259 260extern struct pwrdm_ops omap2_pwrdm_operations; 261extern struct pwrdm_ops omap3_pwrdm_operations; 262extern struct pwrdm_ops am33xx_pwrdm_operations; 263extern struct pwrdm_ops omap4_pwrdm_operations; 264 265/* Common Internal functions used across OMAP rev's */ 266extern u32 omap2_pwrdm_get_mem_bank_onstate_mask(u8 bank); 267extern u32 omap2_pwrdm_get_mem_bank_retst_mask(u8 bank); 268extern u32 omap2_pwrdm_get_mem_bank_stst_mask(u8 bank); 269 270extern struct powerdomain wkup_omap2_pwrdm; 271extern struct powerdomain gfx_omap2_pwrdm; 272 273extern void pwrdm_lock(struct powerdomain *pwrdm); 274extern void pwrdm_unlock(struct powerdomain *pwrdm); 275 276#endif 277