2 * OMAP2/3 powerdomain control
4 * Copyright (C) 2007-2008 Texas Instruments, Inc.
5 * Copyright (C) 2007-2009 Nokia Corporation
7 * Written by Paul Walmsley
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.
14 #ifndef ASM_ARM_ARCH_OMAP_POWERDOMAIN
15 #define ASM_ARM_ARCH_OMAP_POWERDOMAIN
17 #include <linux/types.h>
18 #include <linux/list.h>
20 #include <asm/atomic.h>
25 /* Powerdomain basic power states */
26 #define PWRDM_POWER_OFF 0x0
27 #define PWRDM_POWER_RET 0x1
28 #define PWRDM_POWER_INACTIVE 0x2
29 #define PWRDM_POWER_ON 0x3
31 #define PWRDM_MAX_PWRSTS 4
33 /* Powerdomain allowable state bitfields */
34 #define PWRSTS_OFF_ON ((1 << PWRDM_POWER_OFF) | \
35 (1 << PWRDM_POWER_ON))
37 #define PWRSTS_OFF_RET ((1 << PWRDM_POWER_OFF) | \
38 (1 << PWRDM_POWER_RET))
40 #define PWRSTS_RET_ON ((1 << PWRDM_POWER_RET) | \
41 (1 << PWRDM_POWER_ON))
43 #define PWRSTS_OFF_RET_ON (PWRSTS_OFF_RET | (1 << PWRDM_POWER_ON))
46 /* Powerdomain flags */
47 #define PWRDM_HAS_HDWR_SAR (1 << 0) /* hardware save-and-restore support */
48 #define PWRDM_HAS_MPU_QUIRK (1 << 1) /* MPU pwr domain has MEM bank 0 bits
49 * in MEM bank 1 position. This is
54 * Number of memory banks that are power-controllable. On OMAP4430, the
57 #define PWRDM_MAX_MEM_BANKS 5
60 * Maximum number of clockdomains that can be associated with a powerdomain.
61 * CORE powerdomain on OMAP4 is the worst case
63 #define PWRDM_MAX_CLKDMS 9
65 /* XXX A completely arbitrary number. What is reasonable here? */
66 #define PWRDM_TRANSITION_BAILOUT 100000
73 /* Powerdomain name */
76 /* Used to represent the OMAP chip types containing this pwrdm */
77 const struct omap_chip_id omap_chip;
79 /* the address offset from CM_BASE/PRM_BASE */
82 /* Possible powerdomain power states */
85 /* Possible logic power states when pwrdm in RETENTION */
86 const u8 pwrsts_logic_ret;
88 /* Powerdomain flags */
91 /* Number of software-controllable memory banks in this powerdomain */
94 /* Possible memory bank pwrstates when pwrdm in RETENTION */
95 const u8 pwrsts_mem_ret[PWRDM_MAX_MEM_BANKS];
97 /* Possible memory bank pwrstates when pwrdm is ON */
98 const u8 pwrsts_mem_on[PWRDM_MAX_MEM_BANKS];
100 /* Clockdomains in this powerdomain */
101 struct clockdomain *pwrdm_clkdms[PWRDM_MAX_CLKDMS];
103 struct list_head node;
106 unsigned state_counter[PWRDM_MAX_PWRSTS];
108 #ifdef CONFIG_PM_DEBUG
110 s64 state_timer[PWRDM_MAX_PWRSTS];
115 void pwrdm_init(struct powerdomain **pwrdm_list);
117 struct powerdomain *pwrdm_lookup(const char *name);
119 int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user),
121 int pwrdm_for_each_nolock(int (*fn)(struct powerdomain *pwrdm, void *user),
124 int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm);
125 int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm);
126 int pwrdm_for_each_clkdm(struct powerdomain *pwrdm,
127 int (*fn)(struct powerdomain *pwrdm,
128 struct clockdomain *clkdm));
130 int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm);
132 int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst);
133 int pwrdm_read_next_pwrst(struct powerdomain *pwrdm);
134 int pwrdm_read_pwrst(struct powerdomain *pwrdm);
135 int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm);
136 int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm);
138 int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst);
139 int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
140 int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
142 int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm);
143 int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm);
144 int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
145 int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
147 int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm);
148 int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm);
149 bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm);
151 int pwrdm_wait_transition(struct powerdomain *pwrdm);
153 int pwrdm_state_switch(struct powerdomain *pwrdm);
154 int pwrdm_clkdm_state_switch(struct clockdomain *clkdm);
155 int pwrdm_pre_transition(void);
156 int pwrdm_post_transition(void);