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gerrit-public.fairphone.software / kernel / msm-4.9 / ad67ef6848a1608b0430003e11e7af1ce706e341 / . / arch / arm / plat-omap / include / mach / powerdomain.h
blob: c8f52c6f8b7ed0c96dc22b009d18802db65a4f39 [file] [log] [blame]
Paul Walmsleyad67ef62008-08-19 11:08:40 +0300[diff] [blame^]1/*
2 * OMAP2/3 powerdomain control
3 *
4 * Copyright (C) 2007-8 Texas Instruments, Inc.
5 * Copyright (C) 2007-8 Nokia Corporation
6 *
7 * Written by 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
14#ifndef ASM_ARM_ARCH_OMAP_POWERDOMAIN
15#define ASM_ARM_ARCH_OMAP_POWERDOMAIN
16
17#include <linux/types.h>
18#include <linux/list.h>
19
20#include <asm/atomic.h>
21
22#include <mach/cpu.h>
23
24
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
30
31/* Powerdomain allowable state bitfields */
32#define PWRSTS_OFF_ON ((1 << PWRDM_POWER_OFF) | \
33 (1 << PWRDM_POWER_ON))
34
35#define PWRSTS_OFF_RET ((1 << PWRDM_POWER_OFF) | \
36 (1 << PWRDM_POWER_RET))
37
38#define PWRSTS_OFF_RET_ON (PWRSTS_OFF_RET | (1 << PWRDM_POWER_ON))
39
40
41/*
42 * Number of memory banks that are power-controllable. On OMAP3430, the
43 * maximum is 4.
44 */
45#define PWRDM_MAX_MEM_BANKS 4
46
47/* XXX A completely arbitrary number. What is reasonable here? */
48#define PWRDM_TRANSITION_BAILOUT 100000
49
50struct powerdomain;
51
52/* Encodes dependencies between powerdomains - statically defined */
53struct pwrdm_dep {
54
55 /* Powerdomain name */
56 const char *pwrdm_name;
57
58 /* Powerdomain pointer - resolved by the powerdomain code */
59 struct powerdomain *pwrdm;
60
61 /* Flags to mark OMAP chip restrictions, etc. */
62 const struct omap_chip_id omap_chip;
63
64};
65
66struct powerdomain {
67
68 /* Powerdomain name */
69 const char *name;
70
71 /* the address offset from CM_BASE/PRM_BASE */
72 const s16 prcm_offs;
73
74 /* Used to represent the OMAP chip types containing this pwrdm */
75 const struct omap_chip_id omap_chip;
76
77 /* Bit shift of this powerdomain's PM_WKDEP/CM_SLEEPDEP bit */
78 const u8 dep_bit;
79
80 /* Powerdomains that can be told to wake this powerdomain up */
81 struct pwrdm_dep *wkdep_srcs;
82
83 /* Powerdomains that can be told to keep this pwrdm from inactivity */
84 struct pwrdm_dep *sleepdep_srcs;
85
86 /* Possible powerdomain power states */
87 const u8 pwrsts;
88
89 /* Possible logic power states when pwrdm in RETENTION */
90 const u8 pwrsts_logic_ret;
91
92 /* Number of software-controllable memory banks in this powerdomain */
93 const u8 banks;
94
95 /* Possible memory bank pwrstates when pwrdm in RETENTION */
96 const u8 pwrsts_mem_ret[PWRDM_MAX_MEM_BANKS];
97
98 /* Possible memory bank pwrstates when pwrdm is ON */
99 const u8 pwrsts_mem_on[PWRDM_MAX_MEM_BANKS];
100
101 struct list_head node;
102
103};
104
105
106void pwrdm_init(struct powerdomain **pwrdm_list);
107
108int pwrdm_register(struct powerdomain *pwrdm);
109int pwrdm_unregister(struct powerdomain *pwrdm);
110struct powerdomain *pwrdm_lookup(const char *name);
111
112int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm));
113
114int pwrdm_add_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
115int pwrdm_del_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
116int pwrdm_read_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
117int pwrdm_add_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
118int pwrdm_del_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
119int pwrdm_read_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
120
121int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm);
122
123int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst);
124int pwrdm_read_next_pwrst(struct powerdomain *pwrdm);
125int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm);
126int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm);
127
128int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst);
129int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
130int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
131
132int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm);
133int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm);
134int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
135int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
136
137int pwrdm_wait_transition(struct powerdomain *pwrdm);
138
139#endif