2 * OMAP2/3 powerdomain control
4 * Copyright (C) 2007-8 Texas Instruments, Inc.
5 * Copyright (C) 2007-8 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>
22 #include <asm/arch/cpu.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 /* Powerdomain allowable state bitfields */
32 #define PWRSTS_OFF_ON ((1 << PWRDM_POWER_OFF) | \
33 (1 << PWRDM_POWER_ON))
35 #define PWRSTS_OFF_RET ((1 << PWRDM_POWER_OFF) | \
36 (1 << PWRDM_POWER_RET))
38 #define PWRSTS_OFF_RET_ON (PWRSTS_OFF_RET | (1 << PWRDM_POWER_ON))
42 * Number of memory banks that are power-controllable. On OMAP3430, the
45 #define PWRDM_MAX_MEM_BANKS 4
48 * Maximum number of clockdomains that can be associated with a powerdomain.
49 * CORE powerdomain is probably the worst case.
51 #define PWRDM_MAX_CLKDMS 3
53 /* XXX A completely arbitrary number. What is reasonable here? */
54 #define PWRDM_TRANSITION_BAILOUT 100000
59 /* Encodes dependencies between powerdomains - statically defined */
62 /* Powerdomain name */
63 const char *pwrdm_name;
65 /* Powerdomain pointer - resolved by the powerdomain code */
66 struct powerdomain *pwrdm;
68 /* Flags to mark OMAP chip restrictions, etc. */
69 const struct omap_chip_id omap_chip;
75 /* Powerdomain name */
78 /* the address offset from CM_BASE/PRM_BASE */
81 /* Used to represent the OMAP chip types containing this pwrdm */
82 const struct omap_chip_id omap_chip;
84 /* Bit shift of this powerdomain's PM_WKDEP/CM_SLEEPDEP bit */
87 /* Powerdomains that can be told to wake this powerdomain up */
88 struct pwrdm_dep *wkdep_srcs;
90 /* Powerdomains that can be told to keep this pwrdm from inactivity */
91 struct pwrdm_dep *sleepdep_srcs;
93 /* Possible powerdomain power states */
96 /* Possible logic power states when pwrdm in RETENTION */
97 const u8 pwrsts_logic_ret;
99 /* Number of software-controllable memory banks in this powerdomain */
102 /* Possible memory bank pwrstates when pwrdm in RETENTION */
103 const u8 pwrsts_mem_ret[PWRDM_MAX_MEM_BANKS];
105 /* Possible memory bank pwrstates when pwrdm is ON */
106 const u8 pwrsts_mem_on[PWRDM_MAX_MEM_BANKS];
108 /* Clockdomains in this powerdomain */
109 struct clockdomain *pwrdm_clkdms[PWRDM_MAX_CLKDMS];
111 struct list_head node;
116 void pwrdm_init(struct powerdomain **pwrdm_list);
118 int pwrdm_register(struct powerdomain *pwrdm);
119 int pwrdm_unregister(struct powerdomain *pwrdm);
120 struct powerdomain *pwrdm_lookup(const char *name);
122 int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm));
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_add_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
131 int pwrdm_del_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
132 int pwrdm_read_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
133 int pwrdm_add_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
134 int pwrdm_del_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
135 int pwrdm_read_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
137 int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst);
138 int pwrdm_read_next_pwrst(struct powerdomain *pwrdm);
139 int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm);
140 int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm);
142 int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst);
143 int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
144 int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
146 int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm);
147 int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm);
148 int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
149 int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
151 int pwrdm_wait_transition(struct powerdomain *pwrdm);