Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 2 | /* |
| 3 | * OMAP powerdomain control |
| 4 | * |
Paul Walmsley | 129c65e | 2011-09-14 16:01:21 -0600 | [diff] [blame] | 5 | * Copyright (C) 2007-2008, 2011 Texas Instruments, Inc. |
Paul Walmsley | 694606c | 2011-03-07 19:28:15 -0700 | [diff] [blame] | 6 | * Copyright (C) 2007-2011 Nokia Corporation |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 7 | * |
| 8 | * Written by Paul Walmsley |
Abhijit Pagare | 3a759f0 | 2010-01-26 20:12:53 -0700 | [diff] [blame] | 9 | * Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@ti.com> |
Paul Walmsley | 4788da2 | 2010-05-18 20:24:05 -0600 | [diff] [blame] | 10 | * State counting code by Tero Kristo <tero.kristo@nokia.com> |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 11 | */ |
Paul Walmsley | 33903eb | 2009-12-08 16:33:10 -0700 | [diff] [blame] | 12 | #undef DEBUG |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 13 | |
Keerthy | 4a6dfa4 | 2018-05-16 20:47:01 +0530 | [diff] [blame] | 14 | #include <linux/cpu_pm.h> |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 15 | #include <linux/kernel.h> |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 16 | #include <linux/types.h> |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 17 | #include <linux/list.h> |
| 18 | #include <linux/errno.h> |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 19 | #include <linux/string.h> |
Paul Walmsley | 3a09028 | 2013-01-26 00:58:16 -0700 | [diff] [blame] | 20 | #include <linux/spinlock.h> |
Jean Pihet | 5e7c58d | 2011-03-03 11:25:43 +0100 | [diff] [blame] | 21 | #include <trace/events/power.h> |
| 22 | |
Paul Walmsley | 59fb659 | 2010-12-21 15:30:55 -0700 | [diff] [blame] | 23 | #include "cm2xxx_3xxx.h" |
Paul Walmsley | a64bb9c | 2010-12-21 21:05:14 -0700 | [diff] [blame] | 24 | #include "prcm44xx.h" |
Paul Walmsley | 59fb659 | 2010-12-21 15:30:55 -0700 | [diff] [blame] | 25 | #include "cm44xx.h" |
| 26 | #include "prm2xxx_3xxx.h" |
Paul Walmsley | d198b51 | 2010-12-21 15:30:54 -0700 | [diff] [blame] | 27 | #include "prm44xx.h" |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 28 | |
Jean Pihet | 5e7c58d | 2011-03-03 11:25:43 +0100 | [diff] [blame] | 29 | #include <asm/cpu.h> |
Tony Lindgren | dbc0416 | 2012-08-31 10:59:07 -0700 | [diff] [blame] | 30 | |
Tony Lindgren | dbc0416 | 2012-08-31 10:59:07 -0700 | [diff] [blame] | 31 | #include "powerdomain.h" |
| 32 | #include "clockdomain.h" |
Tero Kristo | 4794208 | 2014-05-11 19:41:50 -0600 | [diff] [blame] | 33 | #include "voltage.h" |
Tony Lindgren | dbc0416 | 2012-08-31 10:59:07 -0700 | [diff] [blame] | 34 | |
| 35 | #include "soc.h" |
Peter 'p2' De Schrijver | 6199ab2 | 2008-10-15 18:13:49 +0300 | [diff] [blame] | 36 | #include "pm.h" |
| 37 | |
Jean Pihet | 5e7c58d | 2011-03-03 11:25:43 +0100 | [diff] [blame] | 38 | #define PWRDM_TRACE_STATES_FLAG (1<<31) |
| 39 | |
Keerthy | 4a6dfa4 | 2018-05-16 20:47:01 +0530 | [diff] [blame] | 40 | void pwrdms_save_context(void); |
| 41 | void pwrdms_restore_context(void); |
| 42 | |
Peter 'p2' De Schrijver | ba20bb1 | 2008-10-15 17:48:43 +0300 | [diff] [blame] | 43 | enum { |
| 44 | PWRDM_STATE_NOW = 0, |
| 45 | PWRDM_STATE_PREV, |
| 46 | }; |
| 47 | |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 48 | /* |
| 49 | * Types of sleep_switch used internally in omap_set_pwrdm_state() |
| 50 | * and its associated static functions |
| 51 | * |
| 52 | * XXX Better documentation is needed here |
| 53 | */ |
| 54 | #define ALREADYACTIVE_SWITCH 0 |
| 55 | #define FORCEWAKEUP_SWITCH 1 |
| 56 | #define LOWPOWERSTATE_SWITCH 2 |
Abhijit Pagare | 3a759f0 | 2010-01-26 20:12:53 -0700 | [diff] [blame] | 57 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 58 | /* pwrdm_list contains all registered struct powerdomains */ |
| 59 | static LIST_HEAD(pwrdm_list); |
| 60 | |
Rajendra Nayak | 3b1e8b2 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 61 | static struct pwrdm_ops *arch_pwrdm; |
| 62 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 63 | /* Private functions */ |
| 64 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 65 | static struct powerdomain *_pwrdm_lookup(const char *name) |
| 66 | { |
| 67 | struct powerdomain *pwrdm, *temp_pwrdm; |
| 68 | |
| 69 | pwrdm = NULL; |
| 70 | |
| 71 | list_for_each_entry(temp_pwrdm, &pwrdm_list, node) { |
| 72 | if (!strcmp(name, temp_pwrdm->name)) { |
| 73 | pwrdm = temp_pwrdm; |
| 74 | break; |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | return pwrdm; |
| 79 | } |
| 80 | |
Paul Walmsley | e909d62a8 | 2010-01-26 20:13:00 -0700 | [diff] [blame] | 81 | /** |
| 82 | * _pwrdm_register - register a powerdomain |
| 83 | * @pwrdm: struct powerdomain * to register |
| 84 | * |
| 85 | * Adds a powerdomain to the internal powerdomain list. Returns |
| 86 | * -EINVAL if given a null pointer, -EEXIST if a powerdomain is |
| 87 | * already registered by the provided name, or 0 upon success. |
| 88 | */ |
| 89 | static int _pwrdm_register(struct powerdomain *pwrdm) |
| 90 | { |
| 91 | int i; |
Kevin Hilman | 048a703 | 2011-03-16 15:52:47 -0700 | [diff] [blame] | 92 | struct voltagedomain *voltdm; |
Paul Walmsley | e909d62a8 | 2010-01-26 20:13:00 -0700 | [diff] [blame] | 93 | |
Paul Walmsley | a64bb9c | 2010-12-21 21:05:14 -0700 | [diff] [blame] | 94 | if (!pwrdm || !pwrdm->name) |
Paul Walmsley | e909d62a8 | 2010-01-26 20:13:00 -0700 | [diff] [blame] | 95 | return -EINVAL; |
| 96 | |
Paul Walmsley | a64bb9c | 2010-12-21 21:05:14 -0700 | [diff] [blame] | 97 | if (cpu_is_omap44xx() && |
| 98 | pwrdm->prcm_partition == OMAP4430_INVALID_PRCM_PARTITION) { |
| 99 | pr_err("powerdomain: %s: missing OMAP4 PRCM partition ID\n", |
| 100 | pwrdm->name); |
| 101 | return -EINVAL; |
| 102 | } |
| 103 | |
Paul Walmsley | e909d62a8 | 2010-01-26 20:13:00 -0700 | [diff] [blame] | 104 | if (_pwrdm_lookup(pwrdm->name)) |
| 105 | return -EEXIST; |
| 106 | |
Rajendra Nayak | cd8abed | 2013-06-17 18:46:22 +0530 | [diff] [blame] | 107 | if (arch_pwrdm && arch_pwrdm->pwrdm_has_voltdm) |
| 108 | if (!arch_pwrdm->pwrdm_has_voltdm()) |
| 109 | goto skip_voltdm; |
| 110 | |
Kevin Hilman | 048a703 | 2011-03-16 15:52:47 -0700 | [diff] [blame] | 111 | voltdm = voltdm_lookup(pwrdm->voltdm.name); |
| 112 | if (!voltdm) { |
| 113 | pr_err("powerdomain: %s: voltagedomain %s does not exist\n", |
| 114 | pwrdm->name, pwrdm->voltdm.name); |
| 115 | return -EINVAL; |
| 116 | } |
| 117 | pwrdm->voltdm.ptr = voltdm; |
Kevin Hilman | e69c22b | 2011-03-16 16:13:15 -0700 | [diff] [blame] | 118 | INIT_LIST_HEAD(&pwrdm->voltdm_node); |
Rajendra Nayak | cd8abed | 2013-06-17 18:46:22 +0530 | [diff] [blame] | 119 | skip_voltdm: |
Paul Walmsley | 3a09028 | 2013-01-26 00:58:16 -0700 | [diff] [blame] | 120 | spin_lock_init(&pwrdm->_lock); |
Kevin Hilman | 048a703 | 2011-03-16 15:52:47 -0700 | [diff] [blame] | 121 | |
Paul Walmsley | e909d62a8 | 2010-01-26 20:13:00 -0700 | [diff] [blame] | 122 | list_add(&pwrdm->node, &pwrdm_list); |
| 123 | |
| 124 | /* Initialize the powerdomain's state counter */ |
Paul Walmsley | cf57aa7 | 2010-01-26 20:13:01 -0700 | [diff] [blame] | 125 | for (i = 0; i < PWRDM_MAX_PWRSTS; i++) |
Paul Walmsley | e909d62a8 | 2010-01-26 20:13:00 -0700 | [diff] [blame] | 126 | pwrdm->state_counter[i] = 0; |
| 127 | |
Thara Gopinath | cde08f8 | 2010-02-24 12:05:50 -0700 | [diff] [blame] | 128 | pwrdm->ret_logic_off_counter = 0; |
| 129 | for (i = 0; i < pwrdm->banks; i++) |
| 130 | pwrdm->ret_mem_off_counter[i] = 0; |
| 131 | |
Rajendra Nayak | 1cfc4bd | 2013-12-02 11:38:14 -0800 | [diff] [blame] | 132 | if (arch_pwrdm && arch_pwrdm->pwrdm_wait_transition) |
| 133 | arch_pwrdm->pwrdm_wait_transition(pwrdm); |
Paul Walmsley | e909d62a8 | 2010-01-26 20:13:00 -0700 | [diff] [blame] | 134 | pwrdm->state = pwrdm_read_pwrst(pwrdm); |
| 135 | pwrdm->state_counter[pwrdm->state] = 1; |
| 136 | |
| 137 | pr_debug("powerdomain: registered %s\n", pwrdm->name); |
| 138 | |
| 139 | return 0; |
| 140 | } |
| 141 | |
Thara Gopinath | cde08f8 | 2010-02-24 12:05:50 -0700 | [diff] [blame] | 142 | static void _update_logic_membank_counters(struct powerdomain *pwrdm) |
| 143 | { |
| 144 | int i; |
| 145 | u8 prev_logic_pwrst, prev_mem_pwrst; |
| 146 | |
| 147 | prev_logic_pwrst = pwrdm_read_prev_logic_pwrst(pwrdm); |
| 148 | if ((pwrdm->pwrsts_logic_ret == PWRSTS_OFF_RET) && |
| 149 | (prev_logic_pwrst == PWRDM_POWER_OFF)) |
| 150 | pwrdm->ret_logic_off_counter++; |
| 151 | |
| 152 | for (i = 0; i < pwrdm->banks; i++) { |
| 153 | prev_mem_pwrst = pwrdm_read_prev_mem_pwrst(pwrdm, i); |
| 154 | |
| 155 | if ((pwrdm->pwrsts_mem_ret[i] == PWRSTS_OFF_RET) && |
| 156 | (prev_mem_pwrst == PWRDM_POWER_OFF)) |
| 157 | pwrdm->ret_mem_off_counter[i]++; |
| 158 | } |
| 159 | } |
| 160 | |
Peter 'p2' De Schrijver | ba20bb1 | 2008-10-15 17:48:43 +0300 | [diff] [blame] | 161 | static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag) |
| 162 | { |
| 163 | |
Jean Pihet | c165a14 | 2013-01-26 00:58:13 -0700 | [diff] [blame] | 164 | int prev, next, state, trace_state = 0; |
Peter 'p2' De Schrijver | ba20bb1 | 2008-10-15 17:48:43 +0300 | [diff] [blame] | 165 | |
| 166 | if (pwrdm == NULL) |
| 167 | return -EINVAL; |
| 168 | |
| 169 | state = pwrdm_read_pwrst(pwrdm); |
| 170 | |
| 171 | switch (flag) { |
| 172 | case PWRDM_STATE_NOW: |
| 173 | prev = pwrdm->state; |
| 174 | break; |
| 175 | case PWRDM_STATE_PREV: |
| 176 | prev = pwrdm_read_prev_pwrst(pwrdm); |
| 177 | if (pwrdm->state != prev) |
| 178 | pwrdm->state_counter[prev]++; |
Thara Gopinath | cde08f8 | 2010-02-24 12:05:50 -0700 | [diff] [blame] | 179 | if (prev == PWRDM_POWER_RET) |
| 180 | _update_logic_membank_counters(pwrdm); |
Jean Pihet | 5e7c58d | 2011-03-03 11:25:43 +0100 | [diff] [blame] | 181 | /* |
| 182 | * If the power domain did not hit the desired state, |
| 183 | * generate a trace event with both the desired and hit states |
| 184 | */ |
Jean Pihet | c165a14 | 2013-01-26 00:58:13 -0700 | [diff] [blame] | 185 | next = pwrdm_read_next_pwrst(pwrdm); |
| 186 | if (next != prev) { |
Jean Pihet | 5e7c58d | 2011-03-03 11:25:43 +0100 | [diff] [blame] | 187 | trace_state = (PWRDM_TRACE_STATES_FLAG | |
Jean Pihet | c165a14 | 2013-01-26 00:58:13 -0700 | [diff] [blame] | 188 | ((next & OMAP_POWERSTATE_MASK) << 8) | |
Jean Pihet | 5e7c58d | 2011-03-03 11:25:43 +0100 | [diff] [blame] | 189 | ((prev & OMAP_POWERSTATE_MASK) << 0)); |
Paul E. McKenney | 0b9a29a | 2016-04-24 14:30:16 -0700 | [diff] [blame] | 190 | trace_power_domain_target_rcuidle(pwrdm->name, |
| 191 | trace_state, |
Tero Kristo | 33e9572 | 2018-03-09 11:50:20 +0200 | [diff] [blame] | 192 | raw_smp_processor_id()); |
Jean Pihet | 5e7c58d | 2011-03-03 11:25:43 +0100 | [diff] [blame] | 193 | } |
Peter 'p2' De Schrijver | ba20bb1 | 2008-10-15 17:48:43 +0300 | [diff] [blame] | 194 | break; |
| 195 | default: |
| 196 | return -EINVAL; |
| 197 | } |
| 198 | |
| 199 | if (state != prev) |
| 200 | pwrdm->state_counter[state]++; |
| 201 | |
Peter 'p2' De Schrijver | 6199ab2 | 2008-10-15 18:13:49 +0300 | [diff] [blame] | 202 | pm_dbg_update_time(pwrdm, prev); |
| 203 | |
Peter 'p2' De Schrijver | ba20bb1 | 2008-10-15 17:48:43 +0300 | [diff] [blame] | 204 | pwrdm->state = state; |
| 205 | |
| 206 | return 0; |
| 207 | } |
| 208 | |
Peter 'p2' De Schrijver | 6199ab2 | 2008-10-15 18:13:49 +0300 | [diff] [blame] | 209 | static int _pwrdm_pre_transition_cb(struct powerdomain *pwrdm, void *unused) |
Peter 'p2' De Schrijver | ba20bb1 | 2008-10-15 17:48:43 +0300 | [diff] [blame] | 210 | { |
| 211 | pwrdm_clear_all_prev_pwrst(pwrdm); |
| 212 | _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW); |
| 213 | return 0; |
| 214 | } |
| 215 | |
Peter 'p2' De Schrijver | 6199ab2 | 2008-10-15 18:13:49 +0300 | [diff] [blame] | 216 | static int _pwrdm_post_transition_cb(struct powerdomain *pwrdm, void *unused) |
Peter 'p2' De Schrijver | ba20bb1 | 2008-10-15 17:48:43 +0300 | [diff] [blame] | 217 | { |
| 218 | _pwrdm_state_switch(pwrdm, PWRDM_STATE_PREV); |
| 219 | return 0; |
| 220 | } |
| 221 | |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 222 | /** |
| 223 | * _pwrdm_save_clkdm_state_and_activate - prepare for power state change |
| 224 | * @pwrdm: struct powerdomain * to operate on |
| 225 | * @curr_pwrst: current power state of @pwrdm |
| 226 | * @pwrst: power state to switch to |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 227 | * |
| 228 | * Determine whether the powerdomain needs to be turned on before |
| 229 | * attempting to switch power states. Called by |
| 230 | * omap_set_pwrdm_state(). NOTE that if the powerdomain contains |
| 231 | * multiple clockdomains, this code assumes that the first clockdomain |
| 232 | * supports software-supervised wakeup mode - potentially a problem. |
| 233 | * Returns the power state switch mode currently in use (see the |
| 234 | * "Types of sleep_switch" comment above). |
| 235 | */ |
| 236 | static u8 _pwrdm_save_clkdm_state_and_activate(struct powerdomain *pwrdm, |
Tero Kristo | 1d9a542 | 2016-06-30 16:15:02 +0300 | [diff] [blame] | 237 | u8 curr_pwrst, u8 pwrst) |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 238 | { |
| 239 | u8 sleep_switch; |
| 240 | |
Paul Walmsley | bd70f6e | 2013-03-31 20:22:22 -0600 | [diff] [blame] | 241 | if (curr_pwrst < PWRDM_POWER_ON) { |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 242 | if (curr_pwrst > pwrst && |
| 243 | pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE && |
| 244 | arch_pwrdm->pwrdm_set_lowpwrstchange) { |
| 245 | sleep_switch = LOWPOWERSTATE_SWITCH; |
| 246 | } else { |
Tero Kristo | 1d9a542 | 2016-06-30 16:15:02 +0300 | [diff] [blame] | 247 | clkdm_deny_idle_nolock(pwrdm->pwrdm_clkdms[0]); |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 248 | sleep_switch = FORCEWAKEUP_SWITCH; |
| 249 | } |
| 250 | } else { |
| 251 | sleep_switch = ALREADYACTIVE_SWITCH; |
| 252 | } |
| 253 | |
| 254 | return sleep_switch; |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * _pwrdm_restore_clkdm_state - restore the clkdm hwsup state after pwrst change |
| 259 | * @pwrdm: struct powerdomain * to operate on |
| 260 | * @sleep_switch: return value from _pwrdm_save_clkdm_state_and_activate() |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 261 | * |
| 262 | * Restore the clockdomain state perturbed by |
| 263 | * _pwrdm_save_clkdm_state_and_activate(), and call the power state |
| 264 | * bookkeeping code. Called by omap_set_pwrdm_state(). NOTE that if |
| 265 | * the powerdomain contains multiple clockdomains, this assumes that |
| 266 | * the first associated clockdomain supports either |
| 267 | * hardware-supervised idle control in the register, or |
| 268 | * software-supervised sleep. No return value. |
| 269 | */ |
| 270 | static void _pwrdm_restore_clkdm_state(struct powerdomain *pwrdm, |
Tero Kristo | 1d9a542 | 2016-06-30 16:15:02 +0300 | [diff] [blame] | 271 | u8 sleep_switch) |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 272 | { |
| 273 | switch (sleep_switch) { |
| 274 | case FORCEWAKEUP_SWITCH: |
Tero Kristo | 1d9a542 | 2016-06-30 16:15:02 +0300 | [diff] [blame] | 275 | clkdm_allow_idle_nolock(pwrdm->pwrdm_clkdms[0]); |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 276 | break; |
| 277 | case LOWPOWERSTATE_SWITCH: |
| 278 | if (pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE && |
| 279 | arch_pwrdm->pwrdm_set_lowpwrstchange) |
| 280 | arch_pwrdm->pwrdm_set_lowpwrstchange(pwrdm); |
Paul Walmsley | 3a09028 | 2013-01-26 00:58:16 -0700 | [diff] [blame] | 281 | pwrdm_state_switch_nolock(pwrdm); |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 282 | break; |
| 283 | } |
| 284 | } |
| 285 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 286 | /* Public functions */ |
| 287 | |
| 288 | /** |
Paul Walmsley | 129c65e | 2011-09-14 16:01:21 -0600 | [diff] [blame] | 289 | * pwrdm_register_platform_funcs - register powerdomain implementation fns |
| 290 | * @po: func pointers for arch specific implementations |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 291 | * |
Paul Walmsley | 129c65e | 2011-09-14 16:01:21 -0600 | [diff] [blame] | 292 | * Register the list of function pointers used to implement the |
| 293 | * powerdomain functions on different OMAP SoCs. Should be called |
| 294 | * before any other pwrdm_register*() function. Returns -EINVAL if |
| 295 | * @po is null, -EEXIST if platform functions have already been |
| 296 | * registered, or 0 upon success. |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 297 | */ |
Paul Walmsley | 129c65e | 2011-09-14 16:01:21 -0600 | [diff] [blame] | 298 | int pwrdm_register_platform_funcs(struct pwrdm_ops *po) |
| 299 | { |
| 300 | if (!po) |
| 301 | return -EINVAL; |
| 302 | |
| 303 | if (arch_pwrdm) |
| 304 | return -EEXIST; |
| 305 | |
| 306 | arch_pwrdm = po; |
| 307 | |
| 308 | return 0; |
| 309 | } |
| 310 | |
| 311 | /** |
| 312 | * pwrdm_register_pwrdms - register SoC powerdomains |
| 313 | * @ps: pointer to an array of struct powerdomain to register |
| 314 | * |
| 315 | * Register the powerdomains available on a particular OMAP SoC. Must |
| 316 | * be called after pwrdm_register_platform_funcs(). May be called |
| 317 | * multiple times. Returns -EACCES if called before |
| 318 | * pwrdm_register_platform_funcs(); -EINVAL if the argument @ps is |
| 319 | * null; or 0 upon success. |
| 320 | */ |
| 321 | int pwrdm_register_pwrdms(struct powerdomain **ps) |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 322 | { |
| 323 | struct powerdomain **p = NULL; |
Paul Walmsley | 129c65e | 2011-09-14 16:01:21 -0600 | [diff] [blame] | 324 | |
| 325 | if (!arch_pwrdm) |
| 326 | return -EEXIST; |
| 327 | |
| 328 | if (!ps) |
| 329 | return -EINVAL; |
| 330 | |
| 331 | for (p = ps; *p; p++) |
| 332 | _pwrdm_register(*p); |
| 333 | |
| 334 | return 0; |
| 335 | } |
| 336 | |
Keerthy | 4a6dfa4 | 2018-05-16 20:47:01 +0530 | [diff] [blame] | 337 | static int cpu_notifier(struct notifier_block *nb, unsigned long cmd, void *v) |
| 338 | { |
| 339 | switch (cmd) { |
| 340 | case CPU_CLUSTER_PM_ENTER: |
| 341 | if (enable_off_mode) |
| 342 | pwrdms_save_context(); |
| 343 | break; |
| 344 | case CPU_CLUSTER_PM_EXIT: |
| 345 | if (enable_off_mode) |
| 346 | pwrdms_restore_context(); |
| 347 | break; |
| 348 | } |
| 349 | |
| 350 | return NOTIFY_OK; |
| 351 | } |
| 352 | |
Paul Walmsley | 129c65e | 2011-09-14 16:01:21 -0600 | [diff] [blame] | 353 | /** |
| 354 | * pwrdm_complete_init - set up the powerdomain layer |
| 355 | * |
| 356 | * Do whatever is necessary to initialize registered powerdomains and |
| 357 | * powerdomain code. Currently, this programs the next power state |
| 358 | * for each powerdomain to ON. This prevents powerdomains from |
| 359 | * unexpectedly losing context or entering high wakeup latency modes |
| 360 | * with non-power-management-enabled kernels. Must be called after |
| 361 | * pwrdm_register_pwrdms(). Returns -EACCES if called before |
| 362 | * pwrdm_register_pwrdms(), or 0 upon success. |
| 363 | */ |
| 364 | int pwrdm_complete_init(void) |
| 365 | { |
Rajendra Nayak | c956b75 | 2011-08-19 16:59:39 -0600 | [diff] [blame] | 366 | struct powerdomain *temp_p; |
Keerthy | 4a6dfa4 | 2018-05-16 20:47:01 +0530 | [diff] [blame] | 367 | static struct notifier_block nb; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 368 | |
Paul Walmsley | 129c65e | 2011-09-14 16:01:21 -0600 | [diff] [blame] | 369 | if (list_empty(&pwrdm_list)) |
| 370 | return -EACCES; |
Rajendra Nayak | c956b75 | 2011-08-19 16:59:39 -0600 | [diff] [blame] | 371 | |
| 372 | list_for_each_entry(temp_p, &pwrdm_list, node) |
| 373 | pwrdm_set_next_pwrst(temp_p, PWRDM_POWER_ON); |
Paul Walmsley | 129c65e | 2011-09-14 16:01:21 -0600 | [diff] [blame] | 374 | |
Keerthy | 4a6dfa4 | 2018-05-16 20:47:01 +0530 | [diff] [blame] | 375 | /* Only AM43XX can lose pwrdm context during rtc-ddr suspend */ |
| 376 | if (soc_is_am43xx()) { |
| 377 | nb.notifier_call = cpu_notifier; |
| 378 | cpu_pm_register_notifier(&nb); |
| 379 | } |
| 380 | |
Paul Walmsley | 129c65e | 2011-09-14 16:01:21 -0600 | [diff] [blame] | 381 | return 0; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 382 | } |
| 383 | |
| 384 | /** |
Paul Walmsley | 3a09028 | 2013-01-26 00:58:16 -0700 | [diff] [blame] | 385 | * pwrdm_lock - acquire a Linux spinlock on a powerdomain |
| 386 | * @pwrdm: struct powerdomain * to lock |
| 387 | * |
| 388 | * Acquire the powerdomain spinlock on @pwrdm. No return value. |
| 389 | */ |
| 390 | void pwrdm_lock(struct powerdomain *pwrdm) |
| 391 | __acquires(&pwrdm->_lock) |
| 392 | { |
| 393 | spin_lock_irqsave(&pwrdm->_lock, pwrdm->_lock_flags); |
| 394 | } |
| 395 | |
| 396 | /** |
| 397 | * pwrdm_unlock - release a Linux spinlock on a powerdomain |
| 398 | * @pwrdm: struct powerdomain * to unlock |
| 399 | * |
| 400 | * Release the powerdomain spinlock on @pwrdm. No return value. |
| 401 | */ |
| 402 | void pwrdm_unlock(struct powerdomain *pwrdm) |
| 403 | __releases(&pwrdm->_lock) |
| 404 | { |
| 405 | spin_unlock_irqrestore(&pwrdm->_lock, pwrdm->_lock_flags); |
| 406 | } |
| 407 | |
| 408 | /** |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 409 | * pwrdm_lookup - look up a powerdomain by name, return a pointer |
| 410 | * @name: name of powerdomain |
| 411 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 412 | * Find a registered powerdomain by its name @name. Returns a pointer |
| 413 | * to the struct powerdomain if found, or NULL otherwise. |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 414 | */ |
| 415 | struct powerdomain *pwrdm_lookup(const char *name) |
| 416 | { |
| 417 | struct powerdomain *pwrdm; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 418 | |
| 419 | if (!name) |
| 420 | return NULL; |
| 421 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 422 | pwrdm = _pwrdm_lookup(name); |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 423 | |
| 424 | return pwrdm; |
| 425 | } |
| 426 | |
| 427 | /** |
Paul Walmsley | e909d62a8 | 2010-01-26 20:13:00 -0700 | [diff] [blame] | 428 | * pwrdm_for_each - call function on each registered clockdomain |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 429 | * @fn: callback function * |
| 430 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 431 | * Call the supplied function @fn for each registered powerdomain. |
| 432 | * The callback function @fn can return anything but 0 to bail out |
| 433 | * early from the iterator. Returns the last return value of the |
| 434 | * callback function, which should be 0 for success or anything else |
| 435 | * to indicate failure; or -EINVAL if the function pointer is null. |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 436 | */ |
Paul Walmsley | e909d62a8 | 2010-01-26 20:13:00 -0700 | [diff] [blame] | 437 | int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user), |
| 438 | void *user) |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 439 | { |
| 440 | struct powerdomain *temp_pwrdm; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 441 | int ret = 0; |
| 442 | |
| 443 | if (!fn) |
| 444 | return -EINVAL; |
| 445 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 446 | list_for_each_entry(temp_pwrdm, &pwrdm_list, node) { |
Peter 'p2' De Schrijver | 6199ab2 | 2008-10-15 18:13:49 +0300 | [diff] [blame] | 447 | ret = (*fn)(temp_pwrdm, user); |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 448 | if (ret) |
| 449 | break; |
| 450 | } |
Artem Bityutskiy | ee894b1 | 2009-10-01 10:01:55 +0300 | [diff] [blame] | 451 | |
| 452 | return ret; |
| 453 | } |
| 454 | |
| 455 | /** |
Paul Walmsley | 8420bb1 | 2008-08-19 11:08:44 +0300 | [diff] [blame] | 456 | * pwrdm_add_clkdm - add a clockdomain to a powerdomain |
| 457 | * @pwrdm: struct powerdomain * to add the clockdomain to |
| 458 | * @clkdm: struct clockdomain * to associate with a powerdomain |
| 459 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 460 | * Associate the clockdomain @clkdm with a powerdomain @pwrdm. This |
Paul Walmsley | 8420bb1 | 2008-08-19 11:08:44 +0300 | [diff] [blame] | 461 | * enables the use of pwrdm_for_each_clkdm(). Returns -EINVAL if |
| 462 | * presented with invalid pointers; -ENOMEM if memory could not be allocated; |
| 463 | * or 0 upon success. |
| 464 | */ |
| 465 | int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm) |
| 466 | { |
Paul Walmsley | 8420bb1 | 2008-08-19 11:08:44 +0300 | [diff] [blame] | 467 | int i; |
| 468 | int ret = -EINVAL; |
| 469 | |
| 470 | if (!pwrdm || !clkdm) |
| 471 | return -EINVAL; |
| 472 | |
Paul Walmsley | 7852ec0 | 2012-07-26 00:54:26 -0600 | [diff] [blame] | 473 | pr_debug("powerdomain: %s: associating clockdomain %s\n", |
| 474 | pwrdm->name, clkdm->name); |
Paul Walmsley | 8420bb1 | 2008-08-19 11:08:44 +0300 | [diff] [blame] | 475 | |
Paul Walmsley | 8420bb1 | 2008-08-19 11:08:44 +0300 | [diff] [blame] | 476 | for (i = 0; i < PWRDM_MAX_CLKDMS; i++) { |
| 477 | if (!pwrdm->pwrdm_clkdms[i]) |
| 478 | break; |
| 479 | #ifdef DEBUG |
| 480 | if (pwrdm->pwrdm_clkdms[i] == clkdm) { |
| 481 | ret = -EINVAL; |
| 482 | goto pac_exit; |
| 483 | } |
| 484 | #endif |
| 485 | } |
| 486 | |
| 487 | if (i == PWRDM_MAX_CLKDMS) { |
Paul Walmsley | 7852ec0 | 2012-07-26 00:54:26 -0600 | [diff] [blame] | 488 | pr_debug("powerdomain: %s: increase PWRDM_MAX_CLKDMS for clkdm %s\n", |
| 489 | pwrdm->name, clkdm->name); |
Paul Walmsley | 8420bb1 | 2008-08-19 11:08:44 +0300 | [diff] [blame] | 490 | WARN_ON(1); |
| 491 | ret = -ENOMEM; |
| 492 | goto pac_exit; |
| 493 | } |
| 494 | |
| 495 | pwrdm->pwrdm_clkdms[i] = clkdm; |
| 496 | |
| 497 | ret = 0; |
| 498 | |
| 499 | pac_exit: |
Paul Walmsley | 8420bb1 | 2008-08-19 11:08:44 +0300 | [diff] [blame] | 500 | return ret; |
| 501 | } |
| 502 | |
| 503 | /** |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 504 | * pwrdm_get_mem_bank_count - get number of memory banks in this powerdomain |
| 505 | * @pwrdm: struct powerdomain * |
| 506 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 507 | * Return the number of controllable memory banks in powerdomain @pwrdm, |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 508 | * starting with 1. Returns -EINVAL if the powerdomain pointer is null. |
| 509 | */ |
| 510 | int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm) |
| 511 | { |
| 512 | if (!pwrdm) |
| 513 | return -EINVAL; |
| 514 | |
| 515 | return pwrdm->banks; |
| 516 | } |
| 517 | |
| 518 | /** |
| 519 | * pwrdm_set_next_pwrst - set next powerdomain power state |
| 520 | * @pwrdm: struct powerdomain * to set |
| 521 | * @pwrst: one of the PWRDM_POWER_* macros |
| 522 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 523 | * Set the powerdomain @pwrdm's next power state to @pwrst. The powerdomain |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 524 | * may not enter this state immediately if the preconditions for this state |
| 525 | * have not been satisfied. Returns -EINVAL if the powerdomain pointer is |
| 526 | * null or if the power state is invalid for the powerdomin, or returns 0 |
| 527 | * upon success. |
| 528 | */ |
| 529 | int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst) |
| 530 | { |
Rajendra Nayak | f327e07 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 531 | int ret = -EINVAL; |
| 532 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 533 | if (!pwrdm) |
| 534 | return -EINVAL; |
| 535 | |
| 536 | if (!(pwrdm->pwrsts & (1 << pwrst))) |
| 537 | return -EINVAL; |
| 538 | |
Paul Walmsley | 7852ec0 | 2012-07-26 00:54:26 -0600 | [diff] [blame] | 539 | pr_debug("powerdomain: %s: setting next powerstate to %0x\n", |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 540 | pwrdm->name, pwrst); |
| 541 | |
Jean Pihet | 5e7c58d | 2011-03-03 11:25:43 +0100 | [diff] [blame] | 542 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst) { |
| 543 | /* Trace the pwrdm desired target state */ |
Paul E. McKenney | 0b9a29a | 2016-04-24 14:30:16 -0700 | [diff] [blame] | 544 | trace_power_domain_target_rcuidle(pwrdm->name, pwrst, |
Tero Kristo | 33e9572 | 2018-03-09 11:50:20 +0200 | [diff] [blame] | 545 | raw_smp_processor_id()); |
Jean Pihet | 5e7c58d | 2011-03-03 11:25:43 +0100 | [diff] [blame] | 546 | /* Program the pwrdm desired target state */ |
Rajendra Nayak | f327e07 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 547 | ret = arch_pwrdm->pwrdm_set_next_pwrst(pwrdm, pwrst); |
Jean Pihet | 5e7c58d | 2011-03-03 11:25:43 +0100 | [diff] [blame] | 548 | } |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 549 | |
Rajendra Nayak | f327e07 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 550 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 551 | } |
| 552 | |
| 553 | /** |
| 554 | * pwrdm_read_next_pwrst - get next powerdomain power state |
| 555 | * @pwrdm: struct powerdomain * to get power state |
| 556 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 557 | * Return the powerdomain @pwrdm's next power state. Returns -EINVAL |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 558 | * if the powerdomain pointer is null or returns the next power state |
| 559 | * upon success. |
| 560 | */ |
| 561 | int pwrdm_read_next_pwrst(struct powerdomain *pwrdm) |
| 562 | { |
Rajendra Nayak | f327e07 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 563 | int ret = -EINVAL; |
| 564 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 565 | if (!pwrdm) |
| 566 | return -EINVAL; |
| 567 | |
Rajendra Nayak | f327e07 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 568 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_next_pwrst) |
| 569 | ret = arch_pwrdm->pwrdm_read_next_pwrst(pwrdm); |
| 570 | |
| 571 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 572 | } |
| 573 | |
| 574 | /** |
| 575 | * pwrdm_read_pwrst - get current powerdomain power state |
| 576 | * @pwrdm: struct powerdomain * to get power state |
| 577 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 578 | * Return the powerdomain @pwrdm's current power state. Returns -EINVAL |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 579 | * if the powerdomain pointer is null or returns the current power state |
Jon Hunter | d49cae9 | 2012-06-29 16:04:52 -0500 | [diff] [blame] | 580 | * upon success. Note that if the power domain only supports the ON state |
| 581 | * then just return ON as the current state. |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 582 | */ |
| 583 | int pwrdm_read_pwrst(struct powerdomain *pwrdm) |
| 584 | { |
Rajendra Nayak | f327e07 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 585 | int ret = -EINVAL; |
| 586 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 587 | if (!pwrdm) |
| 588 | return -EINVAL; |
| 589 | |
Jon Hunter | d49cae9 | 2012-06-29 16:04:52 -0500 | [diff] [blame] | 590 | if (pwrdm->pwrsts == PWRSTS_ON) |
| 591 | return PWRDM_POWER_ON; |
| 592 | |
Rajendra Nayak | f327e07 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 593 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_pwrst) |
| 594 | ret = arch_pwrdm->pwrdm_read_pwrst(pwrdm); |
| 595 | |
| 596 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 597 | } |
| 598 | |
| 599 | /** |
| 600 | * pwrdm_read_prev_pwrst - get previous powerdomain power state |
| 601 | * @pwrdm: struct powerdomain * to get previous power state |
| 602 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 603 | * Return the powerdomain @pwrdm's previous power state. Returns -EINVAL |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 604 | * if the powerdomain pointer is null or returns the previous power state |
| 605 | * upon success. |
| 606 | */ |
| 607 | int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm) |
| 608 | { |
Rajendra Nayak | f327e07 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 609 | int ret = -EINVAL; |
| 610 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 611 | if (!pwrdm) |
| 612 | return -EINVAL; |
| 613 | |
Rajendra Nayak | f327e07 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 614 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_pwrst) |
| 615 | ret = arch_pwrdm->pwrdm_read_prev_pwrst(pwrdm); |
| 616 | |
| 617 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 618 | } |
| 619 | |
| 620 | /** |
| 621 | * pwrdm_set_logic_retst - set powerdomain logic power state upon retention |
| 622 | * @pwrdm: struct powerdomain * to set |
| 623 | * @pwrst: one of the PWRDM_POWER_* macros |
| 624 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 625 | * Set the next power state @pwrst that the logic portion of the |
| 626 | * powerdomain @pwrdm will enter when the powerdomain enters retention. |
| 627 | * This will be either RETENTION or OFF, if supported. Returns |
| 628 | * -EINVAL if the powerdomain pointer is null or the target power |
| 629 | * state is not not supported, or returns 0 upon success. |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 630 | */ |
| 631 | int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) |
| 632 | { |
Rajendra Nayak | 1262757 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 633 | int ret = -EINVAL; |
Paul Walmsley | 2bc4ef7 | 2010-05-18 18:47:24 -0600 | [diff] [blame] | 634 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 635 | if (!pwrdm) |
| 636 | return -EINVAL; |
| 637 | |
| 638 | if (!(pwrdm->pwrsts_logic_ret & (1 << pwrst))) |
| 639 | return -EINVAL; |
| 640 | |
Paul Walmsley | 7852ec0 | 2012-07-26 00:54:26 -0600 | [diff] [blame] | 641 | pr_debug("powerdomain: %s: setting next logic powerstate to %0x\n", |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 642 | pwrdm->name, pwrst); |
| 643 | |
Rajendra Nayak | 1262757 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 644 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_logic_retst) |
| 645 | ret = arch_pwrdm->pwrdm_set_logic_retst(pwrdm, pwrst); |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 646 | |
Rajendra Nayak | 1262757 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 647 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 648 | } |
| 649 | |
| 650 | /** |
| 651 | * pwrdm_set_mem_onst - set memory power state while powerdomain ON |
| 652 | * @pwrdm: struct powerdomain * to set |
| 653 | * @bank: memory bank number to set (0-3) |
| 654 | * @pwrst: one of the PWRDM_POWER_* macros |
| 655 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 656 | * Set the next power state @pwrst that memory bank @bank of the |
| 657 | * powerdomain @pwrdm will enter when the powerdomain enters the ON |
| 658 | * state. @bank will be a number from 0 to 3, and represents different |
| 659 | * types of memory, depending on the powerdomain. Returns -EINVAL if |
| 660 | * the powerdomain pointer is null or the target power state is not |
| 661 | * not supported for this memory bank, -EEXIST if the target memory |
| 662 | * bank does not exist or is not controllable, or returns 0 upon |
| 663 | * success. |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 664 | */ |
| 665 | int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) |
| 666 | { |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 667 | int ret = -EINVAL; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 668 | |
| 669 | if (!pwrdm) |
| 670 | return -EINVAL; |
| 671 | |
| 672 | if (pwrdm->banks < (bank + 1)) |
| 673 | return -EEXIST; |
| 674 | |
| 675 | if (!(pwrdm->pwrsts_mem_on[bank] & (1 << pwrst))) |
| 676 | return -EINVAL; |
| 677 | |
Paul Walmsley | 7852ec0 | 2012-07-26 00:54:26 -0600 | [diff] [blame] | 678 | pr_debug("powerdomain: %s: setting next memory powerstate for bank %0x while pwrdm-ON to %0x\n", |
| 679 | pwrdm->name, bank, pwrst); |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 680 | |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 681 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_onst) |
| 682 | ret = arch_pwrdm->pwrdm_set_mem_onst(pwrdm, bank, pwrst); |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 683 | |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 684 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 685 | } |
| 686 | |
| 687 | /** |
| 688 | * pwrdm_set_mem_retst - set memory power state while powerdomain in RET |
| 689 | * @pwrdm: struct powerdomain * to set |
| 690 | * @bank: memory bank number to set (0-3) |
| 691 | * @pwrst: one of the PWRDM_POWER_* macros |
| 692 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 693 | * Set the next power state @pwrst that memory bank @bank of the |
| 694 | * powerdomain @pwrdm will enter when the powerdomain enters the |
| 695 | * RETENTION state. Bank will be a number from 0 to 3, and represents |
| 696 | * different types of memory, depending on the powerdomain. @pwrst |
| 697 | * will be either RETENTION or OFF, if supported. Returns -EINVAL if |
| 698 | * the powerdomain pointer is null or the target power state is not |
| 699 | * not supported for this memory bank, -EEXIST if the target memory |
| 700 | * bank does not exist or is not controllable, or returns 0 upon |
| 701 | * success. |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 702 | */ |
| 703 | int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) |
| 704 | { |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 705 | int ret = -EINVAL; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 706 | |
| 707 | if (!pwrdm) |
| 708 | return -EINVAL; |
| 709 | |
| 710 | if (pwrdm->banks < (bank + 1)) |
| 711 | return -EEXIST; |
| 712 | |
| 713 | if (!(pwrdm->pwrsts_mem_ret[bank] & (1 << pwrst))) |
| 714 | return -EINVAL; |
| 715 | |
Paul Walmsley | 7852ec0 | 2012-07-26 00:54:26 -0600 | [diff] [blame] | 716 | pr_debug("powerdomain: %s: setting next memory powerstate for bank %0x while pwrdm-RET to %0x\n", |
| 717 | pwrdm->name, bank, pwrst); |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 718 | |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 719 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_retst) |
| 720 | ret = arch_pwrdm->pwrdm_set_mem_retst(pwrdm, bank, pwrst); |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 721 | |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 722 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 723 | } |
| 724 | |
| 725 | /** |
| 726 | * pwrdm_read_logic_pwrst - get current powerdomain logic retention power state |
| 727 | * @pwrdm: struct powerdomain * to get current logic retention power state |
| 728 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 729 | * Return the power state that the logic portion of powerdomain @pwrdm |
| 730 | * will enter when the powerdomain enters retention. Returns -EINVAL |
| 731 | * if the powerdomain pointer is null or returns the logic retention |
| 732 | * power state upon success. |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 733 | */ |
| 734 | int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm) |
| 735 | { |
Rajendra Nayak | 1262757 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 736 | int ret = -EINVAL; |
| 737 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 738 | if (!pwrdm) |
| 739 | return -EINVAL; |
| 740 | |
Rajendra Nayak | 1262757 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 741 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_logic_pwrst) |
| 742 | ret = arch_pwrdm->pwrdm_read_logic_pwrst(pwrdm); |
| 743 | |
| 744 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 745 | } |
| 746 | |
| 747 | /** |
| 748 | * pwrdm_read_prev_logic_pwrst - get previous powerdomain logic power state |
| 749 | * @pwrdm: struct powerdomain * to get previous logic power state |
| 750 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 751 | * Return the powerdomain @pwrdm's previous logic power state. Returns |
| 752 | * -EINVAL if the powerdomain pointer is null or returns the previous |
| 753 | * logic power state upon success. |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 754 | */ |
| 755 | int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm) |
| 756 | { |
Rajendra Nayak | 1262757 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 757 | int ret = -EINVAL; |
| 758 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 759 | if (!pwrdm) |
| 760 | return -EINVAL; |
| 761 | |
Rajendra Nayak | 1262757 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 762 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_logic_pwrst) |
| 763 | ret = arch_pwrdm->pwrdm_read_prev_logic_pwrst(pwrdm); |
| 764 | |
| 765 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 766 | } |
| 767 | |
| 768 | /** |
Thara Gopinath | 1e3d0d2 | 2010-02-24 12:05:49 -0700 | [diff] [blame] | 769 | * pwrdm_read_logic_retst - get next powerdomain logic power state |
| 770 | * @pwrdm: struct powerdomain * to get next logic power state |
| 771 | * |
| 772 | * Return the powerdomain pwrdm's logic power state. Returns -EINVAL |
| 773 | * if the powerdomain pointer is null or returns the next logic |
| 774 | * power state upon success. |
| 775 | */ |
| 776 | int pwrdm_read_logic_retst(struct powerdomain *pwrdm) |
| 777 | { |
Rajendra Nayak | 1262757 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 778 | int ret = -EINVAL; |
| 779 | |
Thara Gopinath | 1e3d0d2 | 2010-02-24 12:05:49 -0700 | [diff] [blame] | 780 | if (!pwrdm) |
| 781 | return -EINVAL; |
| 782 | |
Rajendra Nayak | 1262757 | 2010-12-21 20:01:18 -0700 | [diff] [blame] | 783 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_logic_retst) |
| 784 | ret = arch_pwrdm->pwrdm_read_logic_retst(pwrdm); |
| 785 | |
| 786 | return ret; |
Thara Gopinath | 1e3d0d2 | 2010-02-24 12:05:49 -0700 | [diff] [blame] | 787 | } |
| 788 | |
| 789 | /** |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 790 | * pwrdm_read_mem_pwrst - get current memory bank power state |
| 791 | * @pwrdm: struct powerdomain * to get current memory bank power state |
| 792 | * @bank: memory bank number (0-3) |
| 793 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 794 | * Return the powerdomain @pwrdm's current memory power state for bank |
| 795 | * @bank. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 796 | * the target memory bank does not exist or is not controllable, or |
| 797 | * returns the current memory power state upon success. |
| 798 | */ |
| 799 | int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank) |
| 800 | { |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 801 | int ret = -EINVAL; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 802 | |
| 803 | if (!pwrdm) |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 804 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 805 | |
| 806 | if (pwrdm->banks < (bank + 1)) |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 807 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 808 | |
Thara Gopinath | 3863c74 | 2009-12-08 16:33:15 -0700 | [diff] [blame] | 809 | if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK) |
| 810 | bank = 1; |
| 811 | |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 812 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_pwrst) |
| 813 | ret = arch_pwrdm->pwrdm_read_mem_pwrst(pwrdm, bank); |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 814 | |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 815 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 816 | } |
| 817 | |
| 818 | /** |
| 819 | * pwrdm_read_prev_mem_pwrst - get previous memory bank power state |
| 820 | * @pwrdm: struct powerdomain * to get previous memory bank power state |
| 821 | * @bank: memory bank number (0-3) |
| 822 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 823 | * Return the powerdomain @pwrdm's previous memory power state for |
| 824 | * bank @bank. Returns -EINVAL if the powerdomain pointer is null, |
| 825 | * -EEXIST if the target memory bank does not exist or is not |
| 826 | * controllable, or returns the previous memory power state upon |
| 827 | * success. |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 828 | */ |
| 829 | int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank) |
| 830 | { |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 831 | int ret = -EINVAL; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 832 | |
| 833 | if (!pwrdm) |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 834 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 835 | |
| 836 | if (pwrdm->banks < (bank + 1)) |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 837 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 838 | |
Thara Gopinath | 3863c74 | 2009-12-08 16:33:15 -0700 | [diff] [blame] | 839 | if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK) |
| 840 | bank = 1; |
| 841 | |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 842 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_mem_pwrst) |
| 843 | ret = arch_pwrdm->pwrdm_read_prev_mem_pwrst(pwrdm, bank); |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 844 | |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 845 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 846 | } |
| 847 | |
| 848 | /** |
Thara Gopinath | 1e3d0d2 | 2010-02-24 12:05:49 -0700 | [diff] [blame] | 849 | * pwrdm_read_mem_retst - get next memory bank power state |
| 850 | * @pwrdm: struct powerdomain * to get mext memory bank power state |
| 851 | * @bank: memory bank number (0-3) |
| 852 | * |
| 853 | * Return the powerdomain pwrdm's next memory power state for bank |
| 854 | * x. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if |
| 855 | * the target memory bank does not exist or is not controllable, or |
| 856 | * returns the next memory power state upon success. |
| 857 | */ |
| 858 | int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank) |
| 859 | { |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 860 | int ret = -EINVAL; |
Thara Gopinath | 1e3d0d2 | 2010-02-24 12:05:49 -0700 | [diff] [blame] | 861 | |
| 862 | if (!pwrdm) |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 863 | return ret; |
Thara Gopinath | 1e3d0d2 | 2010-02-24 12:05:49 -0700 | [diff] [blame] | 864 | |
| 865 | if (pwrdm->banks < (bank + 1)) |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 866 | return ret; |
Thara Gopinath | 1e3d0d2 | 2010-02-24 12:05:49 -0700 | [diff] [blame] | 867 | |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 868 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_retst) |
| 869 | ret = arch_pwrdm->pwrdm_read_mem_retst(pwrdm, bank); |
Thara Gopinath | 1e3d0d2 | 2010-02-24 12:05:49 -0700 | [diff] [blame] | 870 | |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 871 | return ret; |
Thara Gopinath | 1e3d0d2 | 2010-02-24 12:05:49 -0700 | [diff] [blame] | 872 | } |
| 873 | |
| 874 | /** |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 875 | * pwrdm_clear_all_prev_pwrst - clear previous powerstate register for a pwrdm |
| 876 | * @pwrdm: struct powerdomain * to clear |
| 877 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 878 | * Clear the powerdomain's previous power state register @pwrdm. |
| 879 | * Clears the entire register, including logic and memory bank |
| 880 | * previous power states. Returns -EINVAL if the powerdomain pointer |
| 881 | * is null, or returns 0 upon success. |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 882 | */ |
| 883 | int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm) |
| 884 | { |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 885 | int ret = -EINVAL; |
| 886 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 887 | if (!pwrdm) |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 888 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 889 | |
| 890 | /* |
| 891 | * XXX should get the powerdomain's current state here; |
| 892 | * warn & fail if it is not ON. |
| 893 | */ |
| 894 | |
Paul Walmsley | 7852ec0 | 2012-07-26 00:54:26 -0600 | [diff] [blame] | 895 | pr_debug("powerdomain: %s: clearing previous power state reg\n", |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 896 | pwrdm->name); |
| 897 | |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 898 | if (arch_pwrdm && arch_pwrdm->pwrdm_clear_all_prev_pwrst) |
| 899 | ret = arch_pwrdm->pwrdm_clear_all_prev_pwrst(pwrdm); |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 900 | |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 901 | return ret; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 902 | } |
| 903 | |
| 904 | /** |
Paul Walmsley | 0b7cbfb | 2008-06-25 18:09:37 -0600 | [diff] [blame] | 905 | * pwrdm_enable_hdwr_sar - enable automatic hardware SAR for a pwrdm |
| 906 | * @pwrdm: struct powerdomain * |
| 907 | * |
| 908 | * Enable automatic context save-and-restore upon power state change |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 909 | * for some devices in the powerdomain @pwrdm. Warning: this only |
| 910 | * affects a subset of devices in a powerdomain; check the TRM |
| 911 | * closely. Returns -EINVAL if the powerdomain pointer is null or if |
| 912 | * the powerdomain does not support automatic save-and-restore, or |
| 913 | * returns 0 upon success. |
Paul Walmsley | 0b7cbfb | 2008-06-25 18:09:37 -0600 | [diff] [blame] | 914 | */ |
| 915 | int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm) |
| 916 | { |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 917 | int ret = -EINVAL; |
| 918 | |
Paul Walmsley | 0b7cbfb | 2008-06-25 18:09:37 -0600 | [diff] [blame] | 919 | if (!pwrdm) |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 920 | return ret; |
Paul Walmsley | 0b7cbfb | 2008-06-25 18:09:37 -0600 | [diff] [blame] | 921 | |
| 922 | if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR)) |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 923 | return ret; |
Paul Walmsley | 0b7cbfb | 2008-06-25 18:09:37 -0600 | [diff] [blame] | 924 | |
Paul Walmsley | 7852ec0 | 2012-07-26 00:54:26 -0600 | [diff] [blame] | 925 | pr_debug("powerdomain: %s: setting SAVEANDRESTORE bit\n", pwrdm->name); |
Paul Walmsley | 0b7cbfb | 2008-06-25 18:09:37 -0600 | [diff] [blame] | 926 | |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 927 | if (arch_pwrdm && arch_pwrdm->pwrdm_enable_hdwr_sar) |
| 928 | ret = arch_pwrdm->pwrdm_enable_hdwr_sar(pwrdm); |
Paul Walmsley | 0b7cbfb | 2008-06-25 18:09:37 -0600 | [diff] [blame] | 929 | |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 930 | return ret; |
Paul Walmsley | 0b7cbfb | 2008-06-25 18:09:37 -0600 | [diff] [blame] | 931 | } |
| 932 | |
| 933 | /** |
| 934 | * pwrdm_disable_hdwr_sar - disable automatic hardware SAR for a pwrdm |
| 935 | * @pwrdm: struct powerdomain * |
| 936 | * |
| 937 | * Disable automatic context save-and-restore upon power state change |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 938 | * for some devices in the powerdomain @pwrdm. Warning: this only |
| 939 | * affects a subset of devices in a powerdomain; check the TRM |
| 940 | * closely. Returns -EINVAL if the powerdomain pointer is null or if |
| 941 | * the powerdomain does not support automatic save-and-restore, or |
| 942 | * returns 0 upon success. |
Paul Walmsley | 0b7cbfb | 2008-06-25 18:09:37 -0600 | [diff] [blame] | 943 | */ |
| 944 | int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm) |
| 945 | { |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 946 | int ret = -EINVAL; |
| 947 | |
Paul Walmsley | 0b7cbfb | 2008-06-25 18:09:37 -0600 | [diff] [blame] | 948 | if (!pwrdm) |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 949 | return ret; |
Paul Walmsley | 0b7cbfb | 2008-06-25 18:09:37 -0600 | [diff] [blame] | 950 | |
| 951 | if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR)) |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 952 | return ret; |
Paul Walmsley | 0b7cbfb | 2008-06-25 18:09:37 -0600 | [diff] [blame] | 953 | |
Paul Walmsley | 7852ec0 | 2012-07-26 00:54:26 -0600 | [diff] [blame] | 954 | pr_debug("powerdomain: %s: clearing SAVEANDRESTORE bit\n", pwrdm->name); |
Paul Walmsley | 0b7cbfb | 2008-06-25 18:09:37 -0600 | [diff] [blame] | 955 | |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 956 | if (arch_pwrdm && arch_pwrdm->pwrdm_disable_hdwr_sar) |
| 957 | ret = arch_pwrdm->pwrdm_disable_hdwr_sar(pwrdm); |
Paul Walmsley | 0b7cbfb | 2008-06-25 18:09:37 -0600 | [diff] [blame] | 958 | |
Rajendra Nayak | 9b7fc90 | 2010-12-21 20:01:19 -0700 | [diff] [blame] | 959 | return ret; |
Paul Walmsley | 0b7cbfb | 2008-06-25 18:09:37 -0600 | [diff] [blame] | 960 | } |
| 961 | |
| 962 | /** |
| 963 | * pwrdm_has_hdwr_sar - test whether powerdomain supports hardware SAR |
| 964 | * @pwrdm: struct powerdomain * |
| 965 | * |
Paul Walmsley | f0271d6 | 2010-01-26 20:13:02 -0700 | [diff] [blame] | 966 | * Returns 1 if powerdomain @pwrdm supports hardware save-and-restore |
Paul Walmsley | 0b7cbfb | 2008-06-25 18:09:37 -0600 | [diff] [blame] | 967 | * for some devices, or 0 if it does not. |
| 968 | */ |
| 969 | bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm) |
| 970 | { |
| 971 | return (pwrdm && pwrdm->flags & PWRDM_HAS_HDWR_SAR) ? 1 : 0; |
| 972 | } |
| 973 | |
Paul Walmsley | 3a09028 | 2013-01-26 00:58:16 -0700 | [diff] [blame] | 974 | int pwrdm_state_switch_nolock(struct powerdomain *pwrdm) |
Peter 'p2' De Schrijver | ba20bb1 | 2008-10-15 17:48:43 +0300 | [diff] [blame] | 975 | { |
Santosh Shilimkar | 8b8c3c7 | 2012-03-12 20:04:32 +0530 | [diff] [blame] | 976 | int ret; |
| 977 | |
Paul Walmsley | f8457c2 | 2013-01-26 00:58:15 -0700 | [diff] [blame] | 978 | if (!pwrdm || !arch_pwrdm) |
| 979 | return -EINVAL; |
| 980 | |
| 981 | ret = arch_pwrdm->pwrdm_wait_transition(pwrdm); |
Santosh Shilimkar | 8b8c3c7 | 2012-03-12 20:04:32 +0530 | [diff] [blame] | 982 | if (!ret) |
| 983 | ret = _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW); |
| 984 | |
| 985 | return ret; |
Peter 'p2' De Schrijver | ba20bb1 | 2008-10-15 17:48:43 +0300 | [diff] [blame] | 986 | } |
| 987 | |
Paul Walmsley | 3a09028 | 2013-01-26 00:58:16 -0700 | [diff] [blame] | 988 | int __deprecated pwrdm_state_switch(struct powerdomain *pwrdm) |
| 989 | { |
| 990 | int ret; |
| 991 | |
| 992 | pwrdm_lock(pwrdm); |
| 993 | ret = pwrdm_state_switch_nolock(pwrdm); |
| 994 | pwrdm_unlock(pwrdm); |
| 995 | |
| 996 | return ret; |
| 997 | } |
| 998 | |
Kevin Hilman | e055548 | 2012-05-11 16:00:24 -0700 | [diff] [blame] | 999 | int pwrdm_pre_transition(struct powerdomain *pwrdm) |
Peter 'p2' De Schrijver | ba20bb1 | 2008-10-15 17:48:43 +0300 | [diff] [blame] | 1000 | { |
Kevin Hilman | e055548 | 2012-05-11 16:00:24 -0700 | [diff] [blame] | 1001 | if (pwrdm) |
| 1002 | _pwrdm_pre_transition_cb(pwrdm, NULL); |
| 1003 | else |
| 1004 | pwrdm_for_each(_pwrdm_pre_transition_cb, NULL); |
| 1005 | |
Peter 'p2' De Schrijver | ba20bb1 | 2008-10-15 17:48:43 +0300 | [diff] [blame] | 1006 | return 0; |
| 1007 | } |
| 1008 | |
Kevin Hilman | e055548 | 2012-05-11 16:00:24 -0700 | [diff] [blame] | 1009 | int pwrdm_post_transition(struct powerdomain *pwrdm) |
Peter 'p2' De Schrijver | ba20bb1 | 2008-10-15 17:48:43 +0300 | [diff] [blame] | 1010 | { |
Kevin Hilman | e055548 | 2012-05-11 16:00:24 -0700 | [diff] [blame] | 1011 | if (pwrdm) |
| 1012 | _pwrdm_post_transition_cb(pwrdm, NULL); |
| 1013 | else |
| 1014 | pwrdm_for_each(_pwrdm_post_transition_cb, NULL); |
| 1015 | |
Peter 'p2' De Schrijver | ba20bb1 | 2008-10-15 17:48:43 +0300 | [diff] [blame] | 1016 | return 0; |
| 1017 | } |
Kevin Hilman | 7f59567 | 2010-12-21 21:31:55 -0700 | [diff] [blame] | 1018 | |
| 1019 | /** |
Nishanth Menon | bd002d7 | 2014-06-06 01:04:20 -0500 | [diff] [blame] | 1020 | * pwrdm_get_valid_lp_state() - Find best match deep power state |
| 1021 | * @pwrdm: power domain for which we want to find best match |
| 1022 | * @is_logic_state: Are we looking for logic state match here? Should |
| 1023 | * be one of PWRDM_xxx macro values |
| 1024 | * @req_state: requested power state |
| 1025 | * |
| 1026 | * Returns: closest match for requested power state. default fallback |
| 1027 | * is RET for logic state and ON for power state. |
| 1028 | * |
| 1029 | * This does a search from the power domain data looking for the |
| 1030 | * closest valid power domain state that the hardware can achieve. |
| 1031 | * PRCM definitions for PWRSTCTRL allows us to program whatever |
| 1032 | * configuration we'd like, and PRCM will actually attempt such |
| 1033 | * a transition, however if the powerdomain does not actually support it, |
| 1034 | * we endup with a hung system. The valid power domain states are already |
| 1035 | * available in our powerdomain data files. So this function tries to do |
| 1036 | * the following: |
| 1037 | * a) find if we have an exact match to the request - no issues. |
| 1038 | * b) else find if a deeper power state is possible. |
| 1039 | * c) failing which, it tries to find closest higher power state for the |
| 1040 | * request. |
| 1041 | */ |
| 1042 | u8 pwrdm_get_valid_lp_state(struct powerdomain *pwrdm, |
| 1043 | bool is_logic_state, u8 req_state) |
| 1044 | { |
| 1045 | u8 pwrdm_states = is_logic_state ? pwrdm->pwrsts_logic_ret : |
| 1046 | pwrdm->pwrsts; |
| 1047 | /* For logic, ret is highest and others, ON is highest */ |
| 1048 | u8 default_pwrst = is_logic_state ? PWRDM_POWER_RET : PWRDM_POWER_ON; |
| 1049 | u8 new_pwrst; |
| 1050 | bool found; |
| 1051 | |
| 1052 | /* If it is already supported, nothing to search */ |
| 1053 | if (pwrdm_states & BIT(req_state)) |
| 1054 | return req_state; |
| 1055 | |
| 1056 | if (!req_state) |
| 1057 | goto up_search; |
| 1058 | |
| 1059 | /* |
| 1060 | * So, we dont have a exact match |
| 1061 | * Can we get a deeper power state match? |
| 1062 | */ |
| 1063 | new_pwrst = req_state - 1; |
| 1064 | found = true; |
| 1065 | while (!(pwrdm_states & BIT(new_pwrst))) { |
| 1066 | /* No match even at OFF? Not available */ |
| 1067 | if (new_pwrst == PWRDM_POWER_OFF) { |
| 1068 | found = false; |
| 1069 | break; |
| 1070 | } |
| 1071 | new_pwrst--; |
| 1072 | } |
| 1073 | |
| 1074 | if (found) |
| 1075 | goto done; |
| 1076 | |
| 1077 | up_search: |
| 1078 | /* OK, no deeper ones, can we get a higher match? */ |
| 1079 | new_pwrst = req_state + 1; |
| 1080 | while (!(pwrdm_states & BIT(new_pwrst))) { |
| 1081 | if (new_pwrst > PWRDM_POWER_ON) { |
| 1082 | WARN(1, "powerdomain: %s: Fix max powerstate to ON\n", |
| 1083 | pwrdm->name); |
| 1084 | return PWRDM_POWER_ON; |
| 1085 | } |
| 1086 | |
| 1087 | if (new_pwrst == default_pwrst) |
| 1088 | break; |
| 1089 | new_pwrst++; |
| 1090 | } |
| 1091 | done: |
| 1092 | return new_pwrst; |
| 1093 | } |
| 1094 | |
| 1095 | /** |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 1096 | * omap_set_pwrdm_state - change a powerdomain's current power state |
| 1097 | * @pwrdm: struct powerdomain * to change the power state of |
| 1098 | * @pwrst: power state to change to |
| 1099 | * |
| 1100 | * Change the current hardware power state of the powerdomain |
| 1101 | * represented by @pwrdm to the power state represented by @pwrst. |
| 1102 | * Returns -EINVAL if @pwrdm is null or invalid or if the |
| 1103 | * powerdomain's current power state could not be read, or returns 0 |
| 1104 | * upon success or if @pwrdm does not support @pwrst or any |
| 1105 | * lower-power state. XXX Should not return 0 if the @pwrdm does not |
| 1106 | * support @pwrst or any lower-power state: this should be an error. |
| 1107 | */ |
| 1108 | int omap_set_pwrdm_state(struct powerdomain *pwrdm, u8 pwrst) |
| 1109 | { |
Paul Walmsley | bd70f6e | 2013-03-31 20:22:22 -0600 | [diff] [blame] | 1110 | u8 next_pwrst, sleep_switch; |
| 1111 | int curr_pwrst; |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 1112 | int ret = 0; |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 1113 | |
| 1114 | if (!pwrdm || IS_ERR(pwrdm)) |
| 1115 | return -EINVAL; |
| 1116 | |
| 1117 | while (!(pwrdm->pwrsts & (1 << pwrst))) { |
| 1118 | if (pwrst == PWRDM_POWER_OFF) |
| 1119 | return ret; |
| 1120 | pwrst--; |
| 1121 | } |
| 1122 | |
Paul Walmsley | 3a09028 | 2013-01-26 00:58:16 -0700 | [diff] [blame] | 1123 | pwrdm_lock(pwrdm); |
| 1124 | |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 1125 | curr_pwrst = pwrdm_read_pwrst(pwrdm); |
Paul Walmsley | bd70f6e | 2013-03-31 20:22:22 -0600 | [diff] [blame] | 1126 | if (curr_pwrst < 0) { |
| 1127 | ret = -EINVAL; |
| 1128 | goto osps_out; |
| 1129 | } |
| 1130 | |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 1131 | next_pwrst = pwrdm_read_next_pwrst(pwrdm); |
| 1132 | if (curr_pwrst == pwrst && next_pwrst == pwrst) |
Paul Walmsley | 3a09028 | 2013-01-26 00:58:16 -0700 | [diff] [blame] | 1133 | goto osps_out; |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 1134 | |
| 1135 | sleep_switch = _pwrdm_save_clkdm_state_and_activate(pwrdm, curr_pwrst, |
Tero Kristo | 1d9a542 | 2016-06-30 16:15:02 +0300 | [diff] [blame] | 1136 | pwrst); |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 1137 | |
| 1138 | ret = pwrdm_set_next_pwrst(pwrdm, pwrst); |
| 1139 | if (ret) |
| 1140 | pr_err("%s: unable to set power state of powerdomain: %s\n", |
| 1141 | __func__, pwrdm->name); |
| 1142 | |
Tero Kristo | 1d9a542 | 2016-06-30 16:15:02 +0300 | [diff] [blame] | 1143 | _pwrdm_restore_clkdm_state(pwrdm, sleep_switch); |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 1144 | |
Paul Walmsley | 3a09028 | 2013-01-26 00:58:16 -0700 | [diff] [blame] | 1145 | osps_out: |
| 1146 | pwrdm_unlock(pwrdm); |
| 1147 | |
Paul Walmsley | c4978fb | 2013-01-29 13:45:09 -0700 | [diff] [blame] | 1148 | return ret; |
| 1149 | } |
| 1150 | |
| 1151 | /** |
Kevin Hilman | 7f59567 | 2010-12-21 21:31:55 -0700 | [diff] [blame] | 1152 | * pwrdm_get_context_loss_count - get powerdomain's context loss count |
| 1153 | * @pwrdm: struct powerdomain * to wait for |
| 1154 | * |
| 1155 | * Context loss count is the sum of powerdomain off-mode counter, the |
Tomi Valkeinen | fc01387 | 2011-06-09 16:56:23 +0300 | [diff] [blame] | 1156 | * logic off counter and the per-bank memory off counter. Returns negative |
Kevin Hilman | 7f59567 | 2010-12-21 21:31:55 -0700 | [diff] [blame] | 1157 | * (and WARNs) upon error, otherwise, returns the context loss count. |
| 1158 | */ |
Tomi Valkeinen | fc01387 | 2011-06-09 16:56:23 +0300 | [diff] [blame] | 1159 | int pwrdm_get_context_loss_count(struct powerdomain *pwrdm) |
Kevin Hilman | 7f59567 | 2010-12-21 21:31:55 -0700 | [diff] [blame] | 1160 | { |
| 1161 | int i, count; |
| 1162 | |
| 1163 | if (!pwrdm) { |
| 1164 | WARN(1, "powerdomain: %s: pwrdm is null\n", __func__); |
Tomi Valkeinen | fc01387 | 2011-06-09 16:56:23 +0300 | [diff] [blame] | 1165 | return -ENODEV; |
Kevin Hilman | 7f59567 | 2010-12-21 21:31:55 -0700 | [diff] [blame] | 1166 | } |
| 1167 | |
| 1168 | count = pwrdm->state_counter[PWRDM_POWER_OFF]; |
| 1169 | count += pwrdm->ret_logic_off_counter; |
| 1170 | |
| 1171 | for (i = 0; i < pwrdm->banks; i++) |
| 1172 | count += pwrdm->ret_mem_off_counter[i]; |
| 1173 | |
Tomi Valkeinen | fc01387 | 2011-06-09 16:56:23 +0300 | [diff] [blame] | 1174 | /* |
| 1175 | * Context loss count has to be a non-negative value. Clear the sign |
| 1176 | * bit to get a value range from 0 to INT_MAX. |
| 1177 | */ |
| 1178 | count &= INT_MAX; |
| 1179 | |
| 1180 | pr_debug("powerdomain: %s: context loss count = %d\n", |
Kevin Hilman | 7f59567 | 2010-12-21 21:31:55 -0700 | [diff] [blame] | 1181 | pwrdm->name, count); |
| 1182 | |
| 1183 | return count; |
| 1184 | } |
Paul Walmsley | 694606c | 2011-03-07 19:28:15 -0700 | [diff] [blame] | 1185 | |
| 1186 | /** |
| 1187 | * pwrdm_can_ever_lose_context - can this powerdomain ever lose context? |
| 1188 | * @pwrdm: struct powerdomain * |
| 1189 | * |
| 1190 | * Given a struct powerdomain * @pwrdm, returns 1 if the powerdomain |
| 1191 | * can lose either memory or logic context or if @pwrdm is invalid, or |
| 1192 | * returns 0 otherwise. This function is not concerned with how the |
| 1193 | * powerdomain registers are programmed (i.e., to go off or not); it's |
| 1194 | * concerned with whether it's ever possible for this powerdomain to |
| 1195 | * go off while some other part of the chip is active. This function |
| 1196 | * assumes that every powerdomain can go to either ON or INACTIVE. |
| 1197 | */ |
| 1198 | bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm) |
| 1199 | { |
| 1200 | int i; |
| 1201 | |
Russell King | 62f0f39 | 2013-02-24 10:55:24 +0000 | [diff] [blame] | 1202 | if (!pwrdm) { |
Paul Walmsley | 694606c | 2011-03-07 19:28:15 -0700 | [diff] [blame] | 1203 | pr_debug("powerdomain: %s: invalid powerdomain pointer\n", |
| 1204 | __func__); |
| 1205 | return 1; |
| 1206 | } |
| 1207 | |
| 1208 | if (pwrdm->pwrsts & PWRSTS_OFF) |
| 1209 | return 1; |
| 1210 | |
| 1211 | if (pwrdm->pwrsts & PWRSTS_RET) { |
| 1212 | if (pwrdm->pwrsts_logic_ret & PWRSTS_OFF) |
| 1213 | return 1; |
| 1214 | |
| 1215 | for (i = 0; i < pwrdm->banks; i++) |
| 1216 | if (pwrdm->pwrsts_mem_ret[i] & PWRSTS_OFF) |
| 1217 | return 1; |
| 1218 | } |
| 1219 | |
| 1220 | for (i = 0; i < pwrdm->banks; i++) |
| 1221 | if (pwrdm->pwrsts_mem_on[i] & PWRSTS_OFF) |
| 1222 | return 1; |
| 1223 | |
| 1224 | return 0; |
| 1225 | } |
Russ Dill | 485995b | 2018-05-16 20:47:00 +0530 | [diff] [blame] | 1226 | |
| 1227 | /** |
| 1228 | * pwrdm_save_context - save powerdomain registers |
| 1229 | * |
| 1230 | * Register state is going to be lost due to a suspend or hibernate |
| 1231 | * event. Save the powerdomain registers. |
| 1232 | */ |
| 1233 | static int pwrdm_save_context(struct powerdomain *pwrdm, void *unused) |
| 1234 | { |
| 1235 | if (arch_pwrdm && arch_pwrdm->pwrdm_save_context) |
| 1236 | arch_pwrdm->pwrdm_save_context(pwrdm); |
| 1237 | return 0; |
| 1238 | } |
| 1239 | |
| 1240 | /** |
| 1241 | * pwrdm_save_context - restore powerdomain registers |
| 1242 | * |
| 1243 | * Restore powerdomain control registers after a suspend or resume |
| 1244 | * event. |
| 1245 | */ |
| 1246 | static int pwrdm_restore_context(struct powerdomain *pwrdm, void *unused) |
| 1247 | { |
| 1248 | if (arch_pwrdm && arch_pwrdm->pwrdm_restore_context) |
| 1249 | arch_pwrdm->pwrdm_restore_context(pwrdm); |
| 1250 | return 0; |
| 1251 | } |
| 1252 | |
| 1253 | static int pwrdm_lost_power(struct powerdomain *pwrdm, void *unused) |
| 1254 | { |
| 1255 | int state; |
| 1256 | |
| 1257 | /* |
| 1258 | * Power has been lost across all powerdomains, increment the |
| 1259 | * counter. |
| 1260 | */ |
| 1261 | |
| 1262 | state = pwrdm_read_pwrst(pwrdm); |
| 1263 | if (state != PWRDM_POWER_OFF) { |
| 1264 | pwrdm->state_counter[state]++; |
| 1265 | pwrdm->state_counter[PWRDM_POWER_OFF]++; |
| 1266 | } |
| 1267 | pwrdm->state = state; |
| 1268 | |
| 1269 | return 0; |
| 1270 | } |
| 1271 | |
| 1272 | void pwrdms_save_context(void) |
| 1273 | { |
| 1274 | pwrdm_for_each(pwrdm_save_context, NULL); |
| 1275 | } |
| 1276 | |
| 1277 | void pwrdms_restore_context(void) |
| 1278 | { |
| 1279 | pwrdm_for_each(pwrdm_restore_context, NULL); |
| 1280 | } |
| 1281 | |
| 1282 | void pwrdms_lost_power(void) |
| 1283 | { |
| 1284 | pwrdm_for_each(pwrdm_lost_power, NULL); |
| 1285 | } |