Commit | Line | Data |
---|---|---|
ad67ef68 PW |
1 | /* |
2 | * OMAP powerdomain control | |
3 | * | |
129c65ee | 4 | * Copyright (C) 2007-2008, 2011 Texas Instruments, Inc. |
694606c4 | 5 | * Copyright (C) 2007-2011 Nokia Corporation |
ad67ef68 PW |
6 | * |
7 | * Written by Paul Walmsley | |
3a759f09 | 8 | * Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@ti.com> |
4788da26 | 9 | * State counting code by Tero Kristo <tero.kristo@nokia.com> |
3a759f09 | 10 | * |
ad67ef68 PW |
11 | * This program is free software; you can redistribute it and/or modify |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | */ | |
33903eb5 | 15 | #undef DEBUG |
ad67ef68 PW |
16 | |
17 | #include <linux/kernel.h> | |
ad67ef68 | 18 | #include <linux/types.h> |
ad67ef68 PW |
19 | #include <linux/list.h> |
20 | #include <linux/errno.h> | |
9b7fc907 | 21 | #include <linux/string.h> |
3a090284 | 22 | #include <linux/spinlock.h> |
5e7c58dc JP |
23 | #include <trace/events/power.h> |
24 | ||
59fb659b | 25 | #include "cm2xxx_3xxx.h" |
a64bb9cd | 26 | #include "prcm44xx.h" |
59fb659b PW |
27 | #include "cm44xx.h" |
28 | #include "prm2xxx_3xxx.h" | |
d198b514 | 29 | #include "prm44xx.h" |
ad67ef68 | 30 | |
5e7c58dc | 31 | #include <asm/cpu.h> |
dbc04161 | 32 | |
72e06d08 | 33 | #include "powerdomain.h" |
1540f214 | 34 | #include "clockdomain.h" |
ad67ef68 | 35 | |
dbc04161 | 36 | #include "soc.h" |
6199ab26 PDS |
37 | #include "pm.h" |
38 | ||
5e7c58dc JP |
39 | #define PWRDM_TRACE_STATES_FLAG (1<<31) |
40 | ||
ba20bb12 PDS |
41 | enum { |
42 | PWRDM_STATE_NOW = 0, | |
43 | PWRDM_STATE_PREV, | |
44 | }; | |
45 | ||
c4978fba PW |
46 | /* |
47 | * Types of sleep_switch used internally in omap_set_pwrdm_state() | |
48 | * and its associated static functions | |
49 | * | |
50 | * XXX Better documentation is needed here | |
51 | */ | |
52 | #define ALREADYACTIVE_SWITCH 0 | |
53 | #define FORCEWAKEUP_SWITCH 1 | |
54 | #define LOWPOWERSTATE_SWITCH 2 | |
55 | #define ERROR_SWITCH 3 | |
3a759f09 | 56 | |
ad67ef68 PW |
57 | /* pwrdm_list contains all registered struct powerdomains */ |
58 | static LIST_HEAD(pwrdm_list); | |
59 | ||
3b1e8b21 RN |
60 | static struct pwrdm_ops *arch_pwrdm; |
61 | ||
ad67ef68 PW |
62 | /* Private functions */ |
63 | ||
ad67ef68 PW |
64 | static struct powerdomain *_pwrdm_lookup(const char *name) |
65 | { | |
66 | struct powerdomain *pwrdm, *temp_pwrdm; | |
67 | ||
68 | pwrdm = NULL; | |
69 | ||
70 | list_for_each_entry(temp_pwrdm, &pwrdm_list, node) { | |
71 | if (!strcmp(name, temp_pwrdm->name)) { | |
72 | pwrdm = temp_pwrdm; | |
73 | break; | |
74 | } | |
75 | } | |
76 | ||
77 | return pwrdm; | |
78 | } | |
79 | ||
e909d62a PW |
80 | /** |
81 | * _pwrdm_register - register a powerdomain | |
82 | * @pwrdm: struct powerdomain * to register | |
83 | * | |
84 | * Adds a powerdomain to the internal powerdomain list. Returns | |
85 | * -EINVAL if given a null pointer, -EEXIST if a powerdomain is | |
86 | * already registered by the provided name, or 0 upon success. | |
87 | */ | |
88 | static int _pwrdm_register(struct powerdomain *pwrdm) | |
89 | { | |
90 | int i; | |
048a7034 | 91 | struct voltagedomain *voltdm; |
e909d62a | 92 | |
a64bb9cd | 93 | if (!pwrdm || !pwrdm->name) |
e909d62a PW |
94 | return -EINVAL; |
95 | ||
a64bb9cd PW |
96 | if (cpu_is_omap44xx() && |
97 | pwrdm->prcm_partition == OMAP4430_INVALID_PRCM_PARTITION) { | |
98 | pr_err("powerdomain: %s: missing OMAP4 PRCM partition ID\n", | |
99 | pwrdm->name); | |
100 | return -EINVAL; | |
101 | } | |
102 | ||
e909d62a PW |
103 | if (_pwrdm_lookup(pwrdm->name)) |
104 | return -EEXIST; | |
105 | ||
048a7034 KH |
106 | voltdm = voltdm_lookup(pwrdm->voltdm.name); |
107 | if (!voltdm) { | |
108 | pr_err("powerdomain: %s: voltagedomain %s does not exist\n", | |
109 | pwrdm->name, pwrdm->voltdm.name); | |
110 | return -EINVAL; | |
111 | } | |
112 | pwrdm->voltdm.ptr = voltdm; | |
e69c22b1 KH |
113 | INIT_LIST_HEAD(&pwrdm->voltdm_node); |
114 | voltdm_add_pwrdm(voltdm, pwrdm); | |
3a090284 | 115 | spin_lock_init(&pwrdm->_lock); |
048a7034 | 116 | |
e909d62a PW |
117 | list_add(&pwrdm->node, &pwrdm_list); |
118 | ||
119 | /* Initialize the powerdomain's state counter */ | |
cf57aa7c | 120 | for (i = 0; i < PWRDM_MAX_PWRSTS; i++) |
e909d62a PW |
121 | pwrdm->state_counter[i] = 0; |
122 | ||
cde08f81 TG |
123 | pwrdm->ret_logic_off_counter = 0; |
124 | for (i = 0; i < pwrdm->banks; i++) | |
125 | pwrdm->ret_mem_off_counter[i] = 0; | |
126 | ||
f8457c2d | 127 | arch_pwrdm->pwrdm_wait_transition(pwrdm); |
e909d62a PW |
128 | pwrdm->state = pwrdm_read_pwrst(pwrdm); |
129 | pwrdm->state_counter[pwrdm->state] = 1; | |
130 | ||
131 | pr_debug("powerdomain: registered %s\n", pwrdm->name); | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
cde08f81 TG |
136 | static void _update_logic_membank_counters(struct powerdomain *pwrdm) |
137 | { | |
138 | int i; | |
139 | u8 prev_logic_pwrst, prev_mem_pwrst; | |
140 | ||
141 | prev_logic_pwrst = pwrdm_read_prev_logic_pwrst(pwrdm); | |
142 | if ((pwrdm->pwrsts_logic_ret == PWRSTS_OFF_RET) && | |
143 | (prev_logic_pwrst == PWRDM_POWER_OFF)) | |
144 | pwrdm->ret_logic_off_counter++; | |
145 | ||
146 | for (i = 0; i < pwrdm->banks; i++) { | |
147 | prev_mem_pwrst = pwrdm_read_prev_mem_pwrst(pwrdm, i); | |
148 | ||
149 | if ((pwrdm->pwrsts_mem_ret[i] == PWRSTS_OFF_RET) && | |
150 | (prev_mem_pwrst == PWRDM_POWER_OFF)) | |
151 | pwrdm->ret_mem_off_counter[i]++; | |
152 | } | |
153 | } | |
154 | ||
ba20bb12 PDS |
155 | static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag) |
156 | { | |
157 | ||
c165a140 | 158 | int prev, next, state, trace_state = 0; |
ba20bb12 PDS |
159 | |
160 | if (pwrdm == NULL) | |
161 | return -EINVAL; | |
162 | ||
163 | state = pwrdm_read_pwrst(pwrdm); | |
164 | ||
165 | switch (flag) { | |
166 | case PWRDM_STATE_NOW: | |
167 | prev = pwrdm->state; | |
168 | break; | |
169 | case PWRDM_STATE_PREV: | |
170 | prev = pwrdm_read_prev_pwrst(pwrdm); | |
171 | if (pwrdm->state != prev) | |
172 | pwrdm->state_counter[prev]++; | |
cde08f81 TG |
173 | if (prev == PWRDM_POWER_RET) |
174 | _update_logic_membank_counters(pwrdm); | |
5e7c58dc JP |
175 | /* |
176 | * If the power domain did not hit the desired state, | |
177 | * generate a trace event with both the desired and hit states | |
178 | */ | |
c165a140 JP |
179 | next = pwrdm_read_next_pwrst(pwrdm); |
180 | if (next != prev) { | |
5e7c58dc | 181 | trace_state = (PWRDM_TRACE_STATES_FLAG | |
c165a140 | 182 | ((next & OMAP_POWERSTATE_MASK) << 8) | |
5e7c58dc JP |
183 | ((prev & OMAP_POWERSTATE_MASK) << 0)); |
184 | trace_power_domain_target(pwrdm->name, trace_state, | |
185 | smp_processor_id()); | |
186 | } | |
ba20bb12 PDS |
187 | break; |
188 | default: | |
189 | return -EINVAL; | |
190 | } | |
191 | ||
192 | if (state != prev) | |
193 | pwrdm->state_counter[state]++; | |
194 | ||
6199ab26 PDS |
195 | pm_dbg_update_time(pwrdm, prev); |
196 | ||
ba20bb12 PDS |
197 | pwrdm->state = state; |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
6199ab26 | 202 | static int _pwrdm_pre_transition_cb(struct powerdomain *pwrdm, void *unused) |
ba20bb12 PDS |
203 | { |
204 | pwrdm_clear_all_prev_pwrst(pwrdm); | |
205 | _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW); | |
206 | return 0; | |
207 | } | |
208 | ||
6199ab26 | 209 | static int _pwrdm_post_transition_cb(struct powerdomain *pwrdm, void *unused) |
ba20bb12 PDS |
210 | { |
211 | _pwrdm_state_switch(pwrdm, PWRDM_STATE_PREV); | |
212 | return 0; | |
213 | } | |
214 | ||
c4978fba PW |
215 | /** |
216 | * _pwrdm_save_clkdm_state_and_activate - prepare for power state change | |
217 | * @pwrdm: struct powerdomain * to operate on | |
218 | * @curr_pwrst: current power state of @pwrdm | |
219 | * @pwrst: power state to switch to | |
220 | * @hwsup: ptr to a bool to return whether the clkdm is hardware-supervised | |
221 | * | |
222 | * Determine whether the powerdomain needs to be turned on before | |
223 | * attempting to switch power states. Called by | |
224 | * omap_set_pwrdm_state(). NOTE that if the powerdomain contains | |
225 | * multiple clockdomains, this code assumes that the first clockdomain | |
226 | * supports software-supervised wakeup mode - potentially a problem. | |
227 | * Returns the power state switch mode currently in use (see the | |
228 | * "Types of sleep_switch" comment above). | |
229 | */ | |
230 | static u8 _pwrdm_save_clkdm_state_and_activate(struct powerdomain *pwrdm, | |
231 | u8 curr_pwrst, u8 pwrst, | |
232 | bool *hwsup) | |
233 | { | |
234 | u8 sleep_switch; | |
235 | ||
236 | if (curr_pwrst < 0) { | |
237 | WARN_ON(1); | |
238 | sleep_switch = ERROR_SWITCH; | |
239 | } else if (curr_pwrst < PWRDM_POWER_ON) { | |
240 | if (curr_pwrst > pwrst && | |
241 | pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE && | |
242 | arch_pwrdm->pwrdm_set_lowpwrstchange) { | |
243 | sleep_switch = LOWPOWERSTATE_SWITCH; | |
244 | } else { | |
245 | *hwsup = clkdm_in_hwsup(pwrdm->pwrdm_clkdms[0]); | |
3a090284 | 246 | clkdm_wakeup_nolock(pwrdm->pwrdm_clkdms[0]); |
c4978fba PW |
247 | sleep_switch = FORCEWAKEUP_SWITCH; |
248 | } | |
249 | } else { | |
250 | sleep_switch = ALREADYACTIVE_SWITCH; | |
251 | } | |
252 | ||
253 | return sleep_switch; | |
254 | } | |
255 | ||
256 | /** | |
257 | * _pwrdm_restore_clkdm_state - restore the clkdm hwsup state after pwrst change | |
258 | * @pwrdm: struct powerdomain * to operate on | |
259 | * @sleep_switch: return value from _pwrdm_save_clkdm_state_and_activate() | |
260 | * @hwsup: should @pwrdm's first clockdomain be set to hardware-supervised mode? | |
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, | |
271 | u8 sleep_switch, bool hwsup) | |
272 | { | |
273 | switch (sleep_switch) { | |
274 | case FORCEWAKEUP_SWITCH: | |
275 | if (hwsup) | |
3a090284 | 276 | clkdm_allow_idle_nolock(pwrdm->pwrdm_clkdms[0]); |
c4978fba | 277 | else |
3a090284 | 278 | clkdm_sleep_nolock(pwrdm->pwrdm_clkdms[0]); |
c4978fba PW |
279 | break; |
280 | case LOWPOWERSTATE_SWITCH: | |
281 | if (pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE && | |
282 | arch_pwrdm->pwrdm_set_lowpwrstchange) | |
283 | arch_pwrdm->pwrdm_set_lowpwrstchange(pwrdm); | |
3a090284 | 284 | pwrdm_state_switch_nolock(pwrdm); |
c4978fba PW |
285 | break; |
286 | } | |
287 | } | |
288 | ||
ad67ef68 PW |
289 | /* Public functions */ |
290 | ||
291 | /** | |
129c65ee PW |
292 | * pwrdm_register_platform_funcs - register powerdomain implementation fns |
293 | * @po: func pointers for arch specific implementations | |
ad67ef68 | 294 | * |
129c65ee PW |
295 | * Register the list of function pointers used to implement the |
296 | * powerdomain functions on different OMAP SoCs. Should be called | |
297 | * before any other pwrdm_register*() function. Returns -EINVAL if | |
298 | * @po is null, -EEXIST if platform functions have already been | |
299 | * registered, or 0 upon success. | |
ad67ef68 | 300 | */ |
129c65ee PW |
301 | int pwrdm_register_platform_funcs(struct pwrdm_ops *po) |
302 | { | |
303 | if (!po) | |
304 | return -EINVAL; | |
305 | ||
306 | if (arch_pwrdm) | |
307 | return -EEXIST; | |
308 | ||
309 | arch_pwrdm = po; | |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
314 | /** | |
315 | * pwrdm_register_pwrdms - register SoC powerdomains | |
316 | * @ps: pointer to an array of struct powerdomain to register | |
317 | * | |
318 | * Register the powerdomains available on a particular OMAP SoC. Must | |
319 | * be called after pwrdm_register_platform_funcs(). May be called | |
320 | * multiple times. Returns -EACCES if called before | |
321 | * pwrdm_register_platform_funcs(); -EINVAL if the argument @ps is | |
322 | * null; or 0 upon success. | |
323 | */ | |
324 | int pwrdm_register_pwrdms(struct powerdomain **ps) | |
ad67ef68 PW |
325 | { |
326 | struct powerdomain **p = NULL; | |
327 | ||
129c65ee PW |
328 | if (!arch_pwrdm) |
329 | return -EEXIST; | |
3b1e8b21 | 330 | |
129c65ee PW |
331 | if (!ps) |
332 | return -EINVAL; | |
333 | ||
334 | for (p = ps; *p; p++) | |
335 | _pwrdm_register(*p); | |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
340 | /** | |
341 | * pwrdm_complete_init - set up the powerdomain layer | |
342 | * | |
343 | * Do whatever is necessary to initialize registered powerdomains and | |
344 | * powerdomain code. Currently, this programs the next power state | |
345 | * for each powerdomain to ON. This prevents powerdomains from | |
346 | * unexpectedly losing context or entering high wakeup latency modes | |
347 | * with non-power-management-enabled kernels. Must be called after | |
348 | * pwrdm_register_pwrdms(). Returns -EACCES if called before | |
349 | * pwrdm_register_pwrdms(), or 0 upon success. | |
350 | */ | |
351 | int pwrdm_complete_init(void) | |
352 | { | |
353 | struct powerdomain *temp_p; | |
354 | ||
355 | if (list_empty(&pwrdm_list)) | |
356 | return -EACCES; | |
c956b753 RN |
357 | |
358 | list_for_each_entry(temp_p, &pwrdm_list, node) | |
359 | pwrdm_set_next_pwrst(temp_p, PWRDM_POWER_ON); | |
129c65ee PW |
360 | |
361 | return 0; | |
ad67ef68 PW |
362 | } |
363 | ||
3a090284 PW |
364 | /** |
365 | * pwrdm_lock - acquire a Linux spinlock on a powerdomain | |
366 | * @pwrdm: struct powerdomain * to lock | |
367 | * | |
368 | * Acquire the powerdomain spinlock on @pwrdm. No return value. | |
369 | */ | |
370 | void pwrdm_lock(struct powerdomain *pwrdm) | |
371 | __acquires(&pwrdm->_lock) | |
372 | { | |
373 | spin_lock_irqsave(&pwrdm->_lock, pwrdm->_lock_flags); | |
374 | } | |
375 | ||
376 | /** | |
377 | * pwrdm_unlock - release a Linux spinlock on a powerdomain | |
378 | * @pwrdm: struct powerdomain * to unlock | |
379 | * | |
380 | * Release the powerdomain spinlock on @pwrdm. No return value. | |
381 | */ | |
382 | void pwrdm_unlock(struct powerdomain *pwrdm) | |
383 | __releases(&pwrdm->_lock) | |
384 | { | |
385 | spin_unlock_irqrestore(&pwrdm->_lock, pwrdm->_lock_flags); | |
386 | } | |
387 | ||
ad67ef68 PW |
388 | /** |
389 | * pwrdm_lookup - look up a powerdomain by name, return a pointer | |
390 | * @name: name of powerdomain | |
391 | * | |
f0271d65 PW |
392 | * Find a registered powerdomain by its name @name. Returns a pointer |
393 | * to the struct powerdomain if found, or NULL otherwise. | |
ad67ef68 PW |
394 | */ |
395 | struct powerdomain *pwrdm_lookup(const char *name) | |
396 | { | |
397 | struct powerdomain *pwrdm; | |
ad67ef68 PW |
398 | |
399 | if (!name) | |
400 | return NULL; | |
401 | ||
ad67ef68 | 402 | pwrdm = _pwrdm_lookup(name); |
ad67ef68 PW |
403 | |
404 | return pwrdm; | |
405 | } | |
406 | ||
407 | /** | |
e909d62a | 408 | * pwrdm_for_each - call function on each registered clockdomain |
ad67ef68 PW |
409 | * @fn: callback function * |
410 | * | |
f0271d65 PW |
411 | * Call the supplied function @fn for each registered powerdomain. |
412 | * The callback function @fn can return anything but 0 to bail out | |
413 | * early from the iterator. Returns the last return value of the | |
414 | * callback function, which should be 0 for success or anything else | |
415 | * to indicate failure; or -EINVAL if the function pointer is null. | |
ad67ef68 | 416 | */ |
e909d62a PW |
417 | int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user), |
418 | void *user) | |
ad67ef68 PW |
419 | { |
420 | struct powerdomain *temp_pwrdm; | |
ad67ef68 PW |
421 | int ret = 0; |
422 | ||
423 | if (!fn) | |
424 | return -EINVAL; | |
425 | ||
ad67ef68 | 426 | list_for_each_entry(temp_pwrdm, &pwrdm_list, node) { |
6199ab26 | 427 | ret = (*fn)(temp_pwrdm, user); |
ad67ef68 PW |
428 | if (ret) |
429 | break; | |
430 | } | |
ee894b18 AB |
431 | |
432 | return ret; | |
433 | } | |
434 | ||
8420bb13 PW |
435 | /** |
436 | * pwrdm_add_clkdm - add a clockdomain to a powerdomain | |
437 | * @pwrdm: struct powerdomain * to add the clockdomain to | |
438 | * @clkdm: struct clockdomain * to associate with a powerdomain | |
439 | * | |
f0271d65 | 440 | * Associate the clockdomain @clkdm with a powerdomain @pwrdm. This |
8420bb13 PW |
441 | * enables the use of pwrdm_for_each_clkdm(). Returns -EINVAL if |
442 | * presented with invalid pointers; -ENOMEM if memory could not be allocated; | |
443 | * or 0 upon success. | |
444 | */ | |
445 | int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm) | |
446 | { | |
8420bb13 PW |
447 | int i; |
448 | int ret = -EINVAL; | |
449 | ||
450 | if (!pwrdm || !clkdm) | |
451 | return -EINVAL; | |
452 | ||
7852ec05 PW |
453 | pr_debug("powerdomain: %s: associating clockdomain %s\n", |
454 | pwrdm->name, clkdm->name); | |
8420bb13 | 455 | |
8420bb13 PW |
456 | for (i = 0; i < PWRDM_MAX_CLKDMS; i++) { |
457 | if (!pwrdm->pwrdm_clkdms[i]) | |
458 | break; | |
459 | #ifdef DEBUG | |
460 | if (pwrdm->pwrdm_clkdms[i] == clkdm) { | |
461 | ret = -EINVAL; | |
462 | goto pac_exit; | |
463 | } | |
464 | #endif | |
465 | } | |
466 | ||
467 | if (i == PWRDM_MAX_CLKDMS) { | |
7852ec05 PW |
468 | pr_debug("powerdomain: %s: increase PWRDM_MAX_CLKDMS for clkdm %s\n", |
469 | pwrdm->name, clkdm->name); | |
8420bb13 PW |
470 | WARN_ON(1); |
471 | ret = -ENOMEM; | |
472 | goto pac_exit; | |
473 | } | |
474 | ||
475 | pwrdm->pwrdm_clkdms[i] = clkdm; | |
476 | ||
477 | ret = 0; | |
478 | ||
479 | pac_exit: | |
8420bb13 PW |
480 | return ret; |
481 | } | |
482 | ||
483 | /** | |
484 | * pwrdm_del_clkdm - remove a clockdomain from a powerdomain | |
485 | * @pwrdm: struct powerdomain * to add the clockdomain to | |
486 | * @clkdm: struct clockdomain * to associate with a powerdomain | |
487 | * | |
f0271d65 PW |
488 | * Dissociate the clockdomain @clkdm from the powerdomain |
489 | * @pwrdm. Returns -EINVAL if presented with invalid pointers; -ENOENT | |
490 | * if @clkdm was not associated with the powerdomain, or 0 upon | |
491 | * success. | |
8420bb13 PW |
492 | */ |
493 | int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm) | |
494 | { | |
8420bb13 PW |
495 | int ret = -EINVAL; |
496 | int i; | |
497 | ||
498 | if (!pwrdm || !clkdm) | |
499 | return -EINVAL; | |
500 | ||
7852ec05 PW |
501 | pr_debug("powerdomain: %s: dissociating clockdomain %s\n", |
502 | pwrdm->name, clkdm->name); | |
8420bb13 | 503 | |
8420bb13 PW |
504 | for (i = 0; i < PWRDM_MAX_CLKDMS; i++) |
505 | if (pwrdm->pwrdm_clkdms[i] == clkdm) | |
506 | break; | |
507 | ||
508 | if (i == PWRDM_MAX_CLKDMS) { | |
7852ec05 PW |
509 | pr_debug("powerdomain: %s: clkdm %s not associated?!\n", |
510 | pwrdm->name, clkdm->name); | |
8420bb13 PW |
511 | ret = -ENOENT; |
512 | goto pdc_exit; | |
513 | } | |
514 | ||
515 | pwrdm->pwrdm_clkdms[i] = NULL; | |
516 | ||
517 | ret = 0; | |
518 | ||
519 | pdc_exit: | |
8420bb13 PW |
520 | return ret; |
521 | } | |
522 | ||
523 | /** | |
524 | * pwrdm_for_each_clkdm - call function on each clkdm in a pwrdm | |
525 | * @pwrdm: struct powerdomain * to iterate over | |
526 | * @fn: callback function * | |
527 | * | |
f0271d65 PW |
528 | * Call the supplied function @fn for each clockdomain in the powerdomain |
529 | * @pwrdm. The callback function can return anything but 0 to bail | |
e909d62a PW |
530 | * out early from the iterator. Returns -EINVAL if presented with |
531 | * invalid pointers; or passes along the last return value of the | |
532 | * callback function, which should be 0 for success or anything else | |
533 | * to indicate failure. | |
8420bb13 PW |
534 | */ |
535 | int pwrdm_for_each_clkdm(struct powerdomain *pwrdm, | |
536 | int (*fn)(struct powerdomain *pwrdm, | |
537 | struct clockdomain *clkdm)) | |
538 | { | |
8420bb13 PW |
539 | int ret = 0; |
540 | int i; | |
541 | ||
542 | if (!fn) | |
543 | return -EINVAL; | |
544 | ||
8420bb13 PW |
545 | for (i = 0; i < PWRDM_MAX_CLKDMS && !ret; i++) |
546 | ret = (*fn)(pwrdm, pwrdm->pwrdm_clkdms[i]); | |
547 | ||
8420bb13 PW |
548 | return ret; |
549 | } | |
550 | ||
048a7034 KH |
551 | /** |
552 | * pwrdm_get_voltdm - return a ptr to the voltdm that this pwrdm resides in | |
553 | * @pwrdm: struct powerdomain * | |
554 | * | |
555 | * Return a pointer to the struct voltageomain that the specified powerdomain | |
556 | * @pwrdm exists in. | |
557 | */ | |
558 | struct voltagedomain *pwrdm_get_voltdm(struct powerdomain *pwrdm) | |
559 | { | |
560 | return pwrdm->voltdm.ptr; | |
561 | } | |
562 | ||
ad67ef68 PW |
563 | /** |
564 | * pwrdm_get_mem_bank_count - get number of memory banks in this powerdomain | |
565 | * @pwrdm: struct powerdomain * | |
566 | * | |
f0271d65 | 567 | * Return the number of controllable memory banks in powerdomain @pwrdm, |
ad67ef68 PW |
568 | * starting with 1. Returns -EINVAL if the powerdomain pointer is null. |
569 | */ | |
570 | int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm) | |
571 | { | |
572 | if (!pwrdm) | |
573 | return -EINVAL; | |
574 | ||
575 | return pwrdm->banks; | |
576 | } | |
577 | ||
578 | /** | |
579 | * pwrdm_set_next_pwrst - set next powerdomain power state | |
580 | * @pwrdm: struct powerdomain * to set | |
581 | * @pwrst: one of the PWRDM_POWER_* macros | |
582 | * | |
f0271d65 | 583 | * Set the powerdomain @pwrdm's next power state to @pwrst. The powerdomain |
ad67ef68 PW |
584 | * may not enter this state immediately if the preconditions for this state |
585 | * have not been satisfied. Returns -EINVAL if the powerdomain pointer is | |
586 | * null or if the power state is invalid for the powerdomin, or returns 0 | |
587 | * upon success. | |
588 | */ | |
589 | int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst) | |
590 | { | |
f327e07b RN |
591 | int ret = -EINVAL; |
592 | ||
ad67ef68 PW |
593 | if (!pwrdm) |
594 | return -EINVAL; | |
595 | ||
596 | if (!(pwrdm->pwrsts & (1 << pwrst))) | |
597 | return -EINVAL; | |
598 | ||
7852ec05 | 599 | pr_debug("powerdomain: %s: setting next powerstate to %0x\n", |
ad67ef68 PW |
600 | pwrdm->name, pwrst); |
601 | ||
5e7c58dc JP |
602 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst) { |
603 | /* Trace the pwrdm desired target state */ | |
604 | trace_power_domain_target(pwrdm->name, pwrst, | |
605 | smp_processor_id()); | |
606 | /* Program the pwrdm desired target state */ | |
f327e07b | 607 | ret = arch_pwrdm->pwrdm_set_next_pwrst(pwrdm, pwrst); |
5e7c58dc | 608 | } |
ad67ef68 | 609 | |
f327e07b | 610 | return ret; |
ad67ef68 PW |
611 | } |
612 | ||
613 | /** | |
614 | * pwrdm_read_next_pwrst - get next powerdomain power state | |
615 | * @pwrdm: struct powerdomain * to get power state | |
616 | * | |
f0271d65 | 617 | * Return the powerdomain @pwrdm's next power state. Returns -EINVAL |
ad67ef68 PW |
618 | * if the powerdomain pointer is null or returns the next power state |
619 | * upon success. | |
620 | */ | |
621 | int pwrdm_read_next_pwrst(struct powerdomain *pwrdm) | |
622 | { | |
f327e07b RN |
623 | int ret = -EINVAL; |
624 | ||
ad67ef68 PW |
625 | if (!pwrdm) |
626 | return -EINVAL; | |
627 | ||
f327e07b RN |
628 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_next_pwrst) |
629 | ret = arch_pwrdm->pwrdm_read_next_pwrst(pwrdm); | |
630 | ||
631 | return ret; | |
ad67ef68 PW |
632 | } |
633 | ||
634 | /** | |
635 | * pwrdm_read_pwrst - get current powerdomain power state | |
636 | * @pwrdm: struct powerdomain * to get power state | |
637 | * | |
f0271d65 | 638 | * Return the powerdomain @pwrdm's current power state. Returns -EINVAL |
ad67ef68 | 639 | * if the powerdomain pointer is null or returns the current power state |
d49cae92 JH |
640 | * upon success. Note that if the power domain only supports the ON state |
641 | * then just return ON as the current state. | |
ad67ef68 PW |
642 | */ |
643 | int pwrdm_read_pwrst(struct powerdomain *pwrdm) | |
644 | { | |
f327e07b RN |
645 | int ret = -EINVAL; |
646 | ||
ad67ef68 PW |
647 | if (!pwrdm) |
648 | return -EINVAL; | |
649 | ||
d49cae92 JH |
650 | if (pwrdm->pwrsts == PWRSTS_ON) |
651 | return PWRDM_POWER_ON; | |
652 | ||
f327e07b RN |
653 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_pwrst) |
654 | ret = arch_pwrdm->pwrdm_read_pwrst(pwrdm); | |
655 | ||
656 | return ret; | |
ad67ef68 PW |
657 | } |
658 | ||
659 | /** | |
660 | * pwrdm_read_prev_pwrst - get previous powerdomain power state | |
661 | * @pwrdm: struct powerdomain * to get previous power state | |
662 | * | |
f0271d65 | 663 | * Return the powerdomain @pwrdm's previous power state. Returns -EINVAL |
ad67ef68 PW |
664 | * if the powerdomain pointer is null or returns the previous power state |
665 | * upon success. | |
666 | */ | |
667 | int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm) | |
668 | { | |
f327e07b RN |
669 | int ret = -EINVAL; |
670 | ||
ad67ef68 PW |
671 | if (!pwrdm) |
672 | return -EINVAL; | |
673 | ||
f327e07b RN |
674 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_pwrst) |
675 | ret = arch_pwrdm->pwrdm_read_prev_pwrst(pwrdm); | |
676 | ||
677 | return ret; | |
ad67ef68 PW |
678 | } |
679 | ||
680 | /** | |
681 | * pwrdm_set_logic_retst - set powerdomain logic power state upon retention | |
682 | * @pwrdm: struct powerdomain * to set | |
683 | * @pwrst: one of the PWRDM_POWER_* macros | |
684 | * | |
f0271d65 PW |
685 | * Set the next power state @pwrst that the logic portion of the |
686 | * powerdomain @pwrdm will enter when the powerdomain enters retention. | |
687 | * This will be either RETENTION or OFF, if supported. Returns | |
688 | * -EINVAL if the powerdomain pointer is null or the target power | |
689 | * state is not not supported, or returns 0 upon success. | |
ad67ef68 PW |
690 | */ |
691 | int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) | |
692 | { | |
12627578 | 693 | int ret = -EINVAL; |
2bc4ef71 | 694 | |
ad67ef68 PW |
695 | if (!pwrdm) |
696 | return -EINVAL; | |
697 | ||
698 | if (!(pwrdm->pwrsts_logic_ret & (1 << pwrst))) | |
699 | return -EINVAL; | |
700 | ||
7852ec05 | 701 | pr_debug("powerdomain: %s: setting next logic powerstate to %0x\n", |
ad67ef68 PW |
702 | pwrdm->name, pwrst); |
703 | ||
12627578 RN |
704 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_logic_retst) |
705 | ret = arch_pwrdm->pwrdm_set_logic_retst(pwrdm, pwrst); | |
ad67ef68 | 706 | |
12627578 | 707 | return ret; |
ad67ef68 PW |
708 | } |
709 | ||
710 | /** | |
711 | * pwrdm_set_mem_onst - set memory power state while powerdomain ON | |
712 | * @pwrdm: struct powerdomain * to set | |
713 | * @bank: memory bank number to set (0-3) | |
714 | * @pwrst: one of the PWRDM_POWER_* macros | |
715 | * | |
f0271d65 PW |
716 | * Set the next power state @pwrst that memory bank @bank of the |
717 | * powerdomain @pwrdm will enter when the powerdomain enters the ON | |
718 | * state. @bank will be a number from 0 to 3, and represents different | |
719 | * types of memory, depending on the powerdomain. Returns -EINVAL if | |
720 | * the powerdomain pointer is null or the target power state is not | |
721 | * not supported for this memory bank, -EEXIST if the target memory | |
722 | * bank does not exist or is not controllable, or returns 0 upon | |
723 | * success. | |
ad67ef68 PW |
724 | */ |
725 | int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) | |
726 | { | |
9b7fc907 | 727 | int ret = -EINVAL; |
ad67ef68 PW |
728 | |
729 | if (!pwrdm) | |
730 | return -EINVAL; | |
731 | ||
732 | if (pwrdm->banks < (bank + 1)) | |
733 | return -EEXIST; | |
734 | ||
735 | if (!(pwrdm->pwrsts_mem_on[bank] & (1 << pwrst))) | |
736 | return -EINVAL; | |
737 | ||
7852ec05 PW |
738 | pr_debug("powerdomain: %s: setting next memory powerstate for bank %0x while pwrdm-ON to %0x\n", |
739 | pwrdm->name, bank, pwrst); | |
ad67ef68 | 740 | |
9b7fc907 RN |
741 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_onst) |
742 | ret = arch_pwrdm->pwrdm_set_mem_onst(pwrdm, bank, pwrst); | |
ad67ef68 | 743 | |
9b7fc907 | 744 | return ret; |
ad67ef68 PW |
745 | } |
746 | ||
747 | /** | |
748 | * pwrdm_set_mem_retst - set memory power state while powerdomain in RET | |
749 | * @pwrdm: struct powerdomain * to set | |
750 | * @bank: memory bank number to set (0-3) | |
751 | * @pwrst: one of the PWRDM_POWER_* macros | |
752 | * | |
f0271d65 PW |
753 | * Set the next power state @pwrst that memory bank @bank of the |
754 | * powerdomain @pwrdm will enter when the powerdomain enters the | |
755 | * RETENTION state. Bank will be a number from 0 to 3, and represents | |
756 | * different types of memory, depending on the powerdomain. @pwrst | |
757 | * will be either RETENTION or OFF, if supported. Returns -EINVAL if | |
758 | * the powerdomain pointer is null or the target power state is not | |
759 | * not supported for this memory bank, -EEXIST if the target memory | |
760 | * bank does not exist or is not controllable, or returns 0 upon | |
761 | * success. | |
ad67ef68 PW |
762 | */ |
763 | int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) | |
764 | { | |
9b7fc907 | 765 | int ret = -EINVAL; |
ad67ef68 PW |
766 | |
767 | if (!pwrdm) | |
768 | return -EINVAL; | |
769 | ||
770 | if (pwrdm->banks < (bank + 1)) | |
771 | return -EEXIST; | |
772 | ||
773 | if (!(pwrdm->pwrsts_mem_ret[bank] & (1 << pwrst))) | |
774 | return -EINVAL; | |
775 | ||
7852ec05 PW |
776 | pr_debug("powerdomain: %s: setting next memory powerstate for bank %0x while pwrdm-RET to %0x\n", |
777 | pwrdm->name, bank, pwrst); | |
ad67ef68 | 778 | |
9b7fc907 RN |
779 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_retst) |
780 | ret = arch_pwrdm->pwrdm_set_mem_retst(pwrdm, bank, pwrst); | |
ad67ef68 | 781 | |
9b7fc907 | 782 | return ret; |
ad67ef68 PW |
783 | } |
784 | ||
785 | /** | |
786 | * pwrdm_read_logic_pwrst - get current powerdomain logic retention power state | |
787 | * @pwrdm: struct powerdomain * to get current logic retention power state | |
788 | * | |
f0271d65 PW |
789 | * Return the power state that the logic portion of powerdomain @pwrdm |
790 | * will enter when the powerdomain enters retention. Returns -EINVAL | |
791 | * if the powerdomain pointer is null or returns the logic retention | |
792 | * power state upon success. | |
ad67ef68 PW |
793 | */ |
794 | int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm) | |
795 | { | |
12627578 RN |
796 | int ret = -EINVAL; |
797 | ||
ad67ef68 PW |
798 | if (!pwrdm) |
799 | return -EINVAL; | |
800 | ||
12627578 RN |
801 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_logic_pwrst) |
802 | ret = arch_pwrdm->pwrdm_read_logic_pwrst(pwrdm); | |
803 | ||
804 | return ret; | |
ad67ef68 PW |
805 | } |
806 | ||
807 | /** | |
808 | * pwrdm_read_prev_logic_pwrst - get previous powerdomain logic power state | |
809 | * @pwrdm: struct powerdomain * to get previous logic power state | |
810 | * | |
f0271d65 PW |
811 | * Return the powerdomain @pwrdm's previous logic power state. Returns |
812 | * -EINVAL if the powerdomain pointer is null or returns the previous | |
813 | * logic power state upon success. | |
ad67ef68 PW |
814 | */ |
815 | int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm) | |
816 | { | |
12627578 RN |
817 | int ret = -EINVAL; |
818 | ||
ad67ef68 PW |
819 | if (!pwrdm) |
820 | return -EINVAL; | |
821 | ||
12627578 RN |
822 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_logic_pwrst) |
823 | ret = arch_pwrdm->pwrdm_read_prev_logic_pwrst(pwrdm); | |
824 | ||
825 | return ret; | |
ad67ef68 PW |
826 | } |
827 | ||
1e3d0d2b TG |
828 | /** |
829 | * pwrdm_read_logic_retst - get next powerdomain logic power state | |
830 | * @pwrdm: struct powerdomain * to get next logic power state | |
831 | * | |
832 | * Return the powerdomain pwrdm's logic power state. Returns -EINVAL | |
833 | * if the powerdomain pointer is null or returns the next logic | |
834 | * power state upon success. | |
835 | */ | |
836 | int pwrdm_read_logic_retst(struct powerdomain *pwrdm) | |
837 | { | |
12627578 RN |
838 | int ret = -EINVAL; |
839 | ||
1e3d0d2b TG |
840 | if (!pwrdm) |
841 | return -EINVAL; | |
842 | ||
12627578 RN |
843 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_logic_retst) |
844 | ret = arch_pwrdm->pwrdm_read_logic_retst(pwrdm); | |
845 | ||
846 | return ret; | |
1e3d0d2b TG |
847 | } |
848 | ||
ad67ef68 PW |
849 | /** |
850 | * pwrdm_read_mem_pwrst - get current memory bank power state | |
851 | * @pwrdm: struct powerdomain * to get current memory bank power state | |
852 | * @bank: memory bank number (0-3) | |
853 | * | |
f0271d65 PW |
854 | * Return the powerdomain @pwrdm's current memory power state for bank |
855 | * @bank. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if | |
ad67ef68 PW |
856 | * the target memory bank does not exist or is not controllable, or |
857 | * returns the current memory power state upon success. | |
858 | */ | |
859 | int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank) | |
860 | { | |
9b7fc907 | 861 | int ret = -EINVAL; |
ad67ef68 PW |
862 | |
863 | if (!pwrdm) | |
9b7fc907 | 864 | return ret; |
ad67ef68 PW |
865 | |
866 | if (pwrdm->banks < (bank + 1)) | |
9b7fc907 | 867 | return ret; |
ad67ef68 | 868 | |
3863c74b TG |
869 | if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK) |
870 | bank = 1; | |
871 | ||
9b7fc907 RN |
872 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_pwrst) |
873 | ret = arch_pwrdm->pwrdm_read_mem_pwrst(pwrdm, bank); | |
ad67ef68 | 874 | |
9b7fc907 | 875 | return ret; |
ad67ef68 PW |
876 | } |
877 | ||
878 | /** | |
879 | * pwrdm_read_prev_mem_pwrst - get previous memory bank power state | |
880 | * @pwrdm: struct powerdomain * to get previous memory bank power state | |
881 | * @bank: memory bank number (0-3) | |
882 | * | |
f0271d65 PW |
883 | * Return the powerdomain @pwrdm's previous memory power state for |
884 | * bank @bank. Returns -EINVAL if the powerdomain pointer is null, | |
885 | * -EEXIST if the target memory bank does not exist or is not | |
886 | * controllable, or returns the previous memory power state upon | |
887 | * success. | |
ad67ef68 PW |
888 | */ |
889 | int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank) | |
890 | { | |
9b7fc907 | 891 | int ret = -EINVAL; |
ad67ef68 PW |
892 | |
893 | if (!pwrdm) | |
9b7fc907 | 894 | return ret; |
ad67ef68 PW |
895 | |
896 | if (pwrdm->banks < (bank + 1)) | |
9b7fc907 | 897 | return ret; |
ad67ef68 | 898 | |
3863c74b TG |
899 | if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK) |
900 | bank = 1; | |
901 | ||
9b7fc907 RN |
902 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_mem_pwrst) |
903 | ret = arch_pwrdm->pwrdm_read_prev_mem_pwrst(pwrdm, bank); | |
ad67ef68 | 904 | |
9b7fc907 | 905 | return ret; |
ad67ef68 PW |
906 | } |
907 | ||
1e3d0d2b TG |
908 | /** |
909 | * pwrdm_read_mem_retst - get next memory bank power state | |
910 | * @pwrdm: struct powerdomain * to get mext memory bank power state | |
911 | * @bank: memory bank number (0-3) | |
912 | * | |
913 | * Return the powerdomain pwrdm's next memory power state for bank | |
914 | * x. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if | |
915 | * the target memory bank does not exist or is not controllable, or | |
916 | * returns the next memory power state upon success. | |
917 | */ | |
918 | int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank) | |
919 | { | |
9b7fc907 | 920 | int ret = -EINVAL; |
1e3d0d2b TG |
921 | |
922 | if (!pwrdm) | |
9b7fc907 | 923 | return ret; |
1e3d0d2b TG |
924 | |
925 | if (pwrdm->banks < (bank + 1)) | |
9b7fc907 | 926 | return ret; |
1e3d0d2b | 927 | |
9b7fc907 RN |
928 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_retst) |
929 | ret = arch_pwrdm->pwrdm_read_mem_retst(pwrdm, bank); | |
1e3d0d2b | 930 | |
9b7fc907 | 931 | return ret; |
1e3d0d2b TG |
932 | } |
933 | ||
ad67ef68 PW |
934 | /** |
935 | * pwrdm_clear_all_prev_pwrst - clear previous powerstate register for a pwrdm | |
936 | * @pwrdm: struct powerdomain * to clear | |
937 | * | |
f0271d65 PW |
938 | * Clear the powerdomain's previous power state register @pwrdm. |
939 | * Clears the entire register, including logic and memory bank | |
940 | * previous power states. Returns -EINVAL if the powerdomain pointer | |
941 | * is null, or returns 0 upon success. | |
ad67ef68 PW |
942 | */ |
943 | int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm) | |
944 | { | |
9b7fc907 RN |
945 | int ret = -EINVAL; |
946 | ||
ad67ef68 | 947 | if (!pwrdm) |
9b7fc907 | 948 | return ret; |
ad67ef68 PW |
949 | |
950 | /* | |
951 | * XXX should get the powerdomain's current state here; | |
952 | * warn & fail if it is not ON. | |
953 | */ | |
954 | ||
7852ec05 | 955 | pr_debug("powerdomain: %s: clearing previous power state reg\n", |
ad67ef68 PW |
956 | pwrdm->name); |
957 | ||
9b7fc907 RN |
958 | if (arch_pwrdm && arch_pwrdm->pwrdm_clear_all_prev_pwrst) |
959 | ret = arch_pwrdm->pwrdm_clear_all_prev_pwrst(pwrdm); | |
ad67ef68 | 960 | |
9b7fc907 | 961 | return ret; |
ad67ef68 PW |
962 | } |
963 | ||
0b7cbfb5 PW |
964 | /** |
965 | * pwrdm_enable_hdwr_sar - enable automatic hardware SAR for a pwrdm | |
966 | * @pwrdm: struct powerdomain * | |
967 | * | |
968 | * Enable automatic context save-and-restore upon power state change | |
f0271d65 PW |
969 | * for some devices in the powerdomain @pwrdm. Warning: this only |
970 | * affects a subset of devices in a powerdomain; check the TRM | |
971 | * closely. Returns -EINVAL if the powerdomain pointer is null or if | |
972 | * the powerdomain does not support automatic save-and-restore, or | |
973 | * returns 0 upon success. | |
0b7cbfb5 PW |
974 | */ |
975 | int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm) | |
976 | { | |
9b7fc907 RN |
977 | int ret = -EINVAL; |
978 | ||
0b7cbfb5 | 979 | if (!pwrdm) |
9b7fc907 | 980 | return ret; |
0b7cbfb5 PW |
981 | |
982 | if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR)) | |
9b7fc907 | 983 | return ret; |
0b7cbfb5 | 984 | |
7852ec05 | 985 | pr_debug("powerdomain: %s: setting SAVEANDRESTORE bit\n", pwrdm->name); |
0b7cbfb5 | 986 | |
9b7fc907 RN |
987 | if (arch_pwrdm && arch_pwrdm->pwrdm_enable_hdwr_sar) |
988 | ret = arch_pwrdm->pwrdm_enable_hdwr_sar(pwrdm); | |
0b7cbfb5 | 989 | |
9b7fc907 | 990 | return ret; |
0b7cbfb5 PW |
991 | } |
992 | ||
993 | /** | |
994 | * pwrdm_disable_hdwr_sar - disable automatic hardware SAR for a pwrdm | |
995 | * @pwrdm: struct powerdomain * | |
996 | * | |
997 | * Disable automatic context save-and-restore upon power state change | |
f0271d65 PW |
998 | * for some devices in the powerdomain @pwrdm. Warning: this only |
999 | * affects a subset of devices in a powerdomain; check the TRM | |
1000 | * closely. Returns -EINVAL if the powerdomain pointer is null or if | |
1001 | * the powerdomain does not support automatic save-and-restore, or | |
1002 | * returns 0 upon success. | |
0b7cbfb5 PW |
1003 | */ |
1004 | int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm) | |
1005 | { | |
9b7fc907 RN |
1006 | int ret = -EINVAL; |
1007 | ||
0b7cbfb5 | 1008 | if (!pwrdm) |
9b7fc907 | 1009 | return ret; |
0b7cbfb5 PW |
1010 | |
1011 | if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR)) | |
9b7fc907 | 1012 | return ret; |
0b7cbfb5 | 1013 | |
7852ec05 | 1014 | pr_debug("powerdomain: %s: clearing SAVEANDRESTORE bit\n", pwrdm->name); |
0b7cbfb5 | 1015 | |
9b7fc907 RN |
1016 | if (arch_pwrdm && arch_pwrdm->pwrdm_disable_hdwr_sar) |
1017 | ret = arch_pwrdm->pwrdm_disable_hdwr_sar(pwrdm); | |
0b7cbfb5 | 1018 | |
9b7fc907 | 1019 | return ret; |
0b7cbfb5 PW |
1020 | } |
1021 | ||
1022 | /** | |
1023 | * pwrdm_has_hdwr_sar - test whether powerdomain supports hardware SAR | |
1024 | * @pwrdm: struct powerdomain * | |
1025 | * | |
f0271d65 | 1026 | * Returns 1 if powerdomain @pwrdm supports hardware save-and-restore |
0b7cbfb5 PW |
1027 | * for some devices, or 0 if it does not. |
1028 | */ | |
1029 | bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm) | |
1030 | { | |
1031 | return (pwrdm && pwrdm->flags & PWRDM_HAS_HDWR_SAR) ? 1 : 0; | |
1032 | } | |
1033 | ||
3a090284 | 1034 | int pwrdm_state_switch_nolock(struct powerdomain *pwrdm) |
90dbc7b0 | 1035 | { |
8b8c3c78 | 1036 | int ret; |
ad67ef68 | 1037 | |
f8457c2d | 1038 | if (!pwrdm || !arch_pwrdm) |
ad67ef68 PW |
1039 | return -EINVAL; |
1040 | ||
f8457c2d | 1041 | ret = arch_pwrdm->pwrdm_wait_transition(pwrdm); |
8b8c3c78 SS |
1042 | if (!ret) |
1043 | ret = _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW); | |
ad67ef68 | 1044 | |
9b7fc907 | 1045 | return ret; |
ad67ef68 PW |
1046 | } |
1047 | ||
3a090284 | 1048 | int __deprecated pwrdm_state_switch(struct powerdomain *pwrdm) |
ba20bb12 | 1049 | { |
8b8c3c78 SS |
1050 | int ret; |
1051 | ||
3a090284 PW |
1052 | pwrdm_lock(pwrdm); |
1053 | ret = pwrdm_state_switch_nolock(pwrdm); | |
1054 | pwrdm_unlock(pwrdm); | |
8b8c3c78 SS |
1055 | |
1056 | return ret; | |
ba20bb12 PDS |
1057 | } |
1058 | ||
e0555489 | 1059 | int pwrdm_pre_transition(struct powerdomain *pwrdm) |
ba20bb12 | 1060 | { |
e0555489 KH |
1061 | if (pwrdm) |
1062 | _pwrdm_pre_transition_cb(pwrdm, NULL); | |
1063 | else | |
1064 | pwrdm_for_each(_pwrdm_pre_transition_cb, NULL); | |
1065 | ||
ba20bb12 PDS |
1066 | return 0; |
1067 | } | |
1068 | ||
e0555489 | 1069 | int pwrdm_post_transition(struct powerdomain *pwrdm) |
ba20bb12 | 1070 | { |
e0555489 KH |
1071 | if (pwrdm) |
1072 | _pwrdm_post_transition_cb(pwrdm, NULL); | |
1073 | else | |
1074 | pwrdm_for_each(_pwrdm_post_transition_cb, NULL); | |
1075 | ||
ba20bb12 PDS |
1076 | return 0; |
1077 | } | |
7f595674 | 1078 | |
c4978fba PW |
1079 | /** |
1080 | * omap_set_pwrdm_state - change a powerdomain's current power state | |
1081 | * @pwrdm: struct powerdomain * to change the power state of | |
1082 | * @pwrst: power state to change to | |
1083 | * | |
1084 | * Change the current hardware power state of the powerdomain | |
1085 | * represented by @pwrdm to the power state represented by @pwrst. | |
1086 | * Returns -EINVAL if @pwrdm is null or invalid or if the | |
1087 | * powerdomain's current power state could not be read, or returns 0 | |
1088 | * upon success or if @pwrdm does not support @pwrst or any | |
1089 | * lower-power state. XXX Should not return 0 if the @pwrdm does not | |
1090 | * support @pwrst or any lower-power state: this should be an error. | |
1091 | */ | |
1092 | int omap_set_pwrdm_state(struct powerdomain *pwrdm, u8 pwrst) | |
1093 | { | |
1094 | u8 curr_pwrst, next_pwrst, sleep_switch; | |
1095 | int ret = 0; | |
1096 | bool hwsup = false; | |
1097 | ||
1098 | if (!pwrdm || IS_ERR(pwrdm)) | |
1099 | return -EINVAL; | |
1100 | ||
1101 | while (!(pwrdm->pwrsts & (1 << pwrst))) { | |
1102 | if (pwrst == PWRDM_POWER_OFF) | |
1103 | return ret; | |
1104 | pwrst--; | |
1105 | } | |
1106 | ||
3a090284 PW |
1107 | pwrdm_lock(pwrdm); |
1108 | ||
c4978fba PW |
1109 | curr_pwrst = pwrdm_read_pwrst(pwrdm); |
1110 | next_pwrst = pwrdm_read_next_pwrst(pwrdm); | |
1111 | if (curr_pwrst == pwrst && next_pwrst == pwrst) | |
3a090284 | 1112 | goto osps_out; |
c4978fba PW |
1113 | |
1114 | sleep_switch = _pwrdm_save_clkdm_state_and_activate(pwrdm, curr_pwrst, | |
1115 | pwrst, &hwsup); | |
3a090284 PW |
1116 | if (sleep_switch == ERROR_SWITCH) { |
1117 | ret = -EINVAL; | |
1118 | goto osps_out; | |
1119 | } | |
c4978fba PW |
1120 | |
1121 | ret = pwrdm_set_next_pwrst(pwrdm, pwrst); | |
1122 | if (ret) | |
1123 | pr_err("%s: unable to set power state of powerdomain: %s\n", | |
1124 | __func__, pwrdm->name); | |
1125 | ||
1126 | _pwrdm_restore_clkdm_state(pwrdm, sleep_switch, hwsup); | |
1127 | ||
3a090284 PW |
1128 | osps_out: |
1129 | pwrdm_unlock(pwrdm); | |
1130 | ||
c4978fba PW |
1131 | return ret; |
1132 | } | |
1133 | ||
7f595674 KH |
1134 | /** |
1135 | * pwrdm_get_context_loss_count - get powerdomain's context loss count | |
1136 | * @pwrdm: struct powerdomain * to wait for | |
1137 | * | |
1138 | * Context loss count is the sum of powerdomain off-mode counter, the | |
fc013873 | 1139 | * logic off counter and the per-bank memory off counter. Returns negative |
7f595674 KH |
1140 | * (and WARNs) upon error, otherwise, returns the context loss count. |
1141 | */ | |
fc013873 | 1142 | int pwrdm_get_context_loss_count(struct powerdomain *pwrdm) |
7f595674 KH |
1143 | { |
1144 | int i, count; | |
1145 | ||
1146 | if (!pwrdm) { | |
1147 | WARN(1, "powerdomain: %s: pwrdm is null\n", __func__); | |
fc013873 | 1148 | return -ENODEV; |
7f595674 KH |
1149 | } |
1150 | ||
1151 | count = pwrdm->state_counter[PWRDM_POWER_OFF]; | |
1152 | count += pwrdm->ret_logic_off_counter; | |
1153 | ||
1154 | for (i = 0; i < pwrdm->banks; i++) | |
1155 | count += pwrdm->ret_mem_off_counter[i]; | |
1156 | ||
fc013873 TV |
1157 | /* |
1158 | * Context loss count has to be a non-negative value. Clear the sign | |
1159 | * bit to get a value range from 0 to INT_MAX. | |
1160 | */ | |
1161 | count &= INT_MAX; | |
1162 | ||
1163 | pr_debug("powerdomain: %s: context loss count = %d\n", | |
7f595674 KH |
1164 | pwrdm->name, count); |
1165 | ||
1166 | return count; | |
1167 | } | |
694606c4 PW |
1168 | |
1169 | /** | |
1170 | * pwrdm_can_ever_lose_context - can this powerdomain ever lose context? | |
1171 | * @pwrdm: struct powerdomain * | |
1172 | * | |
1173 | * Given a struct powerdomain * @pwrdm, returns 1 if the powerdomain | |
1174 | * can lose either memory or logic context or if @pwrdm is invalid, or | |
1175 | * returns 0 otherwise. This function is not concerned with how the | |
1176 | * powerdomain registers are programmed (i.e., to go off or not); it's | |
1177 | * concerned with whether it's ever possible for this powerdomain to | |
1178 | * go off while some other part of the chip is active. This function | |
1179 | * assumes that every powerdomain can go to either ON or INACTIVE. | |
1180 | */ | |
1181 | bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm) | |
1182 | { | |
1183 | int i; | |
1184 | ||
62f0f39b | 1185 | if (!pwrdm) { |
694606c4 PW |
1186 | pr_debug("powerdomain: %s: invalid powerdomain pointer\n", |
1187 | __func__); | |
1188 | return 1; | |
1189 | } | |
1190 | ||
1191 | if (pwrdm->pwrsts & PWRSTS_OFF) | |
1192 | return 1; | |
1193 | ||
1194 | if (pwrdm->pwrsts & PWRSTS_RET) { | |
1195 | if (pwrdm->pwrsts_logic_ret & PWRSTS_OFF) | |
1196 | return 1; | |
1197 | ||
1198 | for (i = 0; i < pwrdm->banks; i++) | |
1199 | if (pwrdm->pwrsts_mem_ret[i] & PWRSTS_OFF) | |
1200 | return 1; | |
1201 | } | |
1202 | ||
1203 | for (i = 0; i < pwrdm->banks; i++) | |
1204 | if (pwrdm->pwrsts_mem_on[i] & PWRSTS_OFF) | |
1205 | return 1; | |
1206 | ||
1207 | return 0; | |
1208 | } |