Commit | Line | Data |
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ad67ef68 PW |
1 | /* |
2 | * OMAP powerdomain control | |
3 | * | |
4 | * Copyright (C) 2007-2008 Texas Instruments, Inc. | |
55ed9694 | 5 | * Copyright (C) 2007-2009 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> |
d198b514 | 22 | #include "prm44xx.h" |
ad67ef68 | 23 | |
ce491cf8 TL |
24 | #include <plat/cpu.h> |
25 | #include <plat/powerdomain.h> | |
26 | #include <plat/clockdomain.h> | |
55ed9694 | 27 | #include <plat/prcm.h> |
ad67ef68 | 28 | |
6199ab26 PDS |
29 | #include "pm.h" |
30 | ||
ba20bb12 PDS |
31 | enum { |
32 | PWRDM_STATE_NOW = 0, | |
33 | PWRDM_STATE_PREV, | |
34 | }; | |
35 | ||
3a759f09 | 36 | |
ad67ef68 PW |
37 | /* pwrdm_list contains all registered struct powerdomains */ |
38 | static LIST_HEAD(pwrdm_list); | |
39 | ||
3b1e8b21 RN |
40 | static struct pwrdm_ops *arch_pwrdm; |
41 | ||
ad67ef68 PW |
42 | /* Private functions */ |
43 | ||
ad67ef68 PW |
44 | static struct powerdomain *_pwrdm_lookup(const char *name) |
45 | { | |
46 | struct powerdomain *pwrdm, *temp_pwrdm; | |
47 | ||
48 | pwrdm = NULL; | |
49 | ||
50 | list_for_each_entry(temp_pwrdm, &pwrdm_list, node) { | |
51 | if (!strcmp(name, temp_pwrdm->name)) { | |
52 | pwrdm = temp_pwrdm; | |
53 | break; | |
54 | } | |
55 | } | |
56 | ||
57 | return pwrdm; | |
58 | } | |
59 | ||
e909d62a PW |
60 | /** |
61 | * _pwrdm_register - register a powerdomain | |
62 | * @pwrdm: struct powerdomain * to register | |
63 | * | |
64 | * Adds a powerdomain to the internal powerdomain list. Returns | |
65 | * -EINVAL if given a null pointer, -EEXIST if a powerdomain is | |
66 | * already registered by the provided name, or 0 upon success. | |
67 | */ | |
68 | static int _pwrdm_register(struct powerdomain *pwrdm) | |
69 | { | |
70 | int i; | |
71 | ||
72 | if (!pwrdm) | |
73 | return -EINVAL; | |
74 | ||
75 | if (!omap_chip_is(pwrdm->omap_chip)) | |
76 | return -EINVAL; | |
77 | ||
78 | if (_pwrdm_lookup(pwrdm->name)) | |
79 | return -EEXIST; | |
80 | ||
81 | list_add(&pwrdm->node, &pwrdm_list); | |
82 | ||
83 | /* Initialize the powerdomain's state counter */ | |
cf57aa7c | 84 | for (i = 0; i < PWRDM_MAX_PWRSTS; i++) |
e909d62a PW |
85 | pwrdm->state_counter[i] = 0; |
86 | ||
cde08f81 TG |
87 | pwrdm->ret_logic_off_counter = 0; |
88 | for (i = 0; i < pwrdm->banks; i++) | |
89 | pwrdm->ret_mem_off_counter[i] = 0; | |
90 | ||
e909d62a PW |
91 | pwrdm_wait_transition(pwrdm); |
92 | pwrdm->state = pwrdm_read_pwrst(pwrdm); | |
93 | pwrdm->state_counter[pwrdm->state] = 1; | |
94 | ||
95 | pr_debug("powerdomain: registered %s\n", pwrdm->name); | |
96 | ||
97 | return 0; | |
98 | } | |
99 | ||
cde08f81 TG |
100 | static void _update_logic_membank_counters(struct powerdomain *pwrdm) |
101 | { | |
102 | int i; | |
103 | u8 prev_logic_pwrst, prev_mem_pwrst; | |
104 | ||
105 | prev_logic_pwrst = pwrdm_read_prev_logic_pwrst(pwrdm); | |
106 | if ((pwrdm->pwrsts_logic_ret == PWRSTS_OFF_RET) && | |
107 | (prev_logic_pwrst == PWRDM_POWER_OFF)) | |
108 | pwrdm->ret_logic_off_counter++; | |
109 | ||
110 | for (i = 0; i < pwrdm->banks; i++) { | |
111 | prev_mem_pwrst = pwrdm_read_prev_mem_pwrst(pwrdm, i); | |
112 | ||
113 | if ((pwrdm->pwrsts_mem_ret[i] == PWRSTS_OFF_RET) && | |
114 | (prev_mem_pwrst == PWRDM_POWER_OFF)) | |
115 | pwrdm->ret_mem_off_counter[i]++; | |
116 | } | |
117 | } | |
118 | ||
ba20bb12 PDS |
119 | static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag) |
120 | { | |
121 | ||
122 | int prev; | |
123 | int state; | |
124 | ||
125 | if (pwrdm == NULL) | |
126 | return -EINVAL; | |
127 | ||
128 | state = pwrdm_read_pwrst(pwrdm); | |
129 | ||
130 | switch (flag) { | |
131 | case PWRDM_STATE_NOW: | |
132 | prev = pwrdm->state; | |
133 | break; | |
134 | case PWRDM_STATE_PREV: | |
135 | prev = pwrdm_read_prev_pwrst(pwrdm); | |
136 | if (pwrdm->state != prev) | |
137 | pwrdm->state_counter[prev]++; | |
cde08f81 TG |
138 | if (prev == PWRDM_POWER_RET) |
139 | _update_logic_membank_counters(pwrdm); | |
ba20bb12 PDS |
140 | break; |
141 | default: | |
142 | return -EINVAL; | |
143 | } | |
144 | ||
145 | if (state != prev) | |
146 | pwrdm->state_counter[state]++; | |
147 | ||
6199ab26 PDS |
148 | pm_dbg_update_time(pwrdm, prev); |
149 | ||
ba20bb12 PDS |
150 | pwrdm->state = state; |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
6199ab26 | 155 | static int _pwrdm_pre_transition_cb(struct powerdomain *pwrdm, void *unused) |
ba20bb12 PDS |
156 | { |
157 | pwrdm_clear_all_prev_pwrst(pwrdm); | |
158 | _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW); | |
159 | return 0; | |
160 | } | |
161 | ||
6199ab26 | 162 | static int _pwrdm_post_transition_cb(struct powerdomain *pwrdm, void *unused) |
ba20bb12 PDS |
163 | { |
164 | _pwrdm_state_switch(pwrdm, PWRDM_STATE_PREV); | |
165 | return 0; | |
166 | } | |
167 | ||
ad67ef68 PW |
168 | /* Public functions */ |
169 | ||
170 | /** | |
171 | * pwrdm_init - set up the powerdomain layer | |
f0271d65 | 172 | * @pwrdm_list: array of struct powerdomain pointers to register |
3b1e8b21 | 173 | * @custom_funcs: func pointers for arch specfic implementations |
ad67ef68 | 174 | * |
f0271d65 PW |
175 | * Loop through the array of powerdomains @pwrdm_list, registering all |
176 | * that are available on the current CPU. If pwrdm_list is supplied | |
177 | * and not null, all of the referenced powerdomains will be | |
178 | * registered. No return value. XXX pwrdm_list is not really a | |
179 | * "list"; it is an array. Rename appropriately. | |
ad67ef68 | 180 | */ |
3b1e8b21 | 181 | void pwrdm_init(struct powerdomain **pwrdm_list, struct pwrdm_ops *custom_funcs) |
ad67ef68 PW |
182 | { |
183 | struct powerdomain **p = NULL; | |
184 | ||
3b1e8b21 RN |
185 | if (!custom_funcs) |
186 | WARN(1, "powerdomain: No custom pwrdm functions registered\n"); | |
187 | else | |
188 | arch_pwrdm = custom_funcs; | |
189 | ||
ba20bb12 | 190 | if (pwrdm_list) { |
e909d62a PW |
191 | for (p = pwrdm_list; *p; p++) |
192 | _pwrdm_register(*p); | |
ad67ef68 | 193 | } |
ad67ef68 PW |
194 | } |
195 | ||
196 | /** | |
197 | * pwrdm_lookup - look up a powerdomain by name, return a pointer | |
198 | * @name: name of powerdomain | |
199 | * | |
f0271d65 PW |
200 | * Find a registered powerdomain by its name @name. Returns a pointer |
201 | * to the struct powerdomain if found, or NULL otherwise. | |
ad67ef68 PW |
202 | */ |
203 | struct powerdomain *pwrdm_lookup(const char *name) | |
204 | { | |
205 | struct powerdomain *pwrdm; | |
ad67ef68 PW |
206 | |
207 | if (!name) | |
208 | return NULL; | |
209 | ||
ad67ef68 | 210 | pwrdm = _pwrdm_lookup(name); |
ad67ef68 PW |
211 | |
212 | return pwrdm; | |
213 | } | |
214 | ||
215 | /** | |
e909d62a | 216 | * pwrdm_for_each - call function on each registered clockdomain |
ad67ef68 PW |
217 | * @fn: callback function * |
218 | * | |
f0271d65 PW |
219 | * Call the supplied function @fn for each registered powerdomain. |
220 | * The callback function @fn can return anything but 0 to bail out | |
221 | * early from the iterator. Returns the last return value of the | |
222 | * callback function, which should be 0 for success or anything else | |
223 | * to indicate failure; or -EINVAL if the function pointer is null. | |
ad67ef68 | 224 | */ |
e909d62a PW |
225 | int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user), |
226 | void *user) | |
ad67ef68 PW |
227 | { |
228 | struct powerdomain *temp_pwrdm; | |
ad67ef68 PW |
229 | int ret = 0; |
230 | ||
231 | if (!fn) | |
232 | return -EINVAL; | |
233 | ||
ad67ef68 | 234 | list_for_each_entry(temp_pwrdm, &pwrdm_list, node) { |
6199ab26 | 235 | ret = (*fn)(temp_pwrdm, user); |
ad67ef68 PW |
236 | if (ret) |
237 | break; | |
238 | } | |
ee894b18 AB |
239 | |
240 | return ret; | |
241 | } | |
242 | ||
8420bb13 PW |
243 | /** |
244 | * pwrdm_add_clkdm - add a clockdomain to a powerdomain | |
245 | * @pwrdm: struct powerdomain * to add the clockdomain to | |
246 | * @clkdm: struct clockdomain * to associate with a powerdomain | |
247 | * | |
f0271d65 | 248 | * Associate the clockdomain @clkdm with a powerdomain @pwrdm. This |
8420bb13 PW |
249 | * enables the use of pwrdm_for_each_clkdm(). Returns -EINVAL if |
250 | * presented with invalid pointers; -ENOMEM if memory could not be allocated; | |
251 | * or 0 upon success. | |
252 | */ | |
253 | int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm) | |
254 | { | |
8420bb13 PW |
255 | int i; |
256 | int ret = -EINVAL; | |
257 | ||
258 | if (!pwrdm || !clkdm) | |
259 | return -EINVAL; | |
260 | ||
261 | pr_debug("powerdomain: associating clockdomain %s with powerdomain " | |
262 | "%s\n", clkdm->name, pwrdm->name); | |
263 | ||
8420bb13 PW |
264 | for (i = 0; i < PWRDM_MAX_CLKDMS; i++) { |
265 | if (!pwrdm->pwrdm_clkdms[i]) | |
266 | break; | |
267 | #ifdef DEBUG | |
268 | if (pwrdm->pwrdm_clkdms[i] == clkdm) { | |
269 | ret = -EINVAL; | |
270 | goto pac_exit; | |
271 | } | |
272 | #endif | |
273 | } | |
274 | ||
275 | if (i == PWRDM_MAX_CLKDMS) { | |
276 | pr_debug("powerdomain: increase PWRDM_MAX_CLKDMS for " | |
277 | "pwrdm %s clkdm %s\n", pwrdm->name, clkdm->name); | |
278 | WARN_ON(1); | |
279 | ret = -ENOMEM; | |
280 | goto pac_exit; | |
281 | } | |
282 | ||
283 | pwrdm->pwrdm_clkdms[i] = clkdm; | |
284 | ||
285 | ret = 0; | |
286 | ||
287 | pac_exit: | |
8420bb13 PW |
288 | return ret; |
289 | } | |
290 | ||
291 | /** | |
292 | * pwrdm_del_clkdm - remove a clockdomain from a powerdomain | |
293 | * @pwrdm: struct powerdomain * to add the clockdomain to | |
294 | * @clkdm: struct clockdomain * to associate with a powerdomain | |
295 | * | |
f0271d65 PW |
296 | * Dissociate the clockdomain @clkdm from the powerdomain |
297 | * @pwrdm. Returns -EINVAL if presented with invalid pointers; -ENOENT | |
298 | * if @clkdm was not associated with the powerdomain, or 0 upon | |
299 | * success. | |
8420bb13 PW |
300 | */ |
301 | int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm) | |
302 | { | |
8420bb13 PW |
303 | int ret = -EINVAL; |
304 | int i; | |
305 | ||
306 | if (!pwrdm || !clkdm) | |
307 | return -EINVAL; | |
308 | ||
309 | pr_debug("powerdomain: dissociating clockdomain %s from powerdomain " | |
310 | "%s\n", clkdm->name, pwrdm->name); | |
311 | ||
8420bb13 PW |
312 | for (i = 0; i < PWRDM_MAX_CLKDMS; i++) |
313 | if (pwrdm->pwrdm_clkdms[i] == clkdm) | |
314 | break; | |
315 | ||
316 | if (i == PWRDM_MAX_CLKDMS) { | |
317 | pr_debug("powerdomain: clkdm %s not associated with pwrdm " | |
318 | "%s ?!\n", clkdm->name, pwrdm->name); | |
319 | ret = -ENOENT; | |
320 | goto pdc_exit; | |
321 | } | |
322 | ||
323 | pwrdm->pwrdm_clkdms[i] = NULL; | |
324 | ||
325 | ret = 0; | |
326 | ||
327 | pdc_exit: | |
8420bb13 PW |
328 | return ret; |
329 | } | |
330 | ||
331 | /** | |
332 | * pwrdm_for_each_clkdm - call function on each clkdm in a pwrdm | |
333 | * @pwrdm: struct powerdomain * to iterate over | |
334 | * @fn: callback function * | |
335 | * | |
f0271d65 PW |
336 | * Call the supplied function @fn for each clockdomain in the powerdomain |
337 | * @pwrdm. The callback function can return anything but 0 to bail | |
e909d62a PW |
338 | * out early from the iterator. Returns -EINVAL if presented with |
339 | * invalid pointers; or passes along the last return value of the | |
340 | * callback function, which should be 0 for success or anything else | |
341 | * to indicate failure. | |
8420bb13 PW |
342 | */ |
343 | int pwrdm_for_each_clkdm(struct powerdomain *pwrdm, | |
344 | int (*fn)(struct powerdomain *pwrdm, | |
345 | struct clockdomain *clkdm)) | |
346 | { | |
8420bb13 PW |
347 | int ret = 0; |
348 | int i; | |
349 | ||
350 | if (!fn) | |
351 | return -EINVAL; | |
352 | ||
8420bb13 PW |
353 | for (i = 0; i < PWRDM_MAX_CLKDMS && !ret; i++) |
354 | ret = (*fn)(pwrdm, pwrdm->pwrdm_clkdms[i]); | |
355 | ||
8420bb13 PW |
356 | return ret; |
357 | } | |
358 | ||
ad67ef68 PW |
359 | /** |
360 | * pwrdm_get_mem_bank_count - get number of memory banks in this powerdomain | |
361 | * @pwrdm: struct powerdomain * | |
362 | * | |
f0271d65 | 363 | * Return the number of controllable memory banks in powerdomain @pwrdm, |
ad67ef68 PW |
364 | * starting with 1. Returns -EINVAL if the powerdomain pointer is null. |
365 | */ | |
366 | int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm) | |
367 | { | |
368 | if (!pwrdm) | |
369 | return -EINVAL; | |
370 | ||
371 | return pwrdm->banks; | |
372 | } | |
373 | ||
374 | /** | |
375 | * pwrdm_set_next_pwrst - set next powerdomain power state | |
376 | * @pwrdm: struct powerdomain * to set | |
377 | * @pwrst: one of the PWRDM_POWER_* macros | |
378 | * | |
f0271d65 | 379 | * Set the powerdomain @pwrdm's next power state to @pwrst. The powerdomain |
ad67ef68 PW |
380 | * may not enter this state immediately if the preconditions for this state |
381 | * have not been satisfied. Returns -EINVAL if the powerdomain pointer is | |
382 | * null or if the power state is invalid for the powerdomin, or returns 0 | |
383 | * upon success. | |
384 | */ | |
385 | int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst) | |
386 | { | |
f327e07b RN |
387 | int ret = -EINVAL; |
388 | ||
ad67ef68 PW |
389 | if (!pwrdm) |
390 | return -EINVAL; | |
391 | ||
392 | if (!(pwrdm->pwrsts & (1 << pwrst))) | |
393 | return -EINVAL; | |
394 | ||
395 | pr_debug("powerdomain: setting next powerstate for %s to %0x\n", | |
396 | pwrdm->name, pwrst); | |
397 | ||
f327e07b RN |
398 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst) |
399 | ret = arch_pwrdm->pwrdm_set_next_pwrst(pwrdm, pwrst); | |
ad67ef68 | 400 | |
f327e07b | 401 | return ret; |
ad67ef68 PW |
402 | } |
403 | ||
404 | /** | |
405 | * pwrdm_read_next_pwrst - get next powerdomain power state | |
406 | * @pwrdm: struct powerdomain * to get power state | |
407 | * | |
f0271d65 | 408 | * Return the powerdomain @pwrdm's next power state. Returns -EINVAL |
ad67ef68 PW |
409 | * if the powerdomain pointer is null or returns the next power state |
410 | * upon success. | |
411 | */ | |
412 | int pwrdm_read_next_pwrst(struct powerdomain *pwrdm) | |
413 | { | |
f327e07b RN |
414 | int ret = -EINVAL; |
415 | ||
ad67ef68 PW |
416 | if (!pwrdm) |
417 | return -EINVAL; | |
418 | ||
f327e07b RN |
419 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_next_pwrst) |
420 | ret = arch_pwrdm->pwrdm_read_next_pwrst(pwrdm); | |
421 | ||
422 | return ret; | |
ad67ef68 PW |
423 | } |
424 | ||
425 | /** | |
426 | * pwrdm_read_pwrst - get current powerdomain power state | |
427 | * @pwrdm: struct powerdomain * to get power state | |
428 | * | |
f0271d65 | 429 | * Return the powerdomain @pwrdm's current power state. Returns -EINVAL |
ad67ef68 PW |
430 | * if the powerdomain pointer is null or returns the current power state |
431 | * upon success. | |
432 | */ | |
433 | int pwrdm_read_pwrst(struct powerdomain *pwrdm) | |
434 | { | |
f327e07b RN |
435 | int ret = -EINVAL; |
436 | ||
ad67ef68 PW |
437 | if (!pwrdm) |
438 | return -EINVAL; | |
439 | ||
f327e07b RN |
440 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_pwrst) |
441 | ret = arch_pwrdm->pwrdm_read_pwrst(pwrdm); | |
442 | ||
443 | return ret; | |
ad67ef68 PW |
444 | } |
445 | ||
446 | /** | |
447 | * pwrdm_read_prev_pwrst - get previous powerdomain power state | |
448 | * @pwrdm: struct powerdomain * to get previous power state | |
449 | * | |
f0271d65 | 450 | * Return the powerdomain @pwrdm's previous power state. Returns -EINVAL |
ad67ef68 PW |
451 | * if the powerdomain pointer is null or returns the previous power state |
452 | * upon success. | |
453 | */ | |
454 | int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm) | |
455 | { | |
f327e07b RN |
456 | int ret = -EINVAL; |
457 | ||
ad67ef68 PW |
458 | if (!pwrdm) |
459 | return -EINVAL; | |
460 | ||
f327e07b RN |
461 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_pwrst) |
462 | ret = arch_pwrdm->pwrdm_read_prev_pwrst(pwrdm); | |
463 | ||
464 | return ret; | |
ad67ef68 PW |
465 | } |
466 | ||
467 | /** | |
468 | * pwrdm_set_logic_retst - set powerdomain logic power state upon retention | |
469 | * @pwrdm: struct powerdomain * to set | |
470 | * @pwrst: one of the PWRDM_POWER_* macros | |
471 | * | |
f0271d65 PW |
472 | * Set the next power state @pwrst that the logic portion of the |
473 | * powerdomain @pwrdm will enter when the powerdomain enters retention. | |
474 | * This will be either RETENTION or OFF, if supported. Returns | |
475 | * -EINVAL if the powerdomain pointer is null or the target power | |
476 | * state is not not supported, or returns 0 upon success. | |
ad67ef68 PW |
477 | */ |
478 | int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) | |
479 | { | |
12627578 | 480 | int ret = -EINVAL; |
2bc4ef71 | 481 | |
ad67ef68 PW |
482 | if (!pwrdm) |
483 | return -EINVAL; | |
484 | ||
485 | if (!(pwrdm->pwrsts_logic_ret & (1 << pwrst))) | |
486 | return -EINVAL; | |
487 | ||
488 | pr_debug("powerdomain: setting next logic powerstate for %s to %0x\n", | |
489 | pwrdm->name, pwrst); | |
490 | ||
12627578 RN |
491 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_logic_retst) |
492 | ret = arch_pwrdm->pwrdm_set_logic_retst(pwrdm, pwrst); | |
ad67ef68 | 493 | |
12627578 | 494 | return ret; |
ad67ef68 PW |
495 | } |
496 | ||
497 | /** | |
498 | * pwrdm_set_mem_onst - set memory power state while powerdomain ON | |
499 | * @pwrdm: struct powerdomain * to set | |
500 | * @bank: memory bank number to set (0-3) | |
501 | * @pwrst: one of the PWRDM_POWER_* macros | |
502 | * | |
f0271d65 PW |
503 | * Set the next power state @pwrst that memory bank @bank of the |
504 | * powerdomain @pwrdm will enter when the powerdomain enters the ON | |
505 | * state. @bank will be a number from 0 to 3, and represents different | |
506 | * types of memory, depending on the powerdomain. Returns -EINVAL if | |
507 | * the powerdomain pointer is null or the target power state is not | |
508 | * not supported for this memory bank, -EEXIST if the target memory | |
509 | * bank does not exist or is not controllable, or returns 0 upon | |
510 | * success. | |
ad67ef68 PW |
511 | */ |
512 | int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) | |
513 | { | |
9b7fc907 | 514 | int ret = -EINVAL; |
ad67ef68 PW |
515 | |
516 | if (!pwrdm) | |
517 | return -EINVAL; | |
518 | ||
519 | if (pwrdm->banks < (bank + 1)) | |
520 | return -EEXIST; | |
521 | ||
522 | if (!(pwrdm->pwrsts_mem_on[bank] & (1 << pwrst))) | |
523 | return -EINVAL; | |
524 | ||
525 | pr_debug("powerdomain: setting next memory powerstate for domain %s " | |
526 | "bank %0x while pwrdm-ON to %0x\n", pwrdm->name, bank, pwrst); | |
527 | ||
9b7fc907 RN |
528 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_onst) |
529 | ret = arch_pwrdm->pwrdm_set_mem_onst(pwrdm, bank, pwrst); | |
ad67ef68 | 530 | |
9b7fc907 | 531 | return ret; |
ad67ef68 PW |
532 | } |
533 | ||
534 | /** | |
535 | * pwrdm_set_mem_retst - set memory power state while powerdomain in RET | |
536 | * @pwrdm: struct powerdomain * to set | |
537 | * @bank: memory bank number to set (0-3) | |
538 | * @pwrst: one of the PWRDM_POWER_* macros | |
539 | * | |
f0271d65 PW |
540 | * Set the next power state @pwrst that memory bank @bank of the |
541 | * powerdomain @pwrdm will enter when the powerdomain enters the | |
542 | * RETENTION state. Bank will be a number from 0 to 3, and represents | |
543 | * different types of memory, depending on the powerdomain. @pwrst | |
544 | * will be either RETENTION or OFF, if supported. Returns -EINVAL if | |
545 | * the powerdomain pointer is null or the target power state is not | |
546 | * not supported for this memory bank, -EEXIST if the target memory | |
547 | * bank does not exist or is not controllable, or returns 0 upon | |
548 | * success. | |
ad67ef68 PW |
549 | */ |
550 | int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) | |
551 | { | |
9b7fc907 | 552 | int ret = -EINVAL; |
ad67ef68 PW |
553 | |
554 | if (!pwrdm) | |
555 | return -EINVAL; | |
556 | ||
557 | if (pwrdm->banks < (bank + 1)) | |
558 | return -EEXIST; | |
559 | ||
560 | if (!(pwrdm->pwrsts_mem_ret[bank] & (1 << pwrst))) | |
561 | return -EINVAL; | |
562 | ||
563 | pr_debug("powerdomain: setting next memory powerstate for domain %s " | |
564 | "bank %0x while pwrdm-RET to %0x\n", pwrdm->name, bank, pwrst); | |
565 | ||
9b7fc907 RN |
566 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_retst) |
567 | ret = arch_pwrdm->pwrdm_set_mem_retst(pwrdm, bank, pwrst); | |
ad67ef68 | 568 | |
9b7fc907 | 569 | return ret; |
ad67ef68 PW |
570 | } |
571 | ||
572 | /** | |
573 | * pwrdm_read_logic_pwrst - get current powerdomain logic retention power state | |
574 | * @pwrdm: struct powerdomain * to get current logic retention power state | |
575 | * | |
f0271d65 PW |
576 | * Return the power state that the logic portion of powerdomain @pwrdm |
577 | * will enter when the powerdomain enters retention. Returns -EINVAL | |
578 | * if the powerdomain pointer is null or returns the logic retention | |
579 | * power state upon success. | |
ad67ef68 PW |
580 | */ |
581 | int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm) | |
582 | { | |
12627578 RN |
583 | int ret = -EINVAL; |
584 | ||
ad67ef68 PW |
585 | if (!pwrdm) |
586 | return -EINVAL; | |
587 | ||
12627578 RN |
588 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_logic_pwrst) |
589 | ret = arch_pwrdm->pwrdm_read_logic_pwrst(pwrdm); | |
590 | ||
591 | return ret; | |
ad67ef68 PW |
592 | } |
593 | ||
594 | /** | |
595 | * pwrdm_read_prev_logic_pwrst - get previous powerdomain logic power state | |
596 | * @pwrdm: struct powerdomain * to get previous logic power state | |
597 | * | |
f0271d65 PW |
598 | * Return the powerdomain @pwrdm's previous logic power state. Returns |
599 | * -EINVAL if the powerdomain pointer is null or returns the previous | |
600 | * logic power state upon success. | |
ad67ef68 PW |
601 | */ |
602 | int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm) | |
603 | { | |
12627578 RN |
604 | int ret = -EINVAL; |
605 | ||
ad67ef68 PW |
606 | if (!pwrdm) |
607 | return -EINVAL; | |
608 | ||
12627578 RN |
609 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_logic_pwrst) |
610 | ret = arch_pwrdm->pwrdm_read_prev_logic_pwrst(pwrdm); | |
611 | ||
612 | return ret; | |
ad67ef68 PW |
613 | } |
614 | ||
1e3d0d2b TG |
615 | /** |
616 | * pwrdm_read_logic_retst - get next powerdomain logic power state | |
617 | * @pwrdm: struct powerdomain * to get next logic power state | |
618 | * | |
619 | * Return the powerdomain pwrdm's logic power state. Returns -EINVAL | |
620 | * if the powerdomain pointer is null or returns the next logic | |
621 | * power state upon success. | |
622 | */ | |
623 | int pwrdm_read_logic_retst(struct powerdomain *pwrdm) | |
624 | { | |
12627578 RN |
625 | int ret = -EINVAL; |
626 | ||
1e3d0d2b TG |
627 | if (!pwrdm) |
628 | return -EINVAL; | |
629 | ||
12627578 RN |
630 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_logic_retst) |
631 | ret = arch_pwrdm->pwrdm_read_logic_retst(pwrdm); | |
632 | ||
633 | return ret; | |
1e3d0d2b TG |
634 | } |
635 | ||
ad67ef68 PW |
636 | /** |
637 | * pwrdm_read_mem_pwrst - get current memory bank power state | |
638 | * @pwrdm: struct powerdomain * to get current memory bank power state | |
639 | * @bank: memory bank number (0-3) | |
640 | * | |
f0271d65 PW |
641 | * Return the powerdomain @pwrdm's current memory power state for bank |
642 | * @bank. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if | |
ad67ef68 PW |
643 | * the target memory bank does not exist or is not controllable, or |
644 | * returns the current memory power state upon success. | |
645 | */ | |
646 | int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank) | |
647 | { | |
9b7fc907 | 648 | int ret = -EINVAL; |
ad67ef68 PW |
649 | |
650 | if (!pwrdm) | |
9b7fc907 | 651 | return ret; |
ad67ef68 PW |
652 | |
653 | if (pwrdm->banks < (bank + 1)) | |
9b7fc907 | 654 | return ret; |
ad67ef68 | 655 | |
3863c74b TG |
656 | if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK) |
657 | bank = 1; | |
658 | ||
9b7fc907 RN |
659 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_pwrst) |
660 | ret = arch_pwrdm->pwrdm_read_mem_pwrst(pwrdm, bank); | |
ad67ef68 | 661 | |
9b7fc907 | 662 | return ret; |
ad67ef68 PW |
663 | } |
664 | ||
665 | /** | |
666 | * pwrdm_read_prev_mem_pwrst - get previous memory bank power state | |
667 | * @pwrdm: struct powerdomain * to get previous memory bank power state | |
668 | * @bank: memory bank number (0-3) | |
669 | * | |
f0271d65 PW |
670 | * Return the powerdomain @pwrdm's previous memory power state for |
671 | * bank @bank. Returns -EINVAL if the powerdomain pointer is null, | |
672 | * -EEXIST if the target memory bank does not exist or is not | |
673 | * controllable, or returns the previous memory power state upon | |
674 | * success. | |
ad67ef68 PW |
675 | */ |
676 | int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank) | |
677 | { | |
9b7fc907 | 678 | int ret = -EINVAL; |
ad67ef68 PW |
679 | |
680 | if (!pwrdm) | |
9b7fc907 | 681 | return ret; |
ad67ef68 PW |
682 | |
683 | if (pwrdm->banks < (bank + 1)) | |
9b7fc907 | 684 | return ret; |
ad67ef68 | 685 | |
3863c74b TG |
686 | if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK) |
687 | bank = 1; | |
688 | ||
9b7fc907 RN |
689 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_mem_pwrst) |
690 | ret = arch_pwrdm->pwrdm_read_prev_mem_pwrst(pwrdm, bank); | |
ad67ef68 | 691 | |
9b7fc907 | 692 | return ret; |
ad67ef68 PW |
693 | } |
694 | ||
1e3d0d2b TG |
695 | /** |
696 | * pwrdm_read_mem_retst - get next memory bank power state | |
697 | * @pwrdm: struct powerdomain * to get mext memory bank power state | |
698 | * @bank: memory bank number (0-3) | |
699 | * | |
700 | * Return the powerdomain pwrdm's next memory power state for bank | |
701 | * x. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if | |
702 | * the target memory bank does not exist or is not controllable, or | |
703 | * returns the next memory power state upon success. | |
704 | */ | |
705 | int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank) | |
706 | { | |
9b7fc907 | 707 | int ret = -EINVAL; |
1e3d0d2b TG |
708 | |
709 | if (!pwrdm) | |
9b7fc907 | 710 | return ret; |
1e3d0d2b TG |
711 | |
712 | if (pwrdm->banks < (bank + 1)) | |
9b7fc907 | 713 | return ret; |
1e3d0d2b | 714 | |
9b7fc907 RN |
715 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_retst) |
716 | ret = arch_pwrdm->pwrdm_read_mem_retst(pwrdm, bank); | |
1e3d0d2b | 717 | |
9b7fc907 | 718 | return ret; |
1e3d0d2b TG |
719 | } |
720 | ||
ad67ef68 PW |
721 | /** |
722 | * pwrdm_clear_all_prev_pwrst - clear previous powerstate register for a pwrdm | |
723 | * @pwrdm: struct powerdomain * to clear | |
724 | * | |
f0271d65 PW |
725 | * Clear the powerdomain's previous power state register @pwrdm. |
726 | * Clears the entire register, including logic and memory bank | |
727 | * previous power states. Returns -EINVAL if the powerdomain pointer | |
728 | * is null, or returns 0 upon success. | |
ad67ef68 PW |
729 | */ |
730 | int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm) | |
731 | { | |
9b7fc907 RN |
732 | int ret = -EINVAL; |
733 | ||
ad67ef68 | 734 | if (!pwrdm) |
9b7fc907 | 735 | return ret; |
ad67ef68 PW |
736 | |
737 | /* | |
738 | * XXX should get the powerdomain's current state here; | |
739 | * warn & fail if it is not ON. | |
740 | */ | |
741 | ||
742 | pr_debug("powerdomain: clearing previous power state reg for %s\n", | |
743 | pwrdm->name); | |
744 | ||
9b7fc907 RN |
745 | if (arch_pwrdm && arch_pwrdm->pwrdm_clear_all_prev_pwrst) |
746 | ret = arch_pwrdm->pwrdm_clear_all_prev_pwrst(pwrdm); | |
ad67ef68 | 747 | |
9b7fc907 | 748 | return ret; |
ad67ef68 PW |
749 | } |
750 | ||
0b7cbfb5 PW |
751 | /** |
752 | * pwrdm_enable_hdwr_sar - enable automatic hardware SAR for a pwrdm | |
753 | * @pwrdm: struct powerdomain * | |
754 | * | |
755 | * Enable automatic context save-and-restore upon power state change | |
f0271d65 PW |
756 | * for some devices in the powerdomain @pwrdm. Warning: this only |
757 | * affects a subset of devices in a powerdomain; check the TRM | |
758 | * closely. Returns -EINVAL if the powerdomain pointer is null or if | |
759 | * the powerdomain does not support automatic save-and-restore, or | |
760 | * returns 0 upon success. | |
0b7cbfb5 PW |
761 | */ |
762 | int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm) | |
763 | { | |
9b7fc907 RN |
764 | int ret = -EINVAL; |
765 | ||
0b7cbfb5 | 766 | if (!pwrdm) |
9b7fc907 | 767 | return ret; |
0b7cbfb5 PW |
768 | |
769 | if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR)) | |
9b7fc907 | 770 | return ret; |
0b7cbfb5 PW |
771 | |
772 | pr_debug("powerdomain: %s: setting SAVEANDRESTORE bit\n", | |
773 | pwrdm->name); | |
774 | ||
9b7fc907 RN |
775 | if (arch_pwrdm && arch_pwrdm->pwrdm_enable_hdwr_sar) |
776 | ret = arch_pwrdm->pwrdm_enable_hdwr_sar(pwrdm); | |
0b7cbfb5 | 777 | |
9b7fc907 | 778 | return ret; |
0b7cbfb5 PW |
779 | } |
780 | ||
781 | /** | |
782 | * pwrdm_disable_hdwr_sar - disable automatic hardware SAR for a pwrdm | |
783 | * @pwrdm: struct powerdomain * | |
784 | * | |
785 | * Disable automatic context save-and-restore upon power state change | |
f0271d65 PW |
786 | * for some devices in the powerdomain @pwrdm. Warning: this only |
787 | * affects a subset of devices in a powerdomain; check the TRM | |
788 | * closely. Returns -EINVAL if the powerdomain pointer is null or if | |
789 | * the powerdomain does not support automatic save-and-restore, or | |
790 | * returns 0 upon success. | |
0b7cbfb5 PW |
791 | */ |
792 | int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm) | |
793 | { | |
9b7fc907 RN |
794 | int ret = -EINVAL; |
795 | ||
0b7cbfb5 | 796 | if (!pwrdm) |
9b7fc907 | 797 | return ret; |
0b7cbfb5 PW |
798 | |
799 | if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR)) | |
9b7fc907 | 800 | return ret; |
0b7cbfb5 PW |
801 | |
802 | pr_debug("powerdomain: %s: clearing SAVEANDRESTORE bit\n", | |
803 | pwrdm->name); | |
804 | ||
9b7fc907 RN |
805 | if (arch_pwrdm && arch_pwrdm->pwrdm_disable_hdwr_sar) |
806 | ret = arch_pwrdm->pwrdm_disable_hdwr_sar(pwrdm); | |
0b7cbfb5 | 807 | |
9b7fc907 | 808 | return ret; |
0b7cbfb5 PW |
809 | } |
810 | ||
811 | /** | |
812 | * pwrdm_has_hdwr_sar - test whether powerdomain supports hardware SAR | |
813 | * @pwrdm: struct powerdomain * | |
814 | * | |
f0271d65 | 815 | * Returns 1 if powerdomain @pwrdm supports hardware save-and-restore |
0b7cbfb5 PW |
816 | * for some devices, or 0 if it does not. |
817 | */ | |
818 | bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm) | |
819 | { | |
820 | return (pwrdm && pwrdm->flags & PWRDM_HAS_HDWR_SAR) ? 1 : 0; | |
821 | } | |
822 | ||
90dbc7b0 RN |
823 | /** |
824 | * pwrdm_set_lowpwrstchange - Request a low power state change | |
825 | * @pwrdm: struct powerdomain * | |
826 | * | |
827 | * Allows a powerdomain to transtion to a lower power sleep state | |
828 | * from an existing sleep state without waking up the powerdomain. | |
829 | * Returns -EINVAL if the powerdomain pointer is null or if the | |
830 | * powerdomain does not support LOWPOWERSTATECHANGE, or returns 0 | |
831 | * upon success. | |
832 | */ | |
833 | int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm) | |
834 | { | |
9b7fc907 RN |
835 | int ret = -EINVAL; |
836 | ||
90dbc7b0 RN |
837 | if (!pwrdm) |
838 | return -EINVAL; | |
839 | ||
840 | if (!(pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE)) | |
841 | return -EINVAL; | |
842 | ||
843 | pr_debug("powerdomain: %s: setting LOWPOWERSTATECHANGE bit\n", | |
844 | pwrdm->name); | |
845 | ||
9b7fc907 RN |
846 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_lowpwrstchange) |
847 | ret = arch_pwrdm->pwrdm_set_lowpwrstchange(pwrdm); | |
90dbc7b0 | 848 | |
9b7fc907 | 849 | return ret; |
90dbc7b0 RN |
850 | } |
851 | ||
ad67ef68 PW |
852 | /** |
853 | * pwrdm_wait_transition - wait for powerdomain power transition to finish | |
854 | * @pwrdm: struct powerdomain * to wait for | |
855 | * | |
f0271d65 | 856 | * If the powerdomain @pwrdm is in the process of a state transition, |
ad67ef68 PW |
857 | * spin until it completes the power transition, or until an iteration |
858 | * bailout value is reached. Returns -EINVAL if the powerdomain | |
859 | * pointer is null, -EAGAIN if the bailout value was reached, or | |
860 | * returns 0 upon success. | |
861 | */ | |
862 | int pwrdm_wait_transition(struct powerdomain *pwrdm) | |
863 | { | |
9b7fc907 | 864 | int ret = -EINVAL; |
ad67ef68 PW |
865 | |
866 | if (!pwrdm) | |
867 | return -EINVAL; | |
868 | ||
9b7fc907 RN |
869 | if (arch_pwrdm && arch_pwrdm->pwrdm_wait_transition) |
870 | ret = arch_pwrdm->pwrdm_wait_transition(pwrdm); | |
ad67ef68 | 871 | |
9b7fc907 | 872 | return ret; |
ad67ef68 PW |
873 | } |
874 | ||
ba20bb12 PDS |
875 | int pwrdm_state_switch(struct powerdomain *pwrdm) |
876 | { | |
877 | return _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW); | |
878 | } | |
879 | ||
880 | int pwrdm_clkdm_state_switch(struct clockdomain *clkdm) | |
881 | { | |
882 | if (clkdm != NULL && clkdm->pwrdm.ptr != NULL) { | |
883 | pwrdm_wait_transition(clkdm->pwrdm.ptr); | |
884 | return pwrdm_state_switch(clkdm->pwrdm.ptr); | |
885 | } | |
886 | ||
887 | return -EINVAL; | |
888 | } | |
ba20bb12 PDS |
889 | |
890 | int pwrdm_pre_transition(void) | |
891 | { | |
6199ab26 | 892 | pwrdm_for_each(_pwrdm_pre_transition_cb, NULL); |
ba20bb12 PDS |
893 | return 0; |
894 | } | |
895 | ||
896 | int pwrdm_post_transition(void) | |
897 | { | |
6199ab26 | 898 | pwrdm_for_each(_pwrdm_post_transition_cb, NULL); |
ba20bb12 PDS |
899 | return 0; |
900 | } |