Commit | Line | Data |
---|---|---|
33ea3a3f | 1 | /* |
2724be03 | 2 | * Power Supply driver for a Greybus module. |
33ea3a3f | 3 | * |
ffe2e248 RMS |
4 | * Copyright 2014-2015 Google Inc. |
5 | * Copyright 2014-2015 Linaro Ltd. | |
33ea3a3f GKH |
6 | * |
7 | * Released under the GPLv2 only. | |
8 | */ | |
9 | ||
10 | #include <linux/kernel.h> | |
11 | #include <linux/module.h> | |
33ea3a3f | 12 | #include <linux/power_supply.h> |
ffe2e248 RMS |
13 | #include <linux/slab.h> |
14 | ||
33ea3a3f GKH |
15 | #include "greybus.h" |
16 | ||
ffe2e248 RMS |
17 | #define PROP_MAX 32 |
18 | ||
19 | struct gb_power_supply_prop { | |
20 | enum power_supply_property prop; | |
47becc55 | 21 | u8 gb_prop; |
6e720c27 RMS |
22 | int val; |
23 | int previous_val; | |
ffe2e248 RMS |
24 | bool is_writeable; |
25 | }; | |
26 | ||
2724be03 | 27 | struct gb_power_supply { |
ffe2e248 | 28 | u8 id; |
ff85f723 | 29 | bool registered; |
ffe2e248 RMS |
30 | struct power_supply *psy; |
31 | struct power_supply_desc desc; | |
ffe2e248 RMS |
32 | char name[64]; |
33 | struct gb_power_supplies *supplies; | |
34 | struct delayed_work work; | |
35 | char *manufacturer; | |
36 | char *model_name; | |
37 | char *serial_number; | |
38 | u8 type; | |
39 | u8 properties_count; | |
40 | u8 properties_count_str; | |
41 | unsigned long last_update; | |
b5fbe819 | 42 | u8 cache_invalid; |
ffe2e248 RMS |
43 | unsigned int update_interval; |
44 | bool changed; | |
45 | struct gb_power_supply_prop *props; | |
46 | enum power_supply_property *props_raw; | |
4e013b64 PY |
47 | bool pm_acquired; |
48 | struct mutex supply_lock; | |
ffe2e248 RMS |
49 | }; |
50 | ||
51 | struct gb_power_supplies { | |
52 | struct gb_connection *connection; | |
53 | u8 supplies_count; | |
54 | struct gb_power_supply *supply; | |
55 | struct mutex supplies_lock; | |
56 | }; | |
57 | ||
722a133a RMS |
58 | #define to_gb_power_supply(x) power_supply_get_drvdata(x) |
59 | ||
60 | /* | |
61 | * General power supply properties that could be absent from various reasons, | |
62 | * like kernel versions or vendor specific versions | |
63 | */ | |
64 | #ifndef POWER_SUPPLY_PROP_VOLTAGE_BOOT | |
65 | #define POWER_SUPPLY_PROP_VOLTAGE_BOOT -1 | |
66 | #endif | |
67 | #ifndef POWER_SUPPLY_PROP_CURRENT_BOOT | |
68 | #define POWER_SUPPLY_PROP_CURRENT_BOOT -1 | |
69 | #endif | |
70 | #ifndef POWER_SUPPLY_PROP_CALIBRATE | |
71 | #define POWER_SUPPLY_PROP_CALIBRATE -1 | |
72 | #endif | |
73 | ||
ffe2e248 RMS |
74 | /* cache time in milliseconds, if cache_time is set to 0 cache is disable */ |
75 | static unsigned int cache_time = 1000; | |
76 | /* | |
77 | * update interval initial and maximum value, between the two will | |
78 | * back-off exponential | |
79 | */ | |
80 | static unsigned int update_interval_init = 1 * HZ; | |
81 | static unsigned int update_interval_max = 30 * HZ; | |
82 | ||
83 | struct gb_power_supply_changes { | |
84 | enum power_supply_property prop; | |
85 | u32 tolerance_change; | |
c4582f9d RMS |
86 | void (*prop_changed)(struct gb_power_supply *gbpsy, |
87 | struct gb_power_supply_prop *prop); | |
ffe2e248 | 88 | }; |
2bb7eae8 | 89 | |
4e013b64 PY |
90 | static void gb_power_supply_state_change(struct gb_power_supply *gbpsy, |
91 | struct gb_power_supply_prop *prop); | |
92 | ||
ffe2e248 | 93 | static const struct gb_power_supply_changes psy_props_changes[] = { |
c4582f9d RMS |
94 | { .prop = GB_POWER_SUPPLY_PROP_STATUS, |
95 | .tolerance_change = 0, | |
4e013b64 | 96 | .prop_changed = gb_power_supply_state_change, |
ffe2e248 | 97 | }, |
c4582f9d RMS |
98 | { .prop = GB_POWER_SUPPLY_PROP_TEMP, |
99 | .tolerance_change = 500, | |
100 | .prop_changed = NULL, | |
ffe2e248 | 101 | }, |
c4582f9d RMS |
102 | { .prop = GB_POWER_SUPPLY_PROP_ONLINE, |
103 | .tolerance_change = 0, | |
104 | .prop_changed = NULL, | |
ffe2e248 | 105 | }, |
33ea3a3f | 106 | }; |
33ea3a3f | 107 | |
47becc55 RMS |
108 | static int get_psp_from_gb_prop(int gb_prop, enum power_supply_property *psp) |
109 | { | |
110 | int prop; | |
111 | ||
112 | switch (gb_prop) { | |
113 | case GB_POWER_SUPPLY_PROP_STATUS: | |
114 | prop = POWER_SUPPLY_PROP_STATUS; | |
115 | break; | |
116 | case GB_POWER_SUPPLY_PROP_CHARGE_TYPE: | |
117 | prop = POWER_SUPPLY_PROP_CHARGE_TYPE; | |
118 | break; | |
119 | case GB_POWER_SUPPLY_PROP_HEALTH: | |
120 | prop = POWER_SUPPLY_PROP_HEALTH; | |
121 | break; | |
122 | case GB_POWER_SUPPLY_PROP_PRESENT: | |
123 | prop = POWER_SUPPLY_PROP_PRESENT; | |
124 | break; | |
125 | case GB_POWER_SUPPLY_PROP_ONLINE: | |
126 | prop = POWER_SUPPLY_PROP_ONLINE; | |
127 | break; | |
128 | case GB_POWER_SUPPLY_PROP_AUTHENTIC: | |
129 | prop = POWER_SUPPLY_PROP_AUTHENTIC; | |
130 | break; | |
131 | case GB_POWER_SUPPLY_PROP_TECHNOLOGY: | |
132 | prop = POWER_SUPPLY_PROP_TECHNOLOGY; | |
133 | break; | |
134 | case GB_POWER_SUPPLY_PROP_CYCLE_COUNT: | |
135 | prop = POWER_SUPPLY_PROP_CYCLE_COUNT; | |
136 | break; | |
137 | case GB_POWER_SUPPLY_PROP_VOLTAGE_MAX: | |
138 | prop = POWER_SUPPLY_PROP_VOLTAGE_MAX; | |
139 | break; | |
140 | case GB_POWER_SUPPLY_PROP_VOLTAGE_MIN: | |
141 | prop = POWER_SUPPLY_PROP_VOLTAGE_MIN; | |
142 | break; | |
143 | case GB_POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: | |
144 | prop = POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN; | |
145 | break; | |
146 | case GB_POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: | |
147 | prop = POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN; | |
148 | break; | |
149 | case GB_POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
150 | prop = POWER_SUPPLY_PROP_VOLTAGE_NOW; | |
151 | break; | |
152 | case GB_POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
153 | prop = POWER_SUPPLY_PROP_VOLTAGE_AVG; | |
154 | break; | |
155 | case GB_POWER_SUPPLY_PROP_VOLTAGE_OCV: | |
156 | prop = POWER_SUPPLY_PROP_VOLTAGE_OCV; | |
157 | break; | |
158 | case GB_POWER_SUPPLY_PROP_VOLTAGE_BOOT: | |
159 | prop = POWER_SUPPLY_PROP_VOLTAGE_BOOT; | |
160 | break; | |
161 | case GB_POWER_SUPPLY_PROP_CURRENT_MAX: | |
162 | prop = POWER_SUPPLY_PROP_CURRENT_MAX; | |
163 | break; | |
164 | case GB_POWER_SUPPLY_PROP_CURRENT_NOW: | |
165 | prop = POWER_SUPPLY_PROP_CURRENT_NOW; | |
166 | break; | |
167 | case GB_POWER_SUPPLY_PROP_CURRENT_AVG: | |
168 | prop = POWER_SUPPLY_PROP_CURRENT_AVG; | |
169 | break; | |
170 | case GB_POWER_SUPPLY_PROP_CURRENT_BOOT: | |
171 | prop = POWER_SUPPLY_PROP_CURRENT_BOOT; | |
172 | break; | |
173 | case GB_POWER_SUPPLY_PROP_POWER_NOW: | |
174 | prop = POWER_SUPPLY_PROP_POWER_NOW; | |
175 | break; | |
176 | case GB_POWER_SUPPLY_PROP_POWER_AVG: | |
177 | prop = POWER_SUPPLY_PROP_POWER_AVG; | |
178 | break; | |
179 | case GB_POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
180 | prop = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN; | |
181 | break; | |
182 | case GB_POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN: | |
183 | prop = POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN; | |
184 | break; | |
185 | case GB_POWER_SUPPLY_PROP_CHARGE_FULL: | |
186 | prop = POWER_SUPPLY_PROP_CHARGE_FULL; | |
187 | break; | |
188 | case GB_POWER_SUPPLY_PROP_CHARGE_EMPTY: | |
189 | prop = POWER_SUPPLY_PROP_CHARGE_EMPTY; | |
190 | break; | |
191 | case GB_POWER_SUPPLY_PROP_CHARGE_NOW: | |
192 | prop = POWER_SUPPLY_PROP_CHARGE_NOW; | |
193 | break; | |
194 | case GB_POWER_SUPPLY_PROP_CHARGE_AVG: | |
195 | prop = POWER_SUPPLY_PROP_CHARGE_AVG; | |
196 | break; | |
197 | case GB_POWER_SUPPLY_PROP_CHARGE_COUNTER: | |
198 | prop = POWER_SUPPLY_PROP_CHARGE_COUNTER; | |
199 | break; | |
200 | case GB_POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: | |
201 | prop = POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT; | |
202 | break; | |
203 | case GB_POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: | |
204 | prop = POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX; | |
205 | break; | |
206 | case GB_POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: | |
207 | prop = POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE; | |
208 | break; | |
209 | case GB_POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: | |
210 | prop = POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX; | |
211 | break; | |
212 | case GB_POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: | |
213 | prop = POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT; | |
214 | break; | |
215 | case GB_POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX: | |
216 | prop = POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX; | |
217 | break; | |
218 | case GB_POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: | |
219 | prop = POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT; | |
220 | break; | |
221 | case GB_POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
222 | prop = POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN; | |
223 | break; | |
224 | case GB_POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN: | |
225 | prop = POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN; | |
226 | break; | |
227 | case GB_POWER_SUPPLY_PROP_ENERGY_FULL: | |
228 | prop = POWER_SUPPLY_PROP_ENERGY_FULL; | |
229 | break; | |
230 | case GB_POWER_SUPPLY_PROP_ENERGY_EMPTY: | |
231 | prop = POWER_SUPPLY_PROP_ENERGY_EMPTY; | |
232 | break; | |
233 | case GB_POWER_SUPPLY_PROP_ENERGY_NOW: | |
234 | prop = POWER_SUPPLY_PROP_ENERGY_NOW; | |
235 | break; | |
236 | case GB_POWER_SUPPLY_PROP_ENERGY_AVG: | |
237 | prop = POWER_SUPPLY_PROP_ENERGY_AVG; | |
238 | break; | |
239 | case GB_POWER_SUPPLY_PROP_CAPACITY: | |
240 | prop = POWER_SUPPLY_PROP_CAPACITY; | |
241 | break; | |
242 | case GB_POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: | |
243 | prop = POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN; | |
244 | break; | |
245 | case GB_POWER_SUPPLY_PROP_CAPACITY_ALERT_MAX: | |
246 | prop = POWER_SUPPLY_PROP_CAPACITY_ALERT_MAX; | |
247 | break; | |
248 | case GB_POWER_SUPPLY_PROP_CAPACITY_LEVEL: | |
249 | prop = POWER_SUPPLY_PROP_CAPACITY_LEVEL; | |
250 | break; | |
251 | case GB_POWER_SUPPLY_PROP_TEMP: | |
252 | prop = POWER_SUPPLY_PROP_TEMP; | |
253 | break; | |
254 | case GB_POWER_SUPPLY_PROP_TEMP_MAX: | |
255 | prop = POWER_SUPPLY_PROP_TEMP_MAX; | |
256 | break; | |
257 | case GB_POWER_SUPPLY_PROP_TEMP_MIN: | |
258 | prop = POWER_SUPPLY_PROP_TEMP_MIN; | |
259 | break; | |
260 | case GB_POWER_SUPPLY_PROP_TEMP_ALERT_MIN: | |
261 | prop = POWER_SUPPLY_PROP_TEMP_ALERT_MIN; | |
262 | break; | |
263 | case GB_POWER_SUPPLY_PROP_TEMP_ALERT_MAX: | |
264 | prop = POWER_SUPPLY_PROP_TEMP_ALERT_MAX; | |
265 | break; | |
266 | case GB_POWER_SUPPLY_PROP_TEMP_AMBIENT: | |
267 | prop = POWER_SUPPLY_PROP_TEMP_AMBIENT; | |
268 | break; | |
269 | case GB_POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MIN: | |
270 | prop = POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MIN; | |
271 | break; | |
272 | case GB_POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MAX: | |
273 | prop = POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MAX; | |
274 | break; | |
275 | case GB_POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: | |
276 | prop = POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW; | |
277 | break; | |
278 | case GB_POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: | |
279 | prop = POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG; | |
280 | break; | |
281 | case GB_POWER_SUPPLY_PROP_TIME_TO_FULL_NOW: | |
282 | prop = POWER_SUPPLY_PROP_TIME_TO_FULL_NOW; | |
283 | break; | |
284 | case GB_POWER_SUPPLY_PROP_TIME_TO_FULL_AVG: | |
285 | prop = POWER_SUPPLY_PROP_TIME_TO_FULL_AVG; | |
286 | break; | |
287 | case GB_POWER_SUPPLY_PROP_TYPE: | |
288 | prop = POWER_SUPPLY_PROP_TYPE; | |
289 | break; | |
290 | case GB_POWER_SUPPLY_PROP_SCOPE: | |
291 | prop = POWER_SUPPLY_PROP_SCOPE; | |
292 | break; | |
293 | case GB_POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: | |
294 | prop = POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT; | |
295 | break; | |
296 | case GB_POWER_SUPPLY_PROP_CALIBRATE: | |
297 | prop = POWER_SUPPLY_PROP_CALIBRATE; | |
298 | break; | |
299 | default: | |
300 | prop = -1; | |
301 | break; | |
302 | } | |
303 | ||
304 | if (prop < 0) | |
305 | return prop; | |
306 | ||
307 | *psp = (enum power_supply_property)prop; | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
ffe2e248 | 312 | static struct gb_connection *get_conn_from_psy(struct gb_power_supply *gbpsy) |
43789c31 | 313 | { |
ffe2e248 RMS |
314 | return gbpsy->supplies->connection; |
315 | } | |
c0855bfd | 316 | |
ffe2e248 RMS |
317 | static struct gb_power_supply_prop *get_psy_prop(struct gb_power_supply *gbpsy, |
318 | enum power_supply_property psp) | |
319 | { | |
320 | int i; | |
c0855bfd | 321 | |
ffe2e248 RMS |
322 | for (i = 0; i < gbpsy->properties_count; i++) |
323 | if (gbpsy->props[i].prop == psp) | |
324 | return &gbpsy->props[i]; | |
325 | return NULL; | |
326 | } | |
327 | ||
328 | static int is_psy_prop_writeable(struct gb_power_supply *gbpsy, | |
329 | enum power_supply_property psp) | |
330 | { | |
331 | struct gb_power_supply_prop *prop; | |
332 | ||
333 | prop = get_psy_prop(gbpsy, psp); | |
334 | if (!prop) | |
335 | return -ENOENT; | |
336 | return prop->is_writeable ? 1 : 0; | |
337 | } | |
338 | ||
339 | static int is_prop_valint(enum power_supply_property psp) | |
340 | { | |
341 | return ((psp < POWER_SUPPLY_PROP_MODEL_NAME) ? 1 : 0); | |
342 | } | |
343 | ||
344 | static void next_interval(struct gb_power_supply *gbpsy) | |
345 | { | |
346 | if (gbpsy->update_interval == update_interval_max) | |
347 | return; | |
348 | ||
349 | /* do some exponential back-off in the update interval */ | |
350 | gbpsy->update_interval *= 2; | |
351 | if (gbpsy->update_interval > update_interval_max) | |
352 | gbpsy->update_interval = update_interval_max; | |
353 | } | |
354 | ||
ffe2e248 RMS |
355 | static void __gb_power_supply_changed(struct gb_power_supply *gbpsy) |
356 | { | |
357 | power_supply_changed(gbpsy->psy); | |
358 | } | |
ffe2e248 | 359 | |
4e013b64 PY |
360 | static void gb_power_supply_state_change(struct gb_power_supply *gbpsy, |
361 | struct gb_power_supply_prop *prop) | |
362 | { | |
363 | struct gb_connection *connection = get_conn_from_psy(gbpsy); | |
364 | int ret; | |
365 | ||
366 | /* | |
367 | * Check gbpsy->pm_acquired to make sure only one pair of 'get_sync' | |
368 | * and 'put_autosuspend' runtime pm call for state property change. | |
369 | */ | |
370 | mutex_lock(&gbpsy->supply_lock); | |
371 | ||
372 | if ((prop->val == GB_POWER_SUPPLY_STATUS_CHARGING) && | |
373 | !gbpsy->pm_acquired) { | |
374 | ret = gb_pm_runtime_get_sync(connection->bundle); | |
375 | if (ret) | |
376 | dev_err(&connection->bundle->dev, | |
377 | "Fail to set wake lock for charging state\n"); | |
378 | else | |
379 | gbpsy->pm_acquired = true; | |
380 | } else { | |
381 | if (gbpsy->pm_acquired) { | |
382 | ret = gb_pm_runtime_put_autosuspend(connection->bundle); | |
383 | if (ret) | |
384 | dev_err(&connection->bundle->dev, | |
385 | "Fail to set wake unlock for none charging\n"); | |
386 | else | |
387 | gbpsy->pm_acquired = false; | |
388 | } | |
389 | } | |
390 | ||
391 | mutex_unlock(&gbpsy->supply_lock); | |
392 | } | |
393 | ||
ffe2e248 RMS |
394 | static void check_changed(struct gb_power_supply *gbpsy, |
395 | struct gb_power_supply_prop *prop) | |
396 | { | |
397 | const struct gb_power_supply_changes *psyc; | |
6e720c27 RMS |
398 | int val = prop->val; |
399 | int prev_val = prop->previous_val; | |
c4582f9d | 400 | bool changed = false; |
ffe2e248 RMS |
401 | int i; |
402 | ||
403 | for (i = 0; i < ARRAY_SIZE(psy_props_changes); i++) { | |
404 | psyc = &psy_props_changes[i]; | |
405 | if (prop->prop == psyc->prop) { | |
406 | if (!psyc->tolerance_change) | |
c4582f9d | 407 | changed = true; |
ffe2e248 RMS |
408 | else if (val < prev_val && |
409 | prev_val - val > psyc->tolerance_change) | |
c4582f9d | 410 | changed = true; |
ffe2e248 RMS |
411 | else if (val > prev_val && |
412 | val - prev_val > psyc->tolerance_change) | |
c4582f9d RMS |
413 | changed = true; |
414 | ||
415 | if (changed && psyc->prop_changed) | |
416 | psyc->prop_changed(gbpsy, prop); | |
417 | ||
418 | if (changed) | |
ffe2e248 RMS |
419 | gbpsy->changed = true; |
420 | break; | |
421 | } | |
0369a459 | 422 | } |
43789c31 GKH |
423 | } |
424 | ||
ffe2e248 | 425 | static int total_props(struct gb_power_supply *gbpsy) |
33ea3a3f | 426 | { |
ffe2e248 RMS |
427 | /* this return the intval plus the strval properties */ |
428 | return (gbpsy->properties_count + gbpsy->properties_count_str); | |
429 | } | |
c0855bfd | 430 | |
ffe2e248 RMS |
431 | static void prop_append(struct gb_power_supply *gbpsy, |
432 | enum power_supply_property prop) | |
433 | { | |
434 | enum power_supply_property *new_props_raw; | |
435 | ||
436 | gbpsy->properties_count_str++; | |
437 | new_props_raw = krealloc(gbpsy->props_raw, total_props(gbpsy) * | |
438 | sizeof(enum power_supply_property), | |
439 | GFP_KERNEL); | |
440 | if (!new_props_raw) | |
441 | return; | |
442 | gbpsy->props_raw = new_props_raw; | |
443 | gbpsy->props_raw[total_props(gbpsy) - 1] = prop; | |
444 | } | |
445 | ||
446 | static int __gb_power_supply_set_name(char *init_name, char *name, size_t len) | |
447 | { | |
448 | unsigned int i = 0; | |
449 | int ret = 0; | |
450 | struct power_supply *psy; | |
451 | ||
452 | if (!strlen(init_name)) | |
453 | init_name = "gb_power_supply"; | |
454 | strlcpy(name, init_name, len); | |
455 | ||
456 | while ((ret < len) && (psy = power_supply_get_by_name(name))) { | |
ffe2e248 | 457 | power_supply_put(psy); |
722a133a | 458 | |
ffe2e248 RMS |
459 | ret = snprintf(name, len, "%s_%u", init_name, ++i); |
460 | } | |
461 | if (ret >= len) | |
462 | return -ENOMEM; | |
463 | return i; | |
464 | } | |
465 | ||
466 | static void _gb_power_supply_append_props(struct gb_power_supply *gbpsy) | |
467 | { | |
468 | if (strlen(gbpsy->manufacturer)) | |
469 | prop_append(gbpsy, POWER_SUPPLY_PROP_MANUFACTURER); | |
470 | if (strlen(gbpsy->model_name)) | |
471 | prop_append(gbpsy, POWER_SUPPLY_PROP_MODEL_NAME); | |
472 | if (strlen(gbpsy->serial_number)) | |
473 | prop_append(gbpsy, POWER_SUPPLY_PROP_SERIAL_NUMBER); | |
474 | } | |
475 | ||
476 | static int gb_power_supply_description_get(struct gb_power_supply *gbpsy) | |
477 | { | |
478 | struct gb_connection *connection = get_conn_from_psy(gbpsy); | |
479 | struct gb_power_supply_get_description_request req; | |
480 | struct gb_power_supply_get_description_response resp; | |
481 | int ret; | |
482 | ||
483 | req.psy_id = gbpsy->id; | |
484 | ||
485 | ret = gb_operation_sync(connection, | |
486 | GB_POWER_SUPPLY_TYPE_GET_DESCRIPTION, | |
487 | &req, sizeof(req), &resp, sizeof(resp)); | |
488 | if (ret < 0) | |
489 | return ret; | |
490 | ||
491 | gbpsy->manufacturer = kstrndup(resp.manufacturer, PROP_MAX, GFP_KERNEL); | |
492 | if (!gbpsy->manufacturer) | |
493 | return -ENOMEM; | |
494 | gbpsy->model_name = kstrndup(resp.model, PROP_MAX, GFP_KERNEL); | |
495 | if (!gbpsy->model_name) | |
496 | return -ENOMEM; | |
497 | gbpsy->serial_number = kstrndup(resp.serial_number, PROP_MAX, | |
498 | GFP_KERNEL); | |
499 | if (!gbpsy->serial_number) | |
500 | return -ENOMEM; | |
501 | ||
502 | gbpsy->type = le16_to_cpu(resp.type); | |
503 | gbpsy->properties_count = resp.properties_count; | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | static int gb_power_supply_prop_descriptors_get(struct gb_power_supply *gbpsy) | |
509 | { | |
510 | struct gb_connection *connection = get_conn_from_psy(gbpsy); | |
9d15134d RMS |
511 | struct gb_power_supply_get_property_descriptors_request *req; |
512 | struct gb_power_supply_get_property_descriptors_response *resp; | |
513 | struct gb_operation *op; | |
514 | u8 props_count = gbpsy->properties_count; | |
47becc55 | 515 | enum power_supply_property psp; |
ffe2e248 | 516 | int ret; |
47becc55 | 517 | int i, r = 0; |
ffe2e248 | 518 | |
9d15134d | 519 | if (props_count == 0) |
ffe2e248 RMS |
520 | return 0; |
521 | ||
9d15134d RMS |
522 | op = gb_operation_create(connection, |
523 | GB_POWER_SUPPLY_TYPE_GET_PROP_DESCRIPTORS, | |
524 | sizeof(req), sizeof(*resp) + props_count * | |
525 | sizeof(struct gb_power_supply_props_desc), | |
526 | GFP_KERNEL); | |
527 | if (!op) | |
528 | return -ENOMEM; | |
ffe2e248 | 529 | |
9d15134d RMS |
530 | req = op->request->payload; |
531 | req->psy_id = gbpsy->id; | |
532 | ||
533 | ret = gb_operation_request_send_sync(op); | |
ffe2e248 | 534 | if (ret < 0) |
9d15134d RMS |
535 | goto out_put_operation; |
536 | ||
537 | resp = op->response->payload; | |
ffe2e248 | 538 | |
47becc55 RMS |
539 | /* validate received properties */ |
540 | for (i = 0; i < props_count; i++) { | |
541 | ret = get_psp_from_gb_prop(resp->props[i].property, &psp); | |
542 | if (ret < 0) { | |
543 | dev_warn(&connection->bundle->dev, | |
544 | "greybus property %u it is not supported by this kernel, dropped\n", | |
545 | resp->props[i].property); | |
546 | gbpsy->properties_count--; | |
547 | } | |
548 | } | |
549 | ||
ffe2e248 RMS |
550 | gbpsy->props = kcalloc(gbpsy->properties_count, sizeof(*gbpsy->props), |
551 | GFP_KERNEL); | |
9d15134d RMS |
552 | if (!gbpsy->props) { |
553 | ret = -ENOMEM; | |
554 | goto out_put_operation; | |
555 | } | |
556 | ||
557 | gbpsy->props_raw = kcalloc(gbpsy->properties_count, | |
558 | sizeof(*gbpsy->props_raw), GFP_KERNEL); | |
559 | if (!gbpsy->props_raw) { | |
560 | ret = -ENOMEM; | |
561 | goto out_put_operation; | |
562 | } | |
ffe2e248 | 563 | |
47becc55 RMS |
564 | /* Store available properties, skip the ones we do not support */ |
565 | for (i = 0; i < props_count; i++) { | |
566 | ret = get_psp_from_gb_prop(resp->props[i].property, &psp); | |
567 | if (ret < 0) { | |
568 | r++; | |
569 | continue; | |
570 | } | |
571 | gbpsy->props[i - r].prop = psp; | |
572 | gbpsy->props[i - r].gb_prop = resp->props[i].property; | |
573 | gbpsy->props_raw[i - r] = psp; | |
9d15134d | 574 | if (resp->props[i].is_writeable) |
47becc55 | 575 | gbpsy->props[i - r].is_writeable = true; |
ffe2e248 | 576 | } |
c0855bfd GKH |
577 | |
578 | /* | |
ffe2e248 RMS |
579 | * now append the properties that we already got information in the |
580 | * get_description operation. (char * ones) | |
c0855bfd | 581 | */ |
ffe2e248 RMS |
582 | _gb_power_supply_append_props(gbpsy); |
583 | ||
47becc55 | 584 | ret = 0; |
9d15134d RMS |
585 | out_put_operation: |
586 | gb_operation_put(op); | |
587 | ||
588 | return ret; | |
ffe2e248 RMS |
589 | } |
590 | ||
591 | static int __gb_power_supply_property_update(struct gb_power_supply *gbpsy, | |
592 | enum power_supply_property psp) | |
593 | { | |
594 | struct gb_connection *connection = get_conn_from_psy(gbpsy); | |
595 | struct gb_power_supply_prop *prop; | |
596 | struct gb_power_supply_get_property_request req; | |
597 | struct gb_power_supply_get_property_response resp; | |
6e720c27 | 598 | int val; |
ffe2e248 RMS |
599 | int ret; |
600 | ||
601 | prop = get_psy_prop(gbpsy, psp); | |
602 | if (!prop) | |
603 | return -EINVAL; | |
604 | req.psy_id = gbpsy->id; | |
47becc55 | 605 | req.property = prop->gb_prop; |
ffe2e248 RMS |
606 | |
607 | ret = gb_operation_sync(connection, GB_POWER_SUPPLY_TYPE_GET_PROPERTY, | |
608 | &req, sizeof(req), &resp, sizeof(resp)); | |
609 | if (ret < 0) | |
610 | return ret; | |
611 | ||
612 | val = le32_to_cpu(resp.prop_val); | |
613 | if (val == prop->val) | |
614 | return 0; | |
615 | ||
616 | prop->previous_val = prop->val; | |
617 | prop->val = val; | |
618 | ||
619 | check_changed(gbpsy, prop); | |
620 | ||
621 | return 0; | |
622 | } | |
623 | ||
624 | static int __gb_power_supply_property_get(struct gb_power_supply *gbpsy, | |
625 | enum power_supply_property psp, | |
626 | union power_supply_propval *val) | |
627 | { | |
628 | struct gb_power_supply_prop *prop; | |
629 | ||
630 | prop = get_psy_prop(gbpsy, psp); | |
631 | if (!prop) | |
632 | return -EINVAL; | |
633 | ||
634 | val->intval = prop->val; | |
635 | return 0; | |
636 | } | |
637 | ||
638 | static int __gb_power_supply_property_strval_get(struct gb_power_supply *gbpsy, | |
639 | enum power_supply_property psp, | |
640 | union power_supply_propval *val) | |
641 | { | |
642 | switch (psp) { | |
643 | case POWER_SUPPLY_PROP_MODEL_NAME: | |
f921fb13 | 644 | val->strval = gbpsy->model_name; |
0369a459 | 645 | break; |
ffe2e248 | 646 | case POWER_SUPPLY_PROP_MANUFACTURER: |
f921fb13 | 647 | val->strval = gbpsy->manufacturer; |
0369a459 | 648 | break; |
ffe2e248 | 649 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
f921fb13 | 650 | val->strval = gbpsy->serial_number; |
0369a459 | 651 | break; |
0369a459 | 652 | default: |
0369a459 GKH |
653 | break; |
654 | } | |
ffe2e248 RMS |
655 | |
656 | return 0; | |
33ea3a3f GKH |
657 | } |
658 | ||
ffe2e248 RMS |
659 | static int _gb_power_supply_property_get(struct gb_power_supply *gbpsy, |
660 | enum power_supply_property psp, | |
661 | union power_supply_propval *val) | |
43789c31 | 662 | { |
ffe2e248 RMS |
663 | struct gb_connection *connection = get_conn_from_psy(gbpsy); |
664 | int ret; | |
665 | ||
666 | /* | |
667 | * Properties of type const char *, were already fetched on | |
668 | * get_description operation and should be cached in gb | |
669 | */ | |
670 | if (is_prop_valint(psp)) | |
671 | ret = __gb_power_supply_property_get(gbpsy, psp, val); | |
672 | else | |
673 | ret = __gb_power_supply_property_strval_get(gbpsy, psp, val); | |
c0855bfd | 674 | |
ffe2e248 RMS |
675 | if (ret < 0) |
676 | dev_err(&connection->bundle->dev, "get property %u\n", psp); | |
c0855bfd | 677 | |
ffe2e248 | 678 | return 0; |
43789c31 GKH |
679 | } |
680 | ||
b5fbe819 | 681 | static int is_cache_valid(struct gb_power_supply *gbpsy) |
33ea3a3f | 682 | { |
b5fbe819 RMS |
683 | /* check if cache is good enough or it has expired */ |
684 | if (gbpsy->cache_invalid) { | |
685 | gbpsy->cache_invalid = 0; | |
686 | return 0; | |
687 | } | |
ffe2e248 | 688 | |
ffe2e248 RMS |
689 | if (gbpsy->last_update && |
690 | time_is_after_jiffies(gbpsy->last_update + | |
691 | msecs_to_jiffies(cache_time))) | |
b5fbe819 RMS |
692 | return 1; |
693 | ||
694 | return 0; | |
695 | } | |
696 | ||
697 | static int gb_power_supply_status_get(struct gb_power_supply *gbpsy) | |
698 | { | |
4e013b64 | 699 | struct gb_connection *connection = get_conn_from_psy(gbpsy); |
b5fbe819 RMS |
700 | int ret = 0; |
701 | int i; | |
702 | ||
703 | if (is_cache_valid(gbpsy)) | |
ffe2e248 RMS |
704 | return 0; |
705 | ||
4e013b64 PY |
706 | ret = gb_pm_runtime_get_sync(connection->bundle); |
707 | if (ret) | |
708 | return ret; | |
709 | ||
ffe2e248 RMS |
710 | for (i = 0; i < gbpsy->properties_count; i++) { |
711 | ret = __gb_power_supply_property_update(gbpsy, | |
712 | gbpsy->props[i].prop); | |
713 | if (ret < 0) | |
714 | break; | |
715 | } | |
c0855bfd | 716 | |
ffe2e248 RMS |
717 | if (ret == 0) |
718 | gbpsy->last_update = jiffies; | |
c0855bfd | 719 | |
4e013b64 | 720 | gb_pm_runtime_put_autosuspend(connection->bundle); |
ffe2e248 | 721 | return ret; |
33ea3a3f GKH |
722 | } |
723 | ||
ffe2e248 | 724 | static void gb_power_supply_status_update(struct gb_power_supply *gbpsy) |
33ea3a3f | 725 | { |
ffe2e248 RMS |
726 | /* check if there a change that need to be reported */ |
727 | gb_power_supply_status_get(gbpsy); | |
c0855bfd | 728 | |
ffe2e248 RMS |
729 | if (!gbpsy->changed) |
730 | return; | |
c0855bfd | 731 | |
ffe2e248 RMS |
732 | gbpsy->update_interval = update_interval_init; |
733 | __gb_power_supply_changed(gbpsy); | |
734 | gbpsy->changed = false; | |
33ea3a3f GKH |
735 | } |
736 | ||
ffe2e248 | 737 | static void gb_power_supply_work(struct work_struct *work) |
33ea3a3f | 738 | { |
ffe2e248 RMS |
739 | struct gb_power_supply *gbpsy = container_of(work, |
740 | struct gb_power_supply, | |
741 | work.work); | |
c0855bfd | 742 | |
ffe2e248 RMS |
743 | /* |
744 | * if the poll interval is not set, disable polling, this is helpful | |
745 | * specially at unregister time. | |
746 | */ | |
747 | if (!gbpsy->update_interval) | |
748 | return; | |
c0855bfd | 749 | |
ffe2e248 RMS |
750 | gb_power_supply_status_update(gbpsy); |
751 | next_interval(gbpsy); | |
752 | schedule_delayed_work(&gbpsy->work, gbpsy->update_interval); | |
33ea3a3f GKH |
753 | } |
754 | ||
33ea3a3f GKH |
755 | static int get_property(struct power_supply *b, |
756 | enum power_supply_property psp, | |
757 | union power_supply_propval *val) | |
758 | { | |
ffe2e248 | 759 | struct gb_power_supply *gbpsy = to_gb_power_supply(b); |
33ea3a3f | 760 | |
ffe2e248 | 761 | gb_power_supply_status_get(gbpsy); |
33ea3a3f | 762 | |
ffe2e248 RMS |
763 | return _gb_power_supply_property_get(gbpsy, psp, val); |
764 | } | |
33ea3a3f | 765 | |
ffe2e248 RMS |
766 | static int gb_power_supply_property_set(struct gb_power_supply *gbpsy, |
767 | enum power_supply_property psp, | |
768 | int val) | |
769 | { | |
770 | struct gb_connection *connection = get_conn_from_psy(gbpsy); | |
771 | struct gb_power_supply_prop *prop; | |
772 | struct gb_power_supply_set_property_request req; | |
773 | int ret; | |
33ea3a3f | 774 | |
4e013b64 PY |
775 | ret = gb_pm_runtime_get_sync(connection->bundle); |
776 | if (ret) | |
777 | return ret; | |
778 | ||
ffe2e248 | 779 | prop = get_psy_prop(gbpsy, psp); |
4e013b64 PY |
780 | if (!prop) { |
781 | ret = -EINVAL; | |
782 | goto out; | |
783 | } | |
784 | ||
ffe2e248 | 785 | req.psy_id = gbpsy->id; |
47becc55 | 786 | req.property = prop->gb_prop; |
6e720c27 | 787 | req.prop_val = cpu_to_le32((s32)val); |
33ea3a3f | 788 | |
ffe2e248 RMS |
789 | ret = gb_operation_sync(connection, GB_POWER_SUPPLY_TYPE_SET_PROPERTY, |
790 | &req, sizeof(req), NULL, 0); | |
791 | if (ret < 0) | |
792 | goto out; | |
33ea3a3f | 793 | |
ffe2e248 RMS |
794 | /* cache immediately the new value */ |
795 | prop->val = val; | |
33ea3a3f | 796 | |
ffe2e248 | 797 | out: |
4e013b64 | 798 | gb_pm_runtime_put_autosuspend(connection->bundle); |
ffe2e248 RMS |
799 | return ret; |
800 | } | |
33ea3a3f | 801 | |
ffe2e248 RMS |
802 | static int set_property(struct power_supply *b, |
803 | enum power_supply_property psp, | |
804 | const union power_supply_propval *val) | |
805 | { | |
806 | struct gb_power_supply *gbpsy = to_gb_power_supply(b); | |
807 | ||
808 | return gb_power_supply_property_set(gbpsy, psp, val->intval); | |
809 | } | |
810 | ||
811 | static int property_is_writeable(struct power_supply *b, | |
812 | enum power_supply_property psp) | |
813 | { | |
814 | struct gb_power_supply *gbpsy = to_gb_power_supply(b); | |
815 | ||
816 | return is_psy_prop_writeable(gbpsy, psp); | |
33ea3a3f GKH |
817 | } |
818 | ||
ffe2e248 | 819 | static int gb_power_supply_register(struct gb_power_supply *gbpsy) |
a549be51 | 820 | { |
ffe2e248 | 821 | struct gb_connection *connection = get_conn_from_psy(gbpsy); |
a549be51 | 822 | struct power_supply_config cfg = {}; |
a549be51 | 823 | |
ffe2e248 | 824 | cfg.drv_data = gbpsy; |
a549be51 | 825 | |
ffe2e248 RMS |
826 | gbpsy->desc.name = gbpsy->name; |
827 | gbpsy->desc.type = gbpsy->type; | |
828 | gbpsy->desc.properties = gbpsy->props_raw; | |
829 | gbpsy->desc.num_properties = total_props(gbpsy); | |
830 | gbpsy->desc.get_property = get_property; | |
831 | gbpsy->desc.set_property = set_property; | |
832 | gbpsy->desc.property_is_writeable = property_is_writeable; | |
a549be51 | 833 | |
ffe2e248 RMS |
834 | gbpsy->psy = power_supply_register(&connection->bundle->dev, |
835 | &gbpsy->desc, &cfg); | |
95073cc2 | 836 | return PTR_ERR_OR_ZERO(gbpsy->psy); |
a549be51 | 837 | } |
a549be51 | 838 | |
ffe2e248 RMS |
839 | static void _gb_power_supply_free(struct gb_power_supply *gbpsy) |
840 | { | |
841 | kfree(gbpsy->serial_number); | |
842 | kfree(gbpsy->model_name); | |
843 | kfree(gbpsy->manufacturer); | |
844 | kfree(gbpsy->props_raw); | |
845 | kfree(gbpsy->props); | |
ffe2e248 RMS |
846 | } |
847 | ||
848 | static void _gb_power_supply_release(struct gb_power_supply *gbpsy) | |
849 | { | |
ffe2e248 RMS |
850 | gbpsy->update_interval = 0; |
851 | ||
852 | cancel_delayed_work_sync(&gbpsy->work); | |
722a133a | 853 | |
ff85f723 RMS |
854 | if (gbpsy->registered) |
855 | power_supply_unregister(gbpsy->psy); | |
ffe2e248 RMS |
856 | |
857 | _gb_power_supply_free(gbpsy); | |
858 | } | |
859 | ||
860 | static void _gb_power_supplies_release(struct gb_power_supplies *supplies) | |
861 | { | |
862 | int i; | |
863 | ||
7ccac20d RMS |
864 | if (!supplies->supply) |
865 | return; | |
866 | ||
ffe2e248 RMS |
867 | mutex_lock(&supplies->supplies_lock); |
868 | for (i = 0; i < supplies->supplies_count; i++) | |
869 | _gb_power_supply_release(&supplies->supply[i]); | |
accad1ba | 870 | kfree(supplies->supply); |
ffe2e248 | 871 | mutex_unlock(&supplies->supplies_lock); |
23f25ba6 | 872 | kfree(supplies); |
ffe2e248 RMS |
873 | } |
874 | ||
875 | static int gb_power_supplies_get_count(struct gb_power_supplies *supplies) | |
876 | { | |
877 | struct gb_power_supply_get_supplies_response resp; | |
878 | int ret; | |
879 | ||
880 | ret = gb_operation_sync(supplies->connection, | |
881 | GB_POWER_SUPPLY_TYPE_GET_SUPPLIES, | |
882 | NULL, 0, &resp, sizeof(resp)); | |
883 | if (ret < 0) | |
884 | return ret; | |
885 | ||
886 | if (!resp.supplies_count) | |
887 | return -EINVAL; | |
888 | ||
889 | supplies->supplies_count = resp.supplies_count; | |
890 | ||
891 | return ret; | |
892 | } | |
893 | ||
894 | static int gb_power_supply_config(struct gb_power_supplies *supplies, int id) | |
895 | { | |
896 | struct gb_power_supply *gbpsy = &supplies->supply[id]; | |
897 | int ret; | |
898 | ||
899 | gbpsy->supplies = supplies; | |
900 | gbpsy->id = id; | |
901 | ||
902 | ret = gb_power_supply_description_get(gbpsy); | |
903 | if (ret < 0) | |
7e9fba8d | 904 | return ret; |
ffe2e248 | 905 | |
6ac9166d | 906 | return gb_power_supply_prop_descriptors_get(gbpsy); |
7e9fba8d VK |
907 | } |
908 | ||
909 | static int gb_power_supply_enable(struct gb_power_supply *gbpsy) | |
910 | { | |
911 | int ret; | |
ffe2e248 | 912 | |
6ac9166d RMS |
913 | /* guarantee that we have an unique name, before register */ |
914 | ret = __gb_power_supply_set_name(gbpsy->model_name, gbpsy->name, | |
915 | sizeof(gbpsy->name)); | |
916 | if (ret < 0) | |
917 | return ret; | |
918 | ||
4e013b64 PY |
919 | mutex_init(&gbpsy->supply_lock); |
920 | ||
ffe2e248 RMS |
921 | ret = gb_power_supply_register(gbpsy); |
922 | if (ret < 0) | |
7e9fba8d | 923 | return ret; |
ffe2e248 RMS |
924 | |
925 | gbpsy->update_interval = update_interval_init; | |
926 | INIT_DELAYED_WORK(&gbpsy->work, gb_power_supply_work); | |
927 | schedule_delayed_work(&gbpsy->work, 0); | |
928 | ||
7e9fba8d VK |
929 | /* everything went fine, mark it for release code to know */ |
930 | gbpsy->registered = true; | |
931 | ||
932 | return 0; | |
ffe2e248 RMS |
933 | } |
934 | ||
935 | static int gb_power_supplies_setup(struct gb_power_supplies *supplies) | |
936 | { | |
937 | struct gb_connection *connection = supplies->connection; | |
938 | int ret; | |
939 | int i; | |
940 | ||
941 | mutex_lock(&supplies->supplies_lock); | |
942 | ||
943 | ret = gb_power_supplies_get_count(supplies); | |
944 | if (ret < 0) | |
945 | goto out; | |
946 | ||
947 | supplies->supply = kzalloc(supplies->supplies_count * | |
948 | sizeof(struct gb_power_supply), | |
949 | GFP_KERNEL); | |
950 | ||
e0d91ff1 JH |
951 | if (!supplies->supply) { |
952 | ret = -ENOMEM; | |
953 | goto out; | |
954 | } | |
ffe2e248 RMS |
955 | |
956 | for (i = 0; i < supplies->supplies_count; i++) { | |
957 | ret = gb_power_supply_config(supplies, i); | |
958 | if (ret < 0) { | |
959 | dev_err(&connection->bundle->dev, | |
960 | "Fail to configure supplies devices\n"); | |
961 | goto out; | |
962 | } | |
963 | } | |
964 | out: | |
965 | mutex_unlock(&supplies->supplies_lock); | |
966 | return ret; | |
967 | } | |
968 | ||
7e9fba8d VK |
969 | static int gb_power_supplies_register(struct gb_power_supplies *supplies) |
970 | { | |
971 | struct gb_connection *connection = supplies->connection; | |
972 | int ret = 0; | |
973 | int i; | |
974 | ||
975 | mutex_lock(&supplies->supplies_lock); | |
976 | ||
977 | for (i = 0; i < supplies->supplies_count; i++) { | |
978 | ret = gb_power_supply_enable(&supplies->supply[i]); | |
979 | if (ret < 0) { | |
980 | dev_err(&connection->bundle->dev, | |
981 | "Fail to enable supplies devices\n"); | |
982 | break; | |
983 | } | |
984 | } | |
985 | ||
986 | mutex_unlock(&supplies->supplies_lock); | |
987 | return ret; | |
988 | } | |
989 | ||
68b1309b | 990 | static int gb_supplies_request_handler(struct gb_operation *op) |
ffe2e248 RMS |
991 | { |
992 | struct gb_connection *connection = op->connection; | |
0ec30632 | 993 | struct gb_power_supplies *supplies = gb_connection_get_data(connection); |
ffe2e248 RMS |
994 | struct gb_power_supply *gbpsy; |
995 | struct gb_message *request; | |
996 | struct gb_power_supply_event_request *payload; | |
997 | u8 psy_id; | |
998 | u8 event; | |
999 | int ret = 0; | |
1000 | ||
68b1309b | 1001 | if (op->type != GB_POWER_SUPPLY_TYPE_EVENT) { |
ffe2e248 | 1002 | dev_err(&connection->bundle->dev, |
68b1309b | 1003 | "Unsupported unsolicited event: %u\n", op->type); |
ffe2e248 RMS |
1004 | return -EINVAL; |
1005 | } | |
1006 | ||
1007 | request = op->request; | |
1008 | ||
1009 | if (request->payload_size < sizeof(*payload)) { | |
1010 | dev_err(&connection->bundle->dev, | |
1011 | "Wrong event size received (%zu < %zu)\n", | |
1012 | request->payload_size, sizeof(*payload)); | |
1013 | return -EINVAL; | |
1014 | } | |
1015 | ||
1016 | payload = request->payload; | |
1017 | psy_id = payload->psy_id; | |
1018 | mutex_lock(&supplies->supplies_lock); | |
adb57cff RMS |
1019 | if (psy_id >= supplies->supplies_count || |
1020 | !supplies->supply[psy_id].registered) { | |
ffe2e248 RMS |
1021 | dev_err(&connection->bundle->dev, |
1022 | "Event received for unconfigured power_supply id: %d\n", | |
1023 | psy_id); | |
1024 | ret = -EINVAL; | |
1025 | goto out_unlock; | |
1026 | } | |
1027 | ||
1028 | event = payload->event; | |
1029 | /* | |
1030 | * we will only handle events after setup is done and before release is | |
1031 | * running. For that just check update_interval. | |
1032 | */ | |
1033 | gbpsy = &supplies->supply[psy_id]; | |
5f66d62e | 1034 | if (!gbpsy->update_interval) { |
ffe2e248 RMS |
1035 | ret = -ESHUTDOWN; |
1036 | goto out_unlock; | |
1037 | } | |
1038 | ||
b5fbe819 RMS |
1039 | if (event & GB_POWER_SUPPLY_UPDATE) { |
1040 | /* | |
1041 | * we need to make sure we invalidate cache, if not no new | |
1042 | * values for the properties will be fetch and the all propose | |
1043 | * of this event is missed | |
1044 | */ | |
1045 | gbpsy->cache_invalid = 1; | |
ffe2e248 | 1046 | gb_power_supply_status_update(gbpsy); |
b5fbe819 | 1047 | } |
ffe2e248 RMS |
1048 | |
1049 | out_unlock: | |
1050 | mutex_unlock(&supplies->supplies_lock); | |
1051 | return ret; | |
1052 | } | |
1053 | ||
68b1309b VK |
1054 | static int gb_power_supply_probe(struct gb_bundle *bundle, |
1055 | const struct greybus_bundle_id *id) | |
33ea3a3f | 1056 | { |
68b1309b VK |
1057 | struct greybus_descriptor_cport *cport_desc; |
1058 | struct gb_connection *connection; | |
ffe2e248 | 1059 | struct gb_power_supplies *supplies; |
d9eafd58 | 1060 | int ret; |
33ea3a3f | 1061 | |
68b1309b VK |
1062 | if (bundle->num_cports != 1) |
1063 | return -ENODEV; | |
1064 | ||
1065 | cport_desc = &bundle->cport_desc[0]; | |
1066 | if (cport_desc->protocol_id != GREYBUS_PROTOCOL_POWER_SUPPLY) | |
1067 | return -ENODEV; | |
1068 | ||
ffe2e248 RMS |
1069 | supplies = kzalloc(sizeof(*supplies), GFP_KERNEL); |
1070 | if (!supplies) | |
33ea3a3f GKH |
1071 | return -ENOMEM; |
1072 | ||
68b1309b VK |
1073 | connection = gb_connection_create(bundle, le16_to_cpu(cport_desc->id), |
1074 | gb_supplies_request_handler); | |
1075 | if (IS_ERR(connection)) { | |
1076 | ret = PTR_ERR(connection); | |
1077 | goto out; | |
1078 | } | |
1079 | ||
ffe2e248 | 1080 | supplies->connection = connection; |
0ec30632 | 1081 | gb_connection_set_data(connection, supplies); |
2bb7eae8 | 1082 | |
ffe2e248 | 1083 | mutex_init(&supplies->supplies_lock); |
c0855bfd | 1084 | |
68b1309b VK |
1085 | greybus_set_drvdata(bundle, supplies); |
1086 | ||
1087 | /* We aren't ready to receive an incoming request yet */ | |
1088 | ret = gb_connection_enable_tx(connection); | |
1089 | if (ret) | |
1090 | goto error_connection_destroy; | |
1091 | ||
d9eafd58 RMS |
1092 | ret = gb_power_supplies_setup(supplies); |
1093 | if (ret < 0) | |
68b1309b VK |
1094 | goto error_connection_disable; |
1095 | ||
1096 | /* We are ready to receive an incoming request now, enable RX as well */ | |
1097 | ret = gb_connection_enable(connection); | |
1098 | if (ret) | |
1099 | goto error_connection_disable; | |
7e9fba8d VK |
1100 | |
1101 | ret = gb_power_supplies_register(supplies); | |
1102 | if (ret < 0) | |
68b1309b | 1103 | goto error_connection_disable; |
7e9fba8d | 1104 | |
4e013b64 | 1105 | gb_pm_runtime_put_autosuspend(bundle); |
7e9fba8d | 1106 | return 0; |
d9eafd58 | 1107 | |
68b1309b VK |
1108 | error_connection_disable: |
1109 | gb_connection_disable(connection); | |
1110 | error_connection_destroy: | |
1111 | gb_connection_destroy(connection); | |
7e9fba8d VK |
1112 | out: |
1113 | _gb_power_supplies_release(supplies); | |
d9eafd58 | 1114 | return ret; |
33ea3a3f GKH |
1115 | } |
1116 | ||
68b1309b | 1117 | static void gb_power_supply_disconnect(struct gb_bundle *bundle) |
697e55d3 | 1118 | { |
68b1309b VK |
1119 | struct gb_power_supplies *supplies = greybus_get_drvdata(bundle); |
1120 | ||
1121 | gb_connection_disable(supplies->connection); | |
1122 | gb_connection_destroy(supplies->connection); | |
697e55d3 | 1123 | |
ffe2e248 | 1124 | _gb_power_supplies_release(supplies); |
697e55d3 AE |
1125 | } |
1126 | ||
68b1309b VK |
1127 | static const struct greybus_bundle_id gb_power_supply_id_table[] = { |
1128 | { GREYBUS_DEVICE_CLASS(GREYBUS_CLASS_POWER_SUPPLY) }, | |
1129 | { } | |
19d03dec | 1130 | }; |
68b1309b | 1131 | MODULE_DEVICE_TABLE(greybus, gb_power_supply_id_table); |
19d03dec | 1132 | |
68b1309b VK |
1133 | static struct greybus_driver gb_power_supply_driver = { |
1134 | .name = "power_supply", | |
1135 | .probe = gb_power_supply_probe, | |
1136 | .disconnect = gb_power_supply_disconnect, | |
1137 | .id_table = gb_power_supply_id_table, | |
1138 | }; | |
1139 | module_greybus_driver(gb_power_supply_driver); | |
19d03dec | 1140 | |
7dd26263 | 1141 | MODULE_LICENSE("GPL v2"); |