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1668f811 AM |
1 | /* |
2 | * Copyright (C) ST-Ericsson SA 2012 | |
3 | * | |
4 | * Charging algorithm driver for abx500 variants | |
5 | * | |
6 | * License Terms: GNU General Public License v2 | |
7 | * Authors: | |
8 | * Johan Palsson <johan.palsson@stericsson.com> | |
9 | * Karl Komierowski <karl.komierowski@stericsson.com> | |
10 | * Arun R Murthy <arun.murthy@stericsson.com> | |
11 | */ | |
12 | ||
13 | #include <linux/init.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/device.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/power_supply.h> | |
21 | #include <linux/completion.h> | |
22 | #include <linux/workqueue.h> | |
23 | #include <linux/kobject.h> | |
a12810ab R |
24 | #include <linux/of.h> |
25 | #include <linux/mfd/core.h> | |
1668f811 AM |
26 | #include <linux/mfd/abx500.h> |
27 | #include <linux/mfd/abx500/ux500_chargalg.h> | |
28 | #include <linux/mfd/abx500/ab8500-bm.h> | |
8891716e | 29 | #include <linux/notifier.h> |
1668f811 AM |
30 | |
31 | /* Watchdog kick interval */ | |
32 | #define CHG_WD_INTERVAL (6 * HZ) | |
33 | ||
34 | /* End-of-charge criteria counter */ | |
35 | #define EOC_COND_CNT 10 | |
36 | ||
1668f811 AM |
37 | #define to_abx500_chargalg_device_info(x) container_of((x), \ |
38 | struct abx500_chargalg, chargalg_psy); | |
39 | ||
40 | enum abx500_chargers { | |
41 | NO_CHG, | |
42 | AC_CHG, | |
43 | USB_CHG, | |
44 | }; | |
45 | ||
46 | struct abx500_chargalg_charger_info { | |
47 | enum abx500_chargers conn_chg; | |
48 | enum abx500_chargers prev_conn_chg; | |
49 | enum abx500_chargers online_chg; | |
50 | enum abx500_chargers prev_online_chg; | |
51 | enum abx500_chargers charger_type; | |
52 | bool usb_chg_ok; | |
53 | bool ac_chg_ok; | |
54 | int usb_volt; | |
55 | int usb_curr; | |
56 | int ac_volt; | |
57 | int ac_curr; | |
58 | int usb_vset; | |
59 | int usb_iset; | |
60 | int ac_vset; | |
61 | int ac_iset; | |
62 | }; | |
63 | ||
64 | struct abx500_chargalg_suspension_status { | |
65 | bool suspended_change; | |
66 | bool ac_suspended; | |
67 | bool usb_suspended; | |
68 | }; | |
69 | ||
70 | struct abx500_chargalg_battery_data { | |
71 | int temp; | |
72 | int volt; | |
73 | int avg_curr; | |
74 | int inst_curr; | |
75 | int percent; | |
76 | }; | |
77 | ||
78 | enum abx500_chargalg_states { | |
79 | STATE_HANDHELD_INIT, | |
80 | STATE_HANDHELD, | |
81 | STATE_CHG_NOT_OK_INIT, | |
82 | STATE_CHG_NOT_OK, | |
83 | STATE_HW_TEMP_PROTECT_INIT, | |
84 | STATE_HW_TEMP_PROTECT, | |
85 | STATE_NORMAL_INIT, | |
86 | STATE_NORMAL, | |
87 | STATE_WAIT_FOR_RECHARGE_INIT, | |
88 | STATE_WAIT_FOR_RECHARGE, | |
89 | STATE_MAINTENANCE_A_INIT, | |
90 | STATE_MAINTENANCE_A, | |
91 | STATE_MAINTENANCE_B_INIT, | |
92 | STATE_MAINTENANCE_B, | |
93 | STATE_TEMP_UNDEROVER_INIT, | |
94 | STATE_TEMP_UNDEROVER, | |
95 | STATE_TEMP_LOWHIGH_INIT, | |
96 | STATE_TEMP_LOWHIGH, | |
97 | STATE_SUSPENDED_INIT, | |
98 | STATE_SUSPENDED, | |
99 | STATE_OVV_PROTECT_INIT, | |
100 | STATE_OVV_PROTECT, | |
101 | STATE_SAFETY_TIMER_EXPIRED_INIT, | |
102 | STATE_SAFETY_TIMER_EXPIRED, | |
103 | STATE_BATT_REMOVED_INIT, | |
104 | STATE_BATT_REMOVED, | |
105 | STATE_WD_EXPIRED_INIT, | |
106 | STATE_WD_EXPIRED, | |
107 | }; | |
108 | ||
109 | static const char *states[] = { | |
110 | "HANDHELD_INIT", | |
111 | "HANDHELD", | |
112 | "CHG_NOT_OK_INIT", | |
113 | "CHG_NOT_OK", | |
114 | "HW_TEMP_PROTECT_INIT", | |
115 | "HW_TEMP_PROTECT", | |
116 | "NORMAL_INIT", | |
117 | "NORMAL", | |
118 | "WAIT_FOR_RECHARGE_INIT", | |
119 | "WAIT_FOR_RECHARGE", | |
120 | "MAINTENANCE_A_INIT", | |
121 | "MAINTENANCE_A", | |
122 | "MAINTENANCE_B_INIT", | |
123 | "MAINTENANCE_B", | |
124 | "TEMP_UNDEROVER_INIT", | |
125 | "TEMP_UNDEROVER", | |
126 | "TEMP_LOWHIGH_INIT", | |
127 | "TEMP_LOWHIGH", | |
128 | "SUSPENDED_INIT", | |
129 | "SUSPENDED", | |
130 | "OVV_PROTECT_INIT", | |
131 | "OVV_PROTECT", | |
132 | "SAFETY_TIMER_EXPIRED_INIT", | |
133 | "SAFETY_TIMER_EXPIRED", | |
134 | "BATT_REMOVED_INIT", | |
135 | "BATT_REMOVED", | |
136 | "WD_EXPIRED_INIT", | |
137 | "WD_EXPIRED", | |
138 | }; | |
139 | ||
140 | struct abx500_chargalg_events { | |
141 | bool batt_unknown; | |
142 | bool mainextchnotok; | |
143 | bool batt_ovv; | |
144 | bool batt_rem; | |
145 | bool btemp_underover; | |
146 | bool btemp_lowhigh; | |
147 | bool main_thermal_prot; | |
148 | bool usb_thermal_prot; | |
149 | bool main_ovv; | |
150 | bool vbus_ovv; | |
151 | bool usbchargernotok; | |
152 | bool safety_timer_expired; | |
153 | bool maintenance_timer_expired; | |
154 | bool ac_wd_expired; | |
155 | bool usb_wd_expired; | |
156 | bool ac_cv_active; | |
157 | bool usb_cv_active; | |
158 | bool vbus_collapsed; | |
159 | }; | |
160 | ||
161 | /** | |
162 | * struct abx500_charge_curr_maximization - Charger maximization parameters | |
163 | * @original_iset: the non optimized/maximised charger current | |
164 | * @current_iset: the charging current used at this moment | |
165 | * @test_delta_i: the delta between the current we want to charge and the | |
166 | current that is really going into the battery | |
167 | * @condition_cnt: number of iterations needed before a new charger current | |
168 | is set | |
169 | * @max_current: maximum charger current | |
170 | * @wait_cnt: to avoid too fast current step down in case of charger | |
171 | * voltage collapse, we insert this delay between step | |
172 | * down | |
173 | * @level: tells in how many steps the charging current has been | |
174 | increased | |
175 | */ | |
176 | struct abx500_charge_curr_maximization { | |
177 | int original_iset; | |
178 | int current_iset; | |
179 | int test_delta_i; | |
180 | int condition_cnt; | |
181 | int max_current; | |
182 | int wait_cnt; | |
183 | u8 level; | |
184 | }; | |
185 | ||
186 | enum maxim_ret { | |
187 | MAXIM_RET_NOACTION, | |
188 | MAXIM_RET_CHANGE, | |
189 | MAXIM_RET_IBAT_TOO_HIGH, | |
190 | }; | |
191 | ||
192 | /** | |
193 | * struct abx500_chargalg - abx500 Charging algorithm device information | |
194 | * @dev: pointer to the structure device | |
195 | * @charge_status: battery operating status | |
196 | * @eoc_cnt: counter used to determine end-of_charge | |
1668f811 AM |
197 | * @maintenance_chg: indicate if maintenance charge is active |
198 | * @t_hyst_norm temperature hysteresis when the temperature has been | |
199 | * over or under normal limits | |
200 | * @t_hyst_lowhigh temperature hysteresis when the temperature has been | |
201 | * over or under the high or low limits | |
202 | * @charge_state: current state of the charging algorithm | |
203 | * @ccm charging current maximization parameters | |
204 | * @chg_info: information about connected charger types | |
205 | * @batt_data: data of the battery | |
206 | * @susp_status: current charger suspension status | |
b0284de0 | 207 | * @bm: Platform specific battery management information |
330b7ebf | 208 | * @parent: pointer to the struct abx500 |
1668f811 AM |
209 | * @chargalg_psy: structure that holds the battery properties exposed by |
210 | * the charging algorithm | |
211 | * @events: structure for information about events triggered | |
212 | * @chargalg_wq: work queue for running the charging algorithm | |
213 | * @chargalg_periodic_work: work to run the charging algorithm periodically | |
214 | * @chargalg_wd_work: work to kick the charger watchdog periodically | |
215 | * @chargalg_work: work to run the charging algorithm instantly | |
216 | * @safety_timer: charging safety timer | |
217 | * @maintenance_timer: maintenance charging timer | |
218 | * @chargalg_kobject: structure of type kobject | |
219 | */ | |
220 | struct abx500_chargalg { | |
221 | struct device *dev; | |
222 | int charge_status; | |
223 | int eoc_cnt; | |
1668f811 AM |
224 | bool maintenance_chg; |
225 | int t_hyst_norm; | |
226 | int t_hyst_lowhigh; | |
227 | enum abx500_chargalg_states charge_state; | |
228 | struct abx500_charge_curr_maximization ccm; | |
229 | struct abx500_chargalg_charger_info chg_info; | |
230 | struct abx500_chargalg_battery_data batt_data; | |
231 | struct abx500_chargalg_suspension_status susp_status; | |
330b7ebf | 232 | struct ab8500 *parent; |
b0284de0 | 233 | struct abx500_bm_data *bm; |
1668f811 AM |
234 | struct power_supply chargalg_psy; |
235 | struct ux500_charger *ac_chg; | |
236 | struct ux500_charger *usb_chg; | |
237 | struct abx500_chargalg_events events; | |
238 | struct workqueue_struct *chargalg_wq; | |
239 | struct delayed_work chargalg_periodic_work; | |
240 | struct delayed_work chargalg_wd_work; | |
241 | struct work_struct chargalg_work; | |
242 | struct timer_list safety_timer; | |
243 | struct timer_list maintenance_timer; | |
244 | struct kobject chargalg_kobject; | |
245 | }; | |
246 | ||
8891716e LJ |
247 | /*External charger prepare notifier*/ |
248 | BLOCKING_NOTIFIER_HEAD(charger_notifier_list); | |
249 | ||
1668f811 AM |
250 | /* Main battery properties */ |
251 | static enum power_supply_property abx500_chargalg_props[] = { | |
252 | POWER_SUPPLY_PROP_STATUS, | |
253 | POWER_SUPPLY_PROP_HEALTH, | |
254 | }; | |
255 | ||
256 | /** | |
257 | * abx500_chargalg_safety_timer_expired() - Expiration of the safety timer | |
258 | * @data: pointer to the abx500_chargalg structure | |
259 | * | |
260 | * This function gets called when the safety timer for the charger | |
261 | * expires | |
262 | */ | |
263 | static void abx500_chargalg_safety_timer_expired(unsigned long data) | |
264 | { | |
265 | struct abx500_chargalg *di = (struct abx500_chargalg *) data; | |
266 | dev_err(di->dev, "Safety timer expired\n"); | |
267 | di->events.safety_timer_expired = true; | |
268 | ||
269 | /* Trigger execution of the algorithm instantly */ | |
270 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
271 | } | |
272 | ||
273 | /** | |
274 | * abx500_chargalg_maintenance_timer_expired() - Expiration of | |
275 | * the maintenance timer | |
276 | * @i: pointer to the abx500_chargalg structure | |
277 | * | |
278 | * This function gets called when the maintenence timer | |
279 | * expires | |
280 | */ | |
281 | static void abx500_chargalg_maintenance_timer_expired(unsigned long data) | |
282 | { | |
283 | ||
284 | struct abx500_chargalg *di = (struct abx500_chargalg *) data; | |
285 | dev_dbg(di->dev, "Maintenance timer expired\n"); | |
286 | di->events.maintenance_timer_expired = true; | |
287 | ||
288 | /* Trigger execution of the algorithm instantly */ | |
289 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
290 | } | |
291 | ||
292 | /** | |
293 | * abx500_chargalg_state_to() - Change charge state | |
294 | * @di: pointer to the abx500_chargalg structure | |
295 | * | |
296 | * This function gets called when a charge state change should occur | |
297 | */ | |
298 | static void abx500_chargalg_state_to(struct abx500_chargalg *di, | |
299 | enum abx500_chargalg_states state) | |
300 | { | |
301 | dev_dbg(di->dev, | |
302 | "State changed: %s (From state: [%d] %s =to=> [%d] %s )\n", | |
303 | di->charge_state == state ? "NO" : "YES", | |
304 | di->charge_state, | |
305 | states[di->charge_state], | |
306 | state, | |
307 | states[state]); | |
308 | ||
309 | di->charge_state = state; | |
310 | } | |
311 | ||
4dcdf577 LJ |
312 | static int abx500_chargalg_check_charger_enable(struct abx500_chargalg *di) |
313 | { | |
314 | switch (di->charge_state) { | |
315 | case STATE_NORMAL: | |
316 | case STATE_MAINTENANCE_A: | |
317 | case STATE_MAINTENANCE_B: | |
318 | break; | |
319 | default: | |
320 | return 0; | |
321 | } | |
322 | ||
323 | if (di->chg_info.charger_type & USB_CHG) { | |
324 | return di->usb_chg->ops.check_enable(di->usb_chg, | |
325 | di->bm->bat_type[di->bm->batt_id].normal_vol_lvl, | |
326 | di->bm->bat_type[di->bm->batt_id].normal_cur_lvl); | |
327 | } else if ((di->chg_info.charger_type & AC_CHG) && | |
328 | !(di->ac_chg->external)) { | |
329 | return di->ac_chg->ops.check_enable(di->ac_chg, | |
330 | di->bm->bat_type[di->bm->batt_id].normal_vol_lvl, | |
331 | di->bm->bat_type[di->bm->batt_id].normal_cur_lvl); | |
332 | } | |
333 | return 0; | |
334 | } | |
335 | ||
1668f811 AM |
336 | /** |
337 | * abx500_chargalg_check_charger_connection() - Check charger connection change | |
338 | * @di: pointer to the abx500_chargalg structure | |
339 | * | |
340 | * This function will check if there is a change in the charger connection | |
341 | * and change charge state accordingly. AC has precedence over USB. | |
342 | */ | |
343 | static int abx500_chargalg_check_charger_connection(struct abx500_chargalg *di) | |
344 | { | |
345 | if (di->chg_info.conn_chg != di->chg_info.prev_conn_chg || | |
346 | di->susp_status.suspended_change) { | |
347 | /* | |
348 | * Charger state changed or suspension | |
349 | * has changed since last update | |
350 | */ | |
351 | if ((di->chg_info.conn_chg & AC_CHG) && | |
352 | !di->susp_status.ac_suspended) { | |
353 | dev_dbg(di->dev, "Charging source is AC\n"); | |
354 | if (di->chg_info.charger_type != AC_CHG) { | |
355 | di->chg_info.charger_type = AC_CHG; | |
356 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
357 | } | |
358 | } else if ((di->chg_info.conn_chg & USB_CHG) && | |
359 | !di->susp_status.usb_suspended) { | |
360 | dev_dbg(di->dev, "Charging source is USB\n"); | |
361 | di->chg_info.charger_type = USB_CHG; | |
362 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
363 | } else if (di->chg_info.conn_chg && | |
364 | (di->susp_status.ac_suspended || | |
365 | di->susp_status.usb_suspended)) { | |
366 | dev_dbg(di->dev, "Charging is suspended\n"); | |
367 | di->chg_info.charger_type = NO_CHG; | |
368 | abx500_chargalg_state_to(di, STATE_SUSPENDED_INIT); | |
369 | } else { | |
370 | dev_dbg(di->dev, "Charging source is OFF\n"); | |
371 | di->chg_info.charger_type = NO_CHG; | |
372 | abx500_chargalg_state_to(di, STATE_HANDHELD_INIT); | |
373 | } | |
374 | di->chg_info.prev_conn_chg = di->chg_info.conn_chg; | |
375 | di->susp_status.suspended_change = false; | |
376 | } | |
377 | return di->chg_info.conn_chg; | |
378 | } | |
379 | ||
380 | /** | |
381 | * abx500_chargalg_start_safety_timer() - Start charging safety timer | |
382 | * @di: pointer to the abx500_chargalg structure | |
383 | * | |
384 | * The safety timer is used to avoid overcharging of old or bad batteries. | |
385 | * There are different timers for AC and USB | |
386 | */ | |
387 | static void abx500_chargalg_start_safety_timer(struct abx500_chargalg *di) | |
388 | { | |
389 | unsigned long timer_expiration = 0; | |
390 | ||
391 | switch (di->chg_info.charger_type) { | |
392 | case AC_CHG: | |
393 | timer_expiration = | |
394 | round_jiffies(jiffies + | |
b0284de0 | 395 | (di->bm->main_safety_tmr_h * 3600 * HZ)); |
1668f811 AM |
396 | break; |
397 | ||
398 | case USB_CHG: | |
399 | timer_expiration = | |
400 | round_jiffies(jiffies + | |
b0284de0 | 401 | (di->bm->usb_safety_tmr_h * 3600 * HZ)); |
1668f811 AM |
402 | break; |
403 | ||
404 | default: | |
405 | dev_err(di->dev, "Unknown charger to charge from\n"); | |
406 | break; | |
407 | } | |
408 | ||
409 | di->events.safety_timer_expired = false; | |
410 | di->safety_timer.expires = timer_expiration; | |
411 | if (!timer_pending(&di->safety_timer)) | |
412 | add_timer(&di->safety_timer); | |
413 | else | |
414 | mod_timer(&di->safety_timer, timer_expiration); | |
415 | } | |
416 | ||
417 | /** | |
418 | * abx500_chargalg_stop_safety_timer() - Stop charging safety timer | |
419 | * @di: pointer to the abx500_chargalg structure | |
420 | * | |
421 | * The safety timer is stopped whenever the NORMAL state is exited | |
422 | */ | |
423 | static void abx500_chargalg_stop_safety_timer(struct abx500_chargalg *di) | |
424 | { | |
425 | di->events.safety_timer_expired = false; | |
426 | del_timer(&di->safety_timer); | |
427 | } | |
428 | ||
429 | /** | |
430 | * abx500_chargalg_start_maintenance_timer() - Start charging maintenance timer | |
431 | * @di: pointer to the abx500_chargalg structure | |
432 | * @duration: duration of ther maintenance timer in hours | |
433 | * | |
434 | * The maintenance timer is used to maintain the charge in the battery once | |
435 | * the battery is considered full. These timers are chosen to match the | |
436 | * discharge curve of the battery | |
437 | */ | |
438 | static void abx500_chargalg_start_maintenance_timer(struct abx500_chargalg *di, | |
439 | int duration) | |
440 | { | |
441 | unsigned long timer_expiration; | |
442 | ||
443 | /* Convert from hours to jiffies */ | |
444 | timer_expiration = round_jiffies(jiffies + (duration * 3600 * HZ)); | |
445 | ||
446 | di->events.maintenance_timer_expired = false; | |
447 | di->maintenance_timer.expires = timer_expiration; | |
448 | if (!timer_pending(&di->maintenance_timer)) | |
449 | add_timer(&di->maintenance_timer); | |
450 | else | |
451 | mod_timer(&di->maintenance_timer, timer_expiration); | |
452 | } | |
453 | ||
454 | /** | |
455 | * abx500_chargalg_stop_maintenance_timer() - Stop maintenance timer | |
456 | * @di: pointer to the abx500_chargalg structure | |
457 | * | |
458 | * The maintenance timer is stopped whenever maintenance ends or when another | |
459 | * state is entered | |
460 | */ | |
461 | static void abx500_chargalg_stop_maintenance_timer(struct abx500_chargalg *di) | |
462 | { | |
463 | di->events.maintenance_timer_expired = false; | |
464 | del_timer(&di->maintenance_timer); | |
465 | } | |
466 | ||
467 | /** | |
468 | * abx500_chargalg_kick_watchdog() - Kick charger watchdog | |
469 | * @di: pointer to the abx500_chargalg structure | |
470 | * | |
471 | * The charger watchdog have to be kicked periodically whenever the charger is | |
472 | * on, else the ABB will reset the system | |
473 | */ | |
474 | static int abx500_chargalg_kick_watchdog(struct abx500_chargalg *di) | |
475 | { | |
476 | /* Check if charger exists and kick watchdog if charging */ | |
477 | if (di->ac_chg && di->ac_chg->ops.kick_wd && | |
e07a5645 LP |
478 | di->chg_info.online_chg & AC_CHG) { |
479 | /* | |
480 | * If AB charger watchdog expired, pm2xxx charging | |
481 | * gets disabled. To be safe, kick both AB charger watchdog | |
482 | * and pm2xxx watchdog. | |
483 | */ | |
484 | if (di->ac_chg->external && | |
485 | di->usb_chg && di->usb_chg->ops.kick_wd) | |
486 | di->usb_chg->ops.kick_wd(di->usb_chg); | |
487 | ||
1668f811 | 488 | return di->ac_chg->ops.kick_wd(di->ac_chg); |
e07a5645 | 489 | } |
1668f811 AM |
490 | else if (di->usb_chg && di->usb_chg->ops.kick_wd && |
491 | di->chg_info.online_chg & USB_CHG) | |
492 | return di->usb_chg->ops.kick_wd(di->usb_chg); | |
493 | ||
494 | return -ENXIO; | |
495 | } | |
496 | ||
497 | /** | |
498 | * abx500_chargalg_ac_en() - Turn on/off the AC charger | |
499 | * @di: pointer to the abx500_chargalg structure | |
500 | * @enable: charger on/off | |
501 | * @vset: requested charger output voltage | |
502 | * @iset: requested charger output current | |
503 | * | |
504 | * The AC charger will be turned on/off with the requested charge voltage and | |
505 | * current | |
506 | */ | |
507 | static int abx500_chargalg_ac_en(struct abx500_chargalg *di, int enable, | |
508 | int vset, int iset) | |
509 | { | |
8891716e LJ |
510 | static int abx500_chargalg_ex_ac_enable_toggle; |
511 | ||
1668f811 AM |
512 | if (!di->ac_chg || !di->ac_chg->ops.enable) |
513 | return -ENXIO; | |
514 | ||
515 | /* Select maximum of what both the charger and the battery supports */ | |
516 | if (di->ac_chg->max_out_volt) | |
517 | vset = min(vset, di->ac_chg->max_out_volt); | |
518 | if (di->ac_chg->max_out_curr) | |
519 | iset = min(iset, di->ac_chg->max_out_curr); | |
520 | ||
521 | di->chg_info.ac_iset = iset; | |
522 | di->chg_info.ac_vset = vset; | |
523 | ||
8891716e LJ |
524 | /* Enable external charger */ |
525 | if (enable && di->ac_chg->external && | |
526 | !abx500_chargalg_ex_ac_enable_toggle) { | |
527 | blocking_notifier_call_chain(&charger_notifier_list, | |
528 | 0, di->dev); | |
529 | abx500_chargalg_ex_ac_enable_toggle++; | |
530 | } | |
531 | ||
1668f811 AM |
532 | return di->ac_chg->ops.enable(di->ac_chg, enable, vset, iset); |
533 | } | |
534 | ||
535 | /** | |
536 | * abx500_chargalg_usb_en() - Turn on/off the USB charger | |
537 | * @di: pointer to the abx500_chargalg structure | |
538 | * @enable: charger on/off | |
539 | * @vset: requested charger output voltage | |
540 | * @iset: requested charger output current | |
541 | * | |
542 | * The USB charger will be turned on/off with the requested charge voltage and | |
543 | * current | |
544 | */ | |
545 | static int abx500_chargalg_usb_en(struct abx500_chargalg *di, int enable, | |
546 | int vset, int iset) | |
547 | { | |
548 | if (!di->usb_chg || !di->usb_chg->ops.enable) | |
549 | return -ENXIO; | |
550 | ||
551 | /* Select maximum of what both the charger and the battery supports */ | |
552 | if (di->usb_chg->max_out_volt) | |
553 | vset = min(vset, di->usb_chg->max_out_volt); | |
554 | if (di->usb_chg->max_out_curr) | |
555 | iset = min(iset, di->usb_chg->max_out_curr); | |
556 | ||
557 | di->chg_info.usb_iset = iset; | |
558 | di->chg_info.usb_vset = vset; | |
559 | ||
560 | return di->usb_chg->ops.enable(di->usb_chg, enable, vset, iset); | |
561 | } | |
562 | ||
563 | /** | |
564 | * abx500_chargalg_update_chg_curr() - Update charger current | |
565 | * @di: pointer to the abx500_chargalg structure | |
566 | * @iset: requested charger output current | |
567 | * | |
568 | * The charger output current will be updated for the charger | |
569 | * that is currently in use | |
570 | */ | |
571 | static int abx500_chargalg_update_chg_curr(struct abx500_chargalg *di, | |
572 | int iset) | |
573 | { | |
574 | /* Check if charger exists and update current if charging */ | |
575 | if (di->ac_chg && di->ac_chg->ops.update_curr && | |
576 | di->chg_info.charger_type & AC_CHG) { | |
577 | /* | |
578 | * Select maximum of what both the charger | |
579 | * and the battery supports | |
580 | */ | |
581 | if (di->ac_chg->max_out_curr) | |
582 | iset = min(iset, di->ac_chg->max_out_curr); | |
583 | ||
584 | di->chg_info.ac_iset = iset; | |
585 | ||
586 | return di->ac_chg->ops.update_curr(di->ac_chg, iset); | |
587 | } else if (di->usb_chg && di->usb_chg->ops.update_curr && | |
588 | di->chg_info.charger_type & USB_CHG) { | |
589 | /* | |
590 | * Select maximum of what both the charger | |
591 | * and the battery supports | |
592 | */ | |
593 | if (di->usb_chg->max_out_curr) | |
594 | iset = min(iset, di->usb_chg->max_out_curr); | |
595 | ||
596 | di->chg_info.usb_iset = iset; | |
597 | ||
598 | return di->usb_chg->ops.update_curr(di->usb_chg, iset); | |
599 | } | |
600 | ||
601 | return -ENXIO; | |
602 | } | |
603 | ||
604 | /** | |
605 | * abx500_chargalg_stop_charging() - Stop charging | |
606 | * @di: pointer to the abx500_chargalg structure | |
607 | * | |
608 | * This function is called from any state where charging should be stopped. | |
609 | * All charging is disabled and all status parameters and timers are changed | |
610 | * accordingly | |
611 | */ | |
612 | static void abx500_chargalg_stop_charging(struct abx500_chargalg *di) | |
613 | { | |
614 | abx500_chargalg_ac_en(di, false, 0, 0); | |
615 | abx500_chargalg_usb_en(di, false, 0, 0); | |
616 | abx500_chargalg_stop_safety_timer(di); | |
617 | abx500_chargalg_stop_maintenance_timer(di); | |
618 | di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
619 | di->maintenance_chg = false; | |
620 | cancel_delayed_work(&di->chargalg_wd_work); | |
621 | power_supply_changed(&di->chargalg_psy); | |
622 | } | |
623 | ||
624 | /** | |
625 | * abx500_chargalg_hold_charging() - Pauses charging | |
626 | * @di: pointer to the abx500_chargalg structure | |
627 | * | |
628 | * This function is called in the case where maintenance charging has been | |
629 | * disabled and instead a battery voltage mode is entered to check when the | |
630 | * battery voltage has reached a certain recharge voltage | |
631 | */ | |
632 | static void abx500_chargalg_hold_charging(struct abx500_chargalg *di) | |
633 | { | |
634 | abx500_chargalg_ac_en(di, false, 0, 0); | |
635 | abx500_chargalg_usb_en(di, false, 0, 0); | |
636 | abx500_chargalg_stop_safety_timer(di); | |
637 | abx500_chargalg_stop_maintenance_timer(di); | |
638 | di->charge_status = POWER_SUPPLY_STATUS_CHARGING; | |
639 | di->maintenance_chg = false; | |
640 | cancel_delayed_work(&di->chargalg_wd_work); | |
641 | power_supply_changed(&di->chargalg_psy); | |
642 | } | |
643 | ||
644 | /** | |
645 | * abx500_chargalg_start_charging() - Start the charger | |
646 | * @di: pointer to the abx500_chargalg structure | |
647 | * @vset: requested charger output voltage | |
648 | * @iset: requested charger output current | |
649 | * | |
650 | * A charger will be enabled depending on the requested charger type that was | |
651 | * detected previously. | |
652 | */ | |
653 | static void abx500_chargalg_start_charging(struct abx500_chargalg *di, | |
654 | int vset, int iset) | |
655 | { | |
3edebfcd LJ |
656 | bool start_chargalg_wd = true; |
657 | ||
1668f811 AM |
658 | switch (di->chg_info.charger_type) { |
659 | case AC_CHG: | |
660 | dev_dbg(di->dev, | |
661 | "AC parameters: Vset %d, Ich %d\n", vset, iset); | |
662 | abx500_chargalg_usb_en(di, false, 0, 0); | |
663 | abx500_chargalg_ac_en(di, true, vset, iset); | |
664 | break; | |
665 | ||
666 | case USB_CHG: | |
667 | dev_dbg(di->dev, | |
668 | "USB parameters: Vset %d, Ich %d\n", vset, iset); | |
669 | abx500_chargalg_ac_en(di, false, 0, 0); | |
670 | abx500_chargalg_usb_en(di, true, vset, iset); | |
671 | break; | |
672 | ||
673 | default: | |
674 | dev_err(di->dev, "Unknown charger to charge from\n"); | |
3edebfcd | 675 | start_chargalg_wd = false; |
1668f811 AM |
676 | break; |
677 | } | |
3edebfcd LJ |
678 | |
679 | if (start_chargalg_wd && !delayed_work_pending(&di->chargalg_wd_work)) | |
680 | queue_delayed_work(di->chargalg_wq, &di->chargalg_wd_work, 0); | |
1668f811 AM |
681 | } |
682 | ||
683 | /** | |
684 | * abx500_chargalg_check_temp() - Check battery temperature ranges | |
685 | * @di: pointer to the abx500_chargalg structure | |
686 | * | |
687 | * The battery temperature is checked against the predefined limits and the | |
688 | * charge state is changed accordingly | |
689 | */ | |
690 | static void abx500_chargalg_check_temp(struct abx500_chargalg *di) | |
691 | { | |
b0284de0 LJ |
692 | if (di->batt_data.temp > (di->bm->temp_low + di->t_hyst_norm) && |
693 | di->batt_data.temp < (di->bm->temp_high - di->t_hyst_norm)) { | |
1668f811 AM |
694 | /* Temp OK! */ |
695 | di->events.btemp_underover = false; | |
696 | di->events.btemp_lowhigh = false; | |
697 | di->t_hyst_norm = 0; | |
698 | di->t_hyst_lowhigh = 0; | |
699 | } else { | |
b0284de0 | 700 | if (((di->batt_data.temp >= di->bm->temp_high) && |
1668f811 | 701 | (di->batt_data.temp < |
b0284de0 | 702 | (di->bm->temp_over - di->t_hyst_lowhigh))) || |
1668f811 | 703 | ((di->batt_data.temp > |
b0284de0 LJ |
704 | (di->bm->temp_under + di->t_hyst_lowhigh)) && |
705 | (di->batt_data.temp <= di->bm->temp_low))) { | |
1668f811 AM |
706 | /* TEMP minor!!!!! */ |
707 | di->events.btemp_underover = false; | |
708 | di->events.btemp_lowhigh = true; | |
b0284de0 | 709 | di->t_hyst_norm = di->bm->temp_hysteresis; |
1668f811 | 710 | di->t_hyst_lowhigh = 0; |
b0284de0 LJ |
711 | } else if (di->batt_data.temp <= di->bm->temp_under || |
712 | di->batt_data.temp >= di->bm->temp_over) { | |
1668f811 AM |
713 | /* TEMP major!!!!! */ |
714 | di->events.btemp_underover = true; | |
715 | di->events.btemp_lowhigh = false; | |
716 | di->t_hyst_norm = 0; | |
b0284de0 | 717 | di->t_hyst_lowhigh = di->bm->temp_hysteresis; |
1668f811 AM |
718 | } else { |
719 | /* Within hysteresis */ | |
720 | dev_dbg(di->dev, "Within hysteresis limit temp: %d " | |
721 | "hyst_lowhigh %d, hyst normal %d\n", | |
722 | di->batt_data.temp, di->t_hyst_lowhigh, | |
723 | di->t_hyst_norm); | |
724 | } | |
725 | } | |
726 | } | |
727 | ||
728 | /** | |
729 | * abx500_chargalg_check_charger_voltage() - Check charger voltage | |
730 | * @di: pointer to the abx500_chargalg structure | |
731 | * | |
732 | * Charger voltage is checked against maximum limit | |
733 | */ | |
734 | static void abx500_chargalg_check_charger_voltage(struct abx500_chargalg *di) | |
735 | { | |
b0284de0 | 736 | if (di->chg_info.usb_volt > di->bm->chg_params->usb_volt_max) |
1668f811 AM |
737 | di->chg_info.usb_chg_ok = false; |
738 | else | |
739 | di->chg_info.usb_chg_ok = true; | |
740 | ||
b0284de0 | 741 | if (di->chg_info.ac_volt > di->bm->chg_params->ac_volt_max) |
1668f811 AM |
742 | di->chg_info.ac_chg_ok = false; |
743 | else | |
744 | di->chg_info.ac_chg_ok = true; | |
745 | ||
746 | } | |
747 | ||
748 | /** | |
749 | * abx500_chargalg_end_of_charge() - Check if end-of-charge criteria is fulfilled | |
750 | * @di: pointer to the abx500_chargalg structure | |
751 | * | |
752 | * End-of-charge criteria is fulfilled when the battery voltage is above a | |
753 | * certain limit and the battery current is below a certain limit for a | |
754 | * predefined number of consecutive seconds. If true, the battery is full | |
755 | */ | |
756 | static void abx500_chargalg_end_of_charge(struct abx500_chargalg *di) | |
757 | { | |
758 | if (di->charge_status == POWER_SUPPLY_STATUS_CHARGING && | |
759 | di->charge_state == STATE_NORMAL && | |
760 | !di->maintenance_chg && (di->batt_data.volt >= | |
b0284de0 | 761 | di->bm->bat_type[di->bm->batt_id].termination_vol || |
1668f811 AM |
762 | di->events.usb_cv_active || di->events.ac_cv_active) && |
763 | di->batt_data.avg_curr < | |
b0284de0 | 764 | di->bm->bat_type[di->bm->batt_id].termination_curr && |
1668f811 AM |
765 | di->batt_data.avg_curr > 0) { |
766 | if (++di->eoc_cnt >= EOC_COND_CNT) { | |
767 | di->eoc_cnt = 0; | |
768 | di->charge_status = POWER_SUPPLY_STATUS_FULL; | |
769 | di->maintenance_chg = true; | |
770 | dev_dbg(di->dev, "EOC reached!\n"); | |
771 | power_supply_changed(&di->chargalg_psy); | |
772 | } else { | |
773 | dev_dbg(di->dev, | |
774 | " EOC limit reached for the %d" | |
775 | " time, out of %d before EOC\n", | |
776 | di->eoc_cnt, | |
777 | EOC_COND_CNT); | |
778 | } | |
779 | } else { | |
780 | di->eoc_cnt = 0; | |
781 | } | |
782 | } | |
783 | ||
784 | static void init_maxim_chg_curr(struct abx500_chargalg *di) | |
785 | { | |
786 | di->ccm.original_iset = | |
b0284de0 | 787 | di->bm->bat_type[di->bm->batt_id].normal_cur_lvl; |
1668f811 | 788 | di->ccm.current_iset = |
b0284de0 LJ |
789 | di->bm->bat_type[di->bm->batt_id].normal_cur_lvl; |
790 | di->ccm.test_delta_i = di->bm->maxi->charger_curr_step; | |
791 | di->ccm.max_current = di->bm->maxi->chg_curr; | |
792 | di->ccm.condition_cnt = di->bm->maxi->wait_cycles; | |
1668f811 AM |
793 | di->ccm.level = 0; |
794 | } | |
795 | ||
796 | /** | |
797 | * abx500_chargalg_chg_curr_maxim - increases the charger current to | |
798 | * compensate for the system load | |
799 | * @di pointer to the abx500_chargalg structure | |
800 | * | |
801 | * This maximization function is used to raise the charger current to get the | |
802 | * battery current as close to the optimal value as possible. The battery | |
803 | * current during charging is affected by the system load | |
804 | */ | |
805 | static enum maxim_ret abx500_chargalg_chg_curr_maxim(struct abx500_chargalg *di) | |
806 | { | |
807 | int delta_i; | |
808 | ||
b0284de0 | 809 | if (!di->bm->maxi->ena_maxi) |
1668f811 AM |
810 | return MAXIM_RET_NOACTION; |
811 | ||
812 | delta_i = di->ccm.original_iset - di->batt_data.inst_curr; | |
813 | ||
814 | if (di->events.vbus_collapsed) { | |
815 | dev_dbg(di->dev, "Charger voltage has collapsed %d\n", | |
816 | di->ccm.wait_cnt); | |
817 | if (di->ccm.wait_cnt == 0) { | |
818 | dev_dbg(di->dev, "lowering current\n"); | |
819 | di->ccm.wait_cnt++; | |
b0284de0 | 820 | di->ccm.condition_cnt = di->bm->maxi->wait_cycles; |
1668f811 AM |
821 | di->ccm.max_current = |
822 | di->ccm.current_iset - di->ccm.test_delta_i; | |
823 | di->ccm.current_iset = di->ccm.max_current; | |
824 | di->ccm.level--; | |
825 | return MAXIM_RET_CHANGE; | |
826 | } else { | |
827 | dev_dbg(di->dev, "waiting\n"); | |
828 | /* Let's go in here twice before lowering curr again */ | |
829 | di->ccm.wait_cnt = (di->ccm.wait_cnt + 1) % 3; | |
830 | return MAXIM_RET_NOACTION; | |
831 | } | |
832 | } | |
833 | ||
834 | di->ccm.wait_cnt = 0; | |
835 | ||
836 | if ((di->batt_data.inst_curr > di->ccm.original_iset)) { | |
837 | dev_dbg(di->dev, " Maximization Ibat (%dmA) too high" | |
838 | " (limit %dmA) (current iset: %dmA)!\n", | |
839 | di->batt_data.inst_curr, di->ccm.original_iset, | |
840 | di->ccm.current_iset); | |
841 | ||
842 | if (di->ccm.current_iset == di->ccm.original_iset) | |
843 | return MAXIM_RET_NOACTION; | |
844 | ||
b0284de0 | 845 | di->ccm.condition_cnt = di->bm->maxi->wait_cycles; |
1668f811 AM |
846 | di->ccm.current_iset = di->ccm.original_iset; |
847 | di->ccm.level = 0; | |
848 | ||
849 | return MAXIM_RET_IBAT_TOO_HIGH; | |
850 | } | |
851 | ||
852 | if (delta_i > di->ccm.test_delta_i && | |
853 | (di->ccm.current_iset + di->ccm.test_delta_i) < | |
854 | di->ccm.max_current) { | |
855 | if (di->ccm.condition_cnt-- == 0) { | |
856 | /* Increse the iset with cco.test_delta_i */ | |
b0284de0 | 857 | di->ccm.condition_cnt = di->bm->maxi->wait_cycles; |
1668f811 AM |
858 | di->ccm.current_iset += di->ccm.test_delta_i; |
859 | di->ccm.level++; | |
860 | dev_dbg(di->dev, " Maximization needed, increase" | |
861 | " with %d mA to %dmA (Optimal ibat: %d)" | |
862 | " Level %d\n", | |
863 | di->ccm.test_delta_i, | |
864 | di->ccm.current_iset, | |
865 | di->ccm.original_iset, | |
866 | di->ccm.level); | |
867 | return MAXIM_RET_CHANGE; | |
868 | } else { | |
869 | return MAXIM_RET_NOACTION; | |
870 | } | |
871 | } else { | |
b0284de0 | 872 | di->ccm.condition_cnt = di->bm->maxi->wait_cycles; |
1668f811 AM |
873 | return MAXIM_RET_NOACTION; |
874 | } | |
875 | } | |
876 | ||
877 | static void handle_maxim_chg_curr(struct abx500_chargalg *di) | |
878 | { | |
879 | enum maxim_ret ret; | |
880 | int result; | |
881 | ||
882 | ret = abx500_chargalg_chg_curr_maxim(di); | |
883 | switch (ret) { | |
884 | case MAXIM_RET_CHANGE: | |
885 | result = abx500_chargalg_update_chg_curr(di, | |
886 | di->ccm.current_iset); | |
887 | if (result) | |
888 | dev_err(di->dev, "failed to set chg curr\n"); | |
889 | break; | |
890 | case MAXIM_RET_IBAT_TOO_HIGH: | |
891 | result = abx500_chargalg_update_chg_curr(di, | |
b0284de0 | 892 | di->bm->bat_type[di->bm->batt_id].normal_cur_lvl); |
1668f811 AM |
893 | if (result) |
894 | dev_err(di->dev, "failed to set chg curr\n"); | |
895 | break; | |
896 | ||
897 | case MAXIM_RET_NOACTION: | |
898 | default: | |
899 | /* Do nothing..*/ | |
900 | break; | |
901 | } | |
902 | } | |
903 | ||
904 | static int abx500_chargalg_get_ext_psy_data(struct device *dev, void *data) | |
905 | { | |
906 | struct power_supply *psy; | |
907 | struct power_supply *ext; | |
908 | struct abx500_chargalg *di; | |
909 | union power_supply_propval ret; | |
910 | int i, j; | |
911 | bool psy_found = false; | |
ea402401 | 912 | bool capacity_updated = false; |
1668f811 AM |
913 | |
914 | psy = (struct power_supply *)data; | |
915 | ext = dev_get_drvdata(dev); | |
916 | di = to_abx500_chargalg_device_info(psy); | |
917 | /* For all psy where the driver name appears in any supplied_to */ | |
918 | for (i = 0; i < ext->num_supplicants; i++) { | |
919 | if (!strcmp(ext->supplied_to[i], psy->name)) | |
920 | psy_found = true; | |
921 | } | |
922 | if (!psy_found) | |
923 | return 0; | |
924 | ||
ea402401 MC |
925 | /* |
926 | * If external is not registering 'POWER_SUPPLY_PROP_CAPACITY' to its | |
927 | * property because of handling that sysfs entry on its own, this is | |
928 | * the place to get the battery capacity. | |
929 | */ | |
930 | if (!ext->get_property(ext, POWER_SUPPLY_PROP_CAPACITY, &ret)) { | |
931 | di->batt_data.percent = ret.intval; | |
932 | capacity_updated = true; | |
933 | } | |
934 | ||
1668f811 AM |
935 | /* Go through all properties for the psy */ |
936 | for (j = 0; j < ext->num_properties; j++) { | |
937 | enum power_supply_property prop; | |
938 | prop = ext->properties[j]; | |
939 | ||
940 | /* Initialize chargers if not already done */ | |
941 | if (!di->ac_chg && | |
942 | ext->type == POWER_SUPPLY_TYPE_MAINS) | |
943 | di->ac_chg = psy_to_ux500_charger(ext); | |
944 | else if (!di->usb_chg && | |
945 | ext->type == POWER_SUPPLY_TYPE_USB) | |
946 | di->usb_chg = psy_to_ux500_charger(ext); | |
947 | ||
948 | if (ext->get_property(ext, prop, &ret)) | |
949 | continue; | |
950 | switch (prop) { | |
951 | case POWER_SUPPLY_PROP_PRESENT: | |
952 | switch (ext->type) { | |
953 | case POWER_SUPPLY_TYPE_BATTERY: | |
954 | /* Battery present */ | |
955 | if (ret.intval) | |
956 | di->events.batt_rem = false; | |
957 | /* Battery removed */ | |
958 | else | |
959 | di->events.batt_rem = true; | |
960 | break; | |
961 | case POWER_SUPPLY_TYPE_MAINS: | |
962 | /* AC disconnected */ | |
963 | if (!ret.intval && | |
964 | (di->chg_info.conn_chg & AC_CHG)) { | |
965 | di->chg_info.prev_conn_chg = | |
966 | di->chg_info.conn_chg; | |
967 | di->chg_info.conn_chg &= ~AC_CHG; | |
968 | } | |
969 | /* AC connected */ | |
970 | else if (ret.intval && | |
971 | !(di->chg_info.conn_chg & AC_CHG)) { | |
972 | di->chg_info.prev_conn_chg = | |
973 | di->chg_info.conn_chg; | |
974 | di->chg_info.conn_chg |= AC_CHG; | |
975 | } | |
976 | break; | |
977 | case POWER_SUPPLY_TYPE_USB: | |
978 | /* USB disconnected */ | |
979 | if (!ret.intval && | |
980 | (di->chg_info.conn_chg & USB_CHG)) { | |
981 | di->chg_info.prev_conn_chg = | |
982 | di->chg_info.conn_chg; | |
983 | di->chg_info.conn_chg &= ~USB_CHG; | |
984 | } | |
985 | /* USB connected */ | |
986 | else if (ret.intval && | |
987 | !(di->chg_info.conn_chg & USB_CHG)) { | |
988 | di->chg_info.prev_conn_chg = | |
989 | di->chg_info.conn_chg; | |
990 | di->chg_info.conn_chg |= USB_CHG; | |
991 | } | |
992 | break; | |
993 | default: | |
994 | break; | |
995 | } | |
996 | break; | |
997 | ||
998 | case POWER_SUPPLY_PROP_ONLINE: | |
999 | switch (ext->type) { | |
1000 | case POWER_SUPPLY_TYPE_BATTERY: | |
1001 | break; | |
1002 | case POWER_SUPPLY_TYPE_MAINS: | |
1003 | /* AC offline */ | |
1004 | if (!ret.intval && | |
1005 | (di->chg_info.online_chg & AC_CHG)) { | |
1006 | di->chg_info.prev_online_chg = | |
1007 | di->chg_info.online_chg; | |
1008 | di->chg_info.online_chg &= ~AC_CHG; | |
1009 | } | |
1010 | /* AC online */ | |
1011 | else if (ret.intval && | |
1012 | !(di->chg_info.online_chg & AC_CHG)) { | |
1013 | di->chg_info.prev_online_chg = | |
1014 | di->chg_info.online_chg; | |
1015 | di->chg_info.online_chg |= AC_CHG; | |
1016 | queue_delayed_work(di->chargalg_wq, | |
1017 | &di->chargalg_wd_work, 0); | |
1018 | } | |
1019 | break; | |
1020 | case POWER_SUPPLY_TYPE_USB: | |
1021 | /* USB offline */ | |
1022 | if (!ret.intval && | |
1023 | (di->chg_info.online_chg & USB_CHG)) { | |
1024 | di->chg_info.prev_online_chg = | |
1025 | di->chg_info.online_chg; | |
1026 | di->chg_info.online_chg &= ~USB_CHG; | |
1027 | } | |
1028 | /* USB online */ | |
1029 | else if (ret.intval && | |
1030 | !(di->chg_info.online_chg & USB_CHG)) { | |
1031 | di->chg_info.prev_online_chg = | |
1032 | di->chg_info.online_chg; | |
1033 | di->chg_info.online_chg |= USB_CHG; | |
1034 | queue_delayed_work(di->chargalg_wq, | |
1035 | &di->chargalg_wd_work, 0); | |
1036 | } | |
1037 | break; | |
1038 | default: | |
1039 | break; | |
1040 | } | |
1041 | break; | |
1042 | ||
1043 | case POWER_SUPPLY_PROP_HEALTH: | |
1044 | switch (ext->type) { | |
1045 | case POWER_SUPPLY_TYPE_BATTERY: | |
1046 | break; | |
1047 | case POWER_SUPPLY_TYPE_MAINS: | |
1048 | switch (ret.intval) { | |
1049 | case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE: | |
1050 | di->events.mainextchnotok = true; | |
1051 | di->events.main_thermal_prot = false; | |
1052 | di->events.main_ovv = false; | |
1053 | di->events.ac_wd_expired = false; | |
1054 | break; | |
1055 | case POWER_SUPPLY_HEALTH_DEAD: | |
1056 | di->events.ac_wd_expired = true; | |
1057 | di->events.mainextchnotok = false; | |
1058 | di->events.main_ovv = false; | |
1059 | di->events.main_thermal_prot = false; | |
1060 | break; | |
1061 | case POWER_SUPPLY_HEALTH_COLD: | |
1062 | case POWER_SUPPLY_HEALTH_OVERHEAT: | |
1063 | di->events.main_thermal_prot = true; | |
1064 | di->events.mainextchnotok = false; | |
1065 | di->events.main_ovv = false; | |
1066 | di->events.ac_wd_expired = false; | |
1067 | break; | |
1068 | case POWER_SUPPLY_HEALTH_OVERVOLTAGE: | |
1069 | di->events.main_ovv = true; | |
1070 | di->events.mainextchnotok = false; | |
1071 | di->events.main_thermal_prot = false; | |
1072 | di->events.ac_wd_expired = false; | |
1073 | break; | |
1074 | case POWER_SUPPLY_HEALTH_GOOD: | |
1075 | di->events.main_thermal_prot = false; | |
1076 | di->events.mainextchnotok = false; | |
1077 | di->events.main_ovv = false; | |
1078 | di->events.ac_wd_expired = false; | |
1079 | break; | |
1080 | default: | |
1081 | break; | |
1082 | } | |
1083 | break; | |
1084 | ||
1085 | case POWER_SUPPLY_TYPE_USB: | |
1086 | switch (ret.intval) { | |
1087 | case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE: | |
1088 | di->events.usbchargernotok = true; | |
1089 | di->events.usb_thermal_prot = false; | |
1090 | di->events.vbus_ovv = false; | |
1091 | di->events.usb_wd_expired = false; | |
1092 | break; | |
1093 | case POWER_SUPPLY_HEALTH_DEAD: | |
1094 | di->events.usb_wd_expired = true; | |
1095 | di->events.usbchargernotok = false; | |
1096 | di->events.usb_thermal_prot = false; | |
1097 | di->events.vbus_ovv = false; | |
1098 | break; | |
1099 | case POWER_SUPPLY_HEALTH_COLD: | |
1100 | case POWER_SUPPLY_HEALTH_OVERHEAT: | |
1101 | di->events.usb_thermal_prot = true; | |
1102 | di->events.usbchargernotok = false; | |
1103 | di->events.vbus_ovv = false; | |
1104 | di->events.usb_wd_expired = false; | |
1105 | break; | |
1106 | case POWER_SUPPLY_HEALTH_OVERVOLTAGE: | |
1107 | di->events.vbus_ovv = true; | |
1108 | di->events.usbchargernotok = false; | |
1109 | di->events.usb_thermal_prot = false; | |
1110 | di->events.usb_wd_expired = false; | |
1111 | break; | |
1112 | case POWER_SUPPLY_HEALTH_GOOD: | |
1113 | di->events.usbchargernotok = false; | |
1114 | di->events.usb_thermal_prot = false; | |
1115 | di->events.vbus_ovv = false; | |
1116 | di->events.usb_wd_expired = false; | |
1117 | break; | |
1118 | default: | |
1119 | break; | |
1120 | } | |
1121 | default: | |
1122 | break; | |
1123 | } | |
1124 | break; | |
1125 | ||
1126 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
1127 | switch (ext->type) { | |
1128 | case POWER_SUPPLY_TYPE_BATTERY: | |
1129 | di->batt_data.volt = ret.intval / 1000; | |
1130 | break; | |
1131 | case POWER_SUPPLY_TYPE_MAINS: | |
1132 | di->chg_info.ac_volt = ret.intval / 1000; | |
1133 | break; | |
1134 | case POWER_SUPPLY_TYPE_USB: | |
1135 | di->chg_info.usb_volt = ret.intval / 1000; | |
1136 | break; | |
1137 | default: | |
1138 | break; | |
1139 | } | |
1140 | break; | |
1141 | ||
1142 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
1143 | switch (ext->type) { | |
1144 | case POWER_SUPPLY_TYPE_MAINS: | |
1145 | /* AVG is used to indicate when we are | |
1146 | * in CV mode */ | |
1147 | if (ret.intval) | |
1148 | di->events.ac_cv_active = true; | |
1149 | else | |
1150 | di->events.ac_cv_active = false; | |
1151 | ||
1152 | break; | |
1153 | case POWER_SUPPLY_TYPE_USB: | |
1154 | /* AVG is used to indicate when we are | |
1155 | * in CV mode */ | |
1156 | if (ret.intval) | |
1157 | di->events.usb_cv_active = true; | |
1158 | else | |
1159 | di->events.usb_cv_active = false; | |
1160 | ||
1161 | break; | |
1162 | default: | |
1163 | break; | |
1164 | } | |
1165 | break; | |
1166 | ||
1167 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
1168 | switch (ext->type) { | |
1169 | case POWER_SUPPLY_TYPE_BATTERY: | |
1170 | if (ret.intval) | |
1171 | di->events.batt_unknown = false; | |
1172 | else | |
1173 | di->events.batt_unknown = true; | |
1174 | ||
1175 | break; | |
1176 | default: | |
1177 | break; | |
1178 | } | |
1179 | break; | |
1180 | ||
1181 | case POWER_SUPPLY_PROP_TEMP: | |
1182 | di->batt_data.temp = ret.intval / 10; | |
1183 | break; | |
1184 | ||
1185 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
1186 | switch (ext->type) { | |
1187 | case POWER_SUPPLY_TYPE_MAINS: | |
1188 | di->chg_info.ac_curr = | |
1189 | ret.intval / 1000; | |
1190 | break; | |
1191 | case POWER_SUPPLY_TYPE_USB: | |
1192 | di->chg_info.usb_curr = | |
1193 | ret.intval / 1000; | |
1194 | break; | |
1195 | case POWER_SUPPLY_TYPE_BATTERY: | |
1196 | di->batt_data.inst_curr = ret.intval / 1000; | |
1197 | break; | |
1198 | default: | |
1199 | break; | |
1200 | } | |
1201 | break; | |
1202 | ||
1203 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
1204 | switch (ext->type) { | |
1205 | case POWER_SUPPLY_TYPE_BATTERY: | |
1206 | di->batt_data.avg_curr = ret.intval / 1000; | |
1207 | break; | |
1208 | case POWER_SUPPLY_TYPE_USB: | |
1209 | if (ret.intval) | |
1210 | di->events.vbus_collapsed = true; | |
1211 | else | |
1212 | di->events.vbus_collapsed = false; | |
1213 | break; | |
1214 | default: | |
1215 | break; | |
1216 | } | |
1217 | break; | |
1218 | case POWER_SUPPLY_PROP_CAPACITY: | |
ea402401 MC |
1219 | if (!capacity_updated) |
1220 | di->batt_data.percent = ret.intval; | |
1668f811 AM |
1221 | break; |
1222 | default: | |
1223 | break; | |
1224 | } | |
1225 | } | |
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | /** | |
1230 | * abx500_chargalg_external_power_changed() - callback for power supply changes | |
1231 | * @psy: pointer to the structure power_supply | |
1232 | * | |
1233 | * This function is the entry point of the pointer external_power_changed | |
1234 | * of the structure power_supply. | |
1235 | * This function gets executed when there is a change in any external power | |
1236 | * supply that this driver needs to be notified of. | |
1237 | */ | |
1238 | static void abx500_chargalg_external_power_changed(struct power_supply *psy) | |
1239 | { | |
1240 | struct abx500_chargalg *di = to_abx500_chargalg_device_info(psy); | |
1241 | ||
1242 | /* | |
1243 | * Trigger execution of the algorithm instantly and read | |
1244 | * all power_supply properties there instead | |
1245 | */ | |
1246 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
1247 | } | |
1248 | ||
1249 | /** | |
1250 | * abx500_chargalg_algorithm() - Main function for the algorithm | |
1251 | * @di: pointer to the abx500_chargalg structure | |
1252 | * | |
1253 | * This is the main control function for the charging algorithm. | |
1254 | * It is called periodically or when something happens that will | |
1255 | * trigger a state change | |
1256 | */ | |
1257 | static void abx500_chargalg_algorithm(struct abx500_chargalg *di) | |
1258 | { | |
1259 | int charger_status; | |
4dcdf577 | 1260 | int ret; |
1668f811 AM |
1261 | |
1262 | /* Collect data from all power_supply class devices */ | |
1263 | class_for_each_device(power_supply_class, NULL, | |
1264 | &di->chargalg_psy, abx500_chargalg_get_ext_psy_data); | |
1265 | ||
1266 | abx500_chargalg_end_of_charge(di); | |
1267 | abx500_chargalg_check_temp(di); | |
1268 | abx500_chargalg_check_charger_voltage(di); | |
1269 | ||
1270 | charger_status = abx500_chargalg_check_charger_connection(di); | |
4dcdf577 LJ |
1271 | |
1272 | if (is_ab8500(di->parent)) { | |
1273 | ret = abx500_chargalg_check_charger_enable(di); | |
1274 | if (ret < 0) | |
1275 | dev_err(di->dev, "Checking charger is enabled error" | |
1276 | ": Returned Value %d\n", ret); | |
1277 | } | |
1278 | ||
1668f811 AM |
1279 | /* |
1280 | * First check if we have a charger connected. | |
1281 | * Also we don't allow charging of unknown batteries if configured | |
1282 | * this way | |
1283 | */ | |
1284 | if (!charger_status || | |
b0284de0 | 1285 | (di->events.batt_unknown && !di->bm->chg_unknown_bat)) { |
1668f811 AM |
1286 | if (di->charge_state != STATE_HANDHELD) { |
1287 | di->events.safety_timer_expired = false; | |
1288 | abx500_chargalg_state_to(di, STATE_HANDHELD_INIT); | |
1289 | } | |
1290 | } | |
1291 | ||
1292 | /* If suspended, we should not continue checking the flags */ | |
1293 | else if (di->charge_state == STATE_SUSPENDED_INIT || | |
1294 | di->charge_state == STATE_SUSPENDED) { | |
1295 | /* We don't do anything here, just don,t continue */ | |
1296 | } | |
1297 | ||
1298 | /* Safety timer expiration */ | |
1299 | else if (di->events.safety_timer_expired) { | |
1300 | if (di->charge_state != STATE_SAFETY_TIMER_EXPIRED) | |
1301 | abx500_chargalg_state_to(di, | |
1302 | STATE_SAFETY_TIMER_EXPIRED_INIT); | |
1303 | } | |
1304 | /* | |
1305 | * Check if any interrupts has occured | |
1306 | * that will prevent us from charging | |
1307 | */ | |
1308 | ||
1309 | /* Battery removed */ | |
1310 | else if (di->events.batt_rem) { | |
1311 | if (di->charge_state != STATE_BATT_REMOVED) | |
1312 | abx500_chargalg_state_to(di, STATE_BATT_REMOVED_INIT); | |
1313 | } | |
1314 | /* Main or USB charger not ok. */ | |
1315 | else if (di->events.mainextchnotok || di->events.usbchargernotok) { | |
1316 | /* | |
1317 | * If vbus_collapsed is set, we have to lower the charger | |
1318 | * current, which is done in the normal state below | |
1319 | */ | |
1320 | if (di->charge_state != STATE_CHG_NOT_OK && | |
1321 | !di->events.vbus_collapsed) | |
1322 | abx500_chargalg_state_to(di, STATE_CHG_NOT_OK_INIT); | |
1323 | } | |
1324 | /* VBUS, Main or VBAT OVV. */ | |
1325 | else if (di->events.vbus_ovv || | |
1326 | di->events.main_ovv || | |
1327 | di->events.batt_ovv || | |
1328 | !di->chg_info.usb_chg_ok || | |
1329 | !di->chg_info.ac_chg_ok) { | |
1330 | if (di->charge_state != STATE_OVV_PROTECT) | |
1331 | abx500_chargalg_state_to(di, STATE_OVV_PROTECT_INIT); | |
1332 | } | |
1333 | /* USB Thermal, stop charging */ | |
1334 | else if (di->events.main_thermal_prot || | |
1335 | di->events.usb_thermal_prot) { | |
1336 | if (di->charge_state != STATE_HW_TEMP_PROTECT) | |
1337 | abx500_chargalg_state_to(di, | |
1338 | STATE_HW_TEMP_PROTECT_INIT); | |
1339 | } | |
1340 | /* Battery temp over/under */ | |
1341 | else if (di->events.btemp_underover) { | |
1342 | if (di->charge_state != STATE_TEMP_UNDEROVER) | |
1343 | abx500_chargalg_state_to(di, | |
1344 | STATE_TEMP_UNDEROVER_INIT); | |
1345 | } | |
1346 | /* Watchdog expired */ | |
1347 | else if (di->events.ac_wd_expired || | |
1348 | di->events.usb_wd_expired) { | |
1349 | if (di->charge_state != STATE_WD_EXPIRED) | |
1350 | abx500_chargalg_state_to(di, STATE_WD_EXPIRED_INIT); | |
1351 | } | |
1352 | /* Battery temp high/low */ | |
1353 | else if (di->events.btemp_lowhigh) { | |
1354 | if (di->charge_state != STATE_TEMP_LOWHIGH) | |
1355 | abx500_chargalg_state_to(di, STATE_TEMP_LOWHIGH_INIT); | |
1356 | } | |
1357 | ||
1358 | dev_dbg(di->dev, | |
1359 | "[CHARGALG] Vb %d Ib_avg %d Ib_inst %d Tb %d Cap %d Maint %d " | |
1360 | "State %s Active_chg %d Chg_status %d AC %d USB %d " | |
1361 | "AC_online %d USB_online %d AC_CV %d USB_CV %d AC_I %d " | |
1362 | "USB_I %d AC_Vset %d AC_Iset %d USB_Vset %d USB_Iset %d\n", | |
1363 | di->batt_data.volt, | |
1364 | di->batt_data.avg_curr, | |
1365 | di->batt_data.inst_curr, | |
1366 | di->batt_data.temp, | |
1367 | di->batt_data.percent, | |
1368 | di->maintenance_chg, | |
1369 | states[di->charge_state], | |
1370 | di->chg_info.charger_type, | |
1371 | di->charge_status, | |
1372 | di->chg_info.conn_chg & AC_CHG, | |
1373 | di->chg_info.conn_chg & USB_CHG, | |
1374 | di->chg_info.online_chg & AC_CHG, | |
1375 | di->chg_info.online_chg & USB_CHG, | |
1376 | di->events.ac_cv_active, | |
1377 | di->events.usb_cv_active, | |
1378 | di->chg_info.ac_curr, | |
1379 | di->chg_info.usb_curr, | |
1380 | di->chg_info.ac_vset, | |
1381 | di->chg_info.ac_iset, | |
1382 | di->chg_info.usb_vset, | |
1383 | di->chg_info.usb_iset); | |
1384 | ||
1385 | switch (di->charge_state) { | |
1386 | case STATE_HANDHELD_INIT: | |
1387 | abx500_chargalg_stop_charging(di); | |
1388 | di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING; | |
1389 | abx500_chargalg_state_to(di, STATE_HANDHELD); | |
1390 | /* Intentional fallthrough */ | |
1391 | ||
1392 | case STATE_HANDHELD: | |
1393 | break; | |
1394 | ||
1395 | case STATE_SUSPENDED_INIT: | |
1396 | if (di->susp_status.ac_suspended) | |
1397 | abx500_chargalg_ac_en(di, false, 0, 0); | |
1398 | if (di->susp_status.usb_suspended) | |
1399 | abx500_chargalg_usb_en(di, false, 0, 0); | |
1400 | abx500_chargalg_stop_safety_timer(di); | |
1401 | abx500_chargalg_stop_maintenance_timer(di); | |
1402 | di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
1403 | di->maintenance_chg = false; | |
1404 | abx500_chargalg_state_to(di, STATE_SUSPENDED); | |
1405 | power_supply_changed(&di->chargalg_psy); | |
1406 | /* Intentional fallthrough */ | |
1407 | ||
1408 | case STATE_SUSPENDED: | |
1409 | /* CHARGING is suspended */ | |
1410 | break; | |
1411 | ||
1412 | case STATE_BATT_REMOVED_INIT: | |
1413 | abx500_chargalg_stop_charging(di); | |
1414 | abx500_chargalg_state_to(di, STATE_BATT_REMOVED); | |
1415 | /* Intentional fallthrough */ | |
1416 | ||
1417 | case STATE_BATT_REMOVED: | |
1418 | if (!di->events.batt_rem) | |
1419 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1420 | break; | |
1421 | ||
1422 | case STATE_HW_TEMP_PROTECT_INIT: | |
1423 | abx500_chargalg_stop_charging(di); | |
1424 | abx500_chargalg_state_to(di, STATE_HW_TEMP_PROTECT); | |
1425 | /* Intentional fallthrough */ | |
1426 | ||
1427 | case STATE_HW_TEMP_PROTECT: | |
1428 | if (!di->events.main_thermal_prot && | |
1429 | !di->events.usb_thermal_prot) | |
1430 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1431 | break; | |
1432 | ||
1433 | case STATE_OVV_PROTECT_INIT: | |
1434 | abx500_chargalg_stop_charging(di); | |
1435 | abx500_chargalg_state_to(di, STATE_OVV_PROTECT); | |
1436 | /* Intentional fallthrough */ | |
1437 | ||
1438 | case STATE_OVV_PROTECT: | |
1439 | if (!di->events.vbus_ovv && | |
1440 | !di->events.main_ovv && | |
1441 | !di->events.batt_ovv && | |
1442 | di->chg_info.usb_chg_ok && | |
1443 | di->chg_info.ac_chg_ok) | |
1444 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1445 | break; | |
1446 | ||
1447 | case STATE_CHG_NOT_OK_INIT: | |
1448 | abx500_chargalg_stop_charging(di); | |
1449 | abx500_chargalg_state_to(di, STATE_CHG_NOT_OK); | |
1450 | /* Intentional fallthrough */ | |
1451 | ||
1452 | case STATE_CHG_NOT_OK: | |
1453 | if (!di->events.mainextchnotok && | |
1454 | !di->events.usbchargernotok) | |
1455 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1456 | break; | |
1457 | ||
1458 | case STATE_SAFETY_TIMER_EXPIRED_INIT: | |
1459 | abx500_chargalg_stop_charging(di); | |
1460 | abx500_chargalg_state_to(di, STATE_SAFETY_TIMER_EXPIRED); | |
1461 | /* Intentional fallthrough */ | |
1462 | ||
1463 | case STATE_SAFETY_TIMER_EXPIRED: | |
1464 | /* We exit this state when charger is removed */ | |
1465 | break; | |
1466 | ||
1467 | case STATE_NORMAL_INIT: | |
1468 | abx500_chargalg_start_charging(di, | |
b0284de0 LJ |
1469 | di->bm->bat_type[di->bm->batt_id].normal_vol_lvl, |
1470 | di->bm->bat_type[di->bm->batt_id].normal_cur_lvl); | |
1668f811 AM |
1471 | abx500_chargalg_state_to(di, STATE_NORMAL); |
1472 | abx500_chargalg_start_safety_timer(di); | |
1473 | abx500_chargalg_stop_maintenance_timer(di); | |
1474 | init_maxim_chg_curr(di); | |
1475 | di->charge_status = POWER_SUPPLY_STATUS_CHARGING; | |
1476 | di->eoc_cnt = 0; | |
1477 | di->maintenance_chg = false; | |
1478 | power_supply_changed(&di->chargalg_psy); | |
1479 | ||
1480 | break; | |
1481 | ||
1482 | case STATE_NORMAL: | |
1483 | handle_maxim_chg_curr(di); | |
1484 | if (di->charge_status == POWER_SUPPLY_STATUS_FULL && | |
1485 | di->maintenance_chg) { | |
b0284de0 | 1486 | if (di->bm->no_maintenance) |
1668f811 AM |
1487 | abx500_chargalg_state_to(di, |
1488 | STATE_WAIT_FOR_RECHARGE_INIT); | |
1489 | else | |
1490 | abx500_chargalg_state_to(di, | |
1491 | STATE_MAINTENANCE_A_INIT); | |
1492 | } | |
1493 | break; | |
1494 | ||
1495 | /* This state will be used when the maintenance state is disabled */ | |
1496 | case STATE_WAIT_FOR_RECHARGE_INIT: | |
1497 | abx500_chargalg_hold_charging(di); | |
1498 | abx500_chargalg_state_to(di, STATE_WAIT_FOR_RECHARGE); | |
1668f811 AM |
1499 | /* Intentional fallthrough */ |
1500 | ||
1501 | case STATE_WAIT_FOR_RECHARGE: | |
ea402401 MC |
1502 | if (di->batt_data.percent <= |
1503 | di->bm->bat_type[di->bm->batt_id]. | |
1504 | recharge_cap) | |
1505 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1668f811 AM |
1506 | break; |
1507 | ||
1508 | case STATE_MAINTENANCE_A_INIT: | |
1509 | abx500_chargalg_stop_safety_timer(di); | |
1510 | abx500_chargalg_start_maintenance_timer(di, | |
b0284de0 LJ |
1511 | di->bm->bat_type[ |
1512 | di->bm->batt_id].maint_a_chg_timer_h); | |
1668f811 | 1513 | abx500_chargalg_start_charging(di, |
b0284de0 LJ |
1514 | di->bm->bat_type[ |
1515 | di->bm->batt_id].maint_a_vol_lvl, | |
1516 | di->bm->bat_type[ | |
1517 | di->bm->batt_id].maint_a_cur_lvl); | |
1668f811 AM |
1518 | abx500_chargalg_state_to(di, STATE_MAINTENANCE_A); |
1519 | power_supply_changed(&di->chargalg_psy); | |
1520 | /* Intentional fallthrough*/ | |
1521 | ||
1522 | case STATE_MAINTENANCE_A: | |
1523 | if (di->events.maintenance_timer_expired) { | |
1524 | abx500_chargalg_stop_maintenance_timer(di); | |
1525 | abx500_chargalg_state_to(di, STATE_MAINTENANCE_B_INIT); | |
1526 | } | |
1527 | break; | |
1528 | ||
1529 | case STATE_MAINTENANCE_B_INIT: | |
1530 | abx500_chargalg_start_maintenance_timer(di, | |
b0284de0 LJ |
1531 | di->bm->bat_type[ |
1532 | di->bm->batt_id].maint_b_chg_timer_h); | |
1668f811 | 1533 | abx500_chargalg_start_charging(di, |
b0284de0 LJ |
1534 | di->bm->bat_type[ |
1535 | di->bm->batt_id].maint_b_vol_lvl, | |
1536 | di->bm->bat_type[ | |
1537 | di->bm->batt_id].maint_b_cur_lvl); | |
1668f811 AM |
1538 | abx500_chargalg_state_to(di, STATE_MAINTENANCE_B); |
1539 | power_supply_changed(&di->chargalg_psy); | |
1540 | /* Intentional fallthrough*/ | |
1541 | ||
1542 | case STATE_MAINTENANCE_B: | |
1543 | if (di->events.maintenance_timer_expired) { | |
1544 | abx500_chargalg_stop_maintenance_timer(di); | |
1545 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1546 | } | |
1547 | break; | |
1548 | ||
1549 | case STATE_TEMP_LOWHIGH_INIT: | |
1550 | abx500_chargalg_start_charging(di, | |
b0284de0 LJ |
1551 | di->bm->bat_type[ |
1552 | di->bm->batt_id].low_high_vol_lvl, | |
1553 | di->bm->bat_type[ | |
1554 | di->bm->batt_id].low_high_cur_lvl); | |
1668f811 AM |
1555 | abx500_chargalg_stop_maintenance_timer(di); |
1556 | di->charge_status = POWER_SUPPLY_STATUS_CHARGING; | |
1557 | abx500_chargalg_state_to(di, STATE_TEMP_LOWHIGH); | |
1558 | power_supply_changed(&di->chargalg_psy); | |
1559 | /* Intentional fallthrough */ | |
1560 | ||
1561 | case STATE_TEMP_LOWHIGH: | |
1562 | if (!di->events.btemp_lowhigh) | |
1563 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1564 | break; | |
1565 | ||
1566 | case STATE_WD_EXPIRED_INIT: | |
1567 | abx500_chargalg_stop_charging(di); | |
1568 | abx500_chargalg_state_to(di, STATE_WD_EXPIRED); | |
1569 | /* Intentional fallthrough */ | |
1570 | ||
1571 | case STATE_WD_EXPIRED: | |
1572 | if (!di->events.ac_wd_expired && | |
1573 | !di->events.usb_wd_expired) | |
1574 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1575 | break; | |
1576 | ||
1577 | case STATE_TEMP_UNDEROVER_INIT: | |
1578 | abx500_chargalg_stop_charging(di); | |
1579 | abx500_chargalg_state_to(di, STATE_TEMP_UNDEROVER); | |
1580 | /* Intentional fallthrough */ | |
1581 | ||
1582 | case STATE_TEMP_UNDEROVER: | |
1583 | if (!di->events.btemp_underover) | |
1584 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1585 | break; | |
1586 | } | |
1587 | ||
1588 | /* Start charging directly if the new state is a charge state */ | |
1589 | if (di->charge_state == STATE_NORMAL_INIT || | |
1590 | di->charge_state == STATE_MAINTENANCE_A_INIT || | |
1591 | di->charge_state == STATE_MAINTENANCE_B_INIT) | |
1592 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
1593 | } | |
1594 | ||
1595 | /** | |
1596 | * abx500_chargalg_periodic_work() - Periodic work for the algorithm | |
1597 | * @work: pointer to the work_struct structure | |
1598 | * | |
1599 | * Work queue function for the charging algorithm | |
1600 | */ | |
1601 | static void abx500_chargalg_periodic_work(struct work_struct *work) | |
1602 | { | |
1603 | struct abx500_chargalg *di = container_of(work, | |
1604 | struct abx500_chargalg, chargalg_periodic_work.work); | |
1605 | ||
1606 | abx500_chargalg_algorithm(di); | |
1607 | ||
1608 | /* | |
1609 | * If a charger is connected then the battery has to be monitored | |
1610 | * frequently, else the work can be delayed. | |
1611 | */ | |
1612 | if (di->chg_info.conn_chg) | |
1613 | queue_delayed_work(di->chargalg_wq, | |
1614 | &di->chargalg_periodic_work, | |
b0284de0 | 1615 | di->bm->interval_charging * HZ); |
1668f811 AM |
1616 | else |
1617 | queue_delayed_work(di->chargalg_wq, | |
1618 | &di->chargalg_periodic_work, | |
b0284de0 | 1619 | di->bm->interval_not_charging * HZ); |
1668f811 AM |
1620 | } |
1621 | ||
1622 | /** | |
1623 | * abx500_chargalg_wd_work() - periodic work to kick the charger watchdog | |
1624 | * @work: pointer to the work_struct structure | |
1625 | * | |
1626 | * Work queue function for kicking the charger watchdog | |
1627 | */ | |
1628 | static void abx500_chargalg_wd_work(struct work_struct *work) | |
1629 | { | |
1630 | int ret; | |
1631 | struct abx500_chargalg *di = container_of(work, | |
1632 | struct abx500_chargalg, chargalg_wd_work.work); | |
1633 | ||
1634 | dev_dbg(di->dev, "abx500_chargalg_wd_work\n"); | |
1635 | ||
1636 | ret = abx500_chargalg_kick_watchdog(di); | |
1637 | if (ret < 0) | |
1638 | dev_err(di->dev, "failed to kick watchdog\n"); | |
1639 | ||
1640 | queue_delayed_work(di->chargalg_wq, | |
1641 | &di->chargalg_wd_work, CHG_WD_INTERVAL); | |
1642 | } | |
1643 | ||
1644 | /** | |
1645 | * abx500_chargalg_work() - Work to run the charging algorithm instantly | |
1646 | * @work: pointer to the work_struct structure | |
1647 | * | |
1648 | * Work queue function for calling the charging algorithm | |
1649 | */ | |
1650 | static void abx500_chargalg_work(struct work_struct *work) | |
1651 | { | |
1652 | struct abx500_chargalg *di = container_of(work, | |
1653 | struct abx500_chargalg, chargalg_work); | |
1654 | ||
1655 | abx500_chargalg_algorithm(di); | |
1656 | } | |
1657 | ||
1658 | /** | |
1659 | * abx500_chargalg_get_property() - get the chargalg properties | |
1660 | * @psy: pointer to the power_supply structure | |
1661 | * @psp: pointer to the power_supply_property structure | |
1662 | * @val: pointer to the power_supply_propval union | |
1663 | * | |
1664 | * This function gets called when an application tries to get the | |
1665 | * chargalg properties by reading the sysfs files. | |
1666 | * status: charging/discharging/full/unknown | |
1667 | * health: health of the battery | |
1668 | * Returns error code in case of failure else 0 on success | |
1669 | */ | |
1670 | static int abx500_chargalg_get_property(struct power_supply *psy, | |
1671 | enum power_supply_property psp, | |
1672 | union power_supply_propval *val) | |
1673 | { | |
1674 | struct abx500_chargalg *di; | |
1675 | ||
1676 | di = to_abx500_chargalg_device_info(psy); | |
1677 | ||
1678 | switch (psp) { | |
1679 | case POWER_SUPPLY_PROP_STATUS: | |
1680 | val->intval = di->charge_status; | |
1681 | break; | |
1682 | case POWER_SUPPLY_PROP_HEALTH: | |
1683 | if (di->events.batt_ovv) { | |
1684 | val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; | |
1685 | } else if (di->events.btemp_underover) { | |
b0284de0 | 1686 | if (di->batt_data.temp <= di->bm->temp_under) |
1668f811 AM |
1687 | val->intval = POWER_SUPPLY_HEALTH_COLD; |
1688 | else | |
1689 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
d80108fc LJ |
1690 | } else if (di->charge_state == STATE_SAFETY_TIMER_EXPIRED || |
1691 | di->charge_state == STATE_SAFETY_TIMER_EXPIRED_INIT) { | |
1692 | val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; | |
1668f811 AM |
1693 | } else { |
1694 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
1695 | } | |
1696 | break; | |
1697 | default: | |
1698 | return -EINVAL; | |
1699 | } | |
1700 | return 0; | |
1701 | } | |
1702 | ||
1703 | /* Exposure to the sysfs interface */ | |
1704 | ||
c9ade0fc LJ |
1705 | /** |
1706 | * abx500_chargalg_sysfs_show() - sysfs show operations | |
1707 | * @kobj: pointer to the struct kobject | |
1708 | * @attr: pointer to the struct attribute | |
1709 | * @buf: buffer that holds the parameter to send to userspace | |
1710 | * | |
1711 | * Returns a buffer to be displayed in user space | |
1712 | */ | |
1713 | static ssize_t abx500_chargalg_sysfs_show(struct kobject *kobj, | |
1714 | struct attribute *attr, char *buf) | |
1715 | { | |
1716 | struct abx500_chargalg *di = container_of(kobj, | |
1717 | struct abx500_chargalg, chargalg_kobject); | |
1718 | ||
1719 | return sprintf(buf, "%d\n", | |
1720 | di->susp_status.ac_suspended && | |
1721 | di->susp_status.usb_suspended); | |
1722 | } | |
1723 | ||
1668f811 AM |
1724 | /** |
1725 | * abx500_chargalg_sysfs_charger() - sysfs store operations | |
1726 | * @kobj: pointer to the struct kobject | |
1727 | * @attr: pointer to the struct attribute | |
1728 | * @buf: buffer that holds the parameter passed from userspace | |
1729 | * @length: length of the parameter passed | |
1730 | * | |
1731 | * Returns length of the buffer(input taken from user space) on success | |
1732 | * else error code on failure | |
1733 | * The operation to be performed on passing the parameters from the user space. | |
1734 | */ | |
1735 | static ssize_t abx500_chargalg_sysfs_charger(struct kobject *kobj, | |
1736 | struct attribute *attr, const char *buf, size_t length) | |
1737 | { | |
1738 | struct abx500_chargalg *di = container_of(kobj, | |
1739 | struct abx500_chargalg, chargalg_kobject); | |
1740 | long int param; | |
1741 | int ac_usb; | |
1742 | int ret; | |
1743 | char entry = *attr->name; | |
1744 | ||
1745 | switch (entry) { | |
1746 | case 'c': | |
1747 | ret = strict_strtol(buf, 10, ¶m); | |
1748 | if (ret < 0) | |
1749 | return ret; | |
1750 | ||
1751 | ac_usb = param; | |
1752 | switch (ac_usb) { | |
1753 | case 0: | |
1754 | /* Disable charging */ | |
1755 | di->susp_status.ac_suspended = true; | |
1756 | di->susp_status.usb_suspended = true; | |
1757 | di->susp_status.suspended_change = true; | |
1758 | /* Trigger a state change */ | |
1759 | queue_work(di->chargalg_wq, | |
1760 | &di->chargalg_work); | |
1761 | break; | |
1762 | case 1: | |
1763 | /* Enable AC Charging */ | |
1764 | di->susp_status.ac_suspended = false; | |
1765 | di->susp_status.suspended_change = true; | |
1766 | /* Trigger a state change */ | |
1767 | queue_work(di->chargalg_wq, | |
1768 | &di->chargalg_work); | |
1769 | break; | |
1770 | case 2: | |
1771 | /* Enable USB charging */ | |
1772 | di->susp_status.usb_suspended = false; | |
1773 | di->susp_status.suspended_change = true; | |
1774 | /* Trigger a state change */ | |
1775 | queue_work(di->chargalg_wq, | |
1776 | &di->chargalg_work); | |
1777 | break; | |
1778 | default: | |
1779 | dev_info(di->dev, "Wrong input\n" | |
1780 | "Enter 0. Disable AC/USB Charging\n" | |
1781 | "1. Enable AC charging\n" | |
1782 | "2. Enable USB Charging\n"); | |
1783 | }; | |
1784 | break; | |
1785 | }; | |
1786 | return strlen(buf); | |
1787 | } | |
1788 | ||
1789 | static struct attribute abx500_chargalg_en_charger = \ | |
1790 | { | |
1791 | .name = "chargalg", | |
c9ade0fc | 1792 | .mode = S_IRUGO | S_IWUSR, |
1668f811 AM |
1793 | }; |
1794 | ||
1795 | static struct attribute *abx500_chargalg_chg[] = { | |
1796 | &abx500_chargalg_en_charger, | |
1797 | NULL | |
1798 | }; | |
1799 | ||
64eb9b02 | 1800 | static const struct sysfs_ops abx500_chargalg_sysfs_ops = { |
c9ade0fc | 1801 | .show = abx500_chargalg_sysfs_show, |
1668f811 AM |
1802 | .store = abx500_chargalg_sysfs_charger, |
1803 | }; | |
1804 | ||
1805 | static struct kobj_type abx500_chargalg_ktype = { | |
1806 | .sysfs_ops = &abx500_chargalg_sysfs_ops, | |
1807 | .default_attrs = abx500_chargalg_chg, | |
1808 | }; | |
1809 | ||
1810 | /** | |
1811 | * abx500_chargalg_sysfs_exit() - de-init of sysfs entry | |
1812 | * @di: pointer to the struct abx500_chargalg | |
1813 | * | |
1814 | * This function removes the entry in sysfs. | |
1815 | */ | |
1816 | static void abx500_chargalg_sysfs_exit(struct abx500_chargalg *di) | |
1817 | { | |
1818 | kobject_del(&di->chargalg_kobject); | |
1819 | } | |
1820 | ||
1821 | /** | |
1822 | * abx500_chargalg_sysfs_init() - init of sysfs entry | |
1823 | * @di: pointer to the struct abx500_chargalg | |
1824 | * | |
1825 | * This function adds an entry in sysfs. | |
1826 | * Returns error code in case of failure else 0(on success) | |
1827 | */ | |
1828 | static int abx500_chargalg_sysfs_init(struct abx500_chargalg *di) | |
1829 | { | |
1830 | int ret = 0; | |
1831 | ||
1832 | ret = kobject_init_and_add(&di->chargalg_kobject, | |
1833 | &abx500_chargalg_ktype, | |
1834 | NULL, "abx500_chargalg"); | |
1835 | if (ret < 0) | |
1836 | dev_err(di->dev, "failed to create sysfs entry\n"); | |
1837 | ||
1838 | return ret; | |
1839 | } | |
1840 | /* Exposure to the sysfs interface <<END>> */ | |
1841 | ||
1842 | #if defined(CONFIG_PM) | |
1843 | static int abx500_chargalg_resume(struct platform_device *pdev) | |
1844 | { | |
1845 | struct abx500_chargalg *di = platform_get_drvdata(pdev); | |
1846 | ||
1847 | /* Kick charger watchdog if charging (any charger online) */ | |
1848 | if (di->chg_info.online_chg) | |
1849 | queue_delayed_work(di->chargalg_wq, &di->chargalg_wd_work, 0); | |
1850 | ||
1851 | /* | |
1852 | * Run the charging algorithm directly to be sure we don't | |
1853 | * do it too seldom | |
1854 | */ | |
1855 | queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0); | |
1856 | ||
1857 | return 0; | |
1858 | } | |
1859 | ||
1860 | static int abx500_chargalg_suspend(struct platform_device *pdev, | |
1861 | pm_message_t state) | |
1862 | { | |
1863 | struct abx500_chargalg *di = platform_get_drvdata(pdev); | |
1864 | ||
1865 | if (di->chg_info.online_chg) | |
1866 | cancel_delayed_work_sync(&di->chargalg_wd_work); | |
1867 | ||
1868 | cancel_delayed_work_sync(&di->chargalg_periodic_work); | |
1869 | ||
1870 | return 0; | |
1871 | } | |
1872 | #else | |
1873 | #define abx500_chargalg_suspend NULL | |
1874 | #define abx500_chargalg_resume NULL | |
1875 | #endif | |
1876 | ||
415ec69f | 1877 | static int abx500_chargalg_remove(struct platform_device *pdev) |
1668f811 AM |
1878 | { |
1879 | struct abx500_chargalg *di = platform_get_drvdata(pdev); | |
1880 | ||
1881 | /* sysfs interface to enable/disbale charging from user space */ | |
1882 | abx500_chargalg_sysfs_exit(di); | |
1883 | ||
1884 | /* Delete the work queue */ | |
1885 | destroy_workqueue(di->chargalg_wq); | |
1886 | ||
1887 | flush_scheduled_work(); | |
1888 | power_supply_unregister(&di->chargalg_psy); | |
1889 | platform_set_drvdata(pdev, NULL); | |
1668f811 AM |
1890 | |
1891 | return 0; | |
1892 | } | |
1893 | ||
a12810ab R |
1894 | static char *supply_interface[] = { |
1895 | "ab8500_fg", | |
1896 | }; | |
1897 | ||
c8afa640 | 1898 | static int abx500_chargalg_probe(struct platform_device *pdev) |
1668f811 | 1899 | { |
a12810ab | 1900 | struct device_node *np = pdev->dev.of_node; |
bdc56b44 | 1901 | struct abx500_bm_data *plat = pdev->dev.platform_data; |
a12810ab | 1902 | struct abx500_chargalg *di; |
1668f811 AM |
1903 | int ret = 0; |
1904 | ||
a12810ab R |
1905 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
1906 | if (!di) { | |
1907 | dev_err(&pdev->dev, "%s no mem for ab8500_chargalg\n", __func__); | |
1668f811 | 1908 | return -ENOMEM; |
a12810ab | 1909 | } |
bdc56b44 LJ |
1910 | |
1911 | if (!plat) { | |
1912 | dev_err(&pdev->dev, "no battery management data supplied\n"); | |
1913 | return -EINVAL; | |
1914 | } | |
1915 | di->bm = plat; | |
1916 | ||
1917 | if (np) { | |
1918 | ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm); | |
1919 | if (ret) { | |
1920 | dev_err(&pdev->dev, "failed to get battery information\n"); | |
1921 | return ret; | |
a12810ab | 1922 | } |
a12810ab | 1923 | } |
1668f811 | 1924 | |
330b7ebf | 1925 | /* get device struct and parent */ |
1668f811 | 1926 | di->dev = &pdev->dev; |
330b7ebf | 1927 | di->parent = dev_get_drvdata(pdev->dev.parent); |
1668f811 AM |
1928 | |
1929 | /* chargalg supply */ | |
1930 | di->chargalg_psy.name = "abx500_chargalg"; | |
1931 | di->chargalg_psy.type = POWER_SUPPLY_TYPE_BATTERY; | |
1932 | di->chargalg_psy.properties = abx500_chargalg_props; | |
1933 | di->chargalg_psy.num_properties = ARRAY_SIZE(abx500_chargalg_props); | |
1934 | di->chargalg_psy.get_property = abx500_chargalg_get_property; | |
a12810ab R |
1935 | di->chargalg_psy.supplied_to = supply_interface; |
1936 | di->chargalg_psy.num_supplicants = ARRAY_SIZE(supply_interface), | |
1668f811 AM |
1937 | di->chargalg_psy.external_power_changed = |
1938 | abx500_chargalg_external_power_changed; | |
1939 | ||
1940 | /* Initilialize safety timer */ | |
1941 | init_timer(&di->safety_timer); | |
1942 | di->safety_timer.function = abx500_chargalg_safety_timer_expired; | |
1943 | di->safety_timer.data = (unsigned long) di; | |
1944 | ||
1945 | /* Initilialize maintenance timer */ | |
1946 | init_timer(&di->maintenance_timer); | |
1947 | di->maintenance_timer.function = | |
1948 | abx500_chargalg_maintenance_timer_expired; | |
1949 | di->maintenance_timer.data = (unsigned long) di; | |
1950 | ||
1951 | /* Create a work queue for the chargalg */ | |
1952 | di->chargalg_wq = | |
1953 | create_singlethread_workqueue("abx500_chargalg_wq"); | |
1954 | if (di->chargalg_wq == NULL) { | |
1955 | dev_err(di->dev, "failed to create work queue\n"); | |
a12810ab | 1956 | return -ENOMEM; |
1668f811 AM |
1957 | } |
1958 | ||
1959 | /* Init work for chargalg */ | |
203b42f7 | 1960 | INIT_DEFERRABLE_WORK(&di->chargalg_periodic_work, |
1668f811 | 1961 | abx500_chargalg_periodic_work); |
203b42f7 | 1962 | INIT_DEFERRABLE_WORK(&di->chargalg_wd_work, |
1668f811 AM |
1963 | abx500_chargalg_wd_work); |
1964 | ||
1965 | /* Init work for chargalg */ | |
1966 | INIT_WORK(&di->chargalg_work, abx500_chargalg_work); | |
1967 | ||
1968 | /* To detect charger at startup */ | |
1969 | di->chg_info.prev_conn_chg = -1; | |
1970 | ||
1971 | /* Register chargalg power supply class */ | |
1972 | ret = power_supply_register(di->dev, &di->chargalg_psy); | |
1973 | if (ret) { | |
1974 | dev_err(di->dev, "failed to register chargalg psy\n"); | |
1975 | goto free_chargalg_wq; | |
1976 | } | |
1977 | ||
1978 | platform_set_drvdata(pdev, di); | |
1979 | ||
1980 | /* sysfs interface to enable/disable charging from user space */ | |
1981 | ret = abx500_chargalg_sysfs_init(di); | |
1982 | if (ret) { | |
1983 | dev_err(di->dev, "failed to create sysfs entry\n"); | |
1984 | goto free_psy; | |
1985 | } | |
1986 | ||
1987 | /* Run the charging algorithm */ | |
1988 | queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0); | |
1989 | ||
1990 | dev_info(di->dev, "probe success\n"); | |
1991 | return ret; | |
1992 | ||
1993 | free_psy: | |
1994 | power_supply_unregister(&di->chargalg_psy); | |
1995 | free_chargalg_wq: | |
1996 | destroy_workqueue(di->chargalg_wq); | |
1668f811 AM |
1997 | return ret; |
1998 | } | |
1999 | ||
a12810ab R |
2000 | static const struct of_device_id ab8500_chargalg_match[] = { |
2001 | { .compatible = "stericsson,ab8500-chargalg", }, | |
2002 | { }, | |
2003 | }; | |
2004 | ||
1668f811 AM |
2005 | static struct platform_driver abx500_chargalg_driver = { |
2006 | .probe = abx500_chargalg_probe, | |
28ea73f4 | 2007 | .remove = abx500_chargalg_remove, |
1668f811 AM |
2008 | .suspend = abx500_chargalg_suspend, |
2009 | .resume = abx500_chargalg_resume, | |
2010 | .driver = { | |
a12810ab | 2011 | .name = "ab8500-chargalg", |
1668f811 | 2012 | .owner = THIS_MODULE, |
a12810ab | 2013 | .of_match_table = ab8500_chargalg_match, |
1668f811 AM |
2014 | }, |
2015 | }; | |
2016 | ||
2017 | static int __init abx500_chargalg_init(void) | |
2018 | { | |
2019 | return platform_driver_register(&abx500_chargalg_driver); | |
2020 | } | |
2021 | ||
2022 | static void __exit abx500_chargalg_exit(void) | |
2023 | { | |
2024 | platform_driver_unregister(&abx500_chargalg_driver); | |
2025 | } | |
2026 | ||
2027 | module_init(abx500_chargalg_init); | |
2028 | module_exit(abx500_chargalg_exit); | |
2029 | ||
2030 | MODULE_LICENSE("GPL v2"); | |
2031 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski"); | |
2032 | MODULE_ALIAS("platform:abx500-chargalg"); | |
2033 | MODULE_DESCRIPTION("abx500 battery charging algorithm"); |