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1668f811 AM |
1 | /* |
2 | * Copyright (C) ST-Ericsson SA 2012 | |
257107ae | 3 | * Copyright (c) 2012 Sony Mobile Communications AB |
1668f811 AM |
4 | * |
5 | * Charging algorithm driver for abx500 variants | |
6 | * | |
7 | * License Terms: GNU General Public License v2 | |
8 | * Authors: | |
9 | * Johan Palsson <johan.palsson@stericsson.com> | |
10 | * Karl Komierowski <karl.komierowski@stericsson.com> | |
11 | * Arun R Murthy <arun.murthy@stericsson.com> | |
257107ae | 12 | * Author: Imre Sunyi <imre.sunyi@sonymobile.com> |
1668f811 AM |
13 | */ |
14 | ||
15 | #include <linux/init.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/device.h> | |
257107ae | 18 | #include <linux/hrtimer.h> |
1668f811 AM |
19 | #include <linux/interrupt.h> |
20 | #include <linux/delay.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/power_supply.h> | |
24 | #include <linux/completion.h> | |
25 | #include <linux/workqueue.h> | |
26 | #include <linux/kobject.h> | |
a12810ab R |
27 | #include <linux/of.h> |
28 | #include <linux/mfd/core.h> | |
1668f811 | 29 | #include <linux/mfd/abx500.h> |
257107ae | 30 | #include <linux/mfd/abx500/ab8500.h> |
1668f811 AM |
31 | #include <linux/mfd/abx500/ux500_chargalg.h> |
32 | #include <linux/mfd/abx500/ab8500-bm.h> | |
8891716e | 33 | #include <linux/notifier.h> |
1668f811 AM |
34 | |
35 | /* Watchdog kick interval */ | |
36 | #define CHG_WD_INTERVAL (6 * HZ) | |
37 | ||
38 | /* End-of-charge criteria counter */ | |
39 | #define EOC_COND_CNT 10 | |
40 | ||
257107ae LJ |
41 | /* One hour expressed in seconds */ |
42 | #define ONE_HOUR_IN_SECONDS 3600 | |
43 | ||
44 | /* Five minutes expressed in seconds */ | |
45 | #define FIVE_MINUTES_IN_SECONDS 300 | |
46 | ||
db43e6c4 LJ |
47 | /* Plus margin for the low battery threshold */ |
48 | #define BAT_PLUS_MARGIN (100) | |
49 | ||
4d3b4aa5 LJ |
50 | #define CHARGALG_CURR_STEP_LOW 0 |
51 | #define CHARGALG_CURR_STEP_HIGH 100 | |
52 | ||
1668f811 AM |
53 | enum abx500_chargers { |
54 | NO_CHG, | |
55 | AC_CHG, | |
56 | USB_CHG, | |
57 | }; | |
58 | ||
59 | struct abx500_chargalg_charger_info { | |
60 | enum abx500_chargers conn_chg; | |
61 | enum abx500_chargers prev_conn_chg; | |
62 | enum abx500_chargers online_chg; | |
63 | enum abx500_chargers prev_online_chg; | |
64 | enum abx500_chargers charger_type; | |
65 | bool usb_chg_ok; | |
66 | bool ac_chg_ok; | |
67 | int usb_volt; | |
68 | int usb_curr; | |
69 | int ac_volt; | |
70 | int ac_curr; | |
71 | int usb_vset; | |
72 | int usb_iset; | |
73 | int ac_vset; | |
74 | int ac_iset; | |
75 | }; | |
76 | ||
77 | struct abx500_chargalg_suspension_status { | |
78 | bool suspended_change; | |
79 | bool ac_suspended; | |
80 | bool usb_suspended; | |
81 | }; | |
82 | ||
4d3b4aa5 LJ |
83 | struct abx500_chargalg_current_step_status { |
84 | bool curr_step_change; | |
85 | int curr_step; | |
86 | }; | |
87 | ||
1668f811 AM |
88 | struct abx500_chargalg_battery_data { |
89 | int temp; | |
90 | int volt; | |
91 | int avg_curr; | |
92 | int inst_curr; | |
93 | int percent; | |
94 | }; | |
95 | ||
96 | enum abx500_chargalg_states { | |
97 | STATE_HANDHELD_INIT, | |
98 | STATE_HANDHELD, | |
99 | STATE_CHG_NOT_OK_INIT, | |
100 | STATE_CHG_NOT_OK, | |
101 | STATE_HW_TEMP_PROTECT_INIT, | |
102 | STATE_HW_TEMP_PROTECT, | |
103 | STATE_NORMAL_INIT, | |
db43e6c4 | 104 | STATE_USB_PP_PRE_CHARGE, |
1668f811 AM |
105 | STATE_NORMAL, |
106 | STATE_WAIT_FOR_RECHARGE_INIT, | |
107 | STATE_WAIT_FOR_RECHARGE, | |
108 | STATE_MAINTENANCE_A_INIT, | |
109 | STATE_MAINTENANCE_A, | |
110 | STATE_MAINTENANCE_B_INIT, | |
111 | STATE_MAINTENANCE_B, | |
112 | STATE_TEMP_UNDEROVER_INIT, | |
113 | STATE_TEMP_UNDEROVER, | |
114 | STATE_TEMP_LOWHIGH_INIT, | |
115 | STATE_TEMP_LOWHIGH, | |
116 | STATE_SUSPENDED_INIT, | |
117 | STATE_SUSPENDED, | |
118 | STATE_OVV_PROTECT_INIT, | |
119 | STATE_OVV_PROTECT, | |
120 | STATE_SAFETY_TIMER_EXPIRED_INIT, | |
121 | STATE_SAFETY_TIMER_EXPIRED, | |
122 | STATE_BATT_REMOVED_INIT, | |
123 | STATE_BATT_REMOVED, | |
124 | STATE_WD_EXPIRED_INIT, | |
125 | STATE_WD_EXPIRED, | |
126 | }; | |
127 | ||
128 | static const char *states[] = { | |
129 | "HANDHELD_INIT", | |
130 | "HANDHELD", | |
131 | "CHG_NOT_OK_INIT", | |
132 | "CHG_NOT_OK", | |
133 | "HW_TEMP_PROTECT_INIT", | |
134 | "HW_TEMP_PROTECT", | |
135 | "NORMAL_INIT", | |
db43e6c4 | 136 | "USB_PP_PRE_CHARGE", |
1668f811 AM |
137 | "NORMAL", |
138 | "WAIT_FOR_RECHARGE_INIT", | |
139 | "WAIT_FOR_RECHARGE", | |
140 | "MAINTENANCE_A_INIT", | |
141 | "MAINTENANCE_A", | |
142 | "MAINTENANCE_B_INIT", | |
143 | "MAINTENANCE_B", | |
144 | "TEMP_UNDEROVER_INIT", | |
145 | "TEMP_UNDEROVER", | |
146 | "TEMP_LOWHIGH_INIT", | |
147 | "TEMP_LOWHIGH", | |
148 | "SUSPENDED_INIT", | |
149 | "SUSPENDED", | |
150 | "OVV_PROTECT_INIT", | |
151 | "OVV_PROTECT", | |
152 | "SAFETY_TIMER_EXPIRED_INIT", | |
153 | "SAFETY_TIMER_EXPIRED", | |
154 | "BATT_REMOVED_INIT", | |
155 | "BATT_REMOVED", | |
156 | "WD_EXPIRED_INIT", | |
157 | "WD_EXPIRED", | |
158 | }; | |
159 | ||
160 | struct abx500_chargalg_events { | |
161 | bool batt_unknown; | |
162 | bool mainextchnotok; | |
163 | bool batt_ovv; | |
164 | bool batt_rem; | |
165 | bool btemp_underover; | |
166 | bool btemp_lowhigh; | |
167 | bool main_thermal_prot; | |
168 | bool usb_thermal_prot; | |
169 | bool main_ovv; | |
170 | bool vbus_ovv; | |
171 | bool usbchargernotok; | |
172 | bool safety_timer_expired; | |
173 | bool maintenance_timer_expired; | |
174 | bool ac_wd_expired; | |
175 | bool usb_wd_expired; | |
176 | bool ac_cv_active; | |
177 | bool usb_cv_active; | |
178 | bool vbus_collapsed; | |
179 | }; | |
180 | ||
181 | /** | |
182 | * struct abx500_charge_curr_maximization - Charger maximization parameters | |
183 | * @original_iset: the non optimized/maximised charger current | |
184 | * @current_iset: the charging current used at this moment | |
185 | * @test_delta_i: the delta between the current we want to charge and the | |
186 | current that is really going into the battery | |
187 | * @condition_cnt: number of iterations needed before a new charger current | |
188 | is set | |
189 | * @max_current: maximum charger current | |
190 | * @wait_cnt: to avoid too fast current step down in case of charger | |
191 | * voltage collapse, we insert this delay between step | |
192 | * down | |
193 | * @level: tells in how many steps the charging current has been | |
194 | increased | |
195 | */ | |
196 | struct abx500_charge_curr_maximization { | |
197 | int original_iset; | |
198 | int current_iset; | |
199 | int test_delta_i; | |
200 | int condition_cnt; | |
201 | int max_current; | |
202 | int wait_cnt; | |
203 | u8 level; | |
204 | }; | |
205 | ||
206 | enum maxim_ret { | |
207 | MAXIM_RET_NOACTION, | |
208 | MAXIM_RET_CHANGE, | |
209 | MAXIM_RET_IBAT_TOO_HIGH, | |
210 | }; | |
211 | ||
212 | /** | |
213 | * struct abx500_chargalg - abx500 Charging algorithm device information | |
214 | * @dev: pointer to the structure device | |
215 | * @charge_status: battery operating status | |
216 | * @eoc_cnt: counter used to determine end-of_charge | |
1668f811 AM |
217 | * @maintenance_chg: indicate if maintenance charge is active |
218 | * @t_hyst_norm temperature hysteresis when the temperature has been | |
219 | * over or under normal limits | |
220 | * @t_hyst_lowhigh temperature hysteresis when the temperature has been | |
221 | * over or under the high or low limits | |
222 | * @charge_state: current state of the charging algorithm | |
223 | * @ccm charging current maximization parameters | |
224 | * @chg_info: information about connected charger types | |
225 | * @batt_data: data of the battery | |
226 | * @susp_status: current charger suspension status | |
b0284de0 | 227 | * @bm: Platform specific battery management information |
4d3b4aa5 | 228 | * @curr_status: Current step status for over-current protection |
330b7ebf | 229 | * @parent: pointer to the struct abx500 |
1668f811 AM |
230 | * @chargalg_psy: structure that holds the battery properties exposed by |
231 | * the charging algorithm | |
232 | * @events: structure for information about events triggered | |
233 | * @chargalg_wq: work queue for running the charging algorithm | |
234 | * @chargalg_periodic_work: work to run the charging algorithm periodically | |
235 | * @chargalg_wd_work: work to kick the charger watchdog periodically | |
236 | * @chargalg_work: work to run the charging algorithm instantly | |
237 | * @safety_timer: charging safety timer | |
238 | * @maintenance_timer: maintenance charging timer | |
239 | * @chargalg_kobject: structure of type kobject | |
240 | */ | |
241 | struct abx500_chargalg { | |
242 | struct device *dev; | |
243 | int charge_status; | |
244 | int eoc_cnt; | |
1668f811 AM |
245 | bool maintenance_chg; |
246 | int t_hyst_norm; | |
247 | int t_hyst_lowhigh; | |
248 | enum abx500_chargalg_states charge_state; | |
249 | struct abx500_charge_curr_maximization ccm; | |
250 | struct abx500_chargalg_charger_info chg_info; | |
251 | struct abx500_chargalg_battery_data batt_data; | |
252 | struct abx500_chargalg_suspension_status susp_status; | |
330b7ebf | 253 | struct ab8500 *parent; |
4d3b4aa5 | 254 | struct abx500_chargalg_current_step_status curr_status; |
b0284de0 | 255 | struct abx500_bm_data *bm; |
297d716f | 256 | struct power_supply *chargalg_psy; |
1668f811 AM |
257 | struct ux500_charger *ac_chg; |
258 | struct ux500_charger *usb_chg; | |
259 | struct abx500_chargalg_events events; | |
260 | struct workqueue_struct *chargalg_wq; | |
261 | struct delayed_work chargalg_periodic_work; | |
262 | struct delayed_work chargalg_wd_work; | |
263 | struct work_struct chargalg_work; | |
257107ae LJ |
264 | struct hrtimer safety_timer; |
265 | struct hrtimer maintenance_timer; | |
1668f811 AM |
266 | struct kobject chargalg_kobject; |
267 | }; | |
268 | ||
8891716e LJ |
269 | /*External charger prepare notifier*/ |
270 | BLOCKING_NOTIFIER_HEAD(charger_notifier_list); | |
271 | ||
1668f811 AM |
272 | /* Main battery properties */ |
273 | static enum power_supply_property abx500_chargalg_props[] = { | |
274 | POWER_SUPPLY_PROP_STATUS, | |
275 | POWER_SUPPLY_PROP_HEALTH, | |
276 | }; | |
277 | ||
4d3b4aa5 LJ |
278 | struct abx500_chargalg_sysfs_entry { |
279 | struct attribute attr; | |
280 | ssize_t (*show)(struct abx500_chargalg *, char *); | |
281 | ssize_t (*store)(struct abx500_chargalg *, const char *, size_t); | |
282 | }; | |
283 | ||
1668f811 AM |
284 | /** |
285 | * abx500_chargalg_safety_timer_expired() - Expiration of the safety timer | |
257107ae | 286 | * @timer: pointer to the hrtimer structure |
1668f811 AM |
287 | * |
288 | * This function gets called when the safety timer for the charger | |
289 | * expires | |
290 | */ | |
257107ae LJ |
291 | static enum hrtimer_restart |
292 | abx500_chargalg_safety_timer_expired(struct hrtimer *timer) | |
1668f811 | 293 | { |
257107ae LJ |
294 | struct abx500_chargalg *di = container_of(timer, struct abx500_chargalg, |
295 | safety_timer); | |
1668f811 AM |
296 | dev_err(di->dev, "Safety timer expired\n"); |
297 | di->events.safety_timer_expired = true; | |
298 | ||
299 | /* Trigger execution of the algorithm instantly */ | |
300 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
257107ae LJ |
301 | |
302 | return HRTIMER_NORESTART; | |
1668f811 AM |
303 | } |
304 | ||
305 | /** | |
306 | * abx500_chargalg_maintenance_timer_expired() - Expiration of | |
307 | * the maintenance timer | |
257107ae | 308 | * @timer: pointer to the timer structure |
1668f811 AM |
309 | * |
310 | * This function gets called when the maintenence timer | |
311 | * expires | |
312 | */ | |
257107ae LJ |
313 | static enum hrtimer_restart |
314 | abx500_chargalg_maintenance_timer_expired(struct hrtimer *timer) | |
1668f811 AM |
315 | { |
316 | ||
257107ae LJ |
317 | struct abx500_chargalg *di = container_of(timer, struct abx500_chargalg, |
318 | maintenance_timer); | |
319 | ||
1668f811 AM |
320 | dev_dbg(di->dev, "Maintenance timer expired\n"); |
321 | di->events.maintenance_timer_expired = true; | |
322 | ||
323 | /* Trigger execution of the algorithm instantly */ | |
324 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
257107ae LJ |
325 | |
326 | return HRTIMER_NORESTART; | |
1668f811 AM |
327 | } |
328 | ||
329 | /** | |
330 | * abx500_chargalg_state_to() - Change charge state | |
331 | * @di: pointer to the abx500_chargalg structure | |
332 | * | |
333 | * This function gets called when a charge state change should occur | |
334 | */ | |
335 | static void abx500_chargalg_state_to(struct abx500_chargalg *di, | |
336 | enum abx500_chargalg_states state) | |
337 | { | |
338 | dev_dbg(di->dev, | |
339 | "State changed: %s (From state: [%d] %s =to=> [%d] %s )\n", | |
340 | di->charge_state == state ? "NO" : "YES", | |
341 | di->charge_state, | |
342 | states[di->charge_state], | |
343 | state, | |
344 | states[state]); | |
345 | ||
346 | di->charge_state = state; | |
347 | } | |
348 | ||
4dcdf577 LJ |
349 | static int abx500_chargalg_check_charger_enable(struct abx500_chargalg *di) |
350 | { | |
351 | switch (di->charge_state) { | |
352 | case STATE_NORMAL: | |
353 | case STATE_MAINTENANCE_A: | |
354 | case STATE_MAINTENANCE_B: | |
355 | break; | |
356 | default: | |
357 | return 0; | |
358 | } | |
359 | ||
360 | if (di->chg_info.charger_type & USB_CHG) { | |
361 | return di->usb_chg->ops.check_enable(di->usb_chg, | |
362 | di->bm->bat_type[di->bm->batt_id].normal_vol_lvl, | |
363 | di->bm->bat_type[di->bm->batt_id].normal_cur_lvl); | |
364 | } else if ((di->chg_info.charger_type & AC_CHG) && | |
365 | !(di->ac_chg->external)) { | |
366 | return di->ac_chg->ops.check_enable(di->ac_chg, | |
367 | di->bm->bat_type[di->bm->batt_id].normal_vol_lvl, | |
368 | di->bm->bat_type[di->bm->batt_id].normal_cur_lvl); | |
369 | } | |
370 | return 0; | |
371 | } | |
372 | ||
1668f811 AM |
373 | /** |
374 | * abx500_chargalg_check_charger_connection() - Check charger connection change | |
375 | * @di: pointer to the abx500_chargalg structure | |
376 | * | |
377 | * This function will check if there is a change in the charger connection | |
378 | * and change charge state accordingly. AC has precedence over USB. | |
379 | */ | |
380 | static int abx500_chargalg_check_charger_connection(struct abx500_chargalg *di) | |
381 | { | |
382 | if (di->chg_info.conn_chg != di->chg_info.prev_conn_chg || | |
383 | di->susp_status.suspended_change) { | |
384 | /* | |
385 | * Charger state changed or suspension | |
386 | * has changed since last update | |
387 | */ | |
388 | if ((di->chg_info.conn_chg & AC_CHG) && | |
389 | !di->susp_status.ac_suspended) { | |
390 | dev_dbg(di->dev, "Charging source is AC\n"); | |
391 | if (di->chg_info.charger_type != AC_CHG) { | |
392 | di->chg_info.charger_type = AC_CHG; | |
393 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
394 | } | |
395 | } else if ((di->chg_info.conn_chg & USB_CHG) && | |
396 | !di->susp_status.usb_suspended) { | |
397 | dev_dbg(di->dev, "Charging source is USB\n"); | |
398 | di->chg_info.charger_type = USB_CHG; | |
399 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
400 | } else if (di->chg_info.conn_chg && | |
401 | (di->susp_status.ac_suspended || | |
402 | di->susp_status.usb_suspended)) { | |
403 | dev_dbg(di->dev, "Charging is suspended\n"); | |
404 | di->chg_info.charger_type = NO_CHG; | |
405 | abx500_chargalg_state_to(di, STATE_SUSPENDED_INIT); | |
406 | } else { | |
407 | dev_dbg(di->dev, "Charging source is OFF\n"); | |
408 | di->chg_info.charger_type = NO_CHG; | |
409 | abx500_chargalg_state_to(di, STATE_HANDHELD_INIT); | |
410 | } | |
411 | di->chg_info.prev_conn_chg = di->chg_info.conn_chg; | |
412 | di->susp_status.suspended_change = false; | |
413 | } | |
414 | return di->chg_info.conn_chg; | |
415 | } | |
416 | ||
4d3b4aa5 LJ |
417 | /** |
418 | * abx500_chargalg_check_current_step_status() - Check charging current | |
419 | * step status. | |
420 | * @di: pointer to the abx500_chargalg structure | |
421 | * | |
422 | * This function will check if there is a change in the charging current step | |
423 | * and change charge state accordingly. | |
424 | */ | |
425 | static void abx500_chargalg_check_current_step_status | |
426 | (struct abx500_chargalg *di) | |
427 | { | |
428 | if (di->curr_status.curr_step_change) | |
429 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
430 | di->curr_status.curr_step_change = false; | |
431 | } | |
432 | ||
1668f811 AM |
433 | /** |
434 | * abx500_chargalg_start_safety_timer() - Start charging safety timer | |
435 | * @di: pointer to the abx500_chargalg structure | |
436 | * | |
437 | * The safety timer is used to avoid overcharging of old or bad batteries. | |
438 | * There are different timers for AC and USB | |
439 | */ | |
440 | static void abx500_chargalg_start_safety_timer(struct abx500_chargalg *di) | |
441 | { | |
257107ae LJ |
442 | /* Charger-dependent expiration time in hours*/ |
443 | int timer_expiration = 0; | |
1668f811 AM |
444 | |
445 | switch (di->chg_info.charger_type) { | |
446 | case AC_CHG: | |
257107ae | 447 | timer_expiration = di->bm->main_safety_tmr_h; |
1668f811 AM |
448 | break; |
449 | ||
450 | case USB_CHG: | |
257107ae | 451 | timer_expiration = di->bm->usb_safety_tmr_h; |
1668f811 AM |
452 | break; |
453 | ||
454 | default: | |
455 | dev_err(di->dev, "Unknown charger to charge from\n"); | |
456 | break; | |
457 | } | |
458 | ||
459 | di->events.safety_timer_expired = false; | |
257107ae LJ |
460 | hrtimer_set_expires_range(&di->safety_timer, |
461 | ktime_set(timer_expiration * ONE_HOUR_IN_SECONDS, 0), | |
462 | ktime_set(FIVE_MINUTES_IN_SECONDS, 0)); | |
463 | hrtimer_start_expires(&di->safety_timer, HRTIMER_MODE_REL); | |
1668f811 AM |
464 | } |
465 | ||
466 | /** | |
467 | * abx500_chargalg_stop_safety_timer() - Stop charging safety timer | |
468 | * @di: pointer to the abx500_chargalg structure | |
469 | * | |
470 | * The safety timer is stopped whenever the NORMAL state is exited | |
471 | */ | |
472 | static void abx500_chargalg_stop_safety_timer(struct abx500_chargalg *di) | |
473 | { | |
257107ae LJ |
474 | if (hrtimer_try_to_cancel(&di->safety_timer) >= 0) |
475 | di->events.safety_timer_expired = false; | |
1668f811 AM |
476 | } |
477 | ||
478 | /** | |
479 | * abx500_chargalg_start_maintenance_timer() - Start charging maintenance timer | |
480 | * @di: pointer to the abx500_chargalg structure | |
481 | * @duration: duration of ther maintenance timer in hours | |
482 | * | |
483 | * The maintenance timer is used to maintain the charge in the battery once | |
484 | * the battery is considered full. These timers are chosen to match the | |
485 | * discharge curve of the battery | |
486 | */ | |
487 | static void abx500_chargalg_start_maintenance_timer(struct abx500_chargalg *di, | |
488 | int duration) | |
489 | { | |
257107ae LJ |
490 | hrtimer_set_expires_range(&di->maintenance_timer, |
491 | ktime_set(duration * ONE_HOUR_IN_SECONDS, 0), | |
492 | ktime_set(FIVE_MINUTES_IN_SECONDS, 0)); | |
1668f811 | 493 | di->events.maintenance_timer_expired = false; |
257107ae | 494 | hrtimer_start_expires(&di->maintenance_timer, HRTIMER_MODE_REL); |
1668f811 AM |
495 | } |
496 | ||
497 | /** | |
498 | * abx500_chargalg_stop_maintenance_timer() - Stop maintenance timer | |
499 | * @di: pointer to the abx500_chargalg structure | |
500 | * | |
501 | * The maintenance timer is stopped whenever maintenance ends or when another | |
502 | * state is entered | |
503 | */ | |
504 | static void abx500_chargalg_stop_maintenance_timer(struct abx500_chargalg *di) | |
505 | { | |
257107ae LJ |
506 | if (hrtimer_try_to_cancel(&di->maintenance_timer) >= 0) |
507 | di->events.maintenance_timer_expired = false; | |
1668f811 AM |
508 | } |
509 | ||
510 | /** | |
511 | * abx500_chargalg_kick_watchdog() - Kick charger watchdog | |
512 | * @di: pointer to the abx500_chargalg structure | |
513 | * | |
514 | * The charger watchdog have to be kicked periodically whenever the charger is | |
515 | * on, else the ABB will reset the system | |
516 | */ | |
517 | static int abx500_chargalg_kick_watchdog(struct abx500_chargalg *di) | |
518 | { | |
519 | /* Check if charger exists and kick watchdog if charging */ | |
520 | if (di->ac_chg && di->ac_chg->ops.kick_wd && | |
e07a5645 LP |
521 | di->chg_info.online_chg & AC_CHG) { |
522 | /* | |
523 | * If AB charger watchdog expired, pm2xxx charging | |
524 | * gets disabled. To be safe, kick both AB charger watchdog | |
525 | * and pm2xxx watchdog. | |
526 | */ | |
527 | if (di->ac_chg->external && | |
528 | di->usb_chg && di->usb_chg->ops.kick_wd) | |
529 | di->usb_chg->ops.kick_wd(di->usb_chg); | |
530 | ||
1668f811 | 531 | return di->ac_chg->ops.kick_wd(di->ac_chg); |
e07a5645 | 532 | } |
1668f811 AM |
533 | else if (di->usb_chg && di->usb_chg->ops.kick_wd && |
534 | di->chg_info.online_chg & USB_CHG) | |
535 | return di->usb_chg->ops.kick_wd(di->usb_chg); | |
536 | ||
537 | return -ENXIO; | |
538 | } | |
539 | ||
540 | /** | |
541 | * abx500_chargalg_ac_en() - Turn on/off the AC charger | |
542 | * @di: pointer to the abx500_chargalg structure | |
543 | * @enable: charger on/off | |
544 | * @vset: requested charger output voltage | |
545 | * @iset: requested charger output current | |
546 | * | |
547 | * The AC charger will be turned on/off with the requested charge voltage and | |
548 | * current | |
549 | */ | |
550 | static int abx500_chargalg_ac_en(struct abx500_chargalg *di, int enable, | |
551 | int vset, int iset) | |
552 | { | |
8891716e LJ |
553 | static int abx500_chargalg_ex_ac_enable_toggle; |
554 | ||
1668f811 AM |
555 | if (!di->ac_chg || !di->ac_chg->ops.enable) |
556 | return -ENXIO; | |
557 | ||
558 | /* Select maximum of what both the charger and the battery supports */ | |
559 | if (di->ac_chg->max_out_volt) | |
560 | vset = min(vset, di->ac_chg->max_out_volt); | |
561 | if (di->ac_chg->max_out_curr) | |
562 | iset = min(iset, di->ac_chg->max_out_curr); | |
563 | ||
564 | di->chg_info.ac_iset = iset; | |
565 | di->chg_info.ac_vset = vset; | |
566 | ||
8891716e LJ |
567 | /* Enable external charger */ |
568 | if (enable && di->ac_chg->external && | |
569 | !abx500_chargalg_ex_ac_enable_toggle) { | |
570 | blocking_notifier_call_chain(&charger_notifier_list, | |
571 | 0, di->dev); | |
572 | abx500_chargalg_ex_ac_enable_toggle++; | |
573 | } | |
574 | ||
1668f811 AM |
575 | return di->ac_chg->ops.enable(di->ac_chg, enable, vset, iset); |
576 | } | |
577 | ||
578 | /** | |
579 | * abx500_chargalg_usb_en() - Turn on/off the USB charger | |
580 | * @di: pointer to the abx500_chargalg structure | |
581 | * @enable: charger on/off | |
582 | * @vset: requested charger output voltage | |
583 | * @iset: requested charger output current | |
584 | * | |
585 | * The USB charger will be turned on/off with the requested charge voltage and | |
586 | * current | |
587 | */ | |
588 | static int abx500_chargalg_usb_en(struct abx500_chargalg *di, int enable, | |
589 | int vset, int iset) | |
590 | { | |
591 | if (!di->usb_chg || !di->usb_chg->ops.enable) | |
592 | return -ENXIO; | |
593 | ||
594 | /* Select maximum of what both the charger and the battery supports */ | |
595 | if (di->usb_chg->max_out_volt) | |
596 | vset = min(vset, di->usb_chg->max_out_volt); | |
597 | if (di->usb_chg->max_out_curr) | |
598 | iset = min(iset, di->usb_chg->max_out_curr); | |
599 | ||
600 | di->chg_info.usb_iset = iset; | |
601 | di->chg_info.usb_vset = vset; | |
602 | ||
603 | return di->usb_chg->ops.enable(di->usb_chg, enable, vset, iset); | |
604 | } | |
605 | ||
db43e6c4 LJ |
606 | /** |
607 | * ab8540_chargalg_usb_pp_en() - Enable/ disable USB power path | |
608 | * @di: pointer to the abx500_chargalg structure | |
609 | * @enable: power path enable/disable | |
610 | * | |
611 | * The USB power path will be enable/ disable | |
612 | */ | |
613 | static int ab8540_chargalg_usb_pp_en(struct abx500_chargalg *di, bool enable) | |
614 | { | |
615 | if (!di->usb_chg || !di->usb_chg->ops.pp_enable) | |
616 | return -ENXIO; | |
617 | ||
618 | return di->usb_chg->ops.pp_enable(di->usb_chg, enable); | |
619 | } | |
620 | ||
621 | /** | |
622 | * ab8540_chargalg_usb_pre_chg_en() - Enable/ disable USB pre-charge | |
623 | * @di: pointer to the abx500_chargalg structure | |
624 | * @enable: USB pre-charge enable/disable | |
625 | * | |
626 | * The USB USB pre-charge will be enable/ disable | |
627 | */ | |
628 | static int ab8540_chargalg_usb_pre_chg_en(struct abx500_chargalg *di, | |
629 | bool enable) | |
630 | { | |
631 | if (!di->usb_chg || !di->usb_chg->ops.pre_chg_enable) | |
632 | return -ENXIO; | |
633 | ||
634 | return di->usb_chg->ops.pre_chg_enable(di->usb_chg, enable); | |
635 | } | |
636 | ||
1668f811 AM |
637 | /** |
638 | * abx500_chargalg_update_chg_curr() - Update charger current | |
639 | * @di: pointer to the abx500_chargalg structure | |
640 | * @iset: requested charger output current | |
641 | * | |
642 | * The charger output current will be updated for the charger | |
643 | * that is currently in use | |
644 | */ | |
645 | static int abx500_chargalg_update_chg_curr(struct abx500_chargalg *di, | |
646 | int iset) | |
647 | { | |
648 | /* Check if charger exists and update current if charging */ | |
649 | if (di->ac_chg && di->ac_chg->ops.update_curr && | |
650 | di->chg_info.charger_type & AC_CHG) { | |
651 | /* | |
652 | * Select maximum of what both the charger | |
653 | * and the battery supports | |
654 | */ | |
655 | if (di->ac_chg->max_out_curr) | |
656 | iset = min(iset, di->ac_chg->max_out_curr); | |
657 | ||
658 | di->chg_info.ac_iset = iset; | |
659 | ||
660 | return di->ac_chg->ops.update_curr(di->ac_chg, iset); | |
661 | } else if (di->usb_chg && di->usb_chg->ops.update_curr && | |
662 | di->chg_info.charger_type & USB_CHG) { | |
663 | /* | |
664 | * Select maximum of what both the charger | |
665 | * and the battery supports | |
666 | */ | |
667 | if (di->usb_chg->max_out_curr) | |
668 | iset = min(iset, di->usb_chg->max_out_curr); | |
669 | ||
670 | di->chg_info.usb_iset = iset; | |
671 | ||
672 | return di->usb_chg->ops.update_curr(di->usb_chg, iset); | |
673 | } | |
674 | ||
675 | return -ENXIO; | |
676 | } | |
677 | ||
678 | /** | |
679 | * abx500_chargalg_stop_charging() - Stop charging | |
680 | * @di: pointer to the abx500_chargalg structure | |
681 | * | |
682 | * This function is called from any state where charging should be stopped. | |
683 | * All charging is disabled and all status parameters and timers are changed | |
684 | * accordingly | |
685 | */ | |
686 | static void abx500_chargalg_stop_charging(struct abx500_chargalg *di) | |
687 | { | |
688 | abx500_chargalg_ac_en(di, false, 0, 0); | |
689 | abx500_chargalg_usb_en(di, false, 0, 0); | |
690 | abx500_chargalg_stop_safety_timer(di); | |
691 | abx500_chargalg_stop_maintenance_timer(di); | |
692 | di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
693 | di->maintenance_chg = false; | |
694 | cancel_delayed_work(&di->chargalg_wd_work); | |
297d716f | 695 | power_supply_changed(di->chargalg_psy); |
1668f811 AM |
696 | } |
697 | ||
698 | /** | |
699 | * abx500_chargalg_hold_charging() - Pauses charging | |
700 | * @di: pointer to the abx500_chargalg structure | |
701 | * | |
702 | * This function is called in the case where maintenance charging has been | |
703 | * disabled and instead a battery voltage mode is entered to check when the | |
704 | * battery voltage has reached a certain recharge voltage | |
705 | */ | |
706 | static void abx500_chargalg_hold_charging(struct abx500_chargalg *di) | |
707 | { | |
708 | abx500_chargalg_ac_en(di, false, 0, 0); | |
709 | abx500_chargalg_usb_en(di, false, 0, 0); | |
710 | abx500_chargalg_stop_safety_timer(di); | |
711 | abx500_chargalg_stop_maintenance_timer(di); | |
712 | di->charge_status = POWER_SUPPLY_STATUS_CHARGING; | |
713 | di->maintenance_chg = false; | |
714 | cancel_delayed_work(&di->chargalg_wd_work); | |
297d716f | 715 | power_supply_changed(di->chargalg_psy); |
1668f811 AM |
716 | } |
717 | ||
718 | /** | |
719 | * abx500_chargalg_start_charging() - Start the charger | |
720 | * @di: pointer to the abx500_chargalg structure | |
721 | * @vset: requested charger output voltage | |
722 | * @iset: requested charger output current | |
723 | * | |
724 | * A charger will be enabled depending on the requested charger type that was | |
725 | * detected previously. | |
726 | */ | |
727 | static void abx500_chargalg_start_charging(struct abx500_chargalg *di, | |
728 | int vset, int iset) | |
729 | { | |
730 | switch (di->chg_info.charger_type) { | |
731 | case AC_CHG: | |
732 | dev_dbg(di->dev, | |
733 | "AC parameters: Vset %d, Ich %d\n", vset, iset); | |
734 | abx500_chargalg_usb_en(di, false, 0, 0); | |
735 | abx500_chargalg_ac_en(di, true, vset, iset); | |
736 | break; | |
737 | ||
738 | case USB_CHG: | |
739 | dev_dbg(di->dev, | |
740 | "USB parameters: Vset %d, Ich %d\n", vset, iset); | |
741 | abx500_chargalg_ac_en(di, false, 0, 0); | |
742 | abx500_chargalg_usb_en(di, true, vset, iset); | |
743 | break; | |
744 | ||
745 | default: | |
746 | dev_err(di->dev, "Unknown charger to charge from\n"); | |
747 | break; | |
748 | } | |
749 | } | |
750 | ||
751 | /** | |
752 | * abx500_chargalg_check_temp() - Check battery temperature ranges | |
753 | * @di: pointer to the abx500_chargalg structure | |
754 | * | |
755 | * The battery temperature is checked against the predefined limits and the | |
756 | * charge state is changed accordingly | |
757 | */ | |
758 | static void abx500_chargalg_check_temp(struct abx500_chargalg *di) | |
759 | { | |
b0284de0 LJ |
760 | if (di->batt_data.temp > (di->bm->temp_low + di->t_hyst_norm) && |
761 | di->batt_data.temp < (di->bm->temp_high - di->t_hyst_norm)) { | |
1668f811 AM |
762 | /* Temp OK! */ |
763 | di->events.btemp_underover = false; | |
764 | di->events.btemp_lowhigh = false; | |
765 | di->t_hyst_norm = 0; | |
766 | di->t_hyst_lowhigh = 0; | |
767 | } else { | |
b0284de0 | 768 | if (((di->batt_data.temp >= di->bm->temp_high) && |
1668f811 | 769 | (di->batt_data.temp < |
b0284de0 | 770 | (di->bm->temp_over - di->t_hyst_lowhigh))) || |
1668f811 | 771 | ((di->batt_data.temp > |
b0284de0 LJ |
772 | (di->bm->temp_under + di->t_hyst_lowhigh)) && |
773 | (di->batt_data.temp <= di->bm->temp_low))) { | |
1668f811 AM |
774 | /* TEMP minor!!!!! */ |
775 | di->events.btemp_underover = false; | |
776 | di->events.btemp_lowhigh = true; | |
b0284de0 | 777 | di->t_hyst_norm = di->bm->temp_hysteresis; |
1668f811 | 778 | di->t_hyst_lowhigh = 0; |
b0284de0 LJ |
779 | } else if (di->batt_data.temp <= di->bm->temp_under || |
780 | di->batt_data.temp >= di->bm->temp_over) { | |
1668f811 AM |
781 | /* TEMP major!!!!! */ |
782 | di->events.btemp_underover = true; | |
783 | di->events.btemp_lowhigh = false; | |
784 | di->t_hyst_norm = 0; | |
b0284de0 | 785 | di->t_hyst_lowhigh = di->bm->temp_hysteresis; |
1668f811 AM |
786 | } else { |
787 | /* Within hysteresis */ | |
788 | dev_dbg(di->dev, "Within hysteresis limit temp: %d " | |
789 | "hyst_lowhigh %d, hyst normal %d\n", | |
790 | di->batt_data.temp, di->t_hyst_lowhigh, | |
791 | di->t_hyst_norm); | |
792 | } | |
793 | } | |
794 | } | |
795 | ||
796 | /** | |
797 | * abx500_chargalg_check_charger_voltage() - Check charger voltage | |
798 | * @di: pointer to the abx500_chargalg structure | |
799 | * | |
800 | * Charger voltage is checked against maximum limit | |
801 | */ | |
802 | static void abx500_chargalg_check_charger_voltage(struct abx500_chargalg *di) | |
803 | { | |
b0284de0 | 804 | if (di->chg_info.usb_volt > di->bm->chg_params->usb_volt_max) |
1668f811 AM |
805 | di->chg_info.usb_chg_ok = false; |
806 | else | |
807 | di->chg_info.usb_chg_ok = true; | |
808 | ||
b0284de0 | 809 | if (di->chg_info.ac_volt > di->bm->chg_params->ac_volt_max) |
1668f811 AM |
810 | di->chg_info.ac_chg_ok = false; |
811 | else | |
812 | di->chg_info.ac_chg_ok = true; | |
813 | ||
814 | } | |
815 | ||
816 | /** | |
817 | * abx500_chargalg_end_of_charge() - Check if end-of-charge criteria is fulfilled | |
818 | * @di: pointer to the abx500_chargalg structure | |
819 | * | |
820 | * End-of-charge criteria is fulfilled when the battery voltage is above a | |
821 | * certain limit and the battery current is below a certain limit for a | |
822 | * predefined number of consecutive seconds. If true, the battery is full | |
823 | */ | |
824 | static void abx500_chargalg_end_of_charge(struct abx500_chargalg *di) | |
825 | { | |
826 | if (di->charge_status == POWER_SUPPLY_STATUS_CHARGING && | |
827 | di->charge_state == STATE_NORMAL && | |
828 | !di->maintenance_chg && (di->batt_data.volt >= | |
b0284de0 | 829 | di->bm->bat_type[di->bm->batt_id].termination_vol || |
1668f811 AM |
830 | di->events.usb_cv_active || di->events.ac_cv_active) && |
831 | di->batt_data.avg_curr < | |
b0284de0 | 832 | di->bm->bat_type[di->bm->batt_id].termination_curr && |
1668f811 AM |
833 | di->batt_data.avg_curr > 0) { |
834 | if (++di->eoc_cnt >= EOC_COND_CNT) { | |
835 | di->eoc_cnt = 0; | |
db43e6c4 LJ |
836 | if ((di->chg_info.charger_type & USB_CHG) && |
837 | (di->usb_chg->power_path)) | |
838 | ab8540_chargalg_usb_pp_en(di, true); | |
1668f811 AM |
839 | di->charge_status = POWER_SUPPLY_STATUS_FULL; |
840 | di->maintenance_chg = true; | |
841 | dev_dbg(di->dev, "EOC reached!\n"); | |
297d716f | 842 | power_supply_changed(di->chargalg_psy); |
1668f811 AM |
843 | } else { |
844 | dev_dbg(di->dev, | |
845 | " EOC limit reached for the %d" | |
846 | " time, out of %d before EOC\n", | |
847 | di->eoc_cnt, | |
848 | EOC_COND_CNT); | |
849 | } | |
850 | } else { | |
851 | di->eoc_cnt = 0; | |
852 | } | |
853 | } | |
854 | ||
855 | static void init_maxim_chg_curr(struct abx500_chargalg *di) | |
856 | { | |
857 | di->ccm.original_iset = | |
b0284de0 | 858 | di->bm->bat_type[di->bm->batt_id].normal_cur_lvl; |
1668f811 | 859 | di->ccm.current_iset = |
b0284de0 LJ |
860 | di->bm->bat_type[di->bm->batt_id].normal_cur_lvl; |
861 | di->ccm.test_delta_i = di->bm->maxi->charger_curr_step; | |
862 | di->ccm.max_current = di->bm->maxi->chg_curr; | |
863 | di->ccm.condition_cnt = di->bm->maxi->wait_cycles; | |
1668f811 AM |
864 | di->ccm.level = 0; |
865 | } | |
866 | ||
867 | /** | |
868 | * abx500_chargalg_chg_curr_maxim - increases the charger current to | |
869 | * compensate for the system load | |
870 | * @di pointer to the abx500_chargalg structure | |
871 | * | |
872 | * This maximization function is used to raise the charger current to get the | |
873 | * battery current as close to the optimal value as possible. The battery | |
874 | * current during charging is affected by the system load | |
875 | */ | |
876 | static enum maxim_ret abx500_chargalg_chg_curr_maxim(struct abx500_chargalg *di) | |
877 | { | |
878 | int delta_i; | |
879 | ||
b0284de0 | 880 | if (!di->bm->maxi->ena_maxi) |
1668f811 AM |
881 | return MAXIM_RET_NOACTION; |
882 | ||
883 | delta_i = di->ccm.original_iset - di->batt_data.inst_curr; | |
884 | ||
885 | if (di->events.vbus_collapsed) { | |
886 | dev_dbg(di->dev, "Charger voltage has collapsed %d\n", | |
887 | di->ccm.wait_cnt); | |
888 | if (di->ccm.wait_cnt == 0) { | |
889 | dev_dbg(di->dev, "lowering current\n"); | |
890 | di->ccm.wait_cnt++; | |
b0284de0 | 891 | di->ccm.condition_cnt = di->bm->maxi->wait_cycles; |
1668f811 AM |
892 | di->ccm.max_current = |
893 | di->ccm.current_iset - di->ccm.test_delta_i; | |
894 | di->ccm.current_iset = di->ccm.max_current; | |
895 | di->ccm.level--; | |
896 | return MAXIM_RET_CHANGE; | |
897 | } else { | |
898 | dev_dbg(di->dev, "waiting\n"); | |
899 | /* Let's go in here twice before lowering curr again */ | |
900 | di->ccm.wait_cnt = (di->ccm.wait_cnt + 1) % 3; | |
901 | return MAXIM_RET_NOACTION; | |
902 | } | |
903 | } | |
904 | ||
905 | di->ccm.wait_cnt = 0; | |
906 | ||
907 | if ((di->batt_data.inst_curr > di->ccm.original_iset)) { | |
908 | dev_dbg(di->dev, " Maximization Ibat (%dmA) too high" | |
909 | " (limit %dmA) (current iset: %dmA)!\n", | |
910 | di->batt_data.inst_curr, di->ccm.original_iset, | |
911 | di->ccm.current_iset); | |
912 | ||
913 | if (di->ccm.current_iset == di->ccm.original_iset) | |
914 | return MAXIM_RET_NOACTION; | |
915 | ||
b0284de0 | 916 | di->ccm.condition_cnt = di->bm->maxi->wait_cycles; |
1668f811 AM |
917 | di->ccm.current_iset = di->ccm.original_iset; |
918 | di->ccm.level = 0; | |
919 | ||
920 | return MAXIM_RET_IBAT_TOO_HIGH; | |
921 | } | |
922 | ||
923 | if (delta_i > di->ccm.test_delta_i && | |
924 | (di->ccm.current_iset + di->ccm.test_delta_i) < | |
925 | di->ccm.max_current) { | |
926 | if (di->ccm.condition_cnt-- == 0) { | |
927 | /* Increse the iset with cco.test_delta_i */ | |
b0284de0 | 928 | di->ccm.condition_cnt = di->bm->maxi->wait_cycles; |
1668f811 AM |
929 | di->ccm.current_iset += di->ccm.test_delta_i; |
930 | di->ccm.level++; | |
931 | dev_dbg(di->dev, " Maximization needed, increase" | |
932 | " with %d mA to %dmA (Optimal ibat: %d)" | |
933 | " Level %d\n", | |
934 | di->ccm.test_delta_i, | |
935 | di->ccm.current_iset, | |
936 | di->ccm.original_iset, | |
937 | di->ccm.level); | |
938 | return MAXIM_RET_CHANGE; | |
939 | } else { | |
940 | return MAXIM_RET_NOACTION; | |
941 | } | |
942 | } else { | |
b0284de0 | 943 | di->ccm.condition_cnt = di->bm->maxi->wait_cycles; |
1668f811 AM |
944 | return MAXIM_RET_NOACTION; |
945 | } | |
946 | } | |
947 | ||
948 | static void handle_maxim_chg_curr(struct abx500_chargalg *di) | |
949 | { | |
950 | enum maxim_ret ret; | |
951 | int result; | |
952 | ||
953 | ret = abx500_chargalg_chg_curr_maxim(di); | |
954 | switch (ret) { | |
955 | case MAXIM_RET_CHANGE: | |
956 | result = abx500_chargalg_update_chg_curr(di, | |
957 | di->ccm.current_iset); | |
958 | if (result) | |
959 | dev_err(di->dev, "failed to set chg curr\n"); | |
960 | break; | |
961 | case MAXIM_RET_IBAT_TOO_HIGH: | |
962 | result = abx500_chargalg_update_chg_curr(di, | |
b0284de0 | 963 | di->bm->bat_type[di->bm->batt_id].normal_cur_lvl); |
1668f811 AM |
964 | if (result) |
965 | dev_err(di->dev, "failed to set chg curr\n"); | |
966 | break; | |
967 | ||
968 | case MAXIM_RET_NOACTION: | |
969 | default: | |
970 | /* Do nothing..*/ | |
971 | break; | |
972 | } | |
973 | } | |
974 | ||
975 | static int abx500_chargalg_get_ext_psy_data(struct device *dev, void *data) | |
976 | { | |
977 | struct power_supply *psy; | |
ea32cea1 AS |
978 | struct power_supply *ext = dev_get_drvdata(dev); |
979 | const char **supplicants = (const char **)ext->supplied_to; | |
1668f811 AM |
980 | struct abx500_chargalg *di; |
981 | union power_supply_propval ret; | |
ea32cea1 | 982 | int j; |
ea402401 | 983 | bool capacity_updated = false; |
1668f811 AM |
984 | |
985 | psy = (struct power_supply *)data; | |
297d716f | 986 | di = power_supply_get_drvdata(psy); |
1668f811 | 987 | /* For all psy where the driver name appears in any supplied_to */ |
ea32cea1 AS |
988 | j = match_string(supplicants, ext->num_supplicants, psy->desc->name); |
989 | if (j < 0) | |
1668f811 AM |
990 | return 0; |
991 | ||
ea402401 MC |
992 | /* |
993 | * If external is not registering 'POWER_SUPPLY_PROP_CAPACITY' to its | |
994 | * property because of handling that sysfs entry on its own, this is | |
995 | * the place to get the battery capacity. | |
996 | */ | |
15077fc1 | 997 | if (!power_supply_get_property(ext, POWER_SUPPLY_PROP_CAPACITY, &ret)) { |
ea402401 MC |
998 | di->batt_data.percent = ret.intval; |
999 | capacity_updated = true; | |
1000 | } | |
1001 | ||
1668f811 | 1002 | /* Go through all properties for the psy */ |
297d716f | 1003 | for (j = 0; j < ext->desc->num_properties; j++) { |
1668f811 | 1004 | enum power_supply_property prop; |
297d716f | 1005 | prop = ext->desc->properties[j]; |
1668f811 | 1006 | |
297d716f KK |
1007 | /* |
1008 | * Initialize chargers if not already done. | |
1009 | * The ab8500_charger*/ | |
1668f811 | 1010 | if (!di->ac_chg && |
297d716f | 1011 | ext->desc->type == POWER_SUPPLY_TYPE_MAINS) |
1668f811 AM |
1012 | di->ac_chg = psy_to_ux500_charger(ext); |
1013 | else if (!di->usb_chg && | |
297d716f | 1014 | ext->desc->type == POWER_SUPPLY_TYPE_USB) |
1668f811 AM |
1015 | di->usb_chg = psy_to_ux500_charger(ext); |
1016 | ||
15077fc1 | 1017 | if (power_supply_get_property(ext, prop, &ret)) |
1668f811 AM |
1018 | continue; |
1019 | switch (prop) { | |
1020 | case POWER_SUPPLY_PROP_PRESENT: | |
297d716f | 1021 | switch (ext->desc->type) { |
1668f811 AM |
1022 | case POWER_SUPPLY_TYPE_BATTERY: |
1023 | /* Battery present */ | |
1024 | if (ret.intval) | |
1025 | di->events.batt_rem = false; | |
1026 | /* Battery removed */ | |
1027 | else | |
1028 | di->events.batt_rem = true; | |
1029 | break; | |
1030 | case POWER_SUPPLY_TYPE_MAINS: | |
1031 | /* AC disconnected */ | |
1032 | if (!ret.intval && | |
1033 | (di->chg_info.conn_chg & AC_CHG)) { | |
1034 | di->chg_info.prev_conn_chg = | |
1035 | di->chg_info.conn_chg; | |
1036 | di->chg_info.conn_chg &= ~AC_CHG; | |
1037 | } | |
1038 | /* AC connected */ | |
1039 | else if (ret.intval && | |
1040 | !(di->chg_info.conn_chg & AC_CHG)) { | |
1041 | di->chg_info.prev_conn_chg = | |
1042 | di->chg_info.conn_chg; | |
1043 | di->chg_info.conn_chg |= AC_CHG; | |
1044 | } | |
1045 | break; | |
1046 | case POWER_SUPPLY_TYPE_USB: | |
1047 | /* USB disconnected */ | |
1048 | if (!ret.intval && | |
1049 | (di->chg_info.conn_chg & USB_CHG)) { | |
1050 | di->chg_info.prev_conn_chg = | |
1051 | di->chg_info.conn_chg; | |
1052 | di->chg_info.conn_chg &= ~USB_CHG; | |
1053 | } | |
1054 | /* USB connected */ | |
1055 | else if (ret.intval && | |
1056 | !(di->chg_info.conn_chg & USB_CHG)) { | |
1057 | di->chg_info.prev_conn_chg = | |
1058 | di->chg_info.conn_chg; | |
1059 | di->chg_info.conn_chg |= USB_CHG; | |
1060 | } | |
1061 | break; | |
1062 | default: | |
1063 | break; | |
1064 | } | |
1065 | break; | |
1066 | ||
1067 | case POWER_SUPPLY_PROP_ONLINE: | |
297d716f | 1068 | switch (ext->desc->type) { |
1668f811 AM |
1069 | case POWER_SUPPLY_TYPE_BATTERY: |
1070 | break; | |
1071 | case POWER_SUPPLY_TYPE_MAINS: | |
1072 | /* AC offline */ | |
1073 | if (!ret.intval && | |
1074 | (di->chg_info.online_chg & AC_CHG)) { | |
1075 | di->chg_info.prev_online_chg = | |
1076 | di->chg_info.online_chg; | |
1077 | di->chg_info.online_chg &= ~AC_CHG; | |
1078 | } | |
1079 | /* AC online */ | |
1080 | else if (ret.intval && | |
1081 | !(di->chg_info.online_chg & AC_CHG)) { | |
1082 | di->chg_info.prev_online_chg = | |
1083 | di->chg_info.online_chg; | |
1084 | di->chg_info.online_chg |= AC_CHG; | |
1085 | queue_delayed_work(di->chargalg_wq, | |
1086 | &di->chargalg_wd_work, 0); | |
1087 | } | |
1088 | break; | |
1089 | case POWER_SUPPLY_TYPE_USB: | |
1090 | /* USB offline */ | |
1091 | if (!ret.intval && | |
1092 | (di->chg_info.online_chg & USB_CHG)) { | |
1093 | di->chg_info.prev_online_chg = | |
1094 | di->chg_info.online_chg; | |
1095 | di->chg_info.online_chg &= ~USB_CHG; | |
1096 | } | |
1097 | /* USB online */ | |
1098 | else if (ret.intval && | |
1099 | !(di->chg_info.online_chg & USB_CHG)) { | |
1100 | di->chg_info.prev_online_chg = | |
1101 | di->chg_info.online_chg; | |
1102 | di->chg_info.online_chg |= USB_CHG; | |
1103 | queue_delayed_work(di->chargalg_wq, | |
1104 | &di->chargalg_wd_work, 0); | |
1105 | } | |
1106 | break; | |
1107 | default: | |
1108 | break; | |
1109 | } | |
1110 | break; | |
1111 | ||
1112 | case POWER_SUPPLY_PROP_HEALTH: | |
297d716f | 1113 | switch (ext->desc->type) { |
1668f811 AM |
1114 | case POWER_SUPPLY_TYPE_BATTERY: |
1115 | break; | |
1116 | case POWER_SUPPLY_TYPE_MAINS: | |
1117 | switch (ret.intval) { | |
1118 | case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE: | |
1119 | di->events.mainextchnotok = true; | |
1120 | di->events.main_thermal_prot = false; | |
1121 | di->events.main_ovv = false; | |
1122 | di->events.ac_wd_expired = false; | |
1123 | break; | |
1124 | case POWER_SUPPLY_HEALTH_DEAD: | |
1125 | di->events.ac_wd_expired = true; | |
1126 | di->events.mainextchnotok = false; | |
1127 | di->events.main_ovv = false; | |
1128 | di->events.main_thermal_prot = false; | |
1129 | break; | |
1130 | case POWER_SUPPLY_HEALTH_COLD: | |
1131 | case POWER_SUPPLY_HEALTH_OVERHEAT: | |
1132 | di->events.main_thermal_prot = true; | |
1133 | di->events.mainextchnotok = false; | |
1134 | di->events.main_ovv = false; | |
1135 | di->events.ac_wd_expired = false; | |
1136 | break; | |
1137 | case POWER_SUPPLY_HEALTH_OVERVOLTAGE: | |
1138 | di->events.main_ovv = true; | |
1139 | di->events.mainextchnotok = false; | |
1140 | di->events.main_thermal_prot = false; | |
1141 | di->events.ac_wd_expired = false; | |
1142 | break; | |
1143 | case POWER_SUPPLY_HEALTH_GOOD: | |
1144 | di->events.main_thermal_prot = false; | |
1145 | di->events.mainextchnotok = false; | |
1146 | di->events.main_ovv = false; | |
1147 | di->events.ac_wd_expired = false; | |
1148 | break; | |
1149 | default: | |
1150 | break; | |
1151 | } | |
1152 | break; | |
1153 | ||
1154 | case POWER_SUPPLY_TYPE_USB: | |
1155 | switch (ret.intval) { | |
1156 | case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE: | |
1157 | di->events.usbchargernotok = true; | |
1158 | di->events.usb_thermal_prot = false; | |
1159 | di->events.vbus_ovv = false; | |
1160 | di->events.usb_wd_expired = false; | |
1161 | break; | |
1162 | case POWER_SUPPLY_HEALTH_DEAD: | |
1163 | di->events.usb_wd_expired = true; | |
1164 | di->events.usbchargernotok = false; | |
1165 | di->events.usb_thermal_prot = false; | |
1166 | di->events.vbus_ovv = false; | |
1167 | break; | |
1168 | case POWER_SUPPLY_HEALTH_COLD: | |
1169 | case POWER_SUPPLY_HEALTH_OVERHEAT: | |
1170 | di->events.usb_thermal_prot = true; | |
1171 | di->events.usbchargernotok = false; | |
1172 | di->events.vbus_ovv = false; | |
1173 | di->events.usb_wd_expired = false; | |
1174 | break; | |
1175 | case POWER_SUPPLY_HEALTH_OVERVOLTAGE: | |
1176 | di->events.vbus_ovv = true; | |
1177 | di->events.usbchargernotok = false; | |
1178 | di->events.usb_thermal_prot = false; | |
1179 | di->events.usb_wd_expired = false; | |
1180 | break; | |
1181 | case POWER_SUPPLY_HEALTH_GOOD: | |
1182 | di->events.usbchargernotok = false; | |
1183 | di->events.usb_thermal_prot = false; | |
1184 | di->events.vbus_ovv = false; | |
1185 | di->events.usb_wd_expired = false; | |
1186 | break; | |
1187 | default: | |
1188 | break; | |
1189 | } | |
1190 | default: | |
1191 | break; | |
1192 | } | |
1193 | break; | |
1194 | ||
1195 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
297d716f | 1196 | switch (ext->desc->type) { |
1668f811 AM |
1197 | case POWER_SUPPLY_TYPE_BATTERY: |
1198 | di->batt_data.volt = ret.intval / 1000; | |
1199 | break; | |
1200 | case POWER_SUPPLY_TYPE_MAINS: | |
1201 | di->chg_info.ac_volt = ret.intval / 1000; | |
1202 | break; | |
1203 | case POWER_SUPPLY_TYPE_USB: | |
1204 | di->chg_info.usb_volt = ret.intval / 1000; | |
1205 | break; | |
1206 | default: | |
1207 | break; | |
1208 | } | |
1209 | break; | |
1210 | ||
1211 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
297d716f | 1212 | switch (ext->desc->type) { |
1668f811 AM |
1213 | case POWER_SUPPLY_TYPE_MAINS: |
1214 | /* AVG is used to indicate when we are | |
1215 | * in CV mode */ | |
1216 | if (ret.intval) | |
1217 | di->events.ac_cv_active = true; | |
1218 | else | |
1219 | di->events.ac_cv_active = false; | |
1220 | ||
1221 | break; | |
1222 | case POWER_SUPPLY_TYPE_USB: | |
1223 | /* AVG is used to indicate when we are | |
1224 | * in CV mode */ | |
1225 | if (ret.intval) | |
1226 | di->events.usb_cv_active = true; | |
1227 | else | |
1228 | di->events.usb_cv_active = false; | |
1229 | ||
1230 | break; | |
1231 | default: | |
1232 | break; | |
1233 | } | |
1234 | break; | |
1235 | ||
1236 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
297d716f | 1237 | switch (ext->desc->type) { |
1668f811 AM |
1238 | case POWER_SUPPLY_TYPE_BATTERY: |
1239 | if (ret.intval) | |
1240 | di->events.batt_unknown = false; | |
1241 | else | |
1242 | di->events.batt_unknown = true; | |
1243 | ||
1244 | break; | |
1245 | default: | |
1246 | break; | |
1247 | } | |
1248 | break; | |
1249 | ||
1250 | case POWER_SUPPLY_PROP_TEMP: | |
1251 | di->batt_data.temp = ret.intval / 10; | |
1252 | break; | |
1253 | ||
1254 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
297d716f | 1255 | switch (ext->desc->type) { |
1668f811 AM |
1256 | case POWER_SUPPLY_TYPE_MAINS: |
1257 | di->chg_info.ac_curr = | |
1258 | ret.intval / 1000; | |
1259 | break; | |
1260 | case POWER_SUPPLY_TYPE_USB: | |
1261 | di->chg_info.usb_curr = | |
1262 | ret.intval / 1000; | |
1263 | break; | |
1264 | case POWER_SUPPLY_TYPE_BATTERY: | |
1265 | di->batt_data.inst_curr = ret.intval / 1000; | |
1266 | break; | |
1267 | default: | |
1268 | break; | |
1269 | } | |
1270 | break; | |
1271 | ||
1272 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
297d716f | 1273 | switch (ext->desc->type) { |
1668f811 AM |
1274 | case POWER_SUPPLY_TYPE_BATTERY: |
1275 | di->batt_data.avg_curr = ret.intval / 1000; | |
1276 | break; | |
1277 | case POWER_SUPPLY_TYPE_USB: | |
1278 | if (ret.intval) | |
1279 | di->events.vbus_collapsed = true; | |
1280 | else | |
1281 | di->events.vbus_collapsed = false; | |
1282 | break; | |
1283 | default: | |
1284 | break; | |
1285 | } | |
1286 | break; | |
1287 | case POWER_SUPPLY_PROP_CAPACITY: | |
ea402401 MC |
1288 | if (!capacity_updated) |
1289 | di->batt_data.percent = ret.intval; | |
1668f811 AM |
1290 | break; |
1291 | default: | |
1292 | break; | |
1293 | } | |
1294 | } | |
1295 | return 0; | |
1296 | } | |
1297 | ||
1298 | /** | |
1299 | * abx500_chargalg_external_power_changed() - callback for power supply changes | |
1300 | * @psy: pointer to the structure power_supply | |
1301 | * | |
1302 | * This function is the entry point of the pointer external_power_changed | |
1303 | * of the structure power_supply. | |
1304 | * This function gets executed when there is a change in any external power | |
1305 | * supply that this driver needs to be notified of. | |
1306 | */ | |
1307 | static void abx500_chargalg_external_power_changed(struct power_supply *psy) | |
1308 | { | |
297d716f | 1309 | struct abx500_chargalg *di = power_supply_get_drvdata(psy); |
1668f811 AM |
1310 | |
1311 | /* | |
1312 | * Trigger execution of the algorithm instantly and read | |
1313 | * all power_supply properties there instead | |
1314 | */ | |
1315 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
1316 | } | |
1317 | ||
1318 | /** | |
1319 | * abx500_chargalg_algorithm() - Main function for the algorithm | |
1320 | * @di: pointer to the abx500_chargalg structure | |
1321 | * | |
1322 | * This is the main control function for the charging algorithm. | |
1323 | * It is called periodically or when something happens that will | |
1324 | * trigger a state change | |
1325 | */ | |
1326 | static void abx500_chargalg_algorithm(struct abx500_chargalg *di) | |
1327 | { | |
1328 | int charger_status; | |
4dcdf577 | 1329 | int ret; |
4d3b4aa5 | 1330 | int curr_step_lvl; |
1668f811 AM |
1331 | |
1332 | /* Collect data from all power_supply class devices */ | |
1333 | class_for_each_device(power_supply_class, NULL, | |
297d716f | 1334 | di->chargalg_psy, abx500_chargalg_get_ext_psy_data); |
1668f811 AM |
1335 | |
1336 | abx500_chargalg_end_of_charge(di); | |
1337 | abx500_chargalg_check_temp(di); | |
1338 | abx500_chargalg_check_charger_voltage(di); | |
1339 | ||
1340 | charger_status = abx500_chargalg_check_charger_connection(di); | |
4d3b4aa5 | 1341 | abx500_chargalg_check_current_step_status(di); |
4dcdf577 LJ |
1342 | |
1343 | if (is_ab8500(di->parent)) { | |
1344 | ret = abx500_chargalg_check_charger_enable(di); | |
1345 | if (ret < 0) | |
1346 | dev_err(di->dev, "Checking charger is enabled error" | |
1347 | ": Returned Value %d\n", ret); | |
1348 | } | |
1349 | ||
1668f811 AM |
1350 | /* |
1351 | * First check if we have a charger connected. | |
1352 | * Also we don't allow charging of unknown batteries if configured | |
1353 | * this way | |
1354 | */ | |
1355 | if (!charger_status || | |
b0284de0 | 1356 | (di->events.batt_unknown && !di->bm->chg_unknown_bat)) { |
1668f811 AM |
1357 | if (di->charge_state != STATE_HANDHELD) { |
1358 | di->events.safety_timer_expired = false; | |
1359 | abx500_chargalg_state_to(di, STATE_HANDHELD_INIT); | |
1360 | } | |
1361 | } | |
1362 | ||
1363 | /* If suspended, we should not continue checking the flags */ | |
1364 | else if (di->charge_state == STATE_SUSPENDED_INIT || | |
1365 | di->charge_state == STATE_SUSPENDED) { | |
1366 | /* We don't do anything here, just don,t continue */ | |
1367 | } | |
1368 | ||
1369 | /* Safety timer expiration */ | |
1370 | else if (di->events.safety_timer_expired) { | |
1371 | if (di->charge_state != STATE_SAFETY_TIMER_EXPIRED) | |
1372 | abx500_chargalg_state_to(di, | |
1373 | STATE_SAFETY_TIMER_EXPIRED_INIT); | |
1374 | } | |
1375 | /* | |
1376 | * Check if any interrupts has occured | |
1377 | * that will prevent us from charging | |
1378 | */ | |
1379 | ||
1380 | /* Battery removed */ | |
1381 | else if (di->events.batt_rem) { | |
1382 | if (di->charge_state != STATE_BATT_REMOVED) | |
1383 | abx500_chargalg_state_to(di, STATE_BATT_REMOVED_INIT); | |
1384 | } | |
1385 | /* Main or USB charger not ok. */ | |
1386 | else if (di->events.mainextchnotok || di->events.usbchargernotok) { | |
1387 | /* | |
1388 | * If vbus_collapsed is set, we have to lower the charger | |
1389 | * current, which is done in the normal state below | |
1390 | */ | |
1391 | if (di->charge_state != STATE_CHG_NOT_OK && | |
1392 | !di->events.vbus_collapsed) | |
1393 | abx500_chargalg_state_to(di, STATE_CHG_NOT_OK_INIT); | |
1394 | } | |
1395 | /* VBUS, Main or VBAT OVV. */ | |
1396 | else if (di->events.vbus_ovv || | |
1397 | di->events.main_ovv || | |
1398 | di->events.batt_ovv || | |
1399 | !di->chg_info.usb_chg_ok || | |
1400 | !di->chg_info.ac_chg_ok) { | |
1401 | if (di->charge_state != STATE_OVV_PROTECT) | |
1402 | abx500_chargalg_state_to(di, STATE_OVV_PROTECT_INIT); | |
1403 | } | |
1404 | /* USB Thermal, stop charging */ | |
1405 | else if (di->events.main_thermal_prot || | |
1406 | di->events.usb_thermal_prot) { | |
1407 | if (di->charge_state != STATE_HW_TEMP_PROTECT) | |
1408 | abx500_chargalg_state_to(di, | |
1409 | STATE_HW_TEMP_PROTECT_INIT); | |
1410 | } | |
1411 | /* Battery temp over/under */ | |
1412 | else if (di->events.btemp_underover) { | |
1413 | if (di->charge_state != STATE_TEMP_UNDEROVER) | |
1414 | abx500_chargalg_state_to(di, | |
1415 | STATE_TEMP_UNDEROVER_INIT); | |
1416 | } | |
1417 | /* Watchdog expired */ | |
1418 | else if (di->events.ac_wd_expired || | |
1419 | di->events.usb_wd_expired) { | |
1420 | if (di->charge_state != STATE_WD_EXPIRED) | |
1421 | abx500_chargalg_state_to(di, STATE_WD_EXPIRED_INIT); | |
1422 | } | |
1423 | /* Battery temp high/low */ | |
1424 | else if (di->events.btemp_lowhigh) { | |
1425 | if (di->charge_state != STATE_TEMP_LOWHIGH) | |
1426 | abx500_chargalg_state_to(di, STATE_TEMP_LOWHIGH_INIT); | |
1427 | } | |
1428 | ||
1429 | dev_dbg(di->dev, | |
1430 | "[CHARGALG] Vb %d Ib_avg %d Ib_inst %d Tb %d Cap %d Maint %d " | |
1431 | "State %s Active_chg %d Chg_status %d AC %d USB %d " | |
1432 | "AC_online %d USB_online %d AC_CV %d USB_CV %d AC_I %d " | |
1433 | "USB_I %d AC_Vset %d AC_Iset %d USB_Vset %d USB_Iset %d\n", | |
1434 | di->batt_data.volt, | |
1435 | di->batt_data.avg_curr, | |
1436 | di->batt_data.inst_curr, | |
1437 | di->batt_data.temp, | |
1438 | di->batt_data.percent, | |
1439 | di->maintenance_chg, | |
1440 | states[di->charge_state], | |
1441 | di->chg_info.charger_type, | |
1442 | di->charge_status, | |
1443 | di->chg_info.conn_chg & AC_CHG, | |
1444 | di->chg_info.conn_chg & USB_CHG, | |
1445 | di->chg_info.online_chg & AC_CHG, | |
1446 | di->chg_info.online_chg & USB_CHG, | |
1447 | di->events.ac_cv_active, | |
1448 | di->events.usb_cv_active, | |
1449 | di->chg_info.ac_curr, | |
1450 | di->chg_info.usb_curr, | |
1451 | di->chg_info.ac_vset, | |
1452 | di->chg_info.ac_iset, | |
1453 | di->chg_info.usb_vset, | |
1454 | di->chg_info.usb_iset); | |
1455 | ||
1456 | switch (di->charge_state) { | |
1457 | case STATE_HANDHELD_INIT: | |
1458 | abx500_chargalg_stop_charging(di); | |
1459 | di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING; | |
1460 | abx500_chargalg_state_to(di, STATE_HANDHELD); | |
1461 | /* Intentional fallthrough */ | |
1462 | ||
1463 | case STATE_HANDHELD: | |
1464 | break; | |
1465 | ||
1466 | case STATE_SUSPENDED_INIT: | |
1467 | if (di->susp_status.ac_suspended) | |
1468 | abx500_chargalg_ac_en(di, false, 0, 0); | |
1469 | if (di->susp_status.usb_suspended) | |
1470 | abx500_chargalg_usb_en(di, false, 0, 0); | |
1471 | abx500_chargalg_stop_safety_timer(di); | |
1472 | abx500_chargalg_stop_maintenance_timer(di); | |
1473 | di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
1474 | di->maintenance_chg = false; | |
1475 | abx500_chargalg_state_to(di, STATE_SUSPENDED); | |
297d716f | 1476 | power_supply_changed(di->chargalg_psy); |
1668f811 AM |
1477 | /* Intentional fallthrough */ |
1478 | ||
1479 | case STATE_SUSPENDED: | |
1480 | /* CHARGING is suspended */ | |
1481 | break; | |
1482 | ||
1483 | case STATE_BATT_REMOVED_INIT: | |
1484 | abx500_chargalg_stop_charging(di); | |
1485 | abx500_chargalg_state_to(di, STATE_BATT_REMOVED); | |
1486 | /* Intentional fallthrough */ | |
1487 | ||
1488 | case STATE_BATT_REMOVED: | |
1489 | if (!di->events.batt_rem) | |
1490 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1491 | break; | |
1492 | ||
1493 | case STATE_HW_TEMP_PROTECT_INIT: | |
1494 | abx500_chargalg_stop_charging(di); | |
1495 | abx500_chargalg_state_to(di, STATE_HW_TEMP_PROTECT); | |
1496 | /* Intentional fallthrough */ | |
1497 | ||
1498 | case STATE_HW_TEMP_PROTECT: | |
1499 | if (!di->events.main_thermal_prot && | |
1500 | !di->events.usb_thermal_prot) | |
1501 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1502 | break; | |
1503 | ||
1504 | case STATE_OVV_PROTECT_INIT: | |
1505 | abx500_chargalg_stop_charging(di); | |
1506 | abx500_chargalg_state_to(di, STATE_OVV_PROTECT); | |
1507 | /* Intentional fallthrough */ | |
1508 | ||
1509 | case STATE_OVV_PROTECT: | |
1510 | if (!di->events.vbus_ovv && | |
1511 | !di->events.main_ovv && | |
1512 | !di->events.batt_ovv && | |
1513 | di->chg_info.usb_chg_ok && | |
1514 | di->chg_info.ac_chg_ok) | |
1515 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1516 | break; | |
1517 | ||
1518 | case STATE_CHG_NOT_OK_INIT: | |
1519 | abx500_chargalg_stop_charging(di); | |
1520 | abx500_chargalg_state_to(di, STATE_CHG_NOT_OK); | |
1521 | /* Intentional fallthrough */ | |
1522 | ||
1523 | case STATE_CHG_NOT_OK: | |
1524 | if (!di->events.mainextchnotok && | |
1525 | !di->events.usbchargernotok) | |
1526 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1527 | break; | |
1528 | ||
1529 | case STATE_SAFETY_TIMER_EXPIRED_INIT: | |
1530 | abx500_chargalg_stop_charging(di); | |
1531 | abx500_chargalg_state_to(di, STATE_SAFETY_TIMER_EXPIRED); | |
1532 | /* Intentional fallthrough */ | |
1533 | ||
1534 | case STATE_SAFETY_TIMER_EXPIRED: | |
1535 | /* We exit this state when charger is removed */ | |
1536 | break; | |
1537 | ||
1538 | case STATE_NORMAL_INIT: | |
db43e6c4 LJ |
1539 | if ((di->chg_info.charger_type & USB_CHG) && |
1540 | di->usb_chg->power_path) { | |
1541 | if (di->batt_data.volt > | |
1542 | (di->bm->fg_params->lowbat_threshold + | |
1543 | BAT_PLUS_MARGIN)) { | |
1544 | ab8540_chargalg_usb_pre_chg_en(di, false); | |
1545 | ab8540_chargalg_usb_pp_en(di, false); | |
1546 | } else { | |
1547 | ab8540_chargalg_usb_pp_en(di, true); | |
1548 | ab8540_chargalg_usb_pre_chg_en(di, true); | |
1549 | abx500_chargalg_state_to(di, | |
1550 | STATE_USB_PP_PRE_CHARGE); | |
1551 | break; | |
1552 | } | |
1553 | } | |
1554 | ||
4d3b4aa5 LJ |
1555 | if (di->curr_status.curr_step == CHARGALG_CURR_STEP_LOW) |
1556 | abx500_chargalg_stop_charging(di); | |
1557 | else { | |
1558 | curr_step_lvl = di->bm->bat_type[ | |
1559 | di->bm->batt_id].normal_cur_lvl | |
1560 | * di->curr_status.curr_step | |
1561 | / CHARGALG_CURR_STEP_HIGH; | |
1562 | abx500_chargalg_start_charging(di, | |
1563 | di->bm->bat_type[di->bm->batt_id] | |
1564 | .normal_vol_lvl, curr_step_lvl); | |
1565 | } | |
1566 | ||
1668f811 AM |
1567 | abx500_chargalg_state_to(di, STATE_NORMAL); |
1568 | abx500_chargalg_start_safety_timer(di); | |
1569 | abx500_chargalg_stop_maintenance_timer(di); | |
1570 | init_maxim_chg_curr(di); | |
1571 | di->charge_status = POWER_SUPPLY_STATUS_CHARGING; | |
1572 | di->eoc_cnt = 0; | |
1573 | di->maintenance_chg = false; | |
297d716f | 1574 | power_supply_changed(di->chargalg_psy); |
1668f811 AM |
1575 | |
1576 | break; | |
1577 | ||
db43e6c4 LJ |
1578 | case STATE_USB_PP_PRE_CHARGE: |
1579 | if (di->batt_data.volt > | |
1580 | (di->bm->fg_params->lowbat_threshold + | |
1581 | BAT_PLUS_MARGIN)) | |
1582 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1583 | break; | |
1584 | ||
1668f811 AM |
1585 | case STATE_NORMAL: |
1586 | handle_maxim_chg_curr(di); | |
1587 | if (di->charge_status == POWER_SUPPLY_STATUS_FULL && | |
1588 | di->maintenance_chg) { | |
b0284de0 | 1589 | if (di->bm->no_maintenance) |
1668f811 AM |
1590 | abx500_chargalg_state_to(di, |
1591 | STATE_WAIT_FOR_RECHARGE_INIT); | |
1592 | else | |
1593 | abx500_chargalg_state_to(di, | |
1594 | STATE_MAINTENANCE_A_INIT); | |
1595 | } | |
1596 | break; | |
1597 | ||
1598 | /* This state will be used when the maintenance state is disabled */ | |
1599 | case STATE_WAIT_FOR_RECHARGE_INIT: | |
1600 | abx500_chargalg_hold_charging(di); | |
1601 | abx500_chargalg_state_to(di, STATE_WAIT_FOR_RECHARGE); | |
1668f811 AM |
1602 | /* Intentional fallthrough */ |
1603 | ||
1604 | case STATE_WAIT_FOR_RECHARGE: | |
ea402401 MC |
1605 | if (di->batt_data.percent <= |
1606 | di->bm->bat_type[di->bm->batt_id]. | |
1607 | recharge_cap) | |
1608 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1668f811 AM |
1609 | break; |
1610 | ||
1611 | case STATE_MAINTENANCE_A_INIT: | |
1612 | abx500_chargalg_stop_safety_timer(di); | |
1613 | abx500_chargalg_start_maintenance_timer(di, | |
b0284de0 LJ |
1614 | di->bm->bat_type[ |
1615 | di->bm->batt_id].maint_a_chg_timer_h); | |
1668f811 | 1616 | abx500_chargalg_start_charging(di, |
b0284de0 LJ |
1617 | di->bm->bat_type[ |
1618 | di->bm->batt_id].maint_a_vol_lvl, | |
1619 | di->bm->bat_type[ | |
1620 | di->bm->batt_id].maint_a_cur_lvl); | |
1668f811 | 1621 | abx500_chargalg_state_to(di, STATE_MAINTENANCE_A); |
297d716f | 1622 | power_supply_changed(di->chargalg_psy); |
1668f811 AM |
1623 | /* Intentional fallthrough*/ |
1624 | ||
1625 | case STATE_MAINTENANCE_A: | |
1626 | if (di->events.maintenance_timer_expired) { | |
1627 | abx500_chargalg_stop_maintenance_timer(di); | |
1628 | abx500_chargalg_state_to(di, STATE_MAINTENANCE_B_INIT); | |
1629 | } | |
1630 | break; | |
1631 | ||
1632 | case STATE_MAINTENANCE_B_INIT: | |
1633 | abx500_chargalg_start_maintenance_timer(di, | |
b0284de0 LJ |
1634 | di->bm->bat_type[ |
1635 | di->bm->batt_id].maint_b_chg_timer_h); | |
1668f811 | 1636 | abx500_chargalg_start_charging(di, |
b0284de0 LJ |
1637 | di->bm->bat_type[ |
1638 | di->bm->batt_id].maint_b_vol_lvl, | |
1639 | di->bm->bat_type[ | |
1640 | di->bm->batt_id].maint_b_cur_lvl); | |
1668f811 | 1641 | abx500_chargalg_state_to(di, STATE_MAINTENANCE_B); |
297d716f | 1642 | power_supply_changed(di->chargalg_psy); |
1668f811 AM |
1643 | /* Intentional fallthrough*/ |
1644 | ||
1645 | case STATE_MAINTENANCE_B: | |
1646 | if (di->events.maintenance_timer_expired) { | |
1647 | abx500_chargalg_stop_maintenance_timer(di); | |
1648 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1649 | } | |
1650 | break; | |
1651 | ||
1652 | case STATE_TEMP_LOWHIGH_INIT: | |
1653 | abx500_chargalg_start_charging(di, | |
b0284de0 LJ |
1654 | di->bm->bat_type[ |
1655 | di->bm->batt_id].low_high_vol_lvl, | |
1656 | di->bm->bat_type[ | |
1657 | di->bm->batt_id].low_high_cur_lvl); | |
1668f811 AM |
1658 | abx500_chargalg_stop_maintenance_timer(di); |
1659 | di->charge_status = POWER_SUPPLY_STATUS_CHARGING; | |
1660 | abx500_chargalg_state_to(di, STATE_TEMP_LOWHIGH); | |
297d716f | 1661 | power_supply_changed(di->chargalg_psy); |
1668f811 AM |
1662 | /* Intentional fallthrough */ |
1663 | ||
1664 | case STATE_TEMP_LOWHIGH: | |
1665 | if (!di->events.btemp_lowhigh) | |
1666 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1667 | break; | |
1668 | ||
1669 | case STATE_WD_EXPIRED_INIT: | |
1670 | abx500_chargalg_stop_charging(di); | |
1671 | abx500_chargalg_state_to(di, STATE_WD_EXPIRED); | |
1672 | /* Intentional fallthrough */ | |
1673 | ||
1674 | case STATE_WD_EXPIRED: | |
1675 | if (!di->events.ac_wd_expired && | |
1676 | !di->events.usb_wd_expired) | |
1677 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1678 | break; | |
1679 | ||
1680 | case STATE_TEMP_UNDEROVER_INIT: | |
1681 | abx500_chargalg_stop_charging(di); | |
1682 | abx500_chargalg_state_to(di, STATE_TEMP_UNDEROVER); | |
1683 | /* Intentional fallthrough */ | |
1684 | ||
1685 | case STATE_TEMP_UNDEROVER: | |
1686 | if (!di->events.btemp_underover) | |
1687 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1688 | break; | |
1689 | } | |
1690 | ||
1691 | /* Start charging directly if the new state is a charge state */ | |
1692 | if (di->charge_state == STATE_NORMAL_INIT || | |
1693 | di->charge_state == STATE_MAINTENANCE_A_INIT || | |
1694 | di->charge_state == STATE_MAINTENANCE_B_INIT) | |
1695 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
1696 | } | |
1697 | ||
1698 | /** | |
1699 | * abx500_chargalg_periodic_work() - Periodic work for the algorithm | |
1700 | * @work: pointer to the work_struct structure | |
1701 | * | |
1702 | * Work queue function for the charging algorithm | |
1703 | */ | |
1704 | static void abx500_chargalg_periodic_work(struct work_struct *work) | |
1705 | { | |
1706 | struct abx500_chargalg *di = container_of(work, | |
1707 | struct abx500_chargalg, chargalg_periodic_work.work); | |
1708 | ||
1709 | abx500_chargalg_algorithm(di); | |
1710 | ||
1711 | /* | |
1712 | * If a charger is connected then the battery has to be monitored | |
1713 | * frequently, else the work can be delayed. | |
1714 | */ | |
1715 | if (di->chg_info.conn_chg) | |
1716 | queue_delayed_work(di->chargalg_wq, | |
1717 | &di->chargalg_periodic_work, | |
b0284de0 | 1718 | di->bm->interval_charging * HZ); |
1668f811 AM |
1719 | else |
1720 | queue_delayed_work(di->chargalg_wq, | |
1721 | &di->chargalg_periodic_work, | |
b0284de0 | 1722 | di->bm->interval_not_charging * HZ); |
1668f811 AM |
1723 | } |
1724 | ||
1725 | /** | |
1726 | * abx500_chargalg_wd_work() - periodic work to kick the charger watchdog | |
1727 | * @work: pointer to the work_struct structure | |
1728 | * | |
1729 | * Work queue function for kicking the charger watchdog | |
1730 | */ | |
1731 | static void abx500_chargalg_wd_work(struct work_struct *work) | |
1732 | { | |
1733 | int ret; | |
1734 | struct abx500_chargalg *di = container_of(work, | |
1735 | struct abx500_chargalg, chargalg_wd_work.work); | |
1736 | ||
1737 | dev_dbg(di->dev, "abx500_chargalg_wd_work\n"); | |
1738 | ||
1739 | ret = abx500_chargalg_kick_watchdog(di); | |
1740 | if (ret < 0) | |
1741 | dev_err(di->dev, "failed to kick watchdog\n"); | |
1742 | ||
1743 | queue_delayed_work(di->chargalg_wq, | |
1744 | &di->chargalg_wd_work, CHG_WD_INTERVAL); | |
1745 | } | |
1746 | ||
1747 | /** | |
1748 | * abx500_chargalg_work() - Work to run the charging algorithm instantly | |
1749 | * @work: pointer to the work_struct structure | |
1750 | * | |
1751 | * Work queue function for calling the charging algorithm | |
1752 | */ | |
1753 | static void abx500_chargalg_work(struct work_struct *work) | |
1754 | { | |
1755 | struct abx500_chargalg *di = container_of(work, | |
1756 | struct abx500_chargalg, chargalg_work); | |
1757 | ||
1758 | abx500_chargalg_algorithm(di); | |
1759 | } | |
1760 | ||
1761 | /** | |
1762 | * abx500_chargalg_get_property() - get the chargalg properties | |
1763 | * @psy: pointer to the power_supply structure | |
1764 | * @psp: pointer to the power_supply_property structure | |
1765 | * @val: pointer to the power_supply_propval union | |
1766 | * | |
1767 | * This function gets called when an application tries to get the | |
1768 | * chargalg properties by reading the sysfs files. | |
1769 | * status: charging/discharging/full/unknown | |
1770 | * health: health of the battery | |
1771 | * Returns error code in case of failure else 0 on success | |
1772 | */ | |
1773 | static int abx500_chargalg_get_property(struct power_supply *psy, | |
1774 | enum power_supply_property psp, | |
1775 | union power_supply_propval *val) | |
1776 | { | |
297d716f | 1777 | struct abx500_chargalg *di = power_supply_get_drvdata(psy); |
1668f811 AM |
1778 | |
1779 | switch (psp) { | |
1780 | case POWER_SUPPLY_PROP_STATUS: | |
1781 | val->intval = di->charge_status; | |
1782 | break; | |
1783 | case POWER_SUPPLY_PROP_HEALTH: | |
1784 | if (di->events.batt_ovv) { | |
1785 | val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; | |
1786 | } else if (di->events.btemp_underover) { | |
b0284de0 | 1787 | if (di->batt_data.temp <= di->bm->temp_under) |
1668f811 AM |
1788 | val->intval = POWER_SUPPLY_HEALTH_COLD; |
1789 | else | |
1790 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
d80108fc LJ |
1791 | } else if (di->charge_state == STATE_SAFETY_TIMER_EXPIRED || |
1792 | di->charge_state == STATE_SAFETY_TIMER_EXPIRED_INIT) { | |
1793 | val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; | |
1668f811 AM |
1794 | } else { |
1795 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
1796 | } | |
1797 | break; | |
1798 | default: | |
1799 | return -EINVAL; | |
1800 | } | |
1801 | return 0; | |
1802 | } | |
1803 | ||
1804 | /* Exposure to the sysfs interface */ | |
1805 | ||
4d3b4aa5 LJ |
1806 | static ssize_t abx500_chargalg_curr_step_show(struct abx500_chargalg *di, |
1807 | char *buf) | |
c9ade0fc | 1808 | { |
4d3b4aa5 LJ |
1809 | return sprintf(buf, "%d\n", di->curr_status.curr_step); |
1810 | } | |
1811 | ||
1812 | static ssize_t abx500_chargalg_curr_step_store(struct abx500_chargalg *di, | |
1813 | const char *buf, size_t length) | |
1814 | { | |
1815 | long int param; | |
1816 | int ret; | |
1817 | ||
1818 | ret = kstrtol(buf, 10, ¶m); | |
1819 | if (ret < 0) | |
1820 | return ret; | |
c9ade0fc | 1821 | |
4d3b4aa5 LJ |
1822 | di->curr_status.curr_step = param; |
1823 | if (di->curr_status.curr_step >= CHARGALG_CURR_STEP_LOW && | |
1824 | di->curr_status.curr_step <= CHARGALG_CURR_STEP_HIGH) { | |
1825 | di->curr_status.curr_step_change = true; | |
1826 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
1827 | } else | |
1828 | dev_info(di->dev, "Wrong current step\n" | |
1829 | "Enter 0. Disable AC/USB Charging\n" | |
1830 | "1--100. Set AC/USB charging current step\n" | |
1831 | "100. Enable AC/USB Charging\n"); | |
1832 | ||
1833 | return strlen(buf); | |
1834 | } | |
1835 | ||
1836 | ||
1837 | static ssize_t abx500_chargalg_en_show(struct abx500_chargalg *di, | |
1838 | char *buf) | |
1839 | { | |
c9ade0fc LJ |
1840 | return sprintf(buf, "%d\n", |
1841 | di->susp_status.ac_suspended && | |
1842 | di->susp_status.usb_suspended); | |
1843 | } | |
1844 | ||
4d3b4aa5 LJ |
1845 | static ssize_t abx500_chargalg_en_store(struct abx500_chargalg *di, |
1846 | const char *buf, size_t length) | |
1668f811 | 1847 | { |
1668f811 AM |
1848 | long int param; |
1849 | int ac_usb; | |
1850 | int ret; | |
1668f811 | 1851 | |
4d3b4aa5 LJ |
1852 | ret = kstrtol(buf, 10, ¶m); |
1853 | if (ret < 0) | |
1854 | return ret; | |
1855 | ||
1856 | ac_usb = param; | |
1857 | switch (ac_usb) { | |
1858 | case 0: | |
1859 | /* Disable charging */ | |
1860 | di->susp_status.ac_suspended = true; | |
1861 | di->susp_status.usb_suspended = true; | |
1862 | di->susp_status.suspended_change = true; | |
1863 | /* Trigger a state change */ | |
1864 | queue_work(di->chargalg_wq, | |
1865 | &di->chargalg_work); | |
1866 | break; | |
1867 | case 1: | |
1868 | /* Enable AC Charging */ | |
1869 | di->susp_status.ac_suspended = false; | |
1870 | di->susp_status.suspended_change = true; | |
1871 | /* Trigger a state change */ | |
1872 | queue_work(di->chargalg_wq, | |
1873 | &di->chargalg_work); | |
1668f811 | 1874 | break; |
4d3b4aa5 LJ |
1875 | case 2: |
1876 | /* Enable USB charging */ | |
1877 | di->susp_status.usb_suspended = false; | |
1878 | di->susp_status.suspended_change = true; | |
1879 | /* Trigger a state change */ | |
1880 | queue_work(di->chargalg_wq, | |
1881 | &di->chargalg_work); | |
1882 | break; | |
1883 | default: | |
1884 | dev_info(di->dev, "Wrong input\n" | |
1885 | "Enter 0. Disable AC/USB Charging\n" | |
1886 | "1. Enable AC charging\n" | |
1887 | "2. Enable USB Charging\n"); | |
1668f811 AM |
1888 | }; |
1889 | return strlen(buf); | |
1890 | } | |
1891 | ||
4d3b4aa5 LJ |
1892 | static struct abx500_chargalg_sysfs_entry abx500_chargalg_en_charger = |
1893 | __ATTR(chargalg, 0644, abx500_chargalg_en_show, | |
1894 | abx500_chargalg_en_store); | |
1895 | ||
1896 | static struct abx500_chargalg_sysfs_entry abx500_chargalg_curr_step = | |
1897 | __ATTR(chargalg_curr_step, 0644, abx500_chargalg_curr_step_show, | |
1898 | abx500_chargalg_curr_step_store); | |
1899 | ||
1900 | static ssize_t abx500_chargalg_sysfs_show(struct kobject *kobj, | |
1901 | struct attribute *attr, char *buf) | |
1902 | { | |
1903 | struct abx500_chargalg_sysfs_entry *entry = container_of(attr, | |
1904 | struct abx500_chargalg_sysfs_entry, attr); | |
1905 | ||
1906 | struct abx500_chargalg *di = container_of(kobj, | |
1907 | struct abx500_chargalg, chargalg_kobject); | |
1908 | ||
1909 | if (!entry->show) | |
1910 | return -EIO; | |
1911 | ||
1912 | return entry->show(di, buf); | |
1913 | } | |
1914 | ||
1915 | static ssize_t abx500_chargalg_sysfs_charger(struct kobject *kobj, | |
1916 | struct attribute *attr, const char *buf, size_t length) | |
1668f811 | 1917 | { |
4d3b4aa5 LJ |
1918 | struct abx500_chargalg_sysfs_entry *entry = container_of(attr, |
1919 | struct abx500_chargalg_sysfs_entry, attr); | |
1920 | ||
1921 | struct abx500_chargalg *di = container_of(kobj, | |
1922 | struct abx500_chargalg, chargalg_kobject); | |
1923 | ||
1924 | if (!entry->store) | |
1925 | return -EIO; | |
1926 | ||
1927 | return entry->store(di, buf, length); | |
1928 | } | |
1668f811 AM |
1929 | |
1930 | static struct attribute *abx500_chargalg_chg[] = { | |
4d3b4aa5 LJ |
1931 | &abx500_chargalg_en_charger.attr, |
1932 | &abx500_chargalg_curr_step.attr, | |
1933 | NULL, | |
1668f811 AM |
1934 | }; |
1935 | ||
64eb9b02 | 1936 | static const struct sysfs_ops abx500_chargalg_sysfs_ops = { |
c9ade0fc | 1937 | .show = abx500_chargalg_sysfs_show, |
1668f811 AM |
1938 | .store = abx500_chargalg_sysfs_charger, |
1939 | }; | |
1940 | ||
1941 | static struct kobj_type abx500_chargalg_ktype = { | |
1942 | .sysfs_ops = &abx500_chargalg_sysfs_ops, | |
1943 | .default_attrs = abx500_chargalg_chg, | |
1944 | }; | |
1945 | ||
1946 | /** | |
1947 | * abx500_chargalg_sysfs_exit() - de-init of sysfs entry | |
1948 | * @di: pointer to the struct abx500_chargalg | |
1949 | * | |
1950 | * This function removes the entry in sysfs. | |
1951 | */ | |
1952 | static void abx500_chargalg_sysfs_exit(struct abx500_chargalg *di) | |
1953 | { | |
1954 | kobject_del(&di->chargalg_kobject); | |
1955 | } | |
1956 | ||
1957 | /** | |
1958 | * abx500_chargalg_sysfs_init() - init of sysfs entry | |
1959 | * @di: pointer to the struct abx500_chargalg | |
1960 | * | |
1961 | * This function adds an entry in sysfs. | |
1962 | * Returns error code in case of failure else 0(on success) | |
1963 | */ | |
1964 | static int abx500_chargalg_sysfs_init(struct abx500_chargalg *di) | |
1965 | { | |
1966 | int ret = 0; | |
1967 | ||
1968 | ret = kobject_init_and_add(&di->chargalg_kobject, | |
1969 | &abx500_chargalg_ktype, | |
1970 | NULL, "abx500_chargalg"); | |
1971 | if (ret < 0) | |
1972 | dev_err(di->dev, "failed to create sysfs entry\n"); | |
1973 | ||
1974 | return ret; | |
1975 | } | |
1976 | /* Exposure to the sysfs interface <<END>> */ | |
1977 | ||
1978 | #if defined(CONFIG_PM) | |
1979 | static int abx500_chargalg_resume(struct platform_device *pdev) | |
1980 | { | |
1981 | struct abx500_chargalg *di = platform_get_drvdata(pdev); | |
1982 | ||
1983 | /* Kick charger watchdog if charging (any charger online) */ | |
1984 | if (di->chg_info.online_chg) | |
1985 | queue_delayed_work(di->chargalg_wq, &di->chargalg_wd_work, 0); | |
1986 | ||
1987 | /* | |
1988 | * Run the charging algorithm directly to be sure we don't | |
1989 | * do it too seldom | |
1990 | */ | |
1991 | queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0); | |
1992 | ||
1993 | return 0; | |
1994 | } | |
1995 | ||
1996 | static int abx500_chargalg_suspend(struct platform_device *pdev, | |
1997 | pm_message_t state) | |
1998 | { | |
1999 | struct abx500_chargalg *di = platform_get_drvdata(pdev); | |
2000 | ||
2001 | if (di->chg_info.online_chg) | |
2002 | cancel_delayed_work_sync(&di->chargalg_wd_work); | |
2003 | ||
2004 | cancel_delayed_work_sync(&di->chargalg_periodic_work); | |
2005 | ||
2006 | return 0; | |
2007 | } | |
2008 | #else | |
2009 | #define abx500_chargalg_suspend NULL | |
2010 | #define abx500_chargalg_resume NULL | |
2011 | #endif | |
2012 | ||
415ec69f | 2013 | static int abx500_chargalg_remove(struct platform_device *pdev) |
1668f811 AM |
2014 | { |
2015 | struct abx500_chargalg *di = platform_get_drvdata(pdev); | |
2016 | ||
2017 | /* sysfs interface to enable/disbale charging from user space */ | |
2018 | abx500_chargalg_sysfs_exit(di); | |
2019 | ||
257107ae LJ |
2020 | hrtimer_cancel(&di->safety_timer); |
2021 | hrtimer_cancel(&di->maintenance_timer); | |
2022 | ||
2023 | cancel_delayed_work_sync(&di->chargalg_periodic_work); | |
2024 | cancel_delayed_work_sync(&di->chargalg_wd_work); | |
2025 | cancel_work_sync(&di->chargalg_work); | |
2026 | ||
1668f811 AM |
2027 | /* Delete the work queue */ |
2028 | destroy_workqueue(di->chargalg_wq); | |
2029 | ||
297d716f | 2030 | power_supply_unregister(di->chargalg_psy); |
1668f811 AM |
2031 | |
2032 | return 0; | |
2033 | } | |
2034 | ||
a12810ab R |
2035 | static char *supply_interface[] = { |
2036 | "ab8500_fg", | |
2037 | }; | |
2038 | ||
297d716f KK |
2039 | static const struct power_supply_desc abx500_chargalg_desc = { |
2040 | .name = "abx500_chargalg", | |
2041 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
2042 | .properties = abx500_chargalg_props, | |
2043 | .num_properties = ARRAY_SIZE(abx500_chargalg_props), | |
2044 | .get_property = abx500_chargalg_get_property, | |
2045 | .external_power_changed = abx500_chargalg_external_power_changed, | |
2046 | }; | |
2047 | ||
c8afa640 | 2048 | static int abx500_chargalg_probe(struct platform_device *pdev) |
1668f811 | 2049 | { |
a12810ab | 2050 | struct device_node *np = pdev->dev.of_node; |
bdc56b44 | 2051 | struct abx500_bm_data *plat = pdev->dev.platform_data; |
2dc9215d | 2052 | struct power_supply_config psy_cfg = {}; |
a12810ab | 2053 | struct abx500_chargalg *di; |
1668f811 AM |
2054 | int ret = 0; |
2055 | ||
a12810ab R |
2056 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
2057 | if (!di) { | |
2058 | dev_err(&pdev->dev, "%s no mem for ab8500_chargalg\n", __func__); | |
1668f811 | 2059 | return -ENOMEM; |
a12810ab | 2060 | } |
bdc56b44 LJ |
2061 | |
2062 | if (!plat) { | |
2063 | dev_err(&pdev->dev, "no battery management data supplied\n"); | |
2064 | return -EINVAL; | |
2065 | } | |
2066 | di->bm = plat; | |
2067 | ||
2068 | if (np) { | |
2069 | ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm); | |
2070 | if (ret) { | |
2071 | dev_err(&pdev->dev, "failed to get battery information\n"); | |
2072 | return ret; | |
a12810ab | 2073 | } |
a12810ab | 2074 | } |
1668f811 | 2075 | |
330b7ebf | 2076 | /* get device struct and parent */ |
1668f811 | 2077 | di->dev = &pdev->dev; |
330b7ebf | 2078 | di->parent = dev_get_drvdata(pdev->dev.parent); |
1668f811 | 2079 | |
2dc9215d KK |
2080 | psy_cfg.supplied_to = supply_interface; |
2081 | psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); | |
297d716f | 2082 | psy_cfg.drv_data = di; |
2dc9215d | 2083 | |
1668f811 | 2084 | /* Initilialize safety timer */ |
257107ae | 2085 | hrtimer_init(&di->safety_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
1668f811 | 2086 | di->safety_timer.function = abx500_chargalg_safety_timer_expired; |
1668f811 AM |
2087 | |
2088 | /* Initilialize maintenance timer */ | |
257107ae | 2089 | hrtimer_init(&di->maintenance_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
1668f811 AM |
2090 | di->maintenance_timer.function = |
2091 | abx500_chargalg_maintenance_timer_expired; | |
1668f811 AM |
2092 | |
2093 | /* Create a work queue for the chargalg */ | |
2094 | di->chargalg_wq = | |
2095 | create_singlethread_workqueue("abx500_chargalg_wq"); | |
2096 | if (di->chargalg_wq == NULL) { | |
2097 | dev_err(di->dev, "failed to create work queue\n"); | |
a12810ab | 2098 | return -ENOMEM; |
1668f811 AM |
2099 | } |
2100 | ||
2101 | /* Init work for chargalg */ | |
203b42f7 | 2102 | INIT_DEFERRABLE_WORK(&di->chargalg_periodic_work, |
1668f811 | 2103 | abx500_chargalg_periodic_work); |
203b42f7 | 2104 | INIT_DEFERRABLE_WORK(&di->chargalg_wd_work, |
1668f811 AM |
2105 | abx500_chargalg_wd_work); |
2106 | ||
2107 | /* Init work for chargalg */ | |
2108 | INIT_WORK(&di->chargalg_work, abx500_chargalg_work); | |
2109 | ||
2110 | /* To detect charger at startup */ | |
2111 | di->chg_info.prev_conn_chg = -1; | |
2112 | ||
2113 | /* Register chargalg power supply class */ | |
297d716f KK |
2114 | di->chargalg_psy = power_supply_register(di->dev, &abx500_chargalg_desc, |
2115 | &psy_cfg); | |
2116 | if (IS_ERR(di->chargalg_psy)) { | |
1668f811 | 2117 | dev_err(di->dev, "failed to register chargalg psy\n"); |
297d716f | 2118 | ret = PTR_ERR(di->chargalg_psy); |
1668f811 AM |
2119 | goto free_chargalg_wq; |
2120 | } | |
2121 | ||
2122 | platform_set_drvdata(pdev, di); | |
2123 | ||
2124 | /* sysfs interface to enable/disable charging from user space */ | |
2125 | ret = abx500_chargalg_sysfs_init(di); | |
2126 | if (ret) { | |
2127 | dev_err(di->dev, "failed to create sysfs entry\n"); | |
2128 | goto free_psy; | |
2129 | } | |
4d3b4aa5 | 2130 | di->curr_status.curr_step = CHARGALG_CURR_STEP_HIGH; |
1668f811 AM |
2131 | |
2132 | /* Run the charging algorithm */ | |
2133 | queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0); | |
2134 | ||
2135 | dev_info(di->dev, "probe success\n"); | |
2136 | return ret; | |
2137 | ||
2138 | free_psy: | |
297d716f | 2139 | power_supply_unregister(di->chargalg_psy); |
1668f811 AM |
2140 | free_chargalg_wq: |
2141 | destroy_workqueue(di->chargalg_wq); | |
1668f811 AM |
2142 | return ret; |
2143 | } | |
2144 | ||
a12810ab R |
2145 | static const struct of_device_id ab8500_chargalg_match[] = { |
2146 | { .compatible = "stericsson,ab8500-chargalg", }, | |
2147 | { }, | |
2148 | }; | |
2149 | ||
1668f811 AM |
2150 | static struct platform_driver abx500_chargalg_driver = { |
2151 | .probe = abx500_chargalg_probe, | |
28ea73f4 | 2152 | .remove = abx500_chargalg_remove, |
1668f811 AM |
2153 | .suspend = abx500_chargalg_suspend, |
2154 | .resume = abx500_chargalg_resume, | |
2155 | .driver = { | |
a12810ab | 2156 | .name = "ab8500-chargalg", |
a12810ab | 2157 | .of_match_table = ab8500_chargalg_match, |
1668f811 AM |
2158 | }, |
2159 | }; | |
2160 | ||
1ee26af0 | 2161 | module_platform_driver(abx500_chargalg_driver); |
1668f811 AM |
2162 | |
2163 | MODULE_LICENSE("GPL v2"); | |
2164 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski"); | |
2165 | MODULE_ALIAS("platform:abx500-chargalg"); | |
2166 | MODULE_DESCRIPTION("abx500 battery charging algorithm"); |