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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 | #define to_abx500_chargalg_device_info(x) container_of((x), \ |
54 | struct abx500_chargalg, chargalg_psy); | |
55 | ||
56 | enum abx500_chargers { | |
57 | NO_CHG, | |
58 | AC_CHG, | |
59 | USB_CHG, | |
60 | }; | |
61 | ||
62 | struct abx500_chargalg_charger_info { | |
63 | enum abx500_chargers conn_chg; | |
64 | enum abx500_chargers prev_conn_chg; | |
65 | enum abx500_chargers online_chg; | |
66 | enum abx500_chargers prev_online_chg; | |
67 | enum abx500_chargers charger_type; | |
68 | bool usb_chg_ok; | |
69 | bool ac_chg_ok; | |
70 | int usb_volt; | |
71 | int usb_curr; | |
72 | int ac_volt; | |
73 | int ac_curr; | |
74 | int usb_vset; | |
75 | int usb_iset; | |
76 | int ac_vset; | |
77 | int ac_iset; | |
78 | }; | |
79 | ||
80 | struct abx500_chargalg_suspension_status { | |
81 | bool suspended_change; | |
82 | bool ac_suspended; | |
83 | bool usb_suspended; | |
84 | }; | |
85 | ||
4d3b4aa5 LJ |
86 | struct abx500_chargalg_current_step_status { |
87 | bool curr_step_change; | |
88 | int curr_step; | |
89 | }; | |
90 | ||
1668f811 AM |
91 | struct abx500_chargalg_battery_data { |
92 | int temp; | |
93 | int volt; | |
94 | int avg_curr; | |
95 | int inst_curr; | |
96 | int percent; | |
97 | }; | |
98 | ||
99 | enum abx500_chargalg_states { | |
100 | STATE_HANDHELD_INIT, | |
101 | STATE_HANDHELD, | |
102 | STATE_CHG_NOT_OK_INIT, | |
103 | STATE_CHG_NOT_OK, | |
104 | STATE_HW_TEMP_PROTECT_INIT, | |
105 | STATE_HW_TEMP_PROTECT, | |
106 | STATE_NORMAL_INIT, | |
db43e6c4 | 107 | STATE_USB_PP_PRE_CHARGE, |
1668f811 AM |
108 | STATE_NORMAL, |
109 | STATE_WAIT_FOR_RECHARGE_INIT, | |
110 | STATE_WAIT_FOR_RECHARGE, | |
111 | STATE_MAINTENANCE_A_INIT, | |
112 | STATE_MAINTENANCE_A, | |
113 | STATE_MAINTENANCE_B_INIT, | |
114 | STATE_MAINTENANCE_B, | |
115 | STATE_TEMP_UNDEROVER_INIT, | |
116 | STATE_TEMP_UNDEROVER, | |
117 | STATE_TEMP_LOWHIGH_INIT, | |
118 | STATE_TEMP_LOWHIGH, | |
119 | STATE_SUSPENDED_INIT, | |
120 | STATE_SUSPENDED, | |
121 | STATE_OVV_PROTECT_INIT, | |
122 | STATE_OVV_PROTECT, | |
123 | STATE_SAFETY_TIMER_EXPIRED_INIT, | |
124 | STATE_SAFETY_TIMER_EXPIRED, | |
125 | STATE_BATT_REMOVED_INIT, | |
126 | STATE_BATT_REMOVED, | |
127 | STATE_WD_EXPIRED_INIT, | |
128 | STATE_WD_EXPIRED, | |
129 | }; | |
130 | ||
131 | static const char *states[] = { | |
132 | "HANDHELD_INIT", | |
133 | "HANDHELD", | |
134 | "CHG_NOT_OK_INIT", | |
135 | "CHG_NOT_OK", | |
136 | "HW_TEMP_PROTECT_INIT", | |
137 | "HW_TEMP_PROTECT", | |
138 | "NORMAL_INIT", | |
db43e6c4 | 139 | "USB_PP_PRE_CHARGE", |
1668f811 AM |
140 | "NORMAL", |
141 | "WAIT_FOR_RECHARGE_INIT", | |
142 | "WAIT_FOR_RECHARGE", | |
143 | "MAINTENANCE_A_INIT", | |
144 | "MAINTENANCE_A", | |
145 | "MAINTENANCE_B_INIT", | |
146 | "MAINTENANCE_B", | |
147 | "TEMP_UNDEROVER_INIT", | |
148 | "TEMP_UNDEROVER", | |
149 | "TEMP_LOWHIGH_INIT", | |
150 | "TEMP_LOWHIGH", | |
151 | "SUSPENDED_INIT", | |
152 | "SUSPENDED", | |
153 | "OVV_PROTECT_INIT", | |
154 | "OVV_PROTECT", | |
155 | "SAFETY_TIMER_EXPIRED_INIT", | |
156 | "SAFETY_TIMER_EXPIRED", | |
157 | "BATT_REMOVED_INIT", | |
158 | "BATT_REMOVED", | |
159 | "WD_EXPIRED_INIT", | |
160 | "WD_EXPIRED", | |
161 | }; | |
162 | ||
163 | struct abx500_chargalg_events { | |
164 | bool batt_unknown; | |
165 | bool mainextchnotok; | |
166 | bool batt_ovv; | |
167 | bool batt_rem; | |
168 | bool btemp_underover; | |
169 | bool btemp_lowhigh; | |
170 | bool main_thermal_prot; | |
171 | bool usb_thermal_prot; | |
172 | bool main_ovv; | |
173 | bool vbus_ovv; | |
174 | bool usbchargernotok; | |
175 | bool safety_timer_expired; | |
176 | bool maintenance_timer_expired; | |
177 | bool ac_wd_expired; | |
178 | bool usb_wd_expired; | |
179 | bool ac_cv_active; | |
180 | bool usb_cv_active; | |
181 | bool vbus_collapsed; | |
182 | }; | |
183 | ||
184 | /** | |
185 | * struct abx500_charge_curr_maximization - Charger maximization parameters | |
186 | * @original_iset: the non optimized/maximised charger current | |
187 | * @current_iset: the charging current used at this moment | |
188 | * @test_delta_i: the delta between the current we want to charge and the | |
189 | current that is really going into the battery | |
190 | * @condition_cnt: number of iterations needed before a new charger current | |
191 | is set | |
192 | * @max_current: maximum charger current | |
193 | * @wait_cnt: to avoid too fast current step down in case of charger | |
194 | * voltage collapse, we insert this delay between step | |
195 | * down | |
196 | * @level: tells in how many steps the charging current has been | |
197 | increased | |
198 | */ | |
199 | struct abx500_charge_curr_maximization { | |
200 | int original_iset; | |
201 | int current_iset; | |
202 | int test_delta_i; | |
203 | int condition_cnt; | |
204 | int max_current; | |
205 | int wait_cnt; | |
206 | u8 level; | |
207 | }; | |
208 | ||
209 | enum maxim_ret { | |
210 | MAXIM_RET_NOACTION, | |
211 | MAXIM_RET_CHANGE, | |
212 | MAXIM_RET_IBAT_TOO_HIGH, | |
213 | }; | |
214 | ||
215 | /** | |
216 | * struct abx500_chargalg - abx500 Charging algorithm device information | |
217 | * @dev: pointer to the structure device | |
218 | * @charge_status: battery operating status | |
219 | * @eoc_cnt: counter used to determine end-of_charge | |
1668f811 AM |
220 | * @maintenance_chg: indicate if maintenance charge is active |
221 | * @t_hyst_norm temperature hysteresis when the temperature has been | |
222 | * over or under normal limits | |
223 | * @t_hyst_lowhigh temperature hysteresis when the temperature has been | |
224 | * over or under the high or low limits | |
225 | * @charge_state: current state of the charging algorithm | |
226 | * @ccm charging current maximization parameters | |
227 | * @chg_info: information about connected charger types | |
228 | * @batt_data: data of the battery | |
229 | * @susp_status: current charger suspension status | |
b0284de0 | 230 | * @bm: Platform specific battery management information |
4d3b4aa5 | 231 | * @curr_status: Current step status for over-current protection |
330b7ebf | 232 | * @parent: pointer to the struct abx500 |
1668f811 AM |
233 | * @chargalg_psy: structure that holds the battery properties exposed by |
234 | * the charging algorithm | |
235 | * @events: structure for information about events triggered | |
236 | * @chargalg_wq: work queue for running the charging algorithm | |
237 | * @chargalg_periodic_work: work to run the charging algorithm periodically | |
238 | * @chargalg_wd_work: work to kick the charger watchdog periodically | |
239 | * @chargalg_work: work to run the charging algorithm instantly | |
240 | * @safety_timer: charging safety timer | |
241 | * @maintenance_timer: maintenance charging timer | |
242 | * @chargalg_kobject: structure of type kobject | |
243 | */ | |
244 | struct abx500_chargalg { | |
245 | struct device *dev; | |
246 | int charge_status; | |
247 | int eoc_cnt; | |
1668f811 AM |
248 | bool maintenance_chg; |
249 | int t_hyst_norm; | |
250 | int t_hyst_lowhigh; | |
251 | enum abx500_chargalg_states charge_state; | |
252 | struct abx500_charge_curr_maximization ccm; | |
253 | struct abx500_chargalg_charger_info chg_info; | |
254 | struct abx500_chargalg_battery_data batt_data; | |
255 | struct abx500_chargalg_suspension_status susp_status; | |
330b7ebf | 256 | struct ab8500 *parent; |
4d3b4aa5 | 257 | struct abx500_chargalg_current_step_status curr_status; |
b0284de0 | 258 | struct abx500_bm_data *bm; |
1668f811 AM |
259 | struct power_supply chargalg_psy; |
260 | struct ux500_charger *ac_chg; | |
261 | struct ux500_charger *usb_chg; | |
262 | struct abx500_chargalg_events events; | |
263 | struct workqueue_struct *chargalg_wq; | |
264 | struct delayed_work chargalg_periodic_work; | |
265 | struct delayed_work chargalg_wd_work; | |
266 | struct work_struct chargalg_work; | |
257107ae LJ |
267 | struct hrtimer safety_timer; |
268 | struct hrtimer maintenance_timer; | |
1668f811 AM |
269 | struct kobject chargalg_kobject; |
270 | }; | |
271 | ||
8891716e LJ |
272 | /*External charger prepare notifier*/ |
273 | BLOCKING_NOTIFIER_HEAD(charger_notifier_list); | |
274 | ||
1668f811 AM |
275 | /* Main battery properties */ |
276 | static enum power_supply_property abx500_chargalg_props[] = { | |
277 | POWER_SUPPLY_PROP_STATUS, | |
278 | POWER_SUPPLY_PROP_HEALTH, | |
279 | }; | |
280 | ||
4d3b4aa5 LJ |
281 | struct abx500_chargalg_sysfs_entry { |
282 | struct attribute attr; | |
283 | ssize_t (*show)(struct abx500_chargalg *, char *); | |
284 | ssize_t (*store)(struct abx500_chargalg *, const char *, size_t); | |
285 | }; | |
286 | ||
1668f811 AM |
287 | /** |
288 | * abx500_chargalg_safety_timer_expired() - Expiration of the safety timer | |
257107ae | 289 | * @timer: pointer to the hrtimer structure |
1668f811 AM |
290 | * |
291 | * This function gets called when the safety timer for the charger | |
292 | * expires | |
293 | */ | |
257107ae LJ |
294 | static enum hrtimer_restart |
295 | abx500_chargalg_safety_timer_expired(struct hrtimer *timer) | |
1668f811 | 296 | { |
257107ae LJ |
297 | struct abx500_chargalg *di = container_of(timer, struct abx500_chargalg, |
298 | safety_timer); | |
1668f811 AM |
299 | dev_err(di->dev, "Safety timer expired\n"); |
300 | di->events.safety_timer_expired = true; | |
301 | ||
302 | /* Trigger execution of the algorithm instantly */ | |
303 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
257107ae LJ |
304 | |
305 | return HRTIMER_NORESTART; | |
1668f811 AM |
306 | } |
307 | ||
308 | /** | |
309 | * abx500_chargalg_maintenance_timer_expired() - Expiration of | |
310 | * the maintenance timer | |
257107ae | 311 | * @timer: pointer to the timer structure |
1668f811 AM |
312 | * |
313 | * This function gets called when the maintenence timer | |
314 | * expires | |
315 | */ | |
257107ae LJ |
316 | static enum hrtimer_restart |
317 | abx500_chargalg_maintenance_timer_expired(struct hrtimer *timer) | |
1668f811 AM |
318 | { |
319 | ||
257107ae LJ |
320 | struct abx500_chargalg *di = container_of(timer, struct abx500_chargalg, |
321 | maintenance_timer); | |
322 | ||
1668f811 AM |
323 | dev_dbg(di->dev, "Maintenance timer expired\n"); |
324 | di->events.maintenance_timer_expired = true; | |
325 | ||
326 | /* Trigger execution of the algorithm instantly */ | |
327 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
257107ae LJ |
328 | |
329 | return HRTIMER_NORESTART; | |
1668f811 AM |
330 | } |
331 | ||
332 | /** | |
333 | * abx500_chargalg_state_to() - Change charge state | |
334 | * @di: pointer to the abx500_chargalg structure | |
335 | * | |
336 | * This function gets called when a charge state change should occur | |
337 | */ | |
338 | static void abx500_chargalg_state_to(struct abx500_chargalg *di, | |
339 | enum abx500_chargalg_states state) | |
340 | { | |
341 | dev_dbg(di->dev, | |
342 | "State changed: %s (From state: [%d] %s =to=> [%d] %s )\n", | |
343 | di->charge_state == state ? "NO" : "YES", | |
344 | di->charge_state, | |
345 | states[di->charge_state], | |
346 | state, | |
347 | states[state]); | |
348 | ||
349 | di->charge_state = state; | |
350 | } | |
351 | ||
4dcdf577 LJ |
352 | static int abx500_chargalg_check_charger_enable(struct abx500_chargalg *di) |
353 | { | |
354 | switch (di->charge_state) { | |
355 | case STATE_NORMAL: | |
356 | case STATE_MAINTENANCE_A: | |
357 | case STATE_MAINTENANCE_B: | |
358 | break; | |
359 | default: | |
360 | return 0; | |
361 | } | |
362 | ||
363 | if (di->chg_info.charger_type & USB_CHG) { | |
364 | return di->usb_chg->ops.check_enable(di->usb_chg, | |
365 | di->bm->bat_type[di->bm->batt_id].normal_vol_lvl, | |
366 | di->bm->bat_type[di->bm->batt_id].normal_cur_lvl); | |
367 | } else if ((di->chg_info.charger_type & AC_CHG) && | |
368 | !(di->ac_chg->external)) { | |
369 | return di->ac_chg->ops.check_enable(di->ac_chg, | |
370 | di->bm->bat_type[di->bm->batt_id].normal_vol_lvl, | |
371 | di->bm->bat_type[di->bm->batt_id].normal_cur_lvl); | |
372 | } | |
373 | return 0; | |
374 | } | |
375 | ||
1668f811 AM |
376 | /** |
377 | * abx500_chargalg_check_charger_connection() - Check charger connection change | |
378 | * @di: pointer to the abx500_chargalg structure | |
379 | * | |
380 | * This function will check if there is a change in the charger connection | |
381 | * and change charge state accordingly. AC has precedence over USB. | |
382 | */ | |
383 | static int abx500_chargalg_check_charger_connection(struct abx500_chargalg *di) | |
384 | { | |
385 | if (di->chg_info.conn_chg != di->chg_info.prev_conn_chg || | |
386 | di->susp_status.suspended_change) { | |
387 | /* | |
388 | * Charger state changed or suspension | |
389 | * has changed since last update | |
390 | */ | |
391 | if ((di->chg_info.conn_chg & AC_CHG) && | |
392 | !di->susp_status.ac_suspended) { | |
393 | dev_dbg(di->dev, "Charging source is AC\n"); | |
394 | if (di->chg_info.charger_type != AC_CHG) { | |
395 | di->chg_info.charger_type = AC_CHG; | |
396 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
397 | } | |
398 | } else if ((di->chg_info.conn_chg & USB_CHG) && | |
399 | !di->susp_status.usb_suspended) { | |
400 | dev_dbg(di->dev, "Charging source is USB\n"); | |
401 | di->chg_info.charger_type = USB_CHG; | |
402 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
403 | } else if (di->chg_info.conn_chg && | |
404 | (di->susp_status.ac_suspended || | |
405 | di->susp_status.usb_suspended)) { | |
406 | dev_dbg(di->dev, "Charging is suspended\n"); | |
407 | di->chg_info.charger_type = NO_CHG; | |
408 | abx500_chargalg_state_to(di, STATE_SUSPENDED_INIT); | |
409 | } else { | |
410 | dev_dbg(di->dev, "Charging source is OFF\n"); | |
411 | di->chg_info.charger_type = NO_CHG; | |
412 | abx500_chargalg_state_to(di, STATE_HANDHELD_INIT); | |
413 | } | |
414 | di->chg_info.prev_conn_chg = di->chg_info.conn_chg; | |
415 | di->susp_status.suspended_change = false; | |
416 | } | |
417 | return di->chg_info.conn_chg; | |
418 | } | |
419 | ||
4d3b4aa5 LJ |
420 | /** |
421 | * abx500_chargalg_check_current_step_status() - Check charging current | |
422 | * step status. | |
423 | * @di: pointer to the abx500_chargalg structure | |
424 | * | |
425 | * This function will check if there is a change in the charging current step | |
426 | * and change charge state accordingly. | |
427 | */ | |
428 | static void abx500_chargalg_check_current_step_status | |
429 | (struct abx500_chargalg *di) | |
430 | { | |
431 | if (di->curr_status.curr_step_change) | |
432 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
433 | di->curr_status.curr_step_change = false; | |
434 | } | |
435 | ||
1668f811 AM |
436 | /** |
437 | * abx500_chargalg_start_safety_timer() - Start charging safety timer | |
438 | * @di: pointer to the abx500_chargalg structure | |
439 | * | |
440 | * The safety timer is used to avoid overcharging of old or bad batteries. | |
441 | * There are different timers for AC and USB | |
442 | */ | |
443 | static void abx500_chargalg_start_safety_timer(struct abx500_chargalg *di) | |
444 | { | |
257107ae LJ |
445 | /* Charger-dependent expiration time in hours*/ |
446 | int timer_expiration = 0; | |
1668f811 AM |
447 | |
448 | switch (di->chg_info.charger_type) { | |
449 | case AC_CHG: | |
257107ae | 450 | timer_expiration = di->bm->main_safety_tmr_h; |
1668f811 AM |
451 | break; |
452 | ||
453 | case USB_CHG: | |
257107ae | 454 | timer_expiration = di->bm->usb_safety_tmr_h; |
1668f811 AM |
455 | break; |
456 | ||
457 | default: | |
458 | dev_err(di->dev, "Unknown charger to charge from\n"); | |
459 | break; | |
460 | } | |
461 | ||
462 | di->events.safety_timer_expired = false; | |
257107ae LJ |
463 | hrtimer_set_expires_range(&di->safety_timer, |
464 | ktime_set(timer_expiration * ONE_HOUR_IN_SECONDS, 0), | |
465 | ktime_set(FIVE_MINUTES_IN_SECONDS, 0)); | |
466 | hrtimer_start_expires(&di->safety_timer, HRTIMER_MODE_REL); | |
1668f811 AM |
467 | } |
468 | ||
469 | /** | |
470 | * abx500_chargalg_stop_safety_timer() - Stop charging safety timer | |
471 | * @di: pointer to the abx500_chargalg structure | |
472 | * | |
473 | * The safety timer is stopped whenever the NORMAL state is exited | |
474 | */ | |
475 | static void abx500_chargalg_stop_safety_timer(struct abx500_chargalg *di) | |
476 | { | |
257107ae LJ |
477 | if (hrtimer_try_to_cancel(&di->safety_timer) >= 0) |
478 | di->events.safety_timer_expired = false; | |
1668f811 AM |
479 | } |
480 | ||
481 | /** | |
482 | * abx500_chargalg_start_maintenance_timer() - Start charging maintenance timer | |
483 | * @di: pointer to the abx500_chargalg structure | |
484 | * @duration: duration of ther maintenance timer in hours | |
485 | * | |
486 | * The maintenance timer is used to maintain the charge in the battery once | |
487 | * the battery is considered full. These timers are chosen to match the | |
488 | * discharge curve of the battery | |
489 | */ | |
490 | static void abx500_chargalg_start_maintenance_timer(struct abx500_chargalg *di, | |
491 | int duration) | |
492 | { | |
257107ae LJ |
493 | hrtimer_set_expires_range(&di->maintenance_timer, |
494 | ktime_set(duration * ONE_HOUR_IN_SECONDS, 0), | |
495 | ktime_set(FIVE_MINUTES_IN_SECONDS, 0)); | |
1668f811 | 496 | di->events.maintenance_timer_expired = false; |
257107ae | 497 | hrtimer_start_expires(&di->maintenance_timer, HRTIMER_MODE_REL); |
1668f811 AM |
498 | } |
499 | ||
500 | /** | |
501 | * abx500_chargalg_stop_maintenance_timer() - Stop maintenance timer | |
502 | * @di: pointer to the abx500_chargalg structure | |
503 | * | |
504 | * The maintenance timer is stopped whenever maintenance ends or when another | |
505 | * state is entered | |
506 | */ | |
507 | static void abx500_chargalg_stop_maintenance_timer(struct abx500_chargalg *di) | |
508 | { | |
257107ae LJ |
509 | if (hrtimer_try_to_cancel(&di->maintenance_timer) >= 0) |
510 | di->events.maintenance_timer_expired = false; | |
1668f811 AM |
511 | } |
512 | ||
513 | /** | |
514 | * abx500_chargalg_kick_watchdog() - Kick charger watchdog | |
515 | * @di: pointer to the abx500_chargalg structure | |
516 | * | |
517 | * The charger watchdog have to be kicked periodically whenever the charger is | |
518 | * on, else the ABB will reset the system | |
519 | */ | |
520 | static int abx500_chargalg_kick_watchdog(struct abx500_chargalg *di) | |
521 | { | |
522 | /* Check if charger exists and kick watchdog if charging */ | |
523 | if (di->ac_chg && di->ac_chg->ops.kick_wd && | |
e07a5645 LP |
524 | di->chg_info.online_chg & AC_CHG) { |
525 | /* | |
526 | * If AB charger watchdog expired, pm2xxx charging | |
527 | * gets disabled. To be safe, kick both AB charger watchdog | |
528 | * and pm2xxx watchdog. | |
529 | */ | |
530 | if (di->ac_chg->external && | |
531 | di->usb_chg && di->usb_chg->ops.kick_wd) | |
532 | di->usb_chg->ops.kick_wd(di->usb_chg); | |
533 | ||
1668f811 | 534 | return di->ac_chg->ops.kick_wd(di->ac_chg); |
e07a5645 | 535 | } |
1668f811 AM |
536 | else if (di->usb_chg && di->usb_chg->ops.kick_wd && |
537 | di->chg_info.online_chg & USB_CHG) | |
538 | return di->usb_chg->ops.kick_wd(di->usb_chg); | |
539 | ||
540 | return -ENXIO; | |
541 | } | |
542 | ||
543 | /** | |
544 | * abx500_chargalg_ac_en() - Turn on/off the AC charger | |
545 | * @di: pointer to the abx500_chargalg structure | |
546 | * @enable: charger on/off | |
547 | * @vset: requested charger output voltage | |
548 | * @iset: requested charger output current | |
549 | * | |
550 | * The AC charger will be turned on/off with the requested charge voltage and | |
551 | * current | |
552 | */ | |
553 | static int abx500_chargalg_ac_en(struct abx500_chargalg *di, int enable, | |
554 | int vset, int iset) | |
555 | { | |
8891716e LJ |
556 | static int abx500_chargalg_ex_ac_enable_toggle; |
557 | ||
1668f811 AM |
558 | if (!di->ac_chg || !di->ac_chg->ops.enable) |
559 | return -ENXIO; | |
560 | ||
561 | /* Select maximum of what both the charger and the battery supports */ | |
562 | if (di->ac_chg->max_out_volt) | |
563 | vset = min(vset, di->ac_chg->max_out_volt); | |
564 | if (di->ac_chg->max_out_curr) | |
565 | iset = min(iset, di->ac_chg->max_out_curr); | |
566 | ||
567 | di->chg_info.ac_iset = iset; | |
568 | di->chg_info.ac_vset = vset; | |
569 | ||
8891716e LJ |
570 | /* Enable external charger */ |
571 | if (enable && di->ac_chg->external && | |
572 | !abx500_chargalg_ex_ac_enable_toggle) { | |
573 | blocking_notifier_call_chain(&charger_notifier_list, | |
574 | 0, di->dev); | |
575 | abx500_chargalg_ex_ac_enable_toggle++; | |
576 | } | |
577 | ||
1668f811 AM |
578 | return di->ac_chg->ops.enable(di->ac_chg, enable, vset, iset); |
579 | } | |
580 | ||
581 | /** | |
582 | * abx500_chargalg_usb_en() - Turn on/off the USB charger | |
583 | * @di: pointer to the abx500_chargalg structure | |
584 | * @enable: charger on/off | |
585 | * @vset: requested charger output voltage | |
586 | * @iset: requested charger output current | |
587 | * | |
588 | * The USB charger will be turned on/off with the requested charge voltage and | |
589 | * current | |
590 | */ | |
591 | static int abx500_chargalg_usb_en(struct abx500_chargalg *di, int enable, | |
592 | int vset, int iset) | |
593 | { | |
594 | if (!di->usb_chg || !di->usb_chg->ops.enable) | |
595 | return -ENXIO; | |
596 | ||
597 | /* Select maximum of what both the charger and the battery supports */ | |
598 | if (di->usb_chg->max_out_volt) | |
599 | vset = min(vset, di->usb_chg->max_out_volt); | |
600 | if (di->usb_chg->max_out_curr) | |
601 | iset = min(iset, di->usb_chg->max_out_curr); | |
602 | ||
603 | di->chg_info.usb_iset = iset; | |
604 | di->chg_info.usb_vset = vset; | |
605 | ||
606 | return di->usb_chg->ops.enable(di->usb_chg, enable, vset, iset); | |
607 | } | |
608 | ||
db43e6c4 LJ |
609 | /** |
610 | * ab8540_chargalg_usb_pp_en() - Enable/ disable USB power path | |
611 | * @di: pointer to the abx500_chargalg structure | |
612 | * @enable: power path enable/disable | |
613 | * | |
614 | * The USB power path will be enable/ disable | |
615 | */ | |
616 | static int ab8540_chargalg_usb_pp_en(struct abx500_chargalg *di, bool enable) | |
617 | { | |
618 | if (!di->usb_chg || !di->usb_chg->ops.pp_enable) | |
619 | return -ENXIO; | |
620 | ||
621 | return di->usb_chg->ops.pp_enable(di->usb_chg, enable); | |
622 | } | |
623 | ||
624 | /** | |
625 | * ab8540_chargalg_usb_pre_chg_en() - Enable/ disable USB pre-charge | |
626 | * @di: pointer to the abx500_chargalg structure | |
627 | * @enable: USB pre-charge enable/disable | |
628 | * | |
629 | * The USB USB pre-charge will be enable/ disable | |
630 | */ | |
631 | static int ab8540_chargalg_usb_pre_chg_en(struct abx500_chargalg *di, | |
632 | bool enable) | |
633 | { | |
634 | if (!di->usb_chg || !di->usb_chg->ops.pre_chg_enable) | |
635 | return -ENXIO; | |
636 | ||
637 | return di->usb_chg->ops.pre_chg_enable(di->usb_chg, enable); | |
638 | } | |
639 | ||
1668f811 AM |
640 | /** |
641 | * abx500_chargalg_update_chg_curr() - Update charger current | |
642 | * @di: pointer to the abx500_chargalg structure | |
643 | * @iset: requested charger output current | |
644 | * | |
645 | * The charger output current will be updated for the charger | |
646 | * that is currently in use | |
647 | */ | |
648 | static int abx500_chargalg_update_chg_curr(struct abx500_chargalg *di, | |
649 | int iset) | |
650 | { | |
651 | /* Check if charger exists and update current if charging */ | |
652 | if (di->ac_chg && di->ac_chg->ops.update_curr && | |
653 | di->chg_info.charger_type & AC_CHG) { | |
654 | /* | |
655 | * Select maximum of what both the charger | |
656 | * and the battery supports | |
657 | */ | |
658 | if (di->ac_chg->max_out_curr) | |
659 | iset = min(iset, di->ac_chg->max_out_curr); | |
660 | ||
661 | di->chg_info.ac_iset = iset; | |
662 | ||
663 | return di->ac_chg->ops.update_curr(di->ac_chg, iset); | |
664 | } else if (di->usb_chg && di->usb_chg->ops.update_curr && | |
665 | di->chg_info.charger_type & USB_CHG) { | |
666 | /* | |
667 | * Select maximum of what both the charger | |
668 | * and the battery supports | |
669 | */ | |
670 | if (di->usb_chg->max_out_curr) | |
671 | iset = min(iset, di->usb_chg->max_out_curr); | |
672 | ||
673 | di->chg_info.usb_iset = iset; | |
674 | ||
675 | return di->usb_chg->ops.update_curr(di->usb_chg, iset); | |
676 | } | |
677 | ||
678 | return -ENXIO; | |
679 | } | |
680 | ||
681 | /** | |
682 | * abx500_chargalg_stop_charging() - Stop charging | |
683 | * @di: pointer to the abx500_chargalg structure | |
684 | * | |
685 | * This function is called from any state where charging should be stopped. | |
686 | * All charging is disabled and all status parameters and timers are changed | |
687 | * accordingly | |
688 | */ | |
689 | static void abx500_chargalg_stop_charging(struct abx500_chargalg *di) | |
690 | { | |
691 | abx500_chargalg_ac_en(di, false, 0, 0); | |
692 | abx500_chargalg_usb_en(di, false, 0, 0); | |
693 | abx500_chargalg_stop_safety_timer(di); | |
694 | abx500_chargalg_stop_maintenance_timer(di); | |
695 | di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
696 | di->maintenance_chg = false; | |
697 | cancel_delayed_work(&di->chargalg_wd_work); | |
698 | power_supply_changed(&di->chargalg_psy); | |
699 | } | |
700 | ||
701 | /** | |
702 | * abx500_chargalg_hold_charging() - Pauses charging | |
703 | * @di: pointer to the abx500_chargalg structure | |
704 | * | |
705 | * This function is called in the case where maintenance charging has been | |
706 | * disabled and instead a battery voltage mode is entered to check when the | |
707 | * battery voltage has reached a certain recharge voltage | |
708 | */ | |
709 | static void abx500_chargalg_hold_charging(struct abx500_chargalg *di) | |
710 | { | |
711 | abx500_chargalg_ac_en(di, false, 0, 0); | |
712 | abx500_chargalg_usb_en(di, false, 0, 0); | |
713 | abx500_chargalg_stop_safety_timer(di); | |
714 | abx500_chargalg_stop_maintenance_timer(di); | |
715 | di->charge_status = POWER_SUPPLY_STATUS_CHARGING; | |
716 | di->maintenance_chg = false; | |
717 | cancel_delayed_work(&di->chargalg_wd_work); | |
718 | power_supply_changed(&di->chargalg_psy); | |
719 | } | |
720 | ||
721 | /** | |
722 | * abx500_chargalg_start_charging() - Start the charger | |
723 | * @di: pointer to the abx500_chargalg structure | |
724 | * @vset: requested charger output voltage | |
725 | * @iset: requested charger output current | |
726 | * | |
727 | * A charger will be enabled depending on the requested charger type that was | |
728 | * detected previously. | |
729 | */ | |
730 | static void abx500_chargalg_start_charging(struct abx500_chargalg *di, | |
731 | int vset, int iset) | |
732 | { | |
733 | switch (di->chg_info.charger_type) { | |
734 | case AC_CHG: | |
735 | dev_dbg(di->dev, | |
736 | "AC parameters: Vset %d, Ich %d\n", vset, iset); | |
737 | abx500_chargalg_usb_en(di, false, 0, 0); | |
738 | abx500_chargalg_ac_en(di, true, vset, iset); | |
739 | break; | |
740 | ||
741 | case USB_CHG: | |
742 | dev_dbg(di->dev, | |
743 | "USB parameters: Vset %d, Ich %d\n", vset, iset); | |
744 | abx500_chargalg_ac_en(di, false, 0, 0); | |
745 | abx500_chargalg_usb_en(di, true, vset, iset); | |
746 | break; | |
747 | ||
748 | default: | |
749 | dev_err(di->dev, "Unknown charger to charge from\n"); | |
750 | break; | |
751 | } | |
752 | } | |
753 | ||
754 | /** | |
755 | * abx500_chargalg_check_temp() - Check battery temperature ranges | |
756 | * @di: pointer to the abx500_chargalg structure | |
757 | * | |
758 | * The battery temperature is checked against the predefined limits and the | |
759 | * charge state is changed accordingly | |
760 | */ | |
761 | static void abx500_chargalg_check_temp(struct abx500_chargalg *di) | |
762 | { | |
b0284de0 LJ |
763 | if (di->batt_data.temp > (di->bm->temp_low + di->t_hyst_norm) && |
764 | di->batt_data.temp < (di->bm->temp_high - di->t_hyst_norm)) { | |
1668f811 AM |
765 | /* Temp OK! */ |
766 | di->events.btemp_underover = false; | |
767 | di->events.btemp_lowhigh = false; | |
768 | di->t_hyst_norm = 0; | |
769 | di->t_hyst_lowhigh = 0; | |
770 | } else { | |
b0284de0 | 771 | if (((di->batt_data.temp >= di->bm->temp_high) && |
1668f811 | 772 | (di->batt_data.temp < |
b0284de0 | 773 | (di->bm->temp_over - di->t_hyst_lowhigh))) || |
1668f811 | 774 | ((di->batt_data.temp > |
b0284de0 LJ |
775 | (di->bm->temp_under + di->t_hyst_lowhigh)) && |
776 | (di->batt_data.temp <= di->bm->temp_low))) { | |
1668f811 AM |
777 | /* TEMP minor!!!!! */ |
778 | di->events.btemp_underover = false; | |
779 | di->events.btemp_lowhigh = true; | |
b0284de0 | 780 | di->t_hyst_norm = di->bm->temp_hysteresis; |
1668f811 | 781 | di->t_hyst_lowhigh = 0; |
b0284de0 LJ |
782 | } else if (di->batt_data.temp <= di->bm->temp_under || |
783 | di->batt_data.temp >= di->bm->temp_over) { | |
1668f811 AM |
784 | /* TEMP major!!!!! */ |
785 | di->events.btemp_underover = true; | |
786 | di->events.btemp_lowhigh = false; | |
787 | di->t_hyst_norm = 0; | |
b0284de0 | 788 | di->t_hyst_lowhigh = di->bm->temp_hysteresis; |
1668f811 AM |
789 | } else { |
790 | /* Within hysteresis */ | |
791 | dev_dbg(di->dev, "Within hysteresis limit temp: %d " | |
792 | "hyst_lowhigh %d, hyst normal %d\n", | |
793 | di->batt_data.temp, di->t_hyst_lowhigh, | |
794 | di->t_hyst_norm); | |
795 | } | |
796 | } | |
797 | } | |
798 | ||
799 | /** | |
800 | * abx500_chargalg_check_charger_voltage() - Check charger voltage | |
801 | * @di: pointer to the abx500_chargalg structure | |
802 | * | |
803 | * Charger voltage is checked against maximum limit | |
804 | */ | |
805 | static void abx500_chargalg_check_charger_voltage(struct abx500_chargalg *di) | |
806 | { | |
b0284de0 | 807 | if (di->chg_info.usb_volt > di->bm->chg_params->usb_volt_max) |
1668f811 AM |
808 | di->chg_info.usb_chg_ok = false; |
809 | else | |
810 | di->chg_info.usb_chg_ok = true; | |
811 | ||
b0284de0 | 812 | if (di->chg_info.ac_volt > di->bm->chg_params->ac_volt_max) |
1668f811 AM |
813 | di->chg_info.ac_chg_ok = false; |
814 | else | |
815 | di->chg_info.ac_chg_ok = true; | |
816 | ||
817 | } | |
818 | ||
819 | /** | |
820 | * abx500_chargalg_end_of_charge() - Check if end-of-charge criteria is fulfilled | |
821 | * @di: pointer to the abx500_chargalg structure | |
822 | * | |
823 | * End-of-charge criteria is fulfilled when the battery voltage is above a | |
824 | * certain limit and the battery current is below a certain limit for a | |
825 | * predefined number of consecutive seconds. If true, the battery is full | |
826 | */ | |
827 | static void abx500_chargalg_end_of_charge(struct abx500_chargalg *di) | |
828 | { | |
829 | if (di->charge_status == POWER_SUPPLY_STATUS_CHARGING && | |
830 | di->charge_state == STATE_NORMAL && | |
831 | !di->maintenance_chg && (di->batt_data.volt >= | |
b0284de0 | 832 | di->bm->bat_type[di->bm->batt_id].termination_vol || |
1668f811 AM |
833 | di->events.usb_cv_active || di->events.ac_cv_active) && |
834 | di->batt_data.avg_curr < | |
b0284de0 | 835 | di->bm->bat_type[di->bm->batt_id].termination_curr && |
1668f811 AM |
836 | di->batt_data.avg_curr > 0) { |
837 | if (++di->eoc_cnt >= EOC_COND_CNT) { | |
838 | di->eoc_cnt = 0; | |
db43e6c4 LJ |
839 | if ((di->chg_info.charger_type & USB_CHG) && |
840 | (di->usb_chg->power_path)) | |
841 | ab8540_chargalg_usb_pp_en(di, true); | |
1668f811 AM |
842 | di->charge_status = POWER_SUPPLY_STATUS_FULL; |
843 | di->maintenance_chg = true; | |
844 | dev_dbg(di->dev, "EOC reached!\n"); | |
845 | power_supply_changed(&di->chargalg_psy); | |
846 | } else { | |
847 | dev_dbg(di->dev, | |
848 | " EOC limit reached for the %d" | |
849 | " time, out of %d before EOC\n", | |
850 | di->eoc_cnt, | |
851 | EOC_COND_CNT); | |
852 | } | |
853 | } else { | |
854 | di->eoc_cnt = 0; | |
855 | } | |
856 | } | |
857 | ||
858 | static void init_maxim_chg_curr(struct abx500_chargalg *di) | |
859 | { | |
860 | di->ccm.original_iset = | |
b0284de0 | 861 | di->bm->bat_type[di->bm->batt_id].normal_cur_lvl; |
1668f811 | 862 | di->ccm.current_iset = |
b0284de0 LJ |
863 | di->bm->bat_type[di->bm->batt_id].normal_cur_lvl; |
864 | di->ccm.test_delta_i = di->bm->maxi->charger_curr_step; | |
865 | di->ccm.max_current = di->bm->maxi->chg_curr; | |
866 | di->ccm.condition_cnt = di->bm->maxi->wait_cycles; | |
1668f811 AM |
867 | di->ccm.level = 0; |
868 | } | |
869 | ||
870 | /** | |
871 | * abx500_chargalg_chg_curr_maxim - increases the charger current to | |
872 | * compensate for the system load | |
873 | * @di pointer to the abx500_chargalg structure | |
874 | * | |
875 | * This maximization function is used to raise the charger current to get the | |
876 | * battery current as close to the optimal value as possible. The battery | |
877 | * current during charging is affected by the system load | |
878 | */ | |
879 | static enum maxim_ret abx500_chargalg_chg_curr_maxim(struct abx500_chargalg *di) | |
880 | { | |
881 | int delta_i; | |
882 | ||
b0284de0 | 883 | if (!di->bm->maxi->ena_maxi) |
1668f811 AM |
884 | return MAXIM_RET_NOACTION; |
885 | ||
886 | delta_i = di->ccm.original_iset - di->batt_data.inst_curr; | |
887 | ||
888 | if (di->events.vbus_collapsed) { | |
889 | dev_dbg(di->dev, "Charger voltage has collapsed %d\n", | |
890 | di->ccm.wait_cnt); | |
891 | if (di->ccm.wait_cnt == 0) { | |
892 | dev_dbg(di->dev, "lowering current\n"); | |
893 | di->ccm.wait_cnt++; | |
b0284de0 | 894 | di->ccm.condition_cnt = di->bm->maxi->wait_cycles; |
1668f811 AM |
895 | di->ccm.max_current = |
896 | di->ccm.current_iset - di->ccm.test_delta_i; | |
897 | di->ccm.current_iset = di->ccm.max_current; | |
898 | di->ccm.level--; | |
899 | return MAXIM_RET_CHANGE; | |
900 | } else { | |
901 | dev_dbg(di->dev, "waiting\n"); | |
902 | /* Let's go in here twice before lowering curr again */ | |
903 | di->ccm.wait_cnt = (di->ccm.wait_cnt + 1) % 3; | |
904 | return MAXIM_RET_NOACTION; | |
905 | } | |
906 | } | |
907 | ||
908 | di->ccm.wait_cnt = 0; | |
909 | ||
910 | if ((di->batt_data.inst_curr > di->ccm.original_iset)) { | |
911 | dev_dbg(di->dev, " Maximization Ibat (%dmA) too high" | |
912 | " (limit %dmA) (current iset: %dmA)!\n", | |
913 | di->batt_data.inst_curr, di->ccm.original_iset, | |
914 | di->ccm.current_iset); | |
915 | ||
916 | if (di->ccm.current_iset == di->ccm.original_iset) | |
917 | return MAXIM_RET_NOACTION; | |
918 | ||
b0284de0 | 919 | di->ccm.condition_cnt = di->bm->maxi->wait_cycles; |
1668f811 AM |
920 | di->ccm.current_iset = di->ccm.original_iset; |
921 | di->ccm.level = 0; | |
922 | ||
923 | return MAXIM_RET_IBAT_TOO_HIGH; | |
924 | } | |
925 | ||
926 | if (delta_i > di->ccm.test_delta_i && | |
927 | (di->ccm.current_iset + di->ccm.test_delta_i) < | |
928 | di->ccm.max_current) { | |
929 | if (di->ccm.condition_cnt-- == 0) { | |
930 | /* Increse the iset with cco.test_delta_i */ | |
b0284de0 | 931 | di->ccm.condition_cnt = di->bm->maxi->wait_cycles; |
1668f811 AM |
932 | di->ccm.current_iset += di->ccm.test_delta_i; |
933 | di->ccm.level++; | |
934 | dev_dbg(di->dev, " Maximization needed, increase" | |
935 | " with %d mA to %dmA (Optimal ibat: %d)" | |
936 | " Level %d\n", | |
937 | di->ccm.test_delta_i, | |
938 | di->ccm.current_iset, | |
939 | di->ccm.original_iset, | |
940 | di->ccm.level); | |
941 | return MAXIM_RET_CHANGE; | |
942 | } else { | |
943 | return MAXIM_RET_NOACTION; | |
944 | } | |
945 | } else { | |
b0284de0 | 946 | di->ccm.condition_cnt = di->bm->maxi->wait_cycles; |
1668f811 AM |
947 | return MAXIM_RET_NOACTION; |
948 | } | |
949 | } | |
950 | ||
951 | static void handle_maxim_chg_curr(struct abx500_chargalg *di) | |
952 | { | |
953 | enum maxim_ret ret; | |
954 | int result; | |
955 | ||
956 | ret = abx500_chargalg_chg_curr_maxim(di); | |
957 | switch (ret) { | |
958 | case MAXIM_RET_CHANGE: | |
959 | result = abx500_chargalg_update_chg_curr(di, | |
960 | di->ccm.current_iset); | |
961 | if (result) | |
962 | dev_err(di->dev, "failed to set chg curr\n"); | |
963 | break; | |
964 | case MAXIM_RET_IBAT_TOO_HIGH: | |
965 | result = abx500_chargalg_update_chg_curr(di, | |
b0284de0 | 966 | di->bm->bat_type[di->bm->batt_id].normal_cur_lvl); |
1668f811 AM |
967 | if (result) |
968 | dev_err(di->dev, "failed to set chg curr\n"); | |
969 | break; | |
970 | ||
971 | case MAXIM_RET_NOACTION: | |
972 | default: | |
973 | /* Do nothing..*/ | |
974 | break; | |
975 | } | |
976 | } | |
977 | ||
978 | static int abx500_chargalg_get_ext_psy_data(struct device *dev, void *data) | |
979 | { | |
980 | struct power_supply *psy; | |
981 | struct power_supply *ext; | |
982 | struct abx500_chargalg *di; | |
983 | union power_supply_propval ret; | |
984 | int i, j; | |
985 | bool psy_found = false; | |
ea402401 | 986 | bool capacity_updated = false; |
1668f811 AM |
987 | |
988 | psy = (struct power_supply *)data; | |
989 | ext = dev_get_drvdata(dev); | |
990 | di = to_abx500_chargalg_device_info(psy); | |
991 | /* For all psy where the driver name appears in any supplied_to */ | |
992 | for (i = 0; i < ext->num_supplicants; i++) { | |
993 | if (!strcmp(ext->supplied_to[i], psy->name)) | |
994 | psy_found = true; | |
995 | } | |
996 | if (!psy_found) | |
997 | return 0; | |
998 | ||
ea402401 MC |
999 | /* |
1000 | * If external is not registering 'POWER_SUPPLY_PROP_CAPACITY' to its | |
1001 | * property because of handling that sysfs entry on its own, this is | |
1002 | * the place to get the battery capacity. | |
1003 | */ | |
1004 | if (!ext->get_property(ext, POWER_SUPPLY_PROP_CAPACITY, &ret)) { | |
1005 | di->batt_data.percent = ret.intval; | |
1006 | capacity_updated = true; | |
1007 | } | |
1008 | ||
1668f811 AM |
1009 | /* Go through all properties for the psy */ |
1010 | for (j = 0; j < ext->num_properties; j++) { | |
1011 | enum power_supply_property prop; | |
1012 | prop = ext->properties[j]; | |
1013 | ||
1014 | /* Initialize chargers if not already done */ | |
1015 | if (!di->ac_chg && | |
1016 | ext->type == POWER_SUPPLY_TYPE_MAINS) | |
1017 | di->ac_chg = psy_to_ux500_charger(ext); | |
1018 | else if (!di->usb_chg && | |
1019 | ext->type == POWER_SUPPLY_TYPE_USB) | |
1020 | di->usb_chg = psy_to_ux500_charger(ext); | |
1021 | ||
1022 | if (ext->get_property(ext, prop, &ret)) | |
1023 | continue; | |
1024 | switch (prop) { | |
1025 | case POWER_SUPPLY_PROP_PRESENT: | |
1026 | switch (ext->type) { | |
1027 | case POWER_SUPPLY_TYPE_BATTERY: | |
1028 | /* Battery present */ | |
1029 | if (ret.intval) | |
1030 | di->events.batt_rem = false; | |
1031 | /* Battery removed */ | |
1032 | else | |
1033 | di->events.batt_rem = true; | |
1034 | break; | |
1035 | case POWER_SUPPLY_TYPE_MAINS: | |
1036 | /* AC disconnected */ | |
1037 | if (!ret.intval && | |
1038 | (di->chg_info.conn_chg & AC_CHG)) { | |
1039 | di->chg_info.prev_conn_chg = | |
1040 | di->chg_info.conn_chg; | |
1041 | di->chg_info.conn_chg &= ~AC_CHG; | |
1042 | } | |
1043 | /* AC connected */ | |
1044 | else if (ret.intval && | |
1045 | !(di->chg_info.conn_chg & AC_CHG)) { | |
1046 | di->chg_info.prev_conn_chg = | |
1047 | di->chg_info.conn_chg; | |
1048 | di->chg_info.conn_chg |= AC_CHG; | |
1049 | } | |
1050 | break; | |
1051 | case POWER_SUPPLY_TYPE_USB: | |
1052 | /* USB disconnected */ | |
1053 | if (!ret.intval && | |
1054 | (di->chg_info.conn_chg & USB_CHG)) { | |
1055 | di->chg_info.prev_conn_chg = | |
1056 | di->chg_info.conn_chg; | |
1057 | di->chg_info.conn_chg &= ~USB_CHG; | |
1058 | } | |
1059 | /* USB connected */ | |
1060 | else if (ret.intval && | |
1061 | !(di->chg_info.conn_chg & USB_CHG)) { | |
1062 | di->chg_info.prev_conn_chg = | |
1063 | di->chg_info.conn_chg; | |
1064 | di->chg_info.conn_chg |= USB_CHG; | |
1065 | } | |
1066 | break; | |
1067 | default: | |
1068 | break; | |
1069 | } | |
1070 | break; | |
1071 | ||
1072 | case POWER_SUPPLY_PROP_ONLINE: | |
1073 | switch (ext->type) { | |
1074 | case POWER_SUPPLY_TYPE_BATTERY: | |
1075 | break; | |
1076 | case POWER_SUPPLY_TYPE_MAINS: | |
1077 | /* AC offline */ | |
1078 | if (!ret.intval && | |
1079 | (di->chg_info.online_chg & AC_CHG)) { | |
1080 | di->chg_info.prev_online_chg = | |
1081 | di->chg_info.online_chg; | |
1082 | di->chg_info.online_chg &= ~AC_CHG; | |
1083 | } | |
1084 | /* AC online */ | |
1085 | else if (ret.intval && | |
1086 | !(di->chg_info.online_chg & AC_CHG)) { | |
1087 | di->chg_info.prev_online_chg = | |
1088 | di->chg_info.online_chg; | |
1089 | di->chg_info.online_chg |= AC_CHG; | |
1090 | queue_delayed_work(di->chargalg_wq, | |
1091 | &di->chargalg_wd_work, 0); | |
1092 | } | |
1093 | break; | |
1094 | case POWER_SUPPLY_TYPE_USB: | |
1095 | /* USB offline */ | |
1096 | if (!ret.intval && | |
1097 | (di->chg_info.online_chg & USB_CHG)) { | |
1098 | di->chg_info.prev_online_chg = | |
1099 | di->chg_info.online_chg; | |
1100 | di->chg_info.online_chg &= ~USB_CHG; | |
1101 | } | |
1102 | /* USB online */ | |
1103 | else if (ret.intval && | |
1104 | !(di->chg_info.online_chg & USB_CHG)) { | |
1105 | di->chg_info.prev_online_chg = | |
1106 | di->chg_info.online_chg; | |
1107 | di->chg_info.online_chg |= USB_CHG; | |
1108 | queue_delayed_work(di->chargalg_wq, | |
1109 | &di->chargalg_wd_work, 0); | |
1110 | } | |
1111 | break; | |
1112 | default: | |
1113 | break; | |
1114 | } | |
1115 | break; | |
1116 | ||
1117 | case POWER_SUPPLY_PROP_HEALTH: | |
1118 | switch (ext->type) { | |
1119 | case POWER_SUPPLY_TYPE_BATTERY: | |
1120 | break; | |
1121 | case POWER_SUPPLY_TYPE_MAINS: | |
1122 | switch (ret.intval) { | |
1123 | case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE: | |
1124 | di->events.mainextchnotok = true; | |
1125 | di->events.main_thermal_prot = false; | |
1126 | di->events.main_ovv = false; | |
1127 | di->events.ac_wd_expired = false; | |
1128 | break; | |
1129 | case POWER_SUPPLY_HEALTH_DEAD: | |
1130 | di->events.ac_wd_expired = true; | |
1131 | di->events.mainextchnotok = false; | |
1132 | di->events.main_ovv = false; | |
1133 | di->events.main_thermal_prot = false; | |
1134 | break; | |
1135 | case POWER_SUPPLY_HEALTH_COLD: | |
1136 | case POWER_SUPPLY_HEALTH_OVERHEAT: | |
1137 | di->events.main_thermal_prot = true; | |
1138 | di->events.mainextchnotok = false; | |
1139 | di->events.main_ovv = false; | |
1140 | di->events.ac_wd_expired = false; | |
1141 | break; | |
1142 | case POWER_SUPPLY_HEALTH_OVERVOLTAGE: | |
1143 | di->events.main_ovv = true; | |
1144 | di->events.mainextchnotok = false; | |
1145 | di->events.main_thermal_prot = false; | |
1146 | di->events.ac_wd_expired = false; | |
1147 | break; | |
1148 | case POWER_SUPPLY_HEALTH_GOOD: | |
1149 | di->events.main_thermal_prot = false; | |
1150 | di->events.mainextchnotok = false; | |
1151 | di->events.main_ovv = false; | |
1152 | di->events.ac_wd_expired = false; | |
1153 | break; | |
1154 | default: | |
1155 | break; | |
1156 | } | |
1157 | break; | |
1158 | ||
1159 | case POWER_SUPPLY_TYPE_USB: | |
1160 | switch (ret.intval) { | |
1161 | case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE: | |
1162 | di->events.usbchargernotok = true; | |
1163 | di->events.usb_thermal_prot = false; | |
1164 | di->events.vbus_ovv = false; | |
1165 | di->events.usb_wd_expired = false; | |
1166 | break; | |
1167 | case POWER_SUPPLY_HEALTH_DEAD: | |
1168 | di->events.usb_wd_expired = true; | |
1169 | di->events.usbchargernotok = false; | |
1170 | di->events.usb_thermal_prot = false; | |
1171 | di->events.vbus_ovv = false; | |
1172 | break; | |
1173 | case POWER_SUPPLY_HEALTH_COLD: | |
1174 | case POWER_SUPPLY_HEALTH_OVERHEAT: | |
1175 | di->events.usb_thermal_prot = true; | |
1176 | di->events.usbchargernotok = false; | |
1177 | di->events.vbus_ovv = false; | |
1178 | di->events.usb_wd_expired = false; | |
1179 | break; | |
1180 | case POWER_SUPPLY_HEALTH_OVERVOLTAGE: | |
1181 | di->events.vbus_ovv = true; | |
1182 | di->events.usbchargernotok = false; | |
1183 | di->events.usb_thermal_prot = false; | |
1184 | di->events.usb_wd_expired = false; | |
1185 | break; | |
1186 | case POWER_SUPPLY_HEALTH_GOOD: | |
1187 | di->events.usbchargernotok = false; | |
1188 | di->events.usb_thermal_prot = false; | |
1189 | di->events.vbus_ovv = false; | |
1190 | di->events.usb_wd_expired = false; | |
1191 | break; | |
1192 | default: | |
1193 | break; | |
1194 | } | |
1195 | default: | |
1196 | break; | |
1197 | } | |
1198 | break; | |
1199 | ||
1200 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
1201 | switch (ext->type) { | |
1202 | case POWER_SUPPLY_TYPE_BATTERY: | |
1203 | di->batt_data.volt = ret.intval / 1000; | |
1204 | break; | |
1205 | case POWER_SUPPLY_TYPE_MAINS: | |
1206 | di->chg_info.ac_volt = ret.intval / 1000; | |
1207 | break; | |
1208 | case POWER_SUPPLY_TYPE_USB: | |
1209 | di->chg_info.usb_volt = ret.intval / 1000; | |
1210 | break; | |
1211 | default: | |
1212 | break; | |
1213 | } | |
1214 | break; | |
1215 | ||
1216 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
1217 | switch (ext->type) { | |
1218 | case POWER_SUPPLY_TYPE_MAINS: | |
1219 | /* AVG is used to indicate when we are | |
1220 | * in CV mode */ | |
1221 | if (ret.intval) | |
1222 | di->events.ac_cv_active = true; | |
1223 | else | |
1224 | di->events.ac_cv_active = false; | |
1225 | ||
1226 | break; | |
1227 | case POWER_SUPPLY_TYPE_USB: | |
1228 | /* AVG is used to indicate when we are | |
1229 | * in CV mode */ | |
1230 | if (ret.intval) | |
1231 | di->events.usb_cv_active = true; | |
1232 | else | |
1233 | di->events.usb_cv_active = false; | |
1234 | ||
1235 | break; | |
1236 | default: | |
1237 | break; | |
1238 | } | |
1239 | break; | |
1240 | ||
1241 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
1242 | switch (ext->type) { | |
1243 | case POWER_SUPPLY_TYPE_BATTERY: | |
1244 | if (ret.intval) | |
1245 | di->events.batt_unknown = false; | |
1246 | else | |
1247 | di->events.batt_unknown = true; | |
1248 | ||
1249 | break; | |
1250 | default: | |
1251 | break; | |
1252 | } | |
1253 | break; | |
1254 | ||
1255 | case POWER_SUPPLY_PROP_TEMP: | |
1256 | di->batt_data.temp = ret.intval / 10; | |
1257 | break; | |
1258 | ||
1259 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
1260 | switch (ext->type) { | |
1261 | case POWER_SUPPLY_TYPE_MAINS: | |
1262 | di->chg_info.ac_curr = | |
1263 | ret.intval / 1000; | |
1264 | break; | |
1265 | case POWER_SUPPLY_TYPE_USB: | |
1266 | di->chg_info.usb_curr = | |
1267 | ret.intval / 1000; | |
1268 | break; | |
1269 | case POWER_SUPPLY_TYPE_BATTERY: | |
1270 | di->batt_data.inst_curr = ret.intval / 1000; | |
1271 | break; | |
1272 | default: | |
1273 | break; | |
1274 | } | |
1275 | break; | |
1276 | ||
1277 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
1278 | switch (ext->type) { | |
1279 | case POWER_SUPPLY_TYPE_BATTERY: | |
1280 | di->batt_data.avg_curr = ret.intval / 1000; | |
1281 | break; | |
1282 | case POWER_SUPPLY_TYPE_USB: | |
1283 | if (ret.intval) | |
1284 | di->events.vbus_collapsed = true; | |
1285 | else | |
1286 | di->events.vbus_collapsed = false; | |
1287 | break; | |
1288 | default: | |
1289 | break; | |
1290 | } | |
1291 | break; | |
1292 | case POWER_SUPPLY_PROP_CAPACITY: | |
ea402401 MC |
1293 | if (!capacity_updated) |
1294 | di->batt_data.percent = ret.intval; | |
1668f811 AM |
1295 | break; |
1296 | default: | |
1297 | break; | |
1298 | } | |
1299 | } | |
1300 | return 0; | |
1301 | } | |
1302 | ||
1303 | /** | |
1304 | * abx500_chargalg_external_power_changed() - callback for power supply changes | |
1305 | * @psy: pointer to the structure power_supply | |
1306 | * | |
1307 | * This function is the entry point of the pointer external_power_changed | |
1308 | * of the structure power_supply. | |
1309 | * This function gets executed when there is a change in any external power | |
1310 | * supply that this driver needs to be notified of. | |
1311 | */ | |
1312 | static void abx500_chargalg_external_power_changed(struct power_supply *psy) | |
1313 | { | |
1314 | struct abx500_chargalg *di = to_abx500_chargalg_device_info(psy); | |
1315 | ||
1316 | /* | |
1317 | * Trigger execution of the algorithm instantly and read | |
1318 | * all power_supply properties there instead | |
1319 | */ | |
1320 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
1321 | } | |
1322 | ||
1323 | /** | |
1324 | * abx500_chargalg_algorithm() - Main function for the algorithm | |
1325 | * @di: pointer to the abx500_chargalg structure | |
1326 | * | |
1327 | * This is the main control function for the charging algorithm. | |
1328 | * It is called periodically or when something happens that will | |
1329 | * trigger a state change | |
1330 | */ | |
1331 | static void abx500_chargalg_algorithm(struct abx500_chargalg *di) | |
1332 | { | |
1333 | int charger_status; | |
4dcdf577 | 1334 | int ret; |
4d3b4aa5 | 1335 | int curr_step_lvl; |
1668f811 AM |
1336 | |
1337 | /* Collect data from all power_supply class devices */ | |
1338 | class_for_each_device(power_supply_class, NULL, | |
1339 | &di->chargalg_psy, abx500_chargalg_get_ext_psy_data); | |
1340 | ||
1341 | abx500_chargalg_end_of_charge(di); | |
1342 | abx500_chargalg_check_temp(di); | |
1343 | abx500_chargalg_check_charger_voltage(di); | |
1344 | ||
1345 | charger_status = abx500_chargalg_check_charger_connection(di); | |
4d3b4aa5 | 1346 | abx500_chargalg_check_current_step_status(di); |
4dcdf577 LJ |
1347 | |
1348 | if (is_ab8500(di->parent)) { | |
1349 | ret = abx500_chargalg_check_charger_enable(di); | |
1350 | if (ret < 0) | |
1351 | dev_err(di->dev, "Checking charger is enabled error" | |
1352 | ": Returned Value %d\n", ret); | |
1353 | } | |
1354 | ||
1668f811 AM |
1355 | /* |
1356 | * First check if we have a charger connected. | |
1357 | * Also we don't allow charging of unknown batteries if configured | |
1358 | * this way | |
1359 | */ | |
1360 | if (!charger_status || | |
b0284de0 | 1361 | (di->events.batt_unknown && !di->bm->chg_unknown_bat)) { |
1668f811 AM |
1362 | if (di->charge_state != STATE_HANDHELD) { |
1363 | di->events.safety_timer_expired = false; | |
1364 | abx500_chargalg_state_to(di, STATE_HANDHELD_INIT); | |
1365 | } | |
1366 | } | |
1367 | ||
1368 | /* If suspended, we should not continue checking the flags */ | |
1369 | else if (di->charge_state == STATE_SUSPENDED_INIT || | |
1370 | di->charge_state == STATE_SUSPENDED) { | |
1371 | /* We don't do anything here, just don,t continue */ | |
1372 | } | |
1373 | ||
1374 | /* Safety timer expiration */ | |
1375 | else if (di->events.safety_timer_expired) { | |
1376 | if (di->charge_state != STATE_SAFETY_TIMER_EXPIRED) | |
1377 | abx500_chargalg_state_to(di, | |
1378 | STATE_SAFETY_TIMER_EXPIRED_INIT); | |
1379 | } | |
1380 | /* | |
1381 | * Check if any interrupts has occured | |
1382 | * that will prevent us from charging | |
1383 | */ | |
1384 | ||
1385 | /* Battery removed */ | |
1386 | else if (di->events.batt_rem) { | |
1387 | if (di->charge_state != STATE_BATT_REMOVED) | |
1388 | abx500_chargalg_state_to(di, STATE_BATT_REMOVED_INIT); | |
1389 | } | |
1390 | /* Main or USB charger not ok. */ | |
1391 | else if (di->events.mainextchnotok || di->events.usbchargernotok) { | |
1392 | /* | |
1393 | * If vbus_collapsed is set, we have to lower the charger | |
1394 | * current, which is done in the normal state below | |
1395 | */ | |
1396 | if (di->charge_state != STATE_CHG_NOT_OK && | |
1397 | !di->events.vbus_collapsed) | |
1398 | abx500_chargalg_state_to(di, STATE_CHG_NOT_OK_INIT); | |
1399 | } | |
1400 | /* VBUS, Main or VBAT OVV. */ | |
1401 | else if (di->events.vbus_ovv || | |
1402 | di->events.main_ovv || | |
1403 | di->events.batt_ovv || | |
1404 | !di->chg_info.usb_chg_ok || | |
1405 | !di->chg_info.ac_chg_ok) { | |
1406 | if (di->charge_state != STATE_OVV_PROTECT) | |
1407 | abx500_chargalg_state_to(di, STATE_OVV_PROTECT_INIT); | |
1408 | } | |
1409 | /* USB Thermal, stop charging */ | |
1410 | else if (di->events.main_thermal_prot || | |
1411 | di->events.usb_thermal_prot) { | |
1412 | if (di->charge_state != STATE_HW_TEMP_PROTECT) | |
1413 | abx500_chargalg_state_to(di, | |
1414 | STATE_HW_TEMP_PROTECT_INIT); | |
1415 | } | |
1416 | /* Battery temp over/under */ | |
1417 | else if (di->events.btemp_underover) { | |
1418 | if (di->charge_state != STATE_TEMP_UNDEROVER) | |
1419 | abx500_chargalg_state_to(di, | |
1420 | STATE_TEMP_UNDEROVER_INIT); | |
1421 | } | |
1422 | /* Watchdog expired */ | |
1423 | else if (di->events.ac_wd_expired || | |
1424 | di->events.usb_wd_expired) { | |
1425 | if (di->charge_state != STATE_WD_EXPIRED) | |
1426 | abx500_chargalg_state_to(di, STATE_WD_EXPIRED_INIT); | |
1427 | } | |
1428 | /* Battery temp high/low */ | |
1429 | else if (di->events.btemp_lowhigh) { | |
1430 | if (di->charge_state != STATE_TEMP_LOWHIGH) | |
1431 | abx500_chargalg_state_to(di, STATE_TEMP_LOWHIGH_INIT); | |
1432 | } | |
1433 | ||
1434 | dev_dbg(di->dev, | |
1435 | "[CHARGALG] Vb %d Ib_avg %d Ib_inst %d Tb %d Cap %d Maint %d " | |
1436 | "State %s Active_chg %d Chg_status %d AC %d USB %d " | |
1437 | "AC_online %d USB_online %d AC_CV %d USB_CV %d AC_I %d " | |
1438 | "USB_I %d AC_Vset %d AC_Iset %d USB_Vset %d USB_Iset %d\n", | |
1439 | di->batt_data.volt, | |
1440 | di->batt_data.avg_curr, | |
1441 | di->batt_data.inst_curr, | |
1442 | di->batt_data.temp, | |
1443 | di->batt_data.percent, | |
1444 | di->maintenance_chg, | |
1445 | states[di->charge_state], | |
1446 | di->chg_info.charger_type, | |
1447 | di->charge_status, | |
1448 | di->chg_info.conn_chg & AC_CHG, | |
1449 | di->chg_info.conn_chg & USB_CHG, | |
1450 | di->chg_info.online_chg & AC_CHG, | |
1451 | di->chg_info.online_chg & USB_CHG, | |
1452 | di->events.ac_cv_active, | |
1453 | di->events.usb_cv_active, | |
1454 | di->chg_info.ac_curr, | |
1455 | di->chg_info.usb_curr, | |
1456 | di->chg_info.ac_vset, | |
1457 | di->chg_info.ac_iset, | |
1458 | di->chg_info.usb_vset, | |
1459 | di->chg_info.usb_iset); | |
1460 | ||
1461 | switch (di->charge_state) { | |
1462 | case STATE_HANDHELD_INIT: | |
1463 | abx500_chargalg_stop_charging(di); | |
1464 | di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING; | |
1465 | abx500_chargalg_state_to(di, STATE_HANDHELD); | |
1466 | /* Intentional fallthrough */ | |
1467 | ||
1468 | case STATE_HANDHELD: | |
1469 | break; | |
1470 | ||
1471 | case STATE_SUSPENDED_INIT: | |
1472 | if (di->susp_status.ac_suspended) | |
1473 | abx500_chargalg_ac_en(di, false, 0, 0); | |
1474 | if (di->susp_status.usb_suspended) | |
1475 | abx500_chargalg_usb_en(di, false, 0, 0); | |
1476 | abx500_chargalg_stop_safety_timer(di); | |
1477 | abx500_chargalg_stop_maintenance_timer(di); | |
1478 | di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
1479 | di->maintenance_chg = false; | |
1480 | abx500_chargalg_state_to(di, STATE_SUSPENDED); | |
1481 | power_supply_changed(&di->chargalg_psy); | |
1482 | /* Intentional fallthrough */ | |
1483 | ||
1484 | case STATE_SUSPENDED: | |
1485 | /* CHARGING is suspended */ | |
1486 | break; | |
1487 | ||
1488 | case STATE_BATT_REMOVED_INIT: | |
1489 | abx500_chargalg_stop_charging(di); | |
1490 | abx500_chargalg_state_to(di, STATE_BATT_REMOVED); | |
1491 | /* Intentional fallthrough */ | |
1492 | ||
1493 | case STATE_BATT_REMOVED: | |
1494 | if (!di->events.batt_rem) | |
1495 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1496 | break; | |
1497 | ||
1498 | case STATE_HW_TEMP_PROTECT_INIT: | |
1499 | abx500_chargalg_stop_charging(di); | |
1500 | abx500_chargalg_state_to(di, STATE_HW_TEMP_PROTECT); | |
1501 | /* Intentional fallthrough */ | |
1502 | ||
1503 | case STATE_HW_TEMP_PROTECT: | |
1504 | if (!di->events.main_thermal_prot && | |
1505 | !di->events.usb_thermal_prot) | |
1506 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1507 | break; | |
1508 | ||
1509 | case STATE_OVV_PROTECT_INIT: | |
1510 | abx500_chargalg_stop_charging(di); | |
1511 | abx500_chargalg_state_to(di, STATE_OVV_PROTECT); | |
1512 | /* Intentional fallthrough */ | |
1513 | ||
1514 | case STATE_OVV_PROTECT: | |
1515 | if (!di->events.vbus_ovv && | |
1516 | !di->events.main_ovv && | |
1517 | !di->events.batt_ovv && | |
1518 | di->chg_info.usb_chg_ok && | |
1519 | di->chg_info.ac_chg_ok) | |
1520 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1521 | break; | |
1522 | ||
1523 | case STATE_CHG_NOT_OK_INIT: | |
1524 | abx500_chargalg_stop_charging(di); | |
1525 | abx500_chargalg_state_to(di, STATE_CHG_NOT_OK); | |
1526 | /* Intentional fallthrough */ | |
1527 | ||
1528 | case STATE_CHG_NOT_OK: | |
1529 | if (!di->events.mainextchnotok && | |
1530 | !di->events.usbchargernotok) | |
1531 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1532 | break; | |
1533 | ||
1534 | case STATE_SAFETY_TIMER_EXPIRED_INIT: | |
1535 | abx500_chargalg_stop_charging(di); | |
1536 | abx500_chargalg_state_to(di, STATE_SAFETY_TIMER_EXPIRED); | |
1537 | /* Intentional fallthrough */ | |
1538 | ||
1539 | case STATE_SAFETY_TIMER_EXPIRED: | |
1540 | /* We exit this state when charger is removed */ | |
1541 | break; | |
1542 | ||
1543 | case STATE_NORMAL_INIT: | |
db43e6c4 LJ |
1544 | if ((di->chg_info.charger_type & USB_CHG) && |
1545 | di->usb_chg->power_path) { | |
1546 | if (di->batt_data.volt > | |
1547 | (di->bm->fg_params->lowbat_threshold + | |
1548 | BAT_PLUS_MARGIN)) { | |
1549 | ab8540_chargalg_usb_pre_chg_en(di, false); | |
1550 | ab8540_chargalg_usb_pp_en(di, false); | |
1551 | } else { | |
1552 | ab8540_chargalg_usb_pp_en(di, true); | |
1553 | ab8540_chargalg_usb_pre_chg_en(di, true); | |
1554 | abx500_chargalg_state_to(di, | |
1555 | STATE_USB_PP_PRE_CHARGE); | |
1556 | break; | |
1557 | } | |
1558 | } | |
1559 | ||
4d3b4aa5 LJ |
1560 | if (di->curr_status.curr_step == CHARGALG_CURR_STEP_LOW) |
1561 | abx500_chargalg_stop_charging(di); | |
1562 | else { | |
1563 | curr_step_lvl = di->bm->bat_type[ | |
1564 | di->bm->batt_id].normal_cur_lvl | |
1565 | * di->curr_status.curr_step | |
1566 | / CHARGALG_CURR_STEP_HIGH; | |
1567 | abx500_chargalg_start_charging(di, | |
1568 | di->bm->bat_type[di->bm->batt_id] | |
1569 | .normal_vol_lvl, curr_step_lvl); | |
1570 | } | |
1571 | ||
1668f811 AM |
1572 | abx500_chargalg_state_to(di, STATE_NORMAL); |
1573 | abx500_chargalg_start_safety_timer(di); | |
1574 | abx500_chargalg_stop_maintenance_timer(di); | |
1575 | init_maxim_chg_curr(di); | |
1576 | di->charge_status = POWER_SUPPLY_STATUS_CHARGING; | |
1577 | di->eoc_cnt = 0; | |
1578 | di->maintenance_chg = false; | |
1579 | power_supply_changed(&di->chargalg_psy); | |
1580 | ||
1581 | break; | |
1582 | ||
db43e6c4 LJ |
1583 | case STATE_USB_PP_PRE_CHARGE: |
1584 | if (di->batt_data.volt > | |
1585 | (di->bm->fg_params->lowbat_threshold + | |
1586 | BAT_PLUS_MARGIN)) | |
1587 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1588 | break; | |
1589 | ||
1668f811 AM |
1590 | case STATE_NORMAL: |
1591 | handle_maxim_chg_curr(di); | |
1592 | if (di->charge_status == POWER_SUPPLY_STATUS_FULL && | |
1593 | di->maintenance_chg) { | |
b0284de0 | 1594 | if (di->bm->no_maintenance) |
1668f811 AM |
1595 | abx500_chargalg_state_to(di, |
1596 | STATE_WAIT_FOR_RECHARGE_INIT); | |
1597 | else | |
1598 | abx500_chargalg_state_to(di, | |
1599 | STATE_MAINTENANCE_A_INIT); | |
1600 | } | |
1601 | break; | |
1602 | ||
1603 | /* This state will be used when the maintenance state is disabled */ | |
1604 | case STATE_WAIT_FOR_RECHARGE_INIT: | |
1605 | abx500_chargalg_hold_charging(di); | |
1606 | abx500_chargalg_state_to(di, STATE_WAIT_FOR_RECHARGE); | |
1668f811 AM |
1607 | /* Intentional fallthrough */ |
1608 | ||
1609 | case STATE_WAIT_FOR_RECHARGE: | |
ea402401 MC |
1610 | if (di->batt_data.percent <= |
1611 | di->bm->bat_type[di->bm->batt_id]. | |
1612 | recharge_cap) | |
1613 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1668f811 AM |
1614 | break; |
1615 | ||
1616 | case STATE_MAINTENANCE_A_INIT: | |
1617 | abx500_chargalg_stop_safety_timer(di); | |
1618 | abx500_chargalg_start_maintenance_timer(di, | |
b0284de0 LJ |
1619 | di->bm->bat_type[ |
1620 | di->bm->batt_id].maint_a_chg_timer_h); | |
1668f811 | 1621 | abx500_chargalg_start_charging(di, |
b0284de0 LJ |
1622 | di->bm->bat_type[ |
1623 | di->bm->batt_id].maint_a_vol_lvl, | |
1624 | di->bm->bat_type[ | |
1625 | di->bm->batt_id].maint_a_cur_lvl); | |
1668f811 AM |
1626 | abx500_chargalg_state_to(di, STATE_MAINTENANCE_A); |
1627 | power_supply_changed(&di->chargalg_psy); | |
1628 | /* Intentional fallthrough*/ | |
1629 | ||
1630 | case STATE_MAINTENANCE_A: | |
1631 | if (di->events.maintenance_timer_expired) { | |
1632 | abx500_chargalg_stop_maintenance_timer(di); | |
1633 | abx500_chargalg_state_to(di, STATE_MAINTENANCE_B_INIT); | |
1634 | } | |
1635 | break; | |
1636 | ||
1637 | case STATE_MAINTENANCE_B_INIT: | |
1638 | abx500_chargalg_start_maintenance_timer(di, | |
b0284de0 LJ |
1639 | di->bm->bat_type[ |
1640 | di->bm->batt_id].maint_b_chg_timer_h); | |
1668f811 | 1641 | abx500_chargalg_start_charging(di, |
b0284de0 LJ |
1642 | di->bm->bat_type[ |
1643 | di->bm->batt_id].maint_b_vol_lvl, | |
1644 | di->bm->bat_type[ | |
1645 | di->bm->batt_id].maint_b_cur_lvl); | |
1668f811 AM |
1646 | abx500_chargalg_state_to(di, STATE_MAINTENANCE_B); |
1647 | power_supply_changed(&di->chargalg_psy); | |
1648 | /* Intentional fallthrough*/ | |
1649 | ||
1650 | case STATE_MAINTENANCE_B: | |
1651 | if (di->events.maintenance_timer_expired) { | |
1652 | abx500_chargalg_stop_maintenance_timer(di); | |
1653 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1654 | } | |
1655 | break; | |
1656 | ||
1657 | case STATE_TEMP_LOWHIGH_INIT: | |
1658 | abx500_chargalg_start_charging(di, | |
b0284de0 LJ |
1659 | di->bm->bat_type[ |
1660 | di->bm->batt_id].low_high_vol_lvl, | |
1661 | di->bm->bat_type[ | |
1662 | di->bm->batt_id].low_high_cur_lvl); | |
1668f811 AM |
1663 | abx500_chargalg_stop_maintenance_timer(di); |
1664 | di->charge_status = POWER_SUPPLY_STATUS_CHARGING; | |
1665 | abx500_chargalg_state_to(di, STATE_TEMP_LOWHIGH); | |
1666 | power_supply_changed(&di->chargalg_psy); | |
1667 | /* Intentional fallthrough */ | |
1668 | ||
1669 | case STATE_TEMP_LOWHIGH: | |
1670 | if (!di->events.btemp_lowhigh) | |
1671 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1672 | break; | |
1673 | ||
1674 | case STATE_WD_EXPIRED_INIT: | |
1675 | abx500_chargalg_stop_charging(di); | |
1676 | abx500_chargalg_state_to(di, STATE_WD_EXPIRED); | |
1677 | /* Intentional fallthrough */ | |
1678 | ||
1679 | case STATE_WD_EXPIRED: | |
1680 | if (!di->events.ac_wd_expired && | |
1681 | !di->events.usb_wd_expired) | |
1682 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1683 | break; | |
1684 | ||
1685 | case STATE_TEMP_UNDEROVER_INIT: | |
1686 | abx500_chargalg_stop_charging(di); | |
1687 | abx500_chargalg_state_to(di, STATE_TEMP_UNDEROVER); | |
1688 | /* Intentional fallthrough */ | |
1689 | ||
1690 | case STATE_TEMP_UNDEROVER: | |
1691 | if (!di->events.btemp_underover) | |
1692 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1693 | break; | |
1694 | } | |
1695 | ||
1696 | /* Start charging directly if the new state is a charge state */ | |
1697 | if (di->charge_state == STATE_NORMAL_INIT || | |
1698 | di->charge_state == STATE_MAINTENANCE_A_INIT || | |
1699 | di->charge_state == STATE_MAINTENANCE_B_INIT) | |
1700 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
1701 | } | |
1702 | ||
1703 | /** | |
1704 | * abx500_chargalg_periodic_work() - Periodic work for the algorithm | |
1705 | * @work: pointer to the work_struct structure | |
1706 | * | |
1707 | * Work queue function for the charging algorithm | |
1708 | */ | |
1709 | static void abx500_chargalg_periodic_work(struct work_struct *work) | |
1710 | { | |
1711 | struct abx500_chargalg *di = container_of(work, | |
1712 | struct abx500_chargalg, chargalg_periodic_work.work); | |
1713 | ||
1714 | abx500_chargalg_algorithm(di); | |
1715 | ||
1716 | /* | |
1717 | * If a charger is connected then the battery has to be monitored | |
1718 | * frequently, else the work can be delayed. | |
1719 | */ | |
1720 | if (di->chg_info.conn_chg) | |
1721 | queue_delayed_work(di->chargalg_wq, | |
1722 | &di->chargalg_periodic_work, | |
b0284de0 | 1723 | di->bm->interval_charging * HZ); |
1668f811 AM |
1724 | else |
1725 | queue_delayed_work(di->chargalg_wq, | |
1726 | &di->chargalg_periodic_work, | |
b0284de0 | 1727 | di->bm->interval_not_charging * HZ); |
1668f811 AM |
1728 | } |
1729 | ||
1730 | /** | |
1731 | * abx500_chargalg_wd_work() - periodic work to kick the charger watchdog | |
1732 | * @work: pointer to the work_struct structure | |
1733 | * | |
1734 | * Work queue function for kicking the charger watchdog | |
1735 | */ | |
1736 | static void abx500_chargalg_wd_work(struct work_struct *work) | |
1737 | { | |
1738 | int ret; | |
1739 | struct abx500_chargalg *di = container_of(work, | |
1740 | struct abx500_chargalg, chargalg_wd_work.work); | |
1741 | ||
1742 | dev_dbg(di->dev, "abx500_chargalg_wd_work\n"); | |
1743 | ||
1744 | ret = abx500_chargalg_kick_watchdog(di); | |
1745 | if (ret < 0) | |
1746 | dev_err(di->dev, "failed to kick watchdog\n"); | |
1747 | ||
1748 | queue_delayed_work(di->chargalg_wq, | |
1749 | &di->chargalg_wd_work, CHG_WD_INTERVAL); | |
1750 | } | |
1751 | ||
1752 | /** | |
1753 | * abx500_chargalg_work() - Work to run the charging algorithm instantly | |
1754 | * @work: pointer to the work_struct structure | |
1755 | * | |
1756 | * Work queue function for calling the charging algorithm | |
1757 | */ | |
1758 | static void abx500_chargalg_work(struct work_struct *work) | |
1759 | { | |
1760 | struct abx500_chargalg *di = container_of(work, | |
1761 | struct abx500_chargalg, chargalg_work); | |
1762 | ||
1763 | abx500_chargalg_algorithm(di); | |
1764 | } | |
1765 | ||
1766 | /** | |
1767 | * abx500_chargalg_get_property() - get the chargalg properties | |
1768 | * @psy: pointer to the power_supply structure | |
1769 | * @psp: pointer to the power_supply_property structure | |
1770 | * @val: pointer to the power_supply_propval union | |
1771 | * | |
1772 | * This function gets called when an application tries to get the | |
1773 | * chargalg properties by reading the sysfs files. | |
1774 | * status: charging/discharging/full/unknown | |
1775 | * health: health of the battery | |
1776 | * Returns error code in case of failure else 0 on success | |
1777 | */ | |
1778 | static int abx500_chargalg_get_property(struct power_supply *psy, | |
1779 | enum power_supply_property psp, | |
1780 | union power_supply_propval *val) | |
1781 | { | |
1782 | struct abx500_chargalg *di; | |
1783 | ||
1784 | di = to_abx500_chargalg_device_info(psy); | |
1785 | ||
1786 | switch (psp) { | |
1787 | case POWER_SUPPLY_PROP_STATUS: | |
1788 | val->intval = di->charge_status; | |
1789 | break; | |
1790 | case POWER_SUPPLY_PROP_HEALTH: | |
1791 | if (di->events.batt_ovv) { | |
1792 | val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; | |
1793 | } else if (di->events.btemp_underover) { | |
b0284de0 | 1794 | if (di->batt_data.temp <= di->bm->temp_under) |
1668f811 AM |
1795 | val->intval = POWER_SUPPLY_HEALTH_COLD; |
1796 | else | |
1797 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
d80108fc LJ |
1798 | } else if (di->charge_state == STATE_SAFETY_TIMER_EXPIRED || |
1799 | di->charge_state == STATE_SAFETY_TIMER_EXPIRED_INIT) { | |
1800 | val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; | |
1668f811 AM |
1801 | } else { |
1802 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
1803 | } | |
1804 | break; | |
1805 | default: | |
1806 | return -EINVAL; | |
1807 | } | |
1808 | return 0; | |
1809 | } | |
1810 | ||
1811 | /* Exposure to the sysfs interface */ | |
1812 | ||
4d3b4aa5 LJ |
1813 | static ssize_t abx500_chargalg_curr_step_show(struct abx500_chargalg *di, |
1814 | char *buf) | |
c9ade0fc | 1815 | { |
4d3b4aa5 LJ |
1816 | return sprintf(buf, "%d\n", di->curr_status.curr_step); |
1817 | } | |
1818 | ||
1819 | static ssize_t abx500_chargalg_curr_step_store(struct abx500_chargalg *di, | |
1820 | const char *buf, size_t length) | |
1821 | { | |
1822 | long int param; | |
1823 | int ret; | |
1824 | ||
1825 | ret = kstrtol(buf, 10, ¶m); | |
1826 | if (ret < 0) | |
1827 | return ret; | |
c9ade0fc | 1828 | |
4d3b4aa5 LJ |
1829 | di->curr_status.curr_step = param; |
1830 | if (di->curr_status.curr_step >= CHARGALG_CURR_STEP_LOW && | |
1831 | di->curr_status.curr_step <= CHARGALG_CURR_STEP_HIGH) { | |
1832 | di->curr_status.curr_step_change = true; | |
1833 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
1834 | } else | |
1835 | dev_info(di->dev, "Wrong current step\n" | |
1836 | "Enter 0. Disable AC/USB Charging\n" | |
1837 | "1--100. Set AC/USB charging current step\n" | |
1838 | "100. Enable AC/USB Charging\n"); | |
1839 | ||
1840 | return strlen(buf); | |
1841 | } | |
1842 | ||
1843 | ||
1844 | static ssize_t abx500_chargalg_en_show(struct abx500_chargalg *di, | |
1845 | char *buf) | |
1846 | { | |
c9ade0fc LJ |
1847 | return sprintf(buf, "%d\n", |
1848 | di->susp_status.ac_suspended && | |
1849 | di->susp_status.usb_suspended); | |
1850 | } | |
1851 | ||
4d3b4aa5 LJ |
1852 | static ssize_t abx500_chargalg_en_store(struct abx500_chargalg *di, |
1853 | const char *buf, size_t length) | |
1668f811 | 1854 | { |
1668f811 AM |
1855 | long int param; |
1856 | int ac_usb; | |
1857 | int ret; | |
1668f811 | 1858 | |
4d3b4aa5 LJ |
1859 | ret = kstrtol(buf, 10, ¶m); |
1860 | if (ret < 0) | |
1861 | return ret; | |
1862 | ||
1863 | ac_usb = param; | |
1864 | switch (ac_usb) { | |
1865 | case 0: | |
1866 | /* Disable charging */ | |
1867 | di->susp_status.ac_suspended = true; | |
1868 | di->susp_status.usb_suspended = true; | |
1869 | di->susp_status.suspended_change = true; | |
1870 | /* Trigger a state change */ | |
1871 | queue_work(di->chargalg_wq, | |
1872 | &di->chargalg_work); | |
1873 | break; | |
1874 | case 1: | |
1875 | /* Enable AC Charging */ | |
1876 | di->susp_status.ac_suspended = false; | |
1877 | di->susp_status.suspended_change = true; | |
1878 | /* Trigger a state change */ | |
1879 | queue_work(di->chargalg_wq, | |
1880 | &di->chargalg_work); | |
1668f811 | 1881 | break; |
4d3b4aa5 LJ |
1882 | case 2: |
1883 | /* Enable USB charging */ | |
1884 | di->susp_status.usb_suspended = false; | |
1885 | di->susp_status.suspended_change = true; | |
1886 | /* Trigger a state change */ | |
1887 | queue_work(di->chargalg_wq, | |
1888 | &di->chargalg_work); | |
1889 | break; | |
1890 | default: | |
1891 | dev_info(di->dev, "Wrong input\n" | |
1892 | "Enter 0. Disable AC/USB Charging\n" | |
1893 | "1. Enable AC charging\n" | |
1894 | "2. Enable USB Charging\n"); | |
1668f811 AM |
1895 | }; |
1896 | return strlen(buf); | |
1897 | } | |
1898 | ||
4d3b4aa5 LJ |
1899 | static struct abx500_chargalg_sysfs_entry abx500_chargalg_en_charger = |
1900 | __ATTR(chargalg, 0644, abx500_chargalg_en_show, | |
1901 | abx500_chargalg_en_store); | |
1902 | ||
1903 | static struct abx500_chargalg_sysfs_entry abx500_chargalg_curr_step = | |
1904 | __ATTR(chargalg_curr_step, 0644, abx500_chargalg_curr_step_show, | |
1905 | abx500_chargalg_curr_step_store); | |
1906 | ||
1907 | static ssize_t abx500_chargalg_sysfs_show(struct kobject *kobj, | |
1908 | struct attribute *attr, char *buf) | |
1909 | { | |
1910 | struct abx500_chargalg_sysfs_entry *entry = container_of(attr, | |
1911 | struct abx500_chargalg_sysfs_entry, attr); | |
1912 | ||
1913 | struct abx500_chargalg *di = container_of(kobj, | |
1914 | struct abx500_chargalg, chargalg_kobject); | |
1915 | ||
1916 | if (!entry->show) | |
1917 | return -EIO; | |
1918 | ||
1919 | return entry->show(di, buf); | |
1920 | } | |
1921 | ||
1922 | static ssize_t abx500_chargalg_sysfs_charger(struct kobject *kobj, | |
1923 | struct attribute *attr, const char *buf, size_t length) | |
1668f811 | 1924 | { |
4d3b4aa5 LJ |
1925 | struct abx500_chargalg_sysfs_entry *entry = container_of(attr, |
1926 | struct abx500_chargalg_sysfs_entry, attr); | |
1927 | ||
1928 | struct abx500_chargalg *di = container_of(kobj, | |
1929 | struct abx500_chargalg, chargalg_kobject); | |
1930 | ||
1931 | if (!entry->store) | |
1932 | return -EIO; | |
1933 | ||
1934 | return entry->store(di, buf, length); | |
1935 | } | |
1668f811 AM |
1936 | |
1937 | static struct attribute *abx500_chargalg_chg[] = { | |
4d3b4aa5 LJ |
1938 | &abx500_chargalg_en_charger.attr, |
1939 | &abx500_chargalg_curr_step.attr, | |
1940 | NULL, | |
1668f811 AM |
1941 | }; |
1942 | ||
64eb9b02 | 1943 | static const struct sysfs_ops abx500_chargalg_sysfs_ops = { |
c9ade0fc | 1944 | .show = abx500_chargalg_sysfs_show, |
1668f811 AM |
1945 | .store = abx500_chargalg_sysfs_charger, |
1946 | }; | |
1947 | ||
1948 | static struct kobj_type abx500_chargalg_ktype = { | |
1949 | .sysfs_ops = &abx500_chargalg_sysfs_ops, | |
1950 | .default_attrs = abx500_chargalg_chg, | |
1951 | }; | |
1952 | ||
1953 | /** | |
1954 | * abx500_chargalg_sysfs_exit() - de-init of sysfs entry | |
1955 | * @di: pointer to the struct abx500_chargalg | |
1956 | * | |
1957 | * This function removes the entry in sysfs. | |
1958 | */ | |
1959 | static void abx500_chargalg_sysfs_exit(struct abx500_chargalg *di) | |
1960 | { | |
1961 | kobject_del(&di->chargalg_kobject); | |
1962 | } | |
1963 | ||
1964 | /** | |
1965 | * abx500_chargalg_sysfs_init() - init of sysfs entry | |
1966 | * @di: pointer to the struct abx500_chargalg | |
1967 | * | |
1968 | * This function adds an entry in sysfs. | |
1969 | * Returns error code in case of failure else 0(on success) | |
1970 | */ | |
1971 | static int abx500_chargalg_sysfs_init(struct abx500_chargalg *di) | |
1972 | { | |
1973 | int ret = 0; | |
1974 | ||
1975 | ret = kobject_init_and_add(&di->chargalg_kobject, | |
1976 | &abx500_chargalg_ktype, | |
1977 | NULL, "abx500_chargalg"); | |
1978 | if (ret < 0) | |
1979 | dev_err(di->dev, "failed to create sysfs entry\n"); | |
1980 | ||
1981 | return ret; | |
1982 | } | |
1983 | /* Exposure to the sysfs interface <<END>> */ | |
1984 | ||
1985 | #if defined(CONFIG_PM) | |
1986 | static int abx500_chargalg_resume(struct platform_device *pdev) | |
1987 | { | |
1988 | struct abx500_chargalg *di = platform_get_drvdata(pdev); | |
1989 | ||
1990 | /* Kick charger watchdog if charging (any charger online) */ | |
1991 | if (di->chg_info.online_chg) | |
1992 | queue_delayed_work(di->chargalg_wq, &di->chargalg_wd_work, 0); | |
1993 | ||
1994 | /* | |
1995 | * Run the charging algorithm directly to be sure we don't | |
1996 | * do it too seldom | |
1997 | */ | |
1998 | queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0); | |
1999 | ||
2000 | return 0; | |
2001 | } | |
2002 | ||
2003 | static int abx500_chargalg_suspend(struct platform_device *pdev, | |
2004 | pm_message_t state) | |
2005 | { | |
2006 | struct abx500_chargalg *di = platform_get_drvdata(pdev); | |
2007 | ||
2008 | if (di->chg_info.online_chg) | |
2009 | cancel_delayed_work_sync(&di->chargalg_wd_work); | |
2010 | ||
2011 | cancel_delayed_work_sync(&di->chargalg_periodic_work); | |
2012 | ||
2013 | return 0; | |
2014 | } | |
2015 | #else | |
2016 | #define abx500_chargalg_suspend NULL | |
2017 | #define abx500_chargalg_resume NULL | |
2018 | #endif | |
2019 | ||
415ec69f | 2020 | static int abx500_chargalg_remove(struct platform_device *pdev) |
1668f811 AM |
2021 | { |
2022 | struct abx500_chargalg *di = platform_get_drvdata(pdev); | |
2023 | ||
2024 | /* sysfs interface to enable/disbale charging from user space */ | |
2025 | abx500_chargalg_sysfs_exit(di); | |
2026 | ||
257107ae LJ |
2027 | hrtimer_cancel(&di->safety_timer); |
2028 | hrtimer_cancel(&di->maintenance_timer); | |
2029 | ||
2030 | cancel_delayed_work_sync(&di->chargalg_periodic_work); | |
2031 | cancel_delayed_work_sync(&di->chargalg_wd_work); | |
2032 | cancel_work_sync(&di->chargalg_work); | |
2033 | ||
1668f811 AM |
2034 | /* Delete the work queue */ |
2035 | destroy_workqueue(di->chargalg_wq); | |
2036 | ||
1668f811 AM |
2037 | power_supply_unregister(&di->chargalg_psy); |
2038 | platform_set_drvdata(pdev, NULL); | |
1668f811 AM |
2039 | |
2040 | return 0; | |
2041 | } | |
2042 | ||
a12810ab R |
2043 | static char *supply_interface[] = { |
2044 | "ab8500_fg", | |
2045 | }; | |
2046 | ||
c8afa640 | 2047 | static int abx500_chargalg_probe(struct platform_device *pdev) |
1668f811 | 2048 | { |
a12810ab | 2049 | struct device_node *np = pdev->dev.of_node; |
bdc56b44 | 2050 | struct abx500_bm_data *plat = pdev->dev.platform_data; |
a12810ab | 2051 | struct abx500_chargalg *di; |
1668f811 AM |
2052 | int ret = 0; |
2053 | ||
a12810ab R |
2054 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
2055 | if (!di) { | |
2056 | dev_err(&pdev->dev, "%s no mem for ab8500_chargalg\n", __func__); | |
1668f811 | 2057 | return -ENOMEM; |
a12810ab | 2058 | } |
bdc56b44 LJ |
2059 | |
2060 | if (!plat) { | |
2061 | dev_err(&pdev->dev, "no battery management data supplied\n"); | |
2062 | return -EINVAL; | |
2063 | } | |
2064 | di->bm = plat; | |
2065 | ||
2066 | if (np) { | |
2067 | ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm); | |
2068 | if (ret) { | |
2069 | dev_err(&pdev->dev, "failed to get battery information\n"); | |
2070 | return ret; | |
a12810ab | 2071 | } |
a12810ab | 2072 | } |
1668f811 | 2073 | |
330b7ebf | 2074 | /* get device struct and parent */ |
1668f811 | 2075 | di->dev = &pdev->dev; |
330b7ebf | 2076 | di->parent = dev_get_drvdata(pdev->dev.parent); |
1668f811 AM |
2077 | |
2078 | /* chargalg supply */ | |
2079 | di->chargalg_psy.name = "abx500_chargalg"; | |
2080 | di->chargalg_psy.type = POWER_SUPPLY_TYPE_BATTERY; | |
2081 | di->chargalg_psy.properties = abx500_chargalg_props; | |
2082 | di->chargalg_psy.num_properties = ARRAY_SIZE(abx500_chargalg_props); | |
2083 | di->chargalg_psy.get_property = abx500_chargalg_get_property; | |
a12810ab R |
2084 | di->chargalg_psy.supplied_to = supply_interface; |
2085 | di->chargalg_psy.num_supplicants = ARRAY_SIZE(supply_interface), | |
1668f811 AM |
2086 | di->chargalg_psy.external_power_changed = |
2087 | abx500_chargalg_external_power_changed; | |
2088 | ||
2089 | /* Initilialize safety timer */ | |
257107ae | 2090 | hrtimer_init(&di->safety_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
1668f811 | 2091 | di->safety_timer.function = abx500_chargalg_safety_timer_expired; |
1668f811 AM |
2092 | |
2093 | /* Initilialize maintenance timer */ | |
257107ae | 2094 | hrtimer_init(&di->maintenance_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
1668f811 AM |
2095 | di->maintenance_timer.function = |
2096 | abx500_chargalg_maintenance_timer_expired; | |
1668f811 AM |
2097 | |
2098 | /* Create a work queue for the chargalg */ | |
2099 | di->chargalg_wq = | |
2100 | create_singlethread_workqueue("abx500_chargalg_wq"); | |
2101 | if (di->chargalg_wq == NULL) { | |
2102 | dev_err(di->dev, "failed to create work queue\n"); | |
a12810ab | 2103 | return -ENOMEM; |
1668f811 AM |
2104 | } |
2105 | ||
2106 | /* Init work for chargalg */ | |
203b42f7 | 2107 | INIT_DEFERRABLE_WORK(&di->chargalg_periodic_work, |
1668f811 | 2108 | abx500_chargalg_periodic_work); |
203b42f7 | 2109 | INIT_DEFERRABLE_WORK(&di->chargalg_wd_work, |
1668f811 AM |
2110 | abx500_chargalg_wd_work); |
2111 | ||
2112 | /* Init work for chargalg */ | |
2113 | INIT_WORK(&di->chargalg_work, abx500_chargalg_work); | |
2114 | ||
2115 | /* To detect charger at startup */ | |
2116 | di->chg_info.prev_conn_chg = -1; | |
2117 | ||
2118 | /* Register chargalg power supply class */ | |
2119 | ret = power_supply_register(di->dev, &di->chargalg_psy); | |
2120 | if (ret) { | |
2121 | dev_err(di->dev, "failed to register chargalg psy\n"); | |
2122 | goto free_chargalg_wq; | |
2123 | } | |
2124 | ||
2125 | platform_set_drvdata(pdev, di); | |
2126 | ||
2127 | /* sysfs interface to enable/disable charging from user space */ | |
2128 | ret = abx500_chargalg_sysfs_init(di); | |
2129 | if (ret) { | |
2130 | dev_err(di->dev, "failed to create sysfs entry\n"); | |
2131 | goto free_psy; | |
2132 | } | |
4d3b4aa5 | 2133 | di->curr_status.curr_step = CHARGALG_CURR_STEP_HIGH; |
1668f811 AM |
2134 | |
2135 | /* Run the charging algorithm */ | |
2136 | queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0); | |
2137 | ||
2138 | dev_info(di->dev, "probe success\n"); | |
2139 | return ret; | |
2140 | ||
2141 | free_psy: | |
2142 | power_supply_unregister(&di->chargalg_psy); | |
2143 | free_chargalg_wq: | |
2144 | destroy_workqueue(di->chargalg_wq); | |
1668f811 AM |
2145 | return ret; |
2146 | } | |
2147 | ||
a12810ab R |
2148 | static const struct of_device_id ab8500_chargalg_match[] = { |
2149 | { .compatible = "stericsson,ab8500-chargalg", }, | |
2150 | { }, | |
2151 | }; | |
2152 | ||
1668f811 AM |
2153 | static struct platform_driver abx500_chargalg_driver = { |
2154 | .probe = abx500_chargalg_probe, | |
28ea73f4 | 2155 | .remove = abx500_chargalg_remove, |
1668f811 AM |
2156 | .suspend = abx500_chargalg_suspend, |
2157 | .resume = abx500_chargalg_resume, | |
2158 | .driver = { | |
a12810ab | 2159 | .name = "ab8500-chargalg", |
1668f811 | 2160 | .owner = THIS_MODULE, |
a12810ab | 2161 | .of_match_table = ab8500_chargalg_match, |
1668f811 AM |
2162 | }, |
2163 | }; | |
2164 | ||
1ee26af0 | 2165 | module_platform_driver(abx500_chargalg_driver); |
1668f811 AM |
2166 | |
2167 | MODULE_LICENSE("GPL v2"); | |
2168 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski"); | |
2169 | MODULE_ALIAS("platform:abx500-chargalg"); | |
2170 | MODULE_DESCRIPTION("abx500 battery charging algorithm"); |