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1 | /* |
2 | * Copyright (C) ST-Ericsson SA 2012 | |
3 | * | |
4 | * Charging algorithm driver for abx500 variants | |
5 | * | |
6 | * License Terms: GNU General Public License v2 | |
7 | * Authors: | |
8 | * Johan Palsson <johan.palsson@stericsson.com> | |
9 | * Karl Komierowski <karl.komierowski@stericsson.com> | |
10 | * Arun R Murthy <arun.murthy@stericsson.com> | |
11 | */ | |
12 | ||
13 | #include <linux/init.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/device.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/power_supply.h> | |
21 | #include <linux/completion.h> | |
22 | #include <linux/workqueue.h> | |
23 | #include <linux/kobject.h> | |
24 | #include <linux/mfd/abx500.h> | |
25 | #include <linux/mfd/abx500/ux500_chargalg.h> | |
26 | #include <linux/mfd/abx500/ab8500-bm.h> | |
27 | ||
28 | /* Watchdog kick interval */ | |
29 | #define CHG_WD_INTERVAL (6 * HZ) | |
30 | ||
31 | /* End-of-charge criteria counter */ | |
32 | #define EOC_COND_CNT 10 | |
33 | ||
34 | /* Recharge criteria counter */ | |
35 | #define RCH_COND_CNT 3 | |
36 | ||
37 | #define to_abx500_chargalg_device_info(x) container_of((x), \ | |
38 | struct abx500_chargalg, chargalg_psy); | |
39 | ||
40 | enum abx500_chargers { | |
41 | NO_CHG, | |
42 | AC_CHG, | |
43 | USB_CHG, | |
44 | }; | |
45 | ||
46 | struct abx500_chargalg_charger_info { | |
47 | enum abx500_chargers conn_chg; | |
48 | enum abx500_chargers prev_conn_chg; | |
49 | enum abx500_chargers online_chg; | |
50 | enum abx500_chargers prev_online_chg; | |
51 | enum abx500_chargers charger_type; | |
52 | bool usb_chg_ok; | |
53 | bool ac_chg_ok; | |
54 | int usb_volt; | |
55 | int usb_curr; | |
56 | int ac_volt; | |
57 | int ac_curr; | |
58 | int usb_vset; | |
59 | int usb_iset; | |
60 | int ac_vset; | |
61 | int ac_iset; | |
62 | }; | |
63 | ||
64 | struct abx500_chargalg_suspension_status { | |
65 | bool suspended_change; | |
66 | bool ac_suspended; | |
67 | bool usb_suspended; | |
68 | }; | |
69 | ||
70 | struct abx500_chargalg_battery_data { | |
71 | int temp; | |
72 | int volt; | |
73 | int avg_curr; | |
74 | int inst_curr; | |
75 | int percent; | |
76 | }; | |
77 | ||
78 | enum abx500_chargalg_states { | |
79 | STATE_HANDHELD_INIT, | |
80 | STATE_HANDHELD, | |
81 | STATE_CHG_NOT_OK_INIT, | |
82 | STATE_CHG_NOT_OK, | |
83 | STATE_HW_TEMP_PROTECT_INIT, | |
84 | STATE_HW_TEMP_PROTECT, | |
85 | STATE_NORMAL_INIT, | |
86 | STATE_NORMAL, | |
87 | STATE_WAIT_FOR_RECHARGE_INIT, | |
88 | STATE_WAIT_FOR_RECHARGE, | |
89 | STATE_MAINTENANCE_A_INIT, | |
90 | STATE_MAINTENANCE_A, | |
91 | STATE_MAINTENANCE_B_INIT, | |
92 | STATE_MAINTENANCE_B, | |
93 | STATE_TEMP_UNDEROVER_INIT, | |
94 | STATE_TEMP_UNDEROVER, | |
95 | STATE_TEMP_LOWHIGH_INIT, | |
96 | STATE_TEMP_LOWHIGH, | |
97 | STATE_SUSPENDED_INIT, | |
98 | STATE_SUSPENDED, | |
99 | STATE_OVV_PROTECT_INIT, | |
100 | STATE_OVV_PROTECT, | |
101 | STATE_SAFETY_TIMER_EXPIRED_INIT, | |
102 | STATE_SAFETY_TIMER_EXPIRED, | |
103 | STATE_BATT_REMOVED_INIT, | |
104 | STATE_BATT_REMOVED, | |
105 | STATE_WD_EXPIRED_INIT, | |
106 | STATE_WD_EXPIRED, | |
107 | }; | |
108 | ||
109 | static const char *states[] = { | |
110 | "HANDHELD_INIT", | |
111 | "HANDHELD", | |
112 | "CHG_NOT_OK_INIT", | |
113 | "CHG_NOT_OK", | |
114 | "HW_TEMP_PROTECT_INIT", | |
115 | "HW_TEMP_PROTECT", | |
116 | "NORMAL_INIT", | |
117 | "NORMAL", | |
118 | "WAIT_FOR_RECHARGE_INIT", | |
119 | "WAIT_FOR_RECHARGE", | |
120 | "MAINTENANCE_A_INIT", | |
121 | "MAINTENANCE_A", | |
122 | "MAINTENANCE_B_INIT", | |
123 | "MAINTENANCE_B", | |
124 | "TEMP_UNDEROVER_INIT", | |
125 | "TEMP_UNDEROVER", | |
126 | "TEMP_LOWHIGH_INIT", | |
127 | "TEMP_LOWHIGH", | |
128 | "SUSPENDED_INIT", | |
129 | "SUSPENDED", | |
130 | "OVV_PROTECT_INIT", | |
131 | "OVV_PROTECT", | |
132 | "SAFETY_TIMER_EXPIRED_INIT", | |
133 | "SAFETY_TIMER_EXPIRED", | |
134 | "BATT_REMOVED_INIT", | |
135 | "BATT_REMOVED", | |
136 | "WD_EXPIRED_INIT", | |
137 | "WD_EXPIRED", | |
138 | }; | |
139 | ||
140 | struct abx500_chargalg_events { | |
141 | bool batt_unknown; | |
142 | bool mainextchnotok; | |
143 | bool batt_ovv; | |
144 | bool batt_rem; | |
145 | bool btemp_underover; | |
146 | bool btemp_lowhigh; | |
147 | bool main_thermal_prot; | |
148 | bool usb_thermal_prot; | |
149 | bool main_ovv; | |
150 | bool vbus_ovv; | |
151 | bool usbchargernotok; | |
152 | bool safety_timer_expired; | |
153 | bool maintenance_timer_expired; | |
154 | bool ac_wd_expired; | |
155 | bool usb_wd_expired; | |
156 | bool ac_cv_active; | |
157 | bool usb_cv_active; | |
158 | bool vbus_collapsed; | |
159 | }; | |
160 | ||
161 | /** | |
162 | * struct abx500_charge_curr_maximization - Charger maximization parameters | |
163 | * @original_iset: the non optimized/maximised charger current | |
164 | * @current_iset: the charging current used at this moment | |
165 | * @test_delta_i: the delta between the current we want to charge and the | |
166 | current that is really going into the battery | |
167 | * @condition_cnt: number of iterations needed before a new charger current | |
168 | is set | |
169 | * @max_current: maximum charger current | |
170 | * @wait_cnt: to avoid too fast current step down in case of charger | |
171 | * voltage collapse, we insert this delay between step | |
172 | * down | |
173 | * @level: tells in how many steps the charging current has been | |
174 | increased | |
175 | */ | |
176 | struct abx500_charge_curr_maximization { | |
177 | int original_iset; | |
178 | int current_iset; | |
179 | int test_delta_i; | |
180 | int condition_cnt; | |
181 | int max_current; | |
182 | int wait_cnt; | |
183 | u8 level; | |
184 | }; | |
185 | ||
186 | enum maxim_ret { | |
187 | MAXIM_RET_NOACTION, | |
188 | MAXIM_RET_CHANGE, | |
189 | MAXIM_RET_IBAT_TOO_HIGH, | |
190 | }; | |
191 | ||
192 | /** | |
193 | * struct abx500_chargalg - abx500 Charging algorithm device information | |
194 | * @dev: pointer to the structure device | |
195 | * @charge_status: battery operating status | |
196 | * @eoc_cnt: counter used to determine end-of_charge | |
197 | * @rch_cnt: counter used to determine start of recharge | |
198 | * @maintenance_chg: indicate if maintenance charge is active | |
199 | * @t_hyst_norm temperature hysteresis when the temperature has been | |
200 | * over or under normal limits | |
201 | * @t_hyst_lowhigh temperature hysteresis when the temperature has been | |
202 | * over or under the high or low limits | |
203 | * @charge_state: current state of the charging algorithm | |
204 | * @ccm charging current maximization parameters | |
205 | * @chg_info: information about connected charger types | |
206 | * @batt_data: data of the battery | |
207 | * @susp_status: current charger suspension status | |
208 | * @pdata: pointer to the abx500_chargalg platform data | |
209 | * @bat: pointer to the abx500_bm platform data | |
210 | * @chargalg_psy: structure that holds the battery properties exposed by | |
211 | * the charging algorithm | |
212 | * @events: structure for information about events triggered | |
213 | * @chargalg_wq: work queue for running the charging algorithm | |
214 | * @chargalg_periodic_work: work to run the charging algorithm periodically | |
215 | * @chargalg_wd_work: work to kick the charger watchdog periodically | |
216 | * @chargalg_work: work to run the charging algorithm instantly | |
217 | * @safety_timer: charging safety timer | |
218 | * @maintenance_timer: maintenance charging timer | |
219 | * @chargalg_kobject: structure of type kobject | |
220 | */ | |
221 | struct abx500_chargalg { | |
222 | struct device *dev; | |
223 | int charge_status; | |
224 | int eoc_cnt; | |
225 | int rch_cnt; | |
226 | bool maintenance_chg; | |
227 | int t_hyst_norm; | |
228 | int t_hyst_lowhigh; | |
229 | enum abx500_chargalg_states charge_state; | |
230 | struct abx500_charge_curr_maximization ccm; | |
231 | struct abx500_chargalg_charger_info chg_info; | |
232 | struct abx500_chargalg_battery_data batt_data; | |
233 | struct abx500_chargalg_suspension_status susp_status; | |
234 | struct abx500_chargalg_platform_data *pdata; | |
235 | struct abx500_bm_data *bat; | |
236 | struct power_supply chargalg_psy; | |
237 | struct ux500_charger *ac_chg; | |
238 | struct ux500_charger *usb_chg; | |
239 | struct abx500_chargalg_events events; | |
240 | struct workqueue_struct *chargalg_wq; | |
241 | struct delayed_work chargalg_periodic_work; | |
242 | struct delayed_work chargalg_wd_work; | |
243 | struct work_struct chargalg_work; | |
244 | struct timer_list safety_timer; | |
245 | struct timer_list maintenance_timer; | |
246 | struct kobject chargalg_kobject; | |
247 | }; | |
248 | ||
249 | /* Main battery properties */ | |
250 | static enum power_supply_property abx500_chargalg_props[] = { | |
251 | POWER_SUPPLY_PROP_STATUS, | |
252 | POWER_SUPPLY_PROP_HEALTH, | |
253 | }; | |
254 | ||
255 | /** | |
256 | * abx500_chargalg_safety_timer_expired() - Expiration of the safety timer | |
257 | * @data: pointer to the abx500_chargalg structure | |
258 | * | |
259 | * This function gets called when the safety timer for the charger | |
260 | * expires | |
261 | */ | |
262 | static void abx500_chargalg_safety_timer_expired(unsigned long data) | |
263 | { | |
264 | struct abx500_chargalg *di = (struct abx500_chargalg *) data; | |
265 | dev_err(di->dev, "Safety timer expired\n"); | |
266 | di->events.safety_timer_expired = true; | |
267 | ||
268 | /* Trigger execution of the algorithm instantly */ | |
269 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
270 | } | |
271 | ||
272 | /** | |
273 | * abx500_chargalg_maintenance_timer_expired() - Expiration of | |
274 | * the maintenance timer | |
275 | * @i: pointer to the abx500_chargalg structure | |
276 | * | |
277 | * This function gets called when the maintenence timer | |
278 | * expires | |
279 | */ | |
280 | static void abx500_chargalg_maintenance_timer_expired(unsigned long data) | |
281 | { | |
282 | ||
283 | struct abx500_chargalg *di = (struct abx500_chargalg *) data; | |
284 | dev_dbg(di->dev, "Maintenance timer expired\n"); | |
285 | di->events.maintenance_timer_expired = true; | |
286 | ||
287 | /* Trigger execution of the algorithm instantly */ | |
288 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
289 | } | |
290 | ||
291 | /** | |
292 | * abx500_chargalg_state_to() - Change charge state | |
293 | * @di: pointer to the abx500_chargalg structure | |
294 | * | |
295 | * This function gets called when a charge state change should occur | |
296 | */ | |
297 | static void abx500_chargalg_state_to(struct abx500_chargalg *di, | |
298 | enum abx500_chargalg_states state) | |
299 | { | |
300 | dev_dbg(di->dev, | |
301 | "State changed: %s (From state: [%d] %s =to=> [%d] %s )\n", | |
302 | di->charge_state == state ? "NO" : "YES", | |
303 | di->charge_state, | |
304 | states[di->charge_state], | |
305 | state, | |
306 | states[state]); | |
307 | ||
308 | di->charge_state = state; | |
309 | } | |
310 | ||
311 | /** | |
312 | * abx500_chargalg_check_charger_connection() - Check charger connection change | |
313 | * @di: pointer to the abx500_chargalg structure | |
314 | * | |
315 | * This function will check if there is a change in the charger connection | |
316 | * and change charge state accordingly. AC has precedence over USB. | |
317 | */ | |
318 | static int abx500_chargalg_check_charger_connection(struct abx500_chargalg *di) | |
319 | { | |
320 | if (di->chg_info.conn_chg != di->chg_info.prev_conn_chg || | |
321 | di->susp_status.suspended_change) { | |
322 | /* | |
323 | * Charger state changed or suspension | |
324 | * has changed since last update | |
325 | */ | |
326 | if ((di->chg_info.conn_chg & AC_CHG) && | |
327 | !di->susp_status.ac_suspended) { | |
328 | dev_dbg(di->dev, "Charging source is AC\n"); | |
329 | if (di->chg_info.charger_type != AC_CHG) { | |
330 | di->chg_info.charger_type = AC_CHG; | |
331 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
332 | } | |
333 | } else if ((di->chg_info.conn_chg & USB_CHG) && | |
334 | !di->susp_status.usb_suspended) { | |
335 | dev_dbg(di->dev, "Charging source is USB\n"); | |
336 | di->chg_info.charger_type = USB_CHG; | |
337 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
338 | } else if (di->chg_info.conn_chg && | |
339 | (di->susp_status.ac_suspended || | |
340 | di->susp_status.usb_suspended)) { | |
341 | dev_dbg(di->dev, "Charging is suspended\n"); | |
342 | di->chg_info.charger_type = NO_CHG; | |
343 | abx500_chargalg_state_to(di, STATE_SUSPENDED_INIT); | |
344 | } else { | |
345 | dev_dbg(di->dev, "Charging source is OFF\n"); | |
346 | di->chg_info.charger_type = NO_CHG; | |
347 | abx500_chargalg_state_to(di, STATE_HANDHELD_INIT); | |
348 | } | |
349 | di->chg_info.prev_conn_chg = di->chg_info.conn_chg; | |
350 | di->susp_status.suspended_change = false; | |
351 | } | |
352 | return di->chg_info.conn_chg; | |
353 | } | |
354 | ||
355 | /** | |
356 | * abx500_chargalg_start_safety_timer() - Start charging safety timer | |
357 | * @di: pointer to the abx500_chargalg structure | |
358 | * | |
359 | * The safety timer is used to avoid overcharging of old or bad batteries. | |
360 | * There are different timers for AC and USB | |
361 | */ | |
362 | static void abx500_chargalg_start_safety_timer(struct abx500_chargalg *di) | |
363 | { | |
364 | unsigned long timer_expiration = 0; | |
365 | ||
366 | switch (di->chg_info.charger_type) { | |
367 | case AC_CHG: | |
368 | timer_expiration = | |
369 | round_jiffies(jiffies + | |
370 | (di->bat->main_safety_tmr_h * 3600 * HZ)); | |
371 | break; | |
372 | ||
373 | case USB_CHG: | |
374 | timer_expiration = | |
375 | round_jiffies(jiffies + | |
376 | (di->bat->usb_safety_tmr_h * 3600 * HZ)); | |
377 | break; | |
378 | ||
379 | default: | |
380 | dev_err(di->dev, "Unknown charger to charge from\n"); | |
381 | break; | |
382 | } | |
383 | ||
384 | di->events.safety_timer_expired = false; | |
385 | di->safety_timer.expires = timer_expiration; | |
386 | if (!timer_pending(&di->safety_timer)) | |
387 | add_timer(&di->safety_timer); | |
388 | else | |
389 | mod_timer(&di->safety_timer, timer_expiration); | |
390 | } | |
391 | ||
392 | /** | |
393 | * abx500_chargalg_stop_safety_timer() - Stop charging safety timer | |
394 | * @di: pointer to the abx500_chargalg structure | |
395 | * | |
396 | * The safety timer is stopped whenever the NORMAL state is exited | |
397 | */ | |
398 | static void abx500_chargalg_stop_safety_timer(struct abx500_chargalg *di) | |
399 | { | |
400 | di->events.safety_timer_expired = false; | |
401 | del_timer(&di->safety_timer); | |
402 | } | |
403 | ||
404 | /** | |
405 | * abx500_chargalg_start_maintenance_timer() - Start charging maintenance timer | |
406 | * @di: pointer to the abx500_chargalg structure | |
407 | * @duration: duration of ther maintenance timer in hours | |
408 | * | |
409 | * The maintenance timer is used to maintain the charge in the battery once | |
410 | * the battery is considered full. These timers are chosen to match the | |
411 | * discharge curve of the battery | |
412 | */ | |
413 | static void abx500_chargalg_start_maintenance_timer(struct abx500_chargalg *di, | |
414 | int duration) | |
415 | { | |
416 | unsigned long timer_expiration; | |
417 | ||
418 | /* Convert from hours to jiffies */ | |
419 | timer_expiration = round_jiffies(jiffies + (duration * 3600 * HZ)); | |
420 | ||
421 | di->events.maintenance_timer_expired = false; | |
422 | di->maintenance_timer.expires = timer_expiration; | |
423 | if (!timer_pending(&di->maintenance_timer)) | |
424 | add_timer(&di->maintenance_timer); | |
425 | else | |
426 | mod_timer(&di->maintenance_timer, timer_expiration); | |
427 | } | |
428 | ||
429 | /** | |
430 | * abx500_chargalg_stop_maintenance_timer() - Stop maintenance timer | |
431 | * @di: pointer to the abx500_chargalg structure | |
432 | * | |
433 | * The maintenance timer is stopped whenever maintenance ends or when another | |
434 | * state is entered | |
435 | */ | |
436 | static void abx500_chargalg_stop_maintenance_timer(struct abx500_chargalg *di) | |
437 | { | |
438 | di->events.maintenance_timer_expired = false; | |
439 | del_timer(&di->maintenance_timer); | |
440 | } | |
441 | ||
442 | /** | |
443 | * abx500_chargalg_kick_watchdog() - Kick charger watchdog | |
444 | * @di: pointer to the abx500_chargalg structure | |
445 | * | |
446 | * The charger watchdog have to be kicked periodically whenever the charger is | |
447 | * on, else the ABB will reset the system | |
448 | */ | |
449 | static int abx500_chargalg_kick_watchdog(struct abx500_chargalg *di) | |
450 | { | |
451 | /* Check if charger exists and kick watchdog if charging */ | |
452 | if (di->ac_chg && di->ac_chg->ops.kick_wd && | |
453 | di->chg_info.online_chg & AC_CHG) | |
454 | return di->ac_chg->ops.kick_wd(di->ac_chg); | |
455 | else if (di->usb_chg && di->usb_chg->ops.kick_wd && | |
456 | di->chg_info.online_chg & USB_CHG) | |
457 | return di->usb_chg->ops.kick_wd(di->usb_chg); | |
458 | ||
459 | return -ENXIO; | |
460 | } | |
461 | ||
462 | /** | |
463 | * abx500_chargalg_ac_en() - Turn on/off the AC charger | |
464 | * @di: pointer to the abx500_chargalg structure | |
465 | * @enable: charger on/off | |
466 | * @vset: requested charger output voltage | |
467 | * @iset: requested charger output current | |
468 | * | |
469 | * The AC charger will be turned on/off with the requested charge voltage and | |
470 | * current | |
471 | */ | |
472 | static int abx500_chargalg_ac_en(struct abx500_chargalg *di, int enable, | |
473 | int vset, int iset) | |
474 | { | |
475 | if (!di->ac_chg || !di->ac_chg->ops.enable) | |
476 | return -ENXIO; | |
477 | ||
478 | /* Select maximum of what both the charger and the battery supports */ | |
479 | if (di->ac_chg->max_out_volt) | |
480 | vset = min(vset, di->ac_chg->max_out_volt); | |
481 | if (di->ac_chg->max_out_curr) | |
482 | iset = min(iset, di->ac_chg->max_out_curr); | |
483 | ||
484 | di->chg_info.ac_iset = iset; | |
485 | di->chg_info.ac_vset = vset; | |
486 | ||
487 | return di->ac_chg->ops.enable(di->ac_chg, enable, vset, iset); | |
488 | } | |
489 | ||
490 | /** | |
491 | * abx500_chargalg_usb_en() - Turn on/off the USB charger | |
492 | * @di: pointer to the abx500_chargalg structure | |
493 | * @enable: charger on/off | |
494 | * @vset: requested charger output voltage | |
495 | * @iset: requested charger output current | |
496 | * | |
497 | * The USB charger will be turned on/off with the requested charge voltage and | |
498 | * current | |
499 | */ | |
500 | static int abx500_chargalg_usb_en(struct abx500_chargalg *di, int enable, | |
501 | int vset, int iset) | |
502 | { | |
503 | if (!di->usb_chg || !di->usb_chg->ops.enable) | |
504 | return -ENXIO; | |
505 | ||
506 | /* Select maximum of what both the charger and the battery supports */ | |
507 | if (di->usb_chg->max_out_volt) | |
508 | vset = min(vset, di->usb_chg->max_out_volt); | |
509 | if (di->usb_chg->max_out_curr) | |
510 | iset = min(iset, di->usb_chg->max_out_curr); | |
511 | ||
512 | di->chg_info.usb_iset = iset; | |
513 | di->chg_info.usb_vset = vset; | |
514 | ||
515 | return di->usb_chg->ops.enable(di->usb_chg, enable, vset, iset); | |
516 | } | |
517 | ||
518 | /** | |
519 | * abx500_chargalg_update_chg_curr() - Update charger current | |
520 | * @di: pointer to the abx500_chargalg structure | |
521 | * @iset: requested charger output current | |
522 | * | |
523 | * The charger output current will be updated for the charger | |
524 | * that is currently in use | |
525 | */ | |
526 | static int abx500_chargalg_update_chg_curr(struct abx500_chargalg *di, | |
527 | int iset) | |
528 | { | |
529 | /* Check if charger exists and update current if charging */ | |
530 | if (di->ac_chg && di->ac_chg->ops.update_curr && | |
531 | di->chg_info.charger_type & AC_CHG) { | |
532 | /* | |
533 | * Select maximum of what both the charger | |
534 | * and the battery supports | |
535 | */ | |
536 | if (di->ac_chg->max_out_curr) | |
537 | iset = min(iset, di->ac_chg->max_out_curr); | |
538 | ||
539 | di->chg_info.ac_iset = iset; | |
540 | ||
541 | return di->ac_chg->ops.update_curr(di->ac_chg, iset); | |
542 | } else if (di->usb_chg && di->usb_chg->ops.update_curr && | |
543 | di->chg_info.charger_type & USB_CHG) { | |
544 | /* | |
545 | * Select maximum of what both the charger | |
546 | * and the battery supports | |
547 | */ | |
548 | if (di->usb_chg->max_out_curr) | |
549 | iset = min(iset, di->usb_chg->max_out_curr); | |
550 | ||
551 | di->chg_info.usb_iset = iset; | |
552 | ||
553 | return di->usb_chg->ops.update_curr(di->usb_chg, iset); | |
554 | } | |
555 | ||
556 | return -ENXIO; | |
557 | } | |
558 | ||
559 | /** | |
560 | * abx500_chargalg_stop_charging() - Stop charging | |
561 | * @di: pointer to the abx500_chargalg structure | |
562 | * | |
563 | * This function is called from any state where charging should be stopped. | |
564 | * All charging is disabled and all status parameters and timers are changed | |
565 | * accordingly | |
566 | */ | |
567 | static void abx500_chargalg_stop_charging(struct abx500_chargalg *di) | |
568 | { | |
569 | abx500_chargalg_ac_en(di, false, 0, 0); | |
570 | abx500_chargalg_usb_en(di, false, 0, 0); | |
571 | abx500_chargalg_stop_safety_timer(di); | |
572 | abx500_chargalg_stop_maintenance_timer(di); | |
573 | di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
574 | di->maintenance_chg = false; | |
575 | cancel_delayed_work(&di->chargalg_wd_work); | |
576 | power_supply_changed(&di->chargalg_psy); | |
577 | } | |
578 | ||
579 | /** | |
580 | * abx500_chargalg_hold_charging() - Pauses charging | |
581 | * @di: pointer to the abx500_chargalg structure | |
582 | * | |
583 | * This function is called in the case where maintenance charging has been | |
584 | * disabled and instead a battery voltage mode is entered to check when the | |
585 | * battery voltage has reached a certain recharge voltage | |
586 | */ | |
587 | static void abx500_chargalg_hold_charging(struct abx500_chargalg *di) | |
588 | { | |
589 | abx500_chargalg_ac_en(di, false, 0, 0); | |
590 | abx500_chargalg_usb_en(di, false, 0, 0); | |
591 | abx500_chargalg_stop_safety_timer(di); | |
592 | abx500_chargalg_stop_maintenance_timer(di); | |
593 | di->charge_status = POWER_SUPPLY_STATUS_CHARGING; | |
594 | di->maintenance_chg = false; | |
595 | cancel_delayed_work(&di->chargalg_wd_work); | |
596 | power_supply_changed(&di->chargalg_psy); | |
597 | } | |
598 | ||
599 | /** | |
600 | * abx500_chargalg_start_charging() - Start the charger | |
601 | * @di: pointer to the abx500_chargalg structure | |
602 | * @vset: requested charger output voltage | |
603 | * @iset: requested charger output current | |
604 | * | |
605 | * A charger will be enabled depending on the requested charger type that was | |
606 | * detected previously. | |
607 | */ | |
608 | static void abx500_chargalg_start_charging(struct abx500_chargalg *di, | |
609 | int vset, int iset) | |
610 | { | |
611 | switch (di->chg_info.charger_type) { | |
612 | case AC_CHG: | |
613 | dev_dbg(di->dev, | |
614 | "AC parameters: Vset %d, Ich %d\n", vset, iset); | |
615 | abx500_chargalg_usb_en(di, false, 0, 0); | |
616 | abx500_chargalg_ac_en(di, true, vset, iset); | |
617 | break; | |
618 | ||
619 | case USB_CHG: | |
620 | dev_dbg(di->dev, | |
621 | "USB parameters: Vset %d, Ich %d\n", vset, iset); | |
622 | abx500_chargalg_ac_en(di, false, 0, 0); | |
623 | abx500_chargalg_usb_en(di, true, vset, iset); | |
624 | break; | |
625 | ||
626 | default: | |
627 | dev_err(di->dev, "Unknown charger to charge from\n"); | |
628 | break; | |
629 | } | |
630 | } | |
631 | ||
632 | /** | |
633 | * abx500_chargalg_check_temp() - Check battery temperature ranges | |
634 | * @di: pointer to the abx500_chargalg structure | |
635 | * | |
636 | * The battery temperature is checked against the predefined limits and the | |
637 | * charge state is changed accordingly | |
638 | */ | |
639 | static void abx500_chargalg_check_temp(struct abx500_chargalg *di) | |
640 | { | |
641 | if (di->batt_data.temp > (di->bat->temp_low + di->t_hyst_norm) && | |
642 | di->batt_data.temp < (di->bat->temp_high - di->t_hyst_norm)) { | |
643 | /* Temp OK! */ | |
644 | di->events.btemp_underover = false; | |
645 | di->events.btemp_lowhigh = false; | |
646 | di->t_hyst_norm = 0; | |
647 | di->t_hyst_lowhigh = 0; | |
648 | } else { | |
649 | if (((di->batt_data.temp >= di->bat->temp_high) && | |
650 | (di->batt_data.temp < | |
651 | (di->bat->temp_over - di->t_hyst_lowhigh))) || | |
652 | ((di->batt_data.temp > | |
653 | (di->bat->temp_under + di->t_hyst_lowhigh)) && | |
654 | (di->batt_data.temp <= di->bat->temp_low))) { | |
655 | /* TEMP minor!!!!! */ | |
656 | di->events.btemp_underover = false; | |
657 | di->events.btemp_lowhigh = true; | |
658 | di->t_hyst_norm = di->bat->temp_hysteresis; | |
659 | di->t_hyst_lowhigh = 0; | |
660 | } else if (di->batt_data.temp <= di->bat->temp_under || | |
661 | di->batt_data.temp >= di->bat->temp_over) { | |
662 | /* TEMP major!!!!! */ | |
663 | di->events.btemp_underover = true; | |
664 | di->events.btemp_lowhigh = false; | |
665 | di->t_hyst_norm = 0; | |
666 | di->t_hyst_lowhigh = di->bat->temp_hysteresis; | |
667 | } else { | |
668 | /* Within hysteresis */ | |
669 | dev_dbg(di->dev, "Within hysteresis limit temp: %d " | |
670 | "hyst_lowhigh %d, hyst normal %d\n", | |
671 | di->batt_data.temp, di->t_hyst_lowhigh, | |
672 | di->t_hyst_norm); | |
673 | } | |
674 | } | |
675 | } | |
676 | ||
677 | /** | |
678 | * abx500_chargalg_check_charger_voltage() - Check charger voltage | |
679 | * @di: pointer to the abx500_chargalg structure | |
680 | * | |
681 | * Charger voltage is checked against maximum limit | |
682 | */ | |
683 | static void abx500_chargalg_check_charger_voltage(struct abx500_chargalg *di) | |
684 | { | |
685 | if (di->chg_info.usb_volt > di->bat->chg_params->usb_volt_max) | |
686 | di->chg_info.usb_chg_ok = false; | |
687 | else | |
688 | di->chg_info.usb_chg_ok = true; | |
689 | ||
690 | if (di->chg_info.ac_volt > di->bat->chg_params->ac_volt_max) | |
691 | di->chg_info.ac_chg_ok = false; | |
692 | else | |
693 | di->chg_info.ac_chg_ok = true; | |
694 | ||
695 | } | |
696 | ||
697 | /** | |
698 | * abx500_chargalg_end_of_charge() - Check if end-of-charge criteria is fulfilled | |
699 | * @di: pointer to the abx500_chargalg structure | |
700 | * | |
701 | * End-of-charge criteria is fulfilled when the battery voltage is above a | |
702 | * certain limit and the battery current is below a certain limit for a | |
703 | * predefined number of consecutive seconds. If true, the battery is full | |
704 | */ | |
705 | static void abx500_chargalg_end_of_charge(struct abx500_chargalg *di) | |
706 | { | |
707 | if (di->charge_status == POWER_SUPPLY_STATUS_CHARGING && | |
708 | di->charge_state == STATE_NORMAL && | |
709 | !di->maintenance_chg && (di->batt_data.volt >= | |
710 | di->bat->bat_type[di->bat->batt_id].termination_vol || | |
711 | di->events.usb_cv_active || di->events.ac_cv_active) && | |
712 | di->batt_data.avg_curr < | |
713 | di->bat->bat_type[di->bat->batt_id].termination_curr && | |
714 | di->batt_data.avg_curr > 0) { | |
715 | if (++di->eoc_cnt >= EOC_COND_CNT) { | |
716 | di->eoc_cnt = 0; | |
717 | di->charge_status = POWER_SUPPLY_STATUS_FULL; | |
718 | di->maintenance_chg = true; | |
719 | dev_dbg(di->dev, "EOC reached!\n"); | |
720 | power_supply_changed(&di->chargalg_psy); | |
721 | } else { | |
722 | dev_dbg(di->dev, | |
723 | " EOC limit reached for the %d" | |
724 | " time, out of %d before EOC\n", | |
725 | di->eoc_cnt, | |
726 | EOC_COND_CNT); | |
727 | } | |
728 | } else { | |
729 | di->eoc_cnt = 0; | |
730 | } | |
731 | } | |
732 | ||
733 | static void init_maxim_chg_curr(struct abx500_chargalg *di) | |
734 | { | |
735 | di->ccm.original_iset = | |
736 | di->bat->bat_type[di->bat->batt_id].normal_cur_lvl; | |
737 | di->ccm.current_iset = | |
738 | di->bat->bat_type[di->bat->batt_id].normal_cur_lvl; | |
739 | di->ccm.test_delta_i = di->bat->maxi->charger_curr_step; | |
740 | di->ccm.max_current = di->bat->maxi->chg_curr; | |
741 | di->ccm.condition_cnt = di->bat->maxi->wait_cycles; | |
742 | di->ccm.level = 0; | |
743 | } | |
744 | ||
745 | /** | |
746 | * abx500_chargalg_chg_curr_maxim - increases the charger current to | |
747 | * compensate for the system load | |
748 | * @di pointer to the abx500_chargalg structure | |
749 | * | |
750 | * This maximization function is used to raise the charger current to get the | |
751 | * battery current as close to the optimal value as possible. The battery | |
752 | * current during charging is affected by the system load | |
753 | */ | |
754 | static enum maxim_ret abx500_chargalg_chg_curr_maxim(struct abx500_chargalg *di) | |
755 | { | |
756 | int delta_i; | |
757 | ||
758 | if (!di->bat->maxi->ena_maxi) | |
759 | return MAXIM_RET_NOACTION; | |
760 | ||
761 | delta_i = di->ccm.original_iset - di->batt_data.inst_curr; | |
762 | ||
763 | if (di->events.vbus_collapsed) { | |
764 | dev_dbg(di->dev, "Charger voltage has collapsed %d\n", | |
765 | di->ccm.wait_cnt); | |
766 | if (di->ccm.wait_cnt == 0) { | |
767 | dev_dbg(di->dev, "lowering current\n"); | |
768 | di->ccm.wait_cnt++; | |
769 | di->ccm.condition_cnt = di->bat->maxi->wait_cycles; | |
770 | di->ccm.max_current = | |
771 | di->ccm.current_iset - di->ccm.test_delta_i; | |
772 | di->ccm.current_iset = di->ccm.max_current; | |
773 | di->ccm.level--; | |
774 | return MAXIM_RET_CHANGE; | |
775 | } else { | |
776 | dev_dbg(di->dev, "waiting\n"); | |
777 | /* Let's go in here twice before lowering curr again */ | |
778 | di->ccm.wait_cnt = (di->ccm.wait_cnt + 1) % 3; | |
779 | return MAXIM_RET_NOACTION; | |
780 | } | |
781 | } | |
782 | ||
783 | di->ccm.wait_cnt = 0; | |
784 | ||
785 | if ((di->batt_data.inst_curr > di->ccm.original_iset)) { | |
786 | dev_dbg(di->dev, " Maximization Ibat (%dmA) too high" | |
787 | " (limit %dmA) (current iset: %dmA)!\n", | |
788 | di->batt_data.inst_curr, di->ccm.original_iset, | |
789 | di->ccm.current_iset); | |
790 | ||
791 | if (di->ccm.current_iset == di->ccm.original_iset) | |
792 | return MAXIM_RET_NOACTION; | |
793 | ||
794 | di->ccm.condition_cnt = di->bat->maxi->wait_cycles; | |
795 | di->ccm.current_iset = di->ccm.original_iset; | |
796 | di->ccm.level = 0; | |
797 | ||
798 | return MAXIM_RET_IBAT_TOO_HIGH; | |
799 | } | |
800 | ||
801 | if (delta_i > di->ccm.test_delta_i && | |
802 | (di->ccm.current_iset + di->ccm.test_delta_i) < | |
803 | di->ccm.max_current) { | |
804 | if (di->ccm.condition_cnt-- == 0) { | |
805 | /* Increse the iset with cco.test_delta_i */ | |
806 | di->ccm.condition_cnt = di->bat->maxi->wait_cycles; | |
807 | di->ccm.current_iset += di->ccm.test_delta_i; | |
808 | di->ccm.level++; | |
809 | dev_dbg(di->dev, " Maximization needed, increase" | |
810 | " with %d mA to %dmA (Optimal ibat: %d)" | |
811 | " Level %d\n", | |
812 | di->ccm.test_delta_i, | |
813 | di->ccm.current_iset, | |
814 | di->ccm.original_iset, | |
815 | di->ccm.level); | |
816 | return MAXIM_RET_CHANGE; | |
817 | } else { | |
818 | return MAXIM_RET_NOACTION; | |
819 | } | |
820 | } else { | |
821 | di->ccm.condition_cnt = di->bat->maxi->wait_cycles; | |
822 | return MAXIM_RET_NOACTION; | |
823 | } | |
824 | } | |
825 | ||
826 | static void handle_maxim_chg_curr(struct abx500_chargalg *di) | |
827 | { | |
828 | enum maxim_ret ret; | |
829 | int result; | |
830 | ||
831 | ret = abx500_chargalg_chg_curr_maxim(di); | |
832 | switch (ret) { | |
833 | case MAXIM_RET_CHANGE: | |
834 | result = abx500_chargalg_update_chg_curr(di, | |
835 | di->ccm.current_iset); | |
836 | if (result) | |
837 | dev_err(di->dev, "failed to set chg curr\n"); | |
838 | break; | |
839 | case MAXIM_RET_IBAT_TOO_HIGH: | |
840 | result = abx500_chargalg_update_chg_curr(di, | |
841 | di->bat->bat_type[di->bat->batt_id].normal_cur_lvl); | |
842 | if (result) | |
843 | dev_err(di->dev, "failed to set chg curr\n"); | |
844 | break; | |
845 | ||
846 | case MAXIM_RET_NOACTION: | |
847 | default: | |
848 | /* Do nothing..*/ | |
849 | break; | |
850 | } | |
851 | } | |
852 | ||
853 | static int abx500_chargalg_get_ext_psy_data(struct device *dev, void *data) | |
854 | { | |
855 | struct power_supply *psy; | |
856 | struct power_supply *ext; | |
857 | struct abx500_chargalg *di; | |
858 | union power_supply_propval ret; | |
859 | int i, j; | |
860 | bool psy_found = false; | |
861 | ||
862 | psy = (struct power_supply *)data; | |
863 | ext = dev_get_drvdata(dev); | |
864 | di = to_abx500_chargalg_device_info(psy); | |
865 | /* For all psy where the driver name appears in any supplied_to */ | |
866 | for (i = 0; i < ext->num_supplicants; i++) { | |
867 | if (!strcmp(ext->supplied_to[i], psy->name)) | |
868 | psy_found = true; | |
869 | } | |
870 | if (!psy_found) | |
871 | return 0; | |
872 | ||
873 | /* Go through all properties for the psy */ | |
874 | for (j = 0; j < ext->num_properties; j++) { | |
875 | enum power_supply_property prop; | |
876 | prop = ext->properties[j]; | |
877 | ||
878 | /* Initialize chargers if not already done */ | |
879 | if (!di->ac_chg && | |
880 | ext->type == POWER_SUPPLY_TYPE_MAINS) | |
881 | di->ac_chg = psy_to_ux500_charger(ext); | |
882 | else if (!di->usb_chg && | |
883 | ext->type == POWER_SUPPLY_TYPE_USB) | |
884 | di->usb_chg = psy_to_ux500_charger(ext); | |
885 | ||
886 | if (ext->get_property(ext, prop, &ret)) | |
887 | continue; | |
888 | switch (prop) { | |
889 | case POWER_SUPPLY_PROP_PRESENT: | |
890 | switch (ext->type) { | |
891 | case POWER_SUPPLY_TYPE_BATTERY: | |
892 | /* Battery present */ | |
893 | if (ret.intval) | |
894 | di->events.batt_rem = false; | |
895 | /* Battery removed */ | |
896 | else | |
897 | di->events.batt_rem = true; | |
898 | break; | |
899 | case POWER_SUPPLY_TYPE_MAINS: | |
900 | /* AC disconnected */ | |
901 | if (!ret.intval && | |
902 | (di->chg_info.conn_chg & AC_CHG)) { | |
903 | di->chg_info.prev_conn_chg = | |
904 | di->chg_info.conn_chg; | |
905 | di->chg_info.conn_chg &= ~AC_CHG; | |
906 | } | |
907 | /* AC connected */ | |
908 | else if (ret.intval && | |
909 | !(di->chg_info.conn_chg & AC_CHG)) { | |
910 | di->chg_info.prev_conn_chg = | |
911 | di->chg_info.conn_chg; | |
912 | di->chg_info.conn_chg |= AC_CHG; | |
913 | } | |
914 | break; | |
915 | case POWER_SUPPLY_TYPE_USB: | |
916 | /* USB disconnected */ | |
917 | if (!ret.intval && | |
918 | (di->chg_info.conn_chg & USB_CHG)) { | |
919 | di->chg_info.prev_conn_chg = | |
920 | di->chg_info.conn_chg; | |
921 | di->chg_info.conn_chg &= ~USB_CHG; | |
922 | } | |
923 | /* USB connected */ | |
924 | else if (ret.intval && | |
925 | !(di->chg_info.conn_chg & USB_CHG)) { | |
926 | di->chg_info.prev_conn_chg = | |
927 | di->chg_info.conn_chg; | |
928 | di->chg_info.conn_chg |= USB_CHG; | |
929 | } | |
930 | break; | |
931 | default: | |
932 | break; | |
933 | } | |
934 | break; | |
935 | ||
936 | case POWER_SUPPLY_PROP_ONLINE: | |
937 | switch (ext->type) { | |
938 | case POWER_SUPPLY_TYPE_BATTERY: | |
939 | break; | |
940 | case POWER_SUPPLY_TYPE_MAINS: | |
941 | /* AC offline */ | |
942 | if (!ret.intval && | |
943 | (di->chg_info.online_chg & AC_CHG)) { | |
944 | di->chg_info.prev_online_chg = | |
945 | di->chg_info.online_chg; | |
946 | di->chg_info.online_chg &= ~AC_CHG; | |
947 | } | |
948 | /* AC online */ | |
949 | else if (ret.intval && | |
950 | !(di->chg_info.online_chg & AC_CHG)) { | |
951 | di->chg_info.prev_online_chg = | |
952 | di->chg_info.online_chg; | |
953 | di->chg_info.online_chg |= AC_CHG; | |
954 | queue_delayed_work(di->chargalg_wq, | |
955 | &di->chargalg_wd_work, 0); | |
956 | } | |
957 | break; | |
958 | case POWER_SUPPLY_TYPE_USB: | |
959 | /* USB offline */ | |
960 | if (!ret.intval && | |
961 | (di->chg_info.online_chg & USB_CHG)) { | |
962 | di->chg_info.prev_online_chg = | |
963 | di->chg_info.online_chg; | |
964 | di->chg_info.online_chg &= ~USB_CHG; | |
965 | } | |
966 | /* USB online */ | |
967 | else if (ret.intval && | |
968 | !(di->chg_info.online_chg & USB_CHG)) { | |
969 | di->chg_info.prev_online_chg = | |
970 | di->chg_info.online_chg; | |
971 | di->chg_info.online_chg |= USB_CHG; | |
972 | queue_delayed_work(di->chargalg_wq, | |
973 | &di->chargalg_wd_work, 0); | |
974 | } | |
975 | break; | |
976 | default: | |
977 | break; | |
978 | } | |
979 | break; | |
980 | ||
981 | case POWER_SUPPLY_PROP_HEALTH: | |
982 | switch (ext->type) { | |
983 | case POWER_SUPPLY_TYPE_BATTERY: | |
984 | break; | |
985 | case POWER_SUPPLY_TYPE_MAINS: | |
986 | switch (ret.intval) { | |
987 | case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE: | |
988 | di->events.mainextchnotok = true; | |
989 | di->events.main_thermal_prot = false; | |
990 | di->events.main_ovv = false; | |
991 | di->events.ac_wd_expired = false; | |
992 | break; | |
993 | case POWER_SUPPLY_HEALTH_DEAD: | |
994 | di->events.ac_wd_expired = true; | |
995 | di->events.mainextchnotok = false; | |
996 | di->events.main_ovv = false; | |
997 | di->events.main_thermal_prot = false; | |
998 | break; | |
999 | case POWER_SUPPLY_HEALTH_COLD: | |
1000 | case POWER_SUPPLY_HEALTH_OVERHEAT: | |
1001 | di->events.main_thermal_prot = true; | |
1002 | di->events.mainextchnotok = false; | |
1003 | di->events.main_ovv = false; | |
1004 | di->events.ac_wd_expired = false; | |
1005 | break; | |
1006 | case POWER_SUPPLY_HEALTH_OVERVOLTAGE: | |
1007 | di->events.main_ovv = true; | |
1008 | di->events.mainextchnotok = false; | |
1009 | di->events.main_thermal_prot = false; | |
1010 | di->events.ac_wd_expired = false; | |
1011 | break; | |
1012 | case POWER_SUPPLY_HEALTH_GOOD: | |
1013 | di->events.main_thermal_prot = false; | |
1014 | di->events.mainextchnotok = false; | |
1015 | di->events.main_ovv = false; | |
1016 | di->events.ac_wd_expired = false; | |
1017 | break; | |
1018 | default: | |
1019 | break; | |
1020 | } | |
1021 | break; | |
1022 | ||
1023 | case POWER_SUPPLY_TYPE_USB: | |
1024 | switch (ret.intval) { | |
1025 | case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE: | |
1026 | di->events.usbchargernotok = true; | |
1027 | di->events.usb_thermal_prot = false; | |
1028 | di->events.vbus_ovv = false; | |
1029 | di->events.usb_wd_expired = false; | |
1030 | break; | |
1031 | case POWER_SUPPLY_HEALTH_DEAD: | |
1032 | di->events.usb_wd_expired = true; | |
1033 | di->events.usbchargernotok = false; | |
1034 | di->events.usb_thermal_prot = false; | |
1035 | di->events.vbus_ovv = false; | |
1036 | break; | |
1037 | case POWER_SUPPLY_HEALTH_COLD: | |
1038 | case POWER_SUPPLY_HEALTH_OVERHEAT: | |
1039 | di->events.usb_thermal_prot = true; | |
1040 | di->events.usbchargernotok = false; | |
1041 | di->events.vbus_ovv = false; | |
1042 | di->events.usb_wd_expired = false; | |
1043 | break; | |
1044 | case POWER_SUPPLY_HEALTH_OVERVOLTAGE: | |
1045 | di->events.vbus_ovv = true; | |
1046 | di->events.usbchargernotok = false; | |
1047 | di->events.usb_thermal_prot = false; | |
1048 | di->events.usb_wd_expired = false; | |
1049 | break; | |
1050 | case POWER_SUPPLY_HEALTH_GOOD: | |
1051 | di->events.usbchargernotok = false; | |
1052 | di->events.usb_thermal_prot = false; | |
1053 | di->events.vbus_ovv = false; | |
1054 | di->events.usb_wd_expired = false; | |
1055 | break; | |
1056 | default: | |
1057 | break; | |
1058 | } | |
1059 | default: | |
1060 | break; | |
1061 | } | |
1062 | break; | |
1063 | ||
1064 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
1065 | switch (ext->type) { | |
1066 | case POWER_SUPPLY_TYPE_BATTERY: | |
1067 | di->batt_data.volt = ret.intval / 1000; | |
1068 | break; | |
1069 | case POWER_SUPPLY_TYPE_MAINS: | |
1070 | di->chg_info.ac_volt = ret.intval / 1000; | |
1071 | break; | |
1072 | case POWER_SUPPLY_TYPE_USB: | |
1073 | di->chg_info.usb_volt = ret.intval / 1000; | |
1074 | break; | |
1075 | default: | |
1076 | break; | |
1077 | } | |
1078 | break; | |
1079 | ||
1080 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
1081 | switch (ext->type) { | |
1082 | case POWER_SUPPLY_TYPE_MAINS: | |
1083 | /* AVG is used to indicate when we are | |
1084 | * in CV mode */ | |
1085 | if (ret.intval) | |
1086 | di->events.ac_cv_active = true; | |
1087 | else | |
1088 | di->events.ac_cv_active = false; | |
1089 | ||
1090 | break; | |
1091 | case POWER_SUPPLY_TYPE_USB: | |
1092 | /* AVG is used to indicate when we are | |
1093 | * in CV mode */ | |
1094 | if (ret.intval) | |
1095 | di->events.usb_cv_active = true; | |
1096 | else | |
1097 | di->events.usb_cv_active = false; | |
1098 | ||
1099 | break; | |
1100 | default: | |
1101 | break; | |
1102 | } | |
1103 | break; | |
1104 | ||
1105 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
1106 | switch (ext->type) { | |
1107 | case POWER_SUPPLY_TYPE_BATTERY: | |
1108 | if (ret.intval) | |
1109 | di->events.batt_unknown = false; | |
1110 | else | |
1111 | di->events.batt_unknown = true; | |
1112 | ||
1113 | break; | |
1114 | default: | |
1115 | break; | |
1116 | } | |
1117 | break; | |
1118 | ||
1119 | case POWER_SUPPLY_PROP_TEMP: | |
1120 | di->batt_data.temp = ret.intval / 10; | |
1121 | break; | |
1122 | ||
1123 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
1124 | switch (ext->type) { | |
1125 | case POWER_SUPPLY_TYPE_MAINS: | |
1126 | di->chg_info.ac_curr = | |
1127 | ret.intval / 1000; | |
1128 | break; | |
1129 | case POWER_SUPPLY_TYPE_USB: | |
1130 | di->chg_info.usb_curr = | |
1131 | ret.intval / 1000; | |
1132 | break; | |
1133 | case POWER_SUPPLY_TYPE_BATTERY: | |
1134 | di->batt_data.inst_curr = ret.intval / 1000; | |
1135 | break; | |
1136 | default: | |
1137 | break; | |
1138 | } | |
1139 | break; | |
1140 | ||
1141 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
1142 | switch (ext->type) { | |
1143 | case POWER_SUPPLY_TYPE_BATTERY: | |
1144 | di->batt_data.avg_curr = ret.intval / 1000; | |
1145 | break; | |
1146 | case POWER_SUPPLY_TYPE_USB: | |
1147 | if (ret.intval) | |
1148 | di->events.vbus_collapsed = true; | |
1149 | else | |
1150 | di->events.vbus_collapsed = false; | |
1151 | break; | |
1152 | default: | |
1153 | break; | |
1154 | } | |
1155 | break; | |
1156 | case POWER_SUPPLY_PROP_CAPACITY: | |
1157 | di->batt_data.percent = ret.intval; | |
1158 | break; | |
1159 | default: | |
1160 | break; | |
1161 | } | |
1162 | } | |
1163 | return 0; | |
1164 | } | |
1165 | ||
1166 | /** | |
1167 | * abx500_chargalg_external_power_changed() - callback for power supply changes | |
1168 | * @psy: pointer to the structure power_supply | |
1169 | * | |
1170 | * This function is the entry point of the pointer external_power_changed | |
1171 | * of the structure power_supply. | |
1172 | * This function gets executed when there is a change in any external power | |
1173 | * supply that this driver needs to be notified of. | |
1174 | */ | |
1175 | static void abx500_chargalg_external_power_changed(struct power_supply *psy) | |
1176 | { | |
1177 | struct abx500_chargalg *di = to_abx500_chargalg_device_info(psy); | |
1178 | ||
1179 | /* | |
1180 | * Trigger execution of the algorithm instantly and read | |
1181 | * all power_supply properties there instead | |
1182 | */ | |
1183 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
1184 | } | |
1185 | ||
1186 | /** | |
1187 | * abx500_chargalg_algorithm() - Main function for the algorithm | |
1188 | * @di: pointer to the abx500_chargalg structure | |
1189 | * | |
1190 | * This is the main control function for the charging algorithm. | |
1191 | * It is called periodically or when something happens that will | |
1192 | * trigger a state change | |
1193 | */ | |
1194 | static void abx500_chargalg_algorithm(struct abx500_chargalg *di) | |
1195 | { | |
1196 | int charger_status; | |
1197 | ||
1198 | /* Collect data from all power_supply class devices */ | |
1199 | class_for_each_device(power_supply_class, NULL, | |
1200 | &di->chargalg_psy, abx500_chargalg_get_ext_psy_data); | |
1201 | ||
1202 | abx500_chargalg_end_of_charge(di); | |
1203 | abx500_chargalg_check_temp(di); | |
1204 | abx500_chargalg_check_charger_voltage(di); | |
1205 | ||
1206 | charger_status = abx500_chargalg_check_charger_connection(di); | |
1207 | /* | |
1208 | * First check if we have a charger connected. | |
1209 | * Also we don't allow charging of unknown batteries if configured | |
1210 | * this way | |
1211 | */ | |
1212 | if (!charger_status || | |
1213 | (di->events.batt_unknown && !di->bat->chg_unknown_bat)) { | |
1214 | if (di->charge_state != STATE_HANDHELD) { | |
1215 | di->events.safety_timer_expired = false; | |
1216 | abx500_chargalg_state_to(di, STATE_HANDHELD_INIT); | |
1217 | } | |
1218 | } | |
1219 | ||
1220 | /* If suspended, we should not continue checking the flags */ | |
1221 | else if (di->charge_state == STATE_SUSPENDED_INIT || | |
1222 | di->charge_state == STATE_SUSPENDED) { | |
1223 | /* We don't do anything here, just don,t continue */ | |
1224 | } | |
1225 | ||
1226 | /* Safety timer expiration */ | |
1227 | else if (di->events.safety_timer_expired) { | |
1228 | if (di->charge_state != STATE_SAFETY_TIMER_EXPIRED) | |
1229 | abx500_chargalg_state_to(di, | |
1230 | STATE_SAFETY_TIMER_EXPIRED_INIT); | |
1231 | } | |
1232 | /* | |
1233 | * Check if any interrupts has occured | |
1234 | * that will prevent us from charging | |
1235 | */ | |
1236 | ||
1237 | /* Battery removed */ | |
1238 | else if (di->events.batt_rem) { | |
1239 | if (di->charge_state != STATE_BATT_REMOVED) | |
1240 | abx500_chargalg_state_to(di, STATE_BATT_REMOVED_INIT); | |
1241 | } | |
1242 | /* Main or USB charger not ok. */ | |
1243 | else if (di->events.mainextchnotok || di->events.usbchargernotok) { | |
1244 | /* | |
1245 | * If vbus_collapsed is set, we have to lower the charger | |
1246 | * current, which is done in the normal state below | |
1247 | */ | |
1248 | if (di->charge_state != STATE_CHG_NOT_OK && | |
1249 | !di->events.vbus_collapsed) | |
1250 | abx500_chargalg_state_to(di, STATE_CHG_NOT_OK_INIT); | |
1251 | } | |
1252 | /* VBUS, Main or VBAT OVV. */ | |
1253 | else if (di->events.vbus_ovv || | |
1254 | di->events.main_ovv || | |
1255 | di->events.batt_ovv || | |
1256 | !di->chg_info.usb_chg_ok || | |
1257 | !di->chg_info.ac_chg_ok) { | |
1258 | if (di->charge_state != STATE_OVV_PROTECT) | |
1259 | abx500_chargalg_state_to(di, STATE_OVV_PROTECT_INIT); | |
1260 | } | |
1261 | /* USB Thermal, stop charging */ | |
1262 | else if (di->events.main_thermal_prot || | |
1263 | di->events.usb_thermal_prot) { | |
1264 | if (di->charge_state != STATE_HW_TEMP_PROTECT) | |
1265 | abx500_chargalg_state_to(di, | |
1266 | STATE_HW_TEMP_PROTECT_INIT); | |
1267 | } | |
1268 | /* Battery temp over/under */ | |
1269 | else if (di->events.btemp_underover) { | |
1270 | if (di->charge_state != STATE_TEMP_UNDEROVER) | |
1271 | abx500_chargalg_state_to(di, | |
1272 | STATE_TEMP_UNDEROVER_INIT); | |
1273 | } | |
1274 | /* Watchdog expired */ | |
1275 | else if (di->events.ac_wd_expired || | |
1276 | di->events.usb_wd_expired) { | |
1277 | if (di->charge_state != STATE_WD_EXPIRED) | |
1278 | abx500_chargalg_state_to(di, STATE_WD_EXPIRED_INIT); | |
1279 | } | |
1280 | /* Battery temp high/low */ | |
1281 | else if (di->events.btemp_lowhigh) { | |
1282 | if (di->charge_state != STATE_TEMP_LOWHIGH) | |
1283 | abx500_chargalg_state_to(di, STATE_TEMP_LOWHIGH_INIT); | |
1284 | } | |
1285 | ||
1286 | dev_dbg(di->dev, | |
1287 | "[CHARGALG] Vb %d Ib_avg %d Ib_inst %d Tb %d Cap %d Maint %d " | |
1288 | "State %s Active_chg %d Chg_status %d AC %d USB %d " | |
1289 | "AC_online %d USB_online %d AC_CV %d USB_CV %d AC_I %d " | |
1290 | "USB_I %d AC_Vset %d AC_Iset %d USB_Vset %d USB_Iset %d\n", | |
1291 | di->batt_data.volt, | |
1292 | di->batt_data.avg_curr, | |
1293 | di->batt_data.inst_curr, | |
1294 | di->batt_data.temp, | |
1295 | di->batt_data.percent, | |
1296 | di->maintenance_chg, | |
1297 | states[di->charge_state], | |
1298 | di->chg_info.charger_type, | |
1299 | di->charge_status, | |
1300 | di->chg_info.conn_chg & AC_CHG, | |
1301 | di->chg_info.conn_chg & USB_CHG, | |
1302 | di->chg_info.online_chg & AC_CHG, | |
1303 | di->chg_info.online_chg & USB_CHG, | |
1304 | di->events.ac_cv_active, | |
1305 | di->events.usb_cv_active, | |
1306 | di->chg_info.ac_curr, | |
1307 | di->chg_info.usb_curr, | |
1308 | di->chg_info.ac_vset, | |
1309 | di->chg_info.ac_iset, | |
1310 | di->chg_info.usb_vset, | |
1311 | di->chg_info.usb_iset); | |
1312 | ||
1313 | switch (di->charge_state) { | |
1314 | case STATE_HANDHELD_INIT: | |
1315 | abx500_chargalg_stop_charging(di); | |
1316 | di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING; | |
1317 | abx500_chargalg_state_to(di, STATE_HANDHELD); | |
1318 | /* Intentional fallthrough */ | |
1319 | ||
1320 | case STATE_HANDHELD: | |
1321 | break; | |
1322 | ||
1323 | case STATE_SUSPENDED_INIT: | |
1324 | if (di->susp_status.ac_suspended) | |
1325 | abx500_chargalg_ac_en(di, false, 0, 0); | |
1326 | if (di->susp_status.usb_suspended) | |
1327 | abx500_chargalg_usb_en(di, false, 0, 0); | |
1328 | abx500_chargalg_stop_safety_timer(di); | |
1329 | abx500_chargalg_stop_maintenance_timer(di); | |
1330 | di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
1331 | di->maintenance_chg = false; | |
1332 | abx500_chargalg_state_to(di, STATE_SUSPENDED); | |
1333 | power_supply_changed(&di->chargalg_psy); | |
1334 | /* Intentional fallthrough */ | |
1335 | ||
1336 | case STATE_SUSPENDED: | |
1337 | /* CHARGING is suspended */ | |
1338 | break; | |
1339 | ||
1340 | case STATE_BATT_REMOVED_INIT: | |
1341 | abx500_chargalg_stop_charging(di); | |
1342 | abx500_chargalg_state_to(di, STATE_BATT_REMOVED); | |
1343 | /* Intentional fallthrough */ | |
1344 | ||
1345 | case STATE_BATT_REMOVED: | |
1346 | if (!di->events.batt_rem) | |
1347 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1348 | break; | |
1349 | ||
1350 | case STATE_HW_TEMP_PROTECT_INIT: | |
1351 | abx500_chargalg_stop_charging(di); | |
1352 | abx500_chargalg_state_to(di, STATE_HW_TEMP_PROTECT); | |
1353 | /* Intentional fallthrough */ | |
1354 | ||
1355 | case STATE_HW_TEMP_PROTECT: | |
1356 | if (!di->events.main_thermal_prot && | |
1357 | !di->events.usb_thermal_prot) | |
1358 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1359 | break; | |
1360 | ||
1361 | case STATE_OVV_PROTECT_INIT: | |
1362 | abx500_chargalg_stop_charging(di); | |
1363 | abx500_chargalg_state_to(di, STATE_OVV_PROTECT); | |
1364 | /* Intentional fallthrough */ | |
1365 | ||
1366 | case STATE_OVV_PROTECT: | |
1367 | if (!di->events.vbus_ovv && | |
1368 | !di->events.main_ovv && | |
1369 | !di->events.batt_ovv && | |
1370 | di->chg_info.usb_chg_ok && | |
1371 | di->chg_info.ac_chg_ok) | |
1372 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1373 | break; | |
1374 | ||
1375 | case STATE_CHG_NOT_OK_INIT: | |
1376 | abx500_chargalg_stop_charging(di); | |
1377 | abx500_chargalg_state_to(di, STATE_CHG_NOT_OK); | |
1378 | /* Intentional fallthrough */ | |
1379 | ||
1380 | case STATE_CHG_NOT_OK: | |
1381 | if (!di->events.mainextchnotok && | |
1382 | !di->events.usbchargernotok) | |
1383 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1384 | break; | |
1385 | ||
1386 | case STATE_SAFETY_TIMER_EXPIRED_INIT: | |
1387 | abx500_chargalg_stop_charging(di); | |
1388 | abx500_chargalg_state_to(di, STATE_SAFETY_TIMER_EXPIRED); | |
1389 | /* Intentional fallthrough */ | |
1390 | ||
1391 | case STATE_SAFETY_TIMER_EXPIRED: | |
1392 | /* We exit this state when charger is removed */ | |
1393 | break; | |
1394 | ||
1395 | case STATE_NORMAL_INIT: | |
1396 | abx500_chargalg_start_charging(di, | |
1397 | di->bat->bat_type[di->bat->batt_id].normal_vol_lvl, | |
1398 | di->bat->bat_type[di->bat->batt_id].normal_cur_lvl); | |
1399 | abx500_chargalg_state_to(di, STATE_NORMAL); | |
1400 | abx500_chargalg_start_safety_timer(di); | |
1401 | abx500_chargalg_stop_maintenance_timer(di); | |
1402 | init_maxim_chg_curr(di); | |
1403 | di->charge_status = POWER_SUPPLY_STATUS_CHARGING; | |
1404 | di->eoc_cnt = 0; | |
1405 | di->maintenance_chg = false; | |
1406 | power_supply_changed(&di->chargalg_psy); | |
1407 | ||
1408 | break; | |
1409 | ||
1410 | case STATE_NORMAL: | |
1411 | handle_maxim_chg_curr(di); | |
1412 | if (di->charge_status == POWER_SUPPLY_STATUS_FULL && | |
1413 | di->maintenance_chg) { | |
1414 | if (di->bat->no_maintenance) | |
1415 | abx500_chargalg_state_to(di, | |
1416 | STATE_WAIT_FOR_RECHARGE_INIT); | |
1417 | else | |
1418 | abx500_chargalg_state_to(di, | |
1419 | STATE_MAINTENANCE_A_INIT); | |
1420 | } | |
1421 | break; | |
1422 | ||
1423 | /* This state will be used when the maintenance state is disabled */ | |
1424 | case STATE_WAIT_FOR_RECHARGE_INIT: | |
1425 | abx500_chargalg_hold_charging(di); | |
1426 | abx500_chargalg_state_to(di, STATE_WAIT_FOR_RECHARGE); | |
1427 | di->rch_cnt = RCH_COND_CNT; | |
1428 | /* Intentional fallthrough */ | |
1429 | ||
1430 | case STATE_WAIT_FOR_RECHARGE: | |
1431 | if (di->batt_data.volt <= | |
1432 | di->bat->bat_type[di->bat->batt_id].recharge_vol) { | |
1433 | if (di->rch_cnt-- == 0) | |
1434 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1435 | } else | |
1436 | di->rch_cnt = RCH_COND_CNT; | |
1437 | break; | |
1438 | ||
1439 | case STATE_MAINTENANCE_A_INIT: | |
1440 | abx500_chargalg_stop_safety_timer(di); | |
1441 | abx500_chargalg_start_maintenance_timer(di, | |
1442 | di->bat->bat_type[ | |
1443 | di->bat->batt_id].maint_a_chg_timer_h); | |
1444 | abx500_chargalg_start_charging(di, | |
1445 | di->bat->bat_type[ | |
1446 | di->bat->batt_id].maint_a_vol_lvl, | |
1447 | di->bat->bat_type[ | |
1448 | di->bat->batt_id].maint_a_cur_lvl); | |
1449 | abx500_chargalg_state_to(di, STATE_MAINTENANCE_A); | |
1450 | power_supply_changed(&di->chargalg_psy); | |
1451 | /* Intentional fallthrough*/ | |
1452 | ||
1453 | case STATE_MAINTENANCE_A: | |
1454 | if (di->events.maintenance_timer_expired) { | |
1455 | abx500_chargalg_stop_maintenance_timer(di); | |
1456 | abx500_chargalg_state_to(di, STATE_MAINTENANCE_B_INIT); | |
1457 | } | |
1458 | break; | |
1459 | ||
1460 | case STATE_MAINTENANCE_B_INIT: | |
1461 | abx500_chargalg_start_maintenance_timer(di, | |
1462 | di->bat->bat_type[ | |
1463 | di->bat->batt_id].maint_b_chg_timer_h); | |
1464 | abx500_chargalg_start_charging(di, | |
1465 | di->bat->bat_type[ | |
1466 | di->bat->batt_id].maint_b_vol_lvl, | |
1467 | di->bat->bat_type[ | |
1468 | di->bat->batt_id].maint_b_cur_lvl); | |
1469 | abx500_chargalg_state_to(di, STATE_MAINTENANCE_B); | |
1470 | power_supply_changed(&di->chargalg_psy); | |
1471 | /* Intentional fallthrough*/ | |
1472 | ||
1473 | case STATE_MAINTENANCE_B: | |
1474 | if (di->events.maintenance_timer_expired) { | |
1475 | abx500_chargalg_stop_maintenance_timer(di); | |
1476 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1477 | } | |
1478 | break; | |
1479 | ||
1480 | case STATE_TEMP_LOWHIGH_INIT: | |
1481 | abx500_chargalg_start_charging(di, | |
1482 | di->bat->bat_type[ | |
1483 | di->bat->batt_id].low_high_vol_lvl, | |
1484 | di->bat->bat_type[ | |
1485 | di->bat->batt_id].low_high_cur_lvl); | |
1486 | abx500_chargalg_stop_maintenance_timer(di); | |
1487 | di->charge_status = POWER_SUPPLY_STATUS_CHARGING; | |
1488 | abx500_chargalg_state_to(di, STATE_TEMP_LOWHIGH); | |
1489 | power_supply_changed(&di->chargalg_psy); | |
1490 | /* Intentional fallthrough */ | |
1491 | ||
1492 | case STATE_TEMP_LOWHIGH: | |
1493 | if (!di->events.btemp_lowhigh) | |
1494 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1495 | break; | |
1496 | ||
1497 | case STATE_WD_EXPIRED_INIT: | |
1498 | abx500_chargalg_stop_charging(di); | |
1499 | abx500_chargalg_state_to(di, STATE_WD_EXPIRED); | |
1500 | /* Intentional fallthrough */ | |
1501 | ||
1502 | case STATE_WD_EXPIRED: | |
1503 | if (!di->events.ac_wd_expired && | |
1504 | !di->events.usb_wd_expired) | |
1505 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1506 | break; | |
1507 | ||
1508 | case STATE_TEMP_UNDEROVER_INIT: | |
1509 | abx500_chargalg_stop_charging(di); | |
1510 | abx500_chargalg_state_to(di, STATE_TEMP_UNDEROVER); | |
1511 | /* Intentional fallthrough */ | |
1512 | ||
1513 | case STATE_TEMP_UNDEROVER: | |
1514 | if (!di->events.btemp_underover) | |
1515 | abx500_chargalg_state_to(di, STATE_NORMAL_INIT); | |
1516 | break; | |
1517 | } | |
1518 | ||
1519 | /* Start charging directly if the new state is a charge state */ | |
1520 | if (di->charge_state == STATE_NORMAL_INIT || | |
1521 | di->charge_state == STATE_MAINTENANCE_A_INIT || | |
1522 | di->charge_state == STATE_MAINTENANCE_B_INIT) | |
1523 | queue_work(di->chargalg_wq, &di->chargalg_work); | |
1524 | } | |
1525 | ||
1526 | /** | |
1527 | * abx500_chargalg_periodic_work() - Periodic work for the algorithm | |
1528 | * @work: pointer to the work_struct structure | |
1529 | * | |
1530 | * Work queue function for the charging algorithm | |
1531 | */ | |
1532 | static void abx500_chargalg_periodic_work(struct work_struct *work) | |
1533 | { | |
1534 | struct abx500_chargalg *di = container_of(work, | |
1535 | struct abx500_chargalg, chargalg_periodic_work.work); | |
1536 | ||
1537 | abx500_chargalg_algorithm(di); | |
1538 | ||
1539 | /* | |
1540 | * If a charger is connected then the battery has to be monitored | |
1541 | * frequently, else the work can be delayed. | |
1542 | */ | |
1543 | if (di->chg_info.conn_chg) | |
1544 | queue_delayed_work(di->chargalg_wq, | |
1545 | &di->chargalg_periodic_work, | |
1546 | di->bat->interval_charging * HZ); | |
1547 | else | |
1548 | queue_delayed_work(di->chargalg_wq, | |
1549 | &di->chargalg_periodic_work, | |
1550 | di->bat->interval_not_charging * HZ); | |
1551 | } | |
1552 | ||
1553 | /** | |
1554 | * abx500_chargalg_wd_work() - periodic work to kick the charger watchdog | |
1555 | * @work: pointer to the work_struct structure | |
1556 | * | |
1557 | * Work queue function for kicking the charger watchdog | |
1558 | */ | |
1559 | static void abx500_chargalg_wd_work(struct work_struct *work) | |
1560 | { | |
1561 | int ret; | |
1562 | struct abx500_chargalg *di = container_of(work, | |
1563 | struct abx500_chargalg, chargalg_wd_work.work); | |
1564 | ||
1565 | dev_dbg(di->dev, "abx500_chargalg_wd_work\n"); | |
1566 | ||
1567 | ret = abx500_chargalg_kick_watchdog(di); | |
1568 | if (ret < 0) | |
1569 | dev_err(di->dev, "failed to kick watchdog\n"); | |
1570 | ||
1571 | queue_delayed_work(di->chargalg_wq, | |
1572 | &di->chargalg_wd_work, CHG_WD_INTERVAL); | |
1573 | } | |
1574 | ||
1575 | /** | |
1576 | * abx500_chargalg_work() - Work to run the charging algorithm instantly | |
1577 | * @work: pointer to the work_struct structure | |
1578 | * | |
1579 | * Work queue function for calling the charging algorithm | |
1580 | */ | |
1581 | static void abx500_chargalg_work(struct work_struct *work) | |
1582 | { | |
1583 | struct abx500_chargalg *di = container_of(work, | |
1584 | struct abx500_chargalg, chargalg_work); | |
1585 | ||
1586 | abx500_chargalg_algorithm(di); | |
1587 | } | |
1588 | ||
1589 | /** | |
1590 | * abx500_chargalg_get_property() - get the chargalg properties | |
1591 | * @psy: pointer to the power_supply structure | |
1592 | * @psp: pointer to the power_supply_property structure | |
1593 | * @val: pointer to the power_supply_propval union | |
1594 | * | |
1595 | * This function gets called when an application tries to get the | |
1596 | * chargalg properties by reading the sysfs files. | |
1597 | * status: charging/discharging/full/unknown | |
1598 | * health: health of the battery | |
1599 | * Returns error code in case of failure else 0 on success | |
1600 | */ | |
1601 | static int abx500_chargalg_get_property(struct power_supply *psy, | |
1602 | enum power_supply_property psp, | |
1603 | union power_supply_propval *val) | |
1604 | { | |
1605 | struct abx500_chargalg *di; | |
1606 | ||
1607 | di = to_abx500_chargalg_device_info(psy); | |
1608 | ||
1609 | switch (psp) { | |
1610 | case POWER_SUPPLY_PROP_STATUS: | |
1611 | val->intval = di->charge_status; | |
1612 | break; | |
1613 | case POWER_SUPPLY_PROP_HEALTH: | |
1614 | if (di->events.batt_ovv) { | |
1615 | val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; | |
1616 | } else if (di->events.btemp_underover) { | |
1617 | if (di->batt_data.temp <= di->bat->temp_under) | |
1618 | val->intval = POWER_SUPPLY_HEALTH_COLD; | |
1619 | else | |
1620 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
1621 | } else { | |
1622 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
1623 | } | |
1624 | break; | |
1625 | default: | |
1626 | return -EINVAL; | |
1627 | } | |
1628 | return 0; | |
1629 | } | |
1630 | ||
1631 | /* Exposure to the sysfs interface */ | |
1632 | ||
1633 | /** | |
1634 | * abx500_chargalg_sysfs_charger() - sysfs store operations | |
1635 | * @kobj: pointer to the struct kobject | |
1636 | * @attr: pointer to the struct attribute | |
1637 | * @buf: buffer that holds the parameter passed from userspace | |
1638 | * @length: length of the parameter passed | |
1639 | * | |
1640 | * Returns length of the buffer(input taken from user space) on success | |
1641 | * else error code on failure | |
1642 | * The operation to be performed on passing the parameters from the user space. | |
1643 | */ | |
1644 | static ssize_t abx500_chargalg_sysfs_charger(struct kobject *kobj, | |
1645 | struct attribute *attr, const char *buf, size_t length) | |
1646 | { | |
1647 | struct abx500_chargalg *di = container_of(kobj, | |
1648 | struct abx500_chargalg, chargalg_kobject); | |
1649 | long int param; | |
1650 | int ac_usb; | |
1651 | int ret; | |
1652 | char entry = *attr->name; | |
1653 | ||
1654 | switch (entry) { | |
1655 | case 'c': | |
1656 | ret = strict_strtol(buf, 10, ¶m); | |
1657 | if (ret < 0) | |
1658 | return ret; | |
1659 | ||
1660 | ac_usb = param; | |
1661 | switch (ac_usb) { | |
1662 | case 0: | |
1663 | /* Disable charging */ | |
1664 | di->susp_status.ac_suspended = true; | |
1665 | di->susp_status.usb_suspended = true; | |
1666 | di->susp_status.suspended_change = true; | |
1667 | /* Trigger a state change */ | |
1668 | queue_work(di->chargalg_wq, | |
1669 | &di->chargalg_work); | |
1670 | break; | |
1671 | case 1: | |
1672 | /* Enable AC Charging */ | |
1673 | di->susp_status.ac_suspended = false; | |
1674 | di->susp_status.suspended_change = true; | |
1675 | /* Trigger a state change */ | |
1676 | queue_work(di->chargalg_wq, | |
1677 | &di->chargalg_work); | |
1678 | break; | |
1679 | case 2: | |
1680 | /* Enable USB charging */ | |
1681 | di->susp_status.usb_suspended = false; | |
1682 | di->susp_status.suspended_change = true; | |
1683 | /* Trigger a state change */ | |
1684 | queue_work(di->chargalg_wq, | |
1685 | &di->chargalg_work); | |
1686 | break; | |
1687 | default: | |
1688 | dev_info(di->dev, "Wrong input\n" | |
1689 | "Enter 0. Disable AC/USB Charging\n" | |
1690 | "1. Enable AC charging\n" | |
1691 | "2. Enable USB Charging\n"); | |
1692 | }; | |
1693 | break; | |
1694 | }; | |
1695 | return strlen(buf); | |
1696 | } | |
1697 | ||
1698 | static struct attribute abx500_chargalg_en_charger = \ | |
1699 | { | |
1700 | .name = "chargalg", | |
1701 | .mode = S_IWUGO, | |
1702 | }; | |
1703 | ||
1704 | static struct attribute *abx500_chargalg_chg[] = { | |
1705 | &abx500_chargalg_en_charger, | |
1706 | NULL | |
1707 | }; | |
1708 | ||
64eb9b02 | 1709 | static const struct sysfs_ops abx500_chargalg_sysfs_ops = { |
1668f811 AM |
1710 | .store = abx500_chargalg_sysfs_charger, |
1711 | }; | |
1712 | ||
1713 | static struct kobj_type abx500_chargalg_ktype = { | |
1714 | .sysfs_ops = &abx500_chargalg_sysfs_ops, | |
1715 | .default_attrs = abx500_chargalg_chg, | |
1716 | }; | |
1717 | ||
1718 | /** | |
1719 | * abx500_chargalg_sysfs_exit() - de-init of sysfs entry | |
1720 | * @di: pointer to the struct abx500_chargalg | |
1721 | * | |
1722 | * This function removes the entry in sysfs. | |
1723 | */ | |
1724 | static void abx500_chargalg_sysfs_exit(struct abx500_chargalg *di) | |
1725 | { | |
1726 | kobject_del(&di->chargalg_kobject); | |
1727 | } | |
1728 | ||
1729 | /** | |
1730 | * abx500_chargalg_sysfs_init() - init of sysfs entry | |
1731 | * @di: pointer to the struct abx500_chargalg | |
1732 | * | |
1733 | * This function adds an entry in sysfs. | |
1734 | * Returns error code in case of failure else 0(on success) | |
1735 | */ | |
1736 | static int abx500_chargalg_sysfs_init(struct abx500_chargalg *di) | |
1737 | { | |
1738 | int ret = 0; | |
1739 | ||
1740 | ret = kobject_init_and_add(&di->chargalg_kobject, | |
1741 | &abx500_chargalg_ktype, | |
1742 | NULL, "abx500_chargalg"); | |
1743 | if (ret < 0) | |
1744 | dev_err(di->dev, "failed to create sysfs entry\n"); | |
1745 | ||
1746 | return ret; | |
1747 | } | |
1748 | /* Exposure to the sysfs interface <<END>> */ | |
1749 | ||
1750 | #if defined(CONFIG_PM) | |
1751 | static int abx500_chargalg_resume(struct platform_device *pdev) | |
1752 | { | |
1753 | struct abx500_chargalg *di = platform_get_drvdata(pdev); | |
1754 | ||
1755 | /* Kick charger watchdog if charging (any charger online) */ | |
1756 | if (di->chg_info.online_chg) | |
1757 | queue_delayed_work(di->chargalg_wq, &di->chargalg_wd_work, 0); | |
1758 | ||
1759 | /* | |
1760 | * Run the charging algorithm directly to be sure we don't | |
1761 | * do it too seldom | |
1762 | */ | |
1763 | queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0); | |
1764 | ||
1765 | return 0; | |
1766 | } | |
1767 | ||
1768 | static int abx500_chargalg_suspend(struct platform_device *pdev, | |
1769 | pm_message_t state) | |
1770 | { | |
1771 | struct abx500_chargalg *di = platform_get_drvdata(pdev); | |
1772 | ||
1773 | if (di->chg_info.online_chg) | |
1774 | cancel_delayed_work_sync(&di->chargalg_wd_work); | |
1775 | ||
1776 | cancel_delayed_work_sync(&di->chargalg_periodic_work); | |
1777 | ||
1778 | return 0; | |
1779 | } | |
1780 | #else | |
1781 | #define abx500_chargalg_suspend NULL | |
1782 | #define abx500_chargalg_resume NULL | |
1783 | #endif | |
1784 | ||
1785 | static int __devexit abx500_chargalg_remove(struct platform_device *pdev) | |
1786 | { | |
1787 | struct abx500_chargalg *di = platform_get_drvdata(pdev); | |
1788 | ||
1789 | /* sysfs interface to enable/disbale charging from user space */ | |
1790 | abx500_chargalg_sysfs_exit(di); | |
1791 | ||
1792 | /* Delete the work queue */ | |
1793 | destroy_workqueue(di->chargalg_wq); | |
1794 | ||
1795 | flush_scheduled_work(); | |
1796 | power_supply_unregister(&di->chargalg_psy); | |
1797 | platform_set_drvdata(pdev, NULL); | |
1798 | kfree(di); | |
1799 | ||
1800 | return 0; | |
1801 | } | |
1802 | ||
1803 | static int __devinit abx500_chargalg_probe(struct platform_device *pdev) | |
1804 | { | |
1805 | struct abx500_bm_plat_data *plat_data; | |
1806 | int ret = 0; | |
1807 | ||
1808 | struct abx500_chargalg *di = | |
1809 | kzalloc(sizeof(struct abx500_chargalg), GFP_KERNEL); | |
1810 | if (!di) | |
1811 | return -ENOMEM; | |
1812 | ||
1813 | /* get device struct */ | |
1814 | di->dev = &pdev->dev; | |
1815 | ||
1816 | plat_data = pdev->dev.platform_data; | |
1817 | di->pdata = plat_data->chargalg; | |
1818 | di->bat = plat_data->battery; | |
1819 | ||
1820 | /* chargalg supply */ | |
1821 | di->chargalg_psy.name = "abx500_chargalg"; | |
1822 | di->chargalg_psy.type = POWER_SUPPLY_TYPE_BATTERY; | |
1823 | di->chargalg_psy.properties = abx500_chargalg_props; | |
1824 | di->chargalg_psy.num_properties = ARRAY_SIZE(abx500_chargalg_props); | |
1825 | di->chargalg_psy.get_property = abx500_chargalg_get_property; | |
1826 | di->chargalg_psy.supplied_to = di->pdata->supplied_to; | |
1827 | di->chargalg_psy.num_supplicants = di->pdata->num_supplicants; | |
1828 | di->chargalg_psy.external_power_changed = | |
1829 | abx500_chargalg_external_power_changed; | |
1830 | ||
1831 | /* Initilialize safety timer */ | |
1832 | init_timer(&di->safety_timer); | |
1833 | di->safety_timer.function = abx500_chargalg_safety_timer_expired; | |
1834 | di->safety_timer.data = (unsigned long) di; | |
1835 | ||
1836 | /* Initilialize maintenance timer */ | |
1837 | init_timer(&di->maintenance_timer); | |
1838 | di->maintenance_timer.function = | |
1839 | abx500_chargalg_maintenance_timer_expired; | |
1840 | di->maintenance_timer.data = (unsigned long) di; | |
1841 | ||
1842 | /* Create a work queue for the chargalg */ | |
1843 | di->chargalg_wq = | |
1844 | create_singlethread_workqueue("abx500_chargalg_wq"); | |
1845 | if (di->chargalg_wq == NULL) { | |
1846 | dev_err(di->dev, "failed to create work queue\n"); | |
1847 | goto free_device_info; | |
1848 | } | |
1849 | ||
1850 | /* Init work for chargalg */ | |
1851 | INIT_DELAYED_WORK_DEFERRABLE(&di->chargalg_periodic_work, | |
1852 | abx500_chargalg_periodic_work); | |
1853 | INIT_DELAYED_WORK_DEFERRABLE(&di->chargalg_wd_work, | |
1854 | abx500_chargalg_wd_work); | |
1855 | ||
1856 | /* Init work for chargalg */ | |
1857 | INIT_WORK(&di->chargalg_work, abx500_chargalg_work); | |
1858 | ||
1859 | /* To detect charger at startup */ | |
1860 | di->chg_info.prev_conn_chg = -1; | |
1861 | ||
1862 | /* Register chargalg power supply class */ | |
1863 | ret = power_supply_register(di->dev, &di->chargalg_psy); | |
1864 | if (ret) { | |
1865 | dev_err(di->dev, "failed to register chargalg psy\n"); | |
1866 | goto free_chargalg_wq; | |
1867 | } | |
1868 | ||
1869 | platform_set_drvdata(pdev, di); | |
1870 | ||
1871 | /* sysfs interface to enable/disable charging from user space */ | |
1872 | ret = abx500_chargalg_sysfs_init(di); | |
1873 | if (ret) { | |
1874 | dev_err(di->dev, "failed to create sysfs entry\n"); | |
1875 | goto free_psy; | |
1876 | } | |
1877 | ||
1878 | /* Run the charging algorithm */ | |
1879 | queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0); | |
1880 | ||
1881 | dev_info(di->dev, "probe success\n"); | |
1882 | return ret; | |
1883 | ||
1884 | free_psy: | |
1885 | power_supply_unregister(&di->chargalg_psy); | |
1886 | free_chargalg_wq: | |
1887 | destroy_workqueue(di->chargalg_wq); | |
1888 | free_device_info: | |
1889 | kfree(di); | |
1890 | ||
1891 | return ret; | |
1892 | } | |
1893 | ||
1894 | static struct platform_driver abx500_chargalg_driver = { | |
1895 | .probe = abx500_chargalg_probe, | |
1896 | .remove = __devexit_p(abx500_chargalg_remove), | |
1897 | .suspend = abx500_chargalg_suspend, | |
1898 | .resume = abx500_chargalg_resume, | |
1899 | .driver = { | |
1900 | .name = "abx500-chargalg", | |
1901 | .owner = THIS_MODULE, | |
1902 | }, | |
1903 | }; | |
1904 | ||
1905 | static int __init abx500_chargalg_init(void) | |
1906 | { | |
1907 | return platform_driver_register(&abx500_chargalg_driver); | |
1908 | } | |
1909 | ||
1910 | static void __exit abx500_chargalg_exit(void) | |
1911 | { | |
1912 | platform_driver_unregister(&abx500_chargalg_driver); | |
1913 | } | |
1914 | ||
1915 | module_init(abx500_chargalg_init); | |
1916 | module_exit(abx500_chargalg_exit); | |
1917 | ||
1918 | MODULE_LICENSE("GPL v2"); | |
1919 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski"); | |
1920 | MODULE_ALIAS("platform:abx500-chargalg"); | |
1921 | MODULE_DESCRIPTION("abx500 battery charging algorithm"); |