1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright (C) ST-Ericsson AB 2012 |
4 | * |
5 | * Main and Back-up battery management driver. |
6 | * |
7 | * Note: Backup battery management is required in case of Li-Ion battery and not |
8 | * for capacitive battery. HREF boards have capacitive battery and hence backup |
9 | * battery management is not used and the supported code is available in this |
10 | * driver. |
11 | * |
12 | * Author: |
13 | * Johan Palsson <johan.palsson@stericsson.com> |
14 | * Karl Komierowski <karl.komierowski@stericsson.com> |
15 | * Arun R Murthy <arun.murthy@stericsson.com> |
16 | */ |
17 | |
18 | #include <linux/init.h> |
19 | #include <linux/module.h> |
20 | #include <linux/component.h> |
21 | #include <linux/device.h> |
22 | #include <linux/interrupt.h> |
23 | #include <linux/platform_device.h> |
24 | #include <linux/power_supply.h> |
25 | #include <linux/kobject.h> |
26 | #include <linux/slab.h> |
27 | #include <linux/delay.h> |
28 | #include <linux/time.h> |
29 | #include <linux/time64.h> |
30 | #include <linux/of.h> |
31 | #include <linux/completion.h> |
32 | #include <linux/mfd/core.h> |
33 | #include <linux/mfd/abx500.h> |
34 | #include <linux/mfd/abx500/ab8500.h> |
35 | #include <linux/iio/consumer.h> |
36 | #include <linux/kernel.h> |
37 | #include <linux/fixp-arith.h> |
38 | |
39 | #include "ab8500-bm.h" |
40 | |
41 | #define FG_LSB_IN_MA 1627 |
42 | #define QLSB_NANO_AMP_HOURS_X10 1071 |
43 | #define INS_CURR_TIMEOUT (3 * HZ) |
44 | |
45 | #define SEC_TO_SAMPLE(S) (S * 4) |
46 | |
47 | #define NBR_AVG_SAMPLES 20 |
48 | #define WAIT_FOR_INST_CURRENT_MAX 70 |
49 | /* Currents higher than -500mA (dissipating) will make compensation unstable */ |
50 | #define IGNORE_VBAT_HIGHCUR -500000 |
51 | |
52 | #define LOW_BAT_CHECK_INTERVAL (HZ / 16) /* 62.5 ms */ |
53 | |
54 | #define VALID_CAPACITY_SEC (45 * 60) /* 45 minutes */ |
55 | #define BATT_OK_MIN 2360 /* mV */ |
56 | #define BATT_OK_INCREMENT 50 /* mV */ |
57 | #define BATT_OK_MAX_NR_INCREMENTS 0xE |
58 | |
59 | /* FG constants */ |
60 | #define BATT_OVV 0x01 |
61 | |
62 | /** |
63 | * struct ab8500_fg_interrupts - ab8500 fg interrupts |
64 | * @name: name of the interrupt |
65 | * @isr function pointer to the isr |
66 | */ |
67 | struct ab8500_fg_interrupts { |
68 | char *name; |
69 | irqreturn_t (*isr)(int irq, void *data); |
70 | }; |
71 | |
72 | enum ab8500_fg_discharge_state { |
73 | AB8500_FG_DISCHARGE_INIT, |
74 | AB8500_FG_DISCHARGE_INITMEASURING, |
75 | AB8500_FG_DISCHARGE_INIT_RECOVERY, |
76 | AB8500_FG_DISCHARGE_RECOVERY, |
77 | AB8500_FG_DISCHARGE_READOUT_INIT, |
78 | AB8500_FG_DISCHARGE_READOUT, |
79 | AB8500_FG_DISCHARGE_WAKEUP, |
80 | }; |
81 | |
82 | static char *discharge_state[] = { |
83 | "DISCHARGE_INIT" , |
84 | "DISCHARGE_INITMEASURING" , |
85 | "DISCHARGE_INIT_RECOVERY" , |
86 | "DISCHARGE_RECOVERY" , |
87 | "DISCHARGE_READOUT_INIT" , |
88 | "DISCHARGE_READOUT" , |
89 | "DISCHARGE_WAKEUP" , |
90 | }; |
91 | |
92 | enum ab8500_fg_charge_state { |
93 | AB8500_FG_CHARGE_INIT, |
94 | AB8500_FG_CHARGE_READOUT, |
95 | }; |
96 | |
97 | static char *charge_state[] = { |
98 | "CHARGE_INIT" , |
99 | "CHARGE_READOUT" , |
100 | }; |
101 | |
102 | enum ab8500_fg_calibration_state { |
103 | AB8500_FG_CALIB_INIT, |
104 | AB8500_FG_CALIB_WAIT, |
105 | AB8500_FG_CALIB_END, |
106 | }; |
107 | |
108 | struct ab8500_fg_avg_cap { |
109 | int avg; |
110 | int samples[NBR_AVG_SAMPLES]; |
111 | time64_t time_stamps[NBR_AVG_SAMPLES]; |
112 | int pos; |
113 | int nbr_samples; |
114 | int sum; |
115 | }; |
116 | |
117 | struct ab8500_fg_cap_scaling { |
118 | bool enable; |
119 | int cap_to_scale[2]; |
120 | int disable_cap_level; |
121 | int scaled_cap; |
122 | }; |
123 | |
124 | struct ab8500_fg_battery_capacity { |
125 | int max_mah_design; |
126 | int max_mah; |
127 | int mah; |
128 | int permille; |
129 | int level; |
130 | int prev_mah; |
131 | int prev_percent; |
132 | int prev_level; |
133 | int user_mah; |
134 | struct ab8500_fg_cap_scaling cap_scale; |
135 | }; |
136 | |
137 | struct ab8500_fg_flags { |
138 | bool fg_enabled; |
139 | bool conv_done; |
140 | bool charging; |
141 | bool fully_charged; |
142 | bool force_full; |
143 | bool low_bat_delay; |
144 | bool low_bat; |
145 | bool bat_ovv; |
146 | bool batt_unknown; |
147 | bool calibrate; |
148 | bool user_cap; |
149 | bool batt_id_received; |
150 | }; |
151 | |
152 | struct inst_curr_result_list { |
153 | struct list_head list; |
154 | int *result; |
155 | }; |
156 | |
157 | /** |
158 | * struct ab8500_fg - ab8500 FG device information |
159 | * @dev: Pointer to the structure device |
160 | * @node: a list of AB8500 FGs, hence prepared for reentrance |
161 | * @irq holds the CCEOC interrupt number |
162 | * @vbat_uv: Battery voltage in uV |
163 | * @vbat_nom_uv: Nominal battery voltage in uV |
164 | * @inst_curr_ua: Instantenous battery current in uA |
165 | * @avg_curr_ua: Average battery current in uA |
166 | * @bat_temp battery temperature |
167 | * @fg_samples: Number of samples used in the FG accumulation |
168 | * @accu_charge: Accumulated charge from the last conversion |
169 | * @recovery_cnt: Counter for recovery mode |
170 | * @high_curr_cnt: Counter for high current mode |
171 | * @init_cnt: Counter for init mode |
172 | * @low_bat_cnt Counter for number of consecutive low battery measures |
173 | * @nbr_cceoc_irq_cnt Counter for number of CCEOC irqs received since enabled |
174 | * @recovery_needed: Indicate if recovery is needed |
175 | * @high_curr_mode: Indicate if we're in high current mode |
176 | * @init_capacity: Indicate if initial capacity measuring should be done |
177 | * @turn_off_fg: True if fg was off before current measurement |
178 | * @calib_state State during offset calibration |
179 | * @discharge_state: Current discharge state |
180 | * @charge_state: Current charge state |
181 | * @ab8500_fg_started Completion struct used for the instant current start |
182 | * @ab8500_fg_complete Completion struct used for the instant current reading |
183 | * @flags: Structure for information about events triggered |
184 | * @bat_cap: Structure for battery capacity specific parameters |
185 | * @avg_cap: Average capacity filter |
186 | * @parent: Pointer to the struct ab8500 |
187 | * @main_bat_v: ADC channel for the main battery voltage |
188 | * @bm: Platform specific battery management information |
189 | * @fg_psy: Structure that holds the FG specific battery properties |
190 | * @fg_wq: Work queue for running the FG algorithm |
191 | * @fg_periodic_work: Work to run the FG algorithm periodically |
192 | * @fg_low_bat_work: Work to check low bat condition |
193 | * @fg_reinit_work Work used to reset and reinitialise the FG algorithm |
194 | * @fg_work: Work to run the FG algorithm instantly |
195 | * @fg_acc_cur_work: Work to read the FG accumulator |
196 | * @fg_check_hw_failure_work: Work for checking HW state |
197 | * @cc_lock: Mutex for locking the CC |
198 | * @fg_kobject: Structure of type kobject |
199 | */ |
200 | struct ab8500_fg { |
201 | struct device *dev; |
202 | struct list_head node; |
203 | int irq; |
204 | int vbat_uv; |
205 | int vbat_nom_uv; |
206 | int inst_curr_ua; |
207 | int avg_curr_ua; |
208 | int bat_temp; |
209 | int fg_samples; |
210 | int accu_charge; |
211 | int recovery_cnt; |
212 | int high_curr_cnt; |
213 | int init_cnt; |
214 | int low_bat_cnt; |
215 | int nbr_cceoc_irq_cnt; |
216 | u32 line_impedance_uohm; |
217 | bool recovery_needed; |
218 | bool high_curr_mode; |
219 | bool init_capacity; |
220 | bool turn_off_fg; |
221 | enum ab8500_fg_calibration_state calib_state; |
222 | enum ab8500_fg_discharge_state discharge_state; |
223 | enum ab8500_fg_charge_state charge_state; |
224 | struct completion ab8500_fg_started; |
225 | struct completion ab8500_fg_complete; |
226 | struct ab8500_fg_flags flags; |
227 | struct ab8500_fg_battery_capacity bat_cap; |
228 | struct ab8500_fg_avg_cap avg_cap; |
229 | struct ab8500 *parent; |
230 | struct iio_channel *main_bat_v; |
231 | struct ab8500_bm_data *bm; |
232 | struct power_supply *fg_psy; |
233 | struct workqueue_struct *fg_wq; |
234 | struct delayed_work fg_periodic_work; |
235 | struct delayed_work fg_low_bat_work; |
236 | struct delayed_work fg_reinit_work; |
237 | struct work_struct fg_work; |
238 | struct work_struct fg_acc_cur_work; |
239 | struct delayed_work fg_check_hw_failure_work; |
240 | struct mutex cc_lock; |
241 | struct kobject fg_kobject; |
242 | }; |
243 | static LIST_HEAD(ab8500_fg_list); |
244 | |
245 | /** |
246 | * ab8500_fg_get() - returns a reference to the primary AB8500 fuel gauge |
247 | * (i.e. the first fuel gauge in the instance list) |
248 | */ |
249 | struct ab8500_fg *ab8500_fg_get(void) |
250 | { |
251 | return list_first_entry_or_null(&ab8500_fg_list, struct ab8500_fg, |
252 | node); |
253 | } |
254 | |
255 | /* Main battery properties */ |
256 | static enum power_supply_property ab8500_fg_props[] = { |
257 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
258 | POWER_SUPPLY_PROP_CURRENT_NOW, |
259 | POWER_SUPPLY_PROP_CURRENT_AVG, |
260 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
261 | POWER_SUPPLY_PROP_ENERGY_FULL, |
262 | POWER_SUPPLY_PROP_ENERGY_NOW, |
263 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, |
264 | POWER_SUPPLY_PROP_CHARGE_FULL, |
265 | POWER_SUPPLY_PROP_CHARGE_NOW, |
266 | POWER_SUPPLY_PROP_CAPACITY, |
267 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
268 | }; |
269 | |
270 | /* |
271 | * This array maps the raw hex value to lowbat voltage used by the AB8500 |
272 | * Values taken from the UM0836, in microvolts. |
273 | */ |
274 | static int ab8500_fg_lowbat_voltage_map[] = { |
275 | 2300000, |
276 | 2325000, |
277 | 2350000, |
278 | 2375000, |
279 | 2400000, |
280 | 2425000, |
281 | 2450000, |
282 | 2475000, |
283 | 2500000, |
284 | 2525000, |
285 | 2550000, |
286 | 2575000, |
287 | 2600000, |
288 | 2625000, |
289 | 2650000, |
290 | 2675000, |
291 | 2700000, |
292 | 2725000, |
293 | 2750000, |
294 | 2775000, |
295 | 2800000, |
296 | 2825000, |
297 | 2850000, |
298 | 2875000, |
299 | 2900000, |
300 | 2925000, |
301 | 2950000, |
302 | 2975000, |
303 | 3000000, |
304 | 3025000, |
305 | 3050000, |
306 | 3075000, |
307 | 3100000, |
308 | 3125000, |
309 | 3150000, |
310 | 3175000, |
311 | 3200000, |
312 | 3225000, |
313 | 3250000, |
314 | 3275000, |
315 | 3300000, |
316 | 3325000, |
317 | 3350000, |
318 | 3375000, |
319 | 3400000, |
320 | 3425000, |
321 | 3450000, |
322 | 3475000, |
323 | 3500000, |
324 | 3525000, |
325 | 3550000, |
326 | 3575000, |
327 | 3600000, |
328 | 3625000, |
329 | 3650000, |
330 | 3675000, |
331 | 3700000, |
332 | 3725000, |
333 | 3750000, |
334 | 3775000, |
335 | 3800000, |
336 | 3825000, |
337 | 3850000, |
338 | 3850000, |
339 | }; |
340 | |
341 | static u8 ab8500_volt_to_regval(int voltage_uv) |
342 | { |
343 | int i; |
344 | |
345 | if (voltage_uv < ab8500_fg_lowbat_voltage_map[0]) |
346 | return 0; |
347 | |
348 | for (i = 0; i < ARRAY_SIZE(ab8500_fg_lowbat_voltage_map); i++) { |
349 | if (voltage_uv < ab8500_fg_lowbat_voltage_map[i]) |
350 | return (u8) i - 1; |
351 | } |
352 | |
353 | /* If not captured above, return index of last element */ |
354 | return (u8) ARRAY_SIZE(ab8500_fg_lowbat_voltage_map) - 1; |
355 | } |
356 | |
357 | /** |
358 | * ab8500_fg_is_low_curr() - Low or high current mode |
359 | * @di: pointer to the ab8500_fg structure |
360 | * @curr_ua: the current to base or our decision on in microampere |
361 | * |
362 | * Low current mode if the current consumption is below a certain threshold |
363 | */ |
364 | static int ab8500_fg_is_low_curr(struct ab8500_fg *di, int curr_ua) |
365 | { |
366 | /* |
367 | * We want to know if we're in low current mode |
368 | */ |
369 | if (curr_ua > -di->bm->fg_params->high_curr_threshold_ua) |
370 | return true; |
371 | else |
372 | return false; |
373 | } |
374 | |
375 | /** |
376 | * ab8500_fg_add_cap_sample() - Add capacity to average filter |
377 | * @di: pointer to the ab8500_fg structure |
378 | * @sample: the capacity in mAh to add to the filter |
379 | * |
380 | * A capacity is added to the filter and a new mean capacity is calculated and |
381 | * returned |
382 | */ |
383 | static int ab8500_fg_add_cap_sample(struct ab8500_fg *di, int sample) |
384 | { |
385 | time64_t now = ktime_get_boottime_seconds(); |
386 | struct ab8500_fg_avg_cap *avg = &di->avg_cap; |
387 | |
388 | do { |
389 | avg->sum += sample - avg->samples[avg->pos]; |
390 | avg->samples[avg->pos] = sample; |
391 | avg->time_stamps[avg->pos] = now; |
392 | avg->pos++; |
393 | |
394 | if (avg->pos == NBR_AVG_SAMPLES) |
395 | avg->pos = 0; |
396 | |
397 | if (avg->nbr_samples < NBR_AVG_SAMPLES) |
398 | avg->nbr_samples++; |
399 | |
400 | /* |
401 | * Check the time stamp for each sample. If too old, |
402 | * replace with latest sample |
403 | */ |
404 | } while (now - VALID_CAPACITY_SEC > avg->time_stamps[avg->pos]); |
405 | |
406 | avg->avg = avg->sum / avg->nbr_samples; |
407 | |
408 | return avg->avg; |
409 | } |
410 | |
411 | /** |
412 | * ab8500_fg_clear_cap_samples() - Clear average filter |
413 | * @di: pointer to the ab8500_fg structure |
414 | * |
415 | * The capacity filter is reset to zero. |
416 | */ |
417 | static void ab8500_fg_clear_cap_samples(struct ab8500_fg *di) |
418 | { |
419 | int i; |
420 | struct ab8500_fg_avg_cap *avg = &di->avg_cap; |
421 | |
422 | avg->pos = 0; |
423 | avg->nbr_samples = 0; |
424 | avg->sum = 0; |
425 | avg->avg = 0; |
426 | |
427 | for (i = 0; i < NBR_AVG_SAMPLES; i++) { |
428 | avg->samples[i] = 0; |
429 | avg->time_stamps[i] = 0; |
430 | } |
431 | } |
432 | |
433 | /** |
434 | * ab8500_fg_fill_cap_sample() - Fill average filter |
435 | * @di: pointer to the ab8500_fg structure |
436 | * @sample: the capacity in mAh to fill the filter with |
437 | * |
438 | * The capacity filter is filled with a capacity in mAh |
439 | */ |
440 | static void ab8500_fg_fill_cap_sample(struct ab8500_fg *di, int sample) |
441 | { |
442 | int i; |
443 | time64_t now; |
444 | struct ab8500_fg_avg_cap *avg = &di->avg_cap; |
445 | |
446 | now = ktime_get_boottime_seconds(); |
447 | |
448 | for (i = 0; i < NBR_AVG_SAMPLES; i++) { |
449 | avg->samples[i] = sample; |
450 | avg->time_stamps[i] = now; |
451 | } |
452 | |
453 | avg->pos = 0; |
454 | avg->nbr_samples = NBR_AVG_SAMPLES; |
455 | avg->sum = sample * NBR_AVG_SAMPLES; |
456 | avg->avg = sample; |
457 | } |
458 | |
459 | /** |
460 | * ab8500_fg_coulomb_counter() - enable coulomb counter |
461 | * @di: pointer to the ab8500_fg structure |
462 | * @enable: enable/disable |
463 | * |
464 | * Enable/Disable coulomb counter. |
465 | * On failure returns negative value. |
466 | */ |
467 | static int ab8500_fg_coulomb_counter(struct ab8500_fg *di, bool enable) |
468 | { |
469 | int ret = 0; |
470 | mutex_lock(&di->cc_lock); |
471 | if (enable) { |
472 | /* To be able to reprogram the number of samples, we have to |
473 | * first stop the CC and then enable it again */ |
474 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_RTC, |
475 | AB8500_RTC_CC_CONF_REG, value: 0x00); |
476 | if (ret) |
477 | goto cc_err; |
478 | |
479 | /* Program the samples */ |
480 | ret = abx500_set_register_interruptible(dev: di->dev, |
481 | AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU, |
482 | value: di->fg_samples); |
483 | if (ret) |
484 | goto cc_err; |
485 | |
486 | /* Start the CC */ |
487 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_RTC, |
488 | AB8500_RTC_CC_CONF_REG, |
489 | value: (CC_DEEP_SLEEP_ENA | CC_PWR_UP_ENA)); |
490 | if (ret) |
491 | goto cc_err; |
492 | |
493 | di->flags.fg_enabled = true; |
494 | } else { |
495 | /* Clear any pending read requests */ |
496 | ret = abx500_mask_and_set_register_interruptible(dev: di->dev, |
497 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, |
498 | bitmask: (RESET_ACCU | READ_REQ), bitvalues: 0); |
499 | if (ret) |
500 | goto cc_err; |
501 | |
502 | ret = abx500_set_register_interruptible(dev: di->dev, |
503 | AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU_CTRL, value: 0); |
504 | if (ret) |
505 | goto cc_err; |
506 | |
507 | /* Stop the CC */ |
508 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_RTC, |
509 | AB8500_RTC_CC_CONF_REG, value: 0); |
510 | if (ret) |
511 | goto cc_err; |
512 | |
513 | di->flags.fg_enabled = false; |
514 | |
515 | } |
516 | dev_dbg(di->dev, " CC enabled: %d Samples: %d\n" , |
517 | enable, di->fg_samples); |
518 | |
519 | mutex_unlock(lock: &di->cc_lock); |
520 | |
521 | return ret; |
522 | cc_err: |
523 | dev_err(di->dev, "%s Enabling coulomb counter failed\n" , __func__); |
524 | mutex_unlock(lock: &di->cc_lock); |
525 | return ret; |
526 | } |
527 | |
528 | /** |
529 | * ab8500_fg_inst_curr_start() - start battery instantaneous current |
530 | * @di: pointer to the ab8500_fg structure |
531 | * |
532 | * Returns 0 or error code |
533 | * Note: This is part "one" and has to be called before |
534 | * ab8500_fg_inst_curr_finalize() |
535 | */ |
536 | int ab8500_fg_inst_curr_start(struct ab8500_fg *di) |
537 | { |
538 | u8 reg_val; |
539 | int ret; |
540 | |
541 | mutex_lock(&di->cc_lock); |
542 | |
543 | di->nbr_cceoc_irq_cnt = 0; |
544 | ret = abx500_get_register_interruptible(dev: di->dev, AB8500_RTC, |
545 | AB8500_RTC_CC_CONF_REG, value: ®_val); |
546 | if (ret < 0) |
547 | goto fail; |
548 | |
549 | if (!(reg_val & CC_PWR_UP_ENA)) { |
550 | dev_dbg(di->dev, "%s Enable FG\n" , __func__); |
551 | di->turn_off_fg = true; |
552 | |
553 | /* Program the samples */ |
554 | ret = abx500_set_register_interruptible(dev: di->dev, |
555 | AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU, |
556 | SEC_TO_SAMPLE(10)); |
557 | if (ret) |
558 | goto fail; |
559 | |
560 | /* Start the CC */ |
561 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_RTC, |
562 | AB8500_RTC_CC_CONF_REG, |
563 | value: (CC_DEEP_SLEEP_ENA | CC_PWR_UP_ENA)); |
564 | if (ret) |
565 | goto fail; |
566 | } else { |
567 | di->turn_off_fg = false; |
568 | } |
569 | |
570 | /* Return and WFI */ |
571 | reinit_completion(x: &di->ab8500_fg_started); |
572 | reinit_completion(x: &di->ab8500_fg_complete); |
573 | enable_irq(irq: di->irq); |
574 | |
575 | /* Note: cc_lock is still locked */ |
576 | return 0; |
577 | fail: |
578 | mutex_unlock(lock: &di->cc_lock); |
579 | return ret; |
580 | } |
581 | |
582 | /** |
583 | * ab8500_fg_inst_curr_started() - check if fg conversion has started |
584 | * @di: pointer to the ab8500_fg structure |
585 | * |
586 | * Returns 1 if conversion started, 0 if still waiting |
587 | */ |
588 | int ab8500_fg_inst_curr_started(struct ab8500_fg *di) |
589 | { |
590 | return completion_done(x: &di->ab8500_fg_started); |
591 | } |
592 | |
593 | /** |
594 | * ab8500_fg_inst_curr_done() - check if fg conversion is done |
595 | * @di: pointer to the ab8500_fg structure |
596 | * |
597 | * Returns 1 if conversion done, 0 if still waiting |
598 | */ |
599 | int ab8500_fg_inst_curr_done(struct ab8500_fg *di) |
600 | { |
601 | return completion_done(x: &di->ab8500_fg_complete); |
602 | } |
603 | |
604 | /** |
605 | * ab8500_fg_inst_curr_finalize() - battery instantaneous current |
606 | * @di: pointer to the ab8500_fg structure |
607 | * @curr_ua: battery instantenous current in microampere (on success) |
608 | * |
609 | * Returns 0 or an error code |
610 | * Note: This is part "two" and has to be called at earliest 250 ms |
611 | * after ab8500_fg_inst_curr_start() |
612 | */ |
613 | int ab8500_fg_inst_curr_finalize(struct ab8500_fg *di, int *curr_ua) |
614 | { |
615 | u8 low, high; |
616 | int val; |
617 | int ret; |
618 | unsigned long timeout; |
619 | |
620 | if (!completion_done(x: &di->ab8500_fg_complete)) { |
621 | timeout = wait_for_completion_timeout( |
622 | x: &di->ab8500_fg_complete, |
623 | INS_CURR_TIMEOUT); |
624 | dev_dbg(di->dev, "Finalize time: %d ms\n" , |
625 | jiffies_to_msecs(INS_CURR_TIMEOUT - timeout)); |
626 | if (!timeout) { |
627 | ret = -ETIME; |
628 | disable_irq(irq: di->irq); |
629 | di->nbr_cceoc_irq_cnt = 0; |
630 | dev_err(di->dev, "completion timed out [%d]\n" , |
631 | __LINE__); |
632 | goto fail; |
633 | } |
634 | } |
635 | |
636 | disable_irq(irq: di->irq); |
637 | di->nbr_cceoc_irq_cnt = 0; |
638 | |
639 | ret = abx500_mask_and_set_register_interruptible(dev: di->dev, |
640 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, |
641 | READ_REQ, READ_REQ); |
642 | |
643 | /* 100uS between read request and read is needed */ |
644 | usleep_range(min: 100, max: 100); |
645 | |
646 | /* Read CC Sample conversion value Low and high */ |
647 | ret = abx500_get_register_interruptible(dev: di->dev, AB8500_GAS_GAUGE, |
648 | AB8500_GASG_CC_SMPL_CNVL_REG, value: &low); |
649 | if (ret < 0) |
650 | goto fail; |
651 | |
652 | ret = abx500_get_register_interruptible(dev: di->dev, AB8500_GAS_GAUGE, |
653 | AB8500_GASG_CC_SMPL_CNVH_REG, value: &high); |
654 | if (ret < 0) |
655 | goto fail; |
656 | |
657 | /* |
658 | * negative value for Discharging |
659 | * convert 2's complement into decimal |
660 | */ |
661 | if (high & 0x10) |
662 | val = (low | (high << 8) | 0xFFFFE000); |
663 | else |
664 | val = (low | (high << 8)); |
665 | |
666 | /* |
667 | * Convert to unit value in mA |
668 | * Full scale input voltage is |
669 | * 63.160mV => LSB = 63.160mV/(4096*res) = 1.542.000 uA |
670 | * Given a 250ms conversion cycle time the LSB corresponds |
671 | * to 107.1 nAh. Convert to current by dividing by the conversion |
672 | * time in hours (250ms = 1 / (3600 * 4)h) |
673 | * 107.1nAh assumes 10mOhm, but fg_res is in 0.1mOhm |
674 | */ |
675 | val = (val * QLSB_NANO_AMP_HOURS_X10 * 36 * 4) / di->bm->fg_res; |
676 | |
677 | if (di->turn_off_fg) { |
678 | dev_dbg(di->dev, "%s Disable FG\n" , __func__); |
679 | |
680 | /* Clear any pending read requests */ |
681 | ret = abx500_set_register_interruptible(dev: di->dev, |
682 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, value: 0); |
683 | if (ret) |
684 | goto fail; |
685 | |
686 | /* Stop the CC */ |
687 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_RTC, |
688 | AB8500_RTC_CC_CONF_REG, value: 0); |
689 | if (ret) |
690 | goto fail; |
691 | } |
692 | mutex_unlock(lock: &di->cc_lock); |
693 | *curr_ua = val; |
694 | |
695 | return 0; |
696 | fail: |
697 | mutex_unlock(lock: &di->cc_lock); |
698 | return ret; |
699 | } |
700 | |
701 | /** |
702 | * ab8500_fg_inst_curr_blocking() - battery instantaneous current |
703 | * @di: pointer to the ab8500_fg structure |
704 | * |
705 | * Returns battery instantenous current in microampere (on success) |
706 | * else error code |
707 | */ |
708 | int ab8500_fg_inst_curr_blocking(struct ab8500_fg *di) |
709 | { |
710 | int ret; |
711 | unsigned long timeout; |
712 | int curr_ua = 0; |
713 | |
714 | ret = ab8500_fg_inst_curr_start(di); |
715 | if (ret) { |
716 | dev_err(di->dev, "Failed to initialize fg_inst\n" ); |
717 | return 0; |
718 | } |
719 | |
720 | /* Wait for CC to actually start */ |
721 | if (!completion_done(x: &di->ab8500_fg_started)) { |
722 | timeout = wait_for_completion_timeout( |
723 | x: &di->ab8500_fg_started, |
724 | INS_CURR_TIMEOUT); |
725 | dev_dbg(di->dev, "Start time: %d ms\n" , |
726 | jiffies_to_msecs(INS_CURR_TIMEOUT - timeout)); |
727 | if (!timeout) { |
728 | ret = -ETIME; |
729 | dev_err(di->dev, "completion timed out [%d]\n" , |
730 | __LINE__); |
731 | goto fail; |
732 | } |
733 | } |
734 | |
735 | ret = ab8500_fg_inst_curr_finalize(di, curr_ua: &curr_ua); |
736 | if (ret) { |
737 | dev_err(di->dev, "Failed to finalize fg_inst\n" ); |
738 | return 0; |
739 | } |
740 | |
741 | dev_dbg(di->dev, "%s instant current: %d uA" , __func__, curr_ua); |
742 | return curr_ua; |
743 | fail: |
744 | disable_irq(irq: di->irq); |
745 | mutex_unlock(lock: &di->cc_lock); |
746 | return ret; |
747 | } |
748 | |
749 | /** |
750 | * ab8500_fg_acc_cur_work() - average battery current |
751 | * @work: pointer to the work_struct structure |
752 | * |
753 | * Updated the average battery current obtained from the |
754 | * coulomb counter. |
755 | */ |
756 | static void ab8500_fg_acc_cur_work(struct work_struct *work) |
757 | { |
758 | int val; |
759 | int ret; |
760 | u8 low, med, high; |
761 | |
762 | struct ab8500_fg *di = container_of(work, |
763 | struct ab8500_fg, fg_acc_cur_work); |
764 | |
765 | mutex_lock(&di->cc_lock); |
766 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_GAS_GAUGE, |
767 | AB8500_GASG_CC_NCOV_ACCU_CTRL, RD_NCONV_ACCU_REQ); |
768 | if (ret) |
769 | goto exit; |
770 | |
771 | ret = abx500_get_register_interruptible(dev: di->dev, AB8500_GAS_GAUGE, |
772 | AB8500_GASG_CC_NCOV_ACCU_LOW, value: &low); |
773 | if (ret < 0) |
774 | goto exit; |
775 | |
776 | ret = abx500_get_register_interruptible(dev: di->dev, AB8500_GAS_GAUGE, |
777 | AB8500_GASG_CC_NCOV_ACCU_MED, value: &med); |
778 | if (ret < 0) |
779 | goto exit; |
780 | |
781 | ret = abx500_get_register_interruptible(dev: di->dev, AB8500_GAS_GAUGE, |
782 | AB8500_GASG_CC_NCOV_ACCU_HIGH, value: &high); |
783 | if (ret < 0) |
784 | goto exit; |
785 | |
786 | /* Check for sign bit in case of negative value, 2's complement */ |
787 | if (high & 0x10) |
788 | val = (low | (med << 8) | (high << 16) | 0xFFE00000); |
789 | else |
790 | val = (low | (med << 8) | (high << 16)); |
791 | |
792 | /* |
793 | * Convert to uAh |
794 | * Given a 250ms conversion cycle time the LSB corresponds |
795 | * to 112.9 nAh. |
796 | * 112.9nAh assumes 10mOhm, but fg_res is in 0.1mOhm |
797 | */ |
798 | di->accu_charge = (val * QLSB_NANO_AMP_HOURS_X10) / |
799 | (100 * di->bm->fg_res); |
800 | |
801 | /* |
802 | * Convert to unit value in uA |
803 | * by dividing by the conversion |
804 | * time in hours (= samples / (3600 * 4)h) |
805 | */ |
806 | di->avg_curr_ua = (val * QLSB_NANO_AMP_HOURS_X10 * 36) / |
807 | (di->bm->fg_res * (di->fg_samples / 4)); |
808 | |
809 | di->flags.conv_done = true; |
810 | |
811 | mutex_unlock(lock: &di->cc_lock); |
812 | |
813 | queue_work(wq: di->fg_wq, work: &di->fg_work); |
814 | |
815 | dev_dbg(di->dev, "fg_res: %d, fg_samples: %d, gasg: %d, accu_charge: %d \n" , |
816 | di->bm->fg_res, di->fg_samples, val, di->accu_charge); |
817 | return; |
818 | exit: |
819 | dev_err(di->dev, |
820 | "Failed to read or write gas gauge registers\n" ); |
821 | mutex_unlock(lock: &di->cc_lock); |
822 | queue_work(wq: di->fg_wq, work: &di->fg_work); |
823 | } |
824 | |
825 | /** |
826 | * ab8500_fg_bat_voltage() - get battery voltage |
827 | * @di: pointer to the ab8500_fg structure |
828 | * |
829 | * Returns battery voltage in microvolts (on success) else error code |
830 | */ |
831 | static int ab8500_fg_bat_voltage(struct ab8500_fg *di) |
832 | { |
833 | int vbat, ret; |
834 | static int prev; |
835 | |
836 | ret = iio_read_channel_processed(chan: di->main_bat_v, val: &vbat); |
837 | if (ret < 0) { |
838 | dev_err(di->dev, |
839 | "%s ADC conversion failed, using previous value\n" , |
840 | __func__); |
841 | return prev; |
842 | } |
843 | |
844 | /* IIO returns millivolts but we want microvolts */ |
845 | vbat *= 1000; |
846 | prev = vbat; |
847 | return vbat; |
848 | } |
849 | |
850 | /** |
851 | * ab8500_fg_volt_to_capacity() - Voltage based capacity |
852 | * @di: pointer to the ab8500_fg structure |
853 | * @voltage_uv: The voltage to convert to a capacity in microvolt |
854 | * |
855 | * Returns battery capacity in per mille based on voltage |
856 | */ |
857 | static int ab8500_fg_volt_to_capacity(struct ab8500_fg *di, int voltage_uv) |
858 | { |
859 | struct power_supply_battery_info *bi = di->bm->bi; |
860 | |
861 | /* Multiply by 10 because the capacity is tracked in per mille */ |
862 | return power_supply_batinfo_ocv2cap(info: bi, ocv: voltage_uv, temp: di->bat_temp) * 10; |
863 | } |
864 | |
865 | /** |
866 | * ab8500_fg_uncomp_volt_to_capacity() - Uncompensated voltage based capacity |
867 | * @di: pointer to the ab8500_fg structure |
868 | * |
869 | * Returns battery capacity based on battery voltage that is not compensated |
870 | * for the voltage drop due to the load |
871 | */ |
872 | static int ab8500_fg_uncomp_volt_to_capacity(struct ab8500_fg *di) |
873 | { |
874 | di->vbat_uv = ab8500_fg_bat_voltage(di); |
875 | return ab8500_fg_volt_to_capacity(di, voltage_uv: di->vbat_uv); |
876 | } |
877 | |
878 | /** |
879 | * ab8500_fg_battery_resistance() - Returns the battery inner resistance |
880 | * @di: pointer to the ab8500_fg structure |
881 | * @vbat_uncomp_uv: Uncompensated VBAT voltage |
882 | * |
883 | * Returns battery inner resistance added with the fuel gauge resistor value |
884 | * to get the total resistance in the whole link from gnd to bat+ node |
885 | * in milliohm. |
886 | */ |
887 | static int ab8500_fg_battery_resistance(struct ab8500_fg *di, int vbat_uncomp_uv) |
888 | { |
889 | struct power_supply_battery_info *bi = di->bm->bi; |
890 | int resistance_percent = 0; |
891 | int resistance; |
892 | |
893 | /* |
894 | * Determine the resistance at this voltage. First try VBAT-to-Ri else |
895 | * just infer it from the surrounding temperature, if nothing works just |
896 | * use the internal resistance. |
897 | */ |
898 | if (power_supply_supports_vbat2ri(info: bi)) { |
899 | resistance = power_supply_vbat2ri(info: bi, vbat_uv: vbat_uncomp_uv, charging: di->flags.charging); |
900 | /* Convert to milliohm */ |
901 | resistance = resistance / 1000; |
902 | } else if (power_supply_supports_temp2ri(info: bi)) { |
903 | resistance_percent = power_supply_temp2resist_simple(table: bi->resist_table, |
904 | table_len: bi->resist_table_size, |
905 | temp: di->bat_temp / 10); |
906 | /* Convert to milliohm */ |
907 | resistance = bi->factory_internal_resistance_uohm / 1000; |
908 | resistance = resistance * resistance_percent / 100; |
909 | } else { |
910 | /* Last fallback */ |
911 | resistance = bi->factory_internal_resistance_uohm / 1000; |
912 | } |
913 | |
914 | /* Compensate for line impedance */ |
915 | resistance += (di->line_impedance_uohm / 1000); |
916 | |
917 | dev_dbg(di->dev, "%s Temp: %d battery internal resistance: %d" |
918 | " fg resistance %d, total: %d (mOhm)\n" , |
919 | __func__, di->bat_temp, resistance, di->bm->fg_res / 10, |
920 | (di->bm->fg_res / 10) + resistance); |
921 | |
922 | /* fg_res variable is in 0.1mOhm */ |
923 | resistance += di->bm->fg_res / 10; |
924 | |
925 | return resistance; |
926 | } |
927 | |
928 | /** |
929 | * ab8500_load_comp_fg_bat_voltage() - get load compensated battery voltage |
930 | * @di: pointer to the ab8500_fg structure |
931 | * @always: always return a voltage, also uncompensated |
932 | * |
933 | * Returns compensated battery voltage (on success) else error code. |
934 | * If always is specified, we always return a voltage but it may be |
935 | * uncompensated. |
936 | */ |
937 | static int ab8500_load_comp_fg_bat_voltage(struct ab8500_fg *di, bool always) |
938 | { |
939 | int i = 0; |
940 | int vbat_uv = 0; |
941 | int rcomp; |
942 | |
943 | /* Average the instant current to get a stable current measurement */ |
944 | ab8500_fg_inst_curr_start(di); |
945 | |
946 | do { |
947 | vbat_uv += ab8500_fg_bat_voltage(di); |
948 | i++; |
949 | usleep_range(min: 5000, max: 6000); |
950 | } while (!ab8500_fg_inst_curr_done(di) && |
951 | i <= WAIT_FOR_INST_CURRENT_MAX); |
952 | |
953 | if (i > WAIT_FOR_INST_CURRENT_MAX) { |
954 | dev_err(di->dev, |
955 | "TIMEOUT: return uncompensated measurement of VBAT\n" ); |
956 | di->vbat_uv = vbat_uv / i; |
957 | return di->vbat_uv; |
958 | } |
959 | |
960 | ab8500_fg_inst_curr_finalize(di, curr_ua: &di->inst_curr_ua); |
961 | |
962 | /* |
963 | * If there is too high current dissipation, the compensation cannot be |
964 | * trusted so return an error unless we must return something here, as |
965 | * enforced by the "always" parameter. |
966 | */ |
967 | if (!always && di->inst_curr_ua < IGNORE_VBAT_HIGHCUR) |
968 | return -EINVAL; |
969 | |
970 | vbat_uv = vbat_uv / i; |
971 | |
972 | /* Next we apply voltage compensation from internal resistance */ |
973 | rcomp = ab8500_fg_battery_resistance(di, vbat_uncomp_uv: vbat_uv); |
974 | vbat_uv = vbat_uv - (di->inst_curr_ua * rcomp) / 1000; |
975 | |
976 | /* Always keep this state at latest measurement */ |
977 | di->vbat_uv = vbat_uv; |
978 | |
979 | return vbat_uv; |
980 | } |
981 | |
982 | /** |
983 | * ab8500_fg_load_comp_volt_to_capacity() - Load compensated voltage based capacity |
984 | * @di: pointer to the ab8500_fg structure |
985 | * |
986 | * Returns battery capacity based on battery voltage that is load compensated |
987 | * for the voltage drop |
988 | */ |
989 | static int ab8500_fg_load_comp_volt_to_capacity(struct ab8500_fg *di) |
990 | { |
991 | int vbat_comp_uv; |
992 | |
993 | vbat_comp_uv = ab8500_load_comp_fg_bat_voltage(di, always: true); |
994 | |
995 | return ab8500_fg_volt_to_capacity(di, voltage_uv: vbat_comp_uv); |
996 | } |
997 | |
998 | /** |
999 | * ab8500_fg_convert_mah_to_permille() - Capacity in mAh to permille |
1000 | * @di: pointer to the ab8500_fg structure |
1001 | * @cap_mah: capacity in mAh |
1002 | * |
1003 | * Converts capacity in mAh to capacity in permille |
1004 | */ |
1005 | static int ab8500_fg_convert_mah_to_permille(struct ab8500_fg *di, int cap_mah) |
1006 | { |
1007 | return (cap_mah * 1000) / di->bat_cap.max_mah_design; |
1008 | } |
1009 | |
1010 | /** |
1011 | * ab8500_fg_convert_permille_to_mah() - Capacity in permille to mAh |
1012 | * @di: pointer to the ab8500_fg structure |
1013 | * @cap_pm: capacity in permille |
1014 | * |
1015 | * Converts capacity in permille to capacity in mAh |
1016 | */ |
1017 | static int ab8500_fg_convert_permille_to_mah(struct ab8500_fg *di, int cap_pm) |
1018 | { |
1019 | return cap_pm * di->bat_cap.max_mah_design / 1000; |
1020 | } |
1021 | |
1022 | /** |
1023 | * ab8500_fg_convert_mah_to_uwh() - Capacity in mAh to uWh |
1024 | * @di: pointer to the ab8500_fg structure |
1025 | * @cap_mah: capacity in mAh |
1026 | * |
1027 | * Converts capacity in mAh to capacity in uWh |
1028 | */ |
1029 | static int ab8500_fg_convert_mah_to_uwh(struct ab8500_fg *di, int cap_mah) |
1030 | { |
1031 | u64 div_res; |
1032 | u32 div_rem; |
1033 | |
1034 | /* |
1035 | * Capacity is in milli ampere hours (10^-3)Ah |
1036 | * Nominal voltage is in microvolts (10^-6)V |
1037 | * divide by 1000000 after multiplication to get to mWh |
1038 | */ |
1039 | div_res = ((u64) cap_mah) * ((u64) di->vbat_nom_uv); |
1040 | div_rem = do_div(div_res, 1000000); |
1041 | |
1042 | /* Make sure to round upwards if necessary */ |
1043 | if (div_rem >= 1000000 / 2) |
1044 | div_res++; |
1045 | |
1046 | return (int) div_res; |
1047 | } |
1048 | |
1049 | /** |
1050 | * ab8500_fg_calc_cap_charging() - Calculate remaining capacity while charging |
1051 | * @di: pointer to the ab8500_fg structure |
1052 | * |
1053 | * Return the capacity in mAh based on previous calculated capcity and the FG |
1054 | * accumulator register value. The filter is filled with this capacity |
1055 | */ |
1056 | static int ab8500_fg_calc_cap_charging(struct ab8500_fg *di) |
1057 | { |
1058 | dev_dbg(di->dev, "%s cap_mah %d accu_charge %d\n" , |
1059 | __func__, |
1060 | di->bat_cap.mah, |
1061 | di->accu_charge); |
1062 | |
1063 | /* Capacity should not be less than 0 */ |
1064 | if (di->bat_cap.mah + di->accu_charge > 0) |
1065 | di->bat_cap.mah += di->accu_charge; |
1066 | else |
1067 | di->bat_cap.mah = 0; |
1068 | /* |
1069 | * We force capacity to 100% once when the algorithm |
1070 | * reports that it's full. |
1071 | */ |
1072 | if (di->bat_cap.mah >= di->bat_cap.max_mah_design || |
1073 | di->flags.force_full) { |
1074 | di->bat_cap.mah = di->bat_cap.max_mah_design; |
1075 | } |
1076 | |
1077 | ab8500_fg_fill_cap_sample(di, sample: di->bat_cap.mah); |
1078 | di->bat_cap.permille = |
1079 | ab8500_fg_convert_mah_to_permille(di, cap_mah: di->bat_cap.mah); |
1080 | |
1081 | /* We need to update battery voltage and inst current when charging */ |
1082 | di->vbat_uv = ab8500_fg_bat_voltage(di); |
1083 | di->inst_curr_ua = ab8500_fg_inst_curr_blocking(di); |
1084 | |
1085 | return di->bat_cap.mah; |
1086 | } |
1087 | |
1088 | /** |
1089 | * ab8500_fg_calc_cap_discharge_voltage() - Capacity in discharge with voltage |
1090 | * @di: pointer to the ab8500_fg structure |
1091 | * |
1092 | * Return the capacity in mAh based on the load compensated battery voltage. |
1093 | * This value is added to the filter and a new mean value is calculated and |
1094 | * returned. |
1095 | */ |
1096 | static int ab8500_fg_calc_cap_discharge_voltage(struct ab8500_fg *di) |
1097 | { |
1098 | int permille, mah; |
1099 | |
1100 | permille = ab8500_fg_load_comp_volt_to_capacity(di); |
1101 | |
1102 | mah = ab8500_fg_convert_permille_to_mah(di, cap_pm: permille); |
1103 | |
1104 | di->bat_cap.mah = ab8500_fg_add_cap_sample(di, sample: mah); |
1105 | di->bat_cap.permille = |
1106 | ab8500_fg_convert_mah_to_permille(di, cap_mah: di->bat_cap.mah); |
1107 | |
1108 | return di->bat_cap.mah; |
1109 | } |
1110 | |
1111 | /** |
1112 | * ab8500_fg_calc_cap_discharge_fg() - Capacity in discharge with FG |
1113 | * @di: pointer to the ab8500_fg structure |
1114 | * |
1115 | * Return the capacity in mAh based on previous calculated capcity and the FG |
1116 | * accumulator register value. This value is added to the filter and a |
1117 | * new mean value is calculated and returned. |
1118 | */ |
1119 | static int ab8500_fg_calc_cap_discharge_fg(struct ab8500_fg *di) |
1120 | { |
1121 | int permille_volt, permille; |
1122 | |
1123 | dev_dbg(di->dev, "%s cap_mah %d accu_charge %d\n" , |
1124 | __func__, |
1125 | di->bat_cap.mah, |
1126 | di->accu_charge); |
1127 | |
1128 | /* Capacity should not be less than 0 */ |
1129 | if (di->bat_cap.mah + di->accu_charge > 0) |
1130 | di->bat_cap.mah += di->accu_charge; |
1131 | else |
1132 | di->bat_cap.mah = 0; |
1133 | |
1134 | if (di->bat_cap.mah >= di->bat_cap.max_mah_design) |
1135 | di->bat_cap.mah = di->bat_cap.max_mah_design; |
1136 | |
1137 | /* |
1138 | * Check against voltage based capacity. It can not be lower |
1139 | * than what the uncompensated voltage says |
1140 | */ |
1141 | permille = ab8500_fg_convert_mah_to_permille(di, cap_mah: di->bat_cap.mah); |
1142 | permille_volt = ab8500_fg_uncomp_volt_to_capacity(di); |
1143 | |
1144 | if (permille < permille_volt) { |
1145 | di->bat_cap.permille = permille_volt; |
1146 | di->bat_cap.mah = ab8500_fg_convert_permille_to_mah(di, |
1147 | cap_pm: di->bat_cap.permille); |
1148 | |
1149 | dev_dbg(di->dev, "%s voltage based: perm %d perm_volt %d\n" , |
1150 | __func__, |
1151 | permille, |
1152 | permille_volt); |
1153 | |
1154 | ab8500_fg_fill_cap_sample(di, sample: di->bat_cap.mah); |
1155 | } else { |
1156 | ab8500_fg_fill_cap_sample(di, sample: di->bat_cap.mah); |
1157 | di->bat_cap.permille = |
1158 | ab8500_fg_convert_mah_to_permille(di, cap_mah: di->bat_cap.mah); |
1159 | } |
1160 | |
1161 | return di->bat_cap.mah; |
1162 | } |
1163 | |
1164 | /** |
1165 | * ab8500_fg_capacity_level() - Get the battery capacity level |
1166 | * @di: pointer to the ab8500_fg structure |
1167 | * |
1168 | * Get the battery capacity level based on the capacity in percent |
1169 | */ |
1170 | static int ab8500_fg_capacity_level(struct ab8500_fg *di) |
1171 | { |
1172 | int ret, percent; |
1173 | |
1174 | percent = DIV_ROUND_CLOSEST(di->bat_cap.permille, 10); |
1175 | |
1176 | if (percent <= di->bm->cap_levels->critical || |
1177 | di->flags.low_bat) |
1178 | ret = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; |
1179 | else if (percent <= di->bm->cap_levels->low) |
1180 | ret = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
1181 | else if (percent <= di->bm->cap_levels->normal) |
1182 | ret = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; |
1183 | else if (percent <= di->bm->cap_levels->high) |
1184 | ret = POWER_SUPPLY_CAPACITY_LEVEL_HIGH; |
1185 | else |
1186 | ret = POWER_SUPPLY_CAPACITY_LEVEL_FULL; |
1187 | |
1188 | return ret; |
1189 | } |
1190 | |
1191 | /** |
1192 | * ab8500_fg_calculate_scaled_capacity() - Capacity scaling |
1193 | * @di: pointer to the ab8500_fg structure |
1194 | * |
1195 | * Calculates the capacity to be shown to upper layers. Scales the capacity |
1196 | * to have 100% as a reference from the actual capacity upon removal of charger |
1197 | * when charging is in maintenance mode. |
1198 | */ |
1199 | static int ab8500_fg_calculate_scaled_capacity(struct ab8500_fg *di) |
1200 | { |
1201 | struct ab8500_fg_cap_scaling *cs = &di->bat_cap.cap_scale; |
1202 | int capacity = di->bat_cap.prev_percent; |
1203 | |
1204 | if (!cs->enable) |
1205 | return capacity; |
1206 | |
1207 | /* |
1208 | * As long as we are in fully charge mode scale the capacity |
1209 | * to show 100%. |
1210 | */ |
1211 | if (di->flags.fully_charged) { |
1212 | cs->cap_to_scale[0] = 100; |
1213 | cs->cap_to_scale[1] = |
1214 | max(capacity, di->bm->fg_params->maint_thres); |
1215 | dev_dbg(di->dev, "Scale cap with %d/%d\n" , |
1216 | cs->cap_to_scale[0], cs->cap_to_scale[1]); |
1217 | } |
1218 | |
1219 | /* Calculates the scaled capacity. */ |
1220 | if ((cs->cap_to_scale[0] != cs->cap_to_scale[1]) |
1221 | && (cs->cap_to_scale[1] > 0)) |
1222 | capacity = min(100, |
1223 | DIV_ROUND_CLOSEST(di->bat_cap.prev_percent * |
1224 | cs->cap_to_scale[0], |
1225 | cs->cap_to_scale[1])); |
1226 | |
1227 | if (di->flags.charging) { |
1228 | if (capacity < cs->disable_cap_level) { |
1229 | cs->disable_cap_level = capacity; |
1230 | dev_dbg(di->dev, "Cap to stop scale lowered %d%%\n" , |
1231 | cs->disable_cap_level); |
1232 | } else if (!di->flags.fully_charged) { |
1233 | if (di->bat_cap.prev_percent >= |
1234 | cs->disable_cap_level) { |
1235 | dev_dbg(di->dev, "Disabling scaled capacity\n" ); |
1236 | cs->enable = false; |
1237 | capacity = di->bat_cap.prev_percent; |
1238 | } else { |
1239 | dev_dbg(di->dev, |
1240 | "Waiting in cap to level %d%%\n" , |
1241 | cs->disable_cap_level); |
1242 | capacity = cs->disable_cap_level; |
1243 | } |
1244 | } |
1245 | } |
1246 | |
1247 | return capacity; |
1248 | } |
1249 | |
1250 | /** |
1251 | * ab8500_fg_update_cap_scalers() - Capacity scaling |
1252 | * @di: pointer to the ab8500_fg structure |
1253 | * |
1254 | * To be called when state change from charge<->discharge to update |
1255 | * the capacity scalers. |
1256 | */ |
1257 | static void ab8500_fg_update_cap_scalers(struct ab8500_fg *di) |
1258 | { |
1259 | struct ab8500_fg_cap_scaling *cs = &di->bat_cap.cap_scale; |
1260 | |
1261 | if (!cs->enable) |
1262 | return; |
1263 | if (di->flags.charging) { |
1264 | di->bat_cap.cap_scale.disable_cap_level = |
1265 | di->bat_cap.cap_scale.scaled_cap; |
1266 | dev_dbg(di->dev, "Cap to stop scale at charge %d%%\n" , |
1267 | di->bat_cap.cap_scale.disable_cap_level); |
1268 | } else { |
1269 | if (cs->scaled_cap != 100) { |
1270 | cs->cap_to_scale[0] = cs->scaled_cap; |
1271 | cs->cap_to_scale[1] = di->bat_cap.prev_percent; |
1272 | } else { |
1273 | cs->cap_to_scale[0] = 100; |
1274 | cs->cap_to_scale[1] = |
1275 | max(di->bat_cap.prev_percent, |
1276 | di->bm->fg_params->maint_thres); |
1277 | } |
1278 | |
1279 | dev_dbg(di->dev, "Cap to scale at discharge %d/%d\n" , |
1280 | cs->cap_to_scale[0], cs->cap_to_scale[1]); |
1281 | } |
1282 | } |
1283 | |
1284 | /** |
1285 | * ab8500_fg_check_capacity_limits() - Check if capacity has changed |
1286 | * @di: pointer to the ab8500_fg structure |
1287 | * @init: capacity is allowed to go up in init mode |
1288 | * |
1289 | * Check if capacity or capacity limit has changed and notify the system |
1290 | * about it using the power_supply framework |
1291 | */ |
1292 | static void ab8500_fg_check_capacity_limits(struct ab8500_fg *di, bool init) |
1293 | { |
1294 | bool changed = false; |
1295 | int percent = DIV_ROUND_CLOSEST(di->bat_cap.permille, 10); |
1296 | |
1297 | di->bat_cap.level = ab8500_fg_capacity_level(di); |
1298 | |
1299 | if (di->bat_cap.level != di->bat_cap.prev_level) { |
1300 | /* |
1301 | * We do not allow reported capacity level to go up |
1302 | * unless we're charging or if we're in init |
1303 | */ |
1304 | if (!(!di->flags.charging && di->bat_cap.level > |
1305 | di->bat_cap.prev_level) || init) { |
1306 | dev_dbg(di->dev, "level changed from %d to %d\n" , |
1307 | di->bat_cap.prev_level, |
1308 | di->bat_cap.level); |
1309 | di->bat_cap.prev_level = di->bat_cap.level; |
1310 | changed = true; |
1311 | } else { |
1312 | dev_dbg(di->dev, "level not allowed to go up " |
1313 | "since no charger is connected: %d to %d\n" , |
1314 | di->bat_cap.prev_level, |
1315 | di->bat_cap.level); |
1316 | } |
1317 | } |
1318 | |
1319 | /* |
1320 | * If we have received the LOW_BAT IRQ, set capacity to 0 to initiate |
1321 | * shutdown |
1322 | */ |
1323 | if (di->flags.low_bat) { |
1324 | dev_dbg(di->dev, "Battery low, set capacity to 0\n" ); |
1325 | di->bat_cap.prev_percent = 0; |
1326 | di->bat_cap.permille = 0; |
1327 | percent = 0; |
1328 | di->bat_cap.prev_mah = 0; |
1329 | di->bat_cap.mah = 0; |
1330 | changed = true; |
1331 | } else if (di->flags.fully_charged) { |
1332 | /* |
1333 | * We report 100% if algorithm reported fully charged |
1334 | * and show 100% during maintenance charging (scaling). |
1335 | */ |
1336 | if (di->flags.force_full) { |
1337 | di->bat_cap.prev_percent = percent; |
1338 | di->bat_cap.prev_mah = di->bat_cap.mah; |
1339 | |
1340 | changed = true; |
1341 | |
1342 | if (!di->bat_cap.cap_scale.enable && |
1343 | di->bm->capacity_scaling) { |
1344 | di->bat_cap.cap_scale.enable = true; |
1345 | di->bat_cap.cap_scale.cap_to_scale[0] = 100; |
1346 | di->bat_cap.cap_scale.cap_to_scale[1] = |
1347 | di->bat_cap.prev_percent; |
1348 | di->bat_cap.cap_scale.disable_cap_level = 100; |
1349 | } |
1350 | } else if (di->bat_cap.prev_percent != percent) { |
1351 | dev_dbg(di->dev, |
1352 | "battery reported full " |
1353 | "but capacity dropping: %d\n" , |
1354 | percent); |
1355 | di->bat_cap.prev_percent = percent; |
1356 | di->bat_cap.prev_mah = di->bat_cap.mah; |
1357 | |
1358 | changed = true; |
1359 | } |
1360 | } else if (di->bat_cap.prev_percent != percent) { |
1361 | if (percent == 0) { |
1362 | /* |
1363 | * We will not report 0% unless we've got |
1364 | * the LOW_BAT IRQ, no matter what the FG |
1365 | * algorithm says. |
1366 | */ |
1367 | di->bat_cap.prev_percent = 1; |
1368 | percent = 1; |
1369 | |
1370 | changed = true; |
1371 | } else if (!(!di->flags.charging && |
1372 | percent > di->bat_cap.prev_percent) || init) { |
1373 | /* |
1374 | * We do not allow reported capacity to go up |
1375 | * unless we're charging or if we're in init |
1376 | */ |
1377 | dev_dbg(di->dev, |
1378 | "capacity changed from %d to %d (%d)\n" , |
1379 | di->bat_cap.prev_percent, |
1380 | percent, |
1381 | di->bat_cap.permille); |
1382 | di->bat_cap.prev_percent = percent; |
1383 | di->bat_cap.prev_mah = di->bat_cap.mah; |
1384 | |
1385 | changed = true; |
1386 | } else { |
1387 | dev_dbg(di->dev, "capacity not allowed to go up since " |
1388 | "no charger is connected: %d to %d (%d)\n" , |
1389 | di->bat_cap.prev_percent, |
1390 | percent, |
1391 | di->bat_cap.permille); |
1392 | } |
1393 | } |
1394 | |
1395 | if (changed) { |
1396 | if (di->bm->capacity_scaling) { |
1397 | di->bat_cap.cap_scale.scaled_cap = |
1398 | ab8500_fg_calculate_scaled_capacity(di); |
1399 | |
1400 | dev_info(di->dev, "capacity=%d (%d)\n" , |
1401 | di->bat_cap.prev_percent, |
1402 | di->bat_cap.cap_scale.scaled_cap); |
1403 | } |
1404 | power_supply_changed(psy: di->fg_psy); |
1405 | if (di->flags.fully_charged && di->flags.force_full) { |
1406 | dev_dbg(di->dev, "Battery full, notifying.\n" ); |
1407 | di->flags.force_full = false; |
1408 | sysfs_notify(kobj: &di->fg_kobject, NULL, attr: "charge_full" ); |
1409 | } |
1410 | sysfs_notify(kobj: &di->fg_kobject, NULL, attr: "charge_now" ); |
1411 | } |
1412 | } |
1413 | |
1414 | static void ab8500_fg_charge_state_to(struct ab8500_fg *di, |
1415 | enum ab8500_fg_charge_state new_state) |
1416 | { |
1417 | dev_dbg(di->dev, "Charge state from %d [%s] to %d [%s]\n" , |
1418 | di->charge_state, |
1419 | charge_state[di->charge_state], |
1420 | new_state, |
1421 | charge_state[new_state]); |
1422 | |
1423 | di->charge_state = new_state; |
1424 | } |
1425 | |
1426 | static void ab8500_fg_discharge_state_to(struct ab8500_fg *di, |
1427 | enum ab8500_fg_discharge_state new_state) |
1428 | { |
1429 | dev_dbg(di->dev, "Discharge state from %d [%s] to %d [%s]\n" , |
1430 | di->discharge_state, |
1431 | discharge_state[di->discharge_state], |
1432 | new_state, |
1433 | discharge_state[new_state]); |
1434 | |
1435 | di->discharge_state = new_state; |
1436 | } |
1437 | |
1438 | /** |
1439 | * ab8500_fg_algorithm_charging() - FG algorithm for when charging |
1440 | * @di: pointer to the ab8500_fg structure |
1441 | * |
1442 | * Battery capacity calculation state machine for when we're charging |
1443 | */ |
1444 | static void ab8500_fg_algorithm_charging(struct ab8500_fg *di) |
1445 | { |
1446 | /* |
1447 | * If we change to discharge mode |
1448 | * we should start with recovery |
1449 | */ |
1450 | if (di->discharge_state != AB8500_FG_DISCHARGE_INIT_RECOVERY) |
1451 | ab8500_fg_discharge_state_to(di, |
1452 | new_state: AB8500_FG_DISCHARGE_INIT_RECOVERY); |
1453 | |
1454 | switch (di->charge_state) { |
1455 | case AB8500_FG_CHARGE_INIT: |
1456 | di->fg_samples = SEC_TO_SAMPLE( |
1457 | di->bm->fg_params->accu_charging); |
1458 | |
1459 | ab8500_fg_coulomb_counter(di, enable: true); |
1460 | ab8500_fg_charge_state_to(di, new_state: AB8500_FG_CHARGE_READOUT); |
1461 | |
1462 | break; |
1463 | |
1464 | case AB8500_FG_CHARGE_READOUT: |
1465 | /* |
1466 | * Read the FG and calculate the new capacity |
1467 | */ |
1468 | mutex_lock(&di->cc_lock); |
1469 | if (!di->flags.conv_done && !di->flags.force_full) { |
1470 | /* Wasn't the CC IRQ that got us here */ |
1471 | mutex_unlock(lock: &di->cc_lock); |
1472 | dev_dbg(di->dev, "%s CC conv not done\n" , |
1473 | __func__); |
1474 | |
1475 | break; |
1476 | } |
1477 | di->flags.conv_done = false; |
1478 | mutex_unlock(lock: &di->cc_lock); |
1479 | |
1480 | ab8500_fg_calc_cap_charging(di); |
1481 | |
1482 | break; |
1483 | |
1484 | default: |
1485 | break; |
1486 | } |
1487 | |
1488 | /* Check capacity limits */ |
1489 | ab8500_fg_check_capacity_limits(di, init: false); |
1490 | } |
1491 | |
1492 | static void force_capacity(struct ab8500_fg *di) |
1493 | { |
1494 | int cap; |
1495 | |
1496 | ab8500_fg_clear_cap_samples(di); |
1497 | cap = di->bat_cap.user_mah; |
1498 | if (cap > di->bat_cap.max_mah_design) { |
1499 | dev_dbg(di->dev, "Remaining cap %d can't be bigger than total" |
1500 | " %d\n" , cap, di->bat_cap.max_mah_design); |
1501 | cap = di->bat_cap.max_mah_design; |
1502 | } |
1503 | ab8500_fg_fill_cap_sample(di, sample: di->bat_cap.user_mah); |
1504 | di->bat_cap.permille = ab8500_fg_convert_mah_to_permille(di, cap_mah: cap); |
1505 | di->bat_cap.mah = cap; |
1506 | ab8500_fg_check_capacity_limits(di, init: true); |
1507 | } |
1508 | |
1509 | static bool check_sysfs_capacity(struct ab8500_fg *di) |
1510 | { |
1511 | int cap, lower, upper; |
1512 | int cap_permille; |
1513 | |
1514 | cap = di->bat_cap.user_mah; |
1515 | |
1516 | cap_permille = ab8500_fg_convert_mah_to_permille(di, |
1517 | cap_mah: di->bat_cap.user_mah); |
1518 | |
1519 | lower = di->bat_cap.permille - di->bm->fg_params->user_cap_limit * 10; |
1520 | upper = di->bat_cap.permille + di->bm->fg_params->user_cap_limit * 10; |
1521 | |
1522 | if (lower < 0) |
1523 | lower = 0; |
1524 | /* 1000 is permille, -> 100 percent */ |
1525 | if (upper > 1000) |
1526 | upper = 1000; |
1527 | |
1528 | dev_dbg(di->dev, "Capacity limits:" |
1529 | " (Lower: %d User: %d Upper: %d) [user: %d, was: %d]\n" , |
1530 | lower, cap_permille, upper, cap, di->bat_cap.mah); |
1531 | |
1532 | /* If within limits, use the saved capacity and exit estimation...*/ |
1533 | if (cap_permille > lower && cap_permille < upper) { |
1534 | dev_dbg(di->dev, "OK! Using users cap %d uAh now\n" , cap); |
1535 | force_capacity(di); |
1536 | return true; |
1537 | } |
1538 | dev_dbg(di->dev, "Capacity from user out of limits, ignoring" ); |
1539 | return false; |
1540 | } |
1541 | |
1542 | /** |
1543 | * ab8500_fg_algorithm_discharging() - FG algorithm for when discharging |
1544 | * @di: pointer to the ab8500_fg structure |
1545 | * |
1546 | * Battery capacity calculation state machine for when we're discharging |
1547 | */ |
1548 | static void ab8500_fg_algorithm_discharging(struct ab8500_fg *di) |
1549 | { |
1550 | int sleep_time; |
1551 | |
1552 | /* If we change to charge mode we should start with init */ |
1553 | if (di->charge_state != AB8500_FG_CHARGE_INIT) |
1554 | ab8500_fg_charge_state_to(di, new_state: AB8500_FG_CHARGE_INIT); |
1555 | |
1556 | switch (di->discharge_state) { |
1557 | case AB8500_FG_DISCHARGE_INIT: |
1558 | /* We use the FG IRQ to work on */ |
1559 | di->init_cnt = 0; |
1560 | di->fg_samples = SEC_TO_SAMPLE(di->bm->fg_params->init_timer); |
1561 | ab8500_fg_coulomb_counter(di, enable: true); |
1562 | ab8500_fg_discharge_state_to(di, |
1563 | new_state: AB8500_FG_DISCHARGE_INITMEASURING); |
1564 | |
1565 | fallthrough; |
1566 | case AB8500_FG_DISCHARGE_INITMEASURING: |
1567 | /* |
1568 | * Discard a number of samples during startup. |
1569 | * After that, use compensated voltage for a few |
1570 | * samples to get an initial capacity. |
1571 | * Then go to READOUT |
1572 | */ |
1573 | sleep_time = di->bm->fg_params->init_timer; |
1574 | |
1575 | /* Discard the first [x] seconds */ |
1576 | if (di->init_cnt > di->bm->fg_params->init_discard_time) { |
1577 | ab8500_fg_calc_cap_discharge_voltage(di); |
1578 | |
1579 | ab8500_fg_check_capacity_limits(di, init: true); |
1580 | } |
1581 | |
1582 | di->init_cnt += sleep_time; |
1583 | if (di->init_cnt > di->bm->fg_params->init_total_time) |
1584 | ab8500_fg_discharge_state_to(di, |
1585 | new_state: AB8500_FG_DISCHARGE_READOUT_INIT); |
1586 | |
1587 | break; |
1588 | |
1589 | case AB8500_FG_DISCHARGE_INIT_RECOVERY: |
1590 | di->recovery_cnt = 0; |
1591 | di->recovery_needed = true; |
1592 | ab8500_fg_discharge_state_to(di, |
1593 | new_state: AB8500_FG_DISCHARGE_RECOVERY); |
1594 | |
1595 | fallthrough; |
1596 | |
1597 | case AB8500_FG_DISCHARGE_RECOVERY: |
1598 | sleep_time = di->bm->fg_params->recovery_sleep_timer; |
1599 | |
1600 | /* |
1601 | * We should check the power consumption |
1602 | * If low, go to READOUT (after x min) or |
1603 | * RECOVERY_SLEEP if time left. |
1604 | * If high, go to READOUT |
1605 | */ |
1606 | di->inst_curr_ua = ab8500_fg_inst_curr_blocking(di); |
1607 | |
1608 | if (ab8500_fg_is_low_curr(di, curr_ua: di->inst_curr_ua)) { |
1609 | if (di->recovery_cnt > |
1610 | di->bm->fg_params->recovery_total_time) { |
1611 | di->fg_samples = SEC_TO_SAMPLE( |
1612 | di->bm->fg_params->accu_high_curr); |
1613 | ab8500_fg_coulomb_counter(di, enable: true); |
1614 | ab8500_fg_discharge_state_to(di, |
1615 | new_state: AB8500_FG_DISCHARGE_READOUT); |
1616 | di->recovery_needed = false; |
1617 | } else { |
1618 | queue_delayed_work(wq: di->fg_wq, |
1619 | dwork: &di->fg_periodic_work, |
1620 | delay: sleep_time * HZ); |
1621 | } |
1622 | di->recovery_cnt += sleep_time; |
1623 | } else { |
1624 | di->fg_samples = SEC_TO_SAMPLE( |
1625 | di->bm->fg_params->accu_high_curr); |
1626 | ab8500_fg_coulomb_counter(di, enable: true); |
1627 | ab8500_fg_discharge_state_to(di, |
1628 | new_state: AB8500_FG_DISCHARGE_READOUT); |
1629 | } |
1630 | break; |
1631 | |
1632 | case AB8500_FG_DISCHARGE_READOUT_INIT: |
1633 | di->fg_samples = SEC_TO_SAMPLE( |
1634 | di->bm->fg_params->accu_high_curr); |
1635 | ab8500_fg_coulomb_counter(di, enable: true); |
1636 | ab8500_fg_discharge_state_to(di, |
1637 | new_state: AB8500_FG_DISCHARGE_READOUT); |
1638 | break; |
1639 | |
1640 | case AB8500_FG_DISCHARGE_READOUT: |
1641 | di->inst_curr_ua = ab8500_fg_inst_curr_blocking(di); |
1642 | |
1643 | if (ab8500_fg_is_low_curr(di, curr_ua: di->inst_curr_ua)) { |
1644 | /* Detect mode change */ |
1645 | if (di->high_curr_mode) { |
1646 | di->high_curr_mode = false; |
1647 | di->high_curr_cnt = 0; |
1648 | } |
1649 | |
1650 | if (di->recovery_needed) { |
1651 | ab8500_fg_discharge_state_to(di, |
1652 | new_state: AB8500_FG_DISCHARGE_INIT_RECOVERY); |
1653 | |
1654 | queue_delayed_work(wq: di->fg_wq, |
1655 | dwork: &di->fg_periodic_work, delay: 0); |
1656 | |
1657 | break; |
1658 | } |
1659 | |
1660 | ab8500_fg_calc_cap_discharge_voltage(di); |
1661 | } else { |
1662 | mutex_lock(&di->cc_lock); |
1663 | if (!di->flags.conv_done) { |
1664 | /* Wasn't the CC IRQ that got us here */ |
1665 | mutex_unlock(lock: &di->cc_lock); |
1666 | dev_dbg(di->dev, "%s CC conv not done\n" , |
1667 | __func__); |
1668 | |
1669 | break; |
1670 | } |
1671 | di->flags.conv_done = false; |
1672 | mutex_unlock(lock: &di->cc_lock); |
1673 | |
1674 | /* Detect mode change */ |
1675 | if (!di->high_curr_mode) { |
1676 | di->high_curr_mode = true; |
1677 | di->high_curr_cnt = 0; |
1678 | } |
1679 | |
1680 | di->high_curr_cnt += |
1681 | di->bm->fg_params->accu_high_curr; |
1682 | if (di->high_curr_cnt > |
1683 | di->bm->fg_params->high_curr_time) |
1684 | di->recovery_needed = true; |
1685 | |
1686 | ab8500_fg_calc_cap_discharge_fg(di); |
1687 | } |
1688 | |
1689 | ab8500_fg_check_capacity_limits(di, init: false); |
1690 | |
1691 | break; |
1692 | |
1693 | case AB8500_FG_DISCHARGE_WAKEUP: |
1694 | ab8500_fg_calc_cap_discharge_voltage(di); |
1695 | |
1696 | di->fg_samples = SEC_TO_SAMPLE( |
1697 | di->bm->fg_params->accu_high_curr); |
1698 | ab8500_fg_coulomb_counter(di, enable: true); |
1699 | ab8500_fg_discharge_state_to(di, |
1700 | new_state: AB8500_FG_DISCHARGE_READOUT); |
1701 | |
1702 | ab8500_fg_check_capacity_limits(di, init: false); |
1703 | |
1704 | break; |
1705 | |
1706 | default: |
1707 | break; |
1708 | } |
1709 | } |
1710 | |
1711 | /** |
1712 | * ab8500_fg_algorithm_calibrate() - Internal columb counter offset calibration |
1713 | * @di: pointer to the ab8500_fg structure |
1714 | * |
1715 | */ |
1716 | static void ab8500_fg_algorithm_calibrate(struct ab8500_fg *di) |
1717 | { |
1718 | int ret; |
1719 | |
1720 | switch (di->calib_state) { |
1721 | case AB8500_FG_CALIB_INIT: |
1722 | dev_dbg(di->dev, "Calibration ongoing...\n" ); |
1723 | |
1724 | ret = abx500_mask_and_set_register_interruptible(dev: di->dev, |
1725 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, |
1726 | CC_INT_CAL_N_AVG_MASK, CC_INT_CAL_SAMPLES_8); |
1727 | if (ret < 0) |
1728 | goto err; |
1729 | |
1730 | ret = abx500_mask_and_set_register_interruptible(dev: di->dev, |
1731 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, |
1732 | CC_INTAVGOFFSET_ENA, CC_INTAVGOFFSET_ENA); |
1733 | if (ret < 0) |
1734 | goto err; |
1735 | di->calib_state = AB8500_FG_CALIB_WAIT; |
1736 | break; |
1737 | case AB8500_FG_CALIB_END: |
1738 | ret = abx500_mask_and_set_register_interruptible(dev: di->dev, |
1739 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, |
1740 | CC_MUXOFFSET, CC_MUXOFFSET); |
1741 | if (ret < 0) |
1742 | goto err; |
1743 | di->flags.calibrate = false; |
1744 | dev_dbg(di->dev, "Calibration done...\n" ); |
1745 | queue_delayed_work(wq: di->fg_wq, dwork: &di->fg_periodic_work, delay: 0); |
1746 | break; |
1747 | case AB8500_FG_CALIB_WAIT: |
1748 | dev_dbg(di->dev, "Calibration WFI\n" ); |
1749 | break; |
1750 | default: |
1751 | break; |
1752 | } |
1753 | return; |
1754 | err: |
1755 | /* Something went wrong, don't calibrate then */ |
1756 | dev_err(di->dev, "failed to calibrate the CC\n" ); |
1757 | di->flags.calibrate = false; |
1758 | di->calib_state = AB8500_FG_CALIB_INIT; |
1759 | queue_delayed_work(wq: di->fg_wq, dwork: &di->fg_periodic_work, delay: 0); |
1760 | } |
1761 | |
1762 | /** |
1763 | * ab8500_fg_algorithm() - Entry point for the FG algorithm |
1764 | * @di: pointer to the ab8500_fg structure |
1765 | * |
1766 | * Entry point for the battery capacity calculation state machine |
1767 | */ |
1768 | static void ab8500_fg_algorithm(struct ab8500_fg *di) |
1769 | { |
1770 | if (di->flags.calibrate) |
1771 | ab8500_fg_algorithm_calibrate(di); |
1772 | else { |
1773 | if (di->flags.charging) |
1774 | ab8500_fg_algorithm_charging(di); |
1775 | else |
1776 | ab8500_fg_algorithm_discharging(di); |
1777 | } |
1778 | |
1779 | dev_dbg(di->dev, "[FG_DATA] %d %d %d %d %d %d %d %d %d %d " |
1780 | "%d %d %d %d %d %d %d\n" , |
1781 | di->bat_cap.max_mah_design, |
1782 | di->bat_cap.max_mah, |
1783 | di->bat_cap.mah, |
1784 | di->bat_cap.permille, |
1785 | di->bat_cap.level, |
1786 | di->bat_cap.prev_mah, |
1787 | di->bat_cap.prev_percent, |
1788 | di->bat_cap.prev_level, |
1789 | di->vbat_uv, |
1790 | di->inst_curr_ua, |
1791 | di->avg_curr_ua, |
1792 | di->accu_charge, |
1793 | di->flags.charging, |
1794 | di->charge_state, |
1795 | di->discharge_state, |
1796 | di->high_curr_mode, |
1797 | di->recovery_needed); |
1798 | } |
1799 | |
1800 | /** |
1801 | * ab8500_fg_periodic_work() - Run the FG state machine periodically |
1802 | * @work: pointer to the work_struct structure |
1803 | * |
1804 | * Work queue function for periodic work |
1805 | */ |
1806 | static void ab8500_fg_periodic_work(struct work_struct *work) |
1807 | { |
1808 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, |
1809 | fg_periodic_work.work); |
1810 | |
1811 | if (di->init_capacity) { |
1812 | /* Get an initial capacity calculation */ |
1813 | ab8500_fg_calc_cap_discharge_voltage(di); |
1814 | ab8500_fg_check_capacity_limits(di, init: true); |
1815 | di->init_capacity = false; |
1816 | |
1817 | queue_delayed_work(wq: di->fg_wq, dwork: &di->fg_periodic_work, delay: 0); |
1818 | } else if (di->flags.user_cap) { |
1819 | if (check_sysfs_capacity(di)) { |
1820 | ab8500_fg_check_capacity_limits(di, init: true); |
1821 | if (di->flags.charging) |
1822 | ab8500_fg_charge_state_to(di, |
1823 | new_state: AB8500_FG_CHARGE_INIT); |
1824 | else |
1825 | ab8500_fg_discharge_state_to(di, |
1826 | new_state: AB8500_FG_DISCHARGE_READOUT_INIT); |
1827 | } |
1828 | di->flags.user_cap = false; |
1829 | queue_delayed_work(wq: di->fg_wq, dwork: &di->fg_periodic_work, delay: 0); |
1830 | } else |
1831 | ab8500_fg_algorithm(di); |
1832 | |
1833 | } |
1834 | |
1835 | /** |
1836 | * ab8500_fg_check_hw_failure_work() - Check OVV_BAT condition |
1837 | * @work: pointer to the work_struct structure |
1838 | * |
1839 | * Work queue function for checking the OVV_BAT condition |
1840 | */ |
1841 | static void ab8500_fg_check_hw_failure_work(struct work_struct *work) |
1842 | { |
1843 | int ret; |
1844 | u8 reg_value; |
1845 | |
1846 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, |
1847 | fg_check_hw_failure_work.work); |
1848 | |
1849 | /* |
1850 | * If we have had a battery over-voltage situation, |
1851 | * check ovv-bit to see if it should be reset. |
1852 | */ |
1853 | ret = abx500_get_register_interruptible(dev: di->dev, |
1854 | AB8500_CHARGER, AB8500_CH_STAT_REG, |
1855 | value: ®_value); |
1856 | if (ret < 0) { |
1857 | dev_err(di->dev, "%s ab8500 read failed\n" , __func__); |
1858 | return; |
1859 | } |
1860 | if ((reg_value & BATT_OVV) == BATT_OVV) { |
1861 | if (!di->flags.bat_ovv) { |
1862 | dev_dbg(di->dev, "Battery OVV\n" ); |
1863 | di->flags.bat_ovv = true; |
1864 | power_supply_changed(psy: di->fg_psy); |
1865 | } |
1866 | /* Not yet recovered from ovv, reschedule this test */ |
1867 | queue_delayed_work(wq: di->fg_wq, dwork: &di->fg_check_hw_failure_work, |
1868 | HZ); |
1869 | } else { |
1870 | dev_dbg(di->dev, "Battery recovered from OVV\n" ); |
1871 | di->flags.bat_ovv = false; |
1872 | power_supply_changed(psy: di->fg_psy); |
1873 | } |
1874 | } |
1875 | |
1876 | /** |
1877 | * ab8500_fg_low_bat_work() - Check LOW_BAT condition |
1878 | * @work: pointer to the work_struct structure |
1879 | * |
1880 | * Work queue function for checking the LOW_BAT condition |
1881 | */ |
1882 | static void ab8500_fg_low_bat_work(struct work_struct *work) |
1883 | { |
1884 | int vbat_uv; |
1885 | |
1886 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, |
1887 | fg_low_bat_work.work); |
1888 | |
1889 | vbat_uv = ab8500_fg_bat_voltage(di); |
1890 | |
1891 | /* Check if LOW_BAT still fulfilled */ |
1892 | if (vbat_uv < di->bm->fg_params->lowbat_threshold_uv) { |
1893 | /* Is it time to shut down? */ |
1894 | if (di->low_bat_cnt < 1) { |
1895 | di->flags.low_bat = true; |
1896 | dev_warn(di->dev, "Shut down pending...\n" ); |
1897 | } else { |
1898 | /* |
1899 | * Else we need to re-schedule this check to be able to detect |
1900 | * if the voltage increases again during charging or |
1901 | * due to decreasing load. |
1902 | */ |
1903 | di->low_bat_cnt--; |
1904 | dev_warn(di->dev, "Battery voltage still LOW\n" ); |
1905 | queue_delayed_work(wq: di->fg_wq, dwork: &di->fg_low_bat_work, |
1906 | delay: round_jiffies(LOW_BAT_CHECK_INTERVAL)); |
1907 | } |
1908 | } else { |
1909 | di->flags.low_bat_delay = false; |
1910 | di->low_bat_cnt = 10; |
1911 | dev_warn(di->dev, "Battery voltage OK again\n" ); |
1912 | } |
1913 | |
1914 | /* This is needed to dispatch LOW_BAT */ |
1915 | ab8500_fg_check_capacity_limits(di, init: false); |
1916 | } |
1917 | |
1918 | /** |
1919 | * ab8500_fg_battok_calc - calculate the bit pattern corresponding |
1920 | * to the target voltage. |
1921 | * @di: pointer to the ab8500_fg structure |
1922 | * @target: target voltage |
1923 | * |
1924 | * Returns bit pattern closest to the target voltage |
1925 | * valid return values are 0-14. (0-BATT_OK_MAX_NR_INCREMENTS) |
1926 | */ |
1927 | |
1928 | static int ab8500_fg_battok_calc(struct ab8500_fg *di, int target) |
1929 | { |
1930 | if (target > BATT_OK_MIN + |
1931 | (BATT_OK_INCREMENT * BATT_OK_MAX_NR_INCREMENTS)) |
1932 | return BATT_OK_MAX_NR_INCREMENTS; |
1933 | if (target < BATT_OK_MIN) |
1934 | return 0; |
1935 | return (target - BATT_OK_MIN) / BATT_OK_INCREMENT; |
1936 | } |
1937 | |
1938 | /** |
1939 | * ab8500_fg_battok_init_hw_register - init battok levels |
1940 | * @di: pointer to the ab8500_fg structure |
1941 | * |
1942 | */ |
1943 | |
1944 | static int ab8500_fg_battok_init_hw_register(struct ab8500_fg *di) |
1945 | { |
1946 | int selected; |
1947 | int sel0; |
1948 | int sel1; |
1949 | int cbp_sel0; |
1950 | int cbp_sel1; |
1951 | int ret; |
1952 | int new_val; |
1953 | |
1954 | sel0 = di->bm->fg_params->battok_falling_th_sel0; |
1955 | sel1 = di->bm->fg_params->battok_raising_th_sel1; |
1956 | |
1957 | cbp_sel0 = ab8500_fg_battok_calc(di, target: sel0); |
1958 | cbp_sel1 = ab8500_fg_battok_calc(di, target: sel1); |
1959 | |
1960 | selected = BATT_OK_MIN + cbp_sel0 * BATT_OK_INCREMENT; |
1961 | |
1962 | if (selected != sel0) |
1963 | dev_warn(di->dev, "Invalid voltage step:%d, using %d %d\n" , |
1964 | sel0, selected, cbp_sel0); |
1965 | |
1966 | selected = BATT_OK_MIN + cbp_sel1 * BATT_OK_INCREMENT; |
1967 | |
1968 | if (selected != sel1) |
1969 | dev_warn(di->dev, "Invalid voltage step:%d, using %d %d\n" , |
1970 | sel1, selected, cbp_sel1); |
1971 | |
1972 | new_val = cbp_sel0 | (cbp_sel1 << 4); |
1973 | |
1974 | dev_dbg(di->dev, "using: %x %d %d\n" , new_val, cbp_sel0, cbp_sel1); |
1975 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_SYS_CTRL2_BLOCK, |
1976 | AB8500_BATT_OK_REG, value: new_val); |
1977 | return ret; |
1978 | } |
1979 | |
1980 | /** |
1981 | * ab8500_fg_instant_work() - Run the FG state machine instantly |
1982 | * @work: pointer to the work_struct structure |
1983 | * |
1984 | * Work queue function for instant work |
1985 | */ |
1986 | static void ab8500_fg_instant_work(struct work_struct *work) |
1987 | { |
1988 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, fg_work); |
1989 | |
1990 | ab8500_fg_algorithm(di); |
1991 | } |
1992 | |
1993 | /** |
1994 | * ab8500_fg_cc_data_end_handler() - end of data conversion isr. |
1995 | * @irq: interrupt number |
1996 | * @_di: pointer to the ab8500_fg structure |
1997 | * |
1998 | * Returns IRQ status(IRQ_HANDLED) |
1999 | */ |
2000 | static irqreturn_t ab8500_fg_cc_data_end_handler(int irq, void *_di) |
2001 | { |
2002 | struct ab8500_fg *di = _di; |
2003 | if (!di->nbr_cceoc_irq_cnt) { |
2004 | di->nbr_cceoc_irq_cnt++; |
2005 | complete(&di->ab8500_fg_started); |
2006 | } else { |
2007 | di->nbr_cceoc_irq_cnt = 0; |
2008 | complete(&di->ab8500_fg_complete); |
2009 | } |
2010 | return IRQ_HANDLED; |
2011 | } |
2012 | |
2013 | /** |
2014 | * ab8500_fg_cc_int_calib_handler () - end of calibration isr. |
2015 | * @irq: interrupt number |
2016 | * @_di: pointer to the ab8500_fg structure |
2017 | * |
2018 | * Returns IRQ status(IRQ_HANDLED) |
2019 | */ |
2020 | static irqreturn_t ab8500_fg_cc_int_calib_handler(int irq, void *_di) |
2021 | { |
2022 | struct ab8500_fg *di = _di; |
2023 | di->calib_state = AB8500_FG_CALIB_END; |
2024 | queue_delayed_work(wq: di->fg_wq, dwork: &di->fg_periodic_work, delay: 0); |
2025 | return IRQ_HANDLED; |
2026 | } |
2027 | |
2028 | /** |
2029 | * ab8500_fg_cc_convend_handler() - isr to get battery avg current. |
2030 | * @irq: interrupt number |
2031 | * @_di: pointer to the ab8500_fg structure |
2032 | * |
2033 | * Returns IRQ status(IRQ_HANDLED) |
2034 | */ |
2035 | static irqreturn_t ab8500_fg_cc_convend_handler(int irq, void *_di) |
2036 | { |
2037 | struct ab8500_fg *di = _di; |
2038 | |
2039 | queue_work(wq: di->fg_wq, work: &di->fg_acc_cur_work); |
2040 | |
2041 | return IRQ_HANDLED; |
2042 | } |
2043 | |
2044 | /** |
2045 | * ab8500_fg_batt_ovv_handler() - Battery OVV occured |
2046 | * @irq: interrupt number |
2047 | * @_di: pointer to the ab8500_fg structure |
2048 | * |
2049 | * Returns IRQ status(IRQ_HANDLED) |
2050 | */ |
2051 | static irqreturn_t ab8500_fg_batt_ovv_handler(int irq, void *_di) |
2052 | { |
2053 | struct ab8500_fg *di = _di; |
2054 | |
2055 | dev_dbg(di->dev, "Battery OVV\n" ); |
2056 | |
2057 | /* Schedule a new HW failure check */ |
2058 | queue_delayed_work(wq: di->fg_wq, dwork: &di->fg_check_hw_failure_work, delay: 0); |
2059 | |
2060 | return IRQ_HANDLED; |
2061 | } |
2062 | |
2063 | /** |
2064 | * ab8500_fg_lowbatf_handler() - Battery voltage is below LOW threshold |
2065 | * @irq: interrupt number |
2066 | * @_di: pointer to the ab8500_fg structure |
2067 | * |
2068 | * Returns IRQ status(IRQ_HANDLED) |
2069 | */ |
2070 | static irqreturn_t ab8500_fg_lowbatf_handler(int irq, void *_di) |
2071 | { |
2072 | struct ab8500_fg *di = _di; |
2073 | |
2074 | /* Initiate handling in ab8500_fg_low_bat_work() if not already initiated. */ |
2075 | if (!di->flags.low_bat_delay) { |
2076 | dev_warn(di->dev, "Battery voltage is below LOW threshold\n" ); |
2077 | di->flags.low_bat_delay = true; |
2078 | /* |
2079 | * Start a timer to check LOW_BAT again after some time |
2080 | * This is done to avoid shutdown on single voltage dips |
2081 | */ |
2082 | queue_delayed_work(wq: di->fg_wq, dwork: &di->fg_low_bat_work, |
2083 | delay: round_jiffies(LOW_BAT_CHECK_INTERVAL)); |
2084 | } |
2085 | return IRQ_HANDLED; |
2086 | } |
2087 | |
2088 | /** |
2089 | * ab8500_fg_get_property() - get the fg properties |
2090 | * @psy: pointer to the power_supply structure |
2091 | * @psp: pointer to the power_supply_property structure |
2092 | * @val: pointer to the power_supply_propval union |
2093 | * |
2094 | * This function gets called when an application tries to get the |
2095 | * fg properties by reading the sysfs files. |
2096 | * voltage_now: battery voltage |
2097 | * current_now: battery instant current |
2098 | * current_avg: battery average current |
2099 | * charge_full_design: capacity where battery is considered full |
2100 | * charge_now: battery capacity in nAh |
2101 | * capacity: capacity in percent |
2102 | * capacity_level: capacity level |
2103 | * |
2104 | * Returns error code in case of failure else 0 on success |
2105 | */ |
2106 | static int ab8500_fg_get_property(struct power_supply *psy, |
2107 | enum power_supply_property psp, |
2108 | union power_supply_propval *val) |
2109 | { |
2110 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
2111 | |
2112 | /* |
2113 | * If battery is identified as unknown and charging of unknown |
2114 | * batteries is disabled, we always report 100% capacity and |
2115 | * capacity level UNKNOWN, since we can't calculate |
2116 | * remaining capacity |
2117 | */ |
2118 | |
2119 | switch (psp) { |
2120 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
2121 | if (di->flags.bat_ovv) |
2122 | val->intval = BATT_OVV_VALUE; |
2123 | else |
2124 | val->intval = di->vbat_uv; |
2125 | break; |
2126 | case POWER_SUPPLY_PROP_CURRENT_NOW: |
2127 | val->intval = di->inst_curr_ua; |
2128 | break; |
2129 | case POWER_SUPPLY_PROP_CURRENT_AVG: |
2130 | val->intval = di->avg_curr_ua; |
2131 | break; |
2132 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: |
2133 | val->intval = ab8500_fg_convert_mah_to_uwh(di, |
2134 | cap_mah: di->bat_cap.max_mah_design); |
2135 | break; |
2136 | case POWER_SUPPLY_PROP_ENERGY_FULL: |
2137 | val->intval = ab8500_fg_convert_mah_to_uwh(di, |
2138 | cap_mah: di->bat_cap.max_mah); |
2139 | break; |
2140 | case POWER_SUPPLY_PROP_ENERGY_NOW: |
2141 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
2142 | di->flags.batt_id_received) |
2143 | val->intval = ab8500_fg_convert_mah_to_uwh(di, |
2144 | cap_mah: di->bat_cap.max_mah); |
2145 | else |
2146 | val->intval = ab8500_fg_convert_mah_to_uwh(di, |
2147 | cap_mah: di->bat_cap.prev_mah); |
2148 | break; |
2149 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
2150 | val->intval = di->bat_cap.max_mah_design; |
2151 | break; |
2152 | case POWER_SUPPLY_PROP_CHARGE_FULL: |
2153 | val->intval = di->bat_cap.max_mah; |
2154 | break; |
2155 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
2156 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
2157 | di->flags.batt_id_received) |
2158 | val->intval = di->bat_cap.max_mah; |
2159 | else |
2160 | val->intval = di->bat_cap.prev_mah; |
2161 | break; |
2162 | case POWER_SUPPLY_PROP_CAPACITY: |
2163 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
2164 | di->flags.batt_id_received) |
2165 | val->intval = 100; |
2166 | else |
2167 | val->intval = di->bat_cap.prev_percent; |
2168 | break; |
2169 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
2170 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
2171 | di->flags.batt_id_received) |
2172 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN; |
2173 | else |
2174 | val->intval = di->bat_cap.prev_level; |
2175 | break; |
2176 | default: |
2177 | return -EINVAL; |
2178 | } |
2179 | return 0; |
2180 | } |
2181 | |
2182 | static int ab8500_fg_get_ext_psy_data(struct device *dev, void *data) |
2183 | { |
2184 | struct power_supply *psy; |
2185 | struct power_supply *ext = dev_get_drvdata(dev); |
2186 | const char **supplicants = (const char **)ext->supplied_to; |
2187 | struct ab8500_fg *di; |
2188 | struct power_supply_battery_info *bi; |
2189 | union power_supply_propval ret; |
2190 | int j; |
2191 | |
2192 | psy = (struct power_supply *)data; |
2193 | di = power_supply_get_drvdata(psy); |
2194 | bi = di->bm->bi; |
2195 | |
2196 | /* |
2197 | * For all psy where the name of your driver |
2198 | * appears in any supplied_to |
2199 | */ |
2200 | j = match_string(array: supplicants, n: ext->num_supplicants, string: psy->desc->name); |
2201 | if (j < 0) |
2202 | return 0; |
2203 | |
2204 | /* Go through all properties for the psy */ |
2205 | for (j = 0; j < ext->desc->num_properties; j++) { |
2206 | enum power_supply_property prop; |
2207 | prop = ext->desc->properties[j]; |
2208 | |
2209 | if (power_supply_get_property(psy: ext, psp: prop, val: &ret)) |
2210 | continue; |
2211 | |
2212 | switch (prop) { |
2213 | case POWER_SUPPLY_PROP_STATUS: |
2214 | switch (ext->desc->type) { |
2215 | case POWER_SUPPLY_TYPE_BATTERY: |
2216 | switch (ret.intval) { |
2217 | case POWER_SUPPLY_STATUS_UNKNOWN: |
2218 | case POWER_SUPPLY_STATUS_DISCHARGING: |
2219 | case POWER_SUPPLY_STATUS_NOT_CHARGING: |
2220 | if (!di->flags.charging) |
2221 | break; |
2222 | di->flags.charging = false; |
2223 | di->flags.fully_charged = false; |
2224 | if (di->bm->capacity_scaling) |
2225 | ab8500_fg_update_cap_scalers(di); |
2226 | queue_work(wq: di->fg_wq, work: &di->fg_work); |
2227 | break; |
2228 | case POWER_SUPPLY_STATUS_FULL: |
2229 | if (di->flags.fully_charged) |
2230 | break; |
2231 | di->flags.fully_charged = true; |
2232 | di->flags.force_full = true; |
2233 | /* Save current capacity as maximum */ |
2234 | di->bat_cap.max_mah = di->bat_cap.mah; |
2235 | queue_work(wq: di->fg_wq, work: &di->fg_work); |
2236 | break; |
2237 | case POWER_SUPPLY_STATUS_CHARGING: |
2238 | if (di->flags.charging && |
2239 | !di->flags.fully_charged) |
2240 | break; |
2241 | di->flags.charging = true; |
2242 | di->flags.fully_charged = false; |
2243 | if (di->bm->capacity_scaling) |
2244 | ab8500_fg_update_cap_scalers(di); |
2245 | queue_work(wq: di->fg_wq, work: &di->fg_work); |
2246 | break; |
2247 | } |
2248 | break; |
2249 | default: |
2250 | break; |
2251 | } |
2252 | break; |
2253 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
2254 | switch (ext->desc->type) { |
2255 | case POWER_SUPPLY_TYPE_BATTERY: |
2256 | if (!di->flags.batt_id_received && |
2257 | (bi && (bi->technology != |
2258 | POWER_SUPPLY_TECHNOLOGY_UNKNOWN))) { |
2259 | di->flags.batt_id_received = true; |
2260 | |
2261 | di->bat_cap.max_mah_design = |
2262 | di->bm->bi->charge_full_design_uah; |
2263 | |
2264 | di->bat_cap.max_mah = |
2265 | di->bat_cap.max_mah_design; |
2266 | |
2267 | di->vbat_nom_uv = |
2268 | di->bm->bi->voltage_max_design_uv; |
2269 | } |
2270 | |
2271 | if (ret.intval) |
2272 | di->flags.batt_unknown = false; |
2273 | else |
2274 | di->flags.batt_unknown = true; |
2275 | break; |
2276 | default: |
2277 | break; |
2278 | } |
2279 | break; |
2280 | case POWER_SUPPLY_PROP_TEMP: |
2281 | switch (ext->desc->type) { |
2282 | case POWER_SUPPLY_TYPE_BATTERY: |
2283 | if (di->flags.batt_id_received) |
2284 | di->bat_temp = ret.intval; |
2285 | break; |
2286 | default: |
2287 | break; |
2288 | } |
2289 | break; |
2290 | default: |
2291 | break; |
2292 | } |
2293 | } |
2294 | return 0; |
2295 | } |
2296 | |
2297 | /** |
2298 | * ab8500_fg_init_hw_registers() - Set up FG related registers |
2299 | * @di: pointer to the ab8500_fg structure |
2300 | * |
2301 | * Set up battery OVV, low battery voltage registers |
2302 | */ |
2303 | static int ab8500_fg_init_hw_registers(struct ab8500_fg *di) |
2304 | { |
2305 | int ret; |
2306 | |
2307 | /* |
2308 | * Set VBAT OVV (overvoltage) threshold to 4.75V (typ) this is what |
2309 | * the hardware supports, nothing else can be configured in hardware. |
2310 | * See this as an "outer limit" where the charger will certainly |
2311 | * shut down. Other (lower) overvoltage levels need to be implemented |
2312 | * in software. |
2313 | */ |
2314 | ret = abx500_mask_and_set_register_interruptible(dev: di->dev, |
2315 | AB8500_CHARGER, |
2316 | AB8500_BATT_OVV, |
2317 | BATT_OVV_TH_4P75, |
2318 | BATT_OVV_TH_4P75); |
2319 | if (ret) { |
2320 | dev_err(di->dev, "failed to set BATT_OVV\n" ); |
2321 | goto out; |
2322 | } |
2323 | |
2324 | /* Enable VBAT OVV detection */ |
2325 | ret = abx500_mask_and_set_register_interruptible(dev: di->dev, |
2326 | AB8500_CHARGER, |
2327 | AB8500_BATT_OVV, |
2328 | BATT_OVV_ENA, |
2329 | BATT_OVV_ENA); |
2330 | if (ret) { |
2331 | dev_err(di->dev, "failed to enable BATT_OVV\n" ); |
2332 | goto out; |
2333 | } |
2334 | |
2335 | /* Low Battery Voltage */ |
2336 | ret = abx500_set_register_interruptible(dev: di->dev, |
2337 | AB8500_SYS_CTRL2_BLOCK, |
2338 | AB8500_LOW_BAT_REG, |
2339 | value: ab8500_volt_to_regval( |
2340 | voltage_uv: di->bm->fg_params->lowbat_threshold_uv) << 1 | |
2341 | LOW_BAT_ENABLE); |
2342 | if (ret) { |
2343 | dev_err(di->dev, "%s write failed\n" , __func__); |
2344 | goto out; |
2345 | } |
2346 | |
2347 | /* Battery OK threshold */ |
2348 | ret = ab8500_fg_battok_init_hw_register(di); |
2349 | if (ret) { |
2350 | dev_err(di->dev, "BattOk init write failed.\n" ); |
2351 | goto out; |
2352 | } |
2353 | |
2354 | if (is_ab8505(ab: di->parent)) { |
2355 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_RTC, |
2356 | AB8505_RTC_PCUT_MAX_TIME_REG, value: di->bm->fg_params->pcut_max_time); |
2357 | |
2358 | if (ret) { |
2359 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_MAX_TIME_REG\n" , __func__); |
2360 | goto out; |
2361 | } |
2362 | |
2363 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_RTC, |
2364 | AB8505_RTC_PCUT_FLAG_TIME_REG, value: di->bm->fg_params->pcut_flag_time); |
2365 | |
2366 | if (ret) { |
2367 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_FLAG_TIME_REG\n" , __func__); |
2368 | goto out; |
2369 | } |
2370 | |
2371 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_RTC, |
2372 | AB8505_RTC_PCUT_RESTART_REG, value: di->bm->fg_params->pcut_max_restart); |
2373 | |
2374 | if (ret) { |
2375 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_RESTART_REG\n" , __func__); |
2376 | goto out; |
2377 | } |
2378 | |
2379 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_RTC, |
2380 | AB8505_RTC_PCUT_DEBOUNCE_REG, value: di->bm->fg_params->pcut_debounce_time); |
2381 | |
2382 | if (ret) { |
2383 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_DEBOUNCE_REG\n" , __func__); |
2384 | goto out; |
2385 | } |
2386 | |
2387 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_RTC, |
2388 | AB8505_RTC_PCUT_CTL_STATUS_REG, value: di->bm->fg_params->pcut_enable); |
2389 | |
2390 | if (ret) { |
2391 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_CTL_STATUS_REG\n" , __func__); |
2392 | goto out; |
2393 | } |
2394 | } |
2395 | out: |
2396 | return ret; |
2397 | } |
2398 | |
2399 | /** |
2400 | * ab8500_fg_external_power_changed() - callback for power supply changes |
2401 | * @psy: pointer to the structure power_supply |
2402 | * |
2403 | * This function is the entry point of the pointer external_power_changed |
2404 | * of the structure power_supply. |
2405 | * This function gets executed when there is a change in any external power |
2406 | * supply that this driver needs to be notified of. |
2407 | */ |
2408 | static void ab8500_fg_external_power_changed(struct power_supply *psy) |
2409 | { |
2410 | class_for_each_device(class: power_supply_class, NULL, data: psy, |
2411 | fn: ab8500_fg_get_ext_psy_data); |
2412 | } |
2413 | |
2414 | /** |
2415 | * ab8500_fg_reinit_work() - work to reset the FG algorithm |
2416 | * @work: pointer to the work_struct structure |
2417 | * |
2418 | * Used to reset the current battery capacity to be able to |
2419 | * retrigger a new voltage base capacity calculation. For |
2420 | * test and verification purpose. |
2421 | */ |
2422 | static void ab8500_fg_reinit_work(struct work_struct *work) |
2423 | { |
2424 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, |
2425 | fg_reinit_work.work); |
2426 | |
2427 | if (!di->flags.calibrate) { |
2428 | dev_dbg(di->dev, "Resetting FG state machine to init.\n" ); |
2429 | ab8500_fg_clear_cap_samples(di); |
2430 | ab8500_fg_calc_cap_discharge_voltage(di); |
2431 | ab8500_fg_charge_state_to(di, new_state: AB8500_FG_CHARGE_INIT); |
2432 | ab8500_fg_discharge_state_to(di, new_state: AB8500_FG_DISCHARGE_INIT); |
2433 | queue_delayed_work(wq: di->fg_wq, dwork: &di->fg_periodic_work, delay: 0); |
2434 | |
2435 | } else { |
2436 | dev_err(di->dev, "Residual offset calibration ongoing " |
2437 | "retrying..\n" ); |
2438 | /* Wait one second until next try*/ |
2439 | queue_delayed_work(wq: di->fg_wq, dwork: &di->fg_reinit_work, |
2440 | delay: round_jiffies(j: 1)); |
2441 | } |
2442 | } |
2443 | |
2444 | /* Exposure to the sysfs interface */ |
2445 | |
2446 | struct ab8500_fg_sysfs_entry { |
2447 | struct attribute attr; |
2448 | ssize_t (*show)(struct ab8500_fg *, char *); |
2449 | ssize_t (*store)(struct ab8500_fg *, const char *, size_t); |
2450 | }; |
2451 | |
2452 | static ssize_t charge_full_show(struct ab8500_fg *di, char *buf) |
2453 | { |
2454 | return sysfs_emit(buf, fmt: "%d\n" , di->bat_cap.max_mah); |
2455 | } |
2456 | |
2457 | static ssize_t charge_full_store(struct ab8500_fg *di, const char *buf, |
2458 | size_t count) |
2459 | { |
2460 | unsigned long charge_full; |
2461 | int ret; |
2462 | |
2463 | ret = kstrtoul(s: buf, base: 10, res: &charge_full); |
2464 | if (ret) |
2465 | return ret; |
2466 | |
2467 | di->bat_cap.max_mah = (int) charge_full; |
2468 | return count; |
2469 | } |
2470 | |
2471 | static ssize_t charge_now_show(struct ab8500_fg *di, char *buf) |
2472 | { |
2473 | return sysfs_emit(buf, fmt: "%d\n" , di->bat_cap.prev_mah); |
2474 | } |
2475 | |
2476 | static ssize_t charge_now_store(struct ab8500_fg *di, const char *buf, |
2477 | size_t count) |
2478 | { |
2479 | unsigned long charge_now; |
2480 | int ret; |
2481 | |
2482 | ret = kstrtoul(s: buf, base: 10, res: &charge_now); |
2483 | if (ret) |
2484 | return ret; |
2485 | |
2486 | di->bat_cap.user_mah = (int) charge_now; |
2487 | di->flags.user_cap = true; |
2488 | queue_delayed_work(wq: di->fg_wq, dwork: &di->fg_periodic_work, delay: 0); |
2489 | return count; |
2490 | } |
2491 | |
2492 | static struct ab8500_fg_sysfs_entry charge_full_attr = |
2493 | __ATTR(charge_full, 0644, charge_full_show, charge_full_store); |
2494 | |
2495 | static struct ab8500_fg_sysfs_entry charge_now_attr = |
2496 | __ATTR(charge_now, 0644, charge_now_show, charge_now_store); |
2497 | |
2498 | static ssize_t |
2499 | ab8500_fg_show(struct kobject *kobj, struct attribute *attr, char *buf) |
2500 | { |
2501 | struct ab8500_fg_sysfs_entry *entry; |
2502 | struct ab8500_fg *di; |
2503 | |
2504 | entry = container_of(attr, struct ab8500_fg_sysfs_entry, attr); |
2505 | di = container_of(kobj, struct ab8500_fg, fg_kobject); |
2506 | |
2507 | if (!entry->show) |
2508 | return -EIO; |
2509 | |
2510 | return entry->show(di, buf); |
2511 | } |
2512 | static ssize_t |
2513 | ab8500_fg_store(struct kobject *kobj, struct attribute *attr, const char *buf, |
2514 | size_t count) |
2515 | { |
2516 | struct ab8500_fg_sysfs_entry *entry; |
2517 | struct ab8500_fg *di; |
2518 | |
2519 | entry = container_of(attr, struct ab8500_fg_sysfs_entry, attr); |
2520 | di = container_of(kobj, struct ab8500_fg, fg_kobject); |
2521 | |
2522 | if (!entry->store) |
2523 | return -EIO; |
2524 | |
2525 | return entry->store(di, buf, count); |
2526 | } |
2527 | |
2528 | static const struct sysfs_ops ab8500_fg_sysfs_ops = { |
2529 | .show = ab8500_fg_show, |
2530 | .store = ab8500_fg_store, |
2531 | }; |
2532 | |
2533 | static struct attribute *ab8500_fg_attrs[] = { |
2534 | &charge_full_attr.attr, |
2535 | &charge_now_attr.attr, |
2536 | NULL, |
2537 | }; |
2538 | ATTRIBUTE_GROUPS(ab8500_fg); |
2539 | |
2540 | static struct kobj_type ab8500_fg_ktype = { |
2541 | .sysfs_ops = &ab8500_fg_sysfs_ops, |
2542 | .default_groups = ab8500_fg_groups, |
2543 | }; |
2544 | |
2545 | /** |
2546 | * ab8500_fg_sysfs_exit() - de-init of sysfs entry |
2547 | * @di: pointer to the struct ab8500_chargalg |
2548 | * |
2549 | * This function removes the entry in sysfs. |
2550 | */ |
2551 | static void ab8500_fg_sysfs_exit(struct ab8500_fg *di) |
2552 | { |
2553 | kobject_del(kobj: &di->fg_kobject); |
2554 | } |
2555 | |
2556 | /** |
2557 | * ab8500_fg_sysfs_init() - init of sysfs entry |
2558 | * @di: pointer to the struct ab8500_chargalg |
2559 | * |
2560 | * This function adds an entry in sysfs. |
2561 | * Returns error code in case of failure else 0(on success) |
2562 | */ |
2563 | static int ab8500_fg_sysfs_init(struct ab8500_fg *di) |
2564 | { |
2565 | int ret = 0; |
2566 | |
2567 | ret = kobject_init_and_add(kobj: &di->fg_kobject, |
2568 | ktype: &ab8500_fg_ktype, |
2569 | NULL, fmt: "battery" ); |
2570 | if (ret < 0) { |
2571 | kobject_put(kobj: &di->fg_kobject); |
2572 | dev_err(di->dev, "failed to create sysfs entry\n" ); |
2573 | } |
2574 | |
2575 | return ret; |
2576 | } |
2577 | |
2578 | static ssize_t ab8505_powercut_flagtime_read(struct device *dev, |
2579 | struct device_attribute *attr, |
2580 | char *buf) |
2581 | { |
2582 | int ret; |
2583 | u8 reg_value; |
2584 | struct power_supply *psy = dev_get_drvdata(dev); |
2585 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
2586 | |
2587 | ret = abx500_get_register_interruptible(dev: di->dev, AB8500_RTC, |
2588 | AB8505_RTC_PCUT_FLAG_TIME_REG, value: ®_value); |
2589 | |
2590 | if (ret < 0) { |
2591 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_FLAG_TIME_REG\n" ); |
2592 | goto fail; |
2593 | } |
2594 | |
2595 | return sysfs_emit(buf, fmt: "%d\n" , (reg_value & 0x7F)); |
2596 | |
2597 | fail: |
2598 | return ret; |
2599 | } |
2600 | |
2601 | static ssize_t ab8505_powercut_flagtime_write(struct device *dev, |
2602 | struct device_attribute *attr, |
2603 | const char *buf, size_t count) |
2604 | { |
2605 | int ret; |
2606 | int reg_value; |
2607 | struct power_supply *psy = dev_get_drvdata(dev); |
2608 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
2609 | |
2610 | if (kstrtoint(s: buf, base: 10, res: ®_value)) |
2611 | goto fail; |
2612 | |
2613 | if (reg_value > 0x7F) { |
2614 | dev_err(dev, "Incorrect parameter, echo 0 (1.98s) - 127 (15.625ms) for flagtime\n" ); |
2615 | goto fail; |
2616 | } |
2617 | |
2618 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_RTC, |
2619 | AB8505_RTC_PCUT_FLAG_TIME_REG, value: (u8)reg_value); |
2620 | |
2621 | if (ret < 0) |
2622 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_FLAG_TIME_REG\n" ); |
2623 | |
2624 | fail: |
2625 | return count; |
2626 | } |
2627 | |
2628 | static ssize_t ab8505_powercut_maxtime_read(struct device *dev, |
2629 | struct device_attribute *attr, |
2630 | char *buf) |
2631 | { |
2632 | int ret; |
2633 | u8 reg_value; |
2634 | struct power_supply *psy = dev_get_drvdata(dev); |
2635 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
2636 | |
2637 | ret = abx500_get_register_interruptible(dev: di->dev, AB8500_RTC, |
2638 | AB8505_RTC_PCUT_MAX_TIME_REG, value: ®_value); |
2639 | |
2640 | if (ret < 0) { |
2641 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_MAX_TIME_REG\n" ); |
2642 | goto fail; |
2643 | } |
2644 | |
2645 | return sysfs_emit(buf, fmt: "%d\n" , (reg_value & 0x7F)); |
2646 | |
2647 | fail: |
2648 | return ret; |
2649 | |
2650 | } |
2651 | |
2652 | static ssize_t ab8505_powercut_maxtime_write(struct device *dev, |
2653 | struct device_attribute *attr, |
2654 | const char *buf, size_t count) |
2655 | { |
2656 | int ret; |
2657 | int reg_value; |
2658 | struct power_supply *psy = dev_get_drvdata(dev); |
2659 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
2660 | |
2661 | if (kstrtoint(s: buf, base: 10, res: ®_value)) |
2662 | goto fail; |
2663 | |
2664 | if (reg_value > 0x7F) { |
2665 | dev_err(dev, "Incorrect parameter, echo 0 (0.0s) - 127 (1.98s) for maxtime\n" ); |
2666 | goto fail; |
2667 | } |
2668 | |
2669 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_RTC, |
2670 | AB8505_RTC_PCUT_MAX_TIME_REG, value: (u8)reg_value); |
2671 | |
2672 | if (ret < 0) |
2673 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_MAX_TIME_REG\n" ); |
2674 | |
2675 | fail: |
2676 | return count; |
2677 | } |
2678 | |
2679 | static ssize_t ab8505_powercut_restart_read(struct device *dev, |
2680 | struct device_attribute *attr, |
2681 | char *buf) |
2682 | { |
2683 | int ret; |
2684 | u8 reg_value; |
2685 | struct power_supply *psy = dev_get_drvdata(dev); |
2686 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
2687 | |
2688 | ret = abx500_get_register_interruptible(dev: di->dev, AB8500_RTC, |
2689 | AB8505_RTC_PCUT_RESTART_REG, value: ®_value); |
2690 | |
2691 | if (ret < 0) { |
2692 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_RESTART_REG\n" ); |
2693 | goto fail; |
2694 | } |
2695 | |
2696 | return sysfs_emit(buf, fmt: "%d\n" , (reg_value & 0xF)); |
2697 | |
2698 | fail: |
2699 | return ret; |
2700 | } |
2701 | |
2702 | static ssize_t ab8505_powercut_restart_write(struct device *dev, |
2703 | struct device_attribute *attr, |
2704 | const char *buf, size_t count) |
2705 | { |
2706 | int ret; |
2707 | int reg_value; |
2708 | struct power_supply *psy = dev_get_drvdata(dev); |
2709 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
2710 | |
2711 | if (kstrtoint(s: buf, base: 10, res: ®_value)) |
2712 | goto fail; |
2713 | |
2714 | if (reg_value > 0xF) { |
2715 | dev_err(dev, "Incorrect parameter, echo 0 - 15 for number of restart\n" ); |
2716 | goto fail; |
2717 | } |
2718 | |
2719 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_RTC, |
2720 | AB8505_RTC_PCUT_RESTART_REG, value: (u8)reg_value); |
2721 | |
2722 | if (ret < 0) |
2723 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_RESTART_REG\n" ); |
2724 | |
2725 | fail: |
2726 | return count; |
2727 | |
2728 | } |
2729 | |
2730 | static ssize_t ab8505_powercut_timer_read(struct device *dev, |
2731 | struct device_attribute *attr, |
2732 | char *buf) |
2733 | { |
2734 | int ret; |
2735 | u8 reg_value; |
2736 | struct power_supply *psy = dev_get_drvdata(dev); |
2737 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
2738 | |
2739 | ret = abx500_get_register_interruptible(dev: di->dev, AB8500_RTC, |
2740 | AB8505_RTC_PCUT_TIME_REG, value: ®_value); |
2741 | |
2742 | if (ret < 0) { |
2743 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_TIME_REG\n" ); |
2744 | goto fail; |
2745 | } |
2746 | |
2747 | return sysfs_emit(buf, fmt: "%d\n" , (reg_value & 0x7F)); |
2748 | |
2749 | fail: |
2750 | return ret; |
2751 | } |
2752 | |
2753 | static ssize_t ab8505_powercut_restart_counter_read(struct device *dev, |
2754 | struct device_attribute *attr, |
2755 | char *buf) |
2756 | { |
2757 | int ret; |
2758 | u8 reg_value; |
2759 | struct power_supply *psy = dev_get_drvdata(dev); |
2760 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
2761 | |
2762 | ret = abx500_get_register_interruptible(dev: di->dev, AB8500_RTC, |
2763 | AB8505_RTC_PCUT_RESTART_REG, value: ®_value); |
2764 | |
2765 | if (ret < 0) { |
2766 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_RESTART_REG\n" ); |
2767 | goto fail; |
2768 | } |
2769 | |
2770 | return sysfs_emit(buf, fmt: "%d\n" , (reg_value & 0xF0) >> 4); |
2771 | |
2772 | fail: |
2773 | return ret; |
2774 | } |
2775 | |
2776 | static ssize_t ab8505_powercut_read(struct device *dev, |
2777 | struct device_attribute *attr, |
2778 | char *buf) |
2779 | { |
2780 | int ret; |
2781 | u8 reg_value; |
2782 | struct power_supply *psy = dev_get_drvdata(dev); |
2783 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
2784 | |
2785 | ret = abx500_get_register_interruptible(dev: di->dev, AB8500_RTC, |
2786 | AB8505_RTC_PCUT_CTL_STATUS_REG, value: ®_value); |
2787 | |
2788 | if (ret < 0) |
2789 | goto fail; |
2790 | |
2791 | return sysfs_emit(buf, fmt: "%d\n" , (reg_value & 0x1)); |
2792 | |
2793 | fail: |
2794 | return ret; |
2795 | } |
2796 | |
2797 | static ssize_t ab8505_powercut_write(struct device *dev, |
2798 | struct device_attribute *attr, |
2799 | const char *buf, size_t count) |
2800 | { |
2801 | int ret; |
2802 | int reg_value; |
2803 | struct power_supply *psy = dev_get_drvdata(dev); |
2804 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
2805 | |
2806 | if (kstrtoint(s: buf, base: 10, res: ®_value)) |
2807 | goto fail; |
2808 | |
2809 | if (reg_value > 0x1) { |
2810 | dev_err(dev, "Incorrect parameter, echo 0/1 to disable/enable Pcut feature\n" ); |
2811 | goto fail; |
2812 | } |
2813 | |
2814 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_RTC, |
2815 | AB8505_RTC_PCUT_CTL_STATUS_REG, value: (u8)reg_value); |
2816 | |
2817 | if (ret < 0) |
2818 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_CTL_STATUS_REG\n" ); |
2819 | |
2820 | fail: |
2821 | return count; |
2822 | } |
2823 | |
2824 | static ssize_t ab8505_powercut_flag_read(struct device *dev, |
2825 | struct device_attribute *attr, |
2826 | char *buf) |
2827 | { |
2828 | |
2829 | int ret; |
2830 | u8 reg_value; |
2831 | struct power_supply *psy = dev_get_drvdata(dev); |
2832 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
2833 | |
2834 | ret = abx500_get_register_interruptible(dev: di->dev, AB8500_RTC, |
2835 | AB8505_RTC_PCUT_CTL_STATUS_REG, value: ®_value); |
2836 | |
2837 | if (ret < 0) { |
2838 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_CTL_STATUS_REG\n" ); |
2839 | goto fail; |
2840 | } |
2841 | |
2842 | return sysfs_emit(buf, fmt: "%d\n" , ((reg_value & 0x10) >> 4)); |
2843 | |
2844 | fail: |
2845 | return ret; |
2846 | } |
2847 | |
2848 | static ssize_t ab8505_powercut_debounce_read(struct device *dev, |
2849 | struct device_attribute *attr, |
2850 | char *buf) |
2851 | { |
2852 | int ret; |
2853 | u8 reg_value; |
2854 | struct power_supply *psy = dev_get_drvdata(dev); |
2855 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
2856 | |
2857 | ret = abx500_get_register_interruptible(dev: di->dev, AB8500_RTC, |
2858 | AB8505_RTC_PCUT_DEBOUNCE_REG, value: ®_value); |
2859 | |
2860 | if (ret < 0) { |
2861 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_DEBOUNCE_REG\n" ); |
2862 | goto fail; |
2863 | } |
2864 | |
2865 | return sysfs_emit(buf, fmt: "%d\n" , (reg_value & 0x7)); |
2866 | |
2867 | fail: |
2868 | return ret; |
2869 | } |
2870 | |
2871 | static ssize_t ab8505_powercut_debounce_write(struct device *dev, |
2872 | struct device_attribute *attr, |
2873 | const char *buf, size_t count) |
2874 | { |
2875 | int ret; |
2876 | int reg_value; |
2877 | struct power_supply *psy = dev_get_drvdata(dev); |
2878 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
2879 | |
2880 | if (kstrtoint(s: buf, base: 10, res: ®_value)) |
2881 | goto fail; |
2882 | |
2883 | if (reg_value > 0x7) { |
2884 | dev_err(dev, "Incorrect parameter, echo 0 to 7 for debounce setting\n" ); |
2885 | goto fail; |
2886 | } |
2887 | |
2888 | ret = abx500_set_register_interruptible(dev: di->dev, AB8500_RTC, |
2889 | AB8505_RTC_PCUT_DEBOUNCE_REG, value: (u8)reg_value); |
2890 | |
2891 | if (ret < 0) |
2892 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_DEBOUNCE_REG\n" ); |
2893 | |
2894 | fail: |
2895 | return count; |
2896 | } |
2897 | |
2898 | static ssize_t ab8505_powercut_enable_status_read(struct device *dev, |
2899 | struct device_attribute *attr, |
2900 | char *buf) |
2901 | { |
2902 | int ret; |
2903 | u8 reg_value; |
2904 | struct power_supply *psy = dev_get_drvdata(dev); |
2905 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
2906 | |
2907 | ret = abx500_get_register_interruptible(dev: di->dev, AB8500_RTC, |
2908 | AB8505_RTC_PCUT_CTL_STATUS_REG, value: ®_value); |
2909 | |
2910 | if (ret < 0) { |
2911 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_CTL_STATUS_REG\n" ); |
2912 | goto fail; |
2913 | } |
2914 | |
2915 | return sysfs_emit(buf, fmt: "%d\n" , ((reg_value & 0x20) >> 5)); |
2916 | |
2917 | fail: |
2918 | return ret; |
2919 | } |
2920 | |
2921 | static struct device_attribute ab8505_fg_sysfs_psy_attrs[] = { |
2922 | __ATTR(powercut_flagtime, (S_IRUGO | S_IWUSR | S_IWGRP), |
2923 | ab8505_powercut_flagtime_read, ab8505_powercut_flagtime_write), |
2924 | __ATTR(powercut_maxtime, (S_IRUGO | S_IWUSR | S_IWGRP), |
2925 | ab8505_powercut_maxtime_read, ab8505_powercut_maxtime_write), |
2926 | __ATTR(powercut_restart_max, (S_IRUGO | S_IWUSR | S_IWGRP), |
2927 | ab8505_powercut_restart_read, ab8505_powercut_restart_write), |
2928 | __ATTR(powercut_timer, S_IRUGO, ab8505_powercut_timer_read, NULL), |
2929 | __ATTR(powercut_restart_counter, S_IRUGO, |
2930 | ab8505_powercut_restart_counter_read, NULL), |
2931 | __ATTR(powercut_enable, (S_IRUGO | S_IWUSR | S_IWGRP), |
2932 | ab8505_powercut_read, ab8505_powercut_write), |
2933 | __ATTR(powercut_flag, S_IRUGO, ab8505_powercut_flag_read, NULL), |
2934 | __ATTR(powercut_debounce_time, (S_IRUGO | S_IWUSR | S_IWGRP), |
2935 | ab8505_powercut_debounce_read, ab8505_powercut_debounce_write), |
2936 | __ATTR(powercut_enable_status, S_IRUGO, |
2937 | ab8505_powercut_enable_status_read, NULL), |
2938 | }; |
2939 | |
2940 | static int ab8500_fg_sysfs_psy_create_attrs(struct ab8500_fg *di) |
2941 | { |
2942 | unsigned int i; |
2943 | |
2944 | if (is_ab8505(ab: di->parent)) { |
2945 | for (i = 0; i < ARRAY_SIZE(ab8505_fg_sysfs_psy_attrs); i++) |
2946 | if (device_create_file(device: &di->fg_psy->dev, |
2947 | entry: &ab8505_fg_sysfs_psy_attrs[i])) |
2948 | goto sysfs_psy_create_attrs_failed_ab8505; |
2949 | } |
2950 | return 0; |
2951 | sysfs_psy_create_attrs_failed_ab8505: |
2952 | dev_err(&di->fg_psy->dev, "Failed creating sysfs psy attrs for ab8505.\n" ); |
2953 | while (i--) |
2954 | device_remove_file(dev: &di->fg_psy->dev, |
2955 | attr: &ab8505_fg_sysfs_psy_attrs[i]); |
2956 | |
2957 | return -EIO; |
2958 | } |
2959 | |
2960 | static void ab8500_fg_sysfs_psy_remove_attrs(struct ab8500_fg *di) |
2961 | { |
2962 | unsigned int i; |
2963 | |
2964 | if (is_ab8505(ab: di->parent)) { |
2965 | for (i = 0; i < ARRAY_SIZE(ab8505_fg_sysfs_psy_attrs); i++) |
2966 | (void)device_remove_file(dev: &di->fg_psy->dev, |
2967 | attr: &ab8505_fg_sysfs_psy_attrs[i]); |
2968 | } |
2969 | } |
2970 | |
2971 | /* Exposure to the sysfs interface <<END>> */ |
2972 | |
2973 | static int __maybe_unused ab8500_fg_resume(struct device *dev) |
2974 | { |
2975 | struct ab8500_fg *di = dev_get_drvdata(dev); |
2976 | |
2977 | /* |
2978 | * Change state if we're not charging. If we're charging we will wake |
2979 | * up on the FG IRQ |
2980 | */ |
2981 | if (!di->flags.charging) { |
2982 | ab8500_fg_discharge_state_to(di, new_state: AB8500_FG_DISCHARGE_WAKEUP); |
2983 | queue_work(wq: di->fg_wq, work: &di->fg_work); |
2984 | } |
2985 | |
2986 | return 0; |
2987 | } |
2988 | |
2989 | static int __maybe_unused ab8500_fg_suspend(struct device *dev) |
2990 | { |
2991 | struct ab8500_fg *di = dev_get_drvdata(dev); |
2992 | |
2993 | flush_delayed_work(dwork: &di->fg_periodic_work); |
2994 | flush_work(work: &di->fg_work); |
2995 | flush_work(work: &di->fg_acc_cur_work); |
2996 | flush_delayed_work(dwork: &di->fg_reinit_work); |
2997 | flush_delayed_work(dwork: &di->fg_low_bat_work); |
2998 | flush_delayed_work(dwork: &di->fg_check_hw_failure_work); |
2999 | |
3000 | /* |
3001 | * If the FG is enabled we will disable it before going to suspend |
3002 | * only if we're not charging |
3003 | */ |
3004 | if (di->flags.fg_enabled && !di->flags.charging) |
3005 | ab8500_fg_coulomb_counter(di, enable: false); |
3006 | |
3007 | return 0; |
3008 | } |
3009 | |
3010 | /* ab8500 fg driver interrupts and their respective isr */ |
3011 | static struct ab8500_fg_interrupts ab8500_fg_irq[] = { |
3012 | {"NCONV_ACCU" , ab8500_fg_cc_convend_handler}, |
3013 | {"BATT_OVV" , ab8500_fg_batt_ovv_handler}, |
3014 | {"LOW_BAT_F" , ab8500_fg_lowbatf_handler}, |
3015 | {"CC_INT_CALIB" , ab8500_fg_cc_int_calib_handler}, |
3016 | {"CCEOC" , ab8500_fg_cc_data_end_handler}, |
3017 | }; |
3018 | |
3019 | static char *supply_interface[] = { |
3020 | "ab8500_chargalg" , |
3021 | "ab8500_usb" , |
3022 | }; |
3023 | |
3024 | static const struct power_supply_desc ab8500_fg_desc = { |
3025 | .name = "ab8500_fg" , |
3026 | .type = POWER_SUPPLY_TYPE_BATTERY, |
3027 | .properties = ab8500_fg_props, |
3028 | .num_properties = ARRAY_SIZE(ab8500_fg_props), |
3029 | .get_property = ab8500_fg_get_property, |
3030 | .external_power_changed = ab8500_fg_external_power_changed, |
3031 | }; |
3032 | |
3033 | static int ab8500_fg_bind(struct device *dev, struct device *master, |
3034 | void *data) |
3035 | { |
3036 | struct ab8500_fg *di = dev_get_drvdata(dev); |
3037 | |
3038 | di->bat_cap.max_mah_design = di->bm->bi->charge_full_design_uah; |
3039 | di->bat_cap.max_mah = di->bat_cap.max_mah_design; |
3040 | di->vbat_nom_uv = di->bm->bi->voltage_max_design_uv; |
3041 | |
3042 | /* Start the coulomb counter */ |
3043 | ab8500_fg_coulomb_counter(di, enable: true); |
3044 | /* Run the FG algorithm */ |
3045 | queue_delayed_work(wq: di->fg_wq, dwork: &di->fg_periodic_work, delay: 0); |
3046 | |
3047 | return 0; |
3048 | } |
3049 | |
3050 | static void ab8500_fg_unbind(struct device *dev, struct device *master, |
3051 | void *data) |
3052 | { |
3053 | struct ab8500_fg *di = dev_get_drvdata(dev); |
3054 | int ret; |
3055 | |
3056 | /* Disable coulomb counter */ |
3057 | ret = ab8500_fg_coulomb_counter(di, enable: false); |
3058 | if (ret) |
3059 | dev_err(dev, "failed to disable coulomb counter\n" ); |
3060 | |
3061 | flush_workqueue(di->fg_wq); |
3062 | } |
3063 | |
3064 | static const struct component_ops ab8500_fg_component_ops = { |
3065 | .bind = ab8500_fg_bind, |
3066 | .unbind = ab8500_fg_unbind, |
3067 | }; |
3068 | |
3069 | static int ab8500_fg_probe(struct platform_device *pdev) |
3070 | { |
3071 | struct device *dev = &pdev->dev; |
3072 | struct power_supply_config psy_cfg = {}; |
3073 | struct ab8500_fg *di; |
3074 | int i, irq; |
3075 | int ret = 0; |
3076 | |
3077 | di = devm_kzalloc(dev, size: sizeof(*di), GFP_KERNEL); |
3078 | if (!di) |
3079 | return -ENOMEM; |
3080 | |
3081 | di->bm = &ab8500_bm_data; |
3082 | |
3083 | mutex_init(&di->cc_lock); |
3084 | |
3085 | /* get parent data */ |
3086 | di->dev = dev; |
3087 | di->parent = dev_get_drvdata(dev: pdev->dev.parent); |
3088 | |
3089 | di->main_bat_v = devm_iio_channel_get(dev, consumer_channel: "main_bat_v" ); |
3090 | if (IS_ERR(ptr: di->main_bat_v)) { |
3091 | ret = dev_err_probe(dev, err: PTR_ERR(ptr: di->main_bat_v), |
3092 | fmt: "failed to get main battery ADC channel\n" ); |
3093 | return ret; |
3094 | } |
3095 | |
3096 | if (!of_property_read_u32(np: dev->of_node, propname: "line-impedance-micro-ohms" , |
3097 | out_value: &di->line_impedance_uohm)) |
3098 | dev_info(dev, "line impedance: %u uOhm\n" , |
3099 | di->line_impedance_uohm); |
3100 | |
3101 | psy_cfg.supplied_to = supply_interface; |
3102 | psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); |
3103 | psy_cfg.drv_data = di; |
3104 | |
3105 | di->init_capacity = true; |
3106 | |
3107 | ab8500_fg_charge_state_to(di, new_state: AB8500_FG_CHARGE_INIT); |
3108 | ab8500_fg_discharge_state_to(di, new_state: AB8500_FG_DISCHARGE_INIT); |
3109 | |
3110 | /* Create a work queue for running the FG algorithm */ |
3111 | di->fg_wq = alloc_ordered_workqueue("ab8500_fg_wq" , WQ_MEM_RECLAIM); |
3112 | if (di->fg_wq == NULL) { |
3113 | dev_err(dev, "failed to create work queue\n" ); |
3114 | return -ENOMEM; |
3115 | } |
3116 | |
3117 | /* Init work for running the fg algorithm instantly */ |
3118 | INIT_WORK(&di->fg_work, ab8500_fg_instant_work); |
3119 | |
3120 | /* Init work for getting the battery accumulated current */ |
3121 | INIT_WORK(&di->fg_acc_cur_work, ab8500_fg_acc_cur_work); |
3122 | |
3123 | /* Init work for reinitialising the fg algorithm */ |
3124 | INIT_DEFERRABLE_WORK(&di->fg_reinit_work, |
3125 | ab8500_fg_reinit_work); |
3126 | |
3127 | /* Work delayed Queue to run the state machine */ |
3128 | INIT_DEFERRABLE_WORK(&di->fg_periodic_work, |
3129 | ab8500_fg_periodic_work); |
3130 | |
3131 | /* Work to check low battery condition */ |
3132 | INIT_DEFERRABLE_WORK(&di->fg_low_bat_work, |
3133 | ab8500_fg_low_bat_work); |
3134 | |
3135 | /* Init work for HW failure check */ |
3136 | INIT_DEFERRABLE_WORK(&di->fg_check_hw_failure_work, |
3137 | ab8500_fg_check_hw_failure_work); |
3138 | |
3139 | /* Reset battery low voltage flag */ |
3140 | di->flags.low_bat = false; |
3141 | |
3142 | /* Initialize low battery counter */ |
3143 | di->low_bat_cnt = 10; |
3144 | |
3145 | /* Initialize OVV, and other registers */ |
3146 | ret = ab8500_fg_init_hw_registers(di); |
3147 | if (ret) { |
3148 | dev_err(dev, "failed to initialize registers\n" ); |
3149 | destroy_workqueue(wq: di->fg_wq); |
3150 | return ret; |
3151 | } |
3152 | |
3153 | /* Consider battery unknown until we're informed otherwise */ |
3154 | di->flags.batt_unknown = true; |
3155 | di->flags.batt_id_received = false; |
3156 | |
3157 | /* Register FG power supply class */ |
3158 | di->fg_psy = devm_power_supply_register(parent: dev, desc: &ab8500_fg_desc, cfg: &psy_cfg); |
3159 | if (IS_ERR(ptr: di->fg_psy)) { |
3160 | dev_err(dev, "failed to register FG psy\n" ); |
3161 | destroy_workqueue(wq: di->fg_wq); |
3162 | return PTR_ERR(ptr: di->fg_psy); |
3163 | } |
3164 | |
3165 | di->fg_samples = SEC_TO_SAMPLE(di->bm->fg_params->init_timer); |
3166 | |
3167 | /* |
3168 | * Initialize completion used to notify completion and start |
3169 | * of inst current |
3170 | */ |
3171 | init_completion(x: &di->ab8500_fg_started); |
3172 | init_completion(x: &di->ab8500_fg_complete); |
3173 | |
3174 | /* Register primary interrupt handlers */ |
3175 | for (i = 0; i < ARRAY_SIZE(ab8500_fg_irq); i++) { |
3176 | irq = platform_get_irq_byname(pdev, ab8500_fg_irq[i].name); |
3177 | if (irq < 0) { |
3178 | destroy_workqueue(wq: di->fg_wq); |
3179 | return irq; |
3180 | } |
3181 | |
3182 | ret = devm_request_threaded_irq(dev, irq, NULL, |
3183 | thread_fn: ab8500_fg_irq[i].isr, |
3184 | IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT, |
3185 | devname: ab8500_fg_irq[i].name, dev_id: di); |
3186 | |
3187 | if (ret != 0) { |
3188 | dev_err(dev, "failed to request %s IRQ %d: %d\n" , |
3189 | ab8500_fg_irq[i].name, irq, ret); |
3190 | destroy_workqueue(wq: di->fg_wq); |
3191 | return ret; |
3192 | } |
3193 | dev_dbg(dev, "Requested %s IRQ %d: %d\n" , |
3194 | ab8500_fg_irq[i].name, irq, ret); |
3195 | } |
3196 | |
3197 | di->irq = platform_get_irq_byname(pdev, "CCEOC" ); |
3198 | disable_irq(irq: di->irq); |
3199 | di->nbr_cceoc_irq_cnt = 0; |
3200 | |
3201 | platform_set_drvdata(pdev, data: di); |
3202 | |
3203 | ret = ab8500_fg_sysfs_init(di); |
3204 | if (ret) { |
3205 | dev_err(dev, "failed to create sysfs entry\n" ); |
3206 | destroy_workqueue(wq: di->fg_wq); |
3207 | return ret; |
3208 | } |
3209 | |
3210 | ret = ab8500_fg_sysfs_psy_create_attrs(di); |
3211 | if (ret) { |
3212 | dev_err(dev, "failed to create FG psy\n" ); |
3213 | ab8500_fg_sysfs_exit(di); |
3214 | destroy_workqueue(wq: di->fg_wq); |
3215 | return ret; |
3216 | } |
3217 | |
3218 | /* Calibrate the fg first time */ |
3219 | di->flags.calibrate = true; |
3220 | di->calib_state = AB8500_FG_CALIB_INIT; |
3221 | |
3222 | /* Use room temp as default value until we get an update from driver. */ |
3223 | di->bat_temp = 210; |
3224 | |
3225 | list_add_tail(new: &di->node, head: &ab8500_fg_list); |
3226 | |
3227 | return component_add(dev, &ab8500_fg_component_ops); |
3228 | } |
3229 | |
3230 | static void ab8500_fg_remove(struct platform_device *pdev) |
3231 | { |
3232 | struct ab8500_fg *di = platform_get_drvdata(pdev); |
3233 | |
3234 | destroy_workqueue(wq: di->fg_wq); |
3235 | component_del(&pdev->dev, &ab8500_fg_component_ops); |
3236 | list_del(entry: &di->node); |
3237 | ab8500_fg_sysfs_exit(di); |
3238 | ab8500_fg_sysfs_psy_remove_attrs(di); |
3239 | } |
3240 | |
3241 | static SIMPLE_DEV_PM_OPS(ab8500_fg_pm_ops, ab8500_fg_suspend, ab8500_fg_resume); |
3242 | |
3243 | static const struct of_device_id ab8500_fg_match[] = { |
3244 | { .compatible = "stericsson,ab8500-fg" , }, |
3245 | { }, |
3246 | }; |
3247 | MODULE_DEVICE_TABLE(of, ab8500_fg_match); |
3248 | |
3249 | struct platform_driver ab8500_fg_driver = { |
3250 | .probe = ab8500_fg_probe, |
3251 | .remove_new = ab8500_fg_remove, |
3252 | .driver = { |
3253 | .name = "ab8500-fg" , |
3254 | .of_match_table = ab8500_fg_match, |
3255 | .pm = &ab8500_fg_pm_ops, |
3256 | }, |
3257 | }; |
3258 | MODULE_LICENSE("GPL v2" ); |
3259 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski" ); |
3260 | MODULE_ALIAS("platform:ab8500-fg" ); |
3261 | MODULE_DESCRIPTION("AB8500 Fuel Gauge driver" ); |
3262 | |