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0376148f | 1 | // SPDX-License-Identifier: GPL-2.0-only |
13151631 AM |
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 | * | |
13151631 AM |
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/device.h> | |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/power_supply.h> | |
24 | #include <linux/kobject.h> | |
13151631 | 25 | #include <linux/slab.h> |
13151631 | 26 | #include <linux/delay.h> |
13151631 | 27 | #include <linux/time.h> |
8000ebf7 | 28 | #include <linux/time64.h> |
e0f1abeb | 29 | #include <linux/of.h> |
13151631 | 30 | #include <linux/completion.h> |
e0f1abeb R |
31 | #include <linux/mfd/core.h> |
32 | #include <linux/mfd/abx500.h> | |
33 | #include <linux/mfd/abx500/ab8500.h> | |
34 | #include <linux/mfd/abx500/ab8500-bm.h> | |
1e82623c | 35 | #include <linux/iio/consumer.h> |
6eaf8740 | 36 | #include <linux/kernel.h> |
13151631 AM |
37 | |
38 | #define MILLI_TO_MICRO 1000 | |
39 | #define FG_LSB_IN_MA 1627 | |
0577610e | 40 | #define QLSB_NANO_AMP_HOURS_X10 1071 |
13151631 AM |
41 | #define INS_CURR_TIMEOUT (3 * HZ) |
42 | ||
43 | #define SEC_TO_SAMPLE(S) (S * 4) | |
44 | ||
45 | #define NBR_AVG_SAMPLES 20 | |
46 | ||
75f2a219 | 47 | #define LOW_BAT_CHECK_INTERVAL (HZ / 16) /* 62.5 ms */ |
13151631 AM |
48 | |
49 | #define VALID_CAPACITY_SEC (45 * 60) /* 45 minutes */ | |
50 | #define BATT_OK_MIN 2360 /* mV */ | |
51 | #define BATT_OK_INCREMENT 50 /* mV */ | |
52 | #define BATT_OK_MAX_NR_INCREMENTS 0xE | |
53 | ||
54 | /* FG constants */ | |
55 | #define BATT_OVV 0x01 | |
56 | ||
57 | #define interpolate(x, x1, y1, x2, y2) \ | |
58 | ((y1) + ((((y2) - (y1)) * ((x) - (x1))) / ((x2) - (x1)))); | |
59 | ||
13151631 AM |
60 | /** |
61 | * struct ab8500_fg_interrupts - ab8500 fg interupts | |
62 | * @name: name of the interrupt | |
63 | * @isr function pointer to the isr | |
64 | */ | |
65 | struct ab8500_fg_interrupts { | |
66 | char *name; | |
67 | irqreturn_t (*isr)(int irq, void *data); | |
68 | }; | |
69 | ||
70 | enum ab8500_fg_discharge_state { | |
71 | AB8500_FG_DISCHARGE_INIT, | |
72 | AB8500_FG_DISCHARGE_INITMEASURING, | |
73 | AB8500_FG_DISCHARGE_INIT_RECOVERY, | |
74 | AB8500_FG_DISCHARGE_RECOVERY, | |
75 | AB8500_FG_DISCHARGE_READOUT_INIT, | |
76 | AB8500_FG_DISCHARGE_READOUT, | |
77 | AB8500_FG_DISCHARGE_WAKEUP, | |
78 | }; | |
79 | ||
80 | static char *discharge_state[] = { | |
81 | "DISCHARGE_INIT", | |
82 | "DISCHARGE_INITMEASURING", | |
83 | "DISCHARGE_INIT_RECOVERY", | |
84 | "DISCHARGE_RECOVERY", | |
85 | "DISCHARGE_READOUT_INIT", | |
86 | "DISCHARGE_READOUT", | |
87 | "DISCHARGE_WAKEUP", | |
88 | }; | |
89 | ||
90 | enum ab8500_fg_charge_state { | |
91 | AB8500_FG_CHARGE_INIT, | |
92 | AB8500_FG_CHARGE_READOUT, | |
93 | }; | |
94 | ||
95 | static char *charge_state[] = { | |
96 | "CHARGE_INIT", | |
97 | "CHARGE_READOUT", | |
98 | }; | |
99 | ||
100 | enum ab8500_fg_calibration_state { | |
101 | AB8500_FG_CALIB_INIT, | |
102 | AB8500_FG_CALIB_WAIT, | |
103 | AB8500_FG_CALIB_END, | |
104 | }; | |
105 | ||
106 | struct ab8500_fg_avg_cap { | |
107 | int avg; | |
108 | int samples[NBR_AVG_SAMPLES]; | |
8000ebf7 | 109 | time64_t time_stamps[NBR_AVG_SAMPLES]; |
13151631 AM |
110 | int pos; |
111 | int nbr_samples; | |
112 | int sum; | |
113 | }; | |
114 | ||
ea402401 MC |
115 | struct ab8500_fg_cap_scaling { |
116 | bool enable; | |
117 | int cap_to_scale[2]; | |
118 | int disable_cap_level; | |
119 | int scaled_cap; | |
120 | }; | |
121 | ||
13151631 AM |
122 | struct ab8500_fg_battery_capacity { |
123 | int max_mah_design; | |
124 | int max_mah; | |
125 | int mah; | |
126 | int permille; | |
127 | int level; | |
128 | int prev_mah; | |
129 | int prev_percent; | |
130 | int prev_level; | |
131 | int user_mah; | |
ea402401 | 132 | struct ab8500_fg_cap_scaling cap_scale; |
13151631 AM |
133 | }; |
134 | ||
135 | struct ab8500_fg_flags { | |
136 | bool fg_enabled; | |
137 | bool conv_done; | |
138 | bool charging; | |
139 | bool fully_charged; | |
140 | bool force_full; | |
141 | bool low_bat_delay; | |
142 | bool low_bat; | |
143 | bool bat_ovv; | |
144 | bool batt_unknown; | |
145 | bool calibrate; | |
146 | bool user_cap; | |
147 | bool batt_id_received; | |
148 | }; | |
149 | ||
150 | struct inst_curr_result_list { | |
151 | struct list_head list; | |
152 | int *result; | |
153 | }; | |
154 | ||
155 | /** | |
156 | * struct ab8500_fg - ab8500 FG device information | |
157 | * @dev: Pointer to the structure device | |
158 | * @node: a list of AB8500 FGs, hence prepared for reentrance | |
159 | * @irq holds the CCEOC interrupt number | |
160 | * @vbat: Battery voltage in mV | |
161 | * @vbat_nom: Nominal battery voltage in mV | |
162 | * @inst_curr: Instantenous battery current in mA | |
163 | * @avg_curr: Average battery current in mA | |
164 | * @bat_temp battery temperature | |
165 | * @fg_samples: Number of samples used in the FG accumulation | |
166 | * @accu_charge: Accumulated charge from the last conversion | |
167 | * @recovery_cnt: Counter for recovery mode | |
168 | * @high_curr_cnt: Counter for high current mode | |
169 | * @init_cnt: Counter for init mode | |
75f2a219 | 170 | * @low_bat_cnt Counter for number of consecutive low battery measures |
3988a4df | 171 | * @nbr_cceoc_irq_cnt Counter for number of CCEOC irqs received since enabled |
13151631 AM |
172 | * @recovery_needed: Indicate if recovery is needed |
173 | * @high_curr_mode: Indicate if we're in high current mode | |
174 | * @init_capacity: Indicate if initial capacity measuring should be done | |
175 | * @turn_off_fg: True if fg was off before current measurement | |
176 | * @calib_state State during offset calibration | |
177 | * @discharge_state: Current discharge state | |
178 | * @charge_state: Current charge state | |
3988a4df | 179 | * @ab8500_fg_started Completion struct used for the instant current start |
13151631 AM |
180 | * @ab8500_fg_complete Completion struct used for the instant current reading |
181 | * @flags: Structure for information about events triggered | |
182 | * @bat_cap: Structure for battery capacity specific parameters | |
183 | * @avg_cap: Average capacity filter | |
184 | * @parent: Pointer to the struct ab8500 | |
1e82623c | 185 | * @main_bat_v: ADC channel for the main battery voltage |
b0284de0 | 186 | * @bm: Platform specific battery management information |
13151631 AM |
187 | * @fg_psy: Structure that holds the FG specific battery properties |
188 | * @fg_wq: Work queue for running the FG algorithm | |
189 | * @fg_periodic_work: Work to run the FG algorithm periodically | |
190 | * @fg_low_bat_work: Work to check low bat condition | |
191 | * @fg_reinit_work Work used to reset and reinitialise the FG algorithm | |
192 | * @fg_work: Work to run the FG algorithm instantly | |
193 | * @fg_acc_cur_work: Work to read the FG accumulator | |
194 | * @fg_check_hw_failure_work: Work for checking HW state | |
195 | * @cc_lock: Mutex for locking the CC | |
196 | * @fg_kobject: Structure of type kobject | |
197 | */ | |
198 | struct ab8500_fg { | |
199 | struct device *dev; | |
200 | struct list_head node; | |
201 | int irq; | |
202 | int vbat; | |
203 | int vbat_nom; | |
204 | int inst_curr; | |
205 | int avg_curr; | |
206 | int bat_temp; | |
207 | int fg_samples; | |
208 | int accu_charge; | |
209 | int recovery_cnt; | |
210 | int high_curr_cnt; | |
211 | int init_cnt; | |
75f2a219 | 212 | int low_bat_cnt; |
3988a4df | 213 | int nbr_cceoc_irq_cnt; |
13151631 AM |
214 | bool recovery_needed; |
215 | bool high_curr_mode; | |
216 | bool init_capacity; | |
217 | bool turn_off_fg; | |
218 | enum ab8500_fg_calibration_state calib_state; | |
219 | enum ab8500_fg_discharge_state discharge_state; | |
220 | enum ab8500_fg_charge_state charge_state; | |
3988a4df | 221 | struct completion ab8500_fg_started; |
13151631 AM |
222 | struct completion ab8500_fg_complete; |
223 | struct ab8500_fg_flags flags; | |
224 | struct ab8500_fg_battery_capacity bat_cap; | |
225 | struct ab8500_fg_avg_cap avg_cap; | |
226 | struct ab8500 *parent; | |
1e82623c | 227 | struct iio_channel *main_bat_v; |
b0284de0 | 228 | struct abx500_bm_data *bm; |
297d716f | 229 | struct power_supply *fg_psy; |
13151631 AM |
230 | struct workqueue_struct *fg_wq; |
231 | struct delayed_work fg_periodic_work; | |
232 | struct delayed_work fg_low_bat_work; | |
233 | struct delayed_work fg_reinit_work; | |
234 | struct work_struct fg_work; | |
235 | struct work_struct fg_acc_cur_work; | |
236 | struct delayed_work fg_check_hw_failure_work; | |
237 | struct mutex cc_lock; | |
238 | struct kobject fg_kobject; | |
239 | }; | |
240 | static LIST_HEAD(ab8500_fg_list); | |
241 | ||
242 | /** | |
243 | * ab8500_fg_get() - returns a reference to the primary AB8500 fuel gauge | |
244 | * (i.e. the first fuel gauge in the instance list) | |
245 | */ | |
246 | struct ab8500_fg *ab8500_fg_get(void) | |
247 | { | |
f04f7aef MY |
248 | return list_first_entry_or_null(&ab8500_fg_list, struct ab8500_fg, |
249 | node); | |
13151631 AM |
250 | } |
251 | ||
252 | /* Main battery properties */ | |
253 | static enum power_supply_property ab8500_fg_props[] = { | |
254 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
255 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
256 | POWER_SUPPLY_PROP_CURRENT_AVG, | |
257 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, | |
258 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
259 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
260 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
261 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
262 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
263 | POWER_SUPPLY_PROP_CAPACITY, | |
264 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
265 | }; | |
266 | ||
267 | /* | |
268 | * This array maps the raw hex value to lowbat voltage used by the AB8500 | |
269 | * Values taken from the UM0836 | |
270 | */ | |
271 | static int ab8500_fg_lowbat_voltage_map[] = { | |
272 | 2300 , | |
273 | 2325 , | |
274 | 2350 , | |
275 | 2375 , | |
276 | 2400 , | |
277 | 2425 , | |
278 | 2450 , | |
279 | 2475 , | |
280 | 2500 , | |
281 | 2525 , | |
282 | 2550 , | |
283 | 2575 , | |
284 | 2600 , | |
285 | 2625 , | |
286 | 2650 , | |
287 | 2675 , | |
288 | 2700 , | |
289 | 2725 , | |
290 | 2750 , | |
291 | 2775 , | |
292 | 2800 , | |
293 | 2825 , | |
294 | 2850 , | |
295 | 2875 , | |
296 | 2900 , | |
297 | 2925 , | |
298 | 2950 , | |
299 | 2975 , | |
300 | 3000 , | |
301 | 3025 , | |
302 | 3050 , | |
303 | 3075 , | |
304 | 3100 , | |
305 | 3125 , | |
306 | 3150 , | |
307 | 3175 , | |
308 | 3200 , | |
309 | 3225 , | |
310 | 3250 , | |
311 | 3275 , | |
312 | 3300 , | |
313 | 3325 , | |
314 | 3350 , | |
315 | 3375 , | |
316 | 3400 , | |
317 | 3425 , | |
318 | 3450 , | |
319 | 3475 , | |
320 | 3500 , | |
321 | 3525 , | |
322 | 3550 , | |
323 | 3575 , | |
324 | 3600 , | |
325 | 3625 , | |
326 | 3650 , | |
327 | 3675 , | |
328 | 3700 , | |
329 | 3725 , | |
330 | 3750 , | |
331 | 3775 , | |
332 | 3800 , | |
333 | 3825 , | |
334 | 3850 , | |
335 | 3850 , | |
336 | }; | |
337 | ||
338 | static u8 ab8500_volt_to_regval(int voltage) | |
339 | { | |
340 | int i; | |
341 | ||
342 | if (voltage < ab8500_fg_lowbat_voltage_map[0]) | |
343 | return 0; | |
344 | ||
345 | for (i = 0; i < ARRAY_SIZE(ab8500_fg_lowbat_voltage_map); i++) { | |
346 | if (voltage < ab8500_fg_lowbat_voltage_map[i]) | |
347 | return (u8) i - 1; | |
348 | } | |
349 | ||
350 | /* If not captured above, return index of last element */ | |
351 | return (u8) ARRAY_SIZE(ab8500_fg_lowbat_voltage_map) - 1; | |
352 | } | |
353 | ||
354 | /** | |
355 | * ab8500_fg_is_low_curr() - Low or high current mode | |
356 | * @di: pointer to the ab8500_fg structure | |
357 | * @curr: the current to base or our decision on | |
358 | * | |
359 | * Low current mode if the current consumption is below a certain threshold | |
360 | */ | |
361 | static int ab8500_fg_is_low_curr(struct ab8500_fg *di, int curr) | |
362 | { | |
363 | /* | |
364 | * We want to know if we're in low current mode | |
365 | */ | |
b0284de0 | 366 | if (curr > -di->bm->fg_params->high_curr_threshold) |
13151631 AM |
367 | return true; |
368 | else | |
369 | return false; | |
370 | } | |
371 | ||
372 | /** | |
373 | * ab8500_fg_add_cap_sample() - Add capacity to average filter | |
374 | * @di: pointer to the ab8500_fg structure | |
375 | * @sample: the capacity in mAh to add to the filter | |
376 | * | |
377 | * A capacity is added to the filter and a new mean capacity is calculated and | |
378 | * returned | |
379 | */ | |
380 | static int ab8500_fg_add_cap_sample(struct ab8500_fg *di, int sample) | |
381 | { | |
8b0d62d4 | 382 | time64_t now = ktime_get_boottime_seconds(); |
13151631 AM |
383 | struct ab8500_fg_avg_cap *avg = &di->avg_cap; |
384 | ||
13151631 AM |
385 | do { |
386 | avg->sum += sample - avg->samples[avg->pos]; | |
387 | avg->samples[avg->pos] = sample; | |
8b0d62d4 | 388 | avg->time_stamps[avg->pos] = now; |
13151631 AM |
389 | avg->pos++; |
390 | ||
391 | if (avg->pos == NBR_AVG_SAMPLES) | |
392 | avg->pos = 0; | |
393 | ||
394 | if (avg->nbr_samples < NBR_AVG_SAMPLES) | |
395 | avg->nbr_samples++; | |
396 | ||
397 | /* | |
398 | * Check the time stamp for each sample. If too old, | |
399 | * replace with latest sample | |
400 | */ | |
8b0d62d4 | 401 | } while (now - VALID_CAPACITY_SEC > avg->time_stamps[avg->pos]); |
13151631 AM |
402 | |
403 | avg->avg = avg->sum / avg->nbr_samples; | |
404 | ||
405 | return avg->avg; | |
406 | } | |
407 | ||
408 | /** | |
409 | * ab8500_fg_clear_cap_samples() - Clear average filter | |
410 | * @di: pointer to the ab8500_fg structure | |
411 | * | |
412 | * The capacity filter is is reset to zero. | |
413 | */ | |
414 | static void ab8500_fg_clear_cap_samples(struct ab8500_fg *di) | |
415 | { | |
416 | int i; | |
417 | struct ab8500_fg_avg_cap *avg = &di->avg_cap; | |
418 | ||
419 | avg->pos = 0; | |
420 | avg->nbr_samples = 0; | |
421 | avg->sum = 0; | |
422 | avg->avg = 0; | |
423 | ||
424 | for (i = 0; i < NBR_AVG_SAMPLES; i++) { | |
425 | avg->samples[i] = 0; | |
426 | avg->time_stamps[i] = 0; | |
427 | } | |
428 | } | |
429 | ||
430 | /** | |
431 | * ab8500_fg_fill_cap_sample() - Fill average filter | |
432 | * @di: pointer to the ab8500_fg structure | |
433 | * @sample: the capacity in mAh to fill the filter with | |
434 | * | |
435 | * The capacity filter is filled with a capacity in mAh | |
436 | */ | |
437 | static void ab8500_fg_fill_cap_sample(struct ab8500_fg *di, int sample) | |
438 | { | |
439 | int i; | |
8b0d62d4 | 440 | time64_t now; |
13151631 AM |
441 | struct ab8500_fg_avg_cap *avg = &di->avg_cap; |
442 | ||
8b0d62d4 | 443 | now = ktime_get_boottime_seconds(); |
13151631 AM |
444 | |
445 | for (i = 0; i < NBR_AVG_SAMPLES; i++) { | |
446 | avg->samples[i] = sample; | |
8b0d62d4 | 447 | avg->time_stamps[i] = now; |
13151631 AM |
448 | } |
449 | ||
450 | avg->pos = 0; | |
451 | avg->nbr_samples = NBR_AVG_SAMPLES; | |
452 | avg->sum = sample * NBR_AVG_SAMPLES; | |
453 | avg->avg = sample; | |
454 | } | |
455 | ||
456 | /** | |
457 | * ab8500_fg_coulomb_counter() - enable coulomb counter | |
458 | * @di: pointer to the ab8500_fg structure | |
459 | * @enable: enable/disable | |
460 | * | |
461 | * Enable/Disable coulomb counter. | |
462 | * On failure returns negative value. | |
463 | */ | |
464 | static int ab8500_fg_coulomb_counter(struct ab8500_fg *di, bool enable) | |
465 | { | |
466 | int ret = 0; | |
467 | mutex_lock(&di->cc_lock); | |
468 | if (enable) { | |
469 | /* To be able to reprogram the number of samples, we have to | |
470 | * first stop the CC and then enable it again */ | |
471 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
472 | AB8500_RTC_CC_CONF_REG, 0x00); | |
473 | if (ret) | |
474 | goto cc_err; | |
475 | ||
476 | /* Program the samples */ | |
477 | ret = abx500_set_register_interruptible(di->dev, | |
478 | AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU, | |
479 | di->fg_samples); | |
480 | if (ret) | |
481 | goto cc_err; | |
482 | ||
483 | /* Start the CC */ | |
484 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
485 | AB8500_RTC_CC_CONF_REG, | |
486 | (CC_DEEP_SLEEP_ENA | CC_PWR_UP_ENA)); | |
487 | if (ret) | |
488 | goto cc_err; | |
489 | ||
490 | di->flags.fg_enabled = true; | |
491 | } else { | |
492 | /* Clear any pending read requests */ | |
e32ad07c KK |
493 | ret = abx500_mask_and_set_register_interruptible(di->dev, |
494 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
495 | (RESET_ACCU | READ_REQ), 0); | |
13151631 AM |
496 | if (ret) |
497 | goto cc_err; | |
498 | ||
499 | ret = abx500_set_register_interruptible(di->dev, | |
500 | AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU_CTRL, 0); | |
501 | if (ret) | |
502 | goto cc_err; | |
503 | ||
504 | /* Stop the CC */ | |
505 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
506 | AB8500_RTC_CC_CONF_REG, 0); | |
507 | if (ret) | |
508 | goto cc_err; | |
509 | ||
510 | di->flags.fg_enabled = false; | |
511 | ||
512 | } | |
513 | dev_dbg(di->dev, " CC enabled: %d Samples: %d\n", | |
514 | enable, di->fg_samples); | |
515 | ||
516 | mutex_unlock(&di->cc_lock); | |
517 | ||
518 | return ret; | |
519 | cc_err: | |
520 | dev_err(di->dev, "%s Enabling coulomb counter failed\n", __func__); | |
521 | mutex_unlock(&di->cc_lock); | |
522 | return ret; | |
523 | } | |
524 | ||
525 | /** | |
526 | * ab8500_fg_inst_curr_start() - start battery instantaneous current | |
527 | * @di: pointer to the ab8500_fg structure | |
528 | * | |
529 | * Returns 0 or error code | |
530 | * Note: This is part "one" and has to be called before | |
531 | * ab8500_fg_inst_curr_finalize() | |
532 | */ | |
3988a4df | 533 | int ab8500_fg_inst_curr_start(struct ab8500_fg *di) |
13151631 AM |
534 | { |
535 | u8 reg_val; | |
536 | int ret; | |
537 | ||
538 | mutex_lock(&di->cc_lock); | |
539 | ||
3988a4df | 540 | di->nbr_cceoc_irq_cnt = 0; |
13151631 AM |
541 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, |
542 | AB8500_RTC_CC_CONF_REG, ®_val); | |
543 | if (ret < 0) | |
544 | goto fail; | |
545 | ||
546 | if (!(reg_val & CC_PWR_UP_ENA)) { | |
547 | dev_dbg(di->dev, "%s Enable FG\n", __func__); | |
548 | di->turn_off_fg = true; | |
549 | ||
550 | /* Program the samples */ | |
551 | ret = abx500_set_register_interruptible(di->dev, | |
552 | AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU, | |
553 | SEC_TO_SAMPLE(10)); | |
554 | if (ret) | |
555 | goto fail; | |
556 | ||
557 | /* Start the CC */ | |
558 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
559 | AB8500_RTC_CC_CONF_REG, | |
560 | (CC_DEEP_SLEEP_ENA | CC_PWR_UP_ENA)); | |
561 | if (ret) | |
562 | goto fail; | |
563 | } else { | |
564 | di->turn_off_fg = false; | |
565 | } | |
566 | ||
567 | /* Return and WFI */ | |
16735d02 WS |
568 | reinit_completion(&di->ab8500_fg_started); |
569 | reinit_completion(&di->ab8500_fg_complete); | |
13151631 AM |
570 | enable_irq(di->irq); |
571 | ||
572 | /* Note: cc_lock is still locked */ | |
573 | return 0; | |
574 | fail: | |
575 | mutex_unlock(&di->cc_lock); | |
576 | return ret; | |
577 | } | |
578 | ||
3988a4df JB |
579 | /** |
580 | * ab8500_fg_inst_curr_started() - check if fg conversion has started | |
581 | * @di: pointer to the ab8500_fg structure | |
582 | * | |
583 | * Returns 1 if conversion started, 0 if still waiting | |
584 | */ | |
585 | int ab8500_fg_inst_curr_started(struct ab8500_fg *di) | |
586 | { | |
587 | return completion_done(&di->ab8500_fg_started); | |
588 | } | |
589 | ||
13151631 AM |
590 | /** |
591 | * ab8500_fg_inst_curr_done() - check if fg conversion is done | |
592 | * @di: pointer to the ab8500_fg structure | |
593 | * | |
594 | * Returns 1 if conversion done, 0 if still waiting | |
595 | */ | |
596 | int ab8500_fg_inst_curr_done(struct ab8500_fg *di) | |
597 | { | |
598 | return completion_done(&di->ab8500_fg_complete); | |
599 | } | |
600 | ||
601 | /** | |
602 | * ab8500_fg_inst_curr_finalize() - battery instantaneous current | |
603 | * @di: pointer to the ab8500_fg structure | |
604 | * @res: battery instantenous current(on success) | |
605 | * | |
606 | * Returns 0 or an error code | |
607 | * Note: This is part "two" and has to be called at earliest 250 ms | |
608 | * after ab8500_fg_inst_curr_start() | |
609 | */ | |
610 | int ab8500_fg_inst_curr_finalize(struct ab8500_fg *di, int *res) | |
611 | { | |
612 | u8 low, high; | |
613 | int val; | |
614 | int ret; | |
5ae6e2a8 | 615 | unsigned long timeout; |
13151631 AM |
616 | |
617 | if (!completion_done(&di->ab8500_fg_complete)) { | |
3988a4df JB |
618 | timeout = wait_for_completion_timeout( |
619 | &di->ab8500_fg_complete, | |
13151631 AM |
620 | INS_CURR_TIMEOUT); |
621 | dev_dbg(di->dev, "Finalize time: %d ms\n", | |
298631e1 | 622 | jiffies_to_msecs(INS_CURR_TIMEOUT - timeout)); |
13151631 AM |
623 | if (!timeout) { |
624 | ret = -ETIME; | |
625 | disable_irq(di->irq); | |
3988a4df | 626 | di->nbr_cceoc_irq_cnt = 0; |
13151631 AM |
627 | dev_err(di->dev, "completion timed out [%d]\n", |
628 | __LINE__); | |
629 | goto fail; | |
630 | } | |
631 | } | |
632 | ||
633 | disable_irq(di->irq); | |
3988a4df | 634 | di->nbr_cceoc_irq_cnt = 0; |
13151631 AM |
635 | |
636 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
637 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
638 | READ_REQ, READ_REQ); | |
639 | ||
640 | /* 100uS between read request and read is needed */ | |
641 | usleep_range(100, 100); | |
642 | ||
643 | /* Read CC Sample conversion value Low and high */ | |
644 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
645 | AB8500_GASG_CC_SMPL_CNVL_REG, &low); | |
646 | if (ret < 0) | |
647 | goto fail; | |
648 | ||
649 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
650 | AB8500_GASG_CC_SMPL_CNVH_REG, &high); | |
651 | if (ret < 0) | |
652 | goto fail; | |
653 | ||
654 | /* | |
655 | * negative value for Discharging | |
656 | * convert 2's compliment into decimal | |
657 | */ | |
658 | if (high & 0x10) | |
659 | val = (low | (high << 8) | 0xFFFFE000); | |
660 | else | |
661 | val = (low | (high << 8)); | |
662 | ||
663 | /* | |
664 | * Convert to unit value in mA | |
665 | * Full scale input voltage is | |
0577610e | 666 | * 63.160mV => LSB = 63.160mV/(4096*res) = 1.542mA |
13151631 | 667 | * Given a 250ms conversion cycle time the LSB corresponds |
0577610e | 668 | * to 107.1 nAh. Convert to current by dividing by the conversion |
13151631 | 669 | * time in hours (250ms = 1 / (3600 * 4)h) |
0577610e | 670 | * 107.1nAh assumes 10mOhm, but fg_res is in 0.1mOhm |
13151631 AM |
671 | */ |
672 | val = (val * QLSB_NANO_AMP_HOURS_X10 * 36 * 4) / | |
b0284de0 | 673 | (1000 * di->bm->fg_res); |
13151631 AM |
674 | |
675 | if (di->turn_off_fg) { | |
676 | dev_dbg(di->dev, "%s Disable FG\n", __func__); | |
677 | ||
678 | /* Clear any pending read requests */ | |
679 | ret = abx500_set_register_interruptible(di->dev, | |
680 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, 0); | |
681 | if (ret) | |
682 | goto fail; | |
683 | ||
684 | /* Stop the CC */ | |
685 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
686 | AB8500_RTC_CC_CONF_REG, 0); | |
687 | if (ret) | |
688 | goto fail; | |
689 | } | |
690 | mutex_unlock(&di->cc_lock); | |
691 | (*res) = val; | |
692 | ||
693 | return 0; | |
694 | fail: | |
695 | mutex_unlock(&di->cc_lock); | |
696 | return ret; | |
697 | } | |
698 | ||
699 | /** | |
700 | * ab8500_fg_inst_curr_blocking() - battery instantaneous current | |
701 | * @di: pointer to the ab8500_fg structure | |
702 | * @res: battery instantenous current(on success) | |
703 | * | |
704 | * Returns 0 else error code | |
705 | */ | |
706 | int ab8500_fg_inst_curr_blocking(struct ab8500_fg *di) | |
707 | { | |
708 | int ret; | |
5ae6e2a8 | 709 | unsigned long timeout; |
13151631 AM |
710 | int res = 0; |
711 | ||
712 | ret = ab8500_fg_inst_curr_start(di); | |
713 | if (ret) { | |
714 | dev_err(di->dev, "Failed to initialize fg_inst\n"); | |
715 | return 0; | |
716 | } | |
717 | ||
3988a4df JB |
718 | /* Wait for CC to actually start */ |
719 | if (!completion_done(&di->ab8500_fg_started)) { | |
720 | timeout = wait_for_completion_timeout( | |
721 | &di->ab8500_fg_started, | |
722 | INS_CURR_TIMEOUT); | |
723 | dev_dbg(di->dev, "Start time: %d ms\n", | |
298631e1 | 724 | jiffies_to_msecs(INS_CURR_TIMEOUT - timeout)); |
3988a4df JB |
725 | if (!timeout) { |
726 | ret = -ETIME; | |
727 | dev_err(di->dev, "completion timed out [%d]\n", | |
728 | __LINE__); | |
729 | goto fail; | |
730 | } | |
731 | } | |
732 | ||
13151631 AM |
733 | ret = ab8500_fg_inst_curr_finalize(di, &res); |
734 | if (ret) { | |
735 | dev_err(di->dev, "Failed to finalize fg_inst\n"); | |
736 | return 0; | |
737 | } | |
738 | ||
3988a4df | 739 | dev_dbg(di->dev, "%s instant current: %d", __func__, res); |
13151631 | 740 | return res; |
3988a4df | 741 | fail: |
129d583b | 742 | disable_irq(di->irq); |
3988a4df JB |
743 | mutex_unlock(&di->cc_lock); |
744 | return ret; | |
13151631 AM |
745 | } |
746 | ||
747 | /** | |
748 | * ab8500_fg_acc_cur_work() - average battery current | |
749 | * @work: pointer to the work_struct structure | |
750 | * | |
751 | * Updated the average battery current obtained from the | |
752 | * coulomb counter. | |
753 | */ | |
754 | static void ab8500_fg_acc_cur_work(struct work_struct *work) | |
755 | { | |
756 | int val; | |
757 | int ret; | |
758 | u8 low, med, high; | |
759 | ||
760 | struct ab8500_fg *di = container_of(work, | |
761 | struct ab8500_fg, fg_acc_cur_work); | |
762 | ||
763 | mutex_lock(&di->cc_lock); | |
764 | ret = abx500_set_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
765 | AB8500_GASG_CC_NCOV_ACCU_CTRL, RD_NCONV_ACCU_REQ); | |
766 | if (ret) | |
767 | goto exit; | |
768 | ||
769 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
770 | AB8500_GASG_CC_NCOV_ACCU_LOW, &low); | |
771 | if (ret < 0) | |
772 | goto exit; | |
773 | ||
774 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
775 | AB8500_GASG_CC_NCOV_ACCU_MED, &med); | |
776 | if (ret < 0) | |
777 | goto exit; | |
778 | ||
779 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
780 | AB8500_GASG_CC_NCOV_ACCU_HIGH, &high); | |
781 | if (ret < 0) | |
782 | goto exit; | |
783 | ||
784 | /* Check for sign bit in case of negative value, 2's compliment */ | |
785 | if (high & 0x10) | |
786 | val = (low | (med << 8) | (high << 16) | 0xFFE00000); | |
787 | else | |
788 | val = (low | (med << 8) | (high << 16)); | |
789 | ||
790 | /* | |
791 | * Convert to uAh | |
792 | * Given a 250ms conversion cycle time the LSB corresponds | |
793 | * to 112.9 nAh. | |
794 | * 112.9nAh assumes 10mOhm, but fg_res is in 0.1mOhm | |
795 | */ | |
796 | di->accu_charge = (val * QLSB_NANO_AMP_HOURS_X10) / | |
b0284de0 | 797 | (100 * di->bm->fg_res); |
13151631 AM |
798 | |
799 | /* | |
800 | * Convert to unit value in mA | |
f902dadc | 801 | * by dividing by the conversion |
13151631 | 802 | * time in hours (= samples / (3600 * 4)h) |
f902dadc | 803 | * and multiply with 1000 |
13151631 AM |
804 | */ |
805 | di->avg_curr = (val * QLSB_NANO_AMP_HOURS_X10 * 36) / | |
b0284de0 | 806 | (1000 * di->bm->fg_res * (di->fg_samples / 4)); |
13151631 AM |
807 | |
808 | di->flags.conv_done = true; | |
809 | ||
810 | mutex_unlock(&di->cc_lock); | |
811 | ||
812 | queue_work(di->fg_wq, &di->fg_work); | |
813 | ||
f902dadc POH |
814 | dev_dbg(di->dev, "fg_res: %d, fg_samples: %d, gasg: %d, accu_charge: %d \n", |
815 | di->bm->fg_res, di->fg_samples, val, di->accu_charge); | |
13151631 AM |
816 | return; |
817 | exit: | |
818 | dev_err(di->dev, | |
819 | "Failed to read or write gas gauge registers\n"); | |
820 | mutex_unlock(&di->cc_lock); | |
821 | queue_work(di->fg_wq, &di->fg_work); | |
822 | } | |
823 | ||
824 | /** | |
825 | * ab8500_fg_bat_voltage() - get battery voltage | |
826 | * @di: pointer to the ab8500_fg structure | |
827 | * | |
828 | * Returns battery voltage(on success) else error code | |
829 | */ | |
830 | static int ab8500_fg_bat_voltage(struct ab8500_fg *di) | |
831 | { | |
1e82623c | 832 | int vbat, ret; |
13151631 AM |
833 | static int prev; |
834 | ||
1e82623c LW |
835 | ret = iio_read_channel_processed(di->main_bat_v, &vbat); |
836 | if (ret < 0) { | |
13151631 | 837 | dev_err(di->dev, |
1e82623c | 838 | "%s ADC conversion failed, using previous value\n", |
13151631 AM |
839 | __func__); |
840 | return prev; | |
841 | } | |
842 | ||
843 | prev = vbat; | |
844 | return vbat; | |
845 | } | |
846 | ||
847 | /** | |
848 | * ab8500_fg_volt_to_capacity() - Voltage based capacity | |
849 | * @di: pointer to the ab8500_fg structure | |
850 | * @voltage: The voltage to convert to a capacity | |
851 | * | |
852 | * Returns battery capacity in per mille based on voltage | |
853 | */ | |
854 | static int ab8500_fg_volt_to_capacity(struct ab8500_fg *di, int voltage) | |
855 | { | |
856 | int i, tbl_size; | |
2c899407 | 857 | const struct abx500_v_to_cap *tbl; |
13151631 AM |
858 | int cap = 0; |
859 | ||
b0284de0 LJ |
860 | tbl = di->bm->bat_type[di->bm->batt_id].v_to_cap_tbl, |
861 | tbl_size = di->bm->bat_type[di->bm->batt_id].n_v_cap_tbl_elements; | |
13151631 AM |
862 | |
863 | for (i = 0; i < tbl_size; ++i) { | |
864 | if (voltage > tbl[i].voltage) | |
865 | break; | |
866 | } | |
867 | ||
868 | if ((i > 0) && (i < tbl_size)) { | |
869 | cap = interpolate(voltage, | |
870 | tbl[i].voltage, | |
871 | tbl[i].capacity * 10, | |
872 | tbl[i-1].voltage, | |
873 | tbl[i-1].capacity * 10); | |
874 | } else if (i == 0) { | |
875 | cap = 1000; | |
876 | } else { | |
877 | cap = 0; | |
878 | } | |
879 | ||
880 | dev_dbg(di->dev, "%s Vbat: %d, Cap: %d per mille", | |
881 | __func__, voltage, cap); | |
882 | ||
883 | return cap; | |
884 | } | |
885 | ||
886 | /** | |
887 | * ab8500_fg_uncomp_volt_to_capacity() - Uncompensated voltage based capacity | |
888 | * @di: pointer to the ab8500_fg structure | |
889 | * | |
890 | * Returns battery capacity based on battery voltage that is not compensated | |
891 | * for the voltage drop due to the load | |
892 | */ | |
893 | static int ab8500_fg_uncomp_volt_to_capacity(struct ab8500_fg *di) | |
894 | { | |
895 | di->vbat = ab8500_fg_bat_voltage(di); | |
896 | return ab8500_fg_volt_to_capacity(di, di->vbat); | |
897 | } | |
898 | ||
899 | /** | |
900 | * ab8500_fg_battery_resistance() - Returns the battery inner resistance | |
901 | * @di: pointer to the ab8500_fg structure | |
902 | * | |
903 | * Returns battery inner resistance added with the fuel gauge resistor value | |
904 | * to get the total resistance in the whole link from gnd to bat+ node. | |
905 | */ | |
906 | static int ab8500_fg_battery_resistance(struct ab8500_fg *di) | |
907 | { | |
908 | int i, tbl_size; | |
2c899407 | 909 | const struct batres_vs_temp *tbl; |
13151631 AM |
910 | int resist = 0; |
911 | ||
b0284de0 LJ |
912 | tbl = di->bm->bat_type[di->bm->batt_id].batres_tbl; |
913 | tbl_size = di->bm->bat_type[di->bm->batt_id].n_batres_tbl_elements; | |
13151631 AM |
914 | |
915 | for (i = 0; i < tbl_size; ++i) { | |
916 | if (di->bat_temp / 10 > tbl[i].temp) | |
917 | break; | |
918 | } | |
919 | ||
920 | if ((i > 0) && (i < tbl_size)) { | |
921 | resist = interpolate(di->bat_temp / 10, | |
922 | tbl[i].temp, | |
923 | tbl[i].resist, | |
924 | tbl[i-1].temp, | |
925 | tbl[i-1].resist); | |
926 | } else if (i == 0) { | |
927 | resist = tbl[0].resist; | |
928 | } else { | |
929 | resist = tbl[tbl_size - 1].resist; | |
930 | } | |
931 | ||
932 | dev_dbg(di->dev, "%s Temp: %d battery internal resistance: %d" | |
933 | " fg resistance %d, total: %d (mOhm)\n", | |
b0284de0 LJ |
934 | __func__, di->bat_temp, resist, di->bm->fg_res / 10, |
935 | (di->bm->fg_res / 10) + resist); | |
13151631 AM |
936 | |
937 | /* fg_res variable is in 0.1mOhm */ | |
b0284de0 | 938 | resist += di->bm->fg_res / 10; |
13151631 AM |
939 | |
940 | return resist; | |
941 | } | |
942 | ||
943 | /** | |
944 | * ab8500_fg_load_comp_volt_to_capacity() - Load compensated voltage based capacity | |
945 | * @di: pointer to the ab8500_fg structure | |
946 | * | |
947 | * Returns battery capacity based on battery voltage that is load compensated | |
948 | * for the voltage drop | |
949 | */ | |
950 | static int ab8500_fg_load_comp_volt_to_capacity(struct ab8500_fg *di) | |
951 | { | |
952 | int vbat_comp, res; | |
953 | int i = 0; | |
954 | int vbat = 0; | |
955 | ||
956 | ab8500_fg_inst_curr_start(di); | |
957 | ||
958 | do { | |
959 | vbat += ab8500_fg_bat_voltage(di); | |
960 | i++; | |
9a0bd070 | 961 | usleep_range(5000, 6000); |
13151631 AM |
962 | } while (!ab8500_fg_inst_curr_done(di)); |
963 | ||
964 | ab8500_fg_inst_curr_finalize(di, &di->inst_curr); | |
965 | ||
966 | di->vbat = vbat / i; | |
967 | res = ab8500_fg_battery_resistance(di); | |
968 | ||
969 | /* Use Ohms law to get the load compensated voltage */ | |
970 | vbat_comp = di->vbat - (di->inst_curr * res) / 1000; | |
971 | ||
972 | dev_dbg(di->dev, "%s Measured Vbat: %dmV,Compensated Vbat %dmV, " | |
973 | "R: %dmOhm, Current: %dmA Vbat Samples: %d\n", | |
974 | __func__, di->vbat, vbat_comp, res, di->inst_curr, i); | |
975 | ||
976 | return ab8500_fg_volt_to_capacity(di, vbat_comp); | |
977 | } | |
978 | ||
979 | /** | |
980 | * ab8500_fg_convert_mah_to_permille() - Capacity in mAh to permille | |
981 | * @di: pointer to the ab8500_fg structure | |
982 | * @cap_mah: capacity in mAh | |
983 | * | |
984 | * Converts capacity in mAh to capacity in permille | |
985 | */ | |
986 | static int ab8500_fg_convert_mah_to_permille(struct ab8500_fg *di, int cap_mah) | |
987 | { | |
988 | return (cap_mah * 1000) / di->bat_cap.max_mah_design; | |
989 | } | |
990 | ||
991 | /** | |
992 | * ab8500_fg_convert_permille_to_mah() - Capacity in permille to mAh | |
993 | * @di: pointer to the ab8500_fg structure | |
994 | * @cap_pm: capacity in permille | |
995 | * | |
996 | * Converts capacity in permille to capacity in mAh | |
997 | */ | |
998 | static int ab8500_fg_convert_permille_to_mah(struct ab8500_fg *di, int cap_pm) | |
999 | { | |
1000 | return cap_pm * di->bat_cap.max_mah_design / 1000; | |
1001 | } | |
1002 | ||
1003 | /** | |
1004 | * ab8500_fg_convert_mah_to_uwh() - Capacity in mAh to uWh | |
1005 | * @di: pointer to the ab8500_fg structure | |
1006 | * @cap_mah: capacity in mAh | |
1007 | * | |
1008 | * Converts capacity in mAh to capacity in uWh | |
1009 | */ | |
1010 | static int ab8500_fg_convert_mah_to_uwh(struct ab8500_fg *di, int cap_mah) | |
1011 | { | |
1012 | u64 div_res; | |
1013 | u32 div_rem; | |
1014 | ||
1015 | div_res = ((u64) cap_mah) * ((u64) di->vbat_nom); | |
1016 | div_rem = do_div(div_res, 1000); | |
1017 | ||
1018 | /* Make sure to round upwards if necessary */ | |
1019 | if (div_rem >= 1000 / 2) | |
1020 | div_res++; | |
1021 | ||
1022 | return (int) div_res; | |
1023 | } | |
1024 | ||
1025 | /** | |
1026 | * ab8500_fg_calc_cap_charging() - Calculate remaining capacity while charging | |
1027 | * @di: pointer to the ab8500_fg structure | |
1028 | * | |
1029 | * Return the capacity in mAh based on previous calculated capcity and the FG | |
1030 | * accumulator register value. The filter is filled with this capacity | |
1031 | */ | |
1032 | static int ab8500_fg_calc_cap_charging(struct ab8500_fg *di) | |
1033 | { | |
1034 | dev_dbg(di->dev, "%s cap_mah %d accu_charge %d\n", | |
1035 | __func__, | |
1036 | di->bat_cap.mah, | |
1037 | di->accu_charge); | |
1038 | ||
1039 | /* Capacity should not be less than 0 */ | |
1040 | if (di->bat_cap.mah + di->accu_charge > 0) | |
1041 | di->bat_cap.mah += di->accu_charge; | |
1042 | else | |
1043 | di->bat_cap.mah = 0; | |
1044 | /* | |
1045 | * We force capacity to 100% once when the algorithm | |
1046 | * reports that it's full. | |
1047 | */ | |
1048 | if (di->bat_cap.mah >= di->bat_cap.max_mah_design || | |
1049 | di->flags.force_full) { | |
1050 | di->bat_cap.mah = di->bat_cap.max_mah_design; | |
1051 | } | |
1052 | ||
1053 | ab8500_fg_fill_cap_sample(di, di->bat_cap.mah); | |
1054 | di->bat_cap.permille = | |
1055 | ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); | |
1056 | ||
1057 | /* We need to update battery voltage and inst current when charging */ | |
1058 | di->vbat = ab8500_fg_bat_voltage(di); | |
1059 | di->inst_curr = ab8500_fg_inst_curr_blocking(di); | |
1060 | ||
1061 | return di->bat_cap.mah; | |
1062 | } | |
1063 | ||
1064 | /** | |
1065 | * ab8500_fg_calc_cap_discharge_voltage() - Capacity in discharge with voltage | |
1066 | * @di: pointer to the ab8500_fg structure | |
1067 | * @comp: if voltage should be load compensated before capacity calc | |
1068 | * | |
1069 | * Return the capacity in mAh based on the battery voltage. The voltage can | |
1070 | * either be load compensated or not. This value is added to the filter and a | |
1071 | * new mean value is calculated and returned. | |
1072 | */ | |
1073 | static int ab8500_fg_calc_cap_discharge_voltage(struct ab8500_fg *di, bool comp) | |
1074 | { | |
1075 | int permille, mah; | |
1076 | ||
1077 | if (comp) | |
1078 | permille = ab8500_fg_load_comp_volt_to_capacity(di); | |
1079 | else | |
1080 | permille = ab8500_fg_uncomp_volt_to_capacity(di); | |
1081 | ||
1082 | mah = ab8500_fg_convert_permille_to_mah(di, permille); | |
1083 | ||
1084 | di->bat_cap.mah = ab8500_fg_add_cap_sample(di, mah); | |
1085 | di->bat_cap.permille = | |
1086 | ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); | |
1087 | ||
1088 | return di->bat_cap.mah; | |
1089 | } | |
1090 | ||
1091 | /** | |
1092 | * ab8500_fg_calc_cap_discharge_fg() - Capacity in discharge with FG | |
1093 | * @di: pointer to the ab8500_fg structure | |
1094 | * | |
1095 | * Return the capacity in mAh based on previous calculated capcity and the FG | |
1096 | * accumulator register value. This value is added to the filter and a | |
1097 | * new mean value is calculated and returned. | |
1098 | */ | |
1099 | static int ab8500_fg_calc_cap_discharge_fg(struct ab8500_fg *di) | |
1100 | { | |
1101 | int permille_volt, permille; | |
1102 | ||
1103 | dev_dbg(di->dev, "%s cap_mah %d accu_charge %d\n", | |
1104 | __func__, | |
1105 | di->bat_cap.mah, | |
1106 | di->accu_charge); | |
1107 | ||
1108 | /* Capacity should not be less than 0 */ | |
1109 | if (di->bat_cap.mah + di->accu_charge > 0) | |
1110 | di->bat_cap.mah += di->accu_charge; | |
1111 | else | |
1112 | di->bat_cap.mah = 0; | |
1113 | ||
1114 | if (di->bat_cap.mah >= di->bat_cap.max_mah_design) | |
1115 | di->bat_cap.mah = di->bat_cap.max_mah_design; | |
1116 | ||
1117 | /* | |
1118 | * Check against voltage based capacity. It can not be lower | |
1119 | * than what the uncompensated voltage says | |
1120 | */ | |
1121 | permille = ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); | |
1122 | permille_volt = ab8500_fg_uncomp_volt_to_capacity(di); | |
1123 | ||
1124 | if (permille < permille_volt) { | |
1125 | di->bat_cap.permille = permille_volt; | |
1126 | di->bat_cap.mah = ab8500_fg_convert_permille_to_mah(di, | |
1127 | di->bat_cap.permille); | |
1128 | ||
1129 | dev_dbg(di->dev, "%s voltage based: perm %d perm_volt %d\n", | |
1130 | __func__, | |
1131 | permille, | |
1132 | permille_volt); | |
1133 | ||
1134 | ab8500_fg_fill_cap_sample(di, di->bat_cap.mah); | |
1135 | } else { | |
1136 | ab8500_fg_fill_cap_sample(di, di->bat_cap.mah); | |
1137 | di->bat_cap.permille = | |
1138 | ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); | |
1139 | } | |
1140 | ||
1141 | return di->bat_cap.mah; | |
1142 | } | |
1143 | ||
1144 | /** | |
1145 | * ab8500_fg_capacity_level() - Get the battery capacity level | |
1146 | * @di: pointer to the ab8500_fg structure | |
1147 | * | |
1148 | * Get the battery capacity level based on the capacity in percent | |
1149 | */ | |
1150 | static int ab8500_fg_capacity_level(struct ab8500_fg *di) | |
1151 | { | |
1152 | int ret, percent; | |
1153 | ||
6eaf8740 | 1154 | percent = DIV_ROUND_CLOSEST(di->bat_cap.permille, 10); |
13151631 | 1155 | |
b0284de0 | 1156 | if (percent <= di->bm->cap_levels->critical || |
13151631 AM |
1157 | di->flags.low_bat) |
1158 | ret = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; | |
b0284de0 | 1159 | else if (percent <= di->bm->cap_levels->low) |
13151631 | 1160 | ret = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
b0284de0 | 1161 | else if (percent <= di->bm->cap_levels->normal) |
13151631 | 1162 | ret = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; |
b0284de0 | 1163 | else if (percent <= di->bm->cap_levels->high) |
13151631 AM |
1164 | ret = POWER_SUPPLY_CAPACITY_LEVEL_HIGH; |
1165 | else | |
1166 | ret = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
1167 | ||
1168 | return ret; | |
1169 | } | |
1170 | ||
ea402401 MC |
1171 | /** |
1172 | * ab8500_fg_calculate_scaled_capacity() - Capacity scaling | |
1173 | * @di: pointer to the ab8500_fg structure | |
1174 | * | |
1175 | * Calculates the capacity to be shown to upper layers. Scales the capacity | |
1176 | * to have 100% as a reference from the actual capacity upon removal of charger | |
1177 | * when charging is in maintenance mode. | |
1178 | */ | |
1179 | static int ab8500_fg_calculate_scaled_capacity(struct ab8500_fg *di) | |
1180 | { | |
1181 | struct ab8500_fg_cap_scaling *cs = &di->bat_cap.cap_scale; | |
1182 | int capacity = di->bat_cap.prev_percent; | |
1183 | ||
1184 | if (!cs->enable) | |
1185 | return capacity; | |
1186 | ||
1187 | /* | |
1188 | * As long as we are in fully charge mode scale the capacity | |
1189 | * to show 100%. | |
1190 | */ | |
1191 | if (di->flags.fully_charged) { | |
1192 | cs->cap_to_scale[0] = 100; | |
1193 | cs->cap_to_scale[1] = | |
1194 | max(capacity, di->bm->fg_params->maint_thres); | |
1195 | dev_dbg(di->dev, "Scale cap with %d/%d\n", | |
1196 | cs->cap_to_scale[0], cs->cap_to_scale[1]); | |
1197 | } | |
1198 | ||
1199 | /* Calculates the scaled capacity. */ | |
1200 | if ((cs->cap_to_scale[0] != cs->cap_to_scale[1]) | |
1201 | && (cs->cap_to_scale[1] > 0)) | |
1202 | capacity = min(100, | |
1203 | DIV_ROUND_CLOSEST(di->bat_cap.prev_percent * | |
1204 | cs->cap_to_scale[0], | |
1205 | cs->cap_to_scale[1])); | |
1206 | ||
1207 | if (di->flags.charging) { | |
1208 | if (capacity < cs->disable_cap_level) { | |
1209 | cs->disable_cap_level = capacity; | |
1210 | dev_dbg(di->dev, "Cap to stop scale lowered %d%%\n", | |
1211 | cs->disable_cap_level); | |
1212 | } else if (!di->flags.fully_charged) { | |
1213 | if (di->bat_cap.prev_percent >= | |
1214 | cs->disable_cap_level) { | |
1215 | dev_dbg(di->dev, "Disabling scaled capacity\n"); | |
1216 | cs->enable = false; | |
1217 | capacity = di->bat_cap.prev_percent; | |
1218 | } else { | |
1219 | dev_dbg(di->dev, | |
1220 | "Waiting in cap to level %d%%\n", | |
1221 | cs->disable_cap_level); | |
1222 | capacity = cs->disable_cap_level; | |
1223 | } | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | return capacity; | |
1228 | } | |
1229 | ||
1230 | /** | |
1231 | * ab8500_fg_update_cap_scalers() - Capacity scaling | |
1232 | * @di: pointer to the ab8500_fg structure | |
1233 | * | |
1234 | * To be called when state change from charge<->discharge to update | |
1235 | * the capacity scalers. | |
1236 | */ | |
1237 | static void ab8500_fg_update_cap_scalers(struct ab8500_fg *di) | |
1238 | { | |
1239 | struct ab8500_fg_cap_scaling *cs = &di->bat_cap.cap_scale; | |
1240 | ||
1241 | if (!cs->enable) | |
1242 | return; | |
1243 | if (di->flags.charging) { | |
1244 | di->bat_cap.cap_scale.disable_cap_level = | |
1245 | di->bat_cap.cap_scale.scaled_cap; | |
1246 | dev_dbg(di->dev, "Cap to stop scale at charge %d%%\n", | |
1247 | di->bat_cap.cap_scale.disable_cap_level); | |
1248 | } else { | |
1249 | if (cs->scaled_cap != 100) { | |
1250 | cs->cap_to_scale[0] = cs->scaled_cap; | |
1251 | cs->cap_to_scale[1] = di->bat_cap.prev_percent; | |
1252 | } else { | |
1253 | cs->cap_to_scale[0] = 100; | |
1254 | cs->cap_to_scale[1] = | |
1255 | max(di->bat_cap.prev_percent, | |
1256 | di->bm->fg_params->maint_thres); | |
1257 | } | |
1258 | ||
1259 | dev_dbg(di->dev, "Cap to scale at discharge %d/%d\n", | |
1260 | cs->cap_to_scale[0], cs->cap_to_scale[1]); | |
1261 | } | |
1262 | } | |
1263 | ||
13151631 AM |
1264 | /** |
1265 | * ab8500_fg_check_capacity_limits() - Check if capacity has changed | |
1266 | * @di: pointer to the ab8500_fg structure | |
1267 | * @init: capacity is allowed to go up in init mode | |
1268 | * | |
1269 | * Check if capacity or capacity limit has changed and notify the system | |
1270 | * about it using the power_supply framework | |
1271 | */ | |
1272 | static void ab8500_fg_check_capacity_limits(struct ab8500_fg *di, bool init) | |
1273 | { | |
1274 | bool changed = false; | |
6eaf8740 | 1275 | int percent = DIV_ROUND_CLOSEST(di->bat_cap.permille, 10); |
13151631 AM |
1276 | |
1277 | di->bat_cap.level = ab8500_fg_capacity_level(di); | |
1278 | ||
1279 | if (di->bat_cap.level != di->bat_cap.prev_level) { | |
1280 | /* | |
1281 | * We do not allow reported capacity level to go up | |
1282 | * unless we're charging or if we're in init | |
1283 | */ | |
1284 | if (!(!di->flags.charging && di->bat_cap.level > | |
1285 | di->bat_cap.prev_level) || init) { | |
1286 | dev_dbg(di->dev, "level changed from %d to %d\n", | |
1287 | di->bat_cap.prev_level, | |
1288 | di->bat_cap.level); | |
1289 | di->bat_cap.prev_level = di->bat_cap.level; | |
1290 | changed = true; | |
1291 | } else { | |
1292 | dev_dbg(di->dev, "level not allowed to go up " | |
1293 | "since no charger is connected: %d to %d\n", | |
1294 | di->bat_cap.prev_level, | |
1295 | di->bat_cap.level); | |
1296 | } | |
1297 | } | |
1298 | ||
1299 | /* | |
1300 | * If we have received the LOW_BAT IRQ, set capacity to 0 to initiate | |
1301 | * shutdown | |
1302 | */ | |
1303 | if (di->flags.low_bat) { | |
1304 | dev_dbg(di->dev, "Battery low, set capacity to 0\n"); | |
1305 | di->bat_cap.prev_percent = 0; | |
1306 | di->bat_cap.permille = 0; | |
6eaf8740 | 1307 | percent = 0; |
13151631 AM |
1308 | di->bat_cap.prev_mah = 0; |
1309 | di->bat_cap.mah = 0; | |
1310 | changed = true; | |
1311 | } else if (di->flags.fully_charged) { | |
1312 | /* | |
1313 | * We report 100% if algorithm reported fully charged | |
ea402401 | 1314 | * and show 100% during maintenance charging (scaling). |
13151631 AM |
1315 | */ |
1316 | if (di->flags.force_full) { | |
6eaf8740 | 1317 | di->bat_cap.prev_percent = percent; |
13151631 | 1318 | di->bat_cap.prev_mah = di->bat_cap.mah; |
ea402401 MC |
1319 | |
1320 | changed = true; | |
1321 | ||
1322 | if (!di->bat_cap.cap_scale.enable && | |
1323 | di->bm->capacity_scaling) { | |
1324 | di->bat_cap.cap_scale.enable = true; | |
1325 | di->bat_cap.cap_scale.cap_to_scale[0] = 100; | |
1326 | di->bat_cap.cap_scale.cap_to_scale[1] = | |
1327 | di->bat_cap.prev_percent; | |
1328 | di->bat_cap.cap_scale.disable_cap_level = 100; | |
1329 | } | |
6eaf8740 | 1330 | } else if (di->bat_cap.prev_percent != percent) { |
13151631 AM |
1331 | dev_dbg(di->dev, |
1332 | "battery reported full " | |
1333 | "but capacity dropping: %d\n", | |
6eaf8740 | 1334 | percent); |
1335 | di->bat_cap.prev_percent = percent; | |
13151631 AM |
1336 | di->bat_cap.prev_mah = di->bat_cap.mah; |
1337 | ||
1338 | changed = true; | |
1339 | } | |
6eaf8740 | 1340 | } else if (di->bat_cap.prev_percent != percent) { |
1341 | if (percent == 0) { | |
13151631 AM |
1342 | /* |
1343 | * We will not report 0% unless we've got | |
1344 | * the LOW_BAT IRQ, no matter what the FG | |
1345 | * algorithm says. | |
1346 | */ | |
1347 | di->bat_cap.prev_percent = 1; | |
6eaf8740 | 1348 | percent = 1; |
13151631 AM |
1349 | |
1350 | changed = true; | |
1351 | } else if (!(!di->flags.charging && | |
6eaf8740 | 1352 | percent > di->bat_cap.prev_percent) || init) { |
13151631 AM |
1353 | /* |
1354 | * We do not allow reported capacity to go up | |
1355 | * unless we're charging or if we're in init | |
1356 | */ | |
1357 | dev_dbg(di->dev, | |
1358 | "capacity changed from %d to %d (%d)\n", | |
1359 | di->bat_cap.prev_percent, | |
6eaf8740 | 1360 | percent, |
13151631 | 1361 | di->bat_cap.permille); |
6eaf8740 | 1362 | di->bat_cap.prev_percent = percent; |
13151631 AM |
1363 | di->bat_cap.prev_mah = di->bat_cap.mah; |
1364 | ||
1365 | changed = true; | |
1366 | } else { | |
1367 | dev_dbg(di->dev, "capacity not allowed to go up since " | |
1368 | "no charger is connected: %d to %d (%d)\n", | |
1369 | di->bat_cap.prev_percent, | |
6eaf8740 | 1370 | percent, |
13151631 AM |
1371 | di->bat_cap.permille); |
1372 | } | |
1373 | } | |
1374 | ||
1375 | if (changed) { | |
ea402401 MC |
1376 | if (di->bm->capacity_scaling) { |
1377 | di->bat_cap.cap_scale.scaled_cap = | |
1378 | ab8500_fg_calculate_scaled_capacity(di); | |
1379 | ||
1380 | dev_info(di->dev, "capacity=%d (%d)\n", | |
1381 | di->bat_cap.prev_percent, | |
1382 | di->bat_cap.cap_scale.scaled_cap); | |
1383 | } | |
297d716f | 1384 | power_supply_changed(di->fg_psy); |
13151631 AM |
1385 | if (di->flags.fully_charged && di->flags.force_full) { |
1386 | dev_dbg(di->dev, "Battery full, notifying.\n"); | |
1387 | di->flags.force_full = false; | |
1388 | sysfs_notify(&di->fg_kobject, NULL, "charge_full"); | |
1389 | } | |
1390 | sysfs_notify(&di->fg_kobject, NULL, "charge_now"); | |
1391 | } | |
1392 | } | |
1393 | ||
1394 | static void ab8500_fg_charge_state_to(struct ab8500_fg *di, | |
1395 | enum ab8500_fg_charge_state new_state) | |
1396 | { | |
1397 | dev_dbg(di->dev, "Charge state from %d [%s] to %d [%s]\n", | |
1398 | di->charge_state, | |
1399 | charge_state[di->charge_state], | |
1400 | new_state, | |
1401 | charge_state[new_state]); | |
1402 | ||
1403 | di->charge_state = new_state; | |
1404 | } | |
1405 | ||
1406 | static void ab8500_fg_discharge_state_to(struct ab8500_fg *di, | |
0fff22ee | 1407 | enum ab8500_fg_discharge_state new_state) |
13151631 | 1408 | { |
8c2fac99 | 1409 | dev_dbg(di->dev, "Discharge state from %d [%s] to %d [%s]\n", |
13151631 AM |
1410 | di->discharge_state, |
1411 | discharge_state[di->discharge_state], | |
1412 | new_state, | |
1413 | discharge_state[new_state]); | |
1414 | ||
1415 | di->discharge_state = new_state; | |
1416 | } | |
1417 | ||
1418 | /** | |
1419 | * ab8500_fg_algorithm_charging() - FG algorithm for when charging | |
1420 | * @di: pointer to the ab8500_fg structure | |
1421 | * | |
1422 | * Battery capacity calculation state machine for when we're charging | |
1423 | */ | |
1424 | static void ab8500_fg_algorithm_charging(struct ab8500_fg *di) | |
1425 | { | |
1426 | /* | |
1427 | * If we change to discharge mode | |
1428 | * we should start with recovery | |
1429 | */ | |
1430 | if (di->discharge_state != AB8500_FG_DISCHARGE_INIT_RECOVERY) | |
1431 | ab8500_fg_discharge_state_to(di, | |
1432 | AB8500_FG_DISCHARGE_INIT_RECOVERY); | |
1433 | ||
1434 | switch (di->charge_state) { | |
1435 | case AB8500_FG_CHARGE_INIT: | |
1436 | di->fg_samples = SEC_TO_SAMPLE( | |
b0284de0 | 1437 | di->bm->fg_params->accu_charging); |
13151631 AM |
1438 | |
1439 | ab8500_fg_coulomb_counter(di, true); | |
1440 | ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_READOUT); | |
1441 | ||
1442 | break; | |
1443 | ||
1444 | case AB8500_FG_CHARGE_READOUT: | |
1445 | /* | |
1446 | * Read the FG and calculate the new capacity | |
1447 | */ | |
1448 | mutex_lock(&di->cc_lock); | |
ea402401 | 1449 | if (!di->flags.conv_done && !di->flags.force_full) { |
13151631 AM |
1450 | /* Wasn't the CC IRQ that got us here */ |
1451 | mutex_unlock(&di->cc_lock); | |
1452 | dev_dbg(di->dev, "%s CC conv not done\n", | |
1453 | __func__); | |
1454 | ||
1455 | break; | |
1456 | } | |
1457 | di->flags.conv_done = false; | |
1458 | mutex_unlock(&di->cc_lock); | |
1459 | ||
1460 | ab8500_fg_calc_cap_charging(di); | |
1461 | ||
1462 | break; | |
1463 | ||
1464 | default: | |
1465 | break; | |
1466 | } | |
1467 | ||
1468 | /* Check capacity limits */ | |
1469 | ab8500_fg_check_capacity_limits(di, false); | |
1470 | } | |
1471 | ||
1472 | static void force_capacity(struct ab8500_fg *di) | |
1473 | { | |
1474 | int cap; | |
1475 | ||
1476 | ab8500_fg_clear_cap_samples(di); | |
1477 | cap = di->bat_cap.user_mah; | |
1478 | if (cap > di->bat_cap.max_mah_design) { | |
1479 | dev_dbg(di->dev, "Remaining cap %d can't be bigger than total" | |
1480 | " %d\n", cap, di->bat_cap.max_mah_design); | |
1481 | cap = di->bat_cap.max_mah_design; | |
1482 | } | |
1483 | ab8500_fg_fill_cap_sample(di, di->bat_cap.user_mah); | |
1484 | di->bat_cap.permille = ab8500_fg_convert_mah_to_permille(di, cap); | |
1485 | di->bat_cap.mah = cap; | |
1486 | ab8500_fg_check_capacity_limits(di, true); | |
1487 | } | |
1488 | ||
1489 | static bool check_sysfs_capacity(struct ab8500_fg *di) | |
1490 | { | |
1491 | int cap, lower, upper; | |
1492 | int cap_permille; | |
1493 | ||
1494 | cap = di->bat_cap.user_mah; | |
1495 | ||
1496 | cap_permille = ab8500_fg_convert_mah_to_permille(di, | |
1497 | di->bat_cap.user_mah); | |
1498 | ||
b0284de0 LJ |
1499 | lower = di->bat_cap.permille - di->bm->fg_params->user_cap_limit * 10; |
1500 | upper = di->bat_cap.permille + di->bm->fg_params->user_cap_limit * 10; | |
13151631 AM |
1501 | |
1502 | if (lower < 0) | |
1503 | lower = 0; | |
1504 | /* 1000 is permille, -> 100 percent */ | |
1505 | if (upper > 1000) | |
1506 | upper = 1000; | |
1507 | ||
1508 | dev_dbg(di->dev, "Capacity limits:" | |
1509 | " (Lower: %d User: %d Upper: %d) [user: %d, was: %d]\n", | |
1510 | lower, cap_permille, upper, cap, di->bat_cap.mah); | |
1511 | ||
1512 | /* If within limits, use the saved capacity and exit estimation...*/ | |
1513 | if (cap_permille > lower && cap_permille < upper) { | |
1514 | dev_dbg(di->dev, "OK! Using users cap %d uAh now\n", cap); | |
1515 | force_capacity(di); | |
1516 | return true; | |
1517 | } | |
1518 | dev_dbg(di->dev, "Capacity from user out of limits, ignoring"); | |
1519 | return false; | |
1520 | } | |
1521 | ||
1522 | /** | |
1523 | * ab8500_fg_algorithm_discharging() - FG algorithm for when discharging | |
1524 | * @di: pointer to the ab8500_fg structure | |
1525 | * | |
1526 | * Battery capacity calculation state machine for when we're discharging | |
1527 | */ | |
1528 | static void ab8500_fg_algorithm_discharging(struct ab8500_fg *di) | |
1529 | { | |
1530 | int sleep_time; | |
1531 | ||
1532 | /* If we change to charge mode we should start with init */ | |
1533 | if (di->charge_state != AB8500_FG_CHARGE_INIT) | |
1534 | ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT); | |
1535 | ||
1536 | switch (di->discharge_state) { | |
1537 | case AB8500_FG_DISCHARGE_INIT: | |
1538 | /* We use the FG IRQ to work on */ | |
1539 | di->init_cnt = 0; | |
b0284de0 | 1540 | di->fg_samples = SEC_TO_SAMPLE(di->bm->fg_params->init_timer); |
13151631 AM |
1541 | ab8500_fg_coulomb_counter(di, true); |
1542 | ab8500_fg_discharge_state_to(di, | |
1543 | AB8500_FG_DISCHARGE_INITMEASURING); | |
1544 | ||
df561f66 | 1545 | fallthrough; |
13151631 AM |
1546 | case AB8500_FG_DISCHARGE_INITMEASURING: |
1547 | /* | |
1548 | * Discard a number of samples during startup. | |
1549 | * After that, use compensated voltage for a few | |
1550 | * samples to get an initial capacity. | |
1551 | * Then go to READOUT | |
1552 | */ | |
b0284de0 | 1553 | sleep_time = di->bm->fg_params->init_timer; |
13151631 AM |
1554 | |
1555 | /* Discard the first [x] seconds */ | |
b0284de0 | 1556 | if (di->init_cnt > di->bm->fg_params->init_discard_time) { |
13151631 AM |
1557 | ab8500_fg_calc_cap_discharge_voltage(di, true); |
1558 | ||
1559 | ab8500_fg_check_capacity_limits(di, true); | |
1560 | } | |
1561 | ||
1562 | di->init_cnt += sleep_time; | |
b0284de0 | 1563 | if (di->init_cnt > di->bm->fg_params->init_total_time) |
13151631 AM |
1564 | ab8500_fg_discharge_state_to(di, |
1565 | AB8500_FG_DISCHARGE_READOUT_INIT); | |
1566 | ||
1567 | break; | |
1568 | ||
1569 | case AB8500_FG_DISCHARGE_INIT_RECOVERY: | |
1570 | di->recovery_cnt = 0; | |
1571 | di->recovery_needed = true; | |
1572 | ab8500_fg_discharge_state_to(di, | |
1573 | AB8500_FG_DISCHARGE_RECOVERY); | |
1574 | ||
df561f66 | 1575 | fallthrough; |
13151631 AM |
1576 | |
1577 | case AB8500_FG_DISCHARGE_RECOVERY: | |
b0284de0 | 1578 | sleep_time = di->bm->fg_params->recovery_sleep_timer; |
13151631 AM |
1579 | |
1580 | /* | |
1581 | * We should check the power consumption | |
1582 | * If low, go to READOUT (after x min) or | |
1583 | * RECOVERY_SLEEP if time left. | |
1584 | * If high, go to READOUT | |
1585 | */ | |
1586 | di->inst_curr = ab8500_fg_inst_curr_blocking(di); | |
1587 | ||
1588 | if (ab8500_fg_is_low_curr(di, di->inst_curr)) { | |
1589 | if (di->recovery_cnt > | |
b0284de0 | 1590 | di->bm->fg_params->recovery_total_time) { |
13151631 | 1591 | di->fg_samples = SEC_TO_SAMPLE( |
b0284de0 | 1592 | di->bm->fg_params->accu_high_curr); |
13151631 AM |
1593 | ab8500_fg_coulomb_counter(di, true); |
1594 | ab8500_fg_discharge_state_to(di, | |
1595 | AB8500_FG_DISCHARGE_READOUT); | |
1596 | di->recovery_needed = false; | |
1597 | } else { | |
1598 | queue_delayed_work(di->fg_wq, | |
1599 | &di->fg_periodic_work, | |
1600 | sleep_time * HZ); | |
1601 | } | |
1602 | di->recovery_cnt += sleep_time; | |
1603 | } else { | |
1604 | di->fg_samples = SEC_TO_SAMPLE( | |
b0284de0 | 1605 | di->bm->fg_params->accu_high_curr); |
13151631 AM |
1606 | ab8500_fg_coulomb_counter(di, true); |
1607 | ab8500_fg_discharge_state_to(di, | |
1608 | AB8500_FG_DISCHARGE_READOUT); | |
1609 | } | |
1610 | break; | |
1611 | ||
1612 | case AB8500_FG_DISCHARGE_READOUT_INIT: | |
1613 | di->fg_samples = SEC_TO_SAMPLE( | |
b0284de0 | 1614 | di->bm->fg_params->accu_high_curr); |
13151631 AM |
1615 | ab8500_fg_coulomb_counter(di, true); |
1616 | ab8500_fg_discharge_state_to(di, | |
1617 | AB8500_FG_DISCHARGE_READOUT); | |
1618 | break; | |
1619 | ||
1620 | case AB8500_FG_DISCHARGE_READOUT: | |
1621 | di->inst_curr = ab8500_fg_inst_curr_blocking(di); | |
1622 | ||
1623 | if (ab8500_fg_is_low_curr(di, di->inst_curr)) { | |
1624 | /* Detect mode change */ | |
1625 | if (di->high_curr_mode) { | |
1626 | di->high_curr_mode = false; | |
1627 | di->high_curr_cnt = 0; | |
1628 | } | |
1629 | ||
1630 | if (di->recovery_needed) { | |
1631 | ab8500_fg_discharge_state_to(di, | |
ffaa39d9 | 1632 | AB8500_FG_DISCHARGE_INIT_RECOVERY); |
13151631 AM |
1633 | |
1634 | queue_delayed_work(di->fg_wq, | |
1635 | &di->fg_periodic_work, 0); | |
1636 | ||
1637 | break; | |
1638 | } | |
1639 | ||
1640 | ab8500_fg_calc_cap_discharge_voltage(di, true); | |
1641 | } else { | |
1642 | mutex_lock(&di->cc_lock); | |
1643 | if (!di->flags.conv_done) { | |
1644 | /* Wasn't the CC IRQ that got us here */ | |
1645 | mutex_unlock(&di->cc_lock); | |
1646 | dev_dbg(di->dev, "%s CC conv not done\n", | |
1647 | __func__); | |
1648 | ||
1649 | break; | |
1650 | } | |
1651 | di->flags.conv_done = false; | |
1652 | mutex_unlock(&di->cc_lock); | |
1653 | ||
1654 | /* Detect mode change */ | |
1655 | if (!di->high_curr_mode) { | |
1656 | di->high_curr_mode = true; | |
1657 | di->high_curr_cnt = 0; | |
1658 | } | |
1659 | ||
1660 | di->high_curr_cnt += | |
b0284de0 | 1661 | di->bm->fg_params->accu_high_curr; |
13151631 | 1662 | if (di->high_curr_cnt > |
b0284de0 | 1663 | di->bm->fg_params->high_curr_time) |
13151631 AM |
1664 | di->recovery_needed = true; |
1665 | ||
1666 | ab8500_fg_calc_cap_discharge_fg(di); | |
1667 | } | |
1668 | ||
1669 | ab8500_fg_check_capacity_limits(di, false); | |
1670 | ||
1671 | break; | |
1672 | ||
1673 | case AB8500_FG_DISCHARGE_WAKEUP: | |
13151631 AM |
1674 | ab8500_fg_calc_cap_discharge_voltage(di, true); |
1675 | ||
1676 | di->fg_samples = SEC_TO_SAMPLE( | |
b0284de0 | 1677 | di->bm->fg_params->accu_high_curr); |
13151631 AM |
1678 | ab8500_fg_coulomb_counter(di, true); |
1679 | ab8500_fg_discharge_state_to(di, | |
1680 | AB8500_FG_DISCHARGE_READOUT); | |
1681 | ||
1682 | ab8500_fg_check_capacity_limits(di, false); | |
1683 | ||
1684 | break; | |
1685 | ||
1686 | default: | |
1687 | break; | |
1688 | } | |
1689 | } | |
1690 | ||
1691 | /** | |
1692 | * ab8500_fg_algorithm_calibrate() - Internal columb counter offset calibration | |
1693 | * @di: pointer to the ab8500_fg structure | |
1694 | * | |
1695 | */ | |
1696 | static void ab8500_fg_algorithm_calibrate(struct ab8500_fg *di) | |
1697 | { | |
1698 | int ret; | |
1699 | ||
1700 | switch (di->calib_state) { | |
1701 | case AB8500_FG_CALIB_INIT: | |
1702 | dev_dbg(di->dev, "Calibration ongoing...\n"); | |
1703 | ||
1704 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1705 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
1706 | CC_INT_CAL_N_AVG_MASK, CC_INT_CAL_SAMPLES_8); | |
1707 | if (ret < 0) | |
1708 | goto err; | |
1709 | ||
1710 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1711 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
1712 | CC_INTAVGOFFSET_ENA, CC_INTAVGOFFSET_ENA); | |
1713 | if (ret < 0) | |
1714 | goto err; | |
1715 | di->calib_state = AB8500_FG_CALIB_WAIT; | |
1716 | break; | |
1717 | case AB8500_FG_CALIB_END: | |
1718 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1719 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
1720 | CC_MUXOFFSET, CC_MUXOFFSET); | |
1721 | if (ret < 0) | |
1722 | goto err; | |
1723 | di->flags.calibrate = false; | |
1724 | dev_dbg(di->dev, "Calibration done...\n"); | |
1725 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
1726 | break; | |
1727 | case AB8500_FG_CALIB_WAIT: | |
1728 | dev_dbg(di->dev, "Calibration WFI\n"); | |
1729 | default: | |
1730 | break; | |
1731 | } | |
1732 | return; | |
1733 | err: | |
1734 | /* Something went wrong, don't calibrate then */ | |
1735 | dev_err(di->dev, "failed to calibrate the CC\n"); | |
1736 | di->flags.calibrate = false; | |
1737 | di->calib_state = AB8500_FG_CALIB_INIT; | |
1738 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
1739 | } | |
1740 | ||
1741 | /** | |
1742 | * ab8500_fg_algorithm() - Entry point for the FG algorithm | |
1743 | * @di: pointer to the ab8500_fg structure | |
1744 | * | |
1745 | * Entry point for the battery capacity calculation state machine | |
1746 | */ | |
1747 | static void ab8500_fg_algorithm(struct ab8500_fg *di) | |
1748 | { | |
1749 | if (di->flags.calibrate) | |
1750 | ab8500_fg_algorithm_calibrate(di); | |
1751 | else { | |
1752 | if (di->flags.charging) | |
1753 | ab8500_fg_algorithm_charging(di); | |
1754 | else | |
1755 | ab8500_fg_algorithm_discharging(di); | |
1756 | } | |
1757 | ||
64277618 | 1758 | dev_dbg(di->dev, "[FG_DATA] %d %d %d %d %d %d %d %d %d %d " |
13151631 AM |
1759 | "%d %d %d %d %d %d %d\n", |
1760 | di->bat_cap.max_mah_design, | |
64277618 | 1761 | di->bat_cap.max_mah, |
13151631 AM |
1762 | di->bat_cap.mah, |
1763 | di->bat_cap.permille, | |
1764 | di->bat_cap.level, | |
1765 | di->bat_cap.prev_mah, | |
1766 | di->bat_cap.prev_percent, | |
1767 | di->bat_cap.prev_level, | |
1768 | di->vbat, | |
1769 | di->inst_curr, | |
1770 | di->avg_curr, | |
1771 | di->accu_charge, | |
1772 | di->flags.charging, | |
1773 | di->charge_state, | |
1774 | di->discharge_state, | |
1775 | di->high_curr_mode, | |
1776 | di->recovery_needed); | |
1777 | } | |
1778 | ||
1779 | /** | |
1780 | * ab8500_fg_periodic_work() - Run the FG state machine periodically | |
1781 | * @work: pointer to the work_struct structure | |
1782 | * | |
1783 | * Work queue function for periodic work | |
1784 | */ | |
1785 | static void ab8500_fg_periodic_work(struct work_struct *work) | |
1786 | { | |
1787 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, | |
1788 | fg_periodic_work.work); | |
1789 | ||
1790 | if (di->init_capacity) { | |
13151631 AM |
1791 | /* Get an initial capacity calculation */ |
1792 | ab8500_fg_calc_cap_discharge_voltage(di, true); | |
1793 | ab8500_fg_check_capacity_limits(di, true); | |
1794 | di->init_capacity = false; | |
1795 | ||
1796 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
1797 | } else if (di->flags.user_cap) { | |
1798 | if (check_sysfs_capacity(di)) { | |
1799 | ab8500_fg_check_capacity_limits(di, true); | |
1800 | if (di->flags.charging) | |
1801 | ab8500_fg_charge_state_to(di, | |
1802 | AB8500_FG_CHARGE_INIT); | |
1803 | else | |
1804 | ab8500_fg_discharge_state_to(di, | |
1805 | AB8500_FG_DISCHARGE_READOUT_INIT); | |
1806 | } | |
1807 | di->flags.user_cap = false; | |
1808 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
1809 | } else | |
1810 | ab8500_fg_algorithm(di); | |
1811 | ||
1812 | } | |
1813 | ||
1814 | /** | |
1815 | * ab8500_fg_check_hw_failure_work() - Check OVV_BAT condition | |
1816 | * @work: pointer to the work_struct structure | |
1817 | * | |
1818 | * Work queue function for checking the OVV_BAT condition | |
1819 | */ | |
1820 | static void ab8500_fg_check_hw_failure_work(struct work_struct *work) | |
1821 | { | |
1822 | int ret; | |
1823 | u8 reg_value; | |
1824 | ||
1825 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, | |
1826 | fg_check_hw_failure_work.work); | |
1827 | ||
1828 | /* | |
1829 | * If we have had a battery over-voltage situation, | |
1830 | * check ovv-bit to see if it should be reset. | |
1831 | */ | |
8bcf3b39 HB |
1832 | ret = abx500_get_register_interruptible(di->dev, |
1833 | AB8500_CHARGER, AB8500_CH_STAT_REG, | |
1834 | ®_value); | |
1835 | if (ret < 0) { | |
1836 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
1837 | return; | |
1838 | } | |
1839 | if ((reg_value & BATT_OVV) == BATT_OVV) { | |
1840 | if (!di->flags.bat_ovv) { | |
1841 | dev_dbg(di->dev, "Battery OVV\n"); | |
1842 | di->flags.bat_ovv = true; | |
297d716f | 1843 | power_supply_changed(di->fg_psy); |
13151631 | 1844 | } |
13151631 AM |
1845 | /* Not yet recovered from ovv, reschedule this test */ |
1846 | queue_delayed_work(di->fg_wq, &di->fg_check_hw_failure_work, | |
41ce2565 | 1847 | HZ); |
8bcf3b39 HB |
1848 | } else { |
1849 | dev_dbg(di->dev, "Battery recovered from OVV\n"); | |
1850 | di->flags.bat_ovv = false; | |
297d716f | 1851 | power_supply_changed(di->fg_psy); |
13151631 AM |
1852 | } |
1853 | } | |
1854 | ||
1855 | /** | |
1856 | * ab8500_fg_low_bat_work() - Check LOW_BAT condition | |
1857 | * @work: pointer to the work_struct structure | |
1858 | * | |
1859 | * Work queue function for checking the LOW_BAT condition | |
1860 | */ | |
1861 | static void ab8500_fg_low_bat_work(struct work_struct *work) | |
1862 | { | |
1863 | int vbat; | |
1864 | ||
1865 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, | |
1866 | fg_low_bat_work.work); | |
1867 | ||
1868 | vbat = ab8500_fg_bat_voltage(di); | |
1869 | ||
1870 | /* Check if LOW_BAT still fulfilled */ | |
b0284de0 | 1871 | if (vbat < di->bm->fg_params->lowbat_threshold) { |
75f2a219 HB |
1872 | /* Is it time to shut down? */ |
1873 | if (di->low_bat_cnt < 1) { | |
1874 | di->flags.low_bat = true; | |
1875 | dev_warn(di->dev, "Shut down pending...\n"); | |
1876 | } else { | |
1877 | /* | |
1878 | * Else we need to re-schedule this check to be able to detect | |
1879 | * if the voltage increases again during charging or | |
1880 | * due to decreasing load. | |
1881 | */ | |
1882 | di->low_bat_cnt--; | |
1883 | dev_warn(di->dev, "Battery voltage still LOW\n"); | |
1884 | queue_delayed_work(di->fg_wq, &di->fg_low_bat_work, | |
1885 | round_jiffies(LOW_BAT_CHECK_INTERVAL)); | |
1886 | } | |
13151631 | 1887 | } else { |
75f2a219 HB |
1888 | di->flags.low_bat_delay = false; |
1889 | di->low_bat_cnt = 10; | |
13151631 AM |
1890 | dev_warn(di->dev, "Battery voltage OK again\n"); |
1891 | } | |
1892 | ||
1893 | /* This is needed to dispatch LOW_BAT */ | |
1894 | ab8500_fg_check_capacity_limits(di, false); | |
13151631 AM |
1895 | } |
1896 | ||
1897 | /** | |
1898 | * ab8500_fg_battok_calc - calculate the bit pattern corresponding | |
1899 | * to the target voltage. | |
1900 | * @di: pointer to the ab8500_fg structure | |
32c52eff | 1901 | * @target: target voltage |
13151631 AM |
1902 | * |
1903 | * Returns bit pattern closest to the target voltage | |
1904 | * valid return values are 0-14. (0-BATT_OK_MAX_NR_INCREMENTS) | |
1905 | */ | |
1906 | ||
1907 | static int ab8500_fg_battok_calc(struct ab8500_fg *di, int target) | |
1908 | { | |
1909 | if (target > BATT_OK_MIN + | |
1910 | (BATT_OK_INCREMENT * BATT_OK_MAX_NR_INCREMENTS)) | |
1911 | return BATT_OK_MAX_NR_INCREMENTS; | |
1912 | if (target < BATT_OK_MIN) | |
1913 | return 0; | |
1914 | return (target - BATT_OK_MIN) / BATT_OK_INCREMENT; | |
1915 | } | |
1916 | ||
1917 | /** | |
1918 | * ab8500_fg_battok_init_hw_register - init battok levels | |
1919 | * @di: pointer to the ab8500_fg structure | |
1920 | * | |
1921 | */ | |
1922 | ||
1923 | static int ab8500_fg_battok_init_hw_register(struct ab8500_fg *di) | |
1924 | { | |
1925 | int selected; | |
1926 | int sel0; | |
1927 | int sel1; | |
1928 | int cbp_sel0; | |
1929 | int cbp_sel1; | |
1930 | int ret; | |
1931 | int new_val; | |
1932 | ||
b0284de0 LJ |
1933 | sel0 = di->bm->fg_params->battok_falling_th_sel0; |
1934 | sel1 = di->bm->fg_params->battok_raising_th_sel1; | |
13151631 AM |
1935 | |
1936 | cbp_sel0 = ab8500_fg_battok_calc(di, sel0); | |
1937 | cbp_sel1 = ab8500_fg_battok_calc(di, sel1); | |
1938 | ||
1939 | selected = BATT_OK_MIN + cbp_sel0 * BATT_OK_INCREMENT; | |
1940 | ||
1941 | if (selected != sel0) | |
1942 | dev_warn(di->dev, "Invalid voltage step:%d, using %d %d\n", | |
1943 | sel0, selected, cbp_sel0); | |
1944 | ||
1945 | selected = BATT_OK_MIN + cbp_sel1 * BATT_OK_INCREMENT; | |
1946 | ||
1947 | if (selected != sel1) | |
1948 | dev_warn(di->dev, "Invalid voltage step:%d, using %d %d\n", | |
1949 | sel1, selected, cbp_sel1); | |
1950 | ||
1951 | new_val = cbp_sel0 | (cbp_sel1 << 4); | |
1952 | ||
1953 | dev_dbg(di->dev, "using: %x %d %d\n", new_val, cbp_sel0, cbp_sel1); | |
1954 | ret = abx500_set_register_interruptible(di->dev, AB8500_SYS_CTRL2_BLOCK, | |
1955 | AB8500_BATT_OK_REG, new_val); | |
1956 | return ret; | |
1957 | } | |
1958 | ||
1959 | /** | |
1960 | * ab8500_fg_instant_work() - Run the FG state machine instantly | |
1961 | * @work: pointer to the work_struct structure | |
1962 | * | |
1963 | * Work queue function for instant work | |
1964 | */ | |
1965 | static void ab8500_fg_instant_work(struct work_struct *work) | |
1966 | { | |
1967 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, fg_work); | |
1968 | ||
1969 | ab8500_fg_algorithm(di); | |
1970 | } | |
1971 | ||
1972 | /** | |
7a2cf9ba | 1973 | * ab8500_fg_cc_data_end_handler() - end of data conversion isr. |
13151631 AM |
1974 | * @irq: interrupt number |
1975 | * @_di: pointer to the ab8500_fg structure | |
1976 | * | |
1977 | * Returns IRQ status(IRQ_HANDLED) | |
1978 | */ | |
1979 | static irqreturn_t ab8500_fg_cc_data_end_handler(int irq, void *_di) | |
1980 | { | |
1981 | struct ab8500_fg *di = _di; | |
3988a4df JB |
1982 | if (!di->nbr_cceoc_irq_cnt) { |
1983 | di->nbr_cceoc_irq_cnt++; | |
1984 | complete(&di->ab8500_fg_started); | |
1985 | } else { | |
1986 | di->nbr_cceoc_irq_cnt = 0; | |
1987 | complete(&di->ab8500_fg_complete); | |
1988 | } | |
13151631 AM |
1989 | return IRQ_HANDLED; |
1990 | } | |
1991 | ||
1992 | /** | |
7a2cf9ba | 1993 | * ab8500_fg_cc_int_calib_handler () - end of calibration isr. |
13151631 AM |
1994 | * @irq: interrupt number |
1995 | * @_di: pointer to the ab8500_fg structure | |
1996 | * | |
1997 | * Returns IRQ status(IRQ_HANDLED) | |
1998 | */ | |
1999 | static irqreturn_t ab8500_fg_cc_int_calib_handler(int irq, void *_di) | |
2000 | { | |
2001 | struct ab8500_fg *di = _di; | |
2002 | di->calib_state = AB8500_FG_CALIB_END; | |
2003 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
2004 | return IRQ_HANDLED; | |
2005 | } | |
2006 | ||
2007 | /** | |
2008 | * ab8500_fg_cc_convend_handler() - isr to get battery avg current. | |
2009 | * @irq: interrupt number | |
2010 | * @_di: pointer to the ab8500_fg structure | |
2011 | * | |
2012 | * Returns IRQ status(IRQ_HANDLED) | |
2013 | */ | |
2014 | static irqreturn_t ab8500_fg_cc_convend_handler(int irq, void *_di) | |
2015 | { | |
2016 | struct ab8500_fg *di = _di; | |
2017 | ||
2018 | queue_work(di->fg_wq, &di->fg_acc_cur_work); | |
2019 | ||
2020 | return IRQ_HANDLED; | |
2021 | } | |
2022 | ||
2023 | /** | |
2024 | * ab8500_fg_batt_ovv_handler() - Battery OVV occured | |
2025 | * @irq: interrupt number | |
2026 | * @_di: pointer to the ab8500_fg structure | |
2027 | * | |
2028 | * Returns IRQ status(IRQ_HANDLED) | |
2029 | */ | |
2030 | static irqreturn_t ab8500_fg_batt_ovv_handler(int irq, void *_di) | |
2031 | { | |
2032 | struct ab8500_fg *di = _di; | |
2033 | ||
2034 | dev_dbg(di->dev, "Battery OVV\n"); | |
13151631 AM |
2035 | |
2036 | /* Schedule a new HW failure check */ | |
2037 | queue_delayed_work(di->fg_wq, &di->fg_check_hw_failure_work, 0); | |
2038 | ||
2039 | return IRQ_HANDLED; | |
2040 | } | |
2041 | ||
2042 | /** | |
2043 | * ab8500_fg_lowbatf_handler() - Battery voltage is below LOW threshold | |
2044 | * @irq: interrupt number | |
2045 | * @_di: pointer to the ab8500_fg structure | |
2046 | * | |
2047 | * Returns IRQ status(IRQ_HANDLED) | |
2048 | */ | |
2049 | static irqreturn_t ab8500_fg_lowbatf_handler(int irq, void *_di) | |
2050 | { | |
2051 | struct ab8500_fg *di = _di; | |
2052 | ||
75f2a219 | 2053 | /* Initiate handling in ab8500_fg_low_bat_work() if not already initiated. */ |
13151631 AM |
2054 | if (!di->flags.low_bat_delay) { |
2055 | dev_warn(di->dev, "Battery voltage is below LOW threshold\n"); | |
2056 | di->flags.low_bat_delay = true; | |
2057 | /* | |
2058 | * Start a timer to check LOW_BAT again after some time | |
2059 | * This is done to avoid shutdown on single voltage dips | |
2060 | */ | |
2061 | queue_delayed_work(di->fg_wq, &di->fg_low_bat_work, | |
2062 | round_jiffies(LOW_BAT_CHECK_INTERVAL)); | |
2063 | } | |
2064 | return IRQ_HANDLED; | |
2065 | } | |
2066 | ||
2067 | /** | |
2068 | * ab8500_fg_get_property() - get the fg properties | |
2069 | * @psy: pointer to the power_supply structure | |
2070 | * @psp: pointer to the power_supply_property structure | |
2071 | * @val: pointer to the power_supply_propval union | |
2072 | * | |
2073 | * This function gets called when an application tries to get the | |
2074 | * fg properties by reading the sysfs files. | |
2075 | * voltage_now: battery voltage | |
2076 | * current_now: battery instant current | |
2077 | * current_avg: battery average current | |
2078 | * charge_full_design: capacity where battery is considered full | |
2079 | * charge_now: battery capacity in nAh | |
2080 | * capacity: capacity in percent | |
2081 | * capacity_level: capacity level | |
2082 | * | |
2083 | * Returns error code in case of failure else 0 on success | |
2084 | */ | |
2085 | static int ab8500_fg_get_property(struct power_supply *psy, | |
2086 | enum power_supply_property psp, | |
2087 | union power_supply_propval *val) | |
2088 | { | |
297d716f | 2089 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
13151631 AM |
2090 | |
2091 | /* | |
2092 | * If battery is identified as unknown and charging of unknown | |
2093 | * batteries is disabled, we always report 100% capacity and | |
2094 | * capacity level UNKNOWN, since we can't calculate | |
2095 | * remaining capacity | |
2096 | */ | |
2097 | ||
2098 | switch (psp) { | |
2099 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
2100 | if (di->flags.bat_ovv) | |
2101 | val->intval = BATT_OVV_VALUE * 1000; | |
2102 | else | |
2103 | val->intval = di->vbat * 1000; | |
2104 | break; | |
2105 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
2106 | val->intval = di->inst_curr * 1000; | |
2107 | break; | |
2108 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
2109 | val->intval = di->avg_curr * 1000; | |
2110 | break; | |
2111 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
2112 | val->intval = ab8500_fg_convert_mah_to_uwh(di, | |
2113 | di->bat_cap.max_mah_design); | |
2114 | break; | |
2115 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
2116 | val->intval = ab8500_fg_convert_mah_to_uwh(di, | |
2117 | di->bat_cap.max_mah); | |
2118 | break; | |
2119 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
b0284de0 | 2120 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
13151631 AM |
2121 | di->flags.batt_id_received) |
2122 | val->intval = ab8500_fg_convert_mah_to_uwh(di, | |
2123 | di->bat_cap.max_mah); | |
2124 | else | |
2125 | val->intval = ab8500_fg_convert_mah_to_uwh(di, | |
2126 | di->bat_cap.prev_mah); | |
2127 | break; | |
2128 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
2129 | val->intval = di->bat_cap.max_mah_design; | |
2130 | break; | |
2131 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
2132 | val->intval = di->bat_cap.max_mah; | |
2133 | break; | |
2134 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
b0284de0 | 2135 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
13151631 AM |
2136 | di->flags.batt_id_received) |
2137 | val->intval = di->bat_cap.max_mah; | |
2138 | else | |
2139 | val->intval = di->bat_cap.prev_mah; | |
2140 | break; | |
2141 | case POWER_SUPPLY_PROP_CAPACITY: | |
e82c5bdb | 2142 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
13151631 AM |
2143 | di->flags.batt_id_received) |
2144 | val->intval = 100; | |
2145 | else | |
2146 | val->intval = di->bat_cap.prev_percent; | |
2147 | break; | |
2148 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: | |
b0284de0 | 2149 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
13151631 AM |
2150 | di->flags.batt_id_received) |
2151 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN; | |
2152 | else | |
2153 | val->intval = di->bat_cap.prev_level; | |
2154 | break; | |
2155 | default: | |
2156 | return -EINVAL; | |
2157 | } | |
2158 | return 0; | |
2159 | } | |
2160 | ||
2161 | static int ab8500_fg_get_ext_psy_data(struct device *dev, void *data) | |
2162 | { | |
2163 | struct power_supply *psy; | |
ea32cea1 AS |
2164 | struct power_supply *ext = dev_get_drvdata(dev); |
2165 | const char **supplicants = (const char **)ext->supplied_to; | |
13151631 AM |
2166 | struct ab8500_fg *di; |
2167 | union power_supply_propval ret; | |
ea32cea1 | 2168 | int j; |
13151631 AM |
2169 | |
2170 | psy = (struct power_supply *)data; | |
297d716f | 2171 | di = power_supply_get_drvdata(psy); |
13151631 AM |
2172 | |
2173 | /* | |
2174 | * For all psy where the name of your driver | |
2175 | * appears in any supplied_to | |
2176 | */ | |
ea32cea1 AS |
2177 | j = match_string(supplicants, ext->num_supplicants, psy->desc->name); |
2178 | if (j < 0) | |
13151631 AM |
2179 | return 0; |
2180 | ||
2181 | /* Go through all properties for the psy */ | |
297d716f | 2182 | for (j = 0; j < ext->desc->num_properties; j++) { |
13151631 | 2183 | enum power_supply_property prop; |
297d716f | 2184 | prop = ext->desc->properties[j]; |
13151631 | 2185 | |
15077fc1 | 2186 | if (power_supply_get_property(ext, prop, &ret)) |
13151631 AM |
2187 | continue; |
2188 | ||
2189 | switch (prop) { | |
2190 | case POWER_SUPPLY_PROP_STATUS: | |
297d716f | 2191 | switch (ext->desc->type) { |
13151631 AM |
2192 | case POWER_SUPPLY_TYPE_BATTERY: |
2193 | switch (ret.intval) { | |
2194 | case POWER_SUPPLY_STATUS_UNKNOWN: | |
2195 | case POWER_SUPPLY_STATUS_DISCHARGING: | |
2196 | case POWER_SUPPLY_STATUS_NOT_CHARGING: | |
2197 | if (!di->flags.charging) | |
2198 | break; | |
2199 | di->flags.charging = false; | |
2200 | di->flags.fully_charged = false; | |
ea402401 MC |
2201 | if (di->bm->capacity_scaling) |
2202 | ab8500_fg_update_cap_scalers(di); | |
13151631 AM |
2203 | queue_work(di->fg_wq, &di->fg_work); |
2204 | break; | |
2205 | case POWER_SUPPLY_STATUS_FULL: | |
2206 | if (di->flags.fully_charged) | |
2207 | break; | |
2208 | di->flags.fully_charged = true; | |
2209 | di->flags.force_full = true; | |
2210 | /* Save current capacity as maximum */ | |
2211 | di->bat_cap.max_mah = di->bat_cap.mah; | |
2212 | queue_work(di->fg_wq, &di->fg_work); | |
2213 | break; | |
2214 | case POWER_SUPPLY_STATUS_CHARGING: | |
ea402401 MC |
2215 | if (di->flags.charging && |
2216 | !di->flags.fully_charged) | |
13151631 AM |
2217 | break; |
2218 | di->flags.charging = true; | |
2219 | di->flags.fully_charged = false; | |
ea402401 MC |
2220 | if (di->bm->capacity_scaling) |
2221 | ab8500_fg_update_cap_scalers(di); | |
13151631 AM |
2222 | queue_work(di->fg_wq, &di->fg_work); |
2223 | break; | |
c6ef5234 | 2224 | } |
13151631 AM |
2225 | default: |
2226 | break; | |
c6ef5234 | 2227 | } |
13151631 AM |
2228 | break; |
2229 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
297d716f | 2230 | switch (ext->desc->type) { |
13151631 | 2231 | case POWER_SUPPLY_TYPE_BATTERY: |
1a793a10 RK |
2232 | if (!di->flags.batt_id_received && |
2233 | di->bm->batt_id != BATTERY_UNKNOWN) { | |
c34a61b4 AV |
2234 | const struct abx500_battery_type *b; |
2235 | ||
b0284de0 | 2236 | b = &(di->bm->bat_type[di->bm->batt_id]); |
13151631 AM |
2237 | |
2238 | di->flags.batt_id_received = true; | |
2239 | ||
2240 | di->bat_cap.max_mah_design = | |
2241 | MILLI_TO_MICRO * | |
2242 | b->charge_full_design; | |
2243 | ||
2244 | di->bat_cap.max_mah = | |
2245 | di->bat_cap.max_mah_design; | |
2246 | ||
2247 | di->vbat_nom = b->nominal_voltage; | |
2248 | } | |
2249 | ||
2250 | if (ret.intval) | |
2251 | di->flags.batt_unknown = false; | |
2252 | else | |
2253 | di->flags.batt_unknown = true; | |
2254 | break; | |
2255 | default: | |
2256 | break; | |
2257 | } | |
2258 | break; | |
2259 | case POWER_SUPPLY_PROP_TEMP: | |
297d716f | 2260 | switch (ext->desc->type) { |
13151631 | 2261 | case POWER_SUPPLY_TYPE_BATTERY: |
ea402401 MC |
2262 | if (di->flags.batt_id_received) |
2263 | di->bat_temp = ret.intval; | |
13151631 AM |
2264 | break; |
2265 | default: | |
2266 | break; | |
2267 | } | |
2268 | break; | |
2269 | default: | |
2270 | break; | |
2271 | } | |
2272 | } | |
2273 | return 0; | |
2274 | } | |
2275 | ||
2276 | /** | |
2277 | * ab8500_fg_init_hw_registers() - Set up FG related registers | |
2278 | * @di: pointer to the ab8500_fg structure | |
2279 | * | |
2280 | * Set up battery OVV, low battery voltage registers | |
2281 | */ | |
2282 | static int ab8500_fg_init_hw_registers(struct ab8500_fg *di) | |
2283 | { | |
2284 | int ret; | |
2285 | ||
2286 | /* Set VBAT OVV threshold */ | |
2287 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
2288 | AB8500_CHARGER, | |
2289 | AB8500_BATT_OVV, | |
2290 | BATT_OVV_TH_4P75, | |
2291 | BATT_OVV_TH_4P75); | |
2292 | if (ret) { | |
2293 | dev_err(di->dev, "failed to set BATT_OVV\n"); | |
2294 | goto out; | |
2295 | } | |
2296 | ||
2297 | /* Enable VBAT OVV detection */ | |
2298 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
2299 | AB8500_CHARGER, | |
2300 | AB8500_BATT_OVV, | |
2301 | BATT_OVV_ENA, | |
2302 | BATT_OVV_ENA); | |
2303 | if (ret) { | |
2304 | dev_err(di->dev, "failed to enable BATT_OVV\n"); | |
2305 | goto out; | |
2306 | } | |
2307 | ||
2308 | /* Low Battery Voltage */ | |
2309 | ret = abx500_set_register_interruptible(di->dev, | |
2310 | AB8500_SYS_CTRL2_BLOCK, | |
2311 | AB8500_LOW_BAT_REG, | |
2312 | ab8500_volt_to_regval( | |
b0284de0 | 2313 | di->bm->fg_params->lowbat_threshold) << 1 | |
13151631 AM |
2314 | LOW_BAT_ENABLE); |
2315 | if (ret) { | |
2316 | dev_err(di->dev, "%s write failed\n", __func__); | |
2317 | goto out; | |
2318 | } | |
2319 | ||
2320 | /* Battery OK threshold */ | |
2321 | ret = ab8500_fg_battok_init_hw_register(di); | |
2322 | if (ret) { | |
2323 | dev_err(di->dev, "BattOk init write failed.\n"); | |
2324 | goto out; | |
2325 | } | |
93ff722e | 2326 | |
4c4268dc | 2327 | if (is_ab8505(di->parent)) { |
93ff722e LJ |
2328 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, |
2329 | AB8505_RTC_PCUT_MAX_TIME_REG, di->bm->fg_params->pcut_max_time); | |
2330 | ||
2331 | if (ret) { | |
2332 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_MAX_TIME_REG\n", __func__); | |
2333 | goto out; | |
c6ef5234 | 2334 | } |
93ff722e LJ |
2335 | |
2336 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2337 | AB8505_RTC_PCUT_FLAG_TIME_REG, di->bm->fg_params->pcut_flag_time); | |
2338 | ||
2339 | if (ret) { | |
2340 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_FLAG_TIME_REG\n", __func__); | |
2341 | goto out; | |
c6ef5234 | 2342 | } |
93ff722e LJ |
2343 | |
2344 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2345 | AB8505_RTC_PCUT_RESTART_REG, di->bm->fg_params->pcut_max_restart); | |
2346 | ||
2347 | if (ret) { | |
2348 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_RESTART_REG\n", __func__); | |
2349 | goto out; | |
c6ef5234 | 2350 | } |
93ff722e LJ |
2351 | |
2352 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2353 | AB8505_RTC_PCUT_DEBOUNCE_REG, di->bm->fg_params->pcut_debounce_time); | |
2354 | ||
2355 | if (ret) { | |
2356 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_DEBOUNCE_REG\n", __func__); | |
2357 | goto out; | |
c6ef5234 | 2358 | } |
93ff722e LJ |
2359 | |
2360 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2361 | AB8505_RTC_PCUT_CTL_STATUS_REG, di->bm->fg_params->pcut_enable); | |
2362 | ||
2363 | if (ret) { | |
2364 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_CTL_STATUS_REG\n", __func__); | |
2365 | goto out; | |
c6ef5234 | 2366 | } |
93ff722e | 2367 | } |
13151631 AM |
2368 | out: |
2369 | return ret; | |
2370 | } | |
2371 | ||
2372 | /** | |
2373 | * ab8500_fg_external_power_changed() - callback for power supply changes | |
2374 | * @psy: pointer to the structure power_supply | |
2375 | * | |
2376 | * This function is the entry point of the pointer external_power_changed | |
2377 | * of the structure power_supply. | |
2378 | * This function gets executed when there is a change in any external power | |
2379 | * supply that this driver needs to be notified of. | |
2380 | */ | |
2381 | static void ab8500_fg_external_power_changed(struct power_supply *psy) | |
2382 | { | |
297d716f | 2383 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
13151631 AM |
2384 | |
2385 | class_for_each_device(power_supply_class, NULL, | |
297d716f | 2386 | di->fg_psy, ab8500_fg_get_ext_psy_data); |
13151631 AM |
2387 | } |
2388 | ||
2389 | /** | |
32c52eff | 2390 | * ab8500_fg_reinit_work() - work to reset the FG algorithm |
13151631 AM |
2391 | * @work: pointer to the work_struct structure |
2392 | * | |
2393 | * Used to reset the current battery capacity to be able to | |
2394 | * retrigger a new voltage base capacity calculation. For | |
2395 | * test and verification purpose. | |
2396 | */ | |
2397 | static void ab8500_fg_reinit_work(struct work_struct *work) | |
2398 | { | |
2399 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, | |
2400 | fg_reinit_work.work); | |
2401 | ||
ddd86c95 | 2402 | if (!di->flags.calibrate) { |
13151631 AM |
2403 | dev_dbg(di->dev, "Resetting FG state machine to init.\n"); |
2404 | ab8500_fg_clear_cap_samples(di); | |
2405 | ab8500_fg_calc_cap_discharge_voltage(di, true); | |
2406 | ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT); | |
2407 | ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_INIT); | |
2408 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
2409 | ||
2410 | } else { | |
2411 | dev_err(di->dev, "Residual offset calibration ongoing " | |
2412 | "retrying..\n"); | |
2413 | /* Wait one second until next try*/ | |
2414 | queue_delayed_work(di->fg_wq, &di->fg_reinit_work, | |
2415 | round_jiffies(1)); | |
2416 | } | |
2417 | } | |
2418 | ||
13151631 AM |
2419 | /* Exposure to the sysfs interface */ |
2420 | ||
2421 | struct ab8500_fg_sysfs_entry { | |
2422 | struct attribute attr; | |
2423 | ssize_t (*show)(struct ab8500_fg *, char *); | |
2424 | ssize_t (*store)(struct ab8500_fg *, const char *, size_t); | |
2425 | }; | |
2426 | ||
2427 | static ssize_t charge_full_show(struct ab8500_fg *di, char *buf) | |
2428 | { | |
2429 | return sprintf(buf, "%d\n", di->bat_cap.max_mah); | |
2430 | } | |
2431 | ||
2432 | static ssize_t charge_full_store(struct ab8500_fg *di, const char *buf, | |
2433 | size_t count) | |
2434 | { | |
2435 | unsigned long charge_full; | |
54baff8d | 2436 | int ret; |
13151631 | 2437 | |
4b43eb67 | 2438 | ret = kstrtoul(buf, 10, &charge_full); |
54baff8d DC |
2439 | if (ret) |
2440 | return ret; | |
13151631 | 2441 | |
54baff8d DC |
2442 | di->bat_cap.max_mah = (int) charge_full; |
2443 | return count; | |
13151631 AM |
2444 | } |
2445 | ||
2446 | static ssize_t charge_now_show(struct ab8500_fg *di, char *buf) | |
2447 | { | |
2448 | return sprintf(buf, "%d\n", di->bat_cap.prev_mah); | |
2449 | } | |
2450 | ||
2451 | static ssize_t charge_now_store(struct ab8500_fg *di, const char *buf, | |
2452 | size_t count) | |
2453 | { | |
2454 | unsigned long charge_now; | |
54baff8d | 2455 | int ret; |
13151631 | 2456 | |
4b43eb67 | 2457 | ret = kstrtoul(buf, 10, &charge_now); |
54baff8d DC |
2458 | if (ret) |
2459 | return ret; | |
13151631 | 2460 | |
54baff8d DC |
2461 | di->bat_cap.user_mah = (int) charge_now; |
2462 | di->flags.user_cap = true; | |
2463 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
2464 | return count; | |
13151631 AM |
2465 | } |
2466 | ||
2467 | static struct ab8500_fg_sysfs_entry charge_full_attr = | |
2468 | __ATTR(charge_full, 0644, charge_full_show, charge_full_store); | |
2469 | ||
2470 | static struct ab8500_fg_sysfs_entry charge_now_attr = | |
2471 | __ATTR(charge_now, 0644, charge_now_show, charge_now_store); | |
2472 | ||
2473 | static ssize_t | |
2474 | ab8500_fg_show(struct kobject *kobj, struct attribute *attr, char *buf) | |
2475 | { | |
2476 | struct ab8500_fg_sysfs_entry *entry; | |
2477 | struct ab8500_fg *di; | |
2478 | ||
2479 | entry = container_of(attr, struct ab8500_fg_sysfs_entry, attr); | |
2480 | di = container_of(kobj, struct ab8500_fg, fg_kobject); | |
2481 | ||
2482 | if (!entry->show) | |
2483 | return -EIO; | |
2484 | ||
2485 | return entry->show(di, buf); | |
2486 | } | |
2487 | static ssize_t | |
2488 | ab8500_fg_store(struct kobject *kobj, struct attribute *attr, const char *buf, | |
2489 | size_t count) | |
2490 | { | |
2491 | struct ab8500_fg_sysfs_entry *entry; | |
2492 | struct ab8500_fg *di; | |
2493 | ||
2494 | entry = container_of(attr, struct ab8500_fg_sysfs_entry, attr); | |
2495 | di = container_of(kobj, struct ab8500_fg, fg_kobject); | |
2496 | ||
2497 | if (!entry->store) | |
2498 | return -EIO; | |
2499 | ||
2500 | return entry->store(di, buf, count); | |
2501 | } | |
2502 | ||
64eb9b02 | 2503 | static const struct sysfs_ops ab8500_fg_sysfs_ops = { |
13151631 AM |
2504 | .show = ab8500_fg_show, |
2505 | .store = ab8500_fg_store, | |
2506 | }; | |
2507 | ||
2508 | static struct attribute *ab8500_fg_attrs[] = { | |
2509 | &charge_full_attr.attr, | |
2510 | &charge_now_attr.attr, | |
2511 | NULL, | |
2512 | }; | |
2513 | ||
2514 | static struct kobj_type ab8500_fg_ktype = { | |
2515 | .sysfs_ops = &ab8500_fg_sysfs_ops, | |
2516 | .default_attrs = ab8500_fg_attrs, | |
2517 | }; | |
2518 | ||
2519 | /** | |
32c52eff | 2520 | * ab8500_fg_sysfs_exit() - de-init of sysfs entry |
13151631 AM |
2521 | * @di: pointer to the struct ab8500_chargalg |
2522 | * | |
2523 | * This function removes the entry in sysfs. | |
2524 | */ | |
2525 | static void ab8500_fg_sysfs_exit(struct ab8500_fg *di) | |
2526 | { | |
2527 | kobject_del(&di->fg_kobject); | |
2528 | } | |
2529 | ||
2530 | /** | |
32c52eff | 2531 | * ab8500_fg_sysfs_init() - init of sysfs entry |
13151631 AM |
2532 | * @di: pointer to the struct ab8500_chargalg |
2533 | * | |
2534 | * This function adds an entry in sysfs. | |
2535 | * Returns error code in case of failure else 0(on success) | |
2536 | */ | |
2537 | static int ab8500_fg_sysfs_init(struct ab8500_fg *di) | |
2538 | { | |
2539 | int ret = 0; | |
2540 | ||
2541 | ret = kobject_init_and_add(&di->fg_kobject, | |
2542 | &ab8500_fg_ktype, | |
2543 | NULL, "battery"); | |
2544 | if (ret < 0) | |
2545 | dev_err(di->dev, "failed to create sysfs entry\n"); | |
2546 | ||
2547 | return ret; | |
2548 | } | |
93ff722e LJ |
2549 | |
2550 | static ssize_t ab8505_powercut_flagtime_read(struct device *dev, | |
2551 | struct device_attribute *attr, | |
2552 | char *buf) | |
2553 | { | |
2554 | int ret; | |
2555 | u8 reg_value; | |
2556 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2557 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2558 | |
2559 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2560 | AB8505_RTC_PCUT_FLAG_TIME_REG, ®_value); | |
2561 | ||
2562 | if (ret < 0) { | |
2563 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_FLAG_TIME_REG\n"); | |
2564 | goto fail; | |
2565 | } | |
2566 | ||
2567 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F)); | |
2568 | ||
2569 | fail: | |
2570 | return ret; | |
2571 | } | |
2572 | ||
2573 | static ssize_t ab8505_powercut_flagtime_write(struct device *dev, | |
2574 | struct device_attribute *attr, | |
2575 | const char *buf, size_t count) | |
2576 | { | |
2577 | int ret; | |
b00b04aa | 2578 | int reg_value; |
93ff722e | 2579 | struct power_supply *psy = dev_get_drvdata(dev); |
297d716f | 2580 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e | 2581 | |
b00b04aa DX |
2582 | if (kstrtoint(buf, 10, ®_value)) |
2583 | goto fail; | |
93ff722e LJ |
2584 | |
2585 | if (reg_value > 0x7F) { | |
2586 | dev_err(dev, "Incorrect parameter, echo 0 (1.98s) - 127 (15.625ms) for flagtime\n"); | |
2587 | goto fail; | |
2588 | } | |
2589 | ||
2590 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2591 | AB8505_RTC_PCUT_FLAG_TIME_REG, (u8)reg_value); | |
2592 | ||
2593 | if (ret < 0) | |
2594 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_FLAG_TIME_REG\n"); | |
2595 | ||
2596 | fail: | |
2597 | return count; | |
2598 | } | |
2599 | ||
2600 | static ssize_t ab8505_powercut_maxtime_read(struct device *dev, | |
2601 | struct device_attribute *attr, | |
2602 | char *buf) | |
2603 | { | |
2604 | int ret; | |
2605 | u8 reg_value; | |
2606 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2607 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2608 | |
2609 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2610 | AB8505_RTC_PCUT_MAX_TIME_REG, ®_value); | |
2611 | ||
2612 | if (ret < 0) { | |
2613 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_MAX_TIME_REG\n"); | |
2614 | goto fail; | |
2615 | } | |
2616 | ||
2617 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F)); | |
2618 | ||
2619 | fail: | |
2620 | return ret; | |
2621 | ||
2622 | } | |
2623 | ||
2624 | static ssize_t ab8505_powercut_maxtime_write(struct device *dev, | |
2625 | struct device_attribute *attr, | |
2626 | const char *buf, size_t count) | |
2627 | { | |
2628 | int ret; | |
2629 | int reg_value; | |
2630 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2631 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e | 2632 | |
b00b04aa DX |
2633 | if (kstrtoint(buf, 10, ®_value)) |
2634 | goto fail; | |
2635 | ||
93ff722e LJ |
2636 | if (reg_value > 0x7F) { |
2637 | dev_err(dev, "Incorrect parameter, echo 0 (0.0s) - 127 (1.98s) for maxtime\n"); | |
2638 | goto fail; | |
2639 | } | |
2640 | ||
2641 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2642 | AB8505_RTC_PCUT_MAX_TIME_REG, (u8)reg_value); | |
2643 | ||
2644 | if (ret < 0) | |
2645 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_MAX_TIME_REG\n"); | |
2646 | ||
2647 | fail: | |
2648 | return count; | |
2649 | } | |
2650 | ||
2651 | static ssize_t ab8505_powercut_restart_read(struct device *dev, | |
2652 | struct device_attribute *attr, | |
2653 | char *buf) | |
2654 | { | |
2655 | int ret; | |
2656 | u8 reg_value; | |
2657 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2658 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2659 | |
2660 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2661 | AB8505_RTC_PCUT_RESTART_REG, ®_value); | |
2662 | ||
2663 | if (ret < 0) { | |
2664 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_RESTART_REG\n"); | |
2665 | goto fail; | |
2666 | } | |
2667 | ||
2668 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0xF)); | |
2669 | ||
2670 | fail: | |
2671 | return ret; | |
2672 | } | |
2673 | ||
2674 | static ssize_t ab8505_powercut_restart_write(struct device *dev, | |
2675 | struct device_attribute *attr, | |
2676 | const char *buf, size_t count) | |
2677 | { | |
2678 | int ret; | |
2679 | int reg_value; | |
2680 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2681 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e | 2682 | |
b00b04aa DX |
2683 | if (kstrtoint(buf, 10, ®_value)) |
2684 | goto fail; | |
2685 | ||
93ff722e LJ |
2686 | if (reg_value > 0xF) { |
2687 | dev_err(dev, "Incorrect parameter, echo 0 - 15 for number of restart\n"); | |
2688 | goto fail; | |
2689 | } | |
2690 | ||
2691 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2692 | AB8505_RTC_PCUT_RESTART_REG, (u8)reg_value); | |
2693 | ||
2694 | if (ret < 0) | |
2695 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_RESTART_REG\n"); | |
2696 | ||
2697 | fail: | |
2698 | return count; | |
2699 | ||
2700 | } | |
2701 | ||
2702 | static ssize_t ab8505_powercut_timer_read(struct device *dev, | |
2703 | struct device_attribute *attr, | |
2704 | char *buf) | |
2705 | { | |
2706 | int ret; | |
2707 | u8 reg_value; | |
2708 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2709 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2710 | |
2711 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2712 | AB8505_RTC_PCUT_TIME_REG, ®_value); | |
2713 | ||
2714 | if (ret < 0) { | |
2715 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_TIME_REG\n"); | |
2716 | goto fail; | |
2717 | } | |
2718 | ||
2719 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F)); | |
2720 | ||
2721 | fail: | |
2722 | return ret; | |
2723 | } | |
2724 | ||
2725 | static ssize_t ab8505_powercut_restart_counter_read(struct device *dev, | |
2726 | struct device_attribute *attr, | |
2727 | char *buf) | |
2728 | { | |
2729 | int ret; | |
2730 | u8 reg_value; | |
2731 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2732 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2733 | |
2734 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2735 | AB8505_RTC_PCUT_RESTART_REG, ®_value); | |
2736 | ||
2737 | if (ret < 0) { | |
2738 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_RESTART_REG\n"); | |
2739 | goto fail; | |
2740 | } | |
2741 | ||
2742 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0xF0) >> 4); | |
2743 | ||
2744 | fail: | |
2745 | return ret; | |
2746 | } | |
2747 | ||
2748 | static ssize_t ab8505_powercut_read(struct device *dev, | |
2749 | struct device_attribute *attr, | |
2750 | char *buf) | |
2751 | { | |
2752 | int ret; | |
2753 | u8 reg_value; | |
2754 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2755 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2756 | |
2757 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2758 | AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value); | |
2759 | ||
2760 | if (ret < 0) | |
2761 | goto fail; | |
2762 | ||
2763 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x1)); | |
2764 | ||
2765 | fail: | |
2766 | return ret; | |
2767 | } | |
2768 | ||
2769 | static ssize_t ab8505_powercut_write(struct device *dev, | |
2770 | struct device_attribute *attr, | |
2771 | const char *buf, size_t count) | |
2772 | { | |
2773 | int ret; | |
2774 | int reg_value; | |
2775 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2776 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e | 2777 | |
b00b04aa DX |
2778 | if (kstrtoint(buf, 10, ®_value)) |
2779 | goto fail; | |
2780 | ||
93ff722e LJ |
2781 | if (reg_value > 0x1) { |
2782 | dev_err(dev, "Incorrect parameter, echo 0/1 to disable/enable Pcut feature\n"); | |
2783 | goto fail; | |
2784 | } | |
2785 | ||
2786 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2787 | AB8505_RTC_PCUT_CTL_STATUS_REG, (u8)reg_value); | |
2788 | ||
2789 | if (ret < 0) | |
2790 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_CTL_STATUS_REG\n"); | |
2791 | ||
2792 | fail: | |
2793 | return count; | |
2794 | } | |
2795 | ||
2796 | static ssize_t ab8505_powercut_flag_read(struct device *dev, | |
2797 | struct device_attribute *attr, | |
2798 | char *buf) | |
2799 | { | |
2800 | ||
2801 | int ret; | |
2802 | u8 reg_value; | |
2803 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2804 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2805 | |
2806 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2807 | AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value); | |
2808 | ||
2809 | if (ret < 0) { | |
2810 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_CTL_STATUS_REG\n"); | |
2811 | goto fail; | |
2812 | } | |
2813 | ||
2814 | return scnprintf(buf, PAGE_SIZE, "%d\n", ((reg_value & 0x10) >> 4)); | |
2815 | ||
2816 | fail: | |
2817 | return ret; | |
2818 | } | |
2819 | ||
2820 | static ssize_t ab8505_powercut_debounce_read(struct device *dev, | |
2821 | struct device_attribute *attr, | |
2822 | char *buf) | |
2823 | { | |
2824 | int ret; | |
2825 | u8 reg_value; | |
2826 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2827 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2828 | |
2829 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2830 | AB8505_RTC_PCUT_DEBOUNCE_REG, ®_value); | |
2831 | ||
2832 | if (ret < 0) { | |
2833 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_DEBOUNCE_REG\n"); | |
2834 | goto fail; | |
2835 | } | |
2836 | ||
2837 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7)); | |
2838 | ||
2839 | fail: | |
2840 | return ret; | |
2841 | } | |
2842 | ||
2843 | static ssize_t ab8505_powercut_debounce_write(struct device *dev, | |
2844 | struct device_attribute *attr, | |
2845 | const char *buf, size_t count) | |
2846 | { | |
2847 | int ret; | |
2848 | int reg_value; | |
2849 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2850 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e | 2851 | |
b00b04aa DX |
2852 | if (kstrtoint(buf, 10, ®_value)) |
2853 | goto fail; | |
2854 | ||
93ff722e LJ |
2855 | if (reg_value > 0x7) { |
2856 | dev_err(dev, "Incorrect parameter, echo 0 to 7 for debounce setting\n"); | |
2857 | goto fail; | |
2858 | } | |
2859 | ||
2860 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2861 | AB8505_RTC_PCUT_DEBOUNCE_REG, (u8)reg_value); | |
2862 | ||
2863 | if (ret < 0) | |
2864 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_DEBOUNCE_REG\n"); | |
2865 | ||
2866 | fail: | |
2867 | return count; | |
2868 | } | |
2869 | ||
2870 | static ssize_t ab8505_powercut_enable_status_read(struct device *dev, | |
2871 | struct device_attribute *attr, | |
2872 | char *buf) | |
2873 | { | |
2874 | int ret; | |
2875 | u8 reg_value; | |
2876 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2877 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2878 | |
2879 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2880 | AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value); | |
2881 | ||
2882 | if (ret < 0) { | |
2883 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_CTL_STATUS_REG\n"); | |
2884 | goto fail; | |
2885 | } | |
2886 | ||
2887 | return scnprintf(buf, PAGE_SIZE, "%d\n", ((reg_value & 0x20) >> 5)); | |
2888 | ||
2889 | fail: | |
2890 | return ret; | |
2891 | } | |
2892 | ||
2893 | static struct device_attribute ab8505_fg_sysfs_psy_attrs[] = { | |
2894 | __ATTR(powercut_flagtime, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2895 | ab8505_powercut_flagtime_read, ab8505_powercut_flagtime_write), | |
2896 | __ATTR(powercut_maxtime, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2897 | ab8505_powercut_maxtime_read, ab8505_powercut_maxtime_write), | |
2898 | __ATTR(powercut_restart_max, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2899 | ab8505_powercut_restart_read, ab8505_powercut_restart_write), | |
2900 | __ATTR(powercut_timer, S_IRUGO, ab8505_powercut_timer_read, NULL), | |
2901 | __ATTR(powercut_restart_counter, S_IRUGO, | |
2902 | ab8505_powercut_restart_counter_read, NULL), | |
2903 | __ATTR(powercut_enable, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2904 | ab8505_powercut_read, ab8505_powercut_write), | |
2905 | __ATTR(powercut_flag, S_IRUGO, ab8505_powercut_flag_read, NULL), | |
2906 | __ATTR(powercut_debounce_time, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2907 | ab8505_powercut_debounce_read, ab8505_powercut_debounce_write), | |
2908 | __ATTR(powercut_enable_status, S_IRUGO, | |
2909 | ab8505_powercut_enable_status_read, NULL), | |
2910 | }; | |
2911 | ||
c75cfa9e | 2912 | static int ab8500_fg_sysfs_psy_create_attrs(struct ab8500_fg *di) |
93ff722e | 2913 | { |
7881c647 | 2914 | unsigned int i; |
93ff722e | 2915 | |
4c4268dc | 2916 | if (is_ab8505(di->parent)) { |
7881c647 | 2917 | for (i = 0; i < ARRAY_SIZE(ab8505_fg_sysfs_psy_attrs); i++) |
297d716f | 2918 | if (device_create_file(&di->fg_psy->dev, |
7881c647 | 2919 | &ab8505_fg_sysfs_psy_attrs[i])) |
93ff722e LJ |
2920 | goto sysfs_psy_create_attrs_failed_ab8505; |
2921 | } | |
2922 | return 0; | |
2923 | sysfs_psy_create_attrs_failed_ab8505: | |
297d716f | 2924 | dev_err(&di->fg_psy->dev, "Failed creating sysfs psy attrs for ab8505.\n"); |
7881c647 | 2925 | while (i--) |
297d716f KK |
2926 | device_remove_file(&di->fg_psy->dev, |
2927 | &ab8505_fg_sysfs_psy_attrs[i]); | |
93ff722e LJ |
2928 | |
2929 | return -EIO; | |
2930 | } | |
2931 | ||
c75cfa9e | 2932 | static void ab8500_fg_sysfs_psy_remove_attrs(struct ab8500_fg *di) |
93ff722e LJ |
2933 | { |
2934 | unsigned int i; | |
93ff722e | 2935 | |
4c4268dc | 2936 | if (is_ab8505(di->parent)) { |
93ff722e | 2937 | for (i = 0; i < ARRAY_SIZE(ab8505_fg_sysfs_psy_attrs); i++) |
297d716f | 2938 | (void)device_remove_file(&di->fg_psy->dev, |
c75cfa9e | 2939 | &ab8505_fg_sysfs_psy_attrs[i]); |
93ff722e LJ |
2940 | } |
2941 | } | |
2942 | ||
13151631 AM |
2943 | /* Exposure to the sysfs interface <<END>> */ |
2944 | ||
2945 | #if defined(CONFIG_PM) | |
2946 | static int ab8500_fg_resume(struct platform_device *pdev) | |
2947 | { | |
2948 | struct ab8500_fg *di = platform_get_drvdata(pdev); | |
2949 | ||
2950 | /* | |
2951 | * Change state if we're not charging. If we're charging we will wake | |
2952 | * up on the FG IRQ | |
2953 | */ | |
2954 | if (!di->flags.charging) { | |
2955 | ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_WAKEUP); | |
2956 | queue_work(di->fg_wq, &di->fg_work); | |
2957 | } | |
2958 | ||
2959 | return 0; | |
2960 | } | |
2961 | ||
2962 | static int ab8500_fg_suspend(struct platform_device *pdev, | |
2963 | pm_message_t state) | |
2964 | { | |
2965 | struct ab8500_fg *di = platform_get_drvdata(pdev); | |
2966 | ||
2967 | flush_delayed_work(&di->fg_periodic_work); | |
53ef1f59 JA |
2968 | flush_work(&di->fg_work); |
2969 | flush_work(&di->fg_acc_cur_work); | |
2970 | flush_delayed_work(&di->fg_reinit_work); | |
2971 | flush_delayed_work(&di->fg_low_bat_work); | |
2972 | flush_delayed_work(&di->fg_check_hw_failure_work); | |
13151631 AM |
2973 | |
2974 | /* | |
2975 | * If the FG is enabled we will disable it before going to suspend | |
2976 | * only if we're not charging | |
2977 | */ | |
2978 | if (di->flags.fg_enabled && !di->flags.charging) | |
2979 | ab8500_fg_coulomb_counter(di, false); | |
2980 | ||
2981 | return 0; | |
2982 | } | |
2983 | #else | |
2984 | #define ab8500_fg_suspend NULL | |
2985 | #define ab8500_fg_resume NULL | |
2986 | #endif | |
2987 | ||
415ec69f | 2988 | static int ab8500_fg_remove(struct platform_device *pdev) |
13151631 AM |
2989 | { |
2990 | int ret = 0; | |
2991 | struct ab8500_fg *di = platform_get_drvdata(pdev); | |
2992 | ||
2993 | list_del(&di->node); | |
2994 | ||
2995 | /* Disable coulomb counter */ | |
2996 | ret = ab8500_fg_coulomb_counter(di, false); | |
2997 | if (ret) | |
2998 | dev_err(di->dev, "failed to disable coulomb counter\n"); | |
2999 | ||
3000 | destroy_workqueue(di->fg_wq); | |
3001 | ab8500_fg_sysfs_exit(di); | |
3002 | ||
3003 | flush_scheduled_work(); | |
c75cfa9e | 3004 | ab8500_fg_sysfs_psy_remove_attrs(di); |
297d716f | 3005 | power_supply_unregister(di->fg_psy); |
13151631 AM |
3006 | return ret; |
3007 | } | |
3008 | ||
3009 | /* ab8500 fg driver interrupts and their respective isr */ | |
02232be7 | 3010 | static struct ab8500_fg_interrupts ab8500_fg_irq_th[] = { |
13151631 AM |
3011 | {"NCONV_ACCU", ab8500_fg_cc_convend_handler}, |
3012 | {"BATT_OVV", ab8500_fg_batt_ovv_handler}, | |
3013 | {"LOW_BAT_F", ab8500_fg_lowbatf_handler}, | |
3014 | {"CC_INT_CALIB", ab8500_fg_cc_int_calib_handler}, | |
02232be7 VR |
3015 | }; |
3016 | ||
3017 | static struct ab8500_fg_interrupts ab8500_fg_irq_bh[] = { | |
13151631 AM |
3018 | {"CCEOC", ab8500_fg_cc_data_end_handler}, |
3019 | }; | |
3020 | ||
e0f1abeb R |
3021 | static char *supply_interface[] = { |
3022 | "ab8500_chargalg", | |
3023 | "ab8500_usb", | |
3024 | }; | |
3025 | ||
297d716f KK |
3026 | static const struct power_supply_desc ab8500_fg_desc = { |
3027 | .name = "ab8500_fg", | |
3028 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
3029 | .properties = ab8500_fg_props, | |
3030 | .num_properties = ARRAY_SIZE(ab8500_fg_props), | |
3031 | .get_property = ab8500_fg_get_property, | |
3032 | .external_power_changed = ab8500_fg_external_power_changed, | |
3033 | }; | |
3034 | ||
c8afa640 | 3035 | static int ab8500_fg_probe(struct platform_device *pdev) |
13151631 | 3036 | { |
e0f1abeb | 3037 | struct device_node *np = pdev->dev.of_node; |
195c1c66 | 3038 | struct abx500_bm_data *plat = pdev->dev.platform_data; |
2dc9215d | 3039 | struct power_supply_config psy_cfg = {}; |
e0f1abeb | 3040 | struct ab8500_fg *di; |
13151631 AM |
3041 | int i, irq; |
3042 | int ret = 0; | |
13151631 | 3043 | |
e0f1abeb R |
3044 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
3045 | if (!di) { | |
3046 | dev_err(&pdev->dev, "%s no mem for ab8500_fg\n", __func__); | |
13151631 | 3047 | return -ENOMEM; |
e0f1abeb | 3048 | } |
195c1c66 LJ |
3049 | |
3050 | if (!plat) { | |
3051 | dev_err(&pdev->dev, "no battery management data supplied\n"); | |
3052 | return -EINVAL; | |
3053 | } | |
3054 | di->bm = plat; | |
3055 | ||
3056 | if (np) { | |
3057 | ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm); | |
3058 | if (ret) { | |
3059 | dev_err(&pdev->dev, "failed to get battery information\n"); | |
3060 | return ret; | |
e0f1abeb | 3061 | } |
e0f1abeb | 3062 | } |
13151631 AM |
3063 | |
3064 | mutex_init(&di->cc_lock); | |
3065 | ||
3066 | /* get parent data */ | |
3067 | di->dev = &pdev->dev; | |
3068 | di->parent = dev_get_drvdata(pdev->dev.parent); | |
1e82623c LW |
3069 | |
3070 | di->main_bat_v = devm_iio_channel_get(&pdev->dev, "main_bat_v"); | |
3071 | if (IS_ERR(di->main_bat_v)) { | |
3072 | if (PTR_ERR(di->main_bat_v) == -ENODEV) | |
3073 | return -EPROBE_DEFER; | |
3074 | dev_err(&pdev->dev, "failed to get main battery ADC channel\n"); | |
3075 | return PTR_ERR(di->main_bat_v); | |
3076 | } | |
13151631 | 3077 | |
2dc9215d KK |
3078 | psy_cfg.supplied_to = supply_interface; |
3079 | psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); | |
297d716f | 3080 | psy_cfg.drv_data = di; |
2dc9215d | 3081 | |
13151631 | 3082 | di->bat_cap.max_mah_design = MILLI_TO_MICRO * |
b0284de0 | 3083 | di->bm->bat_type[di->bm->batt_id].charge_full_design; |
13151631 AM |
3084 | |
3085 | di->bat_cap.max_mah = di->bat_cap.max_mah_design; | |
3086 | ||
b0284de0 | 3087 | di->vbat_nom = di->bm->bat_type[di->bm->batt_id].nominal_voltage; |
13151631 AM |
3088 | |
3089 | di->init_capacity = true; | |
3090 | ||
3091 | ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT); | |
3092 | ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_INIT); | |
3093 | ||
3094 | /* Create a work queue for running the FG algorithm */ | |
1c53f370 | 3095 | di->fg_wq = alloc_ordered_workqueue("ab8500_fg_wq", WQ_MEM_RECLAIM); |
13151631 AM |
3096 | if (di->fg_wq == NULL) { |
3097 | dev_err(di->dev, "failed to create work queue\n"); | |
e0f1abeb | 3098 | return -ENOMEM; |
13151631 AM |
3099 | } |
3100 | ||
3101 | /* Init work for running the fg algorithm instantly */ | |
3102 | INIT_WORK(&di->fg_work, ab8500_fg_instant_work); | |
3103 | ||
3104 | /* Init work for getting the battery accumulated current */ | |
3105 | INIT_WORK(&di->fg_acc_cur_work, ab8500_fg_acc_cur_work); | |
3106 | ||
3107 | /* Init work for reinitialising the fg algorithm */ | |
203b42f7 | 3108 | INIT_DEFERRABLE_WORK(&di->fg_reinit_work, |
13151631 AM |
3109 | ab8500_fg_reinit_work); |
3110 | ||
3111 | /* Work delayed Queue to run the state machine */ | |
203b42f7 | 3112 | INIT_DEFERRABLE_WORK(&di->fg_periodic_work, |
13151631 AM |
3113 | ab8500_fg_periodic_work); |
3114 | ||
3115 | /* Work to check low battery condition */ | |
203b42f7 | 3116 | INIT_DEFERRABLE_WORK(&di->fg_low_bat_work, |
13151631 AM |
3117 | ab8500_fg_low_bat_work); |
3118 | ||
3119 | /* Init work for HW failure check */ | |
203b42f7 | 3120 | INIT_DEFERRABLE_WORK(&di->fg_check_hw_failure_work, |
13151631 AM |
3121 | ab8500_fg_check_hw_failure_work); |
3122 | ||
75f2a219 HB |
3123 | /* Reset battery low voltage flag */ |
3124 | di->flags.low_bat = false; | |
3125 | ||
3126 | /* Initialize low battery counter */ | |
3127 | di->low_bat_cnt = 10; | |
3128 | ||
13151631 AM |
3129 | /* Initialize OVV, and other registers */ |
3130 | ret = ab8500_fg_init_hw_registers(di); | |
3131 | if (ret) { | |
3132 | dev_err(di->dev, "failed to initialize registers\n"); | |
3133 | goto free_inst_curr_wq; | |
3134 | } | |
3135 | ||
3136 | /* Consider battery unknown until we're informed otherwise */ | |
3137 | di->flags.batt_unknown = true; | |
3138 | di->flags.batt_id_received = false; | |
3139 | ||
3140 | /* Register FG power supply class */ | |
297d716f KK |
3141 | di->fg_psy = power_supply_register(di->dev, &ab8500_fg_desc, &psy_cfg); |
3142 | if (IS_ERR(di->fg_psy)) { | |
13151631 | 3143 | dev_err(di->dev, "failed to register FG psy\n"); |
297d716f | 3144 | ret = PTR_ERR(di->fg_psy); |
13151631 AM |
3145 | goto free_inst_curr_wq; |
3146 | } | |
3147 | ||
b0284de0 | 3148 | di->fg_samples = SEC_TO_SAMPLE(di->bm->fg_params->init_timer); |
13151631 AM |
3149 | ab8500_fg_coulomb_counter(di, true); |
3150 | ||
3988a4df JB |
3151 | /* |
3152 | * Initialize completion used to notify completion and start | |
3153 | * of inst current | |
3154 | */ | |
3155 | init_completion(&di->ab8500_fg_started); | |
13151631 AM |
3156 | init_completion(&di->ab8500_fg_complete); |
3157 | ||
02232be7 VR |
3158 | /* Register primary interrupt handlers */ |
3159 | for (i = 0; i < ARRAY_SIZE(ab8500_fg_irq_th); i++) { | |
3160 | irq = platform_get_irq_byname(pdev, ab8500_fg_irq_th[i].name); | |
b10e9700 KK |
3161 | if (irq < 0) { |
3162 | ret = irq; | |
3163 | goto free_irq_th; | |
3164 | } | |
3165 | ||
02232be7 VR |
3166 | ret = request_irq(irq, ab8500_fg_irq_th[i].isr, |
3167 | IRQF_SHARED | IRQF_NO_SUSPEND, | |
3168 | ab8500_fg_irq_th[i].name, di); | |
13151631 AM |
3169 | |
3170 | if (ret != 0) { | |
02232be7 VR |
3171 | dev_err(di->dev, "failed to request %s IRQ %d: %d\n", |
3172 | ab8500_fg_irq_th[i].name, irq, ret); | |
24108993 | 3173 | goto free_irq_th; |
13151631 AM |
3174 | } |
3175 | dev_dbg(di->dev, "Requested %s IRQ %d: %d\n", | |
02232be7 | 3176 | ab8500_fg_irq_th[i].name, irq, ret); |
13151631 | 3177 | } |
02232be7 VR |
3178 | |
3179 | /* Register threaded interrupt handler */ | |
3180 | irq = platform_get_irq_byname(pdev, ab8500_fg_irq_bh[0].name); | |
b10e9700 KK |
3181 | if (irq < 0) { |
3182 | ret = irq; | |
3183 | goto free_irq_th; | |
3184 | } | |
3185 | ||
02232be7 VR |
3186 | ret = request_threaded_irq(irq, NULL, ab8500_fg_irq_bh[0].isr, |
3187 | IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT, | |
3188 | ab8500_fg_irq_bh[0].name, di); | |
3189 | ||
3190 | if (ret != 0) { | |
3191 | dev_err(di->dev, "failed to request %s IRQ %d: %d\n", | |
3192 | ab8500_fg_irq_bh[0].name, irq, ret); | |
24108993 | 3193 | goto free_irq_th; |
02232be7 VR |
3194 | } |
3195 | dev_dbg(di->dev, "Requested %s IRQ %d: %d\n", | |
3196 | ab8500_fg_irq_bh[0].name, irq, ret); | |
3197 | ||
13151631 AM |
3198 | di->irq = platform_get_irq_byname(pdev, "CCEOC"); |
3199 | disable_irq(di->irq); | |
3988a4df | 3200 | di->nbr_cceoc_irq_cnt = 0; |
13151631 AM |
3201 | |
3202 | platform_set_drvdata(pdev, di); | |
3203 | ||
3204 | ret = ab8500_fg_sysfs_init(di); | |
3205 | if (ret) { | |
3206 | dev_err(di->dev, "failed to create sysfs entry\n"); | |
3207 | goto free_irq; | |
3208 | } | |
3209 | ||
c75cfa9e | 3210 | ret = ab8500_fg_sysfs_psy_create_attrs(di); |
93ff722e LJ |
3211 | if (ret) { |
3212 | dev_err(di->dev, "failed to create FG psy\n"); | |
3213 | ab8500_fg_sysfs_exit(di); | |
3214 | goto free_irq; | |
3215 | } | |
3216 | ||
13151631 AM |
3217 | /* Calibrate the fg first time */ |
3218 | di->flags.calibrate = true; | |
3219 | di->calib_state = AB8500_FG_CALIB_INIT; | |
3220 | ||
3221 | /* Use room temp as default value until we get an update from driver. */ | |
3222 | di->bat_temp = 210; | |
3223 | ||
3224 | /* Run the FG algorithm */ | |
3225 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
3226 | ||
3227 | list_add_tail(&di->node, &ab8500_fg_list); | |
3228 | ||
3229 | return ret; | |
3230 | ||
3231 | free_irq: | |
02232be7 | 3232 | /* We also have to free all registered irqs */ |
ccc023a5 KK |
3233 | irq = platform_get_irq_byname(pdev, ab8500_fg_irq_bh[0].name); |
3234 | free_irq(irq, di); | |
24108993 KK |
3235 | free_irq_th: |
3236 | while (--i >= 0) { | |
3237 | /* Last assignment of i from primary interrupt handlers */ | |
02232be7 | 3238 | irq = platform_get_irq_byname(pdev, ab8500_fg_irq_th[i].name); |
13151631 AM |
3239 | free_irq(irq, di); |
3240 | } | |
ccc023a5 KK |
3241 | |
3242 | power_supply_unregister(di->fg_psy); | |
13151631 AM |
3243 | free_inst_curr_wq: |
3244 | destroy_workqueue(di->fg_wq); | |
13151631 AM |
3245 | return ret; |
3246 | } | |
3247 | ||
e0f1abeb R |
3248 | static const struct of_device_id ab8500_fg_match[] = { |
3249 | { .compatible = "stericsson,ab8500-fg", }, | |
3250 | { }, | |
3251 | }; | |
3252 | ||
13151631 AM |
3253 | static struct platform_driver ab8500_fg_driver = { |
3254 | .probe = ab8500_fg_probe, | |
28ea73f4 | 3255 | .remove = ab8500_fg_remove, |
13151631 AM |
3256 | .suspend = ab8500_fg_suspend, |
3257 | .resume = ab8500_fg_resume, | |
3258 | .driver = { | |
3259 | .name = "ab8500-fg", | |
e0f1abeb | 3260 | .of_match_table = ab8500_fg_match, |
13151631 AM |
3261 | }, |
3262 | }; | |
3263 | ||
3264 | static int __init ab8500_fg_init(void) | |
3265 | { | |
3266 | return platform_driver_register(&ab8500_fg_driver); | |
3267 | } | |
3268 | ||
3269 | static void __exit ab8500_fg_exit(void) | |
3270 | { | |
3271 | platform_driver_unregister(&ab8500_fg_driver); | |
3272 | } | |
3273 | ||
3274 | subsys_initcall_sync(ab8500_fg_init); | |
3275 | module_exit(ab8500_fg_exit); | |
3276 | ||
3277 | MODULE_LICENSE("GPL v2"); | |
3278 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski"); | |
3279 | MODULE_ALIAS("platform:ab8500-fg"); | |
3280 | MODULE_DESCRIPTION("AB8500 Fuel Gauge driver"); |