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13151631 AM |
1 | /* |
2 | * Copyright (C) ST-Ericsson AB 2012 | |
3 | * | |
4 | * Main and Back-up battery management driver. | |
5 | * | |
6 | * Note: Backup battery management is required in case of Li-Ion battery and not | |
7 | * for capacitive battery. HREF boards have capacitive battery and hence backup | |
8 | * battery management is not used and the supported code is available in this | |
9 | * driver. | |
10 | * | |
11 | * License Terms: GNU General Public License v2 | |
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> | |
35 | #include <linux/mfd/abx500/ab8500-gpadc.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 | |
185 | * @gpadc: Pointer to the struct gpadc | |
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; | |
227 | struct ab8500_gpadc *gpadc; | |
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 | { | |
8000ebf7 | 382 | struct timespec64 ts64; |
13151631 AM |
383 | struct ab8500_fg_avg_cap *avg = &di->avg_cap; |
384 | ||
8000ebf7 | 385 | getnstimeofday64(&ts64); |
13151631 AM |
386 | |
387 | do { | |
388 | avg->sum += sample - avg->samples[avg->pos]; | |
389 | avg->samples[avg->pos] = sample; | |
8000ebf7 | 390 | avg->time_stamps[avg->pos] = ts64.tv_sec; |
13151631 AM |
391 | avg->pos++; |
392 | ||
393 | if (avg->pos == NBR_AVG_SAMPLES) | |
394 | avg->pos = 0; | |
395 | ||
396 | if (avg->nbr_samples < NBR_AVG_SAMPLES) | |
397 | avg->nbr_samples++; | |
398 | ||
399 | /* | |
400 | * Check the time stamp for each sample. If too old, | |
401 | * replace with latest sample | |
402 | */ | |
8000ebf7 | 403 | } while (ts64.tv_sec - VALID_CAPACITY_SEC > avg->time_stamps[avg->pos]); |
13151631 AM |
404 | |
405 | avg->avg = avg->sum / avg->nbr_samples; | |
406 | ||
407 | return avg->avg; | |
408 | } | |
409 | ||
410 | /** | |
411 | * ab8500_fg_clear_cap_samples() - Clear average filter | |
412 | * @di: pointer to the ab8500_fg structure | |
413 | * | |
414 | * The capacity filter is is reset to zero. | |
415 | */ | |
416 | static void ab8500_fg_clear_cap_samples(struct ab8500_fg *di) | |
417 | { | |
418 | int i; | |
419 | struct ab8500_fg_avg_cap *avg = &di->avg_cap; | |
420 | ||
421 | avg->pos = 0; | |
422 | avg->nbr_samples = 0; | |
423 | avg->sum = 0; | |
424 | avg->avg = 0; | |
425 | ||
426 | for (i = 0; i < NBR_AVG_SAMPLES; i++) { | |
427 | avg->samples[i] = 0; | |
428 | avg->time_stamps[i] = 0; | |
429 | } | |
430 | } | |
431 | ||
432 | /** | |
433 | * ab8500_fg_fill_cap_sample() - Fill average filter | |
434 | * @di: pointer to the ab8500_fg structure | |
435 | * @sample: the capacity in mAh to fill the filter with | |
436 | * | |
437 | * The capacity filter is filled with a capacity in mAh | |
438 | */ | |
439 | static void ab8500_fg_fill_cap_sample(struct ab8500_fg *di, int sample) | |
440 | { | |
441 | int i; | |
8000ebf7 | 442 | struct timespec64 ts64; |
13151631 AM |
443 | struct ab8500_fg_avg_cap *avg = &di->avg_cap; |
444 | ||
8000ebf7 | 445 | getnstimeofday64(&ts64); |
13151631 AM |
446 | |
447 | for (i = 0; i < NBR_AVG_SAMPLES; i++) { | |
448 | avg->samples[i] = sample; | |
8000ebf7 | 449 | avg->time_stamps[i] = ts64.tv_sec; |
13151631 AM |
450 | } |
451 | ||
452 | avg->pos = 0; | |
453 | avg->nbr_samples = NBR_AVG_SAMPLES; | |
454 | avg->sum = sample * NBR_AVG_SAMPLES; | |
455 | avg->avg = sample; | |
456 | } | |
457 | ||
458 | /** | |
459 | * ab8500_fg_coulomb_counter() - enable coulomb counter | |
460 | * @di: pointer to the ab8500_fg structure | |
461 | * @enable: enable/disable | |
462 | * | |
463 | * Enable/Disable coulomb counter. | |
464 | * On failure returns negative value. | |
465 | */ | |
466 | static int ab8500_fg_coulomb_counter(struct ab8500_fg *di, bool enable) | |
467 | { | |
468 | int ret = 0; | |
469 | mutex_lock(&di->cc_lock); | |
470 | if (enable) { | |
471 | /* To be able to reprogram the number of samples, we have to | |
472 | * first stop the CC and then enable it again */ | |
473 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
474 | AB8500_RTC_CC_CONF_REG, 0x00); | |
475 | if (ret) | |
476 | goto cc_err; | |
477 | ||
478 | /* Program the samples */ | |
479 | ret = abx500_set_register_interruptible(di->dev, | |
480 | AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU, | |
481 | di->fg_samples); | |
482 | if (ret) | |
483 | goto cc_err; | |
484 | ||
485 | /* Start the CC */ | |
486 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
487 | AB8500_RTC_CC_CONF_REG, | |
488 | (CC_DEEP_SLEEP_ENA | CC_PWR_UP_ENA)); | |
489 | if (ret) | |
490 | goto cc_err; | |
491 | ||
492 | di->flags.fg_enabled = true; | |
493 | } else { | |
494 | /* Clear any pending read requests */ | |
e32ad07c KK |
495 | ret = abx500_mask_and_set_register_interruptible(di->dev, |
496 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
497 | (RESET_ACCU | READ_REQ), 0); | |
13151631 AM |
498 | if (ret) |
499 | goto cc_err; | |
500 | ||
501 | ret = abx500_set_register_interruptible(di->dev, | |
502 | AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU_CTRL, 0); | |
503 | if (ret) | |
504 | goto cc_err; | |
505 | ||
506 | /* Stop the CC */ | |
507 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
508 | AB8500_RTC_CC_CONF_REG, 0); | |
509 | if (ret) | |
510 | goto cc_err; | |
511 | ||
512 | di->flags.fg_enabled = false; | |
513 | ||
514 | } | |
515 | dev_dbg(di->dev, " CC enabled: %d Samples: %d\n", | |
516 | enable, di->fg_samples); | |
517 | ||
518 | mutex_unlock(&di->cc_lock); | |
519 | ||
520 | return ret; | |
521 | cc_err: | |
522 | dev_err(di->dev, "%s Enabling coulomb counter failed\n", __func__); | |
523 | mutex_unlock(&di->cc_lock); | |
524 | return ret; | |
525 | } | |
526 | ||
527 | /** | |
528 | * ab8500_fg_inst_curr_start() - start battery instantaneous current | |
529 | * @di: pointer to the ab8500_fg structure | |
530 | * | |
531 | * Returns 0 or error code | |
532 | * Note: This is part "one" and has to be called before | |
533 | * ab8500_fg_inst_curr_finalize() | |
534 | */ | |
3988a4df | 535 | int ab8500_fg_inst_curr_start(struct ab8500_fg *di) |
13151631 AM |
536 | { |
537 | u8 reg_val; | |
538 | int ret; | |
539 | ||
540 | mutex_lock(&di->cc_lock); | |
541 | ||
3988a4df | 542 | di->nbr_cceoc_irq_cnt = 0; |
13151631 AM |
543 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, |
544 | AB8500_RTC_CC_CONF_REG, ®_val); | |
545 | if (ret < 0) | |
546 | goto fail; | |
547 | ||
548 | if (!(reg_val & CC_PWR_UP_ENA)) { | |
549 | dev_dbg(di->dev, "%s Enable FG\n", __func__); | |
550 | di->turn_off_fg = true; | |
551 | ||
552 | /* Program the samples */ | |
553 | ret = abx500_set_register_interruptible(di->dev, | |
554 | AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU, | |
555 | SEC_TO_SAMPLE(10)); | |
556 | if (ret) | |
557 | goto fail; | |
558 | ||
559 | /* Start the CC */ | |
560 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
561 | AB8500_RTC_CC_CONF_REG, | |
562 | (CC_DEEP_SLEEP_ENA | CC_PWR_UP_ENA)); | |
563 | if (ret) | |
564 | goto fail; | |
565 | } else { | |
566 | di->turn_off_fg = false; | |
567 | } | |
568 | ||
569 | /* Return and WFI */ | |
16735d02 WS |
570 | reinit_completion(&di->ab8500_fg_started); |
571 | reinit_completion(&di->ab8500_fg_complete); | |
13151631 AM |
572 | enable_irq(di->irq); |
573 | ||
574 | /* Note: cc_lock is still locked */ | |
575 | return 0; | |
576 | fail: | |
577 | mutex_unlock(&di->cc_lock); | |
578 | return ret; | |
579 | } | |
580 | ||
3988a4df JB |
581 | /** |
582 | * ab8500_fg_inst_curr_started() - check if fg conversion has started | |
583 | * @di: pointer to the ab8500_fg structure | |
584 | * | |
585 | * Returns 1 if conversion started, 0 if still waiting | |
586 | */ | |
587 | int ab8500_fg_inst_curr_started(struct ab8500_fg *di) | |
588 | { | |
589 | return completion_done(&di->ab8500_fg_started); | |
590 | } | |
591 | ||
13151631 AM |
592 | /** |
593 | * ab8500_fg_inst_curr_done() - check if fg conversion is done | |
594 | * @di: pointer to the ab8500_fg structure | |
595 | * | |
596 | * Returns 1 if conversion done, 0 if still waiting | |
597 | */ | |
598 | int ab8500_fg_inst_curr_done(struct ab8500_fg *di) | |
599 | { | |
600 | return completion_done(&di->ab8500_fg_complete); | |
601 | } | |
602 | ||
603 | /** | |
604 | * ab8500_fg_inst_curr_finalize() - battery instantaneous current | |
605 | * @di: pointer to the ab8500_fg structure | |
606 | * @res: battery instantenous current(on success) | |
607 | * | |
608 | * Returns 0 or an error code | |
609 | * Note: This is part "two" and has to be called at earliest 250 ms | |
610 | * after ab8500_fg_inst_curr_start() | |
611 | */ | |
612 | int ab8500_fg_inst_curr_finalize(struct ab8500_fg *di, int *res) | |
613 | { | |
614 | u8 low, high; | |
615 | int val; | |
616 | int ret; | |
5ae6e2a8 | 617 | unsigned long timeout; |
13151631 AM |
618 | |
619 | if (!completion_done(&di->ab8500_fg_complete)) { | |
3988a4df JB |
620 | timeout = wait_for_completion_timeout( |
621 | &di->ab8500_fg_complete, | |
13151631 AM |
622 | INS_CURR_TIMEOUT); |
623 | dev_dbg(di->dev, "Finalize time: %d ms\n", | |
298631e1 | 624 | jiffies_to_msecs(INS_CURR_TIMEOUT - timeout)); |
13151631 AM |
625 | if (!timeout) { |
626 | ret = -ETIME; | |
627 | disable_irq(di->irq); | |
3988a4df | 628 | di->nbr_cceoc_irq_cnt = 0; |
13151631 AM |
629 | dev_err(di->dev, "completion timed out [%d]\n", |
630 | __LINE__); | |
631 | goto fail; | |
632 | } | |
633 | } | |
634 | ||
635 | disable_irq(di->irq); | |
3988a4df | 636 | di->nbr_cceoc_irq_cnt = 0; |
13151631 AM |
637 | |
638 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
639 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
640 | READ_REQ, READ_REQ); | |
641 | ||
642 | /* 100uS between read request and read is needed */ | |
643 | usleep_range(100, 100); | |
644 | ||
645 | /* Read CC Sample conversion value Low and high */ | |
646 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
647 | AB8500_GASG_CC_SMPL_CNVL_REG, &low); | |
648 | if (ret < 0) | |
649 | goto fail; | |
650 | ||
651 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
652 | AB8500_GASG_CC_SMPL_CNVH_REG, &high); | |
653 | if (ret < 0) | |
654 | goto fail; | |
655 | ||
656 | /* | |
657 | * negative value for Discharging | |
658 | * convert 2's compliment into decimal | |
659 | */ | |
660 | if (high & 0x10) | |
661 | val = (low | (high << 8) | 0xFFFFE000); | |
662 | else | |
663 | val = (low | (high << 8)); | |
664 | ||
665 | /* | |
666 | * Convert to unit value in mA | |
667 | * Full scale input voltage is | |
0577610e | 668 | * 63.160mV => LSB = 63.160mV/(4096*res) = 1.542mA |
13151631 | 669 | * Given a 250ms conversion cycle time the LSB corresponds |
0577610e | 670 | * to 107.1 nAh. Convert to current by dividing by the conversion |
13151631 | 671 | * time in hours (250ms = 1 / (3600 * 4)h) |
0577610e | 672 | * 107.1nAh assumes 10mOhm, but fg_res is in 0.1mOhm |
13151631 AM |
673 | */ |
674 | val = (val * QLSB_NANO_AMP_HOURS_X10 * 36 * 4) / | |
b0284de0 | 675 | (1000 * di->bm->fg_res); |
13151631 AM |
676 | |
677 | if (di->turn_off_fg) { | |
678 | dev_dbg(di->dev, "%s Disable FG\n", __func__); | |
679 | ||
680 | /* Clear any pending read requests */ | |
681 | ret = abx500_set_register_interruptible(di->dev, | |
682 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, 0); | |
683 | if (ret) | |
684 | goto fail; | |
685 | ||
686 | /* Stop the CC */ | |
687 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
688 | AB8500_RTC_CC_CONF_REG, 0); | |
689 | if (ret) | |
690 | goto fail; | |
691 | } | |
692 | mutex_unlock(&di->cc_lock); | |
693 | (*res) = val; | |
694 | ||
695 | return 0; | |
696 | fail: | |
697 | mutex_unlock(&di->cc_lock); | |
698 | return ret; | |
699 | } | |
700 | ||
701 | /** | |
702 | * ab8500_fg_inst_curr_blocking() - battery instantaneous current | |
703 | * @di: pointer to the ab8500_fg structure | |
704 | * @res: battery instantenous current(on success) | |
705 | * | |
706 | * Returns 0 else error code | |
707 | */ | |
708 | int ab8500_fg_inst_curr_blocking(struct ab8500_fg *di) | |
709 | { | |
710 | int ret; | |
5ae6e2a8 | 711 | unsigned long timeout; |
13151631 AM |
712 | int res = 0; |
713 | ||
714 | ret = ab8500_fg_inst_curr_start(di); | |
715 | if (ret) { | |
716 | dev_err(di->dev, "Failed to initialize fg_inst\n"); | |
717 | return 0; | |
718 | } | |
719 | ||
3988a4df JB |
720 | /* Wait for CC to actually start */ |
721 | if (!completion_done(&di->ab8500_fg_started)) { | |
722 | timeout = wait_for_completion_timeout( | |
723 | &di->ab8500_fg_started, | |
724 | INS_CURR_TIMEOUT); | |
725 | dev_dbg(di->dev, "Start time: %d ms\n", | |
298631e1 | 726 | jiffies_to_msecs(INS_CURR_TIMEOUT - timeout)); |
3988a4df JB |
727 | if (!timeout) { |
728 | ret = -ETIME; | |
729 | dev_err(di->dev, "completion timed out [%d]\n", | |
730 | __LINE__); | |
731 | goto fail; | |
732 | } | |
733 | } | |
734 | ||
13151631 AM |
735 | ret = ab8500_fg_inst_curr_finalize(di, &res); |
736 | if (ret) { | |
737 | dev_err(di->dev, "Failed to finalize fg_inst\n"); | |
738 | return 0; | |
739 | } | |
740 | ||
3988a4df | 741 | dev_dbg(di->dev, "%s instant current: %d", __func__, res); |
13151631 | 742 | return res; |
3988a4df | 743 | fail: |
129d583b | 744 | disable_irq(di->irq); |
3988a4df JB |
745 | mutex_unlock(&di->cc_lock); |
746 | return ret; | |
13151631 AM |
747 | } |
748 | ||
749 | /** | |
750 | * ab8500_fg_acc_cur_work() - average battery current | |
751 | * @work: pointer to the work_struct structure | |
752 | * | |
753 | * Updated the average battery current obtained from the | |
754 | * coulomb counter. | |
755 | */ | |
756 | static void ab8500_fg_acc_cur_work(struct work_struct *work) | |
757 | { | |
758 | int val; | |
759 | int ret; | |
760 | u8 low, med, high; | |
761 | ||
762 | struct ab8500_fg *di = container_of(work, | |
763 | struct ab8500_fg, fg_acc_cur_work); | |
764 | ||
765 | mutex_lock(&di->cc_lock); | |
766 | ret = abx500_set_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
767 | AB8500_GASG_CC_NCOV_ACCU_CTRL, RD_NCONV_ACCU_REQ); | |
768 | if (ret) | |
769 | goto exit; | |
770 | ||
771 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
772 | AB8500_GASG_CC_NCOV_ACCU_LOW, &low); | |
773 | if (ret < 0) | |
774 | goto exit; | |
775 | ||
776 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
777 | AB8500_GASG_CC_NCOV_ACCU_MED, &med); | |
778 | if (ret < 0) | |
779 | goto exit; | |
780 | ||
781 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
782 | AB8500_GASG_CC_NCOV_ACCU_HIGH, &high); | |
783 | if (ret < 0) | |
784 | goto exit; | |
785 | ||
786 | /* Check for sign bit in case of negative value, 2's compliment */ | |
787 | if (high & 0x10) | |
788 | val = (low | (med << 8) | (high << 16) | 0xFFE00000); | |
789 | else | |
790 | val = (low | (med << 8) | (high << 16)); | |
791 | ||
792 | /* | |
793 | * Convert to uAh | |
794 | * Given a 250ms conversion cycle time the LSB corresponds | |
795 | * to 112.9 nAh. | |
796 | * 112.9nAh assumes 10mOhm, but fg_res is in 0.1mOhm | |
797 | */ | |
798 | di->accu_charge = (val * QLSB_NANO_AMP_HOURS_X10) / | |
b0284de0 | 799 | (100 * di->bm->fg_res); |
13151631 AM |
800 | |
801 | /* | |
802 | * Convert to unit value in mA | |
f902dadc | 803 | * by dividing by the conversion |
13151631 | 804 | * time in hours (= samples / (3600 * 4)h) |
f902dadc | 805 | * and multiply with 1000 |
13151631 AM |
806 | */ |
807 | di->avg_curr = (val * QLSB_NANO_AMP_HOURS_X10 * 36) / | |
b0284de0 | 808 | (1000 * di->bm->fg_res * (di->fg_samples / 4)); |
13151631 AM |
809 | |
810 | di->flags.conv_done = true; | |
811 | ||
812 | mutex_unlock(&di->cc_lock); | |
813 | ||
814 | queue_work(di->fg_wq, &di->fg_work); | |
815 | ||
f902dadc POH |
816 | dev_dbg(di->dev, "fg_res: %d, fg_samples: %d, gasg: %d, accu_charge: %d \n", |
817 | di->bm->fg_res, di->fg_samples, val, di->accu_charge); | |
13151631 AM |
818 | return; |
819 | exit: | |
820 | dev_err(di->dev, | |
821 | "Failed to read or write gas gauge registers\n"); | |
822 | mutex_unlock(&di->cc_lock); | |
823 | queue_work(di->fg_wq, &di->fg_work); | |
824 | } | |
825 | ||
826 | /** | |
827 | * ab8500_fg_bat_voltage() - get battery voltage | |
828 | * @di: pointer to the ab8500_fg structure | |
829 | * | |
830 | * Returns battery voltage(on success) else error code | |
831 | */ | |
832 | static int ab8500_fg_bat_voltage(struct ab8500_fg *di) | |
833 | { | |
834 | int vbat; | |
835 | static int prev; | |
836 | ||
837 | vbat = ab8500_gpadc_convert(di->gpadc, MAIN_BAT_V); | |
838 | if (vbat < 0) { | |
839 | dev_err(di->dev, | |
840 | "%s gpadc conversion failed, using previous value\n", | |
841 | __func__); | |
842 | return prev; | |
843 | } | |
844 | ||
845 | prev = vbat; | |
846 | return vbat; | |
847 | } | |
848 | ||
849 | /** | |
850 | * ab8500_fg_volt_to_capacity() - Voltage based capacity | |
851 | * @di: pointer to the ab8500_fg structure | |
852 | * @voltage: The voltage to convert to a capacity | |
853 | * | |
854 | * Returns battery capacity in per mille based on voltage | |
855 | */ | |
856 | static int ab8500_fg_volt_to_capacity(struct ab8500_fg *di, int voltage) | |
857 | { | |
858 | int i, tbl_size; | |
2c899407 | 859 | const struct abx500_v_to_cap *tbl; |
13151631 AM |
860 | int cap = 0; |
861 | ||
b0284de0 LJ |
862 | tbl = di->bm->bat_type[di->bm->batt_id].v_to_cap_tbl, |
863 | tbl_size = di->bm->bat_type[di->bm->batt_id].n_v_cap_tbl_elements; | |
13151631 AM |
864 | |
865 | for (i = 0; i < tbl_size; ++i) { | |
866 | if (voltage > tbl[i].voltage) | |
867 | break; | |
868 | } | |
869 | ||
870 | if ((i > 0) && (i < tbl_size)) { | |
871 | cap = interpolate(voltage, | |
872 | tbl[i].voltage, | |
873 | tbl[i].capacity * 10, | |
874 | tbl[i-1].voltage, | |
875 | tbl[i-1].capacity * 10); | |
876 | } else if (i == 0) { | |
877 | cap = 1000; | |
878 | } else { | |
879 | cap = 0; | |
880 | } | |
881 | ||
882 | dev_dbg(di->dev, "%s Vbat: %d, Cap: %d per mille", | |
883 | __func__, voltage, cap); | |
884 | ||
885 | return cap; | |
886 | } | |
887 | ||
888 | /** | |
889 | * ab8500_fg_uncomp_volt_to_capacity() - Uncompensated voltage based capacity | |
890 | * @di: pointer to the ab8500_fg structure | |
891 | * | |
892 | * Returns battery capacity based on battery voltage that is not compensated | |
893 | * for the voltage drop due to the load | |
894 | */ | |
895 | static int ab8500_fg_uncomp_volt_to_capacity(struct ab8500_fg *di) | |
896 | { | |
897 | di->vbat = ab8500_fg_bat_voltage(di); | |
898 | return ab8500_fg_volt_to_capacity(di, di->vbat); | |
899 | } | |
900 | ||
901 | /** | |
902 | * ab8500_fg_battery_resistance() - Returns the battery inner resistance | |
903 | * @di: pointer to the ab8500_fg structure | |
904 | * | |
905 | * Returns battery inner resistance added with the fuel gauge resistor value | |
906 | * to get the total resistance in the whole link from gnd to bat+ node. | |
907 | */ | |
908 | static int ab8500_fg_battery_resistance(struct ab8500_fg *di) | |
909 | { | |
910 | int i, tbl_size; | |
2c899407 | 911 | const struct batres_vs_temp *tbl; |
13151631 AM |
912 | int resist = 0; |
913 | ||
b0284de0 LJ |
914 | tbl = di->bm->bat_type[di->bm->batt_id].batres_tbl; |
915 | tbl_size = di->bm->bat_type[di->bm->batt_id].n_batres_tbl_elements; | |
13151631 AM |
916 | |
917 | for (i = 0; i < tbl_size; ++i) { | |
918 | if (di->bat_temp / 10 > tbl[i].temp) | |
919 | break; | |
920 | } | |
921 | ||
922 | if ((i > 0) && (i < tbl_size)) { | |
923 | resist = interpolate(di->bat_temp / 10, | |
924 | tbl[i].temp, | |
925 | tbl[i].resist, | |
926 | tbl[i-1].temp, | |
927 | tbl[i-1].resist); | |
928 | } else if (i == 0) { | |
929 | resist = tbl[0].resist; | |
930 | } else { | |
931 | resist = tbl[tbl_size - 1].resist; | |
932 | } | |
933 | ||
934 | dev_dbg(di->dev, "%s Temp: %d battery internal resistance: %d" | |
935 | " fg resistance %d, total: %d (mOhm)\n", | |
b0284de0 LJ |
936 | __func__, di->bat_temp, resist, di->bm->fg_res / 10, |
937 | (di->bm->fg_res / 10) + resist); | |
13151631 AM |
938 | |
939 | /* fg_res variable is in 0.1mOhm */ | |
b0284de0 | 940 | resist += di->bm->fg_res / 10; |
13151631 AM |
941 | |
942 | return resist; | |
943 | } | |
944 | ||
945 | /** | |
946 | * ab8500_fg_load_comp_volt_to_capacity() - Load compensated voltage based capacity | |
947 | * @di: pointer to the ab8500_fg structure | |
948 | * | |
949 | * Returns battery capacity based on battery voltage that is load compensated | |
950 | * for the voltage drop | |
951 | */ | |
952 | static int ab8500_fg_load_comp_volt_to_capacity(struct ab8500_fg *di) | |
953 | { | |
954 | int vbat_comp, res; | |
955 | int i = 0; | |
956 | int vbat = 0; | |
957 | ||
958 | ab8500_fg_inst_curr_start(di); | |
959 | ||
960 | do { | |
961 | vbat += ab8500_fg_bat_voltage(di); | |
962 | i++; | |
9a0bd070 | 963 | usleep_range(5000, 6000); |
13151631 AM |
964 | } while (!ab8500_fg_inst_curr_done(di)); |
965 | ||
966 | ab8500_fg_inst_curr_finalize(di, &di->inst_curr); | |
967 | ||
968 | di->vbat = vbat / i; | |
969 | res = ab8500_fg_battery_resistance(di); | |
970 | ||
971 | /* Use Ohms law to get the load compensated voltage */ | |
972 | vbat_comp = di->vbat - (di->inst_curr * res) / 1000; | |
973 | ||
974 | dev_dbg(di->dev, "%s Measured Vbat: %dmV,Compensated Vbat %dmV, " | |
975 | "R: %dmOhm, Current: %dmA Vbat Samples: %d\n", | |
976 | __func__, di->vbat, vbat_comp, res, di->inst_curr, i); | |
977 | ||
978 | return ab8500_fg_volt_to_capacity(di, vbat_comp); | |
979 | } | |
980 | ||
981 | /** | |
982 | * ab8500_fg_convert_mah_to_permille() - Capacity in mAh to permille | |
983 | * @di: pointer to the ab8500_fg structure | |
984 | * @cap_mah: capacity in mAh | |
985 | * | |
986 | * Converts capacity in mAh to capacity in permille | |
987 | */ | |
988 | static int ab8500_fg_convert_mah_to_permille(struct ab8500_fg *di, int cap_mah) | |
989 | { | |
990 | return (cap_mah * 1000) / di->bat_cap.max_mah_design; | |
991 | } | |
992 | ||
993 | /** | |
994 | * ab8500_fg_convert_permille_to_mah() - Capacity in permille to mAh | |
995 | * @di: pointer to the ab8500_fg structure | |
996 | * @cap_pm: capacity in permille | |
997 | * | |
998 | * Converts capacity in permille to capacity in mAh | |
999 | */ | |
1000 | static int ab8500_fg_convert_permille_to_mah(struct ab8500_fg *di, int cap_pm) | |
1001 | { | |
1002 | return cap_pm * di->bat_cap.max_mah_design / 1000; | |
1003 | } | |
1004 | ||
1005 | /** | |
1006 | * ab8500_fg_convert_mah_to_uwh() - Capacity in mAh to uWh | |
1007 | * @di: pointer to the ab8500_fg structure | |
1008 | * @cap_mah: capacity in mAh | |
1009 | * | |
1010 | * Converts capacity in mAh to capacity in uWh | |
1011 | */ | |
1012 | static int ab8500_fg_convert_mah_to_uwh(struct ab8500_fg *di, int cap_mah) | |
1013 | { | |
1014 | u64 div_res; | |
1015 | u32 div_rem; | |
1016 | ||
1017 | div_res = ((u64) cap_mah) * ((u64) di->vbat_nom); | |
1018 | div_rem = do_div(div_res, 1000); | |
1019 | ||
1020 | /* Make sure to round upwards if necessary */ | |
1021 | if (div_rem >= 1000 / 2) | |
1022 | div_res++; | |
1023 | ||
1024 | return (int) div_res; | |
1025 | } | |
1026 | ||
1027 | /** | |
1028 | * ab8500_fg_calc_cap_charging() - Calculate remaining capacity while charging | |
1029 | * @di: pointer to the ab8500_fg structure | |
1030 | * | |
1031 | * Return the capacity in mAh based on previous calculated capcity and the FG | |
1032 | * accumulator register value. The filter is filled with this capacity | |
1033 | */ | |
1034 | static int ab8500_fg_calc_cap_charging(struct ab8500_fg *di) | |
1035 | { | |
1036 | dev_dbg(di->dev, "%s cap_mah %d accu_charge %d\n", | |
1037 | __func__, | |
1038 | di->bat_cap.mah, | |
1039 | di->accu_charge); | |
1040 | ||
1041 | /* Capacity should not be less than 0 */ | |
1042 | if (di->bat_cap.mah + di->accu_charge > 0) | |
1043 | di->bat_cap.mah += di->accu_charge; | |
1044 | else | |
1045 | di->bat_cap.mah = 0; | |
1046 | /* | |
1047 | * We force capacity to 100% once when the algorithm | |
1048 | * reports that it's full. | |
1049 | */ | |
1050 | if (di->bat_cap.mah >= di->bat_cap.max_mah_design || | |
1051 | di->flags.force_full) { | |
1052 | di->bat_cap.mah = di->bat_cap.max_mah_design; | |
1053 | } | |
1054 | ||
1055 | ab8500_fg_fill_cap_sample(di, di->bat_cap.mah); | |
1056 | di->bat_cap.permille = | |
1057 | ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); | |
1058 | ||
1059 | /* We need to update battery voltage and inst current when charging */ | |
1060 | di->vbat = ab8500_fg_bat_voltage(di); | |
1061 | di->inst_curr = ab8500_fg_inst_curr_blocking(di); | |
1062 | ||
1063 | return di->bat_cap.mah; | |
1064 | } | |
1065 | ||
1066 | /** | |
1067 | * ab8500_fg_calc_cap_discharge_voltage() - Capacity in discharge with voltage | |
1068 | * @di: pointer to the ab8500_fg structure | |
1069 | * @comp: if voltage should be load compensated before capacity calc | |
1070 | * | |
1071 | * Return the capacity in mAh based on the battery voltage. The voltage can | |
1072 | * either be load compensated or not. This value is added to the filter and a | |
1073 | * new mean value is calculated and returned. | |
1074 | */ | |
1075 | static int ab8500_fg_calc_cap_discharge_voltage(struct ab8500_fg *di, bool comp) | |
1076 | { | |
1077 | int permille, mah; | |
1078 | ||
1079 | if (comp) | |
1080 | permille = ab8500_fg_load_comp_volt_to_capacity(di); | |
1081 | else | |
1082 | permille = ab8500_fg_uncomp_volt_to_capacity(di); | |
1083 | ||
1084 | mah = ab8500_fg_convert_permille_to_mah(di, permille); | |
1085 | ||
1086 | di->bat_cap.mah = ab8500_fg_add_cap_sample(di, mah); | |
1087 | di->bat_cap.permille = | |
1088 | ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); | |
1089 | ||
1090 | return di->bat_cap.mah; | |
1091 | } | |
1092 | ||
1093 | /** | |
1094 | * ab8500_fg_calc_cap_discharge_fg() - Capacity in discharge with FG | |
1095 | * @di: pointer to the ab8500_fg structure | |
1096 | * | |
1097 | * Return the capacity in mAh based on previous calculated capcity and the FG | |
1098 | * accumulator register value. This value is added to the filter and a | |
1099 | * new mean value is calculated and returned. | |
1100 | */ | |
1101 | static int ab8500_fg_calc_cap_discharge_fg(struct ab8500_fg *di) | |
1102 | { | |
1103 | int permille_volt, permille; | |
1104 | ||
1105 | dev_dbg(di->dev, "%s cap_mah %d accu_charge %d\n", | |
1106 | __func__, | |
1107 | di->bat_cap.mah, | |
1108 | di->accu_charge); | |
1109 | ||
1110 | /* Capacity should not be less than 0 */ | |
1111 | if (di->bat_cap.mah + di->accu_charge > 0) | |
1112 | di->bat_cap.mah += di->accu_charge; | |
1113 | else | |
1114 | di->bat_cap.mah = 0; | |
1115 | ||
1116 | if (di->bat_cap.mah >= di->bat_cap.max_mah_design) | |
1117 | di->bat_cap.mah = di->bat_cap.max_mah_design; | |
1118 | ||
1119 | /* | |
1120 | * Check against voltage based capacity. It can not be lower | |
1121 | * than what the uncompensated voltage says | |
1122 | */ | |
1123 | permille = ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); | |
1124 | permille_volt = ab8500_fg_uncomp_volt_to_capacity(di); | |
1125 | ||
1126 | if (permille < permille_volt) { | |
1127 | di->bat_cap.permille = permille_volt; | |
1128 | di->bat_cap.mah = ab8500_fg_convert_permille_to_mah(di, | |
1129 | di->bat_cap.permille); | |
1130 | ||
1131 | dev_dbg(di->dev, "%s voltage based: perm %d perm_volt %d\n", | |
1132 | __func__, | |
1133 | permille, | |
1134 | permille_volt); | |
1135 | ||
1136 | ab8500_fg_fill_cap_sample(di, di->bat_cap.mah); | |
1137 | } else { | |
1138 | ab8500_fg_fill_cap_sample(di, di->bat_cap.mah); | |
1139 | di->bat_cap.permille = | |
1140 | ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); | |
1141 | } | |
1142 | ||
1143 | return di->bat_cap.mah; | |
1144 | } | |
1145 | ||
1146 | /** | |
1147 | * ab8500_fg_capacity_level() - Get the battery capacity level | |
1148 | * @di: pointer to the ab8500_fg structure | |
1149 | * | |
1150 | * Get the battery capacity level based on the capacity in percent | |
1151 | */ | |
1152 | static int ab8500_fg_capacity_level(struct ab8500_fg *di) | |
1153 | { | |
1154 | int ret, percent; | |
1155 | ||
6eaf8740 | 1156 | percent = DIV_ROUND_CLOSEST(di->bat_cap.permille, 10); |
13151631 | 1157 | |
b0284de0 | 1158 | if (percent <= di->bm->cap_levels->critical || |
13151631 AM |
1159 | di->flags.low_bat) |
1160 | ret = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; | |
b0284de0 | 1161 | else if (percent <= di->bm->cap_levels->low) |
13151631 | 1162 | ret = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
b0284de0 | 1163 | else if (percent <= di->bm->cap_levels->normal) |
13151631 | 1164 | ret = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; |
b0284de0 | 1165 | else if (percent <= di->bm->cap_levels->high) |
13151631 AM |
1166 | ret = POWER_SUPPLY_CAPACITY_LEVEL_HIGH; |
1167 | else | |
1168 | ret = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
1169 | ||
1170 | return ret; | |
1171 | } | |
1172 | ||
ea402401 MC |
1173 | /** |
1174 | * ab8500_fg_calculate_scaled_capacity() - Capacity scaling | |
1175 | * @di: pointer to the ab8500_fg structure | |
1176 | * | |
1177 | * Calculates the capacity to be shown to upper layers. Scales the capacity | |
1178 | * to have 100% as a reference from the actual capacity upon removal of charger | |
1179 | * when charging is in maintenance mode. | |
1180 | */ | |
1181 | static int ab8500_fg_calculate_scaled_capacity(struct ab8500_fg *di) | |
1182 | { | |
1183 | struct ab8500_fg_cap_scaling *cs = &di->bat_cap.cap_scale; | |
1184 | int capacity = di->bat_cap.prev_percent; | |
1185 | ||
1186 | if (!cs->enable) | |
1187 | return capacity; | |
1188 | ||
1189 | /* | |
1190 | * As long as we are in fully charge mode scale the capacity | |
1191 | * to show 100%. | |
1192 | */ | |
1193 | if (di->flags.fully_charged) { | |
1194 | cs->cap_to_scale[0] = 100; | |
1195 | cs->cap_to_scale[1] = | |
1196 | max(capacity, di->bm->fg_params->maint_thres); | |
1197 | dev_dbg(di->dev, "Scale cap with %d/%d\n", | |
1198 | cs->cap_to_scale[0], cs->cap_to_scale[1]); | |
1199 | } | |
1200 | ||
1201 | /* Calculates the scaled capacity. */ | |
1202 | if ((cs->cap_to_scale[0] != cs->cap_to_scale[1]) | |
1203 | && (cs->cap_to_scale[1] > 0)) | |
1204 | capacity = min(100, | |
1205 | DIV_ROUND_CLOSEST(di->bat_cap.prev_percent * | |
1206 | cs->cap_to_scale[0], | |
1207 | cs->cap_to_scale[1])); | |
1208 | ||
1209 | if (di->flags.charging) { | |
1210 | if (capacity < cs->disable_cap_level) { | |
1211 | cs->disable_cap_level = capacity; | |
1212 | dev_dbg(di->dev, "Cap to stop scale lowered %d%%\n", | |
1213 | cs->disable_cap_level); | |
1214 | } else if (!di->flags.fully_charged) { | |
1215 | if (di->bat_cap.prev_percent >= | |
1216 | cs->disable_cap_level) { | |
1217 | dev_dbg(di->dev, "Disabling scaled capacity\n"); | |
1218 | cs->enable = false; | |
1219 | capacity = di->bat_cap.prev_percent; | |
1220 | } else { | |
1221 | dev_dbg(di->dev, | |
1222 | "Waiting in cap to level %d%%\n", | |
1223 | cs->disable_cap_level); | |
1224 | capacity = cs->disable_cap_level; | |
1225 | } | |
1226 | } | |
1227 | } | |
1228 | ||
1229 | return capacity; | |
1230 | } | |
1231 | ||
1232 | /** | |
1233 | * ab8500_fg_update_cap_scalers() - Capacity scaling | |
1234 | * @di: pointer to the ab8500_fg structure | |
1235 | * | |
1236 | * To be called when state change from charge<->discharge to update | |
1237 | * the capacity scalers. | |
1238 | */ | |
1239 | static void ab8500_fg_update_cap_scalers(struct ab8500_fg *di) | |
1240 | { | |
1241 | struct ab8500_fg_cap_scaling *cs = &di->bat_cap.cap_scale; | |
1242 | ||
1243 | if (!cs->enable) | |
1244 | return; | |
1245 | if (di->flags.charging) { | |
1246 | di->bat_cap.cap_scale.disable_cap_level = | |
1247 | di->bat_cap.cap_scale.scaled_cap; | |
1248 | dev_dbg(di->dev, "Cap to stop scale at charge %d%%\n", | |
1249 | di->bat_cap.cap_scale.disable_cap_level); | |
1250 | } else { | |
1251 | if (cs->scaled_cap != 100) { | |
1252 | cs->cap_to_scale[0] = cs->scaled_cap; | |
1253 | cs->cap_to_scale[1] = di->bat_cap.prev_percent; | |
1254 | } else { | |
1255 | cs->cap_to_scale[0] = 100; | |
1256 | cs->cap_to_scale[1] = | |
1257 | max(di->bat_cap.prev_percent, | |
1258 | di->bm->fg_params->maint_thres); | |
1259 | } | |
1260 | ||
1261 | dev_dbg(di->dev, "Cap to scale at discharge %d/%d\n", | |
1262 | cs->cap_to_scale[0], cs->cap_to_scale[1]); | |
1263 | } | |
1264 | } | |
1265 | ||
13151631 AM |
1266 | /** |
1267 | * ab8500_fg_check_capacity_limits() - Check if capacity has changed | |
1268 | * @di: pointer to the ab8500_fg structure | |
1269 | * @init: capacity is allowed to go up in init mode | |
1270 | * | |
1271 | * Check if capacity or capacity limit has changed and notify the system | |
1272 | * about it using the power_supply framework | |
1273 | */ | |
1274 | static void ab8500_fg_check_capacity_limits(struct ab8500_fg *di, bool init) | |
1275 | { | |
1276 | bool changed = false; | |
6eaf8740 | 1277 | int percent = DIV_ROUND_CLOSEST(di->bat_cap.permille, 10); |
13151631 AM |
1278 | |
1279 | di->bat_cap.level = ab8500_fg_capacity_level(di); | |
1280 | ||
1281 | if (di->bat_cap.level != di->bat_cap.prev_level) { | |
1282 | /* | |
1283 | * We do not allow reported capacity level to go up | |
1284 | * unless we're charging or if we're in init | |
1285 | */ | |
1286 | if (!(!di->flags.charging && di->bat_cap.level > | |
1287 | di->bat_cap.prev_level) || init) { | |
1288 | dev_dbg(di->dev, "level changed from %d to %d\n", | |
1289 | di->bat_cap.prev_level, | |
1290 | di->bat_cap.level); | |
1291 | di->bat_cap.prev_level = di->bat_cap.level; | |
1292 | changed = true; | |
1293 | } else { | |
1294 | dev_dbg(di->dev, "level not allowed to go up " | |
1295 | "since no charger is connected: %d to %d\n", | |
1296 | di->bat_cap.prev_level, | |
1297 | di->bat_cap.level); | |
1298 | } | |
1299 | } | |
1300 | ||
1301 | /* | |
1302 | * If we have received the LOW_BAT IRQ, set capacity to 0 to initiate | |
1303 | * shutdown | |
1304 | */ | |
1305 | if (di->flags.low_bat) { | |
1306 | dev_dbg(di->dev, "Battery low, set capacity to 0\n"); | |
1307 | di->bat_cap.prev_percent = 0; | |
1308 | di->bat_cap.permille = 0; | |
6eaf8740 | 1309 | percent = 0; |
13151631 AM |
1310 | di->bat_cap.prev_mah = 0; |
1311 | di->bat_cap.mah = 0; | |
1312 | changed = true; | |
1313 | } else if (di->flags.fully_charged) { | |
1314 | /* | |
1315 | * We report 100% if algorithm reported fully charged | |
ea402401 | 1316 | * and show 100% during maintenance charging (scaling). |
13151631 AM |
1317 | */ |
1318 | if (di->flags.force_full) { | |
6eaf8740 | 1319 | di->bat_cap.prev_percent = percent; |
13151631 | 1320 | di->bat_cap.prev_mah = di->bat_cap.mah; |
ea402401 MC |
1321 | |
1322 | changed = true; | |
1323 | ||
1324 | if (!di->bat_cap.cap_scale.enable && | |
1325 | di->bm->capacity_scaling) { | |
1326 | di->bat_cap.cap_scale.enable = true; | |
1327 | di->bat_cap.cap_scale.cap_to_scale[0] = 100; | |
1328 | di->bat_cap.cap_scale.cap_to_scale[1] = | |
1329 | di->bat_cap.prev_percent; | |
1330 | di->bat_cap.cap_scale.disable_cap_level = 100; | |
1331 | } | |
6eaf8740 | 1332 | } else if (di->bat_cap.prev_percent != percent) { |
13151631 AM |
1333 | dev_dbg(di->dev, |
1334 | "battery reported full " | |
1335 | "but capacity dropping: %d\n", | |
6eaf8740 | 1336 | percent); |
1337 | di->bat_cap.prev_percent = percent; | |
13151631 AM |
1338 | di->bat_cap.prev_mah = di->bat_cap.mah; |
1339 | ||
1340 | changed = true; | |
1341 | } | |
6eaf8740 | 1342 | } else if (di->bat_cap.prev_percent != percent) { |
1343 | if (percent == 0) { | |
13151631 AM |
1344 | /* |
1345 | * We will not report 0% unless we've got | |
1346 | * the LOW_BAT IRQ, no matter what the FG | |
1347 | * algorithm says. | |
1348 | */ | |
1349 | di->bat_cap.prev_percent = 1; | |
6eaf8740 | 1350 | percent = 1; |
13151631 AM |
1351 | |
1352 | changed = true; | |
1353 | } else if (!(!di->flags.charging && | |
6eaf8740 | 1354 | percent > di->bat_cap.prev_percent) || init) { |
13151631 AM |
1355 | /* |
1356 | * We do not allow reported capacity to go up | |
1357 | * unless we're charging or if we're in init | |
1358 | */ | |
1359 | dev_dbg(di->dev, | |
1360 | "capacity changed from %d to %d (%d)\n", | |
1361 | di->bat_cap.prev_percent, | |
6eaf8740 | 1362 | percent, |
13151631 | 1363 | di->bat_cap.permille); |
6eaf8740 | 1364 | di->bat_cap.prev_percent = percent; |
13151631 AM |
1365 | di->bat_cap.prev_mah = di->bat_cap.mah; |
1366 | ||
1367 | changed = true; | |
1368 | } else { | |
1369 | dev_dbg(di->dev, "capacity not allowed to go up since " | |
1370 | "no charger is connected: %d to %d (%d)\n", | |
1371 | di->bat_cap.prev_percent, | |
6eaf8740 | 1372 | percent, |
13151631 AM |
1373 | di->bat_cap.permille); |
1374 | } | |
1375 | } | |
1376 | ||
1377 | if (changed) { | |
ea402401 MC |
1378 | if (di->bm->capacity_scaling) { |
1379 | di->bat_cap.cap_scale.scaled_cap = | |
1380 | ab8500_fg_calculate_scaled_capacity(di); | |
1381 | ||
1382 | dev_info(di->dev, "capacity=%d (%d)\n", | |
1383 | di->bat_cap.prev_percent, | |
1384 | di->bat_cap.cap_scale.scaled_cap); | |
1385 | } | |
297d716f | 1386 | power_supply_changed(di->fg_psy); |
13151631 AM |
1387 | if (di->flags.fully_charged && di->flags.force_full) { |
1388 | dev_dbg(di->dev, "Battery full, notifying.\n"); | |
1389 | di->flags.force_full = false; | |
1390 | sysfs_notify(&di->fg_kobject, NULL, "charge_full"); | |
1391 | } | |
1392 | sysfs_notify(&di->fg_kobject, NULL, "charge_now"); | |
1393 | } | |
1394 | } | |
1395 | ||
1396 | static void ab8500_fg_charge_state_to(struct ab8500_fg *di, | |
1397 | enum ab8500_fg_charge_state new_state) | |
1398 | { | |
1399 | dev_dbg(di->dev, "Charge state from %d [%s] to %d [%s]\n", | |
1400 | di->charge_state, | |
1401 | charge_state[di->charge_state], | |
1402 | new_state, | |
1403 | charge_state[new_state]); | |
1404 | ||
1405 | di->charge_state = new_state; | |
1406 | } | |
1407 | ||
1408 | static void ab8500_fg_discharge_state_to(struct ab8500_fg *di, | |
0fff22ee | 1409 | enum ab8500_fg_discharge_state new_state) |
13151631 AM |
1410 | { |
1411 | dev_dbg(di->dev, "Disharge state from %d [%s] to %d [%s]\n", | |
1412 | di->discharge_state, | |
1413 | discharge_state[di->discharge_state], | |
1414 | new_state, | |
1415 | discharge_state[new_state]); | |
1416 | ||
1417 | di->discharge_state = new_state; | |
1418 | } | |
1419 | ||
1420 | /** | |
1421 | * ab8500_fg_algorithm_charging() - FG algorithm for when charging | |
1422 | * @di: pointer to the ab8500_fg structure | |
1423 | * | |
1424 | * Battery capacity calculation state machine for when we're charging | |
1425 | */ | |
1426 | static void ab8500_fg_algorithm_charging(struct ab8500_fg *di) | |
1427 | { | |
1428 | /* | |
1429 | * If we change to discharge mode | |
1430 | * we should start with recovery | |
1431 | */ | |
1432 | if (di->discharge_state != AB8500_FG_DISCHARGE_INIT_RECOVERY) | |
1433 | ab8500_fg_discharge_state_to(di, | |
1434 | AB8500_FG_DISCHARGE_INIT_RECOVERY); | |
1435 | ||
1436 | switch (di->charge_state) { | |
1437 | case AB8500_FG_CHARGE_INIT: | |
1438 | di->fg_samples = SEC_TO_SAMPLE( | |
b0284de0 | 1439 | di->bm->fg_params->accu_charging); |
13151631 AM |
1440 | |
1441 | ab8500_fg_coulomb_counter(di, true); | |
1442 | ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_READOUT); | |
1443 | ||
1444 | break; | |
1445 | ||
1446 | case AB8500_FG_CHARGE_READOUT: | |
1447 | /* | |
1448 | * Read the FG and calculate the new capacity | |
1449 | */ | |
1450 | mutex_lock(&di->cc_lock); | |
ea402401 | 1451 | if (!di->flags.conv_done && !di->flags.force_full) { |
13151631 AM |
1452 | /* Wasn't the CC IRQ that got us here */ |
1453 | mutex_unlock(&di->cc_lock); | |
1454 | dev_dbg(di->dev, "%s CC conv not done\n", | |
1455 | __func__); | |
1456 | ||
1457 | break; | |
1458 | } | |
1459 | di->flags.conv_done = false; | |
1460 | mutex_unlock(&di->cc_lock); | |
1461 | ||
1462 | ab8500_fg_calc_cap_charging(di); | |
1463 | ||
1464 | break; | |
1465 | ||
1466 | default: | |
1467 | break; | |
1468 | } | |
1469 | ||
1470 | /* Check capacity limits */ | |
1471 | ab8500_fg_check_capacity_limits(di, false); | |
1472 | } | |
1473 | ||
1474 | static void force_capacity(struct ab8500_fg *di) | |
1475 | { | |
1476 | int cap; | |
1477 | ||
1478 | ab8500_fg_clear_cap_samples(di); | |
1479 | cap = di->bat_cap.user_mah; | |
1480 | if (cap > di->bat_cap.max_mah_design) { | |
1481 | dev_dbg(di->dev, "Remaining cap %d can't be bigger than total" | |
1482 | " %d\n", cap, di->bat_cap.max_mah_design); | |
1483 | cap = di->bat_cap.max_mah_design; | |
1484 | } | |
1485 | ab8500_fg_fill_cap_sample(di, di->bat_cap.user_mah); | |
1486 | di->bat_cap.permille = ab8500_fg_convert_mah_to_permille(di, cap); | |
1487 | di->bat_cap.mah = cap; | |
1488 | ab8500_fg_check_capacity_limits(di, true); | |
1489 | } | |
1490 | ||
1491 | static bool check_sysfs_capacity(struct ab8500_fg *di) | |
1492 | { | |
1493 | int cap, lower, upper; | |
1494 | int cap_permille; | |
1495 | ||
1496 | cap = di->bat_cap.user_mah; | |
1497 | ||
1498 | cap_permille = ab8500_fg_convert_mah_to_permille(di, | |
1499 | di->bat_cap.user_mah); | |
1500 | ||
b0284de0 LJ |
1501 | lower = di->bat_cap.permille - di->bm->fg_params->user_cap_limit * 10; |
1502 | upper = di->bat_cap.permille + di->bm->fg_params->user_cap_limit * 10; | |
13151631 AM |
1503 | |
1504 | if (lower < 0) | |
1505 | lower = 0; | |
1506 | /* 1000 is permille, -> 100 percent */ | |
1507 | if (upper > 1000) | |
1508 | upper = 1000; | |
1509 | ||
1510 | dev_dbg(di->dev, "Capacity limits:" | |
1511 | " (Lower: %d User: %d Upper: %d) [user: %d, was: %d]\n", | |
1512 | lower, cap_permille, upper, cap, di->bat_cap.mah); | |
1513 | ||
1514 | /* If within limits, use the saved capacity and exit estimation...*/ | |
1515 | if (cap_permille > lower && cap_permille < upper) { | |
1516 | dev_dbg(di->dev, "OK! Using users cap %d uAh now\n", cap); | |
1517 | force_capacity(di); | |
1518 | return true; | |
1519 | } | |
1520 | dev_dbg(di->dev, "Capacity from user out of limits, ignoring"); | |
1521 | return false; | |
1522 | } | |
1523 | ||
1524 | /** | |
1525 | * ab8500_fg_algorithm_discharging() - FG algorithm for when discharging | |
1526 | * @di: pointer to the ab8500_fg structure | |
1527 | * | |
1528 | * Battery capacity calculation state machine for when we're discharging | |
1529 | */ | |
1530 | static void ab8500_fg_algorithm_discharging(struct ab8500_fg *di) | |
1531 | { | |
1532 | int sleep_time; | |
1533 | ||
1534 | /* If we change to charge mode we should start with init */ | |
1535 | if (di->charge_state != AB8500_FG_CHARGE_INIT) | |
1536 | ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT); | |
1537 | ||
1538 | switch (di->discharge_state) { | |
1539 | case AB8500_FG_DISCHARGE_INIT: | |
1540 | /* We use the FG IRQ to work on */ | |
1541 | di->init_cnt = 0; | |
b0284de0 | 1542 | di->fg_samples = SEC_TO_SAMPLE(di->bm->fg_params->init_timer); |
13151631 AM |
1543 | ab8500_fg_coulomb_counter(di, true); |
1544 | ab8500_fg_discharge_state_to(di, | |
1545 | AB8500_FG_DISCHARGE_INITMEASURING); | |
1546 | ||
1547 | /* Intentional fallthrough */ | |
1548 | case AB8500_FG_DISCHARGE_INITMEASURING: | |
1549 | /* | |
1550 | * Discard a number of samples during startup. | |
1551 | * After that, use compensated voltage for a few | |
1552 | * samples to get an initial capacity. | |
1553 | * Then go to READOUT | |
1554 | */ | |
b0284de0 | 1555 | sleep_time = di->bm->fg_params->init_timer; |
13151631 AM |
1556 | |
1557 | /* Discard the first [x] seconds */ | |
b0284de0 | 1558 | if (di->init_cnt > di->bm->fg_params->init_discard_time) { |
13151631 AM |
1559 | ab8500_fg_calc_cap_discharge_voltage(di, true); |
1560 | ||
1561 | ab8500_fg_check_capacity_limits(di, true); | |
1562 | } | |
1563 | ||
1564 | di->init_cnt += sleep_time; | |
b0284de0 | 1565 | if (di->init_cnt > di->bm->fg_params->init_total_time) |
13151631 AM |
1566 | ab8500_fg_discharge_state_to(di, |
1567 | AB8500_FG_DISCHARGE_READOUT_INIT); | |
1568 | ||
1569 | break; | |
1570 | ||
1571 | case AB8500_FG_DISCHARGE_INIT_RECOVERY: | |
1572 | di->recovery_cnt = 0; | |
1573 | di->recovery_needed = true; | |
1574 | ab8500_fg_discharge_state_to(di, | |
1575 | AB8500_FG_DISCHARGE_RECOVERY); | |
1576 | ||
1577 | /* Intentional fallthrough */ | |
1578 | ||
1579 | case AB8500_FG_DISCHARGE_RECOVERY: | |
b0284de0 | 1580 | sleep_time = di->bm->fg_params->recovery_sleep_timer; |
13151631 AM |
1581 | |
1582 | /* | |
1583 | * We should check the power consumption | |
1584 | * If low, go to READOUT (after x min) or | |
1585 | * RECOVERY_SLEEP if time left. | |
1586 | * If high, go to READOUT | |
1587 | */ | |
1588 | di->inst_curr = ab8500_fg_inst_curr_blocking(di); | |
1589 | ||
1590 | if (ab8500_fg_is_low_curr(di, di->inst_curr)) { | |
1591 | if (di->recovery_cnt > | |
b0284de0 | 1592 | di->bm->fg_params->recovery_total_time) { |
13151631 | 1593 | di->fg_samples = SEC_TO_SAMPLE( |
b0284de0 | 1594 | di->bm->fg_params->accu_high_curr); |
13151631 AM |
1595 | ab8500_fg_coulomb_counter(di, true); |
1596 | ab8500_fg_discharge_state_to(di, | |
1597 | AB8500_FG_DISCHARGE_READOUT); | |
1598 | di->recovery_needed = false; | |
1599 | } else { | |
1600 | queue_delayed_work(di->fg_wq, | |
1601 | &di->fg_periodic_work, | |
1602 | sleep_time * HZ); | |
1603 | } | |
1604 | di->recovery_cnt += sleep_time; | |
1605 | } else { | |
1606 | di->fg_samples = SEC_TO_SAMPLE( | |
b0284de0 | 1607 | di->bm->fg_params->accu_high_curr); |
13151631 AM |
1608 | ab8500_fg_coulomb_counter(di, true); |
1609 | ab8500_fg_discharge_state_to(di, | |
1610 | AB8500_FG_DISCHARGE_READOUT); | |
1611 | } | |
1612 | break; | |
1613 | ||
1614 | case AB8500_FG_DISCHARGE_READOUT_INIT: | |
1615 | di->fg_samples = SEC_TO_SAMPLE( | |
b0284de0 | 1616 | di->bm->fg_params->accu_high_curr); |
13151631 AM |
1617 | ab8500_fg_coulomb_counter(di, true); |
1618 | ab8500_fg_discharge_state_to(di, | |
1619 | AB8500_FG_DISCHARGE_READOUT); | |
1620 | break; | |
1621 | ||
1622 | case AB8500_FG_DISCHARGE_READOUT: | |
1623 | di->inst_curr = ab8500_fg_inst_curr_blocking(di); | |
1624 | ||
1625 | if (ab8500_fg_is_low_curr(di, di->inst_curr)) { | |
1626 | /* Detect mode change */ | |
1627 | if (di->high_curr_mode) { | |
1628 | di->high_curr_mode = false; | |
1629 | di->high_curr_cnt = 0; | |
1630 | } | |
1631 | ||
1632 | if (di->recovery_needed) { | |
1633 | ab8500_fg_discharge_state_to(di, | |
ffaa39d9 | 1634 | AB8500_FG_DISCHARGE_INIT_RECOVERY); |
13151631 AM |
1635 | |
1636 | queue_delayed_work(di->fg_wq, | |
1637 | &di->fg_periodic_work, 0); | |
1638 | ||
1639 | break; | |
1640 | } | |
1641 | ||
1642 | ab8500_fg_calc_cap_discharge_voltage(di, true); | |
1643 | } else { | |
1644 | mutex_lock(&di->cc_lock); | |
1645 | if (!di->flags.conv_done) { | |
1646 | /* Wasn't the CC IRQ that got us here */ | |
1647 | mutex_unlock(&di->cc_lock); | |
1648 | dev_dbg(di->dev, "%s CC conv not done\n", | |
1649 | __func__); | |
1650 | ||
1651 | break; | |
1652 | } | |
1653 | di->flags.conv_done = false; | |
1654 | mutex_unlock(&di->cc_lock); | |
1655 | ||
1656 | /* Detect mode change */ | |
1657 | if (!di->high_curr_mode) { | |
1658 | di->high_curr_mode = true; | |
1659 | di->high_curr_cnt = 0; | |
1660 | } | |
1661 | ||
1662 | di->high_curr_cnt += | |
b0284de0 | 1663 | di->bm->fg_params->accu_high_curr; |
13151631 | 1664 | if (di->high_curr_cnt > |
b0284de0 | 1665 | di->bm->fg_params->high_curr_time) |
13151631 AM |
1666 | di->recovery_needed = true; |
1667 | ||
1668 | ab8500_fg_calc_cap_discharge_fg(di); | |
1669 | } | |
1670 | ||
1671 | ab8500_fg_check_capacity_limits(di, false); | |
1672 | ||
1673 | break; | |
1674 | ||
1675 | case AB8500_FG_DISCHARGE_WAKEUP: | |
13151631 AM |
1676 | ab8500_fg_calc_cap_discharge_voltage(di, true); |
1677 | ||
1678 | di->fg_samples = SEC_TO_SAMPLE( | |
b0284de0 | 1679 | di->bm->fg_params->accu_high_curr); |
13151631 AM |
1680 | ab8500_fg_coulomb_counter(di, true); |
1681 | ab8500_fg_discharge_state_to(di, | |
1682 | AB8500_FG_DISCHARGE_READOUT); | |
1683 | ||
1684 | ab8500_fg_check_capacity_limits(di, false); | |
1685 | ||
1686 | break; | |
1687 | ||
1688 | default: | |
1689 | break; | |
1690 | } | |
1691 | } | |
1692 | ||
1693 | /** | |
1694 | * ab8500_fg_algorithm_calibrate() - Internal columb counter offset calibration | |
1695 | * @di: pointer to the ab8500_fg structure | |
1696 | * | |
1697 | */ | |
1698 | static void ab8500_fg_algorithm_calibrate(struct ab8500_fg *di) | |
1699 | { | |
1700 | int ret; | |
1701 | ||
1702 | switch (di->calib_state) { | |
1703 | case AB8500_FG_CALIB_INIT: | |
1704 | dev_dbg(di->dev, "Calibration ongoing...\n"); | |
1705 | ||
1706 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1707 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
1708 | CC_INT_CAL_N_AVG_MASK, CC_INT_CAL_SAMPLES_8); | |
1709 | if (ret < 0) | |
1710 | goto err; | |
1711 | ||
1712 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1713 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
1714 | CC_INTAVGOFFSET_ENA, CC_INTAVGOFFSET_ENA); | |
1715 | if (ret < 0) | |
1716 | goto err; | |
1717 | di->calib_state = AB8500_FG_CALIB_WAIT; | |
1718 | break; | |
1719 | case AB8500_FG_CALIB_END: | |
1720 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1721 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
1722 | CC_MUXOFFSET, CC_MUXOFFSET); | |
1723 | if (ret < 0) | |
1724 | goto err; | |
1725 | di->flags.calibrate = false; | |
1726 | dev_dbg(di->dev, "Calibration done...\n"); | |
1727 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
1728 | break; | |
1729 | case AB8500_FG_CALIB_WAIT: | |
1730 | dev_dbg(di->dev, "Calibration WFI\n"); | |
1731 | default: | |
1732 | break; | |
1733 | } | |
1734 | return; | |
1735 | err: | |
1736 | /* Something went wrong, don't calibrate then */ | |
1737 | dev_err(di->dev, "failed to calibrate the CC\n"); | |
1738 | di->flags.calibrate = false; | |
1739 | di->calib_state = AB8500_FG_CALIB_INIT; | |
1740 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
1741 | } | |
1742 | ||
1743 | /** | |
1744 | * ab8500_fg_algorithm() - Entry point for the FG algorithm | |
1745 | * @di: pointer to the ab8500_fg structure | |
1746 | * | |
1747 | * Entry point for the battery capacity calculation state machine | |
1748 | */ | |
1749 | static void ab8500_fg_algorithm(struct ab8500_fg *di) | |
1750 | { | |
1751 | if (di->flags.calibrate) | |
1752 | ab8500_fg_algorithm_calibrate(di); | |
1753 | else { | |
1754 | if (di->flags.charging) | |
1755 | ab8500_fg_algorithm_charging(di); | |
1756 | else | |
1757 | ab8500_fg_algorithm_discharging(di); | |
1758 | } | |
1759 | ||
64277618 | 1760 | dev_dbg(di->dev, "[FG_DATA] %d %d %d %d %d %d %d %d %d %d " |
13151631 AM |
1761 | "%d %d %d %d %d %d %d\n", |
1762 | di->bat_cap.max_mah_design, | |
64277618 | 1763 | di->bat_cap.max_mah, |
13151631 AM |
1764 | di->bat_cap.mah, |
1765 | di->bat_cap.permille, | |
1766 | di->bat_cap.level, | |
1767 | di->bat_cap.prev_mah, | |
1768 | di->bat_cap.prev_percent, | |
1769 | di->bat_cap.prev_level, | |
1770 | di->vbat, | |
1771 | di->inst_curr, | |
1772 | di->avg_curr, | |
1773 | di->accu_charge, | |
1774 | di->flags.charging, | |
1775 | di->charge_state, | |
1776 | di->discharge_state, | |
1777 | di->high_curr_mode, | |
1778 | di->recovery_needed); | |
1779 | } | |
1780 | ||
1781 | /** | |
1782 | * ab8500_fg_periodic_work() - Run the FG state machine periodically | |
1783 | * @work: pointer to the work_struct structure | |
1784 | * | |
1785 | * Work queue function for periodic work | |
1786 | */ | |
1787 | static void ab8500_fg_periodic_work(struct work_struct *work) | |
1788 | { | |
1789 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, | |
1790 | fg_periodic_work.work); | |
1791 | ||
1792 | if (di->init_capacity) { | |
13151631 AM |
1793 | /* Get an initial capacity calculation */ |
1794 | ab8500_fg_calc_cap_discharge_voltage(di, true); | |
1795 | ab8500_fg_check_capacity_limits(di, true); | |
1796 | di->init_capacity = false; | |
1797 | ||
1798 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
1799 | } else if (di->flags.user_cap) { | |
1800 | if (check_sysfs_capacity(di)) { | |
1801 | ab8500_fg_check_capacity_limits(di, true); | |
1802 | if (di->flags.charging) | |
1803 | ab8500_fg_charge_state_to(di, | |
1804 | AB8500_FG_CHARGE_INIT); | |
1805 | else | |
1806 | ab8500_fg_discharge_state_to(di, | |
1807 | AB8500_FG_DISCHARGE_READOUT_INIT); | |
1808 | } | |
1809 | di->flags.user_cap = false; | |
1810 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
1811 | } else | |
1812 | ab8500_fg_algorithm(di); | |
1813 | ||
1814 | } | |
1815 | ||
1816 | /** | |
1817 | * ab8500_fg_check_hw_failure_work() - Check OVV_BAT condition | |
1818 | * @work: pointer to the work_struct structure | |
1819 | * | |
1820 | * Work queue function for checking the OVV_BAT condition | |
1821 | */ | |
1822 | static void ab8500_fg_check_hw_failure_work(struct work_struct *work) | |
1823 | { | |
1824 | int ret; | |
1825 | u8 reg_value; | |
1826 | ||
1827 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, | |
1828 | fg_check_hw_failure_work.work); | |
1829 | ||
1830 | /* | |
1831 | * If we have had a battery over-voltage situation, | |
1832 | * check ovv-bit to see if it should be reset. | |
1833 | */ | |
8bcf3b39 HB |
1834 | ret = abx500_get_register_interruptible(di->dev, |
1835 | AB8500_CHARGER, AB8500_CH_STAT_REG, | |
1836 | ®_value); | |
1837 | if (ret < 0) { | |
1838 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
1839 | return; | |
1840 | } | |
1841 | if ((reg_value & BATT_OVV) == BATT_OVV) { | |
1842 | if (!di->flags.bat_ovv) { | |
1843 | dev_dbg(di->dev, "Battery OVV\n"); | |
1844 | di->flags.bat_ovv = true; | |
297d716f | 1845 | power_supply_changed(di->fg_psy); |
13151631 | 1846 | } |
13151631 AM |
1847 | /* Not yet recovered from ovv, reschedule this test */ |
1848 | queue_delayed_work(di->fg_wq, &di->fg_check_hw_failure_work, | |
41ce2565 | 1849 | HZ); |
8bcf3b39 HB |
1850 | } else { |
1851 | dev_dbg(di->dev, "Battery recovered from OVV\n"); | |
1852 | di->flags.bat_ovv = false; | |
297d716f | 1853 | power_supply_changed(di->fg_psy); |
13151631 AM |
1854 | } |
1855 | } | |
1856 | ||
1857 | /** | |
1858 | * ab8500_fg_low_bat_work() - Check LOW_BAT condition | |
1859 | * @work: pointer to the work_struct structure | |
1860 | * | |
1861 | * Work queue function for checking the LOW_BAT condition | |
1862 | */ | |
1863 | static void ab8500_fg_low_bat_work(struct work_struct *work) | |
1864 | { | |
1865 | int vbat; | |
1866 | ||
1867 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, | |
1868 | fg_low_bat_work.work); | |
1869 | ||
1870 | vbat = ab8500_fg_bat_voltage(di); | |
1871 | ||
1872 | /* Check if LOW_BAT still fulfilled */ | |
b0284de0 | 1873 | if (vbat < di->bm->fg_params->lowbat_threshold) { |
75f2a219 HB |
1874 | /* Is it time to shut down? */ |
1875 | if (di->low_bat_cnt < 1) { | |
1876 | di->flags.low_bat = true; | |
1877 | dev_warn(di->dev, "Shut down pending...\n"); | |
1878 | } else { | |
1879 | /* | |
1880 | * Else we need to re-schedule this check to be able to detect | |
1881 | * if the voltage increases again during charging or | |
1882 | * due to decreasing load. | |
1883 | */ | |
1884 | di->low_bat_cnt--; | |
1885 | dev_warn(di->dev, "Battery voltage still LOW\n"); | |
1886 | queue_delayed_work(di->fg_wq, &di->fg_low_bat_work, | |
1887 | round_jiffies(LOW_BAT_CHECK_INTERVAL)); | |
1888 | } | |
13151631 | 1889 | } else { |
75f2a219 HB |
1890 | di->flags.low_bat_delay = false; |
1891 | di->low_bat_cnt = 10; | |
13151631 AM |
1892 | dev_warn(di->dev, "Battery voltage OK again\n"); |
1893 | } | |
1894 | ||
1895 | /* This is needed to dispatch LOW_BAT */ | |
1896 | ab8500_fg_check_capacity_limits(di, false); | |
13151631 AM |
1897 | } |
1898 | ||
1899 | /** | |
1900 | * ab8500_fg_battok_calc - calculate the bit pattern corresponding | |
1901 | * to the target voltage. | |
1902 | * @di: pointer to the ab8500_fg structure | |
32c52eff | 1903 | * @target: target voltage |
13151631 AM |
1904 | * |
1905 | * Returns bit pattern closest to the target voltage | |
1906 | * valid return values are 0-14. (0-BATT_OK_MAX_NR_INCREMENTS) | |
1907 | */ | |
1908 | ||
1909 | static int ab8500_fg_battok_calc(struct ab8500_fg *di, int target) | |
1910 | { | |
1911 | if (target > BATT_OK_MIN + | |
1912 | (BATT_OK_INCREMENT * BATT_OK_MAX_NR_INCREMENTS)) | |
1913 | return BATT_OK_MAX_NR_INCREMENTS; | |
1914 | if (target < BATT_OK_MIN) | |
1915 | return 0; | |
1916 | return (target - BATT_OK_MIN) / BATT_OK_INCREMENT; | |
1917 | } | |
1918 | ||
1919 | /** | |
1920 | * ab8500_fg_battok_init_hw_register - init battok levels | |
1921 | * @di: pointer to the ab8500_fg structure | |
1922 | * | |
1923 | */ | |
1924 | ||
1925 | static int ab8500_fg_battok_init_hw_register(struct ab8500_fg *di) | |
1926 | { | |
1927 | int selected; | |
1928 | int sel0; | |
1929 | int sel1; | |
1930 | int cbp_sel0; | |
1931 | int cbp_sel1; | |
1932 | int ret; | |
1933 | int new_val; | |
1934 | ||
b0284de0 LJ |
1935 | sel0 = di->bm->fg_params->battok_falling_th_sel0; |
1936 | sel1 = di->bm->fg_params->battok_raising_th_sel1; | |
13151631 AM |
1937 | |
1938 | cbp_sel0 = ab8500_fg_battok_calc(di, sel0); | |
1939 | cbp_sel1 = ab8500_fg_battok_calc(di, sel1); | |
1940 | ||
1941 | selected = BATT_OK_MIN + cbp_sel0 * BATT_OK_INCREMENT; | |
1942 | ||
1943 | if (selected != sel0) | |
1944 | dev_warn(di->dev, "Invalid voltage step:%d, using %d %d\n", | |
1945 | sel0, selected, cbp_sel0); | |
1946 | ||
1947 | selected = BATT_OK_MIN + cbp_sel1 * BATT_OK_INCREMENT; | |
1948 | ||
1949 | if (selected != sel1) | |
1950 | dev_warn(di->dev, "Invalid voltage step:%d, using %d %d\n", | |
1951 | sel1, selected, cbp_sel1); | |
1952 | ||
1953 | new_val = cbp_sel0 | (cbp_sel1 << 4); | |
1954 | ||
1955 | dev_dbg(di->dev, "using: %x %d %d\n", new_val, cbp_sel0, cbp_sel1); | |
1956 | ret = abx500_set_register_interruptible(di->dev, AB8500_SYS_CTRL2_BLOCK, | |
1957 | AB8500_BATT_OK_REG, new_val); | |
1958 | return ret; | |
1959 | } | |
1960 | ||
1961 | /** | |
1962 | * ab8500_fg_instant_work() - Run the FG state machine instantly | |
1963 | * @work: pointer to the work_struct structure | |
1964 | * | |
1965 | * Work queue function for instant work | |
1966 | */ | |
1967 | static void ab8500_fg_instant_work(struct work_struct *work) | |
1968 | { | |
1969 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, fg_work); | |
1970 | ||
1971 | ab8500_fg_algorithm(di); | |
1972 | } | |
1973 | ||
1974 | /** | |
7a2cf9ba | 1975 | * ab8500_fg_cc_data_end_handler() - end of data conversion isr. |
13151631 AM |
1976 | * @irq: interrupt number |
1977 | * @_di: pointer to the ab8500_fg structure | |
1978 | * | |
1979 | * Returns IRQ status(IRQ_HANDLED) | |
1980 | */ | |
1981 | static irqreturn_t ab8500_fg_cc_data_end_handler(int irq, void *_di) | |
1982 | { | |
1983 | struct ab8500_fg *di = _di; | |
3988a4df JB |
1984 | if (!di->nbr_cceoc_irq_cnt) { |
1985 | di->nbr_cceoc_irq_cnt++; | |
1986 | complete(&di->ab8500_fg_started); | |
1987 | } else { | |
1988 | di->nbr_cceoc_irq_cnt = 0; | |
1989 | complete(&di->ab8500_fg_complete); | |
1990 | } | |
13151631 AM |
1991 | return IRQ_HANDLED; |
1992 | } | |
1993 | ||
1994 | /** | |
7a2cf9ba | 1995 | * ab8500_fg_cc_int_calib_handler () - end of calibration isr. |
13151631 AM |
1996 | * @irq: interrupt number |
1997 | * @_di: pointer to the ab8500_fg structure | |
1998 | * | |
1999 | * Returns IRQ status(IRQ_HANDLED) | |
2000 | */ | |
2001 | static irqreturn_t ab8500_fg_cc_int_calib_handler(int irq, void *_di) | |
2002 | { | |
2003 | struct ab8500_fg *di = _di; | |
2004 | di->calib_state = AB8500_FG_CALIB_END; | |
2005 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
2006 | return IRQ_HANDLED; | |
2007 | } | |
2008 | ||
2009 | /** | |
2010 | * ab8500_fg_cc_convend_handler() - isr to get battery avg current. | |
2011 | * @irq: interrupt number | |
2012 | * @_di: pointer to the ab8500_fg structure | |
2013 | * | |
2014 | * Returns IRQ status(IRQ_HANDLED) | |
2015 | */ | |
2016 | static irqreturn_t ab8500_fg_cc_convend_handler(int irq, void *_di) | |
2017 | { | |
2018 | struct ab8500_fg *di = _di; | |
2019 | ||
2020 | queue_work(di->fg_wq, &di->fg_acc_cur_work); | |
2021 | ||
2022 | return IRQ_HANDLED; | |
2023 | } | |
2024 | ||
2025 | /** | |
2026 | * ab8500_fg_batt_ovv_handler() - Battery OVV occured | |
2027 | * @irq: interrupt number | |
2028 | * @_di: pointer to the ab8500_fg structure | |
2029 | * | |
2030 | * Returns IRQ status(IRQ_HANDLED) | |
2031 | */ | |
2032 | static irqreturn_t ab8500_fg_batt_ovv_handler(int irq, void *_di) | |
2033 | { | |
2034 | struct ab8500_fg *di = _di; | |
2035 | ||
2036 | dev_dbg(di->dev, "Battery OVV\n"); | |
13151631 AM |
2037 | |
2038 | /* Schedule a new HW failure check */ | |
2039 | queue_delayed_work(di->fg_wq, &di->fg_check_hw_failure_work, 0); | |
2040 | ||
2041 | return IRQ_HANDLED; | |
2042 | } | |
2043 | ||
2044 | /** | |
2045 | * ab8500_fg_lowbatf_handler() - Battery voltage is below LOW threshold | |
2046 | * @irq: interrupt number | |
2047 | * @_di: pointer to the ab8500_fg structure | |
2048 | * | |
2049 | * Returns IRQ status(IRQ_HANDLED) | |
2050 | */ | |
2051 | static irqreturn_t ab8500_fg_lowbatf_handler(int irq, void *_di) | |
2052 | { | |
2053 | struct ab8500_fg *di = _di; | |
2054 | ||
75f2a219 | 2055 | /* Initiate handling in ab8500_fg_low_bat_work() if not already initiated. */ |
13151631 AM |
2056 | if (!di->flags.low_bat_delay) { |
2057 | dev_warn(di->dev, "Battery voltage is below LOW threshold\n"); | |
2058 | di->flags.low_bat_delay = true; | |
2059 | /* | |
2060 | * Start a timer to check LOW_BAT again after some time | |
2061 | * This is done to avoid shutdown on single voltage dips | |
2062 | */ | |
2063 | queue_delayed_work(di->fg_wq, &di->fg_low_bat_work, | |
2064 | round_jiffies(LOW_BAT_CHECK_INTERVAL)); | |
2065 | } | |
2066 | return IRQ_HANDLED; | |
2067 | } | |
2068 | ||
2069 | /** | |
2070 | * ab8500_fg_get_property() - get the fg properties | |
2071 | * @psy: pointer to the power_supply structure | |
2072 | * @psp: pointer to the power_supply_property structure | |
2073 | * @val: pointer to the power_supply_propval union | |
2074 | * | |
2075 | * This function gets called when an application tries to get the | |
2076 | * fg properties by reading the sysfs files. | |
2077 | * voltage_now: battery voltage | |
2078 | * current_now: battery instant current | |
2079 | * current_avg: battery average current | |
2080 | * charge_full_design: capacity where battery is considered full | |
2081 | * charge_now: battery capacity in nAh | |
2082 | * capacity: capacity in percent | |
2083 | * capacity_level: capacity level | |
2084 | * | |
2085 | * Returns error code in case of failure else 0 on success | |
2086 | */ | |
2087 | static int ab8500_fg_get_property(struct power_supply *psy, | |
2088 | enum power_supply_property psp, | |
2089 | union power_supply_propval *val) | |
2090 | { | |
297d716f | 2091 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
13151631 AM |
2092 | |
2093 | /* | |
2094 | * If battery is identified as unknown and charging of unknown | |
2095 | * batteries is disabled, we always report 100% capacity and | |
2096 | * capacity level UNKNOWN, since we can't calculate | |
2097 | * remaining capacity | |
2098 | */ | |
2099 | ||
2100 | switch (psp) { | |
2101 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
2102 | if (di->flags.bat_ovv) | |
2103 | val->intval = BATT_OVV_VALUE * 1000; | |
2104 | else | |
2105 | val->intval = di->vbat * 1000; | |
2106 | break; | |
2107 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
2108 | val->intval = di->inst_curr * 1000; | |
2109 | break; | |
2110 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
2111 | val->intval = di->avg_curr * 1000; | |
2112 | break; | |
2113 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
2114 | val->intval = ab8500_fg_convert_mah_to_uwh(di, | |
2115 | di->bat_cap.max_mah_design); | |
2116 | break; | |
2117 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
2118 | val->intval = ab8500_fg_convert_mah_to_uwh(di, | |
2119 | di->bat_cap.max_mah); | |
2120 | break; | |
2121 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
b0284de0 | 2122 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
13151631 AM |
2123 | di->flags.batt_id_received) |
2124 | val->intval = ab8500_fg_convert_mah_to_uwh(di, | |
2125 | di->bat_cap.max_mah); | |
2126 | else | |
2127 | val->intval = ab8500_fg_convert_mah_to_uwh(di, | |
2128 | di->bat_cap.prev_mah); | |
2129 | break; | |
2130 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
2131 | val->intval = di->bat_cap.max_mah_design; | |
2132 | break; | |
2133 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
2134 | val->intval = di->bat_cap.max_mah; | |
2135 | break; | |
2136 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
b0284de0 | 2137 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
13151631 AM |
2138 | di->flags.batt_id_received) |
2139 | val->intval = di->bat_cap.max_mah; | |
2140 | else | |
2141 | val->intval = di->bat_cap.prev_mah; | |
2142 | break; | |
2143 | case POWER_SUPPLY_PROP_CAPACITY: | |
e82c5bdb | 2144 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
13151631 AM |
2145 | di->flags.batt_id_received) |
2146 | val->intval = 100; | |
2147 | else | |
2148 | val->intval = di->bat_cap.prev_percent; | |
2149 | break; | |
2150 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: | |
b0284de0 | 2151 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
13151631 AM |
2152 | di->flags.batt_id_received) |
2153 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN; | |
2154 | else | |
2155 | val->intval = di->bat_cap.prev_level; | |
2156 | break; | |
2157 | default: | |
2158 | return -EINVAL; | |
2159 | } | |
2160 | return 0; | |
2161 | } | |
2162 | ||
2163 | static int ab8500_fg_get_ext_psy_data(struct device *dev, void *data) | |
2164 | { | |
2165 | struct power_supply *psy; | |
ea32cea1 AS |
2166 | struct power_supply *ext = dev_get_drvdata(dev); |
2167 | const char **supplicants = (const char **)ext->supplied_to; | |
13151631 AM |
2168 | struct ab8500_fg *di; |
2169 | union power_supply_propval ret; | |
ea32cea1 | 2170 | int j; |
13151631 AM |
2171 | |
2172 | psy = (struct power_supply *)data; | |
297d716f | 2173 | di = power_supply_get_drvdata(psy); |
13151631 AM |
2174 | |
2175 | /* | |
2176 | * For all psy where the name of your driver | |
2177 | * appears in any supplied_to | |
2178 | */ | |
ea32cea1 AS |
2179 | j = match_string(supplicants, ext->num_supplicants, psy->desc->name); |
2180 | if (j < 0) | |
13151631 AM |
2181 | return 0; |
2182 | ||
2183 | /* Go through all properties for the psy */ | |
297d716f | 2184 | for (j = 0; j < ext->desc->num_properties; j++) { |
13151631 | 2185 | enum power_supply_property prop; |
297d716f | 2186 | prop = ext->desc->properties[j]; |
13151631 | 2187 | |
15077fc1 | 2188 | if (power_supply_get_property(ext, prop, &ret)) |
13151631 AM |
2189 | continue; |
2190 | ||
2191 | switch (prop) { | |
2192 | case POWER_SUPPLY_PROP_STATUS: | |
297d716f | 2193 | switch (ext->desc->type) { |
13151631 AM |
2194 | case POWER_SUPPLY_TYPE_BATTERY: |
2195 | switch (ret.intval) { | |
2196 | case POWER_SUPPLY_STATUS_UNKNOWN: | |
2197 | case POWER_SUPPLY_STATUS_DISCHARGING: | |
2198 | case POWER_SUPPLY_STATUS_NOT_CHARGING: | |
2199 | if (!di->flags.charging) | |
2200 | break; | |
2201 | di->flags.charging = false; | |
2202 | di->flags.fully_charged = false; | |
ea402401 MC |
2203 | if (di->bm->capacity_scaling) |
2204 | ab8500_fg_update_cap_scalers(di); | |
13151631 AM |
2205 | queue_work(di->fg_wq, &di->fg_work); |
2206 | break; | |
2207 | case POWER_SUPPLY_STATUS_FULL: | |
2208 | if (di->flags.fully_charged) | |
2209 | break; | |
2210 | di->flags.fully_charged = true; | |
2211 | di->flags.force_full = true; | |
2212 | /* Save current capacity as maximum */ | |
2213 | di->bat_cap.max_mah = di->bat_cap.mah; | |
2214 | queue_work(di->fg_wq, &di->fg_work); | |
2215 | break; | |
2216 | case POWER_SUPPLY_STATUS_CHARGING: | |
ea402401 MC |
2217 | if (di->flags.charging && |
2218 | !di->flags.fully_charged) | |
13151631 AM |
2219 | break; |
2220 | di->flags.charging = true; | |
2221 | di->flags.fully_charged = false; | |
ea402401 MC |
2222 | if (di->bm->capacity_scaling) |
2223 | ab8500_fg_update_cap_scalers(di); | |
13151631 AM |
2224 | queue_work(di->fg_wq, &di->fg_work); |
2225 | break; | |
2226 | }; | |
2227 | default: | |
2228 | break; | |
2229 | }; | |
2230 | break; | |
2231 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
297d716f | 2232 | switch (ext->desc->type) { |
13151631 | 2233 | case POWER_SUPPLY_TYPE_BATTERY: |
1a793a10 RK |
2234 | if (!di->flags.batt_id_received && |
2235 | di->bm->batt_id != BATTERY_UNKNOWN) { | |
c34a61b4 AV |
2236 | const struct abx500_battery_type *b; |
2237 | ||
b0284de0 | 2238 | b = &(di->bm->bat_type[di->bm->batt_id]); |
13151631 AM |
2239 | |
2240 | di->flags.batt_id_received = true; | |
2241 | ||
2242 | di->bat_cap.max_mah_design = | |
2243 | MILLI_TO_MICRO * | |
2244 | b->charge_full_design; | |
2245 | ||
2246 | di->bat_cap.max_mah = | |
2247 | di->bat_cap.max_mah_design; | |
2248 | ||
2249 | di->vbat_nom = b->nominal_voltage; | |
2250 | } | |
2251 | ||
2252 | if (ret.intval) | |
2253 | di->flags.batt_unknown = false; | |
2254 | else | |
2255 | di->flags.batt_unknown = true; | |
2256 | break; | |
2257 | default: | |
2258 | break; | |
2259 | } | |
2260 | break; | |
2261 | case POWER_SUPPLY_PROP_TEMP: | |
297d716f | 2262 | switch (ext->desc->type) { |
13151631 | 2263 | case POWER_SUPPLY_TYPE_BATTERY: |
ea402401 MC |
2264 | if (di->flags.batt_id_received) |
2265 | di->bat_temp = ret.intval; | |
13151631 AM |
2266 | break; |
2267 | default: | |
2268 | break; | |
2269 | } | |
2270 | break; | |
2271 | default: | |
2272 | break; | |
2273 | } | |
2274 | } | |
2275 | return 0; | |
2276 | } | |
2277 | ||
2278 | /** | |
2279 | * ab8500_fg_init_hw_registers() - Set up FG related registers | |
2280 | * @di: pointer to the ab8500_fg structure | |
2281 | * | |
2282 | * Set up battery OVV, low battery voltage registers | |
2283 | */ | |
2284 | static int ab8500_fg_init_hw_registers(struct ab8500_fg *di) | |
2285 | { | |
2286 | int ret; | |
2287 | ||
2288 | /* Set VBAT OVV threshold */ | |
2289 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
2290 | AB8500_CHARGER, | |
2291 | AB8500_BATT_OVV, | |
2292 | BATT_OVV_TH_4P75, | |
2293 | BATT_OVV_TH_4P75); | |
2294 | if (ret) { | |
2295 | dev_err(di->dev, "failed to set BATT_OVV\n"); | |
2296 | goto out; | |
2297 | } | |
2298 | ||
2299 | /* Enable VBAT OVV detection */ | |
2300 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
2301 | AB8500_CHARGER, | |
2302 | AB8500_BATT_OVV, | |
2303 | BATT_OVV_ENA, | |
2304 | BATT_OVV_ENA); | |
2305 | if (ret) { | |
2306 | dev_err(di->dev, "failed to enable BATT_OVV\n"); | |
2307 | goto out; | |
2308 | } | |
2309 | ||
2310 | /* Low Battery Voltage */ | |
2311 | ret = abx500_set_register_interruptible(di->dev, | |
2312 | AB8500_SYS_CTRL2_BLOCK, | |
2313 | AB8500_LOW_BAT_REG, | |
2314 | ab8500_volt_to_regval( | |
b0284de0 | 2315 | di->bm->fg_params->lowbat_threshold) << 1 | |
13151631 AM |
2316 | LOW_BAT_ENABLE); |
2317 | if (ret) { | |
2318 | dev_err(di->dev, "%s write failed\n", __func__); | |
2319 | goto out; | |
2320 | } | |
2321 | ||
2322 | /* Battery OK threshold */ | |
2323 | ret = ab8500_fg_battok_init_hw_register(di); | |
2324 | if (ret) { | |
2325 | dev_err(di->dev, "BattOk init write failed.\n"); | |
2326 | goto out; | |
2327 | } | |
93ff722e LJ |
2328 | |
2329 | if (((is_ab8505(di->parent) || is_ab9540(di->parent)) && | |
2330 | abx500_get_chip_id(di->dev) >= AB8500_CUT2P0) | |
2331 | || is_ab8540(di->parent)) { | |
2332 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2333 | AB8505_RTC_PCUT_MAX_TIME_REG, di->bm->fg_params->pcut_max_time); | |
2334 | ||
2335 | if (ret) { | |
2336 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_MAX_TIME_REG\n", __func__); | |
2337 | goto out; | |
2338 | }; | |
2339 | ||
2340 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2341 | AB8505_RTC_PCUT_FLAG_TIME_REG, di->bm->fg_params->pcut_flag_time); | |
2342 | ||
2343 | if (ret) { | |
2344 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_FLAG_TIME_REG\n", __func__); | |
2345 | goto out; | |
2346 | }; | |
2347 | ||
2348 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2349 | AB8505_RTC_PCUT_RESTART_REG, di->bm->fg_params->pcut_max_restart); | |
2350 | ||
2351 | if (ret) { | |
2352 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_RESTART_REG\n", __func__); | |
2353 | goto out; | |
2354 | }; | |
2355 | ||
2356 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2357 | AB8505_RTC_PCUT_DEBOUNCE_REG, di->bm->fg_params->pcut_debounce_time); | |
2358 | ||
2359 | if (ret) { | |
2360 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_DEBOUNCE_REG\n", __func__); | |
2361 | goto out; | |
2362 | }; | |
2363 | ||
2364 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2365 | AB8505_RTC_PCUT_CTL_STATUS_REG, di->bm->fg_params->pcut_enable); | |
2366 | ||
2367 | if (ret) { | |
2368 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_CTL_STATUS_REG\n", __func__); | |
2369 | goto out; | |
2370 | }; | |
2371 | } | |
13151631 AM |
2372 | out: |
2373 | return ret; | |
2374 | } | |
2375 | ||
2376 | /** | |
2377 | * ab8500_fg_external_power_changed() - callback for power supply changes | |
2378 | * @psy: pointer to the structure power_supply | |
2379 | * | |
2380 | * This function is the entry point of the pointer external_power_changed | |
2381 | * of the structure power_supply. | |
2382 | * This function gets executed when there is a change in any external power | |
2383 | * supply that this driver needs to be notified of. | |
2384 | */ | |
2385 | static void ab8500_fg_external_power_changed(struct power_supply *psy) | |
2386 | { | |
297d716f | 2387 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
13151631 AM |
2388 | |
2389 | class_for_each_device(power_supply_class, NULL, | |
297d716f | 2390 | di->fg_psy, ab8500_fg_get_ext_psy_data); |
13151631 AM |
2391 | } |
2392 | ||
2393 | /** | |
32c52eff | 2394 | * ab8500_fg_reinit_work() - work to reset the FG algorithm |
13151631 AM |
2395 | * @work: pointer to the work_struct structure |
2396 | * | |
2397 | * Used to reset the current battery capacity to be able to | |
2398 | * retrigger a new voltage base capacity calculation. For | |
2399 | * test and verification purpose. | |
2400 | */ | |
2401 | static void ab8500_fg_reinit_work(struct work_struct *work) | |
2402 | { | |
2403 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, | |
2404 | fg_reinit_work.work); | |
2405 | ||
2406 | if (di->flags.calibrate == false) { | |
2407 | dev_dbg(di->dev, "Resetting FG state machine to init.\n"); | |
2408 | ab8500_fg_clear_cap_samples(di); | |
2409 | ab8500_fg_calc_cap_discharge_voltage(di, true); | |
2410 | ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT); | |
2411 | ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_INIT); | |
2412 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
2413 | ||
2414 | } else { | |
2415 | dev_err(di->dev, "Residual offset calibration ongoing " | |
2416 | "retrying..\n"); | |
2417 | /* Wait one second until next try*/ | |
2418 | queue_delayed_work(di->fg_wq, &di->fg_reinit_work, | |
2419 | round_jiffies(1)); | |
2420 | } | |
2421 | } | |
2422 | ||
13151631 AM |
2423 | /* Exposure to the sysfs interface */ |
2424 | ||
2425 | struct ab8500_fg_sysfs_entry { | |
2426 | struct attribute attr; | |
2427 | ssize_t (*show)(struct ab8500_fg *, char *); | |
2428 | ssize_t (*store)(struct ab8500_fg *, const char *, size_t); | |
2429 | }; | |
2430 | ||
2431 | static ssize_t charge_full_show(struct ab8500_fg *di, char *buf) | |
2432 | { | |
2433 | return sprintf(buf, "%d\n", di->bat_cap.max_mah); | |
2434 | } | |
2435 | ||
2436 | static ssize_t charge_full_store(struct ab8500_fg *di, const char *buf, | |
2437 | size_t count) | |
2438 | { | |
2439 | unsigned long charge_full; | |
4b43eb67 | 2440 | ssize_t ret; |
13151631 | 2441 | |
4b43eb67 | 2442 | ret = kstrtoul(buf, 10, &charge_full); |
13151631 | 2443 | |
5ae2b822 | 2444 | dev_dbg(di->dev, "Ret %zd charge_full %lu", ret, charge_full); |
13151631 AM |
2445 | |
2446 | if (!ret) { | |
2447 | di->bat_cap.max_mah = (int) charge_full; | |
2448 | ret = count; | |
2449 | } | |
2450 | return ret; | |
2451 | } | |
2452 | ||
2453 | static ssize_t charge_now_show(struct ab8500_fg *di, char *buf) | |
2454 | { | |
2455 | return sprintf(buf, "%d\n", di->bat_cap.prev_mah); | |
2456 | } | |
2457 | ||
2458 | static ssize_t charge_now_store(struct ab8500_fg *di, const char *buf, | |
2459 | size_t count) | |
2460 | { | |
2461 | unsigned long charge_now; | |
2462 | ssize_t ret; | |
2463 | ||
4b43eb67 | 2464 | ret = kstrtoul(buf, 10, &charge_now); |
13151631 | 2465 | |
5ae2b822 | 2466 | dev_dbg(di->dev, "Ret %zd charge_now %lu was %d", |
13151631 AM |
2467 | ret, charge_now, di->bat_cap.prev_mah); |
2468 | ||
2469 | if (!ret) { | |
2470 | di->bat_cap.user_mah = (int) charge_now; | |
2471 | di->flags.user_cap = true; | |
2472 | ret = count; | |
2473 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
2474 | } | |
2475 | return ret; | |
2476 | } | |
2477 | ||
2478 | static struct ab8500_fg_sysfs_entry charge_full_attr = | |
2479 | __ATTR(charge_full, 0644, charge_full_show, charge_full_store); | |
2480 | ||
2481 | static struct ab8500_fg_sysfs_entry charge_now_attr = | |
2482 | __ATTR(charge_now, 0644, charge_now_show, charge_now_store); | |
2483 | ||
2484 | static ssize_t | |
2485 | ab8500_fg_show(struct kobject *kobj, struct attribute *attr, char *buf) | |
2486 | { | |
2487 | struct ab8500_fg_sysfs_entry *entry; | |
2488 | struct ab8500_fg *di; | |
2489 | ||
2490 | entry = container_of(attr, struct ab8500_fg_sysfs_entry, attr); | |
2491 | di = container_of(kobj, struct ab8500_fg, fg_kobject); | |
2492 | ||
2493 | if (!entry->show) | |
2494 | return -EIO; | |
2495 | ||
2496 | return entry->show(di, buf); | |
2497 | } | |
2498 | static ssize_t | |
2499 | ab8500_fg_store(struct kobject *kobj, struct attribute *attr, const char *buf, | |
2500 | size_t count) | |
2501 | { | |
2502 | struct ab8500_fg_sysfs_entry *entry; | |
2503 | struct ab8500_fg *di; | |
2504 | ||
2505 | entry = container_of(attr, struct ab8500_fg_sysfs_entry, attr); | |
2506 | di = container_of(kobj, struct ab8500_fg, fg_kobject); | |
2507 | ||
2508 | if (!entry->store) | |
2509 | return -EIO; | |
2510 | ||
2511 | return entry->store(di, buf, count); | |
2512 | } | |
2513 | ||
64eb9b02 | 2514 | static const struct sysfs_ops ab8500_fg_sysfs_ops = { |
13151631 AM |
2515 | .show = ab8500_fg_show, |
2516 | .store = ab8500_fg_store, | |
2517 | }; | |
2518 | ||
2519 | static struct attribute *ab8500_fg_attrs[] = { | |
2520 | &charge_full_attr.attr, | |
2521 | &charge_now_attr.attr, | |
2522 | NULL, | |
2523 | }; | |
2524 | ||
2525 | static struct kobj_type ab8500_fg_ktype = { | |
2526 | .sysfs_ops = &ab8500_fg_sysfs_ops, | |
2527 | .default_attrs = ab8500_fg_attrs, | |
2528 | }; | |
2529 | ||
2530 | /** | |
32c52eff | 2531 | * ab8500_fg_sysfs_exit() - de-init of sysfs entry |
13151631 AM |
2532 | * @di: pointer to the struct ab8500_chargalg |
2533 | * | |
2534 | * This function removes the entry in sysfs. | |
2535 | */ | |
2536 | static void ab8500_fg_sysfs_exit(struct ab8500_fg *di) | |
2537 | { | |
2538 | kobject_del(&di->fg_kobject); | |
2539 | } | |
2540 | ||
2541 | /** | |
32c52eff | 2542 | * ab8500_fg_sysfs_init() - init of sysfs entry |
13151631 AM |
2543 | * @di: pointer to the struct ab8500_chargalg |
2544 | * | |
2545 | * This function adds an entry in sysfs. | |
2546 | * Returns error code in case of failure else 0(on success) | |
2547 | */ | |
2548 | static int ab8500_fg_sysfs_init(struct ab8500_fg *di) | |
2549 | { | |
2550 | int ret = 0; | |
2551 | ||
2552 | ret = kobject_init_and_add(&di->fg_kobject, | |
2553 | &ab8500_fg_ktype, | |
2554 | NULL, "battery"); | |
2555 | if (ret < 0) | |
2556 | dev_err(di->dev, "failed to create sysfs entry\n"); | |
2557 | ||
2558 | return ret; | |
2559 | } | |
93ff722e LJ |
2560 | |
2561 | static ssize_t ab8505_powercut_flagtime_read(struct device *dev, | |
2562 | struct device_attribute *attr, | |
2563 | char *buf) | |
2564 | { | |
2565 | int ret; | |
2566 | u8 reg_value; | |
2567 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2568 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2569 | |
2570 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2571 | AB8505_RTC_PCUT_FLAG_TIME_REG, ®_value); | |
2572 | ||
2573 | if (ret < 0) { | |
2574 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_FLAG_TIME_REG\n"); | |
2575 | goto fail; | |
2576 | } | |
2577 | ||
2578 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F)); | |
2579 | ||
2580 | fail: | |
2581 | return ret; | |
2582 | } | |
2583 | ||
2584 | static ssize_t ab8505_powercut_flagtime_write(struct device *dev, | |
2585 | struct device_attribute *attr, | |
2586 | const char *buf, size_t count) | |
2587 | { | |
2588 | int ret; | |
2589 | long unsigned reg_value; | |
2590 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2591 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2592 | |
2593 | reg_value = simple_strtoul(buf, NULL, 10); | |
2594 | ||
2595 | if (reg_value > 0x7F) { | |
2596 | dev_err(dev, "Incorrect parameter, echo 0 (1.98s) - 127 (15.625ms) for flagtime\n"); | |
2597 | goto fail; | |
2598 | } | |
2599 | ||
2600 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2601 | AB8505_RTC_PCUT_FLAG_TIME_REG, (u8)reg_value); | |
2602 | ||
2603 | if (ret < 0) | |
2604 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_FLAG_TIME_REG\n"); | |
2605 | ||
2606 | fail: | |
2607 | return count; | |
2608 | } | |
2609 | ||
2610 | static ssize_t ab8505_powercut_maxtime_read(struct device *dev, | |
2611 | struct device_attribute *attr, | |
2612 | char *buf) | |
2613 | { | |
2614 | int ret; | |
2615 | u8 reg_value; | |
2616 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2617 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2618 | |
2619 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2620 | AB8505_RTC_PCUT_MAX_TIME_REG, ®_value); | |
2621 | ||
2622 | if (ret < 0) { | |
2623 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_MAX_TIME_REG\n"); | |
2624 | goto fail; | |
2625 | } | |
2626 | ||
2627 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F)); | |
2628 | ||
2629 | fail: | |
2630 | return ret; | |
2631 | ||
2632 | } | |
2633 | ||
2634 | static ssize_t ab8505_powercut_maxtime_write(struct device *dev, | |
2635 | struct device_attribute *attr, | |
2636 | const char *buf, size_t count) | |
2637 | { | |
2638 | int ret; | |
2639 | int reg_value; | |
2640 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2641 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2642 | |
2643 | reg_value = simple_strtoul(buf, NULL, 10); | |
2644 | if (reg_value > 0x7F) { | |
2645 | dev_err(dev, "Incorrect parameter, echo 0 (0.0s) - 127 (1.98s) for maxtime\n"); | |
2646 | goto fail; | |
2647 | } | |
2648 | ||
2649 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2650 | AB8505_RTC_PCUT_MAX_TIME_REG, (u8)reg_value); | |
2651 | ||
2652 | if (ret < 0) | |
2653 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_MAX_TIME_REG\n"); | |
2654 | ||
2655 | fail: | |
2656 | return count; | |
2657 | } | |
2658 | ||
2659 | static ssize_t ab8505_powercut_restart_read(struct device *dev, | |
2660 | struct device_attribute *attr, | |
2661 | char *buf) | |
2662 | { | |
2663 | int ret; | |
2664 | u8 reg_value; | |
2665 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2666 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2667 | |
2668 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2669 | AB8505_RTC_PCUT_RESTART_REG, ®_value); | |
2670 | ||
2671 | if (ret < 0) { | |
2672 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_RESTART_REG\n"); | |
2673 | goto fail; | |
2674 | } | |
2675 | ||
2676 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0xF)); | |
2677 | ||
2678 | fail: | |
2679 | return ret; | |
2680 | } | |
2681 | ||
2682 | static ssize_t ab8505_powercut_restart_write(struct device *dev, | |
2683 | struct device_attribute *attr, | |
2684 | const char *buf, size_t count) | |
2685 | { | |
2686 | int ret; | |
2687 | int reg_value; | |
2688 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2689 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2690 | |
2691 | reg_value = simple_strtoul(buf, NULL, 10); | |
2692 | if (reg_value > 0xF) { | |
2693 | dev_err(dev, "Incorrect parameter, echo 0 - 15 for number of restart\n"); | |
2694 | goto fail; | |
2695 | } | |
2696 | ||
2697 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2698 | AB8505_RTC_PCUT_RESTART_REG, (u8)reg_value); | |
2699 | ||
2700 | if (ret < 0) | |
2701 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_RESTART_REG\n"); | |
2702 | ||
2703 | fail: | |
2704 | return count; | |
2705 | ||
2706 | } | |
2707 | ||
2708 | static ssize_t ab8505_powercut_timer_read(struct device *dev, | |
2709 | struct device_attribute *attr, | |
2710 | char *buf) | |
2711 | { | |
2712 | int ret; | |
2713 | u8 reg_value; | |
2714 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2715 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2716 | |
2717 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2718 | AB8505_RTC_PCUT_TIME_REG, ®_value); | |
2719 | ||
2720 | if (ret < 0) { | |
2721 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_TIME_REG\n"); | |
2722 | goto fail; | |
2723 | } | |
2724 | ||
2725 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F)); | |
2726 | ||
2727 | fail: | |
2728 | return ret; | |
2729 | } | |
2730 | ||
2731 | static ssize_t ab8505_powercut_restart_counter_read(struct device *dev, | |
2732 | struct device_attribute *attr, | |
2733 | char *buf) | |
2734 | { | |
2735 | int ret; | |
2736 | u8 reg_value; | |
2737 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2738 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2739 | |
2740 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2741 | AB8505_RTC_PCUT_RESTART_REG, ®_value); | |
2742 | ||
2743 | if (ret < 0) { | |
2744 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_RESTART_REG\n"); | |
2745 | goto fail; | |
2746 | } | |
2747 | ||
2748 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0xF0) >> 4); | |
2749 | ||
2750 | fail: | |
2751 | return ret; | |
2752 | } | |
2753 | ||
2754 | static ssize_t ab8505_powercut_read(struct device *dev, | |
2755 | struct device_attribute *attr, | |
2756 | char *buf) | |
2757 | { | |
2758 | int ret; | |
2759 | u8 reg_value; | |
2760 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2761 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2762 | |
2763 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2764 | AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value); | |
2765 | ||
2766 | if (ret < 0) | |
2767 | goto fail; | |
2768 | ||
2769 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x1)); | |
2770 | ||
2771 | fail: | |
2772 | return ret; | |
2773 | } | |
2774 | ||
2775 | static ssize_t ab8505_powercut_write(struct device *dev, | |
2776 | struct device_attribute *attr, | |
2777 | const char *buf, size_t count) | |
2778 | { | |
2779 | int ret; | |
2780 | int reg_value; | |
2781 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2782 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2783 | |
2784 | reg_value = simple_strtoul(buf, NULL, 10); | |
2785 | if (reg_value > 0x1) { | |
2786 | dev_err(dev, "Incorrect parameter, echo 0/1 to disable/enable Pcut feature\n"); | |
2787 | goto fail; | |
2788 | } | |
2789 | ||
2790 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2791 | AB8505_RTC_PCUT_CTL_STATUS_REG, (u8)reg_value); | |
2792 | ||
2793 | if (ret < 0) | |
2794 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_CTL_STATUS_REG\n"); | |
2795 | ||
2796 | fail: | |
2797 | return count; | |
2798 | } | |
2799 | ||
2800 | static ssize_t ab8505_powercut_flag_read(struct device *dev, | |
2801 | struct device_attribute *attr, | |
2802 | char *buf) | |
2803 | { | |
2804 | ||
2805 | int ret; | |
2806 | u8 reg_value; | |
2807 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2808 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2809 | |
2810 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2811 | AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value); | |
2812 | ||
2813 | if (ret < 0) { | |
2814 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_CTL_STATUS_REG\n"); | |
2815 | goto fail; | |
2816 | } | |
2817 | ||
2818 | return scnprintf(buf, PAGE_SIZE, "%d\n", ((reg_value & 0x10) >> 4)); | |
2819 | ||
2820 | fail: | |
2821 | return ret; | |
2822 | } | |
2823 | ||
2824 | static ssize_t ab8505_powercut_debounce_read(struct device *dev, | |
2825 | struct device_attribute *attr, | |
2826 | char *buf) | |
2827 | { | |
2828 | int ret; | |
2829 | u8 reg_value; | |
2830 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2831 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2832 | |
2833 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2834 | AB8505_RTC_PCUT_DEBOUNCE_REG, ®_value); | |
2835 | ||
2836 | if (ret < 0) { | |
2837 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_DEBOUNCE_REG\n"); | |
2838 | goto fail; | |
2839 | } | |
2840 | ||
2841 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7)); | |
2842 | ||
2843 | fail: | |
2844 | return ret; | |
2845 | } | |
2846 | ||
2847 | static ssize_t ab8505_powercut_debounce_write(struct device *dev, | |
2848 | struct device_attribute *attr, | |
2849 | const char *buf, size_t count) | |
2850 | { | |
2851 | int ret; | |
2852 | int reg_value; | |
2853 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2854 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2855 | |
2856 | reg_value = simple_strtoul(buf, NULL, 10); | |
2857 | if (reg_value > 0x7) { | |
2858 | dev_err(dev, "Incorrect parameter, echo 0 to 7 for debounce setting\n"); | |
2859 | goto fail; | |
2860 | } | |
2861 | ||
2862 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2863 | AB8505_RTC_PCUT_DEBOUNCE_REG, (u8)reg_value); | |
2864 | ||
2865 | if (ret < 0) | |
2866 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_DEBOUNCE_REG\n"); | |
2867 | ||
2868 | fail: | |
2869 | return count; | |
2870 | } | |
2871 | ||
2872 | static ssize_t ab8505_powercut_enable_status_read(struct device *dev, | |
2873 | struct device_attribute *attr, | |
2874 | char *buf) | |
2875 | { | |
2876 | int ret; | |
2877 | u8 reg_value; | |
2878 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2879 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2880 | |
2881 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2882 | AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value); | |
2883 | ||
2884 | if (ret < 0) { | |
2885 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_CTL_STATUS_REG\n"); | |
2886 | goto fail; | |
2887 | } | |
2888 | ||
2889 | return scnprintf(buf, PAGE_SIZE, "%d\n", ((reg_value & 0x20) >> 5)); | |
2890 | ||
2891 | fail: | |
2892 | return ret; | |
2893 | } | |
2894 | ||
2895 | static struct device_attribute ab8505_fg_sysfs_psy_attrs[] = { | |
2896 | __ATTR(powercut_flagtime, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2897 | ab8505_powercut_flagtime_read, ab8505_powercut_flagtime_write), | |
2898 | __ATTR(powercut_maxtime, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2899 | ab8505_powercut_maxtime_read, ab8505_powercut_maxtime_write), | |
2900 | __ATTR(powercut_restart_max, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2901 | ab8505_powercut_restart_read, ab8505_powercut_restart_write), | |
2902 | __ATTR(powercut_timer, S_IRUGO, ab8505_powercut_timer_read, NULL), | |
2903 | __ATTR(powercut_restart_counter, S_IRUGO, | |
2904 | ab8505_powercut_restart_counter_read, NULL), | |
2905 | __ATTR(powercut_enable, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2906 | ab8505_powercut_read, ab8505_powercut_write), | |
2907 | __ATTR(powercut_flag, S_IRUGO, ab8505_powercut_flag_read, NULL), | |
2908 | __ATTR(powercut_debounce_time, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2909 | ab8505_powercut_debounce_read, ab8505_powercut_debounce_write), | |
2910 | __ATTR(powercut_enable_status, S_IRUGO, | |
2911 | ab8505_powercut_enable_status_read, NULL), | |
2912 | }; | |
2913 | ||
c75cfa9e | 2914 | static int ab8500_fg_sysfs_psy_create_attrs(struct ab8500_fg *di) |
93ff722e | 2915 | { |
7881c647 | 2916 | unsigned int i; |
93ff722e LJ |
2917 | |
2918 | if (((is_ab8505(di->parent) || is_ab9540(di->parent)) && | |
c75cfa9e | 2919 | abx500_get_chip_id(di->dev) >= AB8500_CUT2P0) |
93ff722e | 2920 | || is_ab8540(di->parent)) { |
7881c647 | 2921 | for (i = 0; i < ARRAY_SIZE(ab8505_fg_sysfs_psy_attrs); i++) |
297d716f | 2922 | if (device_create_file(&di->fg_psy->dev, |
7881c647 | 2923 | &ab8505_fg_sysfs_psy_attrs[i])) |
93ff722e LJ |
2924 | goto sysfs_psy_create_attrs_failed_ab8505; |
2925 | } | |
2926 | return 0; | |
2927 | sysfs_psy_create_attrs_failed_ab8505: | |
297d716f | 2928 | dev_err(&di->fg_psy->dev, "Failed creating sysfs psy attrs for ab8505.\n"); |
7881c647 | 2929 | while (i--) |
297d716f KK |
2930 | device_remove_file(&di->fg_psy->dev, |
2931 | &ab8505_fg_sysfs_psy_attrs[i]); | |
93ff722e LJ |
2932 | |
2933 | return -EIO; | |
2934 | } | |
2935 | ||
c75cfa9e | 2936 | static void ab8500_fg_sysfs_psy_remove_attrs(struct ab8500_fg *di) |
93ff722e LJ |
2937 | { |
2938 | unsigned int i; | |
93ff722e LJ |
2939 | |
2940 | if (((is_ab8505(di->parent) || is_ab9540(di->parent)) && | |
c75cfa9e | 2941 | abx500_get_chip_id(di->dev) >= AB8500_CUT2P0) |
93ff722e LJ |
2942 | || is_ab8540(di->parent)) { |
2943 | for (i = 0; i < ARRAY_SIZE(ab8505_fg_sysfs_psy_attrs); i++) | |
297d716f | 2944 | (void)device_remove_file(&di->fg_psy->dev, |
c75cfa9e | 2945 | &ab8505_fg_sysfs_psy_attrs[i]); |
93ff722e LJ |
2946 | } |
2947 | } | |
2948 | ||
13151631 AM |
2949 | /* Exposure to the sysfs interface <<END>> */ |
2950 | ||
2951 | #if defined(CONFIG_PM) | |
2952 | static int ab8500_fg_resume(struct platform_device *pdev) | |
2953 | { | |
2954 | struct ab8500_fg *di = platform_get_drvdata(pdev); | |
2955 | ||
2956 | /* | |
2957 | * Change state if we're not charging. If we're charging we will wake | |
2958 | * up on the FG IRQ | |
2959 | */ | |
2960 | if (!di->flags.charging) { | |
2961 | ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_WAKEUP); | |
2962 | queue_work(di->fg_wq, &di->fg_work); | |
2963 | } | |
2964 | ||
2965 | return 0; | |
2966 | } | |
2967 | ||
2968 | static int ab8500_fg_suspend(struct platform_device *pdev, | |
2969 | pm_message_t state) | |
2970 | { | |
2971 | struct ab8500_fg *di = platform_get_drvdata(pdev); | |
2972 | ||
2973 | flush_delayed_work(&di->fg_periodic_work); | |
53ef1f59 JA |
2974 | flush_work(&di->fg_work); |
2975 | flush_work(&di->fg_acc_cur_work); | |
2976 | flush_delayed_work(&di->fg_reinit_work); | |
2977 | flush_delayed_work(&di->fg_low_bat_work); | |
2978 | flush_delayed_work(&di->fg_check_hw_failure_work); | |
13151631 AM |
2979 | |
2980 | /* | |
2981 | * If the FG is enabled we will disable it before going to suspend | |
2982 | * only if we're not charging | |
2983 | */ | |
2984 | if (di->flags.fg_enabled && !di->flags.charging) | |
2985 | ab8500_fg_coulomb_counter(di, false); | |
2986 | ||
2987 | return 0; | |
2988 | } | |
2989 | #else | |
2990 | #define ab8500_fg_suspend NULL | |
2991 | #define ab8500_fg_resume NULL | |
2992 | #endif | |
2993 | ||
415ec69f | 2994 | static int ab8500_fg_remove(struct platform_device *pdev) |
13151631 AM |
2995 | { |
2996 | int ret = 0; | |
2997 | struct ab8500_fg *di = platform_get_drvdata(pdev); | |
2998 | ||
2999 | list_del(&di->node); | |
3000 | ||
3001 | /* Disable coulomb counter */ | |
3002 | ret = ab8500_fg_coulomb_counter(di, false); | |
3003 | if (ret) | |
3004 | dev_err(di->dev, "failed to disable coulomb counter\n"); | |
3005 | ||
3006 | destroy_workqueue(di->fg_wq); | |
3007 | ab8500_fg_sysfs_exit(di); | |
3008 | ||
3009 | flush_scheduled_work(); | |
c75cfa9e | 3010 | ab8500_fg_sysfs_psy_remove_attrs(di); |
297d716f | 3011 | power_supply_unregister(di->fg_psy); |
13151631 AM |
3012 | return ret; |
3013 | } | |
3014 | ||
3015 | /* ab8500 fg driver interrupts and their respective isr */ | |
02232be7 | 3016 | static struct ab8500_fg_interrupts ab8500_fg_irq_th[] = { |
13151631 AM |
3017 | {"NCONV_ACCU", ab8500_fg_cc_convend_handler}, |
3018 | {"BATT_OVV", ab8500_fg_batt_ovv_handler}, | |
3019 | {"LOW_BAT_F", ab8500_fg_lowbatf_handler}, | |
3020 | {"CC_INT_CALIB", ab8500_fg_cc_int_calib_handler}, | |
02232be7 VR |
3021 | }; |
3022 | ||
3023 | static struct ab8500_fg_interrupts ab8500_fg_irq_bh[] = { | |
13151631 AM |
3024 | {"CCEOC", ab8500_fg_cc_data_end_handler}, |
3025 | }; | |
3026 | ||
e0f1abeb R |
3027 | static char *supply_interface[] = { |
3028 | "ab8500_chargalg", | |
3029 | "ab8500_usb", | |
3030 | }; | |
3031 | ||
297d716f KK |
3032 | static const struct power_supply_desc ab8500_fg_desc = { |
3033 | .name = "ab8500_fg", | |
3034 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
3035 | .properties = ab8500_fg_props, | |
3036 | .num_properties = ARRAY_SIZE(ab8500_fg_props), | |
3037 | .get_property = ab8500_fg_get_property, | |
3038 | .external_power_changed = ab8500_fg_external_power_changed, | |
3039 | }; | |
3040 | ||
c8afa640 | 3041 | static int ab8500_fg_probe(struct platform_device *pdev) |
13151631 | 3042 | { |
e0f1abeb | 3043 | struct device_node *np = pdev->dev.of_node; |
195c1c66 | 3044 | struct abx500_bm_data *plat = pdev->dev.platform_data; |
2dc9215d | 3045 | struct power_supply_config psy_cfg = {}; |
e0f1abeb | 3046 | struct ab8500_fg *di; |
13151631 AM |
3047 | int i, irq; |
3048 | int ret = 0; | |
13151631 | 3049 | |
e0f1abeb R |
3050 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
3051 | if (!di) { | |
3052 | dev_err(&pdev->dev, "%s no mem for ab8500_fg\n", __func__); | |
13151631 | 3053 | return -ENOMEM; |
e0f1abeb | 3054 | } |
195c1c66 LJ |
3055 | |
3056 | if (!plat) { | |
3057 | dev_err(&pdev->dev, "no battery management data supplied\n"); | |
3058 | return -EINVAL; | |
3059 | } | |
3060 | di->bm = plat; | |
3061 | ||
3062 | if (np) { | |
3063 | ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm); | |
3064 | if (ret) { | |
3065 | dev_err(&pdev->dev, "failed to get battery information\n"); | |
3066 | return ret; | |
e0f1abeb | 3067 | } |
e0f1abeb | 3068 | } |
13151631 AM |
3069 | |
3070 | mutex_init(&di->cc_lock); | |
3071 | ||
3072 | /* get parent data */ | |
3073 | di->dev = &pdev->dev; | |
3074 | di->parent = dev_get_drvdata(pdev->dev.parent); | |
3075 | di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0"); | |
3076 | ||
2dc9215d KK |
3077 | psy_cfg.supplied_to = supply_interface; |
3078 | psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); | |
297d716f | 3079 | psy_cfg.drv_data = di; |
2dc9215d | 3080 | |
13151631 | 3081 | di->bat_cap.max_mah_design = MILLI_TO_MICRO * |
b0284de0 | 3082 | di->bm->bat_type[di->bm->batt_id].charge_full_design; |
13151631 AM |
3083 | |
3084 | di->bat_cap.max_mah = di->bat_cap.max_mah_design; | |
3085 | ||
b0284de0 | 3086 | di->vbat_nom = di->bm->bat_type[di->bm->batt_id].nominal_voltage; |
13151631 AM |
3087 | |
3088 | di->init_capacity = true; | |
3089 | ||
3090 | ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT); | |
3091 | ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_INIT); | |
3092 | ||
3093 | /* Create a work queue for running the FG algorithm */ | |
1c53f370 | 3094 | di->fg_wq = alloc_ordered_workqueue("ab8500_fg_wq", WQ_MEM_RECLAIM); |
13151631 AM |
3095 | if (di->fg_wq == NULL) { |
3096 | dev_err(di->dev, "failed to create work queue\n"); | |
e0f1abeb | 3097 | return -ENOMEM; |
13151631 AM |
3098 | } |
3099 | ||
3100 | /* Init work for running the fg algorithm instantly */ | |
3101 | INIT_WORK(&di->fg_work, ab8500_fg_instant_work); | |
3102 | ||
3103 | /* Init work for getting the battery accumulated current */ | |
3104 | INIT_WORK(&di->fg_acc_cur_work, ab8500_fg_acc_cur_work); | |
3105 | ||
3106 | /* Init work for reinitialising the fg algorithm */ | |
203b42f7 | 3107 | INIT_DEFERRABLE_WORK(&di->fg_reinit_work, |
13151631 AM |
3108 | ab8500_fg_reinit_work); |
3109 | ||
3110 | /* Work delayed Queue to run the state machine */ | |
203b42f7 | 3111 | INIT_DEFERRABLE_WORK(&di->fg_periodic_work, |
13151631 AM |
3112 | ab8500_fg_periodic_work); |
3113 | ||
3114 | /* Work to check low battery condition */ | |
203b42f7 | 3115 | INIT_DEFERRABLE_WORK(&di->fg_low_bat_work, |
13151631 AM |
3116 | ab8500_fg_low_bat_work); |
3117 | ||
3118 | /* Init work for HW failure check */ | |
203b42f7 | 3119 | INIT_DEFERRABLE_WORK(&di->fg_check_hw_failure_work, |
13151631 AM |
3120 | ab8500_fg_check_hw_failure_work); |
3121 | ||
75f2a219 HB |
3122 | /* Reset battery low voltage flag */ |
3123 | di->flags.low_bat = false; | |
3124 | ||
3125 | /* Initialize low battery counter */ | |
3126 | di->low_bat_cnt = 10; | |
3127 | ||
13151631 AM |
3128 | /* Initialize OVV, and other registers */ |
3129 | ret = ab8500_fg_init_hw_registers(di); | |
3130 | if (ret) { | |
3131 | dev_err(di->dev, "failed to initialize registers\n"); | |
3132 | goto free_inst_curr_wq; | |
3133 | } | |
3134 | ||
3135 | /* Consider battery unknown until we're informed otherwise */ | |
3136 | di->flags.batt_unknown = true; | |
3137 | di->flags.batt_id_received = false; | |
3138 | ||
3139 | /* Register FG power supply class */ | |
297d716f KK |
3140 | di->fg_psy = power_supply_register(di->dev, &ab8500_fg_desc, &psy_cfg); |
3141 | if (IS_ERR(di->fg_psy)) { | |
13151631 | 3142 | dev_err(di->dev, "failed to register FG psy\n"); |
297d716f | 3143 | ret = PTR_ERR(di->fg_psy); |
13151631 AM |
3144 | goto free_inst_curr_wq; |
3145 | } | |
3146 | ||
b0284de0 | 3147 | di->fg_samples = SEC_TO_SAMPLE(di->bm->fg_params->init_timer); |
13151631 AM |
3148 | ab8500_fg_coulomb_counter(di, true); |
3149 | ||
3988a4df JB |
3150 | /* |
3151 | * Initialize completion used to notify completion and start | |
3152 | * of inst current | |
3153 | */ | |
3154 | init_completion(&di->ab8500_fg_started); | |
13151631 AM |
3155 | init_completion(&di->ab8500_fg_complete); |
3156 | ||
02232be7 VR |
3157 | /* Register primary interrupt handlers */ |
3158 | for (i = 0; i < ARRAY_SIZE(ab8500_fg_irq_th); i++) { | |
3159 | irq = platform_get_irq_byname(pdev, ab8500_fg_irq_th[i].name); | |
3160 | ret = request_irq(irq, ab8500_fg_irq_th[i].isr, | |
3161 | IRQF_SHARED | IRQF_NO_SUSPEND, | |
3162 | ab8500_fg_irq_th[i].name, di); | |
13151631 AM |
3163 | |
3164 | if (ret != 0) { | |
02232be7 VR |
3165 | dev_err(di->dev, "failed to request %s IRQ %d: %d\n", |
3166 | ab8500_fg_irq_th[i].name, irq, ret); | |
13151631 AM |
3167 | goto free_irq; |
3168 | } | |
3169 | dev_dbg(di->dev, "Requested %s IRQ %d: %d\n", | |
02232be7 | 3170 | ab8500_fg_irq_th[i].name, irq, ret); |
13151631 | 3171 | } |
02232be7 VR |
3172 | |
3173 | /* Register threaded interrupt handler */ | |
3174 | irq = platform_get_irq_byname(pdev, ab8500_fg_irq_bh[0].name); | |
3175 | ret = request_threaded_irq(irq, NULL, ab8500_fg_irq_bh[0].isr, | |
3176 | IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT, | |
3177 | ab8500_fg_irq_bh[0].name, di); | |
3178 | ||
3179 | if (ret != 0) { | |
3180 | dev_err(di->dev, "failed to request %s IRQ %d: %d\n", | |
3181 | ab8500_fg_irq_bh[0].name, irq, ret); | |
3182 | goto free_irq; | |
3183 | } | |
3184 | dev_dbg(di->dev, "Requested %s IRQ %d: %d\n", | |
3185 | ab8500_fg_irq_bh[0].name, irq, ret); | |
3186 | ||
13151631 AM |
3187 | di->irq = platform_get_irq_byname(pdev, "CCEOC"); |
3188 | disable_irq(di->irq); | |
3988a4df | 3189 | di->nbr_cceoc_irq_cnt = 0; |
13151631 AM |
3190 | |
3191 | platform_set_drvdata(pdev, di); | |
3192 | ||
3193 | ret = ab8500_fg_sysfs_init(di); | |
3194 | if (ret) { | |
3195 | dev_err(di->dev, "failed to create sysfs entry\n"); | |
3196 | goto free_irq; | |
3197 | } | |
3198 | ||
c75cfa9e | 3199 | ret = ab8500_fg_sysfs_psy_create_attrs(di); |
93ff722e LJ |
3200 | if (ret) { |
3201 | dev_err(di->dev, "failed to create FG psy\n"); | |
3202 | ab8500_fg_sysfs_exit(di); | |
3203 | goto free_irq; | |
3204 | } | |
3205 | ||
13151631 AM |
3206 | /* Calibrate the fg first time */ |
3207 | di->flags.calibrate = true; | |
3208 | di->calib_state = AB8500_FG_CALIB_INIT; | |
3209 | ||
3210 | /* Use room temp as default value until we get an update from driver. */ | |
3211 | di->bat_temp = 210; | |
3212 | ||
3213 | /* Run the FG algorithm */ | |
3214 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
3215 | ||
3216 | list_add_tail(&di->node, &ab8500_fg_list); | |
3217 | ||
3218 | return ret; | |
3219 | ||
3220 | free_irq: | |
297d716f | 3221 | power_supply_unregister(di->fg_psy); |
13151631 | 3222 | |
02232be7 VR |
3223 | /* We also have to free all registered irqs */ |
3224 | for (i = 0; i < ARRAY_SIZE(ab8500_fg_irq_th); i++) { | |
3225 | irq = platform_get_irq_byname(pdev, ab8500_fg_irq_th[i].name); | |
13151631 AM |
3226 | free_irq(irq, di); |
3227 | } | |
02232be7 VR |
3228 | irq = platform_get_irq_byname(pdev, ab8500_fg_irq_bh[0].name); |
3229 | free_irq(irq, di); | |
13151631 AM |
3230 | free_inst_curr_wq: |
3231 | destroy_workqueue(di->fg_wq); | |
13151631 AM |
3232 | return ret; |
3233 | } | |
3234 | ||
e0f1abeb R |
3235 | static const struct of_device_id ab8500_fg_match[] = { |
3236 | { .compatible = "stericsson,ab8500-fg", }, | |
3237 | { }, | |
3238 | }; | |
3239 | ||
13151631 AM |
3240 | static struct platform_driver ab8500_fg_driver = { |
3241 | .probe = ab8500_fg_probe, | |
28ea73f4 | 3242 | .remove = ab8500_fg_remove, |
13151631 AM |
3243 | .suspend = ab8500_fg_suspend, |
3244 | .resume = ab8500_fg_resume, | |
3245 | .driver = { | |
3246 | .name = "ab8500-fg", | |
e0f1abeb | 3247 | .of_match_table = ab8500_fg_match, |
13151631 AM |
3248 | }, |
3249 | }; | |
3250 | ||
3251 | static int __init ab8500_fg_init(void) | |
3252 | { | |
3253 | return platform_driver_register(&ab8500_fg_driver); | |
3254 | } | |
3255 | ||
3256 | static void __exit ab8500_fg_exit(void) | |
3257 | { | |
3258 | platform_driver_unregister(&ab8500_fg_driver); | |
3259 | } | |
3260 | ||
3261 | subsys_initcall_sync(ab8500_fg_init); | |
3262 | module_exit(ab8500_fg_exit); | |
3263 | ||
3264 | MODULE_LICENSE("GPL v2"); | |
3265 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski"); | |
3266 | MODULE_ALIAS("platform:ab8500-fg"); | |
3267 | MODULE_DESCRIPTION("AB8500 Fuel Gauge driver"); |