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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> |
e0f1abeb | 28 | #include <linux/of.h> |
13151631 | 29 | #include <linux/completion.h> |
e0f1abeb R |
30 | #include <linux/mfd/core.h> |
31 | #include <linux/mfd/abx500.h> | |
32 | #include <linux/mfd/abx500/ab8500.h> | |
33 | #include <linux/mfd/abx500/ab8500-bm.h> | |
34 | #include <linux/mfd/abx500/ab8500-gpadc.h> | |
6eaf8740 | 35 | #include <linux/kernel.h> |
13151631 AM |
36 | |
37 | #define MILLI_TO_MICRO 1000 | |
38 | #define FG_LSB_IN_MA 1627 | |
0577610e | 39 | #define QLSB_NANO_AMP_HOURS_X10 1071 |
13151631 AM |
40 | #define INS_CURR_TIMEOUT (3 * HZ) |
41 | ||
42 | #define SEC_TO_SAMPLE(S) (S * 4) | |
43 | ||
44 | #define NBR_AVG_SAMPLES 20 | |
45 | ||
75f2a219 | 46 | #define LOW_BAT_CHECK_INTERVAL (HZ / 16) /* 62.5 ms */ |
13151631 AM |
47 | |
48 | #define VALID_CAPACITY_SEC (45 * 60) /* 45 minutes */ | |
49 | #define BATT_OK_MIN 2360 /* mV */ | |
50 | #define BATT_OK_INCREMENT 50 /* mV */ | |
51 | #define BATT_OK_MAX_NR_INCREMENTS 0xE | |
52 | ||
53 | /* FG constants */ | |
54 | #define BATT_OVV 0x01 | |
55 | ||
56 | #define interpolate(x, x1, y1, x2, y2) \ | |
57 | ((y1) + ((((y2) - (y1)) * ((x) - (x1))) / ((x2) - (x1)))); | |
58 | ||
59 | #define to_ab8500_fg_device_info(x) container_of((x), \ | |
60 | struct ab8500_fg, fg_psy); | |
61 | ||
62 | /** | |
63 | * struct ab8500_fg_interrupts - ab8500 fg interupts | |
64 | * @name: name of the interrupt | |
65 | * @isr function pointer to the isr | |
66 | */ | |
67 | struct ab8500_fg_interrupts { | |
68 | char *name; | |
69 | irqreturn_t (*isr)(int irq, void *data); | |
70 | }; | |
71 | ||
72 | enum ab8500_fg_discharge_state { | |
73 | AB8500_FG_DISCHARGE_INIT, | |
74 | AB8500_FG_DISCHARGE_INITMEASURING, | |
75 | AB8500_FG_DISCHARGE_INIT_RECOVERY, | |
76 | AB8500_FG_DISCHARGE_RECOVERY, | |
77 | AB8500_FG_DISCHARGE_READOUT_INIT, | |
78 | AB8500_FG_DISCHARGE_READOUT, | |
79 | AB8500_FG_DISCHARGE_WAKEUP, | |
80 | }; | |
81 | ||
82 | static char *discharge_state[] = { | |
83 | "DISCHARGE_INIT", | |
84 | "DISCHARGE_INITMEASURING", | |
85 | "DISCHARGE_INIT_RECOVERY", | |
86 | "DISCHARGE_RECOVERY", | |
87 | "DISCHARGE_READOUT_INIT", | |
88 | "DISCHARGE_READOUT", | |
89 | "DISCHARGE_WAKEUP", | |
90 | }; | |
91 | ||
92 | enum ab8500_fg_charge_state { | |
93 | AB8500_FG_CHARGE_INIT, | |
94 | AB8500_FG_CHARGE_READOUT, | |
95 | }; | |
96 | ||
97 | static char *charge_state[] = { | |
98 | "CHARGE_INIT", | |
99 | "CHARGE_READOUT", | |
100 | }; | |
101 | ||
102 | enum ab8500_fg_calibration_state { | |
103 | AB8500_FG_CALIB_INIT, | |
104 | AB8500_FG_CALIB_WAIT, | |
105 | AB8500_FG_CALIB_END, | |
106 | }; | |
107 | ||
108 | struct ab8500_fg_avg_cap { | |
109 | int avg; | |
110 | int samples[NBR_AVG_SAMPLES]; | |
111 | __kernel_time_t time_stamps[NBR_AVG_SAMPLES]; | |
112 | int pos; | |
113 | int nbr_samples; | |
114 | int sum; | |
115 | }; | |
116 | ||
ea402401 MC |
117 | struct ab8500_fg_cap_scaling { |
118 | bool enable; | |
119 | int cap_to_scale[2]; | |
120 | int disable_cap_level; | |
121 | int scaled_cap; | |
122 | }; | |
123 | ||
13151631 AM |
124 | struct ab8500_fg_battery_capacity { |
125 | int max_mah_design; | |
126 | int max_mah; | |
127 | int mah; | |
128 | int permille; | |
129 | int level; | |
130 | int prev_mah; | |
131 | int prev_percent; | |
132 | int prev_level; | |
133 | int user_mah; | |
ea402401 | 134 | struct ab8500_fg_cap_scaling cap_scale; |
13151631 AM |
135 | }; |
136 | ||
137 | struct ab8500_fg_flags { | |
138 | bool fg_enabled; | |
139 | bool conv_done; | |
140 | bool charging; | |
141 | bool fully_charged; | |
142 | bool force_full; | |
143 | bool low_bat_delay; | |
144 | bool low_bat; | |
145 | bool bat_ovv; | |
146 | bool batt_unknown; | |
147 | bool calibrate; | |
148 | bool user_cap; | |
149 | bool batt_id_received; | |
150 | }; | |
151 | ||
152 | struct inst_curr_result_list { | |
153 | struct list_head list; | |
154 | int *result; | |
155 | }; | |
156 | ||
157 | /** | |
158 | * struct ab8500_fg - ab8500 FG device information | |
159 | * @dev: Pointer to the structure device | |
160 | * @node: a list of AB8500 FGs, hence prepared for reentrance | |
161 | * @irq holds the CCEOC interrupt number | |
162 | * @vbat: Battery voltage in mV | |
163 | * @vbat_nom: Nominal battery voltage in mV | |
164 | * @inst_curr: Instantenous battery current in mA | |
165 | * @avg_curr: Average battery current in mA | |
166 | * @bat_temp battery temperature | |
167 | * @fg_samples: Number of samples used in the FG accumulation | |
168 | * @accu_charge: Accumulated charge from the last conversion | |
169 | * @recovery_cnt: Counter for recovery mode | |
170 | * @high_curr_cnt: Counter for high current mode | |
171 | * @init_cnt: Counter for init mode | |
75f2a219 | 172 | * @low_bat_cnt Counter for number of consecutive low battery measures |
3988a4df | 173 | * @nbr_cceoc_irq_cnt Counter for number of CCEOC irqs received since enabled |
13151631 AM |
174 | * @recovery_needed: Indicate if recovery is needed |
175 | * @high_curr_mode: Indicate if we're in high current mode | |
176 | * @init_capacity: Indicate if initial capacity measuring should be done | |
177 | * @turn_off_fg: True if fg was off before current measurement | |
178 | * @calib_state State during offset calibration | |
179 | * @discharge_state: Current discharge state | |
180 | * @charge_state: Current charge state | |
3988a4df | 181 | * @ab8500_fg_started Completion struct used for the instant current start |
13151631 AM |
182 | * @ab8500_fg_complete Completion struct used for the instant current reading |
183 | * @flags: Structure for information about events triggered | |
184 | * @bat_cap: Structure for battery capacity specific parameters | |
185 | * @avg_cap: Average capacity filter | |
186 | * @parent: Pointer to the struct ab8500 | |
187 | * @gpadc: Pointer to the struct gpadc | |
b0284de0 | 188 | * @bm: Platform specific battery management information |
13151631 AM |
189 | * @fg_psy: Structure that holds the FG specific battery properties |
190 | * @fg_wq: Work queue for running the FG algorithm | |
191 | * @fg_periodic_work: Work to run the FG algorithm periodically | |
192 | * @fg_low_bat_work: Work to check low bat condition | |
193 | * @fg_reinit_work Work used to reset and reinitialise the FG algorithm | |
194 | * @fg_work: Work to run the FG algorithm instantly | |
195 | * @fg_acc_cur_work: Work to read the FG accumulator | |
196 | * @fg_check_hw_failure_work: Work for checking HW state | |
197 | * @cc_lock: Mutex for locking the CC | |
198 | * @fg_kobject: Structure of type kobject | |
199 | */ | |
200 | struct ab8500_fg { | |
201 | struct device *dev; | |
202 | struct list_head node; | |
203 | int irq; | |
204 | int vbat; | |
205 | int vbat_nom; | |
206 | int inst_curr; | |
207 | int avg_curr; | |
208 | int bat_temp; | |
209 | int fg_samples; | |
210 | int accu_charge; | |
211 | int recovery_cnt; | |
212 | int high_curr_cnt; | |
213 | int init_cnt; | |
75f2a219 | 214 | int low_bat_cnt; |
3988a4df | 215 | int nbr_cceoc_irq_cnt; |
13151631 AM |
216 | bool recovery_needed; |
217 | bool high_curr_mode; | |
218 | bool init_capacity; | |
219 | bool turn_off_fg; | |
220 | enum ab8500_fg_calibration_state calib_state; | |
221 | enum ab8500_fg_discharge_state discharge_state; | |
222 | enum ab8500_fg_charge_state charge_state; | |
3988a4df | 223 | struct completion ab8500_fg_started; |
13151631 AM |
224 | struct completion ab8500_fg_complete; |
225 | struct ab8500_fg_flags flags; | |
226 | struct ab8500_fg_battery_capacity bat_cap; | |
227 | struct ab8500_fg_avg_cap avg_cap; | |
228 | struct ab8500 *parent; | |
229 | struct ab8500_gpadc *gpadc; | |
b0284de0 | 230 | struct abx500_bm_data *bm; |
13151631 AM |
231 | struct power_supply fg_psy; |
232 | struct workqueue_struct *fg_wq; | |
233 | struct delayed_work fg_periodic_work; | |
234 | struct delayed_work fg_low_bat_work; | |
235 | struct delayed_work fg_reinit_work; | |
236 | struct work_struct fg_work; | |
237 | struct work_struct fg_acc_cur_work; | |
238 | struct delayed_work fg_check_hw_failure_work; | |
239 | struct mutex cc_lock; | |
240 | struct kobject fg_kobject; | |
241 | }; | |
242 | static LIST_HEAD(ab8500_fg_list); | |
243 | ||
244 | /** | |
245 | * ab8500_fg_get() - returns a reference to the primary AB8500 fuel gauge | |
246 | * (i.e. the first fuel gauge in the instance list) | |
247 | */ | |
248 | struct ab8500_fg *ab8500_fg_get(void) | |
249 | { | |
250 | struct ab8500_fg *fg; | |
251 | ||
252 | if (list_empty(&ab8500_fg_list)) | |
253 | return NULL; | |
254 | ||
255 | fg = list_first_entry(&ab8500_fg_list, struct ab8500_fg, node); | |
256 | return fg; | |
257 | } | |
258 | ||
259 | /* Main battery properties */ | |
260 | static enum power_supply_property ab8500_fg_props[] = { | |
261 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
262 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
263 | POWER_SUPPLY_PROP_CURRENT_AVG, | |
264 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, | |
265 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
266 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
267 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
268 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
269 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
270 | POWER_SUPPLY_PROP_CAPACITY, | |
271 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
272 | }; | |
273 | ||
274 | /* | |
275 | * This array maps the raw hex value to lowbat voltage used by the AB8500 | |
276 | * Values taken from the UM0836 | |
277 | */ | |
278 | static int ab8500_fg_lowbat_voltage_map[] = { | |
279 | 2300 , | |
280 | 2325 , | |
281 | 2350 , | |
282 | 2375 , | |
283 | 2400 , | |
284 | 2425 , | |
285 | 2450 , | |
286 | 2475 , | |
287 | 2500 , | |
288 | 2525 , | |
289 | 2550 , | |
290 | 2575 , | |
291 | 2600 , | |
292 | 2625 , | |
293 | 2650 , | |
294 | 2675 , | |
295 | 2700 , | |
296 | 2725 , | |
297 | 2750 , | |
298 | 2775 , | |
299 | 2800 , | |
300 | 2825 , | |
301 | 2850 , | |
302 | 2875 , | |
303 | 2900 , | |
304 | 2925 , | |
305 | 2950 , | |
306 | 2975 , | |
307 | 3000 , | |
308 | 3025 , | |
309 | 3050 , | |
310 | 3075 , | |
311 | 3100 , | |
312 | 3125 , | |
313 | 3150 , | |
314 | 3175 , | |
315 | 3200 , | |
316 | 3225 , | |
317 | 3250 , | |
318 | 3275 , | |
319 | 3300 , | |
320 | 3325 , | |
321 | 3350 , | |
322 | 3375 , | |
323 | 3400 , | |
324 | 3425 , | |
325 | 3450 , | |
326 | 3475 , | |
327 | 3500 , | |
328 | 3525 , | |
329 | 3550 , | |
330 | 3575 , | |
331 | 3600 , | |
332 | 3625 , | |
333 | 3650 , | |
334 | 3675 , | |
335 | 3700 , | |
336 | 3725 , | |
337 | 3750 , | |
338 | 3775 , | |
339 | 3800 , | |
340 | 3825 , | |
341 | 3850 , | |
342 | 3850 , | |
343 | }; | |
344 | ||
345 | static u8 ab8500_volt_to_regval(int voltage) | |
346 | { | |
347 | int i; | |
348 | ||
349 | if (voltage < ab8500_fg_lowbat_voltage_map[0]) | |
350 | return 0; | |
351 | ||
352 | for (i = 0; i < ARRAY_SIZE(ab8500_fg_lowbat_voltage_map); i++) { | |
353 | if (voltage < ab8500_fg_lowbat_voltage_map[i]) | |
354 | return (u8) i - 1; | |
355 | } | |
356 | ||
357 | /* If not captured above, return index of last element */ | |
358 | return (u8) ARRAY_SIZE(ab8500_fg_lowbat_voltage_map) - 1; | |
359 | } | |
360 | ||
361 | /** | |
362 | * ab8500_fg_is_low_curr() - Low or high current mode | |
363 | * @di: pointer to the ab8500_fg structure | |
364 | * @curr: the current to base or our decision on | |
365 | * | |
366 | * Low current mode if the current consumption is below a certain threshold | |
367 | */ | |
368 | static int ab8500_fg_is_low_curr(struct ab8500_fg *di, int curr) | |
369 | { | |
370 | /* | |
371 | * We want to know if we're in low current mode | |
372 | */ | |
b0284de0 | 373 | if (curr > -di->bm->fg_params->high_curr_threshold) |
13151631 AM |
374 | return true; |
375 | else | |
376 | return false; | |
377 | } | |
378 | ||
379 | /** | |
380 | * ab8500_fg_add_cap_sample() - Add capacity to average filter | |
381 | * @di: pointer to the ab8500_fg structure | |
382 | * @sample: the capacity in mAh to add to the filter | |
383 | * | |
384 | * A capacity is added to the filter and a new mean capacity is calculated and | |
385 | * returned | |
386 | */ | |
387 | static int ab8500_fg_add_cap_sample(struct ab8500_fg *di, int sample) | |
388 | { | |
389 | struct timespec ts; | |
390 | struct ab8500_fg_avg_cap *avg = &di->avg_cap; | |
391 | ||
392 | getnstimeofday(&ts); | |
393 | ||
394 | do { | |
395 | avg->sum += sample - avg->samples[avg->pos]; | |
396 | avg->samples[avg->pos] = sample; | |
397 | avg->time_stamps[avg->pos] = ts.tv_sec; | |
398 | avg->pos++; | |
399 | ||
400 | if (avg->pos == NBR_AVG_SAMPLES) | |
401 | avg->pos = 0; | |
402 | ||
403 | if (avg->nbr_samples < NBR_AVG_SAMPLES) | |
404 | avg->nbr_samples++; | |
405 | ||
406 | /* | |
407 | * Check the time stamp for each sample. If too old, | |
408 | * replace with latest sample | |
409 | */ | |
410 | } while (ts.tv_sec - VALID_CAPACITY_SEC > avg->time_stamps[avg->pos]); | |
411 | ||
412 | avg->avg = avg->sum / avg->nbr_samples; | |
413 | ||
414 | return avg->avg; | |
415 | } | |
416 | ||
417 | /** | |
418 | * ab8500_fg_clear_cap_samples() - Clear average filter | |
419 | * @di: pointer to the ab8500_fg structure | |
420 | * | |
421 | * The capacity filter is is reset to zero. | |
422 | */ | |
423 | static void ab8500_fg_clear_cap_samples(struct ab8500_fg *di) | |
424 | { | |
425 | int i; | |
426 | struct ab8500_fg_avg_cap *avg = &di->avg_cap; | |
427 | ||
428 | avg->pos = 0; | |
429 | avg->nbr_samples = 0; | |
430 | avg->sum = 0; | |
431 | avg->avg = 0; | |
432 | ||
433 | for (i = 0; i < NBR_AVG_SAMPLES; i++) { | |
434 | avg->samples[i] = 0; | |
435 | avg->time_stamps[i] = 0; | |
436 | } | |
437 | } | |
438 | ||
439 | /** | |
440 | * ab8500_fg_fill_cap_sample() - Fill average filter | |
441 | * @di: pointer to the ab8500_fg structure | |
442 | * @sample: the capacity in mAh to fill the filter with | |
443 | * | |
444 | * The capacity filter is filled with a capacity in mAh | |
445 | */ | |
446 | static void ab8500_fg_fill_cap_sample(struct ab8500_fg *di, int sample) | |
447 | { | |
448 | int i; | |
449 | struct timespec ts; | |
450 | struct ab8500_fg_avg_cap *avg = &di->avg_cap; | |
451 | ||
452 | getnstimeofday(&ts); | |
453 | ||
454 | for (i = 0; i < NBR_AVG_SAMPLES; i++) { | |
455 | avg->samples[i] = sample; | |
456 | avg->time_stamps[i] = ts.tv_sec; | |
457 | } | |
458 | ||
459 | avg->pos = 0; | |
460 | avg->nbr_samples = NBR_AVG_SAMPLES; | |
461 | avg->sum = sample * NBR_AVG_SAMPLES; | |
462 | avg->avg = sample; | |
463 | } | |
464 | ||
465 | /** | |
466 | * ab8500_fg_coulomb_counter() - enable coulomb counter | |
467 | * @di: pointer to the ab8500_fg structure | |
468 | * @enable: enable/disable | |
469 | * | |
470 | * Enable/Disable coulomb counter. | |
471 | * On failure returns negative value. | |
472 | */ | |
473 | static int ab8500_fg_coulomb_counter(struct ab8500_fg *di, bool enable) | |
474 | { | |
475 | int ret = 0; | |
476 | mutex_lock(&di->cc_lock); | |
477 | if (enable) { | |
478 | /* To be able to reprogram the number of samples, we have to | |
479 | * first stop the CC and then enable it again */ | |
480 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
481 | AB8500_RTC_CC_CONF_REG, 0x00); | |
482 | if (ret) | |
483 | goto cc_err; | |
484 | ||
485 | /* Program the samples */ | |
486 | ret = abx500_set_register_interruptible(di->dev, | |
487 | AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU, | |
488 | di->fg_samples); | |
489 | if (ret) | |
490 | goto cc_err; | |
491 | ||
492 | /* Start the CC */ | |
493 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
494 | AB8500_RTC_CC_CONF_REG, | |
495 | (CC_DEEP_SLEEP_ENA | CC_PWR_UP_ENA)); | |
496 | if (ret) | |
497 | goto cc_err; | |
498 | ||
499 | di->flags.fg_enabled = true; | |
500 | } else { | |
501 | /* Clear any pending read requests */ | |
e32ad07c KK |
502 | ret = abx500_mask_and_set_register_interruptible(di->dev, |
503 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
504 | (RESET_ACCU | READ_REQ), 0); | |
13151631 AM |
505 | if (ret) |
506 | goto cc_err; | |
507 | ||
508 | ret = abx500_set_register_interruptible(di->dev, | |
509 | AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU_CTRL, 0); | |
510 | if (ret) | |
511 | goto cc_err; | |
512 | ||
513 | /* Stop the CC */ | |
514 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
515 | AB8500_RTC_CC_CONF_REG, 0); | |
516 | if (ret) | |
517 | goto cc_err; | |
518 | ||
519 | di->flags.fg_enabled = false; | |
520 | ||
521 | } | |
522 | dev_dbg(di->dev, " CC enabled: %d Samples: %d\n", | |
523 | enable, di->fg_samples); | |
524 | ||
525 | mutex_unlock(&di->cc_lock); | |
526 | ||
527 | return ret; | |
528 | cc_err: | |
529 | dev_err(di->dev, "%s Enabling coulomb counter failed\n", __func__); | |
530 | mutex_unlock(&di->cc_lock); | |
531 | return ret; | |
532 | } | |
533 | ||
534 | /** | |
535 | * ab8500_fg_inst_curr_start() - start battery instantaneous current | |
536 | * @di: pointer to the ab8500_fg structure | |
537 | * | |
538 | * Returns 0 or error code | |
539 | * Note: This is part "one" and has to be called before | |
540 | * ab8500_fg_inst_curr_finalize() | |
541 | */ | |
3988a4df | 542 | int ab8500_fg_inst_curr_start(struct ab8500_fg *di) |
13151631 AM |
543 | { |
544 | u8 reg_val; | |
545 | int ret; | |
546 | ||
547 | mutex_lock(&di->cc_lock); | |
548 | ||
3988a4df | 549 | di->nbr_cceoc_irq_cnt = 0; |
13151631 AM |
550 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, |
551 | AB8500_RTC_CC_CONF_REG, ®_val); | |
552 | if (ret < 0) | |
553 | goto fail; | |
554 | ||
555 | if (!(reg_val & CC_PWR_UP_ENA)) { | |
556 | dev_dbg(di->dev, "%s Enable FG\n", __func__); | |
557 | di->turn_off_fg = true; | |
558 | ||
559 | /* Program the samples */ | |
560 | ret = abx500_set_register_interruptible(di->dev, | |
561 | AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU, | |
562 | SEC_TO_SAMPLE(10)); | |
563 | if (ret) | |
564 | goto fail; | |
565 | ||
566 | /* Start the CC */ | |
567 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
568 | AB8500_RTC_CC_CONF_REG, | |
569 | (CC_DEEP_SLEEP_ENA | CC_PWR_UP_ENA)); | |
570 | if (ret) | |
571 | goto fail; | |
572 | } else { | |
573 | di->turn_off_fg = false; | |
574 | } | |
575 | ||
576 | /* Return and WFI */ | |
16735d02 WS |
577 | reinit_completion(&di->ab8500_fg_started); |
578 | reinit_completion(&di->ab8500_fg_complete); | |
13151631 AM |
579 | enable_irq(di->irq); |
580 | ||
581 | /* Note: cc_lock is still locked */ | |
582 | return 0; | |
583 | fail: | |
584 | mutex_unlock(&di->cc_lock); | |
585 | return ret; | |
586 | } | |
587 | ||
3988a4df JB |
588 | /** |
589 | * ab8500_fg_inst_curr_started() - check if fg conversion has started | |
590 | * @di: pointer to the ab8500_fg structure | |
591 | * | |
592 | * Returns 1 if conversion started, 0 if still waiting | |
593 | */ | |
594 | int ab8500_fg_inst_curr_started(struct ab8500_fg *di) | |
595 | { | |
596 | return completion_done(&di->ab8500_fg_started); | |
597 | } | |
598 | ||
13151631 AM |
599 | /** |
600 | * ab8500_fg_inst_curr_done() - check if fg conversion is done | |
601 | * @di: pointer to the ab8500_fg structure | |
602 | * | |
603 | * Returns 1 if conversion done, 0 if still waiting | |
604 | */ | |
605 | int ab8500_fg_inst_curr_done(struct ab8500_fg *di) | |
606 | { | |
607 | return completion_done(&di->ab8500_fg_complete); | |
608 | } | |
609 | ||
610 | /** | |
611 | * ab8500_fg_inst_curr_finalize() - battery instantaneous current | |
612 | * @di: pointer to the ab8500_fg structure | |
613 | * @res: battery instantenous current(on success) | |
614 | * | |
615 | * Returns 0 or an error code | |
616 | * Note: This is part "two" and has to be called at earliest 250 ms | |
617 | * after ab8500_fg_inst_curr_start() | |
618 | */ | |
619 | int ab8500_fg_inst_curr_finalize(struct ab8500_fg *di, int *res) | |
620 | { | |
621 | u8 low, high; | |
622 | int val; | |
623 | int ret; | |
624 | int timeout; | |
625 | ||
626 | if (!completion_done(&di->ab8500_fg_complete)) { | |
3988a4df JB |
627 | timeout = wait_for_completion_timeout( |
628 | &di->ab8500_fg_complete, | |
13151631 AM |
629 | INS_CURR_TIMEOUT); |
630 | dev_dbg(di->dev, "Finalize time: %d ms\n", | |
631 | ((INS_CURR_TIMEOUT - timeout) * 1000) / HZ); | |
632 | if (!timeout) { | |
633 | ret = -ETIME; | |
634 | disable_irq(di->irq); | |
3988a4df | 635 | di->nbr_cceoc_irq_cnt = 0; |
13151631 AM |
636 | dev_err(di->dev, "completion timed out [%d]\n", |
637 | __LINE__); | |
638 | goto fail; | |
639 | } | |
640 | } | |
641 | ||
642 | disable_irq(di->irq); | |
3988a4df | 643 | di->nbr_cceoc_irq_cnt = 0; |
13151631 AM |
644 | |
645 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
646 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
647 | READ_REQ, READ_REQ); | |
648 | ||
649 | /* 100uS between read request and read is needed */ | |
650 | usleep_range(100, 100); | |
651 | ||
652 | /* Read CC Sample conversion value Low and high */ | |
653 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
654 | AB8500_GASG_CC_SMPL_CNVL_REG, &low); | |
655 | if (ret < 0) | |
656 | goto fail; | |
657 | ||
658 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
659 | AB8500_GASG_CC_SMPL_CNVH_REG, &high); | |
660 | if (ret < 0) | |
661 | goto fail; | |
662 | ||
663 | /* | |
664 | * negative value for Discharging | |
665 | * convert 2's compliment into decimal | |
666 | */ | |
667 | if (high & 0x10) | |
668 | val = (low | (high << 8) | 0xFFFFE000); | |
669 | else | |
670 | val = (low | (high << 8)); | |
671 | ||
672 | /* | |
673 | * Convert to unit value in mA | |
674 | * Full scale input voltage is | |
0577610e | 675 | * 63.160mV => LSB = 63.160mV/(4096*res) = 1.542mA |
13151631 | 676 | * Given a 250ms conversion cycle time the LSB corresponds |
0577610e | 677 | * to 107.1 nAh. Convert to current by dividing by the conversion |
13151631 | 678 | * time in hours (250ms = 1 / (3600 * 4)h) |
0577610e | 679 | * 107.1nAh assumes 10mOhm, but fg_res is in 0.1mOhm |
13151631 AM |
680 | */ |
681 | val = (val * QLSB_NANO_AMP_HOURS_X10 * 36 * 4) / | |
b0284de0 | 682 | (1000 * di->bm->fg_res); |
13151631 AM |
683 | |
684 | if (di->turn_off_fg) { | |
685 | dev_dbg(di->dev, "%s Disable FG\n", __func__); | |
686 | ||
687 | /* Clear any pending read requests */ | |
688 | ret = abx500_set_register_interruptible(di->dev, | |
689 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, 0); | |
690 | if (ret) | |
691 | goto fail; | |
692 | ||
693 | /* Stop the CC */ | |
694 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
695 | AB8500_RTC_CC_CONF_REG, 0); | |
696 | if (ret) | |
697 | goto fail; | |
698 | } | |
699 | mutex_unlock(&di->cc_lock); | |
700 | (*res) = val; | |
701 | ||
702 | return 0; | |
703 | fail: | |
704 | mutex_unlock(&di->cc_lock); | |
705 | return ret; | |
706 | } | |
707 | ||
708 | /** | |
709 | * ab8500_fg_inst_curr_blocking() - battery instantaneous current | |
710 | * @di: pointer to the ab8500_fg structure | |
711 | * @res: battery instantenous current(on success) | |
712 | * | |
713 | * Returns 0 else error code | |
714 | */ | |
715 | int ab8500_fg_inst_curr_blocking(struct ab8500_fg *di) | |
716 | { | |
717 | int ret; | |
3988a4df | 718 | int timeout; |
13151631 AM |
719 | int res = 0; |
720 | ||
721 | ret = ab8500_fg_inst_curr_start(di); | |
722 | if (ret) { | |
723 | dev_err(di->dev, "Failed to initialize fg_inst\n"); | |
724 | return 0; | |
725 | } | |
726 | ||
3988a4df JB |
727 | /* Wait for CC to actually start */ |
728 | if (!completion_done(&di->ab8500_fg_started)) { | |
729 | timeout = wait_for_completion_timeout( | |
730 | &di->ab8500_fg_started, | |
731 | INS_CURR_TIMEOUT); | |
732 | dev_dbg(di->dev, "Start time: %d ms\n", | |
733 | ((INS_CURR_TIMEOUT - timeout) * 1000) / HZ); | |
734 | if (!timeout) { | |
735 | ret = -ETIME; | |
736 | dev_err(di->dev, "completion timed out [%d]\n", | |
737 | __LINE__); | |
738 | goto fail; | |
739 | } | |
740 | } | |
741 | ||
13151631 AM |
742 | ret = ab8500_fg_inst_curr_finalize(di, &res); |
743 | if (ret) { | |
744 | dev_err(di->dev, "Failed to finalize fg_inst\n"); | |
745 | return 0; | |
746 | } | |
747 | ||
3988a4df | 748 | dev_dbg(di->dev, "%s instant current: %d", __func__, res); |
13151631 | 749 | return res; |
3988a4df | 750 | fail: |
129d583b | 751 | disable_irq(di->irq); |
3988a4df JB |
752 | mutex_unlock(&di->cc_lock); |
753 | return ret; | |
13151631 AM |
754 | } |
755 | ||
756 | /** | |
757 | * ab8500_fg_acc_cur_work() - average battery current | |
758 | * @work: pointer to the work_struct structure | |
759 | * | |
760 | * Updated the average battery current obtained from the | |
761 | * coulomb counter. | |
762 | */ | |
763 | static void ab8500_fg_acc_cur_work(struct work_struct *work) | |
764 | { | |
765 | int val; | |
766 | int ret; | |
767 | u8 low, med, high; | |
768 | ||
769 | struct ab8500_fg *di = container_of(work, | |
770 | struct ab8500_fg, fg_acc_cur_work); | |
771 | ||
772 | mutex_lock(&di->cc_lock); | |
773 | ret = abx500_set_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
774 | AB8500_GASG_CC_NCOV_ACCU_CTRL, RD_NCONV_ACCU_REQ); | |
775 | if (ret) | |
776 | goto exit; | |
777 | ||
778 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
779 | AB8500_GASG_CC_NCOV_ACCU_LOW, &low); | |
780 | if (ret < 0) | |
781 | goto exit; | |
782 | ||
783 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
784 | AB8500_GASG_CC_NCOV_ACCU_MED, &med); | |
785 | if (ret < 0) | |
786 | goto exit; | |
787 | ||
788 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
789 | AB8500_GASG_CC_NCOV_ACCU_HIGH, &high); | |
790 | if (ret < 0) | |
791 | goto exit; | |
792 | ||
793 | /* Check for sign bit in case of negative value, 2's compliment */ | |
794 | if (high & 0x10) | |
795 | val = (low | (med << 8) | (high << 16) | 0xFFE00000); | |
796 | else | |
797 | val = (low | (med << 8) | (high << 16)); | |
798 | ||
799 | /* | |
800 | * Convert to uAh | |
801 | * Given a 250ms conversion cycle time the LSB corresponds | |
802 | * to 112.9 nAh. | |
803 | * 112.9nAh assumes 10mOhm, but fg_res is in 0.1mOhm | |
804 | */ | |
805 | di->accu_charge = (val * QLSB_NANO_AMP_HOURS_X10) / | |
b0284de0 | 806 | (100 * di->bm->fg_res); |
13151631 AM |
807 | |
808 | /* | |
809 | * Convert to unit value in mA | |
f902dadc | 810 | * by dividing by the conversion |
13151631 | 811 | * time in hours (= samples / (3600 * 4)h) |
f902dadc | 812 | * and multiply with 1000 |
13151631 AM |
813 | */ |
814 | di->avg_curr = (val * QLSB_NANO_AMP_HOURS_X10 * 36) / | |
b0284de0 | 815 | (1000 * di->bm->fg_res * (di->fg_samples / 4)); |
13151631 AM |
816 | |
817 | di->flags.conv_done = true; | |
818 | ||
819 | mutex_unlock(&di->cc_lock); | |
820 | ||
821 | queue_work(di->fg_wq, &di->fg_work); | |
822 | ||
f902dadc POH |
823 | dev_dbg(di->dev, "fg_res: %d, fg_samples: %d, gasg: %d, accu_charge: %d \n", |
824 | di->bm->fg_res, di->fg_samples, val, di->accu_charge); | |
13151631 AM |
825 | return; |
826 | exit: | |
827 | dev_err(di->dev, | |
828 | "Failed to read or write gas gauge registers\n"); | |
829 | mutex_unlock(&di->cc_lock); | |
830 | queue_work(di->fg_wq, &di->fg_work); | |
831 | } | |
832 | ||
833 | /** | |
834 | * ab8500_fg_bat_voltage() - get battery voltage | |
835 | * @di: pointer to the ab8500_fg structure | |
836 | * | |
837 | * Returns battery voltage(on success) else error code | |
838 | */ | |
839 | static int ab8500_fg_bat_voltage(struct ab8500_fg *di) | |
840 | { | |
841 | int vbat; | |
842 | static int prev; | |
843 | ||
844 | vbat = ab8500_gpadc_convert(di->gpadc, MAIN_BAT_V); | |
845 | if (vbat < 0) { | |
846 | dev_err(di->dev, | |
847 | "%s gpadc conversion failed, using previous value\n", | |
848 | __func__); | |
849 | return prev; | |
850 | } | |
851 | ||
852 | prev = vbat; | |
853 | return vbat; | |
854 | } | |
855 | ||
856 | /** | |
857 | * ab8500_fg_volt_to_capacity() - Voltage based capacity | |
858 | * @di: pointer to the ab8500_fg structure | |
859 | * @voltage: The voltage to convert to a capacity | |
860 | * | |
861 | * Returns battery capacity in per mille based on voltage | |
862 | */ | |
863 | static int ab8500_fg_volt_to_capacity(struct ab8500_fg *di, int voltage) | |
864 | { | |
865 | int i, tbl_size; | |
2c899407 | 866 | const struct abx500_v_to_cap *tbl; |
13151631 AM |
867 | int cap = 0; |
868 | ||
b0284de0 LJ |
869 | tbl = di->bm->bat_type[di->bm->batt_id].v_to_cap_tbl, |
870 | tbl_size = di->bm->bat_type[di->bm->batt_id].n_v_cap_tbl_elements; | |
13151631 AM |
871 | |
872 | for (i = 0; i < tbl_size; ++i) { | |
873 | if (voltage > tbl[i].voltage) | |
874 | break; | |
875 | } | |
876 | ||
877 | if ((i > 0) && (i < tbl_size)) { | |
878 | cap = interpolate(voltage, | |
879 | tbl[i].voltage, | |
880 | tbl[i].capacity * 10, | |
881 | tbl[i-1].voltage, | |
882 | tbl[i-1].capacity * 10); | |
883 | } else if (i == 0) { | |
884 | cap = 1000; | |
885 | } else { | |
886 | cap = 0; | |
887 | } | |
888 | ||
889 | dev_dbg(di->dev, "%s Vbat: %d, Cap: %d per mille", | |
890 | __func__, voltage, cap); | |
891 | ||
892 | return cap; | |
893 | } | |
894 | ||
895 | /** | |
896 | * ab8500_fg_uncomp_volt_to_capacity() - Uncompensated voltage based capacity | |
897 | * @di: pointer to the ab8500_fg structure | |
898 | * | |
899 | * Returns battery capacity based on battery voltage that is not compensated | |
900 | * for the voltage drop due to the load | |
901 | */ | |
902 | static int ab8500_fg_uncomp_volt_to_capacity(struct ab8500_fg *di) | |
903 | { | |
904 | di->vbat = ab8500_fg_bat_voltage(di); | |
905 | return ab8500_fg_volt_to_capacity(di, di->vbat); | |
906 | } | |
907 | ||
908 | /** | |
909 | * ab8500_fg_battery_resistance() - Returns the battery inner resistance | |
910 | * @di: pointer to the ab8500_fg structure | |
911 | * | |
912 | * Returns battery inner resistance added with the fuel gauge resistor value | |
913 | * to get the total resistance in the whole link from gnd to bat+ node. | |
914 | */ | |
915 | static int ab8500_fg_battery_resistance(struct ab8500_fg *di) | |
916 | { | |
917 | int i, tbl_size; | |
2c899407 | 918 | const struct batres_vs_temp *tbl; |
13151631 AM |
919 | int resist = 0; |
920 | ||
b0284de0 LJ |
921 | tbl = di->bm->bat_type[di->bm->batt_id].batres_tbl; |
922 | tbl_size = di->bm->bat_type[di->bm->batt_id].n_batres_tbl_elements; | |
13151631 AM |
923 | |
924 | for (i = 0; i < tbl_size; ++i) { | |
925 | if (di->bat_temp / 10 > tbl[i].temp) | |
926 | break; | |
927 | } | |
928 | ||
929 | if ((i > 0) && (i < tbl_size)) { | |
930 | resist = interpolate(di->bat_temp / 10, | |
931 | tbl[i].temp, | |
932 | tbl[i].resist, | |
933 | tbl[i-1].temp, | |
934 | tbl[i-1].resist); | |
935 | } else if (i == 0) { | |
936 | resist = tbl[0].resist; | |
937 | } else { | |
938 | resist = tbl[tbl_size - 1].resist; | |
939 | } | |
940 | ||
941 | dev_dbg(di->dev, "%s Temp: %d battery internal resistance: %d" | |
942 | " fg resistance %d, total: %d (mOhm)\n", | |
b0284de0 LJ |
943 | __func__, di->bat_temp, resist, di->bm->fg_res / 10, |
944 | (di->bm->fg_res / 10) + resist); | |
13151631 AM |
945 | |
946 | /* fg_res variable is in 0.1mOhm */ | |
b0284de0 | 947 | resist += di->bm->fg_res / 10; |
13151631 AM |
948 | |
949 | return resist; | |
950 | } | |
951 | ||
952 | /** | |
953 | * ab8500_fg_load_comp_volt_to_capacity() - Load compensated voltage based capacity | |
954 | * @di: pointer to the ab8500_fg structure | |
955 | * | |
956 | * Returns battery capacity based on battery voltage that is load compensated | |
957 | * for the voltage drop | |
958 | */ | |
959 | static int ab8500_fg_load_comp_volt_to_capacity(struct ab8500_fg *di) | |
960 | { | |
961 | int vbat_comp, res; | |
962 | int i = 0; | |
963 | int vbat = 0; | |
964 | ||
965 | ab8500_fg_inst_curr_start(di); | |
966 | ||
967 | do { | |
968 | vbat += ab8500_fg_bat_voltage(di); | |
969 | i++; | |
9a0bd070 | 970 | usleep_range(5000, 6000); |
13151631 AM |
971 | } while (!ab8500_fg_inst_curr_done(di)); |
972 | ||
973 | ab8500_fg_inst_curr_finalize(di, &di->inst_curr); | |
974 | ||
975 | di->vbat = vbat / i; | |
976 | res = ab8500_fg_battery_resistance(di); | |
977 | ||
978 | /* Use Ohms law to get the load compensated voltage */ | |
979 | vbat_comp = di->vbat - (di->inst_curr * res) / 1000; | |
980 | ||
981 | dev_dbg(di->dev, "%s Measured Vbat: %dmV,Compensated Vbat %dmV, " | |
982 | "R: %dmOhm, Current: %dmA Vbat Samples: %d\n", | |
983 | __func__, di->vbat, vbat_comp, res, di->inst_curr, i); | |
984 | ||
985 | return ab8500_fg_volt_to_capacity(di, vbat_comp); | |
986 | } | |
987 | ||
988 | /** | |
989 | * ab8500_fg_convert_mah_to_permille() - Capacity in mAh to permille | |
990 | * @di: pointer to the ab8500_fg structure | |
991 | * @cap_mah: capacity in mAh | |
992 | * | |
993 | * Converts capacity in mAh to capacity in permille | |
994 | */ | |
995 | static int ab8500_fg_convert_mah_to_permille(struct ab8500_fg *di, int cap_mah) | |
996 | { | |
997 | return (cap_mah * 1000) / di->bat_cap.max_mah_design; | |
998 | } | |
999 | ||
1000 | /** | |
1001 | * ab8500_fg_convert_permille_to_mah() - Capacity in permille to mAh | |
1002 | * @di: pointer to the ab8500_fg structure | |
1003 | * @cap_pm: capacity in permille | |
1004 | * | |
1005 | * Converts capacity in permille to capacity in mAh | |
1006 | */ | |
1007 | static int ab8500_fg_convert_permille_to_mah(struct ab8500_fg *di, int cap_pm) | |
1008 | { | |
1009 | return cap_pm * di->bat_cap.max_mah_design / 1000; | |
1010 | } | |
1011 | ||
1012 | /** | |
1013 | * ab8500_fg_convert_mah_to_uwh() - Capacity in mAh to uWh | |
1014 | * @di: pointer to the ab8500_fg structure | |
1015 | * @cap_mah: capacity in mAh | |
1016 | * | |
1017 | * Converts capacity in mAh to capacity in uWh | |
1018 | */ | |
1019 | static int ab8500_fg_convert_mah_to_uwh(struct ab8500_fg *di, int cap_mah) | |
1020 | { | |
1021 | u64 div_res; | |
1022 | u32 div_rem; | |
1023 | ||
1024 | div_res = ((u64) cap_mah) * ((u64) di->vbat_nom); | |
1025 | div_rem = do_div(div_res, 1000); | |
1026 | ||
1027 | /* Make sure to round upwards if necessary */ | |
1028 | if (div_rem >= 1000 / 2) | |
1029 | div_res++; | |
1030 | ||
1031 | return (int) div_res; | |
1032 | } | |
1033 | ||
1034 | /** | |
1035 | * ab8500_fg_calc_cap_charging() - Calculate remaining capacity while charging | |
1036 | * @di: pointer to the ab8500_fg structure | |
1037 | * | |
1038 | * Return the capacity in mAh based on previous calculated capcity and the FG | |
1039 | * accumulator register value. The filter is filled with this capacity | |
1040 | */ | |
1041 | static int ab8500_fg_calc_cap_charging(struct ab8500_fg *di) | |
1042 | { | |
1043 | dev_dbg(di->dev, "%s cap_mah %d accu_charge %d\n", | |
1044 | __func__, | |
1045 | di->bat_cap.mah, | |
1046 | di->accu_charge); | |
1047 | ||
1048 | /* Capacity should not be less than 0 */ | |
1049 | if (di->bat_cap.mah + di->accu_charge > 0) | |
1050 | di->bat_cap.mah += di->accu_charge; | |
1051 | else | |
1052 | di->bat_cap.mah = 0; | |
1053 | /* | |
1054 | * We force capacity to 100% once when the algorithm | |
1055 | * reports that it's full. | |
1056 | */ | |
1057 | if (di->bat_cap.mah >= di->bat_cap.max_mah_design || | |
1058 | di->flags.force_full) { | |
1059 | di->bat_cap.mah = di->bat_cap.max_mah_design; | |
1060 | } | |
1061 | ||
1062 | ab8500_fg_fill_cap_sample(di, di->bat_cap.mah); | |
1063 | di->bat_cap.permille = | |
1064 | ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); | |
1065 | ||
1066 | /* We need to update battery voltage and inst current when charging */ | |
1067 | di->vbat = ab8500_fg_bat_voltage(di); | |
1068 | di->inst_curr = ab8500_fg_inst_curr_blocking(di); | |
1069 | ||
1070 | return di->bat_cap.mah; | |
1071 | } | |
1072 | ||
1073 | /** | |
1074 | * ab8500_fg_calc_cap_discharge_voltage() - Capacity in discharge with voltage | |
1075 | * @di: pointer to the ab8500_fg structure | |
1076 | * @comp: if voltage should be load compensated before capacity calc | |
1077 | * | |
1078 | * Return the capacity in mAh based on the battery voltage. The voltage can | |
1079 | * either be load compensated or not. This value is added to the filter and a | |
1080 | * new mean value is calculated and returned. | |
1081 | */ | |
1082 | static int ab8500_fg_calc_cap_discharge_voltage(struct ab8500_fg *di, bool comp) | |
1083 | { | |
1084 | int permille, mah; | |
1085 | ||
1086 | if (comp) | |
1087 | permille = ab8500_fg_load_comp_volt_to_capacity(di); | |
1088 | else | |
1089 | permille = ab8500_fg_uncomp_volt_to_capacity(di); | |
1090 | ||
1091 | mah = ab8500_fg_convert_permille_to_mah(di, permille); | |
1092 | ||
1093 | di->bat_cap.mah = ab8500_fg_add_cap_sample(di, mah); | |
1094 | di->bat_cap.permille = | |
1095 | ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); | |
1096 | ||
1097 | return di->bat_cap.mah; | |
1098 | } | |
1099 | ||
1100 | /** | |
1101 | * ab8500_fg_calc_cap_discharge_fg() - Capacity in discharge with FG | |
1102 | * @di: pointer to the ab8500_fg structure | |
1103 | * | |
1104 | * Return the capacity in mAh based on previous calculated capcity and the FG | |
1105 | * accumulator register value. This value is added to the filter and a | |
1106 | * new mean value is calculated and returned. | |
1107 | */ | |
1108 | static int ab8500_fg_calc_cap_discharge_fg(struct ab8500_fg *di) | |
1109 | { | |
1110 | int permille_volt, permille; | |
1111 | ||
1112 | dev_dbg(di->dev, "%s cap_mah %d accu_charge %d\n", | |
1113 | __func__, | |
1114 | di->bat_cap.mah, | |
1115 | di->accu_charge); | |
1116 | ||
1117 | /* Capacity should not be less than 0 */ | |
1118 | if (di->bat_cap.mah + di->accu_charge > 0) | |
1119 | di->bat_cap.mah += di->accu_charge; | |
1120 | else | |
1121 | di->bat_cap.mah = 0; | |
1122 | ||
1123 | if (di->bat_cap.mah >= di->bat_cap.max_mah_design) | |
1124 | di->bat_cap.mah = di->bat_cap.max_mah_design; | |
1125 | ||
1126 | /* | |
1127 | * Check against voltage based capacity. It can not be lower | |
1128 | * than what the uncompensated voltage says | |
1129 | */ | |
1130 | permille = ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); | |
1131 | permille_volt = ab8500_fg_uncomp_volt_to_capacity(di); | |
1132 | ||
1133 | if (permille < permille_volt) { | |
1134 | di->bat_cap.permille = permille_volt; | |
1135 | di->bat_cap.mah = ab8500_fg_convert_permille_to_mah(di, | |
1136 | di->bat_cap.permille); | |
1137 | ||
1138 | dev_dbg(di->dev, "%s voltage based: perm %d perm_volt %d\n", | |
1139 | __func__, | |
1140 | permille, | |
1141 | permille_volt); | |
1142 | ||
1143 | ab8500_fg_fill_cap_sample(di, di->bat_cap.mah); | |
1144 | } else { | |
1145 | ab8500_fg_fill_cap_sample(di, di->bat_cap.mah); | |
1146 | di->bat_cap.permille = | |
1147 | ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); | |
1148 | } | |
1149 | ||
1150 | return di->bat_cap.mah; | |
1151 | } | |
1152 | ||
1153 | /** | |
1154 | * ab8500_fg_capacity_level() - Get the battery capacity level | |
1155 | * @di: pointer to the ab8500_fg structure | |
1156 | * | |
1157 | * Get the battery capacity level based on the capacity in percent | |
1158 | */ | |
1159 | static int ab8500_fg_capacity_level(struct ab8500_fg *di) | |
1160 | { | |
1161 | int ret, percent; | |
1162 | ||
6eaf8740 | 1163 | percent = DIV_ROUND_CLOSEST(di->bat_cap.permille, 10); |
13151631 | 1164 | |
b0284de0 | 1165 | if (percent <= di->bm->cap_levels->critical || |
13151631 AM |
1166 | di->flags.low_bat) |
1167 | ret = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; | |
b0284de0 | 1168 | else if (percent <= di->bm->cap_levels->low) |
13151631 | 1169 | ret = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
b0284de0 | 1170 | else if (percent <= di->bm->cap_levels->normal) |
13151631 | 1171 | ret = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; |
b0284de0 | 1172 | else if (percent <= di->bm->cap_levels->high) |
13151631 AM |
1173 | ret = POWER_SUPPLY_CAPACITY_LEVEL_HIGH; |
1174 | else | |
1175 | ret = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
1176 | ||
1177 | return ret; | |
1178 | } | |
1179 | ||
ea402401 MC |
1180 | /** |
1181 | * ab8500_fg_calculate_scaled_capacity() - Capacity scaling | |
1182 | * @di: pointer to the ab8500_fg structure | |
1183 | * | |
1184 | * Calculates the capacity to be shown to upper layers. Scales the capacity | |
1185 | * to have 100% as a reference from the actual capacity upon removal of charger | |
1186 | * when charging is in maintenance mode. | |
1187 | */ | |
1188 | static int ab8500_fg_calculate_scaled_capacity(struct ab8500_fg *di) | |
1189 | { | |
1190 | struct ab8500_fg_cap_scaling *cs = &di->bat_cap.cap_scale; | |
1191 | int capacity = di->bat_cap.prev_percent; | |
1192 | ||
1193 | if (!cs->enable) | |
1194 | return capacity; | |
1195 | ||
1196 | /* | |
1197 | * As long as we are in fully charge mode scale the capacity | |
1198 | * to show 100%. | |
1199 | */ | |
1200 | if (di->flags.fully_charged) { | |
1201 | cs->cap_to_scale[0] = 100; | |
1202 | cs->cap_to_scale[1] = | |
1203 | max(capacity, di->bm->fg_params->maint_thres); | |
1204 | dev_dbg(di->dev, "Scale cap with %d/%d\n", | |
1205 | cs->cap_to_scale[0], cs->cap_to_scale[1]); | |
1206 | } | |
1207 | ||
1208 | /* Calculates the scaled capacity. */ | |
1209 | if ((cs->cap_to_scale[0] != cs->cap_to_scale[1]) | |
1210 | && (cs->cap_to_scale[1] > 0)) | |
1211 | capacity = min(100, | |
1212 | DIV_ROUND_CLOSEST(di->bat_cap.prev_percent * | |
1213 | cs->cap_to_scale[0], | |
1214 | cs->cap_to_scale[1])); | |
1215 | ||
1216 | if (di->flags.charging) { | |
1217 | if (capacity < cs->disable_cap_level) { | |
1218 | cs->disable_cap_level = capacity; | |
1219 | dev_dbg(di->dev, "Cap to stop scale lowered %d%%\n", | |
1220 | cs->disable_cap_level); | |
1221 | } else if (!di->flags.fully_charged) { | |
1222 | if (di->bat_cap.prev_percent >= | |
1223 | cs->disable_cap_level) { | |
1224 | dev_dbg(di->dev, "Disabling scaled capacity\n"); | |
1225 | cs->enable = false; | |
1226 | capacity = di->bat_cap.prev_percent; | |
1227 | } else { | |
1228 | dev_dbg(di->dev, | |
1229 | "Waiting in cap to level %d%%\n", | |
1230 | cs->disable_cap_level); | |
1231 | capacity = cs->disable_cap_level; | |
1232 | } | |
1233 | } | |
1234 | } | |
1235 | ||
1236 | return capacity; | |
1237 | } | |
1238 | ||
1239 | /** | |
1240 | * ab8500_fg_update_cap_scalers() - Capacity scaling | |
1241 | * @di: pointer to the ab8500_fg structure | |
1242 | * | |
1243 | * To be called when state change from charge<->discharge to update | |
1244 | * the capacity scalers. | |
1245 | */ | |
1246 | static void ab8500_fg_update_cap_scalers(struct ab8500_fg *di) | |
1247 | { | |
1248 | struct ab8500_fg_cap_scaling *cs = &di->bat_cap.cap_scale; | |
1249 | ||
1250 | if (!cs->enable) | |
1251 | return; | |
1252 | if (di->flags.charging) { | |
1253 | di->bat_cap.cap_scale.disable_cap_level = | |
1254 | di->bat_cap.cap_scale.scaled_cap; | |
1255 | dev_dbg(di->dev, "Cap to stop scale at charge %d%%\n", | |
1256 | di->bat_cap.cap_scale.disable_cap_level); | |
1257 | } else { | |
1258 | if (cs->scaled_cap != 100) { | |
1259 | cs->cap_to_scale[0] = cs->scaled_cap; | |
1260 | cs->cap_to_scale[1] = di->bat_cap.prev_percent; | |
1261 | } else { | |
1262 | cs->cap_to_scale[0] = 100; | |
1263 | cs->cap_to_scale[1] = | |
1264 | max(di->bat_cap.prev_percent, | |
1265 | di->bm->fg_params->maint_thres); | |
1266 | } | |
1267 | ||
1268 | dev_dbg(di->dev, "Cap to scale at discharge %d/%d\n", | |
1269 | cs->cap_to_scale[0], cs->cap_to_scale[1]); | |
1270 | } | |
1271 | } | |
1272 | ||
13151631 AM |
1273 | /** |
1274 | * ab8500_fg_check_capacity_limits() - Check if capacity has changed | |
1275 | * @di: pointer to the ab8500_fg structure | |
1276 | * @init: capacity is allowed to go up in init mode | |
1277 | * | |
1278 | * Check if capacity or capacity limit has changed and notify the system | |
1279 | * about it using the power_supply framework | |
1280 | */ | |
1281 | static void ab8500_fg_check_capacity_limits(struct ab8500_fg *di, bool init) | |
1282 | { | |
1283 | bool changed = false; | |
6eaf8740 | 1284 | int percent = DIV_ROUND_CLOSEST(di->bat_cap.permille, 10); |
13151631 AM |
1285 | |
1286 | di->bat_cap.level = ab8500_fg_capacity_level(di); | |
1287 | ||
1288 | if (di->bat_cap.level != di->bat_cap.prev_level) { | |
1289 | /* | |
1290 | * We do not allow reported capacity level to go up | |
1291 | * unless we're charging or if we're in init | |
1292 | */ | |
1293 | if (!(!di->flags.charging && di->bat_cap.level > | |
1294 | di->bat_cap.prev_level) || init) { | |
1295 | dev_dbg(di->dev, "level changed from %d to %d\n", | |
1296 | di->bat_cap.prev_level, | |
1297 | di->bat_cap.level); | |
1298 | di->bat_cap.prev_level = di->bat_cap.level; | |
1299 | changed = true; | |
1300 | } else { | |
1301 | dev_dbg(di->dev, "level not allowed to go up " | |
1302 | "since no charger is connected: %d to %d\n", | |
1303 | di->bat_cap.prev_level, | |
1304 | di->bat_cap.level); | |
1305 | } | |
1306 | } | |
1307 | ||
1308 | /* | |
1309 | * If we have received the LOW_BAT IRQ, set capacity to 0 to initiate | |
1310 | * shutdown | |
1311 | */ | |
1312 | if (di->flags.low_bat) { | |
1313 | dev_dbg(di->dev, "Battery low, set capacity to 0\n"); | |
1314 | di->bat_cap.prev_percent = 0; | |
1315 | di->bat_cap.permille = 0; | |
6eaf8740 | 1316 | percent = 0; |
13151631 AM |
1317 | di->bat_cap.prev_mah = 0; |
1318 | di->bat_cap.mah = 0; | |
1319 | changed = true; | |
1320 | } else if (di->flags.fully_charged) { | |
1321 | /* | |
1322 | * We report 100% if algorithm reported fully charged | |
ea402401 | 1323 | * and show 100% during maintenance charging (scaling). |
13151631 AM |
1324 | */ |
1325 | if (di->flags.force_full) { | |
6eaf8740 | 1326 | di->bat_cap.prev_percent = percent; |
13151631 | 1327 | di->bat_cap.prev_mah = di->bat_cap.mah; |
ea402401 MC |
1328 | |
1329 | changed = true; | |
1330 | ||
1331 | if (!di->bat_cap.cap_scale.enable && | |
1332 | di->bm->capacity_scaling) { | |
1333 | di->bat_cap.cap_scale.enable = true; | |
1334 | di->bat_cap.cap_scale.cap_to_scale[0] = 100; | |
1335 | di->bat_cap.cap_scale.cap_to_scale[1] = | |
1336 | di->bat_cap.prev_percent; | |
1337 | di->bat_cap.cap_scale.disable_cap_level = 100; | |
1338 | } | |
6eaf8740 | 1339 | } else if (di->bat_cap.prev_percent != percent) { |
13151631 AM |
1340 | dev_dbg(di->dev, |
1341 | "battery reported full " | |
1342 | "but capacity dropping: %d\n", | |
6eaf8740 | 1343 | percent); |
1344 | di->bat_cap.prev_percent = percent; | |
13151631 AM |
1345 | di->bat_cap.prev_mah = di->bat_cap.mah; |
1346 | ||
1347 | changed = true; | |
1348 | } | |
6eaf8740 | 1349 | } else if (di->bat_cap.prev_percent != percent) { |
1350 | if (percent == 0) { | |
13151631 AM |
1351 | /* |
1352 | * We will not report 0% unless we've got | |
1353 | * the LOW_BAT IRQ, no matter what the FG | |
1354 | * algorithm says. | |
1355 | */ | |
1356 | di->bat_cap.prev_percent = 1; | |
6eaf8740 | 1357 | percent = 1; |
13151631 AM |
1358 | |
1359 | changed = true; | |
1360 | } else if (!(!di->flags.charging && | |
6eaf8740 | 1361 | percent > di->bat_cap.prev_percent) || init) { |
13151631 AM |
1362 | /* |
1363 | * We do not allow reported capacity to go up | |
1364 | * unless we're charging or if we're in init | |
1365 | */ | |
1366 | dev_dbg(di->dev, | |
1367 | "capacity changed from %d to %d (%d)\n", | |
1368 | di->bat_cap.prev_percent, | |
6eaf8740 | 1369 | percent, |
13151631 | 1370 | di->bat_cap.permille); |
6eaf8740 | 1371 | di->bat_cap.prev_percent = percent; |
13151631 AM |
1372 | di->bat_cap.prev_mah = di->bat_cap.mah; |
1373 | ||
1374 | changed = true; | |
1375 | } else { | |
1376 | dev_dbg(di->dev, "capacity not allowed to go up since " | |
1377 | "no charger is connected: %d to %d (%d)\n", | |
1378 | di->bat_cap.prev_percent, | |
6eaf8740 | 1379 | percent, |
13151631 AM |
1380 | di->bat_cap.permille); |
1381 | } | |
1382 | } | |
1383 | ||
1384 | if (changed) { | |
ea402401 MC |
1385 | if (di->bm->capacity_scaling) { |
1386 | di->bat_cap.cap_scale.scaled_cap = | |
1387 | ab8500_fg_calculate_scaled_capacity(di); | |
1388 | ||
1389 | dev_info(di->dev, "capacity=%d (%d)\n", | |
1390 | di->bat_cap.prev_percent, | |
1391 | di->bat_cap.cap_scale.scaled_cap); | |
1392 | } | |
13151631 AM |
1393 | power_supply_changed(&di->fg_psy); |
1394 | if (di->flags.fully_charged && di->flags.force_full) { | |
1395 | dev_dbg(di->dev, "Battery full, notifying.\n"); | |
1396 | di->flags.force_full = false; | |
1397 | sysfs_notify(&di->fg_kobject, NULL, "charge_full"); | |
1398 | } | |
1399 | sysfs_notify(&di->fg_kobject, NULL, "charge_now"); | |
1400 | } | |
1401 | } | |
1402 | ||
1403 | static void ab8500_fg_charge_state_to(struct ab8500_fg *di, | |
1404 | enum ab8500_fg_charge_state new_state) | |
1405 | { | |
1406 | dev_dbg(di->dev, "Charge state from %d [%s] to %d [%s]\n", | |
1407 | di->charge_state, | |
1408 | charge_state[di->charge_state], | |
1409 | new_state, | |
1410 | charge_state[new_state]); | |
1411 | ||
1412 | di->charge_state = new_state; | |
1413 | } | |
1414 | ||
1415 | static void ab8500_fg_discharge_state_to(struct ab8500_fg *di, | |
0fff22ee | 1416 | enum ab8500_fg_discharge_state new_state) |
13151631 AM |
1417 | { |
1418 | dev_dbg(di->dev, "Disharge state from %d [%s] to %d [%s]\n", | |
1419 | di->discharge_state, | |
1420 | discharge_state[di->discharge_state], | |
1421 | new_state, | |
1422 | discharge_state[new_state]); | |
1423 | ||
1424 | di->discharge_state = new_state; | |
1425 | } | |
1426 | ||
1427 | /** | |
1428 | * ab8500_fg_algorithm_charging() - FG algorithm for when charging | |
1429 | * @di: pointer to the ab8500_fg structure | |
1430 | * | |
1431 | * Battery capacity calculation state machine for when we're charging | |
1432 | */ | |
1433 | static void ab8500_fg_algorithm_charging(struct ab8500_fg *di) | |
1434 | { | |
1435 | /* | |
1436 | * If we change to discharge mode | |
1437 | * we should start with recovery | |
1438 | */ | |
1439 | if (di->discharge_state != AB8500_FG_DISCHARGE_INIT_RECOVERY) | |
1440 | ab8500_fg_discharge_state_to(di, | |
1441 | AB8500_FG_DISCHARGE_INIT_RECOVERY); | |
1442 | ||
1443 | switch (di->charge_state) { | |
1444 | case AB8500_FG_CHARGE_INIT: | |
1445 | di->fg_samples = SEC_TO_SAMPLE( | |
b0284de0 | 1446 | di->bm->fg_params->accu_charging); |
13151631 AM |
1447 | |
1448 | ab8500_fg_coulomb_counter(di, true); | |
1449 | ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_READOUT); | |
1450 | ||
1451 | break; | |
1452 | ||
1453 | case AB8500_FG_CHARGE_READOUT: | |
1454 | /* | |
1455 | * Read the FG and calculate the new capacity | |
1456 | */ | |
1457 | mutex_lock(&di->cc_lock); | |
ea402401 | 1458 | if (!di->flags.conv_done && !di->flags.force_full) { |
13151631 AM |
1459 | /* Wasn't the CC IRQ that got us here */ |
1460 | mutex_unlock(&di->cc_lock); | |
1461 | dev_dbg(di->dev, "%s CC conv not done\n", | |
1462 | __func__); | |
1463 | ||
1464 | break; | |
1465 | } | |
1466 | di->flags.conv_done = false; | |
1467 | mutex_unlock(&di->cc_lock); | |
1468 | ||
1469 | ab8500_fg_calc_cap_charging(di); | |
1470 | ||
1471 | break; | |
1472 | ||
1473 | default: | |
1474 | break; | |
1475 | } | |
1476 | ||
1477 | /* Check capacity limits */ | |
1478 | ab8500_fg_check_capacity_limits(di, false); | |
1479 | } | |
1480 | ||
1481 | static void force_capacity(struct ab8500_fg *di) | |
1482 | { | |
1483 | int cap; | |
1484 | ||
1485 | ab8500_fg_clear_cap_samples(di); | |
1486 | cap = di->bat_cap.user_mah; | |
1487 | if (cap > di->bat_cap.max_mah_design) { | |
1488 | dev_dbg(di->dev, "Remaining cap %d can't be bigger than total" | |
1489 | " %d\n", cap, di->bat_cap.max_mah_design); | |
1490 | cap = di->bat_cap.max_mah_design; | |
1491 | } | |
1492 | ab8500_fg_fill_cap_sample(di, di->bat_cap.user_mah); | |
1493 | di->bat_cap.permille = ab8500_fg_convert_mah_to_permille(di, cap); | |
1494 | di->bat_cap.mah = cap; | |
1495 | ab8500_fg_check_capacity_limits(di, true); | |
1496 | } | |
1497 | ||
1498 | static bool check_sysfs_capacity(struct ab8500_fg *di) | |
1499 | { | |
1500 | int cap, lower, upper; | |
1501 | int cap_permille; | |
1502 | ||
1503 | cap = di->bat_cap.user_mah; | |
1504 | ||
1505 | cap_permille = ab8500_fg_convert_mah_to_permille(di, | |
1506 | di->bat_cap.user_mah); | |
1507 | ||
b0284de0 LJ |
1508 | lower = di->bat_cap.permille - di->bm->fg_params->user_cap_limit * 10; |
1509 | upper = di->bat_cap.permille + di->bm->fg_params->user_cap_limit * 10; | |
13151631 AM |
1510 | |
1511 | if (lower < 0) | |
1512 | lower = 0; | |
1513 | /* 1000 is permille, -> 100 percent */ | |
1514 | if (upper > 1000) | |
1515 | upper = 1000; | |
1516 | ||
1517 | dev_dbg(di->dev, "Capacity limits:" | |
1518 | " (Lower: %d User: %d Upper: %d) [user: %d, was: %d]\n", | |
1519 | lower, cap_permille, upper, cap, di->bat_cap.mah); | |
1520 | ||
1521 | /* If within limits, use the saved capacity and exit estimation...*/ | |
1522 | if (cap_permille > lower && cap_permille < upper) { | |
1523 | dev_dbg(di->dev, "OK! Using users cap %d uAh now\n", cap); | |
1524 | force_capacity(di); | |
1525 | return true; | |
1526 | } | |
1527 | dev_dbg(di->dev, "Capacity from user out of limits, ignoring"); | |
1528 | return false; | |
1529 | } | |
1530 | ||
1531 | /** | |
1532 | * ab8500_fg_algorithm_discharging() - FG algorithm for when discharging | |
1533 | * @di: pointer to the ab8500_fg structure | |
1534 | * | |
1535 | * Battery capacity calculation state machine for when we're discharging | |
1536 | */ | |
1537 | static void ab8500_fg_algorithm_discharging(struct ab8500_fg *di) | |
1538 | { | |
1539 | int sleep_time; | |
1540 | ||
1541 | /* If we change to charge mode we should start with init */ | |
1542 | if (di->charge_state != AB8500_FG_CHARGE_INIT) | |
1543 | ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT); | |
1544 | ||
1545 | switch (di->discharge_state) { | |
1546 | case AB8500_FG_DISCHARGE_INIT: | |
1547 | /* We use the FG IRQ to work on */ | |
1548 | di->init_cnt = 0; | |
b0284de0 | 1549 | di->fg_samples = SEC_TO_SAMPLE(di->bm->fg_params->init_timer); |
13151631 AM |
1550 | ab8500_fg_coulomb_counter(di, true); |
1551 | ab8500_fg_discharge_state_to(di, | |
1552 | AB8500_FG_DISCHARGE_INITMEASURING); | |
1553 | ||
1554 | /* Intentional fallthrough */ | |
1555 | case AB8500_FG_DISCHARGE_INITMEASURING: | |
1556 | /* | |
1557 | * Discard a number of samples during startup. | |
1558 | * After that, use compensated voltage for a few | |
1559 | * samples to get an initial capacity. | |
1560 | * Then go to READOUT | |
1561 | */ | |
b0284de0 | 1562 | sleep_time = di->bm->fg_params->init_timer; |
13151631 AM |
1563 | |
1564 | /* Discard the first [x] seconds */ | |
b0284de0 | 1565 | if (di->init_cnt > di->bm->fg_params->init_discard_time) { |
13151631 AM |
1566 | ab8500_fg_calc_cap_discharge_voltage(di, true); |
1567 | ||
1568 | ab8500_fg_check_capacity_limits(di, true); | |
1569 | } | |
1570 | ||
1571 | di->init_cnt += sleep_time; | |
b0284de0 | 1572 | if (di->init_cnt > di->bm->fg_params->init_total_time) |
13151631 AM |
1573 | ab8500_fg_discharge_state_to(di, |
1574 | AB8500_FG_DISCHARGE_READOUT_INIT); | |
1575 | ||
1576 | break; | |
1577 | ||
1578 | case AB8500_FG_DISCHARGE_INIT_RECOVERY: | |
1579 | di->recovery_cnt = 0; | |
1580 | di->recovery_needed = true; | |
1581 | ab8500_fg_discharge_state_to(di, | |
1582 | AB8500_FG_DISCHARGE_RECOVERY); | |
1583 | ||
1584 | /* Intentional fallthrough */ | |
1585 | ||
1586 | case AB8500_FG_DISCHARGE_RECOVERY: | |
b0284de0 | 1587 | sleep_time = di->bm->fg_params->recovery_sleep_timer; |
13151631 AM |
1588 | |
1589 | /* | |
1590 | * We should check the power consumption | |
1591 | * If low, go to READOUT (after x min) or | |
1592 | * RECOVERY_SLEEP if time left. | |
1593 | * If high, go to READOUT | |
1594 | */ | |
1595 | di->inst_curr = ab8500_fg_inst_curr_blocking(di); | |
1596 | ||
1597 | if (ab8500_fg_is_low_curr(di, di->inst_curr)) { | |
1598 | if (di->recovery_cnt > | |
b0284de0 | 1599 | di->bm->fg_params->recovery_total_time) { |
13151631 | 1600 | di->fg_samples = SEC_TO_SAMPLE( |
b0284de0 | 1601 | di->bm->fg_params->accu_high_curr); |
13151631 AM |
1602 | ab8500_fg_coulomb_counter(di, true); |
1603 | ab8500_fg_discharge_state_to(di, | |
1604 | AB8500_FG_DISCHARGE_READOUT); | |
1605 | di->recovery_needed = false; | |
1606 | } else { | |
1607 | queue_delayed_work(di->fg_wq, | |
1608 | &di->fg_periodic_work, | |
1609 | sleep_time * HZ); | |
1610 | } | |
1611 | di->recovery_cnt += sleep_time; | |
1612 | } else { | |
1613 | di->fg_samples = SEC_TO_SAMPLE( | |
b0284de0 | 1614 | di->bm->fg_params->accu_high_curr); |
13151631 AM |
1615 | ab8500_fg_coulomb_counter(di, true); |
1616 | ab8500_fg_discharge_state_to(di, | |
1617 | AB8500_FG_DISCHARGE_READOUT); | |
1618 | } | |
1619 | break; | |
1620 | ||
1621 | case AB8500_FG_DISCHARGE_READOUT_INIT: | |
1622 | di->fg_samples = SEC_TO_SAMPLE( | |
b0284de0 | 1623 | di->bm->fg_params->accu_high_curr); |
13151631 AM |
1624 | ab8500_fg_coulomb_counter(di, true); |
1625 | ab8500_fg_discharge_state_to(di, | |
1626 | AB8500_FG_DISCHARGE_READOUT); | |
1627 | break; | |
1628 | ||
1629 | case AB8500_FG_DISCHARGE_READOUT: | |
1630 | di->inst_curr = ab8500_fg_inst_curr_blocking(di); | |
1631 | ||
1632 | if (ab8500_fg_is_low_curr(di, di->inst_curr)) { | |
1633 | /* Detect mode change */ | |
1634 | if (di->high_curr_mode) { | |
1635 | di->high_curr_mode = false; | |
1636 | di->high_curr_cnt = 0; | |
1637 | } | |
1638 | ||
1639 | if (di->recovery_needed) { | |
1640 | ab8500_fg_discharge_state_to(di, | |
ffaa39d9 | 1641 | AB8500_FG_DISCHARGE_INIT_RECOVERY); |
13151631 AM |
1642 | |
1643 | queue_delayed_work(di->fg_wq, | |
1644 | &di->fg_periodic_work, 0); | |
1645 | ||
1646 | break; | |
1647 | } | |
1648 | ||
1649 | ab8500_fg_calc_cap_discharge_voltage(di, true); | |
1650 | } else { | |
1651 | mutex_lock(&di->cc_lock); | |
1652 | if (!di->flags.conv_done) { | |
1653 | /* Wasn't the CC IRQ that got us here */ | |
1654 | mutex_unlock(&di->cc_lock); | |
1655 | dev_dbg(di->dev, "%s CC conv not done\n", | |
1656 | __func__); | |
1657 | ||
1658 | break; | |
1659 | } | |
1660 | di->flags.conv_done = false; | |
1661 | mutex_unlock(&di->cc_lock); | |
1662 | ||
1663 | /* Detect mode change */ | |
1664 | if (!di->high_curr_mode) { | |
1665 | di->high_curr_mode = true; | |
1666 | di->high_curr_cnt = 0; | |
1667 | } | |
1668 | ||
1669 | di->high_curr_cnt += | |
b0284de0 | 1670 | di->bm->fg_params->accu_high_curr; |
13151631 | 1671 | if (di->high_curr_cnt > |
b0284de0 | 1672 | di->bm->fg_params->high_curr_time) |
13151631 AM |
1673 | di->recovery_needed = true; |
1674 | ||
1675 | ab8500_fg_calc_cap_discharge_fg(di); | |
1676 | } | |
1677 | ||
1678 | ab8500_fg_check_capacity_limits(di, false); | |
1679 | ||
1680 | break; | |
1681 | ||
1682 | case AB8500_FG_DISCHARGE_WAKEUP: | |
13151631 AM |
1683 | ab8500_fg_calc_cap_discharge_voltage(di, true); |
1684 | ||
1685 | di->fg_samples = SEC_TO_SAMPLE( | |
b0284de0 | 1686 | di->bm->fg_params->accu_high_curr); |
13151631 AM |
1687 | ab8500_fg_coulomb_counter(di, true); |
1688 | ab8500_fg_discharge_state_to(di, | |
1689 | AB8500_FG_DISCHARGE_READOUT); | |
1690 | ||
1691 | ab8500_fg_check_capacity_limits(di, false); | |
1692 | ||
1693 | break; | |
1694 | ||
1695 | default: | |
1696 | break; | |
1697 | } | |
1698 | } | |
1699 | ||
1700 | /** | |
1701 | * ab8500_fg_algorithm_calibrate() - Internal columb counter offset calibration | |
1702 | * @di: pointer to the ab8500_fg structure | |
1703 | * | |
1704 | */ | |
1705 | static void ab8500_fg_algorithm_calibrate(struct ab8500_fg *di) | |
1706 | { | |
1707 | int ret; | |
1708 | ||
1709 | switch (di->calib_state) { | |
1710 | case AB8500_FG_CALIB_INIT: | |
1711 | dev_dbg(di->dev, "Calibration ongoing...\n"); | |
1712 | ||
1713 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1714 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
1715 | CC_INT_CAL_N_AVG_MASK, CC_INT_CAL_SAMPLES_8); | |
1716 | if (ret < 0) | |
1717 | goto err; | |
1718 | ||
1719 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1720 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
1721 | CC_INTAVGOFFSET_ENA, CC_INTAVGOFFSET_ENA); | |
1722 | if (ret < 0) | |
1723 | goto err; | |
1724 | di->calib_state = AB8500_FG_CALIB_WAIT; | |
1725 | break; | |
1726 | case AB8500_FG_CALIB_END: | |
1727 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1728 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
1729 | CC_MUXOFFSET, CC_MUXOFFSET); | |
1730 | if (ret < 0) | |
1731 | goto err; | |
1732 | di->flags.calibrate = false; | |
1733 | dev_dbg(di->dev, "Calibration done...\n"); | |
1734 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
1735 | break; | |
1736 | case AB8500_FG_CALIB_WAIT: | |
1737 | dev_dbg(di->dev, "Calibration WFI\n"); | |
1738 | default: | |
1739 | break; | |
1740 | } | |
1741 | return; | |
1742 | err: | |
1743 | /* Something went wrong, don't calibrate then */ | |
1744 | dev_err(di->dev, "failed to calibrate the CC\n"); | |
1745 | di->flags.calibrate = false; | |
1746 | di->calib_state = AB8500_FG_CALIB_INIT; | |
1747 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
1748 | } | |
1749 | ||
1750 | /** | |
1751 | * ab8500_fg_algorithm() - Entry point for the FG algorithm | |
1752 | * @di: pointer to the ab8500_fg structure | |
1753 | * | |
1754 | * Entry point for the battery capacity calculation state machine | |
1755 | */ | |
1756 | static void ab8500_fg_algorithm(struct ab8500_fg *di) | |
1757 | { | |
1758 | if (di->flags.calibrate) | |
1759 | ab8500_fg_algorithm_calibrate(di); | |
1760 | else { | |
1761 | if (di->flags.charging) | |
1762 | ab8500_fg_algorithm_charging(di); | |
1763 | else | |
1764 | ab8500_fg_algorithm_discharging(di); | |
1765 | } | |
1766 | ||
64277618 | 1767 | dev_dbg(di->dev, "[FG_DATA] %d %d %d %d %d %d %d %d %d %d " |
13151631 AM |
1768 | "%d %d %d %d %d %d %d\n", |
1769 | di->bat_cap.max_mah_design, | |
64277618 | 1770 | di->bat_cap.max_mah, |
13151631 AM |
1771 | di->bat_cap.mah, |
1772 | di->bat_cap.permille, | |
1773 | di->bat_cap.level, | |
1774 | di->bat_cap.prev_mah, | |
1775 | di->bat_cap.prev_percent, | |
1776 | di->bat_cap.prev_level, | |
1777 | di->vbat, | |
1778 | di->inst_curr, | |
1779 | di->avg_curr, | |
1780 | di->accu_charge, | |
1781 | di->flags.charging, | |
1782 | di->charge_state, | |
1783 | di->discharge_state, | |
1784 | di->high_curr_mode, | |
1785 | di->recovery_needed); | |
1786 | } | |
1787 | ||
1788 | /** | |
1789 | * ab8500_fg_periodic_work() - Run the FG state machine periodically | |
1790 | * @work: pointer to the work_struct structure | |
1791 | * | |
1792 | * Work queue function for periodic work | |
1793 | */ | |
1794 | static void ab8500_fg_periodic_work(struct work_struct *work) | |
1795 | { | |
1796 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, | |
1797 | fg_periodic_work.work); | |
1798 | ||
1799 | if (di->init_capacity) { | |
13151631 AM |
1800 | /* Get an initial capacity calculation */ |
1801 | ab8500_fg_calc_cap_discharge_voltage(di, true); | |
1802 | ab8500_fg_check_capacity_limits(di, true); | |
1803 | di->init_capacity = false; | |
1804 | ||
1805 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
1806 | } else if (di->flags.user_cap) { | |
1807 | if (check_sysfs_capacity(di)) { | |
1808 | ab8500_fg_check_capacity_limits(di, true); | |
1809 | if (di->flags.charging) | |
1810 | ab8500_fg_charge_state_to(di, | |
1811 | AB8500_FG_CHARGE_INIT); | |
1812 | else | |
1813 | ab8500_fg_discharge_state_to(di, | |
1814 | AB8500_FG_DISCHARGE_READOUT_INIT); | |
1815 | } | |
1816 | di->flags.user_cap = false; | |
1817 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
1818 | } else | |
1819 | ab8500_fg_algorithm(di); | |
1820 | ||
1821 | } | |
1822 | ||
1823 | /** | |
1824 | * ab8500_fg_check_hw_failure_work() - Check OVV_BAT condition | |
1825 | * @work: pointer to the work_struct structure | |
1826 | * | |
1827 | * Work queue function for checking the OVV_BAT condition | |
1828 | */ | |
1829 | static void ab8500_fg_check_hw_failure_work(struct work_struct *work) | |
1830 | { | |
1831 | int ret; | |
1832 | u8 reg_value; | |
1833 | ||
1834 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, | |
1835 | fg_check_hw_failure_work.work); | |
1836 | ||
1837 | /* | |
1838 | * If we have had a battery over-voltage situation, | |
1839 | * check ovv-bit to see if it should be reset. | |
1840 | */ | |
8bcf3b39 HB |
1841 | ret = abx500_get_register_interruptible(di->dev, |
1842 | AB8500_CHARGER, AB8500_CH_STAT_REG, | |
1843 | ®_value); | |
1844 | if (ret < 0) { | |
1845 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
1846 | return; | |
1847 | } | |
1848 | if ((reg_value & BATT_OVV) == BATT_OVV) { | |
1849 | if (!di->flags.bat_ovv) { | |
1850 | dev_dbg(di->dev, "Battery OVV\n"); | |
1851 | di->flags.bat_ovv = true; | |
13151631 | 1852 | power_supply_changed(&di->fg_psy); |
13151631 | 1853 | } |
13151631 AM |
1854 | /* Not yet recovered from ovv, reschedule this test */ |
1855 | queue_delayed_work(di->fg_wq, &di->fg_check_hw_failure_work, | |
41ce2565 | 1856 | HZ); |
8bcf3b39 HB |
1857 | } else { |
1858 | dev_dbg(di->dev, "Battery recovered from OVV\n"); | |
1859 | di->flags.bat_ovv = false; | |
1860 | power_supply_changed(&di->fg_psy); | |
13151631 AM |
1861 | } |
1862 | } | |
1863 | ||
1864 | /** | |
1865 | * ab8500_fg_low_bat_work() - Check LOW_BAT condition | |
1866 | * @work: pointer to the work_struct structure | |
1867 | * | |
1868 | * Work queue function for checking the LOW_BAT condition | |
1869 | */ | |
1870 | static void ab8500_fg_low_bat_work(struct work_struct *work) | |
1871 | { | |
1872 | int vbat; | |
1873 | ||
1874 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, | |
1875 | fg_low_bat_work.work); | |
1876 | ||
1877 | vbat = ab8500_fg_bat_voltage(di); | |
1878 | ||
1879 | /* Check if LOW_BAT still fulfilled */ | |
b0284de0 | 1880 | if (vbat < di->bm->fg_params->lowbat_threshold) { |
75f2a219 HB |
1881 | /* Is it time to shut down? */ |
1882 | if (di->low_bat_cnt < 1) { | |
1883 | di->flags.low_bat = true; | |
1884 | dev_warn(di->dev, "Shut down pending...\n"); | |
1885 | } else { | |
1886 | /* | |
1887 | * Else we need to re-schedule this check to be able to detect | |
1888 | * if the voltage increases again during charging or | |
1889 | * due to decreasing load. | |
1890 | */ | |
1891 | di->low_bat_cnt--; | |
1892 | dev_warn(di->dev, "Battery voltage still LOW\n"); | |
1893 | queue_delayed_work(di->fg_wq, &di->fg_low_bat_work, | |
1894 | round_jiffies(LOW_BAT_CHECK_INTERVAL)); | |
1895 | } | |
13151631 | 1896 | } else { |
75f2a219 HB |
1897 | di->flags.low_bat_delay = false; |
1898 | di->low_bat_cnt = 10; | |
13151631 AM |
1899 | dev_warn(di->dev, "Battery voltage OK again\n"); |
1900 | } | |
1901 | ||
1902 | /* This is needed to dispatch LOW_BAT */ | |
1903 | ab8500_fg_check_capacity_limits(di, false); | |
13151631 AM |
1904 | } |
1905 | ||
1906 | /** | |
1907 | * ab8500_fg_battok_calc - calculate the bit pattern corresponding | |
1908 | * to the target voltage. | |
1909 | * @di: pointer to the ab8500_fg structure | |
1910 | * @target target voltage | |
1911 | * | |
1912 | * Returns bit pattern closest to the target voltage | |
1913 | * valid return values are 0-14. (0-BATT_OK_MAX_NR_INCREMENTS) | |
1914 | */ | |
1915 | ||
1916 | static int ab8500_fg_battok_calc(struct ab8500_fg *di, int target) | |
1917 | { | |
1918 | if (target > BATT_OK_MIN + | |
1919 | (BATT_OK_INCREMENT * BATT_OK_MAX_NR_INCREMENTS)) | |
1920 | return BATT_OK_MAX_NR_INCREMENTS; | |
1921 | if (target < BATT_OK_MIN) | |
1922 | return 0; | |
1923 | return (target - BATT_OK_MIN) / BATT_OK_INCREMENT; | |
1924 | } | |
1925 | ||
1926 | /** | |
1927 | * ab8500_fg_battok_init_hw_register - init battok levels | |
1928 | * @di: pointer to the ab8500_fg structure | |
1929 | * | |
1930 | */ | |
1931 | ||
1932 | static int ab8500_fg_battok_init_hw_register(struct ab8500_fg *di) | |
1933 | { | |
1934 | int selected; | |
1935 | int sel0; | |
1936 | int sel1; | |
1937 | int cbp_sel0; | |
1938 | int cbp_sel1; | |
1939 | int ret; | |
1940 | int new_val; | |
1941 | ||
b0284de0 LJ |
1942 | sel0 = di->bm->fg_params->battok_falling_th_sel0; |
1943 | sel1 = di->bm->fg_params->battok_raising_th_sel1; | |
13151631 AM |
1944 | |
1945 | cbp_sel0 = ab8500_fg_battok_calc(di, sel0); | |
1946 | cbp_sel1 = ab8500_fg_battok_calc(di, sel1); | |
1947 | ||
1948 | selected = BATT_OK_MIN + cbp_sel0 * BATT_OK_INCREMENT; | |
1949 | ||
1950 | if (selected != sel0) | |
1951 | dev_warn(di->dev, "Invalid voltage step:%d, using %d %d\n", | |
1952 | sel0, selected, cbp_sel0); | |
1953 | ||
1954 | selected = BATT_OK_MIN + cbp_sel1 * BATT_OK_INCREMENT; | |
1955 | ||
1956 | if (selected != sel1) | |
1957 | dev_warn(di->dev, "Invalid voltage step:%d, using %d %d\n", | |
1958 | sel1, selected, cbp_sel1); | |
1959 | ||
1960 | new_val = cbp_sel0 | (cbp_sel1 << 4); | |
1961 | ||
1962 | dev_dbg(di->dev, "using: %x %d %d\n", new_val, cbp_sel0, cbp_sel1); | |
1963 | ret = abx500_set_register_interruptible(di->dev, AB8500_SYS_CTRL2_BLOCK, | |
1964 | AB8500_BATT_OK_REG, new_val); | |
1965 | return ret; | |
1966 | } | |
1967 | ||
1968 | /** | |
1969 | * ab8500_fg_instant_work() - Run the FG state machine instantly | |
1970 | * @work: pointer to the work_struct structure | |
1971 | * | |
1972 | * Work queue function for instant work | |
1973 | */ | |
1974 | static void ab8500_fg_instant_work(struct work_struct *work) | |
1975 | { | |
1976 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, fg_work); | |
1977 | ||
1978 | ab8500_fg_algorithm(di); | |
1979 | } | |
1980 | ||
1981 | /** | |
7a2cf9ba | 1982 | * ab8500_fg_cc_data_end_handler() - end of data conversion isr. |
13151631 AM |
1983 | * @irq: interrupt number |
1984 | * @_di: pointer to the ab8500_fg structure | |
1985 | * | |
1986 | * Returns IRQ status(IRQ_HANDLED) | |
1987 | */ | |
1988 | static irqreturn_t ab8500_fg_cc_data_end_handler(int irq, void *_di) | |
1989 | { | |
1990 | struct ab8500_fg *di = _di; | |
3988a4df JB |
1991 | if (!di->nbr_cceoc_irq_cnt) { |
1992 | di->nbr_cceoc_irq_cnt++; | |
1993 | complete(&di->ab8500_fg_started); | |
1994 | } else { | |
1995 | di->nbr_cceoc_irq_cnt = 0; | |
1996 | complete(&di->ab8500_fg_complete); | |
1997 | } | |
13151631 AM |
1998 | return IRQ_HANDLED; |
1999 | } | |
2000 | ||
2001 | /** | |
7a2cf9ba | 2002 | * ab8500_fg_cc_int_calib_handler () - end of calibration isr. |
13151631 AM |
2003 | * @irq: interrupt number |
2004 | * @_di: pointer to the ab8500_fg structure | |
2005 | * | |
2006 | * Returns IRQ status(IRQ_HANDLED) | |
2007 | */ | |
2008 | static irqreturn_t ab8500_fg_cc_int_calib_handler(int irq, void *_di) | |
2009 | { | |
2010 | struct ab8500_fg *di = _di; | |
2011 | di->calib_state = AB8500_FG_CALIB_END; | |
2012 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
2013 | return IRQ_HANDLED; | |
2014 | } | |
2015 | ||
2016 | /** | |
2017 | * ab8500_fg_cc_convend_handler() - isr to get battery avg current. | |
2018 | * @irq: interrupt number | |
2019 | * @_di: pointer to the ab8500_fg structure | |
2020 | * | |
2021 | * Returns IRQ status(IRQ_HANDLED) | |
2022 | */ | |
2023 | static irqreturn_t ab8500_fg_cc_convend_handler(int irq, void *_di) | |
2024 | { | |
2025 | struct ab8500_fg *di = _di; | |
2026 | ||
2027 | queue_work(di->fg_wq, &di->fg_acc_cur_work); | |
2028 | ||
2029 | return IRQ_HANDLED; | |
2030 | } | |
2031 | ||
2032 | /** | |
2033 | * ab8500_fg_batt_ovv_handler() - Battery OVV occured | |
2034 | * @irq: interrupt number | |
2035 | * @_di: pointer to the ab8500_fg structure | |
2036 | * | |
2037 | * Returns IRQ status(IRQ_HANDLED) | |
2038 | */ | |
2039 | static irqreturn_t ab8500_fg_batt_ovv_handler(int irq, void *_di) | |
2040 | { | |
2041 | struct ab8500_fg *di = _di; | |
2042 | ||
2043 | dev_dbg(di->dev, "Battery OVV\n"); | |
13151631 AM |
2044 | |
2045 | /* Schedule a new HW failure check */ | |
2046 | queue_delayed_work(di->fg_wq, &di->fg_check_hw_failure_work, 0); | |
2047 | ||
2048 | return IRQ_HANDLED; | |
2049 | } | |
2050 | ||
2051 | /** | |
2052 | * ab8500_fg_lowbatf_handler() - Battery voltage is below LOW threshold | |
2053 | * @irq: interrupt number | |
2054 | * @_di: pointer to the ab8500_fg structure | |
2055 | * | |
2056 | * Returns IRQ status(IRQ_HANDLED) | |
2057 | */ | |
2058 | static irqreturn_t ab8500_fg_lowbatf_handler(int irq, void *_di) | |
2059 | { | |
2060 | struct ab8500_fg *di = _di; | |
2061 | ||
75f2a219 | 2062 | /* Initiate handling in ab8500_fg_low_bat_work() if not already initiated. */ |
13151631 AM |
2063 | if (!di->flags.low_bat_delay) { |
2064 | dev_warn(di->dev, "Battery voltage is below LOW threshold\n"); | |
2065 | di->flags.low_bat_delay = true; | |
2066 | /* | |
2067 | * Start a timer to check LOW_BAT again after some time | |
2068 | * This is done to avoid shutdown on single voltage dips | |
2069 | */ | |
2070 | queue_delayed_work(di->fg_wq, &di->fg_low_bat_work, | |
2071 | round_jiffies(LOW_BAT_CHECK_INTERVAL)); | |
2072 | } | |
2073 | return IRQ_HANDLED; | |
2074 | } | |
2075 | ||
2076 | /** | |
2077 | * ab8500_fg_get_property() - get the fg properties | |
2078 | * @psy: pointer to the power_supply structure | |
2079 | * @psp: pointer to the power_supply_property structure | |
2080 | * @val: pointer to the power_supply_propval union | |
2081 | * | |
2082 | * This function gets called when an application tries to get the | |
2083 | * fg properties by reading the sysfs files. | |
2084 | * voltage_now: battery voltage | |
2085 | * current_now: battery instant current | |
2086 | * current_avg: battery average current | |
2087 | * charge_full_design: capacity where battery is considered full | |
2088 | * charge_now: battery capacity in nAh | |
2089 | * capacity: capacity in percent | |
2090 | * capacity_level: capacity level | |
2091 | * | |
2092 | * Returns error code in case of failure else 0 on success | |
2093 | */ | |
2094 | static int ab8500_fg_get_property(struct power_supply *psy, | |
2095 | enum power_supply_property psp, | |
2096 | union power_supply_propval *val) | |
2097 | { | |
2098 | struct ab8500_fg *di; | |
2099 | ||
2100 | di = to_ab8500_fg_device_info(psy); | |
2101 | ||
2102 | /* | |
2103 | * If battery is identified as unknown and charging of unknown | |
2104 | * batteries is disabled, we always report 100% capacity and | |
2105 | * capacity level UNKNOWN, since we can't calculate | |
2106 | * remaining capacity | |
2107 | */ | |
2108 | ||
2109 | switch (psp) { | |
2110 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
2111 | if (di->flags.bat_ovv) | |
2112 | val->intval = BATT_OVV_VALUE * 1000; | |
2113 | else | |
2114 | val->intval = di->vbat * 1000; | |
2115 | break; | |
2116 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
2117 | val->intval = di->inst_curr * 1000; | |
2118 | break; | |
2119 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
2120 | val->intval = di->avg_curr * 1000; | |
2121 | break; | |
2122 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
2123 | val->intval = ab8500_fg_convert_mah_to_uwh(di, | |
2124 | di->bat_cap.max_mah_design); | |
2125 | break; | |
2126 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
2127 | val->intval = ab8500_fg_convert_mah_to_uwh(di, | |
2128 | di->bat_cap.max_mah); | |
2129 | break; | |
2130 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
b0284de0 | 2131 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
13151631 AM |
2132 | di->flags.batt_id_received) |
2133 | val->intval = ab8500_fg_convert_mah_to_uwh(di, | |
2134 | di->bat_cap.max_mah); | |
2135 | else | |
2136 | val->intval = ab8500_fg_convert_mah_to_uwh(di, | |
2137 | di->bat_cap.prev_mah); | |
2138 | break; | |
2139 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
2140 | val->intval = di->bat_cap.max_mah_design; | |
2141 | break; | |
2142 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
2143 | val->intval = di->bat_cap.max_mah; | |
2144 | break; | |
2145 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
b0284de0 | 2146 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
13151631 AM |
2147 | di->flags.batt_id_received) |
2148 | val->intval = di->bat_cap.max_mah; | |
2149 | else | |
2150 | val->intval = di->bat_cap.prev_mah; | |
2151 | break; | |
2152 | case POWER_SUPPLY_PROP_CAPACITY: | |
e82c5bdb | 2153 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
13151631 AM |
2154 | di->flags.batt_id_received) |
2155 | val->intval = 100; | |
2156 | else | |
2157 | val->intval = di->bat_cap.prev_percent; | |
2158 | break; | |
2159 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: | |
b0284de0 | 2160 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
13151631 AM |
2161 | di->flags.batt_id_received) |
2162 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN; | |
2163 | else | |
2164 | val->intval = di->bat_cap.prev_level; | |
2165 | break; | |
2166 | default: | |
2167 | return -EINVAL; | |
2168 | } | |
2169 | return 0; | |
2170 | } | |
2171 | ||
2172 | static int ab8500_fg_get_ext_psy_data(struct device *dev, void *data) | |
2173 | { | |
2174 | struct power_supply *psy; | |
2175 | struct power_supply *ext; | |
2176 | struct ab8500_fg *di; | |
2177 | union power_supply_propval ret; | |
2178 | int i, j; | |
2179 | bool psy_found = false; | |
2180 | ||
2181 | psy = (struct power_supply *)data; | |
2182 | ext = dev_get_drvdata(dev); | |
2183 | di = to_ab8500_fg_device_info(psy); | |
2184 | ||
2185 | /* | |
2186 | * For all psy where the name of your driver | |
2187 | * appears in any supplied_to | |
2188 | */ | |
2189 | for (i = 0; i < ext->num_supplicants; i++) { | |
2190 | if (!strcmp(ext->supplied_to[i], psy->name)) | |
2191 | psy_found = true; | |
2192 | } | |
2193 | ||
2194 | if (!psy_found) | |
2195 | return 0; | |
2196 | ||
2197 | /* Go through all properties for the psy */ | |
2198 | for (j = 0; j < ext->num_properties; j++) { | |
2199 | enum power_supply_property prop; | |
2200 | prop = ext->properties[j]; | |
2201 | ||
2202 | if (ext->get_property(ext, prop, &ret)) | |
2203 | continue; | |
2204 | ||
2205 | switch (prop) { | |
2206 | case POWER_SUPPLY_PROP_STATUS: | |
2207 | switch (ext->type) { | |
2208 | case POWER_SUPPLY_TYPE_BATTERY: | |
2209 | switch (ret.intval) { | |
2210 | case POWER_SUPPLY_STATUS_UNKNOWN: | |
2211 | case POWER_SUPPLY_STATUS_DISCHARGING: | |
2212 | case POWER_SUPPLY_STATUS_NOT_CHARGING: | |
2213 | if (!di->flags.charging) | |
2214 | break; | |
2215 | di->flags.charging = false; | |
2216 | di->flags.fully_charged = false; | |
ea402401 MC |
2217 | if (di->bm->capacity_scaling) |
2218 | ab8500_fg_update_cap_scalers(di); | |
13151631 AM |
2219 | queue_work(di->fg_wq, &di->fg_work); |
2220 | break; | |
2221 | case POWER_SUPPLY_STATUS_FULL: | |
2222 | if (di->flags.fully_charged) | |
2223 | break; | |
2224 | di->flags.fully_charged = true; | |
2225 | di->flags.force_full = true; | |
2226 | /* Save current capacity as maximum */ | |
2227 | di->bat_cap.max_mah = di->bat_cap.mah; | |
2228 | queue_work(di->fg_wq, &di->fg_work); | |
2229 | break; | |
2230 | case POWER_SUPPLY_STATUS_CHARGING: | |
ea402401 MC |
2231 | if (di->flags.charging && |
2232 | !di->flags.fully_charged) | |
13151631 AM |
2233 | break; |
2234 | di->flags.charging = true; | |
2235 | di->flags.fully_charged = false; | |
ea402401 MC |
2236 | if (di->bm->capacity_scaling) |
2237 | ab8500_fg_update_cap_scalers(di); | |
13151631 AM |
2238 | queue_work(di->fg_wq, &di->fg_work); |
2239 | break; | |
2240 | }; | |
2241 | default: | |
2242 | break; | |
2243 | }; | |
2244 | break; | |
2245 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
2246 | switch (ext->type) { | |
2247 | case POWER_SUPPLY_TYPE_BATTERY: | |
1a793a10 RK |
2248 | if (!di->flags.batt_id_received && |
2249 | di->bm->batt_id != BATTERY_UNKNOWN) { | |
c34a61b4 AV |
2250 | const struct abx500_battery_type *b; |
2251 | ||
b0284de0 | 2252 | b = &(di->bm->bat_type[di->bm->batt_id]); |
13151631 AM |
2253 | |
2254 | di->flags.batt_id_received = true; | |
2255 | ||
2256 | di->bat_cap.max_mah_design = | |
2257 | MILLI_TO_MICRO * | |
2258 | b->charge_full_design; | |
2259 | ||
2260 | di->bat_cap.max_mah = | |
2261 | di->bat_cap.max_mah_design; | |
2262 | ||
2263 | di->vbat_nom = b->nominal_voltage; | |
2264 | } | |
2265 | ||
2266 | if (ret.intval) | |
2267 | di->flags.batt_unknown = false; | |
2268 | else | |
2269 | di->flags.batt_unknown = true; | |
2270 | break; | |
2271 | default: | |
2272 | break; | |
2273 | } | |
2274 | break; | |
2275 | case POWER_SUPPLY_PROP_TEMP: | |
2276 | switch (ext->type) { | |
2277 | case POWER_SUPPLY_TYPE_BATTERY: | |
ea402401 MC |
2278 | if (di->flags.batt_id_received) |
2279 | di->bat_temp = ret.intval; | |
13151631 AM |
2280 | break; |
2281 | default: | |
2282 | break; | |
2283 | } | |
2284 | break; | |
2285 | default: | |
2286 | break; | |
2287 | } | |
2288 | } | |
2289 | return 0; | |
2290 | } | |
2291 | ||
2292 | /** | |
2293 | * ab8500_fg_init_hw_registers() - Set up FG related registers | |
2294 | * @di: pointer to the ab8500_fg structure | |
2295 | * | |
2296 | * Set up battery OVV, low battery voltage registers | |
2297 | */ | |
2298 | static int ab8500_fg_init_hw_registers(struct ab8500_fg *di) | |
2299 | { | |
2300 | int ret; | |
2301 | ||
2302 | /* Set VBAT OVV threshold */ | |
2303 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
2304 | AB8500_CHARGER, | |
2305 | AB8500_BATT_OVV, | |
2306 | BATT_OVV_TH_4P75, | |
2307 | BATT_OVV_TH_4P75); | |
2308 | if (ret) { | |
2309 | dev_err(di->dev, "failed to set BATT_OVV\n"); | |
2310 | goto out; | |
2311 | } | |
2312 | ||
2313 | /* Enable VBAT OVV detection */ | |
2314 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
2315 | AB8500_CHARGER, | |
2316 | AB8500_BATT_OVV, | |
2317 | BATT_OVV_ENA, | |
2318 | BATT_OVV_ENA); | |
2319 | if (ret) { | |
2320 | dev_err(di->dev, "failed to enable BATT_OVV\n"); | |
2321 | goto out; | |
2322 | } | |
2323 | ||
2324 | /* Low Battery Voltage */ | |
2325 | ret = abx500_set_register_interruptible(di->dev, | |
2326 | AB8500_SYS_CTRL2_BLOCK, | |
2327 | AB8500_LOW_BAT_REG, | |
2328 | ab8500_volt_to_regval( | |
b0284de0 | 2329 | di->bm->fg_params->lowbat_threshold) << 1 | |
13151631 AM |
2330 | LOW_BAT_ENABLE); |
2331 | if (ret) { | |
2332 | dev_err(di->dev, "%s write failed\n", __func__); | |
2333 | goto out; | |
2334 | } | |
2335 | ||
2336 | /* Battery OK threshold */ | |
2337 | ret = ab8500_fg_battok_init_hw_register(di); | |
2338 | if (ret) { | |
2339 | dev_err(di->dev, "BattOk init write failed.\n"); | |
2340 | goto out; | |
2341 | } | |
93ff722e LJ |
2342 | |
2343 | if (((is_ab8505(di->parent) || is_ab9540(di->parent)) && | |
2344 | abx500_get_chip_id(di->dev) >= AB8500_CUT2P0) | |
2345 | || is_ab8540(di->parent)) { | |
2346 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2347 | AB8505_RTC_PCUT_MAX_TIME_REG, di->bm->fg_params->pcut_max_time); | |
2348 | ||
2349 | if (ret) { | |
2350 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_MAX_TIME_REG\n", __func__); | |
2351 | goto out; | |
2352 | }; | |
2353 | ||
2354 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2355 | AB8505_RTC_PCUT_FLAG_TIME_REG, di->bm->fg_params->pcut_flag_time); | |
2356 | ||
2357 | if (ret) { | |
2358 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_FLAG_TIME_REG\n", __func__); | |
2359 | goto out; | |
2360 | }; | |
2361 | ||
2362 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2363 | AB8505_RTC_PCUT_RESTART_REG, di->bm->fg_params->pcut_max_restart); | |
2364 | ||
2365 | if (ret) { | |
2366 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_RESTART_REG\n", __func__); | |
2367 | goto out; | |
2368 | }; | |
2369 | ||
2370 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2371 | AB8505_RTC_PCUT_DEBOUNCE_REG, di->bm->fg_params->pcut_debounce_time); | |
2372 | ||
2373 | if (ret) { | |
2374 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_DEBOUNCE_REG\n", __func__); | |
2375 | goto out; | |
2376 | }; | |
2377 | ||
2378 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2379 | AB8505_RTC_PCUT_CTL_STATUS_REG, di->bm->fg_params->pcut_enable); | |
2380 | ||
2381 | if (ret) { | |
2382 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_CTL_STATUS_REG\n", __func__); | |
2383 | goto out; | |
2384 | }; | |
2385 | } | |
13151631 AM |
2386 | out: |
2387 | return ret; | |
2388 | } | |
2389 | ||
2390 | /** | |
2391 | * ab8500_fg_external_power_changed() - callback for power supply changes | |
2392 | * @psy: pointer to the structure power_supply | |
2393 | * | |
2394 | * This function is the entry point of the pointer external_power_changed | |
2395 | * of the structure power_supply. | |
2396 | * This function gets executed when there is a change in any external power | |
2397 | * supply that this driver needs to be notified of. | |
2398 | */ | |
2399 | static void ab8500_fg_external_power_changed(struct power_supply *psy) | |
2400 | { | |
2401 | struct ab8500_fg *di = to_ab8500_fg_device_info(psy); | |
2402 | ||
2403 | class_for_each_device(power_supply_class, NULL, | |
2404 | &di->fg_psy, ab8500_fg_get_ext_psy_data); | |
2405 | } | |
2406 | ||
2407 | /** | |
2408 | * abab8500_fg_reinit_work() - work to reset the FG algorithm | |
2409 | * @work: pointer to the work_struct structure | |
2410 | * | |
2411 | * Used to reset the current battery capacity to be able to | |
2412 | * retrigger a new voltage base capacity calculation. For | |
2413 | * test and verification purpose. | |
2414 | */ | |
2415 | static void ab8500_fg_reinit_work(struct work_struct *work) | |
2416 | { | |
2417 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, | |
2418 | fg_reinit_work.work); | |
2419 | ||
2420 | if (di->flags.calibrate == false) { | |
2421 | dev_dbg(di->dev, "Resetting FG state machine to init.\n"); | |
2422 | ab8500_fg_clear_cap_samples(di); | |
2423 | ab8500_fg_calc_cap_discharge_voltage(di, true); | |
2424 | ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT); | |
2425 | ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_INIT); | |
2426 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
2427 | ||
2428 | } else { | |
2429 | dev_err(di->dev, "Residual offset calibration ongoing " | |
2430 | "retrying..\n"); | |
2431 | /* Wait one second until next try*/ | |
2432 | queue_delayed_work(di->fg_wq, &di->fg_reinit_work, | |
2433 | round_jiffies(1)); | |
2434 | } | |
2435 | } | |
2436 | ||
2437 | /** | |
2438 | * ab8500_fg_reinit() - forces FG algorithm to reinitialize with current values | |
2439 | * | |
2440 | * This function can be used to force the FG algorithm to recalculate a new | |
2441 | * voltage based battery capacity. | |
2442 | */ | |
2443 | void ab8500_fg_reinit(void) | |
2444 | { | |
2445 | struct ab8500_fg *di = ab8500_fg_get(); | |
2446 | /* User won't be notified if a null pointer returned. */ | |
2447 | if (di != NULL) | |
2448 | queue_delayed_work(di->fg_wq, &di->fg_reinit_work, 0); | |
2449 | } | |
2450 | ||
2451 | /* Exposure to the sysfs interface */ | |
2452 | ||
2453 | struct ab8500_fg_sysfs_entry { | |
2454 | struct attribute attr; | |
2455 | ssize_t (*show)(struct ab8500_fg *, char *); | |
2456 | ssize_t (*store)(struct ab8500_fg *, const char *, size_t); | |
2457 | }; | |
2458 | ||
2459 | static ssize_t charge_full_show(struct ab8500_fg *di, char *buf) | |
2460 | { | |
2461 | return sprintf(buf, "%d\n", di->bat_cap.max_mah); | |
2462 | } | |
2463 | ||
2464 | static ssize_t charge_full_store(struct ab8500_fg *di, const char *buf, | |
2465 | size_t count) | |
2466 | { | |
2467 | unsigned long charge_full; | |
4b43eb67 | 2468 | ssize_t ret; |
13151631 | 2469 | |
4b43eb67 | 2470 | ret = kstrtoul(buf, 10, &charge_full); |
13151631 | 2471 | |
5ae2b822 | 2472 | dev_dbg(di->dev, "Ret %zd charge_full %lu", ret, charge_full); |
13151631 AM |
2473 | |
2474 | if (!ret) { | |
2475 | di->bat_cap.max_mah = (int) charge_full; | |
2476 | ret = count; | |
2477 | } | |
2478 | return ret; | |
2479 | } | |
2480 | ||
2481 | static ssize_t charge_now_show(struct ab8500_fg *di, char *buf) | |
2482 | { | |
2483 | return sprintf(buf, "%d\n", di->bat_cap.prev_mah); | |
2484 | } | |
2485 | ||
2486 | static ssize_t charge_now_store(struct ab8500_fg *di, const char *buf, | |
2487 | size_t count) | |
2488 | { | |
2489 | unsigned long charge_now; | |
2490 | ssize_t ret; | |
2491 | ||
4b43eb67 | 2492 | ret = kstrtoul(buf, 10, &charge_now); |
13151631 | 2493 | |
5ae2b822 | 2494 | dev_dbg(di->dev, "Ret %zd charge_now %lu was %d", |
13151631 AM |
2495 | ret, charge_now, di->bat_cap.prev_mah); |
2496 | ||
2497 | if (!ret) { | |
2498 | di->bat_cap.user_mah = (int) charge_now; | |
2499 | di->flags.user_cap = true; | |
2500 | ret = count; | |
2501 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
2502 | } | |
2503 | return ret; | |
2504 | } | |
2505 | ||
2506 | static struct ab8500_fg_sysfs_entry charge_full_attr = | |
2507 | __ATTR(charge_full, 0644, charge_full_show, charge_full_store); | |
2508 | ||
2509 | static struct ab8500_fg_sysfs_entry charge_now_attr = | |
2510 | __ATTR(charge_now, 0644, charge_now_show, charge_now_store); | |
2511 | ||
2512 | static ssize_t | |
2513 | ab8500_fg_show(struct kobject *kobj, struct attribute *attr, char *buf) | |
2514 | { | |
2515 | struct ab8500_fg_sysfs_entry *entry; | |
2516 | struct ab8500_fg *di; | |
2517 | ||
2518 | entry = container_of(attr, struct ab8500_fg_sysfs_entry, attr); | |
2519 | di = container_of(kobj, struct ab8500_fg, fg_kobject); | |
2520 | ||
2521 | if (!entry->show) | |
2522 | return -EIO; | |
2523 | ||
2524 | return entry->show(di, buf); | |
2525 | } | |
2526 | static ssize_t | |
2527 | ab8500_fg_store(struct kobject *kobj, struct attribute *attr, const char *buf, | |
2528 | size_t count) | |
2529 | { | |
2530 | struct ab8500_fg_sysfs_entry *entry; | |
2531 | struct ab8500_fg *di; | |
2532 | ||
2533 | entry = container_of(attr, struct ab8500_fg_sysfs_entry, attr); | |
2534 | di = container_of(kobj, struct ab8500_fg, fg_kobject); | |
2535 | ||
2536 | if (!entry->store) | |
2537 | return -EIO; | |
2538 | ||
2539 | return entry->store(di, buf, count); | |
2540 | } | |
2541 | ||
64eb9b02 | 2542 | static const struct sysfs_ops ab8500_fg_sysfs_ops = { |
13151631 AM |
2543 | .show = ab8500_fg_show, |
2544 | .store = ab8500_fg_store, | |
2545 | }; | |
2546 | ||
2547 | static struct attribute *ab8500_fg_attrs[] = { | |
2548 | &charge_full_attr.attr, | |
2549 | &charge_now_attr.attr, | |
2550 | NULL, | |
2551 | }; | |
2552 | ||
2553 | static struct kobj_type ab8500_fg_ktype = { | |
2554 | .sysfs_ops = &ab8500_fg_sysfs_ops, | |
2555 | .default_attrs = ab8500_fg_attrs, | |
2556 | }; | |
2557 | ||
2558 | /** | |
2559 | * ab8500_chargalg_sysfs_exit() - de-init of sysfs entry | |
2560 | * @di: pointer to the struct ab8500_chargalg | |
2561 | * | |
2562 | * This function removes the entry in sysfs. | |
2563 | */ | |
2564 | static void ab8500_fg_sysfs_exit(struct ab8500_fg *di) | |
2565 | { | |
2566 | kobject_del(&di->fg_kobject); | |
2567 | } | |
2568 | ||
2569 | /** | |
2570 | * ab8500_chargalg_sysfs_init() - init of sysfs entry | |
2571 | * @di: pointer to the struct ab8500_chargalg | |
2572 | * | |
2573 | * This function adds an entry in sysfs. | |
2574 | * Returns error code in case of failure else 0(on success) | |
2575 | */ | |
2576 | static int ab8500_fg_sysfs_init(struct ab8500_fg *di) | |
2577 | { | |
2578 | int ret = 0; | |
2579 | ||
2580 | ret = kobject_init_and_add(&di->fg_kobject, | |
2581 | &ab8500_fg_ktype, | |
2582 | NULL, "battery"); | |
2583 | if (ret < 0) | |
2584 | dev_err(di->dev, "failed to create sysfs entry\n"); | |
2585 | ||
2586 | return ret; | |
2587 | } | |
93ff722e LJ |
2588 | |
2589 | static ssize_t ab8505_powercut_flagtime_read(struct device *dev, | |
2590 | struct device_attribute *attr, | |
2591 | char *buf) | |
2592 | { | |
2593 | int ret; | |
2594 | u8 reg_value; | |
2595 | struct power_supply *psy = dev_get_drvdata(dev); | |
2596 | struct ab8500_fg *di; | |
2597 | ||
2598 | di = to_ab8500_fg_device_info(psy); | |
2599 | ||
2600 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2601 | AB8505_RTC_PCUT_FLAG_TIME_REG, ®_value); | |
2602 | ||
2603 | if (ret < 0) { | |
2604 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_FLAG_TIME_REG\n"); | |
2605 | goto fail; | |
2606 | } | |
2607 | ||
2608 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F)); | |
2609 | ||
2610 | fail: | |
2611 | return ret; | |
2612 | } | |
2613 | ||
2614 | static ssize_t ab8505_powercut_flagtime_write(struct device *dev, | |
2615 | struct device_attribute *attr, | |
2616 | const char *buf, size_t count) | |
2617 | { | |
2618 | int ret; | |
2619 | long unsigned reg_value; | |
2620 | struct power_supply *psy = dev_get_drvdata(dev); | |
2621 | struct ab8500_fg *di; | |
2622 | ||
2623 | di = to_ab8500_fg_device_info(psy); | |
2624 | ||
2625 | reg_value = simple_strtoul(buf, NULL, 10); | |
2626 | ||
2627 | if (reg_value > 0x7F) { | |
2628 | dev_err(dev, "Incorrect parameter, echo 0 (1.98s) - 127 (15.625ms) for flagtime\n"); | |
2629 | goto fail; | |
2630 | } | |
2631 | ||
2632 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2633 | AB8505_RTC_PCUT_FLAG_TIME_REG, (u8)reg_value); | |
2634 | ||
2635 | if (ret < 0) | |
2636 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_FLAG_TIME_REG\n"); | |
2637 | ||
2638 | fail: | |
2639 | return count; | |
2640 | } | |
2641 | ||
2642 | static ssize_t ab8505_powercut_maxtime_read(struct device *dev, | |
2643 | struct device_attribute *attr, | |
2644 | char *buf) | |
2645 | { | |
2646 | int ret; | |
2647 | u8 reg_value; | |
2648 | struct power_supply *psy = dev_get_drvdata(dev); | |
2649 | struct ab8500_fg *di; | |
2650 | ||
2651 | di = to_ab8500_fg_device_info(psy); | |
2652 | ||
2653 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2654 | AB8505_RTC_PCUT_MAX_TIME_REG, ®_value); | |
2655 | ||
2656 | if (ret < 0) { | |
2657 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_MAX_TIME_REG\n"); | |
2658 | goto fail; | |
2659 | } | |
2660 | ||
2661 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F)); | |
2662 | ||
2663 | fail: | |
2664 | return ret; | |
2665 | ||
2666 | } | |
2667 | ||
2668 | static ssize_t ab8505_powercut_maxtime_write(struct device *dev, | |
2669 | struct device_attribute *attr, | |
2670 | const char *buf, size_t count) | |
2671 | { | |
2672 | int ret; | |
2673 | int reg_value; | |
2674 | struct power_supply *psy = dev_get_drvdata(dev); | |
2675 | struct ab8500_fg *di; | |
2676 | ||
2677 | di = to_ab8500_fg_device_info(psy); | |
2678 | ||
2679 | reg_value = simple_strtoul(buf, NULL, 10); | |
2680 | if (reg_value > 0x7F) { | |
2681 | dev_err(dev, "Incorrect parameter, echo 0 (0.0s) - 127 (1.98s) for maxtime\n"); | |
2682 | goto fail; | |
2683 | } | |
2684 | ||
2685 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2686 | AB8505_RTC_PCUT_MAX_TIME_REG, (u8)reg_value); | |
2687 | ||
2688 | if (ret < 0) | |
2689 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_MAX_TIME_REG\n"); | |
2690 | ||
2691 | fail: | |
2692 | return count; | |
2693 | } | |
2694 | ||
2695 | static ssize_t ab8505_powercut_restart_read(struct device *dev, | |
2696 | struct device_attribute *attr, | |
2697 | char *buf) | |
2698 | { | |
2699 | int ret; | |
2700 | u8 reg_value; | |
2701 | struct power_supply *psy = dev_get_drvdata(dev); | |
2702 | struct ab8500_fg *di; | |
2703 | ||
2704 | di = to_ab8500_fg_device_info(psy); | |
2705 | ||
2706 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2707 | AB8505_RTC_PCUT_RESTART_REG, ®_value); | |
2708 | ||
2709 | if (ret < 0) { | |
2710 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_RESTART_REG\n"); | |
2711 | goto fail; | |
2712 | } | |
2713 | ||
2714 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0xF)); | |
2715 | ||
2716 | fail: | |
2717 | return ret; | |
2718 | } | |
2719 | ||
2720 | static ssize_t ab8505_powercut_restart_write(struct device *dev, | |
2721 | struct device_attribute *attr, | |
2722 | const char *buf, size_t count) | |
2723 | { | |
2724 | int ret; | |
2725 | int reg_value; | |
2726 | struct power_supply *psy = dev_get_drvdata(dev); | |
2727 | struct ab8500_fg *di; | |
2728 | ||
2729 | di = to_ab8500_fg_device_info(psy); | |
2730 | ||
2731 | reg_value = simple_strtoul(buf, NULL, 10); | |
2732 | if (reg_value > 0xF) { | |
2733 | dev_err(dev, "Incorrect parameter, echo 0 - 15 for number of restart\n"); | |
2734 | goto fail; | |
2735 | } | |
2736 | ||
2737 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2738 | AB8505_RTC_PCUT_RESTART_REG, (u8)reg_value); | |
2739 | ||
2740 | if (ret < 0) | |
2741 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_RESTART_REG\n"); | |
2742 | ||
2743 | fail: | |
2744 | return count; | |
2745 | ||
2746 | } | |
2747 | ||
2748 | static ssize_t ab8505_powercut_timer_read(struct device *dev, | |
2749 | struct device_attribute *attr, | |
2750 | char *buf) | |
2751 | { | |
2752 | int ret; | |
2753 | u8 reg_value; | |
2754 | struct power_supply *psy = dev_get_drvdata(dev); | |
2755 | struct ab8500_fg *di; | |
2756 | ||
2757 | di = to_ab8500_fg_device_info(psy); | |
2758 | ||
2759 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2760 | AB8505_RTC_PCUT_TIME_REG, ®_value); | |
2761 | ||
2762 | if (ret < 0) { | |
2763 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_TIME_REG\n"); | |
2764 | goto fail; | |
2765 | } | |
2766 | ||
2767 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F)); | |
2768 | ||
2769 | fail: | |
2770 | return ret; | |
2771 | } | |
2772 | ||
2773 | static ssize_t ab8505_powercut_restart_counter_read(struct device *dev, | |
2774 | struct device_attribute *attr, | |
2775 | char *buf) | |
2776 | { | |
2777 | int ret; | |
2778 | u8 reg_value; | |
2779 | struct power_supply *psy = dev_get_drvdata(dev); | |
2780 | struct ab8500_fg *di; | |
2781 | ||
2782 | di = to_ab8500_fg_device_info(psy); | |
2783 | ||
2784 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2785 | AB8505_RTC_PCUT_RESTART_REG, ®_value); | |
2786 | ||
2787 | if (ret < 0) { | |
2788 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_RESTART_REG\n"); | |
2789 | goto fail; | |
2790 | } | |
2791 | ||
2792 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0xF0) >> 4); | |
2793 | ||
2794 | fail: | |
2795 | return ret; | |
2796 | } | |
2797 | ||
2798 | static ssize_t ab8505_powercut_read(struct device *dev, | |
2799 | struct device_attribute *attr, | |
2800 | char *buf) | |
2801 | { | |
2802 | int ret; | |
2803 | u8 reg_value; | |
2804 | struct power_supply *psy = dev_get_drvdata(dev); | |
2805 | struct ab8500_fg *di; | |
2806 | ||
2807 | di = to_ab8500_fg_device_info(psy); | |
2808 | ||
2809 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2810 | AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value); | |
2811 | ||
2812 | if (ret < 0) | |
2813 | goto fail; | |
2814 | ||
2815 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x1)); | |
2816 | ||
2817 | fail: | |
2818 | return ret; | |
2819 | } | |
2820 | ||
2821 | static ssize_t ab8505_powercut_write(struct device *dev, | |
2822 | struct device_attribute *attr, | |
2823 | const char *buf, size_t count) | |
2824 | { | |
2825 | int ret; | |
2826 | int reg_value; | |
2827 | struct power_supply *psy = dev_get_drvdata(dev); | |
2828 | struct ab8500_fg *di; | |
2829 | ||
2830 | di = to_ab8500_fg_device_info(psy); | |
2831 | ||
2832 | reg_value = simple_strtoul(buf, NULL, 10); | |
2833 | if (reg_value > 0x1) { | |
2834 | dev_err(dev, "Incorrect parameter, echo 0/1 to disable/enable Pcut feature\n"); | |
2835 | goto fail; | |
2836 | } | |
2837 | ||
2838 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2839 | AB8505_RTC_PCUT_CTL_STATUS_REG, (u8)reg_value); | |
2840 | ||
2841 | if (ret < 0) | |
2842 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_CTL_STATUS_REG\n"); | |
2843 | ||
2844 | fail: | |
2845 | return count; | |
2846 | } | |
2847 | ||
2848 | static ssize_t ab8505_powercut_flag_read(struct device *dev, | |
2849 | struct device_attribute *attr, | |
2850 | char *buf) | |
2851 | { | |
2852 | ||
2853 | int ret; | |
2854 | u8 reg_value; | |
2855 | struct power_supply *psy = dev_get_drvdata(dev); | |
2856 | struct ab8500_fg *di; | |
2857 | ||
2858 | di = to_ab8500_fg_device_info(psy); | |
2859 | ||
2860 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2861 | AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value); | |
2862 | ||
2863 | if (ret < 0) { | |
2864 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_CTL_STATUS_REG\n"); | |
2865 | goto fail; | |
2866 | } | |
2867 | ||
2868 | return scnprintf(buf, PAGE_SIZE, "%d\n", ((reg_value & 0x10) >> 4)); | |
2869 | ||
2870 | fail: | |
2871 | return ret; | |
2872 | } | |
2873 | ||
2874 | static ssize_t ab8505_powercut_debounce_read(struct device *dev, | |
2875 | struct device_attribute *attr, | |
2876 | char *buf) | |
2877 | { | |
2878 | int ret; | |
2879 | u8 reg_value; | |
2880 | struct power_supply *psy = dev_get_drvdata(dev); | |
2881 | struct ab8500_fg *di; | |
2882 | ||
2883 | di = to_ab8500_fg_device_info(psy); | |
2884 | ||
2885 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2886 | AB8505_RTC_PCUT_DEBOUNCE_REG, ®_value); | |
2887 | ||
2888 | if (ret < 0) { | |
2889 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_DEBOUNCE_REG\n"); | |
2890 | goto fail; | |
2891 | } | |
2892 | ||
2893 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7)); | |
2894 | ||
2895 | fail: | |
2896 | return ret; | |
2897 | } | |
2898 | ||
2899 | static ssize_t ab8505_powercut_debounce_write(struct device *dev, | |
2900 | struct device_attribute *attr, | |
2901 | const char *buf, size_t count) | |
2902 | { | |
2903 | int ret; | |
2904 | int reg_value; | |
2905 | struct power_supply *psy = dev_get_drvdata(dev); | |
2906 | struct ab8500_fg *di; | |
2907 | ||
2908 | di = to_ab8500_fg_device_info(psy); | |
2909 | ||
2910 | reg_value = simple_strtoul(buf, NULL, 10); | |
2911 | if (reg_value > 0x7) { | |
2912 | dev_err(dev, "Incorrect parameter, echo 0 to 7 for debounce setting\n"); | |
2913 | goto fail; | |
2914 | } | |
2915 | ||
2916 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2917 | AB8505_RTC_PCUT_DEBOUNCE_REG, (u8)reg_value); | |
2918 | ||
2919 | if (ret < 0) | |
2920 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_DEBOUNCE_REG\n"); | |
2921 | ||
2922 | fail: | |
2923 | return count; | |
2924 | } | |
2925 | ||
2926 | static ssize_t ab8505_powercut_enable_status_read(struct device *dev, | |
2927 | struct device_attribute *attr, | |
2928 | char *buf) | |
2929 | { | |
2930 | int ret; | |
2931 | u8 reg_value; | |
2932 | struct power_supply *psy = dev_get_drvdata(dev); | |
2933 | struct ab8500_fg *di; | |
2934 | ||
2935 | di = to_ab8500_fg_device_info(psy); | |
2936 | ||
2937 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2938 | AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value); | |
2939 | ||
2940 | if (ret < 0) { | |
2941 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_CTL_STATUS_REG\n"); | |
2942 | goto fail; | |
2943 | } | |
2944 | ||
2945 | return scnprintf(buf, PAGE_SIZE, "%d\n", ((reg_value & 0x20) >> 5)); | |
2946 | ||
2947 | fail: | |
2948 | return ret; | |
2949 | } | |
2950 | ||
2951 | static struct device_attribute ab8505_fg_sysfs_psy_attrs[] = { | |
2952 | __ATTR(powercut_flagtime, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2953 | ab8505_powercut_flagtime_read, ab8505_powercut_flagtime_write), | |
2954 | __ATTR(powercut_maxtime, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2955 | ab8505_powercut_maxtime_read, ab8505_powercut_maxtime_write), | |
2956 | __ATTR(powercut_restart_max, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2957 | ab8505_powercut_restart_read, ab8505_powercut_restart_write), | |
2958 | __ATTR(powercut_timer, S_IRUGO, ab8505_powercut_timer_read, NULL), | |
2959 | __ATTR(powercut_restart_counter, S_IRUGO, | |
2960 | ab8505_powercut_restart_counter_read, NULL), | |
2961 | __ATTR(powercut_enable, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2962 | ab8505_powercut_read, ab8505_powercut_write), | |
2963 | __ATTR(powercut_flag, S_IRUGO, ab8505_powercut_flag_read, NULL), | |
2964 | __ATTR(powercut_debounce_time, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2965 | ab8505_powercut_debounce_read, ab8505_powercut_debounce_write), | |
2966 | __ATTR(powercut_enable_status, S_IRUGO, | |
2967 | ab8505_powercut_enable_status_read, NULL), | |
2968 | }; | |
2969 | ||
2970 | static int ab8500_fg_sysfs_psy_create_attrs(struct device *dev) | |
2971 | { | |
2972 | unsigned int i, j; | |
2973 | struct power_supply *psy = dev_get_drvdata(dev); | |
2974 | struct ab8500_fg *di; | |
2975 | ||
2976 | di = to_ab8500_fg_device_info(psy); | |
2977 | ||
2978 | if (((is_ab8505(di->parent) || is_ab9540(di->parent)) && | |
2979 | abx500_get_chip_id(dev->parent) >= AB8500_CUT2P0) | |
2980 | || is_ab8540(di->parent)) { | |
2981 | for (j = 0; j < ARRAY_SIZE(ab8505_fg_sysfs_psy_attrs); j++) | |
2982 | if (device_create_file(dev, &ab8505_fg_sysfs_psy_attrs[j])) | |
2983 | goto sysfs_psy_create_attrs_failed_ab8505; | |
2984 | } | |
2985 | return 0; | |
2986 | sysfs_psy_create_attrs_failed_ab8505: | |
2987 | dev_err(dev, "Failed creating sysfs psy attrs for ab8505.\n"); | |
2988 | while (j--) | |
2989 | device_remove_file(dev, &ab8505_fg_sysfs_psy_attrs[i]); | |
2990 | ||
2991 | return -EIO; | |
2992 | } | |
2993 | ||
2994 | static void ab8500_fg_sysfs_psy_remove_attrs(struct device *dev) | |
2995 | { | |
2996 | unsigned int i; | |
2997 | struct power_supply *psy = dev_get_drvdata(dev); | |
2998 | struct ab8500_fg *di; | |
2999 | ||
3000 | di = to_ab8500_fg_device_info(psy); | |
3001 | ||
3002 | if (((is_ab8505(di->parent) || is_ab9540(di->parent)) && | |
3003 | abx500_get_chip_id(dev->parent) >= AB8500_CUT2P0) | |
3004 | || is_ab8540(di->parent)) { | |
3005 | for (i = 0; i < ARRAY_SIZE(ab8505_fg_sysfs_psy_attrs); i++) | |
3006 | (void)device_remove_file(dev, &ab8505_fg_sysfs_psy_attrs[i]); | |
3007 | } | |
3008 | } | |
3009 | ||
13151631 AM |
3010 | /* Exposure to the sysfs interface <<END>> */ |
3011 | ||
3012 | #if defined(CONFIG_PM) | |
3013 | static int ab8500_fg_resume(struct platform_device *pdev) | |
3014 | { | |
3015 | struct ab8500_fg *di = platform_get_drvdata(pdev); | |
3016 | ||
3017 | /* | |
3018 | * Change state if we're not charging. If we're charging we will wake | |
3019 | * up on the FG IRQ | |
3020 | */ | |
3021 | if (!di->flags.charging) { | |
3022 | ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_WAKEUP); | |
3023 | queue_work(di->fg_wq, &di->fg_work); | |
3024 | } | |
3025 | ||
3026 | return 0; | |
3027 | } | |
3028 | ||
3029 | static int ab8500_fg_suspend(struct platform_device *pdev, | |
3030 | pm_message_t state) | |
3031 | { | |
3032 | struct ab8500_fg *di = platform_get_drvdata(pdev); | |
3033 | ||
3034 | flush_delayed_work(&di->fg_periodic_work); | |
53ef1f59 JA |
3035 | flush_work(&di->fg_work); |
3036 | flush_work(&di->fg_acc_cur_work); | |
3037 | flush_delayed_work(&di->fg_reinit_work); | |
3038 | flush_delayed_work(&di->fg_low_bat_work); | |
3039 | flush_delayed_work(&di->fg_check_hw_failure_work); | |
13151631 AM |
3040 | |
3041 | /* | |
3042 | * If the FG is enabled we will disable it before going to suspend | |
3043 | * only if we're not charging | |
3044 | */ | |
3045 | if (di->flags.fg_enabled && !di->flags.charging) | |
3046 | ab8500_fg_coulomb_counter(di, false); | |
3047 | ||
3048 | return 0; | |
3049 | } | |
3050 | #else | |
3051 | #define ab8500_fg_suspend NULL | |
3052 | #define ab8500_fg_resume NULL | |
3053 | #endif | |
3054 | ||
415ec69f | 3055 | static int ab8500_fg_remove(struct platform_device *pdev) |
13151631 AM |
3056 | { |
3057 | int ret = 0; | |
3058 | struct ab8500_fg *di = platform_get_drvdata(pdev); | |
3059 | ||
3060 | list_del(&di->node); | |
3061 | ||
3062 | /* Disable coulomb counter */ | |
3063 | ret = ab8500_fg_coulomb_counter(di, false); | |
3064 | if (ret) | |
3065 | dev_err(di->dev, "failed to disable coulomb counter\n"); | |
3066 | ||
3067 | destroy_workqueue(di->fg_wq); | |
3068 | ab8500_fg_sysfs_exit(di); | |
3069 | ||
3070 | flush_scheduled_work(); | |
93ff722e | 3071 | ab8500_fg_sysfs_psy_remove_attrs(di->fg_psy.dev); |
13151631 | 3072 | power_supply_unregister(&di->fg_psy); |
13151631 AM |
3073 | return ret; |
3074 | } | |
3075 | ||
3076 | /* ab8500 fg driver interrupts and their respective isr */ | |
3077 | static struct ab8500_fg_interrupts ab8500_fg_irq[] = { | |
3078 | {"NCONV_ACCU", ab8500_fg_cc_convend_handler}, | |
3079 | {"BATT_OVV", ab8500_fg_batt_ovv_handler}, | |
3080 | {"LOW_BAT_F", ab8500_fg_lowbatf_handler}, | |
3081 | {"CC_INT_CALIB", ab8500_fg_cc_int_calib_handler}, | |
3082 | {"CCEOC", ab8500_fg_cc_data_end_handler}, | |
3083 | }; | |
3084 | ||
e0f1abeb R |
3085 | static char *supply_interface[] = { |
3086 | "ab8500_chargalg", | |
3087 | "ab8500_usb", | |
3088 | }; | |
3089 | ||
c8afa640 | 3090 | static int ab8500_fg_probe(struct platform_device *pdev) |
13151631 | 3091 | { |
e0f1abeb | 3092 | struct device_node *np = pdev->dev.of_node; |
195c1c66 | 3093 | struct abx500_bm_data *plat = pdev->dev.platform_data; |
e0f1abeb | 3094 | struct ab8500_fg *di; |
13151631 AM |
3095 | int i, irq; |
3096 | int ret = 0; | |
13151631 | 3097 | |
e0f1abeb R |
3098 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
3099 | if (!di) { | |
3100 | dev_err(&pdev->dev, "%s no mem for ab8500_fg\n", __func__); | |
13151631 | 3101 | return -ENOMEM; |
e0f1abeb | 3102 | } |
195c1c66 LJ |
3103 | |
3104 | if (!plat) { | |
3105 | dev_err(&pdev->dev, "no battery management data supplied\n"); | |
3106 | return -EINVAL; | |
3107 | } | |
3108 | di->bm = plat; | |
3109 | ||
3110 | if (np) { | |
3111 | ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm); | |
3112 | if (ret) { | |
3113 | dev_err(&pdev->dev, "failed to get battery information\n"); | |
3114 | return ret; | |
e0f1abeb | 3115 | } |
e0f1abeb | 3116 | } |
13151631 AM |
3117 | |
3118 | mutex_init(&di->cc_lock); | |
3119 | ||
3120 | /* get parent data */ | |
3121 | di->dev = &pdev->dev; | |
3122 | di->parent = dev_get_drvdata(pdev->dev.parent); | |
3123 | di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0"); | |
3124 | ||
13151631 AM |
3125 | di->fg_psy.name = "ab8500_fg"; |
3126 | di->fg_psy.type = POWER_SUPPLY_TYPE_BATTERY; | |
3127 | di->fg_psy.properties = ab8500_fg_props; | |
3128 | di->fg_psy.num_properties = ARRAY_SIZE(ab8500_fg_props); | |
3129 | di->fg_psy.get_property = ab8500_fg_get_property; | |
e0f1abeb R |
3130 | di->fg_psy.supplied_to = supply_interface; |
3131 | di->fg_psy.num_supplicants = ARRAY_SIZE(supply_interface), | |
13151631 AM |
3132 | di->fg_psy.external_power_changed = ab8500_fg_external_power_changed; |
3133 | ||
3134 | di->bat_cap.max_mah_design = MILLI_TO_MICRO * | |
b0284de0 | 3135 | di->bm->bat_type[di->bm->batt_id].charge_full_design; |
13151631 AM |
3136 | |
3137 | di->bat_cap.max_mah = di->bat_cap.max_mah_design; | |
3138 | ||
b0284de0 | 3139 | di->vbat_nom = di->bm->bat_type[di->bm->batt_id].nominal_voltage; |
13151631 AM |
3140 | |
3141 | di->init_capacity = true; | |
3142 | ||
3143 | ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT); | |
3144 | ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_INIT); | |
3145 | ||
3146 | /* Create a work queue for running the FG algorithm */ | |
3147 | di->fg_wq = create_singlethread_workqueue("ab8500_fg_wq"); | |
3148 | if (di->fg_wq == NULL) { | |
3149 | dev_err(di->dev, "failed to create work queue\n"); | |
e0f1abeb | 3150 | return -ENOMEM; |
13151631 AM |
3151 | } |
3152 | ||
3153 | /* Init work for running the fg algorithm instantly */ | |
3154 | INIT_WORK(&di->fg_work, ab8500_fg_instant_work); | |
3155 | ||
3156 | /* Init work for getting the battery accumulated current */ | |
3157 | INIT_WORK(&di->fg_acc_cur_work, ab8500_fg_acc_cur_work); | |
3158 | ||
3159 | /* Init work for reinitialising the fg algorithm */ | |
203b42f7 | 3160 | INIT_DEFERRABLE_WORK(&di->fg_reinit_work, |
13151631 AM |
3161 | ab8500_fg_reinit_work); |
3162 | ||
3163 | /* Work delayed Queue to run the state machine */ | |
203b42f7 | 3164 | INIT_DEFERRABLE_WORK(&di->fg_periodic_work, |
13151631 AM |
3165 | ab8500_fg_periodic_work); |
3166 | ||
3167 | /* Work to check low battery condition */ | |
203b42f7 | 3168 | INIT_DEFERRABLE_WORK(&di->fg_low_bat_work, |
13151631 AM |
3169 | ab8500_fg_low_bat_work); |
3170 | ||
3171 | /* Init work for HW failure check */ | |
203b42f7 | 3172 | INIT_DEFERRABLE_WORK(&di->fg_check_hw_failure_work, |
13151631 AM |
3173 | ab8500_fg_check_hw_failure_work); |
3174 | ||
75f2a219 HB |
3175 | /* Reset battery low voltage flag */ |
3176 | di->flags.low_bat = false; | |
3177 | ||
3178 | /* Initialize low battery counter */ | |
3179 | di->low_bat_cnt = 10; | |
3180 | ||
13151631 AM |
3181 | /* Initialize OVV, and other registers */ |
3182 | ret = ab8500_fg_init_hw_registers(di); | |
3183 | if (ret) { | |
3184 | dev_err(di->dev, "failed to initialize registers\n"); | |
3185 | goto free_inst_curr_wq; | |
3186 | } | |
3187 | ||
3188 | /* Consider battery unknown until we're informed otherwise */ | |
3189 | di->flags.batt_unknown = true; | |
3190 | di->flags.batt_id_received = false; | |
3191 | ||
3192 | /* Register FG power supply class */ | |
3193 | ret = power_supply_register(di->dev, &di->fg_psy); | |
3194 | if (ret) { | |
3195 | dev_err(di->dev, "failed to register FG psy\n"); | |
3196 | goto free_inst_curr_wq; | |
3197 | } | |
3198 | ||
b0284de0 | 3199 | di->fg_samples = SEC_TO_SAMPLE(di->bm->fg_params->init_timer); |
13151631 AM |
3200 | ab8500_fg_coulomb_counter(di, true); |
3201 | ||
3988a4df JB |
3202 | /* |
3203 | * Initialize completion used to notify completion and start | |
3204 | * of inst current | |
3205 | */ | |
3206 | init_completion(&di->ab8500_fg_started); | |
13151631 AM |
3207 | init_completion(&di->ab8500_fg_complete); |
3208 | ||
3209 | /* Register interrupts */ | |
3210 | for (i = 0; i < ARRAY_SIZE(ab8500_fg_irq); i++) { | |
3211 | irq = platform_get_irq_byname(pdev, ab8500_fg_irq[i].name); | |
3212 | ret = request_threaded_irq(irq, NULL, ab8500_fg_irq[i].isr, | |
3213 | IRQF_SHARED | IRQF_NO_SUSPEND, | |
3214 | ab8500_fg_irq[i].name, di); | |
3215 | ||
3216 | if (ret != 0) { | |
3217 | dev_err(di->dev, "failed to request %s IRQ %d: %d\n" | |
3218 | , ab8500_fg_irq[i].name, irq, ret); | |
3219 | goto free_irq; | |
3220 | } | |
3221 | dev_dbg(di->dev, "Requested %s IRQ %d: %d\n", | |
3222 | ab8500_fg_irq[i].name, irq, ret); | |
3223 | } | |
3224 | di->irq = platform_get_irq_byname(pdev, "CCEOC"); | |
3225 | disable_irq(di->irq); | |
3988a4df | 3226 | di->nbr_cceoc_irq_cnt = 0; |
13151631 AM |
3227 | |
3228 | platform_set_drvdata(pdev, di); | |
3229 | ||
3230 | ret = ab8500_fg_sysfs_init(di); | |
3231 | if (ret) { | |
3232 | dev_err(di->dev, "failed to create sysfs entry\n"); | |
3233 | goto free_irq; | |
3234 | } | |
3235 | ||
93ff722e LJ |
3236 | ret = ab8500_fg_sysfs_psy_create_attrs(di->fg_psy.dev); |
3237 | if (ret) { | |
3238 | dev_err(di->dev, "failed to create FG psy\n"); | |
3239 | ab8500_fg_sysfs_exit(di); | |
3240 | goto free_irq; | |
3241 | } | |
3242 | ||
13151631 AM |
3243 | /* Calibrate the fg first time */ |
3244 | di->flags.calibrate = true; | |
3245 | di->calib_state = AB8500_FG_CALIB_INIT; | |
3246 | ||
3247 | /* Use room temp as default value until we get an update from driver. */ | |
3248 | di->bat_temp = 210; | |
3249 | ||
3250 | /* Run the FG algorithm */ | |
3251 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
3252 | ||
3253 | list_add_tail(&di->node, &ab8500_fg_list); | |
3254 | ||
3255 | return ret; | |
3256 | ||
3257 | free_irq: | |
3258 | power_supply_unregister(&di->fg_psy); | |
3259 | ||
3260 | /* We also have to free all successfully registered irqs */ | |
3261 | for (i = i - 1; i >= 0; i--) { | |
3262 | irq = platform_get_irq_byname(pdev, ab8500_fg_irq[i].name); | |
3263 | free_irq(irq, di); | |
3264 | } | |
3265 | free_inst_curr_wq: | |
3266 | destroy_workqueue(di->fg_wq); | |
13151631 AM |
3267 | return ret; |
3268 | } | |
3269 | ||
e0f1abeb R |
3270 | static const struct of_device_id ab8500_fg_match[] = { |
3271 | { .compatible = "stericsson,ab8500-fg", }, | |
3272 | { }, | |
3273 | }; | |
3274 | ||
13151631 AM |
3275 | static struct platform_driver ab8500_fg_driver = { |
3276 | .probe = ab8500_fg_probe, | |
28ea73f4 | 3277 | .remove = ab8500_fg_remove, |
13151631 AM |
3278 | .suspend = ab8500_fg_suspend, |
3279 | .resume = ab8500_fg_resume, | |
3280 | .driver = { | |
3281 | .name = "ab8500-fg", | |
3282 | .owner = THIS_MODULE, | |
e0f1abeb | 3283 | .of_match_table = ab8500_fg_match, |
13151631 AM |
3284 | }, |
3285 | }; | |
3286 | ||
3287 | static int __init ab8500_fg_init(void) | |
3288 | { | |
3289 | return platform_driver_register(&ab8500_fg_driver); | |
3290 | } | |
3291 | ||
3292 | static void __exit ab8500_fg_exit(void) | |
3293 | { | |
3294 | platform_driver_unregister(&ab8500_fg_driver); | |
3295 | } | |
3296 | ||
3297 | subsys_initcall_sync(ab8500_fg_init); | |
3298 | module_exit(ab8500_fg_exit); | |
3299 | ||
3300 | MODULE_LICENSE("GPL v2"); | |
3301 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski"); | |
3302 | MODULE_ALIAS("platform:ab8500-fg"); | |
3303 | MODULE_DESCRIPTION("AB8500 Fuel Gauge driver"); |