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0376148f | 1 | // SPDX-License-Identifier: GPL-2.0-only |
13151631 AM |
2 | /* |
3 | * Copyright (C) ST-Ericsson AB 2012 | |
4 | * | |
5 | * Main and Back-up battery management driver. | |
6 | * | |
7 | * Note: Backup battery management is required in case of Li-Ion battery and not | |
8 | * for capacitive battery. HREF boards have capacitive battery and hence backup | |
9 | * battery management is not used and the supported code is available in this | |
10 | * driver. | |
11 | * | |
13151631 AM |
12 | * Author: |
13 | * Johan Palsson <johan.palsson@stericsson.com> | |
14 | * Karl Komierowski <karl.komierowski@stericsson.com> | |
15 | * Arun R Murthy <arun.murthy@stericsson.com> | |
16 | */ | |
17 | ||
18 | #include <linux/init.h> | |
19 | #include <linux/module.h> | |
1c1f13a0 | 20 | #include <linux/component.h> |
13151631 AM |
21 | #include <linux/device.h> |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <linux/power_supply.h> | |
25 | #include <linux/kobject.h> | |
13151631 | 26 | #include <linux/slab.h> |
13151631 | 27 | #include <linux/delay.h> |
13151631 | 28 | #include <linux/time.h> |
8000ebf7 | 29 | #include <linux/time64.h> |
e0f1abeb | 30 | #include <linux/of.h> |
13151631 | 31 | #include <linux/completion.h> |
e0f1abeb R |
32 | #include <linux/mfd/core.h> |
33 | #include <linux/mfd/abx500.h> | |
34 | #include <linux/mfd/abx500/ab8500.h> | |
1e82623c | 35 | #include <linux/iio/consumer.h> |
6eaf8740 | 36 | #include <linux/kernel.h> |
f8205474 | 37 | #include <linux/fixp-arith.h> |
13151631 | 38 | |
417c0fc2 LW |
39 | #include "ab8500-bm.h" |
40 | ||
13151631 | 41 | #define FG_LSB_IN_MA 1627 |
0577610e | 42 | #define QLSB_NANO_AMP_HOURS_X10 1071 |
13151631 AM |
43 | #define INS_CURR_TIMEOUT (3 * HZ) |
44 | ||
45 | #define SEC_TO_SAMPLE(S) (S * 4) | |
46 | ||
47 | #define NBR_AVG_SAMPLES 20 | |
edc400e1 | 48 | #define WAIT_FOR_INST_CURRENT_MAX 70 |
965a9904 LW |
49 | /* Currents higher than -500mA (dissipating) will make compensation unstable */ |
50 | #define IGNORE_VBAT_HIGHCUR -500000 | |
13151631 | 51 | |
75f2a219 | 52 | #define LOW_BAT_CHECK_INTERVAL (HZ / 16) /* 62.5 ms */ |
13151631 AM |
53 | |
54 | #define VALID_CAPACITY_SEC (45 * 60) /* 45 minutes */ | |
55 | #define BATT_OK_MIN 2360 /* mV */ | |
56 | #define BATT_OK_INCREMENT 50 /* mV */ | |
57 | #define BATT_OK_MAX_NR_INCREMENTS 0xE | |
58 | ||
59 | /* FG constants */ | |
60 | #define BATT_OVV 0x01 | |
61 | ||
13151631 | 62 | /** |
94233f11 | 63 | * struct ab8500_fg_interrupts - ab8500 fg interrupts |
13151631 AM |
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]; | |
8000ebf7 | 111 | time64_t time_stamps[NBR_AVG_SAMPLES]; |
13151631 AM |
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 | |
0525f34d | 162 | * @vbat_uv: Battery voltage in uV |
2a5f4183 | 163 | * @vbat_nom_uv: Nominal battery voltage in uV |
0525f34d LW |
164 | * @inst_curr_ua: Instantenous battery current in uA |
165 | * @avg_curr_ua: Average battery current in uA | |
13151631 AM |
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 | |
1e82623c | 187 | * @main_bat_v: ADC channel for the main battery voltage |
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; | |
0525f34d | 204 | int vbat_uv; |
2a5f4183 | 205 | int vbat_nom_uv; |
0525f34d LW |
206 | int inst_curr_ua; |
207 | int avg_curr_ua; | |
13151631 AM |
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; |
1ae4a91c | 216 | u32 line_impedance_uohm; |
13151631 AM |
217 | bool recovery_needed; |
218 | bool high_curr_mode; | |
219 | bool init_capacity; | |
220 | bool turn_off_fg; | |
221 | enum ab8500_fg_calibration_state calib_state; | |
222 | enum ab8500_fg_discharge_state discharge_state; | |
223 | enum ab8500_fg_charge_state charge_state; | |
3988a4df | 224 | struct completion ab8500_fg_started; |
13151631 AM |
225 | struct completion ab8500_fg_complete; |
226 | struct ab8500_fg_flags flags; | |
227 | struct ab8500_fg_battery_capacity bat_cap; | |
228 | struct ab8500_fg_avg_cap avg_cap; | |
229 | struct ab8500 *parent; | |
1e82623c | 230 | struct iio_channel *main_bat_v; |
484a9cc3 | 231 | struct ab8500_bm_data *bm; |
297d716f | 232 | struct power_supply *fg_psy; |
13151631 AM |
233 | struct workqueue_struct *fg_wq; |
234 | struct delayed_work fg_periodic_work; | |
235 | struct delayed_work fg_low_bat_work; | |
236 | struct delayed_work fg_reinit_work; | |
237 | struct work_struct fg_work; | |
238 | struct work_struct fg_acc_cur_work; | |
239 | struct delayed_work fg_check_hw_failure_work; | |
240 | struct mutex cc_lock; | |
241 | struct kobject fg_kobject; | |
242 | }; | |
243 | static LIST_HEAD(ab8500_fg_list); | |
244 | ||
245 | /** | |
246 | * ab8500_fg_get() - returns a reference to the primary AB8500 fuel gauge | |
247 | * (i.e. the first fuel gauge in the instance list) | |
248 | */ | |
249 | struct ab8500_fg *ab8500_fg_get(void) | |
250 | { | |
f04f7aef MY |
251 | return list_first_entry_or_null(&ab8500_fg_list, struct ab8500_fg, |
252 | node); | |
13151631 AM |
253 | } |
254 | ||
255 | /* Main battery properties */ | |
256 | static enum power_supply_property ab8500_fg_props[] = { | |
257 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
258 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
259 | POWER_SUPPLY_PROP_CURRENT_AVG, | |
260 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, | |
261 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
262 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
263 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
264 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
265 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
266 | POWER_SUPPLY_PROP_CAPACITY, | |
267 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
268 | }; | |
269 | ||
270 | /* | |
271 | * This array maps the raw hex value to lowbat voltage used by the AB8500 | |
0525f34d | 272 | * Values taken from the UM0836, in microvolts. |
13151631 AM |
273 | */ |
274 | static int ab8500_fg_lowbat_voltage_map[] = { | |
0525f34d LW |
275 | 2300000, |
276 | 2325000, | |
277 | 2350000, | |
278 | 2375000, | |
279 | 2400000, | |
280 | 2425000, | |
281 | 2450000, | |
282 | 2475000, | |
283 | 2500000, | |
284 | 2525000, | |
285 | 2550000, | |
286 | 2575000, | |
287 | 2600000, | |
288 | 2625000, | |
289 | 2650000, | |
290 | 2675000, | |
291 | 2700000, | |
292 | 2725000, | |
293 | 2750000, | |
294 | 2775000, | |
295 | 2800000, | |
296 | 2825000, | |
297 | 2850000, | |
298 | 2875000, | |
299 | 2900000, | |
300 | 2925000, | |
301 | 2950000, | |
302 | 2975000, | |
303 | 3000000, | |
304 | 3025000, | |
305 | 3050000, | |
306 | 3075000, | |
307 | 3100000, | |
308 | 3125000, | |
309 | 3150000, | |
310 | 3175000, | |
311 | 3200000, | |
312 | 3225000, | |
313 | 3250000, | |
314 | 3275000, | |
315 | 3300000, | |
316 | 3325000, | |
317 | 3350000, | |
318 | 3375000, | |
319 | 3400000, | |
320 | 3425000, | |
321 | 3450000, | |
322 | 3475000, | |
323 | 3500000, | |
324 | 3525000, | |
325 | 3550000, | |
326 | 3575000, | |
327 | 3600000, | |
328 | 3625000, | |
329 | 3650000, | |
330 | 3675000, | |
331 | 3700000, | |
332 | 3725000, | |
333 | 3750000, | |
334 | 3775000, | |
335 | 3800000, | |
336 | 3825000, | |
337 | 3850000, | |
338 | 3850000, | |
13151631 AM |
339 | }; |
340 | ||
0525f34d | 341 | static u8 ab8500_volt_to_regval(int voltage_uv) |
13151631 AM |
342 | { |
343 | int i; | |
344 | ||
0525f34d | 345 | if (voltage_uv < ab8500_fg_lowbat_voltage_map[0]) |
13151631 AM |
346 | return 0; |
347 | ||
348 | for (i = 0; i < ARRAY_SIZE(ab8500_fg_lowbat_voltage_map); i++) { | |
0525f34d | 349 | if (voltage_uv < ab8500_fg_lowbat_voltage_map[i]) |
13151631 AM |
350 | return (u8) i - 1; |
351 | } | |
352 | ||
353 | /* If not captured above, return index of last element */ | |
354 | return (u8) ARRAY_SIZE(ab8500_fg_lowbat_voltage_map) - 1; | |
355 | } | |
356 | ||
357 | /** | |
358 | * ab8500_fg_is_low_curr() - Low or high current mode | |
359 | * @di: pointer to the ab8500_fg structure | |
0525f34d | 360 | * @curr_ua: the current to base or our decision on in microampere |
13151631 AM |
361 | * |
362 | * Low current mode if the current consumption is below a certain threshold | |
363 | */ | |
0525f34d | 364 | static int ab8500_fg_is_low_curr(struct ab8500_fg *di, int curr_ua) |
13151631 AM |
365 | { |
366 | /* | |
367 | * We want to know if we're in low current mode | |
368 | */ | |
0525f34d | 369 | if (curr_ua > -di->bm->fg_params->high_curr_threshold_ua) |
13151631 AM |
370 | return true; |
371 | else | |
372 | return false; | |
373 | } | |
374 | ||
375 | /** | |
376 | * ab8500_fg_add_cap_sample() - Add capacity to average filter | |
377 | * @di: pointer to the ab8500_fg structure | |
378 | * @sample: the capacity in mAh to add to the filter | |
379 | * | |
380 | * A capacity is added to the filter and a new mean capacity is calculated and | |
381 | * returned | |
382 | */ | |
383 | static int ab8500_fg_add_cap_sample(struct ab8500_fg *di, int sample) | |
384 | { | |
8b0d62d4 | 385 | time64_t now = ktime_get_boottime_seconds(); |
13151631 AM |
386 | struct ab8500_fg_avg_cap *avg = &di->avg_cap; |
387 | ||
13151631 AM |
388 | do { |
389 | avg->sum += sample - avg->samples[avg->pos]; | |
390 | avg->samples[avg->pos] = sample; | |
8b0d62d4 | 391 | avg->time_stamps[avg->pos] = now; |
13151631 AM |
392 | avg->pos++; |
393 | ||
394 | if (avg->pos == NBR_AVG_SAMPLES) | |
395 | avg->pos = 0; | |
396 | ||
397 | if (avg->nbr_samples < NBR_AVG_SAMPLES) | |
398 | avg->nbr_samples++; | |
399 | ||
400 | /* | |
401 | * Check the time stamp for each sample. If too old, | |
402 | * replace with latest sample | |
403 | */ | |
8b0d62d4 | 404 | } while (now - VALID_CAPACITY_SEC > avg->time_stamps[avg->pos]); |
13151631 AM |
405 | |
406 | avg->avg = avg->sum / avg->nbr_samples; | |
407 | ||
408 | return avg->avg; | |
409 | } | |
410 | ||
411 | /** | |
412 | * ab8500_fg_clear_cap_samples() - Clear average filter | |
413 | * @di: pointer to the ab8500_fg structure | |
414 | * | |
415 | * The capacity filter is is reset to zero. | |
416 | */ | |
417 | static void ab8500_fg_clear_cap_samples(struct ab8500_fg *di) | |
418 | { | |
419 | int i; | |
420 | struct ab8500_fg_avg_cap *avg = &di->avg_cap; | |
421 | ||
422 | avg->pos = 0; | |
423 | avg->nbr_samples = 0; | |
424 | avg->sum = 0; | |
425 | avg->avg = 0; | |
426 | ||
427 | for (i = 0; i < NBR_AVG_SAMPLES; i++) { | |
428 | avg->samples[i] = 0; | |
429 | avg->time_stamps[i] = 0; | |
430 | } | |
431 | } | |
432 | ||
433 | /** | |
434 | * ab8500_fg_fill_cap_sample() - Fill average filter | |
435 | * @di: pointer to the ab8500_fg structure | |
436 | * @sample: the capacity in mAh to fill the filter with | |
437 | * | |
438 | * The capacity filter is filled with a capacity in mAh | |
439 | */ | |
440 | static void ab8500_fg_fill_cap_sample(struct ab8500_fg *di, int sample) | |
441 | { | |
442 | int i; | |
8b0d62d4 | 443 | time64_t now; |
13151631 AM |
444 | struct ab8500_fg_avg_cap *avg = &di->avg_cap; |
445 | ||
8b0d62d4 | 446 | now = ktime_get_boottime_seconds(); |
13151631 AM |
447 | |
448 | for (i = 0; i < NBR_AVG_SAMPLES; i++) { | |
449 | avg->samples[i] = sample; | |
8b0d62d4 | 450 | avg->time_stamps[i] = now; |
13151631 AM |
451 | } |
452 | ||
453 | avg->pos = 0; | |
454 | avg->nbr_samples = NBR_AVG_SAMPLES; | |
455 | avg->sum = sample * NBR_AVG_SAMPLES; | |
456 | avg->avg = sample; | |
457 | } | |
458 | ||
459 | /** | |
460 | * ab8500_fg_coulomb_counter() - enable coulomb counter | |
461 | * @di: pointer to the ab8500_fg structure | |
462 | * @enable: enable/disable | |
463 | * | |
464 | * Enable/Disable coulomb counter. | |
465 | * On failure returns negative value. | |
466 | */ | |
467 | static int ab8500_fg_coulomb_counter(struct ab8500_fg *di, bool enable) | |
468 | { | |
469 | int ret = 0; | |
470 | mutex_lock(&di->cc_lock); | |
471 | if (enable) { | |
472 | /* To be able to reprogram the number of samples, we have to | |
473 | * first stop the CC and then enable it again */ | |
474 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
475 | AB8500_RTC_CC_CONF_REG, 0x00); | |
476 | if (ret) | |
477 | goto cc_err; | |
478 | ||
479 | /* Program the samples */ | |
480 | ret = abx500_set_register_interruptible(di->dev, | |
481 | AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU, | |
482 | di->fg_samples); | |
483 | if (ret) | |
484 | goto cc_err; | |
485 | ||
486 | /* Start the CC */ | |
487 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
488 | AB8500_RTC_CC_CONF_REG, | |
489 | (CC_DEEP_SLEEP_ENA | CC_PWR_UP_ENA)); | |
490 | if (ret) | |
491 | goto cc_err; | |
492 | ||
493 | di->flags.fg_enabled = true; | |
494 | } else { | |
495 | /* Clear any pending read requests */ | |
e32ad07c KK |
496 | ret = abx500_mask_and_set_register_interruptible(di->dev, |
497 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
498 | (RESET_ACCU | READ_REQ), 0); | |
13151631 AM |
499 | if (ret) |
500 | goto cc_err; | |
501 | ||
502 | ret = abx500_set_register_interruptible(di->dev, | |
503 | AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU_CTRL, 0); | |
504 | if (ret) | |
505 | goto cc_err; | |
506 | ||
507 | /* Stop the CC */ | |
508 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
509 | AB8500_RTC_CC_CONF_REG, 0); | |
510 | if (ret) | |
511 | goto cc_err; | |
512 | ||
513 | di->flags.fg_enabled = false; | |
514 | ||
515 | } | |
516 | dev_dbg(di->dev, " CC enabled: %d Samples: %d\n", | |
517 | enable, di->fg_samples); | |
518 | ||
519 | mutex_unlock(&di->cc_lock); | |
520 | ||
521 | return ret; | |
522 | cc_err: | |
523 | dev_err(di->dev, "%s Enabling coulomb counter failed\n", __func__); | |
524 | mutex_unlock(&di->cc_lock); | |
525 | return ret; | |
526 | } | |
527 | ||
528 | /** | |
529 | * ab8500_fg_inst_curr_start() - start battery instantaneous current | |
530 | * @di: pointer to the ab8500_fg structure | |
531 | * | |
532 | * Returns 0 or error code | |
533 | * Note: This is part "one" and has to be called before | |
534 | * ab8500_fg_inst_curr_finalize() | |
535 | */ | |
3988a4df | 536 | int ab8500_fg_inst_curr_start(struct ab8500_fg *di) |
13151631 AM |
537 | { |
538 | u8 reg_val; | |
539 | int ret; | |
540 | ||
541 | mutex_lock(&di->cc_lock); | |
542 | ||
3988a4df | 543 | di->nbr_cceoc_irq_cnt = 0; |
13151631 AM |
544 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, |
545 | AB8500_RTC_CC_CONF_REG, ®_val); | |
546 | if (ret < 0) | |
547 | goto fail; | |
548 | ||
549 | if (!(reg_val & CC_PWR_UP_ENA)) { | |
550 | dev_dbg(di->dev, "%s Enable FG\n", __func__); | |
551 | di->turn_off_fg = true; | |
552 | ||
553 | /* Program the samples */ | |
554 | ret = abx500_set_register_interruptible(di->dev, | |
555 | AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU, | |
556 | SEC_TO_SAMPLE(10)); | |
557 | if (ret) | |
558 | goto fail; | |
559 | ||
560 | /* Start the CC */ | |
561 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
562 | AB8500_RTC_CC_CONF_REG, | |
563 | (CC_DEEP_SLEEP_ENA | CC_PWR_UP_ENA)); | |
564 | if (ret) | |
565 | goto fail; | |
566 | } else { | |
567 | di->turn_off_fg = false; | |
568 | } | |
569 | ||
570 | /* Return and WFI */ | |
16735d02 WS |
571 | reinit_completion(&di->ab8500_fg_started); |
572 | reinit_completion(&di->ab8500_fg_complete); | |
13151631 AM |
573 | enable_irq(di->irq); |
574 | ||
575 | /* Note: cc_lock is still locked */ | |
576 | return 0; | |
577 | fail: | |
578 | mutex_unlock(&di->cc_lock); | |
579 | return ret; | |
580 | } | |
581 | ||
3988a4df JB |
582 | /** |
583 | * ab8500_fg_inst_curr_started() - check if fg conversion has started | |
584 | * @di: pointer to the ab8500_fg structure | |
585 | * | |
586 | * Returns 1 if conversion started, 0 if still waiting | |
587 | */ | |
588 | int ab8500_fg_inst_curr_started(struct ab8500_fg *di) | |
589 | { | |
590 | return completion_done(&di->ab8500_fg_started); | |
591 | } | |
592 | ||
13151631 AM |
593 | /** |
594 | * ab8500_fg_inst_curr_done() - check if fg conversion is done | |
595 | * @di: pointer to the ab8500_fg structure | |
596 | * | |
597 | * Returns 1 if conversion done, 0 if still waiting | |
598 | */ | |
599 | int ab8500_fg_inst_curr_done(struct ab8500_fg *di) | |
600 | { | |
601 | return completion_done(&di->ab8500_fg_complete); | |
602 | } | |
603 | ||
604 | /** | |
605 | * ab8500_fg_inst_curr_finalize() - battery instantaneous current | |
606 | * @di: pointer to the ab8500_fg structure | |
0525f34d | 607 | * @curr_ua: battery instantenous current in microampere (on success) |
13151631 AM |
608 | * |
609 | * Returns 0 or an error code | |
610 | * Note: This is part "two" and has to be called at earliest 250 ms | |
611 | * after ab8500_fg_inst_curr_start() | |
612 | */ | |
0525f34d | 613 | int ab8500_fg_inst_curr_finalize(struct ab8500_fg *di, int *curr_ua) |
13151631 AM |
614 | { |
615 | u8 low, high; | |
616 | int val; | |
617 | int ret; | |
5ae6e2a8 | 618 | unsigned long timeout; |
13151631 AM |
619 | |
620 | if (!completion_done(&di->ab8500_fg_complete)) { | |
3988a4df JB |
621 | timeout = wait_for_completion_timeout( |
622 | &di->ab8500_fg_complete, | |
13151631 AM |
623 | INS_CURR_TIMEOUT); |
624 | dev_dbg(di->dev, "Finalize time: %d ms\n", | |
298631e1 | 625 | jiffies_to_msecs(INS_CURR_TIMEOUT - timeout)); |
13151631 AM |
626 | if (!timeout) { |
627 | ret = -ETIME; | |
628 | disable_irq(di->irq); | |
3988a4df | 629 | di->nbr_cceoc_irq_cnt = 0; |
13151631 AM |
630 | dev_err(di->dev, "completion timed out [%d]\n", |
631 | __LINE__); | |
632 | goto fail; | |
633 | } | |
634 | } | |
635 | ||
636 | disable_irq(di->irq); | |
3988a4df | 637 | di->nbr_cceoc_irq_cnt = 0; |
13151631 AM |
638 | |
639 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
640 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
641 | READ_REQ, READ_REQ); | |
642 | ||
643 | /* 100uS between read request and read is needed */ | |
644 | usleep_range(100, 100); | |
645 | ||
646 | /* Read CC Sample conversion value Low and high */ | |
647 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
648 | AB8500_GASG_CC_SMPL_CNVL_REG, &low); | |
649 | if (ret < 0) | |
650 | goto fail; | |
651 | ||
652 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
653 | AB8500_GASG_CC_SMPL_CNVH_REG, &high); | |
654 | if (ret < 0) | |
655 | goto fail; | |
656 | ||
657 | /* | |
658 | * negative value for Discharging | |
ec3af53a | 659 | * convert 2's complement into decimal |
13151631 AM |
660 | */ |
661 | if (high & 0x10) | |
662 | val = (low | (high << 8) | 0xFFFFE000); | |
663 | else | |
664 | val = (low | (high << 8)); | |
665 | ||
666 | /* | |
667 | * Convert to unit value in mA | |
668 | * Full scale input voltage is | |
0525f34d | 669 | * 63.160mV => LSB = 63.160mV/(4096*res) = 1.542.000 uA |
13151631 | 670 | * Given a 250ms conversion cycle time the LSB corresponds |
0577610e | 671 | * to 107.1 nAh. Convert to current by dividing by the conversion |
13151631 | 672 | * time in hours (250ms = 1 / (3600 * 4)h) |
0577610e | 673 | * 107.1nAh assumes 10mOhm, but fg_res is in 0.1mOhm |
13151631 | 674 | */ |
0525f34d | 675 | val = (val * QLSB_NANO_AMP_HOURS_X10 * 36 * 4) / di->bm->fg_res; |
13151631 AM |
676 | |
677 | if (di->turn_off_fg) { | |
678 | dev_dbg(di->dev, "%s Disable FG\n", __func__); | |
679 | ||
680 | /* Clear any pending read requests */ | |
681 | ret = abx500_set_register_interruptible(di->dev, | |
682 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, 0); | |
683 | if (ret) | |
684 | goto fail; | |
685 | ||
686 | /* Stop the CC */ | |
687 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
688 | AB8500_RTC_CC_CONF_REG, 0); | |
689 | if (ret) | |
690 | goto fail; | |
691 | } | |
692 | mutex_unlock(&di->cc_lock); | |
0525f34d | 693 | *curr_ua = val; |
13151631 AM |
694 | |
695 | return 0; | |
696 | fail: | |
697 | mutex_unlock(&di->cc_lock); | |
698 | return ret; | |
699 | } | |
700 | ||
701 | /** | |
702 | * ab8500_fg_inst_curr_blocking() - battery instantaneous current | |
703 | * @di: pointer to the ab8500_fg structure | |
13151631 | 704 | * |
0525f34d LW |
705 | * Returns battery instantenous current in microampere (on success) |
706 | * else error code | |
13151631 AM |
707 | */ |
708 | int ab8500_fg_inst_curr_blocking(struct ab8500_fg *di) | |
709 | { | |
710 | int ret; | |
5ae6e2a8 | 711 | unsigned long timeout; |
0525f34d | 712 | int curr_ua = 0; |
13151631 AM |
713 | |
714 | ret = ab8500_fg_inst_curr_start(di); | |
715 | if (ret) { | |
716 | dev_err(di->dev, "Failed to initialize fg_inst\n"); | |
717 | return 0; | |
718 | } | |
719 | ||
3988a4df JB |
720 | /* Wait for CC to actually start */ |
721 | if (!completion_done(&di->ab8500_fg_started)) { | |
722 | timeout = wait_for_completion_timeout( | |
723 | &di->ab8500_fg_started, | |
724 | INS_CURR_TIMEOUT); | |
725 | dev_dbg(di->dev, "Start time: %d ms\n", | |
298631e1 | 726 | jiffies_to_msecs(INS_CURR_TIMEOUT - timeout)); |
3988a4df JB |
727 | if (!timeout) { |
728 | ret = -ETIME; | |
729 | dev_err(di->dev, "completion timed out [%d]\n", | |
730 | __LINE__); | |
731 | goto fail; | |
732 | } | |
733 | } | |
734 | ||
0525f34d | 735 | ret = ab8500_fg_inst_curr_finalize(di, &curr_ua); |
13151631 AM |
736 | if (ret) { |
737 | dev_err(di->dev, "Failed to finalize fg_inst\n"); | |
738 | return 0; | |
739 | } | |
740 | ||
0525f34d LW |
741 | dev_dbg(di->dev, "%s instant current: %d uA", __func__, curr_ua); |
742 | return curr_ua; | |
3988a4df | 743 | fail: |
129d583b | 744 | disable_irq(di->irq); |
3988a4df JB |
745 | mutex_unlock(&di->cc_lock); |
746 | return ret; | |
13151631 AM |
747 | } |
748 | ||
749 | /** | |
750 | * ab8500_fg_acc_cur_work() - average battery current | |
751 | * @work: pointer to the work_struct structure | |
752 | * | |
753 | * Updated the average battery current obtained from the | |
754 | * coulomb counter. | |
755 | */ | |
756 | static void ab8500_fg_acc_cur_work(struct work_struct *work) | |
757 | { | |
758 | int val; | |
759 | int ret; | |
760 | u8 low, med, high; | |
761 | ||
762 | struct ab8500_fg *di = container_of(work, | |
763 | struct ab8500_fg, fg_acc_cur_work); | |
764 | ||
765 | mutex_lock(&di->cc_lock); | |
766 | ret = abx500_set_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
767 | AB8500_GASG_CC_NCOV_ACCU_CTRL, RD_NCONV_ACCU_REQ); | |
768 | if (ret) | |
769 | goto exit; | |
770 | ||
771 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
772 | AB8500_GASG_CC_NCOV_ACCU_LOW, &low); | |
773 | if (ret < 0) | |
774 | goto exit; | |
775 | ||
776 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
777 | AB8500_GASG_CC_NCOV_ACCU_MED, &med); | |
778 | if (ret < 0) | |
779 | goto exit; | |
780 | ||
781 | ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, | |
782 | AB8500_GASG_CC_NCOV_ACCU_HIGH, &high); | |
783 | if (ret < 0) | |
784 | goto exit; | |
785 | ||
ec3af53a | 786 | /* Check for sign bit in case of negative value, 2's complement */ |
13151631 AM |
787 | if (high & 0x10) |
788 | val = (low | (med << 8) | (high << 16) | 0xFFE00000); | |
789 | else | |
790 | val = (low | (med << 8) | (high << 16)); | |
791 | ||
792 | /* | |
793 | * Convert to uAh | |
794 | * Given a 250ms conversion cycle time the LSB corresponds | |
795 | * to 112.9 nAh. | |
796 | * 112.9nAh assumes 10mOhm, but fg_res is in 0.1mOhm | |
797 | */ | |
798 | di->accu_charge = (val * QLSB_NANO_AMP_HOURS_X10) / | |
b0284de0 | 799 | (100 * di->bm->fg_res); |
13151631 AM |
800 | |
801 | /* | |
0525f34d | 802 | * Convert to unit value in uA |
f902dadc | 803 | * by dividing by the conversion |
13151631 | 804 | * time in hours (= samples / (3600 * 4)h) |
13151631 | 805 | */ |
0525f34d LW |
806 | di->avg_curr_ua = (val * QLSB_NANO_AMP_HOURS_X10 * 36) / |
807 | (di->bm->fg_res * (di->fg_samples / 4)); | |
13151631 AM |
808 | |
809 | di->flags.conv_done = true; | |
810 | ||
811 | mutex_unlock(&di->cc_lock); | |
812 | ||
813 | queue_work(di->fg_wq, &di->fg_work); | |
814 | ||
f902dadc POH |
815 | dev_dbg(di->dev, "fg_res: %d, fg_samples: %d, gasg: %d, accu_charge: %d \n", |
816 | di->bm->fg_res, di->fg_samples, val, di->accu_charge); | |
13151631 AM |
817 | return; |
818 | exit: | |
819 | dev_err(di->dev, | |
820 | "Failed to read or write gas gauge registers\n"); | |
821 | mutex_unlock(&di->cc_lock); | |
822 | queue_work(di->fg_wq, &di->fg_work); | |
823 | } | |
824 | ||
825 | /** | |
826 | * ab8500_fg_bat_voltage() - get battery voltage | |
827 | * @di: pointer to the ab8500_fg structure | |
828 | * | |
0525f34d | 829 | * Returns battery voltage in microvolts (on success) else error code |
13151631 AM |
830 | */ |
831 | static int ab8500_fg_bat_voltage(struct ab8500_fg *di) | |
832 | { | |
1e82623c | 833 | int vbat, ret; |
13151631 AM |
834 | static int prev; |
835 | ||
1e82623c LW |
836 | ret = iio_read_channel_processed(di->main_bat_v, &vbat); |
837 | if (ret < 0) { | |
13151631 | 838 | dev_err(di->dev, |
1e82623c | 839 | "%s ADC conversion failed, using previous value\n", |
13151631 AM |
840 | __func__); |
841 | return prev; | |
842 | } | |
843 | ||
0525f34d LW |
844 | /* IIO returns millivolts but we want microvolts */ |
845 | vbat *= 1000; | |
13151631 AM |
846 | prev = vbat; |
847 | return vbat; | |
848 | } | |
849 | ||
850 | /** | |
851 | * ab8500_fg_volt_to_capacity() - Voltage based capacity | |
852 | * @di: pointer to the ab8500_fg structure | |
0525f34d | 853 | * @voltage_uv: The voltage to convert to a capacity in microvolt |
13151631 AM |
854 | * |
855 | * Returns battery capacity in per mille based on voltage | |
856 | */ | |
0525f34d | 857 | static int ab8500_fg_volt_to_capacity(struct ab8500_fg *di, int voltage_uv) |
13151631 | 858 | { |
25fd3303 | 859 | struct power_supply_battery_info *bi = di->bm->bi; |
13151631 | 860 | |
0525f34d LW |
861 | /* Multiply by 10 because the capacity is tracked in per mille */ |
862 | return power_supply_batinfo_ocv2cap(bi, voltage_uv, di->bat_temp) * 10; | |
13151631 AM |
863 | } |
864 | ||
865 | /** | |
866 | * ab8500_fg_uncomp_volt_to_capacity() - Uncompensated voltage based capacity | |
867 | * @di: pointer to the ab8500_fg structure | |
868 | * | |
869 | * Returns battery capacity based on battery voltage that is not compensated | |
870 | * for the voltage drop due to the load | |
871 | */ | |
872 | static int ab8500_fg_uncomp_volt_to_capacity(struct ab8500_fg *di) | |
873 | { | |
0525f34d LW |
874 | di->vbat_uv = ab8500_fg_bat_voltage(di); |
875 | return ab8500_fg_volt_to_capacity(di, di->vbat_uv); | |
13151631 AM |
876 | } |
877 | ||
878 | /** | |
879 | * ab8500_fg_battery_resistance() - Returns the battery inner resistance | |
880 | * @di: pointer to the ab8500_fg structure | |
bc5d4a24 | 881 | * @vbat_uncomp_uv: Uncompensated VBAT voltage |
13151631 AM |
882 | * |
883 | * Returns battery inner resistance added with the fuel gauge resistor value | |
67acb291 LW |
884 | * to get the total resistance in the whole link from gnd to bat+ node |
885 | * in milliohm. | |
13151631 | 886 | */ |
bc5d4a24 | 887 | static int ab8500_fg_battery_resistance(struct ab8500_fg *di, int vbat_uncomp_uv) |
13151631 | 888 | { |
25fd3303 | 889 | struct power_supply_battery_info *bi = di->bm->bi; |
67acb291 LW |
890 | int resistance_percent = 0; |
891 | int resistance; | |
13151631 | 892 | |
67acb291 | 893 | /* |
bc5d4a24 LW |
894 | * Determine the resistance at this voltage. First try VBAT-to-Ri else |
895 | * just infer it from the surrounding temperature, if nothing works just | |
896 | * use the internal resistance. | |
67acb291 | 897 | */ |
bc5d4a24 LW |
898 | if (power_supply_supports_vbat2ri(bi)) { |
899 | resistance = power_supply_vbat2ri(bi, vbat_uncomp_uv, di->flags.charging); | |
900 | /* Convert to milliohm */ | |
901 | resistance = resistance / 1000; | |
902 | } else if (power_supply_supports_temp2ri(bi)) { | |
903 | resistance_percent = power_supply_temp2resist_simple(bi->resist_table, | |
904 | bi->resist_table_size, | |
905 | di->bat_temp / 10); | |
906 | /* Convert to milliohm */ | |
907 | resistance = bi->factory_internal_resistance_uohm / 1000; | |
908 | resistance = resistance * resistance_percent / 100; | |
909 | } else { | |
910 | /* Last fallback */ | |
911 | resistance = bi->factory_internal_resistance_uohm / 1000; | |
912 | } | |
13151631 | 913 | |
1ae4a91c LW |
914 | /* Compensate for line impedance */ |
915 | resistance += (di->line_impedance_uohm / 1000); | |
916 | ||
13151631 AM |
917 | dev_dbg(di->dev, "%s Temp: %d battery internal resistance: %d" |
918 | " fg resistance %d, total: %d (mOhm)\n", | |
67acb291 LW |
919 | __func__, di->bat_temp, resistance, di->bm->fg_res / 10, |
920 | (di->bm->fg_res / 10) + resistance); | |
13151631 AM |
921 | |
922 | /* fg_res variable is in 0.1mOhm */ | |
67acb291 | 923 | resistance += di->bm->fg_res / 10; |
13151631 | 924 | |
67acb291 | 925 | return resistance; |
13151631 AM |
926 | } |
927 | ||
928 | /** | |
673b5032 | 929 | * ab8500_load_comp_fg_bat_voltage() - get load compensated battery voltage |
13151631 | 930 | * @di: pointer to the ab8500_fg structure |
965a9904 | 931 | * @always: always return a voltage, also uncompensated |
13151631 | 932 | * |
673b5032 LW |
933 | * Returns compensated battery voltage (on success) else error code. |
934 | * If always is specified, we always return a voltage but it may be | |
935 | * uncompensated. | |
13151631 | 936 | */ |
965a9904 | 937 | static int ab8500_load_comp_fg_bat_voltage(struct ab8500_fg *di, bool always) |
13151631 | 938 | { |
13151631 | 939 | int i = 0; |
0525f34d | 940 | int vbat_uv = 0; |
673b5032 | 941 | int rcomp; |
13151631 | 942 | |
673b5032 | 943 | /* Average the instant current to get a stable current measurement */ |
13151631 AM |
944 | ab8500_fg_inst_curr_start(di); |
945 | ||
946 | do { | |
0525f34d | 947 | vbat_uv += ab8500_fg_bat_voltage(di); |
13151631 | 948 | i++; |
9a0bd070 | 949 | usleep_range(5000, 6000); |
edc400e1 LW |
950 | } while (!ab8500_fg_inst_curr_done(di) && |
951 | i <= WAIT_FOR_INST_CURRENT_MAX); | |
952 | ||
953 | if (i > WAIT_FOR_INST_CURRENT_MAX) { | |
954 | dev_err(di->dev, | |
673b5032 LW |
955 | "TIMEOUT: return uncompensated measurement of VBAT\n"); |
956 | di->vbat_uv = vbat_uv / i; | |
957 | return di->vbat_uv; | |
edc400e1 | 958 | } |
13151631 | 959 | |
0525f34d | 960 | ab8500_fg_inst_curr_finalize(di, &di->inst_curr_ua); |
13151631 | 961 | |
965a9904 LW |
962 | /* |
963 | * If there is too high current dissipation, the compensation cannot be | |
964 | * trusted so return an error unless we must return something here, as | |
965 | * enforced by the "always" parameter. | |
966 | */ | |
967 | if (!always && di->inst_curr_ua < IGNORE_VBAT_HIGHCUR) | |
968 | return -EINVAL; | |
969 | ||
673b5032 | 970 | vbat_uv = vbat_uv / i; |
13151631 | 971 | |
673b5032 | 972 | /* Next we apply voltage compensation from internal resistance */ |
bc5d4a24 | 973 | rcomp = ab8500_fg_battery_resistance(di, vbat_uv); |
673b5032 LW |
974 | vbat_uv = vbat_uv - (di->inst_curr_ua * rcomp) / 1000; |
975 | ||
976 | /* Always keep this state at latest measurement */ | |
977 | di->vbat_uv = vbat_uv; | |
978 | ||
979 | return vbat_uv; | |
980 | } | |
981 | ||
982 | /** | |
983 | * ab8500_fg_load_comp_volt_to_capacity() - Load compensated voltage based capacity | |
984 | * @di: pointer to the ab8500_fg structure | |
985 | * | |
986 | * Returns battery capacity based on battery voltage that is load compensated | |
987 | * for the voltage drop | |
988 | */ | |
989 | static int ab8500_fg_load_comp_volt_to_capacity(struct ab8500_fg *di) | |
990 | { | |
991 | int vbat_comp_uv; | |
13151631 | 992 | |
965a9904 | 993 | vbat_comp_uv = ab8500_load_comp_fg_bat_voltage(di, true); |
13151631 | 994 | |
0525f34d | 995 | return ab8500_fg_volt_to_capacity(di, vbat_comp_uv); |
13151631 AM |
996 | } |
997 | ||
998 | /** | |
999 | * ab8500_fg_convert_mah_to_permille() - Capacity in mAh to permille | |
1000 | * @di: pointer to the ab8500_fg structure | |
1001 | * @cap_mah: capacity in mAh | |
1002 | * | |
1003 | * Converts capacity in mAh to capacity in permille | |
1004 | */ | |
1005 | static int ab8500_fg_convert_mah_to_permille(struct ab8500_fg *di, int cap_mah) | |
1006 | { | |
1007 | return (cap_mah * 1000) / di->bat_cap.max_mah_design; | |
1008 | } | |
1009 | ||
1010 | /** | |
1011 | * ab8500_fg_convert_permille_to_mah() - Capacity in permille to mAh | |
1012 | * @di: pointer to the ab8500_fg structure | |
1013 | * @cap_pm: capacity in permille | |
1014 | * | |
1015 | * Converts capacity in permille to capacity in mAh | |
1016 | */ | |
1017 | static int ab8500_fg_convert_permille_to_mah(struct ab8500_fg *di, int cap_pm) | |
1018 | { | |
1019 | return cap_pm * di->bat_cap.max_mah_design / 1000; | |
1020 | } | |
1021 | ||
1022 | /** | |
1023 | * ab8500_fg_convert_mah_to_uwh() - Capacity in mAh to uWh | |
1024 | * @di: pointer to the ab8500_fg structure | |
1025 | * @cap_mah: capacity in mAh | |
1026 | * | |
1027 | * Converts capacity in mAh to capacity in uWh | |
1028 | */ | |
1029 | static int ab8500_fg_convert_mah_to_uwh(struct ab8500_fg *di, int cap_mah) | |
1030 | { | |
1031 | u64 div_res; | |
1032 | u32 div_rem; | |
1033 | ||
2a5f4183 LW |
1034 | /* |
1035 | * Capacity is in milli ampere hours (10^-3)Ah | |
1036 | * Nominal voltage is in microvolts (10^-6)V | |
1037 | * divide by 1000000 after multiplication to get to mWh | |
1038 | */ | |
1039 | div_res = ((u64) cap_mah) * ((u64) di->vbat_nom_uv); | |
1040 | div_rem = do_div(div_res, 1000000); | |
13151631 AM |
1041 | |
1042 | /* Make sure to round upwards if necessary */ | |
2a5f4183 | 1043 | if (div_rem >= 1000000 / 2) |
13151631 AM |
1044 | div_res++; |
1045 | ||
1046 | return (int) div_res; | |
1047 | } | |
1048 | ||
1049 | /** | |
1050 | * ab8500_fg_calc_cap_charging() - Calculate remaining capacity while charging | |
1051 | * @di: pointer to the ab8500_fg structure | |
1052 | * | |
1053 | * Return the capacity in mAh based on previous calculated capcity and the FG | |
1054 | * accumulator register value. The filter is filled with this capacity | |
1055 | */ | |
1056 | static int ab8500_fg_calc_cap_charging(struct ab8500_fg *di) | |
1057 | { | |
1058 | dev_dbg(di->dev, "%s cap_mah %d accu_charge %d\n", | |
1059 | __func__, | |
1060 | di->bat_cap.mah, | |
1061 | di->accu_charge); | |
1062 | ||
1063 | /* Capacity should not be less than 0 */ | |
1064 | if (di->bat_cap.mah + di->accu_charge > 0) | |
1065 | di->bat_cap.mah += di->accu_charge; | |
1066 | else | |
1067 | di->bat_cap.mah = 0; | |
1068 | /* | |
1069 | * We force capacity to 100% once when the algorithm | |
1070 | * reports that it's full. | |
1071 | */ | |
1072 | if (di->bat_cap.mah >= di->bat_cap.max_mah_design || | |
1073 | di->flags.force_full) { | |
1074 | di->bat_cap.mah = di->bat_cap.max_mah_design; | |
1075 | } | |
1076 | ||
1077 | ab8500_fg_fill_cap_sample(di, di->bat_cap.mah); | |
1078 | di->bat_cap.permille = | |
1079 | ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); | |
1080 | ||
1081 | /* We need to update battery voltage and inst current when charging */ | |
0525f34d LW |
1082 | di->vbat_uv = ab8500_fg_bat_voltage(di); |
1083 | di->inst_curr_ua = ab8500_fg_inst_curr_blocking(di); | |
13151631 AM |
1084 | |
1085 | return di->bat_cap.mah; | |
1086 | } | |
1087 | ||
1088 | /** | |
1089 | * ab8500_fg_calc_cap_discharge_voltage() - Capacity in discharge with voltage | |
1090 | * @di: pointer to the ab8500_fg structure | |
13151631 | 1091 | * |
3bab7363 LW |
1092 | * Return the capacity in mAh based on the load compensated battery voltage. |
1093 | * This value is added to the filter and a new mean value is calculated and | |
1094 | * returned. | |
13151631 | 1095 | */ |
3bab7363 | 1096 | static int ab8500_fg_calc_cap_discharge_voltage(struct ab8500_fg *di) |
13151631 AM |
1097 | { |
1098 | int permille, mah; | |
1099 | ||
3bab7363 | 1100 | permille = ab8500_fg_load_comp_volt_to_capacity(di); |
13151631 AM |
1101 | |
1102 | mah = ab8500_fg_convert_permille_to_mah(di, permille); | |
1103 | ||
1104 | di->bat_cap.mah = ab8500_fg_add_cap_sample(di, mah); | |
1105 | di->bat_cap.permille = | |
1106 | ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); | |
1107 | ||
1108 | return di->bat_cap.mah; | |
1109 | } | |
1110 | ||
1111 | /** | |
1112 | * ab8500_fg_calc_cap_discharge_fg() - Capacity in discharge with FG | |
1113 | * @di: pointer to the ab8500_fg structure | |
1114 | * | |
1115 | * Return the capacity in mAh based on previous calculated capcity and the FG | |
1116 | * accumulator register value. This value is added to the filter and a | |
1117 | * new mean value is calculated and returned. | |
1118 | */ | |
1119 | static int ab8500_fg_calc_cap_discharge_fg(struct ab8500_fg *di) | |
1120 | { | |
1121 | int permille_volt, permille; | |
1122 | ||
1123 | dev_dbg(di->dev, "%s cap_mah %d accu_charge %d\n", | |
1124 | __func__, | |
1125 | di->bat_cap.mah, | |
1126 | di->accu_charge); | |
1127 | ||
1128 | /* Capacity should not be less than 0 */ | |
1129 | if (di->bat_cap.mah + di->accu_charge > 0) | |
1130 | di->bat_cap.mah += di->accu_charge; | |
1131 | else | |
1132 | di->bat_cap.mah = 0; | |
1133 | ||
1134 | if (di->bat_cap.mah >= di->bat_cap.max_mah_design) | |
1135 | di->bat_cap.mah = di->bat_cap.max_mah_design; | |
1136 | ||
1137 | /* | |
1138 | * Check against voltage based capacity. It can not be lower | |
1139 | * than what the uncompensated voltage says | |
1140 | */ | |
1141 | permille = ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); | |
1142 | permille_volt = ab8500_fg_uncomp_volt_to_capacity(di); | |
1143 | ||
1144 | if (permille < permille_volt) { | |
1145 | di->bat_cap.permille = permille_volt; | |
1146 | di->bat_cap.mah = ab8500_fg_convert_permille_to_mah(di, | |
1147 | di->bat_cap.permille); | |
1148 | ||
1149 | dev_dbg(di->dev, "%s voltage based: perm %d perm_volt %d\n", | |
1150 | __func__, | |
1151 | permille, | |
1152 | permille_volt); | |
1153 | ||
1154 | ab8500_fg_fill_cap_sample(di, di->bat_cap.mah); | |
1155 | } else { | |
1156 | ab8500_fg_fill_cap_sample(di, di->bat_cap.mah); | |
1157 | di->bat_cap.permille = | |
1158 | ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); | |
1159 | } | |
1160 | ||
1161 | return di->bat_cap.mah; | |
1162 | } | |
1163 | ||
1164 | /** | |
1165 | * ab8500_fg_capacity_level() - Get the battery capacity level | |
1166 | * @di: pointer to the ab8500_fg structure | |
1167 | * | |
1168 | * Get the battery capacity level based on the capacity in percent | |
1169 | */ | |
1170 | static int ab8500_fg_capacity_level(struct ab8500_fg *di) | |
1171 | { | |
1172 | int ret, percent; | |
1173 | ||
6eaf8740 | 1174 | percent = DIV_ROUND_CLOSEST(di->bat_cap.permille, 10); |
13151631 | 1175 | |
b0284de0 | 1176 | if (percent <= di->bm->cap_levels->critical || |
13151631 AM |
1177 | di->flags.low_bat) |
1178 | ret = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; | |
b0284de0 | 1179 | else if (percent <= di->bm->cap_levels->low) |
13151631 | 1180 | ret = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
b0284de0 | 1181 | else if (percent <= di->bm->cap_levels->normal) |
13151631 | 1182 | ret = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; |
b0284de0 | 1183 | else if (percent <= di->bm->cap_levels->high) |
13151631 AM |
1184 | ret = POWER_SUPPLY_CAPACITY_LEVEL_HIGH; |
1185 | else | |
1186 | ret = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
1187 | ||
1188 | return ret; | |
1189 | } | |
1190 | ||
ea402401 MC |
1191 | /** |
1192 | * ab8500_fg_calculate_scaled_capacity() - Capacity scaling | |
1193 | * @di: pointer to the ab8500_fg structure | |
1194 | * | |
1195 | * Calculates the capacity to be shown to upper layers. Scales the capacity | |
1196 | * to have 100% as a reference from the actual capacity upon removal of charger | |
1197 | * when charging is in maintenance mode. | |
1198 | */ | |
1199 | static int ab8500_fg_calculate_scaled_capacity(struct ab8500_fg *di) | |
1200 | { | |
1201 | struct ab8500_fg_cap_scaling *cs = &di->bat_cap.cap_scale; | |
1202 | int capacity = di->bat_cap.prev_percent; | |
1203 | ||
1204 | if (!cs->enable) | |
1205 | return capacity; | |
1206 | ||
1207 | /* | |
1208 | * As long as we are in fully charge mode scale the capacity | |
1209 | * to show 100%. | |
1210 | */ | |
1211 | if (di->flags.fully_charged) { | |
1212 | cs->cap_to_scale[0] = 100; | |
1213 | cs->cap_to_scale[1] = | |
1214 | max(capacity, di->bm->fg_params->maint_thres); | |
1215 | dev_dbg(di->dev, "Scale cap with %d/%d\n", | |
1216 | cs->cap_to_scale[0], cs->cap_to_scale[1]); | |
1217 | } | |
1218 | ||
1219 | /* Calculates the scaled capacity. */ | |
1220 | if ((cs->cap_to_scale[0] != cs->cap_to_scale[1]) | |
1221 | && (cs->cap_to_scale[1] > 0)) | |
1222 | capacity = min(100, | |
1223 | DIV_ROUND_CLOSEST(di->bat_cap.prev_percent * | |
1224 | cs->cap_to_scale[0], | |
1225 | cs->cap_to_scale[1])); | |
1226 | ||
1227 | if (di->flags.charging) { | |
1228 | if (capacity < cs->disable_cap_level) { | |
1229 | cs->disable_cap_level = capacity; | |
1230 | dev_dbg(di->dev, "Cap to stop scale lowered %d%%\n", | |
1231 | cs->disable_cap_level); | |
1232 | } else if (!di->flags.fully_charged) { | |
1233 | if (di->bat_cap.prev_percent >= | |
1234 | cs->disable_cap_level) { | |
1235 | dev_dbg(di->dev, "Disabling scaled capacity\n"); | |
1236 | cs->enable = false; | |
1237 | capacity = di->bat_cap.prev_percent; | |
1238 | } else { | |
1239 | dev_dbg(di->dev, | |
1240 | "Waiting in cap to level %d%%\n", | |
1241 | cs->disable_cap_level); | |
1242 | capacity = cs->disable_cap_level; | |
1243 | } | |
1244 | } | |
1245 | } | |
1246 | ||
1247 | return capacity; | |
1248 | } | |
1249 | ||
1250 | /** | |
1251 | * ab8500_fg_update_cap_scalers() - Capacity scaling | |
1252 | * @di: pointer to the ab8500_fg structure | |
1253 | * | |
1254 | * To be called when state change from charge<->discharge to update | |
1255 | * the capacity scalers. | |
1256 | */ | |
1257 | static void ab8500_fg_update_cap_scalers(struct ab8500_fg *di) | |
1258 | { | |
1259 | struct ab8500_fg_cap_scaling *cs = &di->bat_cap.cap_scale; | |
1260 | ||
1261 | if (!cs->enable) | |
1262 | return; | |
1263 | if (di->flags.charging) { | |
1264 | di->bat_cap.cap_scale.disable_cap_level = | |
1265 | di->bat_cap.cap_scale.scaled_cap; | |
1266 | dev_dbg(di->dev, "Cap to stop scale at charge %d%%\n", | |
1267 | di->bat_cap.cap_scale.disable_cap_level); | |
1268 | } else { | |
1269 | if (cs->scaled_cap != 100) { | |
1270 | cs->cap_to_scale[0] = cs->scaled_cap; | |
1271 | cs->cap_to_scale[1] = di->bat_cap.prev_percent; | |
1272 | } else { | |
1273 | cs->cap_to_scale[0] = 100; | |
1274 | cs->cap_to_scale[1] = | |
1275 | max(di->bat_cap.prev_percent, | |
1276 | di->bm->fg_params->maint_thres); | |
1277 | } | |
1278 | ||
1279 | dev_dbg(di->dev, "Cap to scale at discharge %d/%d\n", | |
1280 | cs->cap_to_scale[0], cs->cap_to_scale[1]); | |
1281 | } | |
1282 | } | |
1283 | ||
13151631 AM |
1284 | /** |
1285 | * ab8500_fg_check_capacity_limits() - Check if capacity has changed | |
1286 | * @di: pointer to the ab8500_fg structure | |
1287 | * @init: capacity is allowed to go up in init mode | |
1288 | * | |
1289 | * Check if capacity or capacity limit has changed and notify the system | |
1290 | * about it using the power_supply framework | |
1291 | */ | |
1292 | static void ab8500_fg_check_capacity_limits(struct ab8500_fg *di, bool init) | |
1293 | { | |
1294 | bool changed = false; | |
6eaf8740 | 1295 | int percent = DIV_ROUND_CLOSEST(di->bat_cap.permille, 10); |
13151631 AM |
1296 | |
1297 | di->bat_cap.level = ab8500_fg_capacity_level(di); | |
1298 | ||
1299 | if (di->bat_cap.level != di->bat_cap.prev_level) { | |
1300 | /* | |
1301 | * We do not allow reported capacity level to go up | |
1302 | * unless we're charging or if we're in init | |
1303 | */ | |
1304 | if (!(!di->flags.charging && di->bat_cap.level > | |
1305 | di->bat_cap.prev_level) || init) { | |
1306 | dev_dbg(di->dev, "level changed from %d to %d\n", | |
1307 | di->bat_cap.prev_level, | |
1308 | di->bat_cap.level); | |
1309 | di->bat_cap.prev_level = di->bat_cap.level; | |
1310 | changed = true; | |
1311 | } else { | |
1312 | dev_dbg(di->dev, "level not allowed to go up " | |
1313 | "since no charger is connected: %d to %d\n", | |
1314 | di->bat_cap.prev_level, | |
1315 | di->bat_cap.level); | |
1316 | } | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * If we have received the LOW_BAT IRQ, set capacity to 0 to initiate | |
1321 | * shutdown | |
1322 | */ | |
1323 | if (di->flags.low_bat) { | |
1324 | dev_dbg(di->dev, "Battery low, set capacity to 0\n"); | |
1325 | di->bat_cap.prev_percent = 0; | |
1326 | di->bat_cap.permille = 0; | |
6eaf8740 | 1327 | percent = 0; |
13151631 AM |
1328 | di->bat_cap.prev_mah = 0; |
1329 | di->bat_cap.mah = 0; | |
1330 | changed = true; | |
1331 | } else if (di->flags.fully_charged) { | |
1332 | /* | |
1333 | * We report 100% if algorithm reported fully charged | |
ea402401 | 1334 | * and show 100% during maintenance charging (scaling). |
13151631 AM |
1335 | */ |
1336 | if (di->flags.force_full) { | |
6eaf8740 | 1337 | di->bat_cap.prev_percent = percent; |
13151631 | 1338 | di->bat_cap.prev_mah = di->bat_cap.mah; |
ea402401 MC |
1339 | |
1340 | changed = true; | |
1341 | ||
1342 | if (!di->bat_cap.cap_scale.enable && | |
1343 | di->bm->capacity_scaling) { | |
1344 | di->bat_cap.cap_scale.enable = true; | |
1345 | di->bat_cap.cap_scale.cap_to_scale[0] = 100; | |
1346 | di->bat_cap.cap_scale.cap_to_scale[1] = | |
1347 | di->bat_cap.prev_percent; | |
1348 | di->bat_cap.cap_scale.disable_cap_level = 100; | |
1349 | } | |
6eaf8740 | 1350 | } else if (di->bat_cap.prev_percent != percent) { |
13151631 AM |
1351 | dev_dbg(di->dev, |
1352 | "battery reported full " | |
1353 | "but capacity dropping: %d\n", | |
6eaf8740 | 1354 | percent); |
1355 | di->bat_cap.prev_percent = percent; | |
13151631 AM |
1356 | di->bat_cap.prev_mah = di->bat_cap.mah; |
1357 | ||
1358 | changed = true; | |
1359 | } | |
6eaf8740 | 1360 | } else if (di->bat_cap.prev_percent != percent) { |
1361 | if (percent == 0) { | |
13151631 AM |
1362 | /* |
1363 | * We will not report 0% unless we've got | |
1364 | * the LOW_BAT IRQ, no matter what the FG | |
1365 | * algorithm says. | |
1366 | */ | |
1367 | di->bat_cap.prev_percent = 1; | |
6eaf8740 | 1368 | percent = 1; |
13151631 AM |
1369 | |
1370 | changed = true; | |
1371 | } else if (!(!di->flags.charging && | |
6eaf8740 | 1372 | percent > di->bat_cap.prev_percent) || init) { |
13151631 AM |
1373 | /* |
1374 | * We do not allow reported capacity to go up | |
1375 | * unless we're charging or if we're in init | |
1376 | */ | |
1377 | dev_dbg(di->dev, | |
1378 | "capacity changed from %d to %d (%d)\n", | |
1379 | di->bat_cap.prev_percent, | |
6eaf8740 | 1380 | percent, |
13151631 | 1381 | di->bat_cap.permille); |
6eaf8740 | 1382 | di->bat_cap.prev_percent = percent; |
13151631 AM |
1383 | di->bat_cap.prev_mah = di->bat_cap.mah; |
1384 | ||
1385 | changed = true; | |
1386 | } else { | |
1387 | dev_dbg(di->dev, "capacity not allowed to go up since " | |
1388 | "no charger is connected: %d to %d (%d)\n", | |
1389 | di->bat_cap.prev_percent, | |
6eaf8740 | 1390 | percent, |
13151631 AM |
1391 | di->bat_cap.permille); |
1392 | } | |
1393 | } | |
1394 | ||
1395 | if (changed) { | |
ea402401 MC |
1396 | if (di->bm->capacity_scaling) { |
1397 | di->bat_cap.cap_scale.scaled_cap = | |
1398 | ab8500_fg_calculate_scaled_capacity(di); | |
1399 | ||
1400 | dev_info(di->dev, "capacity=%d (%d)\n", | |
1401 | di->bat_cap.prev_percent, | |
1402 | di->bat_cap.cap_scale.scaled_cap); | |
1403 | } | |
297d716f | 1404 | power_supply_changed(di->fg_psy); |
13151631 AM |
1405 | if (di->flags.fully_charged && di->flags.force_full) { |
1406 | dev_dbg(di->dev, "Battery full, notifying.\n"); | |
1407 | di->flags.force_full = false; | |
1408 | sysfs_notify(&di->fg_kobject, NULL, "charge_full"); | |
1409 | } | |
1410 | sysfs_notify(&di->fg_kobject, NULL, "charge_now"); | |
1411 | } | |
1412 | } | |
1413 | ||
1414 | static void ab8500_fg_charge_state_to(struct ab8500_fg *di, | |
1415 | enum ab8500_fg_charge_state new_state) | |
1416 | { | |
1417 | dev_dbg(di->dev, "Charge state from %d [%s] to %d [%s]\n", | |
1418 | di->charge_state, | |
1419 | charge_state[di->charge_state], | |
1420 | new_state, | |
1421 | charge_state[new_state]); | |
1422 | ||
1423 | di->charge_state = new_state; | |
1424 | } | |
1425 | ||
1426 | static void ab8500_fg_discharge_state_to(struct ab8500_fg *di, | |
0fff22ee | 1427 | enum ab8500_fg_discharge_state new_state) |
13151631 | 1428 | { |
8c2fac99 | 1429 | dev_dbg(di->dev, "Discharge state from %d [%s] to %d [%s]\n", |
13151631 AM |
1430 | di->discharge_state, |
1431 | discharge_state[di->discharge_state], | |
1432 | new_state, | |
1433 | discharge_state[new_state]); | |
1434 | ||
1435 | di->discharge_state = new_state; | |
1436 | } | |
1437 | ||
1438 | /** | |
1439 | * ab8500_fg_algorithm_charging() - FG algorithm for when charging | |
1440 | * @di: pointer to the ab8500_fg structure | |
1441 | * | |
1442 | * Battery capacity calculation state machine for when we're charging | |
1443 | */ | |
1444 | static void ab8500_fg_algorithm_charging(struct ab8500_fg *di) | |
1445 | { | |
1446 | /* | |
1447 | * If we change to discharge mode | |
1448 | * we should start with recovery | |
1449 | */ | |
1450 | if (di->discharge_state != AB8500_FG_DISCHARGE_INIT_RECOVERY) | |
1451 | ab8500_fg_discharge_state_to(di, | |
1452 | AB8500_FG_DISCHARGE_INIT_RECOVERY); | |
1453 | ||
1454 | switch (di->charge_state) { | |
1455 | case AB8500_FG_CHARGE_INIT: | |
1456 | di->fg_samples = SEC_TO_SAMPLE( | |
b0284de0 | 1457 | di->bm->fg_params->accu_charging); |
13151631 AM |
1458 | |
1459 | ab8500_fg_coulomb_counter(di, true); | |
1460 | ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_READOUT); | |
1461 | ||
1462 | break; | |
1463 | ||
1464 | case AB8500_FG_CHARGE_READOUT: | |
1465 | /* | |
1466 | * Read the FG and calculate the new capacity | |
1467 | */ | |
1468 | mutex_lock(&di->cc_lock); | |
ea402401 | 1469 | if (!di->flags.conv_done && !di->flags.force_full) { |
13151631 AM |
1470 | /* Wasn't the CC IRQ that got us here */ |
1471 | mutex_unlock(&di->cc_lock); | |
1472 | dev_dbg(di->dev, "%s CC conv not done\n", | |
1473 | __func__); | |
1474 | ||
1475 | break; | |
1476 | } | |
1477 | di->flags.conv_done = false; | |
1478 | mutex_unlock(&di->cc_lock); | |
1479 | ||
1480 | ab8500_fg_calc_cap_charging(di); | |
1481 | ||
1482 | break; | |
1483 | ||
1484 | default: | |
1485 | break; | |
1486 | } | |
1487 | ||
1488 | /* Check capacity limits */ | |
1489 | ab8500_fg_check_capacity_limits(di, false); | |
1490 | } | |
1491 | ||
1492 | static void force_capacity(struct ab8500_fg *di) | |
1493 | { | |
1494 | int cap; | |
1495 | ||
1496 | ab8500_fg_clear_cap_samples(di); | |
1497 | cap = di->bat_cap.user_mah; | |
1498 | if (cap > di->bat_cap.max_mah_design) { | |
1499 | dev_dbg(di->dev, "Remaining cap %d can't be bigger than total" | |
1500 | " %d\n", cap, di->bat_cap.max_mah_design); | |
1501 | cap = di->bat_cap.max_mah_design; | |
1502 | } | |
1503 | ab8500_fg_fill_cap_sample(di, di->bat_cap.user_mah); | |
1504 | di->bat_cap.permille = ab8500_fg_convert_mah_to_permille(di, cap); | |
1505 | di->bat_cap.mah = cap; | |
1506 | ab8500_fg_check_capacity_limits(di, true); | |
1507 | } | |
1508 | ||
1509 | static bool check_sysfs_capacity(struct ab8500_fg *di) | |
1510 | { | |
1511 | int cap, lower, upper; | |
1512 | int cap_permille; | |
1513 | ||
1514 | cap = di->bat_cap.user_mah; | |
1515 | ||
1516 | cap_permille = ab8500_fg_convert_mah_to_permille(di, | |
1517 | di->bat_cap.user_mah); | |
1518 | ||
b0284de0 LJ |
1519 | lower = di->bat_cap.permille - di->bm->fg_params->user_cap_limit * 10; |
1520 | upper = di->bat_cap.permille + di->bm->fg_params->user_cap_limit * 10; | |
13151631 AM |
1521 | |
1522 | if (lower < 0) | |
1523 | lower = 0; | |
1524 | /* 1000 is permille, -> 100 percent */ | |
1525 | if (upper > 1000) | |
1526 | upper = 1000; | |
1527 | ||
1528 | dev_dbg(di->dev, "Capacity limits:" | |
1529 | " (Lower: %d User: %d Upper: %d) [user: %d, was: %d]\n", | |
1530 | lower, cap_permille, upper, cap, di->bat_cap.mah); | |
1531 | ||
1532 | /* If within limits, use the saved capacity and exit estimation...*/ | |
1533 | if (cap_permille > lower && cap_permille < upper) { | |
1534 | dev_dbg(di->dev, "OK! Using users cap %d uAh now\n", cap); | |
1535 | force_capacity(di); | |
1536 | return true; | |
1537 | } | |
1538 | dev_dbg(di->dev, "Capacity from user out of limits, ignoring"); | |
1539 | return false; | |
1540 | } | |
1541 | ||
1542 | /** | |
1543 | * ab8500_fg_algorithm_discharging() - FG algorithm for when discharging | |
1544 | * @di: pointer to the ab8500_fg structure | |
1545 | * | |
1546 | * Battery capacity calculation state machine for when we're discharging | |
1547 | */ | |
1548 | static void ab8500_fg_algorithm_discharging(struct ab8500_fg *di) | |
1549 | { | |
1550 | int sleep_time; | |
1551 | ||
1552 | /* If we change to charge mode we should start with init */ | |
1553 | if (di->charge_state != AB8500_FG_CHARGE_INIT) | |
1554 | ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT); | |
1555 | ||
1556 | switch (di->discharge_state) { | |
1557 | case AB8500_FG_DISCHARGE_INIT: | |
1558 | /* We use the FG IRQ to work on */ | |
1559 | di->init_cnt = 0; | |
b0284de0 | 1560 | di->fg_samples = SEC_TO_SAMPLE(di->bm->fg_params->init_timer); |
13151631 AM |
1561 | ab8500_fg_coulomb_counter(di, true); |
1562 | ab8500_fg_discharge_state_to(di, | |
1563 | AB8500_FG_DISCHARGE_INITMEASURING); | |
1564 | ||
df561f66 | 1565 | fallthrough; |
13151631 AM |
1566 | case AB8500_FG_DISCHARGE_INITMEASURING: |
1567 | /* | |
1568 | * Discard a number of samples during startup. | |
1569 | * After that, use compensated voltage for a few | |
1570 | * samples to get an initial capacity. | |
1571 | * Then go to READOUT | |
1572 | */ | |
b0284de0 | 1573 | sleep_time = di->bm->fg_params->init_timer; |
13151631 AM |
1574 | |
1575 | /* Discard the first [x] seconds */ | |
b0284de0 | 1576 | if (di->init_cnt > di->bm->fg_params->init_discard_time) { |
3bab7363 | 1577 | ab8500_fg_calc_cap_discharge_voltage(di); |
13151631 AM |
1578 | |
1579 | ab8500_fg_check_capacity_limits(di, true); | |
1580 | } | |
1581 | ||
1582 | di->init_cnt += sleep_time; | |
b0284de0 | 1583 | if (di->init_cnt > di->bm->fg_params->init_total_time) |
13151631 AM |
1584 | ab8500_fg_discharge_state_to(di, |
1585 | AB8500_FG_DISCHARGE_READOUT_INIT); | |
1586 | ||
1587 | break; | |
1588 | ||
1589 | case AB8500_FG_DISCHARGE_INIT_RECOVERY: | |
1590 | di->recovery_cnt = 0; | |
1591 | di->recovery_needed = true; | |
1592 | ab8500_fg_discharge_state_to(di, | |
1593 | AB8500_FG_DISCHARGE_RECOVERY); | |
1594 | ||
df561f66 | 1595 | fallthrough; |
13151631 AM |
1596 | |
1597 | case AB8500_FG_DISCHARGE_RECOVERY: | |
b0284de0 | 1598 | sleep_time = di->bm->fg_params->recovery_sleep_timer; |
13151631 AM |
1599 | |
1600 | /* | |
1601 | * We should check the power consumption | |
1602 | * If low, go to READOUT (after x min) or | |
1603 | * RECOVERY_SLEEP if time left. | |
1604 | * If high, go to READOUT | |
1605 | */ | |
0525f34d | 1606 | di->inst_curr_ua = ab8500_fg_inst_curr_blocking(di); |
13151631 | 1607 | |
0525f34d | 1608 | if (ab8500_fg_is_low_curr(di, di->inst_curr_ua)) { |
13151631 | 1609 | if (di->recovery_cnt > |
b0284de0 | 1610 | di->bm->fg_params->recovery_total_time) { |
13151631 | 1611 | di->fg_samples = SEC_TO_SAMPLE( |
b0284de0 | 1612 | di->bm->fg_params->accu_high_curr); |
13151631 AM |
1613 | ab8500_fg_coulomb_counter(di, true); |
1614 | ab8500_fg_discharge_state_to(di, | |
1615 | AB8500_FG_DISCHARGE_READOUT); | |
1616 | di->recovery_needed = false; | |
1617 | } else { | |
1618 | queue_delayed_work(di->fg_wq, | |
1619 | &di->fg_periodic_work, | |
1620 | sleep_time * HZ); | |
1621 | } | |
1622 | di->recovery_cnt += sleep_time; | |
1623 | } else { | |
1624 | di->fg_samples = SEC_TO_SAMPLE( | |
b0284de0 | 1625 | di->bm->fg_params->accu_high_curr); |
13151631 AM |
1626 | ab8500_fg_coulomb_counter(di, true); |
1627 | ab8500_fg_discharge_state_to(di, | |
1628 | AB8500_FG_DISCHARGE_READOUT); | |
1629 | } | |
1630 | break; | |
1631 | ||
1632 | case AB8500_FG_DISCHARGE_READOUT_INIT: | |
1633 | di->fg_samples = SEC_TO_SAMPLE( | |
b0284de0 | 1634 | di->bm->fg_params->accu_high_curr); |
13151631 AM |
1635 | ab8500_fg_coulomb_counter(di, true); |
1636 | ab8500_fg_discharge_state_to(di, | |
1637 | AB8500_FG_DISCHARGE_READOUT); | |
1638 | break; | |
1639 | ||
1640 | case AB8500_FG_DISCHARGE_READOUT: | |
0525f34d | 1641 | di->inst_curr_ua = ab8500_fg_inst_curr_blocking(di); |
13151631 | 1642 | |
0525f34d | 1643 | if (ab8500_fg_is_low_curr(di, di->inst_curr_ua)) { |
13151631 AM |
1644 | /* Detect mode change */ |
1645 | if (di->high_curr_mode) { | |
1646 | di->high_curr_mode = false; | |
1647 | di->high_curr_cnt = 0; | |
1648 | } | |
1649 | ||
1650 | if (di->recovery_needed) { | |
1651 | ab8500_fg_discharge_state_to(di, | |
ffaa39d9 | 1652 | AB8500_FG_DISCHARGE_INIT_RECOVERY); |
13151631 AM |
1653 | |
1654 | queue_delayed_work(di->fg_wq, | |
1655 | &di->fg_periodic_work, 0); | |
1656 | ||
1657 | break; | |
1658 | } | |
1659 | ||
3bab7363 | 1660 | ab8500_fg_calc_cap_discharge_voltage(di); |
13151631 AM |
1661 | } else { |
1662 | mutex_lock(&di->cc_lock); | |
1663 | if (!di->flags.conv_done) { | |
1664 | /* Wasn't the CC IRQ that got us here */ | |
1665 | mutex_unlock(&di->cc_lock); | |
1666 | dev_dbg(di->dev, "%s CC conv not done\n", | |
1667 | __func__); | |
1668 | ||
1669 | break; | |
1670 | } | |
1671 | di->flags.conv_done = false; | |
1672 | mutex_unlock(&di->cc_lock); | |
1673 | ||
1674 | /* Detect mode change */ | |
1675 | if (!di->high_curr_mode) { | |
1676 | di->high_curr_mode = true; | |
1677 | di->high_curr_cnt = 0; | |
1678 | } | |
1679 | ||
1680 | di->high_curr_cnt += | |
b0284de0 | 1681 | di->bm->fg_params->accu_high_curr; |
13151631 | 1682 | if (di->high_curr_cnt > |
b0284de0 | 1683 | di->bm->fg_params->high_curr_time) |
13151631 AM |
1684 | di->recovery_needed = true; |
1685 | ||
1686 | ab8500_fg_calc_cap_discharge_fg(di); | |
1687 | } | |
1688 | ||
1689 | ab8500_fg_check_capacity_limits(di, false); | |
1690 | ||
1691 | break; | |
1692 | ||
1693 | case AB8500_FG_DISCHARGE_WAKEUP: | |
3bab7363 | 1694 | ab8500_fg_calc_cap_discharge_voltage(di); |
13151631 AM |
1695 | |
1696 | di->fg_samples = SEC_TO_SAMPLE( | |
b0284de0 | 1697 | di->bm->fg_params->accu_high_curr); |
13151631 AM |
1698 | ab8500_fg_coulomb_counter(di, true); |
1699 | ab8500_fg_discharge_state_to(di, | |
1700 | AB8500_FG_DISCHARGE_READOUT); | |
1701 | ||
1702 | ab8500_fg_check_capacity_limits(di, false); | |
1703 | ||
1704 | break; | |
1705 | ||
1706 | default: | |
1707 | break; | |
1708 | } | |
1709 | } | |
1710 | ||
1711 | /** | |
1712 | * ab8500_fg_algorithm_calibrate() - Internal columb counter offset calibration | |
1713 | * @di: pointer to the ab8500_fg structure | |
1714 | * | |
1715 | */ | |
1716 | static void ab8500_fg_algorithm_calibrate(struct ab8500_fg *di) | |
1717 | { | |
1718 | int ret; | |
1719 | ||
1720 | switch (di->calib_state) { | |
1721 | case AB8500_FG_CALIB_INIT: | |
1722 | dev_dbg(di->dev, "Calibration ongoing...\n"); | |
1723 | ||
1724 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1725 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
1726 | CC_INT_CAL_N_AVG_MASK, CC_INT_CAL_SAMPLES_8); | |
1727 | if (ret < 0) | |
1728 | goto err; | |
1729 | ||
1730 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1731 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
1732 | CC_INTAVGOFFSET_ENA, CC_INTAVGOFFSET_ENA); | |
1733 | if (ret < 0) | |
1734 | goto err; | |
1735 | di->calib_state = AB8500_FG_CALIB_WAIT; | |
1736 | break; | |
1737 | case AB8500_FG_CALIB_END: | |
1738 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1739 | AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, | |
1740 | CC_MUXOFFSET, CC_MUXOFFSET); | |
1741 | if (ret < 0) | |
1742 | goto err; | |
1743 | di->flags.calibrate = false; | |
1744 | dev_dbg(di->dev, "Calibration done...\n"); | |
1745 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
1746 | break; | |
1747 | case AB8500_FG_CALIB_WAIT: | |
1748 | dev_dbg(di->dev, "Calibration WFI\n"); | |
b51883d4 | 1749 | break; |
13151631 AM |
1750 | default: |
1751 | break; | |
1752 | } | |
1753 | return; | |
1754 | err: | |
1755 | /* Something went wrong, don't calibrate then */ | |
1756 | dev_err(di->dev, "failed to calibrate the CC\n"); | |
1757 | di->flags.calibrate = false; | |
1758 | di->calib_state = AB8500_FG_CALIB_INIT; | |
1759 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
1760 | } | |
1761 | ||
1762 | /** | |
1763 | * ab8500_fg_algorithm() - Entry point for the FG algorithm | |
1764 | * @di: pointer to the ab8500_fg structure | |
1765 | * | |
1766 | * Entry point for the battery capacity calculation state machine | |
1767 | */ | |
1768 | static void ab8500_fg_algorithm(struct ab8500_fg *di) | |
1769 | { | |
1770 | if (di->flags.calibrate) | |
1771 | ab8500_fg_algorithm_calibrate(di); | |
1772 | else { | |
1773 | if (di->flags.charging) | |
1774 | ab8500_fg_algorithm_charging(di); | |
1775 | else | |
1776 | ab8500_fg_algorithm_discharging(di); | |
1777 | } | |
1778 | ||
64277618 | 1779 | dev_dbg(di->dev, "[FG_DATA] %d %d %d %d %d %d %d %d %d %d " |
13151631 AM |
1780 | "%d %d %d %d %d %d %d\n", |
1781 | di->bat_cap.max_mah_design, | |
64277618 | 1782 | di->bat_cap.max_mah, |
13151631 AM |
1783 | di->bat_cap.mah, |
1784 | di->bat_cap.permille, | |
1785 | di->bat_cap.level, | |
1786 | di->bat_cap.prev_mah, | |
1787 | di->bat_cap.prev_percent, | |
1788 | di->bat_cap.prev_level, | |
0525f34d LW |
1789 | di->vbat_uv, |
1790 | di->inst_curr_ua, | |
1791 | di->avg_curr_ua, | |
13151631 AM |
1792 | di->accu_charge, |
1793 | di->flags.charging, | |
1794 | di->charge_state, | |
1795 | di->discharge_state, | |
1796 | di->high_curr_mode, | |
1797 | di->recovery_needed); | |
1798 | } | |
1799 | ||
1800 | /** | |
1801 | * ab8500_fg_periodic_work() - Run the FG state machine periodically | |
1802 | * @work: pointer to the work_struct structure | |
1803 | * | |
1804 | * Work queue function for periodic work | |
1805 | */ | |
1806 | static void ab8500_fg_periodic_work(struct work_struct *work) | |
1807 | { | |
1808 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, | |
1809 | fg_periodic_work.work); | |
1810 | ||
1811 | if (di->init_capacity) { | |
13151631 | 1812 | /* Get an initial capacity calculation */ |
3bab7363 | 1813 | ab8500_fg_calc_cap_discharge_voltage(di); |
13151631 AM |
1814 | ab8500_fg_check_capacity_limits(di, true); |
1815 | di->init_capacity = false; | |
1816 | ||
1817 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
1818 | } else if (di->flags.user_cap) { | |
1819 | if (check_sysfs_capacity(di)) { | |
1820 | ab8500_fg_check_capacity_limits(di, true); | |
1821 | if (di->flags.charging) | |
1822 | ab8500_fg_charge_state_to(di, | |
1823 | AB8500_FG_CHARGE_INIT); | |
1824 | else | |
1825 | ab8500_fg_discharge_state_to(di, | |
1826 | AB8500_FG_DISCHARGE_READOUT_INIT); | |
1827 | } | |
1828 | di->flags.user_cap = false; | |
1829 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
1830 | } else | |
1831 | ab8500_fg_algorithm(di); | |
1832 | ||
1833 | } | |
1834 | ||
1835 | /** | |
1836 | * ab8500_fg_check_hw_failure_work() - Check OVV_BAT condition | |
1837 | * @work: pointer to the work_struct structure | |
1838 | * | |
1839 | * Work queue function for checking the OVV_BAT condition | |
1840 | */ | |
1841 | static void ab8500_fg_check_hw_failure_work(struct work_struct *work) | |
1842 | { | |
1843 | int ret; | |
1844 | u8 reg_value; | |
1845 | ||
1846 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, | |
1847 | fg_check_hw_failure_work.work); | |
1848 | ||
1849 | /* | |
1850 | * If we have had a battery over-voltage situation, | |
1851 | * check ovv-bit to see if it should be reset. | |
1852 | */ | |
8bcf3b39 HB |
1853 | ret = abx500_get_register_interruptible(di->dev, |
1854 | AB8500_CHARGER, AB8500_CH_STAT_REG, | |
1855 | ®_value); | |
1856 | if (ret < 0) { | |
1857 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
1858 | return; | |
1859 | } | |
1860 | if ((reg_value & BATT_OVV) == BATT_OVV) { | |
1861 | if (!di->flags.bat_ovv) { | |
1862 | dev_dbg(di->dev, "Battery OVV\n"); | |
1863 | di->flags.bat_ovv = true; | |
297d716f | 1864 | power_supply_changed(di->fg_psy); |
13151631 | 1865 | } |
13151631 AM |
1866 | /* Not yet recovered from ovv, reschedule this test */ |
1867 | queue_delayed_work(di->fg_wq, &di->fg_check_hw_failure_work, | |
41ce2565 | 1868 | HZ); |
8bcf3b39 HB |
1869 | } else { |
1870 | dev_dbg(di->dev, "Battery recovered from OVV\n"); | |
1871 | di->flags.bat_ovv = false; | |
297d716f | 1872 | power_supply_changed(di->fg_psy); |
13151631 AM |
1873 | } |
1874 | } | |
1875 | ||
1876 | /** | |
1877 | * ab8500_fg_low_bat_work() - Check LOW_BAT condition | |
1878 | * @work: pointer to the work_struct structure | |
1879 | * | |
1880 | * Work queue function for checking the LOW_BAT condition | |
1881 | */ | |
1882 | static void ab8500_fg_low_bat_work(struct work_struct *work) | |
1883 | { | |
0525f34d | 1884 | int vbat_uv; |
13151631 AM |
1885 | |
1886 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, | |
1887 | fg_low_bat_work.work); | |
1888 | ||
0525f34d | 1889 | vbat_uv = ab8500_fg_bat_voltage(di); |
13151631 AM |
1890 | |
1891 | /* Check if LOW_BAT still fulfilled */ | |
0525f34d | 1892 | if (vbat_uv < di->bm->fg_params->lowbat_threshold_uv) { |
75f2a219 HB |
1893 | /* Is it time to shut down? */ |
1894 | if (di->low_bat_cnt < 1) { | |
1895 | di->flags.low_bat = true; | |
1896 | dev_warn(di->dev, "Shut down pending...\n"); | |
1897 | } else { | |
1898 | /* | |
1899 | * Else we need to re-schedule this check to be able to detect | |
1900 | * if the voltage increases again during charging or | |
1901 | * due to decreasing load. | |
1902 | */ | |
1903 | di->low_bat_cnt--; | |
1904 | dev_warn(di->dev, "Battery voltage still LOW\n"); | |
1905 | queue_delayed_work(di->fg_wq, &di->fg_low_bat_work, | |
1906 | round_jiffies(LOW_BAT_CHECK_INTERVAL)); | |
1907 | } | |
13151631 | 1908 | } else { |
75f2a219 HB |
1909 | di->flags.low_bat_delay = false; |
1910 | di->low_bat_cnt = 10; | |
13151631 AM |
1911 | dev_warn(di->dev, "Battery voltage OK again\n"); |
1912 | } | |
1913 | ||
1914 | /* This is needed to dispatch LOW_BAT */ | |
1915 | ab8500_fg_check_capacity_limits(di, false); | |
13151631 AM |
1916 | } |
1917 | ||
1918 | /** | |
1919 | * ab8500_fg_battok_calc - calculate the bit pattern corresponding | |
1920 | * to the target voltage. | |
1921 | * @di: pointer to the ab8500_fg structure | |
32c52eff | 1922 | * @target: target voltage |
13151631 AM |
1923 | * |
1924 | * Returns bit pattern closest to the target voltage | |
1925 | * valid return values are 0-14. (0-BATT_OK_MAX_NR_INCREMENTS) | |
1926 | */ | |
1927 | ||
1928 | static int ab8500_fg_battok_calc(struct ab8500_fg *di, int target) | |
1929 | { | |
1930 | if (target > BATT_OK_MIN + | |
1931 | (BATT_OK_INCREMENT * BATT_OK_MAX_NR_INCREMENTS)) | |
1932 | return BATT_OK_MAX_NR_INCREMENTS; | |
1933 | if (target < BATT_OK_MIN) | |
1934 | return 0; | |
1935 | return (target - BATT_OK_MIN) / BATT_OK_INCREMENT; | |
1936 | } | |
1937 | ||
1938 | /** | |
1939 | * ab8500_fg_battok_init_hw_register - init battok levels | |
1940 | * @di: pointer to the ab8500_fg structure | |
1941 | * | |
1942 | */ | |
1943 | ||
1944 | static int ab8500_fg_battok_init_hw_register(struct ab8500_fg *di) | |
1945 | { | |
1946 | int selected; | |
1947 | int sel0; | |
1948 | int sel1; | |
1949 | int cbp_sel0; | |
1950 | int cbp_sel1; | |
1951 | int ret; | |
1952 | int new_val; | |
1953 | ||
b0284de0 LJ |
1954 | sel0 = di->bm->fg_params->battok_falling_th_sel0; |
1955 | sel1 = di->bm->fg_params->battok_raising_th_sel1; | |
13151631 AM |
1956 | |
1957 | cbp_sel0 = ab8500_fg_battok_calc(di, sel0); | |
1958 | cbp_sel1 = ab8500_fg_battok_calc(di, sel1); | |
1959 | ||
1960 | selected = BATT_OK_MIN + cbp_sel0 * BATT_OK_INCREMENT; | |
1961 | ||
1962 | if (selected != sel0) | |
1963 | dev_warn(di->dev, "Invalid voltage step:%d, using %d %d\n", | |
1964 | sel0, selected, cbp_sel0); | |
1965 | ||
1966 | selected = BATT_OK_MIN + cbp_sel1 * BATT_OK_INCREMENT; | |
1967 | ||
1968 | if (selected != sel1) | |
1969 | dev_warn(di->dev, "Invalid voltage step:%d, using %d %d\n", | |
1970 | sel1, selected, cbp_sel1); | |
1971 | ||
1972 | new_val = cbp_sel0 | (cbp_sel1 << 4); | |
1973 | ||
1974 | dev_dbg(di->dev, "using: %x %d %d\n", new_val, cbp_sel0, cbp_sel1); | |
1975 | ret = abx500_set_register_interruptible(di->dev, AB8500_SYS_CTRL2_BLOCK, | |
1976 | AB8500_BATT_OK_REG, new_val); | |
1977 | return ret; | |
1978 | } | |
1979 | ||
1980 | /** | |
1981 | * ab8500_fg_instant_work() - Run the FG state machine instantly | |
1982 | * @work: pointer to the work_struct structure | |
1983 | * | |
1984 | * Work queue function for instant work | |
1985 | */ | |
1986 | static void ab8500_fg_instant_work(struct work_struct *work) | |
1987 | { | |
1988 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, fg_work); | |
1989 | ||
1990 | ab8500_fg_algorithm(di); | |
1991 | } | |
1992 | ||
1993 | /** | |
7a2cf9ba | 1994 | * ab8500_fg_cc_data_end_handler() - end of data conversion isr. |
13151631 AM |
1995 | * @irq: interrupt number |
1996 | * @_di: pointer to the ab8500_fg structure | |
1997 | * | |
1998 | * Returns IRQ status(IRQ_HANDLED) | |
1999 | */ | |
2000 | static irqreturn_t ab8500_fg_cc_data_end_handler(int irq, void *_di) | |
2001 | { | |
2002 | struct ab8500_fg *di = _di; | |
3988a4df JB |
2003 | if (!di->nbr_cceoc_irq_cnt) { |
2004 | di->nbr_cceoc_irq_cnt++; | |
2005 | complete(&di->ab8500_fg_started); | |
2006 | } else { | |
2007 | di->nbr_cceoc_irq_cnt = 0; | |
2008 | complete(&di->ab8500_fg_complete); | |
2009 | } | |
13151631 AM |
2010 | return IRQ_HANDLED; |
2011 | } | |
2012 | ||
2013 | /** | |
7a2cf9ba | 2014 | * ab8500_fg_cc_int_calib_handler () - end of calibration isr. |
13151631 AM |
2015 | * @irq: interrupt number |
2016 | * @_di: pointer to the ab8500_fg structure | |
2017 | * | |
2018 | * Returns IRQ status(IRQ_HANDLED) | |
2019 | */ | |
2020 | static irqreturn_t ab8500_fg_cc_int_calib_handler(int irq, void *_di) | |
2021 | { | |
2022 | struct ab8500_fg *di = _di; | |
2023 | di->calib_state = AB8500_FG_CALIB_END; | |
2024 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
2025 | return IRQ_HANDLED; | |
2026 | } | |
2027 | ||
2028 | /** | |
2029 | * ab8500_fg_cc_convend_handler() - isr to get battery avg current. | |
2030 | * @irq: interrupt number | |
2031 | * @_di: pointer to the ab8500_fg structure | |
2032 | * | |
2033 | * Returns IRQ status(IRQ_HANDLED) | |
2034 | */ | |
2035 | static irqreturn_t ab8500_fg_cc_convend_handler(int irq, void *_di) | |
2036 | { | |
2037 | struct ab8500_fg *di = _di; | |
2038 | ||
2039 | queue_work(di->fg_wq, &di->fg_acc_cur_work); | |
2040 | ||
2041 | return IRQ_HANDLED; | |
2042 | } | |
2043 | ||
2044 | /** | |
2045 | * ab8500_fg_batt_ovv_handler() - Battery OVV occured | |
2046 | * @irq: interrupt number | |
2047 | * @_di: pointer to the ab8500_fg structure | |
2048 | * | |
2049 | * Returns IRQ status(IRQ_HANDLED) | |
2050 | */ | |
2051 | static irqreturn_t ab8500_fg_batt_ovv_handler(int irq, void *_di) | |
2052 | { | |
2053 | struct ab8500_fg *di = _di; | |
2054 | ||
2055 | dev_dbg(di->dev, "Battery OVV\n"); | |
13151631 AM |
2056 | |
2057 | /* Schedule a new HW failure check */ | |
2058 | queue_delayed_work(di->fg_wq, &di->fg_check_hw_failure_work, 0); | |
2059 | ||
2060 | return IRQ_HANDLED; | |
2061 | } | |
2062 | ||
2063 | /** | |
2064 | * ab8500_fg_lowbatf_handler() - Battery voltage is below LOW threshold | |
2065 | * @irq: interrupt number | |
2066 | * @_di: pointer to the ab8500_fg structure | |
2067 | * | |
2068 | * Returns IRQ status(IRQ_HANDLED) | |
2069 | */ | |
2070 | static irqreturn_t ab8500_fg_lowbatf_handler(int irq, void *_di) | |
2071 | { | |
2072 | struct ab8500_fg *di = _di; | |
2073 | ||
75f2a219 | 2074 | /* Initiate handling in ab8500_fg_low_bat_work() if not already initiated. */ |
13151631 AM |
2075 | if (!di->flags.low_bat_delay) { |
2076 | dev_warn(di->dev, "Battery voltage is below LOW threshold\n"); | |
2077 | di->flags.low_bat_delay = true; | |
2078 | /* | |
2079 | * Start a timer to check LOW_BAT again after some time | |
2080 | * This is done to avoid shutdown on single voltage dips | |
2081 | */ | |
2082 | queue_delayed_work(di->fg_wq, &di->fg_low_bat_work, | |
2083 | round_jiffies(LOW_BAT_CHECK_INTERVAL)); | |
2084 | } | |
2085 | return IRQ_HANDLED; | |
2086 | } | |
2087 | ||
2088 | /** | |
2089 | * ab8500_fg_get_property() - get the fg properties | |
2090 | * @psy: pointer to the power_supply structure | |
2091 | * @psp: pointer to the power_supply_property structure | |
2092 | * @val: pointer to the power_supply_propval union | |
2093 | * | |
2094 | * This function gets called when an application tries to get the | |
2095 | * fg properties by reading the sysfs files. | |
2096 | * voltage_now: battery voltage | |
2097 | * current_now: battery instant current | |
2098 | * current_avg: battery average current | |
2099 | * charge_full_design: capacity where battery is considered full | |
2100 | * charge_now: battery capacity in nAh | |
2101 | * capacity: capacity in percent | |
2102 | * capacity_level: capacity level | |
2103 | * | |
2104 | * Returns error code in case of failure else 0 on success | |
2105 | */ | |
2106 | static int ab8500_fg_get_property(struct power_supply *psy, | |
2107 | enum power_supply_property psp, | |
2108 | union power_supply_propval *val) | |
2109 | { | |
297d716f | 2110 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
13151631 AM |
2111 | |
2112 | /* | |
2113 | * If battery is identified as unknown and charging of unknown | |
2114 | * batteries is disabled, we always report 100% capacity and | |
2115 | * capacity level UNKNOWN, since we can't calculate | |
2116 | * remaining capacity | |
2117 | */ | |
2118 | ||
2119 | switch (psp) { | |
2120 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
2121 | if (di->flags.bat_ovv) | |
0525f34d | 2122 | val->intval = BATT_OVV_VALUE; |
13151631 | 2123 | else |
0525f34d | 2124 | val->intval = di->vbat_uv; |
13151631 AM |
2125 | break; |
2126 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
0525f34d | 2127 | val->intval = di->inst_curr_ua; |
13151631 AM |
2128 | break; |
2129 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
0525f34d | 2130 | val->intval = di->avg_curr_ua; |
13151631 AM |
2131 | break; |
2132 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
2133 | val->intval = ab8500_fg_convert_mah_to_uwh(di, | |
2134 | di->bat_cap.max_mah_design); | |
2135 | break; | |
2136 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
2137 | val->intval = ab8500_fg_convert_mah_to_uwh(di, | |
2138 | di->bat_cap.max_mah); | |
2139 | break; | |
2140 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
b0284de0 | 2141 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
13151631 AM |
2142 | di->flags.batt_id_received) |
2143 | val->intval = ab8500_fg_convert_mah_to_uwh(di, | |
2144 | di->bat_cap.max_mah); | |
2145 | else | |
2146 | val->intval = ab8500_fg_convert_mah_to_uwh(di, | |
2147 | di->bat_cap.prev_mah); | |
2148 | break; | |
2149 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
2150 | val->intval = di->bat_cap.max_mah_design; | |
2151 | break; | |
2152 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
2153 | val->intval = di->bat_cap.max_mah; | |
2154 | break; | |
2155 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
b0284de0 | 2156 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
13151631 AM |
2157 | di->flags.batt_id_received) |
2158 | val->intval = di->bat_cap.max_mah; | |
2159 | else | |
2160 | val->intval = di->bat_cap.prev_mah; | |
2161 | break; | |
2162 | case POWER_SUPPLY_PROP_CAPACITY: | |
e82c5bdb | 2163 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
13151631 AM |
2164 | di->flags.batt_id_received) |
2165 | val->intval = 100; | |
2166 | else | |
2167 | val->intval = di->bat_cap.prev_percent; | |
2168 | break; | |
2169 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: | |
b0284de0 | 2170 | if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && |
13151631 AM |
2171 | di->flags.batt_id_received) |
2172 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN; | |
2173 | else | |
2174 | val->intval = di->bat_cap.prev_level; | |
2175 | break; | |
2176 | default: | |
2177 | return -EINVAL; | |
2178 | } | |
2179 | return 0; | |
2180 | } | |
2181 | ||
2182 | static int ab8500_fg_get_ext_psy_data(struct device *dev, void *data) | |
2183 | { | |
2184 | struct power_supply *psy; | |
ea32cea1 AS |
2185 | struct power_supply *ext = dev_get_drvdata(dev); |
2186 | const char **supplicants = (const char **)ext->supplied_to; | |
13151631 | 2187 | struct ab8500_fg *di; |
25fd3303 | 2188 | struct power_supply_battery_info *bi; |
13151631 | 2189 | union power_supply_propval ret; |
ea32cea1 | 2190 | int j; |
13151631 AM |
2191 | |
2192 | psy = (struct power_supply *)data; | |
297d716f | 2193 | di = power_supply_get_drvdata(psy); |
25fd3303 | 2194 | bi = di->bm->bi; |
13151631 AM |
2195 | |
2196 | /* | |
2197 | * For all psy where the name of your driver | |
2198 | * appears in any supplied_to | |
2199 | */ | |
ea32cea1 AS |
2200 | j = match_string(supplicants, ext->num_supplicants, psy->desc->name); |
2201 | if (j < 0) | |
13151631 AM |
2202 | return 0; |
2203 | ||
2204 | /* Go through all properties for the psy */ | |
297d716f | 2205 | for (j = 0; j < ext->desc->num_properties; j++) { |
13151631 | 2206 | enum power_supply_property prop; |
297d716f | 2207 | prop = ext->desc->properties[j]; |
13151631 | 2208 | |
15077fc1 | 2209 | if (power_supply_get_property(ext, prop, &ret)) |
13151631 AM |
2210 | continue; |
2211 | ||
2212 | switch (prop) { | |
2213 | case POWER_SUPPLY_PROP_STATUS: | |
297d716f | 2214 | switch (ext->desc->type) { |
13151631 AM |
2215 | case POWER_SUPPLY_TYPE_BATTERY: |
2216 | switch (ret.intval) { | |
2217 | case POWER_SUPPLY_STATUS_UNKNOWN: | |
2218 | case POWER_SUPPLY_STATUS_DISCHARGING: | |
2219 | case POWER_SUPPLY_STATUS_NOT_CHARGING: | |
2220 | if (!di->flags.charging) | |
2221 | break; | |
2222 | di->flags.charging = false; | |
2223 | di->flags.fully_charged = false; | |
ea402401 MC |
2224 | if (di->bm->capacity_scaling) |
2225 | ab8500_fg_update_cap_scalers(di); | |
13151631 AM |
2226 | queue_work(di->fg_wq, &di->fg_work); |
2227 | break; | |
2228 | case POWER_SUPPLY_STATUS_FULL: | |
2229 | if (di->flags.fully_charged) | |
2230 | break; | |
2231 | di->flags.fully_charged = true; | |
2232 | di->flags.force_full = true; | |
2233 | /* Save current capacity as maximum */ | |
2234 | di->bat_cap.max_mah = di->bat_cap.mah; | |
2235 | queue_work(di->fg_wq, &di->fg_work); | |
2236 | break; | |
2237 | case POWER_SUPPLY_STATUS_CHARGING: | |
ea402401 MC |
2238 | if (di->flags.charging && |
2239 | !di->flags.fully_charged) | |
13151631 AM |
2240 | break; |
2241 | di->flags.charging = true; | |
2242 | di->flags.fully_charged = false; | |
ea402401 MC |
2243 | if (di->bm->capacity_scaling) |
2244 | ab8500_fg_update_cap_scalers(di); | |
13151631 AM |
2245 | queue_work(di->fg_wq, &di->fg_work); |
2246 | break; | |
c6ef5234 | 2247 | } |
b51883d4 | 2248 | break; |
13151631 AM |
2249 | default: |
2250 | break; | |
c6ef5234 | 2251 | } |
13151631 AM |
2252 | break; |
2253 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
297d716f | 2254 | switch (ext->desc->type) { |
13151631 | 2255 | case POWER_SUPPLY_TYPE_BATTERY: |
1a793a10 | 2256 | if (!di->flags.batt_id_received && |
25fd3303 LW |
2257 | (bi && (bi->technology != |
2258 | POWER_SUPPLY_TECHNOLOGY_UNKNOWN))) { | |
13151631 AM |
2259 | di->flags.batt_id_received = true; |
2260 | ||
2261 | di->bat_cap.max_mah_design = | |
25fd3303 | 2262 | di->bm->bi->charge_full_design_uah; |
13151631 AM |
2263 | |
2264 | di->bat_cap.max_mah = | |
2265 | di->bat_cap.max_mah_design; | |
2266 | ||
2a5f4183 | 2267 | di->vbat_nom_uv = |
25fd3303 | 2268 | di->bm->bi->voltage_max_design_uv; |
13151631 AM |
2269 | } |
2270 | ||
2271 | if (ret.intval) | |
2272 | di->flags.batt_unknown = false; | |
2273 | else | |
2274 | di->flags.batt_unknown = true; | |
2275 | break; | |
2276 | default: | |
2277 | break; | |
2278 | } | |
2279 | break; | |
2280 | case POWER_SUPPLY_PROP_TEMP: | |
297d716f | 2281 | switch (ext->desc->type) { |
13151631 | 2282 | case POWER_SUPPLY_TYPE_BATTERY: |
ea402401 MC |
2283 | if (di->flags.batt_id_received) |
2284 | di->bat_temp = ret.intval; | |
13151631 AM |
2285 | break; |
2286 | default: | |
2287 | break; | |
2288 | } | |
2289 | break; | |
2290 | default: | |
2291 | break; | |
2292 | } | |
2293 | } | |
2294 | return 0; | |
2295 | } | |
2296 | ||
2297 | /** | |
2298 | * ab8500_fg_init_hw_registers() - Set up FG related registers | |
2299 | * @di: pointer to the ab8500_fg structure | |
2300 | * | |
2301 | * Set up battery OVV, low battery voltage registers | |
2302 | */ | |
2303 | static int ab8500_fg_init_hw_registers(struct ab8500_fg *di) | |
2304 | { | |
2305 | int ret; | |
2306 | ||
d662a7df LW |
2307 | /* |
2308 | * Set VBAT OVV (overvoltage) threshold to 4.75V (typ) this is what | |
2309 | * the hardware supports, nothing else can be configured in hardware. | |
2310 | * See this as an "outer limit" where the charger will certainly | |
2311 | * shut down. Other (lower) overvoltage levels need to be implemented | |
2312 | * in software. | |
2313 | */ | |
13151631 AM |
2314 | ret = abx500_mask_and_set_register_interruptible(di->dev, |
2315 | AB8500_CHARGER, | |
2316 | AB8500_BATT_OVV, | |
2317 | BATT_OVV_TH_4P75, | |
2318 | BATT_OVV_TH_4P75); | |
2319 | if (ret) { | |
2320 | dev_err(di->dev, "failed to set BATT_OVV\n"); | |
2321 | goto out; | |
2322 | } | |
2323 | ||
2324 | /* Enable VBAT OVV detection */ | |
2325 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
2326 | AB8500_CHARGER, | |
2327 | AB8500_BATT_OVV, | |
2328 | BATT_OVV_ENA, | |
2329 | BATT_OVV_ENA); | |
2330 | if (ret) { | |
2331 | dev_err(di->dev, "failed to enable BATT_OVV\n"); | |
2332 | goto out; | |
2333 | } | |
2334 | ||
2335 | /* Low Battery Voltage */ | |
2336 | ret = abx500_set_register_interruptible(di->dev, | |
2337 | AB8500_SYS_CTRL2_BLOCK, | |
2338 | AB8500_LOW_BAT_REG, | |
2339 | ab8500_volt_to_regval( | |
0525f34d | 2340 | di->bm->fg_params->lowbat_threshold_uv) << 1 | |
13151631 AM |
2341 | LOW_BAT_ENABLE); |
2342 | if (ret) { | |
2343 | dev_err(di->dev, "%s write failed\n", __func__); | |
2344 | goto out; | |
2345 | } | |
2346 | ||
2347 | /* Battery OK threshold */ | |
2348 | ret = ab8500_fg_battok_init_hw_register(di); | |
2349 | if (ret) { | |
2350 | dev_err(di->dev, "BattOk init write failed.\n"); | |
2351 | goto out; | |
2352 | } | |
93ff722e | 2353 | |
4c4268dc | 2354 | if (is_ab8505(di->parent)) { |
93ff722e LJ |
2355 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, |
2356 | AB8505_RTC_PCUT_MAX_TIME_REG, di->bm->fg_params->pcut_max_time); | |
2357 | ||
2358 | if (ret) { | |
2359 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_MAX_TIME_REG\n", __func__); | |
2360 | goto out; | |
c6ef5234 | 2361 | } |
93ff722e LJ |
2362 | |
2363 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2364 | AB8505_RTC_PCUT_FLAG_TIME_REG, di->bm->fg_params->pcut_flag_time); | |
2365 | ||
2366 | if (ret) { | |
2367 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_FLAG_TIME_REG\n", __func__); | |
2368 | goto out; | |
c6ef5234 | 2369 | } |
93ff722e LJ |
2370 | |
2371 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2372 | AB8505_RTC_PCUT_RESTART_REG, di->bm->fg_params->pcut_max_restart); | |
2373 | ||
2374 | if (ret) { | |
2375 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_RESTART_REG\n", __func__); | |
2376 | goto out; | |
c6ef5234 | 2377 | } |
93ff722e LJ |
2378 | |
2379 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2380 | AB8505_RTC_PCUT_DEBOUNCE_REG, di->bm->fg_params->pcut_debounce_time); | |
2381 | ||
2382 | if (ret) { | |
2383 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_DEBOUNCE_REG\n", __func__); | |
2384 | goto out; | |
c6ef5234 | 2385 | } |
93ff722e LJ |
2386 | |
2387 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2388 | AB8505_RTC_PCUT_CTL_STATUS_REG, di->bm->fg_params->pcut_enable); | |
2389 | ||
2390 | if (ret) { | |
2391 | dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_CTL_STATUS_REG\n", __func__); | |
2392 | goto out; | |
c6ef5234 | 2393 | } |
93ff722e | 2394 | } |
13151631 AM |
2395 | out: |
2396 | return ret; | |
2397 | } | |
2398 | ||
2399 | /** | |
2400 | * ab8500_fg_external_power_changed() - callback for power supply changes | |
2401 | * @psy: pointer to the structure power_supply | |
2402 | * | |
2403 | * This function is the entry point of the pointer external_power_changed | |
2404 | * of the structure power_supply. | |
2405 | * This function gets executed when there is a change in any external power | |
2406 | * supply that this driver needs to be notified of. | |
2407 | */ | |
2408 | static void ab8500_fg_external_power_changed(struct power_supply *psy) | |
2409 | { | |
297d716f | 2410 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
13151631 AM |
2411 | |
2412 | class_for_each_device(power_supply_class, NULL, | |
297d716f | 2413 | di->fg_psy, ab8500_fg_get_ext_psy_data); |
13151631 AM |
2414 | } |
2415 | ||
2416 | /** | |
32c52eff | 2417 | * ab8500_fg_reinit_work() - work to reset the FG algorithm |
13151631 AM |
2418 | * @work: pointer to the work_struct structure |
2419 | * | |
2420 | * Used to reset the current battery capacity to be able to | |
2421 | * retrigger a new voltage base capacity calculation. For | |
2422 | * test and verification purpose. | |
2423 | */ | |
2424 | static void ab8500_fg_reinit_work(struct work_struct *work) | |
2425 | { | |
2426 | struct ab8500_fg *di = container_of(work, struct ab8500_fg, | |
2427 | fg_reinit_work.work); | |
2428 | ||
ddd86c95 | 2429 | if (!di->flags.calibrate) { |
13151631 AM |
2430 | dev_dbg(di->dev, "Resetting FG state machine to init.\n"); |
2431 | ab8500_fg_clear_cap_samples(di); | |
3bab7363 | 2432 | ab8500_fg_calc_cap_discharge_voltage(di); |
13151631 AM |
2433 | ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT); |
2434 | ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_INIT); | |
2435 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
2436 | ||
2437 | } else { | |
2438 | dev_err(di->dev, "Residual offset calibration ongoing " | |
2439 | "retrying..\n"); | |
2440 | /* Wait one second until next try*/ | |
2441 | queue_delayed_work(di->fg_wq, &di->fg_reinit_work, | |
2442 | round_jiffies(1)); | |
2443 | } | |
2444 | } | |
2445 | ||
13151631 AM |
2446 | /* Exposure to the sysfs interface */ |
2447 | ||
2448 | struct ab8500_fg_sysfs_entry { | |
2449 | struct attribute attr; | |
2450 | ssize_t (*show)(struct ab8500_fg *, char *); | |
2451 | ssize_t (*store)(struct ab8500_fg *, const char *, size_t); | |
2452 | }; | |
2453 | ||
2454 | static ssize_t charge_full_show(struct ab8500_fg *di, char *buf) | |
2455 | { | |
2456 | return sprintf(buf, "%d\n", di->bat_cap.max_mah); | |
2457 | } | |
2458 | ||
2459 | static ssize_t charge_full_store(struct ab8500_fg *di, const char *buf, | |
2460 | size_t count) | |
2461 | { | |
2462 | unsigned long charge_full; | |
54baff8d | 2463 | int ret; |
13151631 | 2464 | |
4b43eb67 | 2465 | ret = kstrtoul(buf, 10, &charge_full); |
54baff8d DC |
2466 | if (ret) |
2467 | return ret; | |
13151631 | 2468 | |
54baff8d DC |
2469 | di->bat_cap.max_mah = (int) charge_full; |
2470 | return count; | |
13151631 AM |
2471 | } |
2472 | ||
2473 | static ssize_t charge_now_show(struct ab8500_fg *di, char *buf) | |
2474 | { | |
2475 | return sprintf(buf, "%d\n", di->bat_cap.prev_mah); | |
2476 | } | |
2477 | ||
2478 | static ssize_t charge_now_store(struct ab8500_fg *di, const char *buf, | |
2479 | size_t count) | |
2480 | { | |
2481 | unsigned long charge_now; | |
54baff8d | 2482 | int ret; |
13151631 | 2483 | |
4b43eb67 | 2484 | ret = kstrtoul(buf, 10, &charge_now); |
54baff8d DC |
2485 | if (ret) |
2486 | return ret; | |
13151631 | 2487 | |
54baff8d DC |
2488 | di->bat_cap.user_mah = (int) charge_now; |
2489 | di->flags.user_cap = true; | |
2490 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
2491 | return count; | |
13151631 AM |
2492 | } |
2493 | ||
2494 | static struct ab8500_fg_sysfs_entry charge_full_attr = | |
2495 | __ATTR(charge_full, 0644, charge_full_show, charge_full_store); | |
2496 | ||
2497 | static struct ab8500_fg_sysfs_entry charge_now_attr = | |
2498 | __ATTR(charge_now, 0644, charge_now_show, charge_now_store); | |
2499 | ||
2500 | static ssize_t | |
2501 | ab8500_fg_show(struct kobject *kobj, struct attribute *attr, char *buf) | |
2502 | { | |
2503 | struct ab8500_fg_sysfs_entry *entry; | |
2504 | struct ab8500_fg *di; | |
2505 | ||
2506 | entry = container_of(attr, struct ab8500_fg_sysfs_entry, attr); | |
2507 | di = container_of(kobj, struct ab8500_fg, fg_kobject); | |
2508 | ||
2509 | if (!entry->show) | |
2510 | return -EIO; | |
2511 | ||
2512 | return entry->show(di, buf); | |
2513 | } | |
2514 | static ssize_t | |
2515 | ab8500_fg_store(struct kobject *kobj, struct attribute *attr, const char *buf, | |
2516 | size_t count) | |
2517 | { | |
2518 | struct ab8500_fg_sysfs_entry *entry; | |
2519 | struct ab8500_fg *di; | |
2520 | ||
2521 | entry = container_of(attr, struct ab8500_fg_sysfs_entry, attr); | |
2522 | di = container_of(kobj, struct ab8500_fg, fg_kobject); | |
2523 | ||
2524 | if (!entry->store) | |
2525 | return -EIO; | |
2526 | ||
2527 | return entry->store(di, buf, count); | |
2528 | } | |
2529 | ||
64eb9b02 | 2530 | static const struct sysfs_ops ab8500_fg_sysfs_ops = { |
13151631 AM |
2531 | .show = ab8500_fg_show, |
2532 | .store = ab8500_fg_store, | |
2533 | }; | |
2534 | ||
2535 | static struct attribute *ab8500_fg_attrs[] = { | |
2536 | &charge_full_attr.attr, | |
2537 | &charge_now_attr.attr, | |
2538 | NULL, | |
2539 | }; | |
a8e22309 | 2540 | ATTRIBUTE_GROUPS(ab8500_fg); |
13151631 AM |
2541 | |
2542 | static struct kobj_type ab8500_fg_ktype = { | |
2543 | .sysfs_ops = &ab8500_fg_sysfs_ops, | |
a8e22309 | 2544 | .default_groups = ab8500_fg_groups, |
13151631 AM |
2545 | }; |
2546 | ||
2547 | /** | |
32c52eff | 2548 | * ab8500_fg_sysfs_exit() - de-init of sysfs entry |
13151631 AM |
2549 | * @di: pointer to the struct ab8500_chargalg |
2550 | * | |
2551 | * This function removes the entry in sysfs. | |
2552 | */ | |
2553 | static void ab8500_fg_sysfs_exit(struct ab8500_fg *di) | |
2554 | { | |
2555 | kobject_del(&di->fg_kobject); | |
2556 | } | |
2557 | ||
2558 | /** | |
32c52eff | 2559 | * ab8500_fg_sysfs_init() - init of sysfs entry |
13151631 AM |
2560 | * @di: pointer to the struct ab8500_chargalg |
2561 | * | |
2562 | * This function adds an entry in sysfs. | |
2563 | * Returns error code in case of failure else 0(on success) | |
2564 | */ | |
2565 | static int ab8500_fg_sysfs_init(struct ab8500_fg *di) | |
2566 | { | |
2567 | int ret = 0; | |
2568 | ||
2569 | ret = kobject_init_and_add(&di->fg_kobject, | |
2570 | &ab8500_fg_ktype, | |
2571 | NULL, "battery"); | |
6a476046 ML |
2572 | if (ret < 0) { |
2573 | kobject_put(&di->fg_kobject); | |
13151631 | 2574 | dev_err(di->dev, "failed to create sysfs entry\n"); |
6a476046 | 2575 | } |
13151631 AM |
2576 | |
2577 | return ret; | |
2578 | } | |
93ff722e LJ |
2579 | |
2580 | static ssize_t ab8505_powercut_flagtime_read(struct device *dev, | |
2581 | struct device_attribute *attr, | |
2582 | char *buf) | |
2583 | { | |
2584 | int ret; | |
2585 | u8 reg_value; | |
2586 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2587 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2588 | |
2589 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2590 | AB8505_RTC_PCUT_FLAG_TIME_REG, ®_value); | |
2591 | ||
2592 | if (ret < 0) { | |
2593 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_FLAG_TIME_REG\n"); | |
2594 | goto fail; | |
2595 | } | |
2596 | ||
2597 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F)); | |
2598 | ||
2599 | fail: | |
2600 | return ret; | |
2601 | } | |
2602 | ||
2603 | static ssize_t ab8505_powercut_flagtime_write(struct device *dev, | |
2604 | struct device_attribute *attr, | |
2605 | const char *buf, size_t count) | |
2606 | { | |
2607 | int ret; | |
b00b04aa | 2608 | int reg_value; |
93ff722e | 2609 | struct power_supply *psy = dev_get_drvdata(dev); |
297d716f | 2610 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e | 2611 | |
b00b04aa DX |
2612 | if (kstrtoint(buf, 10, ®_value)) |
2613 | goto fail; | |
93ff722e LJ |
2614 | |
2615 | if (reg_value > 0x7F) { | |
2616 | dev_err(dev, "Incorrect parameter, echo 0 (1.98s) - 127 (15.625ms) for flagtime\n"); | |
2617 | goto fail; | |
2618 | } | |
2619 | ||
2620 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2621 | AB8505_RTC_PCUT_FLAG_TIME_REG, (u8)reg_value); | |
2622 | ||
2623 | if (ret < 0) | |
2624 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_FLAG_TIME_REG\n"); | |
2625 | ||
2626 | fail: | |
2627 | return count; | |
2628 | } | |
2629 | ||
2630 | static ssize_t ab8505_powercut_maxtime_read(struct device *dev, | |
2631 | struct device_attribute *attr, | |
2632 | char *buf) | |
2633 | { | |
2634 | int ret; | |
2635 | u8 reg_value; | |
2636 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2637 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2638 | |
2639 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2640 | AB8505_RTC_PCUT_MAX_TIME_REG, ®_value); | |
2641 | ||
2642 | if (ret < 0) { | |
2643 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_MAX_TIME_REG\n"); | |
2644 | goto fail; | |
2645 | } | |
2646 | ||
2647 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F)); | |
2648 | ||
2649 | fail: | |
2650 | return ret; | |
2651 | ||
2652 | } | |
2653 | ||
2654 | static ssize_t ab8505_powercut_maxtime_write(struct device *dev, | |
2655 | struct device_attribute *attr, | |
2656 | const char *buf, size_t count) | |
2657 | { | |
2658 | int ret; | |
2659 | int reg_value; | |
2660 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2661 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e | 2662 | |
b00b04aa DX |
2663 | if (kstrtoint(buf, 10, ®_value)) |
2664 | goto fail; | |
2665 | ||
93ff722e LJ |
2666 | if (reg_value > 0x7F) { |
2667 | dev_err(dev, "Incorrect parameter, echo 0 (0.0s) - 127 (1.98s) for maxtime\n"); | |
2668 | goto fail; | |
2669 | } | |
2670 | ||
2671 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2672 | AB8505_RTC_PCUT_MAX_TIME_REG, (u8)reg_value); | |
2673 | ||
2674 | if (ret < 0) | |
2675 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_MAX_TIME_REG\n"); | |
2676 | ||
2677 | fail: | |
2678 | return count; | |
2679 | } | |
2680 | ||
2681 | static ssize_t ab8505_powercut_restart_read(struct device *dev, | |
2682 | struct device_attribute *attr, | |
2683 | char *buf) | |
2684 | { | |
2685 | int ret; | |
2686 | u8 reg_value; | |
2687 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2688 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2689 | |
2690 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2691 | AB8505_RTC_PCUT_RESTART_REG, ®_value); | |
2692 | ||
2693 | if (ret < 0) { | |
2694 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_RESTART_REG\n"); | |
2695 | goto fail; | |
2696 | } | |
2697 | ||
2698 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0xF)); | |
2699 | ||
2700 | fail: | |
2701 | return ret; | |
2702 | } | |
2703 | ||
2704 | static ssize_t ab8505_powercut_restart_write(struct device *dev, | |
2705 | struct device_attribute *attr, | |
2706 | const char *buf, size_t count) | |
2707 | { | |
2708 | int ret; | |
2709 | int reg_value; | |
2710 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2711 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e | 2712 | |
b00b04aa DX |
2713 | if (kstrtoint(buf, 10, ®_value)) |
2714 | goto fail; | |
2715 | ||
93ff722e LJ |
2716 | if (reg_value > 0xF) { |
2717 | dev_err(dev, "Incorrect parameter, echo 0 - 15 for number of restart\n"); | |
2718 | goto fail; | |
2719 | } | |
2720 | ||
2721 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2722 | AB8505_RTC_PCUT_RESTART_REG, (u8)reg_value); | |
2723 | ||
2724 | if (ret < 0) | |
2725 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_RESTART_REG\n"); | |
2726 | ||
2727 | fail: | |
2728 | return count; | |
2729 | ||
2730 | } | |
2731 | ||
2732 | static ssize_t ab8505_powercut_timer_read(struct device *dev, | |
2733 | struct device_attribute *attr, | |
2734 | char *buf) | |
2735 | { | |
2736 | int ret; | |
2737 | u8 reg_value; | |
2738 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2739 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2740 | |
2741 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2742 | AB8505_RTC_PCUT_TIME_REG, ®_value); | |
2743 | ||
2744 | if (ret < 0) { | |
2745 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_TIME_REG\n"); | |
2746 | goto fail; | |
2747 | } | |
2748 | ||
2749 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F)); | |
2750 | ||
2751 | fail: | |
2752 | return ret; | |
2753 | } | |
2754 | ||
2755 | static ssize_t ab8505_powercut_restart_counter_read(struct device *dev, | |
2756 | struct device_attribute *attr, | |
2757 | char *buf) | |
2758 | { | |
2759 | int ret; | |
2760 | u8 reg_value; | |
2761 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2762 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2763 | |
2764 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2765 | AB8505_RTC_PCUT_RESTART_REG, ®_value); | |
2766 | ||
2767 | if (ret < 0) { | |
2768 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_RESTART_REG\n"); | |
2769 | goto fail; | |
2770 | } | |
2771 | ||
2772 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0xF0) >> 4); | |
2773 | ||
2774 | fail: | |
2775 | return ret; | |
2776 | } | |
2777 | ||
2778 | static ssize_t ab8505_powercut_read(struct device *dev, | |
2779 | struct device_attribute *attr, | |
2780 | char *buf) | |
2781 | { | |
2782 | int ret; | |
2783 | u8 reg_value; | |
2784 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2785 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2786 | |
2787 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2788 | AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value); | |
2789 | ||
2790 | if (ret < 0) | |
2791 | goto fail; | |
2792 | ||
2793 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x1)); | |
2794 | ||
2795 | fail: | |
2796 | return ret; | |
2797 | } | |
2798 | ||
2799 | static ssize_t ab8505_powercut_write(struct device *dev, | |
2800 | struct device_attribute *attr, | |
2801 | const char *buf, size_t count) | |
2802 | { | |
2803 | int ret; | |
2804 | int reg_value; | |
2805 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2806 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e | 2807 | |
b00b04aa DX |
2808 | if (kstrtoint(buf, 10, ®_value)) |
2809 | goto fail; | |
2810 | ||
93ff722e LJ |
2811 | if (reg_value > 0x1) { |
2812 | dev_err(dev, "Incorrect parameter, echo 0/1 to disable/enable Pcut feature\n"); | |
2813 | goto fail; | |
2814 | } | |
2815 | ||
2816 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2817 | AB8505_RTC_PCUT_CTL_STATUS_REG, (u8)reg_value); | |
2818 | ||
2819 | if (ret < 0) | |
2820 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_CTL_STATUS_REG\n"); | |
2821 | ||
2822 | fail: | |
2823 | return count; | |
2824 | } | |
2825 | ||
2826 | static ssize_t ab8505_powercut_flag_read(struct device *dev, | |
2827 | struct device_attribute *attr, | |
2828 | char *buf) | |
2829 | { | |
2830 | ||
2831 | int ret; | |
2832 | u8 reg_value; | |
2833 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2834 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2835 | |
2836 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2837 | AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value); | |
2838 | ||
2839 | if (ret < 0) { | |
2840 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_CTL_STATUS_REG\n"); | |
2841 | goto fail; | |
2842 | } | |
2843 | ||
2844 | return scnprintf(buf, PAGE_SIZE, "%d\n", ((reg_value & 0x10) >> 4)); | |
2845 | ||
2846 | fail: | |
2847 | return ret; | |
2848 | } | |
2849 | ||
2850 | static ssize_t ab8505_powercut_debounce_read(struct device *dev, | |
2851 | struct device_attribute *attr, | |
2852 | char *buf) | |
2853 | { | |
2854 | int ret; | |
2855 | u8 reg_value; | |
2856 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2857 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2858 | |
2859 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2860 | AB8505_RTC_PCUT_DEBOUNCE_REG, ®_value); | |
2861 | ||
2862 | if (ret < 0) { | |
2863 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_DEBOUNCE_REG\n"); | |
2864 | goto fail; | |
2865 | } | |
2866 | ||
2867 | return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7)); | |
2868 | ||
2869 | fail: | |
2870 | return ret; | |
2871 | } | |
2872 | ||
2873 | static ssize_t ab8505_powercut_debounce_write(struct device *dev, | |
2874 | struct device_attribute *attr, | |
2875 | const char *buf, size_t count) | |
2876 | { | |
2877 | int ret; | |
2878 | int reg_value; | |
2879 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2880 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e | 2881 | |
b00b04aa DX |
2882 | if (kstrtoint(buf, 10, ®_value)) |
2883 | goto fail; | |
2884 | ||
93ff722e LJ |
2885 | if (reg_value > 0x7) { |
2886 | dev_err(dev, "Incorrect parameter, echo 0 to 7 for debounce setting\n"); | |
2887 | goto fail; | |
2888 | } | |
2889 | ||
2890 | ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, | |
2891 | AB8505_RTC_PCUT_DEBOUNCE_REG, (u8)reg_value); | |
2892 | ||
2893 | if (ret < 0) | |
2894 | dev_err(dev, "Failed to set AB8505_RTC_PCUT_DEBOUNCE_REG\n"); | |
2895 | ||
2896 | fail: | |
2897 | return count; | |
2898 | } | |
2899 | ||
2900 | static ssize_t ab8505_powercut_enable_status_read(struct device *dev, | |
2901 | struct device_attribute *attr, | |
2902 | char *buf) | |
2903 | { | |
2904 | int ret; | |
2905 | u8 reg_value; | |
2906 | struct power_supply *psy = dev_get_drvdata(dev); | |
297d716f | 2907 | struct ab8500_fg *di = power_supply_get_drvdata(psy); |
93ff722e LJ |
2908 | |
2909 | ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, | |
2910 | AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value); | |
2911 | ||
2912 | if (ret < 0) { | |
2913 | dev_err(dev, "Failed to read AB8505_RTC_PCUT_CTL_STATUS_REG\n"); | |
2914 | goto fail; | |
2915 | } | |
2916 | ||
2917 | return scnprintf(buf, PAGE_SIZE, "%d\n", ((reg_value & 0x20) >> 5)); | |
2918 | ||
2919 | fail: | |
2920 | return ret; | |
2921 | } | |
2922 | ||
2923 | static struct device_attribute ab8505_fg_sysfs_psy_attrs[] = { | |
2924 | __ATTR(powercut_flagtime, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2925 | ab8505_powercut_flagtime_read, ab8505_powercut_flagtime_write), | |
2926 | __ATTR(powercut_maxtime, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2927 | ab8505_powercut_maxtime_read, ab8505_powercut_maxtime_write), | |
2928 | __ATTR(powercut_restart_max, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2929 | ab8505_powercut_restart_read, ab8505_powercut_restart_write), | |
2930 | __ATTR(powercut_timer, S_IRUGO, ab8505_powercut_timer_read, NULL), | |
2931 | __ATTR(powercut_restart_counter, S_IRUGO, | |
2932 | ab8505_powercut_restart_counter_read, NULL), | |
2933 | __ATTR(powercut_enable, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2934 | ab8505_powercut_read, ab8505_powercut_write), | |
2935 | __ATTR(powercut_flag, S_IRUGO, ab8505_powercut_flag_read, NULL), | |
2936 | __ATTR(powercut_debounce_time, (S_IRUGO | S_IWUSR | S_IWGRP), | |
2937 | ab8505_powercut_debounce_read, ab8505_powercut_debounce_write), | |
2938 | __ATTR(powercut_enable_status, S_IRUGO, | |
2939 | ab8505_powercut_enable_status_read, NULL), | |
2940 | }; | |
2941 | ||
c75cfa9e | 2942 | static int ab8500_fg_sysfs_psy_create_attrs(struct ab8500_fg *di) |
93ff722e | 2943 | { |
7881c647 | 2944 | unsigned int i; |
93ff722e | 2945 | |
4c4268dc | 2946 | if (is_ab8505(di->parent)) { |
7881c647 | 2947 | for (i = 0; i < ARRAY_SIZE(ab8505_fg_sysfs_psy_attrs); i++) |
297d716f | 2948 | if (device_create_file(&di->fg_psy->dev, |
7881c647 | 2949 | &ab8505_fg_sysfs_psy_attrs[i])) |
93ff722e LJ |
2950 | goto sysfs_psy_create_attrs_failed_ab8505; |
2951 | } | |
2952 | return 0; | |
2953 | sysfs_psy_create_attrs_failed_ab8505: | |
297d716f | 2954 | dev_err(&di->fg_psy->dev, "Failed creating sysfs psy attrs for ab8505.\n"); |
7881c647 | 2955 | while (i--) |
297d716f KK |
2956 | device_remove_file(&di->fg_psy->dev, |
2957 | &ab8505_fg_sysfs_psy_attrs[i]); | |
93ff722e LJ |
2958 | |
2959 | return -EIO; | |
2960 | } | |
2961 | ||
c75cfa9e | 2962 | static void ab8500_fg_sysfs_psy_remove_attrs(struct ab8500_fg *di) |
93ff722e LJ |
2963 | { |
2964 | unsigned int i; | |
93ff722e | 2965 | |
4c4268dc | 2966 | if (is_ab8505(di->parent)) { |
93ff722e | 2967 | for (i = 0; i < ARRAY_SIZE(ab8505_fg_sysfs_psy_attrs); i++) |
297d716f | 2968 | (void)device_remove_file(&di->fg_psy->dev, |
c75cfa9e | 2969 | &ab8505_fg_sysfs_psy_attrs[i]); |
93ff722e LJ |
2970 | } |
2971 | } | |
2972 | ||
13151631 AM |
2973 | /* Exposure to the sysfs interface <<END>> */ |
2974 | ||
f8efa0a8 | 2975 | static int __maybe_unused ab8500_fg_resume(struct device *dev) |
13151631 | 2976 | { |
f8efa0a8 | 2977 | struct ab8500_fg *di = dev_get_drvdata(dev); |
13151631 AM |
2978 | |
2979 | /* | |
2980 | * Change state if we're not charging. If we're charging we will wake | |
2981 | * up on the FG IRQ | |
2982 | */ | |
2983 | if (!di->flags.charging) { | |
2984 | ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_WAKEUP); | |
2985 | queue_work(di->fg_wq, &di->fg_work); | |
2986 | } | |
2987 | ||
2988 | return 0; | |
2989 | } | |
2990 | ||
f8efa0a8 | 2991 | static int __maybe_unused ab8500_fg_suspend(struct device *dev) |
13151631 | 2992 | { |
f8efa0a8 | 2993 | struct ab8500_fg *di = dev_get_drvdata(dev); |
13151631 AM |
2994 | |
2995 | flush_delayed_work(&di->fg_periodic_work); | |
53ef1f59 JA |
2996 | flush_work(&di->fg_work); |
2997 | flush_work(&di->fg_acc_cur_work); | |
2998 | flush_delayed_work(&di->fg_reinit_work); | |
2999 | flush_delayed_work(&di->fg_low_bat_work); | |
3000 | flush_delayed_work(&di->fg_check_hw_failure_work); | |
13151631 AM |
3001 | |
3002 | /* | |
3003 | * If the FG is enabled we will disable it before going to suspend | |
3004 | * only if we're not charging | |
3005 | */ | |
3006 | if (di->flags.fg_enabled && !di->flags.charging) | |
3007 | ab8500_fg_coulomb_counter(di, false); | |
3008 | ||
3009 | return 0; | |
3010 | } | |
13151631 | 3011 | |
13151631 | 3012 | /* ab8500 fg driver interrupts and their respective isr */ |
80704253 | 3013 | static struct ab8500_fg_interrupts ab8500_fg_irq[] = { |
13151631 AM |
3014 | {"NCONV_ACCU", ab8500_fg_cc_convend_handler}, |
3015 | {"BATT_OVV", ab8500_fg_batt_ovv_handler}, | |
3016 | {"LOW_BAT_F", ab8500_fg_lowbatf_handler}, | |
3017 | {"CC_INT_CALIB", ab8500_fg_cc_int_calib_handler}, | |
3018 | {"CCEOC", ab8500_fg_cc_data_end_handler}, | |
3019 | }; | |
3020 | ||
e0f1abeb R |
3021 | static char *supply_interface[] = { |
3022 | "ab8500_chargalg", | |
3023 | "ab8500_usb", | |
3024 | }; | |
3025 | ||
297d716f KK |
3026 | static const struct power_supply_desc ab8500_fg_desc = { |
3027 | .name = "ab8500_fg", | |
3028 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
3029 | .properties = ab8500_fg_props, | |
3030 | .num_properties = ARRAY_SIZE(ab8500_fg_props), | |
3031 | .get_property = ab8500_fg_get_property, | |
3032 | .external_power_changed = ab8500_fg_external_power_changed, | |
3033 | }; | |
3034 | ||
1c1f13a0 LW |
3035 | static int ab8500_fg_bind(struct device *dev, struct device *master, |
3036 | void *data) | |
3037 | { | |
3038 | struct ab8500_fg *di = dev_get_drvdata(dev); | |
3039 | ||
25fd3303 | 3040 | di->bat_cap.max_mah_design = di->bm->bi->charge_full_design_uah; |
fc81c435 | 3041 | di->bat_cap.max_mah = di->bat_cap.max_mah_design; |
25fd3303 | 3042 | di->vbat_nom_uv = di->bm->bi->voltage_max_design_uv; |
fc81c435 | 3043 | |
1c1f13a0 LW |
3044 | /* Start the coulomb counter */ |
3045 | ab8500_fg_coulomb_counter(di, true); | |
3046 | /* Run the FG algorithm */ | |
3047 | queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); | |
3048 | ||
3049 | return 0; | |
3050 | } | |
3051 | ||
3052 | static void ab8500_fg_unbind(struct device *dev, struct device *master, | |
3053 | void *data) | |
3054 | { | |
3055 | struct ab8500_fg *di = dev_get_drvdata(dev); | |
3056 | int ret; | |
3057 | ||
3058 | /* Disable coulomb counter */ | |
3059 | ret = ab8500_fg_coulomb_counter(di, false); | |
3060 | if (ret) | |
3061 | dev_err(dev, "failed to disable coulomb counter\n"); | |
3062 | ||
010ddb81 | 3063 | flush_workqueue(di->fg_wq); |
1c1f13a0 LW |
3064 | } |
3065 | ||
3066 | static const struct component_ops ab8500_fg_component_ops = { | |
3067 | .bind = ab8500_fg_bind, | |
3068 | .unbind = ab8500_fg_unbind, | |
3069 | }; | |
3070 | ||
c8afa640 | 3071 | static int ab8500_fg_probe(struct platform_device *pdev) |
13151631 | 3072 | { |
ad89cb5f | 3073 | struct device *dev = &pdev->dev; |
1c1f13a0 | 3074 | struct power_supply_config psy_cfg = {}; |
e0f1abeb | 3075 | struct ab8500_fg *di; |
13151631 AM |
3076 | int i, irq; |
3077 | int ret = 0; | |
13151631 | 3078 | |
ad89cb5f LW |
3079 | di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL); |
3080 | if (!di) | |
13151631 | 3081 | return -ENOMEM; |
195c1c66 | 3082 | |
417c0fc2 | 3083 | di->bm = &ab8500_bm_data; |
195c1c66 | 3084 | |
13151631 AM |
3085 | mutex_init(&di->cc_lock); |
3086 | ||
3087 | /* get parent data */ | |
ad89cb5f | 3088 | di->dev = dev; |
13151631 | 3089 | di->parent = dev_get_drvdata(pdev->dev.parent); |
1e82623c | 3090 | |
ad89cb5f | 3091 | di->main_bat_v = devm_iio_channel_get(dev, "main_bat_v"); |
1e82623c | 3092 | if (IS_ERR(di->main_bat_v)) { |
36f1de0d LW |
3093 | ret = dev_err_probe(dev, PTR_ERR(di->main_bat_v), |
3094 | "failed to get main battery ADC channel\n"); | |
3095 | return ret; | |
1e82623c | 3096 | } |
13151631 | 3097 | |
1ae4a91c LW |
3098 | if (!of_property_read_u32(dev->of_node, "line-impedance-micro-ohms", |
3099 | &di->line_impedance_uohm)) | |
3100 | dev_info(dev, "line impedance: %u uOhm\n", | |
3101 | di->line_impedance_uohm); | |
3102 | ||
2dc9215d KK |
3103 | psy_cfg.supplied_to = supply_interface; |
3104 | psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); | |
297d716f | 3105 | psy_cfg.drv_data = di; |
2dc9215d | 3106 | |
13151631 AM |
3107 | di->init_capacity = true; |
3108 | ||
3109 | ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT); | |
3110 | ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_INIT); | |
3111 | ||
010ddb81 LW |
3112 | /* Create a work queue for running the FG algorithm */ |
3113 | di->fg_wq = alloc_ordered_workqueue("ab8500_fg_wq", WQ_MEM_RECLAIM); | |
3114 | if (di->fg_wq == NULL) { | |
3115 | dev_err(dev, "failed to create work queue\n"); | |
3116 | return -ENOMEM; | |
3117 | } | |
3118 | ||
13151631 AM |
3119 | /* Init work for running the fg algorithm instantly */ |
3120 | INIT_WORK(&di->fg_work, ab8500_fg_instant_work); | |
3121 | ||
3122 | /* Init work for getting the battery accumulated current */ | |
3123 | INIT_WORK(&di->fg_acc_cur_work, ab8500_fg_acc_cur_work); | |
3124 | ||
3125 | /* Init work for reinitialising the fg algorithm */ | |
203b42f7 | 3126 | INIT_DEFERRABLE_WORK(&di->fg_reinit_work, |
13151631 AM |
3127 | ab8500_fg_reinit_work); |
3128 | ||
3129 | /* Work delayed Queue to run the state machine */ | |
203b42f7 | 3130 | INIT_DEFERRABLE_WORK(&di->fg_periodic_work, |
13151631 AM |
3131 | ab8500_fg_periodic_work); |
3132 | ||
3133 | /* Work to check low battery condition */ | |
203b42f7 | 3134 | INIT_DEFERRABLE_WORK(&di->fg_low_bat_work, |
13151631 AM |
3135 | ab8500_fg_low_bat_work); |
3136 | ||
3137 | /* Init work for HW failure check */ | |
203b42f7 | 3138 | INIT_DEFERRABLE_WORK(&di->fg_check_hw_failure_work, |
13151631 AM |
3139 | ab8500_fg_check_hw_failure_work); |
3140 | ||
75f2a219 HB |
3141 | /* Reset battery low voltage flag */ |
3142 | di->flags.low_bat = false; | |
3143 | ||
3144 | /* Initialize low battery counter */ | |
3145 | di->low_bat_cnt = 10; | |
3146 | ||
13151631 AM |
3147 | /* Initialize OVV, and other registers */ |
3148 | ret = ab8500_fg_init_hw_registers(di); | |
3149 | if (ret) { | |
ad89cb5f | 3150 | dev_err(dev, "failed to initialize registers\n"); |
0f5de2f0 | 3151 | destroy_workqueue(di->fg_wq); |
1c1f13a0 | 3152 | return ret; |
13151631 AM |
3153 | } |
3154 | ||
3155 | /* Consider battery unknown until we're informed otherwise */ | |
3156 | di->flags.batt_unknown = true; | |
3157 | di->flags.batt_id_received = false; | |
3158 | ||
3159 | /* Register FG power supply class */ | |
1c1f13a0 | 3160 | di->fg_psy = devm_power_supply_register(dev, &ab8500_fg_desc, &psy_cfg); |
297d716f | 3161 | if (IS_ERR(di->fg_psy)) { |
ad89cb5f | 3162 | dev_err(dev, "failed to register FG psy\n"); |
0f5de2f0 | 3163 | destroy_workqueue(di->fg_wq); |
1c1f13a0 | 3164 | return PTR_ERR(di->fg_psy); |
13151631 AM |
3165 | } |
3166 | ||
b0284de0 | 3167 | di->fg_samples = SEC_TO_SAMPLE(di->bm->fg_params->init_timer); |
13151631 | 3168 | |
3988a4df JB |
3169 | /* |
3170 | * Initialize completion used to notify completion and start | |
3171 | * of inst current | |
3172 | */ | |
3173 | init_completion(&di->ab8500_fg_started); | |
13151631 AM |
3174 | init_completion(&di->ab8500_fg_complete); |
3175 | ||
02232be7 | 3176 | /* Register primary interrupt handlers */ |
80704253 LW |
3177 | for (i = 0; i < ARRAY_SIZE(ab8500_fg_irq); i++) { |
3178 | irq = platform_get_irq_byname(pdev, ab8500_fg_irq[i].name); | |
0f5de2f0 GC |
3179 | if (irq < 0) { |
3180 | destroy_workqueue(di->fg_wq); | |
1c1f13a0 | 3181 | return irq; |
0f5de2f0 | 3182 | } |
b10e9700 | 3183 | |
1c1f13a0 LW |
3184 | ret = devm_request_threaded_irq(dev, irq, NULL, |
3185 | ab8500_fg_irq[i].isr, | |
80704253 LW |
3186 | IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT, |
3187 | ab8500_fg_irq[i].name, di); | |
13151631 AM |
3188 | |
3189 | if (ret != 0) { | |
ad89cb5f | 3190 | dev_err(dev, "failed to request %s IRQ %d: %d\n", |
80704253 | 3191 | ab8500_fg_irq[i].name, irq, ret); |
0f5de2f0 | 3192 | destroy_workqueue(di->fg_wq); |
1c1f13a0 | 3193 | return ret; |
13151631 | 3194 | } |
ad89cb5f | 3195 | dev_dbg(dev, "Requested %s IRQ %d: %d\n", |
80704253 | 3196 | ab8500_fg_irq[i].name, irq, ret); |
02232be7 | 3197 | } |
02232be7 | 3198 | |
13151631 AM |
3199 | di->irq = platform_get_irq_byname(pdev, "CCEOC"); |
3200 | disable_irq(di->irq); | |
3988a4df | 3201 | di->nbr_cceoc_irq_cnt = 0; |
13151631 AM |
3202 | |
3203 | platform_set_drvdata(pdev, di); | |
3204 | ||
3205 | ret = ab8500_fg_sysfs_init(di); | |
3206 | if (ret) { | |
ad89cb5f | 3207 | dev_err(dev, "failed to create sysfs entry\n"); |
0f5de2f0 | 3208 | destroy_workqueue(di->fg_wq); |
1c1f13a0 | 3209 | return ret; |
13151631 AM |
3210 | } |
3211 | ||
c75cfa9e | 3212 | ret = ab8500_fg_sysfs_psy_create_attrs(di); |
93ff722e | 3213 | if (ret) { |
ad89cb5f | 3214 | dev_err(dev, "failed to create FG psy\n"); |
93ff722e | 3215 | ab8500_fg_sysfs_exit(di); |
0f5de2f0 | 3216 | destroy_workqueue(di->fg_wq); |
1c1f13a0 | 3217 | return ret; |
93ff722e LJ |
3218 | } |
3219 | ||
13151631 AM |
3220 | /* Calibrate the fg first time */ |
3221 | di->flags.calibrate = true; | |
3222 | di->calib_state = AB8500_FG_CALIB_INIT; | |
3223 | ||
3224 | /* Use room temp as default value until we get an update from driver. */ | |
3225 | di->bat_temp = 210; | |
3226 | ||
13151631 AM |
3227 | list_add_tail(&di->node, &ab8500_fg_list); |
3228 | ||
1c1f13a0 LW |
3229 | return component_add(dev, &ab8500_fg_component_ops); |
3230 | } | |
13151631 | 3231 | |
1c1f13a0 LW |
3232 | static int ab8500_fg_remove(struct platform_device *pdev) |
3233 | { | |
1c1f13a0 LW |
3234 | struct ab8500_fg *di = platform_get_drvdata(pdev); |
3235 | ||
010ddb81 LW |
3236 | destroy_workqueue(di->fg_wq); |
3237 | flush_scheduled_work(); | |
1c1f13a0 LW |
3238 | component_del(&pdev->dev, &ab8500_fg_component_ops); |
3239 | list_del(&di->node); | |
3240 | ab8500_fg_sysfs_exit(di); | |
3241 | ab8500_fg_sysfs_psy_remove_attrs(di); | |
ccc023a5 | 3242 | |
cd4c7b27 | 3243 | return 0; |
13151631 AM |
3244 | } |
3245 | ||
f8efa0a8 LW |
3246 | static SIMPLE_DEV_PM_OPS(ab8500_fg_pm_ops, ab8500_fg_suspend, ab8500_fg_resume); |
3247 | ||
e0f1abeb R |
3248 | static const struct of_device_id ab8500_fg_match[] = { |
3249 | { .compatible = "stericsson,ab8500-fg", }, | |
3250 | { }, | |
3251 | }; | |
dfe52db1 | 3252 | MODULE_DEVICE_TABLE(of, ab8500_fg_match); |
e0f1abeb | 3253 | |
1c1f13a0 | 3254 | struct platform_driver ab8500_fg_driver = { |
13151631 | 3255 | .probe = ab8500_fg_probe, |
28ea73f4 | 3256 | .remove = ab8500_fg_remove, |
13151631 AM |
3257 | .driver = { |
3258 | .name = "ab8500-fg", | |
e0f1abeb | 3259 | .of_match_table = ab8500_fg_match, |
f8efa0a8 | 3260 | .pm = &ab8500_fg_pm_ops, |
13151631 AM |
3261 | }, |
3262 | }; | |
13151631 AM |
3263 | MODULE_LICENSE("GPL v2"); |
3264 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski"); | |
3265 | MODULE_ALIAS("platform:ab8500-fg"); | |
3266 | MODULE_DESCRIPTION("AB8500 Fuel Gauge driver"); |