Subbaraman Narayanamurthy | 390aa5e | 2018-01-26 12:49:57 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2018, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #define pr_fmt(fmt) "ALG: %s: " fmt, __func__ |
| 14 | |
| 15 | #include <linux/err.h> |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/mutex.h> |
| 18 | #include <linux/power_supply.h> |
Vamshi Krishna B V | 90792c0 | 2018-05-28 22:47:06 +0530 | [diff] [blame] | 19 | #include <linux/slab.h> |
| 20 | #include <linux/sort.h> |
Subbaraman Narayanamurthy | 390aa5e | 2018-01-26 12:49:57 -0800 | [diff] [blame] | 21 | #include "fg-alg.h" |
| 22 | |
| 23 | #define FULL_SOC_RAW 255 |
Vamshi Krishna B V | 342dce5 | 2018-05-17 14:37:29 +0530 | [diff] [blame] | 24 | #define FULL_BATT_SOC GENMASK(31, 0) |
Subbaraman Narayanamurthy | 390aa5e | 2018-01-26 12:49:57 -0800 | [diff] [blame] | 25 | #define CAPACITY_DELTA_DECIPCT 500 |
| 26 | |
Vamshi Krishna B V | 90792c0 | 2018-05-28 22:47:06 +0530 | [diff] [blame] | 27 | #define CENTI_ICORRECT_C0 105 |
| 28 | #define CENTI_ICORRECT_C1 20 |
| 29 | |
| 30 | #define HOURS_TO_SECONDS 3600 |
| 31 | #define OCV_SLOPE_UV 10869 |
| 32 | #define MILLI_UNIT 1000 |
| 33 | #define MICRO_UNIT 1000000 |
| 34 | #define NANO_UNIT 1000000000 |
| 35 | |
| 36 | #define DEFAULT_TTF_RUN_PERIOD_MS 10000 |
| 37 | #define DEFAULT_TTF_ITERM_DELTA_MA 200 |
| 38 | |
| 39 | static const struct ttf_pt ttf_ln_table[] = { |
| 40 | { 1000, 0 }, |
| 41 | { 2000, 693 }, |
| 42 | { 4000, 1386 }, |
| 43 | { 6000, 1792 }, |
| 44 | { 8000, 2079 }, |
| 45 | { 16000, 2773 }, |
| 46 | { 32000, 3466 }, |
| 47 | { 64000, 4159 }, |
| 48 | { 128000, 4852 }, |
| 49 | }; |
| 50 | |
Subbaraman Narayanamurthy | 390aa5e | 2018-01-26 12:49:57 -0800 | [diff] [blame] | 51 | /* Cycle counter APIs */ |
| 52 | |
| 53 | /** |
| 54 | * restore_cycle_count - |
| 55 | * @counter: Cycle counter object |
| 56 | * |
| 57 | * Restores all the counters back from FG/QG during boot |
| 58 | * |
| 59 | */ |
| 60 | int restore_cycle_count(struct cycle_counter *counter) |
| 61 | { |
| 62 | int rc = 0; |
| 63 | |
| 64 | if (!counter) |
| 65 | return -ENODEV; |
| 66 | |
| 67 | mutex_lock(&counter->lock); |
| 68 | rc = counter->restore_count(counter->data, counter->count, |
| 69 | BUCKET_COUNT); |
| 70 | if (rc < 0) |
| 71 | pr_err("failed to restore cycle counter rc=%d\n", rc); |
| 72 | mutex_unlock(&counter->lock); |
| 73 | |
| 74 | return rc; |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * clear_cycle_count - |
| 79 | * @counter: Cycle counter object |
| 80 | * |
| 81 | * Clears all the counters stored by FG/QG when a battery is inserted |
| 82 | * or the profile is re-loaded. |
| 83 | * |
| 84 | */ |
| 85 | void clear_cycle_count(struct cycle_counter *counter) |
| 86 | { |
| 87 | int rc = 0, i; |
| 88 | |
| 89 | if (!counter) |
| 90 | return; |
| 91 | |
| 92 | mutex_lock(&counter->lock); |
| 93 | memset(counter->count, 0, sizeof(counter->count)); |
| 94 | for (i = 0; i < BUCKET_COUNT; i++) { |
| 95 | counter->started[i] = false; |
| 96 | counter->last_soc[i] = 0; |
| 97 | } |
| 98 | |
| 99 | rc = counter->store_count(counter->data, counter->count, 0, |
| 100 | BUCKET_COUNT * 2); |
| 101 | if (rc < 0) |
| 102 | pr_err("failed to clear cycle counter rc=%d\n", rc); |
| 103 | |
| 104 | mutex_unlock(&counter->lock); |
| 105 | } |
| 106 | |
| 107 | /** |
| 108 | * store_cycle_count - |
| 109 | * @counter: Cycle counter object |
| 110 | * @id: Cycle counter bucket id |
| 111 | * |
| 112 | * Stores the cycle counter for a bucket in FG/QG. |
| 113 | * |
| 114 | */ |
| 115 | static int store_cycle_count(struct cycle_counter *counter, int id) |
| 116 | { |
| 117 | int rc = 0; |
| 118 | u16 cyc_count; |
| 119 | |
| 120 | if (!counter) |
| 121 | return -ENODEV; |
| 122 | |
| 123 | if (id < 0 || (id > BUCKET_COUNT - 1)) { |
| 124 | pr_err("Invalid id %d\n", id); |
| 125 | return -EINVAL; |
| 126 | } |
| 127 | |
| 128 | cyc_count = counter->count[id]; |
| 129 | cyc_count++; |
| 130 | |
| 131 | rc = counter->store_count(counter->data, &cyc_count, id, 2); |
| 132 | if (rc < 0) { |
| 133 | pr_err("failed to write cycle_count[%d] rc=%d\n", |
| 134 | id, rc); |
| 135 | return rc; |
| 136 | } |
| 137 | |
| 138 | counter->count[id] = cyc_count; |
| 139 | pr_debug("Stored count %d in id %d\n", cyc_count, id); |
| 140 | |
| 141 | return rc; |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * cycle_count_update - |
| 146 | * @counter: Cycle counter object |
| 147 | * @batt_soc: Battery State of Charge (SOC) |
| 148 | * @charge_status: Charging status from power supply |
| 149 | * @charge_done: Indicator for charge termination |
| 150 | * @input_present: Indicator for input presence |
| 151 | * |
| 152 | * Called by FG/QG whenever there is a state change (Charging status, SOC) |
| 153 | * |
| 154 | */ |
| 155 | void cycle_count_update(struct cycle_counter *counter, int batt_soc, |
| 156 | int charge_status, bool charge_done, bool input_present) |
| 157 | { |
| 158 | int rc = 0, id, i, soc_thresh; |
| 159 | |
| 160 | if (!counter) |
| 161 | return; |
| 162 | |
| 163 | mutex_lock(&counter->lock); |
| 164 | |
| 165 | /* Find out which id the SOC falls in */ |
| 166 | id = batt_soc / BUCKET_SOC_PCT; |
| 167 | |
| 168 | if (charge_status == POWER_SUPPLY_STATUS_CHARGING) { |
| 169 | if (!counter->started[id] && id != counter->last_bucket) { |
| 170 | counter->started[id] = true; |
| 171 | counter->last_soc[id] = batt_soc; |
| 172 | } |
| 173 | } else if (charge_done || !input_present) { |
| 174 | for (i = 0; i < BUCKET_COUNT; i++) { |
| 175 | soc_thresh = counter->last_soc[i] + BUCKET_SOC_PCT / 2; |
| 176 | if (counter->started[i] && batt_soc > soc_thresh) { |
| 177 | rc = store_cycle_count(counter, i); |
| 178 | if (rc < 0) |
| 179 | pr_err("Error in storing cycle_ctr rc: %d\n", |
| 180 | rc); |
| 181 | counter->last_soc[i] = 0; |
| 182 | counter->started[i] = false; |
| 183 | counter->last_bucket = i; |
| 184 | } |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | pr_debug("batt_soc: %d id: %d chg_status: %d\n", batt_soc, id, |
| 189 | charge_status); |
| 190 | mutex_unlock(&counter->lock); |
| 191 | } |
| 192 | |
| 193 | /** |
Vamshi Krishna B V | 9ec0ee5 | 2018-05-10 18:00:49 +0530 | [diff] [blame] | 194 | * get_bucket_cycle_count - |
Subbaraman Narayanamurthy | 390aa5e | 2018-01-26 12:49:57 -0800 | [diff] [blame] | 195 | * @counter: Cycle counter object |
| 196 | * |
| 197 | * Returns the cycle counter for a SOC bucket. |
| 198 | * |
| 199 | */ |
Vamshi Krishna B V | 9ec0ee5 | 2018-05-10 18:00:49 +0530 | [diff] [blame] | 200 | static int get_bucket_cycle_count(struct cycle_counter *counter) |
Subbaraman Narayanamurthy | 390aa5e | 2018-01-26 12:49:57 -0800 | [diff] [blame] | 201 | { |
| 202 | int count; |
| 203 | |
| 204 | if (!counter) |
| 205 | return 0; |
| 206 | |
| 207 | if ((counter->id <= 0) || (counter->id > BUCKET_COUNT)) |
| 208 | return -EINVAL; |
| 209 | |
| 210 | mutex_lock(&counter->lock); |
| 211 | count = counter->count[counter->id - 1]; |
| 212 | mutex_unlock(&counter->lock); |
| 213 | return count; |
| 214 | } |
| 215 | |
| 216 | /** |
Vamshi Krishna B V | 9ec0ee5 | 2018-05-10 18:00:49 +0530 | [diff] [blame] | 217 | * get_cycle_counts - |
| 218 | * @counter: Cycle counter object |
| 219 | * @buf: Bucket cycle counts formatted in a string returned to the caller |
| 220 | * |
| 221 | * Get cycle count for all buckets in a string format |
| 222 | */ |
| 223 | int get_cycle_counts(struct cycle_counter *counter, const char **buf) |
| 224 | { |
| 225 | int i, rc, len = 0; |
| 226 | |
| 227 | for (i = 1; i <= BUCKET_COUNT; i++) { |
| 228 | counter->id = i; |
| 229 | rc = get_bucket_cycle_count(counter); |
| 230 | if (rc < 0) { |
| 231 | pr_err("Couldn't get cycle count rc=%d\n", rc); |
| 232 | return rc; |
| 233 | } |
| 234 | |
| 235 | if (sizeof(counter->str_buf) - len < 8) { |
| 236 | pr_err("Invalid length %d\n", len); |
| 237 | return -EINVAL; |
| 238 | } |
| 239 | |
| 240 | len += snprintf(counter->str_buf+len, 8, "%d ", rc); |
| 241 | } |
| 242 | |
| 243 | counter->str_buf[len] = '\0'; |
| 244 | *buf = counter->str_buf; |
| 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * get_cycle_count - |
| 250 | * @counter: Cycle counter object |
| 251 | * @count: Average cycle count returned to the caller |
| 252 | * |
| 253 | * Get average cycle count for all buckets |
| 254 | */ |
| 255 | int get_cycle_count(struct cycle_counter *counter, int *count) |
| 256 | { |
| 257 | int i, rc, temp = 0; |
| 258 | |
| 259 | for (i = 1; i <= BUCKET_COUNT; i++) { |
| 260 | counter->id = i; |
| 261 | rc = get_bucket_cycle_count(counter); |
| 262 | if (rc < 0) { |
| 263 | pr_err("Couldn't get cycle count rc=%d\n", rc); |
| 264 | return rc; |
| 265 | } |
| 266 | |
| 267 | temp += rc; |
| 268 | } |
| 269 | |
| 270 | /* |
| 271 | * Normalize the counter across each bucket so that we can get |
| 272 | * the overall charge cycle count. |
| 273 | */ |
| 274 | *count = temp / BUCKET_COUNT; |
| 275 | return 0; |
| 276 | } |
| 277 | |
| 278 | /** |
Subbaraman Narayanamurthy | 390aa5e | 2018-01-26 12:49:57 -0800 | [diff] [blame] | 279 | * cycle_count_init - |
| 280 | * @counter: Cycle counter object |
| 281 | * |
| 282 | * FG/QG have to call this during driver probe to validate the required |
| 283 | * parameters after allocating cycle_counter object. |
| 284 | * |
| 285 | */ |
| 286 | int cycle_count_init(struct cycle_counter *counter) |
| 287 | { |
| 288 | if (!counter) |
| 289 | return -ENODEV; |
| 290 | |
| 291 | if (!counter->data || !counter->restore_count || |
| 292 | !counter->store_count) { |
| 293 | pr_err("Invalid parameters for using cycle counter\n"); |
| 294 | return -EINVAL; |
| 295 | } |
| 296 | |
| 297 | mutex_init(&counter->lock); |
| 298 | counter->last_bucket = -1; |
| 299 | return 0; |
| 300 | } |
| 301 | |
| 302 | /* Capacity learning algorithm APIs */ |
| 303 | |
| 304 | /** |
| 305 | * cap_learning_post_process - |
| 306 | * @cl: Capacity learning object |
| 307 | * |
| 308 | * Does post processing on the learnt capacity based on the user specified |
| 309 | * or default parameters for the capacity learning algorithm. |
| 310 | * |
| 311 | */ |
| 312 | static void cap_learning_post_process(struct cap_learning *cl) |
| 313 | { |
| 314 | int64_t max_inc_val, min_dec_val, old_cap; |
| 315 | int rc; |
| 316 | |
| 317 | if (cl->dt.skew_decipct) { |
| 318 | pr_debug("applying skew %d on current learnt capacity %lld\n", |
| 319 | cl->dt.skew_decipct, cl->final_cap_uah); |
| 320 | cl->final_cap_uah = cl->final_cap_uah * |
| 321 | (1000 + cl->dt.skew_decipct); |
| 322 | cl->final_cap_uah = div64_u64(cl->final_cap_uah, 1000); |
| 323 | } |
| 324 | |
| 325 | max_inc_val = cl->learned_cap_uah * (1000 + cl->dt.max_cap_inc); |
| 326 | max_inc_val = div64_u64(max_inc_val, 1000); |
| 327 | |
| 328 | min_dec_val = cl->learned_cap_uah * (1000 - cl->dt.max_cap_dec); |
| 329 | min_dec_val = div64_u64(min_dec_val, 1000); |
| 330 | |
| 331 | old_cap = cl->learned_cap_uah; |
| 332 | if (cl->final_cap_uah > max_inc_val) |
| 333 | cl->learned_cap_uah = max_inc_val; |
| 334 | else if (cl->final_cap_uah < min_dec_val) |
| 335 | cl->learned_cap_uah = min_dec_val; |
| 336 | else |
| 337 | cl->learned_cap_uah = cl->final_cap_uah; |
| 338 | |
| 339 | if (cl->dt.max_cap_limit) { |
| 340 | max_inc_val = (int64_t)cl->nom_cap_uah * (1000 + |
| 341 | cl->dt.max_cap_limit); |
| 342 | max_inc_val = div64_u64(max_inc_val, 1000); |
| 343 | if (cl->final_cap_uah > max_inc_val) { |
| 344 | pr_debug("learning capacity %lld goes above max limit %lld\n", |
| 345 | cl->final_cap_uah, max_inc_val); |
| 346 | cl->learned_cap_uah = max_inc_val; |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | if (cl->dt.min_cap_limit) { |
| 351 | min_dec_val = (int64_t)cl->nom_cap_uah * (1000 - |
| 352 | cl->dt.min_cap_limit); |
| 353 | min_dec_val = div64_u64(min_dec_val, 1000); |
| 354 | if (cl->final_cap_uah < min_dec_val) { |
| 355 | pr_debug("learning capacity %lld goes below min limit %lld\n", |
| 356 | cl->final_cap_uah, min_dec_val); |
| 357 | cl->learned_cap_uah = min_dec_val; |
| 358 | } |
| 359 | } |
| 360 | |
| 361 | if (cl->store_learned_capacity) { |
| 362 | rc = cl->store_learned_capacity(cl->data, cl->learned_cap_uah); |
| 363 | if (rc < 0) |
| 364 | pr_err("Error in storing learned_cap_uah, rc=%d\n", rc); |
| 365 | } |
| 366 | |
| 367 | pr_debug("final cap_uah = %lld, learned capacity %lld -> %lld uah\n", |
| 368 | cl->final_cap_uah, old_cap, cl->learned_cap_uah); |
| 369 | } |
| 370 | |
| 371 | /** |
| 372 | * cap_learning_process_full_data - |
| 373 | * @cl: Capacity learning object |
| 374 | * |
| 375 | * Processes the coulomb counter during charge termination and calculates the |
| 376 | * delta w.r.to the coulomb counter obtained earlier when the learning begun. |
| 377 | * |
| 378 | */ |
| 379 | static int cap_learning_process_full_data(struct cap_learning *cl) |
| 380 | { |
Vamshi Krishna B V | 342dce5 | 2018-05-17 14:37:29 +0530 | [diff] [blame] | 381 | int rc, cc_soc_sw, cc_soc_delta_centi_pct; |
Subbaraman Narayanamurthy | 390aa5e | 2018-01-26 12:49:57 -0800 | [diff] [blame] | 382 | int64_t delta_cap_uah; |
| 383 | |
| 384 | rc = cl->get_cc_soc(cl->data, &cc_soc_sw); |
| 385 | if (rc < 0) { |
| 386 | pr_err("Error in getting CC_SOC_SW, rc=%d\n", rc); |
| 387 | return rc; |
| 388 | } |
| 389 | |
Vamshi Krishna B V | 342dce5 | 2018-05-17 14:37:29 +0530 | [diff] [blame] | 390 | cc_soc_delta_centi_pct = |
| 391 | div64_s64((int64_t)(cc_soc_sw - cl->init_cc_soc_sw) * 10000, |
Subbaraman Narayanamurthy | 390aa5e | 2018-01-26 12:49:57 -0800 | [diff] [blame] | 392 | cl->cc_soc_max); |
| 393 | |
| 394 | /* If the delta is < 50%, then skip processing full data */ |
Vamshi Krishna B V | 342dce5 | 2018-05-17 14:37:29 +0530 | [diff] [blame] | 395 | if (cc_soc_delta_centi_pct < 5000) { |
| 396 | pr_err("cc_soc_delta_centi_pct: %d\n", cc_soc_delta_centi_pct); |
Subbaraman Narayanamurthy | 390aa5e | 2018-01-26 12:49:57 -0800 | [diff] [blame] | 397 | return -ERANGE; |
| 398 | } |
| 399 | |
Vamshi Krishna B V | 342dce5 | 2018-05-17 14:37:29 +0530 | [diff] [blame] | 400 | delta_cap_uah = div64_s64(cl->learned_cap_uah * cc_soc_delta_centi_pct, |
| 401 | 10000); |
Subbaraman Narayanamurthy | 390aa5e | 2018-01-26 12:49:57 -0800 | [diff] [blame] | 402 | cl->final_cap_uah = cl->init_cap_uah + delta_cap_uah; |
Vamshi Krishna B V | 342dce5 | 2018-05-17 14:37:29 +0530 | [diff] [blame] | 403 | pr_debug("Current cc_soc=%d cc_soc_delta_centi_pct=%d total_cap_uah=%lld\n", |
| 404 | cc_soc_sw, cc_soc_delta_centi_pct, cl->final_cap_uah); |
Subbaraman Narayanamurthy | 390aa5e | 2018-01-26 12:49:57 -0800 | [diff] [blame] | 405 | return 0; |
| 406 | } |
| 407 | |
| 408 | /** |
| 409 | * cap_learning_begin - |
| 410 | * @cl: Capacity learning object |
| 411 | * @batt_soc: Battery State of Charge (SOC) |
| 412 | * |
| 413 | * Gets the coulomb counter from FG/QG when the conditions are suitable for |
| 414 | * beginning capacity learning. Also, primes the coulomb counter based on |
| 415 | * battery SOC if required. |
| 416 | * |
| 417 | */ |
| 418 | static int cap_learning_begin(struct cap_learning *cl, u32 batt_soc) |
| 419 | { |
Vamshi Krishna B V | de19340 | 2018-04-27 12:14:50 +0530 | [diff] [blame] | 420 | int rc, cc_soc_sw, batt_soc_msb, batt_soc_pct; |
Subbaraman Narayanamurthy | 390aa5e | 2018-01-26 12:49:57 -0800 | [diff] [blame] | 421 | |
| 422 | batt_soc_msb = batt_soc >> 24; |
Vamshi Krishna B V | de19340 | 2018-04-27 12:14:50 +0530 | [diff] [blame] | 423 | batt_soc_pct = DIV_ROUND_CLOSEST(batt_soc_msb * 100, FULL_SOC_RAW); |
| 424 | |
| 425 | if (batt_soc_pct > cl->dt.max_start_soc || |
| 426 | batt_soc_pct < cl->dt.min_start_soc) { |
| 427 | pr_debug("Battery SOC %d is high/low, not starting\n", |
| 428 | batt_soc_pct); |
Subbaraman Narayanamurthy | 390aa5e | 2018-01-26 12:49:57 -0800 | [diff] [blame] | 429 | return -EINVAL; |
| 430 | } |
| 431 | |
Vamshi Krishna B V | 342dce5 | 2018-05-17 14:37:29 +0530 | [diff] [blame] | 432 | cl->init_cap_uah = div64_s64(cl->learned_cap_uah * batt_soc, |
| 433 | FULL_BATT_SOC); |
Subbaraman Narayanamurthy | 390aa5e | 2018-01-26 12:49:57 -0800 | [diff] [blame] | 434 | |
| 435 | if (cl->prime_cc_soc) { |
| 436 | /* |
| 437 | * Prime cc_soc_sw with battery SOC when capacity learning |
| 438 | * begins. |
| 439 | */ |
| 440 | rc = cl->prime_cc_soc(cl->data, batt_soc); |
| 441 | if (rc < 0) { |
| 442 | pr_err("Error in writing cc_soc_sw, rc=%d\n", rc); |
| 443 | goto out; |
| 444 | } |
| 445 | } |
| 446 | |
| 447 | rc = cl->get_cc_soc(cl->data, &cc_soc_sw); |
| 448 | if (rc < 0) { |
| 449 | pr_err("Error in getting CC_SOC_SW, rc=%d\n", rc); |
| 450 | goto out; |
| 451 | } |
| 452 | |
| 453 | cl->init_cc_soc_sw = cc_soc_sw; |
| 454 | pr_debug("Capacity learning started @ battery SOC %d init_cc_soc_sw:%d\n", |
| 455 | batt_soc_msb, cl->init_cc_soc_sw); |
| 456 | out: |
| 457 | return rc; |
| 458 | } |
| 459 | |
| 460 | /** |
| 461 | * cap_learning_done - |
| 462 | * @cl: Capacity learning object |
| 463 | * |
| 464 | * Top level function for getting coulomb counter and post processing the |
| 465 | * data once the capacity learning is complete after charge termination. |
| 466 | * |
| 467 | */ |
| 468 | static int cap_learning_done(struct cap_learning *cl) |
| 469 | { |
| 470 | int rc; |
| 471 | |
| 472 | rc = cap_learning_process_full_data(cl); |
| 473 | if (rc < 0) { |
| 474 | pr_err("Error in processing cap learning full data, rc=%d\n", |
| 475 | rc); |
| 476 | goto out; |
| 477 | } |
| 478 | |
| 479 | if (cl->prime_cc_soc) { |
| 480 | /* Write a FULL value to cc_soc_sw */ |
| 481 | rc = cl->prime_cc_soc(cl->data, cl->cc_soc_max); |
| 482 | if (rc < 0) { |
| 483 | pr_err("Error in writing cc_soc_sw, rc=%d\n", rc); |
| 484 | goto out; |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | cap_learning_post_process(cl); |
| 489 | out: |
| 490 | return rc; |
| 491 | } |
| 492 | |
| 493 | /** |
| 494 | * cap_learning_update - |
| 495 | * @cl: Capacity learning object |
| 496 | * @batt_temp - Battery temperature |
| 497 | * @batt_soc: Battery State of Charge (SOC) |
| 498 | * @charge_status: Charging status from power supply |
| 499 | * @charge_done: Indicator for charge termination |
| 500 | * @input_present: Indicator for input presence |
| 501 | * @qnovo_en: Indicator for Qnovo enable status |
| 502 | * |
| 503 | * Called by FG/QG driver when there is a state change (Charging status, SOC) |
| 504 | * |
| 505 | */ |
| 506 | void cap_learning_update(struct cap_learning *cl, int batt_temp, |
| 507 | int batt_soc, int charge_status, bool charge_done, |
| 508 | bool input_present, bool qnovo_en) |
| 509 | { |
| 510 | int rc, batt_soc_msb, batt_soc_prime; |
| 511 | bool prime_cc = false; |
| 512 | |
| 513 | if (!cl) |
| 514 | return; |
| 515 | |
| 516 | mutex_lock(&cl->lock); |
| 517 | |
| 518 | if (batt_temp > cl->dt.max_temp || batt_temp < cl->dt.min_temp || |
| 519 | !cl->learned_cap_uah) { |
| 520 | cl->active = false; |
| 521 | cl->init_cap_uah = 0; |
| 522 | goto out; |
| 523 | } |
| 524 | |
| 525 | batt_soc_msb = (u32)batt_soc >> 24; |
| 526 | pr_debug("Charge_status: %d active: %d batt_soc: %d\n", |
| 527 | charge_status, cl->active, batt_soc_msb); |
| 528 | |
| 529 | /* Initialize the starting point of learning capacity */ |
| 530 | if (!cl->active) { |
| 531 | if (charge_status == POWER_SUPPLY_STATUS_CHARGING) { |
| 532 | rc = cap_learning_begin(cl, batt_soc); |
| 533 | cl->active = (rc == 0); |
| 534 | } else { |
| 535 | if (charge_status == POWER_SUPPLY_STATUS_DISCHARGING || |
| 536 | charge_done) |
| 537 | prime_cc = true; |
| 538 | } |
| 539 | } else { |
| 540 | if (charge_done) { |
| 541 | rc = cap_learning_done(cl); |
| 542 | if (rc < 0) |
| 543 | pr_err("Error in completing capacity learning, rc=%d\n", |
| 544 | rc); |
| 545 | |
| 546 | cl->active = false; |
| 547 | cl->init_cap_uah = 0; |
| 548 | } |
| 549 | |
| 550 | if (charge_status == POWER_SUPPLY_STATUS_DISCHARGING) { |
| 551 | if (!input_present) { |
| 552 | pr_debug("Capacity learning aborted @ battery SOC %d\n", |
| 553 | batt_soc_msb); |
| 554 | cl->active = false; |
| 555 | cl->init_cap_uah = 0; |
| 556 | prime_cc = true; |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | if (charge_status == POWER_SUPPLY_STATUS_NOT_CHARGING) { |
| 561 | if (qnovo_en && input_present) { |
| 562 | /* |
| 563 | * Don't abort the capacity learning when qnovo |
| 564 | * is enabled and input is present where the |
| 565 | * charging status can go to "not charging" |
| 566 | * intermittently. |
| 567 | */ |
| 568 | } else { |
| 569 | pr_debug("Capacity learning aborted @ battery SOC %d\n", |
| 570 | batt_soc_msb); |
| 571 | cl->active = false; |
| 572 | cl->init_cap_uah = 0; |
| 573 | prime_cc = true; |
| 574 | } |
| 575 | } |
| 576 | } |
| 577 | |
| 578 | /* |
| 579 | * Prime CC_SOC_SW when the device is not charging or during charge |
| 580 | * termination when the capacity learning is not active. |
| 581 | */ |
| 582 | |
| 583 | if (prime_cc && cl->prime_cc_soc) { |
| 584 | if (charge_done) |
| 585 | batt_soc_prime = cl->cc_soc_max; |
| 586 | else |
| 587 | batt_soc_prime = batt_soc; |
| 588 | |
| 589 | rc = cl->prime_cc_soc(cl->data, batt_soc_prime); |
| 590 | if (rc < 0) |
| 591 | pr_err("Error in writing cc_soc_sw, rc=%d\n", |
| 592 | rc); |
| 593 | } |
| 594 | |
| 595 | out: |
| 596 | mutex_unlock(&cl->lock); |
| 597 | } |
| 598 | |
| 599 | /** |
| 600 | * cap_learning_abort - |
| 601 | * @cl: Capacity learning object |
| 602 | * |
| 603 | * Aborts the capacity learning and initializes variables |
| 604 | * |
| 605 | */ |
| 606 | void cap_learning_abort(struct cap_learning *cl) |
| 607 | { |
| 608 | if (!cl) |
| 609 | return; |
| 610 | |
| 611 | mutex_lock(&cl->lock); |
| 612 | pr_debug("Aborting cap_learning\n"); |
| 613 | cl->active = false; |
| 614 | cl->init_cap_uah = 0; |
| 615 | mutex_lock(&cl->lock); |
| 616 | } |
| 617 | |
| 618 | /** |
| 619 | * cap_learning_post_profile_init - |
| 620 | * @cl: Capacity learning object |
| 621 | * @nom_cap_uah: Nominal capacity of battery in uAh |
| 622 | * |
| 623 | * Called by FG/QG once the profile load is complete and nominal capacity |
| 624 | * of battery is known. This also gets the last learned capacity back from |
| 625 | * FG/QG to feed back to the algorithm. |
| 626 | * |
| 627 | */ |
| 628 | int cap_learning_post_profile_init(struct cap_learning *cl, int64_t nom_cap_uah) |
| 629 | { |
| 630 | int64_t delta_cap_uah, pct_nom_cap_uah; |
| 631 | int rc; |
| 632 | |
| 633 | if (!cl || !cl->data) |
| 634 | return -EINVAL; |
| 635 | |
| 636 | mutex_lock(&cl->lock); |
| 637 | cl->nom_cap_uah = nom_cap_uah; |
| 638 | rc = cl->get_learned_capacity(cl->data, &cl->learned_cap_uah); |
| 639 | if (rc < 0) { |
| 640 | pr_err("Couldn't get learned capacity, rc=%d\n", rc); |
| 641 | goto out; |
| 642 | } |
| 643 | |
| 644 | if (cl->learned_cap_uah != cl->nom_cap_uah) { |
| 645 | if (cl->learned_cap_uah == 0) |
| 646 | cl->learned_cap_uah = cl->nom_cap_uah; |
| 647 | |
| 648 | delta_cap_uah = abs(cl->learned_cap_uah - cl->nom_cap_uah); |
| 649 | pct_nom_cap_uah = div64_s64((int64_t)cl->nom_cap_uah * |
| 650 | CAPACITY_DELTA_DECIPCT, 1000); |
| 651 | /* |
| 652 | * If the learned capacity is out of range by 50% from the |
| 653 | * nominal capacity, then overwrite the learned capacity with |
| 654 | * the nominal capacity. |
| 655 | */ |
| 656 | if (cl->nom_cap_uah && delta_cap_uah > pct_nom_cap_uah) { |
| 657 | pr_debug("learned_cap_uah: %lld is higher than expected, capping it to nominal: %lld\n", |
| 658 | cl->learned_cap_uah, cl->nom_cap_uah); |
| 659 | cl->learned_cap_uah = cl->nom_cap_uah; |
| 660 | } |
| 661 | |
| 662 | rc = cl->store_learned_capacity(cl->data, cl->learned_cap_uah); |
| 663 | if (rc < 0) |
| 664 | pr_err("Error in storing learned_cap_uah, rc=%d\n", rc); |
| 665 | } |
| 666 | |
| 667 | out: |
| 668 | mutex_unlock(&cl->lock); |
| 669 | return rc; |
| 670 | } |
| 671 | |
| 672 | /** |
| 673 | * cap_learning_init - |
| 674 | * @cl: Capacity learning object |
| 675 | * |
| 676 | * FG/QG have to call this during driver probe to validate the required |
| 677 | * parameters after allocating cap_learning object. |
| 678 | * |
| 679 | */ |
| 680 | int cap_learning_init(struct cap_learning *cl) |
| 681 | { |
| 682 | if (!cl) |
| 683 | return -ENODEV; |
| 684 | |
| 685 | if (!cl->get_learned_capacity || !cl->store_learned_capacity || |
| 686 | !cl->get_cc_soc) { |
| 687 | pr_err("Insufficient functions for supporting capacity learning\n"); |
| 688 | return -EINVAL; |
| 689 | } |
| 690 | |
| 691 | if (!cl->cc_soc_max) { |
| 692 | pr_err("Insufficient parameters for supporting capacity learning\n"); |
| 693 | return -EINVAL; |
| 694 | } |
| 695 | |
| 696 | mutex_init(&cl->lock); |
| 697 | return 0; |
| 698 | } |
Vamshi Krishna B V | 90792c0 | 2018-05-28 22:47:06 +0530 | [diff] [blame] | 699 | |
| 700 | /* Time to full/empty algorithm helper functions */ |
| 701 | |
| 702 | static void ttf_circ_buf_add(struct ttf_circ_buf *buf, int val) |
| 703 | { |
| 704 | buf->arr[buf->head] = val; |
| 705 | buf->head = (buf->head + 1) % ARRAY_SIZE(buf->arr); |
| 706 | buf->size = min(++buf->size, (int)ARRAY_SIZE(buf->arr)); |
| 707 | } |
| 708 | |
| 709 | static void ttf_circ_buf_clr(struct ttf_circ_buf *buf) |
| 710 | { |
| 711 | buf->size = 0; |
| 712 | buf->head = 0; |
| 713 | memset(buf->arr, 0, sizeof(buf->arr)); |
| 714 | } |
| 715 | |
| 716 | static int cmp_int(const void *a, const void *b) |
| 717 | { |
| 718 | return *(int *)a - *(int *)b; |
| 719 | } |
| 720 | |
| 721 | static int ttf_circ_buf_median(struct ttf_circ_buf *buf, int *median) |
| 722 | { |
| 723 | int *temp; |
| 724 | |
| 725 | if (buf->size == 0) |
| 726 | return -ENODATA; |
| 727 | |
| 728 | if (buf->size == 1) { |
| 729 | *median = buf->arr[0]; |
| 730 | return 0; |
| 731 | } |
| 732 | |
| 733 | temp = kmalloc_array(buf->size, sizeof(*temp), GFP_KERNEL); |
| 734 | if (!temp) |
| 735 | return -ENOMEM; |
| 736 | |
| 737 | memcpy(temp, buf->arr, buf->size * sizeof(*temp)); |
| 738 | sort(temp, buf->size, sizeof(*temp), cmp_int, NULL); |
| 739 | |
| 740 | if (buf->size % 2) |
| 741 | *median = temp[buf->size / 2]; |
| 742 | else |
| 743 | *median = (temp[buf->size / 2 - 1] + temp[buf->size / 2]) / 2; |
| 744 | |
| 745 | kfree(temp); |
| 746 | return 0; |
| 747 | } |
| 748 | |
| 749 | static int ttf_lerp(const struct ttf_pt *pts, size_t tablesize, |
| 750 | s32 input, s32 *output) |
| 751 | { |
| 752 | int i; |
| 753 | s64 temp; |
| 754 | |
| 755 | if (pts == NULL) { |
| 756 | pr_err("Table is NULL\n"); |
| 757 | return -EINVAL; |
| 758 | } |
| 759 | |
| 760 | if (tablesize < 1) { |
| 761 | pr_err("Table has no entries\n"); |
| 762 | return -ENOENT; |
| 763 | } |
| 764 | |
| 765 | if (tablesize == 1) { |
| 766 | *output = pts[0].y; |
| 767 | return 0; |
| 768 | } |
| 769 | |
| 770 | if (pts[0].x > pts[1].x) { |
| 771 | pr_err("Table is not in acending order\n"); |
| 772 | return -EINVAL; |
| 773 | } |
| 774 | |
| 775 | if (input <= pts[0].x) { |
| 776 | *output = pts[0].y; |
| 777 | return 0; |
| 778 | } |
| 779 | |
| 780 | if (input >= pts[tablesize - 1].x) { |
| 781 | *output = pts[tablesize - 1].y; |
| 782 | return 0; |
| 783 | } |
| 784 | |
| 785 | for (i = 1; i < tablesize; i++) { |
| 786 | if (input >= pts[i].x) |
| 787 | continue; |
| 788 | |
| 789 | temp = ((s64)pts[i].y - pts[i - 1].y) * |
| 790 | ((s64)input - pts[i - 1].x); |
| 791 | temp = div_s64(temp, pts[i].x - pts[i - 1].x); |
| 792 | *output = temp + pts[i - 1].y; |
| 793 | return 0; |
| 794 | } |
| 795 | |
| 796 | return -EINVAL; |
| 797 | } |
| 798 | |
| 799 | static int get_time_to_full_locked(struct ttf *ttf, int *val) |
| 800 | { |
| 801 | int rc, ibatt_avg, vbatt_avg, rbatt = 0, msoc = 0, act_cap_mah = 0, |
| 802 | i_cc2cv = 0, soc_cc2cv, tau, divisor, iterm = 0, ttf_mode = 0, |
| 803 | i, soc_per_step, msoc_this_step, msoc_next_step, |
| 804 | ibatt_this_step, t_predicted_this_step, ttf_slope, |
| 805 | t_predicted_cv, t_predicted = 0, charge_type = 0, |
Anirudh Ghayal | 72c43f4 | 2018-06-25 16:16:41 +0530 | [diff] [blame] | 806 | float_volt_uv = 0, valid = 0, charge_status = 0; |
Vamshi Krishna B V | 90792c0 | 2018-05-28 22:47:06 +0530 | [diff] [blame] | 807 | s64 delta_ms; |
| 808 | |
Anirudh Ghayal | 72c43f4 | 2018-06-25 16:16:41 +0530 | [diff] [blame] | 809 | rc = ttf->get_ttf_param(ttf->data, TTF_VALID, &valid); |
| 810 | if (rc < 0) { |
| 811 | pr_err("failed to get ttf_valid rc=%d\n", rc); |
| 812 | return rc; |
| 813 | } |
| 814 | |
| 815 | if (!valid) { |
| 816 | *val = -EINVAL; |
| 817 | return 0; |
| 818 | } |
| 819 | |
| 820 | rc = ttf->get_ttf_param(ttf->data, TTF_CHG_STATUS, &charge_status); |
| 821 | if (rc < 0) { |
| 822 | pr_err("failed to get charge-status rc=%d\n", rc); |
| 823 | return rc; |
| 824 | } |
| 825 | |
| 826 | if (charge_status != POWER_SUPPLY_STATUS_CHARGING) { |
| 827 | *val = -EINVAL; |
| 828 | return 0; |
| 829 | } |
| 830 | |
Vamshi Krishna B V | 90792c0 | 2018-05-28 22:47:06 +0530 | [diff] [blame] | 831 | rc = ttf->get_ttf_param(ttf->data, TTF_MSOC, &msoc); |
| 832 | if (rc < 0) { |
| 833 | pr_err("failed to get msoc rc=%d\n", rc); |
| 834 | return rc; |
| 835 | } |
| 836 | pr_debug("TTF: msoc=%d\n", msoc); |
| 837 | |
| 838 | /* the battery is considered full if the SOC is 100% */ |
| 839 | if (msoc >= 100) { |
| 840 | *val = 0; |
| 841 | return 0; |
| 842 | } |
| 843 | |
| 844 | rc = ttf->get_ttf_param(ttf->data, TTF_MODE, &ttf_mode); |
| 845 | |
| 846 | /* when switching TTF algorithms the TTF needs to be reset */ |
| 847 | if (ttf->mode != ttf_mode) { |
| 848 | ttf_circ_buf_clr(&ttf->ibatt); |
| 849 | ttf_circ_buf_clr(&ttf->vbatt); |
| 850 | ttf->last_ttf = 0; |
| 851 | ttf->last_ms = 0; |
| 852 | ttf->mode = ttf_mode; |
| 853 | } |
| 854 | |
| 855 | /* at least 10 samples are required to produce a stable IBATT */ |
| 856 | if (ttf->ibatt.size < MAX_TTF_SAMPLES) { |
| 857 | *val = -1; |
| 858 | return 0; |
| 859 | } |
| 860 | |
| 861 | rc = ttf_circ_buf_median(&ttf->ibatt, &ibatt_avg); |
| 862 | if (rc < 0) { |
| 863 | pr_err("failed to get IBATT AVG rc=%d\n", rc); |
| 864 | return rc; |
| 865 | } |
| 866 | |
| 867 | rc = ttf_circ_buf_median(&ttf->vbatt, &vbatt_avg); |
| 868 | if (rc < 0) { |
| 869 | pr_err("failed to get VBATT AVG rc=%d\n", rc); |
| 870 | return rc; |
| 871 | } |
| 872 | |
| 873 | ibatt_avg = -ibatt_avg / MILLI_UNIT; |
| 874 | vbatt_avg /= MILLI_UNIT; |
| 875 | |
| 876 | rc = ttf->get_ttf_param(ttf->data, TTF_ITERM, &iterm); |
| 877 | if (rc < 0) { |
| 878 | pr_err("failed to get iterm rc=%d\n", rc); |
| 879 | return rc; |
| 880 | } |
| 881 | /* clamp ibatt_avg to iterm */ |
| 882 | if (ibatt_avg < abs(iterm)) |
| 883 | ibatt_avg = abs(iterm); |
| 884 | |
| 885 | rc = ttf->get_ttf_param(ttf->data, TTF_RBATT, &rbatt); |
| 886 | if (rc < 0) { |
| 887 | pr_err("failed to get battery resistance rc=%d\n", rc); |
| 888 | return rc; |
| 889 | } |
| 890 | rbatt /= MILLI_UNIT; |
| 891 | |
| 892 | rc = ttf->get_ttf_param(ttf->data, TTF_FCC, &act_cap_mah); |
| 893 | if (rc < 0) { |
| 894 | pr_err("failed to get ACT_BATT_CAP rc=%d\n", rc); |
| 895 | return rc; |
| 896 | } |
| 897 | |
| 898 | pr_debug(" TTF: ibatt_avg=%d vbatt_avg=%d rbatt=%d act_cap_mah=%d\n", |
| 899 | ibatt_avg, vbatt_avg, rbatt, act_cap_mah); |
| 900 | |
| 901 | rc = ttf->get_ttf_param(ttf->data, TTF_VFLOAT, &float_volt_uv); |
| 902 | if (rc < 0) { |
| 903 | pr_err("failed to get float_volt_uv rc=%d\n", rc); |
| 904 | return rc; |
| 905 | } |
| 906 | |
| 907 | rc = ttf->get_ttf_param(ttf->data, TTF_CHG_TYPE, &charge_type); |
| 908 | if (rc < 0) { |
| 909 | pr_err("failed to get charge_type rc=%d\n", rc); |
| 910 | return rc; |
| 911 | } |
| 912 | /* estimated battery current at the CC to CV transition */ |
| 913 | switch (ttf->mode) { |
| 914 | case TTF_MODE_NORMAL: |
| 915 | i_cc2cv = ibatt_avg * vbatt_avg / |
| 916 | max(MILLI_UNIT, float_volt_uv / MILLI_UNIT); |
| 917 | break; |
| 918 | case TTF_MODE_QNOVO: |
| 919 | i_cc2cv = min( |
| 920 | ttf->cc_step.arr[MAX_CC_STEPS - 1] / MILLI_UNIT, |
| 921 | ibatt_avg * vbatt_avg / |
| 922 | max(MILLI_UNIT, float_volt_uv / MILLI_UNIT)); |
| 923 | break; |
| 924 | default: |
| 925 | pr_err("TTF mode %d is not supported\n", ttf->mode); |
| 926 | break; |
| 927 | } |
| 928 | pr_debug("TTF: i_cc2cv=%d\n", i_cc2cv); |
| 929 | |
| 930 | /* if we are already in CV state then we can skip estimating CC */ |
| 931 | if (charge_type == POWER_SUPPLY_CHARGE_TYPE_TAPER) |
| 932 | goto cv_estimate; |
| 933 | |
| 934 | /* estimated SOC at the CC to CV transition */ |
| 935 | soc_cc2cv = DIV_ROUND_CLOSEST(rbatt * i_cc2cv, OCV_SLOPE_UV); |
| 936 | soc_cc2cv = 100 - soc_cc2cv; |
| 937 | pr_debug("TTF: soc_cc2cv=%d\n", soc_cc2cv); |
| 938 | |
| 939 | switch (ttf->mode) { |
| 940 | case TTF_MODE_NORMAL: |
| 941 | if (soc_cc2cv - msoc <= 0) |
| 942 | goto cv_estimate; |
| 943 | |
| 944 | divisor = max(100, (ibatt_avg + i_cc2cv) / 2 * 100); |
| 945 | t_predicted = div_s64((s64)act_cap_mah * (soc_cc2cv - msoc) * |
| 946 | HOURS_TO_SECONDS, divisor); |
| 947 | break; |
| 948 | case TTF_MODE_QNOVO: |
| 949 | soc_per_step = 100 / MAX_CC_STEPS; |
| 950 | for (i = msoc / soc_per_step; i < MAX_CC_STEPS - 1; ++i) { |
| 951 | msoc_next_step = (i + 1) * soc_per_step; |
| 952 | if (i == msoc / soc_per_step) |
| 953 | msoc_this_step = msoc; |
| 954 | else |
| 955 | msoc_this_step = i * soc_per_step; |
| 956 | |
| 957 | /* scale ibatt by 85% to account for discharge pulses */ |
| 958 | ibatt_this_step = min( |
| 959 | ttf->cc_step.arr[i] / MILLI_UNIT, |
| 960 | ibatt_avg) * 85 / 100; |
| 961 | divisor = max(100, ibatt_this_step * 100); |
| 962 | t_predicted_this_step = div_s64((s64)act_cap_mah * |
| 963 | (msoc_next_step - msoc_this_step) * |
| 964 | HOURS_TO_SECONDS, divisor); |
| 965 | t_predicted += t_predicted_this_step; |
| 966 | pr_debug("TTF: [%d, %d] ma=%d t=%d\n", |
| 967 | msoc_this_step, msoc_next_step, |
| 968 | ibatt_this_step, t_predicted_this_step); |
| 969 | } |
| 970 | break; |
| 971 | default: |
| 972 | pr_err("TTF mode %d is not supported\n", ttf->mode); |
| 973 | break; |
| 974 | } |
| 975 | |
| 976 | cv_estimate: |
| 977 | pr_debug("TTF: t_predicted_cc=%d\n", t_predicted); |
| 978 | |
| 979 | iterm = max(100, abs(iterm) + ttf->iterm_delta); |
| 980 | pr_debug("TTF: iterm=%d\n", iterm); |
| 981 | |
| 982 | if (charge_type == POWER_SUPPLY_CHARGE_TYPE_TAPER) |
| 983 | tau = max(MILLI_UNIT, ibatt_avg * MILLI_UNIT / iterm); |
| 984 | else |
| 985 | tau = max(MILLI_UNIT, i_cc2cv * MILLI_UNIT / iterm); |
| 986 | |
| 987 | rc = ttf_lerp(ttf_ln_table, ARRAY_SIZE(ttf_ln_table), tau, &tau); |
| 988 | if (rc < 0) { |
| 989 | pr_err("failed to interpolate tau rc=%d\n", rc); |
| 990 | return rc; |
| 991 | } |
| 992 | |
| 993 | /* tau is scaled linearly from 95% to 100% SOC */ |
| 994 | if (msoc >= 95) |
| 995 | tau = tau * 2 * (100 - msoc) / 10; |
| 996 | |
| 997 | pr_debug("TTF: tau=%d\n", tau); |
| 998 | t_predicted_cv = div_s64((s64)act_cap_mah * rbatt * tau * |
| 999 | HOURS_TO_SECONDS, NANO_UNIT); |
| 1000 | pr_debug("TTF: t_predicted_cv=%d\n", t_predicted_cv); |
| 1001 | t_predicted += t_predicted_cv; |
| 1002 | |
| 1003 | pr_debug("TTF: t_predicted_prefilter=%d\n", t_predicted); |
| 1004 | if (ttf->last_ms != 0) { |
| 1005 | delta_ms = ktime_ms_delta(ktime_get_boottime(), |
| 1006 | ms_to_ktime(ttf->last_ms)); |
| 1007 | if (delta_ms > 10000) { |
| 1008 | ttf_slope = div64_s64( |
| 1009 | ((s64)t_predicted - ttf->last_ttf) * |
| 1010 | MICRO_UNIT, delta_ms); |
| 1011 | if (ttf_slope > -100) |
| 1012 | ttf_slope = -100; |
| 1013 | else if (ttf_slope < -2000) |
| 1014 | ttf_slope = -2000; |
| 1015 | |
| 1016 | t_predicted = div_s64( |
| 1017 | (s64)ttf_slope * delta_ms, MICRO_UNIT) + |
| 1018 | ttf->last_ttf; |
| 1019 | pr_debug("TTF: ttf_slope=%d\n", ttf_slope); |
| 1020 | } else { |
| 1021 | t_predicted = ttf->last_ttf; |
| 1022 | } |
| 1023 | } |
| 1024 | |
| 1025 | /* clamp the ttf to 0 */ |
| 1026 | if (t_predicted < 0) |
| 1027 | t_predicted = 0; |
| 1028 | |
| 1029 | pr_debug("TTF: t_predicted_postfilter=%d\n", t_predicted); |
| 1030 | *val = t_predicted; |
| 1031 | return 0; |
| 1032 | } |
| 1033 | |
| 1034 | /** |
| 1035 | * ttf_get_time_to_full - |
| 1036 | * @ttf: ttf object |
| 1037 | * @val: Average time to full returned to the caller |
| 1038 | * |
| 1039 | * Get Average time to full the battery based on current soc, rbatt |
| 1040 | * battery voltage and charge current etc. |
| 1041 | */ |
| 1042 | int ttf_get_time_to_full(struct ttf *ttf, int *val) |
| 1043 | { |
| 1044 | int rc; |
| 1045 | |
| 1046 | mutex_lock(&ttf->lock); |
| 1047 | rc = get_time_to_full_locked(ttf, val); |
| 1048 | mutex_unlock(&ttf->lock); |
| 1049 | |
| 1050 | return rc; |
| 1051 | } |
| 1052 | |
| 1053 | static void ttf_work(struct work_struct *work) |
| 1054 | { |
| 1055 | struct ttf *ttf = container_of(work, |
| 1056 | struct ttf, ttf_work.work); |
| 1057 | int rc, ibatt_now, vbatt_now, ttf_now, charge_status; |
Vamshi Krishna B V | 22af4a5 | 2018-12-18 15:39:24 +0530 | [diff] [blame] | 1058 | int valid = 0; |
Vamshi Krishna B V | 90792c0 | 2018-05-28 22:47:06 +0530 | [diff] [blame] | 1059 | ktime_t ktime_now; |
| 1060 | |
| 1061 | mutex_lock(&ttf->lock); |
Vamshi Krishna B V | 22af4a5 | 2018-12-18 15:39:24 +0530 | [diff] [blame] | 1062 | rc = ttf->get_ttf_param(ttf->data, TTF_VALID, &valid); |
| 1063 | if (rc < 0) { |
| 1064 | pr_err("failed to get ttf_valid rc=%d\n", rc); |
| 1065 | goto end_work; |
| 1066 | } |
| 1067 | |
| 1068 | if (!valid) |
| 1069 | goto end_work; |
| 1070 | |
Vamshi Krishna B V | 90792c0 | 2018-05-28 22:47:06 +0530 | [diff] [blame] | 1071 | rc = ttf->get_ttf_param(ttf->data, TTF_CHG_STATUS, &charge_status); |
| 1072 | if (rc < 0) { |
| 1073 | pr_err("failed to get charge_status rc=%d\n", rc); |
| 1074 | goto end_work; |
| 1075 | } |
| 1076 | if (charge_status != POWER_SUPPLY_STATUS_CHARGING && |
| 1077 | charge_status != POWER_SUPPLY_STATUS_DISCHARGING) |
| 1078 | goto end_work; |
| 1079 | |
| 1080 | rc = ttf->get_ttf_param(ttf->data, TTF_IBAT, &ibatt_now); |
| 1081 | if (rc < 0) { |
| 1082 | pr_err("failed to get battery current, rc=%d\n", rc); |
| 1083 | goto end_work; |
| 1084 | } |
| 1085 | |
| 1086 | rc = ttf->get_ttf_param(ttf->data, TTF_VBAT, &vbatt_now); |
| 1087 | if (rc < 0) { |
| 1088 | pr_err("failed to get battery voltage, rc=%d\n", rc); |
| 1089 | goto end_work; |
| 1090 | } |
| 1091 | |
| 1092 | ttf_circ_buf_add(&ttf->ibatt, ibatt_now); |
| 1093 | ttf_circ_buf_add(&ttf->vbatt, vbatt_now); |
| 1094 | |
| 1095 | if (charge_status == POWER_SUPPLY_STATUS_CHARGING) { |
| 1096 | rc = get_time_to_full_locked(ttf, &ttf_now); |
| 1097 | if (rc < 0) { |
| 1098 | pr_err("failed to get ttf, rc=%d\n", rc); |
| 1099 | goto end_work; |
| 1100 | } |
| 1101 | |
| 1102 | /* keep the wake lock and prime the IBATT and VBATT buffers */ |
| 1103 | if (ttf_now < 0) { |
| 1104 | /* delay for one FG cycle */ |
| 1105 | schedule_delayed_work(&ttf->ttf_work, |
| 1106 | msecs_to_jiffies(1000)); |
| 1107 | mutex_unlock(&ttf->lock); |
| 1108 | return; |
| 1109 | } |
| 1110 | |
| 1111 | /* update the TTF reference point every minute */ |
| 1112 | ktime_now = ktime_get_boottime(); |
| 1113 | if (ktime_ms_delta(ktime_now, |
| 1114 | ms_to_ktime(ttf->last_ms)) > 60000 || |
| 1115 | ttf->last_ms == 0) { |
| 1116 | ttf->last_ttf = ttf_now; |
| 1117 | ttf->last_ms = ktime_to_ms(ktime_now); |
| 1118 | } |
| 1119 | } |
| 1120 | |
| 1121 | /* recurse every 10 seconds */ |
| 1122 | schedule_delayed_work(&ttf->ttf_work, msecs_to_jiffies(ttf->period_ms)); |
| 1123 | end_work: |
| 1124 | ttf->awake_voter(ttf->data, false); |
| 1125 | mutex_unlock(&ttf->lock); |
| 1126 | } |
| 1127 | |
| 1128 | /** |
| 1129 | * ttf_get_time_to_empty - |
| 1130 | * @ttf: ttf object |
| 1131 | * @val: Average time to empty returned to the caller |
| 1132 | * |
| 1133 | * Get Average time to empty the battery based on current soc |
| 1134 | * and average battery current. |
| 1135 | */ |
| 1136 | int ttf_get_time_to_empty(struct ttf *ttf, int *val) |
| 1137 | { |
Anirudh Ghayal | 72c43f4 | 2018-06-25 16:16:41 +0530 | [diff] [blame] | 1138 | int rc, ibatt_avg, msoc, act_cap_mah, divisor, valid = 0, |
| 1139 | charge_status = 0; |
| 1140 | |
| 1141 | rc = ttf->get_ttf_param(ttf->data, TTF_VALID, &valid); |
| 1142 | if (rc < 0) { |
| 1143 | pr_err("failed to get ttf_valid rc=%d\n", rc); |
| 1144 | return rc; |
| 1145 | } |
| 1146 | |
| 1147 | if (!valid) { |
| 1148 | *val = -EINVAL; |
| 1149 | return 0; |
| 1150 | } |
| 1151 | |
| 1152 | rc = ttf->get_ttf_param(ttf->data, TTF_CHG_STATUS, &charge_status); |
| 1153 | if (rc < 0) { |
| 1154 | pr_err("failed to get charge-status rc=%d\n", rc); |
| 1155 | return rc; |
| 1156 | } |
| 1157 | |
| 1158 | if (charge_status == POWER_SUPPLY_STATUS_CHARGING) { |
| 1159 | *val = -EINVAL; |
| 1160 | return 0; |
| 1161 | } |
Vamshi Krishna B V | 90792c0 | 2018-05-28 22:47:06 +0530 | [diff] [blame] | 1162 | |
| 1163 | rc = ttf_circ_buf_median(&ttf->ibatt, &ibatt_avg); |
| 1164 | if (rc < 0) { |
| 1165 | /* try to get instantaneous current */ |
| 1166 | rc = ttf->get_ttf_param(ttf->data, TTF_IBAT, &ibatt_avg); |
| 1167 | if (rc < 0) { |
| 1168 | pr_err("failed to get battery current, rc=%d\n", rc); |
| 1169 | return rc; |
| 1170 | } |
| 1171 | } |
| 1172 | |
| 1173 | ibatt_avg /= MILLI_UNIT; |
| 1174 | /* clamp ibatt_avg to 100mA */ |
| 1175 | if (ibatt_avg < 100) |
| 1176 | ibatt_avg = 100; |
| 1177 | |
| 1178 | rc = ttf->get_ttf_param(ttf->data, TTF_MSOC, &msoc); |
| 1179 | if (rc < 0) { |
| 1180 | pr_err("Error in getting capacity, rc=%d\n", rc); |
| 1181 | return rc; |
| 1182 | } |
| 1183 | |
| 1184 | rc = ttf->get_ttf_param(ttf->data, TTF_FCC, &act_cap_mah); |
| 1185 | if (rc < 0) { |
| 1186 | pr_err("Error in getting ACT_BATT_CAP, rc=%d\n", rc); |
| 1187 | return rc; |
| 1188 | } |
| 1189 | |
| 1190 | divisor = CENTI_ICORRECT_C0 * 100 + CENTI_ICORRECT_C1 * msoc; |
| 1191 | divisor = ibatt_avg * divisor / 100; |
| 1192 | divisor = max(100, divisor); |
| 1193 | *val = act_cap_mah * msoc * HOURS_TO_SECONDS / divisor; |
Anirudh Ghayal | 72c43f4 | 2018-06-25 16:16:41 +0530 | [diff] [blame] | 1194 | |
| 1195 | pr_debug("TTF: ibatt_avg=%d msoc=%d act_cap_mah=%d TTE=%d\n", |
| 1196 | ibatt_avg, msoc, act_cap_mah, *val); |
| 1197 | |
Vamshi Krishna B V | 90792c0 | 2018-05-28 22:47:06 +0530 | [diff] [blame] | 1198 | return 0; |
| 1199 | } |
| 1200 | |
| 1201 | /** |
| 1202 | * ttf_update - |
| 1203 | * @ttf: ttf object |
| 1204 | * @input_present: Indicator for input presence |
| 1205 | * |
| 1206 | * Called by FG/QG driver when there is a state change (Charging status, SOC) |
| 1207 | * |
| 1208 | */ |
| 1209 | void ttf_update(struct ttf *ttf, bool input_present) |
| 1210 | { |
Vamshi Krishna B V | 22af4a5 | 2018-12-18 15:39:24 +0530 | [diff] [blame] | 1211 | int delay_ms, rc, valid = 0; |
| 1212 | |
| 1213 | rc = ttf->get_ttf_param(ttf->data, TTF_VALID, &valid); |
| 1214 | if (rc < 0) { |
| 1215 | pr_err("failed to get ttf_valid rc=%d\n", rc); |
| 1216 | return; |
| 1217 | } |
| 1218 | |
| 1219 | if (!valid) |
| 1220 | return; |
Vamshi Krishna B V | 90792c0 | 2018-05-28 22:47:06 +0530 | [diff] [blame] | 1221 | |
| 1222 | if (ttf->input_present == input_present) |
| 1223 | return; |
| 1224 | |
| 1225 | ttf->input_present = input_present; |
| 1226 | if (input_present) |
| 1227 | /* wait 35 seconds for the input to settle */ |
| 1228 | delay_ms = 35000; |
| 1229 | else |
| 1230 | /* wait 5 seconds for current to settle during discharge */ |
| 1231 | delay_ms = 5000; |
| 1232 | |
| 1233 | ttf->awake_voter(ttf->data, true); |
| 1234 | cancel_delayed_work_sync(&ttf->ttf_work); |
| 1235 | mutex_lock(&ttf->lock); |
| 1236 | ttf_circ_buf_clr(&ttf->ibatt); |
| 1237 | ttf_circ_buf_clr(&ttf->vbatt); |
| 1238 | ttf->last_ttf = 0; |
| 1239 | ttf->last_ms = 0; |
| 1240 | mutex_unlock(&ttf->lock); |
| 1241 | schedule_delayed_work(&ttf->ttf_work, msecs_to_jiffies(delay_ms)); |
| 1242 | } |
| 1243 | |
| 1244 | /** |
| 1245 | * ttf_tte_init - |
| 1246 | * @ttf: Time to full object |
| 1247 | * |
| 1248 | * FG/QG have to call this during driver probe to validate the required |
| 1249 | * parameters after allocating ttf object. |
| 1250 | * |
| 1251 | */ |
| 1252 | int ttf_tte_init(struct ttf *ttf) |
| 1253 | { |
| 1254 | if (!ttf) |
| 1255 | return -ENODEV; |
| 1256 | |
| 1257 | if (!ttf->awake_voter || !ttf->get_ttf_param) { |
| 1258 | pr_err("Insufficient functions for supporting ttf\n"); |
| 1259 | return -EINVAL; |
| 1260 | } |
| 1261 | |
| 1262 | if (!ttf->iterm_delta) |
| 1263 | ttf->iterm_delta = DEFAULT_TTF_ITERM_DELTA_MA; |
| 1264 | if (!ttf->period_ms) |
| 1265 | ttf->period_ms = DEFAULT_TTF_RUN_PERIOD_MS; |
| 1266 | |
| 1267 | mutex_init(&ttf->lock); |
| 1268 | INIT_DELAYED_WORK(&ttf->ttf_work, ttf_work); |
| 1269 | |
| 1270 | return 0; |
| 1271 | } |