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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Batttery Driver for Dialog DA9052 PMICs4 *5 * Copyright(c) 2011 Dialog Semiconductor Ltd.6 *7 * Author: David Dajun Chen <dchen@diasemi.com>8 */9 10#include <linux/delay.h>11#include <linux/freezer.h>12#include <linux/fs.h>13#include <linux/jiffies.h>14#include <linux/module.h>15#include <linux/timer.h>16#include <linux/uaccess.h>17#include <linux/platform_device.h>18#include <linux/power_supply.h>19 20#include <linux/mfd/da9052/da9052.h>21#include <linux/mfd/da9052/pdata.h>22#include <linux/mfd/da9052/reg.h>23 24/* STATIC CONFIGURATION */25#define DA9052_BAT_CUTOFF_VOLT 280026#define DA9052_BAT_TSH 6200027#define DA9052_BAT_LOW_CAP 428#define DA9052_AVG_SZ 429#define DA9052_VC_TBL_SZ 6830#define DA9052_VC_TBL_REF_SZ 331 32#define DA9052_ISET_USB_MASK 0x0F33#define DA9052_CHG_USB_ILIM_MASK 0x4034#define DA9052_CHG_LIM_COLS 1635 36#define DA9052_MEAN(x, y) ((x + y) / 2)37 38enum charger_type_enum {39 DA9052_NOCHARGER = 1,40 DA9052_CHARGER,41};42 43static const u16 da9052_chg_current_lim[2][DA9052_CHG_LIM_COLS] = {44 {70, 80, 90, 100, 110, 120, 400, 450,45 500, 550, 600, 650, 700, 900, 1100, 1300},46 {80, 90, 100, 110, 120, 400, 450, 500,47 550, 600, 800, 1000, 1200, 1400, 1600, 1800},48};49 50static const u16 vc_tbl_ref[3] = {10, 25, 40};51/* Lookup table for voltage vs capacity */52static u32 const vc_tbl[3][68][2] = {53 /* For temperature 10 degree Celsius */54 {55 {4082, 100}, {4036, 98},56 {4020, 96}, {4008, 95},57 {3997, 93}, {3983, 91},58 {3964, 90}, {3943, 88},59 {3926, 87}, {3912, 85},60 {3900, 84}, {3890, 82},61 {3881, 80}, {3873, 79},62 {3865, 77}, {3857, 76},63 {3848, 74}, {3839, 73},64 {3829, 71}, {3820, 70},65 {3811, 68}, {3802, 67},66 {3794, 65}, {3785, 64},67 {3778, 62}, {3770, 61},68 {3763, 59}, {3756, 58},69 {3750, 56}, {3744, 55},70 {3738, 53}, {3732, 52},71 {3727, 50}, {3722, 49},72 {3717, 47}, {3712, 46},73 {3708, 44}, {3703, 43},74 {3700, 41}, {3696, 40},75 {3693, 38}, {3691, 37},76 {3688, 35}, {3686, 34},77 {3683, 32}, {3681, 31},78 {3678, 29}, {3675, 28},79 {3672, 26}, {3669, 25},80 {3665, 23}, {3661, 22},81 {3656, 21}, {3651, 19},82 {3645, 18}, {3639, 16},83 {3631, 15}, {3622, 13},84 {3611, 12}, {3600, 10},85 {3587, 9}, {3572, 7},86 {3548, 6}, {3503, 5},87 {3420, 3}, {3268, 2},88 {2992, 1}, {2746, 0}89 },90 /* For temperature 25 degree Celsius */91 {92 {4102, 100}, {4065, 98},93 {4048, 96}, {4034, 95},94 {4021, 93}, {4011, 92},95 {4001, 90}, {3986, 88},96 {3968, 87}, {3952, 85},97 {3938, 84}, {3926, 82},98 {3916, 81}, {3908, 79},99 {3900, 77}, {3892, 76},100 {3883, 74}, {3874, 73},101 {3864, 71}, {3855, 70},102 {3846, 68}, {3836, 67},103 {3827, 65}, {3819, 64},104 {3810, 62}, {3801, 61},105 {3793, 59}, {3786, 58},106 {3778, 56}, {3772, 55},107 {3765, 53}, {3759, 52},108 {3754, 50}, {3748, 49},109 {3743, 47}, {3738, 46},110 {3733, 44}, {3728, 43},111 {3724, 41}, {3720, 40},112 {3716, 38}, {3712, 37},113 {3709, 35}, {3706, 34},114 {3703, 33}, {3701, 31},115 {3698, 30}, {3696, 28},116 {3693, 27}, {3690, 25},117 {3687, 24}, {3683, 22},118 {3680, 21}, {3675, 19},119 {3671, 18}, {3666, 17},120 {3660, 15}, {3654, 14},121 {3647, 12}, {3639, 11},122 {3630, 9}, {3621, 8},123 {3613, 6}, {3606, 5},124 {3597, 4}, {3582, 2},125 {3546, 1}, {2747, 0}126 },127 /* For temperature 40 degree Celsius */128 {129 {4114, 100}, {4081, 98},130 {4065, 96}, {4050, 95},131 {4036, 93}, {4024, 92},132 {4013, 90}, {4002, 88},133 {3990, 87}, {3976, 85},134 {3962, 84}, {3950, 82},135 {3939, 81}, {3930, 79},136 {3921, 77}, {3912, 76},137 {3902, 74}, {3893, 73},138 {3883, 71}, {3874, 70},139 {3865, 68}, {3856, 67},140 {3847, 65}, {3838, 64},141 {3829, 62}, {3820, 61},142 {3812, 59}, {3803, 58},143 {3795, 56}, {3787, 55},144 {3780, 53}, {3773, 52},145 {3767, 50}, {3761, 49},146 {3756, 47}, {3751, 46},147 {3746, 44}, {3741, 43},148 {3736, 41}, {3732, 40},149 {3728, 38}, {3724, 37},150 {3720, 35}, {3716, 34},151 {3713, 33}, {3710, 31},152 {3707, 30}, {3704, 28},153 {3701, 27}, {3698, 25},154 {3695, 24}, {3691, 22},155 {3686, 21}, {3681, 19},156 {3676, 18}, {3671, 17},157 {3666, 15}, {3661, 14},158 {3655, 12}, {3648, 11},159 {3640, 9}, {3632, 8},160 {3622, 6}, {3616, 5},161 {3611, 4}, {3604, 2},162 {3594, 1}, {2747, 0}163 }164};165 166struct da9052_battery {167 struct da9052 *da9052;168 struct power_supply *psy;169 struct notifier_block nb;170 int charger_type;171 int status;172 int health;173};174 175static inline int volt_reg_to_mV(int value)176{177 return ((value * 1000) / 512) + 2500;178}179 180static inline int ichg_reg_to_mA(int value)181{182 return (value * 3900) / 1000;183}184 185static int da9052_read_chgend_current(struct da9052_battery *bat,186 int *current_mA)187{188 int ret;189 190 if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING)191 return -EINVAL;192 193 ret = da9052_reg_read(bat->da9052, DA9052_ICHG_END_REG);194 if (ret < 0)195 return ret;196 197 *current_mA = ichg_reg_to_mA(ret & DA9052_ICHGEND_ICHGEND);198 199 return 0;200}201 202static int da9052_read_chg_current(struct da9052_battery *bat, int *current_mA)203{204 int ret;205 206 if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING)207 return -EINVAL;208 209 ret = da9052_reg_read(bat->da9052, DA9052_ICHG_AV_REG);210 if (ret < 0)211 return ret;212 213 *current_mA = ichg_reg_to_mA(ret & DA9052_ICHGAV_ICHGAV);214 215 return 0;216}217 218static int da9052_bat_check_status(struct da9052_battery *bat, int *status)219{220 u8 v[2] = {0, 0};221 u8 bat_status;222 u8 chg_end;223 int ret;224 int chg_current;225 int chg_end_current;226 bool dcinsel;227 bool dcindet;228 bool vbussel;229 bool vbusdet;230 bool dc;231 bool vbus;232 233 ret = da9052_group_read(bat->da9052, DA9052_STATUS_A_REG, 2, v);234 if (ret < 0)235 return ret;236 237 bat_status = v[0];238 chg_end = v[1];239 240 dcinsel = bat_status & DA9052_STATUSA_DCINSEL;241 dcindet = bat_status & DA9052_STATUSA_DCINDET;242 vbussel = bat_status & DA9052_STATUSA_VBUSSEL;243 vbusdet = bat_status & DA9052_STATUSA_VBUSDET;244 dc = dcinsel && dcindet;245 vbus = vbussel && vbusdet;246 247 /* Preference to WALL(DCIN) charger unit */248 if (dc || vbus) {249 bat->charger_type = DA9052_CHARGER;250 251 /* If charging end flag is set and Charging current is greater252 * than charging end limit then battery is charging253 */254 if ((chg_end & DA9052_STATUSB_CHGEND) != 0) {255 ret = da9052_read_chg_current(bat, &chg_current);256 if (ret < 0)257 return ret;258 ret = da9052_read_chgend_current(bat, &chg_end_current);259 if (ret < 0)260 return ret;261 262 if (chg_current >= chg_end_current)263 bat->status = POWER_SUPPLY_STATUS_CHARGING;264 else265 bat->status = POWER_SUPPLY_STATUS_NOT_CHARGING;266 } else {267 /* If Charging end flag is cleared then battery is268 * charging269 */270 bat->status = POWER_SUPPLY_STATUS_CHARGING;271 }272 } else if (dcindet || vbusdet) {273 bat->charger_type = DA9052_CHARGER;274 bat->status = POWER_SUPPLY_STATUS_NOT_CHARGING;275 } else {276 bat->charger_type = DA9052_NOCHARGER;277 bat->status = POWER_SUPPLY_STATUS_DISCHARGING;278 }279 280 if (status != NULL)281 *status = bat->status;282 return 0;283}284 285static int da9052_bat_read_volt(struct da9052_battery *bat, int *volt_mV)286{287 int volt;288 289 volt = da9052_adc_manual_read(bat->da9052, DA9052_ADC_MAN_MUXSEL_VBAT);290 if (volt < 0)291 return volt;292 293 *volt_mV = volt_reg_to_mV(volt);294 295 return 0;296}297 298static int da9052_bat_check_presence(struct da9052_battery *bat, int *illegal)299{300 int bat_temp;301 302 bat_temp = da9052_adc_read_temp(bat->da9052);303 if (bat_temp < 0)304 return bat_temp;305 306 if (bat_temp > DA9052_BAT_TSH)307 *illegal = 1;308 else309 *illegal = 0;310 311 return 0;312}313 314static int da9052_bat_interpolate(int vbat_lower, int vbat_upper,315 int level_lower, int level_upper,316 int bat_voltage)317{318 int tmp;319 320 tmp = ((level_upper - level_lower) * 1000) / (vbat_upper - vbat_lower);321 tmp = level_lower + (((bat_voltage - vbat_lower) * tmp) / 1000);322 323 return tmp;324}325 326static unsigned char da9052_determine_vc_tbl_index(unsigned char adc_temp)327{328 int i;329 330 if (adc_temp <= vc_tbl_ref[0])331 return 0;332 333 if (adc_temp > vc_tbl_ref[DA9052_VC_TBL_REF_SZ - 1])334 return DA9052_VC_TBL_REF_SZ - 1;335 336 for (i = 0; i < DA9052_VC_TBL_REF_SZ - 1; i++) {337 if ((adc_temp > vc_tbl_ref[i]) &&338 (adc_temp <= DA9052_MEAN(vc_tbl_ref[i], vc_tbl_ref[i + 1])))339 return i;340 if ((adc_temp > DA9052_MEAN(vc_tbl_ref[i], vc_tbl_ref[i + 1]))341 && (adc_temp <= vc_tbl_ref[i]))342 return i + 1;343 }344 /*345 * For some reason authors of the driver didn't presume that we can346 * end up here. It might be OK, but might be not, no one knows for347 * sure. Go check your battery, is it on fire?348 */349 WARN_ON(1);350 return 0;351}352 353static int da9052_bat_read_capacity(struct da9052_battery *bat, int *capacity)354{355 int adc_temp;356 int bat_voltage;357 int vbat_lower;358 int vbat_upper;359 int level_upper;360 int level_lower;361 int ret;362 int flag;363 int i = 0;364 int j;365 366 ret = da9052_bat_read_volt(bat, &bat_voltage);367 if (ret < 0)368 return ret;369 370 adc_temp = da9052_adc_read_temp(bat->da9052);371 if (adc_temp < 0)372 return adc_temp;373 374 i = da9052_determine_vc_tbl_index(adc_temp);375 376 if (bat_voltage >= vc_tbl[i][0][0]) {377 *capacity = 100;378 return 0;379 }380 if (bat_voltage <= vc_tbl[i][DA9052_VC_TBL_SZ - 1][0]) {381 *capacity = 0;382 return 0;383 }384 flag = 0;385 386 for (j = 0; j < (DA9052_VC_TBL_SZ-1); j++) {387 if ((bat_voltage <= vc_tbl[i][j][0]) &&388 (bat_voltage >= vc_tbl[i][j + 1][0])) {389 vbat_upper = vc_tbl[i][j][0];390 vbat_lower = vc_tbl[i][j + 1][0];391 level_upper = vc_tbl[i][j][1];392 level_lower = vc_tbl[i][j + 1][1];393 flag = 1;394 break;395 }396 }397 if (!flag)398 return -EIO;399 400 *capacity = da9052_bat_interpolate(vbat_lower, vbat_upper, level_lower,401 level_upper, bat_voltage);402 403 return 0;404}405 406static int da9052_bat_check_health(struct da9052_battery *bat, int *health)407{408 int ret;409 int bat_illegal;410 int capacity;411 412 ret = da9052_bat_check_presence(bat, &bat_illegal);413 if (ret < 0)414 return ret;415 416 if (bat_illegal) {417 bat->health = POWER_SUPPLY_HEALTH_UNKNOWN;418 return 0;419 }420 421 if (bat->health != POWER_SUPPLY_HEALTH_OVERHEAT) {422 ret = da9052_bat_read_capacity(bat, &capacity);423 if (ret < 0)424 return ret;425 if (capacity < DA9052_BAT_LOW_CAP)426 bat->health = POWER_SUPPLY_HEALTH_DEAD;427 else428 bat->health = POWER_SUPPLY_HEALTH_GOOD;429 }430 431 *health = bat->health;432 433 return 0;434}435 436static irqreturn_t da9052_bat_irq(int irq, void *data)437{438 struct da9052_battery *bat = data;439 int virq;440 441 virq = regmap_irq_get_virq(bat->da9052->irq_data, irq);442 irq -= virq;443 444 if (irq == DA9052_IRQ_CHGEND)445 bat->status = POWER_SUPPLY_STATUS_FULL;446 else447 da9052_bat_check_status(bat, NULL);448 449 if (irq == DA9052_IRQ_CHGEND || irq == DA9052_IRQ_DCIN ||450 irq == DA9052_IRQ_VBUS || irq == DA9052_IRQ_TBAT) {451 power_supply_changed(bat->psy);452 }453 454 return IRQ_HANDLED;455}456 457static int da9052_USB_current_notifier(struct notifier_block *nb,458 unsigned long events, void *data)459{460 u8 row;461 u8 col;462 int *current_mA = data;463 int ret;464 struct da9052_battery *bat = container_of(nb, struct da9052_battery,465 nb);466 467 if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING)468 return -EPERM;469 470 ret = da9052_reg_read(bat->da9052, DA9052_CHGBUCK_REG);471 if (ret & DA9052_CHG_USB_ILIM_MASK)472 return -EPERM;473 474 if (bat->da9052->chip_id == DA9052)475 row = 0;476 else477 row = 1;478 479 if (*current_mA < da9052_chg_current_lim[row][0] ||480 *current_mA > da9052_chg_current_lim[row][DA9052_CHG_LIM_COLS - 1])481 return -EINVAL;482 483 for (col = 0; col <= DA9052_CHG_LIM_COLS - 1 ; col++) {484 if (*current_mA <= da9052_chg_current_lim[row][col])485 break;486 }487 488 return da9052_reg_update(bat->da9052, DA9052_ISET_REG,489 DA9052_ISET_USB_MASK, col);490}491 492static int da9052_bat_get_property(struct power_supply *psy,493 enum power_supply_property psp,494 union power_supply_propval *val)495{496 int ret;497 int illegal;498 struct da9052_battery *bat = power_supply_get_drvdata(psy);499 500 ret = da9052_bat_check_presence(bat, &illegal);501 if (ret < 0)502 return ret;503 504 if (illegal && psp != POWER_SUPPLY_PROP_PRESENT)505 return -ENODEV;506 507 switch (psp) {508 case POWER_SUPPLY_PROP_STATUS:509 ret = da9052_bat_check_status(bat, &val->intval);510 break;511 case POWER_SUPPLY_PROP_ONLINE:512 val->intval =513 (bat->charger_type == DA9052_NOCHARGER) ? 0 : 1;514 break;515 case POWER_SUPPLY_PROP_PRESENT:516 ret = da9052_bat_check_presence(bat, &val->intval);517 break;518 case POWER_SUPPLY_PROP_HEALTH:519 ret = da9052_bat_check_health(bat, &val->intval);520 break;521 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:522 val->intval = DA9052_BAT_CUTOFF_VOLT * 1000;523 break;524 case POWER_SUPPLY_PROP_VOLTAGE_AVG:525 ret = da9052_bat_read_volt(bat, &val->intval);526 break;527 case POWER_SUPPLY_PROP_CURRENT_AVG:528 ret = da9052_read_chg_current(bat, &val->intval);529 break;530 case POWER_SUPPLY_PROP_CAPACITY:531 ret = da9052_bat_read_capacity(bat, &val->intval);532 break;533 case POWER_SUPPLY_PROP_TEMP:534 val->intval = da9052_adc_read_temp(bat->da9052);535 ret = val->intval;536 break;537 case POWER_SUPPLY_PROP_TECHNOLOGY:538 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;539 break;540 default:541 return -EINVAL;542 }543 return ret;544}545 546static enum power_supply_property da9052_bat_props[] = {547 POWER_SUPPLY_PROP_STATUS,548 POWER_SUPPLY_PROP_ONLINE,549 POWER_SUPPLY_PROP_PRESENT,550 POWER_SUPPLY_PROP_HEALTH,551 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,552 POWER_SUPPLY_PROP_VOLTAGE_AVG,553 POWER_SUPPLY_PROP_CURRENT_AVG,554 POWER_SUPPLY_PROP_CAPACITY,555 POWER_SUPPLY_PROP_TEMP,556 POWER_SUPPLY_PROP_TECHNOLOGY,557};558 559static struct power_supply_desc psy_desc = {560 .name = "da9052-bat",561 .type = POWER_SUPPLY_TYPE_BATTERY,562 .properties = da9052_bat_props,563 .num_properties = ARRAY_SIZE(da9052_bat_props),564 .get_property = da9052_bat_get_property,565};566 567static char *da9052_bat_irqs[] = {568 "BATT TEMP",569 "DCIN DET",570 "DCIN REM",571 "VBUS DET",572 "VBUS REM",573 "CHG END",574};575 576static int da9052_bat_irq_bits[] = {577 DA9052_IRQ_TBAT,578 DA9052_IRQ_DCIN,579 DA9052_IRQ_DCINREM,580 DA9052_IRQ_VBUS,581 DA9052_IRQ_VBUSREM,582 DA9052_IRQ_CHGEND,583};584 585static s32 da9052_bat_probe(struct platform_device *pdev)586{587 struct da9052_pdata *pdata;588 struct da9052_battery *bat;589 struct power_supply_config psy_cfg = {};590 int ret;591 int i;592 593 bat = devm_kzalloc(&pdev->dev, sizeof(struct da9052_battery),594 GFP_KERNEL);595 if (!bat)596 return -ENOMEM;597 598 psy_cfg.drv_data = bat;599 600 bat->da9052 = dev_get_drvdata(pdev->dev.parent);601 bat->charger_type = DA9052_NOCHARGER;602 bat->status = POWER_SUPPLY_STATUS_UNKNOWN;603 bat->health = POWER_SUPPLY_HEALTH_UNKNOWN;604 bat->nb.notifier_call = da9052_USB_current_notifier;605 606 pdata = bat->da9052->dev->platform_data;607 if (pdata != NULL && pdata->use_for_apm)608 psy_desc.use_for_apm = pdata->use_for_apm;609 else610 psy_desc.use_for_apm = 1;611 612 for (i = 0; i < ARRAY_SIZE(da9052_bat_irqs); i++) {613 ret = da9052_request_irq(bat->da9052,614 da9052_bat_irq_bits[i], da9052_bat_irqs[i],615 da9052_bat_irq, bat);616 617 if (ret != 0) {618 dev_err(bat->da9052->dev,619 "DA9052 failed to request %s IRQ: %d\n",620 da9052_bat_irqs[i], ret);621 goto err;622 }623 }624 625 bat->psy = devm_power_supply_register(&pdev->dev, &psy_desc, &psy_cfg);626 if (IS_ERR(bat->psy)) {627 ret = PTR_ERR(bat->psy);628 goto err;629 }630 631 platform_set_drvdata(pdev, bat);632 return 0;633 634err:635 while (--i >= 0)636 da9052_free_irq(bat->da9052, da9052_bat_irq_bits[i], bat);637 638 return ret;639}640static void da9052_bat_remove(struct platform_device *pdev)641{642 int i;643 struct da9052_battery *bat = platform_get_drvdata(pdev);644 645 for (i = 0; i < ARRAY_SIZE(da9052_bat_irqs); i++)646 da9052_free_irq(bat->da9052, da9052_bat_irq_bits[i], bat);647}648 649static struct platform_driver da9052_bat_driver = {650 .probe = da9052_bat_probe,651 .remove_new = da9052_bat_remove,652 .driver = {653 .name = "da9052-bat",654 },655};656module_platform_driver(da9052_bat_driver);657 658MODULE_DESCRIPTION("DA9052 BAT Device Driver");659MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");660MODULE_LICENSE("GPL");661MODULE_ALIAS("platform:da9052-bat");662