| /* |
| * Batttery Driver for Dialog DA9052 PMICs |
| * |
| * Copyright(c) 2011 Dialog Semiconductor Ltd. |
| * |
| * Author: David Dajun Chen <dchen@diasemi.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| */ |
| |
| #include <linux/delay.h> |
| #include <linux/freezer.h> |
| #include <linux/fs.h> |
| #include <linux/jiffies.h> |
| #include <linux/module.h> |
| #include <linux/timer.h> |
| #include <linux/uaccess.h> |
| #include <linux/platform_device.h> |
| #include <linux/power_supply.h> |
| |
| #include <linux/mfd/da9052/da9052.h> |
| #include <linux/mfd/da9052/pdata.h> |
| #include <linux/mfd/da9052/reg.h> |
| |
| /* STATIC CONFIGURATION */ |
| #define DA9052_BAT_CUTOFF_VOLT 2800 |
| #define DA9052_BAT_TSH 62000 |
| #define DA9052_BAT_LOW_CAP 4 |
| #define DA9052_AVG_SZ 4 |
| #define DA9052_VC_TBL_SZ 68 |
| #define DA9052_VC_TBL_REF_SZ 3 |
| |
| #define DA9052_ISET_USB_MASK 0x0F |
| #define DA9052_CHG_USB_ILIM_MASK 0x40 |
| #define DA9052_CHG_LIM_COLS 16 |
| |
| #define DA9052_MEAN(x, y) ((x + y) / 2) |
| |
| enum charger_type_enum { |
| DA9052_NOCHARGER = 1, |
| DA9052_CHARGER, |
| }; |
| |
| static const u16 da9052_chg_current_lim[2][DA9052_CHG_LIM_COLS] = { |
| {70, 80, 90, 100, 110, 120, 400, 450, |
| 500, 550, 600, 650, 700, 900, 1100, 1300}, |
| {80, 90, 100, 110, 120, 400, 450, 500, |
| 550, 600, 800, 1000, 1200, 1400, 1600, 1800}, |
| }; |
| |
| static const u16 vc_tbl_ref[3] = {10, 25, 40}; |
| /* Lookup table for voltage vs capacity */ |
| static u32 const vc_tbl[3][68][2] = { |
| /* For temperature 10 degree Celsius */ |
| { |
| {4082, 100}, {4036, 98}, |
| {4020, 96}, {4008, 95}, |
| {3997, 93}, {3983, 91}, |
| {3964, 90}, {3943, 88}, |
| {3926, 87}, {3912, 85}, |
| {3900, 84}, {3890, 82}, |
| {3881, 80}, {3873, 79}, |
| {3865, 77}, {3857, 76}, |
| {3848, 74}, {3839, 73}, |
| {3829, 71}, {3820, 70}, |
| {3811, 68}, {3802, 67}, |
| {3794, 65}, {3785, 64}, |
| {3778, 62}, {3770, 61}, |
| {3763, 59}, {3756, 58}, |
| {3750, 56}, {3744, 55}, |
| {3738, 53}, {3732, 52}, |
| {3727, 50}, {3722, 49}, |
| {3717, 47}, {3712, 46}, |
| {3708, 44}, {3703, 43}, |
| {3700, 41}, {3696, 40}, |
| {3693, 38}, {3691, 37}, |
| {3688, 35}, {3686, 34}, |
| {3683, 32}, {3681, 31}, |
| {3678, 29}, {3675, 28}, |
| {3672, 26}, {3669, 25}, |
| {3665, 23}, {3661, 22}, |
| {3656, 21}, {3651, 19}, |
| {3645, 18}, {3639, 16}, |
| {3631, 15}, {3622, 13}, |
| {3611, 12}, {3600, 10}, |
| {3587, 9}, {3572, 7}, |
| {3548, 6}, {3503, 5}, |
| {3420, 3}, {3268, 2}, |
| {2992, 1}, {2746, 0} |
| }, |
| /* For temperature 25 degree Celsius */ |
| { |
| {4102, 100}, {4065, 98}, |
| {4048, 96}, {4034, 95}, |
| {4021, 93}, {4011, 92}, |
| {4001, 90}, {3986, 88}, |
| {3968, 87}, {3952, 85}, |
| {3938, 84}, {3926, 82}, |
| {3916, 81}, {3908, 79}, |
| {3900, 77}, {3892, 76}, |
| {3883, 74}, {3874, 73}, |
| {3864, 71}, {3855, 70}, |
| {3846, 68}, {3836, 67}, |
| {3827, 65}, {3819, 64}, |
| {3810, 62}, {3801, 61}, |
| {3793, 59}, {3786, 58}, |
| {3778, 56}, {3772, 55}, |
| {3765, 53}, {3759, 52}, |
| {3754, 50}, {3748, 49}, |
| {3743, 47}, {3738, 46}, |
| {3733, 44}, {3728, 43}, |
| {3724, 41}, {3720, 40}, |
| {3716, 38}, {3712, 37}, |
| {3709, 35}, {3706, 34}, |
| {3703, 33}, {3701, 31}, |
| {3698, 30}, {3696, 28}, |
| {3693, 27}, {3690, 25}, |
| {3687, 24}, {3683, 22}, |
| {3680, 21}, {3675, 19}, |
| {3671, 18}, {3666, 17}, |
| {3660, 15}, {3654, 14}, |
| {3647, 12}, {3639, 11}, |
| {3630, 9}, {3621, 8}, |
| {3613, 6}, {3606, 5}, |
| {3597, 4}, {3582, 2}, |
| {3546, 1}, {2747, 0} |
| }, |
| /* For temperature 40 degree Celsius */ |
| { |
| {4114, 100}, {4081, 98}, |
| {4065, 96}, {4050, 95}, |
| {4036, 93}, {4024, 92}, |
| {4013, 90}, {4002, 88}, |
| {3990, 87}, {3976, 85}, |
| {3962, 84}, {3950, 82}, |
| {3939, 81}, {3930, 79}, |
| {3921, 77}, {3912, 76}, |
| {3902, 74}, {3893, 73}, |
| {3883, 71}, {3874, 70}, |
| {3865, 68}, {3856, 67}, |
| {3847, 65}, {3838, 64}, |
| {3829, 62}, {3820, 61}, |
| {3812, 59}, {3803, 58}, |
| {3795, 56}, {3787, 55}, |
| {3780, 53}, {3773, 52}, |
| {3767, 50}, {3761, 49}, |
| {3756, 47}, {3751, 46}, |
| {3746, 44}, {3741, 43}, |
| {3736, 41}, {3732, 40}, |
| {3728, 38}, {3724, 37}, |
| {3720, 35}, {3716, 34}, |
| {3713, 33}, {3710, 31}, |
| {3707, 30}, {3704, 28}, |
| {3701, 27}, {3698, 25}, |
| {3695, 24}, {3691, 22}, |
| {3686, 21}, {3681, 19}, |
| {3676, 18}, {3671, 17}, |
| {3666, 15}, {3661, 14}, |
| {3655, 12}, {3648, 11}, |
| {3640, 9}, {3632, 8}, |
| {3622, 6}, {3616, 5}, |
| {3611, 4}, {3604, 2}, |
| {3594, 1}, {2747, 0} |
| } |
| }; |
| |
| struct da9052_battery { |
| struct da9052 *da9052; |
| struct power_supply psy; |
| struct notifier_block nb; |
| int charger_type; |
| int status; |
| int health; |
| }; |
| |
| static inline int volt_reg_to_mV(int value) |
| { |
| return ((value * 1000) / 512) + 2500; |
| } |
| |
| static inline int ichg_reg_to_mA(int value) |
| { |
| return (value * 3900) / 1000; |
| } |
| |
| static int da9052_read_chgend_current(struct da9052_battery *bat, |
| int *current_mA) |
| { |
| int ret; |
| |
| if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) |
| return -EINVAL; |
| |
| ret = da9052_reg_read(bat->da9052, DA9052_ICHG_END_REG); |
| if (ret < 0) |
| return ret; |
| |
| *current_mA = ichg_reg_to_mA(ret & DA9052_ICHGEND_ICHGEND); |
| |
| return 0; |
| } |
| |
| static int da9052_read_chg_current(struct da9052_battery *bat, int *current_mA) |
| { |
| int ret; |
| |
| if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) |
| return -EINVAL; |
| |
| ret = da9052_reg_read(bat->da9052, DA9052_ICHG_AV_REG); |
| if (ret < 0) |
| return ret; |
| |
| *current_mA = ichg_reg_to_mA(ret & DA9052_ICHGAV_ICHGAV); |
| |
| return 0; |
| } |
| |
| static int da9052_bat_check_status(struct da9052_battery *bat, int *status) |
| { |
| u8 v[2] = {0, 0}; |
| u8 bat_status; |
| u8 chg_end; |
| int ret; |
| int chg_current; |
| int chg_end_current; |
| bool dcinsel; |
| bool dcindet; |
| bool vbussel; |
| bool vbusdet; |
| bool dc; |
| bool vbus; |
| |
| ret = da9052_group_read(bat->da9052, DA9052_STATUS_A_REG, 2, v); |
| if (ret < 0) |
| return ret; |
| |
| bat_status = v[0]; |
| chg_end = v[1]; |
| |
| dcinsel = bat_status & DA9052_STATUSA_DCINSEL; |
| dcindet = bat_status & DA9052_STATUSA_DCINDET; |
| vbussel = bat_status & DA9052_STATUSA_VBUSSEL; |
| vbusdet = bat_status & DA9052_STATUSA_VBUSDET; |
| dc = dcinsel && dcindet; |
| vbus = vbussel && vbusdet; |
| |
| /* Preference to WALL(DCIN) charger unit */ |
| if (dc || vbus) { |
| bat->charger_type = DA9052_CHARGER; |
| |
| /* If charging end flag is set and Charging current is greater |
| * than charging end limit then battery is charging |
| */ |
| if ((chg_end & DA9052_STATUSB_CHGEND) != 0) { |
| ret = da9052_read_chg_current(bat, &chg_current); |
| if (ret < 0) |
| return ret; |
| ret = da9052_read_chgend_current(bat, &chg_end_current); |
| if (ret < 0) |
| return ret; |
| |
| if (chg_current >= chg_end_current) |
| bat->status = POWER_SUPPLY_STATUS_CHARGING; |
| else |
| bat->status = POWER_SUPPLY_STATUS_NOT_CHARGING; |
| } else { |
| /* If Charging end flag is cleared then battery is |
| * charging |
| */ |
| bat->status = POWER_SUPPLY_STATUS_CHARGING; |
| } |
| } else if (dcindet || vbusdet) { |
| bat->charger_type = DA9052_CHARGER; |
| bat->status = POWER_SUPPLY_STATUS_NOT_CHARGING; |
| } else { |
| bat->charger_type = DA9052_NOCHARGER; |
| bat->status = POWER_SUPPLY_STATUS_DISCHARGING; |
| } |
| |
| if (status != NULL) |
| *status = bat->status; |
| return 0; |
| } |
| |
| static int da9052_bat_read_volt(struct da9052_battery *bat, int *volt_mV) |
| { |
| int volt; |
| |
| volt = da9052_adc_manual_read(bat->da9052, DA9052_ADC_MAN_MUXSEL_VBAT); |
| if (volt < 0) |
| return volt; |
| |
| *volt_mV = volt_reg_to_mV(volt); |
| |
| return 0; |
| } |
| |
| static int da9052_bat_check_presence(struct da9052_battery *bat, int *illegal) |
| { |
| int bat_temp; |
| |
| bat_temp = da9052_adc_read_temp(bat->da9052); |
| if (bat_temp < 0) |
| return bat_temp; |
| |
| if (bat_temp > DA9052_BAT_TSH) |
| *illegal = 1; |
| else |
| *illegal = 0; |
| |
| return 0; |
| } |
| |
| static int da9052_bat_interpolate(int vbat_lower, int vbat_upper, |
| int level_lower, int level_upper, |
| int bat_voltage) |
| { |
| int tmp; |
| |
| tmp = ((level_upper - level_lower) * 1000) / (vbat_upper - vbat_lower); |
| tmp = level_lower + (((bat_voltage - vbat_lower) * tmp) / 1000); |
| |
| return tmp; |
| } |
| |
| unsigned char da9052_determine_vc_tbl_index(unsigned char adc_temp) |
| { |
| int i; |
| |
| if (adc_temp <= vc_tbl_ref[0]) |
| return 0; |
| |
| if (adc_temp > vc_tbl_ref[DA9052_VC_TBL_REF_SZ - 1]) |
| return DA9052_VC_TBL_REF_SZ - 1; |
| |
| for (i = 0; i < DA9052_VC_TBL_REF_SZ; i++) { |
| if ((adc_temp > vc_tbl_ref[i]) && |
| (adc_temp <= DA9052_MEAN(vc_tbl_ref[i], vc_tbl_ref[i + 1]))) |
| return i; |
| if ((adc_temp > DA9052_MEAN(vc_tbl_ref[i], vc_tbl_ref[i + 1])) |
| && (adc_temp <= vc_tbl_ref[i])) |
| return i + 1; |
| } |
| } |
| |
| static int da9052_bat_read_capacity(struct da9052_battery *bat, int *capacity) |
| { |
| int adc_temp; |
| int bat_voltage; |
| int vbat_lower; |
| int vbat_upper; |
| int level_upper; |
| int level_lower; |
| int ret; |
| int flag; |
| int i = 0; |
| int j; |
| |
| ret = da9052_bat_read_volt(bat, &bat_voltage); |
| if (ret < 0) |
| return ret; |
| |
| adc_temp = da9052_adc_read_temp(bat->da9052); |
| if (adc_temp < 0) |
| return adc_temp; |
| |
| i = da9052_determine_vc_tbl_index(adc_temp); |
| |
| if (bat_voltage >= vc_tbl[i][0][0]) { |
| *capacity = 100; |
| return 0; |
| } |
| if (bat_voltage <= vc_tbl[i][DA9052_VC_TBL_SZ - 1][0]) { |
| *capacity = 0; |
| return 0; |
| } |
| flag = 0; |
| |
| for (j = 0; j < (DA9052_VC_TBL_SZ-1); j++) { |
| if ((bat_voltage <= vc_tbl[i][j][0]) && |
| (bat_voltage >= vc_tbl[i][j + 1][0])) { |
| vbat_upper = vc_tbl[i][j][0]; |
| vbat_lower = vc_tbl[i][j + 1][0]; |
| level_upper = vc_tbl[i][j][1]; |
| level_lower = vc_tbl[i][j + 1][1]; |
| flag = 1; |
| break; |
| } |
| } |
| if (!flag) |
| return -EIO; |
| |
| *capacity = da9052_bat_interpolate(vbat_lower, vbat_upper, level_lower, |
| level_upper, bat_voltage); |
| |
| return 0; |
| } |
| |
| static int da9052_bat_check_health(struct da9052_battery *bat, int *health) |
| { |
| int ret; |
| int bat_illegal; |
| int capacity; |
| |
| ret = da9052_bat_check_presence(bat, &bat_illegal); |
| if (ret < 0) |
| return ret; |
| |
| if (bat_illegal) { |
| bat->health = POWER_SUPPLY_HEALTH_UNKNOWN; |
| return 0; |
| } |
| |
| if (bat->health != POWER_SUPPLY_HEALTH_OVERHEAT) { |
| ret = da9052_bat_read_capacity(bat, &capacity); |
| if (ret < 0) |
| return ret; |
| if (capacity < DA9052_BAT_LOW_CAP) |
| bat->health = POWER_SUPPLY_HEALTH_DEAD; |
| else |
| bat->health = POWER_SUPPLY_HEALTH_GOOD; |
| } |
| |
| *health = bat->health; |
| |
| return 0; |
| } |
| |
| static irqreturn_t da9052_bat_irq(int irq, void *data) |
| { |
| struct da9052_battery *bat = data; |
| |
| irq -= bat->da9052->irq_base; |
| |
| if (irq == DA9052_IRQ_CHGEND) |
| bat->status = POWER_SUPPLY_STATUS_FULL; |
| else |
| da9052_bat_check_status(bat, NULL); |
| |
| if (irq == DA9052_IRQ_CHGEND || irq == DA9052_IRQ_DCIN || |
| irq == DA9052_IRQ_VBUS || irq == DA9052_IRQ_TBAT) { |
| power_supply_changed(&bat->psy); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int da9052_USB_current_notifier(struct notifier_block *nb, |
| unsigned long events, void *data) |
| { |
| u8 row; |
| u8 col; |
| int *current_mA = data; |
| int ret; |
| struct da9052_battery *bat = container_of(nb, struct da9052_battery, |
| nb); |
| |
| if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) |
| return -EPERM; |
| |
| ret = da9052_reg_read(bat->da9052, DA9052_CHGBUCK_REG); |
| if (ret & DA9052_CHG_USB_ILIM_MASK) |
| return -EPERM; |
| |
| if (bat->da9052->chip_id == DA9052) |
| row = 0; |
| else |
| row = 1; |
| |
| if (*current_mA < da9052_chg_current_lim[row][0] || |
| *current_mA > da9052_chg_current_lim[row][DA9052_CHG_LIM_COLS - 1]) |
| return -EINVAL; |
| |
| for (col = 0; col <= DA9052_CHG_LIM_COLS - 1 ; col++) { |
| if (*current_mA <= da9052_chg_current_lim[row][col]) |
| break; |
| } |
| |
| return da9052_reg_update(bat->da9052, DA9052_ISET_REG, |
| DA9052_ISET_USB_MASK, col); |
| } |
| |
| static int da9052_bat_get_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| union power_supply_propval *val) |
| { |
| int ret; |
| int illegal; |
| struct da9052_battery *bat = container_of(psy, struct da9052_battery, |
| psy); |
| |
| ret = da9052_bat_check_presence(bat, &illegal); |
| if (ret < 0) |
| return ret; |
| |
| if (illegal && psp != POWER_SUPPLY_PROP_PRESENT) |
| return -ENODEV; |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_STATUS: |
| ret = da9052_bat_check_status(bat, &val->intval); |
| break; |
| case POWER_SUPPLY_PROP_ONLINE: |
| val->intval = |
| (bat->charger_type == DA9052_NOCHARGER) ? 0 : 1; |
| break; |
| case POWER_SUPPLY_PROP_PRESENT: |
| ret = da9052_bat_check_presence(bat, &val->intval); |
| break; |
| case POWER_SUPPLY_PROP_HEALTH: |
| ret = da9052_bat_check_health(bat, &val->intval); |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
| val->intval = DA9052_BAT_CUTOFF_VOLT * 1000; |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_AVG: |
| ret = da9052_bat_read_volt(bat, &val->intval); |
| break; |
| case POWER_SUPPLY_PROP_CURRENT_AVG: |
| ret = da9052_read_chg_current(bat, &val->intval); |
| break; |
| case POWER_SUPPLY_PROP_CAPACITY: |
| ret = da9052_bat_read_capacity(bat, &val->intval); |
| break; |
| case POWER_SUPPLY_PROP_TEMP: |
| val->intval = da9052_adc_read_temp(bat->da9052); |
| ret = val->intval; |
| break; |
| case POWER_SUPPLY_PROP_TECHNOLOGY: |
| val->intval = POWER_SUPPLY_TECHNOLOGY_LION; |
| break; |
| default: |
| return -EINVAL; |
| } |
| return ret; |
| } |
| |
| static enum power_supply_property da9052_bat_props[] = { |
| POWER_SUPPLY_PROP_STATUS, |
| POWER_SUPPLY_PROP_ONLINE, |
| POWER_SUPPLY_PROP_PRESENT, |
| POWER_SUPPLY_PROP_HEALTH, |
| POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
| POWER_SUPPLY_PROP_VOLTAGE_AVG, |
| POWER_SUPPLY_PROP_CURRENT_AVG, |
| POWER_SUPPLY_PROP_CAPACITY, |
| POWER_SUPPLY_PROP_TEMP, |
| POWER_SUPPLY_PROP_TECHNOLOGY, |
| }; |
| |
| static struct power_supply template_battery = { |
| .name = "da9052-bat", |
| .type = POWER_SUPPLY_TYPE_BATTERY, |
| .properties = da9052_bat_props, |
| .num_properties = ARRAY_SIZE(da9052_bat_props), |
| .get_property = da9052_bat_get_property, |
| }; |
| |
| static const char *const da9052_bat_irqs[] = { |
| "BATT TEMP", |
| "DCIN DET", |
| "DCIN REM", |
| "VBUS DET", |
| "VBUS REM", |
| "CHG END", |
| }; |
| |
| static s32 __devinit da9052_bat_probe(struct platform_device *pdev) |
| { |
| struct da9052_pdata *pdata; |
| struct da9052_battery *bat; |
| int ret; |
| int irq; |
| int i; |
| |
| bat = kzalloc(sizeof(struct da9052_battery), GFP_KERNEL); |
| if (!bat) |
| return -ENOMEM; |
| |
| bat->da9052 = dev_get_drvdata(pdev->dev.parent); |
| bat->psy = template_battery; |
| bat->charger_type = DA9052_NOCHARGER; |
| bat->status = POWER_SUPPLY_STATUS_UNKNOWN; |
| bat->health = POWER_SUPPLY_HEALTH_UNKNOWN; |
| bat->nb.notifier_call = da9052_USB_current_notifier; |
| |
| pdata = bat->da9052->dev->platform_data; |
| if (pdata != NULL && pdata->use_for_apm) |
| bat->psy.use_for_apm = pdata->use_for_apm; |
| else |
| bat->psy.use_for_apm = 1; |
| |
| for (i = 0; i < ARRAY_SIZE(da9052_bat_irqs); i++) { |
| irq = platform_get_irq_byname(pdev, da9052_bat_irqs[i]); |
| ret = request_threaded_irq(bat->da9052->irq_base + irq, |
| NULL, da9052_bat_irq, |
| IRQF_TRIGGER_LOW | IRQF_ONESHOT, |
| da9052_bat_irqs[i], bat); |
| if (ret != 0) { |
| dev_err(bat->da9052->dev, |
| "DA9052 failed to request %s IRQ %d: %d\n", |
| da9052_bat_irqs[i], irq, ret); |
| goto err; |
| } |
| } |
| |
| ret = power_supply_register(&pdev->dev, &bat->psy); |
| if (ret) |
| goto err; |
| |
| platform_set_drvdata(pdev, bat); |
| return 0; |
| |
| err: |
| for (; i >= 0; i--) { |
| irq = platform_get_irq_byname(pdev, da9052_bat_irqs[i]); |
| free_irq(bat->da9052->irq_base + irq, bat); |
| } |
| kfree(bat); |
| return ret; |
| } |
| static int __devexit da9052_bat_remove(struct platform_device *pdev) |
| { |
| int i; |
| int irq; |
| struct da9052_battery *bat = platform_get_drvdata(pdev); |
| |
| for (i = 0; i < ARRAY_SIZE(da9052_bat_irqs); i++) { |
| irq = platform_get_irq_byname(pdev, da9052_bat_irqs[i]); |
| free_irq(bat->da9052->irq_base + irq, bat); |
| } |
| power_supply_unregister(&bat->psy); |
| kfree(bat); |
| |
| return 0; |
| } |
| |
| static struct platform_driver da9052_bat_driver = { |
| .probe = da9052_bat_probe, |
| .remove = __devexit_p(da9052_bat_remove), |
| .driver = { |
| .name = "da9052-bat", |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| static int __init da9052_bat_init(void) |
| { |
| return platform_driver_register(&da9052_bat_driver); |
| } |
| module_init(da9052_bat_init); |
| |
| static void __exit da9052_bat_exit(void) |
| { |
| platform_driver_unregister(&da9052_bat_driver); |
| } |
| module_exit(da9052_bat_exit); |
| |
| MODULE_DESCRIPTION("DA9052 BAT Device Driver"); |
| MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("platform:da9052-bat"); |