669 lines
15 KiB
C
669 lines
15 KiB
C
/*
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* Batttery Driver for Dialog DA9052 PMICs
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*
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* Copyright(c) 2011 Dialog Semiconductor Ltd.
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*
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* Author: David Dajun Chen <dchen@diasemi.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/delay.h>
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#include <linux/freezer.h>
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#include <linux/fs.h>
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#include <linux/jiffies.h>
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#include <linux/module.h>
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#include <linux/timer.h>
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#include <linux/uaccess.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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#include <linux/mfd/da9052/da9052.h>
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#include <linux/mfd/da9052/pdata.h>
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#include <linux/mfd/da9052/reg.h>
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/* STATIC CONFIGURATION */
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#define DA9052_BAT_CUTOFF_VOLT 2800
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#define DA9052_BAT_TSH 62000
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#define DA9052_BAT_LOW_CAP 4
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#define DA9052_AVG_SZ 4
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#define DA9052_VC_TBL_SZ 68
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#define DA9052_VC_TBL_REF_SZ 3
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#define DA9052_ISET_USB_MASK 0x0F
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#define DA9052_CHG_USB_ILIM_MASK 0x40
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#define DA9052_CHG_LIM_COLS 16
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#define DA9052_MEAN(x, y) ((x + y) / 2)
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enum charger_type_enum {
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DA9052_NOCHARGER = 1,
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DA9052_CHARGER,
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};
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static const u16 da9052_chg_current_lim[2][DA9052_CHG_LIM_COLS] = {
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{70, 80, 90, 100, 110, 120, 400, 450,
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500, 550, 600, 650, 700, 900, 1100, 1300},
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{80, 90, 100, 110, 120, 400, 450, 500,
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550, 600, 800, 1000, 1200, 1400, 1600, 1800},
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};
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static const u16 vc_tbl_ref[3] = {10, 25, 40};
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/* Lookup table for voltage vs capacity */
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static u32 const vc_tbl[3][68][2] = {
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/* For temperature 10 degree Celsius */
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{
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{4082, 100}, {4036, 98},
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{4020, 96}, {4008, 95},
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{3997, 93}, {3983, 91},
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{3964, 90}, {3943, 88},
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{3926, 87}, {3912, 85},
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{3900, 84}, {3890, 82},
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{3881, 80}, {3873, 79},
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{3865, 77}, {3857, 76},
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{3848, 74}, {3839, 73},
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{3829, 71}, {3820, 70},
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{3811, 68}, {3802, 67},
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{3794, 65}, {3785, 64},
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{3778, 62}, {3770, 61},
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{3763, 59}, {3756, 58},
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{3750, 56}, {3744, 55},
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{3738, 53}, {3732, 52},
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{3727, 50}, {3722, 49},
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{3717, 47}, {3712, 46},
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{3708, 44}, {3703, 43},
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{3700, 41}, {3696, 40},
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{3693, 38}, {3691, 37},
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{3688, 35}, {3686, 34},
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{3683, 32}, {3681, 31},
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{3678, 29}, {3675, 28},
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{3672, 26}, {3669, 25},
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{3665, 23}, {3661, 22},
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{3656, 21}, {3651, 19},
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{3645, 18}, {3639, 16},
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{3631, 15}, {3622, 13},
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{3611, 12}, {3600, 10},
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{3587, 9}, {3572, 7},
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{3548, 6}, {3503, 5},
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{3420, 3}, {3268, 2},
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{2992, 1}, {2746, 0}
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},
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/* For temperature 25 degree Celsius */
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{
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{4102, 100}, {4065, 98},
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{4048, 96}, {4034, 95},
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{4021, 93}, {4011, 92},
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{4001, 90}, {3986, 88},
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{3968, 87}, {3952, 85},
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{3938, 84}, {3926, 82},
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{3916, 81}, {3908, 79},
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{3900, 77}, {3892, 76},
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{3883, 74}, {3874, 73},
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{3864, 71}, {3855, 70},
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{3846, 68}, {3836, 67},
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{3827, 65}, {3819, 64},
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{3810, 62}, {3801, 61},
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{3793, 59}, {3786, 58},
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{3778, 56}, {3772, 55},
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{3765, 53}, {3759, 52},
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{3754, 50}, {3748, 49},
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{3743, 47}, {3738, 46},
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{3733, 44}, {3728, 43},
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{3724, 41}, {3720, 40},
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{3716, 38}, {3712, 37},
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{3709, 35}, {3706, 34},
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{3703, 33}, {3701, 31},
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{3698, 30}, {3696, 28},
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{3693, 27}, {3690, 25},
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{3687, 24}, {3683, 22},
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{3680, 21}, {3675, 19},
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{3671, 18}, {3666, 17},
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{3660, 15}, {3654, 14},
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{3647, 12}, {3639, 11},
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{3630, 9}, {3621, 8},
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{3613, 6}, {3606, 5},
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{3597, 4}, {3582, 2},
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{3546, 1}, {2747, 0}
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},
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/* For temperature 40 degree Celsius */
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{
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{4114, 100}, {4081, 98},
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{4065, 96}, {4050, 95},
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{4036, 93}, {4024, 92},
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{4013, 90}, {4002, 88},
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{3990, 87}, {3976, 85},
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{3962, 84}, {3950, 82},
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{3939, 81}, {3930, 79},
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{3921, 77}, {3912, 76},
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{3902, 74}, {3893, 73},
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{3883, 71}, {3874, 70},
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{3865, 68}, {3856, 67},
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{3847, 65}, {3838, 64},
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{3829, 62}, {3820, 61},
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{3812, 59}, {3803, 58},
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{3795, 56}, {3787, 55},
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{3780, 53}, {3773, 52},
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{3767, 50}, {3761, 49},
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{3756, 47}, {3751, 46},
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{3746, 44}, {3741, 43},
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{3736, 41}, {3732, 40},
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{3728, 38}, {3724, 37},
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{3720, 35}, {3716, 34},
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{3713, 33}, {3710, 31},
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{3707, 30}, {3704, 28},
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{3701, 27}, {3698, 25},
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{3695, 24}, {3691, 22},
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{3686, 21}, {3681, 19},
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{3676, 18}, {3671, 17},
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{3666, 15}, {3661, 14},
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{3655, 12}, {3648, 11},
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{3640, 9}, {3632, 8},
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{3622, 6}, {3616, 5},
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{3611, 4}, {3604, 2},
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{3594, 1}, {2747, 0}
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}
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};
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struct da9052_battery {
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struct da9052 *da9052;
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struct power_supply psy;
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struct notifier_block nb;
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int charger_type;
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int status;
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int health;
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};
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static inline int volt_reg_to_mV(int value)
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{
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return ((value * 1000) / 512) + 2500;
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}
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static inline int ichg_reg_to_mA(int value)
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{
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return (value * 3900) / 1000;
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}
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static int da9052_read_chgend_current(struct da9052_battery *bat,
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int *current_mA)
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{
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int ret;
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if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING)
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return -EINVAL;
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ret = da9052_reg_read(bat->da9052, DA9052_ICHG_END_REG);
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if (ret < 0)
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return ret;
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*current_mA = ichg_reg_to_mA(ret & DA9052_ICHGEND_ICHGEND);
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return 0;
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}
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static int da9052_read_chg_current(struct da9052_battery *bat, int *current_mA)
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{
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int ret;
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if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING)
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return -EINVAL;
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ret = da9052_reg_read(bat->da9052, DA9052_ICHG_AV_REG);
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if (ret < 0)
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return ret;
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*current_mA = ichg_reg_to_mA(ret & DA9052_ICHGAV_ICHGAV);
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return 0;
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}
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static int da9052_bat_check_status(struct da9052_battery *bat, int *status)
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{
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u8 v[2] = {0, 0};
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u8 bat_status;
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u8 chg_end;
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int ret;
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int chg_current;
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int chg_end_current;
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bool dcinsel;
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bool dcindet;
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bool vbussel;
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bool vbusdet;
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bool dc;
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bool vbus;
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ret = da9052_group_read(bat->da9052, DA9052_STATUS_A_REG, 2, v);
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if (ret < 0)
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return ret;
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bat_status = v[0];
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chg_end = v[1];
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dcinsel = bat_status & DA9052_STATUSA_DCINSEL;
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dcindet = bat_status & DA9052_STATUSA_DCINDET;
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vbussel = bat_status & DA9052_STATUSA_VBUSSEL;
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vbusdet = bat_status & DA9052_STATUSA_VBUSDET;
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dc = dcinsel && dcindet;
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vbus = vbussel && vbusdet;
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/* Preference to WALL(DCIN) charger unit */
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if (dc || vbus) {
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bat->charger_type = DA9052_CHARGER;
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/* If charging end flag is set and Charging current is greater
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* than charging end limit then battery is charging
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*/
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if ((chg_end & DA9052_STATUSB_CHGEND) != 0) {
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ret = da9052_read_chg_current(bat, &chg_current);
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if (ret < 0)
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return ret;
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ret = da9052_read_chgend_current(bat, &chg_end_current);
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if (ret < 0)
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return ret;
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if (chg_current >= chg_end_current)
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bat->status = POWER_SUPPLY_STATUS_CHARGING;
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else
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bat->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
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} else {
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/* If Charging end flag is cleared then battery is
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* charging
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*/
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bat->status = POWER_SUPPLY_STATUS_CHARGING;
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}
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} else if (dcindet || vbusdet) {
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bat->charger_type = DA9052_CHARGER;
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bat->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
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} else {
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bat->charger_type = DA9052_NOCHARGER;
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bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
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}
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if (status != NULL)
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*status = bat->status;
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return 0;
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}
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static int da9052_bat_read_volt(struct da9052_battery *bat, int *volt_mV)
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{
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int volt;
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volt = da9052_adc_manual_read(bat->da9052, DA9052_ADC_MAN_MUXSEL_VBAT);
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if (volt < 0)
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return volt;
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*volt_mV = volt_reg_to_mV(volt);
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return 0;
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}
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static int da9052_bat_check_presence(struct da9052_battery *bat, int *illegal)
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{
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int bat_temp;
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bat_temp = da9052_adc_read_temp(bat->da9052);
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if (bat_temp < 0)
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return bat_temp;
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if (bat_temp > DA9052_BAT_TSH)
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*illegal = 1;
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else
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*illegal = 0;
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return 0;
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}
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static int da9052_bat_interpolate(int vbat_lower, int vbat_upper,
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int level_lower, int level_upper,
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int bat_voltage)
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{
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int tmp;
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tmp = ((level_upper - level_lower) * 1000) / (vbat_upper - vbat_lower);
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tmp = level_lower + (((bat_voltage - vbat_lower) * tmp) / 1000);
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return tmp;
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}
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static unsigned char da9052_determine_vc_tbl_index(unsigned char adc_temp)
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{
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int i;
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if (adc_temp <= vc_tbl_ref[0])
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return 0;
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if (adc_temp > vc_tbl_ref[DA9052_VC_TBL_REF_SZ - 1])
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return DA9052_VC_TBL_REF_SZ - 1;
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for (i = 0; i < DA9052_VC_TBL_REF_SZ; i++) {
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if ((adc_temp > vc_tbl_ref[i]) &&
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(adc_temp <= DA9052_MEAN(vc_tbl_ref[i], vc_tbl_ref[i + 1])))
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return i;
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if ((adc_temp > DA9052_MEAN(vc_tbl_ref[i], vc_tbl_ref[i + 1]))
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&& (adc_temp <= vc_tbl_ref[i]))
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return i + 1;
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}
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/*
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* For some reason authors of the driver didn't presume that we can
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* end up here. It might be OK, but might be not, no one knows for
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* sure. Go check your battery, is it on fire?
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*/
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WARN_ON(1);
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return 0;
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}
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static int da9052_bat_read_capacity(struct da9052_battery *bat, int *capacity)
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{
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int adc_temp;
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int bat_voltage;
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int vbat_lower;
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int vbat_upper;
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int level_upper;
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int level_lower;
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int ret;
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int flag;
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int i = 0;
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int j;
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ret = da9052_bat_read_volt(bat, &bat_voltage);
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if (ret < 0)
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return ret;
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adc_temp = da9052_adc_read_temp(bat->da9052);
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if (adc_temp < 0)
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return adc_temp;
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i = da9052_determine_vc_tbl_index(adc_temp);
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if (bat_voltage >= vc_tbl[i][0][0]) {
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*capacity = 100;
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return 0;
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}
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if (bat_voltage <= vc_tbl[i][DA9052_VC_TBL_SZ - 1][0]) {
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*capacity = 0;
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return 0;
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}
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flag = 0;
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for (j = 0; j < (DA9052_VC_TBL_SZ-1); j++) {
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if ((bat_voltage <= vc_tbl[i][j][0]) &&
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(bat_voltage >= vc_tbl[i][j + 1][0])) {
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vbat_upper = vc_tbl[i][j][0];
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vbat_lower = vc_tbl[i][j + 1][0];
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level_upper = vc_tbl[i][j][1];
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level_lower = vc_tbl[i][j + 1][1];
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flag = 1;
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break;
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}
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}
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if (!flag)
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return -EIO;
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*capacity = da9052_bat_interpolate(vbat_lower, vbat_upper, level_lower,
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level_upper, bat_voltage);
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return 0;
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}
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static int da9052_bat_check_health(struct da9052_battery *bat, int *health)
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{
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int ret;
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int bat_illegal;
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int capacity;
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ret = da9052_bat_check_presence(bat, &bat_illegal);
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if (ret < 0)
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return ret;
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if (bat_illegal) {
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bat->health = POWER_SUPPLY_HEALTH_UNKNOWN;
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return 0;
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}
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|
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if (bat->health != POWER_SUPPLY_HEALTH_OVERHEAT) {
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ret = da9052_bat_read_capacity(bat, &capacity);
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if (ret < 0)
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return ret;
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if (capacity < DA9052_BAT_LOW_CAP)
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bat->health = POWER_SUPPLY_HEALTH_DEAD;
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else
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bat->health = POWER_SUPPLY_HEALTH_GOOD;
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}
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*health = bat->health;
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return 0;
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}
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|
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static irqreturn_t da9052_bat_irq(int irq, void *data)
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{
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struct da9052_battery *bat = data;
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int virq;
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virq = regmap_irq_get_virq(bat->da9052->irq_data, irq);
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irq -= virq;
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|
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if (irq == DA9052_IRQ_CHGEND)
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bat->status = POWER_SUPPLY_STATUS_FULL;
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else
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da9052_bat_check_status(bat, NULL);
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|
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if (irq == DA9052_IRQ_CHGEND || irq == DA9052_IRQ_DCIN ||
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irq == DA9052_IRQ_VBUS || irq == DA9052_IRQ_TBAT) {
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power_supply_changed(&bat->psy);
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}
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return IRQ_HANDLED;
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}
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|
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static int da9052_USB_current_notifier(struct notifier_block *nb,
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unsigned long events, void *data)
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{
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u8 row;
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u8 col;
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int *current_mA = data;
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int ret;
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struct da9052_battery *bat = container_of(nb, struct da9052_battery,
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nb);
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|
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if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING)
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return -EPERM;
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|
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ret = da9052_reg_read(bat->da9052, DA9052_CHGBUCK_REG);
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if (ret & DA9052_CHG_USB_ILIM_MASK)
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return -EPERM;
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|
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if (bat->da9052->chip_id == DA9052)
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row = 0;
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else
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row = 1;
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|
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if (*current_mA < da9052_chg_current_lim[row][0] ||
|
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*current_mA > da9052_chg_current_lim[row][DA9052_CHG_LIM_COLS - 1])
|
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return -EINVAL;
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|
|
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 char *da9052_bat_irqs[] = {
|
|
"BATT TEMP",
|
|
"DCIN DET",
|
|
"DCIN REM",
|
|
"VBUS DET",
|
|
"VBUS REM",
|
|
"CHG END",
|
|
};
|
|
|
|
static int da9052_bat_irq_bits[] = {
|
|
DA9052_IRQ_TBAT,
|
|
DA9052_IRQ_DCIN,
|
|
DA9052_IRQ_DCINREM,
|
|
DA9052_IRQ_VBUS,
|
|
DA9052_IRQ_VBUSREM,
|
|
DA9052_IRQ_CHGEND,
|
|
};
|
|
|
|
static s32 da9052_bat_probe(struct platform_device *pdev)
|
|
{
|
|
struct da9052_pdata *pdata;
|
|
struct da9052_battery *bat;
|
|
int ret;
|
|
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++) {
|
|
ret = da9052_request_irq(bat->da9052,
|
|
da9052_bat_irq_bits[i], da9052_bat_irqs[i],
|
|
da9052_bat_irq, bat);
|
|
|
|
if (ret != 0) {
|
|
dev_err(bat->da9052->dev,
|
|
"DA9052 failed to request %s IRQ: %d\n",
|
|
da9052_bat_irqs[i], ret);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
ret = power_supply_register(&pdev->dev, &bat->psy);
|
|
if (ret)
|
|
goto err;
|
|
|
|
platform_set_drvdata(pdev, bat);
|
|
return 0;
|
|
|
|
err:
|
|
while (--i >= 0)
|
|
da9052_free_irq(bat->da9052, da9052_bat_irq_bits[i], bat);
|
|
|
|
kfree(bat);
|
|
return ret;
|
|
}
|
|
static int da9052_bat_remove(struct platform_device *pdev)
|
|
{
|
|
int i;
|
|
struct da9052_battery *bat = platform_get_drvdata(pdev);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(da9052_bat_irqs); i++)
|
|
da9052_free_irq(bat->da9052, da9052_bat_irq_bits[i], bat);
|
|
|
|
power_supply_unregister(&bat->psy);
|
|
kfree(bat);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver da9052_bat_driver = {
|
|
.probe = da9052_bat_probe,
|
|
.remove = da9052_bat_remove,
|
|
.driver = {
|
|
.name = "da9052-bat",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
module_platform_driver(da9052_bat_driver);
|
|
|
|
MODULE_DESCRIPTION("DA9052 BAT Device Driver");
|
|
MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:da9052-bat");
|