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bq24190_charger.c
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/*
* Driver for the TI bq24190 battery charger.
*
* Author: Mark A. Greer <mgreer@animalcreek.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/of_irq.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/power_supply.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/power/bq24190_charger.h>
#define BQ24190_MANUFACTURER "Texas Instruments"
#define BQ24190_REG_ISC 0x00 /* Input Source Control */
#define BQ24190_REG_ISC_EN_HIZ_MASK BIT(7)
#define BQ24190_REG_ISC_EN_HIZ_SHIFT 7
#define BQ24190_REG_ISC_VINDPM_MASK (BIT(6) | BIT(5) | BIT(4) | \
BIT(3))
#define BQ24190_REG_ISC_VINDPM_SHIFT 3
#define BQ24190_REG_ISC_IINLIM_MASK (BIT(2) | BIT(1) | BIT(0))
#define BQ24190_REG_ISC_IINLIM_SHIFT 0
#define BQ24190_REG_POC 0x01 /* Power-On Configuration */
#define BQ24190_REG_POC_RESET_MASK BIT(7)
#define BQ24190_REG_POC_RESET_SHIFT 7
#define BQ24190_REG_POC_WDT_RESET_MASK BIT(6)
#define BQ24190_REG_POC_WDT_RESET_SHIFT 6
#define BQ24190_REG_POC_CHG_CONFIG_MASK (BIT(5) | BIT(4))
#define BQ24190_REG_POC_CHG_CONFIG_SHIFT 4
#define BQ24190_REG_POC_SYS_MIN_MASK (BIT(3) | BIT(2) | BIT(1))
#define BQ24190_REG_POC_SYS_MIN_SHIFT 1
#define BQ24190_REG_POC_BOOST_LIM_MASK BIT(0)
#define BQ24190_REG_POC_BOOST_LIM_SHIFT 0
#define BQ24190_REG_CCC 0x02 /* Charge Current Control */
#define BQ24190_REG_CCC_ICHG_MASK (BIT(7) | BIT(6) | BIT(5) | \
BIT(4) | BIT(3) | BIT(2))
#define BQ24190_REG_CCC_ICHG_SHIFT 2
#define BQ24190_REG_CCC_FORCE_20PCT_MASK BIT(0)
#define BQ24190_REG_CCC_FORCE_20PCT_SHIFT 0
#define BQ24190_REG_PCTCC 0x03 /* Pre-charge/Termination Current Cntl */
#define BQ24190_REG_PCTCC_IPRECHG_MASK (BIT(7) | BIT(6) | BIT(5) | \
BIT(4))
#define BQ24190_REG_PCTCC_IPRECHG_SHIFT 4
#define BQ24190_REG_PCTCC_ITERM_MASK (BIT(3) | BIT(2) | BIT(1) | \
BIT(0))
#define BQ24190_REG_PCTCC_ITERM_SHIFT 0
#define BQ24190_REG_CVC 0x04 /* Charge Voltage Control */
#define BQ24190_REG_CVC_VREG_MASK (BIT(7) | BIT(6) | BIT(5) | \
BIT(4) | BIT(3) | BIT(2))
#define BQ24190_REG_CVC_VREG_SHIFT 2
#define BQ24190_REG_CVC_BATLOWV_MASK BIT(1)
#define BQ24190_REG_CVC_BATLOWV_SHIFT 1
#define BQ24190_REG_CVC_VRECHG_MASK BIT(0)
#define BQ24190_REG_CVC_VRECHG_SHIFT 0
#define BQ24190_REG_CTTC 0x05 /* Charge Term/Timer Control */
#define BQ24190_REG_CTTC_EN_TERM_MASK BIT(7)
#define BQ24190_REG_CTTC_EN_TERM_SHIFT 7
#define BQ24190_REG_CTTC_TERM_STAT_MASK BIT(6)
#define BQ24190_REG_CTTC_TERM_STAT_SHIFT 6
#define BQ24190_REG_CTTC_WATCHDOG_MASK (BIT(5) | BIT(4))
#define BQ24190_REG_CTTC_WATCHDOG_SHIFT 4
#define BQ24190_REG_CTTC_EN_TIMER_MASK BIT(3)
#define BQ24190_REG_CTTC_EN_TIMER_SHIFT 3
#define BQ24190_REG_CTTC_CHG_TIMER_MASK (BIT(2) | BIT(1))
#define BQ24190_REG_CTTC_CHG_TIMER_SHIFT 1
#define BQ24190_REG_CTTC_JEITA_ISET_MASK BIT(0)
#define BQ24190_REG_CTTC_JEITA_ISET_SHIFT 0
#define BQ24190_REG_ICTRC 0x06 /* IR Comp/Thermal Regulation Control */
#define BQ24190_REG_ICTRC_BAT_COMP_MASK (BIT(7) | BIT(6) | BIT(5))
#define BQ24190_REG_ICTRC_BAT_COMP_SHIFT 5
#define BQ24190_REG_ICTRC_VCLAMP_MASK (BIT(4) | BIT(3) | BIT(2))
#define BQ24190_REG_ICTRC_VCLAMP_SHIFT 2
#define BQ24190_REG_ICTRC_TREG_MASK (BIT(1) | BIT(0))
#define BQ24190_REG_ICTRC_TREG_SHIFT 0
#define BQ24190_REG_MOC 0x07 /* Misc. Operation Control */
#define BQ24190_REG_MOC_DPDM_EN_MASK BIT(7)
#define BQ24190_REG_MOC_DPDM_EN_SHIFT 7
#define BQ24190_REG_MOC_TMR2X_EN_MASK BIT(6)
#define BQ24190_REG_MOC_TMR2X_EN_SHIFT 6
#define BQ24190_REG_MOC_BATFET_DISABLE_MASK BIT(5)
#define BQ24190_REG_MOC_BATFET_DISABLE_SHIFT 5
#define BQ24190_REG_MOC_JEITA_VSET_MASK BIT(4)
#define BQ24190_REG_MOC_JEITA_VSET_SHIFT 4
#define BQ24190_REG_MOC_INT_MASK_MASK (BIT(1) | BIT(0))
#define BQ24190_REG_MOC_INT_MASK_SHIFT 0
#define BQ24190_REG_SS 0x08 /* System Status */
#define BQ24190_REG_SS_VBUS_STAT_MASK (BIT(7) | BIT(6))
#define BQ24190_REG_SS_VBUS_STAT_SHIFT 6
#define BQ24190_REG_SS_CHRG_STAT_MASK (BIT(5) | BIT(4))
#define BQ24190_REG_SS_CHRG_STAT_SHIFT 4
#define BQ24190_REG_SS_DPM_STAT_MASK BIT(3)
#define BQ24190_REG_SS_DPM_STAT_SHIFT 3
#define BQ24190_REG_SS_PG_STAT_MASK BIT(2)
#define BQ24190_REG_SS_PG_STAT_SHIFT 2
#define BQ24190_REG_SS_THERM_STAT_MASK BIT(1)
#define BQ24190_REG_SS_THERM_STAT_SHIFT 1
#define BQ24190_REG_SS_VSYS_STAT_MASK BIT(0)
#define BQ24190_REG_SS_VSYS_STAT_SHIFT 0
#define BQ24190_REG_F 0x09 /* Fault */
#define BQ24190_REG_F_WATCHDOG_FAULT_MASK BIT(7)
#define BQ24190_REG_F_WATCHDOG_FAULT_SHIFT 7
#define BQ24190_REG_F_BOOST_FAULT_MASK BIT(6)
#define BQ24190_REG_F_BOOST_FAULT_SHIFT 6
#define BQ24190_REG_F_CHRG_FAULT_MASK (BIT(5) | BIT(4))
#define BQ24190_REG_F_CHRG_FAULT_SHIFT 4
#define BQ24190_REG_F_BAT_FAULT_MASK BIT(3)
#define BQ24190_REG_F_BAT_FAULT_SHIFT 3
#define BQ24190_REG_F_NTC_FAULT_MASK (BIT(2) | BIT(1) | BIT(0))
#define BQ24190_REG_F_NTC_FAULT_SHIFT 0
#define BQ24190_REG_VPRS 0x0A /* Vendor/Part/Revision Status */
#define BQ24190_REG_VPRS_PN_MASK (BIT(5) | BIT(4) | BIT(3))
#define BQ24190_REG_VPRS_PN_SHIFT 3
#define BQ24190_REG_VPRS_PN_24190 0x4
#define BQ24190_REG_VPRS_PN_24192 0x5 /* Also 24193 */
#define BQ24190_REG_VPRS_PN_24192I 0x3
#define BQ24190_REG_VPRS_TS_PROFILE_MASK BIT(2)
#define BQ24190_REG_VPRS_TS_PROFILE_SHIFT 2
#define BQ24190_REG_VPRS_DEV_REG_MASK (BIT(1) | BIT(0))
#define BQ24190_REG_VPRS_DEV_REG_SHIFT 0
/*
* The FAULT register is latched by the bq24190 (except for NTC_FAULT)
* so the first read after a fault returns the latched value and subsequent
* reads return the current value. In order to return the fault status
* to the user, have the interrupt handler save the reg's value and retrieve
* it in the appropriate health/status routine. Each routine has its own
* flag indicating whether it should use the value stored by the last run
* of the interrupt handler or do an actual reg read. That way each routine
* can report back whatever fault may have occured.
*/
struct bq24190_dev_info {
struct i2c_client *client;
struct device *dev;
struct power_supply charger;
struct power_supply battery;
char model_name[I2C_NAME_SIZE];
kernel_ulong_t model;
unsigned int gpio_int;
unsigned int irq;
struct mutex f_reg_lock;
bool first_time;
bool charger_health_valid;
bool battery_health_valid;
bool battery_status_valid;
u8 f_reg;
u8 ss_reg;
u8 watchdog;
};
/*
* The tables below provide a 2-way mapping for the value that goes in
* the register field and the real-world value that it represents.
* The index of the array is the value that goes in the register; the
* number at that index in the array is the real-world value that it
* represents.
*/
/* REG02[7:2] (ICHG) in uAh */
static const int bq24190_ccc_ichg_values[] = {
512000, 576000, 640000, 704000, 768000, 832000, 896000, 960000,
1024000, 1088000, 1152000, 1216000, 1280000, 1344000, 1408000, 1472000,
1536000, 1600000, 1664000, 1728000, 1792000, 1856000, 1920000, 1984000,
2048000, 2112000, 2176000, 2240000, 2304000, 2368000, 2432000, 2496000,
2560000, 2624000, 2688000, 2752000, 2816000, 2880000, 2944000, 3008000,
3072000, 3136000, 3200000, 3264000, 3328000, 3392000, 3456000, 3520000,
3584000, 3648000, 3712000, 3776000, 3840000, 3904000, 3968000, 4032000,
4096000, 4160000, 4224000, 4288000, 4352000, 4416000, 4480000, 4544000
};
/* REG04[7:2] (VREG) in uV */
static const int bq24190_cvc_vreg_values[] = {
3504000, 3520000, 3536000, 3552000, 3568000, 3584000, 3600000, 3616000,
3632000, 3648000, 3664000, 3680000, 3696000, 3712000, 3728000, 3744000,
3760000, 3776000, 3792000, 3808000, 3824000, 3840000, 3856000, 3872000,
3888000, 3904000, 3920000, 3936000, 3952000, 3968000, 3984000, 4000000,
4016000, 4032000, 4048000, 4064000, 4080000, 4096000, 4112000, 4128000,
4144000, 4160000, 4176000, 4192000, 4208000, 4224000, 4240000, 4256000,
4272000, 4288000, 4304000, 4320000, 4336000, 4352000, 4368000, 4384000,
4400000
};
/* REG06[1:0] (TREG) in tenths of degrees Celcius */
static const int bq24190_ictrc_treg_values[] = {
600, 800, 1000, 1200
};
/*
* Return the index in 'tbl' of greatest value that is less than or equal to
* 'val'. The index range returned is 0 to 'tbl_size' - 1. Assumes that
* the values in 'tbl' are sorted from smallest to largest and 'tbl_size'
* is less than 2^8.
*/
static u8 bq24190_find_idx(const int tbl[], int tbl_size, int v)
{
int i;
for (i = 1; i < tbl_size; i++)
if (v < tbl[i])
break;
return i - 1;
}
/* Basic driver I/O routines */
static int bq24190_read(struct bq24190_dev_info *bdi, u8 reg, u8 *data)
{
int ret;
ret = i2c_smbus_read_byte_data(bdi->client, reg);
if (ret < 0)
return ret;
*data = ret;
return 0;
}
static int bq24190_write(struct bq24190_dev_info *bdi, u8 reg, u8 data)
{
return i2c_smbus_write_byte_data(bdi->client, reg, data);
}
static int bq24190_read_mask(struct bq24190_dev_info *bdi, u8 reg,
u8 mask, u8 shift, u8 *data)
{
u8 v;
int ret;
ret = bq24190_read(bdi, reg, &v);
if (ret < 0)
return ret;
v &= mask;
v >>= shift;
*data = v;
return 0;
}
static int bq24190_write_mask(struct bq24190_dev_info *bdi, u8 reg,
u8 mask, u8 shift, u8 data)
{
u8 v;
int ret;
ret = bq24190_read(bdi, reg, &v);
if (ret < 0)
return ret;
v &= ~mask;
v |= ((data << shift) & mask);
return bq24190_write(bdi, reg, v);
}
static int bq24190_get_field_val(struct bq24190_dev_info *bdi,
u8 reg, u8 mask, u8 shift,
const int tbl[], int tbl_size,
int *val)
{
u8 v;
int ret;
ret = bq24190_read_mask(bdi, reg, mask, shift, &v);
if (ret < 0)
return ret;
v = (v >= tbl_size) ? (tbl_size - 1) : v;
*val = tbl[v];
return 0;
}
static int bq24190_set_field_val(struct bq24190_dev_info *bdi,
u8 reg, u8 mask, u8 shift,
const int tbl[], int tbl_size,
int val)
{
u8 idx;
idx = bq24190_find_idx(tbl, tbl_size, val);
return bq24190_write_mask(bdi, reg, mask, shift, idx);
}
#ifdef CONFIG_SYSFS
/*
* There are a numerous options that are configurable on the bq24190
* that go well beyond what the power_supply properties provide access to.
* Provide sysfs access to them so they can be examined and possibly modified
* on the fly. They will be provided for the charger power_supply object only
* and will be prefixed by 'f_' to make them easier to recognize.
*/
#define BQ24190_SYSFS_FIELD(_name, r, f, m, store) \
{ \
.attr = __ATTR(f_##_name, m, bq24190_sysfs_show, store), \
.reg = BQ24190_REG_##r, \
.mask = BQ24190_REG_##r##_##f##_MASK, \
.shift = BQ24190_REG_##r##_##f##_SHIFT, \
}
#define BQ24190_SYSFS_FIELD_RW(_name, r, f) \
BQ24190_SYSFS_FIELD(_name, r, f, S_IWUSR | S_IRUGO, \
bq24190_sysfs_store)
#define BQ24190_SYSFS_FIELD_RO(_name, r, f) \
BQ24190_SYSFS_FIELD(_name, r, f, S_IRUGO, NULL)
static ssize_t bq24190_sysfs_show(struct device *dev,
struct device_attribute *attr, char *buf);
static ssize_t bq24190_sysfs_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count);
struct bq24190_sysfs_field_info {
struct device_attribute attr;
u8 reg;
u8 mask;
u8 shift;
};
/* On i386 ptrace-abi.h defines SS that breaks the macro calls below. */
#undef SS
static struct bq24190_sysfs_field_info bq24190_sysfs_field_tbl[] = {
/* sysfs name reg field in reg */
BQ24190_SYSFS_FIELD_RW(en_hiz, ISC, EN_HIZ),
BQ24190_SYSFS_FIELD_RW(vindpm, ISC, VINDPM),
BQ24190_SYSFS_FIELD_RW(iinlim, ISC, IINLIM),
BQ24190_SYSFS_FIELD_RW(chg_config, POC, CHG_CONFIG),
BQ24190_SYSFS_FIELD_RW(sys_min, POC, SYS_MIN),
BQ24190_SYSFS_FIELD_RW(boost_lim, POC, BOOST_LIM),
BQ24190_SYSFS_FIELD_RW(ichg, CCC, ICHG),
BQ24190_SYSFS_FIELD_RW(force_20_pct, CCC, FORCE_20PCT),
BQ24190_SYSFS_FIELD_RW(iprechg, PCTCC, IPRECHG),
BQ24190_SYSFS_FIELD_RW(iterm, PCTCC, ITERM),
BQ24190_SYSFS_FIELD_RW(vreg, CVC, VREG),
BQ24190_SYSFS_FIELD_RW(batlowv, CVC, BATLOWV),
BQ24190_SYSFS_FIELD_RW(vrechg, CVC, VRECHG),
BQ24190_SYSFS_FIELD_RW(en_term, CTTC, EN_TERM),
BQ24190_SYSFS_FIELD_RW(term_stat, CTTC, TERM_STAT),
BQ24190_SYSFS_FIELD_RO(watchdog, CTTC, WATCHDOG),
BQ24190_SYSFS_FIELD_RW(en_timer, CTTC, EN_TIMER),
BQ24190_SYSFS_FIELD_RW(chg_timer, CTTC, CHG_TIMER),
BQ24190_SYSFS_FIELD_RW(jeta_iset, CTTC, JEITA_ISET),
BQ24190_SYSFS_FIELD_RW(bat_comp, ICTRC, BAT_COMP),
BQ24190_SYSFS_FIELD_RW(vclamp, ICTRC, VCLAMP),
BQ24190_SYSFS_FIELD_RW(treg, ICTRC, TREG),
BQ24190_SYSFS_FIELD_RW(dpdm_en, MOC, DPDM_EN),
BQ24190_SYSFS_FIELD_RW(tmr2x_en, MOC, TMR2X_EN),
BQ24190_SYSFS_FIELD_RW(batfet_disable, MOC, BATFET_DISABLE),
BQ24190_SYSFS_FIELD_RW(jeita_vset, MOC, JEITA_VSET),
BQ24190_SYSFS_FIELD_RO(int_mask, MOC, INT_MASK),
BQ24190_SYSFS_FIELD_RO(vbus_stat, SS, VBUS_STAT),
BQ24190_SYSFS_FIELD_RO(chrg_stat, SS, CHRG_STAT),
BQ24190_SYSFS_FIELD_RO(dpm_stat, SS, DPM_STAT),
BQ24190_SYSFS_FIELD_RO(pg_stat, SS, PG_STAT),
BQ24190_SYSFS_FIELD_RO(therm_stat, SS, THERM_STAT),
BQ24190_SYSFS_FIELD_RO(vsys_stat, SS, VSYS_STAT),
BQ24190_SYSFS_FIELD_RO(watchdog_fault, F, WATCHDOG_FAULT),
BQ24190_SYSFS_FIELD_RO(boost_fault, F, BOOST_FAULT),
BQ24190_SYSFS_FIELD_RO(chrg_fault, F, CHRG_FAULT),
BQ24190_SYSFS_FIELD_RO(bat_fault, F, BAT_FAULT),
BQ24190_SYSFS_FIELD_RO(ntc_fault, F, NTC_FAULT),
BQ24190_SYSFS_FIELD_RO(pn, VPRS, PN),
BQ24190_SYSFS_FIELD_RO(ts_profile, VPRS, TS_PROFILE),
BQ24190_SYSFS_FIELD_RO(dev_reg, VPRS, DEV_REG),
};
static struct attribute *
bq24190_sysfs_attrs[ARRAY_SIZE(bq24190_sysfs_field_tbl) + 1];
static const struct attribute_group bq24190_sysfs_attr_group = {
.attrs = bq24190_sysfs_attrs,
};
static void bq24190_sysfs_init_attrs(void)
{
int i, limit = ARRAY_SIZE(bq24190_sysfs_field_tbl);
for (i = 0; i < limit; i++)
bq24190_sysfs_attrs[i] = &bq24190_sysfs_field_tbl[i].attr.attr;
bq24190_sysfs_attrs[limit] = NULL; /* Has additional entry for this */
}
static struct bq24190_sysfs_field_info *bq24190_sysfs_field_lookup(
const char *name)
{
int i, limit = ARRAY_SIZE(bq24190_sysfs_field_tbl);
for (i = 0; i < limit; i++)
if (!strcmp(name, bq24190_sysfs_field_tbl[i].attr.attr.name))
break;
if (i >= limit)
return NULL;
return &bq24190_sysfs_field_tbl[i];
}
static ssize_t bq24190_sysfs_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct power_supply *psy = dev_get_drvdata(dev);
struct bq24190_dev_info *bdi =
container_of(psy, struct bq24190_dev_info, charger);
struct bq24190_sysfs_field_info *info;
int ret;
u8 v;
info = bq24190_sysfs_field_lookup(attr->attr.name);
if (!info)
return -EINVAL;
ret = bq24190_read_mask(bdi, info->reg, info->mask, info->shift, &v);
if (ret)
return ret;
return scnprintf(buf, PAGE_SIZE, "%hhx\n", v);
}
static ssize_t bq24190_sysfs_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct power_supply *psy = dev_get_drvdata(dev);
struct bq24190_dev_info *bdi =
container_of(psy, struct bq24190_dev_info, charger);
struct bq24190_sysfs_field_info *info;
int ret;
u8 v;
info = bq24190_sysfs_field_lookup(attr->attr.name);
if (!info)
return -EINVAL;
ret = kstrtou8(buf, 0, &v);
if (ret < 0)
return ret;
ret = bq24190_write_mask(bdi, info->reg, info->mask, info->shift, v);
if (ret)
return ret;
return count;
}
static int bq24190_sysfs_create_group(struct bq24190_dev_info *bdi)
{
bq24190_sysfs_init_attrs();
return sysfs_create_group(&bdi->charger.dev->kobj,
&bq24190_sysfs_attr_group);
}
static void bq24190_sysfs_remove_group(struct bq24190_dev_info *bdi)
{
sysfs_remove_group(&bdi->charger.dev->kobj, &bq24190_sysfs_attr_group);
}
#else
static int bq24190_sysfs_create_group(struct bq24190_dev_info *bdi)
{
return 0;
}
static inline void bq24190_sysfs_remove_group(struct bq24190_dev_info *bdi) {}
#endif
/*
* According to the "Host Mode and default Mode" section of the
* manual, a write to any register causes the bq24190 to switch
* from default mode to host mode. It will switch back to default
* mode after a WDT timeout unless the WDT is turned off as well.
* So, by simply turning off the WDT, we accomplish both with the
* same write.
*/
static int bq24190_set_mode_host(struct bq24190_dev_info *bdi)
{
int ret;
u8 v;
ret = bq24190_read(bdi, BQ24190_REG_CTTC, &v);
if (ret < 0)
return ret;
bdi->watchdog = ((v & BQ24190_REG_CTTC_WATCHDOG_MASK) >>
BQ24190_REG_CTTC_WATCHDOG_SHIFT);
v &= ~BQ24190_REG_CTTC_WATCHDOG_MASK;
return bq24190_write(bdi, BQ24190_REG_CTTC, v);
}
static int bq24190_register_reset(struct bq24190_dev_info *bdi)
{
int ret, limit = 100;
u8 v;
/* Reset the registers */
ret = bq24190_write_mask(bdi, BQ24190_REG_POC,
BQ24190_REG_POC_RESET_MASK,
BQ24190_REG_POC_RESET_SHIFT,
0x1);
if (ret < 0)
return ret;
/* Reset bit will be cleared by hardware so poll until it is */
do {
ret = bq24190_read_mask(bdi, BQ24190_REG_POC,
BQ24190_REG_POC_RESET_MASK,
BQ24190_REG_POC_RESET_SHIFT,
&v);
if (ret < 0)
return ret;
if (!v)
break;
udelay(10);
} while (--limit);
if (!limit)
return -EIO;
return 0;
}
/* Charger power supply property routines */
static int bq24190_charger_get_charge_type(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 v;
int type, ret;
ret = bq24190_read_mask(bdi, BQ24190_REG_POC,
BQ24190_REG_POC_CHG_CONFIG_MASK,
BQ24190_REG_POC_CHG_CONFIG_SHIFT,
&v);
if (ret < 0)
return ret;
/* If POC[CHG_CONFIG] (REG01[5:4]) == 0, charge is disabled */
if (!v) {
type = POWER_SUPPLY_CHARGE_TYPE_NONE;
} else {
ret = bq24190_read_mask(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_FORCE_20PCT_MASK,
BQ24190_REG_CCC_FORCE_20PCT_SHIFT,
&v);
if (ret < 0)
return ret;
type = (v) ? POWER_SUPPLY_CHARGE_TYPE_TRICKLE :
POWER_SUPPLY_CHARGE_TYPE_FAST;
}
val->intval = type;
return 0;
}
static int bq24190_charger_set_charge_type(struct bq24190_dev_info *bdi,
const union power_supply_propval *val)
{
u8 chg_config, force_20pct, en_term;
int ret;
/*
* According to the "Termination when REG02[0] = 1" section of
* the bq24190 manual, the trickle charge could be less than the
* termination current so it recommends turning off the termination
* function.
*
* Note: AFAICT from the datasheet, the user will have to manually
* turn off the charging when in 20% mode. If its not turned off,
* there could be battery damage. So, use this mode at your own risk.
*/
switch (val->intval) {
case POWER_SUPPLY_CHARGE_TYPE_NONE:
chg_config = 0x0;
break;
case POWER_SUPPLY_CHARGE_TYPE_TRICKLE:
chg_config = 0x1;
force_20pct = 0x1;
en_term = 0x0;
break;
case POWER_SUPPLY_CHARGE_TYPE_FAST:
chg_config = 0x1;
force_20pct = 0x0;
en_term = 0x1;
break;
default:
return -EINVAL;
}
if (chg_config) { /* Enabling the charger */
ret = bq24190_write_mask(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_FORCE_20PCT_MASK,
BQ24190_REG_CCC_FORCE_20PCT_SHIFT,
force_20pct);
if (ret < 0)
return ret;
ret = bq24190_write_mask(bdi, BQ24190_REG_CTTC,
BQ24190_REG_CTTC_EN_TERM_MASK,
BQ24190_REG_CTTC_EN_TERM_SHIFT,
en_term);
if (ret < 0)
return ret;
}
return bq24190_write_mask(bdi, BQ24190_REG_POC,
BQ24190_REG_POC_CHG_CONFIG_MASK,
BQ24190_REG_POC_CHG_CONFIG_SHIFT, chg_config);
}
static int bq24190_charger_get_health(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 v;
int health, ret;
mutex_lock(&bdi->f_reg_lock);
if (bdi->charger_health_valid) {
v = bdi->f_reg;
bdi->charger_health_valid = false;
mutex_unlock(&bdi->f_reg_lock);
} else {
mutex_unlock(&bdi->f_reg_lock);
ret = bq24190_read(bdi, BQ24190_REG_F, &v);
if (ret < 0)
return ret;
}
if (v & BQ24190_REG_F_BOOST_FAULT_MASK) {
/*
* This could be over-current or over-voltage but there's
* no way to tell which. Return 'OVERVOLTAGE' since there
* isn't an 'OVERCURRENT' value defined that we can return
* even if it was over-current.
*/
health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
} else {
v &= BQ24190_REG_F_CHRG_FAULT_MASK;
v >>= BQ24190_REG_F_CHRG_FAULT_SHIFT;
switch (v) {
case 0x0: /* Normal */
health = POWER_SUPPLY_HEALTH_GOOD;
break;
case 0x1: /* Input Fault (VBUS OVP or VBAT<VBUS<3.8V) */
/*
* This could be over-voltage or under-voltage
* and there's no way to tell which. Instead
* of looking foolish and returning 'OVERVOLTAGE'
* when its really under-voltage, just return
* 'UNSPEC_FAILURE'.
*/
health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
break;
case 0x2: /* Thermal Shutdown */
health = POWER_SUPPLY_HEALTH_OVERHEAT;
break;
case 0x3: /* Charge Safety Timer Expiration */
health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
break;
default:
health = POWER_SUPPLY_HEALTH_UNKNOWN;
}
}
val->intval = health;
return 0;
}
static int bq24190_charger_get_online(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 v;
int ret;
ret = bq24190_read_mask(bdi, BQ24190_REG_SS,
BQ24190_REG_SS_PG_STAT_MASK,
BQ24190_REG_SS_PG_STAT_SHIFT, &v);
if (ret < 0)
return ret;
val->intval = v;
return 0;
}
static int bq24190_charger_get_current(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 v;
int curr, ret;
ret = bq24190_get_field_val(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_ICHG_MASK, BQ24190_REG_CCC_ICHG_SHIFT,
bq24190_ccc_ichg_values,
ARRAY_SIZE(bq24190_ccc_ichg_values), &curr);
if (ret < 0)
return ret;
ret = bq24190_read_mask(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_FORCE_20PCT_MASK,
BQ24190_REG_CCC_FORCE_20PCT_SHIFT, &v);
if (ret < 0)
return ret;
/* If FORCE_20PCT is enabled, then current is 20% of ICHG value */
if (v)
curr /= 5;
val->intval = curr;
return 0;
}
static int bq24190_charger_get_current_max(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
int idx = ARRAY_SIZE(bq24190_ccc_ichg_values) - 1;
val->intval = bq24190_ccc_ichg_values[idx];
return 0;
}
static int bq24190_charger_set_current(struct bq24190_dev_info *bdi,
const union power_supply_propval *val)
{
u8 v;
int ret, curr = val->intval;
ret = bq24190_read_mask(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_FORCE_20PCT_MASK,
BQ24190_REG_CCC_FORCE_20PCT_SHIFT, &v);
if (ret < 0)
return ret;
/* If FORCE_20PCT is enabled, have to multiply value passed in by 5 */
if (v)
curr *= 5;
return bq24190_set_field_val(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_ICHG_MASK, BQ24190_REG_CCC_ICHG_SHIFT,
bq24190_ccc_ichg_values,
ARRAY_SIZE(bq24190_ccc_ichg_values), curr);
}
static int bq24190_charger_get_voltage(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
int voltage, ret;
ret = bq24190_get_field_val(bdi, BQ24190_REG_CVC,
BQ24190_REG_CVC_VREG_MASK, BQ24190_REG_CVC_VREG_SHIFT,
bq24190_cvc_vreg_values,
ARRAY_SIZE(bq24190_cvc_vreg_values), &voltage);
if (ret < 0)
return ret;
val->intval = voltage;
return 0;
}
static int bq24190_charger_get_voltage_max(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
int idx = ARRAY_SIZE(bq24190_cvc_vreg_values) - 1;
val->intval = bq24190_cvc_vreg_values[idx];
return 0;
}
static int bq24190_charger_set_voltage(struct bq24190_dev_info *bdi,
const union power_supply_propval *val)
{
return bq24190_set_field_val(bdi, BQ24190_REG_CVC,
BQ24190_REG_CVC_VREG_MASK, BQ24190_REG_CVC_VREG_SHIFT,
bq24190_cvc_vreg_values,
ARRAY_SIZE(bq24190_cvc_vreg_values), val->intval);
}
static int bq24190_charger_get_property(struct power_supply *psy,
enum power_supply_property psp, union power_supply_propval *val)
{
struct bq24190_dev_info *bdi =
container_of(psy, struct bq24190_dev_info, charger);
int ret;
dev_dbg(bdi->dev, "prop: %d\n", psp);
pm_runtime_get_sync(bdi->dev);
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_TYPE:
ret = bq24190_charger_get_charge_type(bdi, val);
break;
case POWER_SUPPLY_PROP_HEALTH:
ret = bq24190_charger_get_health(bdi, val);
break;
case POWER_SUPPLY_PROP_ONLINE:
ret = bq24190_charger_get_online(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = bq24190_charger_get_current(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
ret = bq24190_charger_get_current_max(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = bq24190_charger_get_voltage(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
ret = bq24190_charger_get_voltage_max(bdi, val);
break;
case POWER_SUPPLY_PROP_SCOPE:
val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
ret = 0;
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = bdi->model_name;
ret = 0;
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = BQ24190_MANUFACTURER;
ret = 0;
break;
default:
ret = -ENODATA;
}
pm_runtime_put_sync(bdi->dev);
return ret;
}
static int bq24190_charger_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct bq24190_dev_info *bdi =
container_of(psy, struct bq24190_dev_info, charger);
int ret;
dev_dbg(bdi->dev, "prop: %d\n", psp);
pm_runtime_get_sync(bdi->dev);
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_TYPE:
ret = bq24190_charger_set_charge_type(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = bq24190_charger_set_current(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = bq24190_charger_set_voltage(bdi, val);
break;
default:
ret = -EINVAL;
}
pm_runtime_put_sync(bdi->dev);
return ret;
}
static int bq24190_charger_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_TYPE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = 1;
break;
default:
ret = 0;
}
return ret;
}
static enum power_supply_property bq24190_charger_properties[] = {
POWER_SUPPLY_PROP_TYPE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_SCOPE,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static char *bq24190_charger_supplied_to[] = {
"main-battery",
};
static void bq24190_charger_init(struct power_supply *charger)
{
charger->name = "bq24190-charger";
charger->type = POWER_SUPPLY_TYPE_USB;
charger->properties = bq24190_charger_properties;
charger->num_properties = ARRAY_SIZE(bq24190_charger_properties);
charger->supplied_to = bq24190_charger_supplied_to;
charger->num_supplies = ARRAY_SIZE(bq24190_charger_supplied_to);
charger->get_property = bq24190_charger_get_property;
charger->set_property = bq24190_charger_set_property;
charger->property_is_writeable = bq24190_charger_property_is_writeable;
}
/* Battery power supply property routines */
static int bq24190_battery_get_status(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 ss_reg, chrg_fault;
int status, ret;
mutex_lock(&bdi->f_reg_lock);
if (bdi->battery_status_valid) {
chrg_fault = bdi->f_reg;
bdi->battery_status_valid = false;
mutex_unlock(&bdi->f_reg_lock);
} else {
mutex_unlock(&bdi->f_reg_lock);
ret = bq24190_read(bdi, BQ24190_REG_F, &chrg_fault);
if (ret < 0)
return ret;
}
chrg_fault &= BQ24190_REG_F_CHRG_FAULT_MASK;
chrg_fault >>= BQ24190_REG_F_CHRG_FAULT_SHIFT;
ret = bq24190_read(bdi, BQ24190_REG_SS, &ss_reg);
if (ret < 0)
return ret;
/*
* The battery must be discharging when any of these are true:
* - there is no good power source;
* - there is a charge fault.
* Could also be discharging when in "supplement mode" but
* there is no way to tell when its in that mode.
*/
if (!(ss_reg & BQ24190_REG_SS_PG_STAT_MASK) || chrg_fault) {
status = POWER_SUPPLY_STATUS_DISCHARGING;
} else {
ss_reg &= BQ24190_REG_SS_CHRG_STAT_MASK;
ss_reg >>= BQ24190_REG_SS_CHRG_STAT_SHIFT;
switch (ss_reg) {
case 0x0: /* Not Charging */
status = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case 0x1: /* Pre-charge */
case 0x2: /* Fast Charging */
status = POWER_SUPPLY_STATUS_CHARGING;
break;
case 0x3: /* Charge Termination Done */
status = POWER_SUPPLY_STATUS_FULL;
break;
default:
ret = -EIO;
}
}
if (!ret)
val->intval = status;
return ret;
}