diff options
Diffstat (limited to 'arch/arm/mach-exynos/charger-slp.c')
| -rw-r--r-- | arch/arm/mach-exynos/charger-slp.c | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/charger-slp.c b/arch/arm/mach-exynos/charger-slp.c new file mode 100644 index 0000000..c8bdefe --- /dev/null +++ b/arch/arm/mach-exynos/charger-slp.c @@ -0,0 +1,271 @@ +/* + * linux/arch/arm/mach-exynos/charger-slp.c + * COPYRIGHT(C) 2011 + * MyungJoo Ham <myungjoo.ham@samsung.com> + * + * Charger Support with Charger-Manager Framework + * + */ + +#include <linux/io.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> +#include <linux/power/charger-manager.h> +#include <linux/hwmon.h> +#include <linux/platform_data/ntc_thermistor.h> + +#include <plat/adc.h> +#include <plat/pm.h> + +#include <mach/regs-pmu.h> +#include <mach/irqs.h> + +#include "board-mobile.h" + +#define S5P_WAKEUP_STAT_WKSRC_MASK 0x000ffe3f +#define ADC_SAMPLING_CNT 7 +#define SDI_2100MA_BATT 4350000 + +/* Temperatures in milli-centigrade */ +#define SECBATTSPEC_TEMP_HIGH (65 * 1000) +#define SECBATTSPEC_TEMP_HIGH_REC (43 * 1000) +#define SECBATTSPEC_TEMP_LOW (-5 * 1000) +#define SECBATTSPEC_TEMP_LOW_REC (0 * 1000) + +#ifdef CONFIG_SENSORS_NTC_THERMISTOR +struct platform_device midas_ncp15wb473_thermistor; +static int ntc_adc_num = -EINVAL; /* Uninitialized */ +static struct s3c_adc_client *ntc_adc; + +int __init adc_ntc_init(int port) +{ + int err = 0; + + if (port < 0 || port > 9) + return -EINVAL; + ntc_adc_num = port; + + ntc_adc = s3c_adc_register(&midas_ncp15wb473_thermistor, + NULL, NULL, 0); + if (IS_ERR(ntc_adc)) { + err = PTR_ERR(ntc_adc); + ntc_adc = NULL; + return err; + } + + return 0; +} + +static int read_thermistor_uV(void) +{ + int val, i; + int adc_min = 0; + int adc_max = 0; + int adc_total = 0; + + s64 converted; + + WARN(ntc_adc == NULL || ntc_adc_num < 0, + "NTC-ADC is not initialized for %s.\n", __func__); + + for (i = 0; i < ADC_SAMPLING_CNT; i++) { + val = s3c_adc_read(ntc_adc, ntc_adc_num); + if (val < 0) { + pr_err("%s : read failed.(%d).\n", __func__, val); + return -EAGAIN; + } + + if (i != 0) { + if (val > adc_max) + adc_max = val; + else if (val < adc_min) + adc_min = val; + } else { + adc_max = val; + adc_min = val; + } + + adc_total += val; + } + + val = (adc_total - (adc_max + adc_min)) / (ADC_SAMPLING_CNT - 2); + + /* Multiplied by maximum input voltage */ + converted = 1800000LL * (s64) val; + /* Divided by resolution */ + converted >>= 12; + + return converted; +} + +static struct ntc_thermistor_platform_data ncp15wb473_pdata = { + .read_uV = read_thermistor_uV, + .pullup_uV = 1800000, /* VCC_1.8V_AP */ + .pullup_ohm = 100000, /* 100K */ + .pulldown_ohm = 100000, /* 100K */ + .connect = NTC_CONNECTED_GROUND, +}; + +static int __read_thermistor_mC(int *mC) +{ + int ret; + static struct device *hwmon; + static struct hwmon_property *entry; + + if (ntc_adc_num == -EINVAL) + return -ENODEV; + + if (hwmon == NULL) + hwmon = hwmon_find_device(&midas_ncp15wb473_thermistor.dev); + + if (IS_ERR_OR_NULL(hwmon)) { + hwmon = NULL; + return -ENODEV; + } + + if (entry == NULL) + entry = hwmon_get_property(hwmon, "temp1_input"); + if (IS_ERR_OR_NULL(entry)) { + entry = NULL; + return -ENODEV; + } + + ret = hwmon_get_value(hwmon, entry, mC); + if (ret < 0) { + entry = NULL; + return ret; + } + + return 0; +} +#else +static int __read_thermistor_mC(int *mC) +{ + *mC = 25000; + return 0; +} +#endif + +enum temp_stat { TEMP_OK = 0, TEMP_HOT = 1, TEMP_COLD = -1 }; + +static int midas_thermistor_ck(int *mC) +{ + static enum temp_stat state = TEMP_OK; + + __read_thermistor_mC(mC); + + switch (state) { + case TEMP_OK: + if (*mC >= SECBATTSPEC_TEMP_HIGH) + state = TEMP_HOT; + else if (*mC <= SECBATTSPEC_TEMP_LOW) + state = TEMP_COLD; + break; + case TEMP_HOT: + if (*mC <= SECBATTSPEC_TEMP_LOW) + state = TEMP_COLD; + else if (*mC < SECBATTSPEC_TEMP_HIGH_REC) + state = TEMP_OK; + break; + case TEMP_COLD: + if (*mC >= SECBATTSPEC_TEMP_HIGH) + state = TEMP_HOT; + else if (*mC > SECBATTSPEC_TEMP_LOW_REC) + state = TEMP_OK; + default: + pr_err("%s has invalid state %d\n", __func__, state); + } + + return state; +} + +static bool s3c_wksrc_rtc_alarm(void) +{ + u32 reg = s3c_suspend_wakeup_stat & S5P_WAKEUP_STAT_WKSRC_MASK; + + if ((reg & S5P_WAKEUP_STAT_RTCALARM) && + !(reg & ~S5P_WAKEUP_STAT_RTCALARM)) + return true; /* yes, it is */ + + return false; +} + +static char *midas_charger_stats[] = { +#if defined(CONFIG_BATTERY_MAX77693_CHARGER) + "max77693-charger", +#endif + NULL }; + +struct charger_cable charger_cable_vinchg1[] = { + { + .extcon_name = "max77693-muic", + .name = "USB", + .min_uA = 475000, + .max_uA = 475000 + 25000, + }, { + .extcon_name = "max77693-muic", + .name = "TA", + .min_uA = 650000, + .max_uA = 650000 + 25000, + }, { + .extcon_name = "max77693-muic", + .name = "MHL", + }, +}; + +static struct charger_regulator midas_regulators[] = { + { + .regulator_name = "vinchg1", + .cables = charger_cable_vinchg1, + .num_cables = ARRAY_SIZE(charger_cable_vinchg1), + }, +}; + +static struct charger_desc midas_charger_desc = { + .psy_name = "battery", + .polling_interval_ms = 30000, + .polling_mode = CM_POLL_EXTERNAL_POWER_ONLY, + .fullbatt_vchkdrop_ms = 30000, + .fullbatt_vchkdrop_uV = 50000, + .fullbatt_uV = 4200000, + .battery_present = CM_CHARGER_STAT, + .psy_charger_stat = midas_charger_stats, + .psy_fuel_gauge = "max17047-fuelgauge", + .is_temperature_error = midas_thermistor_ck, + .measure_ambient_temp = true, + .measure_battery_temp = false, + .soc_margin = 0, + + .charger_regulators = midas_regulators, + .num_charger_regulators = ARRAY_SIZE(midas_regulators), +}; + +struct charger_global_desc midas_charger_g_desc = { + .rtc = "rtc0", + .is_rtc_only_wakeup_reason = s3c_wksrc_rtc_alarm, + .assume_timer_stops_in_suspend = false, +}; + +struct platform_device midas_charger_manager = { + .name = "charger-manager", + .dev = { + .platform_data = &midas_charger_desc, + }, +}; + +#ifdef CONFIG_SENSORS_NTC_THERMISTOR +struct platform_device midas_ncp15wb473_thermistor = { + .name = "ncp15wb473", + .dev = { + .platform_data = &ncp15wb473_pdata, + }, +}; +#endif + +void cm_change_fullbatt_uV(void) +{ + midas_charger_desc.fullbatt_uV = SDI_2100MA_BATT; +} +EXPORT_SYMBOL(cm_change_fullbatt_uV); + |