diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/Kconfig | 51 | ||||
| -rw-r--r-- | drivers/power/Makefile | 22 | ||||
| -rw-r--r-- | drivers/power/apm_power.c | 243 | ||||
| -rw-r--r-- | drivers/power/ds2760_battery.c | 470 | ||||
| -rw-r--r-- | drivers/power/olpc_battery.c | 352 | ||||
| -rw-r--r-- | drivers/power/pda_power.c | 261 | ||||
| -rw-r--r-- | drivers/power/pmu_battery.c | 215 | ||||
| -rw-r--r-- | drivers/power/power_supply.h | 42 | ||||
| -rw-r--r-- | drivers/power/power_supply_core.c | 168 | ||||
| -rw-r--r-- | drivers/power/power_supply_leds.c | 176 | ||||
| -rw-r--r-- | drivers/power/power_supply_sysfs.c | 299 | ||||
| -rw-r--r-- | drivers/w1/slaves/Kconfig | 13 | ||||
| -rw-r--r-- | drivers/w1/slaves/Makefile | 1 | ||||
| -rw-r--r-- | drivers/w1/slaves/w1_ds2760.c | 213 | ||||
| -rw-r--r-- | drivers/w1/slaves/w1_ds2760.h | 50 | ||||
| -rw-r--r-- | drivers/w1/w1_family.h | 1 |
18 files changed, 2580 insertions, 0 deletions
diff --git a/drivers/Kconfig b/drivers/Kconfig index 4e6487d461f..7916f4b86d2 100644 --- a/drivers/Kconfig +++ b/drivers/Kconfig @@ -52,6 +52,8 @@ source "drivers/spi/Kconfig" source "drivers/w1/Kconfig" +source "drivers/power/Kconfig" + source "drivers/hwmon/Kconfig" source "drivers/mfd/Kconfig" diff --git a/drivers/Makefile b/drivers/Makefile index adad2f3d438..503d8256944 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -61,6 +61,7 @@ obj-$(CONFIG_I2O) += message/ obj-$(CONFIG_RTC_LIB) += rtc/ obj-y += i2c/ obj-$(CONFIG_W1) += w1/ +obj-$(CONFIG_POWER_SUPPLY) += power/ obj-$(CONFIG_HWMON) += hwmon/ obj-$(CONFIG_PHONE) += telephony/ obj-$(CONFIG_MD) += md/ diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig new file mode 100644 index 00000000000..ab9c3e5a7c1 --- /dev/null +++ b/drivers/power/Kconfig @@ -0,0 +1,51 @@ +menuconfig POWER_SUPPLY + tristate "Power supply class support" + help + Say Y here to enable power supply class support. This allows + power supply (batteries, AC, USB) monitoring by userspace + via sysfs and uevent (if available) and/or APM kernel interface + (if selected below). + +if POWER_SUPPLY + +config POWER_SUPPLY_DEBUG + bool "Power supply debug" + help + Say Y here to enable debugging messages for power supply class + and drivers. + +config PDA_POWER + tristate "Generic PDA/phone power driver" + help + Say Y here to enable generic power driver for PDAs and phones with + one or two external power supplies (AC/USB) connected to main and + backup batteries, and optional builtin charger. + +config APM_POWER + tristate "APM emulation for class batteries" + depends on APM_EMULATION + help + Say Y here to enable support APM status emulation using + battery class devices. + +config BATTERY_DS2760 + tristate "DS2760 battery driver (HP iPAQ & others)" + select W1 + select W1_SLAVE_DS2760 + help + Say Y here to enable support for batteries with ds2760 chip. + +config BATTERY_PMU + tristate "Apple PMU battery" + depends on ADB_PMU + help + Say Y here to expose battery information on Apple machines + through the generic battery class. + +config BATTERY_OLPC + tristate "One Laptop Per Child battery" + depends on X86_32 && OLPC + help + Say Y to enable support for the battery on the OLPC laptop. + +endif # POWER_SUPPLY diff --git a/drivers/power/Makefile b/drivers/power/Makefile new file mode 100644 index 00000000000..6413ded5fe5 --- /dev/null +++ b/drivers/power/Makefile @@ -0,0 +1,22 @@ +power_supply-objs := power_supply_core.o + +ifeq ($(CONFIG_SYSFS),y) +power_supply-objs += power_supply_sysfs.o +endif + +ifeq ($(CONFIG_LEDS_TRIGGERS),y) +power_supply-objs += power_supply_leds.o +endif + +ifeq ($(CONFIG_POWER_SUPPLY_DEBUG),y) +EXTRA_CFLAGS += -DDEBUG +endif + +obj-$(CONFIG_POWER_SUPPLY) += power_supply.o + +obj-$(CONFIG_PDA_POWER) += pda_power.o +obj-$(CONFIG_APM_POWER) += apm_power.o + +obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o +obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o +obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o diff --git a/drivers/power/apm_power.c b/drivers/power/apm_power.c new file mode 100644 index 00000000000..042bd950d03 --- /dev/null +++ b/drivers/power/apm_power.c @@ -0,0 +1,243 @@ +/* + * Copyright © 2007 Anton Vorontsov <cbou@mail.ru> + * Copyright © 2007 Eugeny Boger <eugenyboger@dgap.mipt.ru> + * + * Author: Eugeny Boger <eugenyboger@dgap.mipt.ru> + * + * Use consistent with the GNU GPL is permitted, + * provided that this copyright notice is + * preserved in its entirety in all copies and derived works. + */ + +#include <linux/module.h> +#include <linux/power_supply.h> +#include <linux/apm-emulation.h> + +#define PSY_PROP(psy, prop, val) psy->get_property(psy, \ + POWER_SUPPLY_PROP_##prop, val) + +#define _MPSY_PROP(prop, val) main_battery->get_property(main_battery, \ + prop, val) + +#define MPSY_PROP(prop, val) _MPSY_PROP(POWER_SUPPLY_PROP_##prop, val) + +static struct power_supply *main_battery; + +static void find_main_battery(void) +{ + struct device *dev; + struct power_supply *bat, *batm; + union power_supply_propval full; + int max_charge = 0; + + main_battery = NULL; + batm = NULL; + list_for_each_entry(dev, &power_supply_class->devices, node) { + bat = dev_get_drvdata(dev); + /* If none of battery devices cantains 'use_for_apm' flag, + choice one with maximum design charge */ + if (!PSY_PROP(bat, CHARGE_FULL_DESIGN, &full)) { + if (full.intval > max_charge) { + batm = bat; + max_charge = full.intval; + } + } + + if (bat->use_for_apm) + main_battery = bat; + } + if (!main_battery) + main_battery = batm; + + return; +} + +static int calculate_time(int status) +{ + union power_supply_propval charge_full, charge_empty; + union power_supply_propval charge, I; + + if (MPSY_PROP(CHARGE_FULL, &charge_full)) { + /* if battery can't report this property, use design value */ + if (MPSY_PROP(CHARGE_FULL_DESIGN, &charge_full)) + return -1; + } + + if (MPSY_PROP(CHARGE_EMPTY, &charge_empty)) { + /* if battery can't report this property, use design value */ + if (MPSY_PROP(CHARGE_EMPTY_DESIGN, &charge_empty)) + charge_empty.intval = 0; + } + + if (MPSY_PROP(CHARGE_AVG, &charge)) { + /* if battery can't report average value, use momentary */ + if (MPSY_PROP(CHARGE_NOW, &charge)) + return -1; + } + + if (MPSY_PROP(CURRENT_AVG, &I)) { + /* if battery can't report average value, use momentary */ + if (MPSY_PROP(CURRENT_NOW, &I)) + return -1; + } + + if (status == POWER_SUPPLY_STATUS_CHARGING) + return ((charge.intval - charge_full.intval) * 60L) / + I.intval; + else + return -((charge.intval - charge_empty.intval) * 60L) / + I.intval; +} + +static int calculate_capacity(int using_charge) +{ + enum power_supply_property full_prop, empty_prop; + enum power_supply_property full_design_prop, empty_design_prop; + enum power_supply_property now_prop, avg_prop; + union power_supply_propval empty, full, cur; + int ret; + + if (using_charge) { + full_prop = POWER_SUPPLY_PROP_CHARGE_FULL; + empty_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY; + full_design_prop = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN; + empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN; + now_prop = POWER_SUPPLY_PROP_CHARGE_NOW; + avg_prop = POWER_SUPPLY_PROP_CHARGE_AVG; + } else { + full_prop = POWER_SUPPLY_PROP_ENERGY_FULL; + empty_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY; + full_design_prop = POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN; + empty_design_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN; + now_prop = POWER_SUPPLY_PROP_ENERGY_NOW; + avg_prop = POWER_SUPPLY_PROP_ENERGY_AVG; + } + + if (_MPSY_PROP(full_prop, &full)) { + /* if battery can't report this property, use design value */ + if (_MPSY_PROP(full_design_prop, &full)) + return -1; + } + + if (_MPSY_PROP(avg_prop, &cur)) { + /* if battery can't report average value, use momentary */ + if (_MPSY_PROP(now_prop, &cur)) + return -1; + } + + if (_MPSY_PROP(empty_prop, &empty)) { + /* if battery can't report this property, use design value */ + if (_MPSY_PROP(empty_design_prop, &empty)) + empty.intval = 0; + } + + if (full.intval - empty.intval) + ret = ((cur.intval - empty.intval) * 100L) / + (full.intval - empty.intval); + else + return -1; + + if (ret > 100) + return 100; + else if (ret < 0) + return 0; + + return ret; +} + +static void apm_battery_apm_get_power_status(struct apm_power_info *info) +{ + union power_supply_propval status; + union power_supply_propval capacity, time_to_full, time_to_empty; + + down(&power_supply_class->sem); + find_main_battery(); + if (!main_battery) { + up(&power_supply_class->sem); + return; + } + + /* status */ + + if (MPSY_PROP(STATUS, &status)) + status.intval = POWER_SUPPLY_STATUS_UNKNOWN; + + /* ac line status */ + + if ((status.intval == POWER_SUPPLY_STATUS_CHARGING) || + (status.intval == POWER_SUPPLY_STATUS_NOT_CHARGING) || + (status.intval == POWER_SUPPLY_STATUS_FULL)) + info->ac_line_status = APM_AC_ONLINE; + else + info->ac_line_status = APM_AC_OFFLINE; + + /* battery life (i.e. capacity, in percents) */ + + if (MPSY_PROP(CAPACITY, &capacity) == 0) { + info->battery_life = capacity.intval; + } else { + /* try calculate using energy */ + info->battery_life = calculate_capacity(0); + /* if failed try calculate using charge instead */ + if (info->battery_life == -1) + info->battery_life = calculate_capacity(1); + } + + /* charging status */ + + if (status.intval == POWER_SUPPLY_STATUS_CHARGING) { + info->battery_status = APM_BATTERY_STATUS_CHARGING; + } else { + if (info->battery_life > 50) + info->battery_status = APM_BATTERY_STATUS_HIGH; + else if (info->battery_life > 5) + info->battery_status = APM_BATTERY_STATUS_LOW; + else + info->battery_status = APM_BATTERY_STATUS_CRITICAL; + } + info->battery_flag = info->battery_status; + + /* time */ + + info->units = APM_UNITS_MINS; + + if (status.intval == POWER_SUPPLY_STATUS_CHARGING) { + if (MPSY_PROP(TIME_TO_FULL_AVG, &time_to_full)) { + if (MPSY_PROP(TIME_TO_FULL_NOW, &time_to_full)) + info->time = calculate_time(status.intval); + else + info->time = time_to_full.intval / 60; + } + } else { + if (MPSY_PROP(TIME_TO_EMPTY_AVG, &time_to_empty)) { + if (MPSY_PROP(TIME_TO_EMPTY_NOW, &time_to_empty)) + info->time = calculate_time(status.intval); + else + info->time = time_to_empty.intval / 60; + } + } + + up(&power_supply_class->sem); + return; +} + +static int __init apm_battery_init(void) +{ + printk(KERN_INFO "APM Battery Driver\n"); + + apm_get_power_status = apm_battery_apm_get_power_status; + return 0; +} + +static void __exit apm_battery_exit(void) +{ + apm_get_power_status = NULL; + return; +} + +module_init(apm_battery_init); +module_exit(apm_battery_exit); + +MODULE_AUTHOR("Eugeny Boger <eugenyboger@dgap.mipt.ru>"); +MODULE_DESCRIPTION("APM emulation driver for battery monitoring class"); +MODULE_LICENSE("GPL"); diff --git a/drivers/power/ds2760_battery.c b/drivers/power/ds2760_battery.c new file mode 100644 index 00000000000..00e1ea6f1de --- /dev/null +++ b/drivers/power/ds2760_battery.c @@ -0,0 +1,470 @@ +/* + * Driver for batteries with DS2760 chips inside. + * + * Copyright © 2007 Anton Vorontsov + * 2004-2007 Matt Reimer + * 2004 Szabolcs Gyurko + * + * Use consistent with the GNU GPL is permitted, + * provided that this copyright notice is + * preserved in its entirety in all copies and derived works. + * + * Author: Anton Vorontsov <cbou@mail.ru> + * February 2007 + * + * Matt Reimer <mreimer@vpop.net> + * April 2004, 2005, 2007 + * + * Szabolcs Gyurko <szabolcs.gyurko@tlt.hu> + * September 2004 + */ + +#include <linux/module.h> +#include <linux/param.h> +#include <linux/jiffies.h> +#include <linux/workqueue.h> +#include <linux/pm.h> +#include <linux/platform_device.h> +#include <linux/power_supply.h> + +#include "../w1/w1.h" +#include "../w1/slaves/w1_ds2760.h" + +struct ds2760_device_info { + struct device *dev; + + /* DS2760 data, valid after calling ds2760_battery_read_status() */ + unsigned long update_time; /* jiffies when data read */ + char raw[DS2760_DATA_SIZE]; /* raw DS2760 data */ + int voltage_raw; /* units of 4.88 mV */ + int voltage_uV; /* units of µV */ + int current_raw; /* units of 0.625 mA */ + int current_uA; /* units of µA */ + int accum_current_raw; /* units of 0.25 mAh */ + int accum_current_uAh; /* units of µAh */ + int temp_raw; /* units of 0.125 °C */ + int temp_C; /* units of 0.1 °C */ + int rated_capacity; /* units of µAh */ + int rem_capacity; /* percentage */ + int full_active_uAh; /* units of µAh */ + int empty_uAh; /* units of µAh */ + int life_sec; /* units of seconds */ + int charge_status; /* POWER_SUPPLY_STATUS_* */ + + int full_counter; + struct power_supply bat; + struct device *w1_dev; + struct workqueue_struct *monitor_wqueue; + struct delayed_work monitor_work; +}; + +static unsigned int cache_time = 1000; +module_param(cache_time, uint, 0644); +MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); + +/* Some batteries have their rated capacity stored a N * 10 mAh, while + * others use an index into this table. */ +static int rated_capacities[] = { + 0, + 920, /* Samsung */ + 920, /* BYD */ + 920, /* Lishen */ + 920, /* NEC */ + 1440, /* Samsung */ + 1440, /* BYD */ + 1440, /* Lishen */ + 1440, /* NEC */ + 2880, /* Samsung */ + 2880, /* BYD */ + 2880, /* Lishen */ + 2880 /* NEC */ +}; + +/* array is level at temps 0°C, 10°C, 20°C, 30°C, 40°C + * temp is in Celsius */ +static int battery_interpolate(int array[], int temp) +{ + int index, dt; + + if (temp <= 0) + return array[0]; + if (temp >= 40) + return array[4]; + + index = temp / 10; + dt = temp % 10; + + return array[index] + (((array[index + 1] - array[index]) * dt) / 10); +} + +static int ds2760_battery_read_status(struct ds2760_device_info *di) +{ + int ret, i, start, count, scale[5]; + + if (di->update_time && time_before(jiffies, di->update_time + + msecs_to_jiffies(cache_time))) + return 0; + + /* The first time we read the entire contents of SRAM/EEPROM, + * but after that we just read the interesting bits that change. */ + if (di->update_time == 0) { + start = 0; + count = DS2760_DATA_SIZE; + } else { + start = DS2760_VOLTAGE_MSB; + count = DS2760_TEMP_LSB - start + 1; + } + + ret = w1_ds2760_read(di->w1_dev, di->raw + start, start, count); + if (ret != count) { + dev_warn(di->dev, "call to w1_ds2760_read failed (0x%p)\n", + di->w1_dev); + return 1; + } + + di->update_time = jiffies; + + /* DS2760 reports voltage in units of 4.88mV, but the battery class + * reports in units of uV, so convert by multiplying by 4880. */ + di->voltage_raw = (di->raw[DS2760_VOLTAGE_MSB] << 3) | + (di->raw[DS2760_VOLTAGE_LSB] >> 5); + di->voltage_uV = di->voltage_raw * 4880; + + /* DS2760 reports current in signed units of 0.625mA, but the battery + * class reports in units of µA, so convert by multiplying by 625. */ + di->current_raw = + (((signed char)di->raw[DS2760_CURRENT_MSB]) << 5) | + (di->raw[DS2760_CURRENT_LSB] >> 3); + di->current_uA = di->current_raw * 625; + + /* DS2760 reports accumulated current in signed units of 0.25mAh. */ + di->accum_current_raw = + (((signed char)di->raw[DS2760_CURRENT_ACCUM_MSB]) << 8) | + di->raw[DS2760_CURRENT_ACCUM_LSB]; + di->accum_current_uAh = di->accum_current_raw * 250; + + /* DS2760 reports temperature in signed units of 0.125°C, but the + * battery class reports in units of 1/10 °C, so we convert by + * multiplying by .125 * 10 = 1.25. */ + di->temp_raw = (((signed char)di->raw[DS2760_TEMP_MSB]) << 3) | + (di->raw[DS2760_TEMP_LSB] >> 5); + di->temp_C = di->temp_raw + (di->temp_raw / 4); + + /* At least some battery monitors (e.g. HP iPAQ) store the battery's + * maximum rated capacity. */ + if (di->raw[DS2760_RATED_CAPACITY] < ARRAY_SIZE(rated_capacities)) + di->rated_capacity = rated_capacities[ + (unsigned int)di->raw[DS2760_RATED_CAPACITY]]; + else + di->rated_capacity = di->raw[DS2760_RATED_CAPACITY] * 10; + + di->rated_capacity *= 1000; /* convert to µAh */ + + /* Calculate the full level at the present temperature. */ + di->full_active_uAh = di->raw[DS2760_ACTIVE_FULL] << 8 | + di->raw[DS2760_ACTIVE_FULL + 1]; + + scale[0] = di->raw[DS2760_ACTIVE_FULL] << 8 | + di->raw[DS2760_ACTIVE_FULL + 1]; + for (i = 1; i < 5; i++) + scale[i] = scale[i - 1] + di->raw[DS2760_ACTIVE_FULL + 2 + i]; + + di->full_active_uAh = battery_interpolate(scale, di->temp_C / 10); + di->full_active_uAh *= 1000; /* convert to µAh */ + + /* Calculate the empty level at the present temperature. */ + scale[4] = di->raw[DS2760_ACTIVE_EMPTY + 4]; + for (i = 3; i >= 0; i--) + scale[i] = scale[i + 1] + di->raw[DS2760_ACTIVE_EMPTY + i]; + + di->empty_uAh = battery_interpolate(scale, di->temp_C / 10); + di->empty_uAh *= 1000; /* convert to µAh */ + + /* From Maxim Application Note 131: remaining capacity = + * ((ICA - Empty Value) / (Full Value - Empty Value)) x 100% */ + di->rem_capacity = ((di->accum_current_uAh - di->empty_uAh) * 100L) / + (di->full_active_uAh - di->empty_uAh); + + if (di->rem_capacity < 0) + di->rem_capacity = 0; + if (di->rem_capacity > 100) + di->rem_capacity = 100; + + if (di->current_uA) + di->life_sec = -((di->accum_current_uAh - di->empty_uAh) * + 3600L) / di->current_uA; + else + di->life_sec = 0; + + return 0; +} + +static void ds2760_battery_update_status(struct ds2760_device_info *di) +{ + int old_charge_status = di->charge_status; + + ds2760_battery_read_status(di); + + if (di->charge_status == POWER_SUPPLY_STATUS_UNKNOWN) + di->full_counter = 0; + + if (power_supply_am_i_supplied(&di->bat)) { + if (di->current_uA > 10000) { + di->charge_status = POWER_SUPPLY_STATUS_CHARGING; + di->full_counter = 0; + } else if (di->current_uA < -5000) { + if (di->charge_status != POWER_SUPPLY_STATUS_NOT_CHARGING) + dev_notice(di->dev, "not enough power to " + "charge\n"); + di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING; + di->full_counter = 0; + } else if (di->current_uA < 10000 && + di->charge_status != POWER_SUPPLY_STATUS_FULL) { + + /* Don't consider the battery to be full unless + * we've seen the current < 10 mA at least two + * consecutive times. */ + + di->full_counter++; + + if (di->full_counter < 2) { + di->charge_status = POWER_SUPPLY_STATUS_CHARGING; + } else { + unsigned char acr[2]; + int acr_val; + + /* acr is in units of 0.25 mAh */ + acr_val = di->full_active_uAh * 4L / 1000; + + acr[0] = acr_val >> 8; + acr[1] = acr_val & 0xff; + + if (w1_ds2760_write(di->w1_dev, acr, + DS2760_CURRENT_ACCUM_MSB, 2) < 2) + dev_warn(di->dev, + "ACR reset failed\n"); + + di->charge_status = POWER_SUPPLY_STATUS_FULL; + } + } + } else { + di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING; + di->full_counter = 0; + } + + if (di->charge_status != old_charge_status) + power_supply_changed(&di->bat); + + return; +} + +static void ds2760_battery_work(struct work_struct *work) +{ + struct ds2760_device_info *di = container_of(work, + struct ds2760_device_info, monitor_work.work); + const int interval = HZ * 60; + + dev_dbg(di->dev, "%s\n", __FUNCTION__); + + ds2760_battery_update_status(di); + queue_delayed_work(di->monitor_wqueue, &di->monitor_work, interval); + + return; +} + +#define to_ds2760_device_info(x) container_of((x), struct ds2760_device_info, \ + bat); + +static void ds2760_battery_external_power_changed(struct power_supply *psy) +{ + struct ds2760_device_info *di = to_ds2760_device_info(psy); + + dev_dbg(di->dev, "%s\n", __FUNCTION__); + + cancel_delayed_work(&di->monitor_work); + queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ/10); + + return; +} + +static int ds2760_battery_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct ds2760_device_info *di = to_ds2760_device_info(psy); + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + val->intval = di->charge_status; + return 0; + default: + break; + } + + ds2760_battery_read_status(di); + + switch (psp) { + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + val->intval = di->voltage_uV; + break; + case POWER_SUPPLY_PROP_CURRENT_NOW: + val->intval = di->current_uA; + break; + case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: + val->intval = di->rated_capacity; + break; + case POWER_SUPPLY_PROP_CHARGE_FULL: + val->intval = di->full_active_uAh; + break; + case POWER_SUPPLY_PROP_CHARGE_EMPTY: + val->intval = di->empty_uAh; + break; + case POWER_SUPPLY_PROP_CHARGE_NOW: + val->intval = di->accum_current_uAh; + break; + case POWER_SUPPLY_PROP_TEMP: + val->intval = di->temp_C; + break; + default: + return -EINVAL; + } + + return 0; +} + +static enum power_supply_property ds2760_battery_props[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, + POWER_SUPPLY_PROP_CHARGE_FULL, + POWER_SUPPLY_PROP_CHARGE_EMPTY, + POWER_SUPPLY_PROP_CHARGE_NOW, + POWER_SUPPLY_PROP_TEMP, +}; + +static int ds2760_battery_probe(struct platform_device *pdev) +{ + int retval = 0; + struct ds2760_device_info *di; + struct ds2760_platform_data *pdata; + + di = kzalloc(sizeof(*di), GFP_KERNEL); + if (!di) { + retval = -ENOMEM; + goto di_alloc_failed; + } + + platform_set_drvdata(pdev, di); + + pdata = pdev->dev.platform_data; + di->dev = &pdev->dev; + di->w1_dev = pdev->dev.parent; + di->bat.name = pdev->dev.bus_id; + di->bat.type = POWER_SUPPLY_TYPE_BATTERY; + di->bat.properties = ds2760_battery_props; + di->bat.num_properties = ARRAY_SIZE(ds2760_battery_props); + di->bat.get_property = ds2760_battery_get_property; + di->bat.external_power_changed = + ds2760_battery_external_power_changed; + + di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN; + + retval = power_supply_register(&pdev->dev, &di->bat); + if (retval) { + dev_err(di->dev, "failed to register battery"); + goto batt_failed; + } + + INIT_DELAYED_WORK(&di->monitor_work, ds2760_battery_work); + di->monitor_wqueue = create_singlethread_workqueue(pdev->dev.bus_id); + if (!di->monitor_wqueue) { + retval = -ESRCH; + goto workqueue_failed; + } + queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ * 1); + + goto success; + +workqueue_failed: + power_supply_unregister(&di->bat); +batt_failed: + kfree(di); +di_alloc_failed: +success: + return retval; +} + +static int ds2760_battery_remove(struct platform_device *pdev) +{ + struct ds2760_device_info *di = platform_get_drvdata(pdev); + + cancel_rearming_delayed_workqueue(di->monitor_wqueue, + &di->monitor_work); + destroy_workqueue(di->monitor_wqueue); + power_supply_unregister(&di->bat); + + return 0; +} + +#ifdef CONFIG_PM + +static int ds2760_battery_suspend(struct platform_device *pdev, + pm_message_t state) +{ + struct ds2760_device_info *di = platform_get_drvdata(pdev); + + di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN; + + return 0; +} + +static int ds2760_battery_resume(struct platform_device *pdev) +{ + struct ds2760_device_info *di = platform_get_drvdata(pdev); + + di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN; + power_supply_changed(&di->bat); + + cancel_delayed_work(&di->monitor_work); + queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ); + + return 0; +} + +#else + +#define ds2760_battery_suspend NULL +#define ds2760_battery_resume NULL + +#endif /* CONFIG_PM */ + +static struct platform_driver ds2760_battery_driver = { + .driver = { + .name = "ds2760-battery", + }, + .probe = ds2760_battery_probe, + .remove = ds2760_battery_remove, + .suspend = ds2760_battery_suspend, + .resume = ds2760_battery_resume, +}; + +static int __init ds2760_battery_init(void) +{ + return platform_driver_register(&ds2760_battery_driver); +} + +static void __exit ds2760_battery_exit(void) +{ + platform_driver_unregister(&ds2760_battery_driver); + return; +} + +module_init(ds2760_battery_init); +module_exit(ds2760_battery_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>, " + "Matt Reimer <mreimer@vpop.net>, " + "Anton Vorontsov <cbou@mail.ru>"); +MODULE_DESCRIPTION("ds2760 battery driver"); diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c new file mode 100644 index 00000000000..878684df766 --- /dev/null +++ b/drivers/power/olpc_battery.c @@ -0,0 +1,352 @@ +/* + * Battery driver for One Laptop Per Child board. + * + * Copyright © 2006 David Woodhouse <dwmw2@infradead.org> + * + * 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/err.h> +#include <linux/platform_device.h> +#include <linux/power_supply.h> +#include <linux/jiffies.h> +#include <linux/sched.h> +#include <asm/olpc.h> + + +#define EC_BAT_VOLTAGE 0x10 /* uint16_t, *9.76/32, mV */ +#define EC_BAT_CURRENT 0x11 /* int16_t, *15.625/120, mA */ +#define EC_BAT_ACR 0x12 +#define EC_BAT_TEMP 0x13 /* uint16_t, *100/256, °C */ +#define EC_AMB_TEMP 0x14 /* uint16_t, *100/256, °C */ +#define EC_BAT_STATUS 0x15 /* uint8_t, bitmask */ +#define EC_BAT_SOC 0x16 /* uint8_t, percentage */ +#define EC_BAT_SERIAL 0x17 /* uint8_t[6] */ +#define EC_BAT_EEPROM 0x18 /* uint8_t adr as input, uint8_t output */ +#define EC_BAT_ERRCODE 0x1f /* uint8_t, bitmask */ + +#define BAT_STAT_PRESENT 0x01 +#define BAT_STAT_FULL 0x02 +#define BAT_STAT_LOW 0x04 +#define BAT_STAT_DESTROY 0x08 +#define BAT_STAT_AC 0x10 +#define BAT_STAT_CHARGING 0x20 +#define BAT_STAT_DISCHARGING 0x40 + +#define BAT_ERR_INFOFAIL 0x02 +#define BAT_ERR_OVERVOLTAGE 0x04 +#define BAT_ERR_OVERTEMP 0x05 +#define BAT_ERR_GAUGESTOP 0x06 +#define BAT_ERR_OUT_OF_CONTROL 0x07 +#define BAT_ERR_ID_FAIL 0x09 +#define BAT_ERR_ACR_FAIL 0x10 + +#define BAT_ADDR_MFR_TYPE 0x5F + +/********************************************************************* + * Power + *********************************************************************/ + +static int olpc_ac_get_prop(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + int ret = 0; + uint8_t status; + + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1); + if (ret) + return ret; + + val->intval = !!(status & BAT_STAT_AC); + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static enum power_supply_property olpc_ac_props[] = { + POWER_SUPPLY_PROP_ONLINE, +}; + +static struct power_supply olpc_ac = { + .name = "olpc-ac", + .type = POWER_SUPPLY_TYPE_MAINS, + .properties = olpc_ac_props, + .num_properties = ARRAY_SIZE(olpc_ac_props), + .get_property = olpc_ac_get_prop, +}; + +/********************************************************************* + * Battery properties + *********************************************************************/ +static int olpc_bat_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + int ret = 0; + int16_t ec_word; + uint8_t ec_byte; + + ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &ec_byte, 1); + if (ret) + return ret; + + /* Theoretically there's a race here -- the battery could be + removed immediately after we check whether it's present, and + then we query for some other property of the now-absent battery. + It doesn't matter though -- the EC will return the last-known + information, and it's as if we just ran that _little_ bit faster + and managed to read it out before the battery went away. */ + if (!(ec_byte & BAT_STAT_PRESENT) && psp != POWER_SUPPLY_PROP_PRESENT) + return -ENODEV; + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + if (olpc_platform_info.ecver > 0x44) { + if (ec_byte & BAT_STAT_CHARGING) + val->intval = POWER_SUPPLY_STATUS_CHARGING; + else if (ec_byte & BAT_STAT_DISCHARGING) + val->intval = POWER_SUPPLY_STATUS_DISCHARGING; + else if (ec_byte & BAT_STAT_FULL) + val->intval = POWER_SUPPLY_STATUS_FULL; + else /* er,... */ + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; + } else { + /* Older EC didn't report charge/discharge bits */ + if (!(ec_byte & BAT_STAT_AC)) /* No AC means discharging */ + val->intval = POWER_SUPPLY_STATUS_DISCHARGING; + else if (ec_byte & BAT_STAT_FULL) + val->intval = POWER_SUPPLY_STATUS_FULL; + else /* Not _necessarily_ true but EC doesn't tell all yet */ + val->intval = POWER_SUPPLY_STATUS_CHARGING; + break; + } + case POWER_SUPPLY_PROP_PRESENT: + val->intval = !!(ec_byte & BAT_STAT_PRESENT); + break; + + case POWER_SUPPLY_PROP_HEALTH: + if (ec_byte & BAT_STAT_DESTROY) + val->intval = POWER_SUPPLY_HEALTH_DEAD; + else { + ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1); + if (ret) + return ret; + + switch (ec_byte) { + case 0: + val->intval = POWER_SUPPLY_HEALTH_GOOD; + break; + + case BAT_ERR_OVERTEMP: + val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; + break; + + case BAT_ERR_OVERVOLTAGE: + val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; + break; + + case BAT_ERR_INFOFAIL: + case BAT_ERR_OUT_OF_CONTROL: + case BAT_ERR_ID_FAIL: + case BAT_ERR_ACR_FAIL: + val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; + break; + + default: + /* Eep. We don't know this failure code */ + return -EIO; + } + } + break; + + case POWER_SUPPLY_PROP_MANUFACTURER: + ec_byte = BAT_ADDR_MFR_TYPE; + ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1); + if (ret) + return ret; + + switch (ec_byte >> 4) { + case 1: + val->strval = "Gold Peak"; + break; + case 2: + val->strval = "BYD"; + break; + default: + val->strval = "Unknown"; + break; + } + break; + case POWER_SUPPLY_PROP_TECHNOLOGY: + ec_byte = BAT_ADDR_MFR_TYPE; + ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1); + if (ret) + return ret; + + switch (ec_byte & 0xf) { + case 1: + val->intval = POWER_SUPPLY_TECHNOLOGY_NiMH; + break; + case 2: + val->intval = POWER_SUPPLY_TECHNOLOGY_LiFe; + break; + default: + val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN; + break; + } + break; + case POWER_SUPPLY_PROP_VOLTAGE_AVG: + ret = olpc_ec_cmd(EC_BAT_VOLTAGE, NULL, 0, (void *)&ec_word, 2); + if (ret) + return ret; + + ec_word = be16_to_cpu(ec_word); + val->intval = ec_word * 9760L / 32; + break; + case POWER_SUPPLY_PROP_CURRENT_AVG: + ret = olpc_ec_cmd(EC_BAT_CURRENT, NULL, 0, (void *)&ec_word, 2); + if (ret) + return ret; + + ec_word = be16_to_cpu(ec_word); + val->intval = ec_word * 15625L / 120; + break; + case POWER_SUPPLY_PROP_CAPACITY: + ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &ec_byte, 1); + if (ret) + return ret; + val->intval = ec_byte; + break; + case POWER_SUPPLY_PROP_CAPACITY_LEVEL: + if (ec_byte & BAT_STAT_FULL) + val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL; + else if (ec_byte & BAT_STAT_LOW) + val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW; + else + val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; + break; + case POWER_SUPPLY_PROP_TEMP: + ret = olpc_ec_cmd(EC_BAT_TEMP, NULL, 0, (void *)&ec_word, 2); + if (ret) + return ret; + ec_word = be16_to_cpu(ec_word); + val->intval = ec_word * 100 / 256; + break; + case POWER_SUPPLY_PROP_TEMP_AMBIENT: + ret = olpc_ec_cmd(EC_AMB_TEMP, NULL, 0, (void *)&ec_word, 2); + if (ret) + return ret; + + ec_word = be16_to_cpu(ec_word); + val->intval = ec_word * 100 / 256; + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static enum power_supply_property olpc_bat_props[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_TECHNOLOGY, + POWER_SUPPLY_PROP_VOLTAGE_AVG, + POWER_SUPPLY_PROP_CURRENT_AVG, + POWER_SUPPLY_PROP_CAPACITY, + POWER_SUPPLY_PROP_CAPACITY_LEVEL, + POWER_SUPPLY_PROP_TEMP, + POWER_SUPPLY_PROP_TEMP_AMBIENT, + POWER_SUPPLY_PROP_MANUFACTURER, +}; + +/********************************************************************* + * Initialisation + *********************************************************************/ + +static struct platform_device *bat_pdev; + +static struct power_supply olpc_bat = { + .properties = olpc_bat_props, + .num_properties = ARRAY_SIZE(olpc_bat_props), + .get_property = olpc_bat_get_property, + .use_for_apm = 1, +}; + +void olpc_battery_trigger_uevent(unsigned long cause) +{ + if (cause & EC_SCI_SRC_ACPWR) + kobject_uevent(&olpc_ac.dev->kobj, KOBJ_CHANGE); + if (cause & (EC_SCI_SRC_BATERR|EC_SCI_SRC_BATSOC|EC_SCI_SRC_BATTERY)) + kobject_uevent(&olpc_bat.dev->kobj, KOBJ_CHANGE); +} + +static int __init olpc_bat_init(void) +{ + int ret = 0; + uint8_t status; + + if (!olpc_platform_info.ecver) + return -ENXIO; + if (olpc_platform_info.ecver < 0x43) { + printk(KERN_NOTICE "OLPC EC version 0x%02x too old for battery driver.\n", olpc_platform_info.ecver); + return -ENXIO; + } + + ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1); + if (ret) + return ret; + + /* Ignore the status. It doesn't actually matter */ + + bat_pdev = platform_device_register_simple("olpc-battery", 0, NULL, 0); + if (IS_ERR(bat_pdev)) + return PTR_ERR(bat_pdev); + + ret = power_supply_register(&bat_pdev->dev, &olpc_ac); + if (ret) + goto ac_failed; + + olpc_bat.name = bat_pdev->name; + + ret = power_supply_register(&bat_pdev->dev, &olpc_bat); + if (ret) + goto battery_failed; + + olpc_register_battery_callback(&olpc_battery_trigger_uevent); + goto success; + +battery_failed: + power_supply_unregister(&olpc_ac); +ac_failed: + platform_device_unregister(bat_pdev); +success: + return ret; +} + +static void __exit olpc_bat_exit(void) +{ + olpc_deregister_battery_callback(); + power_supply_unregister(&olpc_bat); + power_supply_unregister(&olpc_ac); + platform_device_unregister(bat_pdev); + return; +} + +module_init(olpc_bat_init); +module_exit(olpc_bat_exit); + +MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Battery driver for One Laptop Per Child 'XO' machine"); diff --git a/drivers/power/pda_power.c b/drivers/power/pda_power.c new file mode 100644 index 00000000000..4e1eb040e14 --- /dev/null +++ b/drivers/power/pda_power.c @@ -0,0 +1,261 @@ +/* + * Common power driver for PDAs and phones with one or two external + * power supplies (AC/USB) connected to main and backup batteries, + * and optional builtin charger. + * + * Copyright © 2007 Anton Vorontsov <cbou@mail.ru> + * + * 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/platform_device.h> +#include <linux/interrupt.h> +#include <linux/power_supply.h> +#include <linux/pda_power.h> +#include <linux/timer.h> +#include <linux/jiffies.h> + +static inline unsigned int get_irq_flags(struct resource *res) +{ + unsigned int flags = IRQF_DISABLED | IRQF_SHARED; + + flags |= res->flags & IRQF_TRIGGER_MASK; + + return flags; +} + +static struct device *dev; +static struct pda_power_pdata *pdata; +static struct resource *ac_irq, *usb_irq; +static struct timer_list charger_timer; +static struct timer_list supply_timer; + +static int pda_power_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + if (psy->type == POWER_SUPPLY_TYPE_MAINS) + val->intval = pdata->is_ac_online ? + pdata->is_ac_online() : 0; + else + val->intval = pdata->is_usb_online ? + pdata->is_usb_online() : 0; + break; + default: + return -EINVAL; + } + return 0; +} + +static enum power_supply_property pda_power_props[] = { + POWER_SUPPLY_PROP_ONLINE, +}; + +static char *pda_power_supplied_to[] = { + "main-battery", + "backup-battery", +}; + +static struct power_supply pda_power_supplies[] = { + { + .name = "ac", + .type = POWER_SUPPLY_TYPE_MAINS, + .supplied_to = pda_power_supplied_to, + .num_supplicants = ARRAY_SIZE(pda_power_supplied_to), + .properties = pda_power_props, + .num_properties = ARRAY_SIZE(pda_power_props), + .get_property = pda_power_get_property, + }, + { + .name = "usb", + .type = POWER_SUPPLY_TYPE_USB, + .supplied_to = pda_power_supplied_to, + .num_supplicants = ARRAY_SIZE(pda_power_supplied_to), + .properties = pda_power_props, + .num_properties = ARRAY_SIZE(pda_power_props), + .get_property = pda_power_get_property, + }, +}; + +static void update_charger(void) +{ + if (!pdata->set_charge) + return; + + if (pdata->is_ac_online && pdata->is_ac_online()) { + dev_dbg(dev, "charger on (AC)\n"); + pdata->set_charge(PDA_POWER_CHARGE_AC); + } else if (pdata->is_usb_online && pdata->is_usb_online()) { + dev_dbg(dev, "charger on (USB)\n"); + pdata->set_charge(PDA_POWER_CHARGE_USB); + } else { + dev_dbg(dev, "charger off\n"); + pdata->set_charge(0); + } + + return; +} + +static void supply_timer_func(unsigned long irq) +{ + if (ac_irq && irq == ac_irq->start) + power_supply_changed(&pda_power_supplies[0]); + else if (usb_irq && irq == usb_irq->start) + power_supply_changed(&pda_power_supplies[1]); + return; +} + +static void charger_timer_func(unsigned long irq) +{ + update_charger(); + + /* Okay, charger set. Now wait a bit before notifying supplicants, + * charge power should stabilize. */ + supply_timer.data = irq; + mod_timer(&supply_timer, + jiffies + msecs_to_jiffies(pdata->wait_for_charger)); + return; +} + +static irqreturn_t power_changed_isr(int irq, void *unused) +{ + /* Wait a bit before reading ac/usb line status and setting charger, + * because ac/usb status readings may lag from irq. */ + charger_timer.data = irq; + mod_timer(&charger_timer, + jiffies + msecs_to_jiffies(pdata->wait_for_status)); + return IRQ_HANDLED; +} + +static int pda_power_probe(struct platform_device *pdev) +{ + int ret = 0; + + dev = &pdev->dev; + + if (pdev->id != -1) { + dev_err(dev, "it's meaningless to register several " + "pda_powers; use id = -1\n"); + ret = -EINVAL; + goto wrongid; + } + + pdata = pdev->dev.platform_data; + + update_charger(); + + if (!pdata->wait_for_status) + pdata->wait_for_status = 500; + + if (!pdata->wait_for_charger) + pdata->wait_for_charger = 500; + + setup_timer(&charger_timer, charger_timer_func, 0); + setup_timer(&supply_timer, supply_timer_func, 0); + + ac_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ac"); + usb_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "usb"); + if (!ac_irq && !usb_irq) { + dev_err(dev, "no ac/usb irq specified\n"); + ret = -ENODEV; + goto noirqs; + } + + if (pdata->supplied_to) { + pda_power_supplies[0].supplied_to = pdata->supplied_to; + pda_power_supplies[1].supplied_to = pdata->supplied_to; + pda_power_supplies[0].num_supplicants = pdata->num_supplicants; + pda_power_supplies[1].num_supplicants = pdata->num_supplicants; + } + + ret = power_supply_register(&pdev->dev, &pda_power_supplies[0]); + if (ret) { + dev_err(dev, "failed to register %s power supply\n", + pda_power_supplies[0].name); + goto supply0_failed; + } + + ret = power_supply_register(&pdev->dev, &pda_power_supplies[1]); + if (ret) { + dev_err(dev, "failed to register %s power supply\n", + pda_power_supplies[1].name); + goto supply1_failed; + } + + if (ac_irq) { + ret = request_irq(ac_irq->start, power_changed_isr, + get_irq_flags(ac_irq), ac_irq->name, + &pda_power_supplies[0]); + if (ret) { + dev_err(dev, "request ac irq failed\n"); + goto ac_irq_failed; + } + } + + if (usb_irq) { + ret = request_irq(usb_irq->start, power_changed_isr, + get_irq_flags(usb_irq), usb_irq->name, + &pda_power_supplies[1]); + if (ret) { + dev_err(dev, "request usb irq failed\n"); + goto usb_irq_failed; + } + } + + goto success; + +usb_irq_failed: + if (ac_irq) + free_irq(ac_irq->start, &pda_power_supplies[0]); +ac_irq_failed: + power_supply_unregister(&pda_power_supplies[1]); +supply1_failed: + power_supply_unregister(&pda_power_supplies[0]); +supply0_failed: +noirqs: +wrongid: +success: + return ret; +} + +static int pda_power_remove(struct platform_device *pdev) +{ + if (usb_irq) + free_irq(usb_irq->start, &pda_power_supplies[1]); + if (ac_irq) + free_irq(ac_irq->start, &pda_power_supplies[0]); + del_timer_sync(&charger_timer); + del_timer_sync(&supply_timer); + power_supply_unregister(&pda_power_supplies[1]); + power_supply_unregister(&pda_power_supplies[0]); + return 0; +} + +static struct platform_driver pda_power_pdrv = { + .driver = { + .name = "pda-power", + }, + .probe = pda_power_probe, + .remove = pda_power_remove, +}; + +static int __init pda_power_init(void) +{ + return platform_driver_register(&pda_power_pdrv); +} + +static void __exit pda_power_exit(void) +{ + platform_driver_unregister(&pda_power_pdrv); + return; +} + +module_init(pda_power_init); +module_exit(pda_power_exit); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Anton Vorontsov <cbou@mail.ru>"); diff --git a/drivers/power/pmu_battery.c b/drivers/power/pmu_battery.c new file mode 100644 index 00000000000..2fea4af0e40 --- /dev/null +++ b/drivers/power/pmu_battery.c @@ -0,0 +1,215 @@ +/* + * Battery class driver for Apple PMU + * + * Copyright © 2006 David Woodhouse <dwmw2@infradead.org> + * + * 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/platform_device.h> +#include <linux/err.h> +#include <linux/power_supply.h> +#include <linux/adb.h> +#include <linux/pmu.h> + +static struct pmu_battery_dev { + struct power_supply bat; + struct pmu_battery_info *pbi; + char name[16]; + int propval; +} *pbats[PMU_MAX_BATTERIES]; + +#define to_pmu_battery_dev(x) container_of(x, struct pmu_battery_dev, bat) + +/********************************************************************* + * Power + *********************************************************************/ + +static int pmu_get_ac_prop(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + val->intval = (!!(pmu_power_flags & PMU_PWR_AC_PRESENT)) || + (pmu_battery_count == 0); + break; + default: + return -EINVAL; + } + + return 0; +} + +static enum power_supply_property pmu_ac_props[] = { + POWER_SUPPLY_PROP_ONLINE, +}; + +static struct power_supply pmu_ac = { + .name = "pmu-ac", + .type = POWER_SUPPLY_TYPE_MAINS, + .properties = pmu_ac_props, + .num_properties = ARRAY_SIZE(pmu_ac_props), + .get_property = pmu_get_ac_prop, +}; + +/********************************************************************* + * Battery properties + *********************************************************************/ + +static char *pmu_batt_types[] = { + "Smart", "Comet", "Hooper", "Unknown" +}; + +static char *pmu_bat_get_model_name(struct pmu_battery_info *pbi) +{ + switch (pbi->flags & PMU_BATT_TYPE_MASK) { + case PMU_BATT_TYPE_SMART: + return pmu_batt_types[0]; + case PMU_BATT_TYPE_COMET: + return pmu_batt_types[1]; + case PMU_BATT_TYPE_HOOPER: + return pmu_batt_types[2]; + default: break; + } + return pmu_batt_types[3]; +} + +static int pmu_bat_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct pmu_battery_dev *pbat = to_pmu_battery_dev(psy); + struct pmu_battery_info *pbi = pbat->pbi; + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + if (pbi->flags & PMU_BATT_CHARGING) + val->intval = POWER_SUPPLY_STATUS_CHARGING; + else + val->intval = POWER_SUPPLY_STATUS_DISCHARGING; + break; + case POWER_SUPPLY_PROP_PRESENT: + val->intval = !!(pbi->flags & PMU_BATT_PRESENT); + break; + case POWER_SUPPLY_PROP_MODEL_NAME: + val->strval = pmu_bat_get_model_name(pbi); + break; + case POWER_SUPPLY_PROP_ENERGY_AVG: + val->intval = pbi->charge * 1000; /* mWh -> µWh */ + break; + case POWER_SUPPLY_PROP_ENERGY_FULL: + val->intval = pbi->max_charge * 1000; /* mWh -> µWh */ + break; + case POWER_SUPPLY_PROP_CURRENT_AVG: + val->intval = pbi->amperage * 1000; /* mA -> µA */ + break; + case POWER_SUPPLY_PROP_VOLTAGE_AVG: + val->intval = pbi->voltage * 1000; /* mV -> µV */ + break; + case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: + val->intval = pbi->time_remaining; + break; + default: + return -EINVAL; + } + + return 0; +} + +static enum power_supply_property pmu_bat_props[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_MODEL_NAME, + POWER_SUPPLY_PROP_ENERGY_AVG, + POWER_SUPPLY_PROP_ENERGY_FULL, + POWER_SUPPLY_PROP_CURRENT_AVG, + POWER_SUPPLY_PROP_VOLTAGE_AVG, + POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, +}; + +/********************************************************************* + * Initialisation + *********************************************************************/ + +static struct platform_device *bat_pdev; + +static int __init pmu_bat_init(void) +{ + int ret; + int i; + + bat_pdev = platform_device_register_simple("pmu-battery", + 0, NULL, 0); + if (IS_ERR(bat_pdev)) { + ret = PTR_ERR(bat_pdev); + goto pdev_register_failed; + } + + ret = power_supply_register(&bat_pdev->dev, &pmu_ac); + if (ret) + goto ac_register_failed; + + for (i = 0; i < pmu_battery_count; i++) { + struct pmu_battery_dev *pbat = kzalloc(sizeof(*pbat), + GFP_KERNEL); + if (!pbat) + break; + + sprintf(pbat->name, "PMU battery %d", i); + pbat->bat.name = pbat->name; + pbat->bat.properties = pmu_bat_props; + pbat->bat.num_properties = ARRAY_SIZE(pmu_bat_props); + pbat->bat.get_property = pmu_bat_get_property; + pbat->pbi = &pmu_batteries[i]; + + ret = power_supply_register(&bat_pdev->dev, &pbat->bat); + if (ret) { + kfree(pbat); + goto battery_register_failed; + } + pbats[i] = pbat; + } + + goto success; + +battery_register_failed: + while (i--) { + if (!pbats[i]) + continue; + power_supply_unregister(&pbats[i]->bat); + kfree(pbats[i]); + } + power_supply_unregister(&pmu_ac); +ac_register_failed: + platform_device_unregister(bat_pdev); +pdev_register_failed: +success: + return ret; +} + +static void __exit pmu_bat_exit(void) +{ + int i; + + for (i = 0; i < PMU_MAX_BATTERIES; i++) { + if (!pbats[i]) + continue; + power_supply_unregister(&pbats[i]->bat); + kfree(pbats[i]); + } + power_supply_unregister(&pmu_ac); + platform_device_unregister(bat_pdev); + + return; +} + +module_init(pmu_bat_init); +module_exit(pmu_bat_exit); + +MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("PMU battery driver"); diff --git a/drivers/power/power_supply.h b/drivers/power/power_supply.h new file mode 100644 index 00000000000..a9880d468ee --- /dev/null +++ b/drivers/power/power_supply.h @@ -0,0 +1,42 @@ +/* + * Functions private to power supply class + * + * Copyright © 2007 Anton Vorontsov <cbou@mail.ru> + * Copyright © 2004 Szabolcs Gyurko + * Copyright © 2003 Ian Molton <spyro@f2s.com> + * + * Modified: 2004, Oct Szabolcs Gyurko + * + * You may use this code as per GPL version 2 + */ + +#ifdef CONFIG_SYSFS + +extern int power_supply_create_attrs(struct power_supply *psy); +extern void power_supply_remove_attrs(struct power_supply *psy); +extern int power_supply_uevent(struct device *dev, char **envp, int num_envp, + char *buffer, int buffer_size); + +#else + +static inline int power_supply_create_attrs(struct power_supply *psy) +{ return 0; } +static inline void power_supply_remove_attrs(struct power_supply *psy) {} +#define power_supply_uevent NULL + +#endif /* CONFIG_SYSFS */ + +#ifdef CONFIG_LEDS_TRIGGERS + +extern void power_supply_update_leds(struct power_supply *psy); +extern int power_supply_create_triggers(struct power_supply *psy); +extern void power_supply_remove_triggers(struct power_supply *psy); + +#else + +static inline void power_supply_update_leds(struct power_supply *psy) {} +static inline int power_supply_create_triggers(struct power_supply *psy) +{ return 0; } +static inline void power_supply_remove_triggers(struct power_supply *psy) {} + +#endif /* CONFIG_LEDS_TRIGGERS */ diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c new file mode 100644 index 00000000000..e87ea515675 --- /dev/null +++ b/drivers/power/power_supply_core.c @@ -0,0 +1,168 @@ +/* + * Universal power supply monitor class + * + * Copyright © 2007 Anton Vorontsov <cbou@mail.ru> + * Copyright © 2004 Szabolcs Gyurko + * Copyright © 2003 Ian Molton <spyro@f2s.com> + * + * Modified: 2004, Oct Szabolcs Gyurko + * + * You may use this code as per GPL version 2 + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/init.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/power_supply.h> +#include "power_supply.h" + +struct class *power_supply_class; + +static void power_supply_changed_work(struct work_struct *work) +{ + struct power_supply *psy = container_of(work, struct power_supply, + changed_work); + int i; + + dev_dbg(psy->dev, "%s\n", __FUNCTION__); + + for (i = 0; i < psy->num_supplicants; i++) { + struct device *dev; + + down(&power_supply_class->sem); + list_for_each_entry(dev, &power_supply_class->devices, node) { + struct power_supply *pst = dev_get_drvdata(dev); + + if (!strcmp(psy->supplied_to[i], pst->name)) { + if (pst->external_power_changed) + pst->external_power_changed(pst); + } + } + up(&power_supply_class->sem); + } + + power_supply_update_leds(psy); + + kobject_uevent(&psy->dev->kobj, KOBJ_CHANGE); + + return; +} + +void power_supply_changed(struct power_supply *psy) +{ + dev_dbg(psy->dev, "%s\n", __FUNCTION__); + + schedule_work(&psy->changed_work); + + return; +} + +int power_supply_am_i_supplied(struct power_supply *psy) +{ + union power_supply_propval ret = {0,}; + struct device *dev; + + down(&power_supply_class->sem); + list_for_each_entry(dev, &power_supply_class->devices, node) { + struct power_supply *epsy = dev_get_drvdata(dev); + int i; + + for (i = 0; i < epsy->num_supplicants; i++) { + if (!strcmp(epsy->supplied_to[i], psy->name)) { + if (epsy->get_property(epsy, + POWER_SUPPLY_PROP_ONLINE, &ret)) + continue; + if (ret.intval) + goto out; + } + } + } +out: + up(&power_supply_class->sem); + + dev_dbg(psy->dev, "%s %d\n", __FUNCTION__, ret.intval); + + return ret.intval; +} + +int power_supply_register(struct device *parent, struct power_supply *psy) +{ + int rc = 0; + + psy->dev = device_create(power_supply_class, parent, 0, + "%s", psy->name); + if (IS_ERR(psy->dev)) { + rc = PTR_ERR(psy->dev); + goto dev_create_failed; + } + + dev_set_drvdata(psy->dev, psy); + + INIT_WORK(&psy->changed_work, power_supply_changed_work); + + rc = power_supply_create_attrs(psy); + if (rc) + goto create_attrs_failed; + + rc = power_supply_create_triggers(psy); + if (rc) + goto create_triggers_failed; + + power_supply_changed(psy); + + goto success; + +create_triggers_failed: + power_supply_remove_attrs(psy); +create_attrs_failed: + device_unregister(psy->dev); +dev_create_failed: +success: + return rc; +} + +void power_supply_unregister(struct power_supply *psy) +{ + flush_scheduled_work(); + power_supply_remove_triggers(psy); + power_supply_remove_attrs(psy); + device_unregister(psy->dev); + return; +} + +static int __init power_supply_class_init(void) +{ + power_supply_class = class_create(THIS_MODULE, "power_supply"); + + if (IS_ERR(power_supply_class)) + return PTR_ERR(power_supply_class); + + power_supply_class->dev_uevent = power_supply_uevent; + + return 0; +} + +static void __exit power_supply_class_exit(void) +{ + class_destroy(power_supply_class); + return; +} + +EXPORT_SYMBOL_GPL(power_supply_changed); +EXPORT_SYMBOL_GPL(power_supply_am_i_supplied); +EXPORT_SYMBOL_GPL(power_supply_register); +EXPORT_SYMBOL_GPL(power_supply_unregister); + +/* exported for the APM Power driver, APM emulation */ +EXPORT_SYMBOL_GPL(power_supply_class); + +subsys_initcall(power_supply_class_init); +module_exit(power_supply_class_exit); + +MODULE_DESCRIPTION("Universal power supply monitor class"); +MODULE_AUTHOR("Ian Molton <spyro@f2s.com>, " + "Szabolcs Gyurko, " + "Anton Vorontsov <cbou@mail.ru>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/power/power_supply_leds.c b/drivers/power/power_supply_leds.c new file mode 100644 index 00000000000..7232490bb59 --- /dev/null +++ b/drivers/power/power_supply_leds.c @@ -0,0 +1,176 @@ +/* + * LEDs triggers for power supply class + * + * Copyright © 2007 Anton Vorontsov <cbou@mail.ru> + * Copyright © 2004 Szabolcs Gyurko + * Copyright © 2003 Ian Molton <spyro@f2s.com> + * + * Modified: 2004, Oct Szabolcs Gyurko + * + * You may use this code as per GPL version 2 + */ + +#include <linux/power_supply.h> + +/* Battery specific LEDs triggers. */ + +static void power_supply_update_bat_leds(struct power_supply *psy) +{ + union power_supply_propval status; + + if (psy->get_property(psy, POWER_SUPPLY_PROP_STATUS, &status)) + return; + + dev_dbg(psy->dev, "%s %d\n", __FUNCTION__, status.intval); + + switch (status.intval) { + case POWER_SUPPLY_STATUS_FULL: + led_trigger_event(psy->charging_full_trig, LED_FULL); + led_trigger_event(psy->charging_trig, LED_OFF); + led_trigger_event(psy->full_trig, LED_FULL); + break; + case POWER_SUPPLY_STATUS_CHARGING: + led_trigger_event(psy->charging_full_trig, LED_FULL); + led_trigger_event(psy->charging_trig, LED_FULL); + led_trigger_event(psy->full_trig, LED_OFF); + break; + default: + led_trigger_event(psy->charging_full_trig, LED_OFF); + led_trigger_event(psy->charging_trig, LED_OFF); + led_trigger_event(psy->full_trig, LED_OFF); + break; + } + + return; +} + +static int power_supply_create_bat_triggers(struct power_supply *psy) +{ + int rc = 0; + + psy->charging_full_trig_name = kmalloc(strlen(psy->name) + + sizeof("-charging-or-full"), GFP_KERNEL); + if (!psy->charging_full_trig_name) + goto charging_full_failed; + + psy->charging_trig_name = kmalloc(strlen(psy->name) + + sizeof("-charging"), GFP_KERNEL); + if (!psy->charging_trig_name) + goto charging_failed; + + psy->full_trig_name = kmalloc(strlen(psy->name) + + sizeof("-full"), GFP_KERNEL); + if (!psy->full_trig_name) + goto full_failed; + + strcpy(psy->charging_full_trig_name, psy->name); + strcat(psy->charging_full_trig_name, "-charging-or-full"); + strcpy(psy->charging_trig_name, psy->name); + strcat(psy->charging_trig_name, "-charging"); + strcpy(psy->full_trig_name, psy->name); + strcat(psy->full_trig_name, "-full"); + + led_trigger_register_simple(psy->charging_full_trig_name, + &psy->charging_full_trig); + led_trigger_register_simple(psy->charging_trig_name, + &psy->charging_trig); + led_trigger_register_simple(psy->full_trig_name, + &psy->full_trig); + + goto success; + +full_failed: + kfree(psy->charging_trig_name); +charging_failed: + kfree(psy->charging_full_trig_name); +charging_full_failed: + rc = -ENOMEM; +success: + return rc; +} + +static void power_supply_remove_bat_triggers(struct power_supply *psy) +{ + led_trigger_unregister_simple(psy->charging_full_trig); + led_trigger_unregister_simple(psy->charging_trig); + led_trigger_unregister_simple(psy->full_trig); + kfree(psy->full_trig_name); + kfree(psy->charging_trig_name); + kfree(psy->charging_full_trig_name); + return; +} + +/* Generated power specific LEDs triggers. */ + +static void power_supply_update_gen_leds(struct power_supply *psy) +{ + union power_supply_propval online; + + if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online)) + return; + + dev_dbg(psy->dev, "%s %d\n", __FUNCTION__, online.intval); + + if (online.intval) + led_trigger_event(psy->online_trig, LED_FULL); + else + led_trigger_event(psy->online_trig, LED_OFF); + + return; +} + +static int power_supply_create_gen_triggers(struct power_supply *psy) +{ + int rc = 0; + + psy->online_trig_name = kmalloc(strlen(psy->name) + sizeof("-online"), + GFP_KERNEL); + if (!psy->online_trig_name) + goto online_failed; + + strcpy(psy->online_trig_name, psy->name); + strcat(psy->online_trig_name, "-online"); + + led_trigger_register_simple(psy->online_trig_name, &psy->online_trig); + + goto success; + +online_failed: + rc = -ENOMEM; +success: + return rc; +} + +static void power_supply_remove_gen_triggers(struct power_supply *psy) +{ + led_trigger_unregister_simple(psy->online_trig); + kfree(psy->online_trig_name); + return; +} + +/* Choice what triggers to create&update. */ + +void power_supply_update_leds(struct power_supply *psy) +{ + if (psy->type == POWER_SUPPLY_TYPE_BATTERY) + power_supply_update_bat_leds(psy); + else + power_supply_update_gen_leds(psy); + return; +} + +int power_supply_create_triggers(struct power_supply *psy) +{ + if (psy->type == POWER_SUPPLY_TYPE_BATTERY) + return power_supply_create_bat_triggers(psy); + return power_supply_create_gen_triggers(psy); +} + +void power_supply_remove_triggers(struct power_supply *psy) +{ + if (psy->type == POWER_SUPPLY_TYPE_BATTERY) + power_supply_remove_bat_triggers(psy); + else + power_supply_remove_gen_triggers(psy); + return; +} diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c new file mode 100644 index 00000000000..c07d4258d34 --- /dev/null +++ b/drivers/power/power_supply_sysfs.c @@ -0,0 +1,299 @@ +/* + * Sysfs interface for the universal power supply monitor class + * + * Copyright © 2007 David Woodhouse <dwmw2@infradead.org> + * Copyright © 2007 Anton Vorontsov <cbou@mail.ru> + * Copyright © 2004 Szabolcs Gyurko + * Copyright © 2003 Ian Molton <spyro@f2s.com> + * + * Modified: 2004, Oct Szabolcs Gyurko + * + * You may use this code as per GPL version 2 + */ + +#include <linux/ctype.h> +#include <linux/power_supply.h> + +/* + * This is because the name "current" breaks the device attr macro. + * The "current" word resolves to "(get_current())" so instead of + * "current" "(get_current())" appears in the sysfs. + * + * The source of this definition is the device.h which calls __ATTR + * macro in sysfs.h which calls the __stringify macro. + * + * Only modification that the name is not tried to be resolved + * (as a macro let's say). + */ + +#define POWER_SUPPLY_ATTR(_name) \ +{ \ + .attr = { .name = #_name, .mode = 0444, .owner = THIS_MODULE }, \ + .show = power_supply_show_property, \ + .store = NULL, \ +} + +static struct device_attribute power_supply_attrs[]; + +static ssize_t power_supply_show_property(struct device *dev, + struct device_attribute *attr, + char *buf) { + static char *status_text[] = { + "Unknown", "Charging", "Discharging", "Not charging", "Full" + }; + static char *health_text[] = { + "Unknown", "Good", "Overheat", "Dead", "Over voltage", + "Unspecified failure" + }; + static char *technology_text[] = { + "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe", "NiCd" + }; + static char *capacity_level_text[] = { + "Unknown", "Critical", "Low", "Normal", "High", "Full" + }; + ssize_t ret; + struct power_supply *psy = dev_get_drvdata(dev); + const ptrdiff_t off = attr - power_supply_attrs; + union power_supply_propval value; + + ret = psy->get_property(psy, off, &value); + + if (ret < 0) { + if (ret != -ENODEV) + dev_err(dev, "driver failed to report `%s' property\n", + attr->attr.name); + return ret; + } + + if (off == POWER_SUPPLY_PROP_STATUS) + return sprintf(buf, "%s\n", status_text[value.intval]); + else if (off == POWER_SUPPLY_PROP_HEALTH) + return sprintf(buf, "%s\n", health_text[value.intval]); + else if (off == POWER_SUPPLY_PROP_TECHNOLOGY) + return sprintf(buf, "%s\n", technology_text[value.intval]); + else if (off == POWER_SUPPLY_PROP_CAPACITY_LEVEL) + return sprintf(buf, "%s\n", + capacity_level_text[value.intval]); + else if (off >= POWER_SUPPLY_PROP_MODEL_NAME) + return sprintf(buf, "%s\n", value.strval); + + return sprintf(buf, "%d\n", value.intval); +} + +/* Must be in the same order as POWER_SUPPLY_PROP_* */ +static struct device_attribute power_supply_attrs[] = { + /* Properties of type `int' */ + POWER_SUPPLY_ATTR(status), + POWER_SUPPLY_ATTR(health), + POWER_SUPPLY_ATTR(present), + POWER_SUPPLY_ATTR(online), + POWER_SUPPLY_ATTR(technology), + POWER_SUPPLY_ATTR(voltage_max_design), + POWER_SUPPLY_ATTR(voltage_min_design), + POWER_SUPPLY_ATTR(voltage_now), + POWER_SUPPLY_ATTR(voltage_avg), + POWER_SUPPLY_ATTR(current_now), + POWER_SUPPLY_ATTR(current_avg), + POWER_SUPPLY_ATTR(charge_full_design), + POWER_SUPPLY_ATTR(charge_empty_design), + POWER_SUPPLY_ATTR(charge_full), + POWER_SUPPLY_ATTR(charge_empty), + POWER_SUPPLY_ATTR(charge_now), + POWER_SUPPLY_ATTR(charge_avg), + POWER_SUPPLY_ATTR(energy_full_design), + POWER_SUPPLY_ATTR(energy_empty_design), + POWER_SUPPLY_ATTR(energy_full), + POWER_SUPPLY_ATTR(energy_empty), + POWER_SUPPLY_ATTR(energy_now), + POWER_SUPPLY_ATTR(energy_avg), + POWER_SUPPLY_ATTR(capacity), + POWER_SUPPLY_ATTR(capacity_level), + POWER_SUPPLY_ATTR(temp), + POWER_SUPPLY_ATTR(temp_ambient), + POWER_SUPPLY_ATTR(time_to_empty_now), + POWER_SUPPLY_ATTR(time_to_empty_avg), + POWER_SUPPLY_ATTR(time_to_full_now), + POWER_SUPPLY_ATTR(time_to_full_avg), + /* Properties of type `const char *' */ + POWER_SUPPLY_ATTR(model_name), + POWER_SUPPLY_ATTR(manufacturer), +}; + +static ssize_t power_supply_show_static_attrs(struct device *dev, + struct device_attribute *attr, + char *buf) { + static char *type_text[] = { "Battery", "UPS", "Mains", "USB" }; + struct power_supply *psy = dev_get_drvdata(dev); + + return sprintf(buf, "%s\n", type_text[psy->type]); +} + +static struct device_attribute power_supply_static_attrs[] = { + __ATTR(type, 0444, power_supply_show_static_attrs, NULL), +}; + +int power_supply_create_attrs(struct power_supply *psy) +{ + int rc = 0; + int i, j; + + for (i = 0; i < ARRAY_SIZE(power_supply_static_attrs); i++) { + rc = device_create_file(psy->dev, + &power_supply_static_attrs[i]); + if (rc) + goto statics_failed; + } + + for (j = 0; j < psy->num_properties; j++) { + rc = device_create_file(psy->dev, + &power_supply_attrs[psy->properties[j]]); + if (rc) + goto dynamics_failed; + } + + goto succeed; + +dynamics_failed: + while (j--) + device_remove_file(psy->dev, + &power_supply_attrs[psy->properties[j]]); +statics_failed: + while (i--) + device_remove_file(psy->dev, + &power_supply_static_attrs[psy->properties[i]]); +succeed: + return rc; +} + +void power_supply_remove_attrs(struct power_supply *psy) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(power_supply_static_attrs); i++) + device_remove_file(psy->dev, + &power_supply_static_attrs[i]); + + for (i = 0; i < psy->num_properties; i++) + device_remove_file(psy->dev, + &power_supply_attrs[psy->properties[i]]); + + return; +} + +static char *kstruprdup(const char *str, gfp_t gfp) +{ + char *ret, *ustr; + + ustr = ret = kmalloc(strlen(str) + 1, gfp); + + if (!ret) + return NULL; + + while (*str) + *ustr++ = toupper(*str++); + + *ustr = 0; + + return ret; +} + +int power_supply_uevent(struct device *dev, char **envp, int num_envp, + char *buffer, int buffer_size) +{ + struct power_supply *psy = dev_get_drvdata(dev); + int i = 0, length = 0, ret = 0, j; + char *prop_buf; + char *attrname; + + dev_dbg(dev, "uevent\n"); + + if (!psy) { + dev_dbg(dev, "No power supply yet\n"); + return ret; + } + + dev_dbg(dev, "POWER_SUPPLY_NAME=%s\n", psy->name); + + ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size, + &length, "POWER_SUPPLY_NAME=%s", psy->name); + if (ret) + return ret; + + prop_buf = (char *)get_zeroed_page(GFP_KERNEL); + if (!prop_buf) + return -ENOMEM; + + for (j = 0; j < ARRAY_SIZE(power_supply_static_attrs); j++) { + struct device_attribute *attr; + char *line; + + attr = &power_supply_static_attrs[j]; + + ret = power_supply_show_static_attrs(dev, attr, prop_buf); + if (ret < 0) + goto out; + + line = strchr(prop_buf, '\n'); + if (line) + *line = 0; + + attrname = kstruprdup(attr->attr.name, GFP_KERNEL); + if (!attrname) { + ret = -ENOMEM; + goto out; + } + + dev_dbg(dev, "Static prop %s=%s\n", attrname, prop_buf); + + ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size, + &length, "POWER_SUPPLY_%s=%s", + attrname, prop_buf); + kfree(attrname); + if (ret) + goto out; + } + + dev_dbg(dev, "%zd dynamic props\n", psy->num_properties); + + for (j = 0; j < psy->num_properties; j++) { + struct device_attribute *attr; + char *line; + + attr = &power_supply_attrs[psy->properties[j]]; + + ret = power_supply_show_property(dev, attr, prop_buf); + if (ret == -ENODEV) { + /* When a battery is absent, we expect -ENODEV. Don't abort; + send the uevent with at least the the PRESENT=0 property */ + ret = 0; + continue; + } + + if (ret < 0) + goto out; + + line = strchr(prop_buf, '\n'); + if (line) + *line = 0; + + attrname = kstruprdup(attr->attr.name, GFP_KERNEL); + if (!attrname) { + ret = -ENOMEM; + goto out; + } + + dev_dbg(dev, "prop %s=%s\n", attrname, prop_buf); + + ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size, + &length, "POWER_SUPPLY_%s=%s", + attrname, prop_buf); + kfree(attrname); + if (ret) + goto out; + } + +out: + free_page((unsigned long)prop_buf); + + return ret; +} diff --git a/drivers/w1/slaves/Kconfig b/drivers/w1/slaves/Kconfig index 904e5aeb696..df95d6c2cef 100644 --- a/drivers/w1/slaves/Kconfig +++ b/drivers/w1/slaves/Kconfig @@ -35,4 +35,17 @@ config W1_SLAVE_DS2433_CRC Each block has 30 bytes of data and a two byte CRC16. Full block writes are only allowed if the CRC is valid. +config W1_SLAVE_DS2760 + tristate "Dallas 2760 battery monitor chip (HP iPAQ & others)" + depends on W1 + help + If you enable this you will have the DS2760 battery monitor + chip support. + + The battery monitor chip is used in many batteries/devices + as the one who is responsible for charging/discharging/monitoring + Li+ batteries. + + If you are unsure, say N. + endmenu diff --git a/drivers/w1/slaves/Makefile b/drivers/w1/slaves/Makefile index 725dcfdfddb..a8eb7524df1 100644 --- a/drivers/w1/slaves/Makefile +++ b/drivers/w1/slaves/Makefile @@ -5,4 +5,5 @@ obj-$(CONFIG_W1_SLAVE_THERM) += w1_therm.o obj-$(CONFIG_W1_SLAVE_SMEM) += w1_smem.o obj-$(CONFIG_W1_SLAVE_DS2433) += w1_ds2433.o +obj-$(CONFIG_W1_SLAVE_DS2760) += w1_ds2760.o diff --git a/drivers/w1/slaves/w1_ds2760.c b/drivers/w1/slaves/w1_ds2760.c new file mode 100644 index 00000000000..88a37fbccc3 --- /dev/null +++ b/drivers/w1/slaves/w1_ds2760.c @@ -0,0 +1,213 @@ +/* + * 1-Wire implementation for the ds2760 chip + * + * Copyright © 2004-2005, Szabolcs Gyurko <szabolcs.gyurko@tlt.hu> + * + * Use consistent with the GNU GPL is permitted, + * provided that this copyright notice is + * preserved in its entirety in all copies and derived works. + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/types.h> +#include <linux/platform_device.h> +#include <linux/mutex.h> +#include <linux/idr.h> + +#include "../w1.h" +#include "../w1_int.h" +#include "../w1_family.h" +#include "w1_ds2760.h" + +static int w1_ds2760_io(struct device *dev, char *buf, int addr, size_t count, + int io) +{ + struct w1_slave *sl = container_of(dev, struct w1_slave, dev); + + if (!dev) + return 0; + + mutex_lock(&sl->master->mutex); + + if (addr > DS2760_DATA_SIZE || addr < 0) { + count = 0; + goto out; + } + if (addr + count > DS2760_DATA_SIZE) + count = DS2760_DATA_SIZE - addr; + + if (!w1_reset_select_slave(sl)) { + if (!io) { + w1_write_8(sl->master, W1_DS2760_READ_DATA); + w1_write_8(sl->master, addr); + count = w1_read_block(sl->master, buf, count); + } else { + w1_write_8(sl->master, W1_DS2760_WRITE_DATA); + w1_write_8(sl->master, addr); + w1_write_block(sl->master, buf, count); + /* XXX w1_write_block returns void, not n_written */ + } + } + +out: + mutex_unlock(&sl->master->mutex); + + return count; +} + +int w1_ds2760_read(struct device *dev, char *buf, int addr, size_t count) +{ + return w1_ds2760_io(dev, buf, addr, count, 0); +} + +int w1_ds2760_write(struct device *dev, char *buf, int addr, size_t count) +{ + return w1_ds2760_io(dev, buf, addr, count, 1); +} + +static ssize_t w1_ds2760_read_bin(struct kobject *kobj, char *buf, loff_t off, + size_t count) +{ + struct device *dev = container_of(kobj, struct device, kobj); + return w1_ds2760_read(dev, buf, off, count); +} + +static struct bin_attribute w1_ds2760_bin_attr = { + .attr = { + .name = "w1_slave", + .mode = S_IRUGO, + .owner = THIS_MODULE, + }, + .size = DS2760_DATA_SIZE, + .read = w1_ds2760_read_bin, +}; + +static DEFINE_IDR(bat_idr); +static DEFINE_MUTEX(bat_idr_lock); + +static int new_bat_id(void) +{ + int ret; + + while (1) { + int id; + + ret = idr_pre_get(&bat_idr, GFP_KERNEL); + if (ret == 0) + return -ENOMEM; + + mutex_lock(&bat_idr_lock); + ret = idr_get_new(&bat_idr, NULL, &id); + mutex_unlock(&bat_idr_lock); + + if (ret == 0) { + ret = id & MAX_ID_MASK; + break; + } else if (ret == -EAGAIN) { + continue; + } else { + break; + } + } + + return ret; +} + +static void release_bat_id(int id) +{ + mutex_lock(&bat_idr_lock); + idr_remove(&bat_idr, id); + mutex_unlock(&bat_idr_lock); + + return; +} + +static int w1_ds2760_add_slave(struct w1_slave *sl) +{ + int ret; + int id; + struct platform_device *pdev; + + id = new_bat_id(); + if (id < 0) { + ret = id; + goto noid; + } + + pdev = platform_device_alloc("ds2760-battery", id); + if (!pdev) { + ret = -ENOMEM; + goto pdev_alloc_failed; + } + pdev->dev.parent = &sl->dev; + + ret = platform_device_add(pdev); + if (ret) + goto pdev_add_failed; + + ret = sysfs_create_bin_file(&sl->dev.kobj, &w1_ds2760_bin_attr); + if (ret) + goto bin_attr_failed; + + dev_set_drvdata(&sl->dev, pdev); + + goto success; + +bin_attr_failed: +pdev_add_failed: + platform_device_unregister(pdev); +pdev_alloc_failed: + release_bat_id(id); +noid: +success: + return ret; +} + +static void w1_ds2760_remove_slave(struct w1_slave *sl) +{ + struct platform_device *pdev = dev_get_drvdata(&sl->dev); + int id = pdev->id; + + platform_device_unregister(pdev); + release_bat_id(id); + sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2760_bin_attr); + + return; +} + +static struct w1_family_ops w1_ds2760_fops = { + .add_slave = w1_ds2760_add_slave, + .remove_slave = w1_ds2760_remove_slave, +}; + +static struct w1_family w1_ds2760_family = { + .fid = W1_FAMILY_DS2760, + .fops = &w1_ds2760_fops, +}; + +static int __init w1_ds2760_init(void) +{ + printk(KERN_INFO "1-Wire driver for the DS2760 battery monitor " + " chip - (c) 2004-2005, Szabolcs Gyurko\n"); + idr_init(&bat_idr); + return w1_register_family(&w1_ds2760_family); +} + +static void __exit w1_ds2760_exit(void) +{ + w1_unregister_family(&w1_ds2760_family); + idr_destroy(&bat_idr); +} + +EXPORT_SYMBOL(w1_ds2760_read); +EXPORT_SYMBOL(w1_ds2760_write); + +module_init(w1_ds2760_init); +module_exit(w1_ds2760_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>"); +MODULE_DESCRIPTION("1-wire Driver Dallas 2760 battery monitor chip"); diff --git a/drivers/w1/slaves/w1_ds2760.h b/drivers/w1/slaves/w1_ds2760.h new file mode 100644 index 00000000000..f1302429cb0 --- /dev/null +++ b/drivers/w1/slaves/w1_ds2760.h @@ -0,0 +1,50 @@ +/* + * 1-Wire implementation for the ds2760 chip + * + * Copyright © 2004-2005, Szabolcs Gyurko <szabolcs.gyurko@tlt.hu> + * + * Use consistent with the GNU GPL is permitted, + * provided that this copyright notice is + * preserved in its entirety in all copies and derived works. + * + */ + +#ifndef __w1_ds2760_h__ +#define __w1_ds2760_h__ + +/* Known commands to the DS2760 chip */ +#define W1_DS2760_SWAP 0xAA +#define W1_DS2760_READ_DATA 0x69 +#define W1_DS2760_WRITE_DATA 0x6C +#define W1_DS2760_COPY_DATA 0x48 +#define W1_DS2760_RECALL_DATA 0xB8 +#define W1_DS2760_LOCK 0x6A + +/* Number of valid register addresses */ +#define DS2760_DATA_SIZE 0x40 + +#define DS2760_PROTECTION_REG 0x00 +#define DS2760_STATUS_REG 0x01 +#define DS2760_EEPROM_REG 0x07 +#define DS2760_SPECIAL_FEATURE_REG 0x08 +#define DS2760_VOLTAGE_MSB 0x0c +#define DS2760_VOLTAGE_LSB 0x0d +#define DS2760_CURRENT_MSB 0x0e +#define DS2760_CURRENT_LSB 0x0f +#define DS2760_CURRENT_ACCUM_MSB 0x10 +#define DS2760_CURRENT_ACCUM_LSB 0x11 +#define DS2760_TEMP_MSB 0x18 +#define DS2760_TEMP_LSB 0x19 +#define DS2760_EEPROM_BLOCK0 0x20 +#define DS2760_ACTIVE_FULL 0x20 +#define DS2760_EEPROM_BLOCK1 0x30 +#define DS2760_RATED_CAPACITY 0x32 +#define DS2760_CURRENT_OFFSET_BIAS 0x33 +#define DS2760_ACTIVE_EMPTY 0x3b + +extern int w1_ds2760_read(struct device *dev, char *buf, int addr, + size_t count); +extern int w1_ds2760_write(struct device *dev, char *buf, int addr, + size_t count); + +#endif /* !__w1_ds2760_h__ */ diff --git a/drivers/w1/w1_family.h b/drivers/w1/w1_family.h index 1e2ac40c2c1..ef1e1dafa19 100644 --- a/drivers/w1/w1_family.h +++ b/drivers/w1/w1_family.h @@ -33,6 +33,7 @@ #define W1_THERM_DS1822 0x22 #define W1_EEPROM_DS2433 0x23 #define W1_THERM_DS18B20 0x28 +#define W1_FAMILY_DS2760 0x30 #define MAXNAMELEN 32 |