From 1ca5b9d2183f11bb8b69e04b19a7faf7f600a840 Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Sun, 4 May 2008 01:31:42 -0400 Subject: [PATCH 1/7] power_supply: Support serial number in olpc_battery This adds serial number support to the OLPC battery driver. Signed-off-by: David Woodhouse Signed-off-by: Andres Salomon Signed-off-by: Anton Vorontsov --- drivers/power/olpc_battery.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c index ab1e8289f07f..7524a63a54cb 100644 --- a/drivers/power/olpc_battery.c +++ b/drivers/power/olpc_battery.c @@ -84,6 +84,8 @@ static struct power_supply olpc_ac = { .get_property = olpc_ac_get_prop, }; +static char bat_serial[17]; /* Ick */ + /********************************************************************* * Battery properties *********************************************************************/ @@ -94,6 +96,7 @@ static int olpc_bat_get_property(struct power_supply *psy, int ret = 0; int16_t ec_word; uint8_t ec_byte; + uint64_t ser_buf; ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &ec_byte, 1); if (ret) @@ -241,6 +244,14 @@ static int olpc_bat_get_property(struct power_supply *psy, ec_word = be16_to_cpu(ec_word); val->intval = ec_word * 100 / 256; break; + case POWER_SUPPLY_PROP_SERIAL_NUMBER: + ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8); + if (ret) + return ret; + + sprintf(bat_serial, "%016llx", (long long)be64_to_cpu(ser_buf)); + val->strval = bat_serial; + break; default: ret = -EINVAL; break; @@ -260,6 +271,7 @@ static enum power_supply_property olpc_bat_props[] = { POWER_SUPPLY_PROP_TEMP, POWER_SUPPLY_PROP_TEMP_AMBIENT, POWER_SUPPLY_PROP_MANUFACTURER, + POWER_SUPPLY_PROP_SERIAL_NUMBER, }; /********************************************************************* From d7eb9e36c42504e87c7d92dd5c05cb6f2cf74d28 Mon Sep 17 00:00:00 2001 From: Andres Salomon Date: Fri, 2 May 2008 13:41:58 -0700 Subject: [PATCH 2/7] power_supply: add eeprom dump file to olpc_battery's sysfs This allows you to dump 0x60 bytes from the battery's EEPROM (starting at address 0x20). Note that it does an EC command for each byte, so it's pretty slow. OTOH, if you want to grab just a single byte from somewhere in the EEPROM, you can do something like: dd bs=1 count=1 skip=16 if=/sys/class/power_supply/olpc-battery/eeprom | od -x Userspace battery collection/logging information needs this. Signed-off-by: Andres Salomon Cc: David Woodhouse Signed-off-by: Andrew Morton Signed-off-by: Anton Vorontsov --- drivers/power/olpc_battery.c | 49 ++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c index 7524a63a54cb..f8dc2b18bb49 100644 --- a/drivers/power/olpc_battery.c +++ b/drivers/power/olpc_battery.c @@ -274,6 +274,48 @@ static enum power_supply_property olpc_bat_props[] = { POWER_SUPPLY_PROP_SERIAL_NUMBER, }; +/* EEPROM reading goes completely around the power_supply API, sadly */ + +#define EEPROM_START 0x20 +#define EEPROM_END 0x80 +#define EEPROM_SIZE (EEPROM_END - EEPROM_START) + +static ssize_t olpc_bat_eeprom_read(struct kobject *kobj, + struct bin_attribute *attr, char *buf, loff_t off, size_t count) +{ + uint8_t ec_byte; + int ret, end; + + if (off >= EEPROM_SIZE) + return 0; + if (off + count > EEPROM_SIZE) + count = EEPROM_SIZE - off; + + end = EEPROM_START + off + count; + for (ec_byte = EEPROM_START + off; ec_byte < end; ec_byte++) { + ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, + &buf[ec_byte - EEPROM_START], 1); + if (ret) { + printk(KERN_ERR "olpc-battery: EC command " + "EC_BAT_EEPROM @ 0x%x failed -" + " %d!\n", ec_byte, ret); + return -EIO; + } + } + + return count; +} + +static struct bin_attribute olpc_bat_eeprom = { + .attr = { + .name = "eeprom", + .mode = S_IRUGO, + .owner = THIS_MODULE, + }, + .size = 0, + .read = olpc_bat_eeprom_read, +}; + /********************************************************************* * Initialisation *********************************************************************/ @@ -327,8 +369,14 @@ static int __init olpc_bat_init(void) if (ret) goto battery_failed; + ret = device_create_bin_file(olpc_bat.dev, &olpc_bat_eeprom); + if (ret) + goto eeprom_failed; + goto success; +eeprom_failed: + power_supply_unregister(&olpc_bat); battery_failed: power_supply_unregister(&olpc_ac); ac_failed: @@ -339,6 +387,7 @@ success: static void __exit olpc_bat_exit(void) { + device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom); power_supply_unregister(&olpc_bat); power_supply_unregister(&olpc_ac); platform_device_unregister(bat_pdev); From b2bd8a3bcdd18101eb5d85c267c1a1fb8ce9acc7 Mon Sep 17 00:00:00 2001 From: Andres Salomon Date: Fri, 2 May 2008 13:41:59 -0700 Subject: [PATCH 3/7] power_supply: cleanup of the OLPC battery driver Move portions of the massive switch statement into functions. The layout of this thing has already caused one bug (a break in the wrong place), it needed to shrink. Signed-off-by: Andres Salomon Cc: David Woodhouse Signed-off-by: Andrew Morton Signed-off-by: Anton Vorontsov --- drivers/power/olpc_battery.c | 191 ++++++++++++++++++++++------------- 1 file changed, 118 insertions(+), 73 deletions(-) diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c index f8dc2b18bb49..d5fe6f0c9de0 100644 --- a/drivers/power/olpc_battery.c +++ b/drivers/power/olpc_battery.c @@ -86,6 +86,117 @@ static struct power_supply olpc_ac = { static char bat_serial[17]; /* Ick */ +static int olpc_bat_get_status(union power_supply_propval *val, uint8_t ec_byte) +{ + 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; + } + + return 0; +} + +static int olpc_bat_get_health(union power_supply_propval *val) +{ + uint8_t ec_byte; + int ret; + + 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 */ + ret = -EIO; + } + + return ret; +} + +static int olpc_bat_get_mfr(union power_supply_propval *val) +{ + uint8_t ec_byte; + int ret; + + 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; + } + + return ret; +} + +static int olpc_bat_get_tech(union power_supply_propval *val) +{ + uint8_t ec_byte; + int ret; + + 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; + } + + return ret; +} + /********************************************************************* * Battery properties *********************************************************************/ @@ -113,25 +224,10 @@ static int olpc_bat_get_property(struct power_supply *psy, 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; - } + ret = olpc_bat_get_status(val, ec_byte); + if (ret) + return ret; + break; case POWER_SUPPLY_PROP_PRESENT: val->intval = !!(ec_byte & BAT_STAT_PRESENT); break; @@ -140,72 +236,21 @@ static int olpc_bat_get_property(struct power_supply *psy, 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); + ret = olpc_bat_get_health(val); 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); + ret = olpc_bat_get_mfr(val); 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); + ret = olpc_bat_get_tech(val); 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); From 484d6d50cca3941db6e063113d124333aed0abc0 Mon Sep 17 00:00:00 2001 From: Andres Salomon Date: Fri, 2 May 2008 13:41:59 -0700 Subject: [PATCH 4/7] power_supply: bump EC version check that we refuse to run with in olpc_battery Refuse to run with an EC < 0x44. We're playing it safe, and this is a pretty old EC version. Also, add a comment about why we're checking the EC version. Signed-off-by: Andres Salomon Cc: David Woodhouse Signed-off-by: Andrew Morton Signed-off-by: Anton Vorontsov --- drivers/power/olpc_battery.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c index d5fe6f0c9de0..c8b596a7fc94 100644 --- a/drivers/power/olpc_battery.c +++ b/drivers/power/olpc_battery.c @@ -389,8 +389,14 @@ static int __init olpc_bat_init(void) 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); + + /* + * We've seen a number of EC protocol changes; this driver requires + * the latest EC protocol, supported by 0x44 and above. + */ + if (olpc_platform_info.ecver < 0x44) { + printk(KERN_NOTICE "OLPC EC version 0x%02x too old for " + "battery driver.\n", olpc_platform_info.ecver); return -ENXIO; } From 8e552c36d90c03d2cabf5373788998966751b609 Mon Sep 17 00:00:00 2001 From: Andres Salomon Date: Mon, 12 May 2008 21:46:29 -0400 Subject: [PATCH 5/7] power_supply: add CHARGE_COUNTER property and olpc_battery support for it This adds PROP_CHARGE_COUNTER to the power supply class (documenting it as well). The OLPC battery driver uses this for spitting out its ACR values (in uAh). We have some rounding errors (the data sheet claims 416.7, the math actually works out to 416.666667, so we're forced to choose between overflows or precision loss. I chose precision loss, and stuck w/ data sheet values), but I don't think anyone will care that much. Signed-off-by: Andres Salomon Signed-off-by: Anton Vorontsov --- Documentation/power/power_supply_class.txt | 4 ++++ drivers/power/olpc_battery.c | 11 ++++++++++- drivers/power/power_supply_sysfs.c | 1 + include/linux/power_supply.h | 1 + 4 files changed, 16 insertions(+), 1 deletion(-) diff --git a/Documentation/power/power_supply_class.txt b/Documentation/power/power_supply_class.txt index a8686e5a6857..c6cd4956047c 100644 --- a/Documentation/power/power_supply_class.txt +++ b/Documentation/power/power_supply_class.txt @@ -101,6 +101,10 @@ of charge when battery became full/empty". It also could mean "value of charge when battery considered full/empty at given conditions (temperature, age)". I.e. these attributes represents real thresholds, not design values. +CHARGE_COUNTER - the current charge counter (in µAh). This could easily +be negative; there is no empty or full value. It is only useful for +relative, time-based measurements. + ENERGY_FULL, ENERGY_EMPTY - same as above but for energy. CAPACITY - capacity in percents. diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c index c8b596a7fc94..9dd1589733c2 100644 --- a/drivers/power/olpc_battery.c +++ b/drivers/power/olpc_battery.c @@ -19,7 +19,7 @@ #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_ACR 0x12 /* int16_t, *416.7, µAh */ #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 */ @@ -289,6 +289,14 @@ static int olpc_bat_get_property(struct power_supply *psy, ec_word = be16_to_cpu(ec_word); val->intval = ec_word * 100 / 256; break; + case POWER_SUPPLY_PROP_CHARGE_COUNTER: + ret = olpc_ec_cmd(EC_BAT_ACR, NULL, 0, (void *)&ec_word, 2); + if (ret) + return ret; + + ec_word = be16_to_cpu(ec_word); + val->intval = ec_word * 4167 / 10; + break; case POWER_SUPPLY_PROP_SERIAL_NUMBER: ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8); if (ret) @@ -317,6 +325,7 @@ static enum power_supply_property olpc_bat_props[] = { POWER_SUPPLY_PROP_TEMP_AMBIENT, POWER_SUPPLY_PROP_MANUFACTURER, POWER_SUPPLY_PROP_SERIAL_NUMBER, + POWER_SUPPLY_PROP_CHARGE_COUNTER, }; /* EEPROM reading goes completely around the power_supply API, sadly */ diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c index c444d6b10c58..82e1246eeb0a 100644 --- a/drivers/power/power_supply_sysfs.c +++ b/drivers/power/power_supply_sysfs.c @@ -99,6 +99,7 @@ static struct device_attribute power_supply_attrs[] = { POWER_SUPPLY_ATTR(charge_empty), POWER_SUPPLY_ATTR(charge_now), POWER_SUPPLY_ATTR(charge_avg), + POWER_SUPPLY_ATTR(charge_counter), POWER_SUPPLY_ATTR(energy_full_design), POWER_SUPPLY_ATTR(energy_empty_design), POWER_SUPPLY_ATTR(energy_full), diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h index 68ed19ccf1f7..ea96ead1d39d 100644 --- a/include/linux/power_supply.h +++ b/include/linux/power_supply.h @@ -78,6 +78,7 @@ enum power_supply_property { POWER_SUPPLY_PROP_CHARGE_EMPTY, POWER_SUPPLY_PROP_CHARGE_NOW, POWER_SUPPLY_PROP_CHARGE_AVG, + POWER_SUPPLY_PROP_CHARGE_COUNTER, POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN, POWER_SUPPLY_PROP_ENERGY_FULL, From 75d8807962fc7529b4946e9ec92cae197be5a967 Mon Sep 17 00:00:00 2001 From: Andres Salomon Date: Wed, 14 May 2008 16:20:38 -0700 Subject: [PATCH 6/7] power_supply: fix up CHARGE_COUNTER output to be more precise As Richard Smith pointed out, ACR * 6250 / 15 provides for less precision loss than ACR * 4167 / 10, _and_ it doesn't overflow. Switch to using that equation for CHARGE_COUNTER. Signed-off-by: Andres Salomon Cc: "Richard A. Smith" Signed-off-by: Andrew Morton Signed-off-by: Anton Vorontsov --- drivers/power/olpc_battery.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c index 9dd1589733c2..32570af3c5c9 100644 --- a/drivers/power/olpc_battery.c +++ b/drivers/power/olpc_battery.c @@ -19,7 +19,7 @@ #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 /* int16_t, *416.7, µAh */ +#define EC_BAT_ACR 0x12 /* int16_t, *6250/15, µAh */ #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 */ @@ -295,7 +295,7 @@ static int olpc_bat_get_property(struct power_supply *psy, return ret; ec_word = be16_to_cpu(ec_word); - val->intval = ec_word * 4167 / 10; + val->intval = ec_word * 6250 / 15; break; case POWER_SUPPLY_PROP_SERIAL_NUMBER: ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8); From fece418418f51e92dd7e67e17c5e3fe5a28d3279 Mon Sep 17 00:00:00 2001 From: Dmitry Baryshkov Date: Tue, 24 Jun 2008 18:51:07 +0400 Subject: [PATCH 7/7] power_supply: Sharp SL-6000 (tosa) batteries support This patch adds common battery interface support for Sharp SL-6000 (tosa). Signed-off-by: Dmitry Baryshkov Signed-off-by: Anton Vorontsov --- drivers/power/Kconfig | 7 + drivers/power/Makefile | 1 + drivers/power/tosa_battery.c | 486 +++++++++++++++++++++++++++++++++++ 3 files changed, 494 insertions(+) create mode 100644 drivers/power/tosa_battery.c diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig index 58c806e9c58a..e3a9c37d08f6 100644 --- a/drivers/power/Kconfig +++ b/drivers/power/Kconfig @@ -49,4 +49,11 @@ config BATTERY_OLPC help Say Y to enable support for the battery on the OLPC laptop. +config BATTERY_TOSA + tristate "Sharp SL-6000 (tosa) battery" + depends on MACH_TOSA && MFD_TC6393XB + help + Say Y to enable support for the battery on the Sharp Zaurus + SL-6000 (tosa) models. + endif # POWER_SUPPLY diff --git a/drivers/power/Makefile b/drivers/power/Makefile index 6413ded5fe5f..1e408fa268cf 100644 --- a/drivers/power/Makefile +++ b/drivers/power/Makefile @@ -20,3 +20,4 @@ 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 +obj-$(CONFIG_BATTERY_TOSA) += tosa_battery.o diff --git a/drivers/power/tosa_battery.c b/drivers/power/tosa_battery.c new file mode 100644 index 000000000000..bf664fbd6610 --- /dev/null +++ b/drivers/power/tosa_battery.c @@ -0,0 +1,486 @@ +/* + * Battery and Power Management code for the Sharp SL-6000x + * + * Copyright (c) 2005 Dirk Opfer + * Copyright (c) 2008 Dmitry Baryshkov + * + * 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 +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +static DEFINE_MUTEX(bat_lock); /* protects gpio pins */ +static struct work_struct bat_work; + +struct tosa_bat { + int status; + struct power_supply psy; + int full_chrg; + + struct mutex work_lock; /* protects data */ + + bool (*is_present)(struct tosa_bat *bat); + int gpio_full; + int gpio_charge_off; + + int technology; + + int gpio_bat; + int adc_bat; + int adc_bat_divider; + int bat_max; + int bat_min; + + int gpio_temp; + int adc_temp; + int adc_temp_divider; +}; + +static struct tosa_bat tosa_bat_main; +static struct tosa_bat tosa_bat_jacket; + +static unsigned long tosa_read_bat(struct tosa_bat *bat) +{ + unsigned long value = 0; + + if (bat->gpio_bat < 0 || bat->adc_bat < 0) + return 0; + + mutex_lock(&bat_lock); + gpio_set_value(bat->gpio_bat, 1); + msleep(5); + value = wm97xx_read_aux_adc(bat->psy.dev->parent->driver_data, + bat->adc_bat); + gpio_set_value(bat->gpio_bat, 0); + mutex_unlock(&bat_lock); + + value = value * 1000000 / bat->adc_bat_divider; + + return value; +} + +static unsigned long tosa_read_temp(struct tosa_bat *bat) +{ + unsigned long value = 0; + + if (bat->gpio_temp < 0 || bat->adc_temp < 0) + return 0; + + mutex_lock(&bat_lock); + gpio_set_value(bat->gpio_temp, 1); + msleep(5); + value = wm97xx_read_aux_adc(bat->psy.dev->parent->driver_data, + bat->adc_temp); + gpio_set_value(bat->gpio_temp, 0); + mutex_unlock(&bat_lock); + + value = value * 10000 / bat->adc_temp_divider; + + return value; +} + +static int tosa_bat_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + int ret = 0; + struct tosa_bat *bat = container_of(psy, struct tosa_bat, psy); + + if (bat->is_present && !bat->is_present(bat) + && psp != POWER_SUPPLY_PROP_PRESENT) { + return -ENODEV; + } + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + val->intval = bat->status; + break; + case POWER_SUPPLY_PROP_TECHNOLOGY: + val->intval = bat->technology; + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + val->intval = tosa_read_bat(bat); + break; + case POWER_SUPPLY_PROP_VOLTAGE_MAX: + if (bat->full_chrg == -1) + val->intval = bat->bat_max; + else + val->intval = bat->full_chrg; + break; + case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: + val->intval = bat->bat_max; + break; + case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: + val->intval = bat->bat_min; + break; + case POWER_SUPPLY_PROP_TEMP: + val->intval = tosa_read_temp(bat); + break; + case POWER_SUPPLY_PROP_PRESENT: + val->intval = bat->is_present ? bat->is_present(bat) : 1; + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static bool tosa_jacket_bat_is_present(struct tosa_bat *bat) +{ + return gpio_get_value(TOSA_GPIO_JACKET_DETECT) == 0; +} + +static void tosa_bat_external_power_changed(struct power_supply *psy) +{ + schedule_work(&bat_work); +} + +static irqreturn_t tosa_bat_gpio_isr(int irq, void *data) +{ + pr_info("tosa_bat_gpio irq: %d\n", gpio_get_value(irq_to_gpio(irq))); + schedule_work(&bat_work); + return IRQ_HANDLED; +} + +static void tosa_bat_update(struct tosa_bat *bat) +{ + int old; + struct power_supply *psy = &bat->psy; + + mutex_lock(&bat->work_lock); + + old = bat->status; + + if (bat->is_present && !bat->is_present(bat)) { + printk(KERN_NOTICE "%s not present\n", psy->name); + bat->status = POWER_SUPPLY_STATUS_UNKNOWN; + bat->full_chrg = -1; + } else if (power_supply_am_i_supplied(psy)) { + if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) { + gpio_set_value(bat->gpio_charge_off, 0); + mdelay(15); + } + + if (gpio_get_value(bat->gpio_full)) { + if (old == POWER_SUPPLY_STATUS_CHARGING || + bat->full_chrg == -1) + bat->full_chrg = tosa_read_bat(bat); + + gpio_set_value(bat->gpio_charge_off, 1); + bat->status = POWER_SUPPLY_STATUS_FULL; + } else { + gpio_set_value(bat->gpio_charge_off, 0); + bat->status = POWER_SUPPLY_STATUS_CHARGING; + } + } else { + gpio_set_value(bat->gpio_charge_off, 1); + bat->status = POWER_SUPPLY_STATUS_DISCHARGING; + } + + if (old != bat->status) + power_supply_changed(psy); + + mutex_unlock(&bat->work_lock); +} + +static void tosa_bat_work(struct work_struct *work) +{ + tosa_bat_update(&tosa_bat_main); + tosa_bat_update(&tosa_bat_jacket); +} + + +static enum power_supply_property tosa_bat_main_props[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_TECHNOLOGY, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_VOLTAGE_MAX, + POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, + POWER_SUPPLY_PROP_TEMP, + POWER_SUPPLY_PROP_PRESENT, +}; + +static enum power_supply_property tosa_bat_bu_props[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_TECHNOLOGY, + POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, + POWER_SUPPLY_PROP_PRESENT, +}; + +static struct tosa_bat tosa_bat_main = { + .status = POWER_SUPPLY_STATUS_DISCHARGING, + .full_chrg = -1, + .psy = { + .name = "main-battery", + .type = POWER_SUPPLY_TYPE_BATTERY, + .properties = tosa_bat_main_props, + .num_properties = ARRAY_SIZE(tosa_bat_main_props), + .get_property = tosa_bat_get_property, + .external_power_changed = tosa_bat_external_power_changed, + .use_for_apm = 1, + }, + + .gpio_full = TOSA_GPIO_BAT0_CRG, + .gpio_charge_off = TOSA_GPIO_CHARGE_OFF, + + .technology = POWER_SUPPLY_TECHNOLOGY_LIPO, + + .gpio_bat = TOSA_GPIO_BAT0_V_ON, + .adc_bat = WM97XX_AUX_ID3, + .adc_bat_divider = 414, + .bat_max = 4310000, + .bat_min = 1551 * 1000000 / 414, + + .gpio_temp = TOSA_GPIO_BAT1_TH_ON, + .adc_temp = WM97XX_AUX_ID2, + .adc_temp_divider = 10000, +}; + +static struct tosa_bat tosa_bat_jacket = { + .status = POWER_SUPPLY_STATUS_DISCHARGING, + .full_chrg = -1, + .psy = { + .name = "jacket-battery", + .type = POWER_SUPPLY_TYPE_BATTERY, + .properties = tosa_bat_main_props, + .num_properties = ARRAY_SIZE(tosa_bat_main_props), + .get_property = tosa_bat_get_property, + .external_power_changed = tosa_bat_external_power_changed, + }, + + .is_present = tosa_jacket_bat_is_present, + .gpio_full = TOSA_GPIO_BAT1_CRG, + .gpio_charge_off = TOSA_GPIO_CHARGE_OFF_JC, + + .technology = POWER_SUPPLY_TECHNOLOGY_LIPO, + + .gpio_bat = TOSA_GPIO_BAT1_V_ON, + .adc_bat = WM97XX_AUX_ID3, + .adc_bat_divider = 414, + .bat_max = 4310000, + .bat_min = 1551 * 1000000 / 414, + + .gpio_temp = TOSA_GPIO_BAT0_TH_ON, + .adc_temp = WM97XX_AUX_ID2, + .adc_temp_divider = 10000, +}; + +static struct tosa_bat tosa_bat_bu = { + .status = POWER_SUPPLY_STATUS_UNKNOWN, + .full_chrg = -1, + + .psy = { + .name = "backup-battery", + .type = POWER_SUPPLY_TYPE_BATTERY, + .properties = tosa_bat_bu_props, + .num_properties = ARRAY_SIZE(tosa_bat_bu_props), + .get_property = tosa_bat_get_property, + .external_power_changed = tosa_bat_external_power_changed, + }, + + .gpio_full = -1, + .gpio_charge_off = -1, + + .technology = POWER_SUPPLY_TECHNOLOGY_LiMn, + + .gpio_bat = TOSA_GPIO_BU_CHRG_ON, + .adc_bat = WM97XX_AUX_ID4, + .adc_bat_divider = 1266, + + .gpio_temp = -1, + .adc_temp = -1, + .adc_temp_divider = -1, +}; + +static struct { + int gpio; + char *name; + bool output; + int value; +} gpios[] = { + { TOSA_GPIO_CHARGE_OFF, "main charge off", 1, 1 }, + { TOSA_GPIO_CHARGE_OFF_JC, "jacket charge off", 1, 1 }, + { TOSA_GPIO_BAT_SW_ON, "battery switch", 1, 0 }, + { TOSA_GPIO_BAT0_V_ON, "main battery", 1, 0 }, + { TOSA_GPIO_BAT1_V_ON, "jacket battery", 1, 0 }, + { TOSA_GPIO_BAT1_TH_ON, "main battery temp", 1, 0 }, + { TOSA_GPIO_BAT0_TH_ON, "jacket battery temp", 1, 0 }, + { TOSA_GPIO_BU_CHRG_ON, "backup battery", 1, 0 }, + { TOSA_GPIO_BAT0_CRG, "main battery full", 0, 0 }, + { TOSA_GPIO_BAT1_CRG, "jacket battery full", 0, 0 }, + { TOSA_GPIO_BAT0_LOW, "main battery low", 0, 0 }, + { TOSA_GPIO_BAT1_LOW, "jacket battery low", 0, 0 }, + { TOSA_GPIO_JACKET_DETECT, "jacket detect", 0, 0 }, +}; + +#ifdef CONFIG_PM +static int tosa_bat_suspend(struct platform_device *dev, pm_message_t state) +{ + /* flush all pending status updates */ + flush_scheduled_work(); + return 0; +} + +static int tosa_bat_resume(struct platform_device *dev) +{ + /* things may have changed while we were away */ + schedule_work(&bat_work); + return 0; +} +#else +#define tosa_bat_suspend NULL +#define tosa_bat_resume NULL +#endif + +static int __devinit tosa_bat_probe(struct platform_device *dev) +{ + int ret; + int i; + + if (!machine_is_tosa()) + return -ENODEV; + + for (i = 0; i < ARRAY_SIZE(gpios); i++) { + ret = gpio_request(gpios[i].gpio, gpios[i].name); + if (ret) { + i--; + goto err_gpio; + } + + if (gpios[i].output) + ret = gpio_direction_output(gpios[i].gpio, + gpios[i].value); + else + ret = gpio_direction_input(gpios[i].gpio); + + if (ret) + goto err_gpio; + } + + mutex_init(&tosa_bat_main.work_lock); + mutex_init(&tosa_bat_jacket.work_lock); + + INIT_WORK(&bat_work, tosa_bat_work); + + ret = power_supply_register(&dev->dev, &tosa_bat_main.psy); + if (ret) + goto err_psy_reg_main; + ret = power_supply_register(&dev->dev, &tosa_bat_jacket.psy); + if (ret) + goto err_psy_reg_jacket; + ret = power_supply_register(&dev->dev, &tosa_bat_bu.psy); + if (ret) + goto err_psy_reg_bu; + + ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), + tosa_bat_gpio_isr, + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, + "main full", &tosa_bat_main); + if (ret) + goto err_req_main; + + ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), + tosa_bat_gpio_isr, + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, + "jacket full", &tosa_bat_jacket); + if (ret) + goto err_req_jacket; + + ret = request_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT), + tosa_bat_gpio_isr, + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, + "jacket detect", &tosa_bat_jacket); + if (!ret) { + schedule_work(&bat_work); + return 0; + } + + free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket); +err_req_jacket: + free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main); +err_req_main: + power_supply_unregister(&tosa_bat_bu.psy); +err_psy_reg_bu: + power_supply_unregister(&tosa_bat_jacket.psy); +err_psy_reg_jacket: + power_supply_unregister(&tosa_bat_main.psy); +err_psy_reg_main: + + /* see comment in tosa_bat_remove */ + flush_scheduled_work(); + + i--; +err_gpio: + for (; i >= 0; i--) + gpio_free(gpios[i].gpio); + + return ret; +} + +static int __devexit tosa_bat_remove(struct platform_device *dev) +{ + int i; + + free_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT), &tosa_bat_jacket); + free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket); + free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main); + + power_supply_unregister(&tosa_bat_bu.psy); + power_supply_unregister(&tosa_bat_jacket.psy); + power_supply_unregister(&tosa_bat_main.psy); + + /* + * now flush all pending work. + * we won't get any more schedules, since all + * sources (isr and external_power_changed) + * are unregistered now. + */ + flush_scheduled_work(); + + for (i = ARRAY_SIZE(gpios) - 1; i >= 0; i--) + gpio_free(gpios[i].gpio); + + return 0; +} + +static struct platform_driver tosa_bat_driver = { + .driver.name = "wm97xx-battery", + .driver.owner = THIS_MODULE, + .probe = tosa_bat_probe, + .remove = __devexit_p(tosa_bat_remove), + .suspend = tosa_bat_suspend, + .resume = tosa_bat_resume, +}; + +static int __init tosa_bat_init(void) +{ + return platform_driver_register(&tosa_bat_driver); +} + +static void __exit tosa_bat_exit(void) +{ + platform_driver_unregister(&tosa_bat_driver); +} + +module_init(tosa_bat_init); +module_exit(tosa_bat_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Dmitry Baryshkov"); +MODULE_DESCRIPTION("Tosa battery driver"); +MODULE_ALIAS("platform:wm97xx-battery");