From b2bd8a3bcdd18101eb5d85c267c1a1fb8ce9acc7 Mon Sep 17 00:00:00 2001 From: Andres Salomon Date: Fri, 2 May 2008 13:41:59 -0700 Subject: 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(-) (limited to 'drivers') 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); -- cgit v1.2.3