#!/bin/bash
# NEEDS BASH! won't run on busybox, sorry
# v1.2 (c) 2009 2011-10-20 DocScrutinizer
#
# this script decodes the smartbattery BQ27000 Coulomb-Counter
# v1.2 tries to deal with sysfs path changes on OM kernels, and supports N900 directly

if [ x$BASH_VERSION = x ]; then
  echo "no bash detected, aborting"
  exit 5
fi

#set -v -x
set -ehu


pv() {
# print value, in: byte(s)-hex NN [NN], out: dezimal 5 digits unsigned 0..65535
local i
local v
while [ $# -gt 0 ]; do
 v=$(( $1 ))
 i=$(( (i * 0x100) + 0x${dmp[$v]} ))
 shift
done
printf %5d "$i"
}




printdetail() {

echo   "                                      RAM Registers"
echo "   0x00:      0x${dmp[0]}"     " CTRL Device Control Register                                     R/W"
echo "   0x01:      0x${dmp[1]}"     " MODE Device Mode Register                                        R/W"
echo "0x03 - 0x02: `pv 0x03 0x02`"   "   AR At-Rate High - Low Byte (user writes here)    3.57 µV (1)   R/W"
echo "0x05 - 0x04: `pv 0x05 0x04`"   "ARTTE At-Rate Time-to-Empty High - Low Byte           Minutes      R"
echo "0x07 - 0x06: `pv 0x07 0x06`"   " TEMP Reported Temperature High - Low Byte            0.25 °K      R"
  local milliC=$(( `pv 0x07 0x06` * 250 - 273150))  
  local C=$(( milliC / 1000 ))  
  local Cdecimals=$(( milliC - ( C * 1000 ) ))
  local F=$(( ( milliC * 18 + 320000 ) / 10000 ))
echo "                      /4 - 273.15 = ${C}.${Cdecimals}°C, ${F}°F"
echo "0x09 - 0x08: `pv 0x09 0x08`"   " VOLT Reported Voltage High - Low Byte                  mV         R"
echo "   0x0A:      0x${dmp[0x0A]}"    "FLAGS Status Flags                                                 R"
echo "                 $(( (0x${dmp[0x0A]} & 2#10000000)?1:0 )) CHGS  Charge State flag. A 1 in the CHGS indicates a charge current (VSRP > VSRN). Charging."
echo "                 $(( (0x${dmp[0x0A]} & 2#01000000)?1:0 )) NOACT No Activity flag. A 1 indicates that the voltage across RS is ~0. Neither charge nor discharge."
echo "                 $(( (0x${dmp[0x0A]} & 2#00100000)?1:0 )) IMIN  Li-ion taper current detection flag. A 1 indicates that the charge ... is considered finished."
echo "                 $(( (0x${dmp[0x0A]} & 2#00010000)?1:0 )) CI    Capacity Inaccurate flag. A 1 indicates no valid learning cycle."
echo "                 $(( (0x${dmp[0x0A]} & 2#00001000)?1:0 )) CALIP Offset Calibration-In-Progress flag."
echo "                 $(( (0x${dmp[0x0A]} & 2#00000100)?1:0 )) VDQ   Valid Discharge flag. Learning cycle in progress."
echo "                 $(( (0x${dmp[0x0A]} & 2#00000010)?1:0 )) EDV1  First End-of-Discharge-Voltage flag. A 1 indicates that voltage < EDV1"
echo "                 $(( (0x${dmp[0x0A]} & 2#00000001)?1:0 )) EDVF  Final End-of-Discharge-Voltage flag. A 1 indicates that the battery has discharged to the empty capacity threshold."

echo "   0x0B:     `pv 0x0B`"        " RSOC Relative State-of-Charge                           %         R"
echo "0x0D - 0x0C: `pv 0x0D 0x0C`"   "  NAC Nominal Available Capacity High - Low Byte   3.57 µVh (1)    R"
echo "                    *3.57 / 20 = " $(( `pv 0x0D 0x0C` * 179 / 1000)) "mAh"
echo "0x0F - 0x0E: `pv 0x0F 0x0E`"   " CACD Discharge Compensated NAC High - Low Byte    3.57 µVh (1)    R"
echo "                    *3.57 / 20 = " $(( `pv 0x0F 0x0E` * 179 / 1000)) "mAh"
echo "0x11 - 0x10: `pv 0x11 0x10`"   " CACT Temperature Compensated CACD High - Low Byte 3.57 µVh (1)    R"
echo "                    *3.57 / 20 = " $(( `pv 0x11 0x10` * 179 / 1000)) "mAh"
echo "0x13 - 0x12: `pv 0x13 0x12`"   "  LMD Last Measured Discharge High - Low Byte      3.57 µVh (1)    R"
echo "                    *3.57 / 20 = " $(( `pv 0x13 0x12` * 179 / 1000)) "mAh"
echo "0x15 - 0x14: `pv 0x15 0x14`"   "   AI Average Current High - Low Byte               3.57 µV (1)    R"
echo "                    *3.57 / 20 = " $(( `pv 0x15 0x14` * 179 / 1000)) "mA "
echo "0x17 - 0x16: `pv 0x17 0x16`"   "  TTE Time-to-Empty High - Low Byte                   Minutes      R"
echo "0x19 - 0x18: `pv 0x19 0x18`"   "  TTF Time-to-Full High - Low Byte                    Minutes      R"
echo "0x1B - 0x1A: `pv 0x1B 0x1A`"   "   SI Standby Current High - Low Byte               3.57 µV (1)    R"
echo "                    *3.57 / 20 = " $(( `pv 0x1B 0x1A` * 179 / 1000)) "mA "
echo "0x1D - 0x1C: `pv 0x1D 0x1C`"   " STTE Standby Time-to-Empty High - Low Byte           Minutes      R"
echo "0x1F - 0x1E: `pv 0x1F 0x1E`"   "  MLI Max Load Current High - Low Byte              3.57 µV (1)    R"
echo "                    *3.57 / 20 = " $(( `pv 0x1F 0x1E` * 179 / 1000)) "mA "
echo "0x21 - 0x20: `pv 0x21 0x20`"   "MLTTE Max Load Time-to-Empty High - Low Byte          Minutes      R"
echo "0x23 - 0x22: `pv 0x23 0x22`"   "  SAE Available Energy High - Low Byte             29.2  µV2h (2)  R"
echo "                    *29.2 / 20 = " $(( `pv 0x23 0x22` * 146 / 100)) "mWh "
echo "0x25 - 0x24: `pv 0x25 0x24`"   "   AP Average Power High - Low Byte                29.2 µV2 (2)    R"
echo "                    *29.2 / 20 = " $(( `pv 0x25 0x24` * 146 / 100)) "mW "

echo "0x27 - 0x26: `pv 0x27 0x26`"   " TTECP Time-to-Empty At Constant Power High-Low Byte  Minutes      R"
echo "0x29 - 0x28: `pv 0x29 0x28`"   " CYCL Cycle Count Since Learning Cycle High-Low Byte  Cycles       R"
echo "0x2B - 0x2A: `pv 0x2B 0x2A`"   " CYCT Cycle Count Total High - Low Byte               Cycles       R"
echo "   0x2C:     `pv 0x2C`"        " CSOC Compensated State-of-Charge                        %         R"
echo 
}
#

printstatic() {
echo "EEPROM Registers"
echo "0x2D - 0x6D     - RESERVED                                                            R"
echo "   0x6E:     `pv 0x6E`"        "EE_EN EEPROM Program Enable                                       R/W"
echo "0x6F - 0x75     - RESERVED                                                            R"
echo "   0x76:     `pv 0x76`"        " ILMD Initial Last Measured Discharge High Byte     914  µVh (1)  R/W"
echo "                    *0x100 * 3.57 / 20 = " $(( `pv 0x76 0x00` * 179 / 1000)) "mAh fabcoded cell capacity"
echo "   0x77:     `pv 0x77`"        "SEDVF Scaled EDVF Threshold                                       R/W"
echo "                    +0x100)*8 = " $(( (`pv 0x77` + 0x100) * 8)) "mV (@ 0%)"
echo "   0x78:     `pv 0x78`"        "SEDV1 Scaled EDV1 Threshold                                       R/W"
echo "                    +0x100)*8 = " $(( (`pv 0x78` + 0x100) * 8)) "mV (@ 6.25%)"
echo "   0x79:     `pv 0x79`"        " ISLC Initial Standby Load Current                  7.14 µV (1)   R/W"
echo "                    *7.14 / 20 = " $(( `pv 0x79` * 714 / 2000)) "mA "
echo "   0x7A:     `pv 0x7A`"        "DMFSD Digital Magnitude Filter and Self-Discharge Rate Constants  R/W"
echo "   0x7B:     `pv 0x7B`"        "TAPER Aging Estimate Enable, Charge Termin. Taper I  228 µV (1)   R/W"
echo "   0x7C:     `pv 0x7C`"        "PKCFG Pack Configuration Values                                   R/W"
echo "   0x7D:     `pv 0x7D`"        " IMLC Initial Max Load Current, OR, ID#3             457  µV (1)  R/W"
echo "   0x7E:     `pv 0x7E`"        "DCOMP Discharge Rate Compensation Constants, OR, ID#2             R/W"
echo "   0x7F:     `pv 0x7F`"        "TCOMP Temperature Compensation Constants, OR, ID#1                R/W"
echo
echo "(1) Divide by Rs in milliohms to convert µV to mA or µVh to mAh.  "
echo "(2) Divide by Rs in milliohms to convert µV2 to mW or µV2h to mWh."
echo "Rs=20mOhm"
}




#main
dmppath=`find /sys/devices/ -path '*/hdq/*' -name dump`
if [ x$dmppath != x ]; then
  dmpcmd="cat ${1:-${dmppath}}| tr -s '\n ' '  '"
else
  dmpcmd="i2cdump -y 2 0x55 b|tail -n +2|cut -d ' ' -f 2-17"
fi

declare -a dmp
#dmp=(`cat ${1:-/sys/devices/platform/s3c24xx_pwm.0/hdq.0/hdq/dump}| tr -s '\n ' '  '`)
dmp=(`eval $dmpcmd`)
printdetail
printstatic