wmbattery/sonypi.c

   1 #include <stdio.h>
   2 #ifdef __sun
   3 #include <sys/filio.h>
   4 #include <sys/sockio.h>
   5 #endif
   6 #include <sys/ioctl.h>
   7 #include "apm.h"
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <fcntl.h>
  11 #include <stdint.h>
  12 #include <unistd.h>
  13
  14 #include "sonypi.h"
  15
  16 signed int spicfd = -1;
  17
  18 int sonypi_supported(void)
  19 {
  20         spicfd = open("/dev/sonypi", O_RDWR);
  21         if (spicfd == -1)
  22                 return 0;
  23         else
  24                 return 1;
  25 }
  26
  27 inline int sonypi_ioctl(int ioctlno, void *param)
  28 {
  29         if (ioctl(spicfd, ioctlno, param) < 0)
  30                 return 0;
  31         else
  32                 return 1;
  33 }
  34
  35 /* Read battery info from sonypi device and shove it into an apm_info
  36  * struct. */
  37 int sonypi_read(apm_info *info)
  38 {
  39         uint8_t batflags;
  40         uint16_t cap, rem;
  41         int havebatt = 0;
  42
  43         info->using_minutes = info->battery_flags = 0;
  44
  45         if (!sonypi_ioctl(SONYPI_IOCGBATFLAGS, &batflags))
  46                 return 1;
  47
  48         info->ac_line_status = (batflags & SONYPI_BFLAGS_AC) != 0;
  49         if (batflags & SONYPI_BFLAGS_B1) {
  50                 if (!sonypi_ioctl(SONYPI_IOCGBAT1CAP, &cap))
  51                         return 1;
  52                 if (!sonypi_ioctl(SONYPI_IOCGBAT1REM, &rem))
  53                         return 1;
  54                 havebatt = 1;
  55         } else if (batflags & SONYPI_BFLAGS_B2) {
  56                 /* Not quite right, if there is a second battery I should
  57                  * probably merge the two somehow.. */
  58                 if (!sonypi_ioctl(SONYPI_IOCGBAT2CAP, &cap))
  59                         return 1;
  60                 if (!sonypi_ioctl(SONYPI_IOCGBAT2REM, &rem))
  61                         return 1;
  62                 havebatt = 1;
  63         } else {
  64                 info->battery_percentage = 0;
  65                 info->battery_status = BATTERY_STATUS_ABSENT;
  66         }
  67
  68         if (havebatt) {
  69                 info->battery_percentage = 100 * rem / cap;
  70                 /* Guess at whether the battery is charging. */
  71                 if (info->battery_percentage < 99 && info->ac_line_status == 1) {
  72                         info->battery_flags = info->battery_flags | BATTERY_FLAGS_CHARGING;
  73                         info->battery_status = BATTERY_STATUS_CHARGING;
  74                 }
  75         }
  76
  77         /* Sadly, there is no way to estimate this. */
  78         info->battery_time = 0;
  79
  80         return 0;
  81 }