FreeCalypso > hg > freecalypso-tools
view loadtools/gtapower.c @ 345:cc207d81c05f
fcup-atinterf: implemented wakeup of sleeping targets
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 04 Feb 2018 16:05:11 +0000 |
parents | e7502631a0f9 |
children |
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/* * This module is included only when loadtools are being built to run on the * GTA0x application processor (AP). It provides automated modem power * control, i.e., coordinates modem power control with loadtools operations * for convenience. */ #include <sys/types.h> #include <sys/file.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> /* * Check this pathname: it is correct for the kernel version I'm using * on my test GTA02, but it differs for some other kernel versions. */ static char modem_powerctl_pathname[] = "/sys/bus/platform/devices/gta02-pm-gsm.0/power_on"; void set_gta_modem_power_ctrl(boolval) { char strbuf[16]; int len, fd; len = sprintf(strbuf, "%d\n", boolval); fd = open(modem_powerctl_pathname, O_WRONLY); if (fd < 0) { perror(modem_powerctl_pathname); exit(1); } write(fd, strbuf, len); close(fd); } void fork_gta_modem_poweron() { int i; i = fork(); if (i < 0) { perror("fork"); exit(1); } if (i) return; printf("Toggling %s\n", modem_powerctl_pathname); set_gta_modem_power_ctrl(0); usleep(350000); set_gta_modem_power_ctrl(1); exit(0); }