FreeCalypso > hg > freecalypso-tools
annotate loadtools/gtapower.c @ 2:803e4f4a3db6
CHANGES file added, following fc-host-tools releases
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 11 Jun 2016 01:23:37 +0000 |
parents | e7502631a0f9 |
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rev | line source |
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1 /* |
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2 * This module is included only when loadtools are being built to run on the |
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3 * GTA0x application processor (AP). It provides automated modem power |
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4 * control, i.e., coordinates modem power control with loadtools operations |
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5 * for convenience. |
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6 */ |
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7 |
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8 #include <sys/types.h> |
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9 #include <sys/file.h> |
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10 #include <stdio.h> |
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11 #include <stdlib.h> |
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12 #include <unistd.h> |
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13 |
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14 /* |
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15 * Check this pathname: it is correct for the kernel version I'm using |
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16 * on my test GTA02, but it differs for some other kernel versions. |
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17 */ |
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18 static char modem_powerctl_pathname[] = |
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19 "/sys/bus/platform/devices/gta02-pm-gsm.0/power_on"; |
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20 |
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21 void |
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22 set_gta_modem_power_ctrl(boolval) |
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23 { |
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24 char strbuf[16]; |
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25 int len, fd; |
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26 |
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27 len = sprintf(strbuf, "%d\n", boolval); |
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28 fd = open(modem_powerctl_pathname, O_WRONLY); |
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29 if (fd < 0) { |
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30 perror(modem_powerctl_pathname); |
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31 exit(1); |
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32 } |
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33 write(fd, strbuf, len); |
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34 close(fd); |
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35 } |
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36 |
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37 void |
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38 fork_gta_modem_poweron() |
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39 { |
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40 int i; |
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41 |
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42 i = fork(); |
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43 if (i < 0) { |
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44 perror("fork"); |
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45 exit(1); |
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46 } |
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47 if (i) |
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48 return; |
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49 printf("Toggling %s\n", modem_powerctl_pathname); |
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50 set_gta_modem_power_ctrl(0); |
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51 usleep(350000); |
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52 set_gta_modem_power_ctrl(1); |
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53 exit(0); |
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54 } |