FreeCalypso > hg > freecalypso-tools

annotate loadtools/gtapower.c @ 220:5c78f132547c

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rvinterf/include/exitcodes.h: added ERROR_RFTEST for use by autocal tools
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 20 May 2017 19:57:49 +0000
parents e7502631a0f9
children
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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 }