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/*
*
* Copyright 2014-present Facebook. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <syslog.h>
#include "alert_control.h"
#define PATH_ALERT_STATUS "/sys/bus/i2c/drivers/panther_plus/4-0040/alert_status"
#define PATH_ALERT_CONTROL "/sys/bus/i2c/drivers/panther_plus/4-0040/alert_control"
#define MASK_ALERT_SMS_KCS 0x01
/*
* Function to enable/disable alert signal generation for a given Function Block
*/
int
alert_control(e_fbid_t id, e_flag_t cflag) {
FILE *fp;
unsigned char rbuf[5] = {0};
unsigned char tbuf[3] = {0};
int count = 0;
fp = fopen(PATH_ALERT_CONTROL, "r+");
if (!fp) {
return -1;
}
count = fread(rbuf, sizeof(unsigned char), sizeof(rbuf), fp);
if (count == 0x0) {
fclose(fp);
return -1;
}
// Size of the request
tbuf[0] = 0x02;
switch(id) {
case FBID_SMS_KCS:
if (cflag == FLAG_ENABLE)
tbuf[1] = rbuf[2] | (0x01 << FBID_SMS_KCS);
else
tbuf[1] = rbuf[2] & (~(0x01 << FBID_SMS_KCS));
tbuf[2] = rbuf[3];
break;
// TODO: Add logic for other Function Blocks here
default:
tbuf[0] = rbuf[2];
tbuf[1] = rbuf[3];
break;
}
count = fwrite(tbuf, sizeof(unsigned char), sizeof(tbuf), fp);
if (count != sizeof(tbuf)) {
fclose(fp);
return (-1);
}
fclose(fp);
return 0;
}
/*
* Function to check if the alert for a given Function Block is asserted or not
*/
bool
is_alert_present(e_fbid_t id) {
FILE *fp;
unsigned char buf[5] = {0};
int count = 0;
fp = fopen(PATH_ALERT_STATUS, "r");
if (!fp) {
return false;
}
count = fread(buf, sizeof(unsigned char), sizeof(buf), fp);
if (count == 0x0) {
fclose(fp);
sleep(2);
return false;
}
fclose(fp);
switch(id) {
case FBID_SMS_KCS:
if (buf[2] & (0x01 << FBID_SMS_KCS))
return true;
else
return false;
//TODO: Add logic for other Function Blocks here
default:
return false;
}
}
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