From 390e66bc2d925669451ece6ce01091792da46634 Mon Sep 17 00:00:00 2001 From: reinelt Date: Sat, 10 Jan 2004 17:36:56 +0000 Subject: [lcd4linux @ 2004-01-10 17:36:56 by reinelt] I2C Sensors plugin from Xavier added git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@302 3ae390bd-cb1e-0410-b409-cd5a39f66f1f --- plugin_i2c_sensors.c | 189 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 189 insertions(+) create mode 100644 plugin_i2c_sensors.c (limited to 'plugin_i2c_sensors.c') diff --git a/plugin_i2c_sensors.c b/plugin_i2c_sensors.c new file mode 100644 index 0000000..f6bd574 --- /dev/null +++ b/plugin_i2c_sensors.c @@ -0,0 +1,189 @@ +/* $Id: plugin_i2c_sensors.c,v 1.1 2004/01/10 17:36:56 reinelt Exp $ + * + * I2C sensors plugin + * + * Copyright 2003,2004 Xavier Vello + * + * This file is part of LCD4Linux. + * + * LCD4Linux 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, or (at your option) + * any later version. + * + * LCD4Linux 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. + * + * + * $Log: plugin_i2c_sensors.c,v $ + * Revision 1.1 2004/01/10 17:36:56 reinelt + * + * I2C Sensors plugin from Xavier added + * + * + */ + +/* + * exported functions: + * + * int plugin_init_i2c_sensors (void) + * adds function i2c_sensors() to retrieve informations from + * the i2c sensors via the sysfs interface of 2.6.x kernels + * + * -- WARNING -- + * This plugin is only for kernel series 2.5/2.6 and higher ! + * It uses the new sysfs pseudo-filesystem that you can mount with: + * mount -t sysfs none /sys + * + * -- WARNING #2 -- + * This plugin should detect where your sensors are at startup. + * If you can't get any token to work, ensure you don't get + * an error message with "lcd4linux -F". + * + * If so, try to force the path to your sensors in the conf like this : + * i2c_sensors.path /sys/bus/i2c/devices/0-6000/ + * + * - replace 0-6000 with the appropriate dir + * - DON'T forget the trailing slash or it won't work ! + * + */ + + +#include +#include +#include +#include +#include +#include + +#include "debug.h" +#include "plugin.h" +#include "cfg.h" + +static char *path=NULL; + +static void my_i2c_sensors (RESULT *result, RESULT *arg) +{ + int fd=-2; + double value; + char buffer[32]; + char *key=R2S(arg); + char *file; + + // construct absolute path to the file to read + // Fixme: MR: free the path again?? + file = strdup(path); + file = realloc(file, strlen(path)+strlen(key)+1); + file = strcat(file, key); + + // read of file to buffer + fd = open(file, O_RDONLY); + read (fd, &buffer, 31); + close(fd); + + if (!buffer) { + SetResult(&result, R_STRING, "??"); + return; + } + + // now the formating stuff, depending on the file wanted + if (!strncmp(key, "temp_", 5) || + !strncmp(key, "curr_", 5) || + !strncmp(key, "in_", 3) || + !strncmp(key, "vid", 3)) { + value = strtod(buffer, NULL); + value /= 1000.0; + if (value) { + SetResult(&result, R_NUMBER, &value); + return; + } + + } else if (!strncmp(key, "fan_", 4) || + !strncmp(key, "pwn_", 4) || + !strncmp(key, "vrm", 5)) { + value = strtod(buffer, NULL); + if (value) { + SetResult(&result, R_NUMBER, &buffer); + return; + } + + } else { + SetResult(&result, R_STRING, &buffer); + return; + } + + // fallback is there's a problem + SetResult(&result, R_STRING, "??"); +} + + +void my_i2c_sensors_path(void) +{ + struct dirent *dir; + struct dirent *file; + char *base="/sys/bus/i2c/devices/"; + char dname[64]; + DIR *fd1; + DIR *fd2; + int done; + + fd1 = opendir(base); + while((dir = readdir(fd1))) { + // Skip '.' and '..' + if (strcmp(dir->d_name, "." )==0 || + strcmp(dir->d_name, "..")==0) { + continue; + } + + // dname is the absolute path + strcpy(dname, base); + strcat(dname, dir->d_name); + strcat(dname, "/"); + + fd2 = opendir(dname); + done = 0; + while((file = readdir(fd2))) { + if (!strcmp(file->d_name, "temp_input1")) { // FIXME : do all sensors have a temp_input1 ? + path = realloc(path, strlen(dname)); + strcpy(path, dname); // we've got it ;) + done=1; + break; + } + } + closedir(fd2); + if (done) break; + } + closedir(fd1); + + // fallback is path undefined + if (*path != '/') { + error("[i2c_sensors] No i2c sensors found via the i2c interface !"); + error("[i2c_sensors] Try to specify the path to the sensors !"); + } +} + + +int plugin_init_i2c_sensors (void) +{ + // char *path_cfg=cfg_get(NULL, "i", ""); + // printf("%s\n", path_cfg); + // if (strncmp(path_cfg, "/", 1)) { + // printf("%s\n", "Calling my_i2c_sensors_path()"); + my_i2c_sensors_path(); + // } else { + // path = realloc(path, strlen(path_cfg)+1); + // strcpy(path, path_cfg); + // } + + AddFunction ("i2c_sensors", 1, my_i2c_sensors); + + printf("%s\n", path); + return 0; +} + -- cgit v1.2.3