X-Git-Url: https://git.wpitchoune.net/gitweb/?p=psensor.git;a=blobdiff_plain;f=src%2Flib%2Fbcm2835.c;fp=src%2Flib%2Fbcm2835.c;h=efc8854a46b746a403027581b3daa15190c00af2;hp=0000000000000000000000000000000000000000;hb=ca30742ed33315bdd0620d7a6ef417ab7405a0ba;hpb=a2bce14963ee379e9f5b5e745304129b651e7352

diff --git a/src/lib/bcm2835.c b/src/lib/bcm2835.c
new file mode 100644
index 0000000..efc8854
--- /dev/null
+++ b/src/lib/bcm2835.c
@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 2017 jeanfi@gmail.com
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+#include <locale.h>
+#include <libintl.h>
+#define _(str) gettext(str)
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <bool.h>
+#include <pio.h>
+#include <bcm2835.h>
+
+/* Support of the BCM2835 chip which is mostly used by by the
+ * Raspberry PI3 and provides the temperature of the chip. */
+static const char *PROVIDER_NAME = "BCM2835";
+
+/*
+ * If this file exists and contains bcm2835_thermal it can be assumed
+ * that a BCM2835 chip is present.
+ */
+static const char *SYS_THERMAL_TYPE = "/sys/class/thermal/thermal_zone0/type";
+static const char *BCM2835_TYPE = "bcm2835_thermal";
+/* this file contains the temperature of the chip in celcius * 1000 */
+static char *SYS_THERMAL_TEMP = "/sys/class/thermal/thermal_zone0/temp";
+
+static void log_provider_info(const char *str)
+{
+	log_info("%s: %s", PROVIDER_NAME, str);
+}
+
+static bool is_bcm2835_present(void)
+{
+	bool ret;
+	char *str;
+
+	ret = is_file(SYS_THERMAL_TYPE);
+
+	if (!ret) {
+		log_debug("%s: %s does not exist.",
+			  PROVIDER_NAME,
+			  SYS_THERMAL_TYPE);
+		return false;
+	}
+
+	str = file_get_content(SYS_THERMAL_TYPE);
+
+	if (!str || strncmp(str, BCM2835_TYPE, strlen(BCM2835_TYPE) - 1)) {
+		log_debug("%s: type: %s.", PROVIDER_NAME, str);
+		ret = false;
+	} else {
+		ret = true;
+	}
+
+	if (str)
+		free(str);
+
+	return ret;
+}
+
+void bcm2835_psensor_list_append(struct psensor ***sensors, int vl)
+{
+	struct psensor *p;
+
+	log_fct_enter();
+
+	if (is_bcm2835_present()) {
+		log_provider_info(_("The BCM2835 (probably a Raspberry PI3) "
+				    "has been detected"));
+
+		p = psensor_create(strdup(PROVIDER_NAME),
+				   strdup(PROVIDER_NAME),
+				   strdup(PROVIDER_NAME),
+				   SENSOR_TYPE_BCM2835 | SENSOR_TYPE_TEMP,
+				   vl);
+
+		psensor_list_append(sensors, p);
+	} else {
+		log_provider_info("The BCM2835 has not been detected.");
+	}
+
+	log_fct_exit();
+}
+
+static double bcm2835_update_temp(struct psensor *s)
+{
+	char *str, *end;
+	long l;
+	
+	log_fct_enter();
+
+	str = file_get_content(SYS_THERMAL_TEMP);
+
+	if (str[strlen(str) - 1] == '\n')
+		str[strlen(str) - 1] = '\0';
+
+	if (str) {
+		l = strtol(str, &end, 10);
+		if (*end != '\0')
+			log_debug("%s: found invalid value: A%sB %d.", PROVIDER_NAME, str, strlen(str));
+		else
+			psensor_set_current_value(s, l / 1000);
+		free(str);
+	} else {
+		log_err(_("Failed to get content of file %s."), SYS_THERMAL_TEMP);
+	}
+		
+	log_fct_exit();
+
+	return 0;
+}
+
+void bcm2835_psensor_list_update(struct psensor **sensors)
+{
+	struct psensor *s;
+	
+	log_fct_enter();
+
+	for (; *sensors; sensors++) {
+		s = *sensors;
+
+		if (s->type & SENSOR_TYPE_REMOTE)
+			continue;
+
+		if (s->type & SENSOR_TYPE_BCM2835) {
+			bcm2835_update_temp(s);
+			break; /* only one possible sensor */
+		}
+	}
+	
+	log_fct_exit();
+}