1 files changed, 114 insertions, 0 deletions
diff --git a/io-module/mts_lora.c b/io-module/mts_lora.c
new file mode 100644
index 0000000..7b7e204
--- /dev/null
+++ b/io-module/mts_lora.c
@@ -0,0 +1,114 @@
+static struct kobject *mts_lora_kobject;
+
+static void mts_load_lora_port(void)
+{
+	// create lora/ subdir
+	mts_lora_kobject = kobject_create_and_add("lora", &mts_io_platform_device->dev.kobj);
+
+	if (sysfs_create_group(mts_lora_kobject, attr_group_lora)) {
+		log_error("failed to create lora attributes");
+	}
+}
+
+static void	mts_teardown_lora_port(void)
+{
+	// clean up "lora/" kobject if it exists
+	if (mts_lora_kobject) {
+		kobject_put(mts_lora_kobject);
+	}
+}
+
+static ssize_t mts_attr_show_lora_product_info(struct kobject *kobj,
+			struct kobj_attribute *attr, char *buf)
+{
+	ssize_t value;
+
+	char label[32];
+	snprintf(label, sizeof label, "%s/%s", kobj->name, attr->attr.name);
+
+	if (strcmp(label, "lora/eui") == 0) {
+			value = sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n",
+				id_eeprom.lora_eui[0],
+				id_eeprom.lora_eui[1],
+				id_eeprom.lora_eui[2],
+				id_eeprom.lora_eui[3],
+				id_eeprom.lora_eui[4],
+				id_eeprom.lora_eui[5],
+				id_eeprom.lora_eui[6],
+				id_eeprom.lora_eui[7]);
+	}
+	else if (strcmp(label, "lora/product-id") == 0) {
+		value = sprintf(buf, "%.32s\n", id_eeprom.lora_product_id);
+	}
+	else if (strcmp(label, "lora/hw-version") == 0) {
+		value = sprintf(buf, "%.32s\n", id_eeprom.lora_hw_version);
+	}
+	else {
+		log_error("attribute '%s' not found", label);
+		value = -1;
+	}
+	return value;
+}
+
+static ssize_t mts_attr_show_lora_gpio_pin(struct kobject *kobj,
+			struct kobj_attribute *attr,
+			char *buf)
+{
+	int value;
+	struct gpio_pin *pin;
+
+	char pin_label[32];
+	snprintf(pin_label, sizeof pin_label, "%s/%s", kobj->name, attr->attr.name); // ex. lora/reset
+
+	pin = gpio_pin_by_attr_name(pin_label);
+	if (!pin) {
+		return -ENODEV;
+	}
+
+	mutex_lock(&mts_io_mutex);
+
+	value = gpio_get_value(pin->pin.gpio);
+
+	mutex_unlock(&mts_io_mutex);
+
+	if (value < 0) {
+		return value;
+	}
+
+	if (pin->active_low) {
+		value = !value;
+	}
+
+	return sprintf(buf, "%d\n", value);
+}
+
+static ssize_t mts_attr_store_lora_gpio_pin(struct kobject *kobj,
+		struct kobj_attribute *attr, const char *buf, size_t count)
+{
+	int value;
+	struct gpio_pin *pin;
+	char pin_label[32];
+
+	snprintf(pin_label, sizeof pin_label, "%s/%s", kobj->name, attr->attr.name); // ex. lora/reset
+
+	pin = gpio_pin_by_attr_name(pin_label);
+	if (!pin) {
+		return -ENODEV;
+	}
+
+	if (sscanf(buf, "%i", &value) != 1) {
+		return -EINVAL;
+	}
+
+	if (pin->active_low) {
+		value = !value;
+	}
+
+	mutex_lock(&mts_io_mutex);
+
+	gpio_set_value(pin->pin.gpio, value);
+
+	mutex_unlock(&mts_io_mutex);
+
+	return count;
+}