1 files changed, 137 insertions, 0 deletions
diff --git a/io-module/mtac_lora.c b/io-module/mtac_lora.c
new file mode 100644
index 0000000..b546003
--- /dev/null
+++ b/io-module/mtac_lora.c
@@ -0,0 +1,137 @@
+static char* lora_gpio_pin_name_by_attr_name(const char* name, int port) {
+	switch (port) {
+		case port_1:
+			if (! strcmp(name, "reset")) {
+				return "ap1-reset";
+			} else {
+				log_error("attirbute name [%s] is invalid for LORA in port %d", name, port);
+				return "";
+			}
+
+		case port_2:
+			if (! strcmp(name, "reset")) {
+				return "ap2-reset";
+			} else {
+				log_error("attirbute name [%s] is invalid for LORA in port %d", name, port);
+				return "";
+			}
+	}
+}
+
+// 1 reset
+// 1 vendor-id
+// 1 product-id
+// 1 device-id
+// 1 hw-version
+// NULL
+static size_t ap_lora_attrs_size = 6;
+
+static bool lora_setup(enum ap port) {
+	int i;
+	int port_index = port - 1;
+	int index = 0;
+	int count = 0;
+	int ret;
+	char buf[32];
+	struct kobj_attribute* attr;
+	struct attribute **attrs;
+
+	log_info("loading LORA accessory card in port %d", port);
+
+	sprintf(buf, "ap%d", port);
+	ap_subdirs[port_index] = kobject_create_and_add(buf, &mts_io_platform_device->dev.kobj);
+	if (! ap_subdirs[port_index]) {
+		log_error("kobject_create_and_add in port %d failed", port);
+		return false;
+	}
+
+	// create the link to the apX directory this card is in
+	// if we're in the first slot, we get plain "lora"
+	// if we're in a different slot, we might need to use "lora-2" to differentiate
+	if (port > 1) {
+		for (i = 1; i < port; i++) {
+			if (port_info[i - 1]) {
+				if (strstr(port_info[i - 1]->product_id, PRODUCT_ID_MTAC_LORA)) {
+					count++;
+				}
+			}
+		}
+	}
+	if (count > 0) {
+		sprintf(buf, "lora-%d", count + 1);
+	} else {
+		sprintf(buf, "lora");
+	}
+	ret = sysfs_create_link(ap_subdirs[port_index]->parent, ap_subdirs[port_index], buf);
+	if (ret) {
+		log_error("failed to link [%s] to [%s], %d", buf, ap_subdirs[port_index]->name, ret);
+	}
+
+	attrs = kzalloc(sizeof(struct attribute*) * ap_lora_attrs_size, GFP_KERNEL);
+	if (! attrs) {
+		log_error("failed to allocate attribute space for port %d", port);
+		return false;
+	}
+
+	sprintf(buf, "reset");
+	attr = create_attribute(buf, MTS_ATTR_MODE_RW);
+	if (! attr) {
+		log_error("failed to create attribute [%s] for LORA in port %d", buf, port);
+		return false;
+	}
+	attr->show = mts_attr_show_ap_gpio_pin;
+	attr->store = mts_attr_store_ap_gpio_pin;
+	attrs[index++] = &attr->attr;
+
+	// add attributes for eeprom contents
+	if (! ap_add_product_info_attributes(port, MTAC_LORA_0_0, attrs, &index)) {
+		log_error("failed to add product info attributes for LORA in port %d", port);
+		return false;
+	}
+
+	attrs[index] = NULL;
+
+	ap_attr_groups[port_index].attrs = attrs;
+	if (sysfs_create_group(ap_subdirs[port_index], &ap_attr_groups[port_index])) {
+		log_error("sysfs_create_group failed for LORA in port %d", port);
+		return false;
+	}
+
+	return true;
+}
+
+static bool lora_teardown(enum ap port) {
+	int i;
+	int port_index = port - 1;
+	struct attribute **attrs = ap_attr_groups[port_index].attrs;
+
+	log_info("unloading LORA accessory card in port %d", port);
+
+	// clean up allocated memory for attributes
+	for (i = 0; i < ap_lora_attrs_size; i++) {
+		if (attrs[i]) {
+			if (attrs[i]->name)
+				kfree(attrs[i]->name);
+
+			kfree(attrs[i]);
+		}
+	}
+
+	kfree(attrs);
+
+	// clean up our "apX/" kobject if it exists
+	if (ap_subdirs[port_index]) {
+		kobject_put(ap_subdirs[port_index]);
+	}
+
+	return true;
+}
+
+bool set_lora_info(struct ap_info* info) {
+	snprintf(info->product_id, 32, "%s", PRODUCT_ID_MTAC_LORA);
+	info->setup = &lora_setup;
+	info->teardown = &lora_teardown;
+	info->gpio_pin_name_by_attr_name = &lora_gpio_pin_name_by_attr_name;
+
+	return true;
+}