1 files changed, 272 insertions, 0 deletions
diff --git a/mtac_xdot.c b/mtac_xdot.c
new file mode 100644
index 0000000..7964f62
--- /dev/null
+++ b/mtac_xdot.c
@@ -0,0 +1,272 @@
+#define DRIVER_VERSION  "v1.0.0"
+#define DRIVER_AUTHOR   "John Klug <john.klug@multitech.com>"
+#define DRIVER_DESC "MTS XDOT (LoRa) Accessory Card"
+#define DRIVER_NAME "mtac-xdot"
+
+#include <linux/types.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/kmod.h>
+#include <linux/bitops.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/mtac.h>
+#include <linux/mts_io.h>
+
+static struct gpio_pin gpio_pins_mtcdt_mtac_xdot[] = {
+	// gpio pins for Accessory Card 1
+	{
+		.name = "AP1_RESET",
+		.pin = {
+			.gpio = AT91_PIN_PB12,
+			.flags = GPIOF_OUT_INIT_HIGH,
+			.label = "ap1-reset",
+		}
+	},
+	
+
+	// gpio pins for Accessory Card 2
+	{
+		.name = "AP2_RESET",
+		.pin = {
+			.gpio = AT91_PIN_PB13,
+			.flags = GPIOF_OUT_INIT_HIGH,
+			.label = "ap2-reset",
+		}
+	},
+	{ },
+};
+
+ssize_t xdot_show_eui(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
+{
+	int retval = -1;
+	int port;
+	int port_index;
+	struct mts_ap_eeprom_layout *app;
+
+
+	port = mtac_port_from_kobject(kobj);
+	if (port < 1) {
+		log_error("mtac_port_from_kobject returned %d", port);
+		return -1;
+	}
+	port_index = port - 1;
+
+	app = (struct mts_ap_eeprom_layout *)mts_ap_eeprom[port_index];
+	if (! strcmp(attr->attr.name, "eui")) {
+		retval = sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n",
+			app->eui[0],
+			app->eui[1],
+			app->eui[2],
+			app->eui[3],
+			app->eui[4],
+			app->eui[5],
+			app->eui[6],
+			app->eui[7]);
+	}
+	return retval;
+}
+
+static char* xdot_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("attribute name [%s] is invalid for XDOT in port %d", name, port);
+				return "";
+			}
+
+		case port_2:
+			if (! strcmp(name, "reset")) {
+				return "ap2-reset";
+			} else {
+				log_error("attribute name [%s] is invalid for XDOT in port %d", name, port);
+				return "";
+			}
+	}
+	return "";
+}
+
+// 1 eui
+// 1 reset
+// 1 vendor-id
+// 1 product-id
+// 1 device-id
+// 1 hw-version
+// NULL
+static size_t ap_xdot_attrs_size = 7;
+
+static bool xdot_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;
+	struct kobject *subdir;
+
+	log_info("loading XDOT accessory card in port %d", port);
+
+	sprintf(buf, "ap%d", port);
+	subdir = kobject_create_and_add(buf, &mts_io_platform_device->dev.kobj);
+	if (! subdir) {
+		log_error("kobject_create_and_add for XDOT in port %d failed", port);
+		return false;
+	}
+
+	mtac_set_port_pins(port_index,gpio_pins_mtcdt_mtac_xdot,subdir);
+
+
+	// create the link to the apX directory this card is in
+	// if we're in the first slot, we get plain "XDOT"
+	// if we're in a different slot, we might need to use "XDOT-2" to differentiate
+	if (port > 1) {
+		for (i = 1; i < port; i++) {
+			if (mtac_port_info[i - 1]) {
+				if (strstr(mtac_port_info[i - 1]->product_id, PRODUCT_ID_MTAC_XDOT)) {
+					count++;
+				}
+			}
+		}
+	}
+	if (count > 0) {
+		sprintf(buf, "xdot-%d", count + 1);
+	} else {
+		sprintf(buf, "xdot");
+	}
+	ret = sysfs_create_link(mtac_port_info[port_index]->subdirs->parent, mtac_port_info[port_index]->subdirs, buf);
+	if (ret) {
+		log_error("failed to link [%s] to [%s], %d", buf, mtac_port_info[port_index]->subdirs->name, ret);
+	}
+
+	attrs = kzalloc(sizeof(struct attribute*) * ap_xdot_attrs_size, GFP_KERNEL);
+	if (! attrs) {
+		log_error("failed to allocate attribute space for port %d", port);
+		return false;
+	}
+	
+	sprintf(buf,"eui");
+	attr = mtac_create_attribute("eui", MTS_ATTR_MODE_RO);
+	if (! attr) {
+		log_error("failed to create attribute [%s] for XDOT in port %d", buf, port);
+		attrs[index] = NULL;
+		mtac_port_info[port_index]->attr_group.attrs = attrs;
+		return false;
+	}
+	attr->show = xdot_show_eui;
+	attrs[index++] = &attr->attr;
+
+	sprintf(buf, "reset");
+	attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RW);
+	if (! attr) {
+		log_error("failed to create attribute [%s] for ETH in port %d", buf, port);
+		kfree(attrs);
+		return false;
+	}
+	mtac_port_info[port_index]->attr_group.attrs = attrs;
+	attr->show = mtac_attr_show_ap_gpio_pin;
+	attr->store = mtac_attr_store_ap_gpio_pin;
+	attrs[index++] = &attr->attr;
+        
+	// add attributes for eeprom contents
+	if (! mtac_add_product_info_attributes(port, attrs, &index)) {
+		log_error("failed to add product info attributes for XDOT in port %d", port);
+		return false;
+	}
+
+	attrs[index] = NULL;
+
+	mtac_port_info[port_index]->attr_group.attrs = attrs;
+	if (sysfs_create_group(mtac_port_info[port_index]->subdirs, &mtac_port_info[port_index]->attr_group)) {
+		log_error("sysfs_create_group failed for XDOT in port %d", port);
+		return false;
+	}
+
+	return true;
+}
+
+static bool xdot_teardown(enum ap port) {
+	int i;
+	int port_index = port - 1;
+	struct attribute **attrs = mtac_port_info[port_index]->attr_group.attrs;
+
+	log_info("unloading XDOT accessory card in port %d", port);
+
+	// clean up allocated memory for attributes
+	for (i = 0; i < ap_xdot_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 (mtac_port_info[port_index]->subdirs) {
+		kobject_put(mtac_port_info[port_index]->subdirs);
+	}
+
+	mtac_clear_port_pins(port_index);
+
+	return true;
+}
+
+void set_xdot_info(struct ap_info* info) {
+	snprintf(info->product_id, 32, "%s", PRODUCT_ID_MTAC_XDOT);
+	info->setup = &xdot_setup;
+	info->teardown = &xdot_teardown;
+	info->gpio_pin_name_by_attr_name = &xdot_gpio_pin_name_by_attr_name;
+}
+
+/*
+ * Loop through all the slots, and set up the
+ * mtac-xdot driver for all slots.
+ */
+static int __init mtac_xdot_init(void)
+{
+	int slot_count = 0;
+
+	slot_count = mtac_find(set_xdot_info,PRODUCT_ID_MTAC_XDOT);
+
+	if (slot_count < 1) {
+		log_debug("No MTAC XDOT found");
+		if (slot_count < 0)
+			return slot_count;
+		else
+			return -ENXIO;
+
+	}
+
+	return 0;
+}
+/* We can only tear down our own device */
+static void __exit mtac_xdot_exit(void)
+{
+	int port_index;
+	struct mts_ap_eeprom_layout *app;
+	
+	for (port_index = 0; port_index < NUM_AP; port_index++) {
+		app = (struct mts_ap_eeprom_layout *)mts_ap_eeprom[port_index];
+        if (app && strstr(app->product_id, PRODUCT_ID_MTAC_XDOT)) {
+			if (mtac_port_info[port_index]->setup == &xdot_setup) {
+				mtac_port_info[port_index]->teardown(port_index+1);
+				kfree(mtac_port_info[port_index]);
+			}
+        }
+    }
+	log_info("exiting");
+}
+
+module_init(mtac_xdot_init);
+module_exit(mtac_xdot_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");