RFC: add LTE atom

new file mode 100644
index 0000000..8d73079
@@ -0,0 +1,69 @@
+/*
+ *
+ *  oFono - Open Source Telephony
+ *
+ *  Copyright (C) 2016  Endocode AG. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  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 St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifndef __OFONO_LTE_H
+#define __OFONO_LTE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <ofono/types.h>
+
+struct ofono_lte;
+
+struct ofono_lte_context_config {
+	char apn[OFONO_GPRS_MAX_APN_LENGTH + 1];
+	enum ofono_gprs_proto proto;
+};
+
+typedef void (*ofono_lte_cb_t)(const struct ofono_error *error, void *data);
+
+struct ofono_lte_driver {
+	const char *name;
+	int (*probe)(struct ofono_lte *lte, void *data);
+	void (*remove)(struct ofono_lte *lte);
+	int (*config)(struct ofono_lte *lte,
+			struct ofono_lte_context_config *config,
+			ofono_lte_cb_t cb, void *data);
+
+};
+
+int ofono_lte_driver_register(const struct ofono_lte_driver *d);
+
+void ofono_lte_driver_unregister(const struct ofono_lte_driver *d);
+
+struct ofono_lte *ofono_lte_create(struct ofono_modem *modem,
+					const char *driver, void *data);
+
+void ofono_lte_register(struct ofono_lte *lte);
+
+void ofono_lte_remove(struct ofono_lte *lte);
+
+void ofono_lte_set_data(struct ofono_lte *lte, void *data);
+
+void *ofono_lte_get_data(struct ofono_lte *lte);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

index 5b37a64..1df47d5 100644
@@ -153,6 +153,7 @@ enum ofono_atom_type {
 	OFONO_ATOM_TYPE_HANDSFREE,
 	OFONO_ATOM_TYPE_SIRI,
 	OFONO_ATOM_TYPE_NETMON,
+	OFONO_ATOM_TYPE_LTE,
 };
 
 enum ofono_atom_watch_condition {

new file mode 100644
index 0000000..cde0496
@@ -0,0 +1,341 @@
+/*
+ *
+ *  oFono - Open Source Telephony
+ *
+ *  Copyright (C) 2016  Endocode AG. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  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 St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include <errno.h>
+
+#include <glib.h>
+#include <gdbus.h>
+
+#include "ofono.h"
+
+#include "common.h"
+#include "log.h"
+#include "gprs-context.h"
+#include "storage.h"
+
+#include "lte.h"
+
+#define SETTINGS_STORE "lte"
+#define SETTINGS_GROUP "Settings"
+
+struct ofono_lte {
+	const struct ofono_lte_driver *driver;
+	void *driver_data;
+	struct ofono_atom *atom;
+	char *imsi;
+	GKeyFile *settings;
+	struct ofono_lte_context_config config;
+};
+
+static GSList *g_drivers = NULL;
+
+static void lte_load_settings(struct ofono_lte *lte)
+{
+	char *apn;
+
+	if (lte->imsi == NULL)
+		return;
+
+	lte->settings = storage_open(lte->imsi, SETTINGS_STORE);
+
+	if (lte->settings == NULL) {
+		ofono_error("LTE: Can't open settings file, "
+				"changes won't be persistent");
+		return;
+	}
+
+	apn = g_key_file_get_string(lte->settings, SETTINGS_GROUP ,
+					"DefaultAPN", NULL);
+	if (apn) {
+		strcpy(lte->config.apn, apn);
+
+		if (lte->driver)
+			lte->driver->config(lte, &lte->config, NULL, NULL);
+	}
+}
+
+static void append_lte_properties(struct ofono_lte *lte,
+					DBusMessageIter *dict)
+{
+	const char *apn = lte->config.apn;
+
+	ofono_dbus_dict_append(dict, "DefaultAPN", DBUS_TYPE_STRING, &apn);
+}
+
+static DBusMessage *lte_get_properties(DBusConnection *conn,
+					DBusMessage *msg, void *data)
+{
+	struct ofono_lte *lte = data;
+	DBusMessage *reply;
+	DBusMessageIter iter;
+	DBusMessageIter dict;
+
+	reply = dbus_message_new_method_return(msg);
+	if (reply == NULL)
+		return NULL;
+
+	dbus_message_iter_init_append(reply, &iter);
+
+	dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY,
+					OFONO_PROPERTIES_ARRAY_SIGNATURE,
+					&dict);
+	append_lte_properties(lte, &dict);
+	dbus_message_iter_close_container(&iter, &dict);
+
+	return reply;
+}
+
+static DBusMessage *lte_set_default_apn(struct ofono_lte *lte,
+				DBusConnection *conn, DBusMessage *msg,
+				const char *apn)
+{
+	const char *path = __ofono_atom_get_path(lte->atom);
+
+	if (strlen(apn) > OFONO_GPRS_MAX_APN_LENGTH)
+		return __ofono_error_invalid_format(msg);
+
+	if (g_str_equal(apn, lte->config.apn))
+		return dbus_message_new_method_return(msg);
+
+	/* We do care about empty value: it can be used for reset. */
+	if (is_valid_apn(apn) == FALSE && apn[0] != '\0')
+		return __ofono_error_invalid_format(msg);
+
+	strcpy(lte->config.apn, apn);
+
+	if (lte->settings) {
+		if (strlen(apn) == 0)
+			/* Clear entry on empty APN. */
+			g_key_file_remove_key(lte->settings, SETTINGS_GROUP,
+						"DefaultAPN", NULL);
+		else
+			g_key_file_set_string(lte->settings, SETTINGS_GROUP,
+						"DefaultAPN", lte->config.apn);
+
+		storage_sync(lte->imsi, SETTINGS_STORE, lte->settings);
+	}
+
+	if (lte->driver)
+		lte->driver->config(lte, &lte->config, NULL, NULL);
+
+	if (msg)
+		g_dbus_send_reply(conn, msg, DBUS_TYPE_INVALID);
+
+	ofono_dbus_signal_property_changed(conn, path,
+					OFONO_CONNECTION_CONTEXT_INTERFACE,
+					"DefaultAPN",
+					DBUS_TYPE_STRING, &apn);
+
+	return NULL;
+
+}
+
+static DBusMessage *lte_set_property(DBusConnection *conn,
+					DBusMessage *msg, void *data)
+{
+	struct ofono_lte *lte = data;
+	DBusMessageIter iter;
+	DBusMessageIter var;
+	const char *property;
+	const char *str;
+
+	if (!dbus_message_iter_init(msg, &iter))
+		return __ofono_error_invalid_args(msg);
+
+	if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
+		return __ofono_error_invalid_args(msg);
+
+	dbus_message_iter_get_basic(&iter, &property);
+	dbus_message_iter_next(&iter);
+
+	if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)
+		return __ofono_error_invalid_args(msg);
+
+	dbus_message_iter_recurse(&iter, &var);
+
+
+	if (!strcmp(property, "DefaultAPN")) {
+		if (dbus_message_iter_get_arg_type(&var) != DBUS_TYPE_STRING)
+			return __ofono_error_invalid_args(msg);
+
+		dbus_message_iter_get_basic(&var, &str);
+
+		return lte_set_default_apn(lte, conn, msg, str);
+	}
+
+
+	return __ofono_error_invalid_args(msg);
+}
+
+static const GDBusMethodTable lte_methods[] = {
+	{ GDBUS_METHOD("GetProperties",
+			NULL, GDBUS_ARGS({ "properties", "a{sv}" }),
+			lte_get_properties) },
+	{ GDBUS_ASYNC_METHOD("SetProperty",
+			GDBUS_ARGS({ "property", "s" }, { "value", "v" }),
+			NULL, lte_set_property) },
+	{ }
+};
+
+static const GDBusSignalTable lte_signals[] = {
+	{ GDBUS_SIGNAL("PropertyChanged",
+			GDBUS_ARGS({ "name", "s" }, { "value", "v" })) },
+	{ }
+};
+
+static void lte_atom_remove(struct ofono_atom *atom)
+{
+	struct ofono_lte *lte = __ofono_atom_get_data(atom);
+
+	DBG("atom: %p", atom);
+
+	if (lte == NULL)
+		return;
+
+	if (lte->settings) {
+		storage_close(lte->imsi, SETTINGS_STORE, lte->settings, TRUE);
+
+		g_free(lte->imsi);
+		lte->imsi = NULL;
+		lte->settings = NULL;
+	}
+
+	if (lte->driver && lte->driver->remove)
+		lte->driver->remove(lte);
+
+	g_free(lte);
+}
+
+
+struct ofono_lte *ofono_lte_create(struct ofono_modem *modem,
+					const char *driver, void *data)
+{
+	struct ofono_lte *lte;
+	GSList *l;
+
+	if (driver == NULL)
+		return NULL;
+
+	lte = g_try_new0(struct ofono_lte, 1);
+
+	if (lte == NULL)
+		return NULL;
+
+	lte->atom = __ofono_modem_add_atom(modem, OFONO_ATOM_TYPE_LTE,
+						lte_atom_remove, lte);
+
+	for (l = g_drivers; l; l = l->next) {
+		const struct ofono_lte_driver *drv = l->data;
+
+		if (g_strcmp0(drv->name, driver))
+			continue;
+
+		if (drv->probe(lte, data) < 0)
+			continue;
+
+		lte->driver = drv;
+		break;
+	}
+
+	DBG("LTE atom created");
+
+	return lte;
+}
+
+int ofono_lte_driver_register(const struct ofono_lte_driver *d)
+{
+	DBG("driver: %p, name: %s", d, d->name);
+
+	if (d->probe == NULL)
+		return -EINVAL;
+
+	g_drivers = g_slist_prepend(g_drivers, (void *) d);
+
+	return 0;
+}
+
+void ofono_lte_driver_unregister(const struct ofono_lte_driver *d)
+{
+	DBG("driver: %p, name: %s", d, d->name);
+
+	g_drivers = g_slist_remove(g_drivers, (void *) d);
+}
+
+static void lte_atom_unregister(struct ofono_atom *atom)
+{
+	DBusConnection *conn = ofono_dbus_get_connection();
+	struct ofono_modem *modem = __ofono_atom_get_modem(atom);
+	const char *path = __ofono_atom_get_path(atom);
+
+	ofono_modem_remove_interface(modem, OFONO_LTE_INTERFACE);
+	g_dbus_unregister_interface(conn, path, OFONO_LTE_INTERFACE);
+}
+
+void ofono_lte_register(struct ofono_lte *lte)
+{
+	DBusConnection *conn = ofono_dbus_get_connection();
+	struct ofono_modem *modem = __ofono_atom_get_modem(lte->atom);
+	const char *path = __ofono_atom_get_path(lte->atom);
+	struct ofono_sim *sim = __ofono_atom_find(OFONO_ATOM_TYPE_SIM, modem);
+	const char *imsi = ofono_sim_get_imsi(sim);
+
+	if (imsi == NULL) {
+		ofono_error("No sim atom required for registering LTE atom.");	
+		return;
+	}
+
+	lte->imsi = g_strdup(imsi);
+
+	lte_load_settings(lte);
+
+	if (!g_dbus_register_interface(conn, path,
+				OFONO_LTE_INTERFACE,
+				lte_methods, lte_signals, NULL,
+				lte, NULL)) {
+		ofono_error("Could not create %s interface",
+				OFONO_LTE_INTERFACE);
+		return;
+	}
+
+	ofono_modem_add_interface(modem, OFONO_LTE_INTERFACE);
+
+	__ofono_atom_register(lte->atom, lte_atom_unregister);
+}
+
+void ofono_lte_remove(struct ofono_lte *lte)
+{
+	__ofono_atom_free(lte->atom);
+}
+
+void ofono_lte_set_data(struct ofono_lte *lte, void *data)
+{
+	lte->driver_data = data;
+}
+
+void *ofono_lte_get_data(struct ofono_lte *lte)
+{
+	return lte->driver_data;
+}

new file mode 100644
index 0000000..8210329
@@ -0,0 +1,125 @@
+/*
+ *
+ *  oFono - Open Source Telephony
+ *
+ *  Copyright (C) 2016  Endocode AG. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  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 St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#define _GNU_SOURCE
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include <glib.h>
+
+#include <ofono/modem.h>
+#include <ofono/gprs-context.h>
+#include <ofono/log.h>
+#include <ofono/lte.h>
+
+#include "gatchat.h"
+#include "gatresult.h"
+
+#include "ubloxmodem.h"
+
+struct lte_driver_data {
+	GAtChat *chat;
+};
+
+static int ublox_lte_config(struct ofono_lte *lte,
+		struct ofono_lte_context_config *config,
+		ofono_lte_cb_t cb, void *data)
+{
+	struct lte_driver_data *ldd = ofono_lte_get_data(lte);
+	char buf[32 + OFONO_GPRS_MAX_APN_LENGTH + 1];
+
+	DBG("LTE config with APN: %s", config->apn);
+
+	if (strlen(config->apn) > 0)
+		snprintf(buf, sizeof(buf), "AT+UCGDFLT=0,\"IP\",\"%s\"", config->apn);
+	else
+		snprintf(buf, sizeof(buf), "AT+UCGDFLT=0");
+
+	/* We can't do much in case of failure so don't check response. */
+	g_at_chat_send(ldd->chat, buf, NULL, NULL, NULL, NULL);
+
+	return 0;
+}
+
+static gboolean lte_delayed_register(gpointer user_data)
+{
+	struct ofono_lte *lte = user_data;
+
+	ofono_lte_register(lte);
+
+	return FALSE;
+}
+
+static int ublox_lte_probe(struct ofono_lte *lte, void *data)
+{
+	GAtChat *chat = data;
+	struct lte_driver_data *ldd;
+
+	DBG("ublox lte probe");
+
+	ldd = g_try_new0(struct lte_driver_data, 1);
+	if (!ldd) {
+		return -ENOMEM;
+	}
+
+	ldd->chat = g_at_chat_clone(chat);
+
+	ofono_lte_set_data(lte, ldd);
+
+	g_idle_add(lte_delayed_register, lte);
+
+	return 0;
+}
+
+static void ublox_lte_remove(struct ofono_lte *lte)
+{
+	struct lte_driver_data *ldd = ofono_lte_get_data(lte);
+
+	DBG("ublox lte remove");
+
+	g_at_chat_unref(ldd->chat);
+
+	ofono_lte_set_data(lte, NULL);
+
+	g_free(ldd);
+}
+
+static struct ofono_lte_driver driver = {
+	.name			= UBLOXMODEM,
+	.probe			= ublox_lte_probe,
+	.remove			= ublox_lte_remove,
+	.config			= ublox_lte_config,
+};
+
+void ublox_lte_init(void)
+{
+	ofono_lte_driver_register(&driver);
+}
+
+void ublox_lte_exit(void)
+{
+	ofono_lte_driver_unregister(&driver);
+}

index 7fc671e..93cb928 100644
@@ -29,12 +29,14 @@
 #define OFONO_API_SUBJECT_TO_CHANGE
 #include <ofono/plugin.h>
 #include <ofono/types.h>
+#include <ofono/modem.h>
 
 #include "ubloxmodem.h"
 
 static int ubloxmodem_init(void)
 {
 	ublox_gprs_context_init();
+	ublox_lte_init();
 
 	return 0;
 }

@@ -42,6 +44,7 @@ static int ubloxmodem_init(void)
 static void ubloxmodem_exit(void)
 {
 	ublox_gprs_context_exit();
+	ublox_lte_exit();
 }
 
 OFONO_PLUGIN_DEFINE(ubloxmodem, "U-Blox Toby L2 high speed modem driver",

index 0c8a621..cf66412 100644
@@ -21,5 +21,10 @@
 
 #include <drivers/atmodem/atutil.h>
 
+#define UBLOXMODEM "ubloxmodem"
+
 extern void ublox_gprs_context_init(void);
 extern void ublox_gprs_context_exit(void);
+
+extern void ublox_lte_init(void);
+extern void ublox_lte_exit(void);

index 092ba64..6d77df8 100644
@@ -38,6 +38,7 @@
 #include <ofono/sim.h>
 #include <ofono/gprs.h>
 #include <ofono/gprs-context.h>
+#include <ofono/lte.h>
 
 #include <drivers/atmodem/atutil.h>
 #include <drivers/atmodem/vendor.h>

@@ -313,6 +314,8 @@ static void ublox_post_sim(struct ofono_modem *modem)
 
 		--ncontexts;
 	}
+
+	ofono_lte_create(modem, "ubloxmodem", data->aux);
 }
 
 static void ublox_post_online(struct ofono_modem *modem)