modem: Add skeleton for USSD support

Makefile.am

@@ -171,6 +171,7 @@ builtin_sources += $(qmi_sources) \
 			drivers/qmimodem/network-registration.c \
 			drivers/qmimodem/sim-legacy.c \
 			drivers/qmimodem/sms.c \
+			drivers/qmimodem/ussd.c \
 			drivers/qmimodem/gprs.c \
 			drivers/qmimodem/gprs-context.c \
 			drivers/qmimodem/radio-settings.c \

drivers/qmimodem/qmimodem.c

@@ -35,6 +35,7 @@ static int qmimodem_init(void)
 	qmi_voicecall_init();
 	qmi_sim_legacy_init();
 	qmi_sms_init();
+	qmi_ussd_init();
 	qmi_gprs_init();
 	qmi_gprs_context_init();
 	qmi_radio_settings_init();
@@ -49,6 +50,7 @@ static void qmimodem_exit(void)
 	qmi_radio_settings_exit();
 	qmi_gprs_context_exit();
 	qmi_gprs_exit();
+	qmi_ussd_exit();
 	qmi_sms_exit();
 	qmi_sim_legacy_exit();
 	qmi_voicecall_exit();

drivers/qmimodem/qmimodem.h

@@ -36,6 +36,9 @@ extern void qmi_sim_legacy_exit(void);
 extern void qmi_sms_init(void);
 extern void qmi_sms_exit(void);
 
+extern void qmi_ussd_init(void);
+extern void qmi_ussd_exit(void);
+
 extern void qmi_gprs_init(void);
 extern void qmi_gprs_exit(void);
 

drivers/qmimodem/ussd.c

@@ -0,0 +1,110 @@
+/*
+ *
+ *  oFono - Open Source Telephony
+ *
+ *  Copyright (C) 2011-2012  Intel Corporation. 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 <ofono/log.h>
+#include <ofono/modem.h>
+#include <ofono/ussd.h>
+
+#include "qmi.h"
+
+#include "qmimodem.h"
+
+struct ussd_data {
+	struct qmi_service *voice;
+	uint16_t major;
+	uint16_t minor;
+};
+
+static void create_voice_cb(struct qmi_service *service, void *user_data)
+{
+	struct ofono_ussd *ussd = user_data;
+	struct ussd_data *data = ofono_ussd_get_data(ussd);
+
+	DBG("");
+
+	if (!service) {
+		ofono_error("Failed to request Voice service");
+		ofono_ussd_remove(ussd);
+		return;
+	}
+
+	if (!qmi_service_get_version(service, &data->major, &data->minor)) {
+		ofono_error("Failed to get Voice service version");
+		ofono_ussd_remove(ussd);
+		return;
+	}
+
+	data->voice = qmi_service_ref(service);
+
+	ofono_ussd_register(ussd);
+}
+
+static int qmi_ussd_probe(struct ofono_ussd *ussd,
+				unsigned int vendor, void *user_data)
+{
+	struct qmi_device *device = user_data;
+	struct ussd_data *data;
+
+	DBG("");
+
+	data = g_new0(struct ussd_data, 1);
+
+	ofono_ussd_set_data(ussd, data);
+
+	qmi_service_create_shared(device, QMI_SERVICE_VOICE,
+						create_voice_cb, ussd, NULL);
+
+	return 0;
+
+}
+
+static void qmi_ussd_remove(struct ofono_ussd *ussd)
+{
+	struct ussd_data *data = ofono_ussd_get_data(ussd);
+
+	DBG("");
+
+	ofono_ussd_set_data(ussd, NULL);
+
+	qmi_service_unref(data->voice);
+
+	g_free(data);
+}
+
+static struct ofono_ussd_driver driver = {
+	.name		= "qmimodem",
+	.probe		= qmi_ussd_probe,
+	.remove		= qmi_ussd_remove,
+};
+
+void qmi_ussd_init(void)
+{
+	ofono_ussd_driver_register(&driver);
+}
+
+void qmi_ussd_exit(void)
+{
+	ofono_ussd_driver_unregister(&driver);
+}