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/*
 *
 *  oFono - Open Source Telephony
 *
 *  Copyright (C) 2008-2009  Intel Corporation. All rights reserved.
 *  Copyright (C) 2010 ST-Ericsson AB.
 *
 *  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 <errno.h>
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <glib.h>
#include <gatchat.h>

#define OFONO_API_SUBJECT_TO_CHANGE
#include <ofono/plugin.h>
#include <ofono/log.h>
#include <ofono/modem.h>
#include <ofono/call-barring.h>
#include <ofono/call-forwarding.h>
#include <ofono/call-meter.h>
#include <ofono/call-settings.h>
#include <ofono/devinfo.h>
#include <ofono/message-waiting.h>
#include <ofono/netreg.h>
#include <ofono/phonebook.h>
#include <ofono/sim.h>
#include <ofono/sms.h>
#include <ofono/ssn.h>
#include <ofono/ussd.h>
#include <ofono/call-volume.h>
#include <ofono/voicecall.h>
#include <ofono/gprs.h>
#include <ofono/gprs-context.h>
#include <drivers/atmodem/vendor.h>

#include <drivers/stemodem/caif_socket.h>
#include <drivers/stemodem/if_caif.h>

struct ste_data {
	GAtChat *chat;
};

static int ste_probe(struct ofono_modem *modem)
{
	struct ste_data *data;

	DBG("%p", modem);

	data = g_try_new0(struct ste_data, 1);
	if (!data)
		return -ENOMEM;

	ofono_modem_set_data(modem, data);

	return 0;
}

static void ste_remove(struct ofono_modem *modem)
{
	struct ste_data *data = ofono_modem_get_data(modem);

	DBG("%p", modem);

	ofono_modem_set_data(modem, NULL);

	g_at_chat_unref(data->chat);
	g_free(data);
}

static void ste_debug(const char *str, void *user_data)
{
	ofono_info("%s", str);
}

static void cfun_enable(gboolean ok, GAtResult *result, gpointer user_data)
{
	struct ofono_modem *modem = user_data;

	DBG("");

	if (!ok)
		ofono_modem_set_powered(modem, FALSE);

	ofono_modem_set_powered(modem, TRUE);
}

static int ste_enable(struct ofono_modem *modem)
{
	struct ste_data *data = ofono_modem_get_data(modem);
	GIOChannel *channel;
	GAtSyntax *syntax;
	const char *device;
	int fd;

	DBG("%p", modem);

	device = ofono_modem_get_string(modem, "Device");
	if (!device) {
		struct sockaddr_caif addr;
		int err;

		/* Create a CAIF socket for AT Service */
		fd = socket(AF_CAIF, SOCK_SEQPACKET, CAIFPROTO_AT);
		if (fd < 0) {
			ofono_error("Failed to create CAIF socket for AT");
			return -EIO;
		}

		memset(&addr, 0, sizeof(addr));
		addr.family = AF_CAIF;
		addr.u.at.type = CAIF_ATTYPE_PLAIN;

		/* Connect to the AT Service at the modem */
		err = connect(fd, (struct sockaddr *) &addr, sizeof(addr));
		if (err < 0) {
			ofono_error("Failed to connect CAIF socket for AT");
			close(fd);
			return err;
		}
	} else {
		fd = open(device, O_RDWR);
		if (fd < 0) {
			ofono_error("Failed to open device %s", device);
			return -EIO;
		}
	}

	channel = g_io_channel_unix_new(fd);
	if (!channel)  {
		close(fd);
		return -EIO;
	}
	g_io_channel_set_close_on_unref(channel, TRUE);

	syntax = g_at_syntax_new_gsm_permissive();

	data->chat = g_at_chat_new_blocking(channel, syntax);
	g_at_syntax_unref(syntax);
	g_io_channel_unref(channel);

	if (!data->chat)
		return -ENOMEM;

	if (getenv("OFONO_AT_DEBUG"))
		g_at_chat_set_debug(data->chat, ste_debug, NULL);

	g_at_chat_send(data->chat, "ATE0 +CMEE=1", NULL, NULL, NULL, NULL);
	g_at_chat_send(data->chat, "AT+CFUN=1", NULL, cfun_enable, modem, NULL);

	return -EINPROGRESS;
}

static void cfun_disable(gboolean ok, GAtResult *result, gpointer user_data)
{
	struct ofono_modem *modem = user_data;
	struct ste_data *data = ofono_modem_get_data(modem);

	DBG("");

	g_at_chat_shutdown(data->chat);
	g_at_chat_unref(data->chat);
	data->chat = NULL;

	if (ok)
		ofono_modem_set_powered(modem, FALSE);
}

static int ste_disable(struct ofono_modem *modem)
{
	struct ste_data *data = ofono_modem_get_data(modem);

	DBG("%p", modem);

	if (!data->chat)
		return 0;

	g_at_chat_cancel_all(data->chat);
	g_at_chat_unregister_all(data->chat);
	g_at_chat_send(data->chat, "AT+CFUN=4", NULL,
					cfun_disable, modem, NULL);

	return -EINPROGRESS;
}

static void ste_pre_sim(struct ofono_modem *modem)
{
	struct ste_data *data = ofono_modem_get_data(modem);

	DBG("%p", modem);

	ofono_devinfo_create(modem, 0, "atmodem", data->chat);
	ofono_sim_create(modem, 0, "atmodem", data->chat);
	ofono_voicecall_create(modem, 0, "stemodem", data->chat);
}

static void ste_post_sim(struct ofono_modem *modem)
{
	struct ste_data *data = ofono_modem_get_data(modem);
	struct ofono_message_waiting *mw;
	struct ofono_gprs *gprs;
	struct ofono_gprs_context *gc;

	DBG("%p", modem);

	ofono_ussd_create(modem, 0, "atmodem", data->chat);
	ofono_call_forwarding_create(modem, 0, "atmodem", data->chat);
	ofono_call_settings_create(modem, 0, "atmodem", data->chat);
	ofono_netreg_create(modem, OFONO_VENDOR_STE, "atmodem", data->chat);
	ofono_call_meter_create(modem, 0, "atmodem", data->chat);
	ofono_call_barring_create(modem, 0, "atmodem", data->chat);
	ofono_ssn_create(modem, 0, "atmodem", data->chat);
	ofono_sms_create(modem, 0, "atmodem", data->chat);
	ofono_phonebook_create(modem, 0, "atmodem", data->chat);
	ofono_call_volume_create(modem, 0, "atmodem", data->chat);

	gprs = ofono_gprs_create(modem,
			OFONO_VENDOR_STE, "atmodem", data->chat);
	gc = ofono_gprs_context_create(modem, 0, "stemodem", data->chat);

	if (gprs && gc)
		ofono_gprs_add_context(gprs, gc);

	mw = ofono_message_waiting_create(modem);

	if (mw)
		ofono_message_waiting_register(mw);
}

static struct ofono_modem_driver ste_driver = {
	.name		= "ste",
	.probe		= ste_probe,
	.remove		= ste_remove,
	.enable		= ste_enable,
	.disable	= ste_disable,
	.pre_sim	= ste_pre_sim,
	.post_sim	= ste_post_sim,
};

static int ste_init(void)
{
	return ofono_modem_driver_register(&ste_driver);
}

static void ste_exit(void)
{
	ofono_modem_driver_unregister(&ste_driver);
}

OFONO_PLUGIN_DEFINE(ste, "ST-Ericsson modem driver", VERSION,
			OFONO_PLUGIN_PRIORITY_DEFAULT, ste_init, ste_exit)