/*
 *  drivers/arisc/interfaces/arisc_loopback.c
 *
 * Copyright (c) 2012 Allwinner.
 * 2012-05-01 Written by sunny (sunny@allwinnertech.com).
 * 2012-10-01 Written by superm (superm@allwinnertech.com).
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "../arisc_i.h"

#if defined CONFIG_SUNXI_ARISC_COM_DIRECTLY
int arisc_message_loopback(void)
{
	int                   result;
	struct arisc_message *pmessage;

	/* allocate a message frame */
	pmessage = arisc_message_allocate(ARISC_MESSAGE_ATTR_HARDSYN);
	if (pmessage == NULL) {
		ARISC_WRN("allocate message failed\n");
		return -ENOMEM;
	}

	/* initialize message */
	pmessage->type       = ARISC_MESSAGE_LOOPBACK;
	pmessage->state      = ARISC_MESSAGE_INITIALIZED;
	pmessage->paras[0]   = 11;
	pmessage->cb.handler = NULL;
	pmessage->cb.arg     = NULL;

	/* send message use hwmsgbox */
	arisc_hwmsgbox_send_message(pmessage, ARISC_SEND_MSG_TIMEOUT);

	/* free message */
	result = pmessage->result;
	arisc_message_free(pmessage);

	return result;
}
EXPORT_SYMBOL(arisc_message_loopback);
#else
int arisc_message_loopback(void)
{
	int                   result;

	result = invoke_scp_fn_smc(ARM_SVC_ARISC_MESSAGE_LOOPBACK, 0, 0, 0);

	return result;
}
EXPORT_SYMBOL(arisc_message_loopback);
#endif