/*
 * Copyright (c) 2011 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup kbd_port
 * @ingroup kbd
 * @{
 */
/** @file
 * @brief ADB keyboard port driver.
 */

#include <ipc/adb.h>
#include <async.h>
#include <vfs/vfs.h>
#include <errno.h>
#include <loc.h>
#include "../input.h"
#include "../kbd_port.h"
#include "../kbd.h"

static void kbd_port_events(ipc_callid_t iid, ipc_call_t *icall, void *arg);
static void adb_kbd_reg0_data(uint16_t data);

static int adb_port_init(kbd_dev_t *);
static void adb_port_write(uint8_t);

kbd_port_ops_t adb_port = {
	.init = adb_port_init,
	.write = adb_port_write
};

static kbd_dev_t *kbd_dev;
static async_sess_t *dev_sess;

static int adb_port_init(kbd_dev_t *kdev)
{
	kbd_dev = kdev;
	
	const char *dev = "devices/\\hw\\adb\\kbd";
	service_id_t service_id;
	int rc = loc_service_get_id(dev, &service_id, IPC_FLAG_BLOCKING);
	if (rc != EOK)
		return rc;
	
	dev_sess = loc_service_connect(service_id, INTERFACE_DDF, 0);
	if (dev_sess == NULL) {
		printf("%s: Failed to connect to device\n", NAME);
		return ENOENT;
	}
	
	async_exch_t *exch = async_exchange_begin(dev_sess);
	if (exch == NULL) {
		printf("%s: Failed starting exchange with device\n", NAME);
		async_hangup(dev_sess);
		return ENOMEM;
	}
	
	port_id_t port;
	rc = async_create_callback_port(exch, INTERFACE_ADB_CB, 0, 0,
	    kbd_port_events, NULL, &port);
	
	async_exchange_end(exch);
	if (rc != EOK) {
		printf("%s: Failed to create callback from device\n", NAME);
		async_hangup(dev_sess);
		return rc;
	}
	
	return EOK;
}

static void adb_port_write(uint8_t data)
{
	/*async_msg_1(dev_phone, CHAR_WRITE_BYTE, data);*/
}

static void kbd_port_events(ipc_callid_t iid, ipc_call_t *icall, void *arg)
{
	/* Ignore parameters, the connection is already opened */
	while (true) {

		ipc_call_t call;
		ipc_callid_t callid = async_get_call(&call);

		int retval = EOK;
		
		if (!IPC_GET_IMETHOD(call)) {
			/* TODO: Handle hangup */
			return;
		}
		
		switch (IPC_GET_IMETHOD(call)) {
		case ADB_REG_NOTIF:
			adb_kbd_reg0_data(IPC_GET_ARG1(call));
			break;
		default:
			retval = ENOENT;
		}
		async_answer_0(callid, retval);
	}
}

static void adb_kbd_reg0_data(uint16_t data)
{
	uint8_t b0 = (data >> 8) & 0xff;
	uint8_t b1 = data & 0xff;
	
	if (b0 != 0xff)
		kbd_push_data(kbd_dev, b0);
	
	if (b1 != 0xff)
		kbd_push_data(kbd_dev, b1);
}

/**
 * @}
 */