/*
 * Copyright (c) 2009 Lukas Mejdrech
 * 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 dp8390
 *  @{
 */

/** @file
 *  DP8390 network interface implementation.
 */

#include <assert.h>
#include <async.h>
#include <ddi.h>
#include <errno.h>
#include <malloc.h>
//#include <stdio.h>
#include <ipc/ipc.h>
#include <ipc/services.h>

#include "../../err.h"
#include "../../messages.h"
#include "../../modules.h"

#include "../../structures/packet/packet_client.h"
#include "../../structures/measured_strings.h"

#include "../../include/device.h"
#include "../../include/nil_interface.h"

#include "../netif.h"
#include "../netif_module.h"

#include "dp8390.h"
#include "dp8390_drv.h"
#include "dp8390_port.h"

/** DP8390 module name.
 */
#define NAME	"dp8390 network interface"

/** Returns the device from the interrupt call.
 *  @param[in] call The interrupt call.
 */
#define IRQ_GET_DEVICE( call )			( device_id_t ) IPC_GET_METHOD( * call )

/** Returns the interrupt status register from the interrupt call.
 *  @param[in] call The interrupt call.
 */
#define IPC_GET_ISR( call )				( int ) IPC_GET_ARG2( * call )

/** DP8390 kernel interrupt command sequence.
 */
static irq_cmd_t	dp8390_cmds[] = {
	{ 	.cmd = CMD_PIO_READ_8,
		.addr = NULL,
		.dstarg = 2
	},
	{
		.cmd = CMD_PREDICATE,
		.value = 1,
		.srcarg = 2
	},
	{
		.cmd = CMD_ACCEPT
	}
};

/** DP8390 kernel interrupt code.
 */
static irq_code_t	dp8390_code = {
	sizeof( dp8390_cmds ) / sizeof( irq_cmd_t ),
	dp8390_cmds
};

/** Network interface module global data.
 */
netif_globals_t netif_globals;

/** Prints the module name.
 *  @see NAME
 */
void	module_print_name( void );

/** Handles the interrupt messages.
 *  This is the interrupt handler callback function.
 *  @param[in] iid The interrupt message identifier.
 *  @param[in] call The interrupt message.
 */
void	irq_handler( ipc_callid_t iid, ipc_call_t * call );

/** Changes the network interface state.
 *  @param[in,out] device The network interface.
 *  @param[in] state The new state.
 *  @returns The new state.
 */
int	change_state( device_ref device, device_state_t state );

int netif_specific_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){
	return ENOTSUP;
}

int netif_get_device_stats( device_id_t device_id, device_stats_ref stats ){
	ERROR_DECLARE;

	device_ref		device;
	eth_stat_t *	de_stat;

	if( ! stats ) return EBADMEM;
	ERROR_PROPAGATE( find_device( device_id, & device ));
	de_stat = & (( dpeth_t * ) device->specific )->de_stat;
	null_device_stats( stats );
	stats->receive_errors = de_stat->ets_recvErr;
	stats->send_errors = de_stat->ets_sendErr;
	stats->receive_crc_errors = de_stat->ets_CRCerr;
	stats->receive_frame_errors = de_stat->ets_frameAll;
	stats->receive_missed_errors = de_stat->ets_missedP;
	stats->receive_packets = de_stat->ets_packetR;
	stats->send_packets = de_stat->ets_packetT;
	stats->collisions = de_stat->ets_collision;
	stats->send_aborted_errors = de_stat->ets_transAb;
	stats->send_carrier_errors = de_stat->ets_carrSense;
	stats->send_heartbeat_errors = de_stat->ets_CDheartbeat;
	stats->send_window_errors = de_stat->ets_OWC;
	return EOK;
}

void module_print_name( void ){
	printf( "%s", NAME );
}

int netif_get_addr_message( device_id_t device_id, measured_string_ref address ){
	ERROR_DECLARE;

	device_ref	device;

	if( ! address ) return EBADMEM;
	ERROR_PROPAGATE( find_device( device_id, & device ));
	address->value = ( char * ) ( & (( dpeth_t * ) device->specific )->de_address );
	address->length = CONVERT_SIZE( ether_addr_t, char, 1 );
	return EOK;
}

void irq_handler( ipc_callid_t iid, ipc_call_t * call )
{
	device_ref	device;
	dpeth_t *	dep;
	packet_t	received;
	device_id_t	device_id;
	int			phone;

	device_id = IRQ_GET_DEVICE( call );
	fibril_rwlock_write_lock( & netif_globals.lock );
	if( find_device( device_id, & device ) != EOK ){
		fibril_rwlock_write_unlock( & netif_globals.lock );
		return;
	}
	dep = ( dpeth_t * ) device->specific;
	if ( dep->de_mode != DEM_ENABLED){
		fibril_rwlock_write_unlock( & netif_globals.lock );
		return;
	}
	assert( dep->de_flags & DEF_ENABLED);
	dep->de_int_pending = 0;
//	remove debug print:
	printf( "I%d: 0x%x\n", device_id, IPC_GET_ISR( call ));
	dp_check_ints( dep, IPC_GET_ISR( call ));
	if( dep->received_queue ){
		received = dep->received_queue;
		phone = device->nil_phone;
		dep->received_queue = NULL;
		dep->received_count = 0;
		fibril_rwlock_write_unlock( & netif_globals.lock );
//	remove debug dump:
	uint8_t *	data;
	data = packet_get_data( received );
	printf( "Receiving packet:\n\tid\t= %d\n\tlength\t= %d\n\tdata\t= %.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX\n\t\t%.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX\n", packet_get_id( received ), packet_get_data_length( received ), data[ 0 ], data[ 1 ], data[ 2 ], data[ 3 ], data[ 4 ], data[ 5 ], data[ 6 ], data[ 7 ], data[ 8 ], data[ 9 ], data[ 10 ], data[ 11 ], data[ 12 ], data[ 13 ], data[ 14 ], data[ 15 ], data[ 16 ], data[ 17 ], data[ 18 ], data[ 19 ], data[ 20 ], data[ 21 ], data[ 22 ], data[ 23 ], data[ 24 ], data[ 25 ], data[ 26 ], data[ 27 ], data[ 28 ], data[ 29 ], data[ 30 ], data[ 31 ], data[ 32 ], data[ 33 ], data[ 34 ], data[ 35 ], data[ 36 ], data[ 37 ], data[ 38 ], data[ 39 ], data[ 40 ], data[ 41 ], data[ 42 ], data[ 43 ], data[ 44 ], data[ 45 ], data[ 46 ], data[ 47 ], data[ 48 ], data[ 49 ], data[ 50 ], data[ 51 ], data[ 52 ], data[ 53 ], data[ 54 ], data[ 55 ], data[ 56 ], data[ 57 ], data[ 58 ], data[ 59 ] );
		nil_received_msg( phone, device_id, received, NULL );
	}else{
		fibril_rwlock_write_unlock( & netif_globals.lock );
	}
	ipc_answer_0( iid, EOK );
}

int netif_probe_message( device_id_t device_id, int irq, uintptr_t io ){
	ERROR_DECLARE;

	device_ref	device;
	dpeth_t *	dep;

	device = ( device_ref ) malloc( sizeof( device_t ));
	if( ! device ) return ENOMEM;
	dep = ( dpeth_t * ) malloc( sizeof( dpeth_t ));
	if( ! dep ){
		free( device );
		return ENOMEM;
	}
	bzero( device, sizeof( device_t ));
	bzero( dep, sizeof( dpeth_t ));
	device->device_id = device_id;
	device->nil_phone = -1;
	device->specific = ( void * ) dep;
	device->state = NETIF_STOPPED;
	dep->de_irq = irq;
	dep->de_mode = DEM_DISABLED;
	//TODO address?
	if( ERROR_OCCURRED( pio_enable(( void * ) io, DP8390_IO_SIZE, ( void ** ) & dep->de_base_port ))
	|| ERROR_OCCURRED( do_probe( dep ))){
		free( dep );
		free( device );
		return ERROR_CODE;
	}
	if( ERROR_OCCURRED( device_map_add( & netif_globals.device_map, device->device_id, device ))){
		free( dep );
		free( device );
		return ERROR_CODE;
	}
	return EOK;
}

int netif_send_message( device_id_t device_id, packet_t packet, services_t sender ){
	ERROR_DECLARE;

	device_ref	device;
	dpeth_t *	dep;
	packet_t	next;

	ERROR_PROPAGATE( find_device( device_id, & device ));
	if( device->state != NETIF_ACTIVE ){
		netif_pq_release( packet_get_id( packet ));
		return EFORWARD;
	}
	dep = ( dpeth_t * ) device->specific;
	// process packet queue
	do{
		next = pq_detach( packet );
//		remove debug dump:
		uint8_t *	data;
		data = packet_get_data( packet );
		printf( "Sending packet:\n\tid\t= %d\n\tlength\t= %d\n\tdata\t= %.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX\n\t\t%.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX:%.2hhX %.2hhX %.2hhX %.2hhX\n", packet_get_id( packet ), packet_get_data_length( packet ), data[ 0 ], data[ 1 ], data[ 2 ], data[ 3 ], data[ 4 ], data[ 5 ], data[ 6 ], data[ 7 ], data[ 8 ], data[ 9 ], data[ 10 ], data[ 11 ], data[ 12 ], data[ 13 ], data[ 14 ], data[ 15 ], data[ 16 ], data[ 17 ], data[ 18 ], data[ 19 ], data[ 20 ], data[ 21 ], data[ 22 ], data[ 23 ], data[ 24 ], data[ 25 ], data[ 26 ], data[ 27 ], data[ 28 ], data[ 29 ], data[ 30 ], data[ 31 ], data[ 32 ], data[ 33 ], data[ 34 ], data[ 35 ], data[ 36 ], data[ 37 ], data[ 38 ], data[ 39 ], data[ 40 ], data[ 41 ], data[ 42 ], data[ 43 ], data[ 44 ], data[ 45 ], data[ 46 ], data[ 47 ], data[ 48 ], data[ 49 ], data[ 50 ], data[ 51 ], data[ 52 ], data[ 53 ], data[ 54 ], data[ 55 ], data[ 56 ], data[ 57 ], data[ 58 ], data[ 59 ] );

		if( do_pwrite( dep, packet, FALSE ) != EBUSY ){
			netif_pq_release( packet_get_id( packet ));
		}
		packet = next;
	}while( packet );
	return EOK;
}

int	netif_start_message( device_ref device ){
	ERROR_DECLARE;

	dpeth_t *	dep;

	if( device->state != NETIF_ACTIVE ){
		dep = ( dpeth_t * ) device->specific;
		dp8390_cmds[ 0 ].addr = ( void * ) ( uintptr_t ) ( dep->de_dp8390_port + DP_ISR );
		dp8390_cmds[ 2 ].addr = dp8390_cmds[ 0 ].addr;
		ERROR_PROPAGATE( ipc_register_irq( dep->de_irq, device->device_id, device->device_id, & dp8390_code ));
		if( ERROR_OCCURRED( do_init( dep, DL_BROAD_REQ ))){
			ipc_unregister_irq( dep->de_irq, device->device_id );
			return ERROR_CODE;
		}
		return change_state( device, NETIF_ACTIVE );
	}
	return EOK;
}

int	netif_stop_message( device_ref device ){
	dpeth_t *	dep;

	if( device->state != NETIF_STOPPED ){
		dep = ( dpeth_t * ) device->specific;
		do_stop( dep );
		ipc_unregister_irq( dep->de_irq, device->device_id );
		return change_state( device, NETIF_STOPPED );
	}
	return EOK;
}

int change_state( device_ref device, device_state_t state ){
	device->state = state;
	printf( "State changed to %s\n", ( state == NETIF_ACTIVE ) ? "ACTIVE" : "STOPPED" );
	return state;
}

int netif_initialize( void ){
	ipcarg_t	phonehash;

	async_set_interrupt_received( irq_handler );

	return REGISTER_ME( SERVICE_DP8390, & phonehash );
}

/** @}
 */