/******************************************************************************
*
* Copyright (C) 2007 - 2014 Xilinx, Inc.  All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* Use of the Software is limited solely to applications:
* (a) running on a Xilinx device, or
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*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* this Software without prior written authorization from Xilinx.
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******************************************************************************/

#include "lwipopts.h"
#include "xlwipconfig.h"

#if !NO_SYS
#ifdef OS_IS_XILKERNEL
#include "xmk.h"
#include "sys/process.h"
#endif
#endif

#include "lwip/mem.h"
#include "lwip/stats.h"
#include "lwip/sys.h"
#include "lwip/ip.h"
#include "lwip/tcp.h"
#include "lwip/udp.h"
#include "lwip/tcp_impl.h"

#include "netif/etharp.h"
#include "netif/xadapter.h"

#ifdef XLWIP_CONFIG_INCLUDE_EMACLITE
#include "netif/xemacliteif.h"
#endif

#ifdef XLWIP_CONFIG_INCLUDE_TEMAC
#include "netif/xlltemacif.h"
#endif

#ifdef XLWIP_CONFIG_INCLUDE_AXI_ETHERNET
#include "netif/xaxiemacif.h"
#endif

#ifdef XLWIP_CONFIG_INCLUDE_GEM
#include "netif/xemacpsif.h"
#endif

#if !NO_SYS
#include "lwip/tcpip.h"
#endif


/* global lwip debug variable used for debugging */
int lwip_runtime_debug = 0;

void
lwip_raw_init()
{
	ip_init();	/* Doesn't do much, it should be called to handle future changes. */
#if LWIP_UDP
	udp_init();	/* Clears the UDP PCB list. */
#endif
#if LWIP_TCP
	tcp_init();	/* Clears the TCP PCB list and clears some internal TCP timers. */
			/* Note: you must call tcp_fasttmr() and tcp_slowtmr() at the */
			/* predefined regular intervals after this initialization. */
#endif
}

static enum xemac_types
find_mac_type(unsigned base)
{
	int i;

	for (i = 0; i < xtopology_n_emacs; i++) {
		if (xtopology[i].emac_baseaddr == base)
			return xtopology[i].emac_type;
	}

	return xemac_type_unknown;
}

int
xtopology_find_index(unsigned base)
{
	int i;

	for (i = 0; i < xtopology_n_emacs; i++) {
		if (xtopology[i].emac_baseaddr == base)
			return i;
	}

	return -1;
}

/*
 * xemac_add: this is a wrapper around lwIP's netif_add function.
 * The objective is to provide portability between the different Xilinx MAC's
 * This function can be used to add both xps_ethernetlite and xps_ll_temac
 * based interfaces
 */
struct netif *
xemac_add(struct netif *netif,
	struct ip_addr *ipaddr, struct ip_addr *netmask, struct ip_addr *gw,
	unsigned char *mac_ethernet_address,
	unsigned mac_baseaddr)
{
	int i;

	/* set mac address */
	netif->hwaddr_len = 6;
	for (i = 0; i < 6; i++)
		netif->hwaddr[i] = mac_ethernet_address[i];

	/* initialize based on MAC type */
		switch (find_mac_type(mac_baseaddr)) {
			case xemac_type_xps_emaclite:
#ifdef XLWIP_CONFIG_INCLUDE_EMACLITE
				return netif_add(netif, ipaddr, netmask, gw,
					(void*)mac_baseaddr,
					xemacliteif_init,
#if NO_SYS
					ethernet_input
#else
					tcpip_input
#endif
					);
#else
				return NULL;
#endif
			case xemac_type_xps_ll_temac:
#ifdef XLWIP_CONFIG_INCLUDE_TEMAC
				return netif_add(netif, ipaddr, netmask, gw,
					(void*)mac_baseaddr,
					xlltemacif_init,
#if NO_SYS
					ethernet_input
#else
					tcpip_input
#endif
					);
#else
				return NULL;
#endif
			case xemac_type_axi_ethernet:
#ifdef XLWIP_CONFIG_INCLUDE_AXI_ETHERNET
				return netif_add(netif, ipaddr, netmask, gw,
					(void*)mac_baseaddr,
					xaxiemacif_init,
#if NO_SYS
					ethernet_input
#else
					tcpip_input
#endif
					);
#else
				return NULL;
#endif
#ifdef __arm__
			case xemac_type_emacps:
#ifdef XLWIP_CONFIG_INCLUDE_GEM
				return netif_add(netif, ipaddr, netmask, gw,
						(void*)mac_baseaddr,
						xemacpsif_init,
#if NO_SYS
						ethernet_input
#else
						tcpip_input
#endif

						);
#endif
#endif
			default:
				printf("unable to determine type of EMAC with baseaddress 0x%08x\r\n",
						mac_baseaddr);
				return NULL;
	}
}

#if !NO_SYS
/*
 * The input thread calls lwIP to process any received packets.
 * This thread waits until a packet is received (sem_rx_data_available),
 * and then calls xemacif_input which processes 1 packet at a time.
 */
void
xemacif_input_thread(struct netif *netif)
{
	struct xemac_s *emac = (struct xemac_s *)netif->state;
	while (1) {
		/* sleep until there are packets to process
		 * This semaphore is set by the packet receive interrupt
		 * routine.
		 */
		sys_sem_wait(&emac->sem_rx_data_available);

		/* move all received packets to lwIP */
		xemacif_input(netif);
	}
}
#endif

int
xemacif_input(struct netif *netif)
{
	struct xemac_s *emac = (struct xemac_s *)netif->state;
	SYS_ARCH_DECL_PROTECT(lev);

	int n_packets = 0;

	switch (emac->type) {
		case xemac_type_xps_emaclite:
#ifdef XLWIP_CONFIG_INCLUDE_EMACLITE
			SYS_ARCH_PROTECT(lev);
			n_packets = xemacliteif_input(netif);
			SYS_ARCH_UNPROTECT(lev);
			break;
#else
			print("incorrect configuration: xps_ethernetlite drivers not present?");
			while(1);
			return 0;
#endif
		case xemac_type_xps_ll_temac:
#ifdef XLWIP_CONFIG_INCLUDE_TEMAC
			SYS_ARCH_PROTECT(lev);
			n_packets = xlltemacif_input(netif);
			SYS_ARCH_UNPROTECT(lev);
			break;
#else
			print("incorrect configuration: xps_ll_temac drivers not present?");
			while(1);
			return 0;
#endif
		case xemac_type_axi_ethernet:
#ifdef XLWIP_CONFIG_INCLUDE_AXI_ETHERNET
			SYS_ARCH_PROTECT(lev);
			n_packets = xaxiemacif_input(netif);
			SYS_ARCH_UNPROTECT(lev);
			break;
#else
			print("incorrect configuration: axi_ethernet drivers not present?");
			while(1);
			return 0;
#endif
#ifdef __arm__
		case xemac_type_emacps:
#ifdef XLWIP_CONFIG_INCLUDE_GEM
			SYS_ARCH_PROTECT(lev);
			n_packets = xemacpsif_input(netif);
			SYS_ARCH_UNPROTECT(lev);
			break;
#else
			xil_printf("incorrect configuration: ps7_ethernet drivers not present?\r\n");
			while(1);
			return 0;
#endif
#endif
		default:
			print("incorrect configuration: unknown temac type");
			while(1);
			return 0;
	}

	return n_packets;
}