ethernet.c

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/* Copyright (c) 2009 Atmel Corporation. All rights reserved.
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 * list of conditions and the following disclaimer.
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 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. The name of Atmel may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * 4. This software may only be redistributed and used in connection with an Atmel
 * AVR product.
 *
 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
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#include <string.h>

#include "gpio.h" // Have to include gpio.h before FreeRTOS.h as long as FreeRTOS
                  // redefines the inline keyword to empty.

/* Scheduler include files. */
#include "FreeRTOS.h"
#include "task.h"

/* Demo program include files. */
#include "partest.h"
#include "serial.h"
#include "conf_lwip_threads.h"

/* ethernet includes */
#include "ethernet.h"
#include "conf_eth.h"
#include "macb.h"

#if (HTTP_USED == 1)
  #include "BasicWEB.h"
#endif

#if (SSL_USED == 1)
  #include "BasicSSL.h"
#endif

/* lwIP includes */
#include "lwip/sys.h"
#include "lwip/api.h"
#include "lwip/tcpip.h"
#include <lwip/dhcp.h>
#include <lwip/dns.h>
#include "lwip/memp.h"
#include "lwip/stats.h"
#include "netif/loopif.h"

#include "print_funcs.h"

//_____ M A C R O S ________________________________________________________


//_____ D E F I N I T I O N S ______________________________________________

/* global variable containing MAC Config (hw addr, IP, GW, ...) */
struct netif MACB_if;

//_____ D E C L A R A T I O N S ____________________________________________

/* Initialisation required by lwIP. */
static void prvlwIPInit( void );

/* Initialisation of ethernet interfaces by reading config file */
static void prvEthernetConfigureInterface(void * param);
static void prvInitDNS( void );
void dns_found(const char *name, struct ip_addr *addr, void *arg);
void status_callback(struct netif *netif);

void vStartEthernetTaskLauncher( unsigned portBASE_TYPE uxPriority )
{
  /* Spawn the Sentinel task. */
  xTaskCreate( vStartEthernetTask, ( const signed portCHAR * )"ETHLAUNCH",
               configMINIMAL_STACK_SIZE, NULL, uxPriority, ( xTaskHandle * )NULL );
}

portTASK_FUNCTION( vStartEthernetTask, pvParameters )
{
   static const gpio_map_t MACB_GPIO_MAP =
   {
      {AVR32_MACB_MDC_0_PIN,    AVR32_MACB_MDC_0_FUNCTION   },
      {AVR32_MACB_MDIO_0_PIN,   AVR32_MACB_MDIO_0_FUNCTION  },
      {AVR32_MACB_RXD_0_PIN,    AVR32_MACB_RXD_0_FUNCTION   },
      {AVR32_MACB_TXD_0_PIN,    AVR32_MACB_TXD_0_FUNCTION   },
      {AVR32_MACB_RXD_1_PIN,    AVR32_MACB_RXD_1_FUNCTION   },
      {AVR32_MACB_TXD_1_PIN,    AVR32_MACB_TXD_1_FUNCTION   },
      {AVR32_MACB_TX_EN_0_PIN,  AVR32_MACB_TX_EN_0_FUNCTION },
      {AVR32_MACB_RX_ER_0_PIN,  AVR32_MACB_RX_ER_0_FUNCTION },
      {AVR32_MACB_RX_DV_0_PIN,  AVR32_MACB_RX_DV_0_FUNCTION },
      {AVR32_MACB_TX_CLK_0_PIN, AVR32_MACB_TX_CLK_0_FUNCTION}
   };

   // Assign GPIO to MACB
   gpio_enable_module(MACB_GPIO_MAP, sizeof(MACB_GPIO_MAP) / sizeof(MACB_GPIO_MAP[0]));

   /* Setup lwIP. */
   prvlwIPInit();

#if (HTTP_USED == 1)
   /* Create the WEB server task.  This uses the lwIP RTOS abstraction layer.*/
   sys_thread_new( "WEB", vBasicWEBServer, ( void * ) NULL,
                   lwipBASIC_WEB_SERVER_STACK_SIZE,
                   lwipBASIC_WEB_SERVER_PRIORITY );
#endif
   
#if (SSL_USED == 1)
   /* Create the SSL Client task.  This uses the lwIP RTOS abstraction layer.*/
   sys_thread_new( "SSL", vBasicSSLClient, ( void * ) NULL,
                   lwipBASIC_SSL_CLIENT_STACK_SIZE,
                   lwipBASIC_SSL_CLIENT_PRIORITY );
#endif   
   
  // Kill this task.
  vTaskDelete(NULL);
}


static void tcpip_init_done(void *arg)
{
  sys_sem_t *sem;
  sem = (sys_sem_t *)arg;
  sys_sem_signal(*sem); // Signal the waiting thread that the TCP/IP init is done.
}

void status_callback(struct netif *netif)
{   
  if (netif_is_up(netif)) { 
    print_dbg("LwIP: status_callback==UP, local interface IP is ");
    print_dbg(inet_ntoa(*(struct in_addr*)&(netif->ip_addr)));
    print_dbg("\n");
  } else {
    print_dbg("status_callback==DOWN\n");
  }
#if ( LWIP_NETIF_HOSTNAME == 1)
  print_dbg("LwIP: Host Name Is : ");
  print_dbg(MACB_if.hostname);
  print_dbg("\n");
#endif
}

void dns_found(const char *name, struct ip_addr *addr, void *arg)
{
  LWIP_UNUSED_ARG(arg);
  print_dbg(name);
  print_dbg(":");
  print_dbg(addr?inet_ntoa(*(struct in_addr*)addr):"<not found>\n");
}

static void prvlwIPInit( void )
{
  sys_sem_t sem;


  sem = sys_sem_new(0); // Create a new semaphore.
  tcpip_init(tcpip_init_done, &sem);
  sys_sem_wait(sem);    // Block until the lwIP stack is initialized.
  sys_sem_free(sem);    // Free the semaphore.

  /* Set hw and IP parameters, initialize MACB too */
  prvEthernetConfigureInterface(NULL);
  
}

#if LWIP_DNS
static void prvInitDNS( void ) {
    char* dnsname=DNS_SERVER_NAME;
    struct ip_addr dnsresp;
    if (dns_gethostbyname(dnsname, &dnsresp, dns_found, 0) == ERR_OK) {
        dns_found(dnsname, &dnsresp, 0);
    }
}
#endif 

static void prvEthernetConfigureInterface(void * param)
{
   struct ip_addr    xIpAddr, xNetMask, xGateway;
   extern err_t      ethernetif_init( struct netif *netif );
   unsigned portCHAR MacAddress[6];

   /* Default MAC addr. */
   MacAddress[0] = ETHERNET_CONF_ETHADDR0;
   MacAddress[1] = ETHERNET_CONF_ETHADDR1;
   MacAddress[2] = ETHERNET_CONF_ETHADDR2;
   MacAddress[3] = ETHERNET_CONF_ETHADDR3;
   MacAddress[4] = ETHERNET_CONF_ETHADDR4;
   MacAddress[5] = ETHERNET_CONF_ETHADDR5;

   /* pass the MAC address to MACB module */
   vMACBSetMACAddress( MacAddress );
   
#if LWIP_DHCP
  
  xIpAddr.addr  = 0;
  xNetMask.addr = 0;
  xNetMask.addr = 0;
  
  /* add data to netif */
  netif_add( &MACB_if, &xIpAddr, &xNetMask, &xGateway, NULL, ethernetif_init, tcpip_input );

  /* make it the default interface */
  netif_set_default( &MACB_if );
  
  /* Setup callback function for netif status change */
  netif_set_status_callback(&MACB_if, status_callback);

  /* bring it up */
  dhcp_start( &MACB_if );  
  print_dbg("LwIP: DHCP Started ...\n");

#if LWIP_DNS  
  /* Init DNS */  
  prvInitDNS();
  print_dbg("LwIP: DNS Started ...\n");
#endif
  
#else
   /* Default ip addr. */
   IP4_ADDR( &xIpAddr,ETHERNET_CONF_IPADDR0,ETHERNET_CONF_IPADDR1,ETHERNET_CONF_IPADDR2,ETHERNET_CONF_IPADDR3 );

   /* Default Subnet mask. */
   IP4_ADDR( &xNetMask,ETHERNET_CONF_NET_MASK0,ETHERNET_CONF_NET_MASK1,ETHERNET_CONF_NET_MASK2,ETHERNET_CONF_NET_MASK3 );

   /* Default Gw addr. */
   IP4_ADDR( &xGateway,ETHERNET_CONF_GATEWAY_ADDR0,ETHERNET_CONF_GATEWAY_ADDR1,ETHERNET_CONF_GATEWAY_ADDR2,ETHERNET_CONF_GATEWAY_ADDR3 );

   /* add data to netif */
   netif_add( &MACB_if, &xIpAddr, &xNetMask, &xGateway, NULL, ethernetif_init, tcpip_input );

   /* make it the default interface */
   netif_set_default( &MACB_if );

   /* bring it up */
   netif_set_up( &MACB_if );
   
  
#endif   
   
    
}

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