This is the netif driver from lwip port to AVR32
/* This source file is part of the ATMEL
AVR32-SoftwareFramework-AT32UC3A-1.4.0 Release */
/**
* @file
* Ethernet Interface Skeleton
*
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. 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.
* 3. 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.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <a...@sics.se>
*
*/
/*
* This file is a skeleton for developing Ethernet network interface
* drivers for lwIP. Add code to the low_level functions and do a
* search-and-replace for the word "ethernetif" to replace it with
* something that better describes your network interface.
*/
#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/mem.h"
#include "lwip/pbuf.h"
#include "lwip/sys.h"
#include <lwip/stats.h>
#include <lwip/snmp.h>
#include "netif/etharp.h"
#include "netif/ppp_oe.h"
#include "conf_eth.h"
#include "macb.h"
/* Define those to better describe your network interface. */
#define IFNAME0 'e'
#define IFNAME1 'n'
extern char DeviceName[20];
#define netifGUARD_BLOCK_NBTICKS ( 250 )
/**
* Helper struct to hold private data used to operate your ethernet
interface.
* Keeping the ethernet address of the MAC in this struct is not necessary
* as it is already kept in the struct netif.
* But this is only an example, anyway...
*/
struct ethernetif {
struct eth_addr *ethaddr;
/* Add whatever per-interface state that is needed here. */
};
/* Forward declarations. */
static void ethernetif_input(void * );
/**
* In this function, the hardware should be initialized.
* Called from ethernetif_init().
*
* @param netif the already initialized lwip network interface structure
* for this ethernetif
*/
static void
low_level_init(struct netif *netif)
{
unsigned portBASE_TYPE uxPriority;
/* set MAC hardware address length */
netif->hwaddr_len = ETHARP_HWADDR_LEN;
/* set MAC hardware address */
/*netif->hwaddr[0] = ETHERNET_CONF_ETHADDR0;
netif->hwaddr[1] = ETHERNET_CONF_ETHADDR1;
netif->hwaddr[2] = ETHERNET_CONF_ETHADDR2;
netif->hwaddr[3] = ETHERNET_CONF_ETHADDR3;
netif->hwaddr[4] = ETHERNET_CONF_ETHADDR4;
netif->hwaddr[5] = ETHERNET_CONF_ETHADDR5;*/
/* maximum transfer unit */
netif->mtu = 1500;
/* device capabilities */
/* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */
netif->flags |= NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP;
/* Do whatever else is needed to initialize interface. */
/* Initialise the MACB. */
// NOTE: This routine contains code that polls status bits. If the
Ethernet
// cable is not plugged in then this can take a considerable time. To
prevent
// this from starving lower priority tasks of processing time we lower our
// priority prior to the call, then raise it back again once the
initialization
// is complete.
// Read the priority of the current task.
uxPriority = uxTaskPriorityGet( NULL );
// Set the priority of the current task to the lowest possible.
vTaskPrioritySet( NULL, tskIDLE_PRIORITY );
// Init the MACB interface.
while( xMACBInit(&AVR32_MACB) == FALSE )
{
__asm__ __volatile__ ( "nop" );
}
// Restore the priority of the current task.
vTaskPrioritySet( NULL, uxPriority );
/* Create the task that handles the MACB input packets. */
sys_thread_new( "ETHINT", ethernetif_input, netif,
netifINTERFACE_TASK_STACK_SIZE,
netifINTERFACE_TASK_PRIORITY );
}
/**
* This function should do the actual transmission of the packet. The packet
is
* contained in the pbuf that is passed to the function. This pbuf
* might be chained.
*
* @param netif the lwip network interface structure for this ethernetif
* @param p the MAC packet to send (e.g. IP packet including MAC addresses
and type)
* @return ERR_OK if the packet could be sent
* an err_t value if the packet couldn't be sent
*
* @note Returning ERR_MEM here if a DMA queue of your MAC is full can lead
to
* strange results. You might consider waiting for space in the DMA
queue
* to become available since the stack doesn't retry to send a packet
* dropped because of memory failure (except for the TCP timers).
*/
static err_t
low_level_output(struct netif *netif, struct pbuf *p)
{
struct pbuf *q;
static xSemaphoreHandle xTxSemaphore = NULL;
err_t xReturn = ERR_OK;
( void )netif; // Unused param, avoid a compiler warning.
if( xTxSemaphore == NULL )
{
vSemaphoreCreateBinary( xTxSemaphore );
}
#if ETH_PAD_SIZE
pbuf_header( p, -ETH_PAD_SIZE ); /* drop the padding word */
#endif
/* Access to the MACB is guarded using a semaphore. */
if( xSemaphoreTake( xTxSemaphore, netifGUARD_BLOCK_NBTICKS ) )
{
for( q = p; q != NULL; q = q->next )
{
/* Send the data from the pbuf to the interface, one pbuf at a
time. The size of the data in each pbuf is kept in the ->len
variable. if q->next == NULL then this is the last pbuf in the
chain. */
if( !lMACBSend(&AVR32_MACB, q->payload, q->len, ( q->next == NULL ) )
)
{
xReturn = ~ERR_OK;
}
}
xSemaphoreGive( xTxSemaphore );
}
#if ETH_PAD_SIZE
pbuf_header( p, ETH_PAD_SIZE ); /* reclaim the padding word */
#endif
LINK_STATS_INC(link.xmit); // Traces
return ERR_OK;
}
/**
* Should allocate a pbuf and transfer the bytes of the incoming
* packet from the interface into the pbuf.
*
* @param netif the lwip network interface structure for this ethernetif
* @return a pbuf filled with the received packet (including MAC header)
* NULL on memory error
*/
static struct pbuf *low_level_input(struct netif *netif)
{
struct pbuf *p = NULL;
struct pbuf *q;
u16_t len;
static xSemaphoreHandle xRxSemaphore = NULL;
/* Parameter not used. */
( void ) netif;
if( xRxSemaphore == NULL )
{
vSemaphoreCreateBinary( xRxSemaphore );
}
/* Access to the MACB is guarded using a semaphore. */
if( xSemaphoreTake( xRxSemaphore, netifGUARD_BLOCK_NBTICKS ) )
{
/* Obtain the size of the packet. */
len = ulMACBInputLength();
if( len )
{
#if ETH_PAD_SIZE
len += ETH_PAD_SIZE; /* allow room for Ethernet padding */
#endif
/* We allocate a pbuf chain of pbufs from the pool. */
p = pbuf_alloc( PBUF_RAW, len, PBUF_POOL );
if( p != NULL )
{
#if ETH_PAD_SIZE
pbuf_header( p, -ETH_PAD_SIZE ); /* drop the padding word */
#endif
/* Let the driver know we are going to read a new packet. */
vMACBRead( NULL, 0, len );
/* We iterate over the pbuf chain until we have read the entire
packet into the pbuf. */
for( q = p; q != NULL; q = q->next )
{
/* Read enough bytes to fill this pbuf in the chain. The
available data in the pbuf is given by the q->len variable. */
vMACBRead( q->payload, q->len, len );
}
#if ETH_PAD_SIZE
pbuf_header( p, ETH_PAD_SIZE ); /* reclaim the padding word */
#endif
LINK_STATS_INC(link.recv);
}
else
{
LINK_STATS_INC(link.memerr);
LINK_STATS_INC(link.drop);
}
}
xSemaphoreGive( xRxSemaphore );
}
return p;
}
/**
* This function should be called when a packet is ready to be read
* from the interface. It uses the function low_level_input() that
* should handle the actual reception of bytes from the network
* interface. Then the type of the received packet is determined and
* the appropriate input function is called.
*
* @param netif the lwip network interface structure for this ethernetif
*/
static void ethernetif_input(void * pvParameters)
{
struct netif *netif = (struct netif *)pvParameters;
struct pbuf *p;
for( ;; )
{
do
{
/* move received packet into a new pbuf */
p = low_level_input( netif );
if( p == NULL )
{
/* No packet could be read. Wait a for an interrupt to tell us
there is more data available. */
vMACBWaitForInput(100);
}
}while( p == NULL );
if( ERR_OK != ethernet_input( p, netif ) )
{
pbuf_free(p);
p = NULL;
}
}
}
/********
* Calling etharp_tmr() every ARP_TMR_INTERVAL.
*
*/
/*static void
arp_timer(void *arg)
{
etharp_tmr();
sys_timeout(ARP_TMR_INTERVAL, (sys_timeout_handler)arp_timer, NULL);
}*/
/**
* Should be called at the beginning of the program to set up the
* network interface. It calls the function low_level_init() to do the
* actual setup of the hardware.
*
* This function should be passed as a parameter to netif_add().
*
* @param netif the lwip network interface structure for this ethernetif
* @return ERR_OK if the loopif is initialized
* ERR_MEM if private data couldn't be allocated
* any other err_t on error
*/
err_t
ethernetif_init(struct netif *netif)
{
/* struct ethernetif *ethernetif; */
LWIP_ASSERT("netif != NULL", (netif != NULL));
/*ethernetif = (struct ethernetif *)mem_malloc(sizeof(struct ethernetif));
if (ethernetif == NULL)
{
LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_init: out of memory\n"));
return ERR_MEM;
}*/
#if LWIP_NETIF_HOSTNAME
/* Initialize interface hostname */
netif->hostname = DeviceName;
#endif /* LWIP_NETIF_HOSTNAME */
/*
* Initialize the snmp variables and counters inside the struct netif.
* The last argument should be replaced with your link speed, in units
* of bits per second.
*/
#if LWIP_SNMP
NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, 100000000);
#endif /* LWIP_SNMP */
netif->state = NULL; /* ethernetif;
ethernetif->ethaddr = (struct eth_addr *)&(netif->hwaddr[0]); */
netif->name[0] = IFNAME0;
netif->name[1] = IFNAME1;
/* We directly use etharp_output() here to save a function call.
* You can instead declare your own function an call etharp_output()
* from it if you have to do some checks before sending (e.g. if link
* is available...) */
netif->output = etharp_output;
netif->linkoutput = low_level_output;
/* initialize the hardware */
low_level_init(netif);
/* DONE BY THE LWIP TASK.
// Initializes the ARP table and queue.
etharp_init();
// You must call etharp_tmr at a ARP_TMR_INTERVAL (5 seconds) regular
interval
// after this initialization.
sys_timeout(ARP_TMR_INTERVAL, (sys_timeout_handler)arp_timer, NULL);
*/
return ERR_OK;
}
Simon Goldschmidt wrote:
>
> patelbaroda wrote:
>> So instead of using
>>
>> "
>> netif_add(&MACB_if,&xIpAddr,&xNetMask,&xGateway, NULL, ethernetif_init,
>> tcpip_input ); netif_set_default(&MACB_if );
>> netif_set_up(&MACB_if );
>> "
>>
>> I use,
>>
>> "
>> do_netifapi_netif_add();
>>
> You can do it that way, but netif_set_up() is then still called from the
> wrong thread! The simple way is (as I wrote before) to move the
> netif_add/netif_set_up code into the function tcpip_init_done(), which
> is called from tcpip_thread when it is initialized and sets the
> semaphore used to block the other thread (that calls tcpip_init()).
>
> Simon
>
>
> _______________________________________________
> lwip-users mailing list
> lwip-users@nongnu.org
> http://lists.nongnu.org/mailman/listinfo/lwip-users
>
>
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