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Introduce new eth_receive routine 

The purpose of this routine is receiving a single network frame, outside of
U-Boot's NetLoop(). Exporting it to standalone programs that run on top of
U-Boot will let them utilise networking facilities. For sending a raw frame
the already existing eth_send() can be used.

The direct consumer of this routine is the newly introduced API layer for
external applications (enabled with CONFIG_API).

Signed-off-by: Rafal Jaworowski <raj@semihalf.com>
Signed-off-by: Piotr Kruszynski <ppk@semihalf.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
This commit is contained in:
Rafal Jaworowski 2007-12-27 18:19:02 +01:00 committed by Ben Warren
parent 5c740711f0
commit f85b607105
3 changed files with 71 additions and 0 deletions
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3
include/net.h
View File

@ -122,6 +122,9 @@ extern void eth_set_enetaddr(int num, char* a); /* Set new MAC address */
extern int eth_init(bd_t *bis); /* Initialize the device */
extern int eth_send(volatile void *packet, int length); /* Send a packet */
#ifdef CONFIG_API
extern int eth_receive(volatile void *packet, int length); /* Receive a packet */
#endif
extern int eth_rx(void); /* Check for received packets */
extern void eth_halt(void); /* stop SCC */
extern char *eth_get_name(void); /* get name of current device */

58
net/eth.c
View File

@ -62,6 +62,17 @@ extern int bfin_EMAC_initialize(bd_t *);
extern int atstk1000_eth_initialize(bd_t *);
extern int mcffec_initialize(bd_t*);
#ifdef CONFIG_API
extern void (*push_packet)(volatile void *, int);
static struct {
uchar data[PKTSIZE];
int length;
} eth_rcv_bufs[PKTBUFSRX];
static unsigned int eth_rcv_current = 0, eth_rcv_last = 0;
#endif
static struct eth_device *eth_devices, *eth_current;
struct eth_device *eth_get_dev(void)
@ -457,6 +468,53 @@ int eth_rx(void)
return eth_current->recv(eth_current);
}
#ifdef CONFIG_API
static void eth_save_packet(volatile void *packet, int length)
{
volatile char *p = packet;
int i;
if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
return;
if (PKTSIZE < length)
return;
for (i = 0; i < length; i++)
eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
eth_rcv_bufs[eth_rcv_last].length = length;
eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
}
int eth_receive(volatile void *packet, int length)
{
volatile char *p = packet;
void *pp = push_packet;
int i;
if (eth_rcv_current == eth_rcv_last) {
push_packet = eth_save_packet;
eth_rx();
push_packet = pp;
if (eth_rcv_current == eth_rcv_last)
return -1;
}
if (length < eth_rcv_bufs[eth_rcv_current].length)
return -1;
length = eth_rcv_bufs[eth_rcv_current].length;
for (i = 0; i < length; i++)
p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
return length;
}
#endif /* CONFIG_API */
void eth_try_another(int first_restart)
{
static struct eth_device *first_failed = NULL;

10
net/net.c
View File

@ -137,6 +137,9 @@ uchar NetBcastAddr[6] = /* Ethernet bcast address */
{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
uchar NetEtherNullAddr[6] =
{ 0, 0, 0, 0, 0, 0 };
#ifdef CONFIG_API
void (*push_packet)(volatile void *, int len) = 0;
#endif
#if defined(CONFIG_CMD_CDP)
uchar NetCDPAddr[6] = /* Ethernet bcast address */
{ 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc };
@ -1161,6 +1164,13 @@ NetReceive(volatile uchar * inpkt, int len)
if (len < ETHER_HDR_SIZE)
return;
#ifdef CONFIG_API
if (push_packet) {
(*push_packet)(inpkt, len);
return;
}
#endif
#if defined(CONFIG_CMD_CDP)
/* keep track if packet is CDP */
iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;