/**************************************************************************
w89c840_poll - Wait for a frame
***************************************************************************/
static int w89c840_poll(struct nic *nic, int retrieve)
{
/* return true if there's an ethernet packet ready to read */
/* nic->packet should contain data on return */
/* nic->packetlen should contain length of data */
int packet_received = 0;
#if defined(W89C840_DEBUG)
u32 intr_status = readl(ioaddr + IntrStatus);
#endif
do {
/* Code from netdev_rx(dev) */
int entry = w840private.cur_rx % RX_RING_SIZE;
struct w840_rx_desc *desc = w840private.rx_head_desc;
s32 status = desc->status;
if (status & DescOwn) {
/* DescOwn bit is still set, we should wait for RX to complete */
packet_received = 0;
break;
}
if ( !retrieve ) {
packet_received = 1;
break;
}
if ((status & 0x38008300) != 0x0300) {
if ((status & 0x38000300) != 0x0300) {
/* Ingore earlier buffers. */
if ((status & 0xffff) != 0x7fff) {
printf("winbond-840 : Oversized Ethernet frame spanned "
"multiple buffers, entry %d status %X !\n",
w840private.cur_rx, (unsigned int) status);
}
} else if (status & 0x8000) {
/* There was a fatal error. */
#if defined(W89C840_DEBUG)
printf("winbond-840 : Receive error, Rx status %X :", status);
if (status & 0x0890) {
printf(" RXLEN_ERROR");
}
if (status & 0x004C) {
printf(", FRAME_ERROR");
}
if (status & 0x0002) {
printf(", CRC_ERROR");
}
printf("\n");
#endif
/* Simpy do a reset now... */
w89c840_reset(nic);
packet_received = 0;
break;
}
} else {
/* Omit the four octet CRC from the length. */
int pkt_len = ((status >> 16) & 0x7ff) - 4;
#if defined(W89C840_DEBUG)
printf(" netdev_rx() normal Rx pkt ring %d length %d status %X\n", entry, pkt_len, status);
#endif
nic->packetlen = pkt_len;
/* Check if the packet is long enough to accept without copying
to a minimally-sized skbuff. */
memcpy(nic->packet, le32desc_to_virt(w840private.rx_ring[entry].buffer1), pkt_len);
packet_received = 1;
/* Release buffer to NIC */
w840private.rx_ring[entry].status = DescOwn;
#if defined(W89C840_DEBUG)
/* You will want this info for the initial debug. */
printf(" Rx data %hhX:%hhX:%hhX:%hhX:%hhX:"
"%hhX %hhX:%hhX:%hhX:%hhX:%hhX:%hhX %hhX%hhX "
"%hhX.%hhX.%hhX.%hhX.\n",
nic->packet[0], nic->packet[1], nic->packet[2], nic->packet[3],
nic->packet[4], nic->packet[5], nic->packet[6], nic->packet[7],
nic->packet[8], nic->packet[9], nic->packet[10],
nic->packet[11], nic->packet[12], nic->packet[13],
nic->packet[14], nic->packet[15], nic->packet[16],
nic->packet[17]);
#endif
}
entry = (++w840private.cur_rx) % RX_RING_SIZE;
w840private.rx_head_desc = &w840private.rx_ring[entry];
} while (0);
return packet_received;
}
static int w89c840_poll(struct nic *nic)
{
int packet_received = 0;
u32 intr_status = readl(ioaddr + IntrStatus);
do {
int entry = w840private.cur_rx % RX_RING_SIZE;
struct w840_rx_desc *desc = w840private.rx_head_desc;
s32 status = desc->status;
if (status & DescOwn) {
packet_received = 0;
break;
}
if ((status & 0x38008300) != 0x0300) {
if ((status & 0x38000300) != 0x0300) {
if ((status & 0xffff) != 0x7fff) {
printf("winbond-840 : Oversized Ethernet frame spanned "
"multiple buffers, entry %d status %X !\n",
w840private.cur_rx, status);
}
} else if (status & 0x8000) {
#if defined(W89C840_DEBUG)
printf("winbond-840 : Receive error, Rx status %X :", status);
if (status & 0x0890) {
printf(" RXLEN_ERROR");
}
if (status & 0x004C) {
printf(", FRAME_ERROR");
}
if (status & 0x0002) {
printf(", CRC_ERROR");
}
printf("\n");
#endif
w89c840_reset(nic);
packet_received = 0;
break;
}
} else {
int pkt_len = ((status >> 16) & 0x7ff) - 4;
#if defined(W89C840_DEBUG)
printf(" netdev_rx() normal Rx pkt ring %d length %d status %X\n", entry, pkt_len, status);
#endif
nic->packetlen = pkt_len;
memcpy(nic->packet, le32desc_to_virt(w840private.rx_ring[entry].buffer1), pkt_len);
packet_received = 1;
w840private.rx_ring[entry].status = DescOwn;
#if defined(W89C840_DEBUG)
printf(" Rx data %hhX:%hhX:%hhX:%hhX:%hhX:"
"%hhX %hhX:%hhX:%hhX:%hhX:%hhX:%hhX %hhX%hhX "
"%hhX.%hhX.%hhX.%hhX.\n",
nic->packet[0], nic->packet[1], nic->packet[2], nic->packet[3],
nic->packet[4], nic->packet[5], nic->packet[6], nic->packet[7],
nic->packet[8], nic->packet[9], nic->packet[10],
nic->packet[11], nic->packet[12], nic->packet[13],
nic->packet[14], nic->packet[15], nic->packet[16],
nic->packet[17]);
#endif
}
entry = (++w840private.cur_rx) % RX_RING_SIZE;
w840private.rx_head_desc = &w840private.rx_ring[entry];
} while (0);
if (intr_status & (AbnormalIntr | TxFIFOUnderflow | IntrPCIErr |TimerInt | IntrTxStopped)) {
handle_intr(intr_status);
}
return packet_received;
}