static int cs89x0_send_packet(struct net_device *ndev, struct sock_buff *skb)
{
int i;
__u16 isq_stat;
const __u16 *buff;
__UNUSED__ __u32 psr;
lock_irq_psr(psr);
writew(VA(CS8900_IOBASE + CS_TxCMD), 0x00);
writew(VA(CS8900_IOBASE + CS_TxLen), skb->size);
while (1) {
isq_stat = cs8900_inw(PP_BusST);
if (isq_stat & Rdy4TxNow)
break;
printf("BusST = 0x%04x\n", isq_stat);
}
buff = (const __u16 *)skb->data;
for (i = 0; i < skb->size; i += 2) {
writew(VA(CS8900_IOBASE + CS_DATA0), *buff);
buff++;
}
ndev->stat.tx_packets++;
unlock_irq_psr(psr);
return 0;
}
static struct sock_buff *sock_recv_packet(struct socket *sock)
{
__UNUSED__ __u32 psr;
struct sock_buff *skb;
struct list_node *first;
int to = 10000; // timeout
int ret;
char key;
while (1) {
ret = uart_read(CONFIG_UART_INDEX, (__u8 *)&key, 1, WAIT_ASYNC);
if (ret > 0 && key == CHAR_CTRL_C)
return NULL;
ndev_poll();
lock_irq_psr(psr);
if (!list_is_empty(&sock->rx_qu)) {
unlock_irq_psr(psr);
break;
}
unlock_irq_psr(psr);
if (sock->obstruct_flags == 1) {
to--;
if (to == 0)
break;
}
udelay(1000);
}
if (to > 0) {
lock_irq_psr(psr);
first = sock->rx_qu.next;
list_del_node(first);
unlock_irq_psr(psr);
skb = container_of(first, struct sock_buff, node);
return skb;
}