Hi, guys
I am trying to port E1000 82572EI Intel PCIE card in U-boot.
Now the phy can be aoto linked up and I can also receive data, but the
package I send can not go out.
I print some register:
roy :e1000_transmit tctl = 3003f0fa:
roy :e1000_transmit tarc0 = 7800403:
roy :e1000_transmit tarc1 = 7000403:
roy :e1000_transmit txdctl = 1010000:
roy :e1000_transmit tdfh = 1800:
roy :e1000_transmit tdft = 1800:
roy :e1000_transmit tdfpc = 0:
roy :e1000_transmit tx_tail = 0:
roy :e1000_transmit: , in 0:txp->lower.data 2a00000b
roy :e1000_transmit: , :txd_cmd b000000
roy :e1000_transmit: , :txp->upper.data 0
After the Transmit DD bit change to 1, I got
roy :e1000_transmit return tdfh = 1805:
roy :e1000_transmit return tdft = 1808:
roy :e1000_transmit tdfpc = 1:
roy :e1000_transmit: , in txp->upper.data 1000000
I believe the DD bit has been set in status register. The package has
been send to transmit FIFO. But the package seems to stay in the FIFO
(tdfh != tdft) . why it can not be send out?
I paste the correspondig code here:
static int
e1000_transmit(struct eth_device *nic, volatile void *packet, int
length)
{
struct e1000_hw *hw = nic->priv;
struct e1000_tx_desc *txp;
int i = 0;
int roy_tmp;
//dump the register
roy_tmp = E1000_READ_REG(hw, TCTL);
printf("roy :%s tctl = %x: \n", __FUNCTION__, roy_tmp );
roy_tmp = E1000_READ_REG(hw, TARC0);
printf("roy :%s tarc0 = %x: \n", __FUNCTION__, roy_tmp );
roy_tmp = E1000_READ_REG(hw, TARC1);
printf("roy :%s tarc1 = %x: \n", __FUNCTION__, roy_tmp );
roy_tmp = E1000_READ_REG(hw, TXDCTL);
printf("roy :%s txdctl = %x: \n", __FUNCTION__, roy_tmp );
roy_tmp = E1000_READ_REG(hw, TDFH);
printf("roy :%s tdfh = %x: \n", __FUNCTION__, roy_tmp );
roy_tmp = E1000_READ_REG(hw, TDFT);
printf("roy :%s tdft = %x: \n", __FUNCTION__, roy_tmp );
roy_tmp = E1000_READ_REG(hw, TDFPC);
printf("roy :%s tdfpc = %x: \n", __FUNCTION__, roy_tmp );
printf("roy :%s tx_tail = %x: \n", __FUNCTION__, tx_tail );
txp = tx_base + tx_tail;
tx_tail = (tx_tail + 1) % 8;
txp->buffer_addr = cpu_to_le64(virt_to_bus(packet));
// txp->lower.data = cpu_to_le32(E1000_TXD_CMD_RPS |
E1000_TXD_CMD_EOP |
// E1000_TXD_CMD_IFCS | length);
hw->txd_cmd |= E1000_TXD_CMD_RS;
txp->lower.data = cpu_to_le32(hw->txd_cmd | length);
printf("roy :%s: , in %x:txp->lower.data %x\n",
__FUNCTION__,i++, txp->lower.data);
printf("roy :%s: , :txd_cmd %x\n", __FUNCTION__, hw->txd_cmd);
txp->upper.data = 0;
E1000_WRITE_REG(hw, TDT, tx_tail);
E1000_WRITE_FLUSH(hw);
printf("roy :%s: , :txp->upper.data %x\n", __FUNCTION__,
txp->upper.data);
while (!(le32_to_cpu(txp->upper.data) & E1000_TXD_STAT_DD)) {
if (i++ > TOUT_LOOP) {
DEBUGOUT("e1000: tx timeout\n");
return 0;
}
udelay(10); /* give the nic a chance to write to the
register */
}
mdelay (1000);
//dump register
roy_tmp = E1000_READ_REG(hw, TDFH);
printf("roy :%s return tdfh = %x: \n", __FUNCTION__, roy_tmp );
roy_tmp = E1000_READ_REG(hw, TDFT);
printf("roy :%s return tdft = %x: \n", __FUNCTION__, roy_tmp );
roy_tmp = E1000_READ_REG(hw, TDFPC);
printf("roy :%s tdfpc = %x: \n", __FUNCTION__, roy_tmp );
printf("roy :%s: , in txp->upper.data %x\n", __FUNCTION__,
txp->upper.data);
printf("roy :%s: , :return\n", __FUNCTION__);
return 1;
}
Do you guys have any idea? What should I check or set?
Thanks.
Roy
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