void
cpsw_stop(struct ifnet *ifp)
{
struct cpsw_softc * const sc = ifp->if_softc;
struct cpsw_ring_data * const rdp = sc->sc_rdp;
u_int i;
#if 0
/* XXX find where disable comes from */
printf("%s: ifp %p disable %d\n", __func__, ifp, disable);
#endif
if ((ifp->if_flags & IFF_RUNNING) == 0)
return;
timeout_del(&sc->sc_tick);
mii_down(&sc->sc_mii);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_TX_INTMASK_CLEAR, 1);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_RX_INTMASK_CLEAR, 1);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_WR_C_TX_EN(0), 0x0);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_WR_C_RX_EN(0), 0x0);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_WR_C_MISC_EN(0), 0x1F);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_TX_TEARDOWN, 0);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_RX_TEARDOWN, 0);
i = 0;
while ((sc->sc_txrun || sc->sc_rxrun) && i < 10000) {
delay(10);
if ((sc->sc_txrun == true) && cpsw_txintr(sc) == 0)
sc->sc_txrun = false;
if ((sc->sc_rxrun == true) && cpsw_rxintr(sc) == 0)
sc->sc_rxrun = false;
i++;
}
/* printf("%s toredown complete in %u\n", __func__, i); */
/* Reset wrapper */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_WR_SOFT_RESET, 1);
while(bus_space_read_4(sc->sc_bst, sc->sc_bsh, CPSW_WR_SOFT_RESET) & 1);
/* Reset SS */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_SS_SOFT_RESET, 1);
while(bus_space_read_4(sc->sc_bst, sc->sc_bsh, CPSW_SS_SOFT_RESET) & 1);
for (i = 0; i < 2; i++) {
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_SL_SOFT_RESET(i), 1);
while(bus_space_read_4(sc->sc_bst, sc->sc_bsh, CPSW_SL_SOFT_RESET(i)) & 1);
}
/* Reset CPDMA */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_SOFT_RESET, 1);
while(bus_space_read_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_SOFT_RESET) & 1);
/* Release any queued transmit buffers. */
for (i = 0; i < CPSW_NTXDESCS; i++) {
bus_dmamap_unload(sc->sc_bdt, rdp->tx_dm[i]);
m_freem(rdp->tx_mb[i]);
rdp->tx_mb[i] = NULL;
}
ifp->if_flags &= ~(IFF_RUNNING|IFF_OACTIVE);
ifp->if_timer = 0;
/* XXX Not sure what this is doing calling disable here
where is disable set?
*/
#if 0
if (!disable)
return;
#endif
for (i = 0; i < CPSW_NRXDESCS; i++) {
bus_dmamap_unload(sc->sc_bdt, rdp->rx_dm[i]);
m_freem(rdp->rx_mb[i]);
rdp->rx_mb[i] = NULL;
}
}
/*============================================================================*
* lan8710a_init_hw *
*============================================================================*/
static int
lan8710a_init_hw(netdriver_addr_t * addr, unsigned int instance)
{
int r, i;
/*
* Set the interrupt handler and policy. Do not automatically
* re-enable interrupts. Return the IRQ line number on interrupts.
*/
lan8710a_state.irq_rx_hook = RX_INT;
if ((r = sys_irqsetpolicy(LAN8710A_RX_INTR, 0,
&lan8710a_state.irq_rx_hook)) != OK) {
panic("sys_irqsetpolicy failed: %d", r);
}
lan8710a_state.irq_tx_hook = TX_INT;
if ((r = sys_irqsetpolicy(LAN8710A_TX_INTR, 0,
&lan8710a_state.irq_tx_hook)) != OK) {
panic("sys_irqsetpolicy failed: %d", r);
}
/* Reset hardware. */
lan8710a_reset_hw();
/*
* Select the Interface (GMII/RGMII/MII) Mode in the Control Module.
* Port1 GMII/MII Mode, Port2 not used.
*/
lan8710a_reg_write(GMII_SEL, (GMII2_SEL_BIT1 | GMII2_SEL_BIT0));
/*
* Configure pads (PIN muxing) as per the Interface Selected using the
* appropriate pin muxing conf_xxx registers in the Control Module.
*
* CONF_MOD_SLEW_CTRL when 0 - Fast Mode, when 1 - Slow Mode
* CONF_MOD_RX_ACTIVE when 0 - Only output, when 1 - Also input
* CONF_MOD_PU_TYPESEL when 0 - Pull-down, when 1 - Pull-up
* CONF_MOD_PUDEN when 0 Pull* enabled, when 1 Pull* disabled
* CONF_MOD_MMODE_MII selects pin to work for MII interface
*/
lan8710a_reg_unset(CONF_MII1_COL, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_COL, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_COL, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MII1_COL, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_COL, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_CRS, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_CRS, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_CRS, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MII1_CRS, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_CRS, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_RX_ER, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_RX_ER, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_RX_ER, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MII1_RX_ER, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_RX_ER, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_TX_EN, CONF_MOD_SLEW_CTRL);
lan8710a_reg_unset(CONF_MII1_TX_EN, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_TX_EN, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_TX_EN, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_RX_DV, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_RX_DV, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_RX_DV, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MII1_RX_DV, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_RX_DV, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_TXD3, CONF_MOD_SLEW_CTRL);
lan8710a_reg_unset(CONF_MII1_TXD3, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_TXD3, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_TXD3, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_TXD2, CONF_MOD_SLEW_CTRL);
lan8710a_reg_unset(CONF_MII1_TXD2, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_TXD2, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_TXD2, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_TXD1, CONF_MOD_SLEW_CTRL);
lan8710a_reg_unset(CONF_MII1_TXD1, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_TXD1, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_TXD1, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_TXD0, CONF_MOD_SLEW_CTRL);
lan8710a_reg_unset(CONF_MII1_TXD0, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_TXD0, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_TXD0, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_TX_CLK, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_TX_CLK, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_TX_CLK, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_TX_CLK, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_RX_CLK, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_RX_CLK, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_RX_CLK, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_RX_CLK, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_RXD3, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_RXD3, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_RXD3, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MII1_RXD3, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_RXD3, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_RXD2, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_RXD2, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_RXD2, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MII1_RXD2, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_RXD2, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_RXD1, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_RXD1, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_RXD1, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MII1_RXD1, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_RXD1, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_RXD0, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_RXD0, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_RXD0, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MII1_RXD0, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_RXD0, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MDIO, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MDIO, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MDIO, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MDIO, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MDIO, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MDC, CONF_MOD_SLEW_CTRL);
lan8710a_reg_unset(CONF_MDC, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MDC, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MDC, CONF_MOD_MMODE_MII);
/* Apply soft reset to 3PSW Subsytem, CPSW_3G, CPGMAC_SL, and CPDMA. */
lan8710a_reg_write(CPSW_SS_SOFT_RESET, SOFT_RESET);
lan8710a_reg_write(CPSW_SL_SOFT_RESET(1), SOFT_RESET);
lan8710a_reg_write(CPSW_SL_SOFT_RESET(2), SOFT_RESET);
/* Wait for software resets completion */
while ((lan8710a_reg_read(CPSW_SS_SOFT_RESET) & SOFT_RESET) ||
(lan8710a_reg_read(CPSW_SL_SOFT_RESET(1)) & SOFT_RESET) ||
(lan8710a_reg_read(CPSW_SL_SOFT_RESET(2)) & SOFT_RESET));
/* Configure the Statistics Port Enable register. */
/* Enable port 0 and 1 statistics. */
lan8710a_reg_write(CPSW_SS_STAT_PORT_EN, (CPSW_P1_STAT_EN |
CPSW_P0_STAT_EN));
/*
* Configure the ALE.
* Enabling Ale.
* All packets received on ports 1 are
* sent to the host (only to the host).
*/
lan8710a_reg_write(CPSW_ALE_CONTROL, (CPSW_ALE_ENABLE |
CPSW_ALE_BYPASS));
/* Port 0 (host) in forwarding mode. */
lan8710a_reg_write(CPSW_ALE_PORTCTL0, CPSW_ALE_PORT_FWD);
/* Port 1 in forwarding mode. */
lan8710a_reg_write(CPSW_ALE_PORTCTL1, CPSW_ALE_PORT_FWD);
/*
* Configure CPSW_SL Register
* Full duplex mode.
*/
lan8710a_reg_write(CPSW_SL_MACCONTROL(1), CPSW_SL_FULLDUPLEX);
/* Initialize MDIO Protocol */
lan8710a_init_mdio();
/* Getting MAC Address */
lan8710a_init_addr(addr, instance);
/* Initialize descriptors */
lan8710a_init_desc();
/* Reset and initialize CPDMA */
lan8710a_dma_reset_init();
/*
* Configure the Interrupts.
* Routing all channel Rx int to RX_PULSE signal.
*/
lan8710a_reg_set(CPSW_WR_C0_RX_EN, CPSW_FIRST_CHAN_INT);
/*
* Enabling LAN8710A Auto-negotiation
*/
lan8710a_phy_write(LAN8710A_CTRL_REG, LAN8710A_AUTO_NEG);
/* Waiting for auto-negotiaion completion. */
for (i = 0; !(lan8710a_phy_read(LAN8710A_STATUS_REG) &
LAN8710A_AUTO_NEG_COMPL); ++i) {
if (i == 100) {
LAN8710A_DEBUG_PRINT(("Autonegotiation failed"));
break;
}
micro_delay(1666666);
}
/* GMII RX and TX release from reset. */
lan8710a_reg_set(CPSW_SL_MACCONTROL(1), CPSW_SL_GMII_EN);
/* Enable interrupts. */
lan8710a_enable_interrupt(RX_INT | TX_INT);
return TRUE;
}
int
cpsw_init(struct ifnet *ifp)
{
struct cpsw_softc * const sc = ifp->if_softc;
struct arpcom *ac = &sc->sc_ac;
struct mii_data * const mii = &sc->sc_mii;
int i;
cpsw_stop(ifp);
sc->sc_txnext = 0;
sc->sc_txhead = 0;
/* Reset wrapper */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_WR_SOFT_RESET, 1);
while(bus_space_read_4(sc->sc_bst, sc->sc_bsh, CPSW_WR_SOFT_RESET) & 1);
/* Reset SS */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_SS_SOFT_RESET, 1);
while(bus_space_read_4(sc->sc_bst, sc->sc_bsh, CPSW_SS_SOFT_RESET) & 1);
/* Clear table (30) and enable ALE(31) and set passthrough (4) */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_ALE_CONTROL, (3 << 30) | 0x10);
/* Reset and init Sliver port 1 and 2 */
for (i = 0; i < 2; i++) {
/* Reset */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_SL_SOFT_RESET(i), 1);
while(bus_space_read_4(sc->sc_bst, sc->sc_bsh, CPSW_SL_SOFT_RESET(i)) & 1);
/* Set Slave Mapping */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_SL_RX_PRI_MAP(i), 0x76543210);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_PORT_P_TX_PRI_MAP(i+1), 0x33221100);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_SL_RX_MAXLEN(i), 0x5f2);
/* Set MAC Address */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_PORT_P_SA_HI(i+1),
ac->ac_enaddr[0] | (ac->ac_enaddr[1] << 8) |
(ac->ac_enaddr[2] << 16) | (ac->ac_enaddr[3] << 24));
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_PORT_P_SA_LO(i+1),
ac->ac_enaddr[4] | (ac->ac_enaddr[5] << 8));
/* Set MACCONTROL for ports 0,1: FULLDUPLEX(1), GMII_EN(5),
IFCTL_A(15), IFCTL_B(16) FIXME */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_SL_MACCONTROL(i),
1 | (1<<5) | (1<<15) | (1<<16));
/* Set ALE port to forwarding(3) */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_ALE_PORTCTL(i+1), 3);
}
/* Set Host Port Mapping */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_PORT_P0_CPDMA_TX_PRI_MAP, 0x76543210);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_PORT_P0_CPDMA_RX_CH_MAP, 0);
/* Set ALE port to forwarding(3) */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_ALE_PORTCTL(0), 3);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_SS_PTYPE, 0);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_SS_STAT_PORT_EN, 7);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_SOFT_RESET, 1);
while(bus_space_read_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_SOFT_RESET) & 1);
for (i = 0; i < 8; i++) {
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_TX_HDP(i), 0);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_RX_HDP(i), 0);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_TX_CP(i), 0);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_RX_CP(i), 0);
}
bus_space_set_region_4(sc->sc_bst, sc->sc_bsh_txdescs, 0, 0,
CPSW_CPPI_RAM_TXDESCS_SIZE/4);
sc->sc_txhead = 0;
sc->sc_txnext = 0;
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_RX_FREEBUFFER(0), 0);
bus_space_set_region_4(sc->sc_bst, sc->sc_bsh_rxdescs, 0, 0,
CPSW_CPPI_RAM_RXDESCS_SIZE/4);
/* Initialize RX Buffer Descriptors */
cpsw_set_rxdesc_next(sc, RXDESC_PREV(0), 0);
for (i = 0; i < CPSW_NRXDESCS; i++) {
cpsw_new_rxbuf(sc, i);
}
sc->sc_rxhead = 0;
/* align layer 3 header to 32-bit */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_RX_BUFFER_OFFSET, ETHER_ALIGN);
/* Clear all interrupt Masks */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_RX_INTMASK_CLEAR, 0xFFFFFFFF);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_TX_INTMASK_CLEAR, 0xFFFFFFFF);
/* Enable TX & RX DMA */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_TX_CONTROL, 1);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_RX_CONTROL, 1);
/* Enable TX and RX interrupt receive for core 0 */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_WR_C_TX_EN(0), 1);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_WR_C_RX_EN(0), 1);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_WR_C_MISC_EN(0), 0x1F);
/* Enable host Error Interrupt */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_DMA_INTMASK_SET, 2);
/* Enable interrupts for TX and RX Channel 0 */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_TX_INTMASK_SET, 1);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_RX_INTMASK_SET, 1);
/* Ack stalled irqs */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_CPDMA_EOI_VECTOR, CPSW_INTROFF_RXTH);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_CPDMA_EOI_VECTOR, CPSW_INTROFF_RX);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_CPDMA_EOI_VECTOR, CPSW_INTROFF_TX);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_CPDMA_EOI_VECTOR, CPSW_INTROFF_MISC);
/* Initialze MDIO - ENABLE, PREAMBLE=0, FAULTENB, CLKDIV=0xFF */
/* TODO Calculate MDCLK=CLK/(CLKDIV+1) */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, MDIOCONTROL, (1<<30) | (1<<18) | 0xFF);
mii_mediachg(mii);
/* Write channel 0 RX HDP */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, CPSW_CPDMA_RX_HDP(0), cpsw_rxdesc_paddr(sc, 0));
sc->sc_rxrun = true;
sc->sc_rxeoq = false;
sc->sc_txrun = true;
sc->sc_txeoq = true;
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
timeout_add_sec(&sc->sc_tick, 1);
return 0;
}