/* Phy status update state machine */
s32_t lpc_phy_sts_sm(struct netif *netif)
{
static u32_t sts;
s32_t changed = 0;
switch (phyustate) {
default:
case 0:
/* Read BMSR to clear faults */
lpc_mii_read_noblock(LAN8_BSR_REG);
phyustate = 1;
break;
case 1:
/* Wait for read status state */
if (!lpc_mii_is_busy()) {
/* Get PHY status with link state */
sts = lpc_mii_read_data();
lpc_mii_read_noblock(LAN8_PHYSPLCTL_REG);
phyustate = 2;
}
break;
case 2:
/* Wait for read status state */
if (!lpc_mii_is_busy()) {
/* Update PHY status */
changed = lpc_update_phy_sts(netif, sts, lpc_mii_read_data());
phyustate = 0;
}
break;
}
return changed;
}
/* Phy status update state machine */
uint32_t lpcPHYStsPoll(void)
{
switch (phyustate) {
default:
case 0:
/* Read BMSR to clear faults */
Chip_ENET_StartMIIRead(LPC_ETHERNET, DP8_PHY_STAT_REG);
physts &= ~PHY_LINK_CHANGED;
physts = physts | PHY_LINK_BUSY;
phyustate = 1;
break;
case 1:
/* Wait for read status state */
if (!Chip_ENET_IsMIIBusy(LPC_ETHERNET)) {
/* Update PHY status */
physts &= ~PHY_LINK_BUSY;
lpc_update_phy_sts(Chip_ENET_ReadMIIData(LPC_ETHERNET));
phyustate = 0;
}
break;
}
return physts;
}
/**
* Initialize the LAN8720 PHY.
*
* This function initialises the LAN8720 PHY. It will block until complete. This
* function is called as part of the EMAC driver Initialisation. Configuration
* of the PHY at startup is controlled by setting up configuration defines in
* lpc_emac_config.h.
*
* \param [in] netif NETIF structure
* \return ERR_OK if the setup was successful, otherwise ERR_TIMEOUT
*/
err_t lpc_phy_init(struct netif *netif) {
u32_t tmp = 2, tmp1;
s32_t i;
/**
* Set these to 2 so there will always be a change and lpc_update_phy_sts does
* something the first time its called
*/
olddphysts.phy_speed_100mbs = tmp;
olddphysts.phy_full_duplex = tmp;
olddphysts.phy_link_active = tmp;
phyustate = 0;
/* Only first read and write are checked for failure */
/* Put the LAN8720 in reset mode and wait for completion */
if (lpc_mii_write(LAN8_BCR_REG, LAN8_RESET) != 0)
return ERR_TIMEOUT;
i = 400;
while (i > 0) {
msDelay(1); /* 1 ms */
if (lpc_mii_read(LAN8_BCR_REG, &tmp) != 0)
return ERR_TIMEOUT;
if (!(tmp & (LAN8_RESET | LAN8_POWER_DOWN)))
i = -1;
else
i--;
}
/* Timeout? */
if (i == 0)
return ERR_TIMEOUT;
/* Setup link based on configuration options */
#if PHY_USE_AUTONEG==1
tmp = LAN8_AUTONEG;
#else
tmp = 0;
#endif
#if PHY_USE_100MBS==1
tmp |= LAN8_SPEED_SELECT;
#endif
#if PHY_USE_FULL_DUPLEX==1
tmp |= LAN8_DUPLEX_MODE;
#endif
lpc_mii_write(LAN8_BCR_REG, tmp);
/**
* No point in waiting around for the link to go active if the cable is
* unplugged, so set the current link status and exit.
*/
lpc_mii_read(LAN8_BSR_REG, &tmp);
lpc_mii_read(LAN8_PHYSPLCTL_REG, &tmp1);
lpc_update_phy_sts(netif, tmp, tmp1);
return ERR_OK;
}
/* Phy status update state machine */
s32_t lpc_phy_sts_sm(struct netif *netif)
{
s32_t changed = 0;
switch (phyustate) {
default:
case 0:
/* Read BMSR to clear faults */
lpc_mii_read_noblock(DP8_PHY_STAT_REG);
phyustate = 1;
break;
case 1:
/* Wait for read status state */
if (!lpc_mii_is_busy()) {
/* Update PHY status */
changed = lpc_update_phy_sts(netif, lpc_mii_read_data());
phyustate = 0;
}
break;
}
return changed;
}
