static void xgbe_an_state_machine(struct work_struct *work)
{
struct xgbe_prv_data *pdata = container_of(work,
struct xgbe_prv_data,
an_work);
enum xgbe_an cur_state = pdata->an_state;
unsigned int int_reg, int_mask;
mutex_lock(&pdata->an_mutex);
/* Read the interrupt */
int_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_INT);
if (!int_reg)
goto out;
next_int:
if (int_reg & XGBE_AN_PG_RCV) {
pdata->an_state = XGBE_AN_PAGE_RECEIVED;
int_mask = XGBE_AN_PG_RCV;
} else if (int_reg & XGBE_AN_INC_LINK) {
pdata->an_state = XGBE_AN_INCOMPAT_LINK;
int_mask = XGBE_AN_INC_LINK;
} else if (int_reg & XGBE_AN_INT_CMPLT) {
pdata->an_state = XGBE_AN_COMPLETE;
int_mask = XGBE_AN_INT_CMPLT;
} else {
pdata->an_state = XGBE_AN_ERROR;
int_mask = 0;
}
/* Clear the interrupt to be processed */
int_reg &= ~int_mask;
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INT, int_reg);
pdata->an_result = pdata->an_state;
again:
netif_dbg(pdata, link, pdata->netdev, "AN %s\n",
xgbe_state_as_string(pdata->an_state));
cur_state = pdata->an_state;
switch (pdata->an_state) {
case XGBE_AN_READY:
pdata->an_supported = 0;
break;
case XGBE_AN_PAGE_RECEIVED:
pdata->an_state = xgbe_an_page_received(pdata);
pdata->an_supported++;
break;
case XGBE_AN_INCOMPAT_LINK:
pdata->an_supported = 0;
pdata->parallel_detect = 0;
pdata->an_state = xgbe_an_incompat_link(pdata);
break;
case XGBE_AN_COMPLETE:
pdata->parallel_detect = pdata->an_supported ? 0 : 1;
netif_dbg(pdata, link, pdata->netdev, "%s successful\n",
pdata->an_supported ? "Auto negotiation"
: "Parallel detection");
break;
case XGBE_AN_NO_LINK:
break;
default:
pdata->an_state = XGBE_AN_ERROR;
}
if (pdata->an_state == XGBE_AN_NO_LINK) {
int_reg = 0;
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INT, 0);
} else if (pdata->an_state == XGBE_AN_ERROR) {
netdev_err(pdata->netdev,
"error during auto-negotiation, state=%u\n",
cur_state);
int_reg = 0;
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INT, 0);
}
if (pdata->an_state >= XGBE_AN_COMPLETE) {
pdata->an_result = pdata->an_state;
pdata->an_state = XGBE_AN_READY;
pdata->kr_state = XGBE_RX_BPA;
pdata->kx_state = XGBE_RX_BPA;
pdata->an_start = 0;
netif_dbg(pdata, link, pdata->netdev, "AN result: %s\n",
xgbe_state_as_string(pdata->an_result));
}
if (cur_state != pdata->an_state)
goto again;
if (int_reg)
goto next_int;
out:
enable_irq(pdata->an_irq);
mutex_unlock(&pdata->an_mutex);
}
static void xgbe_an_state_machine(struct work_struct *work)
{
struct xgbe_prv_data *pdata = container_of(work,
struct xgbe_prv_data,
an_work);
enum xgbe_an cur_state = pdata->an_state;
mutex_lock(&pdata->an_mutex);
if (!pdata->an_int)
goto out;
next_int:
if (pdata->an_int & XGBE_AN_PG_RCV) {
pdata->an_state = XGBE_AN_PAGE_RECEIVED;
pdata->an_int &= ~XGBE_AN_PG_RCV;
} else if (pdata->an_int & XGBE_AN_INC_LINK) {
pdata->an_state = XGBE_AN_INCOMPAT_LINK;
pdata->an_int &= ~XGBE_AN_INC_LINK;
} else if (pdata->an_int & XGBE_AN_INT_CMPLT) {
pdata->an_state = XGBE_AN_COMPLETE;
pdata->an_int &= ~XGBE_AN_INT_CMPLT;
} else {
pdata->an_state = XGBE_AN_ERROR;
}
pdata->an_result = pdata->an_state;
again:
netif_dbg(pdata, link, pdata->netdev, "AN %s\n",
xgbe_state_as_string(pdata->an_state));
cur_state = pdata->an_state;
switch (pdata->an_state) {
case XGBE_AN_READY:
pdata->an_supported = 0;
break;
case XGBE_AN_PAGE_RECEIVED:
pdata->an_state = xgbe_an_page_received(pdata);
pdata->an_supported++;
break;
case XGBE_AN_INCOMPAT_LINK:
pdata->an_supported = 0;
pdata->parallel_detect = 0;
pdata->an_state = xgbe_an_incompat_link(pdata);
break;
case XGBE_AN_COMPLETE:
pdata->parallel_detect = pdata->an_supported ? 0 : 1;
netif_dbg(pdata, link, pdata->netdev, "%s successful\n",
pdata->an_supported ? "Auto negotiation"
: "Parallel detection");
break;
case XGBE_AN_NO_LINK:
break;
default:
pdata->an_state = XGBE_AN_ERROR;
}
if (pdata->an_state == XGBE_AN_NO_LINK) {
pdata->an_int = 0;
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INT, 0);
} else if (pdata->an_state == XGBE_AN_ERROR) {
netdev_err(pdata->netdev,
"error during auto-negotiation, state=%u\n",
cur_state);
pdata->an_int = 0;
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INT, 0);
}
if (pdata->an_state >= XGBE_AN_COMPLETE) {
pdata->an_result = pdata->an_state;
pdata->an_state = XGBE_AN_READY;
pdata->kr_state = XGBE_RX_BPA;
pdata->kx_state = XGBE_RX_BPA;
pdata->an_start = 0;
netif_dbg(pdata, link, pdata->netdev, "AN result: %s\n",
xgbe_state_as_string(pdata->an_result));
}
if (cur_state != pdata->an_state)
goto again;
if (pdata->an_int)
goto next_int;
out:
/* Enable AN interrupts on the way out */
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INTMASK, XGBE_AN_INT_MASK);
mutex_unlock(&pdata->an_mutex);
}