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skge: XM PHY handling fixes 

Change how PHY is managed on SysKonnect fibre based boards.
Poll for PHY coming up 1 per second, but use interrupt to detect loss.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
hifive-unleashed-5.1
Stephen Hemminger 2007-10-16 12:15:51 -07:00 committed by Jeff Garzik
parent 60b24b5179
commit 501fb72d05
2 changed files with 51 additions and 45 deletions
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90
drivers/net/skge.c
View File

@ -57,7 +57,7 @@
#define TX_WATCHDOG (5 * HZ)
#define NAPI_WEIGHT 64
#define BLINK_MS 250
#define LINK_HZ (HZ/2)
#define LINK_HZ HZ
MODULE_DESCRIPTION("SysKonnect Gigabit Ethernet driver");
MODULE_AUTHOR("Stephen Hemminger <shemminger@linux-foundation.org>");
@ -995,19 +995,15 @@ static void xm_link_down(struct skge_hw *hw, int port)
{
struct net_device *dev = hw->dev[port];
struct skge_port *skge = netdev_priv(dev);
u16 cmd, msk;
u16 cmd = xm_read16(hw, port, XM_MMU_CMD);
if (hw->phy_type == SK_PHY_XMAC) {
msk = xm_read16(hw, port, XM_IMSK);
msk |= XM_IS_INP_ASS | XM_IS_LIPA_RC | XM_IS_RX_PAGE | XM_IS_AND;
xm_write16(hw, port, XM_IMSK, msk);
}
xm_write16(hw, port, XM_IMSK, XM_IMSK_DISABLE);
cmd = xm_read16(hw, port, XM_MMU_CMD);
cmd &= ~(XM_MMU_ENA_RX | XM_MMU_ENA_TX);
xm_write16(hw, port, XM_MMU_CMD, cmd);
/* dummy read to ensure writing */
(void) xm_read16(hw, port, XM_MMU_CMD);
xm_read16(hw, port, XM_MMU_CMD);
if (netif_carrier_ok(dev))
skge_link_down(skge);
@ -1103,7 +1099,7 @@ static void genesis_reset(struct skge_hw *hw, int port)
/* reset the statistics module */
xm_write32(hw, port, XM_GP_PORT, XM_GP_RES_STAT);
xm_write16(hw, port, XM_IMSK, 0xffff); /* disable XMAC IRQs */
xm_write16(hw, port, XM_IMSK, XM_IMSK_DISABLE);
xm_write32(hw, port, XM_MODE, 0); /* clear Mode Reg */
xm_write16(hw, port, XM_TX_CMD, 0); /* reset TX CMD Reg */
xm_write16(hw, port, XM_RX_CMD, 0); /* reset RX CMD Reg */
@ -1141,7 +1137,7 @@ static void bcom_check_link(struct skge_hw *hw, int port)
u16 status;
/* read twice because of latch */
(void) xm_phy_read(hw, port, PHY_BCOM_STAT);
xm_phy_read(hw, port, PHY_BCOM_STAT);
status = xm_phy_read(hw, port, PHY_BCOM_STAT);
if ((status & PHY_ST_LSYNC) == 0) {
@ -1342,7 +1338,7 @@ static void xm_phy_init(struct skge_port *skge)
mod_timer(&skge->link_timer, jiffies + LINK_HZ);
}
static void xm_check_link(struct net_device *dev)
static int xm_check_link(struct net_device *dev)
{
struct skge_port *skge = netdev_priv(dev);
struct skge_hw *hw = skge->hw;
@ -1350,25 +1346,25 @@ static void xm_check_link(struct net_device *dev)
u16 status;
/* read twice because of latch */
(void) xm_phy_read(hw, port, PHY_XMAC_STAT);
xm_phy_read(hw, port, PHY_XMAC_STAT);
status = xm_phy_read(hw, port, PHY_XMAC_STAT);
if ((status & PHY_ST_LSYNC) == 0) {
xm_link_down(hw, port);
return;
return 0;
}
if (skge->autoneg == AUTONEG_ENABLE) {
u16 lpa, res;
if (!(status & PHY_ST_AN_OVER))
return;
return 0;
lpa = xm_phy_read(hw, port, PHY_XMAC_AUNE_LP);
if (lpa & PHY_B_AN_RF) {
printk(KERN_NOTICE PFX "%s: remote fault\n",
dev->name);
return;
return 0;
}
res = xm_phy_read(hw, port, PHY_XMAC_RES_ABI);
@ -1384,7 +1380,7 @@ static void xm_check_link(struct net_device *dev)
default:
printk(KERN_NOTICE PFX "%s: duplex mismatch\n",
dev->name);
return;
return 0;
}
/* We are using IEEE 802.3z/D5.0 Table 37-4 */
@ -1408,11 +1404,14 @@ static void xm_check_link(struct net_device *dev)
if (!netif_carrier_ok(dev))
genesis_link_up(skge);
return 1;
}
/* Poll to check for link coming up.
*
* Since internal PHY is wired to a level triggered pin, can't
* get an interrupt when carrier is detected.
* get an interrupt when carrier is detected, need to poll for
* link coming up.
*/
static void xm_link_timer(unsigned long arg)
{
@ -1420,29 +1419,35 @@ static void xm_link_timer(unsigned long arg)
struct net_device *dev = skge->netdev;
struct skge_hw *hw = skge->hw;
int port = skge->port;
int i;
unsigned long flags;
if (!netif_running(dev))
return;
if (netif_carrier_ok(dev)) {
xm_read16(hw, port, XM_ISRC);
if (!(xm_read16(hw, port, XM_ISRC) & XM_IS_INP_ASS))
goto nochange;
} else {
if (xm_read32(hw, port, XM_GP_PORT) & XM_GP_INP_ASS)
goto nochange;
xm_read16(hw, port, XM_ISRC);
if (xm_read16(hw, port, XM_ISRC) & XM_IS_INP_ASS)
goto nochange;
spin_lock_irqsave(&hw->phy_lock, flags);
/*
* Verify that the link by checking GPIO register three times.
* This pin has the signal from the link_sync pin connected to it.
*/
for (i = 0; i < 3; i++) {
if (xm_read16(hw, port, XM_GP_PORT) & XM_GP_INP_ASS)
goto link_down;
}
spin_lock(&hw->phy_lock);
xm_check_link(dev);
spin_unlock(&hw->phy_lock);
nochange:
if (netif_running(dev))
mod_timer(&skge->link_timer, jiffies + LINK_HZ);
/* Re-enable interrupt to detect link down */
if (xm_check_link(dev)) {
u16 msk = xm_read16(hw, port, XM_IMSK);
msk &= ~XM_IS_INP_ASS;
xm_write16(hw, port, XM_IMSK, msk);
xm_read16(hw, port, XM_ISRC);
} else {
link_down:
mod_timer(&skge->link_timer,
round_jiffies(jiffies + LINK_HZ));
}
spin_unlock_irqrestore(&hw->phy_lock, flags);
}
static void genesis_mac_init(struct skge_hw *hw, int port)
@ -1686,14 +1691,16 @@ static void genesis_mac_intr(struct skge_hw *hw, int port)
printk(KERN_DEBUG PFX "%s: mac interrupt status 0x%x\n",
skge->netdev->name, status);
if (hw->phy_type == SK_PHY_XMAC &&
(status & (XM_IS_INP_ASS | XM_IS_LIPA_RC)))
xm_link_down(hw, port);
if (hw->phy_type == SK_PHY_XMAC && (status & XM_IS_INP_ASS)) {
xm_link_down(hw, port);
mod_timer(&skge->link_timer, jiffies + 1);
}
if (status & XM_IS_TXF_UR) {
xm_write32(hw, port, XM_MODE, XM_MD_FTF);
++skge->net_stats.tx_fifo_errors;
}
if (status & XM_IS_RXF_OV) {
xm_write32(hw, port, XM_MODE, XM_MD_FRF);
++skge->net_stats.rx_fifo_errors;
@ -1753,11 +1760,12 @@ static void genesis_link_up(struct skge_port *skge)
}
xm_write32(hw, port, XM_MODE, mode);
msk = XM_DEF_MSK;
if (hw->phy_type != SK_PHY_XMAC)
msk |= XM_IS_INP_ASS; /* disable GP0 interrupt bit */
/* Turn on detection of Tx underrun, Rx overrun */
msk = xm_read16(hw, port, XM_IMSK);
msk &= ~(XM_IS_RXF_OV | XM_IS_TXF_UR);
xm_write16(hw, port, XM_IMSK, msk);
xm_read16(hw, port, XM_ISRC);
/* get MMU Command Reg. */

6
drivers/net/skge.h
View File

@ -2191,12 +2191,10 @@ enum {
XM_IS_TXF_UR = 1<<2, /* Bit 2: Transmit FIFO Underrun */
XM_IS_TX_COMP = 1<<1, /* Bit 1: Frame Tx Complete */
XM_IS_RX_COMP = 1<<0, /* Bit 0: Frame Rx Complete */
XM_IMSK_DISABLE = 0xffff,
};
#define XM_DEF_MSK (~(XM_IS_INP_ASS | XM_IS_LIPA_RC | \
XM_IS_RXF_OV | XM_IS_TXF_UR))
/* XM_HW_CFG 16 bit r/w Hardware Config Register */
enum {
XM_HW_GEN_EOP = 1<<3, /* Bit 3: generate End of Packet pulse */