/*
drivers / net / ethernet / dec / tulip / pnic . c
Copyright 2000 , 2001 The Linux Kernel Team
Written / copyright 1994 - 2001 by Donald Becker .
This software may be used and distributed according to the terms
of the GNU General Public License , incorporated herein by reference .
Please submit bugs to http : //bugzilla.kernel.org/ .
*/
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/jiffies.h>
#include "tulip.h"
void pnic_do_nway(struct net_device *dev)
{
struct tulip_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->base_addr;
u32 phy_reg = ioread32(ioaddr + 0 xB8);
u32 new_csr6;
if (phy_reg & 0 x78000000) { /* Ignore baseT4 */
if (phy_reg & 0 x20000000) dev->if_port = 5 ;
else if (phy_reg & 0 x40000000) dev->if_port = 3 ;
else if (phy_reg & 0 x10000000) dev->if_port = 4 ;
else if (phy_reg & 0 x08000000) dev->if_port = 0 ;
tp->nwayset = 1 ;
new_csr6 = (dev->if_port & 1 ) ? 0 x01860000 : 0 x00420000;
iowrite32(0 x32 | (dev->if_port & 1 ), ioaddr + CSR12);
if (dev->if_port & 1 )
iowrite32(0 x1F868, ioaddr + 0 xB8);
if (phy_reg & 0 x30000000) {
tp->full_duplex = 1 ;
new_csr6 |= 0 x00000200;
}
if (tulip_debug > 1 )
netdev_dbg(dev, "PNIC autonegotiated status %08x, %s\n" ,
phy_reg, medianame[dev->if_port]);
if (tp->csr6 != new_csr6) {
tp->csr6 = new_csr6;
/* Restart Tx */
tulip_restart_rxtx(tp);
netif_trans_update(dev);
}
}
}
void pnic_lnk_change(struct net_device *dev, int csr5)
{
struct tulip_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->base_addr;
int phy_reg = ioread32(ioaddr + 0 xB8);
if (tulip_debug > 1 )
netdev_dbg(dev, "PNIC link changed state %08x, CSR5 %08x\n" ,
phy_reg, csr5);
if (ioread32(ioaddr + CSR5) & TPLnkFail) {
iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkFail) | TPLnkPass, ioaddr + CSR7);
/* If we use an external MII, then we mustn't use the
* internal negotiation .
*/
if (tulip_media_cap[dev->if_port] & MediaIsMII)
return ;
if (! tp->nwayset || time_after(jiffies, dev_trans_start(dev) + 1 *HZ)) {
tp->csr6 = 0 x00420000 | (tp->csr6 & 0 x0000fdff);
iowrite32(tp->csr6, ioaddr + CSR6);
iowrite32(0 x30, ioaddr + CSR12);
iowrite32(0 x0201F078, ioaddr + 0 xB8); /* Turn on autonegotiation. */
netif_trans_update(dev);
}
} else if (ioread32(ioaddr + CSR5) & TPLnkPass) {
if (tulip_media_cap[dev->if_port] & MediaIsMII) {
spin_lock(&tp->lock);
tulip_check_duplex(dev);
spin_unlock(&tp->lock);
} else {
pnic_do_nway(dev);
}
iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkPass) | TPLnkFail, ioaddr + CSR7);
}
}
void pnic_timer(struct timer_list *t)
{
struct tulip_private *tp = timer_container_of(tp, t, timer);
struct net_device *dev = tp->dev;
void __iomem *ioaddr = tp->base_addr;
int next_tick = 60 *HZ;
if (!ioread32(ioaddr + CSR7)) {
/* the timer was called due to a work overflow
* in the interrupt handler . Skip the connection
* checks , the nic is definitively speaking with
* his link partner .
*/
goto too_good_connection;
}
if (tulip_media_cap[dev->if_port] & MediaIsMII) {
spin_lock_irq(&tp->lock);
if (tulip_check_duplex(dev) > 0 )
next_tick = 3 *HZ;
spin_unlock_irq(&tp->lock);
} else {
int csr12 = ioread32(ioaddr + CSR12);
int new_csr6 = tp->csr6 & ~0 x40C40200;
int phy_reg = ioread32(ioaddr + 0 xB8);
int csr5 = ioread32(ioaddr + CSR5);
if (tulip_debug > 1 )
netdev_dbg(dev, "PNIC timer PHY status %08x, %s CSR5 %08x\n" ,
phy_reg, medianame[dev->if_port], csr5);
if (phy_reg & 0 x04000000) { /* Remote link fault */
iowrite32(0 x0201F078, ioaddr + 0 xB8);
next_tick = 1 *HZ;
tp->nwayset = 0 ;
} else if (phy_reg & 0 x78000000) { /* Ignore baseT4 */
pnic_do_nway(dev);
next_tick = 60 *HZ;
} else if (csr5 & TPLnkFail) { /* 100baseTx link beat */
if (tulip_debug > 1 )
netdev_dbg(dev, "%s link beat failed, CSR12 %04x, CSR5 %08x, PHY %03x\n" ,
medianame[dev->if_port],
csr12,
ioread32(ioaddr + CSR5),
ioread32(ioaddr + 0 xB8));
next_tick = 3 *HZ;
if (tp->medialock) {
} else if (tp->nwayset && (dev->if_port & 1 )) {
next_tick = 1 *HZ;
} else if (dev->if_port == 0 ) {
dev->if_port = 3 ;
iowrite32(0 x33, ioaddr + CSR12);
new_csr6 = 0 x01860000;
iowrite32(0 x1F868, ioaddr + 0 xB8);
} else {
dev->if_port = 0 ;
iowrite32(0 x32, ioaddr + CSR12);
new_csr6 = 0 x00420000;
iowrite32(0 x1F078, ioaddr + 0 xB8);
}
if (tp->csr6 != new_csr6) {
tp->csr6 = new_csr6;
/* Restart Tx */
tulip_restart_rxtx(tp);
netif_trans_update(dev);
if (tulip_debug > 1 )
dev_info(&dev->dev,
"Changing PNIC configuration to %s %s-duplex, CSR6 %08x\n" ,
medianame[dev->if_port],
tp->full_duplex ? "full" : "half" ,
new_csr6);
}
}
}
too_good_connection:
mod_timer(&tp->timer, RUN_AT(next_tick));
if (!ioread32(ioaddr + CSR7)) {
if (tulip_debug > 1 )
dev_info(&dev->dev, "sw timer wakeup\n" );
disable_irq(dev->irq);
tulip_refill_rx(dev);
enable_irq(dev->irq);
iowrite32(tulip_tbl[tp->chip_id].valid_intrs, ioaddr + CSR7);
}
}
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