/*
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 +
0xB8);
u32 new_csr6;
if (phy_reg &
0x78000000) {
/* Ignore baseT4 */
if (phy_reg &
0x20000000) dev->if_port =
5;
else if (phy_reg &
0x40000000) dev->if_port =
3;
else if (phy_reg &
0x10000000) dev->if_port =
4;
else if (phy_reg &
0x08000000) dev->if_port =
0;
tp->nwayset =
1;
new_csr6 = (dev->if_port &
1) ?
0x01860000 :
0x00420000;
iowrite32(
0x32 | (dev->if_port &
1), ioaddr + CSR12);
if (dev->if_port &
1)
iowrite32(
0x1F868, ioaddr +
0xB8);
if (phy_reg &
0x30000000) {
tp->full_duplex =
1;
new_csr6 |=
0x00000200;
}
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 +
0xB8);
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 =
0x00420000 | (tp->csr6 &
0x0000fdff);
iowrite32(tp->csr6, ioaddr + CSR6);
iowrite32(
0x30, ioaddr + CSR12);
iowrite32(
0x0201F078, ioaddr +
0xB8);
/* 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 & ~
0x40C40200;
int phy_reg = ioread32(ioaddr +
0xB8);
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 &
0x04000000) {
/* Remote link fault */
iowrite32(
0x0201F078, ioaddr +
0xB8);
next_tick =
1*HZ;
tp->nwayset =
0;
}
else if (phy_reg &
0x78000000) {
/* 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 +
0xB8));
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(
0x33, ioaddr + CSR12);
new_csr6 =
0x01860000;
iowrite32(
0x1F868, ioaddr +
0xB8);
}
else {
dev->if_port =
0;
iowrite32(
0x32, ioaddr + CSR12);
new_csr6 =
0x00420000;
iowrite32(
0x1F078, ioaddr +
0xB8);
}
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);
}
}