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/*
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 = tp->csr6 & ~0x40C40200;
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 = from_timer(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);
}
}
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