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/*
drivers/net/tulip/pnic.c
Maintained by Jeff Garzik <jgarzik@mandrakesoft.com>
Copyright 2000 The Linux Kernel Team
Written/copyright 1994-1999 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 refer to Documentation/networking/tulip.txt for more
information on this driver.
*/
#include <linux/kernel.h>
#include "tulip.h"
void pnic_do_nway(struct net_device *dev)
{
struct tulip_private *tp = (struct tulip_private *)dev->priv;
long ioaddr = dev->base_addr;
u32 phy_reg = inl(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;
outl(0x32 | (dev->if_port & 1), ioaddr + CSR12);
if (dev->if_port & 1)
outl(0x1F868, ioaddr + 0xB8);
if (phy_reg & 0x30000000) {
tp->full_duplex = 1;
new_csr6 |= 0x00000200;
}
if (tulip_debug > 1)
printk(KERN_DEBUG "%s: PNIC autonegotiated status %8.8x, %s.\n",
dev->name, phy_reg, medianame[dev->if_port]);
if (tp->csr6 != new_csr6) {
tp->csr6 = new_csr6;
/* Restart Tx */
tulip_restart_rxtx(tp, tp->csr6);
dev->trans_start = jiffies;
}
}
}
/* Modified version of tulip_check_duplex:
* Always update the 100mbps bit, even if the
* full duplex bit didn't change.
* Manfred Spraul <manfred@colorfullife.com>
*/
int pnic_check_duplex(struct net_device *dev)
{
struct tulip_private *tp = (struct tulip_private *)dev->priv;
int mii_reg1, mii_reg5, negotiated, duplex;
int new_csr6;
mii_reg1 = tulip_mdio_read(dev, tp->phys[0], 1);
mii_reg5 = tulip_mdio_read(dev, tp->phys[0], 5);
if (tulip_debug > 1)
printk(KERN_INFO "%s: MII status %4.4x, Link partner report "
"%4.4x.\n", dev->name, mii_reg1, mii_reg5);
if (mii_reg1 == 0xffff)
return -2;
if ((mii_reg1 & 0x0004) == 0) {
int new_reg1 = tulip_mdio_read(dev, tp->phys[0], 1);
if ((new_reg1 & 0x0004) == 0) {
if (tulip_debug > 1)
printk(KERN_INFO "%s: No link beat on the MII interface,"
" status %4.4x.\n", dev->name, new_reg1);
return -1;
}
}
negotiated = mii_reg5 & tp->advertising[0];
/* 100baseTx-FD or 10T-FD, but not 100-HD */
duplex = ((negotiated & 0x0300) == 0x0100
|| (negotiated & 0x00C0) == 0x0040) ||
tp->full_duplex_lock;
new_csr6 = tp->csr6;
if (negotiated & 0x0380) /* 100mbps. */
new_csr6 &= ~0x00400000;
else
new_csr6 |= 0x00400000;
if (duplex)
new_csr6 |= 0x0200;
else
new_csr6 &= ~0x0200;
if (new_csr6 != tp->csr6) {
tp->full_duplex = duplex;
tp->csr6 = new_csr6;
if (tulip_debug > 0)
printk(KERN_INFO "%s: Setting %s-duplex based on MII"
"#%d link partner capability of %4.4x.\n",
dev->name, tp->full_duplex ? "full" : "half",
tp->phys[0], mii_reg5);
tulip_restart_rxtx(tp, tp->csr6);
return 1;
}
return 0;
}
void pnic_lnk_change(struct net_device *dev, int csr5)
{
struct tulip_private *tp = (struct tulip_private *)dev->priv;
long ioaddr = dev->base_addr;
int phy_reg = inl(ioaddr + 0xB8);
if (tulip_debug > 1)
printk(KERN_DEBUG "%s: PNIC link changed state %8.8x, CSR5 %8.8x.\n",
dev->name, phy_reg, csr5);
if (inl(ioaddr + CSR5) & TPLnkFail) {
outl((inl(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 || jiffies - dev->trans_start > 1*HZ) {
tp->csr6 = 0x00420000 | (tp->csr6 & 0x0000fdff);
tulip_outl_csr(tp, tp->csr6, CSR6);
outl(0x30, ioaddr + CSR12);
outl(0x0201F078, ioaddr + 0xB8); /* Turn on autonegotiation. */
dev->trans_start = jiffies;
}
} else if (inl(ioaddr + CSR5) & TPLnkPass) {
if (tulip_media_cap[dev->if_port] & MediaIsMII) {
spin_lock(&tp->lock);
pnic_check_duplex(dev);
spin_unlock(&tp->lock);
} else {
pnic_do_nway(dev);
}
outl((inl(ioaddr + CSR7) & ~TPLnkPass) | TPLnkFail, ioaddr + CSR7);
}
}
int tulip_refill_rx(struct net_device *dev);
void pnic_timer(unsigned long data)
{
struct net_device *dev = (struct net_device *)data;
struct tulip_private *tp = (struct tulip_private *)dev->priv;
long ioaddr = dev->base_addr;
int next_tick = 60*HZ;
if(!inl(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 (pnic_check_duplex(dev) > 0)
next_tick = 3*HZ;
spin_unlock_irq(&tp->lock);
} else {
int csr12 = inl(ioaddr + CSR12);
int new_csr6 = tp->csr6 & ~0x40C40200;
int phy_reg = inl(ioaddr + 0xB8);
int csr5 = inl(ioaddr + CSR5);
if (tulip_debug > 1)
printk(KERN_DEBUG "%s: PNIC timer PHY status %8.8x, %s "
"CSR5 %8.8x.\n",
dev->name, phy_reg, medianame[dev->if_port], csr5);
if (phy_reg & 0x04000000) { /* Remote link fault */
outl(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)
printk(KERN_DEBUG "%s: %s link beat failed, CSR12 %4.4x, "
"CSR5 %8.8x, PHY %3.3x.\n",
dev->name, medianame[dev->if_port], csr12,
inl(ioaddr + CSR5), inl(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;
outl(0x33, ioaddr + CSR12);
new_csr6 = 0x01860000;
outl(0x1F868, ioaddr + 0xB8);
} else {
dev->if_port = 0;
outl(0x32, ioaddr + CSR12);
new_csr6 = 0x00420000;
outl(0x1F078, ioaddr + 0xB8);
}
if (tp->csr6 != new_csr6) {
tp->csr6 = new_csr6;
/* Restart Tx */
tulip_restart_rxtx(tp, tp->csr6);
dev->trans_start = jiffies;
if (tulip_debug > 1)
printk(KERN_INFO "%s: Changing PNIC configuration to %s "
"%s-duplex, CSR6 %8.8x.\n",
dev->name, medianame[dev->if_port],
tp->full_duplex ? "full" : "half", new_csr6);
}
}
}
too_good_connection:
mod_timer(&tp->timer, RUN_AT(next_tick));
if(!inl(ioaddr + CSR7)) {
if (tulip_debug > 1)
printk(KERN_INFO "%s: sw timer wakeup.\n", dev->name);
disable_irq(dev->irq);
tulip_refill_rx(dev);
enable_irq(dev->irq);
outl(tulip_tbl[tp->chip_id].valid_intrs, ioaddr + CSR7);
}
}
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