pnic.c
上传用户:lgb322
上传日期:2013-02-24
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文件大小:5k
- /*
- drivers/net/tulip/pnic.c
- Maintained by Jeff Garzik <jgarzik@mandrakesoft.com>
- 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 refer to Documentation/DocBook/tulip.{pdf,ps,html}
- for more information on this driver, or visit the project
- Web page at http://sourceforge.net/projects/tulip/
- */
- #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);
- dev->trans_start = jiffies;
- }
- }
- }
- 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);
- outl(tp->csr6, ioaddr + 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);
- tulip_check_duplex(dev);
- spin_unlock(&tp->lock);
- } else {
- pnic_do_nway(dev);
- }
- outl((inl(ioaddr + CSR7) & ~TPLnkPass) | TPLnkFail, ioaddr + CSR7);
- }
- }
- 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 (tulip_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);
- 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);
- }
- }