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