171 lines · c
1/*2 drivers/net/ethernet/dec/tulip/pnic.c3 4 Copyright 2000,2001 The Linux Kernel Team5 Written/copyright 1994-2001 by Donald Becker.6 7 This software may be used and distributed according to the terms8 of the GNU General Public License, incorporated herein by reference.9 10 Please submit bugs to http://bugzilla.kernel.org/ .11*/12 13#include <linux/interrupt.h>14#include <linux/kernel.h>15#include <linux/jiffies.h>16#include "tulip.h"17 18 19void pnic_do_nway(struct net_device *dev)20{21 struct tulip_private *tp = netdev_priv(dev);22 void __iomem *ioaddr = tp->base_addr;23 u32 phy_reg = ioread32(ioaddr + 0xB8);24 u32 new_csr6;25 26 if (phy_reg & 0x78000000) { /* Ignore baseT4 */27 if (phy_reg & 0x20000000) dev->if_port = 5;28 else if (phy_reg & 0x40000000) dev->if_port = 3;29 else if (phy_reg & 0x10000000) dev->if_port = 4;30 else if (phy_reg & 0x08000000) dev->if_port = 0;31 tp->nwayset = 1;32 new_csr6 = (dev->if_port & 1) ? 0x01860000 : 0x00420000;33 iowrite32(0x32 | (dev->if_port & 1), ioaddr + CSR12);34 if (dev->if_port & 1)35 iowrite32(0x1F868, ioaddr + 0xB8);36 if (phy_reg & 0x30000000) {37 tp->full_duplex = 1;38 new_csr6 |= 0x00000200;39 }40 if (tulip_debug > 1)41 netdev_dbg(dev, "PNIC autonegotiated status %08x, %s\n",42 phy_reg, medianame[dev->if_port]);43 if (tp->csr6 != new_csr6) {44 tp->csr6 = new_csr6;45 /* Restart Tx */46 tulip_restart_rxtx(tp);47 netif_trans_update(dev);48 }49 }50}51 52void pnic_lnk_change(struct net_device *dev, int csr5)53{54 struct tulip_private *tp = netdev_priv(dev);55 void __iomem *ioaddr = tp->base_addr;56 int phy_reg = ioread32(ioaddr + 0xB8);57 58 if (tulip_debug > 1)59 netdev_dbg(dev, "PNIC link changed state %08x, CSR5 %08x\n",60 phy_reg, csr5);61 if (ioread32(ioaddr + CSR5) & TPLnkFail) {62 iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkFail) | TPLnkPass, ioaddr + CSR7);63 /* If we use an external MII, then we mustn't use the64 * internal negotiation.65 */66 if (tulip_media_cap[dev->if_port] & MediaIsMII)67 return;68 if (! tp->nwayset || time_after(jiffies, dev_trans_start(dev) + 1*HZ)) {69 tp->csr6 = 0x00420000 | (tp->csr6 & 0x0000fdff);70 iowrite32(tp->csr6, ioaddr + CSR6);71 iowrite32(0x30, ioaddr + CSR12);72 iowrite32(0x0201F078, ioaddr + 0xB8); /* Turn on autonegotiation. */73 netif_trans_update(dev);74 }75 } else if (ioread32(ioaddr + CSR5) & TPLnkPass) {76 if (tulip_media_cap[dev->if_port] & MediaIsMII) {77 spin_lock(&tp->lock);78 tulip_check_duplex(dev);79 spin_unlock(&tp->lock);80 } else {81 pnic_do_nway(dev);82 }83 iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkPass) | TPLnkFail, ioaddr + CSR7);84 }85}86 87void pnic_timer(struct timer_list *t)88{89 struct tulip_private *tp = from_timer(tp, t, timer);90 struct net_device *dev = tp->dev;91 void __iomem *ioaddr = tp->base_addr;92 int next_tick = 60*HZ;93 94 if(!ioread32(ioaddr + CSR7)) {95 /* the timer was called due to a work overflow96 * in the interrupt handler. Skip the connection97 * checks, the nic is definitively speaking with98 * his link partner.99 */100 goto too_good_connection;101 }102 103 if (tulip_media_cap[dev->if_port] & MediaIsMII) {104 spin_lock_irq(&tp->lock);105 if (tulip_check_duplex(dev) > 0)106 next_tick = 3*HZ;107 spin_unlock_irq(&tp->lock);108 } else {109 int csr12 = ioread32(ioaddr + CSR12);110 int new_csr6 = tp->csr6 & ~0x40C40200;111 int phy_reg = ioread32(ioaddr + 0xB8);112 int csr5 = ioread32(ioaddr + CSR5);113 114 if (tulip_debug > 1)115 netdev_dbg(dev, "PNIC timer PHY status %08x, %s CSR5 %08x\n",116 phy_reg, medianame[dev->if_port], csr5);117 if (phy_reg & 0x04000000) { /* Remote link fault */118 iowrite32(0x0201F078, ioaddr + 0xB8);119 next_tick = 1*HZ;120 tp->nwayset = 0;121 } else if (phy_reg & 0x78000000) { /* Ignore baseT4 */122 pnic_do_nway(dev);123 next_tick = 60*HZ;124 } else if (csr5 & TPLnkFail) { /* 100baseTx link beat */125 if (tulip_debug > 1)126 netdev_dbg(dev, "%s link beat failed, CSR12 %04x, CSR5 %08x, PHY %03x\n",127 medianame[dev->if_port],128 csr12,129 ioread32(ioaddr + CSR5),130 ioread32(ioaddr + 0xB8));131 next_tick = 3*HZ;132 if (tp->medialock) {133 } else if (tp->nwayset && (dev->if_port & 1)) {134 next_tick = 1*HZ;135 } else if (dev->if_port == 0) {136 dev->if_port = 3;137 iowrite32(0x33, ioaddr + CSR12);138 new_csr6 = 0x01860000;139 iowrite32(0x1F868, ioaddr + 0xB8);140 } else {141 dev->if_port = 0;142 iowrite32(0x32, ioaddr + CSR12);143 new_csr6 = 0x00420000;144 iowrite32(0x1F078, ioaddr + 0xB8);145 }146 if (tp->csr6 != new_csr6) {147 tp->csr6 = new_csr6;148 /* Restart Tx */149 tulip_restart_rxtx(tp);150 netif_trans_update(dev);151 if (tulip_debug > 1)152 dev_info(&dev->dev,153 "Changing PNIC configuration to %s %s-duplex, CSR6 %08x\n",154 medianame[dev->if_port],155 tp->full_duplex ? "full" : "half",156 new_csr6);157 }158 }159 }160too_good_connection:161 mod_timer(&tp->timer, RUN_AT(next_tick));162 if(!ioread32(ioaddr + CSR7)) {163 if (tulip_debug > 1)164 dev_info(&dev->dev, "sw timer wakeup\n");165 disable_irq(dev->irq);166 tulip_refill_rx(dev);167 enable_irq(dev->irq);168 iowrite32(tulip_tbl[tp->chip_id].valid_intrs, ioaddr + CSR7);169 }170}171