kernel/drivers/net/ethernet/dec/tulip/pnic.c

   1 /*
   2         drivers/net/ethernet/dec/tulip/pnic.c
   3
   4         Copyright 2000,2001  The Linux Kernel Team
   5         Written/copyright 1994-2001 by Donald Becker.
   6
   7         This software may be used and distributed according to the terms
   8         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
  19 void 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 = tp->csr6 & ~0x40C40200;
  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                         dev->trans_start = jiffies;
  48                 }
  49         }
  50 }
  51
  52 void 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 the
  64                  * 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                         dev->trans_start = jiffies;
  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
  87 void pnic_timer(unsigned long data)
  88 {
  89         struct net_device *dev = (struct net_device *)data;
  90         struct tulip_private *tp = netdev_priv(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 overflow
  96                  * in the interrupt handler. Skip the connection
  97                  * checks, the nic is definitively speaking with
  98                  * 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                                 dev->trans_start = jiffies;
 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         }
 160 too_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 }