drivers/net/tulip/pnic.c

   1 /*
   2         drivers/net/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 refer to Documentation/DocBook/tulip-user.{pdf,ps,html}
  11         for more information on this driver.
  12
  13         Please submit bugs to http://bugzilla.kernel.org/ .
  14 */
  15
  16 #include <linux/interrupt.h>
  17 #include <linux/kernel.h>
  18 #include <linux/jiffies.h>
  19 #include "tulip.h"
  20
  21
  22 void pnic_do_nway(struct net_device *dev)
  23 {
  24         struct tulip_private *tp = netdev_priv(dev);
  25         void __iomem *ioaddr = tp->base_addr;
  26         u32 phy_reg = ioread32(ioaddr + 0xB8);
  27         u32 new_csr6 = tp->csr6 & ~0x40C40200;
  28
  29         if (phy_reg & 0x78000000) { /* Ignore baseT4 */
  30                 if (phy_reg & 0x20000000)               dev->if_port = 5;
  31                 else if (phy_reg & 0x40000000)  dev->if_port = 3;
  32                 else if (phy_reg & 0x10000000)  dev->if_port = 4;
  33                 else if (phy_reg & 0x08000000)  dev->if_port = 0;
  34                 tp->nwayset = 1;
  35                 new_csr6 = (dev->if_port & 1) ? 0x01860000 : 0x00420000;
  36                 iowrite32(0x32 | (dev->if_port & 1), ioaddr + CSR12);
  37                 if (dev->if_port & 1)
  38                         iowrite32(0x1F868, ioaddr + 0xB8);
  39                 if (phy_reg & 0x30000000) {
  40                         tp->full_duplex = 1;
  41                         new_csr6 |= 0x00000200;
  42                 }
  43                 if (tulip_debug > 1)
  44                         netdev_dbg(dev, "PNIC autonegotiated status %08x, %s\n",
  45                                    phy_reg, medianame[dev->if_port]);
  46                 if (tp->csr6 != new_csr6) {
  47                         tp->csr6 = new_csr6;
  48                         /* Restart Tx */
  49                         tulip_restart_rxtx(tp);
  50                         dev->trans_start = jiffies;
  51                 }
  52         }
  53 }
  54
  55 void pnic_lnk_change(struct net_device *dev, int csr5)
  56 {
  57         struct tulip_private *tp = netdev_priv(dev);
  58         void __iomem *ioaddr = tp->base_addr;
  59         int phy_reg = ioread32(ioaddr + 0xB8);
  60
  61         if (tulip_debug > 1)
  62                 netdev_dbg(dev, "PNIC link changed state %08x, CSR5 %08x\n",
  63                            phy_reg, csr5);
  64         if (ioread32(ioaddr + CSR5) & TPLnkFail) {
  65                 iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkFail) | TPLnkPass, ioaddr + CSR7);
  66                 /* If we use an external MII, then we mustn't use the
  67                  * internal negotiation.
  68                  */
  69                 if (tulip_media_cap[dev->if_port] & MediaIsMII)
  70                         return;
  71                 if (! tp->nwayset || time_after(jiffies, dev_trans_start(dev) + 1*HZ)) {
  72                         tp->csr6 = 0x00420000 | (tp->csr6 & 0x0000fdff);
  73                         iowrite32(tp->csr6, ioaddr + CSR6);
  74                         iowrite32(0x30, ioaddr + CSR12);
  75                         iowrite32(0x0201F078, ioaddr + 0xB8); /* Turn on autonegotiation. */
  76                         dev->trans_start = jiffies;
  77                 }
  78         } else if (ioread32(ioaddr + CSR5) & TPLnkPass) {
  79                 if (tulip_media_cap[dev->if_port] & MediaIsMII) {
  80                         spin_lock(&tp->lock);
  81                         tulip_check_duplex(dev);
  82                         spin_unlock(&tp->lock);
  83                 } else {
  84                         pnic_do_nway(dev);
  85                 }
  86                 iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkPass) | TPLnkFail, ioaddr + CSR7);
  87         }
  88 }
  89
  90 void pnic_timer(unsigned long data)
  91 {
  92         struct net_device *dev = (struct net_device *)data;
  93         struct tulip_private *tp = netdev_priv(dev);
  94         void __iomem *ioaddr = tp->base_addr;
  95         int next_tick = 60*HZ;
  96
  97         if(!ioread32(ioaddr + CSR7)) {
  98                 /* the timer was called due to a work overflow
  99                  * in the interrupt handler. Skip the connection
 100                  * checks, the nic is definitively speaking with
 101                  * his link partner.
 102                  */
 103                 goto too_good_connection;
 104         }
 105
 106         if (tulip_media_cap[dev->if_port] & MediaIsMII) {
 107                 spin_lock_irq(&tp->lock);
 108                 if (tulip_check_duplex(dev) > 0)
 109                         next_tick = 3*HZ;
 110                 spin_unlock_irq(&tp->lock);
 111         } else {
 112                 int csr12 = ioread32(ioaddr + CSR12);
 113                 int new_csr6 = tp->csr6 & ~0x40C40200;
 114                 int phy_reg = ioread32(ioaddr + 0xB8);
 115                 int csr5 = ioread32(ioaddr + CSR5);
 116
 117                 if (tulip_debug > 1)
 118                         netdev_dbg(dev, "PNIC timer PHY status %08x, %s CSR5 %08x\n",
 119                                    phy_reg, medianame[dev->if_port], csr5);
 120                 if (phy_reg & 0x04000000) {     /* Remote link fault */
 121                         iowrite32(0x0201F078, ioaddr + 0xB8);
 122                         next_tick = 1*HZ;
 123                         tp->nwayset = 0;
 124                 } else if (phy_reg & 0x78000000) { /* Ignore baseT4 */
 125                         pnic_do_nway(dev);
 126                         next_tick = 60*HZ;
 127                 } else if (csr5 & TPLnkFail) { /* 100baseTx link beat */
 128                         if (tulip_debug > 1)
 129                                 netdev_dbg(dev, "%s link beat failed, CSR12 %04x, CSR5 %08x, PHY %03x\n",
 130                                            medianame[dev->if_port],
 131                                            csr12,
 132                                            ioread32(ioaddr + CSR5),
 133                                            ioread32(ioaddr + 0xB8));
 134                         next_tick = 3*HZ;
 135                         if (tp->medialock) {
 136                         } else if (tp->nwayset  &&  (dev->if_port & 1)) {
 137                                 next_tick = 1*HZ;
 138                         } else if (dev->if_port == 0) {
 139                                 dev->if_port = 3;
 140                                 iowrite32(0x33, ioaddr + CSR12);
 141                                 new_csr6 = 0x01860000;
 142                                 iowrite32(0x1F868, ioaddr + 0xB8);
 143                         } else {
 144                                 dev->if_port = 0;
 145                                 iowrite32(0x32, ioaddr + CSR12);
 146                                 new_csr6 = 0x00420000;
 147                                 iowrite32(0x1F078, ioaddr + 0xB8);
 148                         }
 149                         if (tp->csr6 != new_csr6) {
 150                                 tp->csr6 = new_csr6;
 151                                 /* Restart Tx */
 152                                 tulip_restart_rxtx(tp);
 153                                 dev->trans_start = jiffies;
 154                                 if (tulip_debug > 1)
 155                                         dev_info(&dev->dev,
 156                                                  "Changing PNIC configuration to %s %s-duplex, CSR6 %08x\n",
 157                                                  medianame[dev->if_port],
 158                                                  tp->full_duplex ? "full" : "half",
 159                                                  new_csr6);
 160                         }
 161                 }
 162         }
 163 too_good_connection:
 164         mod_timer(&tp->timer, RUN_AT(next_tick));
 165         if(!ioread32(ioaddr + CSR7)) {
 166                 if (tulip_debug > 1)
 167                         dev_info(&dev->dev, "sw timer wakeup\n");
 168                 disable_irq(dev->irq);
 169                 tulip_refill_rx(dev);
 170                 enable_irq(dev->irq);
 171                 iowrite32(tulip_tbl[tp->chip_id].valid_intrs, ioaddr + CSR7);
 172         }
 173 }