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/kernel.h>
  17 #include <linux/jiffies.h>
  18 #include "tulip.h"
  19
  20
  21 void pnic_do_nway(struct net_device *dev)
  22 {
  23         struct tulip_private *tp = netdev_priv(dev);
  24         void __iomem *ioaddr = tp->base_addr;
  25         u32 phy_reg = ioread32(ioaddr + 0xB8);
  26         u32 new_csr6 = tp->csr6 & ~0x40C40200;
  27
  28         if (phy_reg & 0x78000000) { /* Ignore baseT4 */
  29                 if (phy_reg & 0x20000000)               dev->if_port = 5;
  30                 else if (phy_reg & 0x40000000)  dev->if_port = 3;
  31                 else if (phy_reg & 0x10000000)  dev->if_port = 4;
  32                 else if (phy_reg & 0x08000000)  dev->if_port = 0;
  33                 tp->nwayset = 1;
  34                 new_csr6 = (dev->if_port & 1) ? 0x01860000 : 0x00420000;
  35                 iowrite32(0x32 | (dev->if_port & 1), ioaddr + CSR12);
  36                 if (dev->if_port & 1)
  37                         iowrite32(0x1F868, ioaddr + 0xB8);
  38                 if (phy_reg & 0x30000000) {
  39                         tp->full_duplex = 1;
  40                         new_csr6 |= 0x00000200;
  41                 }
  42                 if (tulip_debug > 1)
  43                         printk(KERN_DEBUG "%s: PNIC autonegotiated status %8.8x, %s.\n",
  44                                    dev->name, phy_reg, medianame[dev->if_port]);
  45                 if (tp->csr6 != new_csr6) {
  46                         tp->csr6 = new_csr6;
  47                         /* Restart Tx */
  48                         tulip_restart_rxtx(tp);
  49                         dev->trans_start = jiffies;
  50                 }
  51         }
  52 }
  53
  54 void pnic_lnk_change(struct net_device *dev, int csr5)
  55 {
  56         struct tulip_private *tp = netdev_priv(dev);
  57         void __iomem *ioaddr = tp->base_addr;
  58         int phy_reg = ioread32(ioaddr + 0xB8);
  59
  60         if (tulip_debug > 1)
  61                 printk(KERN_DEBUG "%s: PNIC link changed state %8.8x, CSR5 %8.8x.\n",
  62                            dev->name, phy_reg, csr5);
  63         if (ioread32(ioaddr + CSR5) & TPLnkFail) {
  64                 iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkFail) | TPLnkPass, ioaddr + CSR7);
  65                 /* If we use an external MII, then we mustn't use the
  66                  * internal negotiation.
  67                  */
  68                 if (tulip_media_cap[dev->if_port] & MediaIsMII)
  69                         return;
  70                 if (! tp->nwayset  ||  time_after(jiffies, dev->trans_start + 1*HZ)) {
  71                         tp->csr6 = 0x00420000 | (tp->csr6 & 0x0000fdff);
  72                         iowrite32(tp->csr6, ioaddr + CSR6);
  73                         iowrite32(0x30, ioaddr + CSR12);
  74                         iowrite32(0x0201F078, ioaddr + 0xB8); /* Turn on autonegotiation. */
  75                         dev->trans_start = jiffies;
  76                 }
  77         } else if (ioread32(ioaddr + CSR5) & TPLnkPass) {
  78                 if (tulip_media_cap[dev->if_port] & MediaIsMII) {
  79                         spin_lock(&tp->lock);
  80                         tulip_check_duplex(dev);
  81                         spin_unlock(&tp->lock);
  82                 } else {
  83                         pnic_do_nway(dev);
  84                 }
  85                 iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkPass) | TPLnkFail, ioaddr + CSR7);
  86         }
  87 }
  88
  89 void pnic_timer(unsigned long data)
  90 {
  91         struct net_device *dev = (struct net_device *)data;
  92         struct tulip_private *tp = netdev_priv(dev);
  93         void __iomem *ioaddr = tp->base_addr;
  94         int next_tick = 60*HZ;
  95
  96         if(!ioread32(ioaddr + CSR7)) {
  97                 /* the timer was called due to a work overflow
  98                  * in the interrupt handler. Skip the connection
  99                  * checks, the nic is definitively speaking with
 100                  * his link partner.
 101                  */
 102                 goto too_good_connection;
 103         }
 104
 105         if (tulip_media_cap[dev->if_port] & MediaIsMII) {
 106                 spin_lock_irq(&tp->lock);
 107                 if (tulip_check_duplex(dev) > 0)
 108                         next_tick = 3*HZ;
 109                 spin_unlock_irq(&tp->lock);
 110         } else {
 111                 int csr12 = ioread32(ioaddr + CSR12);
 112                 int new_csr6 = tp->csr6 & ~0x40C40200;
 113                 int phy_reg = ioread32(ioaddr + 0xB8);
 114                 int csr5 = ioread32(ioaddr + CSR5);
 115
 116                 if (tulip_debug > 1)
 117                         printk(KERN_DEBUG "%s: PNIC timer PHY status %8.8x, %s "
 118                                    "CSR5 %8.8x.\n",
 119                                    dev->name, 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                                 printk(KERN_DEBUG "%s: %s link beat failed, CSR12 %4.4x, "
 130                                            "CSR5 %8.8x, PHY %3.3x.\n",
 131                                            dev->name, medianame[dev->if_port], csr12,
 132                                            ioread32(ioaddr + CSR5), ioread32(ioaddr + 0xB8));
 133                         next_tick = 3*HZ;
 134                         if (tp->medialock) {
 135                         } else if (tp->nwayset  &&  (dev->if_port & 1)) {
 136                                 next_tick = 1*HZ;
 137                         } else if (dev->if_port == 0) {
 138                                 dev->if_port = 3;
 139                                 iowrite32(0x33, ioaddr + CSR12);
 140                                 new_csr6 = 0x01860000;
 141                                 iowrite32(0x1F868, ioaddr + 0xB8);
 142                         } else {
 143                                 dev->if_port = 0;
 144                                 iowrite32(0x32, ioaddr + CSR12);
 145                                 new_csr6 = 0x00420000;
 146                                 iowrite32(0x1F078, ioaddr + 0xB8);
 147                         }
 148                         if (tp->csr6 != new_csr6) {
 149                                 tp->csr6 = new_csr6;
 150                                 /* Restart Tx */
 151                                 tulip_restart_rxtx(tp);
 152                                 dev->trans_start = jiffies;
 153                                 if (tulip_debug > 1)
 154                                         printk(KERN_INFO "%s: Changing PNIC configuration to %s "
 155                                                    "%s-duplex, CSR6 %8.8x.\n",
 156                                                    dev->name, medianame[dev->if_port],
 157                                                    tp->full_duplex ? "full" : "half", new_csr6);
 158                         }
 159                 }
 160         }
 161 too_good_connection:
 162         mod_timer(&tp->timer, RUN_AT(next_tick));
 163         if(!ioread32(ioaddr + CSR7)) {
 164                 if (tulip_debug > 1)
 165                         printk(KERN_INFO "%s: sw timer wakeup.\n", dev->name);
 166                 disable_irq(dev->irq);
 167                 tulip_refill_rx(dev);
 168                 enable_irq(dev->irq);
 169                 iowrite32(tulip_tbl[tp->chip_id].valid_intrs, ioaddr + CSR7);
 170         }
 171 }