drivers/net/tulip/pnic.c

   1 /*
   2         drivers/net/tulip/pnic.c
   3
   4         Maintained by Valerie Henson <val_henson@linux.intel.com>
   5         Copyright 2000,2001  The Linux Kernel Team
   6         Written/copyright 1994-2001 by Donald Becker.
   7
   8         This software may be used and distributed according to the terms
   9         of the GNU General Public License, incorporated herein by reference.
  10
  11         Please refer to Documentation/DocBook/tulip-user.{pdf,ps,html}
  12         for more information on this driver, or visit the project
  13         Web page at http://sourceforge.net/projects/tulip/
  14
  15 */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/pci.h>
  19 #include <linux/jiffies.h>
  20 #include "tulip.h"
  21
  22
  23 void pnic_do_nway(struct net_device *dev)
  24 {
  25         struct tulip_private *tp = netdev_priv(dev);
  26         void __iomem *ioaddr = tp->base_addr;
  27         u32 phy_reg = ioread32(ioaddr + 0xB8);
  28         u32 new_csr6 = tp->csr6 & ~0x40C40200;
  29
  30         if (phy_reg & 0x78000000) { /* Ignore baseT4 */
  31                 if (phy_reg & 0x20000000)               dev->if_port = 5;
  32                 else if (phy_reg & 0x40000000)  dev->if_port = 3;
  33                 else if (phy_reg & 0x10000000)  dev->if_port = 4;
  34                 else if (phy_reg & 0x08000000)  dev->if_port = 0;
  35                 tp->nwayset = 1;
  36                 new_csr6 = (dev->if_port & 1) ? 0x01860000 : 0x00420000;
  37                 iowrite32(0x32 | (dev->if_port & 1), ioaddr + CSR12);
  38                 if (dev->if_port & 1)
  39                         iowrite32(0x1F868, ioaddr + 0xB8);
  40                 if (phy_reg & 0x30000000) {
  41                         tp->full_duplex = 1;
  42                         new_csr6 |= 0x00000200;
  43                 }
  44                 if (tulip_debug > 1)
  45                         printk(KERN_DEBUG "%s: PNIC autonegotiated status %8.8x, %s.\n",
  46                                    dev->name, phy_reg, medianame[dev->if_port]);
  47                 if (tp->csr6 != new_csr6) {
  48                         tp->csr6 = new_csr6;
  49                         /* Restart Tx */
  50                         tulip_restart_rxtx(tp);
  51                         dev->trans_start = jiffies;
  52                 }
  53         }
  54 }
  55
  56 void pnic_lnk_change(struct net_device *dev, int csr5)
  57 {
  58         struct tulip_private *tp = netdev_priv(dev);
  59         void __iomem *ioaddr = tp->base_addr;
  60         int phy_reg = ioread32(ioaddr + 0xB8);
  61
  62         if (tulip_debug > 1)
  63                 printk(KERN_DEBUG "%s: PNIC link changed state %8.8x, CSR5 %8.8x.\n",
  64                            dev->name, phy_reg, csr5);
  65         if (ioread32(ioaddr + CSR5) & TPLnkFail) {
  66                 iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkFail) | TPLnkPass, ioaddr + CSR7);
  67                 /* If we use an external MII, then we mustn't use the
  68                  * internal negotiation.
  69                  */
  70                 if (tulip_media_cap[dev->if_port] & MediaIsMII)
  71                         return;
  72                 if (! tp->nwayset  ||  time_after(jiffies, dev->trans_start + 1*HZ)) {
  73                         tp->csr6 = 0x00420000 | (tp->csr6 & 0x0000fdff);
  74                         iowrite32(tp->csr6, ioaddr + CSR6);
  75                         iowrite32(0x30, ioaddr + CSR12);
  76                         iowrite32(0x0201F078, ioaddr + 0xB8); /* Turn on autonegotiation. */
  77                         dev->trans_start = jiffies;
  78                 }
  79         } else if (ioread32(ioaddr + CSR5) & TPLnkPass) {
  80                 if (tulip_media_cap[dev->if_port] & MediaIsMII) {
  81                         spin_lock(&tp->lock);
  82                         tulip_check_duplex(dev);
  83                         spin_unlock(&tp->lock);
  84                 } else {
  85                         pnic_do_nway(dev);
  86                 }
  87                 iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkPass) | TPLnkFail, ioaddr + CSR7);
  88         }
  89 }
  90
  91 void pnic_timer(unsigned long data)
  92 {
  93         struct net_device *dev = (struct net_device *)data;
  94         struct tulip_private *tp = netdev_priv(dev);
  95         void __iomem *ioaddr = tp->base_addr;
  96         int next_tick = 60*HZ;
  97
  98         if(!ioread32(ioaddr + CSR7)) {
  99                 /* the timer was called due to a work overflow
 100                  * in the interrupt handler. Skip the connection
 101                  * checks, the nic is definitively speaking with
 102                  * his link partner.
 103                  */
 104                 goto too_good_connection;
 105         }
 106
 107         if (tulip_media_cap[dev->if_port] & MediaIsMII) {
 108                 spin_lock_irq(&tp->lock);
 109                 if (tulip_check_duplex(dev) > 0)
 110                         next_tick = 3*HZ;
 111                 spin_unlock_irq(&tp->lock);
 112         } else {
 113                 int csr12 = ioread32(ioaddr + CSR12);
 114                 int new_csr6 = tp->csr6 & ~0x40C40200;
 115                 int phy_reg = ioread32(ioaddr + 0xB8);
 116                 int csr5 = ioread32(ioaddr + CSR5);
 117
 118                 if (tulip_debug > 1)
 119                         printk(KERN_DEBUG "%s: PNIC timer PHY status %8.8x, %s "
 120                                    "CSR5 %8.8x.\n",
 121                                    dev->name, phy_reg, medianame[dev->if_port], csr5);
 122                 if (phy_reg & 0x04000000) {     /* Remote link fault */
 123                         iowrite32(0x0201F078, ioaddr + 0xB8);
 124                         next_tick = 1*HZ;
 125                         tp->nwayset = 0;
 126                 } else if (phy_reg & 0x78000000) { /* Ignore baseT4 */
 127                         pnic_do_nway(dev);
 128                         next_tick = 60*HZ;
 129                 } else if (csr5 & TPLnkFail) { /* 100baseTx link beat */
 130                         if (tulip_debug > 1)
 131                                 printk(KERN_DEBUG "%s: %s link beat failed, CSR12 %4.4x, "
 132                                            "CSR5 %8.8x, PHY %3.3x.\n",
 133                                            dev->name, medianame[dev->if_port], csr12,
 134                                            ioread32(ioaddr + CSR5), ioread32(ioaddr + 0xB8));
 135                         next_tick = 3*HZ;
 136                         if (tp->medialock) {
 137                         } else if (tp->nwayset  &&  (dev->if_port & 1)) {
 138                                 next_tick = 1*HZ;
 139                         } else if (dev->if_port == 0) {
 140                                 dev->if_port = 3;
 141                                 iowrite32(0x33, ioaddr + CSR12);
 142                                 new_csr6 = 0x01860000;
 143                                 iowrite32(0x1F868, ioaddr + 0xB8);
 144                         } else {
 145                                 dev->if_port = 0;
 146                                 iowrite32(0x32, ioaddr + CSR12);
 147                                 new_csr6 = 0x00420000;
 148                                 iowrite32(0x1F078, ioaddr + 0xB8);
 149                         }
 150                         if (tp->csr6 != new_csr6) {
 151                                 tp->csr6 = new_csr6;
 152                                 /* Restart Tx */
 153                                 tulip_restart_rxtx(tp);
 154                                 dev->trans_start = jiffies;
 155                                 if (tulip_debug > 1)
 156                                         printk(KERN_INFO "%s: Changing PNIC configuration to %s "
 157                                                    "%s-duplex, CSR6 %8.8x.\n",
 158                                                    dev->name, medianame[dev->if_port],
 159                                                    tp->full_duplex ? "full" : "half", 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                         printk(KERN_INFO "%s: sw timer wakeup.\n", dev->name);
 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 }