drivers/net/ethernet/dec/tulip/21142.c

   1 /*
   2         drivers/net/tulip/21142.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         DC21143 manual "21143 PCI/CardBus 10/100Mb/s Ethernet LAN Controller
  14         Hardware Reference Manual" is currently available at :
  15         http://developer.intel.com/design/network/manuals/278074.htm
  16
  17         Please submit bugs to http://bugzilla.kernel.org/ .
  18 */
  19
  20 #include <linux/delay.h>
  21 #include "tulip.h"
  22
  23
  24 static u16 t21142_csr13[] = { 0x0001, 0x0009, 0x0009, 0x0000, 0x0001, };
  25 u16 t21142_csr14[] =        { 0xFFFF, 0x0705, 0x0705, 0x0000, 0x7F3D, };
  26 static u16 t21142_csr15[] = { 0x0008, 0x0006, 0x000E, 0x0008, 0x0008, };
  27
  28
  29 /* Handle the 21143 uniquely: do autoselect with NWay, not the EEPROM list
  30    of available transceivers.  */
  31 void t21142_media_task(struct work_struct *work)
  32 {
  33         struct tulip_private *tp =
  34                 container_of(work, struct tulip_private, media_work);
  35         struct net_device *dev = tp->dev;
  36         void __iomem *ioaddr = tp->base_addr;
  37         int csr12 = ioread32(ioaddr + CSR12);
  38         int next_tick = 60*HZ;
  39         int new_csr6 = 0;
  40         int csr14 = ioread32(ioaddr + CSR14);
  41
  42         /* CSR12[LS10,LS100] are not reliable during autonegotiation */
  43         if ((csr14 & 0x80) && (csr12 & 0x7000) != 0x5000)
  44                 csr12 |= 6;
  45         if (tulip_debug > 2)
  46                 dev_info(&dev->dev, "21143 negotiation status %08x, %s\n",
  47                          csr12, medianame[dev->if_port]);
  48         if (tulip_media_cap[dev->if_port] & MediaIsMII) {
  49                 if (tulip_check_duplex(dev) < 0) {
  50                         netif_carrier_off(dev);
  51                         next_tick = 3*HZ;
  52                 } else {
  53                         netif_carrier_on(dev);
  54                         next_tick = 60*HZ;
  55                 }
  56         } else if (tp->nwayset) {
  57                 /* Don't screw up a negotiated session! */
  58                 if (tulip_debug > 1)
  59                         dev_info(&dev->dev,
  60                                  "Using NWay-set %s media, csr12 %08x\n",
  61                                  medianame[dev->if_port], csr12);
  62         } else if (tp->medialock) {
  63                         ;
  64         } else if (dev->if_port == 3) {
  65                 if (csr12 & 2) {        /* No 100mbps link beat, revert to 10mbps. */
  66                         if (tulip_debug > 1)
  67                                 dev_info(&dev->dev,
  68                                          "No 21143 100baseTx link beat, %08x, trying NWay\n",
  69                                          csr12);
  70                         t21142_start_nway(dev);
  71                         next_tick = 3*HZ;
  72                 }
  73         } else if ((csr12 & 0x7000) != 0x5000) {
  74                 /* Negotiation failed.  Search media types. */
  75                 if (tulip_debug > 1)
  76                         dev_info(&dev->dev,
  77                                  "21143 negotiation failed, status %08x\n",
  78                                  csr12);
  79                 if (!(csr12 & 4)) {             /* 10mbps link beat good. */
  80                         new_csr6 = 0x82420000;
  81                         dev->if_port = 0;
  82                         iowrite32(0, ioaddr + CSR13);
  83                         iowrite32(0x0003FFFF, ioaddr + CSR14);
  84                         iowrite16(t21142_csr15[dev->if_port], ioaddr + CSR15);
  85                         iowrite32(t21142_csr13[dev->if_port], ioaddr + CSR13);
  86                 } else {
  87                         /* Select 100mbps port to check for link beat. */
  88                         new_csr6 = 0x83860000;
  89                         dev->if_port = 3;
  90                         iowrite32(0, ioaddr + CSR13);
  91                         iowrite32(0x0003FFFF, ioaddr + CSR14);
  92                         iowrite16(8, ioaddr + CSR15);
  93                         iowrite32(1, ioaddr + CSR13);
  94                 }
  95                 if (tulip_debug > 1)
  96                         dev_info(&dev->dev, "Testing new 21143 media %s\n",
  97                                  medianame[dev->if_port]);
  98                 if (new_csr6 != (tp->csr6 & ~0x00D5)) {
  99                         tp->csr6 &= 0x00D5;
 100                         tp->csr6 |= new_csr6;
 101                         iowrite32(0x0301, ioaddr + CSR12);
 102                         tulip_restart_rxtx(tp);
 103                 }
 104                 next_tick = 3*HZ;
 105         }
 106
 107         /* mod_timer synchronizes us with potential add_timer calls
 108          * from interrupts.
 109          */
 110         mod_timer(&tp->timer, RUN_AT(next_tick));
 111 }
 112
 113
 114 void t21142_start_nway(struct net_device *dev)
 115 {
 116         struct tulip_private *tp = netdev_priv(dev);
 117         void __iomem *ioaddr = tp->base_addr;
 118         int csr14 = ((tp->sym_advertise & 0x0780) << 9)  |
 119                 ((tp->sym_advertise & 0x0020) << 1) | 0xffbf;
 120
 121         dev->if_port = 0;
 122         tp->nway = tp->mediasense = 1;
 123         tp->nwayset = tp->lpar = 0;
 124         if (tulip_debug > 1)
 125                 netdev_dbg(dev, "Restarting 21143 autonegotiation, csr14=%08x\n",
 126                            csr14);
 127         iowrite32(0x0001, ioaddr + CSR13);
 128         udelay(100);
 129         iowrite32(csr14, ioaddr + CSR14);
 130         tp->csr6 = 0x82420000 | (tp->sym_advertise & 0x0040 ? FullDuplex : 0);
 131         iowrite32(tp->csr6, ioaddr + CSR6);
 132         if (tp->mtable  &&  tp->mtable->csr15dir) {
 133                 iowrite32(tp->mtable->csr15dir, ioaddr + CSR15);
 134                 iowrite32(tp->mtable->csr15val, ioaddr + CSR15);
 135         } else
 136                 iowrite16(0x0008, ioaddr + CSR15);
 137         iowrite32(0x1301, ioaddr + CSR12);              /* Trigger NWAY. */
 138 }
 139
 140
 141
 142 void t21142_lnk_change(struct net_device *dev, int csr5)
 143 {
 144         struct tulip_private *tp = netdev_priv(dev);
 145         void __iomem *ioaddr = tp->base_addr;
 146         int csr12 = ioread32(ioaddr + CSR12);
 147         int csr14 = ioread32(ioaddr + CSR14);
 148
 149         /* CSR12[LS10,LS100] are not reliable during autonegotiation */
 150         if ((csr14 & 0x80) && (csr12 & 0x7000) != 0x5000)
 151                 csr12 |= 6;
 152         if (tulip_debug > 1)
 153                 dev_info(&dev->dev,
 154                          "21143 link status interrupt %08x, CSR5 %x, %08x\n",
 155                          csr12, csr5, csr14);
 156
 157         /* If NWay finished and we have a negotiated partner capability. */
 158         if (tp->nway  &&  !tp->nwayset  &&  (csr12 & 0x7000) == 0x5000) {
 159                 int setup_done = 0;
 160                 int negotiated = tp->sym_advertise & (csr12 >> 16);
 161                 tp->lpar = csr12 >> 16;
 162                 tp->nwayset = 1;
 163                 /* If partner cannot negotiate, it is 10Mbps Half Duplex */
 164                 if (!(csr12 & 0x8000))          dev->if_port = 0;
 165                 else if (negotiated & 0x0100)   dev->if_port = 5;
 166                 else if (negotiated & 0x0080)   dev->if_port = 3;
 167                 else if (negotiated & 0x0040)   dev->if_port = 4;
 168                 else if (negotiated & 0x0020)   dev->if_port = 0;
 169                 else {
 170                         tp->nwayset = 0;
 171                         if ((csr12 & 2) == 0  &&  (tp->sym_advertise & 0x0180))
 172                                 dev->if_port = 3;
 173                 }
 174                 tp->full_duplex = (tulip_media_cap[dev->if_port] & MediaAlwaysFD) ? 1:0;
 175
 176                 if (tulip_debug > 1) {
 177                         if (tp->nwayset)
 178                                 dev_info(&dev->dev,
 179                                          "Switching to %s based on link negotiation %04x & %04x = %04x\n",
 180                                          medianame[dev->if_port],
 181                                          tp->sym_advertise, tp->lpar,
 182                                          negotiated);
 183                         else
 184                                 dev_info(&dev->dev,
 185                                          "Autonegotiation failed, using %s, link beat status %04x\n",
 186                                          medianame[dev->if_port], csr12);
 187                 }
 188
 189                 if (tp->mtable) {
 190                         int i;
 191                         for (i = 0; i < tp->mtable->leafcount; i++)
 192                                 if (tp->mtable->mleaf[i].media == dev->if_port) {
 193                                         int startup = ! ((tp->chip_id == DC21143 && (tp->revision == 48 || tp->revision == 65)));
 194                                         tp->cur_index = i;
 195                                         tulip_select_media(dev, startup);
 196                                         setup_done = 1;
 197                                         break;
 198                                 }
 199                 }
 200                 if ( ! setup_done) {
 201                         tp->csr6 = (dev->if_port & 1 ? 0x838E0000 : 0x82420000) | (tp->csr6 & 0x20ff);
 202                         if (tp->full_duplex)
 203                                 tp->csr6 |= 0x0200;
 204                         iowrite32(1, ioaddr + CSR13);
 205                 }
 206 #if 0                                                   /* Restart shouldn't be needed. */
 207                 iowrite32(tp->csr6 | RxOn, ioaddr + CSR6);
 208                 if (tulip_debug > 2)
 209                         netdev_dbg(dev, " Restarting Tx and Rx, CSR5 is %08x\n",
 210                                    ioread32(ioaddr + CSR5));
 211 #endif
 212                 tulip_start_rxtx(tp);
 213                 if (tulip_debug > 2)
 214                         netdev_dbg(dev, " Setting CSR6 %08x/%x CSR12 %08x\n",
 215                                    tp->csr6, ioread32(ioaddr + CSR6),
 216                                    ioread32(ioaddr + CSR12));
 217         } else if ((tp->nwayset  &&  (csr5 & 0x08000000) &&
 218                     (dev->if_port == 3  ||  dev->if_port == 5) &&
 219                     (csr12 & 2) == 2) ||
 220                    (tp->nway && (csr5 & (TPLnkFail)))) {
 221                 /* Link blew? Maybe restart NWay. */
 222                 del_timer_sync(&tp->timer);
 223                 t21142_start_nway(dev);
 224                 tp->timer.expires = RUN_AT(3*HZ);
 225                 add_timer(&tp->timer);
 226         } else if (dev->if_port == 3  ||  dev->if_port == 5) {
 227                 if (tulip_debug > 1)
 228                         dev_info(&dev->dev, "21143 %s link beat %s\n",
 229                                  medianame[dev->if_port],
 230                                  (csr12 & 2) ? "failed" : "good");
 231                 if ((csr12 & 2)  &&  ! tp->medialock) {
 232                         del_timer_sync(&tp->timer);
 233                         t21142_start_nway(dev);
 234                         tp->timer.expires = RUN_AT(3*HZ);
 235                         add_timer(&tp->timer);
 236                 } else if (dev->if_port == 5)
 237                         iowrite32(csr14 & ~0x080, ioaddr + CSR14);
 238         } else if (dev->if_port == 0  ||  dev->if_port == 4) {
 239                 if ((csr12 & 4) == 0)
 240                         dev_info(&dev->dev, "21143 10baseT link beat good\n");
 241         } else if (!(csr12 & 4)) {              /* 10mbps link beat good. */
 242                 if (tulip_debug)
 243                         dev_info(&dev->dev, "21143 10mbps sensed media\n");
 244                 dev->if_port = 0;
 245         } else if (tp->nwayset) {
 246                 if (tulip_debug)
 247                         dev_info(&dev->dev, "21143 using NWay-set %s, csr6 %08x\n",
 248                                  medianame[dev->if_port], tp->csr6);
 249         } else {                /* 100mbps link beat good. */
 250                 if (tulip_debug)
 251                         dev_info(&dev->dev, "21143 100baseTx sensed media\n");
 252                 dev->if_port = 3;
 253                 tp->csr6 = 0x838E0000 | (tp->csr6 & 0x20ff);
 254                 iowrite32(0x0003FF7F, ioaddr + CSR14);
 255                 iowrite32(0x0301, ioaddr + CSR12);
 256                 tulip_restart_rxtx(tp);
 257         }
 258 }
 259
 260