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

DEFINITIONS

1. t21142_media_task
2. t21142_start_nway
3. t21142_lnk_change

   1 /*
   2         drivers/net/ethernet/dec/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         DC21143 manual "21143 PCI/CardBus 10/100Mb/s Ethernet LAN Controller
  11         Hardware Reference Manual" is currently available at :
  12         http://developer.intel.com/design/network/manuals/278074.htm
  13 
  14         Please submit bugs to http://bugzilla.kernel.org/ .
  15 */
  16 
  17 #include <linux/delay.h>
  18 #include "tulip.h"
  19 
  20 
  21 static u16 t21142_csr13[] = { 0x0001, 0x0009, 0x0009, 0x0000, 0x0001, };
  22 u16 t21142_csr14[] =        { 0xFFFF, 0x0705, 0x0705, 0x0000, 0x7F3D, };
  23 static u16 t21142_csr15[] = { 0x0008, 0x0006, 0x000E, 0x0008, 0x0008, };
  24 
  25 
  26 /* Handle the 21143 uniquely: do autoselect with NWay, not the EEPROM list
  27    of available transceivers.  */
  28 void t21142_media_task(struct work_struct *work)
  29 {
  30         struct tulip_private *tp =
  31                 container_of(work, struct tulip_private, media_work);
  32         struct net_device *dev = tp->dev;
  33         void __iomem *ioaddr = tp->base_addr;
  34         int csr12 = ioread32(ioaddr + CSR12);
  35         int next_tick = 60*HZ;
  36         int new_csr6 = 0;
  37         int csr14 = ioread32(ioaddr + CSR14);
  38 
  39         /* CSR12[LS10,LS100] are not reliable during autonegotiation */
  40         if ((csr14 & 0x80) && (csr12 & 0x7000) != 0x5000)
  41                 csr12 |= 6;
  42         if (tulip_debug > 2)
  43                 dev_info(&dev->dev, "21143 negotiation status %08x, %s\n",
  44                          csr12, medianame[dev->if_port]);
  45         if (tulip_media_cap[dev->if_port] & MediaIsMII) {
  46                 if (tulip_check_duplex(dev) < 0) {
  47                         netif_carrier_off(dev);
  48                         next_tick = 3*HZ;
  49                 } else {
  50                         netif_carrier_on(dev);
  51                         next_tick = 60*HZ;
  52                 }
  53         } else if (tp->nwayset) {
  54                 /* Don't screw up a negotiated session! */
  55                 if (tulip_debug > 1)
  56                         dev_info(&dev->dev,
  57                                  "Using NWay-set %s media, csr12 %08x\n",
  58                                  medianame[dev->if_port], csr12);
  59         } else if (tp->medialock) {
  60                         ;
  61         } else if (dev->if_port == 3) {
  62                 if (csr12 & 2) {        /* No 100mbps link beat, revert to 10mbps. */
  63                         if (tulip_debug > 1)
  64                                 dev_info(&dev->dev,
  65                                          "No 21143 100baseTx link beat, %08x, trying NWay\n",
  66                                          csr12);
  67                         t21142_start_nway(dev);
  68                         next_tick = 3*HZ;
  69                 }
  70         } else if ((csr12 & 0x7000) != 0x5000) {
  71                 /* Negotiation failed.  Search media types. */
  72                 if (tulip_debug > 1)
  73                         dev_info(&dev->dev,
  74                                  "21143 negotiation failed, status %08x\n",
  75                                  csr12);
  76                 if (!(csr12 & 4)) {             /* 10mbps link beat good. */
  77                         new_csr6 = 0x82420000;
  78                         dev->if_port = 0;
  79                         iowrite32(0, ioaddr + CSR13);
  80                         iowrite32(0x0003FFFF, ioaddr + CSR14);
  81                         iowrite16(t21142_csr15[dev->if_port], ioaddr + CSR15);
  82                         iowrite32(t21142_csr13[dev->if_port], ioaddr + CSR13);
  83                 } else {
  84                         /* Select 100mbps port to check for link beat. */
  85                         new_csr6 = 0x83860000;
  86                         dev->if_port = 3;
  87                         iowrite32(0, ioaddr + CSR13);
  88                         iowrite32(0x0003FFFF, ioaddr + CSR14);
  89                         iowrite16(8, ioaddr + CSR15);
  90                         iowrite32(1, ioaddr + CSR13);
  91                 }
  92                 if (tulip_debug > 1)
  93                         dev_info(&dev->dev, "Testing new 21143 media %s\n",
  94                                  medianame[dev->if_port]);
  95                 if (new_csr6 != (tp->csr6 & ~0x00D5)) {
  96                         tp->csr6 &= 0x00D5;
  97                         tp->csr6 |= new_csr6;
  98                         iowrite32(0x0301, ioaddr + CSR12);
  99                         tulip_restart_rxtx(tp);
 100                 }
 101                 next_tick = 3*HZ;
 102         }
 103 
 104         /* mod_timer synchronizes us with potential add_timer calls
 105          * from interrupts.
 106          */
 107         mod_timer(&tp->timer, RUN_AT(next_tick));
 108 }
 109 
 110 
 111 void t21142_start_nway(struct net_device *dev)
 112 {
 113         struct tulip_private *tp = netdev_priv(dev);
 114         void __iomem *ioaddr = tp->base_addr;
 115         int csr14 = ((tp->sym_advertise & 0x0780) << 9)  |
 116                 ((tp->sym_advertise & 0x0020) << 1) | 0xffbf;
 117 
 118         dev->if_port = 0;
 119         tp->nway = tp->mediasense = 1;
 120         tp->nwayset = tp->lpar = 0;
 121         if (tulip_debug > 1)
 122                 netdev_dbg(dev, "Restarting 21143 autonegotiation, csr14=%08x\n",
 123                            csr14);
 124         iowrite32(0x0001, ioaddr + CSR13);
 125         udelay(100);
 126         iowrite32(csr14, ioaddr + CSR14);
 127         tp->csr6 = 0x82420000 | (tp->sym_advertise & 0x0040 ? FullDuplex : 0);
 128         iowrite32(tp->csr6, ioaddr + CSR6);
 129         if (tp->mtable  &&  tp->mtable->csr15dir) {
 130                 iowrite32(tp->mtable->csr15dir, ioaddr + CSR15);
 131                 iowrite32(tp->mtable->csr15val, ioaddr + CSR15);
 132         } else
 133                 iowrite16(0x0008, ioaddr + CSR15);
 134         iowrite32(0x1301, ioaddr + CSR12);              /* Trigger NWAY. */
 135 }
 136 
 137 
 138 
 139 void t21142_lnk_change(struct net_device *dev, int csr5)
 140 {
 141         struct tulip_private *tp = netdev_priv(dev);
 142         void __iomem *ioaddr = tp->base_addr;
 143         int csr12 = ioread32(ioaddr + CSR12);
 144         int csr14 = ioread32(ioaddr + CSR14);
 145 
 146         /* CSR12[LS10,LS100] are not reliable during autonegotiation */
 147         if ((csr14 & 0x80) && (csr12 & 0x7000) != 0x5000)
 148                 csr12 |= 6;
 149         if (tulip_debug > 1)
 150                 dev_info(&dev->dev,
 151                          "21143 link status interrupt %08x, CSR5 %x, %08x\n",
 152                          csr12, csr5, csr14);
 153 
 154         /* If NWay finished and we have a negotiated partner capability. */
 155         if (tp->nway  &&  !tp->nwayset  &&  (csr12 & 0x7000) == 0x5000) {
 156                 int setup_done = 0;
 157                 int negotiated = tp->sym_advertise & (csr12 >> 16);
 158                 tp->lpar = csr12 >> 16;
 159                 tp->nwayset = 1;
 160                 /* If partner cannot negotiate, it is 10Mbps Half Duplex */
 161                 if (!(csr12 & 0x8000))          dev->if_port = 0;
 162                 else if (negotiated & 0x0100)   dev->if_port = 5;
 163                 else if (negotiated & 0x0080)   dev->if_port = 3;
 164                 else if (negotiated & 0x0040)   dev->if_port = 4;
 165                 else if (negotiated & 0x0020)   dev->if_port = 0;
 166                 else {
 167                         tp->nwayset = 0;
 168                         if ((csr12 & 2) == 0  &&  (tp->sym_advertise & 0x0180))
 169                                 dev->if_port = 3;
 170                 }
 171                 tp->full_duplex = (tulip_media_cap[dev->if_port] & MediaAlwaysFD) ? 1:0;
 172 
 173                 if (tulip_debug > 1) {
 174                         if (tp->nwayset)
 175                                 dev_info(&dev->dev,
 176                                          "Switching to %s based on link negotiation %04x & %04x = %04x\n",
 177                                          medianame[dev->if_port],
 178                                          tp->sym_advertise, tp->lpar,
 179                                          negotiated);
 180                         else
 181                                 dev_info(&dev->dev,
 182                                          "Autonegotiation failed, using %s, link beat status %04x\n",
 183                                          medianame[dev->if_port], csr12);
 184                 }
 185 
 186                 if (tp->mtable) {
 187                         int i;
 188                         for (i = 0; i < tp->mtable->leafcount; i++)
 189                                 if (tp->mtable->mleaf[i].media == dev->if_port) {
 190                                         int startup = ! ((tp->chip_id == DC21143 && (tp->revision == 48 || tp->revision == 65)));
 191                                         tp->cur_index = i;
 192                                         tulip_select_media(dev, startup);
 193                                         setup_done = 1;
 194                                         break;
 195                                 }
 196                 }
 197                 if ( ! setup_done) {
 198                         tp->csr6 = (dev->if_port & 1 ? 0x838E0000 : 0x82420000) | (tp->csr6 & 0x20ff);
 199                         if (tp->full_duplex)
 200                                 tp->csr6 |= 0x0200;
 201                         iowrite32(1, ioaddr + CSR13);
 202                 }
 203 #if 0                                                   /* Restart shouldn't be needed. */
 204                 iowrite32(tp->csr6 | RxOn, ioaddr + CSR6);
 205                 if (tulip_debug > 2)
 206                         netdev_dbg(dev, " Restarting Tx and Rx, CSR5 is %08x\n",
 207                                    ioread32(ioaddr + CSR5));
 208 #endif
 209                 tulip_start_rxtx(tp);
 210                 if (tulip_debug > 2)
 211                         netdev_dbg(dev, " Setting CSR6 %08x/%x CSR12 %08x\n",
 212                                    tp->csr6, ioread32(ioaddr + CSR6),
 213                                    ioread32(ioaddr + CSR12));
 214         } else if ((tp->nwayset  &&  (csr5 & 0x08000000) &&
 215                     (dev->if_port == 3  ||  dev->if_port == 5) &&
 216                     (csr12 & 2) == 2) ||
 217                    (tp->nway && (csr5 & (TPLnkFail)))) {
 218                 /* Link blew? Maybe restart NWay. */
 219                 del_timer_sync(&tp->timer);
 220                 t21142_start_nway(dev);
 221                 tp->timer.expires = RUN_AT(3*HZ);
 222                 add_timer(&tp->timer);
 223         } else if (dev->if_port == 3  ||  dev->if_port == 5) {
 224                 if (tulip_debug > 1)
 225                         dev_info(&dev->dev, "21143 %s link beat %s\n",
 226                                  medianame[dev->if_port],
 227                                  (csr12 & 2) ? "failed" : "good");
 228                 if ((csr12 & 2)  &&  ! tp->medialock) {
 229                         del_timer_sync(&tp->timer);
 230                         t21142_start_nway(dev);
 231                         tp->timer.expires = RUN_AT(3*HZ);
 232                         add_timer(&tp->timer);
 233                 } else if (dev->if_port == 5)
 234                         iowrite32(csr14 & ~0x080, ioaddr + CSR14);
 235         } else if (dev->if_port == 0  ||  dev->if_port == 4) {
 236                 if ((csr12 & 4) == 0)
 237                         dev_info(&dev->dev, "21143 10baseT link beat good\n");
 238         } else if (!(csr12 & 4)) {              /* 10mbps link beat good. */
 239                 if (tulip_debug)
 240                         dev_info(&dev->dev, "21143 10mbps sensed media\n");
 241                 dev->if_port = 0;
 242         } else if (tp->nwayset) {
 243                 if (tulip_debug)
 244                         dev_info(&dev->dev, "21143 using NWay-set %s, csr6 %08x\n",
 245                                  medianame[dev->if_port], tp->csr6);
 246         } else {                /* 100mbps link beat good. */
 247                 if (tulip_debug)
 248                         dev_info(&dev->dev, "21143 100baseTx sensed media\n");
 249                 dev->if_port = 3;
 250                 tp->csr6 = 0x838E0000 | (tp->csr6 & 0x20ff);
 251                 iowrite32(0x0003FF7F, ioaddr + CSR14);
 252                 iowrite32(0x0301, ioaddr + CSR12);
 253                 tulip_restart_rxtx(tp);
 254         }
 255 }
 256 
 257