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   1 /*
   2         drivers/net/tulip/21142.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/pci.h>
  18 #include <linux/delay.h>
  19 #include "tulip.h"
  20
  21
  22 static u16 t21142_csr13[] = { 0x0001, 0x0009, 0x0009, 0x0000, 0x0001, };
  23 u16 t21142_csr14[] =        { 0xFFFF, 0x0705, 0x0705, 0x0000, 0x7F3D, };
  24 static u16 t21142_csr15[] = { 0x0008, 0x0006, 0x000E, 0x0008, 0x0008, };
  25
  26
  27 /* Handle the 21143 uniquely: do autoselect with NWay, not the EEPROM list
  28    of available transceivers.  */
  29 void t21142_media_task(struct work_struct *work)
  30 {
  31         struct tulip_private *tp =
  32                 container_of(work, struct tulip_private, media_work);
  33         struct net_device *dev = tp->dev;
  34         void __iomem *ioaddr = tp->base_addr;
  35         int csr12 = ioread32(ioaddr + CSR12);
  36         int next_tick = 60*HZ;
  37         int new_csr6 = 0;
  38
  39         if (tulip_debug > 2)
  40                 printk(KERN_INFO"%s: 21143 negotiation status %8.8x, %s.\n",
  41                            dev->name, csr12, medianame[dev->if_port]);
  42         if (tulip_media_cap[dev->if_port] & MediaIsMII) {
  43                 if (tulip_check_duplex(dev) < 0) {
  44                         netif_carrier_off(dev);
  45                         next_tick = 3*HZ;
  46                 } else {
  47                         netif_carrier_on(dev);
  48                         next_tick = 60*HZ;
  49                 }
  50         } else if (tp->nwayset) {
  51                 /* Don't screw up a negotiated session! */
  52                 if (tulip_debug > 1)
  53                         printk(KERN_INFO"%s: Using NWay-set %s media, csr12 %8.8x.\n",
  54                                    dev->name, medianame[dev->if_port], csr12);
  55         } else if (tp->medialock) {
  56                         ;
  57         } else if (dev->if_port == 3) {
  58                 if (csr12 & 2) {        /* No 100mbps link beat, revert to 10mbps. */
  59                         if (tulip_debug > 1)
  60                                 printk(KERN_INFO"%s: No 21143 100baseTx link beat, %8.8x, "
  61                                            "trying NWay.\n", dev->name, csr12);
  62                         t21142_start_nway(dev);
  63                         next_tick = 3*HZ;
  64                 }
  65         } else if ((csr12 & 0x7000) != 0x5000) {
  66                 /* Negotiation failed.  Search media types. */
  67                 if (tulip_debug > 1)
  68                         printk(KERN_INFO"%s: 21143 negotiation failed, status %8.8x.\n",
  69                                    dev->name, csr12);
  70                 if (!(csr12 & 4)) {             /* 10mbps link beat good. */
  71                         new_csr6 = 0x82420000;
  72                         dev->if_port = 0;
  73                         iowrite32(0, ioaddr + CSR13);
  74                         iowrite32(0x0003FFFF, ioaddr + CSR14);
  75                         iowrite16(t21142_csr15[dev->if_port], ioaddr + CSR15);
  76                         iowrite32(t21142_csr13[dev->if_port], ioaddr + CSR13);
  77                 } else {
  78                         /* Select 100mbps port to check for link beat. */
  79                         new_csr6 = 0x83860000;
  80                         dev->if_port = 3;
  81                         iowrite32(0, ioaddr + CSR13);
  82                         iowrite32(0x0003FF7F, ioaddr + CSR14);
  83                         iowrite16(8, ioaddr + CSR15);
  84                         iowrite32(1, ioaddr + CSR13);
  85                 }
  86                 if (tulip_debug > 1)
  87                         printk(KERN_INFO"%s: Testing new 21143 media %s.\n",
  88                                    dev->name, medianame[dev->if_port]);
  89                 if (new_csr6 != (tp->csr6 & ~0x00D5)) {
  90                         tp->csr6 &= 0x00D5;
  91                         tp->csr6 |= new_csr6;
  92                         iowrite32(0x0301, ioaddr + CSR12);
  93                         tulip_restart_rxtx(tp);
  94                 }
  95                 next_tick = 3*HZ;
  96         }
  97
  98         /* mod_timer synchronizes us with potential add_timer calls
  99          * from interrupts.
 100          */
 101         mod_timer(&tp->timer, RUN_AT(next_tick));
 102 }
 103
 104
 105 void t21142_start_nway(struct net_device *dev)
 106 {
 107         struct tulip_private *tp = netdev_priv(dev);
 108         void __iomem *ioaddr = tp->base_addr;
 109         int csr14 = ((tp->sym_advertise & 0x0780) << 9)  |
 110                 ((tp->sym_advertise & 0x0020) << 1) | 0xffbf;
 111
 112         dev->if_port = 0;
 113         tp->nway = tp->mediasense = 1;
 114         tp->nwayset = tp->lpar = 0;
 115         if (tulip_debug > 1)
 116                 printk(KERN_DEBUG "%s: Restarting 21143 autonegotiation, csr14=%8.8x.\n",
 117                            dev->name, csr14);
 118         iowrite32(0x0001, ioaddr + CSR13);
 119         udelay(100);
 120         iowrite32(csr14, ioaddr + CSR14);
 121         tp->csr6 = 0x82420000 | (tp->sym_advertise & 0x0040 ? FullDuplex : 0);
 122         iowrite32(tp->csr6, ioaddr + CSR6);
 123         if (tp->mtable  &&  tp->mtable->csr15dir) {
 124                 iowrite32(tp->mtable->csr15dir, ioaddr + CSR15);
 125                 iowrite32(tp->mtable->csr15val, ioaddr + CSR15);
 126         } else
 127                 iowrite16(0x0008, ioaddr + CSR15);
 128         iowrite32(0x1301, ioaddr + CSR12);              /* Trigger NWAY. */
 129 }
 130
 131
 132
 133 void t21142_lnk_change(struct net_device *dev, int csr5)
 134 {
 135         struct tulip_private *tp = netdev_priv(dev);
 136         void __iomem *ioaddr = tp->base_addr;
 137         int csr12 = ioread32(ioaddr + CSR12);
 138
 139         if (tulip_debug > 1)
 140                 printk(KERN_INFO"%s: 21143 link status interrupt %8.8x, CSR5 %x, "
 141                            "%8.8x.\n", dev->name, csr12, csr5, ioread32(ioaddr + CSR14));
 142
 143         /* If NWay finished and we have a negotiated partner capability. */
 144         if (tp->nway  &&  !tp->nwayset  &&  (csr12 & 0x7000) == 0x5000) {
 145                 int setup_done = 0;
 146                 int negotiated = tp->sym_advertise & (csr12 >> 16);
 147                 tp->lpar = csr12 >> 16;
 148                 tp->nwayset = 1;
 149                 if (negotiated & 0x0100)                dev->if_port = 5;
 150                 else if (negotiated & 0x0080)   dev->if_port = 3;
 151                 else if (negotiated & 0x0040)   dev->if_port = 4;
 152                 else if (negotiated & 0x0020)   dev->if_port = 0;
 153                 else {
 154                         tp->nwayset = 0;
 155                         if ((csr12 & 2) == 0  &&  (tp->sym_advertise & 0x0180))
 156                                 dev->if_port = 3;
 157                 }
 158                 tp->full_duplex = (tulip_media_cap[dev->if_port] & MediaAlwaysFD) ? 1:0;
 159
 160                 if (tulip_debug > 1) {
 161                         if (tp->nwayset)
 162                                 printk(KERN_INFO "%s: Switching to %s based on link "
 163                                            "negotiation %4.4x & %4.4x = %4.4x.\n",
 164                                            dev->name, medianame[dev->if_port], tp->sym_advertise,
 165                                            tp->lpar, negotiated);
 166                         else
 167                                 printk(KERN_INFO "%s: Autonegotiation failed, using %s,"
 168                                            " link beat status %4.4x.\n",
 169                                            dev->name, medianame[dev->if_port], csr12);
 170                 }
 171
 172                 if (tp->mtable) {
 173                         int i;
 174                         for (i = 0; i < tp->mtable->leafcount; i++)
 175                                 if (tp->mtable->mleaf[i].media == dev->if_port) {
 176                                         int startup = ! ((tp->chip_id == DC21143 && (tp->revision == 48 || tp->revision == 65)));
 177                                         tp->cur_index = i;
 178                                         tulip_select_media(dev, startup);
 179                                         setup_done = 1;
 180                                         break;
 181                                 }
 182                 }
 183                 if ( ! setup_done) {
 184                         tp->csr6 = (dev->if_port & 1 ? 0x838E0000 : 0x82420000) | (tp->csr6 & 0x20ff);
 185                         if (tp->full_duplex)
 186                                 tp->csr6 |= 0x0200;
 187                         iowrite32(1, ioaddr + CSR13);
 188                 }
 189 #if 0                                                   /* Restart shouldn't be needed. */
 190                 iowrite32(tp->csr6 | RxOn, ioaddr + CSR6);
 191                 if (tulip_debug > 2)
 192                         printk(KERN_DEBUG "%s:  Restarting Tx and Rx, CSR5 is %8.8x.\n",
 193                                    dev->name, ioread32(ioaddr + CSR5));
 194 #endif
 195                 tulip_start_rxtx(tp);
 196                 if (tulip_debug > 2)
 197                         printk(KERN_DEBUG "%s:  Setting CSR6 %8.8x/%x CSR12 %8.8x.\n",
 198                                    dev->name, tp->csr6, ioread32(ioaddr + CSR6),
 199                                    ioread32(ioaddr + CSR12));
 200         } else if ((tp->nwayset  &&  (csr5 & 0x08000000)
 201                                 && (dev->if_port == 3  ||  dev->if_port == 5)
 202                                 && (csr12 & 2) == 2) ||
 203                            (tp->nway && (csr5 & (TPLnkFail)))) {
 204                 /* Link blew? Maybe restart NWay. */
 205                 del_timer_sync(&tp->timer);
 206                 t21142_start_nway(dev);
 207                 tp->timer.expires = RUN_AT(3*HZ);
 208                 add_timer(&tp->timer);
 209         } else if (dev->if_port == 3  ||  dev->if_port == 5) {
 210                 if (tulip_debug > 1)
 211                         printk(KERN_INFO"%s: 21143 %s link beat %s.\n",
 212                                    dev->name, medianame[dev->if_port],
 213                                    (csr12 & 2) ? "failed" : "good");
 214                 if ((csr12 & 2)  &&  ! tp->medialock) {
 215                         del_timer_sync(&tp->timer);
 216                         t21142_start_nway(dev);
 217                         tp->timer.expires = RUN_AT(3*HZ);
 218                         add_timer(&tp->timer);
 219                 } else if (dev->if_port == 5)
 220                         iowrite32(ioread32(ioaddr + CSR14) & ~0x080, ioaddr + CSR14);
 221         } else if (dev->if_port == 0  ||  dev->if_port == 4) {
 222                 if ((csr12 & 4) == 0)
 223                         printk(KERN_INFO"%s: 21143 10baseT link beat good.\n",
 224                                    dev->name);
 225         } else if (!(csr12 & 4)) {              /* 10mbps link beat good. */
 226                 if (tulip_debug)
 227                         printk(KERN_INFO"%s: 21143 10mbps sensed media.\n",
 228                                    dev->name);
 229                 dev->if_port = 0;
 230         } else if (tp->nwayset) {
 231                 if (tulip_debug)
 232                         printk(KERN_INFO"%s: 21143 using NWay-set %s, csr6 %8.8x.\n",
 233                                    dev->name, medianame[dev->if_port], tp->csr6);
 234         } else {                /* 100mbps link beat good. */
 235                 if (tulip_debug)
 236                         printk(KERN_INFO"%s: 21143 100baseTx sensed media.\n",
 237                                    dev->name);
 238                 dev->if_port = 3;
 239                 tp->csr6 = 0x838E0000 | (tp->csr6 & 0x20ff);
 240                 iowrite32(0x0003FF7F, ioaddr + CSR14);
 241                 iowrite32(0x0301, ioaddr + CSR12);
 242                 tulip_restart_rxtx(tp);
 243         }
 244 }
 245
 246