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   1 /*
   2         drivers/net/tulip/eeprom.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         Please submit bug reports to http://bugzilla.kernel.org/.
  13 */
  14
  15 #include <linux/pci.h>
  16 #include "tulip.h"
  17 #include <linux/init.h>
  18 #include <asm/unaligned.h>
  19
  20
  21
  22 /* Serial EEPROM section. */
  23 /* The main routine to parse the very complicated SROM structure.
  24    Search www.digital.com for "21X4 SROM" to get details.
  25    This code is very complex, and will require changes to support
  26    additional cards, so I'll be verbose about what is going on.
  27    */
  28
  29 /* Known cards that have old-style EEPROMs. */
  30 static struct eeprom_fixup eeprom_fixups[] __devinitdata = {
  31   {"Asante", 0, 0, 0x94, {0x1e00, 0x0000, 0x0800, 0x0100, 0x018c,
  32                           0x0000, 0x0000, 0xe078, 0x0001, 0x0050, 0x0018 }},
  33   {"SMC9332DST", 0, 0, 0xC0, { 0x1e00, 0x0000, 0x0800, 0x041f,
  34                            0x0000, 0x009E, /* 10baseT */
  35                            0x0004, 0x009E, /* 10baseT-FD */
  36                            0x0903, 0x006D, /* 100baseTx */
  37                            0x0905, 0x006D, /* 100baseTx-FD */ }},
  38   {"Cogent EM100", 0, 0, 0x92, { 0x1e00, 0x0000, 0x0800, 0x063f,
  39                                  0x0107, 0x8021, /* 100baseFx */
  40                                  0x0108, 0x8021, /* 100baseFx-FD */
  41                                  0x0100, 0x009E, /* 10baseT */
  42                                  0x0104, 0x009E, /* 10baseT-FD */
  43                                  0x0103, 0x006D, /* 100baseTx */
  44                                  0x0105, 0x006D, /* 100baseTx-FD */ }},
  45   {"Maxtech NX-110", 0, 0, 0xE8, { 0x1e00, 0x0000, 0x0800, 0x0513,
  46                                    0x1001, 0x009E, /* 10base2, CSR12 0x10*/
  47                                    0x0000, 0x009E, /* 10baseT */
  48                                    0x0004, 0x009E, /* 10baseT-FD */
  49                                    0x0303, 0x006D, /* 100baseTx, CSR12 0x03 */
  50                                    0x0305, 0x006D, /* 100baseTx-FD CSR12 0x03 */}},
  51   {"Accton EN1207", 0, 0, 0xE8, { 0x1e00, 0x0000, 0x0800, 0x051F,
  52                                   0x1B01, 0x0000, /* 10base2,   CSR12 0x1B */
  53                                   0x0B00, 0x009E, /* 10baseT,   CSR12 0x0B */
  54                                   0x0B04, 0x009E, /* 10baseT-FD,CSR12 0x0B */
  55                                   0x1B03, 0x006D, /* 100baseTx, CSR12 0x1B */
  56                                   0x1B05, 0x006D, /* 100baseTx-FD CSR12 0x1B */
  57    }},
  58   {"NetWinder", 0x00, 0x10, 0x57,
  59         /* Default media = MII
  60          * MII block, reset sequence (3) = 0x0821 0x0000 0x0001, capabilities 0x01e1
  61          */
  62         { 0x1e00, 0x0000, 0x000b, 0x8f01, 0x0103, 0x0300, 0x0821, 0x000, 0x0001, 0x0000, 0x01e1 }
  63   },
  64   {"Cobalt Microserver", 0, 0x10, 0xE0, {0x1e00, /* 0 == controller #, 1e == offset     */
  65                                          0x0000, /* 0 == high offset, 0 == gap          */
  66                                          0x0800, /* Default Autoselect                  */
  67                                          0x8001, /* 1 leaf, extended type, bogus len    */
  68                                          0x0003, /* Type 3 (MII), PHY #0                */
  69                                          0x0400, /* 0 init instr, 4 reset instr         */
  70                                          0x0801, /* Set control mode, GP0 output        */
  71                                          0x0000, /* Drive GP0 Low (RST is active low)   */
  72                                          0x0800, /* control mode, GP0 input (undriven)  */
  73                                          0x0000, /* clear control mode                  */
  74                                          0x7800, /* 100TX FDX + HDX, 10bT FDX + HDX     */
  75                                          0x01e0, /* Advertise all above                 */
  76                                          0x5000, /* FDX all above                       */
  77                                          0x1800, /* Set fast TTM in 100bt modes         */
  78                                          0x0000, /* PHY cannot be unplugged             */
  79   }},
  80   {NULL}};
  81
  82
  83 static const char *block_name[] __devinitdata = {
  84         "21140 non-MII",
  85         "21140 MII PHY",
  86         "21142 Serial PHY",
  87         "21142 MII PHY",
  88         "21143 SYM PHY",
  89         "21143 reset method"
  90 };
  91
  92
  93 /**
  94  * tulip_build_fake_mediatable - Build a fake mediatable entry.
  95  * @tp: Ptr to the tulip private data.
  96  *
  97  * Some cards like the 3x5 HSC cards (J3514A) do not have a standard
  98  * srom and can not be handled under the fixup routine.  These cards
  99  * still need a valid mediatable entry for correct csr12 setup and
 100  * mii handling.
 101  *
 102  * Since this is currently a parisc-linux specific function, the
 103  * #ifdef __hppa__ should completely optimize this function away for
 104  * non-parisc hardware.
 105  */
 106 static void __devinit tulip_build_fake_mediatable(struct tulip_private *tp)
 107 {
 108 #ifdef CONFIG_GSC
 109         if (tp->flags & NEEDS_FAKE_MEDIA_TABLE) {
 110                 static unsigned char leafdata[] =
 111                         { 0x01,       /* phy number */
 112                           0x02,       /* gpr setup sequence length */
 113                           0x02, 0x00, /* gpr setup sequence */
 114                           0x02,       /* phy reset sequence length */
 115                           0x01, 0x00, /* phy reset sequence */
 116                           0x00, 0x78, /* media capabilities */
 117                           0x00, 0xe0, /* nway advertisment */
 118                           0x00, 0x05, /* fdx bit map */
 119                           0x00, 0x06  /* ttm bit map */
 120                         };
 121
 122                 tp->mtable = (struct mediatable *)
 123                         kmalloc(sizeof(struct mediatable) + sizeof(struct medialeaf), GFP_KERNEL);
 124
 125                 if (tp->mtable == NULL)
 126                         return; /* Horrible, impossible failure. */
 127
 128                 tp->mtable->defaultmedia = 0x800;
 129                 tp->mtable->leafcount = 1;
 130                 tp->mtable->csr12dir = 0x3f; /* inputs on bit7 for hsc-pci, bit6 for pci-fx */
 131                 tp->mtable->has_nonmii = 0;
 132                 tp->mtable->has_reset = 0;
 133                 tp->mtable->has_mii = 1;
 134                 tp->mtable->csr15dir = tp->mtable->csr15val = 0;
 135                 tp->mtable->mleaf[0].type = 1;
 136                 tp->mtable->mleaf[0].media = 11;
 137                 tp->mtable->mleaf[0].leafdata = &leafdata[0];
 138                 tp->flags |= HAS_PHY_IRQ;
 139                 tp->csr12_shadow = -1;
 140         }
 141 #endif
 142 }
 143
 144 void __devinit tulip_parse_eeprom(struct net_device *dev)
 145 {
 146         /* The last media info list parsed, for multiport boards.  */
 147         static struct mediatable *last_mediatable;
 148         static unsigned char *last_ee_data;
 149         static int controller_index;
 150         struct tulip_private *tp = netdev_priv(dev);
 151         unsigned char *ee_data = tp->eeprom;
 152         int i;
 153
 154         tp->mtable = NULL;
 155         /* Detect an old-style (SA only) EEPROM layout:
 156            memcmp(eedata, eedata+16, 8). */
 157         for (i = 0; i < 8; i ++)
 158                 if (ee_data[i] != ee_data[16+i])
 159                         break;
 160         if (i >= 8) {
 161                 if (ee_data[0] == 0xff) {
 162                         if (last_mediatable) {
 163                                 controller_index++;
 164                                 dev_info(&dev->dev,
 165                                          "Controller %d of multiport board\n",
 166                                          controller_index);
 167                                 tp->mtable = last_mediatable;
 168                                 ee_data = last_ee_data;
 169                                 goto subsequent_board;
 170                         } else
 171                                 dev_info(&dev->dev,
 172                                          "Missing EEPROM, this interface may not work correctly!\n");
 173                         return;
 174                 }
 175           /* Do a fix-up based on the vendor half of the station address prefix. */
 176           for (i = 0; eeprom_fixups[i].name; i++) {
 177                   if (dev->dev_addr[0] == eeprom_fixups[i].addr0 &&
 178                       dev->dev_addr[1] == eeprom_fixups[i].addr1 &&
 179                       dev->dev_addr[2] == eeprom_fixups[i].addr2) {
 180                   if (dev->dev_addr[2] == 0xE8 && ee_data[0x1a] == 0x55)
 181                           i++;                  /* An Accton EN1207, not an outlaw Maxtech. */
 182                   memcpy(ee_data + 26, eeprom_fixups[i].newtable,
 183                                  sizeof(eeprom_fixups[i].newtable));
 184                   dev_info(&dev->dev,
 185                            "Old format EEPROM on '%s' board.  Using substitute media control info\n",
 186                            eeprom_fixups[i].name);
 187                   break;
 188                 }
 189           }
 190           if (eeprom_fixups[i].name == NULL) { /* No fixup found. */
 191                   dev_info(&dev->dev,
 192                            "Old style EEPROM with no media selection information\n");
 193                 return;
 194           }
 195         }
 196
 197         controller_index = 0;
 198         if (ee_data[19] > 1) {          /* Multiport board. */
 199                 last_ee_data = ee_data;
 200         }
 201 subsequent_board:
 202
 203         if (ee_data[27] == 0) {         /* No valid media table. */
 204                 tulip_build_fake_mediatable(tp);
 205         } else {
 206                 unsigned char *p = (void *)ee_data + ee_data[27];
 207                 unsigned char csr12dir = 0;
 208                 int count, new_advertise = 0;
 209                 struct mediatable *mtable;
 210                 u16 media = get_u16(p);
 211
 212                 p += 2;
 213                 if (tp->flags & CSR12_IN_SROM)
 214                         csr12dir = *p++;
 215                 count = *p++;
 216
 217                 /* there is no phy information, don't even try to build mtable */
 218                 if (count == 0) {
 219                         if (tulip_debug > 0)
 220                                 dev_warn(&dev->dev,
 221                                          "no phy info, aborting mtable build\n");
 222                         return;
 223                 }
 224
 225                 mtable = (struct mediatable *)
 226                         kmalloc(sizeof(struct mediatable) + count*sizeof(struct medialeaf),
 227                                         GFP_KERNEL);
 228                 if (mtable == NULL)
 229                         return;                         /* Horrible, impossible failure. */
 230                 last_mediatable = tp->mtable = mtable;
 231                 mtable->defaultmedia = media;
 232                 mtable->leafcount = count;
 233                 mtable->csr12dir = csr12dir;
 234                 mtable->has_nonmii = mtable->has_mii = mtable->has_reset = 0;
 235                 mtable->csr15dir = mtable->csr15val = 0;
 236
 237                 dev_info(&dev->dev, "EEPROM default media type %s\n",
 238                          media & 0x0800 ? "Autosense" : medianame[media & MEDIA_MASK]);
 239                 for (i = 0; i < count; i++) {
 240                         struct medialeaf *leaf = &mtable->mleaf[i];
 241
 242                         if ((p[0] & 0x80) == 0) { /* 21140 Compact block. */
 243                                 leaf->type = 0;
 244                                 leaf->media = p[0] & 0x3f;
 245                                 leaf->leafdata = p;
 246                                 if ((p[2] & 0x61) == 0x01)      /* Bogus, but Znyx boards do it. */
 247                                         mtable->has_mii = 1;
 248                                 p += 4;
 249                         } else {
 250                                 leaf->type = p[1];
 251                                 if (p[1] == 0x05) {
 252                                         mtable->has_reset = i;
 253                                         leaf->media = p[2] & 0x0f;
 254                                 } else if (tp->chip_id == DM910X && p[1] == 0x80) {
 255                                         /* Hack to ignore Davicom delay period block */
 256                                         mtable->leafcount--;
 257                                         count--;
 258                                         i--;
 259                                         leaf->leafdata = p + 2;
 260                                         p += (p[0] & 0x3f) + 1;
 261                                         continue;
 262                                 } else if (p[1] & 1) {
 263                                         int gpr_len, reset_len;
 264
 265                                         mtable->has_mii = 1;
 266                                         leaf->media = 11;
 267                                         gpr_len=p[3]*2;
 268                                         reset_len=p[4+gpr_len]*2;
 269                                         new_advertise |= get_u16(&p[7+gpr_len+reset_len]);
 270                                 } else {
 271                                         mtable->has_nonmii = 1;
 272                                         leaf->media = p[2] & MEDIA_MASK;
 273                                         /* Davicom's media number for 100BaseTX is strange */
 274                                         if (tp->chip_id == DM910X && leaf->media == 1)
 275                                                 leaf->media = 3;
 276                                         switch (leaf->media) {
 277                                         case 0: new_advertise |= 0x0020; break;
 278                                         case 4: new_advertise |= 0x0040; break;
 279                                         case 3: new_advertise |= 0x0080; break;
 280                                         case 5: new_advertise |= 0x0100; break;
 281                                         case 6: new_advertise |= 0x0200; break;
 282                                         }
 283                                         if (p[1] == 2  &&  leaf->media == 0) {
 284                                                 if (p[2] & 0x40) {
 285                                                         u32 base15 = get_unaligned((u16*)&p[7]);
 286                                                         mtable->csr15dir =
 287                                                                 (get_unaligned((u16*)&p[9])<<16) + base15;
 288                                                         mtable->csr15val =
 289                                                                 (get_unaligned((u16*)&p[11])<<16) + base15;
 290                                                 } else {
 291                                                         mtable->csr15dir = get_unaligned((u16*)&p[3])<<16;
 292                                                         mtable->csr15val = get_unaligned((u16*)&p[5])<<16;
 293                                                 }
 294                                         }
 295                                 }
 296                                 leaf->leafdata = p + 2;
 297                                 p += (p[0] & 0x3f) + 1;
 298                         }
 299                         if (tulip_debug > 1  &&  leaf->media == 11) {
 300                                 unsigned char *bp = leaf->leafdata;
 301                                 dev_info(&dev->dev,
 302                                          "MII interface PHY %d, setup/reset sequences %d/%d long, capabilities %02x %02x\n",
 303                                          bp[0], bp[1], bp[2 + bp[1]*2],
 304                                          bp[5 + bp[2 + bp[1]*2]*2],
 305                                          bp[4 + bp[2 + bp[1]*2]*2]);
 306                         }
 307                         dev_info(&dev->dev,
 308                                  "Index #%d - Media %s (#%d) described by a %s (%d) block\n",
 309                                  i, medianame[leaf->media & 15], leaf->media,
 310                                  leaf->type < ARRAY_SIZE(block_name) ? block_name[leaf->type] : "<unknown>",
 311                                  leaf->type);
 312                 }
 313                 if (new_advertise)
 314                         tp->sym_advertise = new_advertise;
 315         }
 316 }
 317 /* Reading a serial EEPROM is a "bit" grungy, but we work our way through:->.*/
 318
 319 /*  EEPROM_Ctrl bits. */
 320 #define EE_SHIFT_CLK    0x02    /* EEPROM shift clock. */
 321 #define EE_CS           0x01    /* EEPROM chip select. */
 322 #define EE_DATA_WRITE   0x04    /* Data from the Tulip to EEPROM. */
 323 #define EE_WRITE_0      0x01
 324 #define EE_WRITE_1      0x05
 325 #define EE_DATA_READ    0x08    /* Data from the EEPROM chip. */
 326 #define EE_ENB          (0x4800 | EE_CS)
 327
 328 /* Delay between EEPROM clock transitions.
 329    Even at 33Mhz current PCI implementations don't overrun the EEPROM clock.
 330    We add a bus turn-around to insure that this remains true. */
 331 #define eeprom_delay()  ioread32(ee_addr)
 332
 333 /* The EEPROM commands include the alway-set leading bit. */
 334 #define EE_READ_CMD             (6)
 335
 336 /* Note: this routine returns extra data bits for size detection. */
 337 int __devinit tulip_read_eeprom(struct net_device *dev, int location, int addr_len)
 338 {
 339         int i;
 340         unsigned retval = 0;
 341         struct tulip_private *tp = netdev_priv(dev);
 342         void __iomem *ee_addr = tp->base_addr + CSR9;
 343         int read_cmd = location | (EE_READ_CMD << addr_len);
 344
 345         /* If location is past the end of what we can address, don't
 346          * read some other location (ie truncate). Just return zero.
 347          */
 348         if (location > (1 << addr_len) - 1)
 349                 return 0;
 350
 351         iowrite32(EE_ENB & ~EE_CS, ee_addr);
 352         iowrite32(EE_ENB, ee_addr);
 353
 354         /* Shift the read command bits out. */
 355         for (i = 4 + addr_len; i >= 0; i--) {
 356                 short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
 357                 iowrite32(EE_ENB | dataval, ee_addr);
 358                 eeprom_delay();
 359                 iowrite32(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
 360                 eeprom_delay();
 361                 retval = (retval << 1) | ((ioread32(ee_addr) & EE_DATA_READ) ? 1 : 0);
 362         }
 363         iowrite32(EE_ENB, ee_addr);
 364         eeprom_delay();
 365
 366         for (i = 16; i > 0; i--) {
 367                 iowrite32(EE_ENB | EE_SHIFT_CLK, ee_addr);
 368                 eeprom_delay();
 369                 retval = (retval << 1) | ((ioread32(ee_addr) & EE_DATA_READ) ? 1 : 0);
 370                 iowrite32(EE_ENB, ee_addr);
 371                 eeprom_delay();
 372         }
 373
 374         /* Terminate the EEPROM access. */
 375         iowrite32(EE_ENB & ~EE_CS, ee_addr);
 376         return (tp->flags & HAS_SWAPPED_SEEPROM) ? swab16(retval) : retval;
 377 }
 378