arch/m68k/sun3/idprom.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * idprom.c: Routines to load the idprom into kernel addresses and
   4  *           interpret the data contained within.
   5  *
   6  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
   7  * Sun3/3x models added by David Monro (davidm@psrg.cs.usyd.edu.au)
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/init.h>
  14 #include <linux/string.h>
  15
  16 #include <asm/oplib.h>
  17 #include <asm/idprom.h>
  18 #include <asm/machines.h>  /* Fun with Sun released architectures. */
  19
  20 struct idprom *idprom;
  21 EXPORT_SYMBOL(idprom);
  22
  23 static struct idprom idprom_buffer;
  24
  25 /* Here is the master table of Sun machines which use some implementation
  26  * of the Sparc CPU and have a meaningful IDPROM machtype value that we
  27  * know about.  See asm-sparc/machines.h for empirical constants.
  28  */
  29 static struct Sun_Machine_Models Sun_Machines[NUM_SUN_MACHINES] = {
  30 /* First, Sun3's */
  31     { .name = "Sun 3/160 Series",       .id_machtype = (SM_SUN3 | SM_3_160) },
  32     { .name = "Sun 3/50",               .id_machtype = (SM_SUN3 | SM_3_50) },
  33     { .name = "Sun 3/260 Series",       .id_machtype = (SM_SUN3 | SM_3_260) },
  34     { .name = "Sun 3/110 Series",       .id_machtype = (SM_SUN3 | SM_3_110) },
  35     { .name = "Sun 3/60",               .id_machtype = (SM_SUN3 | SM_3_60) },
  36     { .name = "Sun 3/E",                .id_machtype = (SM_SUN3 | SM_3_E) },
  37 /* Now, Sun3x's */
  38     { .name = "Sun 3/460 Series",       .id_machtype = (SM_SUN3X | SM_3_460) },
  39     { .name = "Sun 3/80",               .id_machtype = (SM_SUN3X | SM_3_80) },
  40 /* Then, Sun4's */
  41 // { .name = "Sun 4/100 Series",        .id_machtype = (SM_SUN4 | SM_4_110) },
  42 // { .name = "Sun 4/200 Series",        .id_machtype = (SM_SUN4 | SM_4_260) },
  43 // { .name = "Sun 4/300 Series",        .id_machtype = (SM_SUN4 | SM_4_330) },
  44 // { .name = "Sun 4/400 Series",        .id_machtype = (SM_SUN4 | SM_4_470) },
  45 /* And now, Sun4c's */
  46 // { .name = "Sun4c SparcStation 1",    .id_machtype = (SM_SUN4C | SM_4C_SS1) },
  47 // { .name = "Sun4c SparcStation IPC",  .id_machtype = (SM_SUN4C | SM_4C_IPC) },
  48 // { .name = "Sun4c SparcStation 1+",   .id_machtype = (SM_SUN4C | SM_4C_SS1PLUS) },
  49 // { .name = "Sun4c SparcStation SLC",  .id_machtype = (SM_SUN4C | SM_4C_SLC) },
  50 // { .name = "Sun4c SparcStation 2",    .id_machtype = (SM_SUN4C | SM_4C_SS2) },
  51 // { .name = "Sun4c SparcStation ELC",  .id_machtype = (SM_SUN4C | SM_4C_ELC) },
  52 // { .name = "Sun4c SparcStation IPX",  .id_machtype = (SM_SUN4C | SM_4C_IPX) },
  53 /* Finally, early Sun4m's */
  54 // { .name = "Sun4m SparcSystem600",    .id_machtype = (SM_SUN4M | SM_4M_SS60) },
  55 // { .name = "Sun4m SparcStation10/20", .id_machtype = (SM_SUN4M | SM_4M_SS50) },
  56 // { .name = "Sun4m SparcStation5",     .id_machtype = (SM_SUN4M | SM_4M_SS40) },
  57 /* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */
  58 // { .name = "Sun4M OBP based system",  .id_machtype = (SM_SUN4M_OBP | 0x0) }
  59 };
  60
  61 static void __init display_system_type(unsigned char machtype)
  62 {
  63         register int i;
  64
  65         for (i = 0; i < NUM_SUN_MACHINES; i++) {
  66                 if(Sun_Machines[i].id_machtype == machtype) {
  67                         if (machtype != (SM_SUN4M_OBP | 0x00))
  68                                 pr_info("TYPE: %s\n", Sun_Machines[i].name);
  69                         else {
  70 #if 0
  71                                 char sysname[128];
  72
  73                                 prom_getproperty(prom_root_node, "banner-name",
  74                                                  sysname, sizeof(sysname));
  75                                 pr_info("TYPE: %s\n", sysname);
  76 #endif
  77                         }
  78                         return;
  79                 }
  80         }
  81
  82         prom_printf("IDPROM: Bogus id_machtype value, 0x%x\n", machtype);
  83         prom_halt();
  84 }
  85
  86 void sun3_get_model(unsigned char* model)
  87 {
  88         register int i;
  89
  90         for (i = 0; i < NUM_SUN_MACHINES; i++) {
  91                 if(Sun_Machines[i].id_machtype == idprom->id_machtype) {
  92                         strcpy(model, Sun_Machines[i].name);
  93                         return;
  94                 }
  95         }
  96 }
  97
  98
  99
 100 /* Calculate the IDPROM checksum (xor of the data bytes). */
 101 static unsigned char __init calc_idprom_cksum(struct idprom *idprom)
 102 {
 103         unsigned char cksum, i, *ptr = (unsigned char *)idprom;
 104
 105         for (i = cksum = 0; i <= 0x0E; i++)
 106                 cksum ^= *ptr++;
 107
 108         return cksum;
 109 }
 110
 111 /* Create a local IDPROM copy, verify integrity, and display information. */
 112 void __init idprom_init(void)
 113 {
 114         prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));
 115
 116         idprom = &idprom_buffer;
 117
 118         if (idprom->id_format != 0x01)  {
 119                 prom_printf("IDPROM: Unknown format type!\n");
 120                 prom_halt();
 121         }
 122
 123         if (idprom->id_cksum != calc_idprom_cksum(idprom)) {
 124                 prom_printf("IDPROM: Checksum failure (nvram=%x, calc=%x)!\n",
 125                             idprom->id_cksum, calc_idprom_cksum(idprom));
 126                 prom_halt();
 127         }
 128
 129         display_system_type(idprom->id_machtype);
 130
 131         pr_info("Ethernet address: %pM\n", idprom->id_ethaddr);
 132 }