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 #include "sun3.h"
21
22 struct idprom *idprom;
23 EXPORT_SYMBOL(idprom);
24
25 static struct idprom idprom_buffer;
26
27 /* Here is the master table of Sun machines which use some implementation
28 * of the Sparc CPU and have a meaningful IDPROM machtype value that we
29 * know about. See asm-sparc/machines.h for empirical constants.
30 */
31 static struct Sun_Machine_Models Sun_Machines[NUM_SUN_MACHINES] = {
32 /* First, Sun3's */
33 { .name = "Sun 3/160 Series", .id_machtype = (SM_SUN3 | SM_3_160) },
34 { .name = "Sun 3/50", .id_machtype = (SM_SUN3 | SM_3_50) },
35 { .name = "Sun 3/260 Series", .id_machtype = (SM_SUN3 | SM_3_260) },
36 { .name = "Sun 3/110 Series", .id_machtype = (SM_SUN3 | SM_3_110) },
37 { .name = "Sun 3/60", .id_machtype = (SM_SUN3 | SM_3_60) },
38 { .name = "Sun 3/E", .id_machtype = (SM_SUN3 | SM_3_E) },
39 /* Now, Sun3x's */
40 { .name = "Sun 3/460 Series", .id_machtype = (SM_SUN3X | SM_3_460) },
41 { .name = "Sun 3/80", .id_machtype = (SM_SUN3X | SM_3_80) },
42 /* Then, Sun4's */
43 // { .name = "Sun 4/100 Series", .id_machtype = (SM_SUN4 | SM_4_110) },
44 // { .name = "Sun 4/200 Series", .id_machtype = (SM_SUN4 | SM_4_260) },
45 // { .name = "Sun 4/300 Series", .id_machtype = (SM_SUN4 | SM_4_330) },
46 // { .name = "Sun 4/400 Series", .id_machtype = (SM_SUN4 | SM_4_470) },
47 /* And now, Sun4c's */
48 // { .name = "Sun4c SparcStation 1", .id_machtype = (SM_SUN4C | SM_4C_SS1) },
49 // { .name = "Sun4c SparcStation IPC", .id_machtype = (SM_SUN4C | SM_4C_IPC) },
50 // { .name = "Sun4c SparcStation 1+", .id_machtype = (SM_SUN4C | SM_4C_SS1PLUS) },
51 // { .name = "Sun4c SparcStation SLC", .id_machtype = (SM_SUN4C | SM_4C_SLC) },
52 // { .name = "Sun4c SparcStation 2", .id_machtype = (SM_SUN4C | SM_4C_SS2) },
53 // { .name = "Sun4c SparcStation ELC", .id_machtype = (SM_SUN4C | SM_4C_ELC) },
54 // { .name = "Sun4c SparcStation IPX", .id_machtype = (SM_SUN4C | SM_4C_IPX) },
55 /* Finally, early Sun4m's */
56 // { .name = "Sun4m SparcSystem600", .id_machtype = (SM_SUN4M | SM_4M_SS60) },
57 // { .name = "Sun4m SparcStation10/20", .id_machtype = (SM_SUN4M | SM_4M_SS50) },
58 // { .name = "Sun4m SparcStation5", .id_machtype = (SM_SUN4M | SM_4M_SS40) },
59 /* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */
60 // { .name = "Sun4M OBP based system", .id_machtype = (SM_SUN4M_OBP | 0x0) }
61 };
62
63 static void __init display_system_type(unsigned char machtype)
64 {
65 register int i;
66
67 for (i = 0; i < NUM_SUN_MACHINES; i++) {
68 if(Sun_Machines[i].id_machtype == machtype) {
69 if (machtype != (SM_SUN4M_OBP | 0x00))
70 pr_info("TYPE: %s\n", Sun_Machines[i].name);
71 else {
72 #if 0
73 char sysname[128];
74
75 prom_getproperty(prom_root_node, "banner-name",
76 sysname, sizeof(sysname));
77 pr_info("TYPE: %s\n", sysname);
78 #endif
79 }
80 return;
81 }
82 }
83
84 prom_printf("IDPROM: Bogus id_machtype value, 0x%x\n", machtype);
85 prom_halt();
86 }
87
88 void sun3_get_model(char *model)
89 {
90 register int i;
91
92 for (i = 0; i < NUM_SUN_MACHINES; i++) {
93 if(Sun_Machines[i].id_machtype == idprom->id_machtype) {
94 strcpy(model, Sun_Machines[i].name);
95 return;
96 }
97 }
98 }
99
100
101
102 /* Calculate the IDPROM checksum (xor of the data bytes). */
103 static unsigned char __init calc_idprom_cksum(struct idprom *idprom)
104 {
105 unsigned char cksum, i, *ptr = (unsigned char *)idprom;
106
107 for (i = cksum = 0; i <= 0x0E; i++)
108 cksum ^= *ptr++;
109
110 return cksum;
111 }
112
113 /* Create a local IDPROM copy, verify integrity, and display information. */
114 void __init idprom_init(void)
115 {
116 prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));
117
118 idprom = &idprom_buffer;
119
120 if (idprom->id_format != 0x01) {
121 prom_printf("IDPROM: Unknown format type!\n");
122 prom_halt();
123 }
124
125 if (idprom->id_cksum != calc_idprom_cksum(idprom)) {
126 prom_printf("IDPROM: Checksum failure (nvram=%x, calc=%x)!\n",
127 idprom->id_cksum, calc_idprom_cksum(idprom));
128 prom_halt();
129 }
130
131 display_system_type(idprom->id_machtype);
132
133 pr_info("Ethernet address: %pM\n", idprom->id_ethaddr);
134 }
135
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