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(machtype: idprom->id_machtype); |
132 | |
133 | pr_info("Ethernet address: %pM\n" , idprom->id_ethaddr); |
134 | } |
135 | |