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// SPDX-License-Identifier: GPL-2.0
/*
* idprom.c: Routines to load the idprom into kernel addresses and
* interpret the data contained within.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
* Sun3/3x models added by David Monro (davidm@psrg.cs.usyd.edu.au)
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/string.h>
#include <asm/oplib.h>
#include <asm/idprom.h>
#include <asm/machines.h> /* Fun with Sun released architectures. */
#include "sun3.h"
struct idprom *idprom;
EXPORT_SYMBOL(idprom);
static struct idprom idprom_buffer;
/* Here is the master table of Sun machines which use some implementation
* of the Sparc CPU and have a meaningful IDPROM machtype value that we
* know about. See asm-sparc/machines.h for empirical constants.
*/
static struct Sun_Machine_Models Sun_Machines[NUM_SUN_MACHINES] = {
/* First, Sun3's */
{ .name = "Sun 3/160 Series", .id_machtype = (SM_SUN3 | SM_3_160) },
{ .name = "Sun 3/50", .id_machtype = (SM_SUN3 | SM_3_50) },
{ .name = "Sun 3/260 Series", .id_machtype = (SM_SUN3 | SM_3_260) },
{ .name = "Sun 3/110 Series", .id_machtype = (SM_SUN3 | SM_3_110) },
{ .name = "Sun 3/60", .id_machtype = (SM_SUN3 | SM_3_60) },
{ .name = "Sun 3/E", .id_machtype = (SM_SUN3 | SM_3_E) },
/* Now, Sun3x's */
{ .name = "Sun 3/460 Series", .id_machtype = (SM_SUN3X | SM_3_460) },
{ .name = "Sun 3/80", .id_machtype = (SM_SUN3X | SM_3_80) },
/* Then, Sun4's */
// { .name = "Sun 4/100 Series", .id_machtype = (SM_SUN4 | SM_4_110) },
// { .name = "Sun 4/200 Series", .id_machtype = (SM_SUN4 | SM_4_260) },
// { .name = "Sun 4/300 Series", .id_machtype = (SM_SUN4 | SM_4_330) },
// { .name = "Sun 4/400 Series", .id_machtype = (SM_SUN4 | SM_4_470) },
/* And now, Sun4c's */
// { .name = "Sun4c SparcStation 1", .id_machtype = (SM_SUN4C | SM_4C_SS1) },
// { .name = "Sun4c SparcStation IPC", .id_machtype = (SM_SUN4C | SM_4C_IPC) },
// { .name = "Sun4c SparcStation 1+", .id_machtype = (SM_SUN4C | SM_4C_SS1PLUS) },
// { .name = "Sun4c SparcStation SLC", .id_machtype = (SM_SUN4C | SM_4C_SLC) },
// { .name = "Sun4c SparcStation 2", .id_machtype = (SM_SUN4C | SM_4C_SS2) },
// { .name = "Sun4c SparcStation ELC", .id_machtype = (SM_SUN4C | SM_4C_ELC) },
// { .name = "Sun4c SparcStation IPX", .id_machtype = (SM_SUN4C | SM_4C_IPX) },
/* Finally, early Sun4m's */
// { .name = "Sun4m SparcSystem600", .id_machtype = (SM_SUN4M | SM_4M_SS60) },
// { .name = "Sun4m SparcStation10/20", .id_machtype = (SM_SUN4M | SM_4M_SS50) },
// { .name = "Sun4m SparcStation5", .id_machtype = (SM_SUN4M | SM_4M_SS40) },
/* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */
// { .name = "Sun4M OBP based system", .id_machtype = (SM_SUN4M_OBP | 0x0) }
};
static void __init display_system_type(unsigned char machtype)
{
register int i;
for (i = 0; i < NUM_SUN_MACHINES; i++) {
if(Sun_Machines[i].id_machtype == machtype) {
if (machtype != (SM_SUN4M_OBP | 0x00))
pr_info("TYPE: %s\n", Sun_Machines[i].name);
else {
#if 0
char sysname[128];
prom_getproperty(prom_root_node, "banner-name",
sysname, sizeof(sysname));
pr_info("TYPE: %s\n", sysname);
#endif
}
return;
}
}
prom_printf("IDPROM: Bogus id_machtype value, 0x%x\n", machtype);
prom_halt();
}
void sun3_get_model(char *model)
{
register int i;
for (i = 0; i < NUM_SUN_MACHINES; i++) {
if(Sun_Machines[i].id_machtype == idprom->id_machtype) {
strcpy(model, Sun_Machines[i].name);
return;
}
}
}
/* Calculate the IDPROM checksum (xor of the data bytes). */
static unsigned char __init calc_idprom_cksum(struct idprom *idprom)
{
unsigned char cksum, i, *ptr = (unsigned char *)idprom;
for (i = cksum = 0; i <= 0x0E; i++)
cksum ^= *ptr++;
return cksum;
}
/* Create a local IDPROM copy, verify integrity, and display information. */
void __init idprom_init(void)
{
prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));
idprom = &idprom_buffer;
if (idprom->id_format != 0x01) {
prom_printf("IDPROM: Unknown format type!\n");
prom_halt();
}
if (idprom->id_cksum != calc_idprom_cksum(idprom)) {
prom_printf("IDPROM: Checksum failure (nvram=%x, calc=%x)!\n",
idprom->id_cksum, calc_idprom_cksum(idprom));
prom_halt();
}
display_system_type(idprom->id_machtype);
pr_info("Ethernet address: %pM\n", idprom->id_ethaddr);
}
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