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/*
* 3c905cutil.c - perform various control ops on the 3C905C bios rom
* which we assume to be an AT49BV512
*
*/
#ifndef __i386__
# error "This program can't compile or run on non-intel computers"
#else
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/io.h>
#include <string.h>
int main(int argc, char **argv)
{
unsigned int ioaddr, i, n;
unsigned char b;
setuid(0); /* if we're setuid, do it really */
if (argc != 3) {
printf("Usage: romid ioaddr [erase|id|read >file|prog <file]\n");
exit(-1);
}
if (iopl(3)) {
perror("iopl()");
exit(1);
}
sscanf(argv[1],"%x",&ioaddr);
/* Set the register window to 0 for the 3C905C */
outw(0x800, ioaddr+0xe);
if (strcmp(argv[2], "erase") == 0) {
/* do the funky chicken to erase the rom contents */
outl(0x5555, ioaddr+0x4);
outb(0xaa, ioaddr+0x8);
outl(0x2aaa, ioaddr+0x4);
outb(0x55, ioaddr+0x8);
outl(0x5555, ioaddr+0x4);
outb(0x80, ioaddr+0x8);
outl(0x5555, ioaddr+0x4);
outb(0xaa, ioaddr+0x8);
outl(0x2aaa, ioaddr+0x4);
outb(0x55, ioaddr+0x8);
outl(0x5555, ioaddr+0x4);
outb(0x10, ioaddr+0x8);
sleep (1);
printf("Bios ROM at %04x has been erased\n", ioaddr);
} else if (strcmp(argv[2], "id") == 0) {
outl(0x5555, ioaddr+0x4);
outb(0xaa, ioaddr+0x8);
outl(0x2aaa, ioaddr+0x4);
outb(0x55, ioaddr+0x8);
outl(0x5555, ioaddr+0x4);
outb(0x90, ioaddr+0x8);
/* 10ms delay needed */
printf("Manufacturer ID - ");
/* manuf. id */
outl(0x0000, ioaddr+0x4);
printf("%02x\n", inb(ioaddr+0x8));
/* device id */
outl(0x0001, ioaddr+0x4);
printf("Device ID - %02x\n", inb(ioaddr+0x8));
/* undo the funky chicken */
outl(0x5555, ioaddr+0x4);
outb(0xaa, ioaddr+0x8);
outl(0x2aaa, ioaddr+0x4);
outb(0x55, ioaddr+0x8);
outl(0x5555, ioaddr+0x4);
outb(0xf0, ioaddr+0x8);
} else if (strcmp(argv[2], "read") == 0) {
for (i = 0; i < 65536; i++) {
outl(i, ioaddr+0x4);
b = inb(ioaddr+0x8);
write(1, &b, 1);
}
} else if (strcmp(argv[2], "prog") == 0) {
for (i = 0; i < 65536; i++) {
n = read(0, &b, 1);
if (n == 0)
break;
if (n < 0) {
perror("File Error");
exit(-3);
}
outl(0x5555, ioaddr+0x4);
outb(0xaa, ioaddr+0x8);
outl(0x2aaa, ioaddr+0x4);
outb(0x55, ioaddr+0x8);
outl(0x5555, ioaddr+0x4);
outb(0xA0, ioaddr+0x8);
outl(i, ioaddr+0x4);
outb(b, ioaddr+0x8);
while (inb(ioaddr+0x8) != b)
;
}
}
return 0;
}
#endif /* __i386__ */
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