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