/* * 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> 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__ */