diff options
Diffstat (limited to 'contrib/3c90xutil/cromutil.c')
-rw-r--r-- | contrib/3c90xutil/cromutil.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/contrib/3c90xutil/cromutil.c b/contrib/3c90xutil/cromutil.c new file mode 100644 index 0000000..d4751fb --- /dev/null +++ b/contrib/3c90xutil/cromutil.c @@ -0,0 +1,103 @@ +/* + * 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__ */ |