Initial revision

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__ */