+static const struct io_region {
+ int offset;
+ int size;
+} io_regions[] = {
+ { 2, 1 },
+ /* address + 3 is sometimes reserved by pnp bios for motherboard */
+ { 4, 2 },
+ /* address + 6 is reserved, and may be taken by IDE.
+ * Unfortunately, Adaptec doesn't know this :-(, */
+ { 7, 1 },
+};
+
+static void floppy_release_allocated_regions(int fdc, const struct io_region *p)
+{
+ while (p != io_regions) {
+ p--;
+ release_region(FDCS->address + p->offset, p->size);
+ }
+}
+
+#define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)]))
+
+static int floppy_request_regions(int fdc)
+{
+ const struct io_region *p;
+
+ for (p = io_regions; p < ARRAY_END(io_regions); p++) {
+ if (!request_region(FDCS->address + p->offset, p->size, "floppy")) {
+ DPRINT("Floppy io-port 0x%04lx in use\n", FDCS->address + p->offset);
+ floppy_release_allocated_regions(fdc, p);
+ return -EBUSY;
+ }
+ }
+ return 0;
+}
+
+static void floppy_release_regions(int fdc)
+{
+ floppy_release_allocated_regions(fdc, ARRAY_END(io_regions));
+}
+