Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / pcmcia / rsrc_iodyn.c

diff --git a/kernel/drivers/pcmcia/rsrc_iodyn.c b/kernel/drivers/pcmcia/rsrc_iodyn.c
new file mode 100644 (file)
index 0000000..f53c237
--- /dev/null
+++ b/kernel/drivers/pcmcia/rsrc_iodyn.c
@@ -0,0 +1,171 @@
+/*
+ * rsrc_iodyn.c -- Resource management routines for MEM-static sockets.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * The initial developer of the original code is David A. Hinds
+ * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
+ * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
+ *
+ * (C) 1999            David A. Hinds
+ */
+
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+
+#include <pcmcia/ss.h>
+#include <pcmcia/cistpl.h>
+#include "cs_internal.h"
+
+
+struct pcmcia_align_data {
+       unsigned long   mask;
+       unsigned long   offset;
+};
+
+static resource_size_t pcmcia_align(void *align_data,
+                               const struct resource *res,
+                               resource_size_t size, resource_size_t align)
+{
+       struct pcmcia_align_data *data = align_data;
+       resource_size_t start;
+
+       start = (res->start & ~data->mask) + data->offset;
+       if (start < res->start)
+               start += data->mask + 1;
+
+#ifdef CONFIG_X86
+       if (res->flags & IORESOURCE_IO) {
+               if (start & 0x300)
+                       start = (start + 0x3ff) & ~0x3ff;
+       }
+#endif
+
+#ifdef CONFIG_M68K
+       if (res->flags & IORESOURCE_IO) {
+               if ((res->start + size - 1) >= 1024)
+                       start = res->end;
+       }
+#endif
+
+       return start;
+}
+
+
+static struct resource *__iodyn_find_io_region(struct pcmcia_socket *s,
+                                       unsigned long base, int num,
+                                       unsigned long align)
+{
+       struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_IO,
+                                               dev_name(&s->dev));
+       struct pcmcia_align_data data;
+       unsigned long min = base;
+       int ret;
+
+       data.mask = align - 1;
+       data.offset = base & data.mask;
+
+#ifdef CONFIG_PCI
+       if (s->cb_dev) {
+               ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
+                                            min, 0, pcmcia_align, &data);
+       } else
+#endif
+               ret = allocate_resource(&ioport_resource, res, num, min, ~0UL,
+                                       1, pcmcia_align, &data);
+
+       if (ret != 0) {
+               kfree(res);
+               res = NULL;
+       }
+       return res;
+}
+
+static int iodyn_find_io(struct pcmcia_socket *s, unsigned int attr,
+                       unsigned int *base, unsigned int num,
+                       unsigned int align, struct resource **parent)
+{
+       int i, ret = 0;
+
+       /* Check for an already-allocated window that must conflict with
+        * what was asked for.  It is a hack because it does not catch all
+        * potential conflicts, just the most obvious ones.
+        */
+       for (i = 0; i < MAX_IO_WIN; i++) {
+               if (!s->io[i].res)
+                       continue;
+
+               if (!*base)
+                       continue;
+
+               if ((s->io[i].res->start & (align-1)) == *base)
+                       return -EBUSY;
+       }
+
+       for (i = 0; i < MAX_IO_WIN; i++) {
+               struct resource *res = s->io[i].res;
+               unsigned int try;
+
+               if (res && (res->flags & IORESOURCE_BITS) !=
+                       (attr & IORESOURCE_BITS))
+                       continue;
+
+               if (!res) {
+                       if (align == 0)
+                               align = 0x10000;
+
+                       res = s->io[i].res = __iodyn_find_io_region(s, *base,
+                                                               num, align);
+                       if (!res)
+                               return -EINVAL;
+
+                       *base = res->start;
+                       s->io[i].res->flags =
+                               ((res->flags & ~IORESOURCE_BITS) |
+                                       (attr & IORESOURCE_BITS));
+                       s->io[i].InUse = num;
+                       *parent = res;
+                       return 0;
+               }
+
+               /* Try to extend top of window */
+               try = res->end + 1;
+               if ((*base == 0) || (*base == try)) {
+                       if (adjust_resource(s->io[i].res, res->start,
+                                           resource_size(res) + num))
+                               continue;
+                       *base = try;
+                       s->io[i].InUse += num;
+                       *parent = res;
+                       return 0;
+               }
+
+               /* Try to extend bottom of window */
+               try = res->start - num;
+               if ((*base == 0) || (*base == try)) {
+                       if (adjust_resource(s->io[i].res,
+                                           res->start - num,
+                                           resource_size(res) + num))
+                               continue;
+                       *base = try;
+                       s->io[i].InUse += num;
+                       *parent = res;
+                       return 0;
+               }
+       }
+
+       return -EINVAL;
+}
+
+
+struct pccard_resource_ops pccard_iodyn_ops = {
+       .validate_mem = NULL,
+       .find_io = iodyn_find_io,
+       .find_mem = NULL,
+       .init = static_init,
+       .exit = NULL,
+};
+EXPORT_SYMBOL(pccard_iodyn_ops);