1 files changed, 172 insertions, 0 deletions

diff --git a/drivers/pcmcia/rsrc_iodyn.c b/drivers/pcmcia/rsrc_iodyn.c
new file mode 100644
index 000000000000..d0bf35021065
--- /dev/null
+++ b/drivers/pcmcia/rsrc_iodyn.c
@@ -0,0 +1,172 @@
+/*
+ * 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/cs_types.h>
+#include <pcmcia/ss.h>
+#include <pcmcia/cs.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)
+{
+        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;
+                        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,
+                                        res->end - res->start + num + 1))
+                                continue;
+                        *base = try;
+                        s->io[i].InUse += num;
+                        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,
+                                        res->end - res->start + num + 1))
+                                continue;
+                        *base = try;
+                        s->io[i].InUse += num;
+                        return 0;
+                }
+        }
+
+        return -EINVAL;
+}
+
+
+struct pccard_resource_ops pccard_iodyn_ops = {
+        .validate_mem = NULL,
+        .find_io = iodyn_find_io,
+        .find_mem = NULL,
+        .add_io = NULL,
+        .add_mem = NULL,
+        .init = static_init,
+        .exit = NULL,
+};
+EXPORT_SYMBOL(pccard_iodyn_ops);