1 files changed, 985 insertions, 0 deletions

diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c
new file mode 100644
index 000000000000..5876bab7c14c
--- /dev/null
+++ b/drivers/pcmcia/rsrc_nonstatic.c
@@ -0,0 +1,985 @@
+/*
+ * rsrc_nonstatic.c -- Resource management routines for !SS_CAP_STATIC_MAP 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/config.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/timer.h>
+#include <linux/pci.h>
+#include <linux/device.h>
+
+#include <asm/irq.h>
+#include <asm/io.h>
+
+#include <pcmcia/cs_types.h>
+#include <pcmcia/ss.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/bulkmem.h>
+#include <pcmcia/cistpl.h>
+#include "cs_internal.h"
+
+MODULE_AUTHOR("David A. Hinds, Dominik Brodowski");
+MODULE_LICENSE("GPL");
+
+/* Parameters that can be set with 'insmod' */
+
+#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
+
+INT_MODULE_PARM(probe_mem,      1);             /* memory probe? */
+#ifdef CONFIG_PCMCIA_PROBE
+INT_MODULE_PARM(probe_io,       1);             /* IO port probe? */
+INT_MODULE_PARM(mem_limit,      0x10000);
+#endif
+
+/* for io_db and mem_db */
+struct resource_map {
+        u_long                  base, num;
+        struct resource_map     *next;
+};
+
+struct socket_data {
+        struct resource_map             mem_db;
+        struct resource_map             io_db;
+        unsigned int                    rsrc_mem_probe;
+};
+
+static DECLARE_MUTEX(rsrc_sem);
+#define MEM_PROBE_LOW   (1 << 0)
+#define MEM_PROBE_HIGH  (1 << 1)
+
+
+/*======================================================================
+
+    Linux resource management extensions
+
+======================================================================*/
+
+static struct resource *
+make_resource(unsigned long b, unsigned long n, int flags, char *name)
+{
+        struct resource *res = kmalloc(sizeof(*res), GFP_KERNEL);
+
+        if (res) {
+                memset(res, 0, sizeof(*res));
+                res->name = name;
+                res->start = b;
+                res->end = b + n - 1;
+                res->flags = flags;
+        }
+        return res;
+}
+
+static struct resource *
+claim_region(struct pcmcia_socket *s, unsigned long base, unsigned long size,
+             int type, char *name)
+{
+        struct resource *res, *parent;
+
+        parent = type & IORESOURCE_MEM ? &iomem_resource : &ioport_resource;
+        res = make_resource(base, size, type | IORESOURCE_BUSY, name);
+
+        if (res) {
+#ifdef CONFIG_PCI
+                if (s && s->cb_dev)
+                        parent = pci_find_parent_resource(s->cb_dev, res);
+#endif
+                if (!parent || request_resource(parent, res)) {
+                        kfree(res);
+                        res = NULL;
+                }
+        }
+        return res;
+}
+
+static void free_region(struct resource *res)
+{
+        if (res) {
+                release_resource(res);
+                kfree(res);
+        }
+}
+
+/*======================================================================
+
+    These manage the internal databases of available resources.
+
+======================================================================*/
+
+static int add_interval(struct resource_map *map, u_long base, u_long num)
+{
+    struct resource_map *p, *q;
+
+    for (p = map; ; p = p->next) {
+        if ((p != map) && (p->base+p->num-1 >= base))
+            return -1;
+        if ((p->next == map) || (p->next->base > base+num-1))
+            break;
+    }
+    q = kmalloc(sizeof(struct resource_map), GFP_KERNEL);
+    if (!q) return CS_OUT_OF_RESOURCE;
+    q->base = base; q->num = num;
+    q->next = p->next; p->next = q;
+    return CS_SUCCESS;
+}
+
+/*====================================================================*/
+
+static int sub_interval(struct resource_map *map, u_long base, u_long num)
+{
+    struct resource_map *p, *q;
+
+    for (p = map; ; p = q) {
+        q = p->next;
+        if (q == map)
+            break;
+        if ((q->base+q->num > base) && (base+num > q->base)) {
+            if (q->base >= base) {
+                if (q->base+q->num <= base+num) {
+                    /* Delete whole block */
+                    p->next = q->next;
+                    kfree(q);
+                    /* don't advance the pointer yet */
+                    q = p;
+                } else {
+                    /* Cut off bit from the front */
+                    q->num = q->base + q->num - base - num;
+                    q->base = base + num;
+                }
+            } else if (q->base+q->num <= base+num) {
+                /* Cut off bit from the end */
+                q->num = base - q->base;
+            } else {
+                /* Split the block into two pieces */
+                p = kmalloc(sizeof(struct resource_map), GFP_KERNEL);
+                if (!p) return CS_OUT_OF_RESOURCE;
+                p->base = base+num;
+                p->num = q->base+q->num - p->base;
+                q->num = base - q->base;
+                p->next = q->next ; q->next = p;
+            }
+        }
+    }
+    return CS_SUCCESS;
+}
+
+/*======================================================================
+
+    These routines examine a region of IO or memory addresses to
+    determine what ranges might be genuinely available.
+
+======================================================================*/
+
+#ifdef CONFIG_PCMCIA_PROBE
+static void do_io_probe(struct pcmcia_socket *s, kio_addr_t base, kio_addr_t num)
+{
+    struct resource *res;
+    struct socket_data *s_data = s->resource_data;
+    kio_addr_t i, j, bad;
+    int any;
+    u_char *b, hole, most;
+
+    printk(KERN_INFO "cs: IO port probe %#lx-%#lx:",
+           base, base+num-1);
+
+    /* First, what does a floating port look like? */
+    b = kmalloc(256, GFP_KERNEL);
+    if (!b) {
+            printk(KERN_ERR "do_io_probe: unable to kmalloc 256 bytes");
+            return;
+    }
+    memset(b, 0, 256);
+    for (i = base, most = 0; i < base+num; i += 8) {
+        res = claim_region(NULL, i, 8, IORESOURCE_IO, "PCMCIA IO probe");
+        if (!res)
+            continue;
+        hole = inb(i);
+        for (j = 1; j < 8; j++)
+            if (inb(i+j) != hole) break;
+        free_region(res);
+        if ((j == 8) && (++b[hole] > b[most]))
+            most = hole;
+        if (b[most] == 127) break;
+    }
+    kfree(b);
+
+    bad = any = 0;
+    for (i = base; i < base+num; i += 8) {
+        res = claim_region(NULL, i, 8, IORESOURCE_IO, "PCMCIA IO probe");
+        if (!res)
+            continue;
+        for (j = 0; j < 8; j++)
+            if (inb(i+j) != most) break;
+        free_region(res);
+        if (j < 8) {
+            if (!any)
+                printk(" excluding");
+            if (!bad)
+                bad = any = i;
+        } else {
+            if (bad) {
+                sub_interval(&s_data->io_db, bad, i-bad);
+                printk(" %#lx-%#lx", bad, i-1);
+                bad = 0;
+            }
+        }
+    }
+    if (bad) {
+        if ((num > 16) && (bad == base) && (i == base+num)) {
+            printk(" nothing: probe failed.\n");
+            return;
+        } else {
+            sub_interval(&s_data->io_db, bad, i-bad);
+            printk(" %#lx-%#lx", bad, i-1);
+        }
+    }
+
+    printk(any ? "\n" : " clean.\n");
+}
+#endif
+
+/*======================================================================
+
+    This is tricky... when we set up CIS memory, we try to validate
+    the memory window space allocations.
+
+======================================================================*/
+
+/* Validation function for cards with a valid CIS */
+static int readable(struct pcmcia_socket *s, struct resource *res, cisinfo_t *info)
+{
+        int ret = -1;
+
+        s->cis_mem.res = res;
+        s->cis_virt = ioremap(res->start, s->map_size);
+        if (s->cis_virt) {
+                ret = pccard_validate_cis(s, BIND_FN_ALL, info);
+                /* invalidate mapping and CIS cache */
+                iounmap(s->cis_virt);
+                s->cis_virt = NULL;
+                destroy_cis_cache(s);
+        }
+        s->cis_mem.res = NULL;
+        if ((ret != 0) || (info->Chains == 0))
+                return 0;
+        return 1;
+}
+
+/* Validation function for simple memory cards */
+static int checksum(struct pcmcia_socket *s, struct resource *res)
+{
+        pccard_mem_map map;
+        int i, a = 0, b = -1, d;
+        void __iomem *virt;
+
+        virt = ioremap(res->start, s->map_size);
+        if (virt) {
+                map.map = 0;
+                map.flags = MAP_ACTIVE;
+                map.speed = 0;
+                map.res = res;
+                map.card_start = 0;
+                s->ops->set_mem_map(s, &map);
+
+                /* Don't bother checking every word... */
+                for (i = 0; i < s->map_size; i += 44) {
+                        d = readl(virt+i);
+                        a += d;
+                        b &= d;
+                }
+
+                map.flags = 0;
+                s->ops->set_mem_map(s, &map);
+
+                iounmap(virt);
+        }
+
+        return (b == -1) ? -1 : (a>>1);
+}
+
+static int
+cis_readable(struct pcmcia_socket *s, unsigned long base, unsigned long size)
+{
+        struct resource *res1, *res2;
+        cisinfo_t info1, info2;
+        int ret = 0;
+
+        res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "cs memory probe");
+        res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM, "cs memory probe");
+
+        if (res1 && res2) {
+                ret = readable(s, res1, &info1);
+                ret += readable(s, res2, &info2);
+        }
+
+        free_region(res2);
+        free_region(res1);
+
+        return (ret == 2) && (info1.Chains == info2.Chains);
+}
+
+static int
+checksum_match(struct pcmcia_socket *s, unsigned long base, unsigned long size)
+{
+        struct resource *res1, *res2;
+        int a = -1, b = -1;
+
+        res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "cs memory probe");
+        res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM, "cs memory probe");
+
+        if (res1 && res2) {
+                a = checksum(s, res1);
+                b = checksum(s, res2);
+        }
+
+        free_region(res2);
+        free_region(res1);
+
+        return (a == b) && (a >= 0);
+}
+
+/*======================================================================
+
+    The memory probe.  If the memory list includes a 64K-aligned block
+    below 1MB, we probe in 64K chunks, and as soon as we accumulate at
+    least mem_limit free space, we quit.
+
+======================================================================*/
+
+static int do_mem_probe(u_long base, u_long num, struct pcmcia_socket *s)
+{
+    struct socket_data *s_data = s->resource_data;
+    u_long i, j, bad, fail, step;
+
+    printk(KERN_INFO "cs: memory probe 0x%06lx-0x%06lx:",
+           base, base+num-1);
+    bad = fail = 0;
+    step = (num < 0x20000) ? 0x2000 : ((num>>4) & ~0x1fff);
+    /* cis_readable wants to map 2x map_size */
+    if (step < 2 * s->map_size)
+        step = 2 * s->map_size;
+    for (i = j = base; i < base+num; i = j + step) {
+        if (!fail) {
+            for (j = i; j < base+num; j += step) {
+                if (cis_readable(s, j, step))
+                    break;
+            }
+            fail = ((i == base) && (j == base+num));
+        }
+        if (fail) {
+            for (j = i; j < base+num; j += 2*step)
+                if (checksum_match(s, j, step) &&
+                    checksum_match(s, j + step, step))
+                    break;
+        }
+        if (i != j) {
+            if (!bad) printk(" excluding");
+            printk(" %#05lx-%#05lx", i, j-1);
+            sub_interval(&s_data->mem_db, i, j-i);
+            bad += j-i;
+        }
+    }
+    printk(bad ? "\n" : " clean.\n");
+    return (num - bad);
+}
+
+#ifdef CONFIG_PCMCIA_PROBE
+
+static u_long inv_probe(struct resource_map *m, struct pcmcia_socket *s)
+{
+    struct socket_data *s_data = s->resource_data;
+    u_long ok;
+    if (m == &s_data->mem_db)
+        return 0;
+    ok = inv_probe(m->next, s);
+    if (ok) {
+        if (m->base >= 0x100000)
+            sub_interval(&s_data->mem_db, m->base, m->num);
+        return ok;
+    }
+    if (m->base < 0x100000)
+        return 0;
+    return do_mem_probe(m->base, m->num, s);
+}
+
+static void validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
+{
+    struct resource_map *m, mm;
+    static u_char order[] = { 0xd0, 0xe0, 0xc0, 0xf0 };
+    u_long b, i, ok = 0;
+    struct socket_data *s_data = s->resource_data;
+
+    /* We do up to four passes through the list */
+    if (probe_mask & MEM_PROBE_HIGH) {
+        if (inv_probe(s_data->mem_db.next, s) > 0)
+            return;
+        printk(KERN_NOTICE "cs: warning: no high memory space "
+               "available!\n");
+    }
+    if ((probe_mask & MEM_PROBE_LOW) == 0)
+        return;
+    for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) {
+        mm = *m;
+        /* Only probe < 1 MB */
+        if (mm.base >= 0x100000) continue;
+        if ((mm.base | mm.num) & 0xffff) {
+            ok += do_mem_probe(mm.base, mm.num, s);
+            continue;
+        }
+        /* Special probe for 64K-aligned block */
+        for (i = 0; i < 4; i++) {
+            b = order[i] << 12;
+            if ((b >= mm.base) && (b+0x10000 <= mm.base+mm.num)) {
+                if (ok >= mem_limit)
+                    sub_interval(&s_data->mem_db, b, 0x10000);
+                else
+                    ok += do_mem_probe(b, 0x10000, s);
+            }
+        }
+    }
+}
+
+#else /* CONFIG_PCMCIA_PROBE */
+
+static void validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
+{
+        struct resource_map *m, mm;
+        struct socket_data *s_data = s->resource_data;
+
+        for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) {
+                mm = *m;
+                if (do_mem_probe(mm.base, mm.num, s))
+                        break;
+        }
+}
+
+#endif /* CONFIG_PCMCIA_PROBE */
+
+
+/*
+ * Locking note: Must be called with skt_sem held!
+ */
+static void pcmcia_nonstatic_validate_mem(struct pcmcia_socket *s)
+{
+        struct socket_data *s_data = s->resource_data;
+        if (probe_mem) {
+                unsigned int probe_mask;
+
+                down(&rsrc_sem);
+
+                probe_mask = MEM_PROBE_LOW;
+                if (s->features & SS_CAP_PAGE_REGS)
+                        probe_mask = MEM_PROBE_HIGH;
+
+                if (probe_mask & ~s_data->rsrc_mem_probe) {
+                        s_data->rsrc_mem_probe |= probe_mask;
+
+                        if (s->state & SOCKET_PRESENT)
+                                validate_mem(s, probe_mask);
+                }
+
+                up(&rsrc_sem);
+        }
+}
+
+struct pcmcia_align_data {
+        unsigned long   mask;
+        unsigned long   offset;
+        struct resource_map     *map;
+};
+
+static void
+pcmcia_common_align(void *align_data, struct resource *res,
+                    unsigned long size, unsigned long align)
+{
+        struct pcmcia_align_data *data = align_data;
+        unsigned long start;
+        /*
+         * Ensure that we have the correct start address
+         */
+        start = (res->start & ~data->mask) + data->offset;
+        if (start < res->start)
+                start += data->mask + 1;
+        res->start = start;
+}
+
+static void
+pcmcia_align(void *align_data, struct resource *res,
+             unsigned long size, unsigned long align)
+{
+        struct pcmcia_align_data *data = align_data;
+        struct resource_map *m;
+
+        pcmcia_common_align(data, res, size, align);
+
+        for (m = data->map->next; m != data->map; m = m->next) {
+                unsigned long start = m->base;
+                unsigned long end = m->base + m->num - 1;
+
+                /*
+                 * If the lower resources are not available, try aligning
+                 * to this entry of the resource database to see if it'll
+                 * fit here.
+                 */
+                if (res->start < start) {
+                        res->start = start;
+                        pcmcia_common_align(data, res, size, align);
+                }
+
+                /*
+                 * If we're above the area which was passed in, there's
+                 * no point proceeding.
+                 */
+                if (res->start >= res->end)
+                        break;
+
+                if ((res->start + size - 1) <= end)
+                        break;
+        }
+
+        /*
+         * If we failed to find something suitable, ensure we fail.
+         */
+        if (m == data->map)
+                res->start = res->end;
+}
+
+/*
+ * Adjust an existing IO region allocation, but making sure that we don't
+ * encroach outside the resources which the user supplied.
+ */
+static int nonstatic_adjust_io_region(struct resource *res, unsigned long r_start,
+                                      unsigned long r_end, struct pcmcia_socket *s)
+{
+        struct resource_map *m;
+        struct socket_data *s_data = s->resource_data;
+        int ret = -ENOMEM;
+
+        down(&rsrc_sem);
+        for (m = s_data->io_db.next; m != &s_data->io_db; m = m->next) {
+                unsigned long start = m->base;
+                unsigned long end = m->base + m->num - 1;
+
+                if (start > r_start || r_end > end)
+                        continue;
+
+                ret = adjust_resource(res, r_start, r_end - r_start + 1);
+                break;
+        }
+        up(&rsrc_sem);
+
+        return ret;
+}
+
+/*======================================================================
+
+    These find ranges of I/O ports or memory addresses that are not
+    currently allocated by other devices.
+
+    The 'align' field should reflect the number of bits of address
+    that need to be preserved from the initial value of *base.  It
+    should be a power of two, greater than or equal to 'num'.  A value
+    of 0 means that all bits of *base are significant.  *base should
+    also be strictly less than 'align'.
+
+======================================================================*/
+
+struct resource *nonstatic_find_io_region(unsigned long base, int num,
+                   unsigned long align, struct pcmcia_socket *s)
+{
+        struct resource *res = make_resource(0, num, IORESOURCE_IO, s->dev.class_id);
+        struct socket_data *s_data = s->resource_data;
+        struct pcmcia_align_data data;
+        unsigned long min = base;
+        int ret;
+
+        if (align == 0)
+                align = 0x10000;
+
+        data.mask = align - 1;
+        data.offset = base & data.mask;
+        data.map = &s_data->io_db;
+
+        down(&rsrc_sem);
+#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);
+        up(&rsrc_sem);
+
+        if (ret != 0) {
+                kfree(res);
+                res = NULL;
+        }
+        return res;
+}
+
+struct resource * nonstatic_find_mem_region(u_long base, u_long num, u_long align,
+                                 int low, struct pcmcia_socket *s)
+{
+        struct resource *res = make_resource(0, num, IORESOURCE_MEM, s->dev.class_id);
+        struct socket_data *s_data = s->resource_data;
+        struct pcmcia_align_data data;
+        unsigned long min, max;
+        int ret, i;
+
+        low = low || !(s->features & SS_CAP_PAGE_REGS);
+
+        data.mask = align - 1;
+        data.offset = base & data.mask;
+        data.map = &s_data->mem_db;
+
+        for (i = 0; i < 2; i++) {
+                if (low) {
+                        max = 0x100000UL;
+                        min = base < max ? base : 0;
+                } else {
+                        max = ~0UL;
+                        min = 0x100000UL + base;
+                }
+
+                down(&rsrc_sem);
+#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(&iomem_resource, res, num, min,
+                                                max, 1, pcmcia_align, &data);
+                up(&rsrc_sem);
+                if (ret == 0 || low)
+                        break;
+                low = 1;
+        }
+
+        if (ret != 0) {
+                kfree(res);
+                res = NULL;
+        }
+        return res;
+}
+
+
+static int adjust_memory(struct pcmcia_socket *s, adjust_t *adj)
+{
+        u_long base, num;
+        struct socket_data *data = s->resource_data;
+        int ret;
+
+        base = adj->resource.memory.Base;
+        num = adj->resource.memory.Size;
+        if ((num == 0) || (base+num-1 < base))
+                return CS_BAD_SIZE;
+
+        ret = CS_SUCCESS;
+
+        down(&rsrc_sem);
+        switch (adj->Action) {
+        case ADD_MANAGED_RESOURCE:
+                ret = add_interval(&data->mem_db, base, num);
+                break;
+        case REMOVE_MANAGED_RESOURCE:
+                ret = sub_interval(&data->mem_db, base, num);
+                if (ret == CS_SUCCESS) {
+                        struct pcmcia_socket *socket;
+                        down_read(&pcmcia_socket_list_rwsem);
+                        list_for_each_entry(socket, &pcmcia_socket_list, socket_list)
+                                release_cis_mem(socket);
+                        up_read(&pcmcia_socket_list_rwsem);
+                }
+                break;
+        default:
+                ret = CS_UNSUPPORTED_FUNCTION;
+        }
+        up(&rsrc_sem);
+
+        return ret;
+}
+
+
+static int adjust_io(struct pcmcia_socket *s, adjust_t *adj)
+{
+        struct socket_data *data = s->resource_data;
+        kio_addr_t base, num;
+        int ret = CS_SUCCESS;
+
+        base = adj->resource.io.BasePort;
+        num = adj->resource.io.NumPorts;
+        if ((base < 0) || (base > 0xffff))
+                return CS_BAD_BASE;
+        if ((num <= 0) || (base+num > 0x10000) || (base+num <= base))
+                return CS_BAD_SIZE;
+
+        down(&rsrc_sem);
+        switch (adj->Action) {
+        case ADD_MANAGED_RESOURCE:
+                if (add_interval(&data->io_db, base, num) != 0) {
+                        ret = CS_IN_USE;
+                        break;
+                }
+#ifdef CONFIG_PCMCIA_PROBE
+                if (probe_io)
+                        do_io_probe(s, base, num);
+#endif
+                break;
+        case REMOVE_MANAGED_RESOURCE:
+                sub_interval(&data->io_db, base, num);
+                break;
+        default:
+                ret = CS_UNSUPPORTED_FUNCTION;
+                break;
+        }
+        up(&rsrc_sem);
+
+        return ret;
+}
+
+
+static int nonstatic_adjust_resource_info(struct pcmcia_socket *s, adjust_t *adj)
+{
+        switch (adj->Resource) {
+        case RES_MEMORY_RANGE:
+                return adjust_memory(s, adj);
+        case RES_IO_RANGE:
+                return adjust_io(s, adj);
+        }
+        return CS_UNSUPPORTED_FUNCTION;
+}
+
+static int nonstatic_init(struct pcmcia_socket *s)
+{
+        struct socket_data *data;
+
+        data = kmalloc(sizeof(struct socket_data), GFP_KERNEL);
+        if (!data)
+                return -ENOMEM;
+        memset(data, 0, sizeof(struct socket_data));
+
+        data->mem_db.next = &data->mem_db;
+        data->io_db.next = &data->io_db;
+
+        s->resource_data = (void *) data;
+
+        return 0;
+}
+
+static void nonstatic_release_resource_db(struct pcmcia_socket *s)
+{
+        struct socket_data *data = s->resource_data;
+        struct resource_map *p, *q;
+
+        down(&rsrc_sem);
+        for (p = data->mem_db.next; p != &data->mem_db; p = q) {
+                q = p->next;
+                kfree(p);
+        }
+        for (p = data->io_db.next; p != &data->io_db; p = q) {
+                q = p->next;
+                kfree(p);
+        }
+        up(&rsrc_sem);
+}
+
+
+struct pccard_resource_ops pccard_nonstatic_ops = {
+        .validate_mem = pcmcia_nonstatic_validate_mem,
+        .adjust_io_region = nonstatic_adjust_io_region,
+        .find_io = nonstatic_find_io_region,
+        .find_mem = nonstatic_find_mem_region,
+        .adjust_resource = nonstatic_adjust_resource_info,
+        .init = nonstatic_init,
+        .exit = nonstatic_release_resource_db,
+};
+EXPORT_SYMBOL(pccard_nonstatic_ops);
+
+
+/* sysfs interface to the resource database */
+
+static ssize_t show_io_db(struct class_device *class_dev, char *buf)
+{
+        struct pcmcia_socket *s = class_get_devdata(class_dev);
+        struct socket_data *data;
+        struct resource_map *p;
+        ssize_t ret = 0;
+
+        down(&rsrc_sem);
+        data = s->resource_data;
+
+        for (p = data->io_db.next; p != &data->io_db; p = p->next) {
+                if (ret > (PAGE_SIZE - 10))
+                        continue;
+                ret += snprintf (&buf[ret], (PAGE_SIZE - ret - 1),
+                                 "0x%08lx - 0x%08lx\n",
+                                 ((unsigned long) p->base),
+                                 ((unsigned long) p->base + p->num - 1));
+        }
+
+        up(&rsrc_sem);
+        return (ret);
+}
+
+static ssize_t store_io_db(struct class_device *class_dev, const char *buf, size_t count)
+{
+        struct pcmcia_socket *s = class_get_devdata(class_dev);
+        unsigned long start_addr, end_addr;
+        unsigned int add = 1;
+        adjust_t adj;
+        ssize_t ret = 0;
+
+        ret = sscanf (buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr);
+        if (ret != 2) {
+                ret = sscanf (buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr);
+                add = 0;
+                if (ret != 2) {
+                        ret = sscanf (buf, "0x%lx - 0x%lx", &start_addr, &end_addr);
+                        add = 1;
+                        if (ret != 2)
+                                return -EINVAL;
+                }
+        }
+        if (end_addr <= start_addr)
+                return -EINVAL;
+
+        adj.Action = add ? ADD_MANAGED_RESOURCE : REMOVE_MANAGED_RESOURCE;
+        adj.Resource = RES_IO_RANGE;
+        adj.resource.io.BasePort = start_addr;
+        adj.resource.io.NumPorts = end_addr - start_addr + 1;
+
+        ret = adjust_io(s, &adj);
+
+        return ret ? ret : count;
+}
+static CLASS_DEVICE_ATTR(available_resources_io, 0600, show_io_db, store_io_db);
+
+static ssize_t show_mem_db(struct class_device *class_dev, char *buf)
+{
+        struct pcmcia_socket *s = class_get_devdata(class_dev);
+        struct socket_data *data;
+        struct resource_map *p;
+        ssize_t ret = 0;
+
+        down(&rsrc_sem);
+        data = s->resource_data;
+
+        for (p = data->mem_db.next; p != &data->mem_db; p = p->next) {
+                if (ret > (PAGE_SIZE - 10))
+                        continue;
+                ret += snprintf (&buf[ret], (PAGE_SIZE - ret - 1),
+                                 "0x%08lx - 0x%08lx\n",
+                                 ((unsigned long) p->base),
+                                 ((unsigned long) p->base + p->num - 1));
+        }
+
+        up(&rsrc_sem);
+        return (ret);
+}
+
+static ssize_t store_mem_db(struct class_device *class_dev, const char *buf, size_t count)
+{
+        struct pcmcia_socket *s = class_get_devdata(class_dev);
+        unsigned long start_addr, end_addr;
+        unsigned int add = 1;
+        adjust_t adj;
+        ssize_t ret = 0;
+
+        ret = sscanf (buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr);
+        if (ret != 2) {
+                ret = sscanf (buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr);
+                add = 0;
+                if (ret != 2) {
+                        ret = sscanf (buf, "0x%lx - 0x%lx", &start_addr, &end_addr);
+                        add = 1;
+                        if (ret != 2)
+                                return -EINVAL;
+                }
+        }
+        if (end_addr <= start_addr)
+                return -EINVAL;
+
+        adj.Action = add ? ADD_MANAGED_RESOURCE : REMOVE_MANAGED_RESOURCE;
+        adj.Resource = RES_MEMORY_RANGE;
+        adj.resource.memory.Base = start_addr;
+        adj.resource.memory.Size = end_addr - start_addr + 1;
+
+        ret = adjust_memory(s, &adj);
+
+        return ret ? ret : count;
+}
+static CLASS_DEVICE_ATTR(available_resources_mem, 0600, show_mem_db, store_mem_db);
+
+static struct class_device_attribute *pccard_rsrc_attributes[] = {
+        &class_device_attr_available_resources_io,
+        &class_device_attr_available_resources_mem,
+        NULL,
+};
+
+static int __devinit pccard_sysfs_add_rsrc(struct class_device *class_dev)
+{
+        struct pcmcia_socket *s = class_get_devdata(class_dev);
+        struct class_device_attribute **attr;
+        int ret = 0;
+        if (s->resource_ops != &pccard_nonstatic_ops)
+                return 0;
+
+        for (attr = pccard_rsrc_attributes; *attr; attr++) {
+                ret = class_device_create_file(class_dev, *attr);
+                if (ret)
+                        break;
+        }
+
+        return ret;
+}
+
+static void __devexit pccard_sysfs_remove_rsrc(struct class_device *class_dev)
+{
+        struct pcmcia_socket *s = class_get_devdata(class_dev);
+        struct class_device_attribute **attr;
+
+        if (s->resource_ops != &pccard_nonstatic_ops)
+                return;
+
+        for (attr = pccard_rsrc_attributes; *attr; attr++)
+                class_device_remove_file(class_dev, *attr);
+}
+
+static struct class_interface pccard_rsrc_interface = {
+        .class = &pcmcia_socket_class,
+        .add = &pccard_sysfs_add_rsrc,
+        .remove = __devexit_p(&pccard_sysfs_remove_rsrc),
+};
+
+static int __init nonstatic_sysfs_init(void)
+{
+        return class_interface_register(&pccard_rsrc_interface);
+}
+
+static void __exit nonstatic_sysfs_exit(void)
+{
+        class_interface_unregister(&pccard_rsrc_interface);
+}
+
+module_init(nonstatic_sysfs_init);
+module_exit(nonstatic_sysfs_exit);