2 * rsrc_iodyn.c -- Resource management routines for MEM-static sockets.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 * The initial developer of the original code is David A. Hinds
9 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
10 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
12 * (C) 1999 David A. Hinds
15 #include <linux/slab.h>
16 #include <linux/module.h>
17 #include <linux/kernel.h>
19 #include <pcmcia/ss.h>
20 #include <pcmcia/cs.h>
21 #include <pcmcia/cistpl.h>
22 #include "cs_internal.h"
25 struct pcmcia_align_data {
30 static resource_size_t pcmcia_align(void *align_data,
31 const struct resource *res,
32 resource_size_t size, resource_size_t align)
34 struct pcmcia_align_data *data = align_data;
35 resource_size_t start;
37 start = (res->start & ~data->mask) + data->offset;
38 if (start < res->start)
39 start += data->mask + 1;
42 if (res->flags & IORESOURCE_IO) {
44 start = (start + 0x3ff) & ~0x3ff;
49 if (res->flags & IORESOURCE_IO) {
50 if ((res->start + size - 1) >= 1024)
59 static struct resource *__iodyn_find_io_region(struct pcmcia_socket *s,
60 unsigned long base, int num,
63 struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_IO,
65 struct pcmcia_align_data data;
66 unsigned long min = base;
69 data.mask = align - 1;
70 data.offset = base & data.mask;
74 ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
75 min, 0, pcmcia_align, &data);
78 ret = allocate_resource(&ioport_resource, res, num, min, ~0UL,
79 1, pcmcia_align, &data);
88 static int iodyn_find_io(struct pcmcia_socket *s, unsigned int attr,
89 unsigned int *base, unsigned int num,
90 unsigned int align, struct resource **parent)
94 /* Check for an already-allocated window that must conflict with
95 * what was asked for. It is a hack because it does not catch all
96 * potential conflicts, just the most obvious ones.
98 for (i = 0; i < MAX_IO_WIN; i++) {
105 if ((s->io[i].res->start & (align-1)) == *base)
109 for (i = 0; i < MAX_IO_WIN; i++) {
110 struct resource *res = s->io[i].res;
113 if (res && (res->flags & IORESOURCE_BITS) !=
114 (attr & IORESOURCE_BITS))
121 res = s->io[i].res = __iodyn_find_io_region(s, *base,
127 s->io[i].res->flags =
128 ((res->flags & ~IORESOURCE_BITS) |
129 (attr & IORESOURCE_BITS));
130 s->io[i].InUse = num;
135 /* Try to extend top of window */
137 if ((*base == 0) || (*base == try)) {
138 if (adjust_resource(s->io[i].res, res->start,
139 res->end - res->start + num + 1))
142 s->io[i].InUse += num;
147 /* Try to extend bottom of window */
148 try = res->start - num;
149 if ((*base == 0) || (*base == try)) {
150 if (adjust_resource(s->io[i].res,
152 res->end - res->start + num + 1))
155 s->io[i].InUse += num;
165 struct pccard_resource_ops pccard_iodyn_ops = {
166 .validate_mem = NULL,
167 .find_io = iodyn_find_io,
172 EXPORT_SYMBOL(pccard_iodyn_ops);