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/cistpl.h>
21 #include "cs_internal.h"
24 struct pcmcia_align_data {
29 static resource_size_t pcmcia_align(void *align_data,
30 const struct resource *res,
31 resource_size_t size, resource_size_t align)
33 struct pcmcia_align_data *data = align_data;
34 resource_size_t start;
36 start = (res->start & ~data->mask) + data->offset;
37 if (start < res->start)
38 start += data->mask + 1;
41 if (res->flags & IORESOURCE_IO) {
43 start = (start + 0x3ff) & ~0x3ff;
48 if (res->flags & IORESOURCE_IO) {
49 if ((res->start + size - 1) >= 1024)
58 static struct resource *__iodyn_find_io_region(struct pcmcia_socket *s,
59 unsigned long base, int num,
62 struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_IO,
64 struct pcmcia_align_data data;
65 unsigned long min = base;
68 data.mask = align - 1;
69 data.offset = base & data.mask;
73 ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
74 min, 0, pcmcia_align, &data);
77 ret = allocate_resource(&ioport_resource, res, num, min, ~0UL,
78 1, pcmcia_align, &data);
87 static int iodyn_find_io(struct pcmcia_socket *s, unsigned int attr,
88 unsigned int *base, unsigned int num,
89 unsigned int align, struct resource **parent)
93 /* Check for an already-allocated window that must conflict with
94 * what was asked for. It is a hack because it does not catch all
95 * potential conflicts, just the most obvious ones.
97 for (i = 0; i < MAX_IO_WIN; i++) {
104 if ((s->io[i].res->start & (align-1)) == *base)
108 for (i = 0; i < MAX_IO_WIN; i++) {
109 struct resource *res = s->io[i].res;
112 if (res && (res->flags & IORESOURCE_BITS) !=
113 (attr & IORESOURCE_BITS))
120 res = s->io[i].res = __iodyn_find_io_region(s, *base,
126 s->io[i].res->flags =
127 ((res->flags & ~IORESOURCE_BITS) |
128 (attr & IORESOURCE_BITS));
129 s->io[i].InUse = num;
134 /* Try to extend top of window */
136 if ((*base == 0) || (*base == try)) {
137 if (adjust_resource(s->io[i].res, res->start,
138 resource_size(res) + num))
141 s->io[i].InUse += num;
146 /* Try to extend bottom of window */
147 try = res->start - num;
148 if ((*base == 0) || (*base == try)) {
149 if (adjust_resource(s->io[i].res,
151 resource_size(res) + num))
154 s->io[i].InUse += num;
164 struct pccard_resource_ops pccard_iodyn_ops = {
165 .validate_mem = NULL,
166 .find_io = iodyn_find_io,
171 EXPORT_SYMBOL(pccard_iodyn_ops);