aboutsummaryrefslogtreecommitdiff
path: root/drivers/pcmcia/rsrc_mgr.c
blob: e6f7d410aed618a8f1a80d8bfcdd4715b5cb97da (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
/*
 * rsrc_mgr.c -- Resource management routines and/or wrappers
 *
 * 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/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"

static int static_init(struct pcmcia_socket *s)
{
	/* the good thing about SS_CAP_STATIC_MAP sockets is
	 * that they don't need a resource database */

	s->resource_setup_done = 1;

	return 0;
}


struct pccard_resource_ops pccard_static_ops = {
	.validate_mem = NULL,
	.adjust_io_region = NULL,
	.find_io = NULL,
	.find_mem = NULL,
	.add_io = NULL,
	.add_mem = NULL,
	.init = static_init,
	.exit = NULL,
};
EXPORT_SYMBOL(pccard_static_ops);


#ifdef CONFIG_PCCARD_IODYN

static struct resource *
make_resource(unsigned long b, unsigned long n, int flags, char *name)
{
	struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);

	if (res) {
		res->name = name;
		res->start = b;
		res->end = b + n - 1;
		res->flags = flags;
	}
	return res;
}

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 int iodyn_adjust_io_region(struct resource *res, unsigned long r_start,
				      unsigned long r_end, struct pcmcia_socket *s)
{
	return adjust_resource(res, r_start, r_end - r_start + 1);
}


static struct resource *iodyn_find_io_region(unsigned long base, int num,
		unsigned long align, struct pcmcia_socket *s)
{
	struct resource *res = make_resource(0, num, IORESOURCE_IO,
					     dev_name(&s->dev));
	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;

#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;
}

struct pccard_resource_ops pccard_iodyn_ops = {
	.validate_mem = NULL,
	.adjust_io_region = iodyn_adjust_io_region,
	.find_io = iodyn_find_io_region,
	.find_mem = NULL,
	.add_io = NULL,
	.add_mem = NULL,
	.init = static_init,
	.exit = NULL,
};
EXPORT_SYMBOL(pccard_iodyn_ops);

#endif /* CONFIG_PCCARD_IODYN */