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1 | /* |
2 | * rsrc_iodyn.c -- Resource management routines for MEM-static sockets. | |
3 | * | |
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. | |
7 | * | |
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. | |
11 | * | |
12 | * (C) 1999 David A. Hinds | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/kernel.h> | |
17 | ||
18 | #include <pcmcia/cs_types.h> | |
19 | #include <pcmcia/ss.h> | |
20 | #include <pcmcia/cs.h> | |
21 | #include <pcmcia/cistpl.h> | |
22 | #include "cs_internal.h" | |
23 | ||
24 | ||
25 | struct pcmcia_align_data { | |
26 | unsigned long mask; | |
27 | unsigned long offset; | |
28 | }; | |
29 | ||
30 | static resource_size_t pcmcia_align(void *align_data, | |
31 | const struct resource *res, | |
32 | resource_size_t size, resource_size_t align) | |
33 | { | |
34 | struct pcmcia_align_data *data = align_data; | |
35 | resource_size_t start; | |
36 | ||
37 | start = (res->start & ~data->mask) + data->offset; | |
38 | if (start < res->start) | |
39 | start += data->mask + 1; | |
40 | ||
41 | #ifdef CONFIG_X86 | |
42 | if (res->flags & IORESOURCE_IO) { | |
43 | if (start & 0x300) | |
44 | start = (start + 0x3ff) & ~0x3ff; | |
45 | } | |
46 | #endif | |
47 | ||
48 | #ifdef CONFIG_M68K | |
49 | if (res->flags & IORESOURCE_IO) { | |
50 | if ((res->start + size - 1) >= 1024) | |
51 | start = res->end; | |
52 | } | |
53 | #endif | |
54 | ||
55 | return start; | |
56 | } | |
57 | ||
58 | ||
59 | static int iodyn_adjust_io_region(struct resource *res, unsigned long r_start, | |
60 | unsigned long r_end, struct pcmcia_socket *s) | |
61 | { | |
62 | return adjust_resource(res, r_start, r_end - r_start + 1); | |
63 | } | |
64 | ||
65 | ||
66 | static struct resource *iodyn_find_io_region(unsigned long base, int num, | |
67 | unsigned long align, struct pcmcia_socket *s) | |
68 | { | |
69 | struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_IO, | |
70 | dev_name(&s->dev)); | |
71 | struct pcmcia_align_data data; | |
72 | unsigned long min = base; | |
73 | int ret; | |
74 | ||
75 | if (align == 0) | |
76 | align = 0x10000; | |
77 | ||
78 | data.mask = align - 1; | |
79 | data.offset = base & data.mask; | |
80 | ||
81 | #ifdef CONFIG_PCI | |
82 | if (s->cb_dev) { | |
83 | ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1, | |
84 | min, 0, pcmcia_align, &data); | |
85 | } else | |
86 | #endif | |
87 | ret = allocate_resource(&ioport_resource, res, num, min, ~0UL, | |
88 | 1, pcmcia_align, &data); | |
89 | ||
90 | if (ret != 0) { | |
91 | kfree(res); | |
92 | res = NULL; | |
93 | } | |
94 | return res; | |
95 | } | |
96 | ||
97 | struct pccard_resource_ops pccard_iodyn_ops = { | |
98 | .validate_mem = NULL, | |
99 | .adjust_io_region = iodyn_adjust_io_region, | |
100 | .find_io = iodyn_find_io_region, | |
101 | .find_mem = NULL, | |
102 | .add_io = NULL, | |
103 | .add_mem = NULL, | |
104 | .init = static_init, | |
105 | .exit = NULL, | |
106 | }; | |
107 | EXPORT_SYMBOL(pccard_iodyn_ops); |