blob: 514609369836e537431f99bba4308ea8f21a74a8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * rsrc_mgr.c -- Resource management routines and/or wrappers
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/config.h>
16#include <linux/module.h>
17#include <linux/kernel.h>
18
19#include <pcmcia/cs_types.h>
20#include <pcmcia/ss.h>
21#include <pcmcia/cs.h>
22#include "cs_internal.h"
23
24
25#ifdef CONFIG_PCMCIA_PROBE
26
27static int adjust_irq(struct pcmcia_socket *s, adjust_t *adj)
28{
29 int irq;
30 u32 mask;
31
32 irq = adj->resource.irq.IRQ;
33 if ((irq < 0) || (irq > 15))
34 return CS_BAD_IRQ;
35
36 if (adj->Action != REMOVE_MANAGED_RESOURCE)
37 return 0;
38
39 mask = 1 << irq;
40
41 if (!(s->irq_mask & mask))
42 return 0;
43
44 s->irq_mask &= ~mask;
45
46 return 0;
47}
48
49#else
50
51static inline int adjust_irq(struct pcmcia_socket *s, adjust_t *adj) {
52 return CS_SUCCESS;
53}
54
55#endif
56
57
58int pcmcia_adjust_resource_info(adjust_t *adj)
59{
60 struct pcmcia_socket *s;
61 int ret = CS_UNSUPPORTED_FUNCTION;
62 unsigned long flags;
63
64 down_read(&pcmcia_socket_list_rwsem);
65 list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
66
67 if (adj->Resource == RES_IRQ)
68 ret = adjust_irq(s, adj);
69
70 else if (s->resource_ops->adjust_resource) {
71
72 /* you can't use the old interface if the new
73 * one was used before */
74 spin_lock_irqsave(&s->lock, flags);
Dominik Brodowski3c299762005-06-27 16:28:46 -070075 if ((s->resource_setup_new) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 !(s->resource_setup_old)) {
77 spin_unlock_irqrestore(&s->lock, flags);
78 continue;
79 } else if (!(s->resource_setup_old))
80 s->resource_setup_old = 1;
81 spin_unlock_irqrestore(&s->lock, flags);
82
83 ret = s->resource_ops->adjust_resource(s, adj);
84 if (!ret) {
85 /* as there's no way we know this is the
86 * last call to adjust_resource_info, we
87 * always need to assume this is the latest
88 * one... */
89 spin_lock_irqsave(&s->lock, flags);
90 s->resource_setup_done = 1;
91 spin_unlock_irqrestore(&s->lock, flags);
92 }
93 }
94 }
95 up_read(&pcmcia_socket_list_rwsem);
96
97 return (ret);
98}
99EXPORT_SYMBOL(pcmcia_adjust_resource_info);
100
Dominik Brodowskide759142005-09-28 19:41:56 +0200101int pcmcia_validate_mem(struct pcmcia_socket *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102{
103 if (s->resource_ops->validate_mem)
Dominik Brodowskide759142005-09-28 19:41:56 +0200104 return s->resource_ops->validate_mem(s);
105 /* if there is no callback, we can assume that everything is OK */
106 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107}
108EXPORT_SYMBOL(pcmcia_validate_mem);
109
Dominik Brodowskie6ea0b92005-06-27 16:28:52 -0700110int pcmcia_adjust_io_region(struct resource *res, unsigned long r_start,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 unsigned long r_end, struct pcmcia_socket *s)
112{
113 if (s->resource_ops->adjust_io_region)
114 return s->resource_ops->adjust_io_region(res, r_start, r_end, s);
115 return -ENOMEM;
116}
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700117EXPORT_SYMBOL(pcmcia_adjust_io_region);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
Dominik Brodowskie6ea0b92005-06-27 16:28:52 -0700119struct resource *pcmcia_find_io_region(unsigned long base, int num,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 unsigned long align, struct pcmcia_socket *s)
121{
122 if (s->resource_ops->find_io)
123 return s->resource_ops->find_io(base, num, align, s);
124 return NULL;
125}
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700126EXPORT_SYMBOL(pcmcia_find_io_region);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
Dominik Brodowskie6ea0b92005-06-27 16:28:52 -0700128struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 int low, struct pcmcia_socket *s)
130{
131 if (s->resource_ops->find_mem)
132 return s->resource_ops->find_mem(base, num, align, low, s);
133 return NULL;
134}
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700135EXPORT_SYMBOL(pcmcia_find_mem_region);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
137void release_resource_db(struct pcmcia_socket *s)
138{
139 if (s->resource_ops->exit)
140 s->resource_ops->exit(s);
141}
142
143
144static int static_init(struct pcmcia_socket *s)
145{
146 unsigned long flags;
147
148 /* the good thing about SS_CAP_STATIC_MAP sockets is
149 * that they don't need a resource database */
150
151 spin_lock_irqsave(&s->lock, flags);
152 s->resource_setup_done = 1;
153 spin_unlock_irqrestore(&s->lock, flags);
154
155 return 0;
156}
157
158
159struct pccard_resource_ops pccard_static_ops = {
160 .validate_mem = NULL,
161 .adjust_io_region = NULL,
162 .find_io = NULL,
163 .find_mem = NULL,
164 .adjust_resource = NULL,
165 .init = static_init,
166 .exit = NULL,
167};
168EXPORT_SYMBOL(pccard_static_ops);
Dominik Brodowski3b27e942005-12-07 12:32:20 +0100169
170
171#ifdef CONFIG_PCCARD_IODYN
172
173static struct resource *
174make_resource(unsigned long b, unsigned long n, int flags, char *name)
175{
176 struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
177
178 if (res) {
179 res->name = name;
180 res->start = b;
181 res->end = b + n - 1;
182 res->flags = flags;
183 }
184 return res;
185}
186
187struct pcmcia_align_data {
188 unsigned long mask;
189 unsigned long offset;
190};
191
192static void pcmcia_align(void *align_data, struct resource *res,
193 unsigned long size, unsigned long align)
194{
195 struct pcmcia_align_data *data = align_data;
196 unsigned long start;
197
198 start = (res->start & ~data->mask) + data->offset;
199 if (start < res->start)
200 start += data->mask + 1;
201 res->start = start;
202
203#ifdef CONFIG_X86
204 if (res->flags & IORESOURCE_IO) {
205 if (start & 0x300) {
206 start = (start + 0x3ff) & ~0x3ff;
207 res->start = start;
208 }
209 }
210#endif
211
212#ifdef CONFIG_M68K
213 if (res->flags & IORESOURCE_IO) {
214 if ((res->start + size - 1) >= 1024)
215 res->start = res->end;
216 }
217#endif
218}
219
220
221static int iodyn_adjust_io_region(struct resource *res, unsigned long r_start,
222 unsigned long r_end, struct pcmcia_socket *s)
223{
224 return adjust_resource(res, r_start, r_end - r_start + 1);
225}
226
227
228static struct resource *iodyn_find_io_region(unsigned long base, int num,
229 unsigned long align, struct pcmcia_socket *s)
230{
231 struct resource *res = make_resource(0, num, IORESOURCE_IO,
232 s->dev.class_id);
233 struct pcmcia_align_data data;
234 unsigned long min = base;
235 int ret;
236
237 if (align == 0)
238 align = 0x10000;
239
240 data.mask = align - 1;
241 data.offset = base & data.mask;
242
243#ifdef CONFIG_PCI
244 if (s->cb_dev) {
245 ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
246 min, 0, pcmcia_align, &data);
247 } else
248#endif
249 ret = allocate_resource(&ioport_resource, res, num, min, ~0UL,
250 1, pcmcia_align, &data);
251
252 if (ret != 0) {
253 kfree(res);
254 res = NULL;
255 }
256 return res;
257}
258
259struct pccard_resource_ops pccard_iodyn_ops = {
260 .validate_mem = NULL,
261 .adjust_io_region = iodyn_adjust_io_region,
262 .find_io = iodyn_find_io_region,
263 .find_mem = NULL,
264 .adjust_resource = NULL,
265 .init = static_init,
266 .exit = NULL,
267};
268EXPORT_SYMBOL(pccard_iodyn_ops);
269
270#endif /* CONFIG_PCCARD_IODYN */