1/*
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/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 "cs_internal.h"
22
23
24#ifdef CONFIG_PCMCIA_IOCTL
25
26#ifdef CONFIG_PCMCIA_PROBE
27
28static int adjust_irq(struct pcmcia_socket *s, adjust_t *adj)
29{
30	int irq;
31	u32 mask;
32
33	irq = adj->resource.irq.IRQ;
34	if ((irq < 0) || (irq > 15))
35		return CS_BAD_IRQ;
36
37	if (adj->Action != REMOVE_MANAGED_RESOURCE)
38		return 0;
39
40	mask = 1 << irq;
41
42	if (!(s->irq_mask & mask))
43		return 0;
44
45	s->irq_mask &= ~mask;
46
47	return 0;
48}
49
50#else
51
52static inline int adjust_irq(struct pcmcia_socket *s, adjust_t *adj) {
53	return CS_SUCCESS;
54}
55
56#endif
57
58
59int pcmcia_adjust_resource_info(adjust_t *adj)
60{
61	struct pcmcia_socket *s;
62	int ret = CS_UNSUPPORTED_FUNCTION;
63	unsigned long flags;
64
65	down_read(&pcmcia_socket_list_rwsem);
66	list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
67
68		if (adj->Resource == RES_IRQ)
69			ret = adjust_irq(s, adj);
70
71		else if (s->resource_ops->adjust_resource) {
72
73			/* you can't use the old interface if the new
74			 * one was used before */
75			spin_lock_irqsave(&s->lock, flags);
76			if ((s->resource_setup_new) &&
77			    !(s->resource_setup_old)) {
78				spin_unlock_irqrestore(&s->lock, flags);
79				continue;
80			} else if (!(s->resource_setup_old))
81				s->resource_setup_old = 1;
82			spin_unlock_irqrestore(&s->lock, flags);
83
84			ret = s->resource_ops->adjust_resource(s, adj);
85			if (!ret) {
86				/* as there's no way we know this is the
87				 * last call to adjust_resource_info, we
88				 * always need to assume this is the latest
89				 * one... */
90				spin_lock_irqsave(&s->lock, flags);
91				s->resource_setup_done = 1;
92				spin_unlock_irqrestore(&s->lock, flags);
93			}
94		}
95	}
96	up_read(&pcmcia_socket_list_rwsem);
97
98	return (ret);
99}
100EXPORT_SYMBOL(pcmcia_adjust_resource_info);
101
102#endif
103
104int pcmcia_validate_mem(struct pcmcia_socket *s)
105{
106	if (s->resource_ops->validate_mem)
107		return s->resource_ops->validate_mem(s);
108	/* if there is no callback, we can assume that everything is OK */
109	return 0;
110}
111EXPORT_SYMBOL(pcmcia_validate_mem);
112
113int pcmcia_adjust_io_region(struct resource *res, unsigned long r_start,
114		     unsigned long r_end, struct pcmcia_socket *s)
115{
116	if (s->resource_ops->adjust_io_region)
117		return s->resource_ops->adjust_io_region(res, r_start, r_end, s);
118	return -ENOMEM;
119}
120EXPORT_SYMBOL(pcmcia_adjust_io_region);
121
122struct resource *pcmcia_find_io_region(unsigned long base, int num,
123		   unsigned long align, struct pcmcia_socket *s)
124{
125	if (s->resource_ops->find_io)
126		return s->resource_ops->find_io(base, num, align, s);
127	return NULL;
128}
129EXPORT_SYMBOL(pcmcia_find_io_region);
130
131struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
132				 int low, struct pcmcia_socket *s)
133{
134	if (s->resource_ops->find_mem)
135		return s->resource_ops->find_mem(base, num, align, low, s);
136	return NULL;
137}
138EXPORT_SYMBOL(pcmcia_find_mem_region);
139
140void release_resource_db(struct pcmcia_socket *s)
141{
142	if (s->resource_ops->exit)
143		s->resource_ops->exit(s);
144}
145
146
147static int static_init(struct pcmcia_socket *s)
148{
149	unsigned long flags;
150
151	/* the good thing about SS_CAP_STATIC_MAP sockets is
152	 * that they don't need a resource database */
153
154	spin_lock_irqsave(&s->lock, flags);
155	s->resource_setup_done = 1;
156	spin_unlock_irqrestore(&s->lock, flags);
157
158	return 0;
159}
160
161
162struct pccard_resource_ops pccard_static_ops = {
163	.validate_mem = NULL,
164	.adjust_io_region = NULL,
165	.find_io = NULL,
166	.find_mem = NULL,
167	.adjust_resource = NULL,
168	.init = static_init,
169	.exit = NULL,
170};
171EXPORT_SYMBOL(pccard_static_ops);
172
173
174#ifdef CONFIG_PCCARD_IODYN
175
176static struct resource *
177make_resource(unsigned long b, unsigned long n, int flags, char *name)
178{
179	struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
180
181	if (res) {
182		res->name = name;
183		res->start = b;
184		res->end = b + n - 1;
185		res->flags = flags;
186	}
187	return res;
188}
189
190struct pcmcia_align_data {
191	unsigned long	mask;
192	unsigned long	offset;
193};
194
195static void pcmcia_align(void *align_data, struct resource *res,
196			unsigned long size, unsigned long align)
197{
198	struct pcmcia_align_data *data = align_data;
199	unsigned long start;
200
201	start = (res->start & ~data->mask) + data->offset;
202	if (start < res->start)
203		start += data->mask + 1;
204	res->start = start;
205
206#ifdef CONFIG_X86
207        if (res->flags & IORESOURCE_IO) {
208                if (start & 0x300) {
209                        start = (start + 0x3ff) & ~0x3ff;
210                        res->start = start;
211                }
212        }
213#endif
214
215#ifdef CONFIG_M68K
216        if (res->flags & IORESOURCE_IO) {
217		if ((res->start + size - 1) >= 1024)
218			res->start = res->end;
219	}
220#endif
221}
222
223
224static int iodyn_adjust_io_region(struct resource *res, unsigned long r_start,
225				      unsigned long r_end, struct pcmcia_socket *s)
226{
227	return adjust_resource(res, r_start, r_end - r_start + 1);
228}
229
230
231static struct resource *iodyn_find_io_region(unsigned long base, int num,
232		unsigned long align, struct pcmcia_socket *s)
233{
234	struct resource *res = make_resource(0, num, IORESOURCE_IO,
235					     s->dev.bus_id);
236	struct pcmcia_align_data data;
237	unsigned long min = base;
238	int ret;
239
240	if (align == 0)
241		align = 0x10000;
242
243	data.mask = align - 1;
244	data.offset = base & data.mask;
245
246#ifdef CONFIG_PCI
247	if (s->cb_dev) {
248		ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
249					     min, 0, pcmcia_align, &data);
250	} else
251#endif
252		ret = allocate_resource(&ioport_resource, res, num, min, ~0UL,
253					1, pcmcia_align, &data);
254
255	if (ret != 0) {
256		kfree(res);
257		res = NULL;
258	}
259	return res;
260}
261
262struct pccard_resource_ops pccard_iodyn_ops = {
263	.validate_mem = NULL,
264	.adjust_io_region = iodyn_adjust_io_region,
265	.find_io = iodyn_find_io_region,
266	.find_mem = NULL,
267	.adjust_resource = NULL,
268	.init = static_init,
269	.exit = NULL,
270};
271EXPORT_SYMBOL(pccard_iodyn_ops);
272
273#endif /* CONFIG_PCCARD_IODYN */
274