2 * rsrc_mgr.c -- Resource management routines and/or wrappers
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/module.h>
16 #include <linux/kernel.h>
18 #include <pcmcia/cs_types.h>
19 #include <pcmcia/ss.h>
20 #include <pcmcia/cs.h>
21 #include "cs_internal.h"
24 #ifdef CONFIG_PCMCIA_IOCTL
26 #ifdef CONFIG_PCMCIA_PROBE
28 static int adjust_irq(struct pcmcia_socket *s, adjust_t *adj)
33 irq = adj->resource.irq.IRQ;
34 if ((irq < 0) || (irq > 15))
37 if (adj->Action != REMOVE_MANAGED_RESOURCE)
42 if (!(s->irq_mask & mask))
52 static inline int adjust_irq(struct pcmcia_socket *s, adjust_t *adj) {
59 int pcmcia_adjust_resource_info(adjust_t *adj)
61 struct pcmcia_socket *s;
62 int ret = CS_UNSUPPORTED_FUNCTION;
65 down_read(&pcmcia_socket_list_rwsem);
66 list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
68 if (adj->Resource == RES_IRQ)
69 ret = adjust_irq(s, adj);
71 else if (s->resource_ops->adjust_resource) {
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);
80 } else if (!(s->resource_setup_old))
81 s->resource_setup_old = 1;
82 spin_unlock_irqrestore(&s->lock, flags);
84 ret = s->resource_ops->adjust_resource(s, adj);
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
90 spin_lock_irqsave(&s->lock, flags);
91 s->resource_setup_done = 1;
92 spin_unlock_irqrestore(&s->lock, flags);
96 up_read(&pcmcia_socket_list_rwsem);
100 EXPORT_SYMBOL(pcmcia_adjust_resource_info);
104 int pcmcia_validate_mem(struct pcmcia_socket *s)
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 */
111 EXPORT_SYMBOL(pcmcia_validate_mem);
113 int pcmcia_adjust_io_region(struct resource *res, unsigned long r_start,
114 unsigned long r_end, struct pcmcia_socket *s)
116 if (s->resource_ops->adjust_io_region)
117 return s->resource_ops->adjust_io_region(res, r_start, r_end, s);
120 EXPORT_SYMBOL(pcmcia_adjust_io_region);
122 struct resource *pcmcia_find_io_region(unsigned long base, int num,
123 unsigned long align, struct pcmcia_socket *s)
125 if (s->resource_ops->find_io)
126 return s->resource_ops->find_io(base, num, align, s);
129 EXPORT_SYMBOL(pcmcia_find_io_region);
131 struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
132 int low, struct pcmcia_socket *s)
134 if (s->resource_ops->find_mem)
135 return s->resource_ops->find_mem(base, num, align, low, s);
138 EXPORT_SYMBOL(pcmcia_find_mem_region);
140 void release_resource_db(struct pcmcia_socket *s)
142 if (s->resource_ops->exit)
143 s->resource_ops->exit(s);
147 static int static_init(struct pcmcia_socket *s)
151 /* the good thing about SS_CAP_STATIC_MAP sockets is
152 * that they don't need a resource database */
154 spin_lock_irqsave(&s->lock, flags);
155 s->resource_setup_done = 1;
156 spin_unlock_irqrestore(&s->lock, flags);
162 struct pccard_resource_ops pccard_static_ops = {
163 .validate_mem = NULL,
164 .adjust_io_region = NULL,
167 .adjust_resource = NULL,
171 EXPORT_SYMBOL(pccard_static_ops);
174 #ifdef CONFIG_PCCARD_IODYN
176 static struct resource *
177 make_resource(unsigned long b, unsigned long n, int flags, char *name)
179 struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
184 res->end = b + n - 1;
190 struct pcmcia_align_data {
192 unsigned long offset;
195 static void pcmcia_align(void *align_data, struct resource *res,
196 unsigned long size, unsigned long align)
198 struct pcmcia_align_data *data = align_data;
201 start = (res->start & ~data->mask) + data->offset;
202 if (start < res->start)
203 start += data->mask + 1;
207 if (res->flags & IORESOURCE_IO) {
209 start = (start + 0x3ff) & ~0x3ff;
216 if (res->flags & IORESOURCE_IO) {
217 if ((res->start + size - 1) >= 1024)
218 res->start = res->end;
224 static int iodyn_adjust_io_region(struct resource *res, unsigned long r_start,
225 unsigned long r_end, struct pcmcia_socket *s)
227 return adjust_resource(res, r_start, r_end - r_start + 1);
231 static struct resource *iodyn_find_io_region(unsigned long base, int num,
232 unsigned long align, struct pcmcia_socket *s)
234 struct resource *res = make_resource(0, num, IORESOURCE_IO,
236 struct pcmcia_align_data data;
237 unsigned long min = base;
243 data.mask = align - 1;
244 data.offset = base & data.mask;
248 ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
249 min, 0, pcmcia_align, &data);
252 ret = allocate_resource(&ioport_resource, res, num, min, ~0UL,
253 1, pcmcia_align, &data);
262 struct 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,
267 .adjust_resource = NULL,
271 EXPORT_SYMBOL(pccard_iodyn_ops);
273 #endif /* CONFIG_PCCARD_IODYN */