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1da177e4 LT |
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/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 | ||
27 | static 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 | ||
51 | static inline int adjust_irq(struct pcmcia_socket *s, adjust_t *adj) { | |
52 | return CS_SUCCESS; | |
53 | } | |
54 | ||
55 | #endif | |
56 | ||
57 | ||
58 | int 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); | |
75 | if ((s->resource_setup_done) && | |
76 | !(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 | } | |
99 | EXPORT_SYMBOL(pcmcia_adjust_resource_info); | |
100 | ||
101 | void pcmcia_validate_mem(struct pcmcia_socket *s) | |
102 | { | |
103 | if (s->resource_ops->validate_mem) | |
104 | s->resource_ops->validate_mem(s); | |
105 | } | |
106 | EXPORT_SYMBOL(pcmcia_validate_mem); | |
107 | ||
108 | int adjust_io_region(struct resource *res, unsigned long r_start, | |
109 | unsigned long r_end, struct pcmcia_socket *s) | |
110 | { | |
111 | if (s->resource_ops->adjust_io_region) | |
112 | return s->resource_ops->adjust_io_region(res, r_start, r_end, s); | |
113 | return -ENOMEM; | |
114 | } | |
115 | ||
116 | struct resource *find_io_region(unsigned long base, int num, | |
117 | unsigned long align, struct pcmcia_socket *s) | |
118 | { | |
119 | if (s->resource_ops->find_io) | |
120 | return s->resource_ops->find_io(base, num, align, s); | |
121 | return NULL; | |
122 | } | |
123 | ||
124 | struct resource *find_mem_region(u_long base, u_long num, u_long align, | |
125 | int low, struct pcmcia_socket *s) | |
126 | { | |
127 | if (s->resource_ops->find_mem) | |
128 | return s->resource_ops->find_mem(base, num, align, low, s); | |
129 | return NULL; | |
130 | } | |
131 | ||
132 | void release_resource_db(struct pcmcia_socket *s) | |
133 | { | |
134 | if (s->resource_ops->exit) | |
135 | s->resource_ops->exit(s); | |
136 | } | |
137 | ||
138 | ||
139 | static int static_init(struct pcmcia_socket *s) | |
140 | { | |
141 | unsigned long flags; | |
142 | ||
143 | /* the good thing about SS_CAP_STATIC_MAP sockets is | |
144 | * that they don't need a resource database */ | |
145 | ||
146 | spin_lock_irqsave(&s->lock, flags); | |
147 | s->resource_setup_done = 1; | |
148 | spin_unlock_irqrestore(&s->lock, flags); | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | ||
154 | struct pccard_resource_ops pccard_static_ops = { | |
155 | .validate_mem = NULL, | |
156 | .adjust_io_region = NULL, | |
157 | .find_io = NULL, | |
158 | .find_mem = NULL, | |
159 | .adjust_resource = NULL, | |
160 | .init = static_init, | |
161 | .exit = NULL, | |
162 | }; | |
163 | EXPORT_SYMBOL(pccard_static_ops); |