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isapnp.h
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1 /*
2  * ISA Plug & Play support
3  * Copyright (c) by Jaroslav Kysela <[email protected]>
4  *
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19  *
20  */
21 
22 #ifndef LINUX_ISAPNP_H
23 #define LINUX_ISAPNP_H
24 
25 #include <linux/errno.h>
26 #include <linux/pnp.h>
27 
28 /*
29  *
30  */
31 
32 #define ISAPNP_VENDOR(a,b,c) (((((a)-'A'+1)&0x3f)<<2)|\
33  ((((b)-'A'+1)&0x18)>>3)|((((b)-'A'+1)&7)<<13)|\
34  ((((c)-'A'+1)&0x1f)<<8))
35 #define ISAPNP_DEVICE(x) ((((x)&0xf000)>>8)|\
36  (((x)&0x0f00)>>8)|\
37  (((x)&0x00f0)<<8)|\
38  (((x)&0x000f)<<8))
39 #define ISAPNP_FUNCTION(x) ISAPNP_DEVICE(x)
40 
41 /*
42  *
43  */
44 
45 #ifdef __KERNEL__
46 #include <linux/mod_devicetable.h>
47 
48 #define DEVICE_COUNT_COMPATIBLE 4
49 
50 #define ISAPNP_CARD_DEVS 8
51 
52 #define ISAPNP_CARD_ID(_va, _vb, _vc, _device) \
53  .card_vendor = ISAPNP_VENDOR(_va, _vb, _vc), .card_device = ISAPNP_DEVICE(_device)
54 #define ISAPNP_CARD_END \
55  .card_vendor = 0, .card_device = 0
56 #define ISAPNP_DEVICE_ID(_va, _vb, _vc, _function) \
57  { .vendor = ISAPNP_VENDOR(_va, _vb, _vc), .function = ISAPNP_FUNCTION(_function) }
58 
59 /* export used IDs outside module */
60 #define ISAPNP_CARD_TABLE(name) \
61  MODULE_GENERIC_TABLE(isapnp_card, name)
62 
63 struct isapnp_card_id {
64  unsigned long driver_data; /* data private to the driver */
65  unsigned short card_vendor, card_device;
66  struct {
67  unsigned short vendor, function;
68  } devs[ISAPNP_CARD_DEVS]; /* logical devices */
69 };
70 
71 #define ISAPNP_DEVICE_SINGLE(_cva, _cvb, _cvc, _cdevice, _dva, _dvb, _dvc, _dfunction) \
72  .card_vendor = ISAPNP_VENDOR(_cva, _cvb, _cvc), .card_device = ISAPNP_DEVICE(_cdevice), \
73  .vendor = ISAPNP_VENDOR(_dva, _dvb, _dvc), .function = ISAPNP_FUNCTION(_dfunction)
74 #define ISAPNP_DEVICE_SINGLE_END \
75  .card_vendor = 0, .card_device = 0
76 
77 #if defined(CONFIG_ISAPNP) || (defined(CONFIG_ISAPNP_MODULE) && defined(MODULE))
78 
79 #define __ISAPNP__
80 
81 /* lowlevel configuration */
82 int isapnp_present(void);
83 int isapnp_cfg_begin(int csn, int device);
84 int isapnp_cfg_end(void);
85 unsigned char isapnp_read_byte(unsigned char idx);
86 void isapnp_write_byte(unsigned char idx, unsigned char val);
87 
88 #ifdef CONFIG_PROC_FS
89 int isapnp_proc_init(void);
90 int isapnp_proc_done(void);
91 #else
92 static inline int isapnp_proc_init(void) { return 0; }
93 static inline int isapnp_proc_done(void) { return 0; }
94 #endif
95 
96 /* compat */
97 struct pnp_card *pnp_find_card(unsigned short vendor,
98  unsigned short device,
99  struct pnp_card *from);
100 struct pnp_dev *pnp_find_dev(struct pnp_card *card,
101  unsigned short vendor,
102  unsigned short function,
103  struct pnp_dev *from);
104 
105 #else /* !CONFIG_ISAPNP */
106 
107 /* lowlevel configuration */
108 static inline int isapnp_present(void) { return 0; }
109 static inline int isapnp_cfg_begin(int csn, int device) { return -ENODEV; }
110 static inline int isapnp_cfg_end(void) { return -ENODEV; }
111 static inline unsigned char isapnp_read_byte(unsigned char idx) { return 0xff; }
112 static inline void isapnp_write_byte(unsigned char idx, unsigned char val) { ; }
113 
114 static inline struct pnp_card *pnp_find_card(unsigned short vendor,
115  unsigned short device,
116  struct pnp_card *from) { return NULL; }
117 static inline struct pnp_dev *pnp_find_dev(struct pnp_card *card,
118  unsigned short vendor,
119  unsigned short function,
120  struct pnp_dev *from) { return NULL; }
121 
122 #endif /* CONFIG_ISAPNP */
123 
124 #endif /* __KERNEL__ */
125 #endif /* LINUX_ISAPNP_H */
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