xref: /linux/include/linux/isapnp.h (revision f3d9478b2ce468c3115b02ecae7e975990697f15)
1 /*
2  *  ISA Plug & Play support
3  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
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  *  Configuration registers (TODO: change by specification)
30  */
31 
32 #define ISAPNP_CFG_ACTIVATE		0x30	/* byte */
33 #define ISAPNP_CFG_MEM			0x40	/* 4 * dword */
34 #define ISAPNP_CFG_PORT			0x60	/* 8 * word */
35 #define ISAPNP_CFG_IRQ			0x70	/* 2 * word */
36 #define ISAPNP_CFG_DMA			0x74	/* 2 * byte */
37 
38 /*
39  *
40  */
41 
42 #define ISAPNP_VENDOR(a,b,c)	(((((a)-'A'+1)&0x3f)<<2)|\
43 				((((b)-'A'+1)&0x18)>>3)|((((b)-'A'+1)&7)<<13)|\
44 				((((c)-'A'+1)&0x1f)<<8))
45 #define ISAPNP_DEVICE(x)	((((x)&0xf000)>>8)|\
46 				 (((x)&0x0f00)>>8)|\
47 				 (((x)&0x00f0)<<8)|\
48 				 (((x)&0x000f)<<8))
49 #define ISAPNP_FUNCTION(x)	ISAPNP_DEVICE(x)
50 
51 /*
52  *
53  */
54 
55 #ifdef __KERNEL__
56 
57 #define DEVICE_COUNT_COMPATIBLE 4
58 
59 #define ISAPNP_ANY_ID		0xffff
60 #define ISAPNP_CARD_DEVS	8
61 
62 #define ISAPNP_CARD_ID(_va, _vb, _vc, _device) \
63 		.card_vendor = ISAPNP_VENDOR(_va, _vb, _vc), .card_device = ISAPNP_DEVICE(_device)
64 #define ISAPNP_CARD_END \
65 		.card_vendor = 0, .card_device = 0
66 #define ISAPNP_DEVICE_ID(_va, _vb, _vc, _function) \
67 		{ .vendor = ISAPNP_VENDOR(_va, _vb, _vc), .function = ISAPNP_FUNCTION(_function) }
68 
69 /* export used IDs outside module */
70 #define ISAPNP_CARD_TABLE(name) \
71 		MODULE_GENERIC_TABLE(isapnp_card, name)
72 
73 struct isapnp_card_id {
74 	unsigned long driver_data;	/* data private to the driver */
75 	unsigned short card_vendor, card_device;
76 	struct {
77 		unsigned short vendor, function;
78 	} devs[ISAPNP_CARD_DEVS];	/* logical devices */
79 };
80 
81 #define ISAPNP_DEVICE_SINGLE(_cva, _cvb, _cvc, _cdevice, _dva, _dvb, _dvc, _dfunction) \
82 		.card_vendor = ISAPNP_VENDOR(_cva, _cvb, _cvc), .card_device =  ISAPNP_DEVICE(_cdevice), \
83 		.vendor = ISAPNP_VENDOR(_dva, _dvb, _dvc), .function = ISAPNP_FUNCTION(_dfunction)
84 #define ISAPNP_DEVICE_SINGLE_END \
85 		.card_vendor = 0, .card_device = 0
86 
87 struct isapnp_device_id {
88 	unsigned short card_vendor, card_device;
89 	unsigned short vendor, function;
90 	unsigned long driver_data;	/* data private to the driver */
91 };
92 
93 #if defined(CONFIG_ISAPNP) || (defined(CONFIG_ISAPNP_MODULE) && defined(MODULE))
94 
95 #define __ISAPNP__
96 
97 /* lowlevel configuration */
98 int isapnp_present(void);
99 int isapnp_cfg_begin(int csn, int device);
100 int isapnp_cfg_end(void);
101 unsigned char isapnp_read_byte(unsigned char idx);
102 void isapnp_write_byte(unsigned char idx, unsigned char val);
103 
104 #ifdef CONFIG_PROC_FS
105 int isapnp_proc_init(void);
106 int isapnp_proc_done(void);
107 #else
108 static inline int isapnp_proc_init(void) { return 0; }
109 static inline int isapnp_proc_done(void) { return 0; }
110 #endif
111 
112 /* compat */
113 struct pnp_card *pnp_find_card(unsigned short vendor,
114 			       unsigned short device,
115 			       struct pnp_card *from);
116 struct pnp_dev *pnp_find_dev(struct pnp_card *card,
117 			     unsigned short vendor,
118 			     unsigned short function,
119 			     struct pnp_dev *from);
120 
121 #else /* !CONFIG_ISAPNP */
122 
123 /* lowlevel configuration */
124 static inline int isapnp_present(void) { return 0; }
125 static inline int isapnp_cfg_begin(int csn, int device) { return -ENODEV; }
126 static inline int isapnp_cfg_end(void) { return -ENODEV; }
127 static inline unsigned char isapnp_read_byte(unsigned char idx) { return 0xff; }
128 static inline void isapnp_write_byte(unsigned char idx, unsigned char val) { ; }
129 
130 static inline struct pnp_card *pnp_find_card(unsigned short vendor,
131 					     unsigned short device,
132 					     struct pnp_card *from) { return NULL; }
133 static inline struct pnp_dev *pnp_find_dev(struct pnp_card *card,
134 					   unsigned short vendor,
135 					   unsigned short function,
136 					   struct pnp_dev *from) { return NULL; }
137 
138 #endif /* CONFIG_ISAPNP */
139 
140 #endif /* __KERNEL__ */
141 #endif /* LINUX_ISAPNP_H */
142