include/linux/isapnp.h

   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  *
  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 struct isapnp_card_id {
  60         unsigned long driver_data;      /* data private to the driver */
  61         unsigned short card_vendor, card_device;
  62         struct {
  63                 unsigned short vendor, function;
  64         } devs[ISAPNP_CARD_DEVS];       /* logical devices */
  65 };
  66
  67 #define ISAPNP_DEVICE_SINGLE(_cva, _cvb, _cvc, _cdevice, _dva, _dvb, _dvc, _dfunction) \
  68                 .card_vendor = ISAPNP_VENDOR(_cva, _cvb, _cvc), .card_device =  ISAPNP_DEVICE(_cdevice), \
  69                 .vendor = ISAPNP_VENDOR(_dva, _dvb, _dvc), .function = ISAPNP_FUNCTION(_dfunction)
  70 #define ISAPNP_DEVICE_SINGLE_END \
  71                 .card_vendor = 0, .card_device = 0
  72
  73 #if defined(CONFIG_ISAPNP) || (defined(CONFIG_ISAPNP_MODULE) && defined(MODULE))
  74
  75 #define __ISAPNP__
  76
  77 /* lowlevel configuration */
  78 int isapnp_present(void);
  79 int isapnp_cfg_begin(int csn, int device);
  80 int isapnp_cfg_end(void);
  81 unsigned char isapnp_read_byte(unsigned char idx);
  82 void isapnp_write_byte(unsigned char idx, unsigned char val);
  83
  84 #ifdef CONFIG_PROC_FS
  85 int isapnp_proc_init(void);
  86 int isapnp_proc_done(void);
  87 #else
  88 static inline int isapnp_proc_init(void) { return 0; }
  89 static inline int isapnp_proc_done(void) { return 0; }
  90 #endif
  91
  92 /* compat */
  93 struct pnp_card *pnp_find_card(unsigned short vendor,
  94                                unsigned short device,
  95                                struct pnp_card *from);
  96 struct pnp_dev *pnp_find_dev(struct pnp_card *card,
  97                              unsigned short vendor,
  98                              unsigned short function,
  99                              struct pnp_dev *from);
 100
 101 #else /* !CONFIG_ISAPNP */
 102
 103 /* lowlevel configuration */
 104 static inline int isapnp_present(void) { return 0; }
 105 static inline int isapnp_cfg_begin(int csn, int device) { return -ENODEV; }
 106 static inline int isapnp_cfg_end(void) { return -ENODEV; }
 107 static inline unsigned char isapnp_read_byte(unsigned char idx) { return 0xff; }
 108 static inline void isapnp_write_byte(unsigned char idx, unsigned char val) { ; }
 109
 110 static inline struct pnp_card *pnp_find_card(unsigned short vendor,
 111                                              unsigned short device,
 112                                              struct pnp_card *from) { return NULL; }
 113 static inline struct pnp_dev *pnp_find_dev(struct pnp_card *card,
 114                                            unsigned short vendor,
 115                                            unsigned short function,
 116                                            struct pnp_dev *from) { return NULL; }
 117
 118 #endif /* CONFIG_ISAPNP */
 119
 120 #endif /* __KERNEL__ */
 121 #endif /* LINUX_ISAPNP_H */