linux/include/linux/isapnp.h
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   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/* export used IDs outside module */
  60#define ISAPNP_CARD_TABLE(name) \
  61                MODULE_GENERIC_TABLE(isapnp_card, name)
  62
  63struct 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 */
  82int isapnp_present(void);
  83int isapnp_cfg_begin(int csn, int device);
  84int isapnp_cfg_end(void);
  85unsigned char isapnp_read_byte(unsigned char idx);
  86void isapnp_write_byte(unsigned char idx, unsigned char val);
  87
  88#ifdef CONFIG_PROC_FS
  89int isapnp_proc_init(void);
  90int isapnp_proc_done(void);
  91#else
  92static inline int isapnp_proc_init(void) { return 0; }
  93static inline int isapnp_proc_done(void) { return 0; }
  94#endif
  95
  96/* compat */
  97struct pnp_card *pnp_find_card(unsigned short vendor,
  98                               unsigned short device,
  99                               struct pnp_card *from);
 100struct 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 */
 108static inline int isapnp_present(void) { return 0; }
 109static inline int isapnp_cfg_begin(int csn, int device) { return -ENODEV; }
 110static inline int isapnp_cfg_end(void) { return -ENODEV; }
 111static inline unsigned char isapnp_read_byte(unsigned char idx) { return 0xff; }
 112static inline void isapnp_write_byte(unsigned char idx, unsigned char val) { ; }
 113
 114static inline struct pnp_card *pnp_find_card(unsigned short vendor,
 115                                             unsigned short device,
 116                                             struct pnp_card *from) { return NULL; }
 117static 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 */
 126
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