LXR linux/include/linux/isapnp.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 *  ISA Plug & Play support
   4 *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
   5 */
   6
   7#ifndef LINUX_ISAPNP_H
   8#define LINUX_ISAPNP_H
   9
  10#include <linux/errno.h>
  11#include <linux/pnp.h>
  12
  13/*
  14 *
  15 */
  16
  17#define ISAPNP_VENDOR(a,b,c)    (((((a)-'A'+1)&0x3f)<<2)|\
  18                                ((((b)-'A'+1)&0x18)>>3)|((((b)-'A'+1)&7)<<13)|\
  19                                ((((c)-'A'+1)&0x1f)<<8))
  20#define ISAPNP_DEVICE(x)        ((((x)&0xf000)>>8)|\
  21                                 (((x)&0x0f00)>>8)|\
  22                                 (((x)&0x00f0)<<8)|\
  23                                 (((x)&0x000f)<<8))
  24#define ISAPNP_FUNCTION(x)      ISAPNP_DEVICE(x)
  25
  26/*
  27 *
  28 */
  29
  30#ifdef __KERNEL__
  31#include <linux/mod_devicetable.h>
  32
  33#define DEVICE_COUNT_COMPATIBLE 4
  34
  35#define ISAPNP_CARD_DEVS        8
  36
  37#define ISAPNP_CARD_ID(_va, _vb, _vc, _device) \
  38                .card_vendor = ISAPNP_VENDOR(_va, _vb, _vc), .card_device = ISAPNP_DEVICE(_device)
  39#define ISAPNP_CARD_END \
  40                .card_vendor = 0, .card_device = 0
  41#define ISAPNP_DEVICE_ID(_va, _vb, _vc, _function) \
  42                { .vendor = ISAPNP_VENDOR(_va, _vb, _vc), .function = ISAPNP_FUNCTION(_function) }
  43
  44struct isapnp_card_id {
  45        unsigned long driver_data;      /* data private to the driver */
  46        unsigned short card_vendor, card_device;
  47        struct {
  48                unsigned short vendor, function;
  49        } devs[ISAPNP_CARD_DEVS];       /* logical devices */
  50};
  51
  52#define ISAPNP_DEVICE_SINGLE(_cva, _cvb, _cvc, _cdevice, _dva, _dvb, _dvc, _dfunction) \
  53                .card_vendor = ISAPNP_VENDOR(_cva, _cvb, _cvc), .card_device =  ISAPNP_DEVICE(_cdevice), \
  54                .vendor = ISAPNP_VENDOR(_dva, _dvb, _dvc), .function = ISAPNP_FUNCTION(_dfunction)
  55#define ISAPNP_DEVICE_SINGLE_END \
  56                .card_vendor = 0, .card_device = 0
  57
  58#if defined(CONFIG_ISAPNP) || (defined(CONFIG_ISAPNP_MODULE) && defined(MODULE))
  59
  60#define __ISAPNP__
  61
  62/* lowlevel configuration */
  63int isapnp_present(void);
  64int isapnp_cfg_begin(int csn, int device);
  65int isapnp_cfg_end(void);
  66unsigned char isapnp_read_byte(unsigned char idx);
  67void isapnp_write_byte(unsigned char idx, unsigned char val);
  68
  69#ifdef CONFIG_PROC_FS
  70int isapnp_proc_init(void);
  71int isapnp_proc_done(void);
  72#else
  73static inline int isapnp_proc_init(void) { return 0; }
  74static inline int isapnp_proc_done(void) { return 0; }
  75#endif
  76
  77/* compat */
  78struct pnp_dev *pnp_find_dev(struct pnp_card *card,
  79                             unsigned short vendor,
  80                             unsigned short function,
  81                             struct pnp_dev *from);
  82
  83#else /* !CONFIG_ISAPNP */
  84
  85/* lowlevel configuration */
  86static inline int isapnp_present(void) { return 0; }
  87static inline int isapnp_cfg_begin(int csn, int device) { return -ENODEV; }
  88static inline int isapnp_cfg_end(void) { return -ENODEV; }
  89static inline unsigned char isapnp_read_byte(unsigned char idx) { return 0xff; }
  90static inline void isapnp_write_byte(unsigned char idx, unsigned char val) { ; }
  91
  92static inline struct pnp_dev *pnp_find_dev(struct pnp_card *card,
  93                                           unsigned short vendor,
  94                                           unsigned short function,
  95                                           struct pnp_dev *from) { return NULL; }
  96
  97#endif /* CONFIG_ISAPNP */
  98
  99#endif /* __KERNEL__ */
 100#endif /* LINUX_ISAPNP_H */
 101