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
  44 struct 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 */
  63 int isapnp_present(void);
  64 int isapnp_cfg_begin(int csn, int device);
  65 int isapnp_cfg_end(void);
  66 unsigned char isapnp_read_byte(unsigned char idx);
  67 void isapnp_write_byte(unsigned char idx, unsigned char val);
  68
  69 #ifdef CONFIG_PROC_FS
  70 int isapnp_proc_init(void);
  71 int isapnp_proc_done(void);
  72 #else
  73 static inline int isapnp_proc_init(void) { return 0; }
  74 static inline int isapnp_proc_done(void) { return 0; }
  75 #endif
  76
  77 /* compat */
  78 struct 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 */
  86 static inline int isapnp_present(void) { return 0; }
  87 static inline int isapnp_cfg_begin(int csn, int device) { return -ENODEV; }
  88 static inline int isapnp_cfg_end(void) { return -ENODEV; }
  89 static inline unsigned char isapnp_read_byte(unsigned char idx) { return 0xff; }
  90 static inline void isapnp_write_byte(unsigned char idx, unsigned char val) { ; }
  91
  92 static 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 */