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 */