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 */ 101