lib/pci.h

   1 /*
   2  *      $Id: pci.h,v 1.1 1999/01/22 21:05:34 mj Exp $
   3  *
   4  *      The PCI Library
   5  *
   6  *      Copyright (c) 1997--1999 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
   7  *
   8  *      Can be freely distributed and used under the terms of the GNU GPL.
   9  */
  10
  11 #ifndef _PCI_LIB_H
  12 #define _PCI_LIB_H
  13
  14 #include "config.h"
  15
  16 #ifdef HAVE_OWN_HEADER_H
  17 #include "header.h"
  18 #else
  19 #include <linux/pci.h>
  20 #endif
  21
  22 /*
  23  *      Types
  24  */
  25
  26 #include <linux/types.h>
  27
  28 typedef __u8 byte;
  29 typedef __u8 u8;
  30 typedef __u16 word;
  31 typedef __u16 u16;
  32 typedef __u32 u32;
  33
  34 /*
  35  *      PCI Access Structure
  36  */
  37
  38 struct pci_methods;
  39 struct nl_entry;
  40
  41 #define PCI_ACCESS_AUTO                 0       /* Autodetection (params: none) */
  42 #define PCI_ACCESS_PROC_BUS_PCI         1       /* Linux /proc/bus/pci (params: path) */
  43 #define PCI_ACCESS_SYSCALLS             2       /* pciconfig_read() syscalls (params: none) */
  44 #define PCI_ACCESS_I386_TYPE1           3       /* i386 ports, type 1 (params: none) */
  45 #define PCI_ACCESS_I386_TYPE2           4       /* i386 ports, type 2 (params: none) */
  46 #define PCI_ACCESS_DUMP                 5       /* Dump file (params: filename) */
  47 #define PCI_ACCESS_MAX                  6
  48
  49 struct pci_access {
  50   /* Options you can change: */
  51   unsigned int method;                  /* Access method */
  52   char *method_params[PCI_ACCESS_MAX];  /* Parameters for the methods */
  53   int writeable;                        /* Open in read/write mode */
  54   int buscentric;                       /* Bus-centric view of the world */
  55   char *id_file_name;                   /* Name of ID list file */
  56   int numeric_ids;                      /* Don't resolve device IDs to names */
  57   int debugging;                        /* Turn on debugging messages */
  58
  59   /* Functions you can override: */
  60   void (*error)(char *msg, ...);        /* Write error message and quit */
  61   void (*warning)(char *msg, ...);      /* Write a warning message */
  62   void (*debug)(char *msg, ...);        /* Write a debugging message */
  63
  64   struct pci_dev *devices;              /* Devices found on this bus */
  65
  66   /* Fields used internally: */
  67   struct pci_methods *methods;
  68   char *nl_list;                        /* Name list cache */
  69   struct nl_entry **nl_hash;
  70   int fd;                               /* proc: fd */
  71   int fd_rw;                            /* proc: fd opened read-write */
  72   struct pci_dev *cached_dev;           /* proc: device the fd is for */
  73 };
  74
  75 /* Initialize PCI access */
  76 struct pci_access *pci_alloc(void);
  77 void pci_init(struct pci_access *);
  78 void pci_cleanup(struct pci_access *);
  79
  80 /* Scanning of devices */
  81 void pci_scan_bus(struct pci_access *acc);
  82 struct pci_dev *pci_get_dev(struct pci_access *acc, int bus, int dev, int func); /* Raw access to specified device */
  83 void pci_free_dev(struct pci_dev *);
  84
  85 /*
  86  *      Devices
  87  */
  88
  89 struct pci_dev {
  90   struct pci_dev *next;                 /* Next device in the chain */
  91   word bus;                             /* Higher byte can select host bridges */
  92   byte dev, func;                       /* Device and function */
  93
  94   /* These fields are set by pci_fill_info() */
  95   word vendor_id, device_id;            /* Identity of the device */
  96   int irq;                              /* IRQ number */
  97   unsigned long base_addr[6];           /* Base addresses */
  98   unsigned long rom_base_addr;          /* Expansion ROM base address */
  99
 100   /* Fields used internally: */
 101   struct pci_access *access;
 102   struct pci_methods *methods;
 103   int known_fields;                     /* Set of info fields that is already known */
 104   int hdrtype;                          /* Direct methods: header type */
 105   void *aux;                            /* Auxillary data */
 106 };
 107
 108 byte pci_read_byte(struct pci_dev *, int pos); /* Access to configuration space */
 109 word pci_read_word(struct pci_dev *, int pos);
 110 u32  pci_read_long(struct pci_dev *, int pos);
 111 int pci_read_block(struct pci_dev *, int pos, byte *buf, int len);
 112 int pci_write_byte(struct pci_dev *, int pos, byte data);
 113 int pci_write_word(struct pci_dev *, int pos, word data);
 114 int pci_write_long(struct pci_dev *, int pos, u32 data);
 115 int pci_write_block(struct pci_dev *, int pos, byte *buf, int len);
 116
 117 void pci_fill_info(struct pci_dev *, int flags); /* Fill in device information */
 118
 119 #define PCI_FILL_IDENT          1
 120 #define PCI_FILL_IRQ            2
 121 #define PCI_FILL_BASES          4
 122 #define PCI_FILL_ROM_BASE       8
 123 #define PCI_FILL_RESCAN         0x10000
 124
 125 /*
 126  *      Buffered access
 127  */
 128
 129 void pci_setup_buffer(struct pci_dev *, byte *buf);
 130
 131 /*
 132  *      Filters
 133  */
 134
 135 struct pci_filter {
 136   int bus, slot, func;                  /* -1 = ANY */
 137   int vendor, device;
 138 };
 139
 140 void pci_filter_init(struct pci_access *, struct pci_filter *);
 141 char *pci_filter_parse_slot(struct pci_filter *, char *);
 142 char *pci_filter_parse_id(struct pci_filter *, char *);
 143 int pci_filter_match(struct pci_filter *, struct pci_dev *);
 144
 145 /*
 146  *      Device names
 147  */
 148
 149 char *pci_lookup_name(struct pci_access *a, char *buf, int size, int flags, u32 arg1, u32 arg2);
 150 void pci_free_name_list(struct pci_access *a);
 151
 152 #define PCI_LOOKUP_VENDOR 1
 153 #define PCI_LOOKUP_DEVICE 2
 154 #define PCI_LOOKUP_CLASS 4
 155 #define PCI_LOOKUP_SUBSYSTEM 8
 156 #define PCI_LOOKUP_NUMERIC 0x10000
 157
 158 #endif