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  1. /*
  2.  *  The PCI Library
  3.  *
  4.  *  Copyright (c) 1997--2005 Martin Mares <mj@ucw.cz>
  5.  *
  6.  *  May 8, 2006 - Modified and ported to HelenOS by Jakub Jermar.
  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 "header.h"
  15. #include "types.h"
  16.  
  17. #define PCI_LIB_VERSION 0x020200
  18.  
  19. /*
  20.  *  PCI Access Structure
  21.  */
  22.  
  23. struct pci_methods;
  24.  
  25. enum pci_access_type {
  26.     /* Known access methods, remember to update access.c as well */
  27.     PCI_ACCESS_I386_TYPE1,  /* i386 ports, type 1 (params: none) */
  28.     PCI_ACCESS_I386_TYPE2,  /* i386 ports, type 2 (params: none) */
  29.     PCI_ACCESS_MAX
  30. };
  31.  
  32. struct pci_access {
  33.     /* Options you can change: */
  34.     unsigned int method;    /* Access method */
  35.     char *method_params[PCI_ACCESS_MAX];    /* Parameters for the methods */
  36.     int writeable;      /* Open in read/write mode */
  37.     int buscentric;     /* Bus-centric view of the world */
  38.     int numeric_ids;    /* Don't resolve device IDs to names */
  39.     int debugging;      /* Turn on debugging messages */
  40.  
  41.     /* Functions you can override: */
  42.     void (*error) (char *msg, ...); /* Write error message and quit */
  43.     void (*warning) (char *msg, ...);   /* Write a warning message */
  44.     void (*debug) (char *msg, ...); /* Write a debugging message */
  45.  
  46.     struct pci_dev *devices;    /* Devices found on this bus */
  47.  
  48.     /* Fields used internally: */
  49.     struct pci_methods *methods;
  50.     struct id_entry **id_hash;  /* names.c */
  51.     struct id_bucket *current_id_bucket;
  52.     int fd;         /* proc: fd */
  53.     int fd_rw;      /* proc: fd opened read-write */
  54.     struct pci_dev *cached_dev; /* proc: device the fd is for */
  55.     int fd_pos;     /* proc: current position */
  56. };
  57.  
  58. /* Initialize PCI access */
  59. struct pci_access *pci_alloc(void);
  60. void pci_init(struct pci_access *);
  61. void pci_cleanup(struct pci_access *);
  62.  
  63. /* Scanning of devices */
  64. void pci_scan_bus(struct pci_access *acc);
  65. struct pci_dev *pci_get_dev(struct pci_access *acc, int domain, int bus, int dev, int func);    /* Raw access to specified device */
  66. void pci_free_dev(struct pci_dev *);
  67.  
  68. /*
  69.  *  Devices
  70.  */
  71.  
  72. struct pci_dev {
  73.     struct pci_dev *next;   /* Next device in the chain */
  74.     u16 domain;     /* PCI domain (host bridge) */
  75.     u8 bus, dev, func;  /* Bus inside domain, device and function */
  76.  
  77.     /* These fields are set by pci_fill_info() */
  78.     int known_fields;   /* Set of info fields already known */
  79.     u16 vendor_id, device_id;   /* Identity of the device */
  80.     int irq;        /* IRQ number */
  81.     pciaddr_t base_addr[6]; /* Base addresses */
  82.     pciaddr_t size[6];  /* Region sizes */
  83.     pciaddr_t rom_base_addr;    /* Expansion ROM base address */
  84.     pciaddr_t rom_size; /* Expansion ROM size */
  85.  
  86.     /* Fields used internally: */
  87.     struct pci_access *access;
  88.     struct pci_methods *methods;
  89.     u8 *cache;      /* Cached config registers */
  90.     int cache_len;
  91.     int hdrtype;        /* Cached low 7 bits of header type, -1 if unknown */
  92.     void *aux;      /* Auxillary data */
  93. };
  94.  
  95. #define PCI_ADDR_IO_MASK (~(pciaddr_t) 0x3)
  96. #define PCI_ADDR_MEM_MASK (~(pciaddr_t) 0xf)
  97.  
  98. u8 pci_read_byte(struct pci_dev *, int pos);    /* Access to configuration space */
  99. u16 pci_read_word(struct pci_dev *, int pos);
  100. u32 pci_read_long(struct pci_dev *, int pos);
  101. int pci_read_block(struct pci_dev *, int pos, u8 * buf, int len);
  102. int pci_write_byte(struct pci_dev *, int pos, u8 data);
  103. int pci_write_word(struct pci_dev *, int pos, u16 data);
  104. int pci_write_long(struct pci_dev *, int pos, u32 data);
  105. int pci_write_block(struct pci_dev *, int pos, u8 * buf, int len);
  106.  
  107. int pci_fill_info(struct pci_dev *, int flags); /* Fill in device information */
  108.  
  109. #define PCI_FILL_IDENT      1
  110. #define PCI_FILL_IRQ        2
  111. #define PCI_FILL_BASES      4
  112. #define PCI_FILL_ROM_BASE   8
  113. #define PCI_FILL_SIZES      16
  114. #define PCI_FILL_RESCAN     0x10000
  115.  
  116. void pci_setup_cache(struct pci_dev *, u8 * cache, int len);
  117.  
  118. /*
  119.  *  Filters
  120.  */
  121.  
  122. struct pci_filter {
  123.     int domain, bus, slot, func;    /* -1 = ANY */
  124.     int vendor, device;
  125. };
  126.  
  127. void pci_filter_init(struct pci_access *, struct pci_filter *);
  128. char *pci_filter_parse_slot(struct pci_filter *, char *);
  129. char *pci_filter_parse_id(struct pci_filter *, char *);
  130. int pci_filter_match(struct pci_filter *, struct pci_dev *);
  131.  
  132. /*
  133.  *  Conversion of PCI ID's to names (according to the pci.ids file)
  134.  *
  135.  *  Call pci_lookup_name() to identify different types of ID's:
  136.  *
  137.  *  VENDOR              (vendorID) -> vendor
  138.  *  DEVICE              (vendorID, deviceID) -> device
  139.  *  VENDOR | DEVICE         (vendorID, deviceID) -> combined vendor and device
  140.  *  SUBSYSTEM | VENDOR      (subvendorID) -> subsystem vendor
  141.  *  SUBSYSTEM | DEVICE      (vendorID, deviceID, subvendorID, subdevID) -> subsystem device
  142.  *  SUBSYSTEM | VENDOR | DEVICE (vendorID, deviceID, subvendorID, subdevID) -> combined subsystem v+d
  143.  *  SUBSYSTEM | ...         (-1, -1, subvendorID, subdevID) -> generic subsystem
  144.  *  CLASS               (classID) -> class
  145.  *  PROGIF              (classID, progif) -> programming interface
  146.  */
  147.  
  148. char *pci_lookup_name(struct pci_access *a, char *buf, int size, int flags,
  149.               ...);
  150.  
  151. int pci_load_name_list(struct pci_access *a);   /* Called automatically by pci_lookup_*() when needed; returns success */
  152. void pci_free_name_list(struct pci_access *a);  /* Called automatically by pci_cleanup() */
  153.  
  154. enum pci_lookup_mode {
  155.     PCI_LOOKUP_VENDOR = 1,  /* Vendor name (args: vendorID) */
  156.     PCI_LOOKUP_DEVICE = 2,  /* Device name (args: vendorID, deviceID) */
  157.     PCI_LOOKUP_CLASS = 4,   /* Device class (args: classID) */
  158.     PCI_LOOKUP_SUBSYSTEM = 8,
  159.     PCI_LOOKUP_PROGIF = 16, /* Programming interface (args: classID, prog_if) */
  160.     PCI_LOOKUP_NUMERIC = 0x10000,   /* Want only formatted numbers; default if access->numeric_ids is set */
  161.     PCI_LOOKUP_NO_NUMBERS = 0x20000 /* Return NULL if not found in the database; default is to print numerically */
  162. };
  163.  
  164. #endif
  165.