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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. };
  53.  
  54. /* Initialize PCI access */
  55. struct pci_access *pci_alloc(void);
  56. void pci_init(struct pci_access *);
  57. void pci_cleanup(struct pci_access *);
  58.  
  59. /* Scanning of devices */
  60. void pci_scan_bus(struct pci_access *acc);
  61. struct pci_dev *pci_get_dev(struct pci_access *acc, int domain, int bus, int dev, int func);    /* Raw access to specified device */
  62. void pci_free_dev(struct pci_dev *);
  63.  
  64. /*
  65.  *  Devices
  66.  */
  67.  
  68. struct pci_dev {
  69.     struct pci_dev *next;   /* Next device in the chain */
  70.     u16 domain;     /* PCI domain (host bridge) */
  71.     u8 bus, dev, func;  /* Bus inside domain, device and function */
  72.  
  73.     /* These fields are set by pci_fill_info() */
  74.     int known_fields;   /* Set of info fields already known */
  75.     u16 vendor_id, device_id;   /* Identity of the device */
  76.     int irq;        /* IRQ number */
  77.     pciaddr_t base_addr[6]; /* Base addresses */
  78.     pciaddr_t size[6];  /* Region sizes */
  79.     pciaddr_t rom_base_addr;    /* Expansion ROM base address */
  80.     pciaddr_t rom_size; /* Expansion ROM size */
  81.  
  82.     /* Fields used internally: */
  83.     struct pci_access *access;
  84.     struct pci_methods *methods;
  85.     u8 *cache;      /* Cached config registers */
  86.     int cache_len;
  87.     int hdrtype;        /* Cached low 7 bits of header type, -1 if unknown */
  88.     void *aux;      /* Auxillary data */
  89. };
  90.  
  91. #define PCI_ADDR_IO_MASK (~(pciaddr_t) 0x3)
  92. #define PCI_ADDR_MEM_MASK (~(pciaddr_t) 0xf)
  93.  
  94. u8 pci_read_byte(struct pci_dev *, int pos);    /* Access to configuration space */
  95. u16 pci_read_word(struct pci_dev *, int pos);
  96. u32 pci_read_long(struct pci_dev *, int pos);
  97. int pci_read_block(struct pci_dev *, int pos, u8 * buf, int len);
  98. int pci_write_byte(struct pci_dev *, int pos, u8 data);
  99. int pci_write_word(struct pci_dev *, int pos, u16 data);
  100. int pci_write_long(struct pci_dev *, int pos, u32 data);
  101. int pci_write_block(struct pci_dev *, int pos, u8 * buf, int len);
  102.  
  103. int pci_fill_info(struct pci_dev *, int flags); /* Fill in device information */
  104.  
  105. #define PCI_FILL_IDENT      1
  106. #define PCI_FILL_IRQ        2
  107. #define PCI_FILL_BASES      4
  108. #define PCI_FILL_ROM_BASE   8
  109. #define PCI_FILL_SIZES      16
  110. #define PCI_FILL_RESCAN     0x10000
  111.  
  112. void pci_setup_cache(struct pci_dev *, u8 * cache, int len);
  113.  
  114. /*
  115.  *  Conversion of PCI ID's to names (according to the pci.ids file)
  116.  *
  117.  *  Call pci_lookup_name() to identify different types of ID's:
  118.  *
  119.  *  VENDOR              (vendorID) -> vendor
  120.  *  DEVICE              (vendorID, deviceID) -> device
  121.  *  VENDOR | DEVICE         (vendorID, deviceID) -> combined vendor and device
  122.  *  SUBSYSTEM | VENDOR      (subvendorID) -> subsystem vendor
  123.  *  SUBSYSTEM | DEVICE      (vendorID, deviceID, subvendorID, subdevID) -> subsystem device
  124.  *  SUBSYSTEM | VENDOR | DEVICE (vendorID, deviceID, subvendorID, subdevID) -> combined subsystem v+d
  125.  *  SUBSYSTEM | ...         (-1, -1, subvendorID, subdevID) -> generic subsystem
  126.  *  CLASS               (classID) -> class
  127.  *  PROGIF              (classID, progif) -> programming interface
  128.  */
  129.  
  130. char *pci_lookup_name(struct pci_access *a, char *buf, int size, int flags,
  131.               ...);
  132.  
  133. int pci_load_name_list(struct pci_access *a);   /* Called automatically by pci_lookup_*() when needed; returns success */
  134. void pci_free_name_list(struct pci_access *a);  /* Called automatically by pci_cleanup() */
  135.  
  136. enum pci_lookup_mode {
  137.     PCI_LOOKUP_VENDOR = 1,  /* Vendor name (args: vendorID) */
  138.     PCI_LOOKUP_DEVICE = 2,  /* Device name (args: vendorID, deviceID) */
  139.     PCI_LOOKUP_CLASS = 4,   /* Device class (args: classID) */
  140.     PCI_LOOKUP_SUBSYSTEM = 8,
  141.     PCI_LOOKUP_PROGIF = 16, /* Programming interface (args: classID, prog_if) */
  142.     PCI_LOOKUP_NUMERIC = 0x10000,   /* Want only formatted numbers; default if access->numeric_ids is set */
  143.     PCI_LOOKUP_NO_NUMBERS = 0x20000 /* Return NULL if not found in the database; default is to print numerically */
  144. };
  145.  
  146. #endif
  147.