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1301 jermar 1
/*
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 *  The PCI Library
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 *
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 *  Copyright (c) 1997--2005 Martin Mares <mj@ucw.cz>
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 *
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 *  Modified and ported to HelenOS by Jakub Jermar.
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 *
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 *  Can be freely distributed and used under the terms of the GNU GPL.
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 */
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#ifndef _PCI_LIB_H
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#define _PCI_LIB_H
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#include "header.h"
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#include "types.h"
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#define PCI_LIB_VERSION 0x020200
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/*
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 *  PCI Access Structure
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 */
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struct pci_methods;
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enum pci_access_type {
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  /* Known access methods, remember to update access.c as well */
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  PCI_ACCESS_I386_TYPE1,        /* i386 ports, type 1 (params: none) */
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  PCI_ACCESS_I386_TYPE2,        /* i386 ports, type 2 (params: none) */
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  PCI_ACCESS_MAX
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};
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struct pci_access {
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  /* Options you can change: */
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  unsigned int method;          /* Access method */
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  char *method_params[PCI_ACCESS_MAX];  /* Parameters for the methods */
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  int writeable;            /* Open in read/write mode */
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  int buscentric;           /* Bus-centric view of the world */
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  int numeric_ids;          /* Don't resolve device IDs to names */
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  int debugging;            /* Turn on debugging messages */
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  /* Functions you can override: */
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  void (*error)(char *msg, ...);    /* Write error message and quit */
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  void (*warning)(char *msg, ...);  /* Write a warning message */
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  void (*debug)(char *msg, ...);    /* Write a debugging message */
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  struct pci_dev *devices;      /* Devices found on this bus */
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  /* Fields used internally: */
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  struct pci_methods *methods;
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  struct id_entry **id_hash;        /* names.c */
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  struct id_bucket *current_id_bucket;
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  int fd;               /* proc: fd */
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  int fd_rw;                /* proc: fd opened read-write */
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  struct pci_dev *cached_dev;       /* proc: device the fd is for */
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  int fd_pos;               /* proc: current position */
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};
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/* Initialize PCI access */
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struct pci_access *pci_alloc(void);
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void pci_init(struct pci_access *);
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void pci_cleanup(struct pci_access *);
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/* Scanning of devices */
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void pci_scan_bus(struct pci_access *acc);
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struct pci_dev *pci_get_dev(struct pci_access *acc, int domain, int bus, int dev, int func); /* Raw access to specified device */
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void pci_free_dev(struct pci_dev *);
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/*
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 *  Devices
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 */
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struct pci_dev {
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  struct pci_dev *next;         /* Next device in the chain */
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  u16 domain;               /* PCI domain (host bridge) */
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  u8 bus, dev, func;            /* Bus inside domain, device and function */
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  /* These fields are set by pci_fill_info() */
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  int known_fields;         /* Set of info fields already known */
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  u16 vendor_id, device_id;     /* Identity of the device */
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  int irq;              /* IRQ number */
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  pciaddr_t base_addr[6];       /* Base addresses */
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  pciaddr_t size[6];            /* Region sizes */
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  pciaddr_t rom_base_addr;      /* Expansion ROM base address */
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  pciaddr_t rom_size;           /* Expansion ROM size */
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  /* Fields used internally: */
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  struct pci_access *access;
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  struct pci_methods *methods;
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  u8 *cache;                /* Cached config registers */
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  int cache_len;
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  int hdrtype;              /* Cached low 7 bits of header type, -1 if unknown */
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  void *aux;                /* Auxillary data */
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};
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#define PCI_ADDR_IO_MASK (~(pciaddr_t) 0x3)
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#define PCI_ADDR_MEM_MASK (~(pciaddr_t) 0xf)
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u8 pci_read_byte(struct pci_dev *, int pos); /* Access to configuration space */
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u16 pci_read_word(struct pci_dev *, int pos);
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u32  pci_read_long(struct pci_dev *, int pos);
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int pci_read_block(struct pci_dev *, int pos, u8 *buf, int len);
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int pci_write_byte(struct pci_dev *, int pos, u8 data);
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int pci_write_word(struct pci_dev *, int pos, u16 data);
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int pci_write_long(struct pci_dev *, int pos, u32 data);
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int pci_write_block(struct pci_dev *, int pos, u8 *buf, int len);
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int pci_fill_info(struct pci_dev *, int flags); /* Fill in device information */
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#define PCI_FILL_IDENT      1
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#define PCI_FILL_IRQ        2
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#define PCI_FILL_BASES      4
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#define PCI_FILL_ROM_BASE   8
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#define PCI_FILL_SIZES      16
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#define PCI_FILL_RESCAN     0x10000
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void pci_setup_cache(struct pci_dev *, u8 *cache, int len);
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/*
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 *  Filters
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 */
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struct pci_filter {
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  int domain, bus, slot, func;          /* -1 = ANY */
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  int vendor, device;
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};
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void pci_filter_init(struct pci_access *, struct pci_filter *);
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char *pci_filter_parse_slot(struct pci_filter *, char *);
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char *pci_filter_parse_id(struct pci_filter *, char *);
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int pci_filter_match(struct pci_filter *, struct pci_dev *);
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/*
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 *  Conversion of PCI ID's to names (according to the pci.ids file)
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 *
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 *  Call pci_lookup_name() to identify different types of ID's:
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 *
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 *  VENDOR              (vendorID) -> vendor
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 *  DEVICE              (vendorID, deviceID) -> device
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 *  VENDOR | DEVICE         (vendorID, deviceID) -> combined vendor and device
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 *  SUBSYSTEM | VENDOR      (subvendorID) -> subsystem vendor
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 *  SUBSYSTEM | DEVICE      (vendorID, deviceID, subvendorID, subdevID) -> subsystem device
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 *  SUBSYSTEM | VENDOR | DEVICE (vendorID, deviceID, subvendorID, subdevID) -> combined subsystem v+d
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 *  SUBSYSTEM | ...         (-1, -1, subvendorID, subdevID) -> generic subsystem
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 *  CLASS               (classID) -> class
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 *  PROGIF              (classID, progif) -> programming interface
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 */
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char *pci_lookup_name(struct pci_access *a, char *buf, int size, int flags, ...);
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int pci_load_name_list(struct pci_access *a);   /* Called automatically by pci_lookup_*() when needed; returns success */
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void pci_free_name_list(struct pci_access *a);  /* Called automatically by pci_cleanup() */
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enum pci_lookup_mode {
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  PCI_LOOKUP_VENDOR = 1,        /* Vendor name (args: vendorID) */
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  PCI_LOOKUP_DEVICE = 2,        /* Device name (args: vendorID, deviceID) */
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  PCI_LOOKUP_CLASS = 4,         /* Device class (args: classID) */
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  PCI_LOOKUP_SUBSYSTEM = 8,
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  PCI_LOOKUP_PROGIF = 16,       /* Programming interface (args: classID, prog_if) */
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  PCI_LOOKUP_NUMERIC = 0x10000,     /* Want only formatted numbers; default if access->numeric_ids is set */
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  PCI_LOOKUP_NO_NUMBERS = 0x20000   /* Return NULL if not found in the database; default is to print numerically */
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};
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#endif