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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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 *  May 8, 2006 - 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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};
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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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 *  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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              ...);
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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