pci.h

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#ifndef _PCI_DRIVER_H_
#define _PCI_DRIVER_H_

#include "types.h"

#define MAX_DEVICE_COUNT 128
#define MAX_POSSIBLE_BARS 6

#define PCI_MASS_STORAGE_DEVICE_CLASS 0x1

#define PCI_BUS_MASTER_CMD (1<<2)

typedef struct
{
    uint8_t classCode;
    uint8_t subClassCode;
    uint8_t progIf;
    
    uint16_t deviceID;
    uint16_t vendorID;

    uint32_t bus;
    uint32_t device;
    uint32_t function;
    
    uint8_t bar_count;
    uint32_t bars[MAX_POSSIBLE_BARS];
    
    uint8_t headerType;
} PCI_DeviceFuncs;

PCI_DeviceFuncs devices[MAX_DEVICE_COUNT];
uint32_t pci_deviceCount;


void 
pci_writeDWord(
    uint32_t bus,
    uint32_t device,
    uint32_t function,
    uint32_t offset,
    uint32_t val
);


uint32_t 
pci_readDWord(
    uint32_t bus,
    uint32_t device,
    uint32_t function,
    uint32_t offset
);

void 
pci_GetPCIClass (
    long classcode,
    char ** base,
    char ** sub,
    char ** prog
);

void
pci_GetPCIDevice(uint16_t venID,
                 uint16_t devID,
                 char **chip_name,
                 char **chip_desc);


void 
pci_GetPCIVendor(uint16_t venID,
                 char ** short_name,
                 char ** long_name);

void 
pci_Initialize(void);

void 
pci_setCommand(uint32_t device_index, 
               uint16_t value);

#endif /* end of include guard: _PCI_DRIVER_H_ */