pci.h

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// MIT License
//
// Copyright (c) 2026 Christian Spoo
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
 
#ifndef _MINIOS_DRIVERS_PCI_H_
#define _MINIOS_DRIVERS_PCI_H_

 
#include <miniOS/types.h>

#define PCI_MAX_DEVICES 64

typedef struct {
    uint8_t  bus;             
    uint8_t  dev;             
    uint8_t  fn;              
    uint16_t vendor_id;       
    uint16_t device_id;       
    uint8_t  class_code;      
    uint8_t  subclass;        
    uint8_t  prog_if;         
    uint8_t  revision_id;     
    uint16_t subsys_vendor;   
    uint16_t subsys_device;   
    uint8_t  irq_line;        
    uint8_t  irq_pin;         
    uint32_t bar[6];          
    uint8_t  header_type;     
} pci_device_t;

extern pci_device_t pci_devices[PCI_MAX_DEVICES];

extern int pci_device_count;

void pci_init(void);

uint32_t pci_config_read32(uint8_t bus, uint8_t dev, uint8_t fn, uint8_t off);

void pci_config_write32(uint8_t bus, uint8_t dev, uint8_t fn, uint8_t off, uint32_t val);
 
#endif /* _MINIOS_DRIVERS_PCI_H_ */