pci.h

 
#pragma once
 
#include <common.h>
 
#define CLASS_DEVICE_TOO_OLD 0x00   
#define CLASS_MASS_STORAGE 0x01     
#define CLASS_NETWORK_CTRLR 0x02    
#define CLASS_DISPLAY 0x03          
#define CLASS_MULTIMEDIA 0x04       
#define CLASS_MEMORY 0x05           
#define CLASS_BRIDGE 0x06           
#define CLASS_SCC 0x07              
#define CLASS_SYSTEM 0x08           
#define CLASS_INPUT 0x09            
#define CLASS_DOCK 0x0A             
#define CLASS_PROCESSOR 0x0B        
#define CLASS_SERIAL_BUS 0x0C       
#define CLASS_WIRELESS 0x0D         
#define CLASS_INTELLIGENTIO 0x0E    
#define CLASS_SATELLITE  0x0F       
#define CLASS_ENCRYPT 0x10          
#define CLASS_SIGNAL_PROC 0x11      
#define CLASS_PROC_ACCEL 0x12       
#define CLASS_NO_ESS_INS 0x13       
#define CLASS_CO_CPU 0x40           
 
#define PCI_ADDRESS_PORT 0xCF8      
#define PCI_DATA_PORT 0xCFC         
 
#define PCI_VENDOR_NO_DEVICE 0xFFFF 
 
#define PCI_BAR0 0x10
#define PCI_BAR1 0x14
#define PCI_BAR2 0x18
#define PCI_BAR3 0x1C
#define PCI_BAR4 0x20
#define PCI_BAR5 0x24
 
typedef struct pci_header_t {
    uint16_t vendor_id;             
    uint16_t device_id;             
    uint8_t revision;               
    uint8_t prog_if;                
    uint8_t subclass_id;            
    uint8_t class_id;               
    uint8_t cache_line_size;        
    uint8_t latency_timer;          
    uint8_t hdr_type;               
    uint8_t bist;                   
    uint32_t bar[6];                
    uint32_t cardbus_cis_ptr;       
    uint16_t subsys_vendor;         
    uint16_t subsys_id;             
    uint32_t expansion_rom;         
    uint8_t capatibilities;         
    uint8_t reserved[3];            
    uint32_t reserved2;             
    uint8_t int_line;               
    uint8_t int_pin;                
    uint8_t min_grant;              
    uint8_t max_latency;            
} pci_header_t;
 
typedef struct {
    uint16_t vendor_id;
    uint16_t device_id;
    uint16_t klass;
    uint16_t subclass;
    uint16_t bus;
    uint16_t slot;
    uint16_t func;
    uint16_t hdrtype;
} pci_device_t;
 
uint16_t pci_read_confspc_word(uint8_t bus, uint8_t slot, uint8_t function, uint8_t offset);
uint8_t pci_get_class(uint8_t bus, uint8_t slot, uint8_t function);
uint8_t pci_get_subclass(uint8_t bus, uint8_t slot, uint8_t function);
uint8_t pci_get_hdr_type(uint8_t bus, uint8_t slot, uint8_t function);
uint16_t pci_get_vendor(uint8_t bus, uint8_t slot, uint8_t function);
uint16_t pci_get_device(uint8_t bus, uint8_t slot, uint8_t function);
const char *pci_get_device_type(uint8_t klass, uint8_t subclass);
const char *pci_get_vendor_name(uint16_t vendor);
uint32_t pci_get_bar(uint8_t hdrtype, uint8_t bus, uint8_t slot, uint8_t func, uint8_t bar_number, uint8_t *bar_type);
void pci_find_device(uint16_t vendor, uint16_t device, uint8_t *bus_ret, uint8_t *slot_ret, uint8_t *func_ret);
void pci_print_list();
void pci_write(uint8_t bus, uint8_t slot, uint8_t func, uint32_t offset, uint32_t value);
void pci_find_device_by_class_and_subclass(uint16_t class, uint16_t subclass, uint16_t *vendor_ret, uint16_t *deviceid_ret,
                                      uint8_t *bus_ret, uint8_t *slot_ret, uint8_t *func_ret);
void pci_enable_bus_mastering(uint8_t bus, uint8_t slot, uint8_t func);
uint32_t pci_read32(uint8_t bus, uint8_t slot, uint8_t function, uint8_t offset);
 
void pci_scan_everything();