www.pudn.com > canbus.rar > directio.h

/*  leddrv.h - the header file with the ioctl definitions. 
 * 
 *  The declarations here have to be in a header file, because 
 *  they need to be known both to the kernel module 
 *  (in leddrv.c) and the process calling ioctl (ioctl.c) 
 */ 
 
#ifndef LED_DRV_H 
#define LED_DRV_H 
 
#include  
 
 
/* The major device number. We can't rely on dynamic  
 * registration any more, because ioctls need to know  
 * it. */ 
#define MAJOR_NUMM 199 
 
 
/* Set the message of the device driver */ 
//#define IOCTL_SET_MSG _IOR(MAJOR_NUMM, 0, int*) 
/* _IOR means that we're creating an ioctl command  
 * number for passing information from a user process 
 * to the kernel module.  
 * 
 * The first arguments, MAJOR_NUM, is the major device  
 * number we're using. 
 * 
 * The second argument is the number of the command  
 * (there could be several with different meanings). 
 * 
 * The third argument is the type we want to get from  
 * the process to the kernel. 
 */ 
 
/* Get the message of the device driver */ 
//#define IOCTL_GET_MSG _IOR(MAJOR_NUMM, 1, int*) 
 /* This IOCTL is used for output, to get the message  
  * of the device driver. However, we still need the  
  * buffer to place the message in to be input,  
  * as it is allocated by the process. 
  */ 
 
/* The name of the device file */ 
#define DEVICE_FILE_NAME "directio" 
 
/* port data structure */ 
/* command received */ 
#define CMD_PORT      0 
#define CMD_IRQ       1 
 
/* byte sex */ 
#define PORT_BYTE     0 
#define PORT_HWORD    1 
#define PORT_WORD     2 
typedef struct port_data{ 
    int          cmd;         /* command */ 
 
    /* CMD_PORT */ 
    unsigned int startaddr;   /* start addr */ 
    int          nums;        /* ports nums(bytes) */ 
    int          opts;  /* 0 - bytes opt 
                         * 1 - half word opt 
                         * 2 - word opt */ 
    int          value;      /* port value */ 
}port_data; 
 
/* port access functions */ 
int port_init(void); 
int port_outb(unsigned int , unsigned char ); 
int port_outw(unsigned int , unsigned short ); 
int port_outl(unsigned int , unsigned int ); 
unsigned char port_inb(unsigned int ); 
unsigned short port_inw(unsigned int ); 
unsigned int port_inl(unsigned int ); 
void port_uninit(void); 
#endif