cregit-Linux how code gets into the kernel

Release 4.12 include/linux/amifdreg.h

Directory: include/linux
#ifndef _LINUX_AMIFDREG_H

#define _LINUX_AMIFDREG_H

/*
** CIAAPRA bits (read only)
*/


#define DSKRDY      (0x1<<5)        
/* disk ready when low */

#define DSKTRACK0   (0x1<<4)        
/* head at track zero when low */

#define DSKPROT     (0x1<<3)        
/* disk protected when low */

#define DSKCHANGE   (0x1<<2)        
/* low when disk removed */

/*
** CIAAPRB bits (read/write)
*/


#define DSKMOTOR    (0x1<<7)        
/* motor on when low */

#define DSKSEL3     (0x1<<6)        
/* select drive 3 when low */

#define DSKSEL2     (0x1<<5)        
/* select drive 2 when low */

#define DSKSEL1     (0x1<<4)        
/* select drive 1 when low */

#define DSKSEL0     (0x1<<3)        
/* select drive 0 when low */

#define DSKSIDE     (0x1<<2)        
/* side selection: 0 = upper, 1 = lower */

#define DSKDIREC    (0x1<<1)        
/* step direction: 0=in, 1=out (to trk 0) */

#define DSKSTEP     (0x1)           
/* pulse low to step head 1 track */

/*
** DSKBYTR bits (read only)
*/


#define DSKBYT      (1<<15)         
/* register contains valid byte when set */

#define DMAON       (1<<14)         
/* disk DMA enabled */

#define DISKWRITE   (1<<13)         
/* disk write bit in DSKLEN enabled */

#define WORDEQUAL   (1<<12)         
/* DSKSYNC register match when true */
/* bits 7-0 are data */

/*
** ADKCON/ADKCONR bits
*/

#ifndef SETCLR

#define ADK_SETCLR      (1<<15)     
/* control bit */
#endif

#define ADK_PRECOMP1    (1<<14)     
/* precompensation selection */

#define ADK_PRECOMP0    (1<<13)     
/* 00=none, 01=140ns, 10=280ns, 11=500ns */

#define ADK_MFMPREC     (1<<12)     
/* 0=GCR precomp., 1=MFM precomp. */

#define ADK_WORDSYNC    (1<<10)     
/* enable DSKSYNC auto DMA */

#define ADK_MSBSYNC     (1<<9)      
/* when 1, enable sync on MSbit (for GCR) */

#define ADK_FAST        (1<<8)      
/* bit cell: 0=2us (GCR), 1=1us (MFM) */
 
/*
** DSKLEN bits
*/


#define DSKLEN_DMAEN    (1<<15)

#define DSKLEN_WRITE    (1<<14)

/*
** INTENA/INTREQ bits
*/


#define DSKINDEX    (0x1<<4)        
/* DSKINDEX bit */

/*
** Misc
*/
 

#define MFM_SYNC    0x4489          
/* standard MFM sync value */

/* Values for FD_COMMAND */

#define FD_RECALIBRATE		0x07	
/* move to track 0 */

#define FD_SEEK			0x0F	
/* seek track */

#define FD_READ			0xE6	
/* read with MT, MFM, SKip deleted */

#define FD_WRITE		0xC5	
/* write with MT, MFM */

#define FD_SENSEI		0x08	
/* Sense Interrupt Status */

#define FD_SPECIFY		0x03	
/* specify HUT etc */

#define FD_FORMAT		0x4D	
/* format one track */

#define FD_VERSION		0x10	
/* get version code */

#define FD_CONFIGURE		0x13	
/* configure FIFO operation */

#define FD_PERPENDICULAR	0x12	
/* perpendicular r/w mode */

#endif /* _LINUX_AMIFDREG_H */

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Directory: include/linux
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