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#ifndef _LINUX_XD_H

#define _LINUX_XD_H

/*

 * This file contains the definitions for the IO ports and errors etc. for XT hard disk controllers (at least the DTC 5150X).

 *

 * Author: Pat Mackinlay, pat@it.com.au

 * Date: 29/09/92

 *

 * Revised: 01/01/93, ...

 *

 * Ref: DTC 5150X Controller Specification (thanks to Kevin Fowler, kevinf@agora.rain.com)

 * Also thanks to: Salvador Abreu, Dave Thaler, Risto Kankkunen and Wim Van Dorst.

 */

/* XT hard disk controller registers */

#define XD_DATA         (xd_iobase + 0x00)      /* data RW register */

#define XD_RESET        (xd_iobase + 0x01)      /* reset WO register */

#define XD_STATUS       (xd_iobase + 0x01)      /* status RO register */

#define XD_SELECT       (xd_iobase + 0x02)      /* select WO register */

#define XD_JUMPER       (xd_iobase + 0x02)      /* jumper RO register */

#define XD_CONTROL      (xd_iobase + 0x03)      /* DMAE/INTE WO register */

#define XD_RESERVED     (xd_iobase + 0x03)      /* reserved */

/* XT hard disk controller commands (incomplete list) */

#define CMD_TESTREADY   0x00    /* test drive ready */

#define CMD_RECALIBRATE 0x01    /* recalibrate drive */

#define CMD_SENSE       0x03    /* request sense */

#define CMD_FORMATDRV   0x04    /* format drive */

#define CMD_VERIFY      0x05    /* read verify */

#define CMD_FORMATTRK   0x06    /* format track */

#define CMD_FORMATBAD   0x07    /* format bad track */

#define CMD_READ        0x08    /* read */

#define CMD_WRITE       0x0A    /* write */

#define CMD_SEEK        0x0B    /* seek */

/* Controller specific commands */

#define CMD_DTCSETPARAM 0x0C    /* set drive parameters (DTC 5150X & CX only?) */

#define CMD_DTCGETECC   0x0D    /* get ecc error length (DTC 5150X only?) */

#define CMD_DTCREADBUF  0x0E    /* read sector buffer (DTC 5150X only?) */

#define CMD_DTCWRITEBUF 0x0F    /* write sector buffer (DTC 5150X only?) */

#define CMD_DTCREMAPTRK 0x11    /* assign alternate track (DTC 5150X only?) */

#define CMD_DTCGETPARAM 0xFB    /* get drive parameters (DTC 5150X only?) */

#define CMD_DTCSETSTEP  0xFC    /* set step rate (DTC 5150X only?) */

#define CMD_DTCSETGEOM  0xFE    /* set geometry data (DTC 5150X only?) */

#define CMD_DTCGETGEOM  0xFF    /* get geometry data (DTC 5150X only?) */

#define CMD_ST11GETGEOM 0xF8    /* get geometry data (Seagate ST11R/M only?) */

#define CMD_WDSETPARAM  0x0C    /* set drive parameters (WD 1004A27X only?) */

#define CMD_XBSETPARAM  0x0C    /* set drive parameters (XEBEC only?) */

/* Bits for command status byte */

#define CSB_ERROR       0x02    /* error */

#define CSB_LUN         0x20    /* logical Unit Number */

/* XT hard disk controller status bits */

#define STAT_READY      0x01    /* controller is ready */

#define STAT_INPUT      0x02    /* data flowing from controller to host */

#define STAT_COMMAND    0x04    /* controller in command phase */

#define STAT_SELECT     0x08    /* controller is selected */

#define STAT_REQUEST    0x10    /* controller requesting data */

#define STAT_INTERRUPT  0x20    /* controller requesting interrupt */

/* XT hard disk controller control bits */

#define PIO_MODE        0x00    /* control bits to set for PIO */

#define DMA_MODE        0x03    /* control bits to set for DMA & interrupt */

#define XD_MAXDRIVES    2       /* maximum 2 drives */

#define XD_TIMEOUT      HZ      /* 1 second timeout */

#define XD_RETRIES      4       /* maximum 4 retries */

#undef DEBUG                    /* define for debugging output */

#ifdef DEBUG

        #define DEBUG_STARTUP   /* debug driver initialisation */

        #define DEBUG_OVERRIDE  /* debug override geometry detection */

        #define DEBUG_READWRITE /* debug each read/write command */

        #define DEBUG_OTHER     /* debug misc. interrupt/DMA stuff */

        #define DEBUG_COMMAND   /* debug each controller command */

#endif /* DEBUG */

/* this structure defines the XT drives and their types */

typedef struct {

        u8 heads;

        u16 cylinders;

        u8 sectors;

        u8 control;

} XD_INFO;

/* this structure is returned to the HDIO_GETGEO ioctl */

typedef struct {

        __u8 heads;

        __u8 sectors;

        __u8 cylinders;

        __u32 start;

} XD_GEOMETRY;

/* this structure defines a ROM BIOS signature */

typedef struct {

        unsigned int offset;

        const char *string;

        void (*init_controller)(unsigned int address);

        void (*init_drive)(u8 drive);

        const char *name;

} XD_SIGNATURE;

#ifndef MODULE

static int xd_manual_geo_init (char *command);

#endif /* MODULE */

static u8 xd_detect (u8 *controller, unsigned int *address);

static u8 xd_initdrives (void (*init_drive)(u8 drive));

static void xd_geninit (void);

static int xd_open (struct inode *inode,struct file *file);

static void do_xd_request (request_queue_t * q);

static int xd_ioctl (struct inode *inode,struct file *file,unsigned int cmd,unsigned long arg);

static int xd_release (struct inode *inode,struct file *file);

static int xd_reread_partitions (kdev_t dev);

static int xd_readwrite (u8 operation,u8 drive,char *buffer,u_int block,u_int count);

static void xd_recalibrate (u8 drive);

static void xd_interrupt_handler (int irq, void *dev_id, struct pt_regs *regs);

static u8 xd_setup_dma (u8 opcode,u8 *buffer,u_int count);

static u8 *xd_build (u8 *cmdblk,u8 command,u8 drive,u8 head,u16 cylinder,u8 sector,u8 count,u8 control);

static void xd_watchdog (unsigned long unused);

static inline u8 xd_waitport (u16 port,u8 flags,u8 mask,unsigned long timeout);

static u_int xd_command (u8 *command,u8 mode,u8 *indata,u8 *outdata,u8 *sense,unsigned long timeout);

/* card specific setup and geometry gathering code */

static void xd_dtc_init_controller (unsigned int address);

static void xd_dtc5150cx_init_drive (u8 drive);

static void xd_dtc_init_drive (u8 drive);

static void xd_wd_init_controller (unsigned int address);

static void xd_wd_init_drive (u8 drive);

static void xd_seagate_init_controller (unsigned int address);

static void xd_seagate_init_drive (u8 drive);

static void xd_omti_init_controller (unsigned int address);

static void xd_omti_init_drive (u8 drive);

static void xd_xebec_init_controller (unsigned int address);

static void xd_xebec_init_drive (u8 drive);

static void xd_setparam (u8 command,u8 drive,u8 heads,u16 cylinders,u16 rwrite,u16 wprecomp,u8 ecc);

static void xd_override_init_drive (u8 drive);

#endif /* _LINUX_XD_H */