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/*

 *      seagate.h Copyright (C) 1992 Drew Eckhardt

 *      low level scsi driver header for ST01/ST02 by

 *              Drew Eckhardt

 *

 *      <drew@colorado.edu>

 */

#ifndef _SEAGATE_H

        #define SEAGATE_H

/*

        $Header

*/

#ifndef ASM

int seagate_st0x_detect(Scsi_Host_Template *);

int seagate_st0x_command(Scsi_Cmnd *);

int seagate_st0x_queue_command(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));

int seagate_st0x_abort(Scsi_Cmnd *);

const char *seagate_st0x_info(struct Scsi_Host *);

int seagate_st0x_reset(Scsi_Cmnd *, unsigned int);

int seagate_st0x_proc_info(char *,char **,off_t,int,int,int);

#ifndef NULL

        #define NULL 0

#endif

#include <linux/kdev_t.h>

int seagate_st0x_biosparam(Disk *, kdev_t, int*);

#define SEAGATE_ST0X  {  NULL, NULL, NULL, seagate_st0x_proc_info, \

                         NULL, seagate_st0x_detect,     \

                         NULL,                                          \

                         seagate_st0x_info, seagate_st0x_command,       \

                         seagate_st0x_queue_command, seagate_st0x_abort, \

                         seagate_st0x_reset, NULL, seagate_st0x_biosparam, \

                         1, 7, SG_ALL, 1, 0, 0, DISABLE_CLUSTERING}

#endif

/*

        defining PARITY causes parity data to be checked

*/

#define PARITY

/*

        Thanks to Brian Antoine for the example code in his Messy-Loss ST-01

                driver, and Mitsugu Suzuki for information on the ST-01

                SCSI host.

*/

/*

        CONTROL defines

*/

#define CMD_RST                 0x01

#define CMD_SEL                 0x02

#define CMD_BSY                 0x04

#define CMD_ATTN                0x08

#define CMD_START_ARB           0x10

#define CMD_EN_PARITY           0x20

#define CMD_INTR                0x40

#define CMD_DRVR_ENABLE         0x80

/*

        STATUS

*/

#define STAT_BSY                0x01

#define STAT_MSG                0x02

#define STAT_IO                 0x04

#define STAT_CD                 0x08

#define STAT_REQ                0x10

#define STAT_SEL                0x20

#define STAT_PARITY             0x40

#define STAT_ARB_CMPL           0x80

/*

        REQUESTS

*/

#define REQ_MASK (STAT_CD |  STAT_IO | STAT_MSG)

#define REQ_DATAOUT 0

#define REQ_DATAIN STAT_IO

#define REQ_CMDOUT STAT_CD

#define REQ_STATIN (STAT_CD | STAT_IO)

#define REQ_MSGOUT (STAT_MSG | STAT_CD)

#define REQ_MSGIN (STAT_MSG | STAT_CD | STAT_IO)

extern volatile int seagate_st0x_timeout;

#ifdef PARITY

        #define BASE_CMD CMD_EN_PARITY

#else

        #define BASE_CMD  0

#endif

/*

        Debugging code

*/

#define PHASE_BUS_FREE 1

#define PHASE_ARBITRATION 2

#define PHASE_SELECTION 4

#define PHASE_DATAIN 8 

#define PHASE_DATAOUT 0x10

#define PHASE_CMDOUT 0x20

#define PHASE_MSGIN 0x40

#define PHASE_MSGOUT 0x80

#define PHASE_STATUSIN 0x100

#define PHASE_ETC (PHASE_DATAIN | PHASE_DATA_OUT | PHASE_CMDOUT | PHASE_MSGIN | PHASE_MSGOUT | PHASE_STATUSIN)

#define PRINT_COMMAND 0x200

#define PHASE_EXIT 0x400

#define PHASE_RESELECT 0x800

#define DEBUG_FAST 0x1000

#define DEBUG_SG   0x2000

#define DEBUG_LINKED    0x4000

#define DEBUG_BORKEN    0x8000

/*

 *      Control options - these are timeouts specified in .01 seconds.

 */

/* 30, 20 work */

#define ST0X_BUS_FREE_DELAY 25

#define ST0X_SELECTION_DELAY 25

#define eoi() __asm__("push %%eax\nmovb $0x20, %%al\noutb %%al, $0x20\npop %%eax"::)

#define SEAGATE 1       /* these determine the type of the controller */

#define FD      2

#define ST0X_ID_STR     "Seagate ST-01/ST-02"

#define FD_ID_STR       "TMC-8XX/TMC-950"

#endif