#ifndef _AHA152X_H
#define _AHA152X_H

/*
 * $Id: aha152x.h,v 1.7 1997/01/19 23:07:11 davem Exp $
 */

#if defined(__KERNEL__)

#include <linux/blk.h>
#include "scsi.h"
#include <asm/io.h>

int aha152x_detect(Scsi_Host_Template *);
int aha152x_command(Scsi_Cmnd *);
int aha152x_queue(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
int aha152x_abort(Scsi_Cmnd *);
int aha152x_reset(Scsi_Cmnd *, unsigned int);
int aha152x_biosparam(Disk *, kdev_t, int*);
int aha152x_proc_info(char *buffer, char **start, off_t offset, int length, int hostno, int inout);

/* number of queueable commands
   (unless we support more than 1 cmd_per_lun this should do) */
#define AHA152X_MAXQUEUE 7

#define AHA152X_REVID "Adaptec 152x SCSI driver; $Revision: 1.7 $"

extern struct proc_dir_entry proc_scsi_aha152x;

/* Initial value of Scsi_Host entry */
#define AHA152X { proc_dir:           &proc_scsi_aha152x, \
                  proc_info:          aha152x_proc_info,  \
                  name:               AHA152X_REVID,	  \
                  detect:             aha152x_detect,	  \
                  command:	      aha152x_command,	  \
                  queuecommand:       aha152x_queue,	  \
                  abort:              aha152x_abort,	  \
                  reset:              aha152x_reset,	  \
                  slave_attach:       0,		  \
                  bios_param:         aha152x_biosparam,  \
                  can_queue:          1,		  \
                  this_id:            7,		  \
                  sg_tablesize:       SG_ALL,		  \
                  cmd_per_lun:        1,		  \
                  present:            0,		  \
                  unchecked_isa_dma:  0,		  \
                  use_clustering:     DISABLE_CLUSTERING }
#endif


/* port addresses */
#define SCSISEQ      (shpnt->io_port+0x00)    /* SCSI sequence control */
#define SXFRCTL0     (shpnt->io_port+0x01)    /* SCSI transfer control 0 */
#define SXFRCTL1     (shpnt->io_port+0x02)    /* SCSI transfer control 1 */
#define SCSISIG      (shpnt->io_port+0x03)    /* SCSI signal in/out */
#define SCSIRATE     (shpnt->io_port+0x04)    /* SCSI rate control */
#define SELID        (shpnt->io_port+0x05)    /* selection/reselection ID */
#define SCSIID       SELID                    /* SCSI ID */
#define SCSIDAT      (shpnt->io_port+0x06)    /* SCSI latched data */
#define SCSIBUS      (shpnt->io_port+0x07)    /* SCSI data bus */
#define STCNT0       (shpnt->io_port+0x08)    /* SCSI transfer count 0 */
#define STCNT1       (shpnt->io_port+0x09)    /* SCSI transfer count 1 */
#define STCNT2       (shpnt->io_port+0x0a)    /* SCSI transfer count 2 */
#define SSTAT0       (shpnt->io_port+0x0b)    /* SCSI interrupt status 0 */
#define SSTAT1       (shpnt->io_port+0x0c)    /* SCSI interrupt status 1 */
#define SSTAT2       (shpnt->io_port+0x0d)    /* SCSI interrupt status 2 */
#define SCSITEST     (shpnt->io_port+0x0e)    /* SCSI test control */
#define SSTAT3       SCSITEST                 /* SCSI interrupt status 3 */
#define SSTAT4       (shpnt->io_port+0x0f)    /* SCSI status 4 */
#define SIMODE0      (shpnt->io_port+0x10)    /* SCSI interrupt mode 0 */
#define SIMODE1      (shpnt->io_port+0x11)    /* SCSI interrupt mode 1 */
#define DMACNTRL0    (shpnt->io_port+0x12)    /* DMA control 0 */
#define DMACNTRL1    (shpnt->io_port+0x13)    /* DMA control 1 */
#define DMASTAT      (shpnt->io_port+0x14)    /* DMA status */
#define FIFOSTAT     (shpnt->io_port+0x15)    /* FIFO status */
#define DATAPORT     (shpnt->io_port+0x16)    /* DATA port */
#define BRSTCNTRL    (shpnt->io_port+0x18)    /* burst control */
#define PORTA        (shpnt->io_port+0x1a)    /* PORT A */
#define PORTB        (shpnt->io_port+0x1b)    /* PORT B */
#define REV          (shpnt->io_port+0x1c)    /* revision */
#define STACK        (shpnt->io_port+0x1d)    /* stack */
#define TEST         (shpnt->io_port+0x1e)    /* test register */

/* used in aha152x_porttest */
#define O_PORTA      0x1a                    /* PORT A */
#define O_PORTB      0x1b                    /* PORT B */
#define O_DMACNTRL1  0x13                    /* DMA control 1 */
#define O_STACK      0x1d                    /* stack */
#define IO_RANGE     0x20

/* bits and bitmasks to ports */

/* SCSI sequence control */
#define TEMODEO      0x80
#define ENSELO       0x40
#define ENSELI       0x20
#define ENRESELI     0x10
#define ENAUTOATNO   0x08
#define ENAUTOATNI   0x04
#define ENAUTOATNP   0x02
#define SCSIRSTO     0x01

/* SCSI transfer control 0 */
#define SCSIEN       0x80
#define DMAEN        0x40
#define CH1          0x20
#define CLRSTCNT     0x10
#define SPIOEN       0x08
#define CLRCH1       0x02

/* SCSI transfer control 1 */
#define BITBUCKET    0x80
#define SWRAPEN      0x40
#define ENSPCHK      0x20
#define STIMESEL     0x18    /* mask */
#define STIMESEL_    3
#define ENSTIMER     0x04
#define BYTEALIGN    0x02

/* SCSI signal IN */
#define CDI          0x80
#define IOI          0x40
#define MSGI         0x20
#define ATNI         0x10
#define SELI         0x08
#define BSYI         0x04
#define REQI         0x02
#define ACKI         0x01

/* SCSI Phases */
#define P_MASK       (MSGI|CDI|IOI)
#define P_DATAO      (0)
#define P_DATAI      (IOI)
#define P_CMD        (CDI)
#define P_STATUS     (CDI|IOI)
#define P_MSGO       (MSGI|CDI)
#define P_MSGI       (MSGI|CDI|IOI)

/* SCSI signal OUT */
#define CDO          0x80
#define IOO          0x40
#define MSGO         0x20
#define ATNO         0x10
#define SELO         0x08
#define BSYO         0x04
#define REQO         0x02
#define ACKO         0x01

/* SCSI rate control */
#define SXFR         0x70    /* mask */
#define SXFR_        4
#define SOFS         0x0f    /* mask */

/* SCSI ID */
#define OID          0x70
#define OID_         4
#define TID          0x07

/* SCSI transfer count */
#define GETSTCNT() ( (GETPORT(STCNT2)<<16) \
                   + (GETPORT(STCNT1)<< 8) \
                   + GETPORT(STCNT0) )

#define SETSTCNT(X) { SETPORT(STCNT2, ((X) & 0xFF0000) >> 16); \
                      SETPORT(STCNT1, ((X) & 0x00FF00) >>  8); \
                      SETPORT(STCNT0, ((X) & 0x0000FF) ); }

/* SCSI interrupt status */
#define TARGET       0x80
#define SELDO        0x40
#define SELDI        0x20
#define SELINGO      0x10
#define SWRAP        0x08
#define SDONE        0x04
#define SPIORDY      0x02
#define DMADONE      0x01

#define SETSDONE     0x80
#define CLRSELDO     0x40
#define CLRSELDI     0x20
#define CLRSELINGO   0x10
#define CLRSWRAP     0x08
#define CLRSDONE     0x04
#define CLRSPIORDY   0x02
#define CLRDMADONE   0x01

/* SCSI status 1 */
#define SELTO        0x80
#define ATNTARG      0x40
#define SCSIRSTI     0x20
#define PHASEMIS     0x10
#define BUSFREE      0x08
#define SCSIPERR     0x04
#define PHASECHG     0x02
#define REQINIT      0x01

#define CLRSELTIMO   0x80
#define CLRATNO      0x40
#define CLRSCSIRSTI  0x20
#define CLRBUSFREE   0x08
#define CLRSCSIPERR  0x04
#define CLRPHASECHG  0x02
#define CLRREQINIT   0x01

/* SCSI status 2 */
#define SOFFSET      0x20
#define SEMPTY       0x10
#define SFULL        0x08
#define SFCNT        0x07    /* mask */

/* SCSI status 3 */
#define SCSICNT      0xf0    /* mask */
#define SCSICNT_     4
#define OFFCNT       0x0f    /* mask */

/* SCSI TEST control */
#define SCTESTU      0x08
#define SCTESTD      0x04
#define STCTEST      0x01

/* SCSI status 4 */
#define SYNCERR      0x04
#define FWERR        0x02
#define FRERR        0x01

#define CLRSYNCERR   0x04
#define CLRFWERR     0x02
#define CLRFRERR     0x01

/* SCSI interrupt mode 0 */
#define ENSELDO      0x40
#define ENSELDI      0x20
#define ENSELINGO    0x10
#define ENSWRAP      0x08
#define ENSDONE      0x04
#define ENSPIORDY    0x02
#define ENDMADONE    0x01

/* SCSI interrupt mode 1 */
#define ENSELTIMO    0x80
#define ENATNTARG    0x40
#define ENSCSIRST    0x20
#define ENPHASEMIS   0x10
#define ENBUSFREE    0x08
#define ENSCSIPERR   0x04
#define ENPHASECHG   0x02
#define ENREQINIT    0x01

/* DMA control 0 */
#define ENDMA        0x80
#define _8BIT        0x40
#define DMA          0x20
#define WRITE_READ   0x08
#define INTEN        0x04
#define RSTFIFO      0x02
#define SWINT        0x01

/* DMA control 1 */
#define PWRDWN       0x80
#define STK          0x07    /* mask */

/* DMA status */
#define ATDONE       0x80
#define WORDRDY      0x40
#define INTSTAT      0x20
#define DFIFOFULL    0x10
#define DFIFOEMP     0x08

/* BURST control */
#define BON          0xf0
#define BOFF         0x0f

/* TEST REGISTER */
#define BOFFTMR      0x40
#define BONTMR       0x20
#define STCNTH       0x10
#define STCNTM       0x08
#define STCNTL       0x04
#define SCSIBLK      0x02
#define DMABLK       0x01

/* On the AHA-152x board PORTA and PORTB contain
   some information about the board's configuration. */
typedef union {
  struct {
    unsigned reserved:2;    /* reserved */
    unsigned tardisc:1;     /* Target disconnect: 0=disabled, 1=enabled */
    unsigned syncneg:1;     /* Initial sync neg: 0=disabled, 1=enabled */
    unsigned msgclasses:2;  /* Message classes
                                 0=#4
                                 1=#0, #1, #2, #3, #4
                                 2=#0, #3, #4
                                 3=#0, #4
                             */
    unsigned boot:1;        /* boot: 0=disabled, 1=enabled */
    unsigned dma:1;         /* Transfer mode: 0=PIO; 1=DMA */
    unsigned id:3;          /* SCSI-id */
    unsigned irq:2;         /* IRQ-Channel: 0,3=12, 1=10, 2=11 */
    unsigned dmachan:2;     /* DMA-Channel: 0=0, 1=5, 2=6, 3=7 */
    unsigned parity:1;      /* SCSI-parity: 1=enabled 0=disabled */
  } fields;
  unsigned short port;
} aha152x_config ;

#define cf_parity     fields.parity
#define cf_dmachan    fields.dmachan
#define cf_irq        fields.irq
#define cf_id         fields.id
#define cf_dma        fields.dma
#define cf_boot       fields.boot
#define cf_msgclasses fields.msgclasses
#define cf_syncneg    fields.syncneg
#define cf_tardisc    fields.tardisc
#define cf_port       port

/* Some macros to manipulate ports and their bits */

#define SETPORT(PORT, VAL)         outb( (VAL), (PORT) )
#define SETPORTP(PORT, VAL)        outb_p( (VAL), (PORT) )
#define SETPORTW(PORT, VAL)        outw( (VAL), (PORT) )

#define GETPORT(PORT)              inb( PORT )
#define GETPORTW(PORT)             inw( PORT )

#define SETBITS(PORT, BITS)        outb( (inb(PORT) | (BITS)), (PORT) )
#define CLRBITS(PORT, BITS)        outb( (inb(PORT) & ~(BITS)), (PORT) )
#define CLRSETBITS(PORT, CLR, SET) outb( (inb(PORT) & ~(CLR)) | (SET) , (PORT) )

#define TESTHI(PORT, BITS)         ((inb(PORT) & (BITS)) == BITS)
#define TESTLO(PORT, BITS)         ((inb(PORT) & (BITS)) == 0)

#ifdef DEBUG_AHA152X
enum {
  debug_skipports = 0x0001,
  debug_queue     = 0x0002,
  debug_intr      = 0x0004,
  debug_selection = 0x0008,
  debug_msgo      = 0x0010,
  debug_msgi      = 0x0020,
  debug_status    = 0x0040,
  debug_cmd       = 0x0080,
  debug_datai     = 0x0100,
  debug_datao     = 0x0200,
  debug_abort     = 0x0400,
  debug_done      = 0x0800,
  debug_biosparam = 0x1000,
  debug_phases    = 0x2000,
  debug_queues    = 0x4000,
  debug_reset     = 0x8000,
};
#endif

#endif /* _AHA152X_H */
