/*      $NetBSD: sd.c,v 1.13 2023/06/24 07:02:11 tsutsui Exp $  */

/*
* Copyright (c) 1992 OMRON Corporation.
*
* This code is derived from software contributed to Berkeley by
* OMRON Corporation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*      @(#)sd.c        8.1 (Berkeley) 6/10/93
*/
/*
* Copyright (c) 1992, 1993
*      The Regents of the University of California.  All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* OMRON Corporation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*      @(#)sd.c        8.1 (Berkeley) 6/10/93
*/

/*
* sd.c -- SCSI DISK device driver
* by A.Fujita, FEB-26-1992
*/


/*
* SCSI CCS (Command Command Set) disk driver.
*/
#include <sys/param.h>
#include <sys/disklabel.h>
#include <luna68k/stand/boot/samachdep.h>
#include <luna68k/stand/boot/scsireg.h>

struct  sd_softc {
       int     sc_unit;
       uint    sc_ctlr;
       uint    sc_tgt;
       uint    sc_lun;
       int     sc_part;
       uint    sc_bshift;      /* convert device blocks to DEV_BSIZE blks */
       uint    sc_blks;        /* number of blocks on device */
       int     sc_blksize;     /* device block size in bytes */
       struct disklabel sc_label;
};

static int sdident(struct sd_softc *);
static struct sd_softc *sdinit(uint);

static int
sdident(struct sd_softc *sc)
{
       struct scsi_inquiry inqbuf;
       uint32_t capbuf[2];
       int i;

       if (!scident(sc->sc_ctlr, sc->sc_tgt, sc->sc_lun, &inqbuf, capbuf))
               return -1;

       sc->sc_blks    = capbuf[0];
       sc->sc_blksize = capbuf[1];

       if (sc->sc_blksize != DEV_BSIZE) {
               if (sc->sc_blksize < DEV_BSIZE) {
                       return -1;
               }
               for (i = sc->sc_blksize; i > DEV_BSIZE; i >>= 1)
                       ++sc->sc_bshift;
               sc->sc_blks <<= sc->sc_bshift;
       }
       return inqbuf.type;
}

static struct sd_softc *
sdinit(uint unit)
{
       struct sd_softc *sc;
       struct disklabel *lp;
       char *msg;
       int type;

#ifdef DEBUG
       printf("sdinit: unit = %d\n", unit);
#endif
       sc = alloc(sizeof *sc);
       memset(sc, 0, sizeof *sc);

       sc->sc_unit = unit;
       sc->sc_ctlr = CTLR(unit);
       sc->sc_tgt  = TARGET(unit);
       sc->sc_lun  = 0;        /* XXX no LUN support yet */
       type = sdident(sc);
       if (type < 0)
               return NULL;

       /*
        * Use the default sizes until we've read the label,
        * or longer if there isn't one there.
        */
       lp = &sc->sc_label;

       if (lp->d_secpercyl == 0) {
               lp->d_secsize = DEV_BSIZE;
               lp->d_nsectors = 32;
               lp->d_ntracks = 20;
               lp->d_secpercyl = 32*20;
               lp->d_npartitions = 1;
               lp->d_partitions[0].p_offset = 0;
               lp->d_partitions[0].p_size = LABELSECTOR + 1;
       }

       /*
        * read disklabel
        */
       msg = readdisklabel(sc->sc_ctlr, sc->sc_tgt, lp);
       if (msg != NULL)
               printf("sd(%d): %s\n", unit, msg);

       return sc;
}

int
sdopen(struct open_file *f, ...)
{
       va_list ap;
       struct sd_softc *sc;
       int unit, part;

       va_start(ap, f);
       unit = va_arg(ap, int);
       part = va_arg(ap, int);
       va_end(ap);

       if (unit < 0 || CTLR(unit) >= 2 || TARGET(unit) >= 7)
               return -1;
       if (part < 0 || part >= MAXPARTITIONS)
               return -1;

       sc = sdinit(unit);
       if (sc == NULL)
               return -1;

       sc->sc_part = part;
       f->f_devdata = (void *)sc;

       return 0;
}

int
sdclose(struct open_file *f)
{
       struct sd_softc *sc = f->f_devdata;

       dealloc(sc, sizeof *sc);
       f->f_devdata = NULL;

       return 0;
}

static struct scsi_generic_cdb cdb_read = {
       10,
       { CMD_READ_EXT,  0, 0, 0, 0, 0, 0, 0, 0, 0 }
};

static struct scsi_generic_cdb cdb_write = {
       10,
       { CMD_WRITE_EXT, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
};

int
sdstrategy(void *devdata, int func, daddr_t dblk, size_t size, void *v_buf,
   size_t *rsize)
{
       struct sd_softc *sc;
       struct disklabel *lp;
       uint8_t *buf;
       struct scsi_generic_cdb *cdb;
       daddr_t blk;
       u_int nblk;
       int stat;
#ifdef DEBUG
       int i;
#endif

       sc = devdata;
       if (sc == NULL)
               return -1;

       buf = v_buf;
       lp = &sc->sc_label;
       blk = dblk + (lp->d_partitions[sc->sc_part].p_offset >> sc->sc_bshift);
       nblk = size >> sc->sc_bshift;

       if (func == F_READ)
               cdb = &cdb_read;
       else
               cdb = &cdb_write;

       cdb->cdb[2] = (blk & 0xff000000) >> 24;
       cdb->cdb[3] = (blk & 0x00ff0000) >> 16;
       cdb->cdb[4] = (blk & 0x0000ff00) >>  8;
       cdb->cdb[5] = (blk & 0x000000ff);

       cdb->cdb[7] = ((nblk >> DEV_BSHIFT) & 0xff00) >> 8;
       cdb->cdb[8] = ((nblk >> DEV_BSHIFT) & 0x00ff);

#ifdef DEBUG
       printf("sdstrategy: unit = %d\n", sc->sc_unit);
       printf("sdstrategy: blk = %lu (0x%lx), nblk = %u (0x%x)\n",
           (u_long)blk, (long)blk, nblk, nblk);
       for (i = 0; i < 10; i++)
               printf("sdstrategy: cdb[%d] = 0x%x\n", i, cdb->cdb[i]);
       printf("sdstrategy: ctlr = %d, target = %d\n", sc->sc_ctlr, sc->sc_tgt);
#endif
       stat = scsi_immed_command(sc->sc_ctlr, sc->sc_tgt, sc->sc_lun,
           cdb, buf, size);
       if (stat != 0)
               return EIO;

       if (rsize)
               *rsize = size;

       return 0;
}

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