/*      $NetBSD: st_atapi.c,v 1.31 2016/07/14 04:00:46 msaitoh Exp $ */

/*
* Copyright (c) 2001 Manuel Bouyer.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: st_atapi.c,v 1.31 2016/07/14 04:00:46 msaitoh Exp $");

#ifdef _KERNEL_OPT
#include "opt_scsi.h"
#endif

#include <sys/param.h>
#include <sys/device.h>
#include <sys/buf.h>
#include <sys/bufq.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/systm.h>

#include <dev/scsipi/stvar.h>
#include <dev/scsipi/atapi_tape.h>

static int      st_atapibus_match(device_t, cfdata_t, void *);
static void     st_atapibus_attach(device_t, device_t, void *);
static int      st_atapibus_ops(struct st_softc *, int, int);
static int      st_atapibus_mode_sense(struct st_softc *, int);

CFATTACH_DECL_NEW(
       st_atapibus,
       sizeof(struct st_softc),
       st_atapibus_match,
       st_atapibus_attach,
       stdetach,
       NULL
);

static const struct scsipi_inquiry_pattern st_atapibus_patterns[] = {
       {T_SEQUENTIAL, T_REMOV,
        "",     "",             ""},
};

static int
st_atapibus_match(device_t parent, cfdata_t match,  void *aux)
{
       struct scsipibus_attach_args *sa = aux;
       int priority;

       if (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(sa->sa_periph)) !=
           SCSIPI_BUSTYPE_ATAPI)
               return 0;

       (void)scsipi_inqmatch(&sa->sa_inqbuf,
           st_atapibus_patterns,
           sizeof(st_atapibus_patterns)/sizeof(st_atapibus_patterns[0]),
           sizeof(st_atapibus_patterns[0]), &priority);
       return priority;
}

static void
st_atapibus_attach(device_t parent, device_t self, void *aux)
{
       struct st_softc *st = device_private(self);
       struct scsipibus_attach_args *sa = aux;
       struct scsipi_periph *periph = sa->sa_periph;

       if (strcmp(sa->sa_inqbuf.vendor, "OnStream DI-30") == 0) {
               struct ast_identifypage identify;
               int error;

               error = scsipi_mode_sense(periph, SMS_DBD,
                   ATAPI_TAPE_IDENTIFY_PAGE, &identify.header,
                   sizeof(identify), XS_CTL_DISCOVERY,
                   ST_RETRIES, ST_CTL_TIME);
               if (error) {
                       aprint_error_dev(self,
                           "onstream get identify: error %d\n", error);
                       return;
               }
               strncpy(identify.ident, "NBSD", 4);
               error = scsipi_mode_select(periph, SMS_PF,
                   &identify.header, sizeof(identify),
                   XS_CTL_DISCOVERY, ST_RETRIES, ST_CTL_TIME);
               if (error) {
                       aprint_error_dev(self,
                           "onstream set identify: error %d\n", error);
                       return;
               }
       }

       st->ops = st_atapibus_ops;
       stattach(parent, self, aux);
}

static int
st_atapibus_ops(struct st_softc *st, int op, int flags)
{
       switch(op) {
       case ST_OPS_RBL:
               /* done in mode_sense */
               return 0;
       case ST_OPS_MODESENSE:
               return st_atapibus_mode_sense(st, flags);
       case ST_OPS_MODESELECT:
               return st_mode_select(st, flags);
       case ST_OPS_CMPRSS_ON:
       case ST_OPS_CMPRSS_OFF:
               return ENODEV;
       default:
               panic("st_scsibus_ops: invalid op");
               /* NOTREACHED */
       }
}

static int
st_atapibus_mode_sense(struct st_softc *st, int flags)
{
       int count, error;
       struct atapi_cappage cappage;
       struct scsipi_periph *periph = st->sc_periph;

       /* get drive capabilities, some drives needs this repeated */
       for (count = 0 ; count < 5 ; count++) {
               error = scsipi_mode_sense(periph, SMS_DBD,
                   ATAPI_TAPE_CAP_PAGE, &cappage.header, sizeof(cappage),
                   flags, ST_RETRIES, ST_CTL_TIME);
               if (error == 0) {
                       st->numblks = 0; /* unused anyway */
                       if (cappage.cap4 & ATAPI_TAPE_CAP_PAGE_BLK32K)
                               st->media_blksize = 32768;
                       else if (cappage.cap4 & ATAPI_TAPE_CAP_PAGE_BLK1K)
                               st->media_blksize = 1024;
                       else if (cappage.cap4 & ATAPI_TAPE_CAP_PAGE_BLK512)
                               st->media_blksize = 512;
                       else {
                               error = ENODEV;
                               continue;
                       }
                       st->blkmin = st->blkmax = st->media_blksize;
                       st->media_density = 0;
                       if (cappage.header.dev_spec & SMH_DSP_WRITE_PROT)
                               st->flags |= ST_READONLY;
                       else
                               st->flags &= ~ST_READONLY;
                       SC_DEBUG(periph, SCSIPI_DB3,
                           ("density code %d, %d-byte blocks, write-%s, ",
                           st->media_density, st->media_blksize,
                           st->flags & ST_READONLY ? "protected" : "enabled"));
                       SC_DEBUG(periph, SCSIPI_DB3,
                           ("%sbuffered\n",
                           cappage.header.dev_spec & SMH_DSP_BUFF_MODE ?
                           "" : "un"));
                       periph->periph_flags |= PERIPH_MEDIA_LOADED;
                       return 0;
               }
       }
       return error;
}

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