/*      $NetBSD: linux_fdio.c,v 1.14 2021/09/07 11:43:04 riastradh Exp $        */

/*
* Copyright (c) 2000 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Frank van der Linden for Wasabi Systems, Inc.
*
* 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 for the NetBSD Project by
*      Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
*    or promote products derived from this software without specific prior
*    written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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: linux_fdio.c,v 1.14 2021/09/07 11:43:04 riastradh Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/disklabel.h>

#include <sys/fdio.h>

#include <sys/syscallargs.h>

#include <dev/isa/fdreg.h>

#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_ioctl.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/common/linux_util.h>
#include <compat/linux/common/linux_fdio.h>
#include <compat/linux/common/linux_ipc.h>
#include <compat/linux/common/linux_sem.h>

#include <compat/linux/linux_syscallargs.h>

int
linux_ioctl_fdio(struct lwp *l, const struct linux_sys_ioctl_args *uap,
                register_t *retval)
{
       file_t *fp;
       int error;
       int (*ioctlf)(file_t *, u_long, void *);
       u_long com;
       struct fdformat_parms fparams;
       struct linux_floppy_struct lflop;
       struct linux_floppy_drive_struct ldrive;

       com = (u_long)SCARG(uap, data);

       if ((fp = fd_getfile(SCARG(uap, fd))) == NULL)
               return (EBADF);

       com = SCARG(uap, com);
       ioctlf = fp->f_ops->fo_ioctl;

       retval[0] = error = 0;

       switch (com) {
       case LINUX_FDMSGON:
       case LINUX_FDMSGOFF:
       case LINUX_FDTWADDLE:
       case LINUX_FDCLRPRM:
               /* whatever you say */
               break;
       case LINUX_FDPOLLDRVSTAT:
               /*
                * Just fill in some innocent defaults.
                */
               memset(&ldrive, 0, sizeof ldrive);
               ldrive.fd_ref = 1;
               ldrive.maxblock = 2;
               ldrive.maxtrack = ldrive.track = 1;
               ldrive.flags = LINUX_FD_DISK_WRITABLE;
               error = copyout(&ldrive, SCARG(uap, data), sizeof ldrive);
               break;
       case LINUX_FDGETPRM:
               error = ioctlf(fp, FDIOCGETFORMAT, &fparams);
               if (error != 0)
                       break;
               memset(&lflop, 0, sizeof(lflop));
               lflop.size = fparams.ncyl * fparams.nspt * fparams.ntrk;
               lflop.sect = fparams.nspt;
               lflop.head = fparams.ntrk;
               lflop.track = fparams.ncyl;
               lflop.stretch = fparams.stepspercyl == 2 ? 1 : 0;
               lflop.fmt_gap = fparams.gaplen;
               /*
                * XXXX Use knowledge of floppy for these fields.
                * FDIOCGETFORMAT does not provide enough information.
                * It would be better to have FDIOCGETFORMAT return more
                * information.
                */
               switch (fparams.xfer_rate) {
               case 500 * 1024:
                       lflop.spec1 = 0xcf;
                       lflop.gap = 0x1b;
                       lflop.rate = FDC_500KBPS;
                       break;
               case 300 * 1024:
                       lflop.spec1 = 0xdf;
                       lflop.gap = 0x23;
                       lflop.rate = FDC_300KBPS;
                       break;
               case 250 * 1024:
                       lflop.spec1 = 0xdf;
                       lflop.gap = 0x2a;
                       lflop.rate = FDC_250KBPS;
                       break;
               }
               error = copyout(&lflop, SCARG(uap, data), sizeof lflop);
               break;
       case LINUX_FDSETPRM:
               /*
                * Should use FDIOCSETFORMAT here, iff its interface
                * is extended.
                */
       case LINUX_FDDEFPRM:
       case LINUX_FDFMTBEG:
       case LINUX_FDFMTTRK:
       case LINUX_FDFMTEND:
       case LINUX_FDSETEMSGTRESH:
       case LINUX_FDFLUSH:
       case LINUX_FDSETMAXERRS:
       case LINUX_FDGETMAXERRS:
       case LINUX_FDGETDRVTYP:
       case LINUX_FDSETDRVPRM:
       case LINUX_FDGETDRVPRM:
       case LINUX_FDGETDRVSTAT:
       case LINUX_FDRESET:
       case LINUX_FDGETFDCSTAT:
       case LINUX_FDWERRORCLR:
       case LINUX_FDWERRORGET:
       case LINUX_FDRAWCMD:
       case LINUX_FDEJECT:
       default:
               error = EINVAL;
       }

       fd_putfile(SCARG(uap, fd));

       return 0;
}