/*      $NetBSD: stub_ebus.c,v 1.4 2014/07/25 08:10:32 dholland Exp $   */

/*-
* Copyright (c) 2010 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code was written by Alessandro Forin and Neil Pittman
* at Microsoft Research and contributed to The NetBSD Foundation
* by Microsoft 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/

/* Before including this file for "foo" you need to define
#define STUBSTRING       "foo"
#define STUBBANNER       "8MB flash memory"  -- tell the user what it is
#define STUBSTRUCT       _Flash   -- whatever that struct is defined in emipsreg.h
#define STUBMATCH(_f_)   (((_f_)->BaseAddressAndTag & FLASHBT_TAG) == PMTTAG_FLASH)
*/

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/conf.h>

#include <emips/ebus/ebusvar.h>
#include <emips/emips/machdep.h>
#include <machine/emipsreg.h>

/*
* Device softc
*/
struct stub_softc {
       struct STUBSTRUCT *sc_dp;
};

static int      stub_ebus_match (device_t, cfdata_t, void *);
static void     stub_ebus_attach (device_t, device_t, void *);

CFATTACH_DECL_NEW(stub_ebus, sizeof (struct stub_softc),
   stub_ebus_match, stub_ebus_attach, NULL, NULL);

static int
stub_ebus_match(device_t parent, cfdata_t match, void *aux)
{
       struct ebus_attach_args *ia = aux;
       struct STUBSTRUCT *f = (struct STUBSTRUCT *)ia->ia_vaddr;

       if (strcmp(STUBSTRING, ia->ia_name) != 0)
               return (0);
       if ((f == NULL) || (! STUBMATCH(f)))
               return (0);

       return (1);
}

static void
stub_ebus_attach(device_t parent, device_t self, void *aux)
{
       struct ebus_attach_args *ia =aux;
       struct stub_softc *sc = device_private(self);

       sc->sc_dp = (struct STUBSTRUCT*)ia->ia_vaddr;

#if DEBUG
       printf(" virt=%p", (void*)sc->sc_dp);
#endif
       printf(": %s\n", STUBBANNER);

}

/* Required funcs
*/
static int     stubopen(dev_t device, int flags, int fmt, struct lwp *process);
static int     stubclose(dev_t device, int flags, int fmt, struct lwp *process);

/* just define the character device handlers because that is all we need */
const struct cdevsw stub_cdevsw = {
       .d_open = stubopen,
       .d_close = stubclose,
       .d_read = noread,
       .d_write = nowrite,
       .d_ioctl = noioctl,
       .d_stop = nostop,
       .d_tty = notty,
       .d_poll = nopoll,
       .d_mmap = nommap,
       .d_kqfilter = nokqfilter,
       .d_discard = nodiscard,
       .d_flag = 0
};

/*
* Handle an open request on the device.
*/
static int
stubopen(dev_t device, int flags, int fmt, struct lwp *process)
{
       return 0; /* this always succeeds */
}

/*
* Handle the close request for the device.
*/
static int
stubclose(dev_t device, int flags, int fmt, struct lwp *process)
{
       return 0; /* again this always succeeds */
}