/*      $NetBSD: lm_pnpbios.c,v 1.15 2011/07/01 18:14:15 dyoung Exp $ */

/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Bill Squier.
*
* 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: lm_pnpbios.c,v 1.15 2011/07/01 18:14:15 dyoung Exp $");

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

#include <sys/bus.h>

#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>

#include <i386/pnpbios/pnpbiosvar.h>

#include <dev/sysmon/sysmonvar.h>

#include <dev/ic/nslm7xvar.h>


int     lm_pnpbios_match(device_t, cfdata_t, void *);
void    lm_pnpbios_attach(device_t, device_t, void *);

int     lm_pnpbios_hints_index(const char *);
uint8_t lm_pnpbios_readreg(struct lm_softc *, int);
void    lm_pnpbios_writereg(struct lm_softc *, int, int);


CFATTACH_DECL_NEW(lm_pnpbios, sizeof(struct lm_softc),
   lm_pnpbios_match, lm_pnpbios_attach, NULL, NULL);

/*
* XXX - no known pnpbios ids for lm series chips.
*/
struct lm_pnpbios_hint {
       char idstr[8];
       int io_region_idx_lm7x;
};

/*
* Currently no known valid pnpbios id's - PNP0C02 is
* for reserved motherboard resources, probing it is bad.
*/
struct lm_pnpbios_hint lm_pnpbios_hints[] = {
       { { 0 }, 0 }
};


int
lm_pnpbios_hints_index(const char *idstr)
{
       int idx = 0;

       while (lm_pnpbios_hints[idx].idstr[0] != 0) {
               if (!strcmp(lm_pnpbios_hints[idx].idstr, idstr))
                       return idx;
               ++idx;
       }

       return -1;
}

int
lm_pnpbios_match(device_t parent, cfdata_t match, void *aux)
{
       struct pnpbiosdev_attach_args *aa = aux;
       struct lm_pnpbios_hint *wph;
       bus_space_tag_t iot;
       bus_space_handle_t ioh;
       int rv;

       int wphi;

       if ((wphi = lm_pnpbios_hints_index(aa->idstr)) == -1)
               return 0;

       wph = &lm_pnpbios_hints[wphi];

       if (pnpbios_io_map(aa->pbt, aa->resc, wph->io_region_idx_lm7x,
                          &iot, &ioh)) {
               return 0;
       }

       rv = lm_probe(iot, ioh);

       pnpbios_io_unmap(aa->pbt, aa->resc, wph->io_region_idx_lm7x,
                        iot, ioh);

       return rv;
}

void
lm_pnpbios_attach(device_t parent, device_t self, void *aux)
{
       struct lm_softc *sc = device_private(self);
       struct pnpbiosdev_attach_args *aa = aux;
       struct lm_pnpbios_hint *wph;

       wph = &lm_pnpbios_hints[lm_pnpbios_hints_index(aa->idstr)];

       if (pnpbios_io_map(aa->pbt, aa->resc, wph->io_region_idx_lm7x,
                          &sc->lm_iot, &sc->lm_ioh)) {
               aprint_error(": can't map i/o space\n");
               return;
       }

       aprint_naive("\n");
       aprint_normal("\n");
       pnpbios_print_devres(self, aa);

       /* Bus-independent attach */
       sc->lm_writereg = lm_pnpbios_writereg;
       sc->lm_readreg = lm_pnpbios_readreg;

       lm_attach(sc);
}

uint8_t
lm_pnpbios_readreg(struct lm_softc *sc, int reg)
{
       bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_ADDR, reg);
       return (bus_space_read_1(sc->lm_iot, sc->lm_ioh, LMC_DATA));
}


void
lm_pnpbios_writereg(struct lm_softc *sc, int reg, int val)
{
       bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_ADDR, reg);
       bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_DATA, val);
}