/*      $NetBSD: wdc_isapnp.c,v 1.45 2022/09/25 17:19:05 thorpej Exp $  */

/*-
* Copyright (c) 1998, 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum and by Onno van der Linden.
*
* 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: wdc_isapnp.c,v 1.45 2022/09/25 17:19:05 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>

#include <sys/bus.h>
#include <sys/intr.h>

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

#include <dev/isapnp/isapnpreg.h>
#include <dev/isapnp/isapnpvar.h>
#include <dev/isapnp/isapnpdevs.h>

#include <dev/ata/atavar.h>
#include <dev/ic/wdcreg.h>
#include <dev/ic/wdcvar.h>

struct wdc_isapnp_softc {
       struct  wdc_softc sc_wdcdev;
       struct  ata_channel *wdc_chanlist[1];
       struct  ata_channel ata_channel;
       struct  wdc_regs wdc_regs;
       isa_chipset_tag_t sc_ic;
       void    *sc_ih;
       int     sc_drq;
};

static int      wdc_isapnp_probe(device_t, cfdata_t, void *);
static void     wdc_isapnp_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(wdc_isapnp, sizeof(struct wdc_isapnp_softc),
   wdc_isapnp_probe, wdc_isapnp_attach, NULL, NULL);

#ifdef notyet
static void     wdc_isapnp_dma_setup(struct wdc_isapnp_softc *);
static void     wdc_isapnp_dma_start(void *, void *, size_t, int);
static void     wdc_isapnp_dma_finish(void *);
#endif

static int
wdc_isapnp_probe(device_t parent, cfdata_t match, void *aux)
{
       int pri, variant;

       pri = isapnp_devmatch(aux, &isapnp_wdc_devinfo, &variant);
       if (pri && variant > 0)
               pri = 0;
       return (pri);
}

static void
wdc_isapnp_attach(device_t parent, device_t self, void *aux)
{
       struct wdc_isapnp_softc *sc = device_private(self);
       struct wdc_regs *wdr;
       struct isapnp_attach_args *ipa = aux;
       int i;

       if (ipa->ipa_nio != 2 ||
           ipa->ipa_nmem != 0 ||
           ipa->ipa_nmem32 != 0 ||
           ipa->ipa_nirq != 1 ||
           ipa->ipa_ndrq > 1) {
               aprint_error(": unexpected configuration\n");
               return;
       }

       if (isapnp_config(ipa->ipa_iot, ipa->ipa_memt, ipa)) {
               aprint_error(": couldn't map registers\n");
               return;
       }

       aprint_normal(": %s %s\n", ipa->ipa_devident, ipa->ipa_devclass);

       sc->sc_wdcdev.sc_atac.atac_dev = self;
       sc->sc_wdcdev.regs = wdr = &sc->wdc_regs;
       wdr->cmd_iot = ipa->ipa_iot;
       wdr->ctl_iot = ipa->ipa_iot;
       /*
        * An IDE controller can feed us the regions in any order. Pass
        * them along with the 8-byte region in sc_ad.ioh, and the other
        * (2 byte) region in auxioh.
        */
       if (ipa->ipa_io[0].length == 8) {
               wdr->cmd_baseioh = ipa->ipa_io[0].h;
               wdr->ctl_ioh = ipa->ipa_io[1].h;
       } else {
               wdr->cmd_baseioh = ipa->ipa_io[1].h;
               wdr->ctl_ioh = ipa->ipa_io[0].h;
       }

       for (i = 0; i < WDC_NREG; i++) {
               if (bus_space_subregion(wdr->cmd_iot,
                   wdr->cmd_baseioh, i, i == 0 ? 4 : 1,
                   &wdr->cmd_iohs[i]) != 0) {
                       aprint_error(": couldn't subregion registers\n");
                       return;
               }
       }
       wdr->data32iot = wdr->cmd_iot;
       wdr->data32ioh = wdr->cmd_iohs[0];

       sc->sc_ic = ipa->ipa_ic;
       sc->sc_ih = isa_intr_establish(ipa->ipa_ic, ipa->ipa_irq[0].num,
           ipa->ipa_irq[0].type, IPL_BIO, wdcintr, &sc->ata_channel);

#ifdef notyet
       if (ipa->ipa_ndrq > 0) {
               sc->sc_drq = ipa->ipa_drq[0].num;

               sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DMA;
               sc->sc_wdcdev.dma_start = &wdc_isapnp_dma_start;
               sc->sc_wdcdev.dma_finish = &wdc_isapnp_dma_finish;
               wdc_isapnp_dma_setup(sc);
       }
#endif
       sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DATA16 | ATAC_CAP_DATA32;
       sc->sc_wdcdev.sc_atac.atac_pio_cap = 0;
       sc->wdc_chanlist[0] = &sc->ata_channel;
       sc->sc_wdcdev.sc_atac.atac_channels = sc->wdc_chanlist;
       sc->sc_wdcdev.sc_atac.atac_nchannels = 1;
       sc->sc_wdcdev.wdc_maxdrives = 2;
       sc->ata_channel.ch_channel = 0;
       sc->ata_channel.ch_atac = &sc->sc_wdcdev.sc_atac;

       wdc_init_shadow_regs(wdr);

       wdcattach(&sc->ata_channel);
}

#ifdef notyet
static void
wdc_isapnp_dma_setup(struct wdc_isapnp_softc *sc)
{

       if (isa_dmamap_create(sc->sc_ic, sc->sc_drq,
           MAXPHYS, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) {
               aprint_error_dev(sc->sc_wdcdev.sc_atac.atac_dev,
                   "can't create map for drq %d\n", sc->sc_drq);
               sc->sc_wdcdev.sc_atac.atac_cap &= ~ATAC_CAP_DMA;
       }
}

static void
wdc_isapnp_dma_start(void *scv, void *buf, size_t size, int read)
{
       struct wdc_isapnp_softc *sc = scv;

       isa_dmastart(sc->sc_ic, sc->sc_drq, buf, size, NULL,
           (read ? DMAMODE_READ : DMAMODE_WRITE) | DMAMODE_DEMAND,
           BUS_DMA_NOWAIT);
}

static void
wdc_isapnp_dma_finish(void *scv)
{
       struct wdc_isapnp_softc *sc = scv;

       isa_dmadone(sc->sc_ic, sc->sc_drq);
}
#endif

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