/*      $NetBSD: wdc_amiga.c,v 1.41 2023/12/20 00:40:42 thorpej Exp $ */

/*-
* Copyright (c) 2000, 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Michael L. Hitch.
*
* 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_amiga.c,v 1.41 2023/12/20 00:40:42 thorpej Exp $");

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

#include <machine/cpu.h>
#include <machine/intr.h>
#include <sys/bswap.h>

#include <amiga/amiga/cia.h>
#include <amiga/amiga/custom.h>
#include <amiga/amiga/device.h>
#include <amiga/amiga/gayle.h>
#include <amiga/dev/zbusvar.h>

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

struct wdc_amiga_softc {
       struct wdc_softc sc_wdcdev;
       struct  ata_channel *sc_chanlist[1];
       struct  ata_channel sc_channel;
       struct wdc_regs sc_wdc_regs;
       struct isr sc_isr;
       struct bus_space_tag cmd_iot;
       struct bus_space_tag ctl_iot;
       bool gayle_intr;
};

int     wdc_amiga_probe(device_t, cfdata_t, void *);
void    wdc_amiga_attach(device_t, device_t, void *);
int     wdc_amiga_intr(void *);

CFATTACH_DECL_NEW(wdc_amiga, sizeof(struct wdc_amiga_softc),
   wdc_amiga_probe, wdc_amiga_attach, NULL, NULL);

int
wdc_amiga_probe(device_t parent, cfdata_t cfp, void *aux)
{
       if ((!is_a4000() && !is_a1200() && !is_a600()) ||
           !matchname(aux, "wdc"))
               return(0);
       return 1;
}

void
wdc_amiga_attach(device_t parent, device_t self, void *aux)
{
       struct wdc_amiga_softc *sc = device_private(self);
       struct wdc_regs *wdr;
       int i;

       aprint_normal("\n");

       sc->sc_wdcdev.sc_atac.atac_dev = self;
       sc->sc_wdcdev.regs = wdr = &sc->sc_wdc_regs;

       gayle_init();

       if (is_a4000()) {
               sc->cmd_iot.base = (bus_addr_t) ztwomap(GAYLE_IDE_BASE_A4000 + 2);
               sc->gayle_intr = false;
       } else {
               sc->cmd_iot.base = (bus_addr_t) ztwomap(GAYLE_IDE_BASE + 2);
               sc->gayle_intr = true;
       }

       sc->cmd_iot.absm = sc->ctl_iot.absm = &amiga_bus_stride_4swap;
       wdr->cmd_iot = &sc->cmd_iot;
       wdr->ctl_iot = &sc->ctl_iot;

       if (bus_space_map(wdr->cmd_iot, 0, 0x40, 0,
                         &wdr->cmd_baseioh)) {
               aprint_error_dev(self, "couldn't map registers\n");
               return;
       }

       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) {

                       bus_space_unmap(wdr->cmd_iot,
                           wdr->cmd_baseioh, 0x40);
                       aprint_error_dev(self, "couldn't map registers\n");
                       return;
               }
       }

       if (bus_space_subregion(wdr->cmd_iot,
           wdr->cmd_baseioh, 0x406, 1, &wdr->ctl_ioh))
               return;

       sc->sc_wdcdev.sc_atac.atac_cap = ATAC_CAP_DATA16;
       sc->sc_wdcdev.sc_atac.atac_pio_cap = 0;
       sc->sc_chanlist[0] = &sc->sc_channel;
       sc->sc_wdcdev.sc_atac.atac_channels = sc->sc_chanlist;
       sc->sc_wdcdev.sc_atac.atac_nchannels = 1;
       sc->sc_wdcdev.wdc_maxdrives = 2;
       sc->sc_channel.ch_channel = 0;
       sc->sc_channel.ch_atac = &sc->sc_wdcdev.sc_atac;

       wdc_init_shadow_regs(wdr);

       sc->sc_isr.isr_intr = wdc_amiga_intr;
       sc->sc_isr.isr_arg = sc;
       sc->sc_isr.isr_ipl = 2;
       add_isr (&sc->sc_isr);

       if (sc->gayle_intr)
               gayle_intr_enable_set(GAYLE_INT_IDE);

       wdcattach(&sc->sc_channel);
}

int
wdc_amiga_intr(void *arg)
{
       struct wdc_amiga_softc *sc;
       uint8_t intreq;
       int ret;

       sc = (struct wdc_amiga_softc *)arg;
       ret = 0;
       intreq = gayle_intr_status();

       if (intreq & GAYLE_INT_IDE) {
               if (sc->gayle_intr)
                       gayle_intr_ack(0x7C | (intreq & GAYLE_INT_IDEACK));
               ret = wdcintr(&sc->sc_channel);
       }

       return ret;
}

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