/*      $NetBSD: wdc_obio.c,v 1.11 2023/12/20 15:00:08 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_obio.c,v 1.11 2023/12/20 15:00:08 thorpej Exp $");

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

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

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

#include <landisk/dev/obiovar.h>

struct wdc_obio_softc {
        struct  wdc_softc sc_wdcdev;
        struct  ata_channel *sc_chanlist[1];
        struct  ata_channel sc_channel;
        struct  wdc_regs sc_wdc_regs;
        void    *sc_ih;
};

static int      wdc_obio_probe(device_t, cfdata_t, void *);
static void     wdc_obio_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(wdc_obio, sizeof(struct wdc_obio_softc),
    wdc_obio_probe, wdc_obio_attach, NULL, NULL);

#define WDC_OBIO_REG_NPORTS     WDC_NREG
#define WDC_OBIO_REG_SIZE       (WDC_OBIO_REG_NPORTS * 2)
#define WDC_OBIO_AUXREG_NPORTS  1
#define WDC_OBIO_AUXREG_SIZE    (WDC_OBIO_AUXREG_NPORTS * 2)
#define WDC_OBIO_AUXREG_OFFSET  0x2c

static int
wdc_obio_probe(device_t parent, cfdata_t cfp, void *aux)
{
        struct obio_attach_args *oa = aux;
        struct wdc_regs wdr;
        int result = 0;
        int i;

        if (oa->oa_nio < 1)
                return (0);
        if (oa->oa_nirq < 1)
                return (0);

        if (oa->oa_io[0].or_addr == IOBASEUNK)
                return (0);
        if (oa->oa_irq[0].or_irq == IRQUNK)
                return (0);

        wdr.cmd_iot = oa->oa_iot;
        if (bus_space_map(wdr.cmd_iot, oa->oa_io[0].or_addr,
            WDC_OBIO_REG_SIZE, 0, &wdr.cmd_baseioh)) {
                goto out;
        }
        for (i = 0; i < WDC_OBIO_REG_NPORTS; i++) {
                if (bus_space_subregion(wdr.cmd_iot, wdr.cmd_baseioh,
                    i * 2, (i == 0) ? 2 : 1, &wdr.cmd_iohs[i])) {
                        goto outunmap;
                }
        }
        wdc_init_shadow_regs(&wdr);

        wdr.ctl_iot = oa->oa_iot;
        if (bus_space_map(wdr.ctl_iot,
            oa->oa_io[0].or_addr + WDC_OBIO_AUXREG_OFFSET,
            WDC_OBIO_AUXREG_SIZE, 0, &wdr.ctl_ioh)) {
                goto outunmap;
        }

        result = wdcprobe(&wdr);
        if (result) {
                oa->oa_nio = 1;
                oa->oa_io[0].or_size = WDC_OBIO_REG_SIZE;
                oa->oa_nirq = 1;
                oa->oa_niomem = 0;
        }

        bus_space_unmap(wdr.ctl_iot, wdr.ctl_ioh, WDC_OBIO_AUXREG_SIZE);
outunmap:
        bus_space_unmap(wdr.cmd_iot, wdr.cmd_baseioh, WDC_OBIO_REG_SIZE);
out:
        return (result);
}

static void
wdc_obio_attach(device_t parent, device_t self, void *aux)
{
        struct wdc_obio_softc *sc = device_private(self);
        struct obio_attach_args *oa = aux;
        struct wdc_regs *wdr;
        int i;

        aprint_naive("\n");
        aprint_normal("\n");

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

        wdr->cmd_iot = oa->oa_iot;
        wdr->ctl_iot = oa->oa_iot;
        if (bus_space_map(wdr->cmd_iot, oa->oa_io[0].or_addr,
            WDC_OBIO_REG_SIZE, 0, &wdr->cmd_baseioh)
         || bus_space_map(wdr->ctl_iot,
            oa->oa_io[0].or_addr + WDC_OBIO_AUXREG_OFFSET,
            WDC_OBIO_AUXREG_SIZE, 0, &wdr->ctl_ioh)) {
                aprint_error_dev(self, "couldn't map registers\n");
                return;
        }

        for (i = 0; i < WDC_OBIO_REG_NPORTS; i++) {
                if (bus_space_subregion(wdr->cmd_iot,
                      wdr->cmd_baseioh, i * 2, (i == 0) ? 2 : 1,
                      &wdr->cmd_iohs[i]) != 0) {
                        aprint_error_dev(self,
                            "couldn't subregion registers\n");
                        return;
                }
        }

        sc->sc_ih = obio_intr_establish(oa->oa_irq[0].or_irq, IPL_BIO, wdcintr,
            &sc->sc_channel);

        sc->sc_wdcdev.cap |= WDC_CAPABILITY_PREATA;
        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);

        wdcattach(&sc->sc_channel);
}