/* $NetBSD: kftxx.c,v 1.19 2021/08/07 16:18:41 thorpej Exp $ */

/*
 * Copyright (c) 1997 by Matthew Jacob
 * NASA AMES Research Center.
 * All rights reserved.
 *
 * 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 immediately at the beginning of the file, without modification,
 *    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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 */

/*
 * KFTIA and KFTHA Bus Adapter Node for I/O hoses
 * found on AlphaServer 8200 and 8400 systems.
 *
 * i.e., handler for all TLSB I/O nodes.
 */

#include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */

__KERNEL_RCSID(0, "$NetBSD: kftxx.c,v 1.19 2021/08/07 16:18:41 thorpej Exp $");

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

#include <machine/autoconf.h>
#include <machine/rpb.h>
#include <machine/pte.h>

#include <alpha/tlsb/tlsbreg.h>
#include <alpha/tlsb/tlsbvar.h>
#include <alpha/tlsb/kftxxreg.h>
#include <alpha/tlsb/kftxxvar.h>
#include <alpha/pci/dwlpxvar.h>

struct kft_softc {
        device_t        sc_dev;
        int             sc_node;        /* TLSB node */
        uint16_t        sc_dtype;       /* device type */
};

#define KV(_addr)       ((void *)ALPHA_PHYS_TO_K0SEG((_addr)))

static int      kftmatch(device_t, cfdata_t, void *);
static void     kftattach(device_t, device_t, void *);

CFATTACH_DECL_NEW(kft, sizeof(struct kft_softc),
    kftmatch, kftattach, NULL, NULL);

static int      kftprint(void *, const char *);

static int
kftprint(void *aux, const char *pnp)
{
        register struct kft_dev_attach_args *ka = aux;
        if (pnp)
                 aprint_normal("%s at %s", ka->ka_name, pnp);
        aprint_normal(" hose %d", ka->ka_hosenum);
        return (UNCONF);
}

static int
kftmatch(device_t parent, cfdata_t cf, void *aux)
{
        struct tlsb_dev_attach_args *ta = aux;
        if (TLDEV_ISIOPORT(ta->ta_dtype))
                return (1);
        return (0);
}

static void
kftattach(device_t parent, device_t self, void *aux)
{
        struct tlsb_dev_attach_args *ta = aux;
        struct kft_softc *sc = device_private(self);
        struct kft_dev_attach_args ka;
        int hoseno;

        sc->sc_dev = self;
        sc->sc_node = ta->ta_node;
        sc->sc_dtype = ta->ta_dtype;

        aprint_normal("\n");

        for (hoseno = 0; hoseno < MAXHOSE; hoseno++) {
                uint32_t value =
                    TLSB_GET_NODEREG(sc->sc_node, KFT_IDPNSEX(hoseno));
                if (value & 0x0E000000) {
                        aprint_error_dev(self, "Hose %d IDPNSE has %x\n",
                            hoseno, value);
                        continue;
                }
                if ((value & 0x1) != 0x0) {
                        aprint_error_dev(self,
                            "Hose %d has a Bad Cable (0x%x)\n", hoseno, value);
                        continue;
                }
                if ((value & 0x6) != 0x6) {
                        if (value)
                                aprint_error_dev(self,
                                    "Hose %d is missing PWROK (0x%x)\n",
                                    hoseno, value);
                        continue;
                }
                ka.ka_name = "dwlpx";
                ka.ka_node = sc->sc_node;
                ka.ka_dtype = sc->sc_dtype;
                ka.ka_hosenum = hoseno;
                config_found(self, &ka, kftprint, CFARGS_NONE);
        }
}