/*      $OpenBSD: eisa.c,v 1.15 2022/04/06 18:59:28 naddy Exp $ */
/*      $NetBSD: eisa.c,v 1.15 1996/10/21 22:31:01 thorpej Exp $        */

/*
 * Copyright (c) 1995, 1996 Christopher G. Demetriou
 * 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, 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Christopher G. Demetriou
 *      for the NetBSD Project.
 * 4. 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 ``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 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.
 */

/*
 * EISA Bus device
 *
 * Makes sure an EISA bus is present, and finds and attaches devices
 * living on it.
 */

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

#include <machine/bus.h>

#include <dev/eisa/eisareg.h>
#include <dev/eisa/eisavar.h>
#include <dev/eisa/eisadevs.h>

int     eisamatch(struct device *, void *, void *);
void    eisaattach(struct device *, struct device *, void *);

const struct cfattach eisa_ca = {
        sizeof(struct device), eisamatch, eisaattach
};

struct cfdriver eisa_cd = {
        NULL, "eisa", DV_DULL
};

int     eisasubmatch(struct device *, void *, void *);
int     eisaprint(void *, const char *);
void    eisa_devinfo(const char *, char *, size_t);

int
eisamatch(struct device *parent, void *match, void *aux)
{
        struct cfdata *cf = match;
        struct eisabus_attach_args *eba = aux;

        if (strcmp(eba->eba_busname, cf->cf_driver->cd_name))
                return (0);

        /* XXX check other indicators */

        return (1);
}

int
eisaprint(void *aux, const char *pnp)
{
        register struct eisa_attach_args *ea = aux;
        char devinfo[256]; 

        if (pnp) {
                eisa_devinfo(ea->ea_idstring, devinfo, sizeof devinfo);
                printf("%s at %s", devinfo, pnp);
        }
        printf(" slot %d", ea->ea_slot);
        return (UNCONF);
}

int
eisasubmatch(struct device *parent, void *match, void *aux)
{
        struct cfdata *cf = match;
        struct eisa_attach_args *ea = aux;

        if (cf->eisacf_slot != EISA_UNKNOWN_SLOT &&
            cf->eisacf_slot != ea->ea_slot)
                return 0;
        return ((*cf->cf_attach->ca_match)(parent, match, aux));
}

void
eisaattach(struct device *parent, struct device *self, void *aux)
{
        struct eisabus_attach_args *eba = aux;
        bus_space_tag_t iot, memt;
        eisa_chipset_tag_t ec;
        int slot, maxnslots;

        eisa_attach_hook(parent, self, eba);
        printf("\n");

        iot = eba->eba_iot;
        memt = eba->eba_memt;
        ec = eba->eba_ec;

        /*
         * Search for and attach subdevices.
         *
         * Slot 0 is the "motherboard" slot, and the code attaching
         * the EISA bus should have already attached an ISA bus there.
         */
        maxnslots = eisa_maxslots(ec);
        for (slot = 1; slot < maxnslots; slot++) {
                struct eisa_attach_args ea;
                u_int slotaddr;
                bus_space_handle_t slotioh;
                int i;

                ea.ea_dmat = eba->eba_dmat;
                ea.ea_iot = iot;
                ea.ea_memt = memt;
                ea.ea_ec = ec;
                ea.ea_slot = slot;
                slotaddr = EISA_SLOT_ADDR(slot);

                /*
                 * Get a mapping for the whole slot-specific address
                 * space.  If we can't, assume nothing's there but warn
                 * about it.
                 */
                if (bus_space_map(iot, slotaddr, EISA_SLOT_SIZE, 0, &slotioh)) {
                        printf("%s: can't map i/o space for slot %d\n",
                            self->dv_xname, slot);
                        continue;
                }

                /* Get the vendor ID bytes */
                for (i = 0; i < EISA_NVIDREGS; i++) {
#ifdef EISA_SLOTOFF_PRIMING
                        bus_space_write_1(iot, slotioh,
                            EISA_SLOTOFF_PRIMING, EISA_PRIMING_VID(i));
#endif
                        ea.ea_vid[i] = bus_space_read_1(iot, slotioh,
                            EISA_SLOTOFF_VID + i);
                }

                /* Check for device existence */
                if (EISA_VENDID_NODEV(ea.ea_vid)) {
#if 0
                        printf("no device at %s slot %d\n", self->dv_xname,
                            slot);
                        printf("\t(0x%x, 0x%x)\n", ea.ea_vid[0],
                            ea.ea_vid[1]);
#endif
                        bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
                        continue;
                }

                /* And check that the firmware didn't biff something badly */
                if (EISA_VENDID_IDDELAY(ea.ea_vid)) {
                        printf("%s slot %d not configured by BIOS?\n",
                            self->dv_xname, slot);
                        bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
                        continue;
                }

                /* Get the product ID bytes */
                for (i = 0; i < EISA_NPIDREGS; i++) {
#ifdef EISA_SLOTOFF_PRIMING
                        bus_space_write_1(iot, slotioh,
                            EISA_SLOTOFF_PRIMING, EISA_PRIMING_PID(i));
#endif
                        ea.ea_pid[i] = bus_space_read_1(iot, slotioh,
                            EISA_SLOTOFF_PID + i);
                }

                /* Create the ID string from the vendor and product IDs */
                ea.ea_idstring[0] = EISA_VENDID_0(ea.ea_vid);
                ea.ea_idstring[1] = EISA_VENDID_1(ea.ea_vid);
                ea.ea_idstring[2] = EISA_VENDID_2(ea.ea_vid);
                ea.ea_idstring[3] = EISA_PRODID_0(ea.ea_pid);
                ea.ea_idstring[4] = EISA_PRODID_1(ea.ea_pid);
                ea.ea_idstring[5] = EISA_PRODID_2(ea.ea_pid);
                ea.ea_idstring[6] = EISA_PRODID_3(ea.ea_pid);
                ea.ea_idstring[7] = '\0';               /* sanity */

                /* We no longer need the I/O handle; free it. */
                bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);

                /* Attach matching device. */
                config_found_sm(self, &ea, eisaprint, eisasubmatch);
        }
}

#ifdef EISAVERBOSE
/*
 * Descriptions of known vendors and devices ("products").
 */
struct eisa_knowndev {
        int     flags;
        char    id[8];
        const char *name;
};
#define EISA_KNOWNDEV_NOPROD    0x01            /* match on vendor only */

#include <dev/eisa/eisadevs_data.h>
#endif /* EISAVERBOSE */

void
eisa_devinfo(const char *id, char *cp, size_t cp_len)
{
        const char *name;
        int onlyvendor;
#ifdef EISAVERBOSE
        const struct eisa_knowndev *edp;
        int match;
        const char *unmatched = "unknown ";
#else
        const char *unmatched = "";
#endif

        onlyvendor = 0;
        name = NULL;

#ifdef EISAVERBOSE
        /* find the device in the table, if possible. */
        edp = eisa_knowndevs;
        while (edp->name != NULL) {
                /* check this entry for a match */
                if ((edp->flags & EISA_KNOWNDEV_NOPROD) != 0)
                        match = !strncmp(edp->id, id, 3);
                else
                        match = !strcmp(edp->id, id);
                if (match) {
                        name = edp->name;
                        onlyvendor = (edp->flags & EISA_KNOWNDEV_NOPROD) != 0;
                        break;
                }
                edp++;
        }
#endif

        if (name == NULL)
                snprintf(cp, cp_len, "%sdevice %s", unmatched, id);
        else if (onlyvendor)                    /* never if not EISAVERBOSE */
                snprintf(cp, cp_len, "unknown %s device %s", name, id);
        else
                snprintf(cp, cp_len, "%s", name);
}