/*      $NetBSD: eisa.c,v 1.50 2024/05/13 00:01:53 msaitoh 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: eisa.c,v 1.50 2024/05/13 00:01:53 msaitoh Exp $");

#include "opt_eisaverbose.h"

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

#include <sys/bus.h>

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

#include "locators.h"

static int      eisamatch(device_t, cfdata_t, void *);
static void     eisaattach(device_t, device_t, void *);

CFATTACH_DECL_NEW(eisa, 0,
   eisamatch, eisaattach, NULL, NULL);

static int      eisaprint(void *, const char *);
static void     eisa_devinfo(const char *, char *, size_t);

static int
eisamatch(device_t parent, cfdata_t cf,
   void *aux)
{
       /* XXX check other indicators */

       return (1);
}

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

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

static void
eisaattach(device_t parent, device_t self, void *aux)
{
       struct eisabus_attach_args *eba = aux;
       bus_space_tag_t iot, memt;
       bus_dma_tag_t dmat;
       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;
       dmat = eba->eba_dmat;

       /*
        * 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;
               int locs[EISACF_NLOCS];

               ea.ea_iot = iot;
               ea.ea_memt = memt;
               ea.ea_ec = ec;
               ea.ea_dmat = dmat;
               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)) {
                       aprint_error_dev(self,
                           "can't map I/O space for slot %d\n", slot);
                       continue;
               }

               /* Get the vendor ID bytes */
               for (i = 0; i < EISA_NVIDREGS; i++)
                       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", device_xname(self),
                           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",
                           device_xname(self), slot);
                       bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
                       continue;
               }

               /* Get the product ID bytes */
               for (i = 0; i < EISA_NPIDREGS; i++)
                       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);

               locs[EISACF_SLOT] = slot;

               /* Attach matching device. */
               config_found(self, &ea, eisaprint,
                   CFARGS(.submatch = config_stdsubmatch,
                          .locators = locs));
       }
}

int
eisa_compatible_match(const struct eisa_attach_args * const ea,
   const struct device_compatible_entry *dce)
{
       const char *idstring = ea->ea_idstring;

       return device_compatible_pmatch(&idstring, 1, dce);
}

const struct device_compatible_entry *
eisa_compatible_lookup(const struct eisa_attach_args * const ea,
   const struct device_compatible_entry *dce)
{
       const char *idstring = ea->ea_idstring;

       return device_compatible_plookup(&idstring, 1, dce);
}

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

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

void
eisa_devinfo(const char *id, char *cp, size_t l)
{
#ifdef EISAVERBOSE
       const char *name;
       const struct eisa_knowndev *edp;
       int match, onlyvendor;

       onlyvendor = 0;
       name = NULL;

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

       if (name == NULL)
               snprintf(cp, l, "unknown device %s", id);
       else if (onlyvendor)
               snprintf(cp, l, "unknown %s device %s", name, id);
       else
               snprintf(cp, l, "%s", name);
#else   /* EISAVERBOSE */

       snprintf(cp, l, "device %s", id);
#endif  /* EISAVERBOSE */
}

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