/*      $NetBSD: eisa_machdep.c,v 1.42 2024/05/01 16:28:33 andvar Exp $ */

/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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.
*/

/*
* Copyright (c) 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.
*/

/*
* Machine-specific functions for EISA autoconfiguration.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: eisa_machdep.c,v 1.42 2024/05/01 16:28:33 andvar Exp $");

#include "ioapic.h"

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

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

#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#include <dev/eisa/eisavar.h>

#if NIOAPIC > 0
#include <machine/i82093var.h>
#include <machine/mpbiosvar.h>
#endif

/*
* EISA doesn't have any special needs; just use the generic versions
* of these functions.
*
* XXX really doesn't use bounce buffers? --dyoung
*/
struct x86_bus_dma_tag eisa_bus_dma_tag = {
       ._tag_needs_free        = 0,
       ._bounce_thresh         = 0,
       ._bounce_alloc_lo       = 0,
       ._bounce_alloc_hi       = 0,
       ._may_bounce            = NULL,
};

void
eisa_attach_hook(device_t parent, device_t self,
   struct eisabus_attach_args *eba)
{
       extern int eisa_has_been_seen;

       /*
        * Notify others that might need to know that the EISA bus
        * has now been attached.
        */
       if (eisa_has_been_seen)
               panic("eisaattach: EISA bus already seen!");
       eisa_has_been_seen = 1;
}

int
eisa_maxslots(eisa_chipset_tag_t ec)
{

       /*
        * Always try 16 slots.
        */
       return (16);
}

int
eisa_intr_map(eisa_chipset_tag_t ec, u_int irq,
   eisa_intr_handle_t *ihp)
{
       if (irq >= NUM_LEGACY_IRQS) {
               aprint_error("eisa_intr_map: bad IRQ %d\n", irq);
               *ihp = -1;
               return 1;
       }
       if (irq == 2) {
               aprint_verbose("eisa_intr_map: changed IRQ 2 to IRQ 9\n");
               irq = 9;
       }

#if NIOAPIC > 0
       if (mp_busses != NULL) {
               if (intr_find_mpmapping(mp_eisa_bus, irq, ihp) == 0 ||
                   intr_find_mpmapping(mp_isa_bus, irq, ihp) == 0) {
                       *ihp |= irq;
                       return 0;
               } else
                       aprint_verbose("eisa_intr_map: no MP mapping found\n");
       }
#endif

       *ihp = irq;
       return 0;
}

const char *
eisa_intr_string(eisa_chipset_tag_t ec, eisa_intr_handle_t ih, char *buf,
   size_t len)
{
       int irq;

#if NIOAPIC > 0
       irq = APIC_IRQ_LEGACY_IRQ(ih);
#else
       irq = (int) ih;
#endif

       if (ih == 0 || irq >= NUM_LEGACY_IRQS || ih == 2)
               panic("eisa_intr_string: bogus handle 0x%" PRIx64, ih);

#if NIOAPIC > 0
       if (ih & APIC_INT_VIA_APIC)
               snprintf(buf, len, "apic %d int %d (irq %d)",
                   APIC_IRQ_APIC(ih),
                   APIC_IRQ_PIN(ih),
                   irq);
       else
               snprintf(buf, len, "irq %d",  irq);
#else
       snprintf(buf, len, "irq %d", irq);
#endif
       return buf;
}

const struct evcnt *
eisa_intr_evcnt(eisa_chipset_tag_t ec, eisa_intr_handle_t ih)
{

       /* XXX for now, no evcnt parent reported */
       return NULL;
}

void *
eisa_intr_establish(eisa_chipset_tag_t ec, eisa_intr_handle_t ih,
   int type, int level, int (*func)(void *), void *arg)
{
       int pin, irq;
       struct pic *pic;

       pic = &i8259_pic;
       pin = irq = ih;

#if NIOAPIC > 0
       if (ih & APIC_INT_VIA_APIC) {
               struct ioapic_softc * const ioapic = ioapic_find(APIC_IRQ_APIC(ih));
               if (ioapic == NULL) {
                       aprint_normal("eisa_intr_establish: bad ioapic %d\n",
                           APIC_IRQ_APIC(ih));
                       return NULL;
               }
               pic = &ioapic->sc_pic;
               pin = APIC_IRQ_PIN(ih);
               irq = APIC_IRQ_LEGACY_IRQ(ih);
               if (irq < 0 || irq >= NUM_LEGACY_IRQS)
                       irq = -1;
       }
#endif

       return intr_establish(irq, pic, pin, type, level, func, arg, false);
}

void
eisa_intr_disestablish(eisa_chipset_tag_t ec, void *cookie)
{

       intr_disestablish(cookie);
}

int
eisa_conf_read_mem(eisa_chipset_tag_t ec, int slot,
   int func, int entry, struct eisa_cfg_mem *ecm)
{

       /* XXX XXX XXX */
       return (ENOENT);
}

int
eisa_conf_read_irq(eisa_chipset_tag_t ec, int slot,
   int func, int entry, struct eisa_cfg_irq *eci)
{

       /* XXX XXX XXX */
       return (ENOENT);
}

int
eisa_conf_read_dma(eisa_chipset_tag_t ec, int slot,
   int func, int entry, struct eisa_cfg_dma *ecd)
{

       /* XXX XXX XXX */
       return (ENOENT);
}

int
eisa_conf_read_io(eisa_chipset_tag_t ec, int slot,
   int func, int entry, struct eisa_cfg_io *ecio)
{

       /* XXX XXX XXX */
       return (ENOENT);
}