/*      $NetBSD: hdlg_pci.c,v 1.6 2025/07/03 19:09:48 andvar Exp $      */

/*
 * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
 * All rights reserved.
 *
 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
 *
 * 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 for the NetBSD Project by
 *      Wasabi Systems, Inc.
 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
 *    or promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
 * 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: hdlg_pci.c,v 1.6 2025/07/03 19:09:48 andvar Exp $");

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

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

#include <evbarm/hdl_g/hdlgreg.h>
#include <evbarm/hdl_g/hdlgvar.h>

#include <arm/xscale/i80321reg.h>
#include <arm/xscale/i80321var.h>

#include <dev/pci/pcidevs.h>
#include <dev/pci/ppbreg.h>

int     hdlg_pci_intr_map(const struct pci_attach_args *, pci_intr_handle_t *);
const char *hdlg_pci_intr_string(void *, pci_intr_handle_t, char *, size_t);
const struct evcnt *hdlg_pci_intr_evcnt(void *, pci_intr_handle_t);
void    *hdlg_pci_intr_establish(void *, pci_intr_handle_t,
            int, int (*func)(void *), void *, const char *);
void    hdlg_pci_intr_disestablish(void *, void *);

void
hdlg_pci_init(pci_chipset_tag_t pc, void *cookie)
{

        pc->pc_intr_v = cookie;         /* the i80321 softc */
        pc->pc_intr_map = hdlg_pci_intr_map;
        pc->pc_intr_string = hdlg_pci_intr_string;
        pc->pc_intr_evcnt = hdlg_pci_intr_evcnt;
        pc->pc_intr_establish = hdlg_pci_intr_establish;
        pc->pc_intr_disestablish = hdlg_pci_intr_disestablish;
}

int
hdlg_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
        struct i80321_softc *sc = pa->pa_pc->pc_intr_v;
        uint32_t busno;
        int b, d, f;

        /*
         * GigaLANDISK's interrupts are routed like so:
         *
         *      XINT0   Intel i82541PI Gig-E
         *
         *      XINT1   ACARD ATP875-A
         *
         *      XINT2   NEC ehci/ohci
         *
         *      XINT3   UART
         */

        busno = bus_space_read_4(sc->sc_st, sc->sc_atu_sh, ATU_PCIXSR);
        busno = PCIXSR_BUSNO(busno);
        if (busno == 0xff)
                busno = 0;

        pci_decompose_tag(pa->pa_pc, pa->pa_intrtag, &b, &d, &f);

        /* No mappings for devices not on our bus. */
        if (b != busno)
                goto no_mapping;

        switch (d) {
        case 1:                 /* i82541PI Gig-E */
                if (pa->pa_intrpin == 1) {
                        *ihp = ICU_INT_XINT(0);
                        return 0;
                }
                goto no_mapping;

        case 2:                 /* ATP875-A */
                if (pa->pa_intrpin == 1) {
                        *ihp = ICU_INT_XINT(1);
                        return 0;
                }
                goto no_mapping;

        case 3:                 /* ehci/ohci */
                switch (pa->pa_intrpin) {
                case 1: /* ohci */
                case 2: /* ohci */
                case 3: /* ehci */
                        *ihp = ICU_INT_XINT(2);
                        return 0;
                }
                goto no_mapping;

        default:
 no_mapping:
                printf("hdlg_pci_intr_map: no mapping for %d/%d/%d\n",
                    pa->pa_bus, pa->pa_device, pa->pa_function);
                return 1;
        }

        return 0;
}

const char *
hdlg_pci_intr_string(void *v, pci_intr_handle_t ih, char *buf, size_t len)
{

        strlcpy(buf, i80321_irqnames[ih], len);
        return buf;
}

const struct evcnt *
hdlg_pci_intr_evcnt(void *v, pci_intr_handle_t ih)
{

        /* XXX For now. */
        return NULL;
}

void *
hdlg_pci_intr_establish(void *v, pci_intr_handle_t ih, int ipl,
    int (*func)(void *), void *arg, const char *xname)
{

        return i80321_intr_establish(ih, ipl, func, arg);
}

void
hdlg_pci_intr_disestablish(void *v, void *cookie)
{

        i80321_intr_disestablish(cookie);
}