xref: /src/sys/arch/evbarm/hdl_g/hdlg_pci.c

/*	$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);
}