/* $OpenBSD: tsp_pci.c,v 1.5 2025/06/28 16:04:09 miod Exp $ */
/* $NetBSD: tsp_pci.c,v 1.1 1999/06/29 06:46:47 ross Exp $ */

/*-
 * Copyright (c) 1999 by Ross Harvey.  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 Ross Harvey.
 * 4. The name of Ross Harvey may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY ROSS HARVEY ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURP0SE
 * ARE DISCLAIMED.  IN NO EVENT SHALL ROSS HARVEY 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/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>

#include <uvm/uvm_extern.h>

#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>

#include <machine/autoconf.h>
#include <machine/rpb.h>

#include <alpha/pci/tsreg.h>
#include <alpha/pci/tsvar.h>

#define tsp_pci() { Generate ctags(1) key. }

void            tsp_attach_hook(struct device *, struct device *,
                    struct pcibus_attach_args *);
int             tsp_bus_maxdevs(void *, int);
pcitag_t        tsp_make_tag(void *, int, int, int);
void            tsp_decompose_tag(void *, pcitag_t, int *, int *,
                    int *);
int             tsp_conf_size(void *, pcitag_t);
pcireg_t        tsp_conf_read(void *, pcitag_t, int);
void            tsp_conf_write(void *, pcitag_t, int, pcireg_t);

void
tsp_pci_init(pci_chipset_tag_t pc, void *v)
{
        pc->pc_conf_v = v;
        pc->pc_attach_hook = tsp_attach_hook;
        pc->pc_bus_maxdevs = tsp_bus_maxdevs;
        pc->pc_make_tag = tsp_make_tag;
        pc->pc_decompose_tag = tsp_decompose_tag;
        pc->pc_conf_size = tsp_conf_size;
        pc->pc_conf_read = tsp_conf_read;
        pc->pc_conf_write = tsp_conf_write;
}

void
tsp_attach_hook(struct device *parent, struct device *self,
    struct pcibus_attach_args *pba)
{
}

int
tsp_bus_maxdevs(void *cpv, int busno)
{
        return 32;
}

pcitag_t
tsp_make_tag(void *cpv, int b, int d, int f)
{
        return b << 16 | d << 11 | f << 8;
}

void
tsp_decompose_tag(void *cpv, pcitag_t tag, int *bp, int *dp, int *fp)
{
        if (bp != NULL)
                *bp = (tag >> 16) & 0xff;
        if (dp != NULL)
                *dp = (tag >> 11) & 0x1f;
        if (fp != NULL)
                *fp = (tag >> 8) & 0x7;
}

int
tsp_conf_size(void *cpv, pcitag_t tag)
{
        return PCI_CONFIG_SPACE_SIZE;
}

/*
 * Tsunami makes this a lot easier than it used to be, automatically
 * generating type 0 or type 1 cycles, and quietly returning -1 with
 * no errors on unanswered probes.
 */
pcireg_t
tsp_conf_read(void *cpv, pcitag_t tag, int offset)
{
        pcireg_t *datap, data;
        struct tsp_config *pcp = cpv;

        datap = S_PAGE(pcp->pc_iobase | P_PCI_CONFIG | tag | (offset & ~3));
        alpha_mb();
        data = *datap;
        alpha_mb();
        return data;
}

void
tsp_conf_write(void *cpv, pcitag_t tag, int offset, pcireg_t data)
{
        pcireg_t *datap;
        struct tsp_config *pcp = cpv;

        datap = S_PAGE(pcp->pc_iobase | P_PCI_CONFIG | tag | (offset & ~3));
        alpha_mb();
        *datap = data;
        alpha_mb();
}