/* $NetBSD: if_mtd_pci.c,v 1.22 2021/05/08 00:27:02 thorpej Exp $ */

/*-
 * Copyright (c) 2002 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Peter Bex <Peter.Bex@student.kun.nl>.
 *
 * 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.
 */

/*
 * PCI interface for MTD803 cards
 * Written by Peter Bex (peter.bex@student.kun.nl)
 */

/* TODO: Check why in IO space, the MII won't work. Memory mapped works */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_mtd_pci.c,v 1.22 2021/05/08 00:27:02 thorpej Exp $");

#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_ether.h>
#include <net/if_media.h>
#include <sys/bus.h>
#include <dev/mii/miivar.h>
#include <dev/ic/mtd803reg.h>
#include <dev/ic/mtd803var.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>

#define PCI_IO_MAP_REG PCI_BAR(0)
#define PCI_MEM_MAP_REG PCI_BAR(1)

static const struct device_compatible_entry compat_data[] = {
        { .id = PCI_ID_CODE(PCI_VENDOR_MYSON, PCI_PRODUCT_MYSON_MTD803) },

        PCI_COMPAT_EOL
};

static int      mtd_pci_match(device_t, cfdata_t, void *);
static void     mtd_pci_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(mtd_pci, sizeof(struct mtd_softc), mtd_pci_match,
    mtd_pci_attach, NULL, NULL);

static int
mtd_pci_match(device_t parent, cfdata_t match, void *aux)
{
        struct pci_attach_args *pa = aux;

        return pci_compatible_match(pa, compat_data);
}

static void
mtd_pci_attach(device_t parent, device_t self, void *aux)
{
        struct pci_attach_args * const pa = aux;
        struct mtd_softc * const sc = device_private(self);
        pci_intr_handle_t ih;
        const char *intrstring = NULL;
        bus_space_tag_t iot, memt;
        bus_space_handle_t ioh, memh;
        int io_valid, mem_valid;
        char intrbuf[PCI_INTRSTR_LEN];

        sc->dev = self;
        pci_aprint_devinfo(pa, NULL);

        io_valid = (pci_mapreg_map(pa, PCI_IO_MAP_REG, PCI_MAPREG_TYPE_IO,
                        0, &iot, &ioh, NULL, NULL) == 0);
        mem_valid = (pci_mapreg_map(pa, PCI_MEM_MAP_REG, PCI_MAPREG_TYPE_MEM
                        | PCI_MAPREG_MEM_TYPE_32BIT, 0, &memt, &memh,
                        NULL, NULL) == 0);

        if (mem_valid) {
                sc->bus_tag = memt;
                sc->bus_handle = memh;
        } else if (io_valid) {
                sc->bus_tag = iot;
                sc->bus_handle = ioh;
        } else {
                aprint_error_dev(sc->dev,
                    "could not map memory or i/o space\n");
                return;
        }
        sc->dma_tag = pa->pa_dmat;

        /* Do generic attach. Seems this must be done before setting IRQ */
        mtd_config(sc);

        if (pci_intr_map(pa, &ih)) {
                aprint_error_dev(sc->dev, "could not map interrupt\n");
                return;
        }
        intrstring = pci_intr_string(pa->pa_pc, ih, intrbuf, sizeof(intrbuf));

        if (pci_intr_establish_xname(pa->pa_pc, ih, IPL_NET, mtd_irq_h, sc,
            device_xname(self)) == NULL) {
                aprint_error_dev(sc->dev, "could not establish interrupt");
                if (intrstring != NULL)
                        aprint_error(" at %s", intrstring);
                aprint_error("\n");
                return;
        } else {
                aprint_normal_dev(sc->dev, "using %s for interrupt\n",
                        intrstring ? intrstring : "unknown interrupt");
        }
}