xref: /src/sys/dev/pci/if_mtd_pci.c

/* $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");
	}
}