/* $NetBSD: genet_fdt.c,v 1.6 2021/05/03 10:28:26 rin Exp $ */

/*-
 * Copyright (c) 2020 Jared McNeill <jmcneill@invisible.ca>
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 "opt_net_mpsafe.h"

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: genet_fdt.c,v 1.6 2021/05/03 10:28:26 rin Exp $");

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <sys/intr.h>
#include <sys/systm.h>
#include <sys/kernel.h>

#include <sys/rndsource.h>

#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_ether.h>
#include <net/if_media.h>

#include <dev/mii/miivar.h>

#include <dev/ic/bcmgenetvar.h>

#include <dev/fdt/fdtvar.h>

#ifdef NET_MPSAFE
#define	FDT_INTR_FLAGS	FDT_INTR_MPSAFE
#else
#define	FDT_INTR_FLAGS	0
#endif

static int	genet_fdt_match(device_t, cfdata_t, void *);
static void	genet_fdt_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(genet_fdt, sizeof(struct genet_softc),
	genet_fdt_match, genet_fdt_attach, NULL, NULL);

static const struct device_compatible_entry compat_data[] = {
	{ .compat = "brcm,bcm2711-genet-v5" },
	DEVICE_COMPAT_EOL
};

static int
genet_fdt_match(device_t parent, cfdata_t cf, void *aux)
{
	struct fdt_attach_args * const faa = aux;

	return of_compatible_match(faa->faa_phandle, compat_data);
}

static void
genet_fdt_attach(device_t parent, device_t self, void *aux)
{
	struct genet_softc * const sc = device_private(self);
	struct fdt_attach_args * const faa = aux;
	const int phandle = faa->faa_phandle;
	char intrstr[128];
	bus_addr_t addr;
	bus_size_t size;
	void *ih;

	if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
		aprint_error(": couldn't get registers\n");
		return;
	}

	sc->sc_dev = self;
	sc->sc_bst = faa->faa_bst;
	if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
		aprint_error(": couldn't map registers\n");
		return;
	}
	sc->sc_dmat = faa->faa_dmat;
	sc->sc_phy_id = MII_PHY_ANY;

	const char *phy_mode = fdtbus_get_string(phandle, "phy-mode");
	if (phy_mode == NULL) {
		aprint_error(": missing 'phy-mode' property\n");
		return;
	}

	if (strcmp(phy_mode, "rgmii-rxid") == 0)
		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_RXID;
	else if (strcmp(phy_mode, "rgmii-txid") == 0)
		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_TXID;
	else if (strcmp(phy_mode, "rgmii-id") == 0)
		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_ID;
	else if (strcmp(phy_mode, "rgmii") == 0)
		sc->sc_phy_mode = GENET_PHY_MODE_RGMII;
	else {
		aprint_error(": unsupported phy-mode '%s'\n", phy_mode);
		return;
	}

	if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
		aprint_error(": failed to decode interrupt\n");
		return;
	}

	if (genet_attach(sc) != 0)
		return;

	ih = fdtbus_intr_establish_xname(phandle, 0, IPL_NET, FDT_INTR_MPSAFE,
	    genet_intr, sc, device_xname(self));
	if (ih == NULL) {
		aprint_error_dev(self, "couldn't establish interrupt on %s\n",
		    intrstr);
		return;
	}
	aprint_normal_dev(self, "interrupting on %s\n", intrstr);
}