xref: /src/sys/arch/evbppc/nintendo/dev/ehci_ahb.c

/* $NetBSD: ehci_ahb.c,v 1.1 2026/01/09 22:54:29 jmcneill Exp $ */

/*-
 * Copyright (c) 2024 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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ehci_ahb.c,v 1.1 2026/01/09 22:54:29 jmcneill Exp $");

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

#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdivar.h>
#include <dev/usb/usb_mem.h>
#include <dev/usb/ehcireg.h>
#include <dev/usb/ehcivar.h>

#include <machine/wii.h>
#include <machine/wiiu.h>
#include "ahb.h"

#define USB_CHICKENBITS		0x0d0400cc
#define  EHCI_INTR_ENABLE	0x00008000

extern struct powerpc_bus_dma_tag wii_mem2_bus_dma_tag;

static int	ehci_ahb_match(device_t, cfdata_t, void *);
static void	ehci_ahb_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(ehci_ahb, sizeof(struct ehci_softc),
	ehci_ahb_match, ehci_ahb_attach, NULL, NULL);

static int
ehci_ahb_match(device_t parent, cfdata_t cf, void *aux)
{
	struct ahb_attach_args *aaa = aux;

	return wiiu_native || aaa->aaa_irq < 32;
}

static void
ehci_ahb_attach(device_t parent, device_t self, void *aux)
{
	struct ahb_attach_args *aaa = aux;
	struct ehci_softc *sc = device_private(self);
	int error;

	sc->sc_dev = self;
	sc->sc_bus.ub_hcpriv = sc;
	sc->sc_bus.ub_dmatag = &wii_mem2_bus_dma_tag;
	sc->sc_bus.ub_revision = USBREV_2_0;
	sc->sc_flags = EHCIF_32BIT_ACCESS;
	sc->sc_ncomp = aaa->aaa_irq < 32 ? 2 : 1;
	sc->sc_size = 0x100;
	sc->iot = aaa->aaa_bst;
	if (bus_space_map(sc->iot, aaa->aaa_addr, sc->sc_size, 0, &sc->ioh)) {
		aprint_error(": couldn't map registers\n");
		return;
	}

	aprint_naive("\n");
	aprint_normal(": EHCI\n");

	ahb_claim_device(self, IOPEHCEN);

	sc->sc_offs = EREAD1(sc, EHCI_CAPLENGTH);
	EOWRITE4(sc, EHCI_USBINTR, 0);

	out32(USB_CHICKENBITS, in32(USB_CHICKENBITS) | EHCI_INTR_ENABLE);

	error = ehci_init(sc);
	if (error != 0) {
		aprint_error_dev(self, "init failed, error = %d\n", error);
		return;
	}

	ahb_intr_establish(aaa->aaa_irq, IPL_USB, ehci_intr, sc,
	    device_xname(self));

	sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint,
	    CFARGS_NONE);
}