ehci_ahb.c revision 1.1 
1/* $NetBSD: ehci_ahb.c,v 1.1 2026/01/09 22:54:29 jmcneill Exp $ */
2
3/*-
4 * Copyright (c) 2024 Jared McNeill <jmcneill@invisible.ca>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__KERNEL_RCSID(0, "$NetBSD: ehci_ahb.c,v 1.1 2026/01/09 22:54:29 jmcneill Exp $");
31
32#include <sys/param.h>
33#include <sys/bus.h>
34#include <sys/device.h>
35#include <sys/systm.h>
36
37#include <dev/usb/usb.h>
38#include <dev/usb/usbdi.h>
39#include <dev/usb/usbdivar.h>
40#include <dev/usb/usb_mem.h>
41#include <dev/usb/ehcireg.h>
42#include <dev/usb/ehcivar.h>
43
44#include <machine/wii.h>
45#include <machine/wiiu.h>
46#include "ahb.h"
47
48#define USB_CHICKENBITS		0x0d0400cc
49#define  EHCI_INTR_ENABLE	0x00008000
50
51extern struct powerpc_bus_dma_tag wii_mem2_bus_dma_tag;
52
53static int	ehci_ahb_match(device_t, cfdata_t, void *);
54static void	ehci_ahb_attach(device_t, device_t, void *);
55
56CFATTACH_DECL_NEW(ehci_ahb, sizeof(struct ehci_softc),
57	ehci_ahb_match, ehci_ahb_attach, NULL, NULL);
58
59static int
60ehci_ahb_match(device_t parent, cfdata_t cf, void *aux)
61{
62	struct ahb_attach_args *aaa = aux;
63
64	return wiiu_native || aaa->aaa_irq < 32;
65}
66
67static void
68ehci_ahb_attach(device_t parent, device_t self, void *aux)
69{
70	struct ahb_attach_args *aaa = aux;
71	struct ehci_softc *sc = device_private(self);
72	int error;
73
74	sc->sc_dev = self;
75	sc->sc_bus.ub_hcpriv = sc;
76	sc->sc_bus.ub_dmatag = &wii_mem2_bus_dma_tag;
77	sc->sc_bus.ub_revision = USBREV_2_0;
78	sc->sc_flags = EHCIF_32BIT_ACCESS;
79	sc->sc_ncomp = aaa->aaa_irq < 32 ? 2 : 1;
80	sc->sc_size = 0x100;
81	sc->iot = aaa->aaa_bst;
82	if (bus_space_map(sc->iot, aaa->aaa_addr, sc->sc_size, 0, &sc->ioh)) {
83		aprint_error(": couldn't map registers\n");
84		return;
85	}
86
87	aprint_naive("\n");
88	aprint_normal(": EHCI\n");
89
90	ahb_claim_device(self, IOPEHCEN);
91
92	sc->sc_offs = EREAD1(sc, EHCI_CAPLENGTH);
93	EOWRITE4(sc, EHCI_USBINTR, 0);
94
95	out32(USB_CHICKENBITS, in32(USB_CHICKENBITS) | EHCI_INTR_ENABLE);
96
97	error = ehci_init(sc);
98	if (error != 0) {
99		aprint_error_dev(self, "init failed, error = %d\n", error);
100		return;
101	}
102
103	ahb_intr_establish(aaa->aaa_irq, IPL_USB, ehci_intr, sc,
104	    device_xname(self));
105
106	sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint,
107	    CFARGS_NONE);
108}
109