ehci_acpi.c revision 1.3 
1/* $NetBSD: ehci_acpi.c,v 1.3 2018/11/16 23:18:17 jmcneill Exp $ */
2
3/*-
4 * Copyright (c) 2018 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jared McNeill <jmcneill@invisible.ca>.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: ehci_acpi.c,v 1.3 2018/11/16 23:18:17 jmcneill Exp $");
34
35#include <sys/param.h>
36#include <sys/bus.h>
37#include <sys/cpu.h>
38#include <sys/device.h>
39
40#include <dev/usb/usb.h>
41#include <dev/usb/usbdi.h>
42#include <dev/usb/usbdivar.h>
43#include <dev/usb/usb_mem.h>
44#include <dev/usb/ehcireg.h>
45#include <dev/usb/ehcivar.h>
46
47#include <dev/acpi/acpireg.h>
48#include <dev/acpi/acpivar.h>
49#include <dev/acpi/acpi_intr.h>
50#include <dev/acpi/acpi_usb.h>
51
52static const char * const compatible[] = {
53	"PNP0D20",	/* EHCI-compliant USB controller without standard debug */
54	"PNP0D25",	/* EHCI-compliant USB controller with standard debug */
55	NULL
56};
57
58struct ehci_acpi_softc {
59	struct ehci_softc	sc_ehci;
60	ACPI_HANDLE		sc_handle;
61};
62
63static int	ehci_acpi_match(device_t, cfdata_t, void *);
64static void	ehci_acpi_attach(device_t, device_t, void *);
65
66static void	ehci_acpi_init(struct ehci_softc *);
67
68CFATTACH_DECL2_NEW(ehci_acpi, sizeof(struct ehci_acpi_softc),
69	ehci_acpi_match, ehci_acpi_attach, NULL,
70	ehci_activate, NULL, ehci_childdet);
71
72static int
73ehci_acpi_match(device_t parent, cfdata_t cf, void *aux)
74{
75	struct acpi_attach_args *aa = aux;
76
77	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
78		return 0;
79
80	return acpi_match_hid(aa->aa_node->ad_devinfo, compatible);
81}
82
83static void
84ehci_acpi_attach(device_t parent, device_t self, void *aux)
85{
86	struct ehci_acpi_softc * const asc = device_private(self);
87	struct ehci_softc * const sc = &asc->sc_ehci;
88	struct acpi_attach_args *aa = aux;
89	struct acpi_resources res;
90	struct acpi_mem *mem;
91	struct acpi_irq *irq;
92	ACPI_STATUS rv;
93	int error;
94	void *ih;
95
96	asc->sc_handle = aa->aa_node->ad_handle;
97
98	sc->sc_dev = self;
99	sc->sc_bus.ub_hcpriv = sc;
100	sc->sc_bus.ub_dmatag = aa->aa_dmat;
101	sc->sc_bus.ub_revision = USBREV_2_0;
102	sc->sc_flags = EHCIF_ETTF;
103	sc->sc_vendor_init = ehci_acpi_init;
104
105	rv = acpi_resource_parse(sc->sc_dev, asc->sc_handle, "_CRS",
106	    &res, &acpi_resource_parse_ops_default);
107	if (ACPI_FAILURE(rv))
108		return;
109
110	mem = acpi_res_mem(&res, 0);
111	if (mem == NULL) {
112		aprint_error_dev(self, "couldn't find mem resource\n");
113		goto done;
114	}
115
116	irq = acpi_res_irq(&res, 0);
117	if (irq == NULL) {
118		aprint_error_dev(self, "couldn't find irq resource\n");
119		goto done;
120	}
121
122	sc->sc_size = mem->ar_length;
123	sc->iot = aa->aa_memt;
124	error = bus_space_map(sc->iot, mem->ar_base, mem->ar_length, 0, &sc->ioh);
125	if (error) {
126		aprint_error_dev(self, "couldn't map registers\n");
127		return;
128	}
129
130	/* Disable interrupts */
131	sc->sc_offs = EREAD1(sc, EHCI_CAPLENGTH);
132	EOWRITE4(sc, EHCI_USBINTR, 0);
133
134	ih = acpi_intr_establish(self, (uint64_t)aa->aa_node->ad_handle,
135	    IPL_USB, true, ehci_intr, sc, device_xname(self));
136	if (ih == NULL) {
137		aprint_error_dev(self, "couldn't establish interrupt\n");
138		return;
139	}
140
141	error = ehci_init(sc);
142	if (error) {
143		aprint_error_dev(self, "init failed, error = %d\n", error);
144		return;
145	}
146
147	sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint);
148
149done:
150	acpi_resource_cleanup(&res);
151}
152
153static void
154ehci_acpi_init(struct ehci_softc *sc)
155{
156	struct ehci_acpi_softc * const asc = (struct ehci_acpi_softc *)sc;
157
158	acpi_usb_post_reset(asc->sc_handle);
159}
160