1 /* $NetBSD: obio_ehci.c,v 1.7 2021/08/07 16:18:44 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 2001, 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Lennart Augustsson (lennart@augustsson.net).
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: obio_ehci.c,v 1.7 2021/08/07 16:18:44 thorpej Exp $");
34
35 #include "locators.h"
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/device.h>
41 #include <sys/proc.h>
42 #include <sys/queue.h>
43
44 #include <sys/bus.h>
45
46 #include <arm/gemini/gemini_reg.h>
47 #include <arm/gemini/gemini_obiovar.h>
48
49 #include <dev/usb/usb.h>
50 #include <dev/usb/usbdi.h>
51 #include <dev/usb/usbdivar.h>
52 #include <dev/usb/usb_mem.h>
53
54 #include <dev/usb/ehcireg.h>
55 #include <dev/usb/ehcivar.h>
56
57 #ifdef EHCI_DEBUG
58 #define DPRINTF(x) if (ehcidebug) printf x
59 extern int ehcidebug;
60 #else
61 #define DPRINTF(x)
62 #endif
63
64 #define EHCI_HCOTGDEV_INTR_STATUS 0xc0
65 #define EHCI_HCOTGDEV_INTR_MASK 0xc4
66 #define HC_INT 0x04
67 #define OTG_INT 0x02
68 #define DEV_INT 0x01
69
70 static int
ehci_obio_intr(void * arg)71 ehci_obio_intr(void *arg)
72 {
73 struct ehci_softc * const sc = arg;
74 int rv = 0;
75 uint32_t v;
76
77 v = bus_space_read_4(sc->iot, sc->ioh, EHCI_HCOTGDEV_INTR_STATUS);
78 bus_space_write_4(sc->iot, sc->ioh, EHCI_HCOTGDEV_INTR_STATUS, v);
79 if (v & HC_INT)
80 rv = ehci_intr(sc);
81 return rv;
82 }
83
84 static int
ehci_obio_match(device_t parent,cfdata_t match,void * aux)85 ehci_obio_match(device_t parent, cfdata_t match, void *aux)
86 {
87 struct obio_attach_args * const obio = aux;
88
89 if (obio->obio_addr == GEMINI_USB0_BASE
90 || obio->obio_addr == GEMINI_USB1_BASE)
91 return 1;
92
93 return 0;
94 }
95
96 static void
ehci_obio_attach(device_t parent,device_t self,void * aux)97 ehci_obio_attach(device_t parent, device_t self, void *aux)
98 {
99 struct ehci_softc * const sc = device_private(self);
100 struct obio_attach_args * const obio = aux;
101 const char * const devname = device_xname(self);
102
103 sc->sc_dev = self;
104 sc->sc_bus.ub_hcpriv = sc;
105 sc->iot = obio->obio_iot;
106
107 aprint_naive(": EHCI USB controller\n");
108 aprint_normal(": EHCI USB controller\n");
109
110 /* Map I/O registers */
111 if (bus_space_map(sc->iot, obio->obio_addr, obio->obio_size, 0,
112 &sc->ioh)) {
113 aprint_error("%s: can't map memory space\n", devname);
114 return;
115 }
116
117 sc->sc_bus.ub_dmatag = obio->obio_dmat;
118
119 /* Disable interrupts, so we don't get any spurious ones. */
120 sc->sc_offs = EREAD1(sc, EHCI_CAPLENGTH);
121 DPRINTF(("%s: offs=%d\n", devname, sc->sc_offs));
122 EOWRITE4(sc, EHCI_USBINTR, 0);
123 bus_space_write_4(sc->iot, sc->ioh, EHCI_HCOTGDEV_INTR_MASK,
124 OTG_INT|DEV_INT);
125
126 if (obio->obio_intr != OBIOCF_INTR_DEFAULT) {
127 intr_establish(obio->obio_intr, IPL_USB, IST_LEVEL,
128 ehci_obio_intr, sc);
129 }
130
131 sc->sc_bus.ub_revision = USBREV_2_0;
132
133 int err = ehci_init(sc);
134 if (err) {
135 aprint_error("%s: init failed, error=%d\n", devname, err);
136 return;
137 }
138
139 /* Attach usb device. */
140 sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint, CFARGS_NONE);
141 }
142
143 CFATTACH_DECL2_NEW(ehci_obio, sizeof(struct ehci_softc),
144 ehci_obio_match, ehci_obio_attach, NULL, NULL, NULL, ehci_childdet);
145