1 /* $NetBSD: ehci_arbus.c,v 1.10 2021/08/07 16:18:59 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Matt Thomas of 3am Software Foundry.
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_arbus.c,v 1.10 2021/08/07 16:18:59 thorpej Exp $");
34
35 #include "locators.h"
36
37 #include <sys/param.h>
38 #include <sys/bus.h>
39 #include <sys/device.h>
40 #include <sys/systm.h>
41
42 #include <mips/locore.h>
43 #include <mips/atheros/include/ar9344reg.h>
44 #include <mips/atheros/include/arbusvar.h>
45
46 #include <dev/usb/usb.h>
47 #include <dev/usb/usbdi.h>
48 #include <dev/usb/usbdivar.h>
49 #include <dev/usb/usb_mem.h>
50
51 #include <dev/usb/ehcireg.h>
52 #include <dev/usb/ehcivar.h>
53
54 /*
55 * This is relative to the start of the unreserved registers in USB controller
56 * block and not the full USB block which would be 0x1a8.
57 */
58 #define ARBUS_USBMODE 0xa8 /* USB mode */
59 #define USBMODE_CM __BITS(0,1) /* Controller Mode */
60 #define USBMODE_CM_IDLE __SHIFTIN(0,USBMODE_CM) /* Idle (both) */
61 #define USBMODE_CM_DEVICE __SHIFTIN(2,USBMODE_CM) /* Device Controller */
62 #define USBMODE_CM_HOST __SHIFTIN(3,USBMODE_CM) /* Host Controller */
63
64 static int ehci_arbus_match(device_t, cfdata_t, void *);
65 static void ehci_arbus_attach(device_t, device_t, void *);
66
67 CFATTACH_DECL_NEW(ehci_arbus, sizeof (ehci_softc_t),
68 ehci_arbus_match, ehci_arbus_attach, NULL, NULL);
69
70 static void ehci_arbus_init(struct ehci_softc *);
71
72 int
ehci_arbus_match(device_t parent,cfdata_t cf,void * aux)73 ehci_arbus_match(device_t parent, cfdata_t cf, void *aux)
74 {
75 struct arbus_attach_args *aa = aux;
76
77 if (strcmp(aa->aa_name, cf->cf_name) != 0)
78 return 0;
79
80 if (badaddr((void *)MIPS_PHYS_TO_KSEG1(aa->aa_addr), 4))
81 return 0;
82
83 return 1; /* XXX */
84 }
85
86 void
ehci_arbus_attach(device_t parent,device_t self,void * aux)87 ehci_arbus_attach(device_t parent, device_t self, void *aux)
88 {
89 ehci_softc_t *sc = device_private(self);
90 struct arbus_attach_args * const aa = aux;
91 void *ih = NULL;
92 int error;
93
94 sc->iot = aa->aa_bst_le;
95 sc->sc_size = aa->aa_size;
96 //sc->sc_bus.ub_hcpriv = sc;
97 sc->sc_bus.ub_dmatag = aa->aa_dmat;
98 sc->sc_bus.ub_revision = USBREV_1_0;
99 sc->sc_flags |= EHCIF_ETTF;
100 sc->sc_vendor_init = ehci_arbus_init;
101
102 error = bus_space_map(aa->aa_bst, aa->aa_addr, aa->aa_size, 0,
103 &sc->ioh);
104
105 if (error) {
106 aprint_error(": failed to map registers: %d\n", error);
107 return;
108 }
109
110 /* The recommended value is 0x20 for both ports and the host */
111 REGVAL(AR9344_USB_CONFIG_BASE) = 0x20c00; /* magic */
112 DELAY(1000);
113
114 /* get offset to operational regs */
115 uint32_t r = bus_space_read_4(aa->aa_bst, sc->ioh, 0);
116 if (r != 0x40) {
117 aprint_error(": error: CAPLENGTH (%#x) != 0x40\n", sc->sc_offs);
118 return;
119 }
120
121 sc->sc_offs = EREAD1(sc, EHCI_CAPLENGTH);
122
123 aprint_normal("\n");
124
125 /* Disable EHCI interrupts */
126 EOWRITE4(sc, EHCI_USBINTR, 0);
127
128 /* establish interrupt */
129 ih = arbus_intr_establish(aa->aa_cirq, aa->aa_mirq, ehci_intr, sc);
130 if (ih == NULL)
131 panic("%s: couldn't establish interrupt",
132 device_xname(self));
133
134 /*
135 * There are no companion controllers
136 */
137 sc->sc_ncomp = 0;
138
139 error = ehci_init(sc);
140 if (error) {
141 aprint_error("%s: init failed, error=%d\n", device_xname(self),
142 error);
143 if (ih != NULL)
144 arbus_intr_disestablish(ih);
145 return;
146 }
147
148 /* Attach USB device */
149 sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint, CFARGS_NONE);
150 }
151
152 static void
ehci_arbus_init(struct ehci_softc * sc)153 ehci_arbus_init(struct ehci_softc *sc)
154 {
155 /* Set host mode */
156 uint32_t old = bus_space_read_4(sc->iot, sc->ioh, ARBUS_USBMODE);
157 uint32_t reg = old;
158
159 reg &= ~USBMODE_CM;
160 reg |= USBMODE_CM_HOST;
161 if (reg != old)
162 bus_space_write_4(sc->iot, sc->ioh, ARBUS_USBMODE, reg);
163
164 }
165