1 /* $NetBSD: ehci_fdt.c,v 1.8 2021/08/07 16:19:10 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2015-2017 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_fdt.c,v 1.8 2021/08/07 16:19:10 thorpej Exp $");
31
32 #include <sys/param.h>
33 #include <sys/bus.h>
34 #include <sys/device.h>
35 #include <sys/intr.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38
39 #include <dev/usb/usb.h>
40 #include <dev/usb/usbdi.h>
41 #include <dev/usb/usbdivar.h>
42 #include <dev/usb/usb_mem.h>
43 #include <dev/usb/ehcireg.h>
44 #include <dev/usb/ehcivar.h>
45
46 #include <dev/fdt/fdtvar.h>
47
48 static int ehci_fdt_match(device_t, cfdata_t, void *);
49 static void ehci_fdt_attach(device_t, device_t, void *);
50
51 CFATTACH_DECL2_NEW(ehci_fdt, sizeof(struct ehci_softc),
52 ehci_fdt_match, ehci_fdt_attach, NULL,
53 ehci_activate, NULL, ehci_childdet);
54
55 static const struct device_compatible_entry compat_data[] = {
56 { .compat = "generic-ehci" },
57 DEVICE_COMPAT_EOL
58 };
59
60 static int
ehci_fdt_match(device_t parent,cfdata_t cf,void * aux)61 ehci_fdt_match(device_t parent, cfdata_t cf, void *aux)
62 {
63 struct fdt_attach_args * const faa = aux;
64
65 return of_compatible_match(faa->faa_phandle, compat_data);
66 }
67
68 static void
ehci_fdt_attach(device_t parent,device_t self,void * aux)69 ehci_fdt_attach(device_t parent, device_t self, void *aux)
70 {
71 struct ehci_softc * const sc = device_private(self);
72 struct fdt_attach_args * const faa = aux;
73 const int phandle = faa->faa_phandle;
74 struct fdtbus_reset *rst;
75 struct fdtbus_phy *phy;
76 struct clk *clk;
77 char intrstr[128];
78 bus_addr_t addr;
79 bus_size_t size;
80 int error;
81 void *ih;
82 u_int n;
83
84 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
85 aprint_error(": couldn't get registers\n");
86 return;
87 }
88
89 /* Enable clocks */
90 for (n = 0; (clk = fdtbus_clock_get_index(phandle, n)) != NULL; n++)
91 if (clk_enable(clk) != 0) {
92 aprint_error(": couldn't enable clock #%d\n", n);
93 return;
94 }
95 /* De-assert resets */
96 for (n = 0; (rst = fdtbus_reset_get_index(phandle, n)) != NULL; n++)
97 if (fdtbus_reset_deassert(rst) != 0) {
98 aprint_error(": couldn't de-assert reset #%d\n", n);
99 return;
100 }
101
102 /* Enable optional phy */
103 phy = fdtbus_phy_get(phandle, "usb");
104 if (phy && fdtbus_phy_enable(phy, true) != 0) {
105 aprint_error(": couldn't enable phy\n");
106 return;
107 }
108
109 sc->sc_dev = self;
110 sc->sc_bus.ub_hcpriv = sc;
111 sc->sc_bus.ub_dmatag = faa->faa_dmat;
112 sc->sc_bus.ub_revision = USBREV_2_0;
113 if (of_hasprop(phandle, "has-transaction-translator"))
114 sc->sc_flags |= EHCIF_ETTF;
115 else
116 sc->sc_ncomp = 1;
117 sc->sc_size = size;
118 sc->iot = faa->faa_bst;
119 if (bus_space_map(sc->iot, addr, size, 0, &sc->ioh) != 0) {
120 aprint_error(": couldn't map registers\n");
121 return;
122 }
123
124 aprint_naive("\n");
125 aprint_normal(": EHCI\n");
126
127 /* Disable interrupts */
128 sc->sc_offs = EREAD1(sc, EHCI_CAPLENGTH);
129 EOWRITE4(sc, EHCI_USBINTR, 0);
130
131 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
132 aprint_error_dev(self, "failed to decode interrupt\n");
133 return;
134 }
135
136 ih = fdtbus_intr_establish_xname(phandle, 0, IPL_USB, FDT_INTR_MPSAFE,
137 ehci_intr, sc, device_xname(self));
138 if (ih == NULL) {
139 aprint_error_dev(self, "couldn't establish interrupt on %s\n",
140 intrstr);
141 return;
142 }
143 aprint_normal_dev(self, "interrupting on %s\n", intrstr);
144
145 error = ehci_init(sc);
146 if (error) {
147 aprint_error_dev(self, "init failed, error = %d\n", error);
148 return;
149 }
150
151 pmf_device_register1(self, NULL, NULL, ehci_shutdown);
152
153 sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint, CFARGS_NONE);
154 }
155