1 /* $NetBSD: ti_ehci.c,v 1.5 2021/08/07 16:18:46 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2015-2019 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: ti_ehci.c,v 1.5 2021/08/07 16:18:46 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 #define TI_EHCI_NPORTS 3
49
50 static int ti_ehci_match(device_t, cfdata_t, void *);
51 static void ti_ehci_attach(device_t, device_t, void *);
52
53 CFATTACH_DECL2_NEW(ti_ehci, sizeof(struct ehci_softc),
54 ti_ehci_match, ti_ehci_attach, NULL,
55 ehci_activate, NULL, ehci_childdet);
56
57 static const struct device_compatible_entry compat_data[] = {
58 { .compat = "ti,ehci-omap" },
59 DEVICE_COMPAT_EOL
60 };
61
62 static int
ti_ehci_match(device_t parent,cfdata_t cf,void * aux)63 ti_ehci_match(device_t parent, cfdata_t cf, void *aux)
64 {
65 struct fdt_attach_args * const faa = aux;
66
67 return of_compatible_match(faa->faa_phandle, compat_data);
68 }
69
70 static void
ti_ehci_attach(device_t parent,device_t self,void * aux)71 ti_ehci_attach(device_t parent, device_t self, void *aux)
72 {
73 struct ehci_softc * const sc = device_private(self);
74 struct fdt_attach_args * const faa = aux;
75 const int phandle = faa->faa_phandle;
76 struct fdtbus_reset *rst;
77 struct fdtbus_phy *phy;
78 struct clk *clk;
79 char intrstr[128];
80 bus_addr_t addr;
81 bus_size_t size;
82 int error;
83 void *ih;
84 u_int n;
85
86 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
87 aprint_error(": couldn't get registers\n");
88 return;
89 }
90
91 /* Enable clocks */
92 for (n = 0; (clk = fdtbus_clock_get_index(phandle, n)) != NULL; n++)
93 if (clk_enable(clk) != 0) {
94 aprint_error(": couldn't enable clock #%d\n", n);
95 return;
96 }
97 /* De-assert resets */
98 for (n = 0; (rst = fdtbus_reset_get_index(phandle, n)) != NULL; n++)
99 if (fdtbus_reset_deassert(rst) != 0) {
100 aprint_error(": couldn't de-assert reset #%d\n", n);
101 return;
102 }
103
104 sc->sc_dev = self;
105 sc->sc_bus.ub_hcpriv = sc;
106 sc->sc_bus.ub_dmatag = faa->faa_dmat;
107 sc->sc_bus.ub_revision = USBREV_2_0;
108 if (of_hasprop(phandle, "has-transaction-translator"))
109 sc->sc_flags |= EHCIF_ETTF;
110 else
111 sc->sc_ncomp = 1;
112 sc->sc_size = size;
113 sc->iot = faa->faa_bst;
114 if (bus_space_map(sc->iot, addr, size, 0, &sc->ioh) != 0) {
115 aprint_error(": couldn't map registers\n");
116 return;
117 }
118
119 aprint_naive("\n");
120 aprint_normal(": EHCI\n");
121
122 /* Enable PHYs */
123 for (n = 0; n < TI_EHCI_NPORTS; n++) {
124 phy = fdtbus_phy_get_index(phandle, n);
125 if (phy && fdtbus_phy_enable(phy, true) != 0) {
126 aprint_error(": couldn't enable phy\n");
127 return;
128 }
129 }
130
131 /* Disable interrupts */
132 sc->sc_offs = EREAD1(sc, EHCI_CAPLENGTH);
133 EOWRITE4(sc, EHCI_USBINTR, 0);
134
135 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
136 aprint_error_dev(self, "failed to decode interrupt\n");
137 return;
138 }
139
140 ih = fdtbus_intr_establish_xname(phandle, 0, IPL_USB, FDT_INTR_MPSAFE,
141 ehci_intr, sc, device_xname(self));
142 if (ih == NULL) {
143 aprint_error_dev(self, "couldn't establish interrupt on %s\n",
144 intrstr);
145 return;
146 }
147 aprint_normal_dev(self, "interrupting on %s\n", intrstr);
148
149 error = ehci_init(sc);
150 if (error) {
151 aprint_error_dev(self, "init failed, error = %d\n", error);
152 return;
153 }
154
155 pmf_device_register1(self, NULL, NULL, ehci_shutdown);
156
157 sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint, CFARGS_NONE);
158 }
159