1 /* $NetBSD: bcm2835_dwctwo.c,v 1.12 2021/08/07 16:18:43 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2013 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Nick Hudson
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: bcm2835_dwctwo.c,v 1.12 2021/08/07 16:18:43 thorpej Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/device.h>
38 #include <sys/mutex.h>
39 #include <sys/bus.h>
40 #include <sys/workqueue.h>
41
42 #include <arm/broadcom/bcm2835reg.h>
43
44 #include <dev/fdt/fdtvar.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 <dwc2/dwc2var.h>
52
53 #include <dwc2/dwc2.h>
54 #include "dwc2_core.h"
55
56 struct bcmdwc2_softc {
57 struct dwc2_softc sc_dwc2;
58
59 void *sc_ih;
60 int sc_phandle;
61 };
62
63 static struct dwc2_core_params bcmdwc2_params = {
64 .otg_cap = 0, /* HNP/SRP capable */
65 .otg_ver = 0, /* 1.3 */
66 .dma_enable = 1,
67 .dma_desc_enable = 0,
68 .speed = 0, /* High Speed */
69 .enable_dynamic_fifo = 1,
70 .en_multiple_tx_fifo = 1,
71 .host_rx_fifo_size = 774, /* 774 DWORDs */
72 .host_nperio_tx_fifo_size = 256, /* 256 DWORDs */
73 .host_perio_tx_fifo_size = 512, /* 512 DWORDs */
74 .max_transfer_size = 65535,
75 .max_packet_count = 511,
76 .host_channels = 8,
77 .phy_type = 1, /* UTMI */
78 .phy_utmi_width = 8, /* 8 bits */
79 .phy_ulpi_ddr = 0, /* Single */
80 .phy_ulpi_ext_vbus = 0,
81 .i2c_enable = 0,
82 .ulpi_fs_ls = 0,
83 .host_support_fs_ls_low_power = 0,
84 .host_ls_low_power_phy_clk = 0, /* 48 MHz */
85 .ts_dline = 0,
86 .reload_ctl = 0,
87 .ahbcfg = 0x10,
88 .uframe_sched = 1,
89 .external_id_pin_ctl = -1,
90 .hibernation = -1,
91 };
92
93 static int bcmdwc2_match(device_t, struct cfdata *, void *);
94 static void bcmdwc2_attach(device_t, device_t, void *);
95 static void bcmdwc2_deferred(device_t);
96
97 CFATTACH_DECL_NEW(bcmdwctwo, sizeof(struct bcmdwc2_softc),
98 bcmdwc2_match, bcmdwc2_attach, NULL, NULL);
99
100 static const struct device_compatible_entry compat_data[] = {
101 { .compat = "brcm,bcm2708-usb" },
102 { .compat = "brcm,bcm2835-usb" },
103 DEVICE_COMPAT_EOL
104 };
105
106 /* ARGSUSED */
107 static int
bcmdwc2_match(device_t parent,struct cfdata * match,void * aux)108 bcmdwc2_match(device_t parent, struct cfdata *match, void *aux)
109 {
110 struct fdt_attach_args * const faa = aux;
111
112 return of_compatible_match(faa->faa_phandle, compat_data);
113 }
114
115 /* ARGSUSED */
116 static void
bcmdwc2_attach(device_t parent,device_t self,void * aux)117 bcmdwc2_attach(device_t parent, device_t self, void *aux)
118 {
119 struct bcmdwc2_softc *sc = device_private(self);
120 struct fdt_attach_args * const faa = aux;
121 const int phandle = faa->faa_phandle;
122 bus_addr_t addr;
123 bus_size_t size;
124 int error;
125
126 aprint_naive(": USB controller\n");
127 aprint_normal(": USB controller\n");
128
129 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
130 aprint_error(": couldn't get registers\n");
131 return;
132 }
133
134 sc->sc_phandle = phandle;
135 sc->sc_dwc2.sc_dev = self;
136 sc->sc_dwc2.sc_iot = faa->faa_bst;
137 sc->sc_dwc2.sc_bus.ub_dmatag = faa->faa_dmat;
138 sc->sc_dwc2.sc_params = &bcmdwc2_params;
139
140 error = bus_space_map(faa->faa_bst, addr, size, 0, &sc->sc_dwc2.sc_ioh);
141 if (error) {
142 aprint_error(": couldn't map device\n");
143 return;
144 }
145
146 char intrstr[128];
147 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
148 aprint_error(": failed to decode interrupt\n");
149 return;
150 }
151
152 sc->sc_ih = fdtbus_intr_establish_xname(phandle, 0, IPL_VM, FDT_INTR_MPSAFE,
153 dwc2_intr, &sc->sc_dwc2, device_xname(self));
154
155 if (sc->sc_ih == NULL) {
156 aprint_error_dev(self, "failed to establish interrupt %s\n",
157 intrstr);
158 goto fail;
159 }
160 aprint_normal_dev(self, "interrupting on %s\n", intrstr);
161 config_interrupts(self, bcmdwc2_deferred);
162
163 return;
164
165 fail:
166 if (sc->sc_ih) {
167 fdtbus_intr_disestablish(sc->sc_phandle, sc->sc_ih);
168 sc->sc_ih = NULL;
169 }
170 bus_space_unmap(sc->sc_dwc2.sc_iot, sc->sc_dwc2.sc_ioh, size);
171 }
172
173 static void
bcmdwc2_deferred(device_t self)174 bcmdwc2_deferred(device_t self)
175 {
176 struct bcmdwc2_softc *sc = device_private(self);
177 int error;
178
179 error = dwc2_init(&sc->sc_dwc2);
180 if (error != 0) {
181 aprint_error_dev(self, "couldn't initialize host, error=%d\n",
182 error);
183 return;
184 }
185 sc->sc_dwc2.sc_child = config_found(sc->sc_dwc2.sc_dev,
186 &sc->sc_dwc2.sc_bus, usbctlprint, CFARGS_NONE);
187 }
188