1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2019 Michal Meloun <mmel@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/bus.h>
31 #include <sys/gpio.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/malloc.h>
35 #include <sys/rman.h>
36
37 #include <machine/bus.h>
38
39 #include <dev/hwreset/hwreset.h>
40 #include <dev/phy/phy_usb.h>
41 #include <dev/regulator/regulator.h>
42 #include <dev/ofw/ofw_bus.h>
43 #include <dev/ofw/ofw_bus_subr.h>
44
45 #include <dev/fdt/simple_mfd.h>
46 #include "phynode_if.h"
47 #include "phynode_usb_if.h"
48
49 static struct ofw_compat_data compat_data[] = {
50 {"qcom,usb-ss-ipq4019-phy", 1},
51 {NULL, 0},
52 };
53
54 struct ipq4018_usb_ss_phy_softc {
55 device_t dev;
56 };
57
58 struct ipq4018_usb_ss_phynode_sc {
59 struct phynode_usb_sc usb_sc;
60 int mode;
61 hwreset_t por_rst;
62 };
63
64 static int
ipq4018_usb_ss_phynode_phy_enable(struct phynode * phynode,bool enable)65 ipq4018_usb_ss_phynode_phy_enable(struct phynode *phynode, bool enable)
66 {
67 struct ipq4018_usb_ss_phynode_sc *sc;
68 device_t dev;
69 int rv;
70
71 dev = phynode_get_device(phynode);
72 sc = phynode_get_softc(phynode);
73
74 /*
75 * For power-off - assert por, sleep for 10ms
76 */
77 rv = hwreset_assert(sc->por_rst);
78 if (rv != 0)
79 goto done;
80 DELAY(10*1000);
81
82 /*
83 * For power-on - power off first, then deassert por.
84 */
85 if (enable) {
86 rv = hwreset_deassert(sc->por_rst);
87 if (rv != 0)
88 goto done;
89 DELAY(10*1000);
90 }
91
92 done:
93 if (rv != 0) {
94 device_printf(dev, "%s: failed, rv=%d\n", __func__, rv);
95 }
96 return (rv);
97 }
98
99 /* Phy controller class and methods. */
100 static phynode_method_t ipq4018_usb_ss_phynode_methods[] = {
101 PHYNODEUSBMETHOD(phynode_enable, ipq4018_usb_ss_phynode_phy_enable),
102 PHYNODEUSBMETHOD_END
103 };
104 DEFINE_CLASS_1(ipq4018_usb_ss_phynode, ipq4018_usb_ss_phynode_class,
105 ipq4018_usb_ss_phynode_methods,
106 sizeof(struct ipq4018_usb_ss_phynode_sc), phynode_usb_class);
107
108 static int
ipq4018_usb_ss_usbphy_init_phy(struct ipq4018_usb_ss_phy_softc * sc,phandle_t node)109 ipq4018_usb_ss_usbphy_init_phy(struct ipq4018_usb_ss_phy_softc *sc,
110 phandle_t node)
111 {
112 struct phynode *phynode;
113 struct phynode_init_def phy_init;
114 struct ipq4018_usb_ss_phynode_sc *phy_sc;
115 int rv;
116 hwreset_t por_rst = NULL;
117
118 /* FDT resources */
119 rv = hwreset_get_by_ofw_name(sc->dev, node, "por_rst", &por_rst);
120 if (rv != 0 && rv != ENOENT) {
121 device_printf(sc->dev, "Cannot get 'por_rst' reset\n");
122 goto fail;
123 }
124
125 /* Create and register phy. */
126 bzero(&phy_init, sizeof(phy_init));
127 phy_init.id = 1;
128 phy_init.ofw_node = node;
129 phynode = phynode_create(sc->dev, &ipq4018_usb_ss_phynode_class,
130 &phy_init);
131 if (phynode == NULL) {
132 device_printf(sc->dev, "Cannot create phy.\n");
133 return (ENXIO);
134 }
135
136 phy_sc = phynode_get_softc(phynode);
137 phy_sc->por_rst = por_rst;
138
139 if (phynode_register(phynode) == NULL) {
140 device_printf(sc->dev, "Cannot register phy.\n");
141 return (ENXIO);
142 }
143
144 (void) ipq4018_usb_ss_phynode_phy_enable(phynode, true);
145
146 return (0);
147
148 fail:
149 if (por_rst != NULL)
150 hwreset_release(por_rst);
151
152 return (ENXIO);
153 }
154
155 static int
ipq4018_usb_ss_usbphy_probe(device_t dev)156 ipq4018_usb_ss_usbphy_probe(device_t dev)
157 {
158
159 if (!ofw_bus_status_okay(dev))
160 return (ENXIO);
161
162 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
163 return (ENXIO);
164
165 device_set_desc(dev, "IPQ4018/IPQ4019 USB SS PHY");
166 return (BUS_PROBE_DEFAULT);
167 }
168
169 static int
ipq4018_usb_ss_usbphy_attach(device_t dev)170 ipq4018_usb_ss_usbphy_attach(device_t dev)
171 {
172 struct ipq4018_usb_ss_phy_softc *sc;
173 phandle_t node;
174 int rv;
175
176 sc = device_get_softc(dev);
177 sc->dev = dev;
178 node = ofw_bus_get_node(sc->dev);
179
180 rv = ipq4018_usb_ss_usbphy_init_phy(sc, node);
181 if (rv != 0)
182 goto fail;
183 return (bus_generic_attach(dev));
184
185 fail:
186 return (ENXIO);
187 }
188
189 static int
ipq4018_usb_ss_usbphy_detach(device_t dev)190 ipq4018_usb_ss_usbphy_detach(device_t dev)
191 {
192
193 return (0);
194 }
195
196 static device_method_t ipq4018_usb_ss_usbphy_methods[] = {
197 /* Device interface */
198 DEVMETHOD(device_probe, ipq4018_usb_ss_usbphy_probe),
199 DEVMETHOD(device_attach, ipq4018_usb_ss_usbphy_attach),
200 DEVMETHOD(device_detach, ipq4018_usb_ss_usbphy_detach),
201 DEVMETHOD_END
202 };
203
204 static DEFINE_CLASS_0(ipq4018_usb_ss_usbphy, ipq4018_usb_ss_usbphy_driver,
205 ipq4018_usb_ss_usbphy_methods,
206 sizeof(struct ipq4018_usb_ss_phy_softc));
207 EARLY_DRIVER_MODULE(ipq4018_usb_ss_usbphy, simplebus,
208 ipq4018_usb_ss_usbphy_driver, NULL, NULL,
209 BUS_PASS_TIMER + BUS_PASS_ORDER_LAST);
210