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/cdefs.h>
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/bus.h>
32 #include <sys/gpio.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35 #include <sys/malloc.h>
36 #include <sys/rman.h>
37
38 #include <machine/bus.h>
39
40 #include <dev/extres/hwreset/hwreset.h>
41 #include <dev/extres/phy/phy_usb.h>
42 #include <dev/extres/regulator/regulator.h>
43 #include <dev/ofw/ofw_bus.h>
44 #include <dev/ofw/ofw_bus_subr.h>
45
46 #include <dev/fdt/simple_mfd.h>
47 #include "phynode_if.h"
48 #include "phynode_usb_if.h"
49
50 static struct ofw_compat_data compat_data[] = {
51 {"qcom,usb-hs-ipq4019-phy", 1},
52 {NULL, 0},
53 };
54
55 struct ipq4018_usb_hs_phy_softc {
56 device_t dev;
57 };
58
59 struct ipq4018_usb_hs_phynode_sc {
60 struct phynode_usb_sc usb_sc;
61 int mode;
62 hwreset_t por_rst;
63 hwreset_t srif_rst;
64 };
65
66 static int
ipq4018_usb_hs_phynode_phy_enable(struct phynode * phynode,bool enable)67 ipq4018_usb_hs_phynode_phy_enable(struct phynode *phynode, bool enable)
68 {
69 struct ipq4018_usb_hs_phynode_sc *sc;
70 device_t dev;
71 int rv;
72
73 dev = phynode_get_device(phynode);
74 sc = phynode_get_softc(phynode);
75
76 /*
77 *
78 * For power-off - assert por, sleep for 10ms, assert srif,
79 * sleep for 10ms
80 */
81 rv = hwreset_assert(sc->por_rst);
82 if (rv != 0)
83 goto done;
84 DELAY(10*1000);
85 rv = hwreset_assert(sc->srif_rst);
86 if (rv != 0)
87 goto done;
88 DELAY(10*1000);
89
90 /*
91 * For power-on - power off first, then deassert srif, then
92 * sleep for 10ms, then deassert por.
93 */
94 if (enable) {
95 rv = hwreset_deassert(sc->srif_rst);
96 if (rv != 0)
97 goto done;
98 DELAY(10*1000);
99 rv = hwreset_deassert(sc->por_rst);
100 if (rv != 0)
101 goto done;
102 DELAY(10*1000);
103 }
104
105 done:
106 if (rv != 0) {
107 device_printf(dev, "%s: failed, rv=%d\n", __func__, rv);
108 }
109 return (rv);
110 }
111
112 /* Phy controller class and methods. */
113 static phynode_method_t ipq4018_usb_hs_phynode_methods[] = {
114 PHYNODEUSBMETHOD(phynode_enable, ipq4018_usb_hs_phynode_phy_enable),
115 PHYNODEUSBMETHOD_END
116 };
117 DEFINE_CLASS_1(ipq4018_usb_hs_phynode, ipq4018_usb_hs_phynode_class,
118 ipq4018_usb_hs_phynode_methods,
119 sizeof(struct ipq4018_usb_hs_phynode_sc), phynode_usb_class);
120
121 static int
ipq4018_usb_hs_usbphy_init_phy(struct ipq4018_usb_hs_phy_softc * sc,phandle_t node)122 ipq4018_usb_hs_usbphy_init_phy(struct ipq4018_usb_hs_phy_softc *sc,
123 phandle_t node)
124 {
125 struct phynode *phynode;
126 struct phynode_init_def phy_init;
127 struct ipq4018_usb_hs_phynode_sc *phy_sc;
128 int rv;
129 hwreset_t por_rst = NULL, srif_rst = NULL;
130
131 /* FDT resources */
132 rv = hwreset_get_by_ofw_name(sc->dev, node, "por_rst", &por_rst);
133 if (rv != 0 && rv != ENOENT) {
134 device_printf(sc->dev, "Cannot get 'por_rst' reset\n");
135 goto fail;
136 }
137 rv = hwreset_get_by_ofw_name(sc->dev, node, "srif_rst", &srif_rst);
138 if (rv != 0 && rv != ENOENT) {
139 device_printf(sc->dev, "Cannot get 'srif_rst' reset\n");
140 goto fail;
141 }
142
143 /* Create and register phy. */
144 bzero(&phy_init, sizeof(phy_init));
145 phy_init.id = 1;
146 phy_init.ofw_node = node;
147 phynode = phynode_create(sc->dev, &ipq4018_usb_hs_phynode_class,
148 &phy_init);
149 if (phynode == NULL) {
150 device_printf(sc->dev, "Cannot create phy.\n");
151 return (ENXIO);
152 }
153
154 phy_sc = phynode_get_softc(phynode);
155 phy_sc->por_rst = por_rst;
156 phy_sc->srif_rst = srif_rst;
157
158 if (phynode_register(phynode) == NULL) {
159 device_printf(sc->dev, "Cannot register phy.\n");
160 return (ENXIO);
161 }
162
163 (void) ipq4018_usb_hs_phynode_phy_enable(phynode, true);
164
165 return (0);
166
167 fail:
168 if (por_rst != NULL)
169 hwreset_release(por_rst);
170 if (srif_rst != NULL)
171 hwreset_release(srif_rst);
172
173 return (ENXIO);
174 }
175
176 static int
ipq4018_usb_hs_usbphy_probe(device_t dev)177 ipq4018_usb_hs_usbphy_probe(device_t dev)
178 {
179
180 if (!ofw_bus_status_okay(dev))
181 return (ENXIO);
182
183 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
184 return (ENXIO);
185
186 device_set_desc(dev, "IPQ4018/IPQ4019 USB HS PHY");
187 return (BUS_PROBE_DEFAULT);
188 }
189
190 static int
ipq4018_usb_hs_usbphy_attach(device_t dev)191 ipq4018_usb_hs_usbphy_attach(device_t dev)
192 {
193 struct ipq4018_usb_hs_phy_softc *sc;
194 phandle_t node;
195 int rv;
196
197 sc = device_get_softc(dev);
198 sc->dev = dev;
199 node = ofw_bus_get_node(sc->dev);
200
201 rv = ipq4018_usb_hs_usbphy_init_phy(sc, node);
202 if (rv != 0)
203 goto fail;
204 return (bus_generic_attach(dev));
205
206 fail:
207 return (ENXIO);
208 }
209
210 static int
ipq4018_usb_hs_usbphy_detach(device_t dev)211 ipq4018_usb_hs_usbphy_detach(device_t dev)
212 {
213
214 return (0);
215 }
216
217 static device_method_t ipq4018_usb_hs_usbphy_methods[] = {
218 /* Device interface */
219 DEVMETHOD(device_probe, ipq4018_usb_hs_usbphy_probe),
220 DEVMETHOD(device_attach, ipq4018_usb_hs_usbphy_attach),
221 DEVMETHOD(device_detach, ipq4018_usb_hs_usbphy_detach),
222 DEVMETHOD_END
223 };
224
225 static DEFINE_CLASS_0(ipq4018_usb_hs_usbphy, ipq4018_usb_hs_usbphy_driver,
226 ipq4018_usb_hs_usbphy_methods,
227 sizeof(struct ipq4018_usb_hs_phy_softc));
228 EARLY_DRIVER_MODULE(ipq4018_usb_hs_usbphy, simplebus,
229 ipq4018_usb_hs_usbphy_driver, NULL, NULL,
230 BUS_PASS_TIMER + BUS_PASS_ORDER_LAST);
231