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-hs-ipq4019-phy", 1},
51 {NULL, 0},
52 };
53
54 struct ipq4018_usb_hs_phy_softc {
55 device_t dev;
56 };
57
58 struct ipq4018_usb_hs_phynode_sc {
59 struct phynode_usb_sc usb_sc;
60 int mode;
61 hwreset_t por_rst;
62 hwreset_t srif_rst;
63 };
64
65 static int
ipq4018_usb_hs_phynode_phy_enable(struct phynode * phynode,bool enable)66 ipq4018_usb_hs_phynode_phy_enable(struct phynode *phynode, bool enable)
67 {
68 struct ipq4018_usb_hs_phynode_sc *sc;
69 device_t dev;
70 int rv;
71
72 dev = phynode_get_device(phynode);
73 sc = phynode_get_softc(phynode);
74
75 /*
76 *
77 * For power-off - assert por, sleep for 10ms, assert srif,
78 * sleep for 10ms
79 */
80 rv = hwreset_assert(sc->por_rst);
81 if (rv != 0)
82 goto done;
83 DELAY(10*1000);
84 rv = hwreset_assert(sc->srif_rst);
85 if (rv != 0)
86 goto done;
87 DELAY(10*1000);
88
89 /*
90 * For power-on - power off first, then deassert srif, then
91 * sleep for 10ms, then deassert por.
92 */
93 if (enable) {
94 rv = hwreset_deassert(sc->srif_rst);
95 if (rv != 0)
96 goto done;
97 DELAY(10*1000);
98 rv = hwreset_deassert(sc->por_rst);
99 if (rv != 0)
100 goto done;
101 DELAY(10*1000);
102 }
103
104 done:
105 if (rv != 0) {
106 device_printf(dev, "%s: failed, rv=%d\n", __func__, rv);
107 }
108 return (rv);
109 }
110
111 /* Phy controller class and methods. */
112 static phynode_method_t ipq4018_usb_hs_phynode_methods[] = {
113 PHYNODEUSBMETHOD(phynode_enable, ipq4018_usb_hs_phynode_phy_enable),
114 PHYNODEUSBMETHOD_END
115 };
116 DEFINE_CLASS_1(ipq4018_usb_hs_phynode, ipq4018_usb_hs_phynode_class,
117 ipq4018_usb_hs_phynode_methods,
118 sizeof(struct ipq4018_usb_hs_phynode_sc), phynode_usb_class);
119
120 static int
ipq4018_usb_hs_usbphy_init_phy(struct ipq4018_usb_hs_phy_softc * sc,phandle_t node)121 ipq4018_usb_hs_usbphy_init_phy(struct ipq4018_usb_hs_phy_softc *sc,
122 phandle_t node)
123 {
124 struct phynode *phynode;
125 struct phynode_init_def phy_init;
126 struct ipq4018_usb_hs_phynode_sc *phy_sc;
127 int rv;
128 hwreset_t por_rst = NULL, srif_rst = NULL;
129
130 /* FDT resources */
131 rv = hwreset_get_by_ofw_name(sc->dev, node, "por_rst", &por_rst);
132 if (rv != 0 && rv != ENOENT) {
133 device_printf(sc->dev, "Cannot get 'por_rst' reset\n");
134 goto fail;
135 }
136 rv = hwreset_get_by_ofw_name(sc->dev, node, "srif_rst", &srif_rst);
137 if (rv != 0 && rv != ENOENT) {
138 device_printf(sc->dev, "Cannot get 'srif_rst' reset\n");
139 goto fail;
140 }
141
142 /* Create and register phy. */
143 bzero(&phy_init, sizeof(phy_init));
144 phy_init.id = 1;
145 phy_init.ofw_node = node;
146 phynode = phynode_create(sc->dev, &ipq4018_usb_hs_phynode_class,
147 &phy_init);
148 if (phynode == NULL) {
149 device_printf(sc->dev, "Cannot create phy.\n");
150 return (ENXIO);
151 }
152
153 phy_sc = phynode_get_softc(phynode);
154 phy_sc->por_rst = por_rst;
155 phy_sc->srif_rst = srif_rst;
156
157 if (phynode_register(phynode) == NULL) {
158 device_printf(sc->dev, "Cannot register phy.\n");
159 return (ENXIO);
160 }
161
162 (void) ipq4018_usb_hs_phynode_phy_enable(phynode, true);
163
164 return (0);
165
166 fail:
167 if (por_rst != NULL)
168 hwreset_release(por_rst);
169 if (srif_rst != NULL)
170 hwreset_release(srif_rst);
171
172 return (ENXIO);
173 }
174
175 static int
ipq4018_usb_hs_usbphy_probe(device_t dev)176 ipq4018_usb_hs_usbphy_probe(device_t dev)
177 {
178
179 if (!ofw_bus_status_okay(dev))
180 return (ENXIO);
181
182 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
183 return (ENXIO);
184
185 device_set_desc(dev, "IPQ4018/IPQ4019 USB HS PHY");
186 return (BUS_PROBE_DEFAULT);
187 }
188
189 static int
ipq4018_usb_hs_usbphy_attach(device_t dev)190 ipq4018_usb_hs_usbphy_attach(device_t dev)
191 {
192 struct ipq4018_usb_hs_phy_softc *sc;
193 phandle_t node;
194 int rv;
195
196 sc = device_get_softc(dev);
197 sc->dev = dev;
198 node = ofw_bus_get_node(sc->dev);
199
200 rv = ipq4018_usb_hs_usbphy_init_phy(sc, node);
201 if (rv != 0)
202 goto fail;
203 bus_attach_children(dev);
204 return (0);
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