1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2019 Emmanuel Vadot <[email protected]>
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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/bus.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
37
38 #include <dev/ofw/ofw_bus.h>
39 #include <dev/ofw/ofw_bus_subr.h>
40
41 #include <dev/extres/syscon/syscon.h>
42 #include <dev/extres/regulator/regulator.h>
43
44 #include "syscon_if.h"
45
46 #define RK3288_GRF_IO_VSEL 0x380
47 #define RK3399_GRF_IO_VSEL 0xe640
48 #define RK3399_PMUGRF_SOC_CON0 0x180
49
50 struct rk_iodomain_supply {
51 char *name;
52 uint32_t bit;
53 };
54
55 struct rk_iodomain_softc;
56
57 struct rk_iodomain_conf {
58 struct rk_iodomain_supply *supply;
59 int nsupply;
60 uint32_t grf_reg;
61 void (*init)(struct rk_iodomain_softc *sc);
62 };
63
64 struct rk_iodomain_softc {
65 device_t dev;
66 struct syscon *grf;
67 phandle_t node;
68 struct rk_iodomain_conf *conf;
69 };
70
71 static struct rk_iodomain_supply rk3288_supply[] = {
72 {"lcdc-supply", 0},
73 {"dvp-supply", 1},
74 {"flash0-supply", 2},
75 {"flash1-supply", 3},
76 {"wifi-supply", 4},
77 {"bb-supply", 5},
78 {"audio-supply", 6},
79 {"sdcard-supply", 7},
80 {"gpio30-supply", 8},
81 {"gpio1830-supply", 9},
82 };
83
84 static struct rk_iodomain_conf rk3288_conf = {
85 .supply = rk3288_supply,
86 .nsupply = nitems(rk3288_supply),
87 .grf_reg = RK3288_GRF_IO_VSEL,
88 };
89
90 static struct rk_iodomain_supply rk3399_supply[] = {
91 {"bt656-supply", 0},
92 {"audio-supply", 1},
93 {"sdmmc-supply", 2},
94 {"gpio1830-supply", 3},
95 };
96
97 static struct rk_iodomain_conf rk3399_conf = {
98 .supply = rk3399_supply,
99 .nsupply = nitems(rk3399_supply),
100 .grf_reg = RK3399_GRF_IO_VSEL,
101 };
102
103 static struct rk_iodomain_supply rk3399_pmu_supply[] = {
104 {"pmu1830-supply", 9},
105 };
106
107 static void rk3399_pmu_init(struct rk_iodomain_softc *sc);
108 static struct rk_iodomain_conf rk3399_pmu_conf = {
109 .supply = rk3399_pmu_supply,
110 .nsupply = nitems(rk3399_pmu_supply),
111 .grf_reg = RK3399_PMUGRF_SOC_CON0,
112 .init = rk3399_pmu_init,
113 };
114
115 static struct ofw_compat_data compat_data[] = {
116 {"rockchip,rk3288-io-voltage-domain", (uintptr_t)&rk3288_conf},
117 {"rockchip,rk3399-io-voltage-domain", (uintptr_t)&rk3399_conf},
118 {"rockchip,rk3399-pmu-io-voltage-domain", (uintptr_t)&rk3399_pmu_conf},
119 {NULL, 0}
120 };
121
122 static void
rk3399_pmu_init(struct rk_iodomain_softc * sc)123 rk3399_pmu_init(struct rk_iodomain_softc *sc)
124 {
125
126 SYSCON_WRITE_4(sc->grf, RK3399_PMUGRF_SOC_CON0,
127 (1 << 8) | (1 << (8 + 16))); /* set pmu1830_volsel */
128 }
129
130 static void
rk_iodomain_set(struct rk_iodomain_softc * sc)131 rk_iodomain_set(struct rk_iodomain_softc *sc)
132 {
133 regulator_t supply;
134 uint32_t reg = 0;
135 uint32_t mask = 0;
136 int uvolt, i;
137
138 for (i = 0; i < sc->conf->nsupply; i++) {
139 mask |= (1 << sc->conf->supply[i].bit) << 16;
140 if (regulator_get_by_ofw_property(sc->dev, sc->node,
141 sc->conf->supply[i].name, &supply) == 0) {
142 if (regulator_get_voltage(supply, &uvolt) == 0) {
143 if (uvolt == 1800000)
144 reg |= (1 << sc->conf->supply[i].bit);
145 else if (uvolt != 3000000)
146 device_printf(sc->dev,
147 "%s regulator is at %duV, ignoring\n",
148 sc->conf->supply[i].name, uvolt);
149 } else
150 device_printf(sc->dev, "Cannot get current "
151 "voltage for regulator %s\n",
152 sc->conf->supply[i].name);
153 }
154 }
155
156 SYSCON_WRITE_4(sc->grf, sc->conf->grf_reg, reg | mask);
157 if (sc->conf->init != NULL)
158 sc->conf->init(sc);
159 }
160
161 static int
rk_iodomain_probe(device_t dev)162 rk_iodomain_probe(device_t dev)
163 {
164
165 if (!ofw_bus_status_okay(dev))
166 return (ENXIO);
167
168 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
169 return (ENXIO);
170
171 device_set_desc(dev, "RockChip IO Voltage Domain");
172 return (BUS_PROBE_DEFAULT);
173 }
174
175 static int
rk_iodomain_attach(device_t dev)176 rk_iodomain_attach(device_t dev)
177 {
178 struct rk_iodomain_softc *sc;
179 int rv;
180
181 sc = device_get_softc(dev);
182 sc->dev = dev;
183 sc->node = ofw_bus_get_node(dev);
184
185 rv = syscon_get_handle_default(dev, &sc->grf);
186 if (rv != 0) {
187 device_printf(dev, "Cannot get grf handle\n");
188 return (ENXIO);
189 }
190
191 sc->conf = (struct rk_iodomain_conf *)ofw_bus_search_compatible(dev, compat_data)->ocd_data;
192 rk_iodomain_set(sc);
193
194 return (0);
195 }
196
197 static int
rk_iodomain_detach(device_t dev)198 rk_iodomain_detach(device_t dev)
199 {
200
201 return (0);
202 }
203
204 static device_method_t rk_iodomain_methods[] = {
205 /* Device interface */
206 DEVMETHOD(device_probe, rk_iodomain_probe),
207 DEVMETHOD(device_attach, rk_iodomain_attach),
208 DEVMETHOD(device_detach, rk_iodomain_detach),
209
210 DEVMETHOD_END
211 };
212
213 static driver_t rk_iodomain_driver = {
214 "rk_iodomain",
215 rk_iodomain_methods,
216 sizeof(struct rk_iodomain_softc),
217 };
218
219 static devclass_t rk_iodomain_devclass;
220
221 EARLY_DRIVER_MODULE(rk_iodomain, simplebus, rk_iodomain_driver,
222 rk_iodomain_devclass, 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
223