1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2019 Emmanuel Vadot <manu@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
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/bus.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34
35 #include <dev/ofw/ofw_bus.h>
36 #include <dev/ofw/ofw_bus_subr.h>
37
38 #include <dev/syscon/syscon.h>
39 #include <dev/regulator/regulator.h>
40
41 #include "syscon_if.h"
42
43 #define RK3288_GRF_IO_VSEL 0x380
44 #define RK3399_GRF_IO_VSEL 0xe640
45 #define RK3399_PMUGRF_SOC_CON0 0x180
46 #define RK3568_PMUGRF_IO_VSEL0 0x0140
47 #define RK3568_PMUGRF_IO_VSEL1 0x0144
48 #define RK3568_PMUGRF_IO_VSEL2 0x0148
49
50 #define MAX_1V8 1850000
51
52 enum rk_iodomain_type {
53 RK3328 = 1,
54 RK3399,
55 RK3568,
56 };
57
58 struct rk_iodomain_supply {
59 char *name;
60 uint32_t bit;
61 };
62
63 struct rk_iodomain_softc;
64
65 struct rk_iodomain_conf {
66 struct rk_iodomain_supply *supply;
67 int nsupply;
68 uint32_t grf_reg;
69 void (*init)(struct rk_iodomain_softc *sc);
70 enum rk_iodomain_type type;
71 };
72
73 struct rk_iodomain_softc {
74 device_t dev;
75 struct syscon *grf;
76 phandle_t node;
77 struct rk_iodomain_conf *conf;
78 };
79
80 static struct rk_iodomain_supply rk3288_supply[] = {
81 {"lcdc-supply", 0},
82 {"dvp-supply", 1},
83 {"flash0-supply", 2},
84 {"flash1-supply", 3},
85 {"wifi-supply", 4},
86 {"bb-supply", 5},
87 {"audio-supply", 6},
88 {"sdcard-supply", 7},
89 {"gpio30-supply", 8},
90 {"gpio1830-supply", 9},
91 };
92
93 static struct rk_iodomain_conf rk3288_conf = {
94 .supply = rk3288_supply,
95 .nsupply = nitems(rk3288_supply),
96 .grf_reg = RK3288_GRF_IO_VSEL,
97 .type = RK3328,
98 };
99
100 static struct rk_iodomain_supply rk3399_supply[] = {
101 {"bt656-supply", 0},
102 {"audio-supply", 1},
103 {"sdmmc-supply", 2},
104 {"gpio1830-supply", 3},
105 };
106
107 static struct rk_iodomain_conf rk3399_conf = {
108 .supply = rk3399_supply,
109 .nsupply = nitems(rk3399_supply),
110 .grf_reg = RK3399_GRF_IO_VSEL,
111 .type = RK3399,
112 };
113
114 static struct rk_iodomain_supply rk3399_pmu_supply[] = {
115 {"pmu1830-supply", 9},
116 };
117
118 static void rk3399_pmu_init(struct rk_iodomain_softc *sc);
119 static struct rk_iodomain_conf rk3399_pmu_conf = {
120 .supply = rk3399_pmu_supply,
121 .nsupply = nitems(rk3399_pmu_supply),
122 .grf_reg = RK3399_PMUGRF_SOC_CON0,
123 .init = rk3399_pmu_init,
124 .type = RK3399,
125 };
126
127 static struct rk_iodomain_supply rk3568_pmu_supply[] = {
128 {"pmuio1-supply", 0},
129 {"pmuio2-supply", 1},
130 {"vccio1-supply", 1},
131 {"vccio2-supply", 2},
132 {"vccio3-supply", 3},
133 {"vccio4-supply", 4},
134 {"vccio5-supply", 5},
135 {"vccio6-supply", 6},
136 {"vccio7-supply", 7},
137 };
138 static struct rk_iodomain_conf rk3568_pmu_conf = {
139 .supply = rk3568_pmu_supply,
140 .nsupply = nitems(rk3568_pmu_supply),
141 .type = RK3568,
142 };
143
144 static struct ofw_compat_data compat_data[] = {
145 {"rockchip,rk3288-io-voltage-domain", (uintptr_t)&rk3288_conf},
146 {"rockchip,rk3399-io-voltage-domain", (uintptr_t)&rk3399_conf},
147 {"rockchip,rk3399-pmu-io-voltage-domain", (uintptr_t)&rk3399_pmu_conf},
148 {"rockchip,rk3568-pmu-io-voltage-domain", (uintptr_t)&rk3568_pmu_conf},
149 {NULL, 0}
150 };
151
152 static void
rk3399_pmu_init(struct rk_iodomain_softc * sc)153 rk3399_pmu_init(struct rk_iodomain_softc *sc)
154 {
155
156 SYSCON_WRITE_4(sc->grf, RK3399_PMUGRF_SOC_CON0,
157 (1 << 8) | (1 << (8 + 16))); /* set pmu1830_volsel */
158 }
159
160 static int
rk_iodomain_set(struct rk_iodomain_softc * sc)161 rk_iodomain_set(struct rk_iodomain_softc *sc)
162 {
163 regulator_t supply;
164 uint32_t reg = 0;
165 uint32_t mask = 0;
166 int uvolt, i;
167
168 for (i = 0; i < sc->conf->nsupply; i++) {
169 if (regulator_get_by_ofw_property(sc->dev, sc->node,
170 sc->conf->supply[i].name, &supply) != 0) {
171 device_printf(sc->dev,
172 "Cannot get property for regulator %s\n",
173 sc->conf->supply[i].name);
174 return (ENXIO);
175 }
176
177 if (regulator_get_voltage(supply, &uvolt) != 0) {
178 device_printf(sc->dev,
179 "Cannot get current voltage for regulator %s\n",
180 sc->conf->supply[i].name);
181 return (ENXIO);
182 }
183
184 if (sc->conf->type != RK3568) {
185 /* RK3328 and RK3399 iodomain */
186 mask |= (1 << sc->conf->supply[i].bit) << 16;
187 if (uvolt == 1800000)
188 reg |= (1 << sc->conf->supply[i].bit);
189 else if (uvolt != 3000000)
190 device_printf(sc->dev,
191 "%s regulator is at %duV, ignoring\n",
192 sc->conf->supply[i].name, uvolt);
193 } else {
194 /* RK3568 iodomain */
195 if (bootverbose) {
196 device_printf(sc->dev,
197 "Setting regulator %s voltage=%duV\n",
198 sc->conf->supply[i].name, uvolt);
199 }
200 switch(i) {
201 case 0: /* pmuio1 */
202 break;
203 case 1: /* pmuio2 */
204 SYSCON_WRITE_4(sc->grf, RK3568_PMUGRF_IO_VSEL2,
205 (1 << (sc->conf->supply[i].bit + 16)) |
206 (uvolt > MAX_1V8 ?
207 0 : 1 << sc->conf->supply[i].bit));
208 SYSCON_WRITE_4(sc->grf, RK3568_PMUGRF_IO_VSEL2,
209 (1 << (sc->conf->supply[i].bit + 4 + 16)) |
210 (uvolt > MAX_1V8 ?
211 1 << (sc->conf->supply[i].bit + 4) : 0));
212 case 3: /* vccio2 */
213 break;
214 case 2: /* vccio1 */
215 case 4: /* vccio3 */
216 case 5: /* vccio4 */
217 case 6: /* vccio5 */
218 case 7: /* vccio6 */
219 case 8: /* vccio7 */
220 SYSCON_WRITE_4(sc->grf, RK3568_PMUGRF_IO_VSEL0,
221 (1 << (sc->conf->supply[i].bit + 16)) |
222 (uvolt > MAX_1V8 ?
223 0 : 1 << sc->conf->supply[i].bit));
224 SYSCON_WRITE_4(sc->grf, RK3568_PMUGRF_IO_VSEL1,
225 (1 << (sc->conf->supply[i].bit + 16)) |
226 (uvolt > MAX_1V8 ?
227 1 << sc->conf->supply[i].bit : 0));
228 break;
229 default:
230 device_printf(sc->dev, "Index out of range\n");
231 }
232 }
233 }
234 if (sc->conf->type != RK3568)
235 SYSCON_WRITE_4(sc->grf, sc->conf->grf_reg, reg | mask);
236 if (sc->conf->init != NULL)
237 sc->conf->init(sc);
238
239 return (0);
240 }
241
242 static int
rk_iodomain_probe(device_t dev)243 rk_iodomain_probe(device_t dev)
244 {
245
246 if (!ofw_bus_status_okay(dev))
247 return (ENXIO);
248
249 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
250 return (ENXIO);
251
252 device_set_desc(dev, "RockChip IO Voltage Domain");
253 return (BUS_PROBE_DEFAULT);
254 }
255
256 static int
rk_iodomain_attach(device_t dev)257 rk_iodomain_attach(device_t dev)
258 {
259 struct rk_iodomain_softc *sc;
260 int rv;
261
262 sc = device_get_softc(dev);
263 sc->dev = dev;
264 sc->node = ofw_bus_get_node(dev);
265
266 rv = syscon_get_handle_default(dev, &sc->grf);
267 if (rv != 0) {
268 device_printf(dev, "Cannot get grf handle\n");
269 return (ENXIO);
270 }
271
272 sc->conf = (struct rk_iodomain_conf *)ofw_bus_search_compatible(dev, compat_data)->ocd_data;
273 rv = rk_iodomain_set(sc);
274
275 return (rv);
276 }
277
278 static int
rk_iodomain_detach(device_t dev)279 rk_iodomain_detach(device_t dev)
280 {
281
282 return (0);
283 }
284
285 static device_method_t rk_iodomain_methods[] = {
286 /* Device interface */
287 DEVMETHOD(device_probe, rk_iodomain_probe),
288 DEVMETHOD(device_attach, rk_iodomain_attach),
289 DEVMETHOD(device_detach, rk_iodomain_detach),
290
291 DEVMETHOD_END
292 };
293
294 static driver_t rk_iodomain_driver = {
295 "rk_iodomain",
296 rk_iodomain_methods,
297 sizeof(struct rk_iodomain_softc),
298 };
299
300 EARLY_DRIVER_MODULE(rk_iodomain, simplebus, rk_iodomain_driver, 0, 0,
301 BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LAST);
302