1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/bus.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35
36 #include <dev/ofw/ofw_bus.h>
37 #include <dev/ofw/ofw_bus_subr.h>
38
39 #include <dev/extres/syscon/syscon.h>
40 #include <dev/extres/regulator/regulator.h>
41
42 #include "syscon_if.h"
43
44 #define RK3288_GRF_IO_VSEL 0x380
45 #define RK3399_GRF_IO_VSEL 0xe640
46 #define RK3399_PMUGRF_SOC_CON0 0x180
47 #define RK3568_PMUGRF_IO_VSEL0 0x0140
48 #define RK3568_PMUGRF_IO_VSEL1 0x0144
49 #define RK3568_PMUGRF_IO_VSEL2 0x0148
50
51 #define MAX_1V8 1850000
52
53 enum rk_iodomain_type {
54 RK3328 = 1,
55 RK3399,
56 RK3568,
57 };
58
59 struct rk_iodomain_supply {
60 char *name;
61 uint32_t bit;
62 };
63
64 struct rk_iodomain_softc;
65
66 struct rk_iodomain_conf {
67 struct rk_iodomain_supply *supply;
68 int nsupply;
69 uint32_t grf_reg;
70 void (*init)(struct rk_iodomain_softc *sc);
71 enum rk_iodomain_type type;
72 };
73
74 struct rk_iodomain_softc {
75 device_t dev;
76 struct syscon *grf;
77 phandle_t node;
78 struct rk_iodomain_conf *conf;
79 };
80
81 static struct rk_iodomain_supply rk3288_supply[] = {
82 {"lcdc-supply", 0},
83 {"dvp-supply", 1},
84 {"flash0-supply", 2},
85 {"flash1-supply", 3},
86 {"wifi-supply", 4},
87 {"bb-supply", 5},
88 {"audio-supply", 6},
89 {"sdcard-supply", 7},
90 {"gpio30-supply", 8},
91 {"gpio1830-supply", 9},
92 };
93
94 static struct rk_iodomain_conf rk3288_conf = {
95 .supply = rk3288_supply,
96 .nsupply = nitems(rk3288_supply),
97 .grf_reg = RK3288_GRF_IO_VSEL,
98 .type = RK3328,
99 };
100
101 static struct rk_iodomain_supply rk3399_supply[] = {
102 {"bt656-supply", 0},
103 {"audio-supply", 1},
104 {"sdmmc-supply", 2},
105 {"gpio1830-supply", 3},
106 };
107
108 static struct rk_iodomain_conf rk3399_conf = {
109 .supply = rk3399_supply,
110 .nsupply = nitems(rk3399_supply),
111 .grf_reg = RK3399_GRF_IO_VSEL,
112 .type = RK3399,
113 };
114
115 static struct rk_iodomain_supply rk3399_pmu_supply[] = {
116 {"pmu1830-supply", 9},
117 };
118
119 static void rk3399_pmu_init(struct rk_iodomain_softc *sc);
120 static struct rk_iodomain_conf rk3399_pmu_conf = {
121 .supply = rk3399_pmu_supply,
122 .nsupply = nitems(rk3399_pmu_supply),
123 .grf_reg = RK3399_PMUGRF_SOC_CON0,
124 .init = rk3399_pmu_init,
125 .type = RK3399,
126 };
127
128 static struct rk_iodomain_supply rk3568_pmu_supply[] = {
129 {"pmuio1-supply", 0},
130 {"pmuio2-supply", 1},
131 {"vccio1-supply", 1},
132 {"vccio2-supply", 2},
133 {"vccio3-supply", 3},
134 {"vccio4-supply", 4},
135 {"vccio5-supply", 5},
136 {"vccio6-supply", 6},
137 {"vccio7-supply", 7},
138 };
139 static struct rk_iodomain_conf rk3568_pmu_conf = {
140 .supply = rk3568_pmu_supply,
141 .nsupply = nitems(rk3568_pmu_supply),
142 .type = RK3568,
143 };
144
145 static struct ofw_compat_data compat_data[] = {
146 {"rockchip,rk3288-io-voltage-domain", (uintptr_t)&rk3288_conf},
147 {"rockchip,rk3399-io-voltage-domain", (uintptr_t)&rk3399_conf},
148 {"rockchip,rk3399-pmu-io-voltage-domain", (uintptr_t)&rk3399_pmu_conf},
149 {"rockchip,rk3568-pmu-io-voltage-domain", (uintptr_t)&rk3568_pmu_conf},
150 {NULL, 0}
151 };
152
153 static void
rk3399_pmu_init(struct rk_iodomain_softc * sc)154 rk3399_pmu_init(struct rk_iodomain_softc *sc)
155 {
156
157 SYSCON_WRITE_4(sc->grf, RK3399_PMUGRF_SOC_CON0,
158 (1 << 8) | (1 << (8 + 16))); /* set pmu1830_volsel */
159 }
160
161 static int
rk_iodomain_set(struct rk_iodomain_softc * sc)162 rk_iodomain_set(struct rk_iodomain_softc *sc)
163 {
164 regulator_t supply;
165 uint32_t reg = 0;
166 uint32_t mask = 0;
167 int uvolt, i;
168
169 for (i = 0; i < sc->conf->nsupply; i++) {
170 if (regulator_get_by_ofw_property(sc->dev, sc->node,
171 sc->conf->supply[i].name, &supply) != 0) {
172 device_printf(sc->dev,
173 "Cannot get property for regulator %s\n",
174 sc->conf->supply[i].name);
175 return (ENXIO);
176 }
177
178 if (regulator_get_voltage(supply, &uvolt) != 0) {
179 device_printf(sc->dev,
180 "Cannot get current voltage for regulator %s\n",
181 sc->conf->supply[i].name);
182 return (ENXIO);
183 }
184
185 if (sc->conf->type != RK3568) {
186 /* RK3328 and RK3399 iodomain */
187 mask |= (1 << sc->conf->supply[i].bit) << 16;
188 if (uvolt == 1800000)
189 reg |= (1 << sc->conf->supply[i].bit);
190 else if (uvolt != 3000000)
191 device_printf(sc->dev,
192 "%s regulator is at %duV, ignoring\n",
193 sc->conf->supply[i].name, uvolt);
194 } else {
195 /* RK3568 iodomain */
196 if (bootverbose) {
197 device_printf(sc->dev,
198 "Setting regulator %s voltage=%duV\n",
199 sc->conf->supply[i].name, uvolt);
200 }
201 switch(i) {
202 case 0: /* pmuio1 */
203 break;
204 case 1: /* pmuio2 */
205 SYSCON_WRITE_4(sc->grf, RK3568_PMUGRF_IO_VSEL2,
206 (1 << (sc->conf->supply[i].bit + 16)) |
207 (uvolt > MAX_1V8 ?
208 0 : 1 << sc->conf->supply[i].bit));
209 SYSCON_WRITE_4(sc->grf, RK3568_PMUGRF_IO_VSEL2,
210 (1 << (sc->conf->supply[i].bit + 4 + 16)) |
211 (uvolt > MAX_1V8 ?
212 1 << (sc->conf->supply[i].bit + 4) : 0));
213 case 3: /* vccio2 */
214 break;
215 case 2: /* vccio1 */
216 case 4: /* vccio3 */
217 case 5: /* vccio4 */
218 case 6: /* vccio5 */
219 case 7: /* vccio6 */
220 case 8: /* vccio7 */
221 SYSCON_WRITE_4(sc->grf, RK3568_PMUGRF_IO_VSEL0,
222 (1 << (sc->conf->supply[i].bit + 16)) |
223 (uvolt > MAX_1V8 ?
224 0 : 1 << sc->conf->supply[i].bit));
225 SYSCON_WRITE_4(sc->grf, RK3568_PMUGRF_IO_VSEL1,
226 (1 << (sc->conf->supply[i].bit + 16)) |
227 (uvolt > MAX_1V8 ?
228 1 << sc->conf->supply[i].bit : 0));
229 break;
230 default:
231 device_printf(sc->dev, "Index out of range\n");
232 }
233 }
234 }
235 if (sc->conf->type != RK3568)
236 SYSCON_WRITE_4(sc->grf, sc->conf->grf_reg, reg | mask);
237 if (sc->conf->init != NULL)
238 sc->conf->init(sc);
239
240 return (0);
241 }
242
243 static int
rk_iodomain_probe(device_t dev)244 rk_iodomain_probe(device_t dev)
245 {
246
247 if (!ofw_bus_status_okay(dev))
248 return (ENXIO);
249
250 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
251 return (ENXIO);
252
253 device_set_desc(dev, "RockChip IO Voltage Domain");
254 return (BUS_PROBE_DEFAULT);
255 }
256
257 static int
rk_iodomain_attach(device_t dev)258 rk_iodomain_attach(device_t dev)
259 {
260 struct rk_iodomain_softc *sc;
261 int rv;
262
263 sc = device_get_softc(dev);
264 sc->dev = dev;
265 sc->node = ofw_bus_get_node(dev);
266
267 rv = syscon_get_handle_default(dev, &sc->grf);
268 if (rv != 0) {
269 device_printf(dev, "Cannot get grf handle\n");
270 return (ENXIO);
271 }
272
273 sc->conf = (struct rk_iodomain_conf *)ofw_bus_search_compatible(dev, compat_data)->ocd_data;
274 rv = rk_iodomain_set(sc);
275
276 return (rv);
277 }
278
279 static int
rk_iodomain_detach(device_t dev)280 rk_iodomain_detach(device_t dev)
281 {
282
283 return (0);
284 }
285
286 static device_method_t rk_iodomain_methods[] = {
287 /* Device interface */
288 DEVMETHOD(device_probe, rk_iodomain_probe),
289 DEVMETHOD(device_attach, rk_iodomain_attach),
290 DEVMETHOD(device_detach, rk_iodomain_detach),
291
292 DEVMETHOD_END
293 };
294
295 static driver_t rk_iodomain_driver = {
296 "rk_iodomain",
297 rk_iodomain_methods,
298 sizeof(struct rk_iodomain_softc),
299 };
300
301 EARLY_DRIVER_MODULE(rk_iodomain, simplebus, rk_iodomain_driver, 0, 0,
302 BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LAST);
303