1 /* $NetBSD: meson_thermal.c,v 1.7 2024/02/07 04:20:26 msaitoh Exp $ */
2
3 /*
4 * Copyright (c) 2021 Ryo Shimizu
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
17 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
25 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: meson_thermal.c,v 1.7 2024/02/07 04:20:26 msaitoh Exp $");
31
32 #include <sys/param.h>
33 #include <sys/types.h>
34 #include <sys/bus.h>
35 #include <sys/device.h>
36
37 #include <dev/fdt/fdtvar.h>
38 #include <dev/sysmon/sysmonvar.h>
39
40 #define TS_CFG_REG1 0x01
41 #define TS_CFG_REG1_ANA_EN_VCM __BIT(10)
42 #define TS_CFG_REG1_ANA_EN_VBG __BIT(9)
43 #define TS_CFG_REG1_FILTER_EN __BIT(5)
44 #define TS_CFG_REG1_DEM_EN __BIT(3)
45 #define TS_CFG_REG1_ANA_CH_SEL __BITS(2,0)
46 #define TS_CFG_REG2 0x02
47 #define TS_CFG_REG3 0x03
48 #define TS_CFG_REG4 0x04
49 #define TS_CFG_REG5 0x05
50 #define TS_CFG_REG6 0x06
51 #define TS_CFG_REG7 0x07
52 #define TS_STAT0_REG 0x10
53 #define TS_STAT0_FILTER_OUT __BITS(15,0)
54 #define TS_STAT1_REG 0x11
55 #define TS_STAT2_REG 0x12
56 #define TS_STAT3_REG 0x13
57 #define TS_STAT4_REG 0x14
58 #define TS_STAT5_REG 0x15
59 #define TS_STAT6_REG 0x16
60 #define TS_STAT7_REG 0x17
61 #define TS_STAT8_REG 0x18
62 #define TS_STAT9_REG 0x19
63
64 #define THERMAL_READ_REG(sc, reg) \
65 bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg) * 4)
66 #define THERMAL_WRITE_REG(sc, reg, val) \
67 bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg) * 4, (val))
68
69 #define AOSECURE_READ(sc, reg) \
70 bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh_ao, (reg))
71 #define AOSECURE_WRITE(sc, reg, val) \
72 bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh_ao, (reg), (val))
73
74
75 struct meson_thermal_config {
76 const char *name;
77 bus_size_t aosec_reg;
78 };
79
80 static struct meson_thermal_config thermal_cpu_conf = {
81 .name = "CPU",
82 .aosec_reg = 0x128
83 };
84
85 static struct meson_thermal_config thermal_ddr_conf = {
86 .name = "DDR",
87 .aosec_reg = 0xf0
88 };
89
90 static const struct device_compatible_entry compat_data[] = {
91 { .compat = "amlogic,g12a-cpu-thermal", .data = &thermal_cpu_conf },
92 { .compat = "amlogic,g12a-ddr-thermal", .data = &thermal_ddr_conf },
93 DEVICE_COMPAT_EOL
94 };
95
96 struct meson_thermal_softc {
97 device_t sc_dev;
98 bus_space_tag_t sc_bst;
99 bus_space_handle_t sc_bsh;
100 bus_space_handle_t sc_bsh_ao;
101 const struct meson_thermal_config *sc_conf;
102 int sc_phandle;
103 int sc_ao_calib;
104
105 struct sysmon_envsys *sc_sme;
106 envsys_data_t sc_sensor_temp;
107 };
108
109
110 static void
meson_thermal_init(struct meson_thermal_softc * sc)111 meson_thermal_init(struct meson_thermal_softc *sc)
112 {
113 uint32_t val;
114
115 val = THERMAL_READ_REG(sc, TS_CFG_REG1);
116 val |= TS_CFG_REG1_ANA_EN_VCM;
117 val |= TS_CFG_REG1_ANA_EN_VBG;
118 val |= TS_CFG_REG1_FILTER_EN;
119 val |= TS_CFG_REG1_DEM_EN;
120 val &= ~TS_CFG_REG1_ANA_CH_SEL;
121 val |= __SHIFTIN(3, TS_CFG_REG1_ANA_CH_SEL);
122 THERMAL_WRITE_REG(sc, TS_CFG_REG1, val);
123
124 /* read calibration value in ao-secure */
125 #define TS_AO_CALIB_VERSION_MASK __BITS(31,24)
126 #define TS_AO_CALIB_SIGN_MASK __BIT(15)
127 #define TS_AO_CALIB_TEMP_MASK __BITS(14,0)
128 val = AOSECURE_READ(sc, sc->sc_conf->aosec_reg);
129 if ((val & TS_AO_CALIB_VERSION_MASK) != 0) {
130 sc->sc_ao_calib = (val & TS_AO_CALIB_TEMP_MASK);
131 if ((val & TS_AO_CALIB_SIGN_MASK) != 0)
132 sc->sc_ao_calib *= -1;
133 } else {
134 sc->sc_ao_calib = 0;
135 }
136 }
137
138 static int
meson_get_temperature(struct meson_thermal_softc * sc)139 meson_get_temperature(struct meson_thermal_softc *sc)
140 {
141 int val, temp;
142 int64_t factor, uptat;
143
144 val = THERMAL_READ_REG(sc, TS_STAT0_REG) & TS_STAT0_FILTER_OUT;
145
146 #define CALIB_A 9411
147 #define CALIB_B 3159
148 #define CALIB_m_1024 4342 /* 4.24 */
149 #define CALIB_n_1024 3318 /* 3.24 */
150
151 factor = (val * CALIB_n_1024) / 1024;
152 uptat = (val * CALIB_m_1024) / 1024;
153
154 uptat = (uptat * (1 << 16)) / ((1 << 16) + factor);
155 temp = ((uptat + sc->sc_ao_calib) * CALIB_A);
156 temp = (temp - (CALIB_B * (1 << 16))) * 100000LL / (1 << 16);
157
158 return temp; /* microcelsius */
159 }
160
161 static void
meson_thermal_refresh(struct sysmon_envsys * sme,envsys_data_t * edata)162 meson_thermal_refresh(struct sysmon_envsys *sme, envsys_data_t *edata)
163 {
164 struct meson_thermal_softc *sc = sme->sme_cookie;
165
166 edata->value_cur = meson_get_temperature(sc) + 273150000;
167 edata->state = ENVSYS_SVALID;
168 }
169
170 static int
meson_thermal_match(device_t parent,cfdata_t cf,void * aux)171 meson_thermal_match(device_t parent, cfdata_t cf, void *aux)
172 {
173 struct fdt_attach_args * const faa = aux;
174
175 return of_compatible_match(faa->faa_phandle, compat_data);
176 }
177
178 static void
meson_thermal_attach(device_t parent,device_t self,void * aux)179 meson_thermal_attach(device_t parent, device_t self, void *aux)
180 {
181 struct meson_thermal_softc * const sc = device_private(self);
182 struct fdt_attach_args * const faa = aux;
183 bus_addr_t addr;
184 bus_size_t size, aosize;
185 int phandle, phandle_aosec;
186
187 sc->sc_dev = self;
188 sc->sc_bst = faa->faa_bst;
189 sc->sc_phandle = phandle = faa->faa_phandle;
190 sc->sc_conf = of_compatible_lookup(phandle, compat_data)->data;
191
192 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
193 aprint_error(": couldn't get registers\n");
194 goto attach_failure0;
195 }
196 if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
197 aprint_error(": couldn't map registers\n");
198 goto attach_failure0;
199 }
200
201 phandle_aosec = fdtbus_get_phandle(phandle, "amlogic,ao-secure");
202 if (fdtbus_get_reg(phandle_aosec, 0, &addr, &aosize) != 0) {
203 aprint_error(": couldn't get registers\n");
204 goto attach_failure1;
205 }
206 if (bus_space_map(sc->sc_bst, addr, aosize, 0, &sc->sc_bsh_ao) != 0) {
207 aprint_error(": couldn't map registers\n");
208 goto attach_failure1;
209 }
210
211 if (fdtbus_clock_enable_index(phandle, 0, true) != 0) {
212 aprint_error(": couldn't enable clock\n");
213 goto attach_failure2;
214 }
215
216 meson_thermal_init(sc);
217
218 aprint_naive("\n");
219 aprint_normal(": %s TEMP Sensor\n", sc->sc_conf->name);
220
221 sc->sc_sme = sysmon_envsys_create();
222 sc->sc_sme->sme_name = device_xname(self);
223 sc->sc_sme->sme_cookie = sc;
224 sc->sc_sme->sme_flags = 0;
225 sc->sc_sme->sme_events_timeout = 1;
226 sc->sc_sme->sme_refresh = meson_thermal_refresh;
227 sc->sc_sensor_temp.units = ENVSYS_STEMP;
228 sc->sc_sensor_temp.state = ENVSYS_SINVALID;
229 snprintf(sc->sc_sensor_temp.desc, ENVSYS_DESCLEN,
230 "%s", sc->sc_conf->name);
231
232 sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor_temp);
233 sysmon_envsys_register(sc->sc_sme);
234
235 meson_thermal_refresh(sc->sc_sme, &sc->sc_sensor_temp);
236 return;
237
238 attach_failure2:
239 bus_space_unmap(sc->sc_bst, sc->sc_bsh_ao, aosize);
240 attach_failure1:
241 bus_space_unmap(sc->sc_bst, sc->sc_bsh, size);
242 attach_failure0:
243 return;
244 }
245
246 CFATTACH_DECL_NEW(meson_thermal, sizeof(struct meson_thermal_softc),
247 meson_thermal_match, meson_thermal_attach, NULL, NULL);
248