1 /* $OpenBSD: w83795g.c,v 1.2 2022/04/06 18:59:28 naddy Exp $ */
2
3 /*
4 * Copyright (c) 2011 Mark Kettenis
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/param.h>
20 #include <sys/systm.h>
21 #include <sys/device.h>
22 #include <sys/sensors.h>
23
24 #include <dev/i2c/i2cvar.h>
25
26 /* Nuvoton W83795G Hardware Monitor */
27
28 #define NVT_BANKSELECT 0x00
29 #define NVT_CONFIG 0x01
30 #define NVT_CONFIG_48 0x04
31 #define NVT_VOLT_CTRL1 0x02
32 #define NVT_VOLT_CTRL2 0x03
33 #define NVT_TEMP_CTRL1 0x04
34 #define NVT_TEMP_CTRL2 0x05
35 #define NVT_FANIN_CTRL1 0x06
36 #define NVT_FANIN_CTRL2 0x07
37 #define NVT_VSEN1 0x10
38 #define NVT_3VDD 0x1c
39 #define NVT_3VSB 0x1d
40 #define NVT_VBAT 0x1e
41 #define NVT_TR5 0x1f
42 #define NVT_TR6 0x20
43 #define NVT_TD1 0x21
44 #define NVT_TD2 0x22
45 #define NVT_TD3 0x23
46 #define NVT_TD4 0x24
47 #define NVT_FANIN1_COUNT 0x2e
48 #define NVT_VRLSB 0x3c
49
50 /* Voltage */
51 #define NVT_NUM_VOLTS 15
52
53 static const char *nvt_volt_desc[NVT_NUM_VOLTS] = {
54 "", "", "", "", "", "", "", "", "", "", "",
55 "VTT", "3VDD", "3VSB", "VBat"
56 };
57
58 /* Temperature */
59 #define NVT_NUM_TEMPS 6
60 #define NVT_NUM_TR 2
61 #define NVT_NUM_TD 4
62
63 /* Fan */
64 #define NVT_NUM_FANS 14
65
66 #define NVT_NUM_SENSORS (NVT_NUM_VOLTS + NVT_NUM_TEMPS + NVT_NUM_FANS)
67
68 struct nvt_softc {
69 struct device sc_dev;
70 i2c_tag_t sc_tag;
71 i2c_addr_t sc_addr;
72
73 uint16_t sc_vctrl;
74 uint16_t sc_tctrl1, sc_tctrl2;
75 uint16_t sc_fctrl;
76
77 struct ksensor sc_sensors[NVT_NUM_SENSORS];
78 struct ksensordev sc_sensordev;
79 };
80
81
82 int nvt_match(struct device *, void *, void *);
83 void nvt_attach(struct device *, struct device *, void *);
84 void nvt_refresh(void *);
85
86 void nvt_refresh_volts(struct nvt_softc *);
87 void nvt_refresh_temps(struct nvt_softc *);
88 void nvt_refresh_fans(struct nvt_softc *);
89
90 uint8_t nvt_readreg(struct nvt_softc *, uint8_t);
91 void nvt_writereg(struct nvt_softc *, uint8_t, uint8_t);
92
93
94 const struct cfattach nvt_ca = {
95 sizeof(struct nvt_softc), nvt_match, nvt_attach
96 };
97
98 struct cfdriver nvt_cd = {
99 NULL, "nvt", DV_DULL
100 };
101
102
103 int
nvt_match(struct device * parent,void * match,void * aux)104 nvt_match(struct device *parent, void *match, void *aux)
105 {
106 struct i2c_attach_args *ia = aux;
107
108 if (strcmp(ia->ia_name, "w83795g") == 0)
109 return (1);
110 return (0);
111 }
112
113 void
nvt_attach(struct device * parent,struct device * self,void * aux)114 nvt_attach(struct device *parent, struct device *self, void *aux)
115 {
116 struct nvt_softc *sc = (struct nvt_softc *)self;
117 struct i2c_attach_args *ia = aux;
118 uint8_t cfg, vctrl1, vctrl2;
119 uint8_t tctrl1, tctrl2, fctrl1, fctrl2;
120 int i, j;
121
122 sc->sc_tag = ia->ia_tag;
123 sc->sc_addr = ia->ia_addr;
124
125 cfg = nvt_readreg(sc, NVT_CONFIG);
126 if (cfg & NVT_CONFIG_48)
127 printf(": W83795ADG");
128 else
129 printf(": W83795G");
130
131 vctrl1 = nvt_readreg(sc, NVT_VOLT_CTRL1);
132 vctrl2 = nvt_readreg(sc, NVT_VOLT_CTRL2);
133 tctrl1 = nvt_readreg(sc, NVT_TEMP_CTRL1);
134 tctrl2 = nvt_readreg(sc, NVT_TEMP_CTRL2);
135 fctrl1 = nvt_readreg(sc, NVT_FANIN_CTRL1);
136 fctrl2 = nvt_readreg(sc, NVT_FANIN_CTRL2);
137
138 sc->sc_vctrl = vctrl2 << 8 | vctrl1;
139 sc->sc_tctrl1 = tctrl1;
140 sc->sc_tctrl2 = tctrl2;
141 sc->sc_fctrl = fctrl2 << 8 | fctrl1;
142
143 strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
144 sizeof(sc->sc_sensordev.xname));
145
146 for (i = 0; i < NVT_NUM_VOLTS; i++) {
147 strlcpy(sc->sc_sensors[i].desc, nvt_volt_desc[i],
148 sizeof(sc->sc_sensors[i].desc));
149 sc->sc_sensors[i].type = SENSOR_VOLTS_DC;
150 }
151
152 for (j = i + NVT_NUM_TEMPS; i < j; i++)
153 sc->sc_sensors[i].type = SENSOR_TEMP;
154
155 for (j = i + NVT_NUM_FANS; i < j; i++)
156 sc->sc_sensors[i].type = SENSOR_FANRPM;
157
158 for (i = 0; i < NVT_NUM_VOLTS + NVT_NUM_TEMPS + NVT_NUM_FANS; i++)
159 sensor_attach(&sc->sc_sensordev, &sc->sc_sensors[i]);
160
161 if (sensor_task_register(sc, nvt_refresh, 5) == NULL) {
162 printf(", unable to register update task\n");
163 return;
164 }
165
166 sensordev_install(&sc->sc_sensordev);
167 printf("\n");
168 }
169
170 void
nvt_refresh(void * arg)171 nvt_refresh(void *arg)
172 {
173 struct nvt_softc *sc = arg;
174 uint8_t bsr;
175
176 iic_acquire_bus(sc->sc_tag, 0);
177
178 bsr = nvt_readreg(sc, NVT_BANKSELECT);
179 if ((bsr & 0x07) != 0x00)
180 nvt_writereg(sc, NVT_BANKSELECT, bsr & 0xf8);
181
182 nvt_refresh_volts(sc);
183 nvt_refresh_temps(sc);
184 nvt_refresh_fans(sc);
185
186 if ((bsr & 0x07) != 0x00)
187 nvt_writereg(sc, NVT_BANKSELECT, bsr);
188
189 iic_release_bus(sc->sc_tag, 0);
190 }
191
192 void
nvt_refresh_volts(struct nvt_softc * sc)193 nvt_refresh_volts(struct nvt_softc *sc)
194 {
195 struct ksensor *s = &sc->sc_sensors[0];
196 uint8_t vrlsb, data;
197 int i, reg;
198
199 for (i = 0; i < NVT_NUM_VOLTS; i++) {
200 if ((sc->sc_vctrl & (1 << i)) == 0) {
201 s[i].flags |= SENSOR_FINVALID;
202 s[i].value = 0;
203 continue;
204 }
205
206 reg = NVT_VSEN1 + i;
207 data = nvt_readreg(sc, reg);
208 vrlsb = nvt_readreg(sc, NVT_VRLSB);
209 if (reg != NVT_3VDD && reg != NVT_3VSB && reg != NVT_VBAT)
210 s[i].value = 10000000 - ((data << 3) | (vrlsb >> 6)) * 2000;
211 else
212 s[i].value = 10000000 - ((data << 3) | (vrlsb >> 6)) * 6000;
213 s[i].flags &= ~SENSOR_FINVALID;
214 }
215 }
216
217 void
nvt_refresh_temps(struct nvt_softc * sc)218 nvt_refresh_temps(struct nvt_softc *sc)
219 {
220 struct ksensor *s = &sc->sc_sensors[NVT_NUM_VOLTS];
221 uint8_t vrlsb;
222 int8_t data;
223 int i;
224
225 for (i = 0; i < NVT_NUM_TEMPS; i++) {
226 if (i < NVT_NUM_TR
227 && (sc->sc_tctrl1 & (1 << (2 * i))) == 0) {
228 s[i].flags |= SENSOR_FINVALID;
229 s[i].value = 0;
230 continue;
231 }
232
233 if (i >= NVT_NUM_TR
234 && (sc->sc_tctrl2 & (1 << (2 * (i - NVT_NUM_TR)))) == 0) {
235 s[i].flags |= SENSOR_FINVALID;
236 s[i].value = 0;
237 continue;
238 }
239
240 data = nvt_readreg(sc, NVT_TR5 + i);
241 vrlsb = nvt_readreg(sc, NVT_VRLSB);
242 if (data == -128 && (vrlsb >> 6) == 0) {
243 s[i].flags |= SENSOR_FINVALID;
244 s[i].value = 0;
245 continue;
246 }
247 s[i].value = data * 1000000 + (vrlsb >> 6) * 250000;
248 s[i].value += 273150000;
249 s[i].flags &= ~SENSOR_FINVALID;
250 }
251 }
252
253 void
nvt_refresh_fans(struct nvt_softc * sc)254 nvt_refresh_fans(struct nvt_softc *sc)
255 {
256 struct ksensor *s = &sc->sc_sensors[NVT_NUM_VOLTS + NVT_NUM_TEMPS];
257 uint8_t data, vrlsb;
258 uint16_t count;
259 int i;
260
261 for (i = 0; i < NVT_NUM_FANS; i++) {
262 if ((sc->sc_fctrl & (1 << i)) == 0) {
263 s[i].flags |= SENSOR_FINVALID;
264 s[i].value = 0;
265 continue;
266 }
267
268 data = nvt_readreg(sc, NVT_FANIN1_COUNT + i);
269 vrlsb = nvt_readreg(sc, NVT_VRLSB);
270 count = (data << 4) + (vrlsb >> 4);
271 if (count == 0) {
272 s[i].flags |= SENSOR_FINVALID;
273 s[i].value = 0;
274 continue;
275 }
276 s[i].value = 1350000 / (count * 2);
277 s[i].flags &= ~SENSOR_FINVALID;
278 }
279 }
280
281 uint8_t
nvt_readreg(struct nvt_softc * sc,uint8_t reg)282 nvt_readreg(struct nvt_softc *sc, uint8_t reg)
283 {
284 uint8_t data;
285
286 iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
287 sc->sc_addr, ®, sizeof reg, &data, sizeof data, 0);
288
289 return data;
290 }
291
292 void
nvt_writereg(struct nvt_softc * sc,uint8_t reg,uint8_t data)293 nvt_writereg(struct nvt_softc *sc, uint8_t reg, uint8_t data)
294 {
295 iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
296 sc->sc_addr, ®, sizeof reg, &data, sizeof data, 0);
297 }
298