1 /* $OpenBSD: hitemp.c,v 1.3 2022/06/28 23:43:12 naddy Exp $ */
2 /*
3 * Copyright (c) 2018 Mark Kettenis <kettenis@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <sys/param.h>
19 #include <sys/systm.h>
20 #include <sys/device.h>
21 #include <sys/sensors.h>
22
23 #include <machine/bus.h>
24 #include <machine/fdt.h>
25
26 #include <dev/ofw/openfirm.h>
27 #include <dev/ofw/fdt.h>
28
29 /* Registers */
30 #define HI3660_OFFSET 0x040
31 #define HI3660_TEMP 0x01c
32 #define HI3660_TH 0x020
33 #define HI3660_LAG 0x028
34 #define HI3660_INT_EN 0x02c
35 #define HI3660_INT_CLR 0x030
36
37 #define HI3670_OFFSET 0x100
38 #define HI3670_INT_EN 0x064
39
40 #define HITEMP_NSENSORS 4
41
42 struct hitemp_softc {
43 struct device sc_dev;
44 bus_space_tag_t sc_iot;
45 bus_space_handle_t sc_ioh;
46
47 bus_size_t sc_offset;
48 uint64_t (*sc_calc_temp)(uint64_t);
49
50 struct ksensor sc_sensors[HITEMP_NSENSORS];
51 struct ksensordev sc_sensordev;
52 };
53
54 int hitemp_match(struct device *, void *, void *);
55 void hitemp_attach(struct device *, struct device *, void *);
56
57 const struct cfattach hitemp_ca = {
58 sizeof (struct hitemp_softc), hitemp_match, hitemp_attach
59 };
60
61 struct cfdriver hitemp_cd = {
62 NULL, "hitemp", DV_DULL
63 };
64
65 struct hitemp_compat {
66 const char *compat;
67 bus_size_t offset;
68 uint64_t (*calc_temp)(uint64_t);
69 };
70
71 uint64_t hi3660_calc_temp(uint64_t);
72 uint64_t hi3670_calc_temp(uint64_t);
73
74 const struct hitemp_compat hitemp_compat[] = {
75 {
76 "hsilicon,hi3660-tsensor",
77 HI3660_OFFSET, hi3660_calc_temp
78 },
79 {
80 "hisilicon,kirin970-tsensor",
81 HI3670_OFFSET, hi3670_calc_temp
82 }
83 };
84
85 void hitemp_refresh_sensors(void *);
86
87 int
hitemp_match(struct device * parent,void * match,void * aux)88 hitemp_match(struct device *parent, void *match, void *aux)
89 {
90 struct fdt_attach_args *faa = aux;
91 int i;
92
93 for (i = 0; i < nitems(hitemp_compat); i++) {
94 if (OF_is_compatible(faa->fa_node, hitemp_compat[i].compat))
95 return 1;
96 }
97
98 return 0;
99 }
100
101 void
hitemp_attach(struct device * parent,struct device * self,void * aux)102 hitemp_attach(struct device *parent, struct device *self, void *aux)
103 {
104 struct hitemp_softc *sc = (struct hitemp_softc *)self;
105 struct fdt_attach_args *faa = aux;
106 int i;
107
108 if (faa->fa_nreg < 1) {
109 printf(": no registers\n");
110 return;
111 }
112
113 sc->sc_iot = faa->fa_iot;
114 if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
115 faa->fa_reg[0].size, 0, &sc->sc_ioh)) {
116 printf(": can't map registers\n");
117 return;
118 }
119
120 printf("\n");
121
122 for (i = 0; i < nitems(hitemp_compat); i++) {
123 if (OF_is_compatible(faa->fa_node, hitemp_compat[i].compat)) {
124 break;
125 }
126 }
127 KASSERT(i < nitems(hitemp_compat));
128
129 sc->sc_offset = hitemp_compat[i].offset;
130 sc->sc_calc_temp = hitemp_compat[i].calc_temp;
131
132 /* Register sensors. */
133 strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
134 sizeof(sc->sc_sensordev.xname));
135 for (i = 0; i < HITEMP_NSENSORS; i++) {
136 sc->sc_sensors[i].type = SENSOR_TEMP;
137 sc->sc_sensors[i].flags = SENSOR_FINVALID;
138 sensor_attach(&sc->sc_sensordev, &sc->sc_sensors[i]);
139 }
140 sensordev_install(&sc->sc_sensordev);
141 sensor_task_register(sc, hitemp_refresh_sensors, 5);
142 }
143
144 uint64_t
hi3660_calc_temp(uint64_t value)145 hi3660_calc_temp(uint64_t value)
146 {
147 return 273150000 - 63780000 + value * 205000;
148 }
149
150 uint64_t
hi3670_calc_temp(uint64_t value)151 hi3670_calc_temp(uint64_t value)
152 {
153 return 273150000 - 73720000 + value * 216000;
154 }
155
156 void
hitemp_refresh_sensors(void * arg)157 hitemp_refresh_sensors(void *arg)
158 {
159 struct hitemp_softc *sc = arg;
160 bus_size_t offset = 0;
161 uint32_t value;
162 uint64_t temp;
163 int i;
164
165 for (i = 0; i < HITEMP_NSENSORS; i++) {
166 value = bus_space_read_4(sc->sc_iot, sc->sc_ioh,
167 offset + HI3660_TEMP);
168 temp = sc->sc_calc_temp(value);
169 sc->sc_sensors[i].value = temp;
170 sc->sc_sensors[i].flags &= ~SENSOR_FINVALID;
171 offset += sc->sc_offset;
172 }
173 }
174