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
42struct 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
54int	hitemp_match(struct device *, void *, void *);
55void	hitemp_attach(struct device *, struct device *, void *);
56
57const struct cfattach	hitemp_ca = {
58	sizeof (struct hitemp_softc), hitemp_match, hitemp_attach
59};
60
61struct cfdriver hitemp_cd = {
62	NULL, "hitemp", DV_DULL
63};
64
65struct hitemp_compat {
66	const char *compat;
67	bus_size_t offset;
68	uint64_t (*calc_temp)(uint64_t);
69};
70
71uint64_t hi3660_calc_temp(uint64_t);
72uint64_t hi3670_calc_temp(uint64_t);
73
74const 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
85void	hitemp_refresh_sensors(void *);
86
87int
88hitemp_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
101void
102hitemp_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
144uint64_t
145hi3660_calc_temp(uint64_t value)
146{
147	return 273150000 - 63780000 + value * 205000;
148}
149
150uint64_t
151hi3670_calc_temp(uint64_t value)
152{
153	return 273150000 - 73720000 + value * 216000;
154}
155
156void
157hitemp_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