1/*	$OpenBSD: sdtemp.c,v 1.16 2022/04/06 18:59:28 naddy Exp $	*/
2
3/*
4 * Copyright (c) 2008 Theo de Raadt
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/* JEDEC JC-42.4 registers */
27#define JC_TEMP			0x05
28
29/* Sensors */
30#define JCTEMP_TEMP		0
31#define JCTEMP_NUM_SENSORS	1
32
33struct sdtemp_softc {
34	struct device	sc_dev;
35	i2c_tag_t	sc_tag;
36	i2c_addr_t	sc_addr;
37
38	struct ksensor	sc_sensor[JCTEMP_NUM_SENSORS];
39	struct ksensordev sc_sensordev;
40};
41
42int	sdtemp_match(struct device *, void *, void *);
43void	sdtemp_attach(struct device *, struct device *, void *);
44void	sdtemp_refresh(void *);
45
46const struct cfattach sdtemp_ca = {
47	sizeof(struct sdtemp_softc), sdtemp_match, sdtemp_attach
48};
49
50struct cfdriver sdtemp_cd = {
51	NULL, "sdtemp", DV_DULL
52};
53
54int
55sdtemp_match(struct device *parent, void *match, void *aux)
56{
57	struct i2c_attach_args *ia = aux;
58
59	if (strcmp(ia->ia_name, "se97") == 0 ||
60	    strcmp(ia->ia_name, "se98") == 0 ||
61	    strcmp(ia->ia_name, "max6604") == 0 ||
62	    strcmp(ia->ia_name, "mcp9804") == 0 ||
63	    strcmp(ia->ia_name, "mcp9805") == 0 ||
64	    strcmp(ia->ia_name, "mcp98242") == 0 ||
65	    strcmp(ia->ia_name, "mcp98243") == 0 ||
66	    strcmp(ia->ia_name, "mcp98244") == 0 ||
67	    strcmp(ia->ia_name, "adt7408") == 0 ||
68	    strcmp(ia->ia_name, "stts424e02") == 0 ||
69	    strcmp(ia->ia_name, "stts424") == 0 ||
70	    strcmp(ia->ia_name, "stts2002") == 0 ||
71	    strcmp(ia->ia_name, "stts2004") == 0 ||
72	    strcmp(ia->ia_name, "stts3000") == 0 ||
73	    strcmp(ia->ia_name, "ts3000b3") == 0 ||
74	    strcmp(ia->ia_name, "ts3000gb0") == 0 ||
75	    strcmp(ia->ia_name, "ts3000gb2") == 0 ||
76	    strcmp(ia->ia_name, "ts3001gb2") == 0 ||
77	    strcmp(ia->ia_name, "tse2004gb2") == 0 ||
78	    strcmp(ia->ia_name, "at30ts00") == 0 ||
79	    strcmp(ia->ia_name, "at30tse004") == 0 ||
80	    strcmp(ia->ia_name, "cat34ts02") == 0 ||
81	    strcmp(ia->ia_name, "cat34ts02c") == 0 ||
82	    strcmp(ia->ia_name, "cat34ts04") == 0 ||
83	    strcmp(ia->ia_name, "gt30ts00") == 0 ||
84	    strcmp(ia->ia_name, "gt34ts02") == 0)
85		return (1);
86	return (0);
87}
88
89void
90sdtemp_attach(struct device *parent, struct device *self, void *aux)
91{
92	struct sdtemp_softc *sc = (struct sdtemp_softc *)self;
93	struct i2c_attach_args *ia = aux;
94
95	sc->sc_tag = ia->ia_tag;
96	sc->sc_addr = ia->ia_addr;
97
98	printf(": %s", ia->ia_name);
99
100	/* Initialize sensor data. */
101	strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
102	    sizeof(sc->sc_sensordev.xname));
103
104	sc->sc_sensor[JCTEMP_TEMP].type = SENSOR_TEMP;
105
106	if (sensor_task_register(sc, sdtemp_refresh, 5) == NULL) {
107		printf(", unable to register update task\n");
108		return;
109	}
110
111	sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[0]);
112	sensordev_install(&sc->sc_sensordev);
113
114	printf("\n");
115}
116
117void
118sdtemp_refresh(void *arg)
119{
120	struct sdtemp_softc *sc = arg;
121	u_int8_t cmd;
122	int16_t data, sdata;
123
124	iic_acquire_bus(sc->sc_tag, 0);
125
126	cmd = JC_TEMP;
127	if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr,
128	    &cmd, sizeof cmd, &data, sizeof data, 0) == 0) {
129		sdata = betoh16(data) & 0x1fff;
130		if (sdata & 0x1000)
131			sdata -= 0x2000;
132		sc->sc_sensor[JCTEMP_TEMP].value =
133		    273150000 + 62500 * sdata;
134		sc->sc_sensor[JCTEMP_TEMP].flags &= ~SENSOR_FINVALID;
135#if 0
136		printf("sdtemp %04x %04x %d\n", data & 0xffff,
137		    (u_int)sdata & 0xffff,
138		    sc->sc_sensor[JCTEMP_TEMP].value);
139#endif
140	}
141
142	iic_release_bus(sc->sc_tag, 0);
143}
144