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 33 struct 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 42 int sdtemp_match(struct device *, void *, void *); 43 void sdtemp_attach(struct device *, struct device *, void *); 44 void sdtemp_refresh(void *); 45 46 const struct cfattach sdtemp_ca = { 47 sizeof(struct sdtemp_softc), sdtemp_match, sdtemp_attach 48 }; 49 50 struct cfdriver sdtemp_cd = { 51 NULL, "sdtemp", DV_DULL 52 }; 53 54 int 55 sdtemp_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 89 void 90 sdtemp_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 } 116 117 void 118 sdtemp_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