titemp.c revision 1.1.2.2
1 1.1.2.2 skrll /* $NetBSD: titemp.c,v 1.1.2.2 2015/06/06 14:40:07 skrll Exp $ */ 2 1.1.2.2 skrll 3 1.1.2.2 skrll /*- 4 1.1.2.2 skrll * Copyright (c) 2015 Jared D. McNeill <jmcneill (at) invisible.ca> 5 1.1.2.2 skrll * All rights reserved. 6 1.1.2.2 skrll * 7 1.1.2.2 skrll * Redistribution and use in source and binary forms, with or without 8 1.1.2.2 skrll * modification, are permitted provided that the following conditions 9 1.1.2.2 skrll * are met: 10 1.1.2.2 skrll * 1. Redistributions of source code must retain the above copyright 11 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer. 12 1.1.2.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer in the 14 1.1.2.2 skrll * documentation and/or other materials provided with the distribution. 15 1.1.2.2 skrll * 16 1.1.2.2 skrll * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 1.1.2.2 skrll * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 1.1.2.2 skrll * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 1.1.2.2 skrll * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 1.1.2.2 skrll * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 1.1.2.2 skrll * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 1.1.2.2 skrll * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 1.1.2.2 skrll * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 1.1.2.2 skrll * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 1.1.2.2 skrll * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 1.1.2.2 skrll * POSSIBILITY OF SUCH DAMAGE. 27 1.1.2.2 skrll */ 28 1.1.2.2 skrll 29 1.1.2.2 skrll #include <sys/cdefs.h> 30 1.1.2.2 skrll __KERNEL_RCSID(0, "$NetBSD: titemp.c,v 1.1.2.2 2015/06/06 14:40:07 skrll Exp $"); 31 1.1.2.2 skrll 32 1.1.2.2 skrll #include <sys/param.h> 33 1.1.2.2 skrll #include <sys/systm.h> 34 1.1.2.2 skrll #include <sys/device.h> 35 1.1.2.2 skrll #include <sys/conf.h> 36 1.1.2.2 skrll #include <sys/bus.h> 37 1.1.2.2 skrll #include <sys/kmem.h> 38 1.1.2.2 skrll 39 1.1.2.2 skrll #include <dev/i2c/i2cvar.h> 40 1.1.2.2 skrll 41 1.1.2.2 skrll #include <dev/sysmon/sysmonvar.h> 42 1.1.2.2 skrll 43 1.1.2.2 skrll #define TITEMP_LTEMP_HI_REG 0x00 44 1.1.2.2 skrll #define TITEMP_RTEMP_HI_REG 0x01 45 1.1.2.2 skrll #define TITEMP_STATUS_REG 0x02 46 1.1.2.2 skrll #define TITEMP_CONFIG_REG 0x03 47 1.1.2.2 skrll #define TITEMP_CONVRATE_REG 0x04 48 1.1.2.2 skrll #define TITEMP_LTEMP_HLIMIT_HI_REG 0x05 49 1.1.2.2 skrll #define TITEMP_LTEMP_LLIMIT_HI_REG 0x06 50 1.1.2.2 skrll #define TITEMP_RTEMP_HLIMIT_HI_REG 0x07 51 1.1.2.2 skrll #define TITEMP_RTEMP_LLIMIT_HI_REG 0x08 52 1.1.2.2 skrll #define TITEMP_RTEMP_LO_REG 0x10 53 1.1.2.2 skrll #define TITEMP_RTEMP_OFF_HI_REG 0x11 54 1.1.2.2 skrll #define TITEMP_RTEMP_OFF_LO_REG 0x12 55 1.1.2.2 skrll #define TITEMP_RTEMP_HLIMIT_LO_REG 0x13 56 1.1.2.2 skrll #define TITEMP_RTEMP_LLIMIT_LO_REG 0x14 57 1.1.2.2 skrll #define TITEMP_LTEMP_LO_REG 0x15 58 1.1.2.2 skrll #define TITEMP_RTEMP_THERM_LIMIT_REG 0x19 59 1.1.2.2 skrll #define TITEMP_LTEMP_THERM_LIMIT_REG 0x20 60 1.1.2.2 skrll #define TITEMP_THERM_HYST_REG 0x21 61 1.1.2.2 skrll #define TITEMP_CONAL_REG 0x22 62 1.1.2.2 skrll #define TITEMP_NC_REG 0x23 63 1.1.2.2 skrll #define TITEMP_DF_REG 0x24 64 1.1.2.2 skrll #define TITEMP_MFID_REG 0xfe 65 1.1.2.2 skrll 66 1.1.2.2 skrll #define TITEMP_MFID_TMP451 0x55 67 1.1.2.2 skrll 68 1.1.2.2 skrll struct titemp_softc { 69 1.1.2.2 skrll device_t sc_dev; 70 1.1.2.2 skrll i2c_tag_t sc_i2c; 71 1.1.2.2 skrll i2c_addr_t sc_addr; 72 1.1.2.2 skrll 73 1.1.2.2 skrll struct sysmon_envsys *sc_sme; 74 1.1.2.2 skrll envsys_data_t sc_sensor_ltemp; 75 1.1.2.2 skrll envsys_data_t sc_sensor_rtemp; 76 1.1.2.2 skrll }; 77 1.1.2.2 skrll 78 1.1.2.2 skrll static int titemp_match(device_t, cfdata_t, void *); 79 1.1.2.2 skrll static void titemp_attach(device_t, device_t, void *); 80 1.1.2.2 skrll 81 1.1.2.2 skrll static void titemp_sensors_refresh(struct sysmon_envsys *, envsys_data_t *); 82 1.1.2.2 skrll static int titemp_read(struct titemp_softc *, uint8_t, uint8_t *); 83 1.1.2.2 skrll 84 1.1.2.2 skrll CFATTACH_DECL_NEW(titemp, sizeof(struct titemp_softc), 85 1.1.2.2 skrll titemp_match, titemp_attach, NULL, NULL); 86 1.1.2.2 skrll 87 1.1.2.2 skrll static int 88 1.1.2.2 skrll titemp_match(device_t parent, cfdata_t match, void *aux) 89 1.1.2.2 skrll { 90 1.1.2.2 skrll struct i2c_attach_args *ia = aux; 91 1.1.2.2 skrll uint8_t mfid; 92 1.1.2.2 skrll int error; 93 1.1.2.2 skrll 94 1.1.2.2 skrll if (iic_acquire_bus(ia->ia_tag, I2C_F_POLL) != 0) 95 1.1.2.2 skrll return 0; 96 1.1.2.2 skrll error = iic_smbus_read_byte(ia->ia_tag, ia->ia_addr, 97 1.1.2.2 skrll TITEMP_MFID_REG, &mfid, I2C_F_POLL); 98 1.1.2.2 skrll iic_release_bus(ia->ia_tag, I2C_F_POLL); 99 1.1.2.2 skrll 100 1.1.2.2 skrll if (error || mfid != TITEMP_MFID_TMP451) 101 1.1.2.2 skrll return 0; 102 1.1.2.2 skrll 103 1.1.2.2 skrll return 1; 104 1.1.2.2 skrll } 105 1.1.2.2 skrll 106 1.1.2.2 skrll static void 107 1.1.2.2 skrll titemp_attach(device_t parent, device_t self, void *aux) 108 1.1.2.2 skrll { 109 1.1.2.2 skrll struct titemp_softc *sc = device_private(self); 110 1.1.2.2 skrll struct i2c_attach_args *ia = aux; 111 1.1.2.2 skrll 112 1.1.2.2 skrll sc->sc_dev = self; 113 1.1.2.2 skrll sc->sc_i2c = ia->ia_tag; 114 1.1.2.2 skrll sc->sc_addr = ia->ia_addr; 115 1.1.2.2 skrll 116 1.1.2.2 skrll aprint_naive("\n"); 117 1.1.2.2 skrll aprint_normal(": TMP451\n"); 118 1.1.2.2 skrll 119 1.1.2.2 skrll sc->sc_sme = sysmon_envsys_create(); 120 1.1.2.2 skrll sc->sc_sme->sme_name = device_xname(self); 121 1.1.2.2 skrll sc->sc_sme->sme_cookie = sc; 122 1.1.2.2 skrll sc->sc_sme->sme_refresh = titemp_sensors_refresh; 123 1.1.2.2 skrll 124 1.1.2.2 skrll sc->sc_sensor_ltemp.units = ENVSYS_STEMP; 125 1.1.2.2 skrll sc->sc_sensor_ltemp.state = ENVSYS_SINVALID; 126 1.1.2.2 skrll snprintf(sc->sc_sensor_ltemp.desc, sizeof(sc->sc_sensor_ltemp.desc), 127 1.1.2.2 skrll "local temperature"); 128 1.1.2.2 skrll sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor_ltemp); 129 1.1.2.2 skrll 130 1.1.2.2 skrll sc->sc_sensor_rtemp.units = ENVSYS_STEMP; 131 1.1.2.2 skrll sc->sc_sensor_rtemp.state = ENVSYS_SINVALID; 132 1.1.2.2 skrll snprintf(sc->sc_sensor_rtemp.desc, sizeof(sc->sc_sensor_rtemp.desc), 133 1.1.2.2 skrll "remote temperature"); 134 1.1.2.2 skrll sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor_rtemp); 135 1.1.2.2 skrll 136 1.1.2.2 skrll sysmon_envsys_register(sc->sc_sme); 137 1.1.2.2 skrll } 138 1.1.2.2 skrll 139 1.1.2.2 skrll static void 140 1.1.2.2 skrll titemp_sensors_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 141 1.1.2.2 skrll { 142 1.1.2.2 skrll struct titemp_softc *sc = sme->sme_cookie; 143 1.1.2.2 skrll uint8_t reg_hi, reg_lo, temp[2]; 144 1.1.2.2 skrll int error; 145 1.1.2.2 skrll 146 1.1.2.2 skrll if (edata == &sc->sc_sensor_ltemp) { 147 1.1.2.2 skrll reg_hi = TITEMP_LTEMP_HI_REG; 148 1.1.2.2 skrll reg_lo = TITEMP_LTEMP_LO_REG; 149 1.1.2.2 skrll } else if (edata == &sc->sc_sensor_rtemp) { 150 1.1.2.2 skrll reg_hi = TITEMP_RTEMP_HI_REG; 151 1.1.2.2 skrll reg_lo = TITEMP_RTEMP_LO_REG; 152 1.1.2.2 skrll } else { 153 1.1.2.2 skrll edata->state = ENVSYS_SINVALID; 154 1.1.2.2 skrll return; 155 1.1.2.2 skrll } 156 1.1.2.2 skrll 157 1.1.2.2 skrll iic_acquire_bus(sc->sc_i2c, 0); 158 1.1.2.2 skrll if ((error = titemp_read(sc, reg_hi, &temp[0])) != 0) 159 1.1.2.2 skrll goto done; 160 1.1.2.2 skrll if ((error = titemp_read(sc, reg_lo, &temp[1])) != 0) 161 1.1.2.2 skrll goto done; 162 1.1.2.2 skrll done: 163 1.1.2.2 skrll iic_release_bus(sc->sc_i2c, 0); 164 1.1.2.2 skrll 165 1.1.2.2 skrll if (error) { 166 1.1.2.2 skrll edata->state = ENVSYS_SINVALID; 167 1.1.2.2 skrll } else { 168 1.1.2.2 skrll edata->value_cur = 169 1.1.2.2 skrll ((uint64_t)temp[0] * 1000000) + 170 1.1.2.2 skrll ((uint64_t)temp[1] * 62500) + 171 1.1.2.2 skrll + 273150000; 172 1.1.2.2 skrll edata->state = ENVSYS_SVALID; 173 1.1.2.2 skrll } 174 1.1.2.2 skrll } 175 1.1.2.2 skrll 176 1.1.2.2 skrll static int 177 1.1.2.2 skrll titemp_read(struct titemp_softc *sc, uint8_t reg, uint8_t *val) 178 1.1.2.2 skrll { 179 1.1.2.2 skrll return iic_smbus_read_byte(sc->sc_i2c, sc->sc_addr, reg, val, 0); 180 1.1.2.2 skrll } 181
Indexes created Sun Oct 12 20:09:57 GMT 2025