hytp14.c revision 1.2.2.2
1 1.2.2.2 tls /*- 2 1.2.2.2 tls * Copyright (c) 2014 The NetBSD Foundation, Inc. 3 1.2.2.2 tls * All rights reserved. 4 1.2.2.2 tls * 5 1.2.2.2 tls * This code is derived from software contributed to The NetBSD Foundation 6 1.2.2.2 tls * by Frank Kardel. 7 1.2.2.2 tls * 8 1.2.2.2 tls * Redistribution and use in source and binary forms, with or without 9 1.2.2.2 tls * modification, are permitted provided that the following conditions 10 1.2.2.2 tls * are met: 11 1.2.2.2 tls * 1. Redistributions of source code must retain the above copyright 12 1.2.2.2 tls * notice, this list of conditions and the following disclaimer. 13 1.2.2.2 tls * 2. Redistributions in binary form must reproduce the above copyright 14 1.2.2.2 tls * notice, this list of conditions and the following disclaimer in the 15 1.2.2.2 tls * documentation and/or other materials provided with the distribution. 16 1.2.2.2 tls * 17 1.2.2.2 tls * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 1.2.2.2 tls * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 1.2.2.2 tls * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 1.2.2.2 tls * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 1.2.2.2 tls * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 1.2.2.2 tls * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 1.2.2.2 tls * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 1.2.2.2 tls * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 1.2.2.2 tls * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 1.2.2.2 tls * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 1.2.2.2 tls * POSSIBILITY OF SUCH DAMAGE. 28 1.2.2.2 tls */ 29 1.2.2.2 tls 30 1.2.2.2 tls /* 31 1.2.2.2 tls * IST-AG P14 calibrated Hygro-/Temperature sensor module 32 1.2.2.2 tls * Devices: HYT-271, HYT-221 and HYT-939 33 1.2.2.2 tls * 34 1.2.2.2 tls * see: 35 1.2.2.2 tls * http://www.ist-ag.com/eh/ist-ag/resource.nsf/imgref/Download_AHHYTM_E2.1.pdf/ 36 1.2.2.2 tls * $FILE/AHHYTM_E2.1.pdf 37 1.2.2.2 tls */ 38 1.2.2.2 tls 39 1.2.2.2 tls #include <sys/cdefs.h> 40 1.2.2.2 tls __KERNEL_RCSID(0, "$NetBSD: hytp14.c,v 1.2.2.2 2014/08/10 06:54:51 tls Exp $"); 41 1.2.2.2 tls 42 1.2.2.2 tls #include <sys/param.h> 43 1.2.2.2 tls #include <sys/systm.h> 44 1.2.2.2 tls #include <sys/kernel.h> 45 1.2.2.2 tls #include <sys/device.h> 46 1.2.2.2 tls #include <sys/module.h> 47 1.2.2.2 tls 48 1.2.2.2 tls #include <dev/sysmon/sysmonvar.h> 49 1.2.2.2 tls 50 1.2.2.2 tls #include <dev/i2c/i2cvar.h> 51 1.2.2.2 tls #include <dev/i2c/hytp14reg.h> 52 1.2.2.2 tls #include <dev/i2c/hytp14var.h> 53 1.2.2.2 tls 54 1.2.2.2 tls static int hytp14_match(device_t, cfdata_t, void *); 55 1.2.2.2 tls static void hytp14_attach(device_t, device_t, void *); 56 1.2.2.2 tls static int hytp14_detach(device_t, int); 57 1.2.2.2 tls static int hytp14_refresh_sensor(struct hytp14_sc *sc); 58 1.2.2.2 tls static void hytp14_refresh(struct sysmon_envsys *, envsys_data_t *); 59 1.2.2.2 tls static void hytp14_refresh_humidity(struct hytp14_sc *, envsys_data_t *); 60 1.2.2.2 tls static void hytp14_refresh_temp(struct hytp14_sc *, envsys_data_t *); 61 1.2.2.2 tls 62 1.2.2.2 tls /* #define HYT_DEBUG 3 */ 63 1.2.2.2 tls #ifdef HYT_DEBUG 64 1.2.2.2 tls volatile int hythygtemp_debug = HYT_DEBUG; 65 1.2.2.2 tls 66 1.2.2.2 tls #define DPRINTF(_L_, _X_) do { \ 67 1.2.2.2 tls if ((_L_) <= hythygtemp_debug) { \ 68 1.2.2.2 tls printf _X_; \ 69 1.2.2.2 tls } \ 70 1.2.2.2 tls } while (0) 71 1.2.2.2 tls #else 72 1.2.2.2 tls #define DPRINTF(_L_, _X_) 73 1.2.2.2 tls #endif 74 1.2.2.2 tls 75 1.2.2.2 tls CFATTACH_DECL_NEW(hythygtemp, sizeof(struct hytp14_sc), 76 1.2.2.2 tls hytp14_match, hytp14_attach, hytp14_detach, NULL); 77 1.2.2.2 tls 78 1.2.2.2 tls static struct hytp14_sensor hytp14_sensors[] = { 79 1.2.2.2 tls { 80 1.2.2.2 tls .desc = "humidity", 81 1.2.2.2 tls .type = ENVSYS_SRELHUMIDITY, 82 1.2.2.2 tls .refresh = hytp14_refresh_humidity 83 1.2.2.2 tls }, 84 1.2.2.2 tls { 85 1.2.2.2 tls .desc = "temperature", 86 1.2.2.2 tls .type = ENVSYS_STEMP, 87 1.2.2.2 tls .refresh = hytp14_refresh_temp 88 1.2.2.2 tls } 89 1.2.2.2 tls }; 90 1.2.2.2 tls 91 1.2.2.2 tls static int 92 1.2.2.2 tls hytp14_match(device_t parent, cfdata_t match, void *aux) 93 1.2.2.2 tls { 94 1.2.2.2 tls struct i2c_attach_args *ia = aux; 95 1.2.2.2 tls 96 1.2.2.2 tls if (ia->ia_name) { 97 1.2.2.2 tls /* direct config - check name */ 98 1.2.2.2 tls if (strcmp(ia->ia_name, "hythygtemp") == 0) 99 1.2.2.2 tls return 1; 100 1.2.2.2 tls } else { 101 1.2.2.2 tls /* indirect config - check for configured address */ 102 1.2.2.2 tls if ((ia->ia_addr > 0) && (ia->ia_addr <= 0x7F)) 103 1.2.2.2 tls return 1; 104 1.2.2.2 tls } 105 1.2.2.2 tls return 0; 106 1.2.2.2 tls } 107 1.2.2.2 tls 108 1.2.2.2 tls static void 109 1.2.2.2 tls hytp14_attach(device_t parent, device_t self, void *aux) 110 1.2.2.2 tls { 111 1.2.2.2 tls struct hytp14_sc *sc = device_private(self); 112 1.2.2.2 tls struct i2c_attach_args *ia = aux; 113 1.2.2.2 tls int i; 114 1.2.2.2 tls 115 1.2.2.2 tls sc->sc_dev = self; 116 1.2.2.2 tls sc->sc_tag = ia->ia_tag; 117 1.2.2.2 tls sc->sc_addr = ia->ia_addr; 118 1.2.2.2 tls sc->sc_refresh = 0; 119 1.2.2.2 tls sc->sc_valid = ENVSYS_SINVALID; 120 1.2.2.2 tls sc->sc_numsensors = __arraycount(hytp14_sensors); 121 1.2.2.2 tls 122 1.2.2.2 tls if ((sc->sc_sme = sysmon_envsys_create()) == NULL) { 123 1.2.2.2 tls aprint_error_dev(sc->sc_dev, 124 1.2.2.2 tls "unable to create sysmon structure\n"); 125 1.2.2.2 tls return; 126 1.2.2.2 tls } 127 1.2.2.2 tls 128 1.2.2.2 tls for (i = 0; i < sc->sc_numsensors; i++) { 129 1.2.2.2 tls strlcpy(sc->sc_sensors[i].desc, 130 1.2.2.2 tls hytp14_sensors[i].desc, 131 1.2.2.2 tls sizeof sc->sc_sensors[i].desc); 132 1.2.2.2 tls 133 1.2.2.2 tls sc->sc_sensors[i].units = hytp14_sensors[i].type; 134 1.2.2.2 tls sc->sc_sensors[i].state = ENVSYS_SINVALID; 135 1.2.2.2 tls 136 1.2.2.2 tls DPRINTF(2, ("hytp14_attach: registering sensor %d (%s)\n", i, 137 1.2.2.2 tls sc->sc_sensors[i].desc)); 138 1.2.2.2 tls 139 1.2.2.2 tls if (sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensors[i])) { 140 1.2.2.2 tls aprint_error_dev(sc->sc_dev, 141 1.2.2.2 tls "unable to attach sensor\n"); 142 1.2.2.2 tls sysmon_envsys_destroy(sc->sc_sme); 143 1.2.2.2 tls return; 144 1.2.2.2 tls } 145 1.2.2.2 tls } 146 1.2.2.2 tls 147 1.2.2.2 tls sc->sc_sme->sme_name = device_xname(sc->sc_dev); 148 1.2.2.2 tls sc->sc_sme->sme_cookie = sc; 149 1.2.2.2 tls sc->sc_sme->sme_refresh = hytp14_refresh; 150 1.2.2.2 tls 151 1.2.2.2 tls DPRINTF(2, ("hytp14_attach: registering with envsys\n")); 152 1.2.2.2 tls 153 1.2.2.2 tls if (sysmon_envsys_register(sc->sc_sme)) { 154 1.2.2.2 tls aprint_error_dev(sc->sc_dev, 155 1.2.2.2 tls "unable to register with sysmon\n"); 156 1.2.2.2 tls sysmon_envsys_destroy(sc->sc_sme); 157 1.2.2.2 tls return; 158 1.2.2.2 tls } 159 1.2.2.2 tls 160 1.2.2.2 tls aprint_normal(": HYT-221/271/939 humidity and temperature sensor\n"); 161 1.2.2.2 tls } 162 1.2.2.2 tls 163 1.2.2.2 tls static int hytp14_detach(device_t self, int flags) 164 1.2.2.2 tls { 165 1.2.2.2 tls struct hytp14_sc *sc = device_private(self); 166 1.2.2.2 tls 167 1.2.2.2 tls if (sc->sc_sme != NULL) { 168 1.2.2.2 tls sysmon_envsys_unregister(sc->sc_sme); 169 1.2.2.2 tls sc->sc_sme = NULL; 170 1.2.2.2 tls } 171 1.2.2.2 tls 172 1.2.2.2 tls return 0; 173 1.2.2.2 tls } 174 1.2.2.2 tls 175 1.2.2.2 tls static int 176 1.2.2.2 tls hytp14_refresh_sensor(struct hytp14_sc *sc) 177 1.2.2.2 tls { 178 1.2.2.2 tls int error = 0; 179 1.2.2.2 tls uint8_t buf[I2C_EXEC_MAX_BUFLEN]; 180 1.2.2.2 tls 181 1.2.2.2 tls /* no more than once per second */ 182 1.2.2.2 tls if (hardclock_ticks - sc->sc_refresh < hz) 183 1.2.2.2 tls return sc->sc_valid; 184 1.2.2.2 tls 185 1.2.2.2 tls DPRINTF(2, ("hytp14_refresh_sensor(%s)\n", device_xname(sc->sc_dev))); 186 1.2.2.2 tls 187 1.2.2.2 tls if ((error = iic_acquire_bus(sc->sc_tag, 0)) == 0) { 188 1.2.2.2 tls DPRINTF(3, ("hytp14_refresh_sensor(%s): bus locked\n", device_xname(sc->sc_dev))); 189 1.2.2.2 tls 190 1.2.2.2 tls /* send MR command */ 191 1.2.2.2 tls /* avoid quick read/write by providing a result buffer */ 192 1.2.2.2 tls error = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, 193 1.2.2.2 tls sc->sc_addr, NULL, 0, buf, sizeof buf, 0); 194 1.2.2.2 tls if (error == 0) { 195 1.2.2.2 tls DPRINTF(3, ("hytp14_refresh_sensor(%s): MR sent\n", 196 1.2.2.2 tls device_xname(sc->sc_dev))); 197 1.2.2.2 tls 198 1.2.2.2 tls /* send DF command - read data from sensor */ 199 1.2.2.2 tls error = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 200 1.2.2.2 tls sc->sc_addr, NULL, 0, sc->sc_data, 201 1.2.2.2 tls sizeof sc->sc_data, 0); 202 1.2.2.2 tls if (error != 0) { 203 1.2.2.2 tls DPRINTF(2, ("%s: %s: failed read from 0x%02x - error %d\n", 204 1.2.2.2 tls device_xname(sc->sc_dev), 205 1.2.2.2 tls __func__, sc->sc_addr, error)); 206 1.2.2.2 tls } else { 207 1.2.2.2 tls DPRINTF(2, ("hytp14_refresh_sensor(%s): DF success : 0x%02x%02x%02x%02x\n", 208 1.2.2.2 tls device_xname(sc->sc_dev), 209 1.2.2.2 tls sc->sc_data[0], 210 1.2.2.2 tls sc->sc_data[1], 211 1.2.2.2 tls sc->sc_data[2], 212 1.2.2.2 tls sc->sc_data[3])); 213 1.2.2.2 tls } 214 1.2.2.2 tls } else { 215 1.2.2.2 tls DPRINTF(2, ("%s: %s: failed read from 0x%02x - error %d\n", 216 1.2.2.2 tls device_xname(sc->sc_dev), __func__, 217 1.2.2.2 tls sc->sc_addr, error)); 218 1.2.2.2 tls } 219 1.2.2.2 tls 220 1.2.2.2 tls iic_release_bus(sc->sc_tag, 0); 221 1.2.2.2 tls DPRINTF(3, ("hytp14_refresh_sensor(%s): bus released\n", device_xname(sc->sc_dev))); 222 1.2.2.2 tls } else { 223 1.2.2.2 tls DPRINTF(2, ("%s: %s: failed read from 0x%02x - error %d\n", 224 1.2.2.2 tls device_xname(sc->sc_dev), __func__, sc->sc_addr, error)); 225 1.2.2.2 tls } 226 1.2.2.2 tls 227 1.2.2.2 tls sc->sc_refresh = hardclock_ticks; 228 1.2.2.2 tls 229 1.2.2.2 tls /* skip data if sensor is in command mode */ 230 1.2.2.2 tls if (error == 0 && (sc->sc_data[0] & HYTP14_RESP_CMDMODE) == 0) { 231 1.2.2.2 tls sc->sc_valid = ENVSYS_SVALID; 232 1.2.2.2 tls } else { 233 1.2.2.2 tls sc->sc_valid = ENVSYS_SINVALID; 234 1.2.2.2 tls } 235 1.2.2.2 tls 236 1.2.2.2 tls return sc->sc_valid; 237 1.2.2.2 tls } 238 1.2.2.2 tls 239 1.2.2.2 tls 240 1.2.2.2 tls static void 241 1.2.2.2 tls hytp14_refresh_humidity(struct hytp14_sc *sc, envsys_data_t *edata) 242 1.2.2.2 tls { 243 1.2.2.2 tls uint16_t hyg; 244 1.2.2.2 tls int status; 245 1.2.2.2 tls 246 1.2.2.2 tls status = hytp14_refresh_sensor(sc); 247 1.2.2.2 tls 248 1.2.2.2 tls if (status == ENVSYS_SVALID) { 249 1.2.2.2 tls hyg = (sc->sc_data[0] << 8) | sc->sc_data[1]; 250 1.2.2.2 tls 251 1.2.2.2 tls edata->value_cur = (1000000000 / HYTP14_HYG_SCALE) * (int32_t)HYTP14_HYG_RAWVAL(hyg); 252 1.2.2.2 tls edata->value_cur /= 10; 253 1.2.2.2 tls } 254 1.2.2.2 tls 255 1.2.2.2 tls edata->state = status; 256 1.2.2.2 tls } 257 1.2.2.2 tls 258 1.2.2.2 tls static void 259 1.2.2.2 tls hytp14_refresh_temp(struct hytp14_sc *sc, envsys_data_t *edata) 260 1.2.2.2 tls { 261 1.2.2.2 tls uint16_t temp; 262 1.2.2.2 tls int status; 263 1.2.2.2 tls 264 1.2.2.2 tls status = hytp14_refresh_sensor(sc); 265 1.2.2.2 tls 266 1.2.2.2 tls if (status == ENVSYS_SVALID) { 267 1.2.2.2 tls temp = HYTP14_TEMP_RAWVAL((sc->sc_data[2] << 8) | sc->sc_data[3]); 268 1.2.2.2 tls 269 1.2.2.2 tls edata->value_cur = (HYTP14_TEMP_FACTOR * 1000000) / HYTP14_TEMP_SCALE; 270 1.2.2.2 tls edata->value_cur *= (int32_t)temp; 271 1.2.2.2 tls edata->value_cur += HYTP14_TEMP_OFFSET * 1000000 + 273150000; 272 1.2.2.2 tls } 273 1.2.2.2 tls 274 1.2.2.2 tls edata->state = status; 275 1.2.2.2 tls } 276 1.2.2.2 tls 277 1.2.2.2 tls static void 278 1.2.2.2 tls hytp14_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 279 1.2.2.2 tls { 280 1.2.2.2 tls struct hytp14_sc *sc = sme->sme_cookie; 281 1.2.2.2 tls 282 1.2.2.2 tls hytp14_sensors[edata->sensor].refresh(sc, edata); 283 1.2.2.2 tls } 284 1.2.2.2 tls 285 1.2.2.2 tls 286 1.2.2.2 tls MODULE(MODULE_CLASS_DRIVER, hythygtemp, "iic"); 287 1.2.2.2 tls 288 1.2.2.2 tls #ifdef _MODULE 289 1.2.2.2 tls #include "ioconf.c" 290 1.2.2.2 tls #endif 291 1.2.2.2 tls 292 1.2.2.2 tls static int 293 1.2.2.2 tls hythygtemp_modcmd(modcmd_t cmd, void *opaque) 294 1.2.2.2 tls { 295 1.2.2.2 tls int error = 0; 296 1.2.2.2 tls 297 1.2.2.2 tls switch (cmd) { 298 1.2.2.2 tls case MODULE_CMD_INIT: 299 1.2.2.2 tls #ifdef _MODULE 300 1.2.2.2 tls error = config_init_component(cfdriver_ioconf_hythygtemp, 301 1.2.2.2 tls cfattach_ioconf_hythygtemp, cfdata_ioconf_hythygtemp); 302 1.2.2.2 tls #endif 303 1.2.2.2 tls return error; 304 1.2.2.2 tls 305 1.2.2.2 tls case MODULE_CMD_FINI: 306 1.2.2.2 tls #ifdef _MODULE 307 1.2.2.2 tls error = config_fini_component(cfdriver_ioconf_hythygtemp, 308 1.2.2.2 tls cfattach_ioconf_hythygtemp, cfdata_ioconf_hythygtemp); 309 1.2.2.2 tls #endif 310 1.2.2.2 tls return error; 311 1.2.2.2 tls 312 1.2.2.2 tls default: 313 1.2.2.2 tls return ENOTTY; 314 1.2.2.2 tls } 315 1.2.2.2 tls } 316
Indexes created Thu Oct 16 14:10:15 GMT 2025