pcf8591_envctrl.c revision 1.19.4.1
1 /* $NetBSD: pcf8591_envctrl.c,v 1.19.4.1 2021/05/15 03:22:17 thorpej Exp $ */ 2 /* $OpenBSD: pcf8591_envctrl.c,v 1.6 2007/10/25 21:17:20 kettenis Exp $ */ 3 4 /* 5 * Copyright (c) 2006 Damien Miller <djm (at) openbsd.org> 6 * Copyright (c) 2007 Mark Kettenis <kettenis (at) openbsd.org> 7 * 8 * Permission to use, copy, modify, and distribute this software for any 9 * purpose with or without fee is hereby granted, provided that the above 10 * copyright notice and this permission notice appear in all copies. 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19 */ 20 21 #include <sys/cdefs.h> 22 __KERNEL_RCSID(0, "$NetBSD: pcf8591_envctrl.c,v 1.19.4.1 2021/05/15 03:22:17 thorpej Exp $"); 23 24 #include <sys/param.h> 25 #include <sys/systm.h> 26 #include <sys/kernel.h> 27 #include <sys/device.h> 28 29 #include <dev/sysmon/sysmonvar.h> 30 #include <dev/sysmon/sysmon_taskq.h> 31 32 #include <machine/autoconf.h> 33 34 #include <dev/ofw/openfirm.h> 35 #include <dev/i2c/i2cvar.h> 36 37 #ifdef ECADC_DEBUG 38 #define DPRINTF printf 39 #else 40 #define DPRINTF if (0) printf 41 #endif 42 43 /* Translation tables contain 254 entries */ 44 #define XLATE_SIZE 256 45 #define XLATE_MAX (XLATE_SIZE - 2) 46 47 #define PCF8591_CHANNELS 4 48 49 #define PCF8591_CTRL_CH0 0x00 50 #define PCF8591_CTRL_CH1 0x01 51 #define PCF8591_CTRL_CH2 0x02 52 #define PCF8591_CTRL_CH3 0x03 53 #define PCF8591_CTRL_AUTOINC 0x04 54 #define PCF8591_CTRL_OSCILLATOR 0x40 55 56 #define PCF8591_TEMP_SENS 0x00 57 #define PCF8591_SYS_FAN_CTRL 0x01 58 59 struct ecadc_channel { 60 u_int chan_num; 61 u_int chan_type; 62 envsys_data_t chan_sensor; 63 u_char *chan_xlate; 64 int64_t chan_factor; 65 int64_t chan_min; 66 int64_t chan_warn; 67 int64_t chan_crit; 68 u_int8_t chan_speed; 69 }; 70 71 struct ecadc_softc { 72 device_t sc_dev; 73 i2c_tag_t sc_tag; 74 i2c_addr_t sc_addr; 75 u_char sc_ps_xlate[XLATE_SIZE]; 76 u_char sc_cpu_xlate[XLATE_SIZE]; 77 u_char sc_cpu_fan_spd[XLATE_SIZE]; 78 u_int sc_nchan; 79 struct ecadc_channel sc_channels[PCF8591_CHANNELS]; 80 struct sysmon_envsys *sc_sme; 81 int sc_hastimer; 82 callout_t sc_timer; 83 }; 84 85 static int ecadc_match(device_t, cfdata_t, void *); 86 static void ecadc_attach(device_t, device_t, void *); 87 static int ecadc_detach(device_t, int); 88 static void ecadc_refresh(struct sysmon_envsys *, envsys_data_t *); 89 static void ecadc_get_limits(struct sysmon_envsys *, envsys_data_t *, 90 sysmon_envsys_lim_t *, u_int32_t *); 91 static int ecadc_set_fan_speed(struct ecadc_softc *, u_int8_t, u_int8_t); 92 static void ecadc_timeout(void *); 93 static void ecadc_fan_adjust(void *); 94 95 CFATTACH_DECL3_NEW(ecadc, sizeof(struct ecadc_softc), 96 ecadc_match, ecadc_attach, ecadc_detach, NULL, NULL, NULL, 97 DVF_DETACH_SHUTDOWN); 98 99 static const struct device_compatible_entry compat_data[] = { 100 { .compat = "ecadc" }, 101 DEVICE_COMPAT_EOL 102 }; 103 104 static int 105 ecadc_match(device_t parent, cfdata_t cf, void *aux) 106 { 107 struct i2c_attach_args *ia = aux; 108 int match_result; 109 110 if (iic_use_direct_match(ia, cf, compat_data, &match_result)) 111 return match_result; 112 113 /* This driver is direct-config only. */ 114 115 return 0; 116 } 117 118 static void 119 ecadc_attach(device_t parent, device_t self, void *aux) 120 { 121 struct i2c_attach_args *ia = aux; 122 struct ecadc_softc *sc = device_private(self); 123 u_char term[256]; 124 u_char *cp, *desc; 125 int64_t minv, warnv, crit, num, den; 126 u_int8_t junk[PCF8591_CHANNELS + 1]; 127 envsys_data_t *sensor; 128 int len, error, addr, chan, node; 129 u_int i; 130 131 node = devhandle_to_of(device_handle(self)); 132 133 sc->sc_dev = self; 134 sc->sc_nchan = 0; 135 sc->sc_hastimer = 0; 136 137 DPRINTF("\n"); 138 if ((len = OF_getprop(node, "thermisters", term, 139 sizeof(term))) < 0) { 140 aprint_error(": couldn't find \"thermisters\" property\n"); 141 return; 142 } 143 144 if (OF_getprop(node, "cpu-temp-factors", &sc->sc_cpu_xlate[2], 145 XLATE_MAX) < 0) { 146 aprint_error(": couldn't find \"cpu-temp-factors\" property\n"); 147 return; 148 } 149 sc->sc_cpu_xlate[0] = sc->sc_cpu_xlate[1] = sc->sc_cpu_xlate[2]; 150 151 /* Only the Sun Enterprise 450 has these. */ 152 OF_getprop(node, "ps-temp-factors", &sc->sc_ps_xlate[2], XLATE_MAX); 153 sc->sc_ps_xlate[0] = sc->sc_ps_xlate[1] = sc->sc_ps_xlate[2]; 154 155 cp = term; 156 while (cp < term + len) { 157 addr = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 158 chan = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 159 minv = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 160 warnv = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 161 crit = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 162 num = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 163 den = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 164 desc = cp; 165 while (cp < term + len && *cp++); 166 167 if (addr != (ia->ia_addr << 1)) 168 continue; 169 170 if (num == 0 || den == 0) 171 num = den = 1; 172 173 sc->sc_channels[sc->sc_nchan].chan_num = chan; 174 sc->sc_channels[sc->sc_nchan].chan_type = PCF8591_TEMP_SENS; 175 176 sensor = &sc->sc_channels[sc->sc_nchan].chan_sensor; 177 sensor->units = ENVSYS_STEMP; 178 sensor->flags |= ENVSYS_FMONLIMITS; 179 sensor->state = ENVSYS_SINVALID; 180 strlcpy(sensor->desc, desc, sizeof(sensor->desc)); 181 182 if (strncmp(desc, "CPU", 3) == 0) { 183 sc->sc_channels[sc->sc_nchan].chan_xlate = 184 sc->sc_cpu_xlate; 185 DPRINTF("%s: " 186 "added %s sensor (chan %d) with cpu_xlate\n", 187 device_xname(sc->sc_dev), desc, chan); 188 } else if (strncmp(desc, "PS", 2) == 0) { 189 sc->sc_channels[sc->sc_nchan].chan_xlate = 190 sc->sc_ps_xlate; 191 DPRINTF("%s: " 192 "added %s sensor (chan %d) with ps_xlate\n", 193 device_xname(sc->sc_dev), desc, chan); 194 } else { 195 sc->sc_channels[sc->sc_nchan].chan_factor = 196 (1000000 * num) / den; 197 DPRINTF("%s: " 198 "added %s sensor (chan %d) without xlate\n", 199 device_xname(sc->sc_dev), desc, chan); 200 } 201 sc->sc_channels[sc->sc_nchan].chan_min = 202 273150000 + 1000000 * minv; 203 sc->sc_channels[sc->sc_nchan].chan_warn = 204 273150000 + 1000000 * warnv; 205 sc->sc_channels[sc->sc_nchan].chan_crit = 206 273150000 + 1000000 * crit; 207 sc->sc_nchan++; 208 } 209 210 sc->sc_tag = ia->ia_tag; 211 sc->sc_addr = ia->ia_addr; 212 213 iic_acquire_bus(sc->sc_tag, 0); 214 215 /* Try a read now, so we can fail if this component isn't present */ 216 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, 217 NULL, 0, junk, sc->sc_nchan + 1, 0)) { 218 aprint_normal(": read failed\n"); 219 iic_release_bus(sc->sc_tag, 0); 220 return; 221 } 222 223 iic_release_bus(sc->sc_tag, 0); 224 225 /* 226 * Fan speed changing information is missing from OFW 227 * The E250 CPU fan is connected to the sensor at addr 0x4a, channel 1 228 */ 229 if (ia->ia_addr == 0x4a && !strcmp(machine_model, "SUNW,Ultra-250") && 230 OF_getprop(node, "cpu-fan-speeds", &sc->sc_cpu_fan_spd, 231 XLATE_MAX) > 0) { 232 sc->sc_channels[sc->sc_nchan].chan_num = 1; 233 sc->sc_channels[sc->sc_nchan].chan_type = PCF8591_SYS_FAN_CTRL; 234 sensor = &sc->sc_channels[sc->sc_nchan].chan_sensor; 235 sensor->units = ENVSYS_INTEGER; 236 sensor->flags = ENVSYS_FMONNOTSUPP; 237 sensor->state = ENVSYS_SINVALID; 238 strlcpy(sensor->desc, "SYSFAN", sizeof(sensor->desc)); 239 sc->sc_channels[sc->sc_nchan].chan_xlate = sc->sc_cpu_fan_spd; 240 DPRINTF("%s: " 241 "added CPUFAN sensor (chan %d) with cpu-fan xlate\n", 242 device_xname(sc->sc_dev), 243 sc->sc_channels[sc->sc_nchan].chan_num); 244 245 /* Set the fan to medium speed */ 246 sc->sc_channels[sc->sc_nchan].chan_speed = 247 (sc->sc_cpu_fan_spd[0]+sc->sc_cpu_fan_spd[XLATE_MAX])/2; 248 ecadc_set_fan_speed(sc, sc->sc_channels[sc->sc_nchan].chan_num, 249 sc->sc_channels[sc->sc_nchan].chan_speed); 250 251 sc->sc_nchan++; 252 sc->sc_hastimer = 1; 253 } 254 255 /* Hook us into the sysmon_envsys subsystem */ 256 sc->sc_sme = sysmon_envsys_create(); 257 sc->sc_sme->sme_name = device_xname(self); 258 sc->sc_sme->sme_cookie = sc; 259 sc->sc_sme->sme_refresh = ecadc_refresh; 260 sc->sc_sme->sme_get_limits = ecadc_get_limits; 261 262 /* Initialize sensor data. */ 263 for (i = 0; i < sc->sc_nchan; i++) 264 sysmon_envsys_sensor_attach(sc->sc_sme, 265 &sc->sc_channels[i].chan_sensor); 266 267 error = sysmon_envsys_register(sc->sc_sme); 268 if (error) { 269 aprint_error_dev(self, "error %d registering with sysmon\n", 270 error); 271 sysmon_envsys_destroy(sc->sc_sme); 272 sc->sc_sme = NULL; 273 return; 274 } 275 276 if (sc->sc_hastimer) { 277 callout_init(&sc->sc_timer, CALLOUT_MPSAFE); 278 callout_reset(&sc->sc_timer, hz*20, ecadc_timeout, sc); 279 } 280 281 aprint_naive(": Temp Sensors\n"); 282 aprint_normal(": %s Temp Sensors (%d channels)\n", ia->ia_name, 283 sc->sc_nchan); 284 } 285 286 static int 287 ecadc_detach(device_t self, int flags) 288 { 289 struct ecadc_softc *sc = device_private(self); 290 int c, i; 291 292 if (sc->sc_hastimer) { 293 callout_halt(&sc->sc_timer, NULL); 294 callout_destroy(&sc->sc_timer); 295 } 296 297 if (sc->sc_sme != NULL) 298 sysmon_envsys_unregister(sc->sc_sme); 299 300 for (i = 0; i < sc->sc_nchan; i++) { 301 struct ecadc_channel *chp = &sc->sc_channels[i]; 302 303 if (chp->chan_type == PCF8591_SYS_FAN_CTRL) { 304 /* Loop in case the bus is busy */ 305 for (c = 0; c < 5; c++) { 306 chp->chan_speed = sc->sc_cpu_fan_spd[0]; 307 if (!ecadc_set_fan_speed(sc, chp->chan_num, 308 chp->chan_speed)) 309 return 0; 310 delay(10000); 311 } 312 printf("%s: cannot set fan speed (chan %d)\n", 313 device_xname(sc->sc_dev), chp->chan_num); 314 } 315 } 316 317 return 0; 318 } 319 320 static void 321 ecadc_refresh(struct sysmon_envsys *sme, envsys_data_t *sensor) 322 { 323 struct ecadc_softc *sc = sme->sme_cookie; 324 u_int i; 325 u_int8_t data[PCF8591_CHANNELS + 1]; 326 u_int8_t ctrl = PCF8591_CTRL_CH0 | PCF8591_CTRL_AUTOINC | 327 PCF8591_CTRL_OSCILLATOR; 328 329 if (iic_acquire_bus(sc->sc_tag, 0)) 330 return; 331 if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, 332 &ctrl, 1, NULL, 0, 0)) { 333 iic_release_bus(sc->sc_tag, 0); 334 return; 335 } 336 /* 337 * Each data byte that we read is the result of the previous request, 338 * so read num_channels + 1 and update envsys values from chan + 1. 339 */ 340 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, 341 NULL, 0, data, PCF8591_CHANNELS + 1, 0)) { 342 iic_release_bus(sc->sc_tag, 0); 343 return; 344 } 345 iic_release_bus(sc->sc_tag, 0); 346 347 /* Temperature with/without translation or relative (ADC value) */ 348 for (i = 0; i < sc->sc_nchan; i++) { 349 struct ecadc_channel *chp = &sc->sc_channels[i]; 350 351 if (chp->chan_type == PCF8591_TEMP_SENS) { 352 353 /* Encode the raw value to use for the fan control */ 354 if (chp->chan_xlate) { 355 int32_t temp; 356 357 temp = 273150000 + 1000000 * 358 chp->chan_xlate[data[1 + chp->chan_num]]; 359 temp &= ~0xff; 360 temp += data[1 + chp->chan_num]; 361 chp->chan_sensor.value_cur = temp; 362 DPRINTF("%s: xlate %s sensor = %d" 363 " (0x%x > 0x%x)\n", 364 device_xname(sc->sc_dev), 365 chp->chan_sensor.desc, temp, 366 data[1 + chp->chan_num], 367 chp->chan_xlate[data[1 + chp->chan_num]]); 368 } else { 369 chp->chan_sensor.value_cur = 273150000 + 370 chp->chan_factor * data[1 + chp->chan_num]; 371 DPRINTF("%s: read %s sensor = %d (0x%x)\n", 372 device_xname(sc->sc_dev), 373 chp->chan_sensor.desc, 374 chp->chan_sensor.value_cur, 375 data[1 + chp->chan_num]); 376 } 377 chp->chan_sensor.flags |= ENVSYS_FMONLIMITS; 378 } 379 if (chp->chan_type == PCF8591_SYS_FAN_CTRL) 380 chp->chan_sensor.value_cur = data[1 + chp->chan_num]; 381 382 chp->chan_sensor.state = ENVSYS_SVALID; 383 } 384 } 385 386 static void 387 ecadc_get_limits(struct sysmon_envsys *sme, envsys_data_t *edata, 388 sysmon_envsys_lim_t *limits, u_int32_t *props) 389 { 390 struct ecadc_softc *sc = sme->sme_cookie; 391 int i; 392 393 for (i = 0; i < sc->sc_nchan; i++) { 394 if (edata != &sc->sc_channels[i].chan_sensor) 395 continue; 396 if (sc->sc_channels[i].chan_type == PCF8591_TEMP_SENS) { 397 *props |= PROP_WARNMIN|PROP_WARNMAX|PROP_CRITMAX; 398 limits->sel_warnmin = sc->sc_channels[i].chan_min; 399 limits->sel_warnmax = sc->sc_channels[i].chan_warn; 400 limits->sel_critmax = sc->sc_channels[i].chan_crit; 401 } 402 return; 403 } 404 } 405 406 static void 407 ecadc_timeout(void *v) 408 { 409 struct ecadc_softc *sc = v; 410 411 sysmon_task_queue_sched(0, ecadc_fan_adjust, sc); 412 callout_reset(&sc->sc_timer, hz*60, ecadc_timeout, sc); 413 } 414 415 static bool 416 is_cpu_temp(const envsys_data_t *edata) 417 { 418 if (edata->units != ENVSYS_STEMP) 419 return false; 420 return strncmp(edata->desc, "CPU", 3) == 0; 421 } 422 423 static bool 424 is_high_temp(const envsys_data_t *edata) 425 { 426 if (edata->units != ENVSYS_INDICATOR) 427 return false; 428 return strcmp(edata->desc, "high_temp") == 0; 429 } 430 431 static bool 432 is_fan_fail(const envsys_data_t *edata) 433 { 434 if (edata->units != ENVSYS_INDICATOR) 435 return false; 436 return strcmp(edata->desc, "fan_fail") == 0; 437 } 438 439 static int 440 ecadc_set_fan_speed(struct ecadc_softc *sc, u_int8_t chan, u_int8_t val) 441 { 442 u_int8_t ctrl = PCF8591_CTRL_AUTOINC | PCF8591_CTRL_OSCILLATOR; 443 int ret; 444 445 ctrl |= chan; 446 ret = iic_acquire_bus(sc->sc_tag, 0); 447 if (ret) { 448 printf("%s: error acquiring i2c bus (ch %d)\n", 449 device_xname(sc->sc_dev), chan); 450 return ret; 451 } 452 ret = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, 453 &ctrl, 1, &val, 1, 0); 454 if (ret) 455 printf("%s: error changing fan speed (ch %d)\n", 456 device_xname(sc->sc_dev), chan); 457 else 458 DPRINTF("%s changed fan speed (ch %d) to 0x%x\n", 459 device_xname(sc->sc_dev), chan, val); 460 iic_release_bus(sc->sc_tag, 0); 461 return ret; 462 } 463 464 static void 465 ecadc_fan_adjust(void *v) 466 { 467 struct ecadc_softc *sc = v; 468 struct ecadc_channel *chp; 469 int i; 470 u_int8_t temp, speed; 471 u_int32_t htemp, ffail; 472 473 for (i = 0; i < sc->sc_nchan; i++) { 474 chp = &sc->sc_channels[i]; 475 if (chp->chan_type != PCF8591_SYS_FAN_CTRL) 476 continue; 477 478 /* Check for high temperature or fan failure */ 479 htemp = sysmon_envsys_get_max_value(is_high_temp, true); 480 ffail = sysmon_envsys_get_max_value(is_fan_fail, true); 481 if (htemp) { 482 printf("%s: High temperature detected\n", 483 device_xname(sc->sc_dev)); 484 /* Set fans to maximum speed */ 485 speed = sc->sc_cpu_fan_spd[0]; 486 } else if (ffail) { 487 printf("%s: Fan failure detected\n", 488 device_xname(sc->sc_dev)); 489 /* Set fans to maximum speed */ 490 speed = sc->sc_cpu_fan_spd[0]; 491 } else { 492 /* Extract the raw value from the max CPU temp */ 493 temp = sysmon_envsys_get_max_value(is_cpu_temp, true) 494 & 0xff; 495 if (!temp) { 496 printf("%s: skipping temp adjustment" 497 " - no sensor values\n", 498 device_xname(sc->sc_dev)); 499 return; 500 } 501 if (temp > XLATE_MAX) 502 temp = XLATE_MAX; 503 speed = chp->chan_xlate[temp]; 504 } 505 if (speed != chp->chan_speed) { 506 if (!ecadc_set_fan_speed(sc, chp->chan_num, 507 speed)) 508 chp->chan_speed = speed; 509 } 510 } 511 } 512
Indexes created Thu Oct 02 14:10:14 GMT 2025