pcf8591_envctrl.c revision 1.10
1 /* $NetBSD: pcf8591_envctrl.c,v 1.10 2020/10/24 15:16:39 jdc 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 1.10 2020/10/24 15:16:39 jdc 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 /* Translation tables contain 254 entries */ 38 #define XLATE_SIZE 256 39 #define XLATE_MAX (XLATE_SIZE - 2) 40 41 #define PCF8591_CHANNELS 4 42 43 #define PCF8591_CTRL_CH0 0x00 44 #define PCF8591_CTRL_CH1 0x01 45 #define PCF8591_CTRL_CH2 0x02 46 #define PCF8591_CTRL_CH3 0x03 47 #define PCF8591_CTRL_AUTOINC 0x04 48 #define PCF8591_CTRL_OSCILLATOR 0x40 49 50 #define PCF8591_TEMP_SENS 0x00 51 #define PCF8591_CPU_FAN_CTRL 0x01 52 #define PCF8591_PS_FAN_CTRL 0x02 53 54 struct ecadc_channel { 55 u_int chan_num; 56 u_int chan_type; 57 envsys_data_t chan_sensor; 58 u_char *chan_xlate; 59 int64_t chan_factor; 60 int64_t chan_min; 61 int64_t chan_warn; 62 int64_t chan_crit; 63 u_int8_t chan_speed; 64 }; 65 66 struct ecadc_softc { 67 device_t sc_dev; 68 i2c_tag_t sc_tag; 69 i2c_addr_t sc_addr; 70 u_char sc_ps_xlate[XLATE_SIZE]; 71 u_char sc_cpu_xlate[XLATE_SIZE]; 72 u_char sc_cpu_fan_spd[XLATE_SIZE]; 73 u_int sc_nchan; 74 struct ecadc_channel sc_channels[PCF8591_CHANNELS]; 75 struct sysmon_envsys *sc_sme; 76 int sc_hastimer; 77 callout_t sc_timer; 78 }; 79 80 static int ecadc_match(device_t, cfdata_t, void *); 81 static void ecadc_attach(device_t, device_t, void *); 82 static int ecadc_detach(device_t, int); 83 static void ecadc_refresh(struct sysmon_envsys *, envsys_data_t *); 84 static void ecadc_get_limits(struct sysmon_envsys *, envsys_data_t *, 85 sysmon_envsys_lim_t *, u_int32_t *); 86 static void ecadc_timeout(void *); 87 static void ecadc_fan_adjust(void *); 88 89 CFATTACH_DECL3_NEW(ecadc, sizeof(struct ecadc_softc), 90 ecadc_match, ecadc_attach, ecadc_detach, NULL, NULL, NULL, 91 DVF_DETACH_SHUTDOWN); 92 93 static const struct device_compatible_entry compat_data[] = { 94 { "ecadc", 0 }, 95 { NULL, 0 } 96 }; 97 98 static int 99 ecadc_match(device_t parent, cfdata_t cf, void *aux) 100 { 101 struct i2c_attach_args *ia = aux; 102 int match_result; 103 104 if (iic_use_direct_match(ia, cf, compat_data, &match_result)) 105 return match_result; 106 107 /* This driver is direct-config only. */ 108 109 return 0; 110 } 111 112 static void 113 ecadc_attach(device_t parent, device_t self, void *aux) 114 { 115 struct i2c_attach_args *ia = aux; 116 struct ecadc_softc *sc = device_private(self); 117 u_char term[256]; 118 u_char *cp, *desc; 119 int64_t minv, warnv, crit, num, den; 120 u_int8_t junk[PCF8591_CHANNELS + 1]; 121 envsys_data_t *sensor; 122 int len, error, addr, chan, node = (int)ia->ia_cookie; 123 u_int i; 124 125 sc->sc_dev = self; 126 sc->sc_nchan = 0; 127 sc->sc_hastimer = 0; 128 129 if ((len = OF_getprop(node, "thermisters", term, 130 sizeof(term))) < 0) { 131 aprint_error(": couldn't find \"thermisters\" property\n"); 132 return; 133 } 134 135 if (OF_getprop(node, "cpu-temp-factors", &sc->sc_cpu_xlate[2], 136 XLATE_MAX) < 0) { 137 aprint_error(": couldn't find \"cpu-temp-factors\" property\n"); 138 return; 139 } 140 sc->sc_cpu_xlate[0] = sc->sc_cpu_xlate[1] = sc->sc_cpu_xlate[2]; 141 142 /* Only the Sun Enterprise 450 has these. */ 143 OF_getprop(node, "ps-temp-factors", &sc->sc_ps_xlate[2], XLATE_MAX); 144 sc->sc_ps_xlate[0] = sc->sc_ps_xlate[1] = sc->sc_ps_xlate[2]; 145 146 cp = term; 147 while (cp < term + len) { 148 addr = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 149 chan = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 150 minv = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 151 warnv = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 152 crit = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 153 num = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 154 den = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 155 desc = cp; 156 while (cp < term + len && *cp++); 157 158 if (addr != (ia->ia_addr << 1)) 159 continue; 160 161 if (num == 0 || den == 0) 162 num = den = 1; 163 164 sc->sc_channels[sc->sc_nchan].chan_num = chan; 165 sc->sc_channels[sc->sc_nchan].chan_type = PCF8591_TEMP_SENS; 166 167 sensor = &sc->sc_channels[sc->sc_nchan].chan_sensor; 168 sensor->units = ENVSYS_STEMP; 169 sensor->flags |= ENVSYS_FMONLIMITS; 170 sensor->state = ENVSYS_SINVALID; 171 strlcpy(sensor->desc, desc, sizeof(sensor->desc)); 172 173 if (strncmp(desc, "CPU", 3) == 0) 174 sc->sc_channels[sc->sc_nchan].chan_xlate = 175 sc->sc_cpu_xlate; 176 else if (strncmp(desc, "PS", 2) == 0) 177 sc->sc_channels[sc->sc_nchan].chan_xlate = 178 sc->sc_ps_xlate; 179 else 180 sc->sc_channels[sc->sc_nchan].chan_factor = 181 (1000000 * num) / den; 182 sc->sc_channels[sc->sc_nchan].chan_min = 183 273150000 + 1000000 * minv; 184 sc->sc_channels[sc->sc_nchan].chan_warn = 185 273150000 + 1000000 * warnv; 186 sc->sc_channels[sc->sc_nchan].chan_crit = 187 273150000 + 1000000 * crit; 188 sc->sc_nchan++; 189 } 190 191 /* 192 * Fan speed changing information is missing from OFW 193 * The E250 CPU fan is connected to the sensor at addr 0x4a, channel 1 194 */ 195 if (ia->ia_addr == 0x4a && !strcmp(machine_model, "SUNW,Ultra-250") && 196 OF_getprop(node, "cpu-fan-speeds", &sc->sc_cpu_fan_spd, 197 XLATE_MAX) > 0) { 198 sc->sc_channels[sc->sc_nchan].chan_num = 1; 199 sc->sc_channels[sc->sc_nchan].chan_type = PCF8591_CPU_FAN_CTRL; 200 sc->sc_channels[sc->sc_nchan].chan_speed = 0; 201 sensor = &sc->sc_channels[sc->sc_nchan].chan_sensor; 202 sensor->units = ENVSYS_INTEGER; 203 sensor->flags = ENVSYS_FMONNOTSUPP; 204 sensor->state = ENVSYS_SINVALID; 205 strlcpy(sensor->desc, "CPUFAN", sizeof(sensor->desc)); 206 sc->sc_channels[sc->sc_nchan].chan_xlate = sc->sc_cpu_fan_spd; 207 sc->sc_nchan++; 208 209 sc->sc_hastimer = 1; 210 } 211 212 sc->sc_tag = ia->ia_tag; 213 sc->sc_addr = ia->ia_addr; 214 215 iic_acquire_bus(sc->sc_tag, 0); 216 217 /* Try a read now, so we can fail if it doesn't work */ 218 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, 219 NULL, 0, junk, sc->sc_nchan + 1, 0)) { 220 aprint_error(": read failed\n"); 221 iic_release_bus(sc->sc_tag, 0); 222 return; 223 } 224 225 iic_release_bus(sc->sc_tag, 0); 226 227 /* Hook us into the sysmon_envsys subsystem */ 228 sc->sc_sme = sysmon_envsys_create(); 229 sc->sc_sme->sme_name = device_xname(self); 230 sc->sc_sme->sme_cookie = sc; 231 sc->sc_sme->sme_refresh = ecadc_refresh; 232 sc->sc_sme->sme_get_limits = ecadc_get_limits; 233 234 /* Initialize sensor data. */ 235 for (i = 0; i < sc->sc_nchan; i++) 236 sysmon_envsys_sensor_attach(sc->sc_sme, 237 &sc->sc_channels[i].chan_sensor); 238 239 error = sysmon_envsys_register(sc->sc_sme); 240 if (error) { 241 aprint_error_dev(self, "error %d registering with sysmon\n", 242 error); 243 sysmon_envsys_destroy(sc->sc_sme); 244 return; 245 } 246 247 if (sc->sc_hastimer) { 248 callout_init(&sc->sc_timer, CALLOUT_MPSAFE); 249 callout_reset(&sc->sc_timer, hz*20, ecadc_timeout, sc); 250 } 251 252 aprint_naive(": Temp Sensors\n"); 253 aprint_normal(": %s Temp Sensors (%d channels)\n", ia->ia_name, 254 sc->sc_nchan); 255 } 256 257 static int 258 ecadc_detach(device_t self, int flags) 259 { 260 struct ecadc_softc *sc = device_private(self); 261 if (sc->sc_hastimer) { 262 callout_halt(&sc->sc_timer, NULL); 263 callout_destroy(&sc->sc_timer); 264 } 265 266 if (sc->sc_sme != NULL) 267 sysmon_envsys_destroy(sc->sc_sme); 268 269 return 0; 270 } 271 272 static void 273 ecadc_refresh(struct sysmon_envsys *sme, envsys_data_t *sensor) 274 { 275 struct ecadc_softc *sc = sme->sme_cookie; 276 u_int i; 277 u_int8_t data[PCF8591_CHANNELS + 1]; 278 u_int8_t ctrl = PCF8591_CTRL_CH0 | PCF8591_CTRL_AUTOINC | 279 PCF8591_CTRL_OSCILLATOR; 280 281 iic_acquire_bus(sc->sc_tag, 0); 282 if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, 283 &ctrl, 1, NULL, 0, 0)) { 284 iic_release_bus(sc->sc_tag, 0); 285 return; 286 } 287 /* 288 * Each data byte that we read is the result of the previous request, 289 * so read num_channels + 1 and update envsys values from chan + 1. 290 */ 291 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, 292 NULL, 0, data, PCF8591_CHANNELS + 1, 0)) { 293 iic_release_bus(sc->sc_tag, 0); 294 return; 295 } 296 iic_release_bus(sc->sc_tag, 0); 297 298 /* Temperature with/without translation or relative (ADC value) */ 299 for (i = 0; i < sc->sc_nchan; i++) { 300 struct ecadc_channel *chp = &sc->sc_channels[i]; 301 302 if (chp->chan_type == PCF8591_TEMP_SENS) { 303 304 /* Encode the raw value to use for the fan control */ 305 if (chp->chan_xlate) { 306 int32_t temp; 307 308 temp = 273150000 + 1000000 * 309 chp->chan_xlate[data[1 + chp->chan_num]]; 310 temp &= ~0xff; 311 temp += data[1 + chp->chan_num]; 312 chp->chan_sensor.value_cur = temp; 313 } else 314 chp->chan_sensor.value_cur = 273150000 + 315 chp->chan_factor * data[1 + chp->chan_num]; 316 chp->chan_sensor.flags |= ENVSYS_FMONLIMITS; 317 } 318 if (chp->chan_type == PCF8591_CPU_FAN_CTRL || 319 chp->chan_type == PCF8591_PS_FAN_CTRL) 320 chp->chan_sensor.value_cur = data[1 + chp->chan_num]; 321 322 chp->chan_sensor.state = ENVSYS_SVALID; 323 chp->chan_sensor.flags &= ~ENVSYS_FNEED_REFRESH; 324 } 325 } 326 327 static void 328 ecadc_get_limits(struct sysmon_envsys *sme, envsys_data_t *edata, 329 sysmon_envsys_lim_t *limits, u_int32_t *props) 330 { 331 struct ecadc_softc *sc = sme->sme_cookie; 332 int i; 333 334 for (i = 0; i < sc->sc_nchan; i++) { 335 if (edata != &sc->sc_channels[i].chan_sensor) 336 continue; 337 if (sc->sc_channels[i].chan_type == PCF8591_TEMP_SENS) { 338 *props |= PROP_WARNMIN|PROP_WARNMAX|PROP_CRITMAX; 339 limits->sel_warnmin = sc->sc_channels[i].chan_min; 340 limits->sel_warnmax = sc->sc_channels[i].chan_warn; 341 limits->sel_critmax = sc->sc_channels[i].chan_crit; 342 } 343 return; 344 } 345 } 346 347 static void 348 ecadc_timeout(void *v) 349 { 350 struct ecadc_softc *sc = v; 351 352 sysmon_task_queue_sched(0, ecadc_fan_adjust, sc); 353 callout_reset(&sc->sc_timer, hz*60, ecadc_timeout, sc); 354 } 355 356 static bool 357 is_cpu_temp(const envsys_data_t *edata) 358 { 359 if (edata->units != ENVSYS_STEMP) 360 return false; 361 return strncmp(edata->desc, "CPU", 3) == 0; 362 } 363 364 static int 365 ecadc_set_fan_speed(struct ecadc_softc *sc, u_int8_t chan, u_int8_t val) 366 { 367 u_int8_t ctrl = PCF8591_CTRL_AUTOINC | PCF8591_CTRL_OSCILLATOR; 368 int ret; 369 370 ctrl |= chan; 371 iic_acquire_bus(sc->sc_tag, 0); 372 ret = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, 373 &ctrl, 1, &val, 1, 0); 374 if (ret) 375 aprint_error_dev(sc->sc_dev, 376 "error changing fan speed (ch %d)\n", chan); 377 else 378 aprint_debug_dev(sc->sc_dev, 379 "changed fan speed (ch %d) to 0x%x\n", chan, val); 380 iic_release_bus(sc->sc_tag, 0); 381 return ret; 382 } 383 384 static void 385 ecadc_fan_adjust(void *v) 386 { 387 struct ecadc_softc *sc = v; 388 int i; 389 u_int8_t temp, speed; 390 391 for (i = 0; i < sc->sc_nchan; i++) { 392 struct ecadc_channel *chp = &sc->sc_channels[i]; 393 394 if (chp->chan_type == PCF8591_CPU_FAN_CTRL) { 395 /* Extract the raw value from the max CPU temp */ 396 temp = sysmon_envsys_get_max_value(is_cpu_temp, true) 397 & 0xff; 398 if (!temp) { 399 aprint_error_dev(sc->sc_dev, 400 "skipping temp adjustment" 401 " - no sensor values\n"); 402 return; 403 } 404 if (temp > XLATE_MAX) 405 temp = XLATE_MAX; 406 speed = chp->chan_xlate[temp]; 407 if (speed != chp->chan_speed) { 408 if (!ecadc_set_fan_speed(sc, chp->chan_num, 409 speed)) 410 chp->chan_speed = speed; 411 } 412 } 413 } 414 } 415
Indexes created Tue Sep 30 07:10:03 GMT 2025