sdtemp.c revision 1.40
1 /* $NetBSD: sdtemp.c,v 1.40 2021/06/13 09:47:36 mlelstv Exp $ */ 2 3 /* 4 * Copyright (c) 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Goyette. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: sdtemp.c,v 1.40 2021/06/13 09:47:36 mlelstv Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kmem.h> 38 #include <sys/device.h> 39 #include <sys/kernel.h> 40 #include <sys/endian.h> 41 #include <sys/module.h> 42 43 #include <dev/sysmon/sysmonvar.h> 44 45 #include <dev/i2c/i2cvar.h> 46 #include <dev/i2c/sdtemp_reg.h> 47 48 struct sdtemp_softc { 49 device_t sc_dev; 50 i2c_tag_t sc_tag; 51 int sc_address; 52 53 struct sysmon_envsys *sc_sme; 54 envsys_data_t *sc_sensor; 55 sysmon_envsys_lim_t sc_deflims; 56 uint32_t sc_defprops; 57 int sc_resolution; 58 uint16_t sc_mfgid; 59 uint16_t sc_devid; 60 uint16_t sc_devid_masked; 61 uint16_t sc_capability; 62 }; 63 64 static int sdtemp_match(device_t, cfdata_t, void *); 65 static void sdtemp_attach(device_t, device_t, void *); 66 static int sdtemp_detach(device_t, int); 67 68 CFATTACH_DECL_NEW(sdtemp, sizeof(struct sdtemp_softc), 69 sdtemp_match, sdtemp_attach, sdtemp_detach, NULL); 70 71 static void sdtemp_refresh(struct sysmon_envsys *, envsys_data_t *); 72 static void sdtemp_get_limits(struct sysmon_envsys *, envsys_data_t *, 73 sysmon_envsys_lim_t *, uint32_t *); 74 static void sdtemp_set_limits(struct sysmon_envsys *, envsys_data_t *, 75 sysmon_envsys_lim_t *, uint32_t *); 76 #ifdef NOT_YET 77 static int sdtemp_read_8(struct sdtemp_softc *, uint8_t, uint8_t *); 78 static int sdtemp_write_8(struct sdtemp_softc *, uint8_t, uint8_t); 79 #endif /* NOT YET */ 80 static int sdtemp_read_16(struct sdtemp_softc *, uint8_t, uint16_t *); 81 static int sdtemp_write_16(struct sdtemp_softc *, uint8_t, uint16_t); 82 static uint32_t sdtemp_decode_temp(struct sdtemp_softc *, uint16_t); 83 static bool sdtemp_pmf_suspend(device_t, const pmf_qual_t *); 84 static bool sdtemp_pmf_resume(device_t, const pmf_qual_t *); 85 /* Device dependent config functions */ 86 static void sdtemp_config_mcp(struct sdtemp_softc *); 87 static void sdtemp_config_idt(struct sdtemp_softc *); 88 89 struct sdtemp_dev_entry { 90 const uint16_t sdtemp_mfg_id; 91 const uint16_t sdtemp_devrev; 92 const uint16_t sdtemp_mask; 93 void (*sdtemp_config)(struct sdtemp_softc *); 94 const char *sdtemp_desc; 95 }; 96 97 /* Convert sysmon_envsys uKelvin value to simple degC */ 98 99 #define __UK2C(uk) (((uk) - 273150000) / 1000000) 100 101 /* List of devices known to conform to JEDEC JC42.4 */ 102 103 #define CMCP sdtemp_config_mcp 104 #define CIDT sdtemp_config_idt 105 106 static const struct sdtemp_dev_entry 107 sdtemp_dev_table[] = { 108 { AT_MANUFACTURER_ID, AT_30TS00_DEVICE_ID, AT_30TS00_MASK, NULL, 109 "Atmel AT30TS00" }, 110 { AT2_MANUFACTURER_ID, AT2_30TSE004_DEVICE_ID, AT2_30TSE004_MASK, NULL, 111 "Atmel AT30TSE004" }, 112 { GT_MANUFACTURER_ID, GT_30TS00_DEVICE_ID, GT_30TS00_MASK, NULL, 113 "Giantec GT30TS00" }, 114 { GT2_MANUFACTURER_ID, GT2_34TS02_DEVICE_ID, GT2_34TS02_MASK, NULL, 115 "Giantec GT34TS02" }, 116 { MAXIM_MANUFACTURER_ID, MAX_6604_DEVICE_ID, MAX_6604_MASK, NULL, 117 "Maxim MAX6604" }, 118 { MAXIM_MANUFACTURER_ID, MAX_6604_2_DEVICE_ID, MAX_6604_MASK, NULL, 119 "Maxim MAX6604" }, 120 { MCP_MANUFACTURER_ID, MCP_9804_DEVICE_ID, MCP_9804_MASK, CMCP, 121 "Microchip Tech MCP9804" }, 122 { MCP_MANUFACTURER_ID, MCP_9805_DEVICE_ID, MCP_9805_MASK, NULL, 123 "Microchip Tech MCP9805/MCP9843" }, 124 { MCP_MANUFACTURER_ID, MCP_98242_DEVICE_ID, MCP_98242_MASK, CMCP, 125 "Microchip Tech MCP98242" }, 126 { MCP_MANUFACTURER_ID, MCP_98243_DEVICE_ID, MCP_98243_MASK, CMCP, 127 "Microchip Tech MCP98243" }, 128 { MCP_MANUFACTURER_ID, MCP_98244_DEVICE_ID, MCP_98244_MASK, CMCP, 129 "Microchip Tech MCP98244" }, 130 { MCP2_MANUFACTURER_ID, MCP2_EMC1501_DEVICE_ID, MCP2_EMC1501_MASK, NULL, 131 "Microchip Tech EMC1501" }, 132 { ADT_MANUFACTURER_ID, ADT_7408_DEVICE_ID, ADT_7408_MASK, NULL, 133 "Analog Devices ADT7408" }, 134 { NXP_MANUFACTURER_ID, NXP_SE98_DEVICE_ID, NXP_SE98_MASK, NULL, 135 "NXP Semiconductors SE97B/SE98" }, 136 { NXP_MANUFACTURER_ID, NXP_SE97_DEVICE_ID, NXP_SE97_MASK, NULL, 137 "NXP Semiconductors SE97" }, 138 { STTS_MANUFACTURER_ID, STTS_424E_DEVICE_ID, STTS_424E_MASK, NULL, 139 "STmicroelectronics STTS424E" }, 140 { STTS_MANUFACTURER_ID, STTS_424_DEVICE_ID, STTS_424_MASK, NULL, 141 "STmicroelectronics STTS424" }, 142 { STTS_MANUFACTURER_ID, STTS_2002_DEVICE_ID, STTS_2002_MASK, NULL, 143 "STmicroelectronics STTS2002" }, 144 { STTS_MANUFACTURER_ID, STTS_2004_DEVICE_ID, STTS_2004_MASK, NULL, 145 "STmicroelectronics STTS2004" }, 146 { STTS_MANUFACTURER_ID, STTS_3000_DEVICE_ID, STTS_3000_MASK, NULL, 147 "STmicroelectronics STTS3000" }, 148 { CAT_MANUFACTURER_ID, CAT_34TS02_DEVICE_ID, CAT_34TS02_MASK, NULL, 149 "Catalyst CAT34TS02/CAT6095" }, 150 { CAT_MANUFACTURER_ID, CAT_34TS02C_DEVICE_ID, CAT_34TS02C_MASK, NULL, 151 "Catalyst CAT34TS02C" }, 152 { CAT_MANUFACTURER_ID, CAT_34TS04_DEVICE_ID, CAT_34TS04_MASK, NULL, 153 "Catalyst CAT34TS04" }, 154 { IDT_MANUFACTURER_ID, IDT_TSE2004GB2_DEVICE_ID,IDT_TSE2004GB2_MASK, NULL, 155 "Integrated Device Technology TSE2004GB2" }, 156 { IDT_MANUFACTURER_ID, IDT_TS3000B3_DEVICE_ID, IDT_TS3000B3_MASK, CIDT, 157 "Integrated Device Technology TS3000B3/TSE2002B3" }, 158 { IDT_MANUFACTURER_ID, IDT_TS3000GB0_DEVICE_ID, IDT_TS3000GB0_MASK, CIDT, 159 "Integrated Device Technology TS3000GB0" }, 160 { IDT_MANUFACTURER_ID, IDT_TS3000GB2_DEVICE_ID, IDT_TS3000GB2_MASK, CIDT, 161 "Integrated Device Technology TS3000GB2" }, 162 { IDT_MANUFACTURER_ID, IDT_TS3001GB2_DEVICE_ID, IDT_TS3001GB2_MASK, CIDT, 163 "Integrated Device Technology TS3001GB2" }, 164 /* 165 * Don't change the location of the following two entries. Device specific 166 * entry must be located at above. 167 */ 168 { 0, TSE2004AV_ID, TSE2004AV_MASK, NULL, 169 "TSE2004av compliant device (generic driver)" }, 170 { 0, 0, 0, NULL, "Unknown" } 171 }; 172 173 #undef CMCP 174 #undef CIDT 175 176 static const char *temp_resl[] = { 177 "0.5C", 178 "0.25C", 179 "0.125C", 180 "0.0625C" 181 }; 182 183 static int 184 sdtemp_lookup(uint16_t mfg, uint16_t devrev) 185 { 186 int i; 187 188 for (i = 0; sdtemp_dev_table[i].sdtemp_mfg_id; i++) { 189 if (mfg != sdtemp_dev_table[i].sdtemp_mfg_id) 190 continue; 191 if ((devrev & sdtemp_dev_table[i].sdtemp_mask) == 192 sdtemp_dev_table[i].sdtemp_devrev) 193 break; 194 } 195 /* Check TSE2004av */ 196 if ((sdtemp_dev_table[i].sdtemp_mfg_id == 0) 197 && (SDTEMP_IS_TSE2004AV(devrev) == 0)) 198 i++; /* Unknown */ 199 200 return i; 201 } 202 203 static int 204 sdtemp_match(device_t parent, cfdata_t cf, void *aux) 205 { 206 struct i2c_attach_args *ia = aux; 207 uint16_t mfgid, devid, cap; 208 struct sdtemp_softc sc; 209 int i, error; 210 211 sc.sc_tag = ia->ia_tag; 212 sc.sc_address = ia->ia_addr; 213 214 if ((ia->ia_addr & SDTEMP_ADDRMASK) != SDTEMP_ADDR) 215 return 0; 216 217 /* 218 * Verify that we can read the manufacturer ID, Device ID and the 219 * capability 220 */ 221 error = iic_acquire_bus(sc.sc_tag, 0); 222 if (error) 223 return 0; 224 error = sdtemp_read_16(&sc, SDTEMP_REG_MFG_ID, &mfgid) | 225 sdtemp_read_16(&sc, SDTEMP_REG_DEV_REV, &devid) | 226 sdtemp_read_16(&sc, SDTEMP_REG_CAPABILITY, &cap); 227 iic_release_bus(sc.sc_tag, 0); 228 229 if (error) 230 return 0; 231 232 i = sdtemp_lookup(mfgid, devid); 233 if ((sdtemp_dev_table[i].sdtemp_mfg_id == 0) && 234 (sdtemp_dev_table[i].sdtemp_devrev == 0)) { 235 aprint_debug("sdtemp: No match for mfg 0x%04x dev 0x%02x " 236 "rev 0x%02x at address 0x%02x\n", mfgid, devid >> 8, 237 devid & 0xff, sc.sc_address); 238 return 0; 239 } 240 241 /* 242 * Check by SDTEMP_IS_TSE2004AV() might not be enough, so check the 243 * alarm capability, too. 244 */ 245 if ((cap & SDTEMP_CAP_HAS_ALARM) == 0) 246 return 0; 247 248 return I2C_MATCH_ADDRESS_AND_PROBE; 249 } 250 251 static void 252 sdtemp_attach(device_t parent, device_t self, void *aux) 253 { 254 struct sdtemp_softc *sc = device_private(self); 255 struct i2c_attach_args *ia = aux; 256 uint16_t mfgid, devid; 257 int i, error; 258 259 sc->sc_tag = ia->ia_tag; 260 sc->sc_address = ia->ia_addr; 261 sc->sc_dev = self; 262 263 error = iic_acquire_bus(sc->sc_tag, 0); 264 if (error) 265 return; 266 267 if ((error = sdtemp_read_16(sc, SDTEMP_REG_MFG_ID, &mfgid)) != 0 || 268 (error = sdtemp_read_16(sc, SDTEMP_REG_DEV_REV, &devid)) != 0) { 269 iic_release_bus(sc->sc_tag, 0); 270 aprint_error(": attach error %d\n", error); 271 return; 272 } 273 sc->sc_mfgid = mfgid; 274 sc->sc_devid = devid; 275 i = sdtemp_lookup(mfgid, devid); 276 sc->sc_devid_masked = devid & sdtemp_dev_table[i].sdtemp_mask; 277 278 aprint_naive(": Temp Sensor\n"); 279 aprint_normal(": %s Temp Sensor\n", sdtemp_dev_table[i].sdtemp_desc); 280 281 if (sdtemp_dev_table[i].sdtemp_mfg_id == 0) { 282 if (SDTEMP_IS_TSE2004AV(devid)) 283 aprint_normal_dev(self, "TSE2004av compliant. " 284 "Manufacturer ID 0x%04hx, Device revision 0x%02x\n", 285 mfgid, devid & TSE2004AV_REV); 286 else { 287 aprint_error_dev(self, 288 "mfg 0x%04x dev 0x%02x rev 0x%02x at addr 0x%02x\n", 289 mfgid, devid >> 8, devid & 0xff, ia->ia_addr); 290 iic_release_bus(sc->sc_tag, 0); 291 aprint_error_dev(self, "It should no happen. " 292 "Why attach() found me?\n"); 293 return; 294 } 295 } 296 297 error = sdtemp_read_16(sc, SDTEMP_REG_CAPABILITY, &sc->sc_capability); 298 aprint_debug_dev(self, "capability reg = %04x\n", sc->sc_capability); 299 sc->sc_resolution 300 = __SHIFTOUT(sc->sc_capability, SDTEMP_CAP_RESOLUTION); 301 /* 302 * Call device dependent function here. Currently, it's used for 303 * the resolution. 304 * 305 * IDT's devices and some Microchip's devices have the resolution 306 * register in the vendor specific registers area. The devices' 307 * resolution bits in the capability register are not the maximum 308 * resolution but the current value of the setting. 309 */ 310 if (sdtemp_dev_table[i].sdtemp_config != NULL) 311 sdtemp_dev_table[i].sdtemp_config(sc); 312 313 aprint_normal_dev(self, "%s accuracy", 314 (sc->sc_capability & SDTEMP_CAP_ACCURACY_1C) ? "high" : "default"); 315 if ((sc->sc_capability & SDTEMP_CAP_WIDER_RANGE) != 0) 316 aprint_normal(", wider range"); 317 aprint_normal(", %s resolution", temp_resl[sc->sc_resolution]); 318 if ((sc->sc_capability & SDTEMP_CAP_VHV) != 0) 319 aprint_debug(", high voltage standoff"); 320 aprint_debug(", %s timeout", 321 (sc->sc_capability & SDTEMP_CAP_TMOUT) ? "25-35ms" : "10-60ms"); 322 if ((sc->sc_capability & SDTEMP_CAP_EVSD) != 0) 323 aprint_normal(", event with shutdown"); 324 aprint_normal("\n"); 325 /* 326 * Alarm capability is required; if not present, this is likely 327 * not a real sdtemp device. 328 */ 329 if (error != 0 || (sc->sc_capability & SDTEMP_CAP_HAS_ALARM) == 0) { 330 iic_release_bus(sc->sc_tag, 0); 331 aprint_error_dev(self, 332 "required alarm capability not present!\n"); 333 return; 334 } 335 /* Set the configuration to defaults. */ 336 error = sdtemp_write_16(sc, SDTEMP_REG_CONFIG, 0); 337 if (error != 0) { 338 iic_release_bus(sc->sc_tag, 0); 339 aprint_error_dev(self, "error %d writing config register\n", 340 error); 341 return; 342 } 343 iic_release_bus(sc->sc_tag, 0); 344 345 /* Hook us into the sysmon_envsys subsystem */ 346 sc->sc_sme = sysmon_envsys_create(); 347 sc->sc_sme->sme_name = device_xname(self); 348 sc->sc_sme->sme_cookie = sc; 349 sc->sc_sme->sme_refresh = sdtemp_refresh; 350 sc->sc_sme->sme_get_limits = sdtemp_get_limits; 351 sc->sc_sme->sme_set_limits = sdtemp_set_limits; 352 353 sc->sc_sensor = kmem_zalloc(sizeof(envsys_data_t), KM_SLEEP); 354 355 /* Initialize sensor data. */ 356 sc->sc_sensor->units = ENVSYS_STEMP; 357 sc->sc_sensor->state = ENVSYS_SINVALID; 358 sc->sc_sensor->flags |= ENVSYS_FMONLIMITS; 359 (void)strlcpy(sc->sc_sensor->desc, device_xname(self), 360 sizeof(sc->sc_sensor->desc)); 361 snprintf(sc->sc_sensor->desc, sizeof(sc->sc_sensor->desc), 362 "DIMM %d temperature", sc->sc_address - SDTEMP_ADDR); 363 364 /* Now attach the sensor */ 365 if (sysmon_envsys_sensor_attach(sc->sc_sme, sc->sc_sensor)) { 366 aprint_error_dev(self, "unable to attach sensor\n"); 367 goto bad; 368 } 369 370 /* Register the device */ 371 error = sysmon_envsys_register(sc->sc_sme); 372 if (error) { 373 aprint_error_dev(self, "error %d registering with sysmon\n", 374 error); 375 goto bad; 376 } 377 378 if (!pmf_device_register(self, sdtemp_pmf_suspend, sdtemp_pmf_resume)) 379 aprint_error_dev(self, "couldn't establish power handler\n"); 380 381 /* Retrieve and display hardware monitor limits */ 382 sdtemp_get_limits(sc->sc_sme, sc->sc_sensor, &sc->sc_deflims, 383 &sc->sc_defprops); 384 aprint_normal_dev(self, "Hardware limits: "); 385 i = 0; 386 if (sc->sc_defprops & PROP_WARNMIN) { 387 aprint_normal("low %dC", 388 __UK2C(sc->sc_deflims.sel_warnmin)); 389 i++; 390 } 391 if (sc->sc_defprops & PROP_WARNMAX) { 392 aprint_normal("%shigh %dC ", (i)?", ":"", 393 __UK2C(sc->sc_deflims.sel_warnmax)); 394 i++; 395 } 396 if (sc->sc_defprops & PROP_CRITMAX) { 397 aprint_normal("%scritical %dC ", (i)?", ":"", 398 __UK2C(sc->sc_deflims.sel_critmax)); 399 i++; 400 } 401 aprint_normal("%s\n", (i)?"":"none set"); 402 403 return; 404 405 bad: 406 kmem_free(sc->sc_sensor, sizeof(envsys_data_t)); 407 sysmon_envsys_destroy(sc->sc_sme); 408 sc->sc_sme = NULL; 409 } 410 411 static int 412 sdtemp_detach(device_t self, int flags) 413 { 414 struct sdtemp_softc *sc = device_private(self); 415 416 pmf_device_deregister(self); 417 418 if (sc->sc_sme) 419 sysmon_envsys_unregister(sc->sc_sme); 420 if (sc->sc_sensor) 421 kmem_free(sc->sc_sensor, sizeof(envsys_data_t)); 422 423 return 0; 424 } 425 426 /* Retrieve current limits from device, and encode in uKelvins */ 427 static void 428 sdtemp_get_limits(struct sysmon_envsys *sme, envsys_data_t *edata, 429 sysmon_envsys_lim_t *limits, uint32_t *props) 430 { 431 struct sdtemp_softc *sc = sme->sme_cookie; 432 uint16_t lim; 433 434 *props = 0; 435 if (iic_acquire_bus(sc->sc_tag, 0) != 0) 436 return; 437 438 if (sdtemp_read_16(sc, SDTEMP_REG_LOWER_LIM, &lim) == 0 && lim != 0) { 439 limits->sel_warnmin = sdtemp_decode_temp(sc, lim); 440 *props |= PROP_WARNMIN; 441 } 442 if (sdtemp_read_16(sc, SDTEMP_REG_UPPER_LIM, &lim) == 0 && lim != 0) { 443 limits->sel_warnmax = sdtemp_decode_temp(sc, lim); 444 *props |= PROP_WARNMAX; 445 } 446 if (sdtemp_read_16(sc, SDTEMP_REG_CRIT_LIM, &lim) == 0 && lim != 0) { 447 limits->sel_critmax = sdtemp_decode_temp(sc, lim); 448 *props |= PROP_CRITMAX; 449 } 450 iic_release_bus(sc->sc_tag, 0); 451 if (*props != 0) 452 *props |= PROP_DRIVER_LIMITS; 453 } 454 455 /* Send current limit values to the device */ 456 static void 457 sdtemp_set_limits(struct sysmon_envsys *sme, envsys_data_t *edata, 458 sysmon_envsys_lim_t *limits, uint32_t *props) 459 { 460 uint16_t val; 461 struct sdtemp_softc *sc = sme->sme_cookie; 462 463 if (limits == NULL) { 464 limits = &sc->sc_deflims; 465 props = &sc->sc_defprops; 466 } 467 if (iic_acquire_bus(sc->sc_tag, 0) != 0) 468 return; 469 470 if (*props & PROP_WARNMIN) { 471 val = __UK2C(limits->sel_warnmin); 472 (void)sdtemp_write_16(sc, SDTEMP_REG_LOWER_LIM, 473 (val << 4) & SDTEMP_TEMP_MASK); 474 } 475 if (*props & PROP_WARNMAX) { 476 val = __UK2C(limits->sel_warnmax); 477 (void)sdtemp_write_16(sc, SDTEMP_REG_UPPER_LIM, 478 (val << 4) & SDTEMP_TEMP_MASK); 479 } 480 if (*props & PROP_CRITMAX) { 481 val = __UK2C(limits->sel_critmax); 482 (void)sdtemp_write_16(sc, SDTEMP_REG_CRIT_LIM, 483 (val << 4) & SDTEMP_TEMP_MASK); 484 } 485 iic_release_bus(sc->sc_tag, 0); 486 487 /* 488 * If at least one limit is set that we can handle, and no 489 * limits are set that we cannot handle, tell sysmon that 490 * the driver will take care of monitoring the limits! 491 */ 492 if (*props & (PROP_CRITMIN | PROP_BATTCAP | PROP_BATTWARN)) 493 *props &= ~PROP_DRIVER_LIMITS; 494 else if (*props & PROP_LIMITS) 495 *props |= PROP_DRIVER_LIMITS; 496 else 497 *props &= ~PROP_DRIVER_LIMITS; 498 } 499 500 #ifdef NOT_YET /* All registers on these sensors are 16-bits */ 501 502 /* Read a 8-bit value from a register */ 503 static int 504 sdtemp_read_8(struct sdtemp_softc *sc, uint8_t reg, uint8_t *valp) 505 { 506 int error; 507 508 error = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 509 sc->sc_address, ®, 1, valp, sizeof(*valp), 0); 510 511 return error; 512 } 513 514 static int 515 sdtemp_write_8(struct sdtemp_softc *sc, uint8_t reg, uint8_t val) 516 { 517 return iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, 518 sc->sc_address, ®, 1, &val, sizeof(val), 0); 519 } 520 #endif /* NOT_YET */ 521 522 /* Read a 16-bit value from a register */ 523 static int 524 sdtemp_read_16(struct sdtemp_softc *sc, uint8_t reg, uint16_t *valp) 525 { 526 int error; 527 528 error = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 529 sc->sc_address, ®, 1, valp, sizeof(*valp), 0); 530 if (error) 531 return error; 532 533 *valp = be16toh(*valp); 534 535 return 0; 536 } 537 538 static int 539 sdtemp_write_16(struct sdtemp_softc *sc, uint8_t reg, uint16_t val) 540 { 541 uint16_t temp; 542 543 temp = htobe16(val); 544 return iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, 545 sc->sc_address, ®, 1, &temp, sizeof(temp), 0); 546 } 547 548 static uint32_t 549 sdtemp_decode_temp(struct sdtemp_softc *sc, uint16_t temp) 550 { 551 uint32_t val; 552 int32_t stemp; 553 554 /* Get only the temperature bits */ 555 temp &= SDTEMP_TEMP_MASK; 556 557 /* If necessary, extend the sign bit */ 558 if ((sc->sc_capability & SDTEMP_CAP_WIDER_RANGE) && 559 (temp & SDTEMP_TEMP_NEGATIVE)) 560 temp |= SDTEMP_TEMP_SIGN_EXT; 561 562 /* Mask off only bits valid within current resolution */ 563 temp &= ~(0x7 >> sc->sc_resolution); 564 565 /* Treat as signed and extend to 32-bits */ 566 stemp = (int16_t)temp; 567 568 /* Now convert from 0.0625 (1/16) deg C increments to microKelvins */ 569 val = (stemp * 62500) + 273150000; 570 571 return val; 572 } 573 574 static void 575 sdtemp_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 576 { 577 struct sdtemp_softc *sc = sme->sme_cookie; 578 uint16_t val; 579 int error; 580 581 error = iic_acquire_bus(sc->sc_tag, 0); 582 if (error) { 583 edata->state = ENVSYS_SINVALID; 584 return; 585 } 586 587 error = sdtemp_read_16(sc, SDTEMP_REG_AMBIENT_TEMP, &val); 588 iic_release_bus(sc->sc_tag, 0); 589 590 if (error) { 591 edata->state = ENVSYS_SINVALID; 592 return; 593 } 594 595 edata->value_cur = sdtemp_decode_temp(sc, val); 596 597 /* Now check for limits */ 598 if ((edata->upropset & PROP_DRIVER_LIMITS) == 0) 599 edata->state = ENVSYS_SVALID; 600 else if ((val & SDTEMP_ABOVE_CRIT) && 601 (edata->upropset & PROP_CRITMAX)) 602 edata->state = ENVSYS_SCRITOVER; 603 else if ((val & SDTEMP_ABOVE_UPPER) && 604 (edata->upropset & PROP_WARNMAX)) 605 edata->state = ENVSYS_SWARNOVER; 606 else if ((val & SDTEMP_BELOW_LOWER) && 607 (edata->upropset & PROP_WARNMIN)) 608 edata->state = ENVSYS_SWARNUNDER; 609 else 610 edata->state = ENVSYS_SVALID; 611 } 612 613 /* 614 * Power management functions 615 * 616 * We go into "shutdown" mode at suspend time, and return to normal 617 * mode upon resume. This reduces power consumption by disabling 618 * the A/D converter. 619 */ 620 621 static bool 622 sdtemp_pmf_suspend(device_t dev, const pmf_qual_t *qual) 623 { 624 struct sdtemp_softc *sc = device_private(dev); 625 int error; 626 uint16_t config; 627 628 error = iic_acquire_bus(sc->sc_tag, 0); 629 if (error != 0) 630 return false; 631 632 error = sdtemp_read_16(sc, SDTEMP_REG_CONFIG, &config); 633 if (error == 0) { 634 config |= SDTEMP_CONFIG_SHUTDOWN_MODE; 635 error = sdtemp_write_16(sc, SDTEMP_REG_CONFIG, config); 636 } 637 iic_release_bus(sc->sc_tag, 0); 638 return (error == 0); 639 } 640 641 static bool 642 sdtemp_pmf_resume(device_t dev, const pmf_qual_t *qual) 643 { 644 struct sdtemp_softc *sc = device_private(dev); 645 int error; 646 uint16_t config; 647 648 error = iic_acquire_bus(sc->sc_tag, 0); 649 if (error != 0) 650 return false; 651 652 error = sdtemp_read_16(sc, SDTEMP_REG_CONFIG, &config); 653 if (error == 0) { 654 config &= ~SDTEMP_CONFIG_SHUTDOWN_MODE; 655 error = sdtemp_write_16(sc, SDTEMP_REG_CONFIG, config); 656 } 657 iic_release_bus(sc->sc_tag, 0); 658 return (error == 0); 659 } 660 661 /* Device dependent config functions */ 662 663 static void 664 sdtemp_config_mcp(struct sdtemp_softc *sc) 665 { 666 int rv; 667 uint8_t resolreg; 668 669 /* Note that MCP9805 has no resolution register */ 670 switch (sc->sc_devid_masked) { 671 case MCP_9804_DEVICE_ID: 672 case MCP_98242_DEVICE_ID: 673 case MCP_98243_DEVICE_ID: 674 resolreg = SDTEMP_REG_MCP_RESOLUTION_9804; 675 break; 676 case MCP_98244_DEVICE_ID: 677 resolreg = SDTEMP_REG_MCP_RESOLUTION_98244; 678 break; 679 default: 680 aprint_error("%s: %s: unknown device ID (%04hx)\n", 681 device_xname(sc->sc_dev), __func__, sc->sc_devid_masked); 682 return; 683 } 684 685 /* 686 * Set resolution to the max. 687 * 688 * Even if it fails, the resolution will be the default. It's not a 689 * fatal error. 690 */ 691 rv = sdtemp_write_16(sc, resolreg, SDTEMP_CAP_RESOLUTION_MAX); 692 if (rv == 0) 693 sc->sc_resolution = SDTEMP_CAP_RESOLUTION_MAX; 694 else 695 aprint_error("%s: error %d writing resolution register\n", 696 device_xname(sc->sc_dev), rv); 697 } 698 699 static void 700 sdtemp_config_idt(struct sdtemp_softc *sc) 701 { 702 int rv; 703 704 /* 705 * Set resolution to the max. 706 * 707 * Even if it fails, the resolution will be the default. It's not a 708 * fatal error. 709 */ 710 rv = sdtemp_write_16(sc, SDTEMP_REG_IDT_RESOLUTION, 711 __SHIFTIN(SDTEMP_CAP_RESOLUTION_MAX, SDTEMP_CAP_RESOLUTION)); 712 if (rv == 0) 713 sc->sc_resolution = SDTEMP_CAP_RESOLUTION_MAX; 714 else 715 aprint_error("%s: error %d writing resolution register\n", 716 device_xname(sc->sc_dev), rv); 717 } 718 719 MODULE(MODULE_CLASS_DRIVER, sdtemp, "i2cexec,sysmon_envsys"); 720 721 #ifdef _MODULE 722 #include "ioconf.c" 723 #endif 724 725 static int 726 sdtemp_modcmd(modcmd_t cmd, void *opaque) 727 { 728 int error = 0; 729 730 switch (cmd) { 731 case MODULE_CMD_INIT: 732 #ifdef _MODULE 733 error = config_init_component(cfdriver_ioconf_sdtemp, 734 cfattach_ioconf_sdtemp, cfdata_ioconf_sdtemp); 735 #endif 736 return error; 737 case MODULE_CMD_FINI: 738 #ifdef _MODULE 739 error = config_fini_component(cfdriver_ioconf_sdtemp, 740 cfattach_ioconf_sdtemp, cfdata_ioconf_sdtemp); 741 #endif 742 return error; 743 default: 744 return ENOTTY; 745 } 746 } 747
Indexes created Thu Sep 25 16:09:42 GMT 2025