sdtemp.c revision 1.21.6.2
1 /* $NetBSD: sdtemp.c,v 1.21.6.2 2017/12/03 11:37:02 jdolecek 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 1.21.6.2 2017/12/03 11:37:02 jdolecek 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 { MCP_MANUFACTURER_ID, MCP_9804_DEVICE_ID, MCP_9804_MASK, CMCP, 119 "Microchip Tech MCP9804" }, 120 { MCP_MANUFACTURER_ID, MCP_9805_DEVICE_ID, MCP_9805_MASK, NULL, 121 "Microchip Tech MCP9805/MCP9843" }, 122 { MCP_MANUFACTURER_ID, MCP_98242_DEVICE_ID, MCP_98242_MASK, CMCP, 123 "Microchip Tech MCP98242" }, 124 { MCP_MANUFACTURER_ID, MCP_98243_DEVICE_ID, MCP_98243_MASK, CMCP, 125 "Microchip Tech MCP98243" }, 126 { MCP_MANUFACTURER_ID, MCP_98244_DEVICE_ID, MCP_98244_MASK, CMCP, 127 "Microchip Tech MCP98244" }, 128 { ADT_MANUFACTURER_ID, ADT_7408_DEVICE_ID, ADT_7408_MASK, NULL, 129 "Analog Devices ADT7408" }, 130 { NXP_MANUFACTURER_ID, NXP_SE98_DEVICE_ID, NXP_SE98_MASK, NULL, 131 "NXP Semiconductors SE97B/SE98" }, 132 { NXP_MANUFACTURER_ID, NXP_SE97_DEVICE_ID, NXP_SE97_MASK, NULL, 133 "NXP Semiconductors SE97" }, 134 { STTS_MANUFACTURER_ID, STTS_424E_DEVICE_ID, STTS_424E_MASK, NULL, 135 "STmicroelectronics STTS424E" }, 136 { STTS_MANUFACTURER_ID, STTS_424_DEVICE_ID, STTS_424_MASK, NULL, 137 "STmicroelectronics STTS424" }, 138 { STTS_MANUFACTURER_ID, STTS_2002_DEVICE_ID, STTS_2002_MASK, NULL, 139 "STmicroelectronics STTS2002" }, 140 { STTS_MANUFACTURER_ID, STTS_2004_DEVICE_ID, STTS_2004_MASK, NULL, 141 "STmicroelectronics STTS2004" }, 142 { STTS_MANUFACTURER_ID, STTS_3000_DEVICE_ID, STTS_3000_MASK, NULL, 143 "STmicroelectronics STTS3000" }, 144 { CAT_MANUFACTURER_ID, CAT_34TS02_DEVICE_ID, CAT_34TS02_MASK, NULL, 145 "Catalyst CAT34TS02/CAT6095" }, 146 { CAT_MANUFACTURER_ID, CAT_34TS02C_DEVICE_ID, CAT_34TS02C_MASK, NULL, 147 "Catalyst CAT34TS02C" }, 148 { CAT_MANUFACTURER_ID, CAT_34TS04_DEVICE_ID, CAT_34TS04_MASK, NULL, 149 "Catalyst CAT34TS04" }, 150 { IDT_MANUFACTURER_ID, IDT_TSE2004GB2_DEVICE_ID,IDT_TSE2004GB2_MASK, NULL, 151 "Integrated Device Technology TSE2004GB2" }, 152 { IDT_MANUFACTURER_ID, IDT_TS3000B3_DEVICE_ID, IDT_TS3000B3_MASK, CIDT, 153 "Integrated Device Technology TS3000B3/TSE2002B3" }, 154 { IDT_MANUFACTURER_ID, IDT_TS3000GB0_DEVICE_ID, IDT_TS3000GB0_MASK, CIDT, 155 "Integrated Device Technology TS3000GB0" }, 156 { IDT_MANUFACTURER_ID, IDT_TS3000GB2_DEVICE_ID, IDT_TS3000GB2_MASK, CIDT, 157 "Integrated Device Technology TS3000GB2" }, 158 { IDT_MANUFACTURER_ID, IDT_TS3001GB2_DEVICE_ID, IDT_TS3001GB2_MASK, CIDT, 159 "Integrated Device Technology TS3001GB2" }, 160 /* 161 * Don't change the location of the following two entries. Device specific 162 * entry must be located at above. 163 */ 164 { 0, TSE2004AV_ID, TSE2004AV_MASK, NULL, 165 "TSE2004av compliant device (generic driver)" }, 166 { 0, 0, 0, NULL, "Unknown" } 167 }; 168 169 #undef CMCP 170 #undef CIDT 171 172 static const char *temp_resl[] = { 173 "0.5C", 174 "0.25C", 175 "0.125C", 176 "0.0625C" 177 }; 178 179 static int 180 sdtemp_lookup(uint16_t mfg, uint16_t devrev) 181 { 182 int i; 183 184 for (i = 0; sdtemp_dev_table[i].sdtemp_mfg_id; i++) { 185 if (mfg != sdtemp_dev_table[i].sdtemp_mfg_id) 186 continue; 187 if ((devrev & sdtemp_dev_table[i].sdtemp_mask) == 188 sdtemp_dev_table[i].sdtemp_devrev) 189 break; 190 } 191 /* Check TSE2004av */ 192 if ((sdtemp_dev_table[i].sdtemp_mfg_id == 0) 193 && (SDTEMP_IS_TSE2004AV(devrev) == 0)) 194 i++; /* Unknown */ 195 196 return i; 197 } 198 199 static int 200 sdtemp_match(device_t parent, cfdata_t cf, void *aux) 201 { 202 struct i2c_attach_args *ia = aux; 203 uint16_t mfgid, devid, cap; 204 struct sdtemp_softc sc; 205 int i, error; 206 207 sc.sc_tag = ia->ia_tag; 208 sc.sc_address = ia->ia_addr; 209 210 if ((ia->ia_addr & SDTEMP_ADDRMASK) != SDTEMP_ADDR) 211 return 0; 212 213 /* Verify that we can read the manufacturer ID, Device ID and the capability */ 214 iic_acquire_bus(sc.sc_tag, 0); 215 error = sdtemp_read_16(&sc, SDTEMP_REG_MFG_ID, &mfgid) | 216 sdtemp_read_16(&sc, SDTEMP_REG_DEV_REV, &devid) | 217 sdtemp_read_16(&sc, SDTEMP_REG_CAPABILITY, &cap); 218 iic_release_bus(sc.sc_tag, 0); 219 220 if (error) 221 return 0; 222 223 i = sdtemp_lookup(mfgid, devid); 224 if ((sdtemp_dev_table[i].sdtemp_mfg_id == 0) && 225 (sdtemp_dev_table[i].sdtemp_devrev == 0)) { 226 aprint_debug("sdtemp: No match for mfg 0x%04x dev 0x%02x " 227 "rev 0x%02x at address 0x%02x\n", mfgid, devid >> 8, 228 devid & 0xff, sc.sc_address); 229 return 0; 230 } 231 232 /* 233 * Check by SDTEMP_IS_TSE2004AV() might not be enough, so check the alarm 234 * capability, too. 235 */ 236 if ((cap & SDTEMP_CAP_HAS_ALARM) == 0) 237 return 0; 238 239 return 1; 240 } 241 242 static void 243 sdtemp_attach(device_t parent, device_t self, void *aux) 244 { 245 struct sdtemp_softc *sc = device_private(self); 246 struct i2c_attach_args *ia = aux; 247 uint16_t mfgid, devid; 248 int i, error; 249 250 sc->sc_tag = ia->ia_tag; 251 sc->sc_address = ia->ia_addr; 252 sc->sc_dev = self; 253 254 iic_acquire_bus(sc->sc_tag, 0); 255 if ((error = sdtemp_read_16(sc, SDTEMP_REG_MFG_ID, &mfgid)) != 0 || 256 (error = sdtemp_read_16(sc, SDTEMP_REG_DEV_REV, &devid)) != 0) { 257 iic_release_bus(sc->sc_tag, 0); 258 aprint_error(": attach error %d\n", error); 259 return; 260 } 261 sc->sc_mfgid = mfgid; 262 sc->sc_devid = devid; 263 i = sdtemp_lookup(mfgid, devid); 264 sc->sc_devid_masked = devid & sdtemp_dev_table[i].sdtemp_mask; 265 266 aprint_naive(": Temp Sensor\n"); 267 aprint_normal(": %s Temp Sensor\n", sdtemp_dev_table[i].sdtemp_desc); 268 269 if (sdtemp_dev_table[i].sdtemp_mfg_id == 0) { 270 if (SDTEMP_IS_TSE2004AV(devid)) 271 aprint_normal_dev(self, "TSE2004av compliant. " 272 "Manufacturer ID 0x%04hx, Device revision 0x%02x\n", 273 mfgid, devid & TSE2004AV_REV); 274 else { 275 aprint_error_dev(self, 276 "mfg 0x%04x dev 0x%02x rev 0x%02x at addr 0x%02x\n", 277 mfgid, devid >> 8, devid & 0xff, ia->ia_addr); 278 iic_release_bus(sc->sc_tag, 0); 279 aprint_error_dev(self, "It should no happen. " 280 "Why attach() found me?\n"); 281 return; 282 } 283 } 284 285 error = sdtemp_read_16(sc, SDTEMP_REG_CAPABILITY, &sc->sc_capability); 286 aprint_debug_dev(self, "capability reg = %04x\n", sc->sc_capability); 287 sc->sc_resolution 288 = __SHIFTOUT(sc->sc_capability, SDTEMP_CAP_RESOLUTION); 289 /* 290 * Call device dependent function here. Currently, it's used for 291 * the resolution. 292 * 293 * IDT's devices and some Microchip's devices have the resolution 294 * register in the vendor specific registers area. The devices' 295 * resolution bits in the capability register are not the maximum 296 * resolution but the current vaule of the setting. 297 */ 298 if (sdtemp_dev_table[i].sdtemp_config != NULL) 299 sdtemp_dev_table[i].sdtemp_config(sc); 300 301 aprint_normal_dev(self, "%s accuracy", 302 (sc->sc_capability & SDTEMP_CAP_ACCURACY_1C) ? "high" : "default"); 303 if ((sc->sc_capability & SDTEMP_CAP_WIDER_RANGE) != 0) 304 aprint_normal(", wider range"); 305 aprint_normal(", %s resolution", temp_resl[sc->sc_resolution]); 306 if ((sc->sc_capability & SDTEMP_CAP_VHV) != 0) 307 aprint_debug(", high voltage standoff"); 308 aprint_debug(", %s timeout", 309 (sc->sc_capability & SDTEMP_CAP_TMOUT) ? "25-35ms" : "10-60ms"); 310 if ((sc->sc_capability & SDTEMP_CAP_EVSD) != 0) 311 aprint_normal(", event with shutdown"); 312 aprint_normal("\n"); 313 /* 314 * Alarm capability is required; if not present, this is likely 315 * not a real sdtemp device. 316 */ 317 if (error != 0 || (sc->sc_capability & SDTEMP_CAP_HAS_ALARM) == 0) { 318 iic_release_bus(sc->sc_tag, 0); 319 aprint_error_dev(self, 320 "required alarm capability not present!\n"); 321 return; 322 } 323 /* Set the configuration to defaults. */ 324 error = sdtemp_write_16(sc, SDTEMP_REG_CONFIG, 0); 325 if (error != 0) { 326 iic_release_bus(sc->sc_tag, 0); 327 aprint_error_dev(self, "error %d writing config register\n", 328 error); 329 return; 330 } 331 iic_release_bus(sc->sc_tag, 0); 332 333 /* Hook us into the sysmon_envsys subsystem */ 334 sc->sc_sme = sysmon_envsys_create(); 335 sc->sc_sme->sme_name = device_xname(self); 336 sc->sc_sme->sme_cookie = sc; 337 sc->sc_sme->sme_refresh = sdtemp_refresh; 338 sc->sc_sme->sme_get_limits = sdtemp_get_limits; 339 sc->sc_sme->sme_set_limits = sdtemp_set_limits; 340 341 sc->sc_sensor = kmem_zalloc(sizeof(envsys_data_t), KM_NOSLEEP); 342 if (!sc->sc_sensor) { 343 aprint_error_dev(self, "unable to allocate sc_sensor\n"); 344 goto bad2; 345 } 346 347 /* Initialize sensor data. */ 348 sc->sc_sensor->units = ENVSYS_STEMP; 349 sc->sc_sensor->state = ENVSYS_SINVALID; 350 sc->sc_sensor->flags |= ENVSYS_FMONLIMITS; 351 (void)strlcpy(sc->sc_sensor->desc, device_xname(self), 352 sizeof(sc->sc_sensor->desc)); 353 snprintf(sc->sc_sensor->desc, sizeof(sc->sc_sensor->desc), 354 "DIMM %d temperature", sc->sc_address - SDTEMP_ADDR); 355 356 /* Now attach the sensor */ 357 if (sysmon_envsys_sensor_attach(sc->sc_sme, sc->sc_sensor)) { 358 aprint_error_dev(self, "unable to attach sensor\n"); 359 goto bad; 360 } 361 362 /* Register the device */ 363 error = sysmon_envsys_register(sc->sc_sme); 364 if (error) { 365 aprint_error_dev(self, "error %d registering with sysmon\n", 366 error); 367 goto bad; 368 } 369 370 if (!pmf_device_register(self, sdtemp_pmf_suspend, sdtemp_pmf_resume)) 371 aprint_error_dev(self, "couldn't establish power handler\n"); 372 373 /* Retrieve and display hardware monitor limits */ 374 sdtemp_get_limits(sc->sc_sme, sc->sc_sensor, &sc->sc_deflims, 375 &sc->sc_defprops); 376 aprint_normal_dev(self, "Hardware limits: "); 377 i = 0; 378 if (sc->sc_defprops & PROP_WARNMIN) { 379 aprint_normal("low %dC", 380 __UK2C(sc->sc_deflims.sel_warnmin)); 381 i++; 382 } 383 if (sc->sc_defprops & PROP_WARNMAX) { 384 aprint_normal("%shigh %dC ", (i)?", ":"", 385 __UK2C(sc->sc_deflims.sel_warnmax)); 386 i++; 387 } 388 if (sc->sc_defprops & PROP_CRITMAX) { 389 aprint_normal("%scritical %dC ", (i)?", ":"", 390 __UK2C(sc->sc_deflims.sel_critmax)); 391 i++; 392 } 393 aprint_normal("%s\n", (i)?"":"none set"); 394 395 return; 396 397 bad: 398 kmem_free(sc->sc_sensor, sizeof(envsys_data_t)); 399 bad2: 400 sysmon_envsys_destroy(sc->sc_sme); 401 } 402 403 static int 404 sdtemp_detach(device_t self, int flags) 405 { 406 struct sdtemp_softc *sc = device_private(self); 407 408 pmf_device_deregister(self); 409 410 if (sc->sc_sme) 411 sysmon_envsys_unregister(sc->sc_sme); 412 if (sc->sc_sensor) 413 kmem_free(sc->sc_sensor, sizeof(envsys_data_t)); 414 415 return 0; 416 } 417 418 /* Retrieve current limits from device, and encode in uKelvins */ 419 static void 420 sdtemp_get_limits(struct sysmon_envsys *sme, envsys_data_t *edata, 421 sysmon_envsys_lim_t *limits, uint32_t *props) 422 { 423 struct sdtemp_softc *sc = sme->sme_cookie; 424 uint16_t lim; 425 426 *props = 0; 427 iic_acquire_bus(sc->sc_tag, 0); 428 if (sdtemp_read_16(sc, SDTEMP_REG_LOWER_LIM, &lim) == 0 && lim != 0) { 429 limits->sel_warnmin = sdtemp_decode_temp(sc, lim); 430 *props |= PROP_WARNMIN; 431 } 432 if (sdtemp_read_16(sc, SDTEMP_REG_UPPER_LIM, &lim) == 0 && lim != 0) { 433 limits->sel_warnmax = sdtemp_decode_temp(sc, lim); 434 *props |= PROP_WARNMAX; 435 } 436 if (sdtemp_read_16(sc, SDTEMP_REG_CRIT_LIM, &lim) == 0 && lim != 0) { 437 limits->sel_critmax = sdtemp_decode_temp(sc, lim); 438 *props |= PROP_CRITMAX; 439 } 440 iic_release_bus(sc->sc_tag, 0); 441 if (*props != 0) 442 *props |= PROP_DRIVER_LIMITS; 443 } 444 445 /* Send current limit values to the device */ 446 static void 447 sdtemp_set_limits(struct sysmon_envsys *sme, envsys_data_t *edata, 448 sysmon_envsys_lim_t *limits, uint32_t *props) 449 { 450 uint16_t val; 451 struct sdtemp_softc *sc = sme->sme_cookie; 452 453 if (limits == NULL) { 454 limits = &sc->sc_deflims; 455 props = &sc->sc_defprops; 456 } 457 iic_acquire_bus(sc->sc_tag, 0); 458 if (*props & PROP_WARNMIN) { 459 val = __UK2C(limits->sel_warnmin); 460 (void)sdtemp_write_16(sc, SDTEMP_REG_LOWER_LIM, 461 (val << 4) & SDTEMP_TEMP_MASK); 462 } 463 if (*props & PROP_WARNMAX) { 464 val = __UK2C(limits->sel_warnmax); 465 (void)sdtemp_write_16(sc, SDTEMP_REG_UPPER_LIM, 466 (val << 4) & SDTEMP_TEMP_MASK); 467 } 468 if (*props & PROP_CRITMAX) { 469 val = __UK2C(limits->sel_critmax); 470 (void)sdtemp_write_16(sc, SDTEMP_REG_CRIT_LIM, 471 (val << 4) & SDTEMP_TEMP_MASK); 472 } 473 iic_release_bus(sc->sc_tag, 0); 474 475 /* 476 * If at least one limit is set that we can handle, and no 477 * limits are set that we cannot handle, tell sysmon that 478 * the driver will take care of monitoring the limits! 479 */ 480 if (*props & (PROP_CRITMIN | PROP_BATTCAP | PROP_BATTWARN)) 481 *props &= ~PROP_DRIVER_LIMITS; 482 else if (*props & PROP_LIMITS) 483 *props |= PROP_DRIVER_LIMITS; 484 else 485 *props &= ~PROP_DRIVER_LIMITS; 486 } 487 488 #ifdef NOT_YET /* All registers on these sensors are 16-bits */ 489 490 /* Read a 8-bit value from a register */ 491 static int 492 sdtemp_read_8(struct sdtemp_softc *sc, uint8_t reg, uint8_t *valp) 493 { 494 int error; 495 496 error = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 497 sc->sc_address, ®, 1, valp, sizeof(*valp), 0); 498 499 return error; 500 } 501 502 static int 503 sdtemp_write_8(struct sdtemp_softc *sc, uint8_t reg, uint8_t val) 504 { 505 return iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, 506 sc->sc_address, ®, 1, &val, sizeof(val), 0); 507 } 508 #endif /* NOT_YET */ 509 510 /* Read a 16-bit value from a register */ 511 static int 512 sdtemp_read_16(struct sdtemp_softc *sc, uint8_t reg, uint16_t *valp) 513 { 514 int error; 515 516 error = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 517 sc->sc_address, ®, 1, valp, sizeof(*valp), 0); 518 if (error) 519 return error; 520 521 *valp = be16toh(*valp); 522 523 return 0; 524 } 525 526 static int 527 sdtemp_write_16(struct sdtemp_softc *sc, uint8_t reg, uint16_t val) 528 { 529 uint16_t temp; 530 531 temp = htobe16(val); 532 return iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, 533 sc->sc_address, ®, 1, &temp, sizeof(temp), 0); 534 } 535 536 static uint32_t 537 sdtemp_decode_temp(struct sdtemp_softc *sc, uint16_t temp) 538 { 539 uint32_t val; 540 int32_t stemp; 541 542 /* Get only the temperature bits */ 543 temp &= SDTEMP_TEMP_MASK; 544 545 /* If necessary, extend the sign bit */ 546 if ((sc->sc_capability & SDTEMP_CAP_WIDER_RANGE) && 547 (temp & SDTEMP_TEMP_NEGATIVE)) 548 temp |= SDTEMP_TEMP_SIGN_EXT; 549 550 /* Mask off only bits valid within current resolution */ 551 temp &= ~(0x7 >> sc->sc_resolution); 552 553 /* Treat as signed and extend to 32-bits */ 554 stemp = (int16_t)temp; 555 556 /* Now convert from 0.0625 (1/16) deg C increments to microKelvins */ 557 val = (stemp * 62500) + 273150000; 558 559 return val; 560 } 561 562 static void 563 sdtemp_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 564 { 565 struct sdtemp_softc *sc = sme->sme_cookie; 566 uint16_t val; 567 int error; 568 569 iic_acquire_bus(sc->sc_tag, 0); 570 error = sdtemp_read_16(sc, SDTEMP_REG_AMBIENT_TEMP, &val); 571 iic_release_bus(sc->sc_tag, 0); 572 573 if (error) { 574 edata->state = ENVSYS_SINVALID; 575 return; 576 } 577 578 edata->value_cur = sdtemp_decode_temp(sc, val); 579 580 /* Now check for limits */ 581 if ((edata->upropset & PROP_DRIVER_LIMITS) == 0) 582 edata->state = ENVSYS_SVALID; 583 else if ((val & SDTEMP_ABOVE_CRIT) && 584 (edata->upropset & PROP_CRITMAX)) 585 edata->state = ENVSYS_SCRITOVER; 586 else if ((val & SDTEMP_ABOVE_UPPER) && 587 (edata->upropset & PROP_WARNMAX)) 588 edata->state = ENVSYS_SWARNOVER; 589 else if ((val & SDTEMP_BELOW_LOWER) && 590 (edata->upropset & PROP_WARNMIN)) 591 edata->state = ENVSYS_SWARNUNDER; 592 else 593 edata->state = ENVSYS_SVALID; 594 } 595 596 /* 597 * power management functions 598 * 599 * We go into "shutdown" mode at suspend time, and return to normal 600 * mode upon resume. This reduces power consumption by disabling 601 * the A/D converter. 602 */ 603 604 static bool 605 sdtemp_pmf_suspend(device_t dev, const pmf_qual_t *qual) 606 { 607 struct sdtemp_softc *sc = device_private(dev); 608 int error; 609 uint16_t config; 610 611 iic_acquire_bus(sc->sc_tag, 0); 612 error = sdtemp_read_16(sc, SDTEMP_REG_CONFIG, &config); 613 if (error == 0) { 614 config |= SDTEMP_CONFIG_SHUTDOWN_MODE; 615 error = sdtemp_write_16(sc, SDTEMP_REG_CONFIG, config); 616 } 617 iic_release_bus(sc->sc_tag, 0); 618 return (error == 0); 619 } 620 621 static bool 622 sdtemp_pmf_resume(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 iic_acquire_bus(sc->sc_tag, 0); 629 error = sdtemp_read_16(sc, SDTEMP_REG_CONFIG, &config); 630 if (error == 0) { 631 config &= ~SDTEMP_CONFIG_SHUTDOWN_MODE; 632 error = sdtemp_write_16(sc, SDTEMP_REG_CONFIG, config); 633 } 634 iic_release_bus(sc->sc_tag, 0); 635 return (error == 0); 636 } 637 638 /* Device dependent config functions */ 639 640 static void 641 sdtemp_config_mcp(struct sdtemp_softc *sc) 642 { 643 int rv; 644 uint8_t resolreg; 645 646 /* Note that MCP9805 has no resolution register */ 647 switch (sc->sc_devid_masked) { 648 case MCP_9804_DEVICE_ID: 649 case MCP_98242_DEVICE_ID: 650 case MCP_98243_DEVICE_ID: 651 resolreg = SDTEMP_REG_MCP_RESOLUTION_9804; 652 break; 653 case MCP_98244_DEVICE_ID: 654 resolreg = SDTEMP_REG_MCP_RESOLUTION_98244; 655 break; 656 default: 657 aprint_error("%s: %s: unknown device ID (%04hx)\n", 658 device_xname(sc->sc_dev), __func__, sc->sc_devid_masked); 659 return; 660 } 661 662 /* 663 * Set resolution to the max. 664 * 665 * Even if it fails, the resolution will be the default. It's not a 666 * fatal error. 667 */ 668 rv = sdtemp_write_16(sc, resolreg, SDTEMP_CAP_RESOLUTION_MAX); 669 if (rv == 0) 670 sc->sc_resolution = SDTEMP_CAP_RESOLUTION_MAX; 671 else 672 aprint_error("%s: error %d writing resolution register\n", 673 device_xname(sc->sc_dev), rv); 674 } 675 676 static void 677 sdtemp_config_idt(struct sdtemp_softc *sc) 678 { 679 int rv; 680 681 /* 682 * Set resolution to the max. 683 * 684 * Even if it fails, the resolution will be the default. It's not a 685 * fatal error. 686 */ 687 rv = sdtemp_write_16(sc, SDTEMP_REG_IDT_RESOLUTION, 688 __SHIFTIN(SDTEMP_CAP_RESOLUTION_MAX, SDTEMP_CAP_RESOLUTION)); 689 if (rv == 0) 690 sc->sc_resolution = SDTEMP_CAP_RESOLUTION_MAX; 691 else 692 aprint_error("%s: error %d writing resolution register\n", 693 device_xname(sc->sc_dev), rv); 694 } 695 696 MODULE(MODULE_CLASS_DRIVER, sdtemp, "i2cexec,sysmon_envsys"); 697 698 #ifdef _MODULE 699 #include "ioconf.c" 700 #endif 701 702 static int 703 sdtemp_modcmd(modcmd_t cmd, void *opaque) 704 { 705 int error = 0; 706 707 switch (cmd) { 708 case MODULE_CMD_INIT: 709 #ifdef _MODULE 710 error = config_init_component(cfdriver_ioconf_sdtemp, 711 cfattach_ioconf_sdtemp, cfdata_ioconf_sdtemp); 712 #endif 713 return error; 714 case MODULE_CMD_FINI: 715 #ifdef _MODULE 716 error = config_fini_component(cfdriver_ioconf_sdtemp, 717 cfattach_ioconf_sdtemp, cfdata_ioconf_sdtemp); 718 #endif 719 return error; 720 default: 721 return ENOTTY; 722 } 723 } 724
Indexes created Wed Oct 01 18:09:54 GMT 2025