1 /* $OpenBSD: rktemp.c,v 1.5 2019/07/02 20:14:44 kettenis Exp $ */ 2 /* 3 * Copyright (c) 2017 Mark Kettenis <kettenis@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <sys/param.h> 19 #include <sys/systm.h> 20 #include <sys/device.h> 21 #include <sys/sensors.h> 22 23 #include <machine/intr.h> 24 #include <machine/bus.h> 25 #include <machine/fdt.h> 26 27 #include <dev/ofw/openfirm.h> 28 #include <dev/ofw/ofw_clock.h> 29 #include <dev/ofw/ofw_misc.h> 30 #include <dev/ofw/ofw_pinctrl.h> 31 #include <dev/ofw/ofw_thermal.h> 32 #include <dev/ofw/fdt.h> 33 34 /* Registers */ 35 #define TSADC_USER_CON 0x0000 36 #define TSADC_AUTO_CON 0x0004 37 #define TSADC_AUTO_CON_TSHUT_POLARITY (1 << 8) 38 #define TSADC_AUTO_CON_SRC3_EN (1 << 7) 39 #define TSADC_AUTO_CON_SRC2_EN (1 << 6) 40 #define TSADC_AUTO_CON_SRC1_EN (1 << 5) 41 #define TSADC_AUTO_CON_SRC0_EN (1 << 4) 42 #define TSADC_AUTO_CON_TSADC_Q_SEL (1 << 1) 43 #define TSADC_AUTO_CON_AUTO_EN (1 << 0) 44 #define TSADC_INT_EN 0x0008 45 #define TSADC_INT_EN_TSHUT_2CRU_EN_SRC3 (1 << 11) 46 #define TSADC_INT_EN_TSHUT_2CRU_EN_SRC2 (1 << 10) 47 #define TSADC_INT_EN_TSHUT_2CRU_EN_SRC1 (1 << 9) 48 #define TSADC_INT_EN_TSHUT_2CRU_EN_SRC0 (1 << 8) 49 #define TSADC_INT_EN_TSHUT_2GPIO_EN_SRC3 (1 << 7) 50 #define TSADC_INT_EN_TSHUT_2GPIO_EN_SRC2 (1 << 6) 51 #define TSADC_INT_EN_TSHUT_2GPIO_EN_SRC1 (1 << 5) 52 #define TSADC_INT_EN_TSHUT_2GPIO_EN_SRC0 (1 << 4) 53 #define TSADC_INT_PD 0x000c 54 #define TSADC_DATA0 0x0020 55 #define TSADC_DATA1 0x0024 56 #define TSADC_DATA2 0x0028 57 #define TSADC_DATA3 0x002c 58 #define TSADC_COMP0_INT 0x0030 59 #define TSADC_COMP1_INT 0x0034 60 #define TSADC_COMP2_INT 0x0038 61 #define TSADC_COMP3_INT 0x003c 62 #define TSADC_COMP0_SHUT 0x0040 63 #define TSADC_COMP1_SHUT 0x0044 64 #define TSADC_COMP2_SHUT 0x0048 65 #define TSADC_COMP3_SHUT 0x004c 66 #define TSADC_AUTO_PERIOD 0x0068 67 #define TSADC_AUTO_PERIOD_HT 0x006c 68 69 #define HREAD4(sc, reg) \ 70 (bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg))) 71 #define HWRITE4(sc, reg, val) \ 72 bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val)) 73 74 struct rktemp_entry { 75 int32_t temp; 76 int32_t code; 77 }; 78 79 /* RK3288 conversion table. */ 80 struct rktemp_entry rk3288_temps[] = { 81 { -40000, 3800 }, 82 { -35000, 3792 }, 83 { -30000, 3783 }, 84 { -25000, 3774 }, 85 { -20000, 3765 }, 86 { -15000, 3756 }, 87 { -10000, 3747 }, 88 { -5000, 3737 }, 89 { 0, 3728 }, 90 { 5000, 3718 }, 91 { 10000, 3708 }, 92 { 15000, 3698 }, 93 { 20000, 3688 }, 94 { 25000, 3678 }, 95 { 30000, 3667 }, 96 { 35000, 3656 }, 97 { 40000, 3645 }, 98 { 45000, 3634 }, 99 { 50000, 3623 }, 100 { 55000, 3611 }, 101 { 60000, 3600 }, 102 { 65000, 3588 }, 103 { 70000, 3575 }, 104 { 75000, 3563 }, 105 { 80000, 3550 }, 106 { 85000, 3537 }, 107 { 90000, 3524 }, 108 { 95000, 3510 }, 109 { 100000, 3496 }, 110 { 105000, 3482 }, 111 { 110000, 3467 }, 112 { 115000, 3452 }, 113 { 120000, 3437 }, 114 { 125000, 3421 }, 115 }; 116 117 const char *rk3288_names[] = { "", "CPU", "GPU" }; 118 119 /* RK3328 conversion table. */ 120 struct rktemp_entry rk3328_temps[] = { 121 { -40000, 296 }, 122 { -35000, 304 }, 123 { -30000, 313 }, 124 { -20000, 331 }, 125 { -15000, 340 }, 126 { -10000, 349 }, 127 { -5000, 359 }, 128 { 0, 368 }, 129 { 5000, 378 }, 130 { 10000, 388 }, 131 { 15000, 398 }, 132 { 20000, 408 }, 133 { 25000, 418 }, 134 { 30000, 429 }, 135 { 35000, 440 }, 136 { 40000, 451 }, 137 { 45000, 462 }, 138 { 50000, 473 }, 139 { 55000, 485 }, 140 { 60000, 496 }, 141 { 65000, 508 }, 142 { 70000, 521 }, 143 { 75000, 533 }, 144 { 80000, 546 }, 145 { 85000, 559 }, 146 { 90000, 572 }, 147 { 95000, 586 }, 148 { 100000, 600 }, 149 { 105000, 614 }, 150 { 110000, 629 }, 151 { 115000, 644 }, 152 { 120000, 659 }, 153 { 125000, 675 }, 154 }; 155 156 const char *rk3328_names[] = { "CPU" }; 157 158 /* RK3399 conversion table. */ 159 struct rktemp_entry rk3399_temps[] = { 160 { -40000, 402 }, 161 { -35000, 410 }, 162 { -30000, 419 }, 163 { -25000, 427 }, 164 { -20000, 436 }, 165 { -15000, 444 }, 166 { -10000, 453 }, 167 { -5000, 461 }, 168 { 0, 470 }, 169 { 5000, 478 }, 170 { 10000, 487 }, 171 { 15000, 496 }, 172 { 20000, 504 }, 173 { 25000, 513 }, 174 { 30000, 521 }, 175 { 35000, 530 }, 176 { 40000, 538 }, 177 { 45000, 547 }, 178 { 50000, 555 }, 179 { 55000, 564 }, 180 { 60000, 573 }, 181 { 65000, 581 }, 182 { 70000, 590 }, 183 { 75000, 599 }, 184 { 80000, 607 }, 185 { 85000, 616 }, 186 { 90000, 624 }, 187 { 95000, 633 }, 188 { 100000, 642 }, 189 { 105000, 650 }, 190 { 110000, 659 }, 191 { 115000, 668 }, 192 { 120000, 677 }, 193 { 125000, 685 }, 194 }; 195 196 const char *rk3399_names[] = { "CPU", "GPU" }; 197 198 struct rktemp_softc { 199 struct device sc_dev; 200 bus_space_tag_t sc_iot; 201 bus_space_handle_t sc_ioh; 202 203 struct rktemp_entry *sc_temps; 204 int sc_ntemps; 205 206 struct ksensor sc_sensors[3]; 207 int sc_nsensors; 208 struct ksensordev sc_sensordev; 209 210 struct thermal_sensor sc_ts; 211 }; 212 213 int rktemp_match(struct device *, void *, void *); 214 void rktemp_attach(struct device *, struct device *, void *); 215 216 struct cfattach rktemp_ca = { 217 sizeof (struct rktemp_softc), rktemp_match, rktemp_attach 218 }; 219 220 struct cfdriver rktemp_cd = { 221 NULL, "rktemp", DV_DULL 222 }; 223 224 int32_t rktemp_calc_code(struct rktemp_softc *, int32_t); 225 int32_t rktemp_calc_temp(struct rktemp_softc *, int32_t); 226 int rktemp_valid(struct rktemp_softc *, int32_t); 227 void rktemp_refresh_sensors(void *); 228 int32_t rktemp_get_temperature(void *, uint32_t *); 229 230 int 231 rktemp_match(struct device *parent, void *match, void *aux) 232 { 233 struct fdt_attach_args *faa = aux; 234 235 return (OF_is_compatible(faa->fa_node, "rockchip,rk3288-tsadc") || 236 OF_is_compatible(faa->fa_node, "rockchip,rk3328-tsadc") || 237 OF_is_compatible(faa->fa_node, "rockchip,rk3399-tsadc")); 238 } 239 240 void 241 rktemp_attach(struct device *parent, struct device *self, void *aux) 242 { 243 struct rktemp_softc *sc = (struct rktemp_softc *)self; 244 struct fdt_attach_args *faa = aux; 245 const char **names; 246 uint32_t mode, polarity, temp; 247 uint32_t auto_con, int_en; 248 int node = faa->fa_node; 249 int i; 250 251 if (faa->fa_nreg < 1) { 252 printf(": no registers\n"); 253 return; 254 } 255 256 sc->sc_iot = faa->fa_iot; 257 if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, 258 faa->fa_reg[0].size, 0, &sc->sc_ioh)) { 259 printf(": can't map registers\n"); 260 return; 261 } 262 263 printf("\n"); 264 265 if (OF_is_compatible(node, "rockchip,rk3288-tsadc")) { 266 sc->sc_temps = rk3288_temps; 267 sc->sc_ntemps = nitems(rk3288_temps); 268 sc->sc_nsensors = 3; 269 names = rk3288_names; 270 } else if (OF_is_compatible(node, "rockchip,rk3328-tsadc")) { 271 sc->sc_temps = rk3328_temps; 272 sc->sc_ntemps = nitems(rk3328_temps); 273 sc->sc_nsensors = 1; 274 names = rk3328_names; 275 } else { 276 sc->sc_temps = rk3399_temps; 277 sc->sc_ntemps = nitems(rk3399_temps); 278 sc->sc_nsensors = 2; 279 names = rk3399_names; 280 } 281 282 pinctrl_byname(node, "init"); 283 284 clock_set_assigned(node); 285 clock_enable(node, "tsadc"); 286 clock_enable(node, "apb_pclk"); 287 288 /* Reset the TS-ADC controller block. */ 289 reset_assert(node, "tsadc-apb"); 290 delay(10); 291 reset_deassert(node, "tsadc-apb"); 292 293 mode = OF_getpropint(node, "rockchip,hw-tshut-mode", 1); 294 polarity = OF_getpropint(node, "rockchip,hw-tshut-polarity", 0); 295 temp = OF_getpropint(node, "rockchip,hw-tshut-temp", 95000); 296 297 auto_con = HREAD4(sc, TSADC_AUTO_CON); 298 auto_con |= TSADC_AUTO_CON_TSADC_Q_SEL; 299 if (polarity) 300 auto_con |= TSADC_AUTO_CON_TSHUT_POLARITY; 301 HWRITE4(sc, TSADC_AUTO_CON, auto_con); 302 303 /* Configure mode. */ 304 int_en = HREAD4(sc, TSADC_INT_EN); 305 for (i = 0; i < sc->sc_nsensors; i++) { 306 if (mode) 307 int_en |= (TSADC_INT_EN_TSHUT_2GPIO_EN_SRC0 << i); 308 else 309 int_en |= (TSADC_INT_EN_TSHUT_2CRU_EN_SRC0 << i); 310 } 311 HWRITE4(sc, TSADC_INT_EN, int_en); 312 313 /* Set shutdown limit. */ 314 for (i = 0; i < sc->sc_nsensors; i++) { 315 HWRITE4(sc, TSADC_COMP0_SHUT + i * 4, 316 rktemp_calc_code(sc, temp)); 317 auto_con |= (TSADC_AUTO_CON_SRC0_EN << i); 318 } 319 HWRITE4(sc, TSADC_AUTO_CON, auto_con); 320 321 pinctrl_byname(faa->fa_node, "default"); 322 323 /* Finally turn on the ADC. */ 324 auto_con |= TSADC_AUTO_CON_AUTO_EN; 325 HWRITE4(sc, TSADC_AUTO_CON, auto_con); 326 327 /* Register sensors. */ 328 strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname, 329 sizeof(sc->sc_sensordev.xname)); 330 for (i = 0; i < sc->sc_nsensors; i++) { 331 strlcpy(sc->sc_sensors[i].desc, names[i], 332 sizeof(sc->sc_sensors[i].desc)); 333 sc->sc_sensors[i].type = SENSOR_TEMP; 334 sc->sc_sensors[i].flags = SENSOR_FINVALID; 335 sensor_attach(&sc->sc_sensordev, &sc->sc_sensors[i]); 336 } 337 sensordev_install(&sc->sc_sensordev); 338 sensor_task_register(sc, rktemp_refresh_sensors, 5); 339 340 sc->sc_ts.ts_node = node; 341 sc->sc_ts.ts_cookie = sc; 342 sc->sc_ts.ts_get_temperature = rktemp_get_temperature; 343 thermal_sensor_register(&sc->sc_ts); 344 } 345 346 int32_t 347 rktemp_calc_code(struct rktemp_softc *sc, int32_t temp) 348 { 349 const int n = sc->sc_ntemps; 350 int32_t code0, delta_code; 351 int32_t temp0, delta_temp; 352 int i; 353 354 if (temp <= sc->sc_temps[0].temp) 355 return sc->sc_temps[0].code; 356 if (temp >= sc->sc_temps[n - 1].temp) 357 return sc->sc_temps[n - 1].code; 358 359 for (i = 1; i < n; i++) { 360 if (temp < sc->sc_temps[i].temp) 361 break; 362 } 363 364 code0 = sc->sc_temps[i - 1].code; 365 temp0 = sc->sc_temps[i - 1].temp; 366 delta_code = sc->sc_temps[i].code - code0; 367 delta_temp = sc->sc_temps[i].temp - temp0; 368 369 return code0 + (temp - temp0) * delta_code / delta_temp; 370 } 371 372 int32_t 373 rktemp_calc_temp(struct rktemp_softc *sc, int32_t code) 374 { 375 const int n = sc->sc_ntemps; 376 int32_t code0, delta_code; 377 int32_t temp0, delta_temp; 378 int i; 379 380 /* Handle both negative and postive temperature coefficients. */ 381 if (sc->sc_temps[0].code > sc->sc_temps[1].code) { 382 if (code >= sc->sc_temps[0].code) 383 return sc->sc_temps[0].code; 384 if (code <= sc->sc_temps[n - 1].code) 385 return sc->sc_temps[n - 1].temp; 386 387 for (i = 1; i < n; i++) { 388 if (code > sc->sc_temps[i].code) 389 break; 390 } 391 } else { 392 if (code <= sc->sc_temps[0].code) 393 return sc->sc_temps[0].temp; 394 if (code >= sc->sc_temps[n - 1].code) 395 return sc->sc_temps[n - 1].temp; 396 397 for (i = 1; i < n; i++) { 398 if (code < sc->sc_temps[i].code) 399 break; 400 } 401 } 402 403 code0 = sc->sc_temps[i - 1].code; 404 temp0 = sc->sc_temps[i - 1].temp; 405 delta_code = sc->sc_temps[i].code - code0; 406 delta_temp = sc->sc_temps[i].temp - temp0; 407 408 return temp0 + (code - code0) * delta_temp / delta_code; 409 } 410 411 int 412 rktemp_valid(struct rktemp_softc *sc, int32_t code) 413 { 414 const int n = sc->sc_ntemps; 415 416 if (sc->sc_temps[0].code > sc->sc_temps[1].code) { 417 if (code > sc->sc_temps[0].code) 418 return 0; 419 if (code < sc->sc_temps[n - 1].code) 420 return 0; 421 } else { 422 if (code < sc->sc_temps[0].code) 423 return 0; 424 if (code > sc->sc_temps[n - 1].code) 425 return 0; 426 } 427 return 1; 428 } 429 430 void 431 rktemp_refresh_sensors(void *arg) 432 { 433 struct rktemp_softc *sc = arg; 434 int32_t code, temp; 435 int i; 436 437 for (i = 0; i < sc->sc_nsensors; i++) { 438 code = HREAD4(sc, TSADC_DATA0 + i * 4); 439 temp = rktemp_calc_temp(sc, code); 440 sc->sc_sensors[i].value = 273150000 + 1000 * temp; 441 if (rktemp_valid(sc, code)) 442 sc->sc_sensors[i].flags &= ~SENSOR_FINVALID; 443 else 444 sc->sc_sensors[i].flags |= SENSOR_FINVALID; 445 } 446 } 447 448 int32_t 449 rktemp_get_temperature(void *cookie, uint32_t *cells) 450 { 451 struct rktemp_softc *sc = cookie; 452 uint32_t idx = cells[0]; 453 int32_t code; 454 455 if (idx >= sc->sc_nsensors) 456 return THERMAL_SENSOR_MAX; 457 458 code = HREAD4(sc, TSADC_DATA0 + idx * 4); 459 if (rktemp_valid(sc, code)) 460 return rktemp_calc_temp(sc, code); 461 else 462 return THERMAL_SENSOR_MAX; 463 } 464