1 /* $OpenBSD: rktemp.c,v 1.2 2017/12/29 10:39:01 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/fdt.h> 32 33 /* Registers */ 34 #define TSADC_USER_CON 0x0000 35 #define TSADC_AUTO_CON 0x0004 36 #define TSADC_AUTO_CON_TSHUT_POLARITY (1 << 8) 37 #define TSADC_AUTO_CON_SRC3_EN (1 << 7) 38 #define TSADC_AUTO_CON_SRC2_EN (1 << 6) 39 #define TSADC_AUTO_CON_SRC1_EN (1 << 5) 40 #define TSADC_AUTO_CON_SRC0_EN (1 << 4) 41 #define TSADC_AUTO_CON_TSADC_Q_SEL (1 << 1) 42 #define TSADC_AUTO_CON_AUTO_EN (1 << 0) 43 #define TSADC_INT_EN 0x0008 44 #define TSADC_INT_EN_TSHUT_2CRU_EN_SRC3 (1 << 11) 45 #define TSADC_INT_EN_TSHUT_2CRU_EN_SRC2 (1 << 10) 46 #define TSADC_INT_EN_TSHUT_2CRU_EN_SRC1 (1 << 9) 47 #define TSADC_INT_EN_TSHUT_2CRU_EN_SRC0 (1 << 8) 48 #define TSADC_INT_EN_TSHUT_2GPIO_EN_SRC3 (1 << 7) 49 #define TSADC_INT_EN_TSHUT_2GPIO_EN_SRC2 (1 << 6) 50 #define TSADC_INT_EN_TSHUT_2GPIO_EN_SRC1 (1 << 5) 51 #define TSADC_INT_EN_TSHUT_2GPIO_EN_SRC0 (1 << 4) 52 #define TSADC_INT_PD 0x000c 53 #define TSADC_DATA0 0x0020 54 #define TSADC_DATA1 0x0024 55 #define TSADC_DATA2 0x0028 56 #define TSADC_DATA3 0x002c 57 #define TSADC_COMP0_INT 0x0030 58 #define TSADC_COMP1_INT 0x0034 59 #define TSADC_COMP2_INT 0x0038 60 #define TSADC_COMP3_INT 0x003c 61 #define TSADC_COMP0_SHUT 0x0040 62 #define TSADC_COMP1_SHUT 0x0044 63 #define TSADC_COMP2_SHUT 0x0048 64 #define TSADC_COMP3_SHUT 0x004c 65 #define TSADC_AUTO_PERIOD 0x0068 66 #define TSADC_AUTO_PERIOD_HT 0x006c 67 68 #define HREAD4(sc, reg) \ 69 (bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg))) 70 #define HWRITE4(sc, reg, val) \ 71 bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val)) 72 73 struct rktemp_entry { 74 int32_t temp; 75 int32_t code; 76 }; 77 78 /* RK3288 conversion table. */ 79 struct rktemp_entry rk3288_temps[] = { 80 { -40000, 3800 }, 81 { -35000, 3792 }, 82 { -30000, 3783 }, 83 { -25000, 3774 }, 84 { -20000, 3765 }, 85 { -15000, 3756 }, 86 { -10000, 3747 }, 87 { -5000, 3737 }, 88 { 0, 3728 }, 89 { 5000, 3718 }, 90 { 10000, 3708 }, 91 { 15000, 3698 }, 92 { 20000, 3688 }, 93 { 25000, 3678 }, 94 { 30000, 3667 }, 95 { 35000, 3656 }, 96 { 40000, 3645 }, 97 { 45000, 3634 }, 98 { 50000, 3623 }, 99 { 55000, 3611 }, 100 { 60000, 3600 }, 101 { 65000, 3588 }, 102 { 70000, 3575 }, 103 { 75000, 3563 }, 104 { 80000, 3550 }, 105 { 85000, 3537 }, 106 { 90000, 3524 }, 107 { 95000, 3510 }, 108 { 100000, 3496 }, 109 { 105000, 3482 }, 110 { 110000, 3467 }, 111 { 115000, 3452 }, 112 { 120000, 3437 }, 113 { 125000, 3421 }, 114 }; 115 116 const char *rk3288_names[] = { "", "CPU", "GPU" }; 117 118 /* RK3399 conversion table. */ 119 struct rktemp_entry rk3399_temps[] = { 120 { -40000, 402 }, 121 { -35000, 410 }, 122 { -30000, 419 }, 123 { -25000, 427 }, 124 { -20000, 436 }, 125 { -15000, 444 }, 126 { -10000, 453 }, 127 { -5000, 461 }, 128 { 0, 470 }, 129 { 5000, 478 }, 130 { 10000, 487 }, 131 { 15000, 496 }, 132 { 20000, 504 }, 133 { 25000, 513 }, 134 { 30000, 521 }, 135 { 35000, 530 }, 136 { 40000, 538 }, 137 { 45000, 547 }, 138 { 50000, 555 }, 139 { 55000, 564 }, 140 { 60000, 573 }, 141 { 65000, 581 }, 142 { 70000, 590 }, 143 { 75000, 599 }, 144 { 80000, 607 }, 145 { 85000, 616 }, 146 { 90000, 624 }, 147 { 95000, 633 }, 148 { 100000, 642 }, 149 { 105000, 650 }, 150 { 110000, 659 }, 151 { 115000, 668 }, 152 { 120000, 677 }, 153 { 125000, 685 }, 154 }; 155 156 const char *rk3399_names[] = { "CPU", "GPU" }; 157 158 struct rktemp_softc { 159 struct device sc_dev; 160 bus_space_tag_t sc_iot; 161 bus_space_handle_t sc_ioh; 162 163 struct rktemp_entry *sc_temps; 164 int sc_ntemps; 165 166 struct ksensor sc_sensors[3]; 167 int sc_nsensors; 168 struct ksensordev sc_sensordev; 169 }; 170 171 int rktemp_match(struct device *, void *, void *); 172 void rktemp_attach(struct device *, struct device *, void *); 173 174 struct cfattach rktemp_ca = { 175 sizeof (struct rktemp_softc), rktemp_match, rktemp_attach 176 }; 177 178 struct cfdriver rktemp_cd = { 179 NULL, "rktemp", DV_DULL 180 }; 181 182 int32_t rktemp_calc_code(struct rktemp_softc *, int32_t); 183 int32_t rktemp_calc_temp(struct rktemp_softc *, int32_t); 184 int rktemp_valid(struct rktemp_softc *, int32_t); 185 void rktemp_refresh_sensors(void *); 186 187 int 188 rktemp_match(struct device *parent, void *match, void *aux) 189 { 190 struct fdt_attach_args *faa = aux; 191 192 return (OF_is_compatible(faa->fa_node, "rockchip,rk3288-tsadc") || 193 OF_is_compatible(faa->fa_node, "rockchip,rk3399-tsadc")); 194 } 195 196 void 197 rktemp_attach(struct device *parent, struct device *self, void *aux) 198 { 199 struct rktemp_softc *sc = (struct rktemp_softc *)self; 200 struct fdt_attach_args *faa = aux; 201 const char **names; 202 uint32_t mode, polarity, temp; 203 uint32_t auto_con, int_en; 204 int node = faa->fa_node; 205 int i; 206 207 if (faa->fa_nreg < 1) { 208 printf(": no registers\n"); 209 return; 210 } 211 212 sc->sc_iot = faa->fa_iot; 213 if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, 214 faa->fa_reg[0].size, 0, &sc->sc_ioh)) { 215 printf(": can't map registers\n"); 216 return; 217 } 218 219 printf("\n"); 220 221 if (OF_is_compatible(node, "rockchip,rk3288-tsadc")) { 222 sc->sc_temps = rk3288_temps; 223 sc->sc_ntemps = nitems(rk3288_temps); 224 sc->sc_nsensors = 3; 225 names = rk3288_names; 226 } else { 227 sc->sc_temps = rk3399_temps; 228 sc->sc_ntemps = nitems(rk3399_temps); 229 sc->sc_nsensors = 2; 230 names = rk3399_names; 231 } 232 233 pinctrl_byname(node, "init"); 234 235 clock_enable(node, "tsadc"); 236 clock_enable(node, "apb_pclk"); 237 238 /* Reset the TS-ADC controller block. */ 239 reset_assert(node, "tsadc-apb"); 240 delay(10); 241 reset_deassert(node, "tsadc-apb"); 242 243 mode = OF_getpropint(node, "rockchip,hw-tshut-mode", 1); 244 polarity = OF_getpropint(node, "rockchip,hw-tshut-polarity", 0); 245 temp = OF_getpropint(node, "rockchip,hw-tshut-temp", 95000); 246 247 auto_con = HREAD4(sc, TSADC_AUTO_CON); 248 auto_con |= TSADC_AUTO_CON_TSADC_Q_SEL; 249 if (polarity) 250 auto_con |= TSADC_AUTO_CON_TSHUT_POLARITY; 251 HWRITE4(sc, TSADC_AUTO_CON, auto_con); 252 253 /* Configure mode. */ 254 int_en = HREAD4(sc, TSADC_INT_EN); 255 for (i = 0; i < sc->sc_nsensors; i++) { 256 if (mode) 257 int_en |= (TSADC_INT_EN_TSHUT_2GPIO_EN_SRC0 << i); 258 else 259 int_en |= (TSADC_INT_EN_TSHUT_2CRU_EN_SRC0 << i); 260 } 261 HWRITE4(sc, TSADC_INT_EN, int_en); 262 263 /* Set shutdown limit. */ 264 for (i = 0; i < sc->sc_nsensors; i++) { 265 HWRITE4(sc, TSADC_COMP0_SHUT + i * 4, 266 rktemp_calc_code(sc, temp)); 267 auto_con |= (TSADC_AUTO_CON_SRC0_EN << i); 268 } 269 HWRITE4(sc, TSADC_AUTO_CON, auto_con); 270 271 pinctrl_byname(faa->fa_node, "default"); 272 273 /* Finally turn on the ADC. */ 274 auto_con |= TSADC_AUTO_CON_AUTO_EN; 275 HWRITE4(sc, TSADC_AUTO_CON, auto_con); 276 277 /* Register sensors. */ 278 strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname, 279 sizeof(sc->sc_sensordev.xname)); 280 for (i = 0; i < sc->sc_nsensors; i++) { 281 strlcpy(sc->sc_sensors[i].desc, names[i], 282 sizeof(sc->sc_sensors[i].desc)); 283 sc->sc_sensors[i].type = SENSOR_TEMP; 284 sc->sc_sensors[i].flags = SENSOR_FINVALID; 285 sensor_attach(&sc->sc_sensordev, &sc->sc_sensors[i]); 286 } 287 sensordev_install(&sc->sc_sensordev); 288 sensor_task_register(sc, rktemp_refresh_sensors, 5); 289 } 290 291 int32_t 292 rktemp_calc_code(struct rktemp_softc *sc, int32_t temp) 293 { 294 const int n = sc->sc_ntemps; 295 int32_t code0, delta_code; 296 int32_t temp0, delta_temp; 297 int i; 298 299 if (temp <= sc->sc_temps[0].temp) 300 return sc->sc_temps[0].code; 301 if (temp >= sc->sc_temps[n - 1].temp) 302 return sc->sc_temps[n - 1].code; 303 304 for (i = 1; i < n; i++) { 305 if (temp < sc->sc_temps[i].temp) 306 break; 307 } 308 309 code0 = sc->sc_temps[i - 1].code; 310 temp0 = sc->sc_temps[i - 1].temp; 311 delta_code = sc->sc_temps[i].code - code0; 312 delta_temp = sc->sc_temps[i].temp - temp0; 313 314 return code0 + (temp - temp0) * delta_code / delta_temp; 315 } 316 317 int32_t 318 rktemp_calc_temp(struct rktemp_softc *sc, int32_t code) 319 { 320 const int n = sc->sc_ntemps; 321 int32_t code0, delta_code; 322 int32_t temp0, delta_temp; 323 int i; 324 325 /* Handle both negative and postive temperature coefficients. */ 326 if (sc->sc_temps[0].code > sc->sc_temps[1].code) { 327 if (code >= sc->sc_temps[0].code) 328 return sc->sc_temps[0].code; 329 if (code <= sc->sc_temps[n - 1].code) 330 return sc->sc_temps[n - 1].temp; 331 332 for (i = 1; i < n; i++) { 333 if (code > sc->sc_temps[i].code) 334 break; 335 } 336 } else { 337 if (code <= sc->sc_temps[0].code) 338 return sc->sc_temps[0].temp; 339 if (code >= sc->sc_temps[n - 1].code) 340 return sc->sc_temps[n - 1].temp; 341 342 for (i = 1; i < n; i++) { 343 if (code < sc->sc_temps[i].code) 344 break; 345 } 346 } 347 348 code0 = sc->sc_temps[i - 1].code; 349 temp0 = sc->sc_temps[i - 1].temp; 350 delta_code = sc->sc_temps[i].code - code0; 351 delta_temp = sc->sc_temps[i].temp - temp0; 352 353 return temp0 + (code - code0) * delta_temp / delta_code; 354 } 355 356 int 357 rktemp_valid(struct rktemp_softc *sc, int32_t code) 358 { 359 const int n = sc->sc_ntemps; 360 361 if (sc->sc_temps[0].code > sc->sc_temps[1].code) { 362 if (code > sc->sc_temps[0].code) 363 return 0; 364 if (code < sc->sc_temps[n - 1].code) 365 return 0; 366 } else { 367 if (code < sc->sc_temps[0].code) 368 return 0; 369 if (code > sc->sc_temps[n - 1].code) 370 return 0; 371 } 372 return 1; 373 } 374 375 void 376 rktemp_refresh_sensors(void *arg) 377 { 378 struct rktemp_softc *sc = arg; 379 int32_t code, temp; 380 int i; 381 382 for (i = 0; i < sc->sc_nsensors; i++) { 383 code = HREAD4(sc, TSADC_DATA0 + i * 4); 384 temp = rktemp_calc_temp(sc, code); 385 sc->sc_sensors[i].value = 273150000 + 1000 * temp; 386 if (rktemp_valid(sc, code)) 387 sc->sc_sensors[i].flags &= ~SENSOR_FINVALID; 388 else 389 sc->sc_sensors[i].flags |= SENSOR_FINVALID; 390 } 391 } 392