drivers/thermal/exynos_thermal.c

   1 /*
   2  * exynos_thermal.c - Samsung EXYNOS TMU (Thermal Management Unit)
   3  *
   4  *  Copyright (C) 2011 Samsung Electronics
   5  *  Donggeun Kim <dg77.kim@samsung.com>
   6  *  Amit Daniel Kachhap <amit.kachhap@linaro.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/err.h>
  26 #include <linux/kernel.h>
  27 #include <linux/slab.h>
  28 #include <linux/platform_device.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/clk.h>
  31 #include <linux/workqueue.h>
  32 #include <linux/sysfs.h>
  33 #include <linux/kobject.h>
  34 #include <linux/io.h>
  35 #include <linux/mutex.h>
  36 #include <linux/platform_data/exynos_thermal.h>
  37 #include <linux/thermal.h>
  38 #include <linux/cpufreq.h>
  39 #include <linux/cpu_cooling.h>
  40 #include <linux/of.h>
  41
  42 /* Exynos generic registers */
  43 #define EXYNOS_TMU_REG_TRIMINFO         0x0
  44 #define EXYNOS_TMU_REG_CONTROL          0x20
  45 #define EXYNOS_TMU_REG_STATUS           0x28
  46 #define EXYNOS_TMU_REG_CURRENT_TEMP     0x40
  47 #define EXYNOS_TMU_REG_INTEN            0x70
  48 #define EXYNOS_TMU_REG_INTSTAT          0x74
  49 #define EXYNOS_TMU_REG_INTCLEAR         0x78
  50
  51 #define EXYNOS_TMU_TRIM_TEMP_MASK       0xff
  52 #define EXYNOS_TMU_GAIN_SHIFT           8
  53 #define EXYNOS_TMU_REF_VOLTAGE_SHIFT    24
  54 #define EXYNOS_TMU_CORE_ON              3
  55 #define EXYNOS_TMU_CORE_OFF             2
  56 #define EXYNOS_TMU_DEF_CODE_TO_TEMP_OFFSET      50
  57
  58 /* Exynos4210 specific registers */
  59 #define EXYNOS4210_TMU_REG_THRESHOLD_TEMP       0x44
  60 #define EXYNOS4210_TMU_REG_TRIG_LEVEL0  0x50
  61 #define EXYNOS4210_TMU_REG_TRIG_LEVEL1  0x54
  62 #define EXYNOS4210_TMU_REG_TRIG_LEVEL2  0x58
  63 #define EXYNOS4210_TMU_REG_TRIG_LEVEL3  0x5C
  64 #define EXYNOS4210_TMU_REG_PAST_TEMP0   0x60
  65 #define EXYNOS4210_TMU_REG_PAST_TEMP1   0x64
  66 #define EXYNOS4210_TMU_REG_PAST_TEMP2   0x68
  67 #define EXYNOS4210_TMU_REG_PAST_TEMP3   0x6C
  68
  69 #define EXYNOS4210_TMU_TRIG_LEVEL0_MASK 0x1
  70 #define EXYNOS4210_TMU_TRIG_LEVEL1_MASK 0x10
  71 #define EXYNOS4210_TMU_TRIG_LEVEL2_MASK 0x100
  72 #define EXYNOS4210_TMU_TRIG_LEVEL3_MASK 0x1000
  73 #define EXYNOS4210_TMU_INTCLEAR_VAL     0x1111
  74
  75 /* Exynos5250 and Exynos4412 specific registers */
  76 #define EXYNOS_TMU_TRIMINFO_CON 0x14
  77 #define EXYNOS_THD_TEMP_RISE            0x50
  78 #define EXYNOS_THD_TEMP_FALL            0x54
  79 #define EXYNOS_EMUL_CON         0x80
  80
  81 #define EXYNOS_TRIMINFO_RELOAD          0x1
  82 #define EXYNOS_TMU_CLEAR_RISE_INT       0x111
  83 #define EXYNOS_TMU_CLEAR_FALL_INT       (0x111 << 12)
  84 #define EXYNOS_MUX_ADDR_VALUE           6
  85 #define EXYNOS_MUX_ADDR_SHIFT           20
  86 #define EXYNOS_TMU_TRIP_MODE_SHIFT      13
  87
  88 #define EFUSE_MIN_VALUE 40
  89 #define EFUSE_MAX_VALUE 100
  90
  91 /* In-kernel thermal framework related macros & definations */
  92 #define SENSOR_NAME_LEN 16
  93 #define MAX_TRIP_COUNT  8
  94 #define MAX_COOLING_DEVICE 4
  95 #define MAX_THRESHOLD_LEVS 4
  96
  97 #define ACTIVE_INTERVAL 500
  98 #define IDLE_INTERVAL 10000
  99 #define MCELSIUS        1000
 100
 101 #ifdef CONFIG_THERMAL_EMULATION
 102 #define EXYNOS_EMUL_TIME        0x57F0
 103 #define EXYNOS_EMUL_TIME_SHIFT  16
 104 #define EXYNOS_EMUL_DATA_SHIFT  8
 105 #define EXYNOS_EMUL_DATA_MASK   0xFF
 106 #define EXYNOS_EMUL_ENABLE      0x1
 107 #endif /* CONFIG_THERMAL_EMULATION */
 108
 109 /* CPU Zone information */
 110 #define PANIC_ZONE      4
 111 #define WARN_ZONE       3
 112 #define MONITOR_ZONE    2
 113 #define SAFE_ZONE       1
 114
 115 #define GET_ZONE(trip) (trip + 2)
 116 #define GET_TRIP(zone) (zone - 2)
 117
 118 #define EXYNOS_ZONE_COUNT       3
 119
 120 struct exynos_tmu_data {
 121         struct exynos_tmu_platform_data *pdata;
 122         struct resource *mem;
 123         void __iomem *base;
 124         int irq;
 125         enum soc_type soc;
 126         struct work_struct irq_work;
 127         struct mutex lock;
 128         struct clk *clk;
 129         u8 temp_error1, temp_error2;
 130 };
 131
 132 struct  thermal_trip_point_conf {
 133         int trip_val[MAX_TRIP_COUNT];
 134         int trip_count;
 135         u8 trigger_falling;
 136 };
 137
 138 struct  thermal_cooling_conf {
 139         struct freq_clip_table freq_data[MAX_TRIP_COUNT];
 140         int freq_clip_count;
 141 };
 142
 143 struct thermal_sensor_conf {
 144         char name[SENSOR_NAME_LEN];
 145         int (*read_temperature)(void *data);
 146         int (*write_emul_temp)(void *drv_data, unsigned long temp);
 147         struct thermal_trip_point_conf trip_data;
 148         struct thermal_cooling_conf cooling_data;
 149         void *private_data;
 150 };
 151
 152 struct exynos_thermal_zone {
 153         enum thermal_device_mode mode;
 154         struct thermal_zone_device *therm_dev;
 155         struct thermal_cooling_device *cool_dev[MAX_COOLING_DEVICE];
 156         unsigned int cool_dev_size;
 157         struct platform_device *exynos4_dev;
 158         struct thermal_sensor_conf *sensor_conf;
 159         bool bind;
 160 };
 161
 162 static struct exynos_thermal_zone *th_zone;
 163 static void exynos_unregister_thermal(void);
 164 static int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf);
 165
 166 /* Get mode callback functions for thermal zone */
 167 static int exynos_get_mode(struct thermal_zone_device *thermal,
 168                         enum thermal_device_mode *mode)
 169 {
 170         if (th_zone)
 171                 *mode = th_zone->mode;
 172         return 0;
 173 }
 174
 175 /* Set mode callback functions for thermal zone */
 176 static int exynos_set_mode(struct thermal_zone_device *thermal,
 177                         enum thermal_device_mode mode)
 178 {
 179         if (!th_zone->therm_dev) {
 180                 pr_notice("thermal zone not registered\n");
 181                 return 0;
 182         }
 183
 184         mutex_lock(&th_zone->therm_dev->lock);
 185
 186         if (mode == THERMAL_DEVICE_ENABLED &&
 187                 !th_zone->sensor_conf->trip_data.trigger_falling)
 188                 th_zone->therm_dev->polling_delay = IDLE_INTERVAL;
 189         else
 190                 th_zone->therm_dev->polling_delay = 0;
 191
 192         mutex_unlock(&th_zone->therm_dev->lock);
 193
 194         th_zone->mode = mode;
 195         thermal_zone_device_update(th_zone->therm_dev);
 196         pr_info("thermal polling set for duration=%d msec\n",
 197                                 th_zone->therm_dev->polling_delay);
 198         return 0;
 199 }
 200
 201
 202 /* Get trip type callback functions for thermal zone */
 203 static int exynos_get_trip_type(struct thermal_zone_device *thermal, int trip,
 204                                  enum thermal_trip_type *type)
 205 {
 206         switch (GET_ZONE(trip)) {
 207         case MONITOR_ZONE:
 208         case WARN_ZONE:
 209                 *type = THERMAL_TRIP_ACTIVE;
 210                 break;
 211         case PANIC_ZONE:
 212                 *type = THERMAL_TRIP_CRITICAL;
 213                 break;
 214         default:
 215                 return -EINVAL;
 216         }
 217         return 0;
 218 }
 219
 220 /* Get trip temperature callback functions for thermal zone */
 221 static int exynos_get_trip_temp(struct thermal_zone_device *thermal, int trip,
 222                                 unsigned long *temp)
 223 {
 224         if (trip < GET_TRIP(MONITOR_ZONE) || trip > GET_TRIP(PANIC_ZONE))
 225                 return -EINVAL;
 226
 227         *temp = th_zone->sensor_conf->trip_data.trip_val[trip];
 228         /* convert the temperature into millicelsius */
 229         *temp = *temp * MCELSIUS;
 230
 231         return 0;
 232 }
 233
 234 /* Get critical temperature callback functions for thermal zone */
 235 static int exynos_get_crit_temp(struct thermal_zone_device *thermal,
 236                                 unsigned long *temp)
 237 {
 238         int ret;
 239         /* Panic zone */
 240         ret = exynos_get_trip_temp(thermal, GET_TRIP(PANIC_ZONE), temp);
 241         return ret;
 242 }
 243
 244 /* Bind callback functions for thermal zone */
 245 static int exynos_bind(struct thermal_zone_device *thermal,
 246                         struct thermal_cooling_device *cdev)
 247 {
 248         int ret = 0, i, tab_size, level;
 249         struct freq_clip_table *tab_ptr, *clip_data;
 250         struct thermal_sensor_conf *data = th_zone->sensor_conf;
 251
 252         tab_ptr = (struct freq_clip_table *)data->cooling_data.freq_data;
 253         tab_size = data->cooling_data.freq_clip_count;
 254
 255         if (tab_ptr == NULL || tab_size == 0)
 256                 return -EINVAL;
 257
 258         /* find the cooling device registered*/
 259         for (i = 0; i < th_zone->cool_dev_size; i++)
 260                 if (cdev == th_zone->cool_dev[i])
 261                         break;
 262
 263         /* No matching cooling device */
 264         if (i == th_zone->cool_dev_size)
 265                 return 0;
 266
 267         /* Bind the thermal zone to the cpufreq cooling device */
 268         for (i = 0; i < tab_size; i++) {
 269                 clip_data = (struct freq_clip_table *)&(tab_ptr[i]);
 270                 level = cpufreq_cooling_get_level(0, clip_data->freq_clip_max);
 271                 if (level == THERMAL_CSTATE_INVALID)
 272                         return 0;
 273                 switch (GET_ZONE(i)) {
 274                 case MONITOR_ZONE:
 275                 case WARN_ZONE:
 276                         if (thermal_zone_bind_cooling_device(thermal, i, cdev,
 277                                                                 level, 0)) {
 278                                 pr_err("error binding cdev inst %d\n", i);
 279                                 ret = -EINVAL;
 280                         }
 281                         th_zone->bind = true;
 282                         break;
 283                 default:
 284                         ret = -EINVAL;
 285                 }
 286         }
 287
 288         return ret;
 289 }
 290
 291 /* Unbind callback functions for thermal zone */
 292 static int exynos_unbind(struct thermal_zone_device *thermal,
 293                         struct thermal_cooling_device *cdev)
 294 {
 295         int ret = 0, i, tab_size;
 296         struct thermal_sensor_conf *data = th_zone->sensor_conf;
 297
 298         if (th_zone->bind == false)
 299                 return 0;
 300
 301         tab_size = data->cooling_data.freq_clip_count;
 302
 303         if (tab_size == 0)
 304                 return -EINVAL;
 305
 306         /* find the cooling device registered*/
 307         for (i = 0; i < th_zone->cool_dev_size; i++)
 308                 if (cdev == th_zone->cool_dev[i])
 309                         break;
 310
 311         /* No matching cooling device */
 312         if (i == th_zone->cool_dev_size)
 313                 return 0;
 314
 315         /* Bind the thermal zone to the cpufreq cooling device */
 316         for (i = 0; i < tab_size; i++) {
 317                 switch (GET_ZONE(i)) {
 318                 case MONITOR_ZONE:
 319                 case WARN_ZONE:
 320                         if (thermal_zone_unbind_cooling_device(thermal, i,
 321                                                                 cdev)) {
 322                                 pr_err("error unbinding cdev inst=%d\n", i);
 323                                 ret = -EINVAL;
 324                         }
 325                         th_zone->bind = false;
 326                         break;
 327                 default:
 328                         ret = -EINVAL;
 329                 }
 330         }
 331         return ret;
 332 }
 333
 334 /* Get temperature callback functions for thermal zone */
 335 static int exynos_get_temp(struct thermal_zone_device *thermal,
 336                         unsigned long *temp)
 337 {
 338         void *data;
 339
 340         if (!th_zone->sensor_conf) {
 341                 pr_info("Temperature sensor not initialised\n");
 342                 return -EINVAL;
 343         }
 344         data = th_zone->sensor_conf->private_data;
 345         *temp = th_zone->sensor_conf->read_temperature(data);
 346         /* convert the temperature into millicelsius */
 347         *temp = *temp * MCELSIUS;
 348         return 0;
 349 }
 350
 351 /* Get temperature callback functions for thermal zone */
 352 static int exynos_set_emul_temp(struct thermal_zone_device *thermal,
 353                                                 unsigned long temp)
 354 {
 355         void *data;
 356         int ret = -EINVAL;
 357
 358         if (!th_zone->sensor_conf) {
 359                 pr_info("Temperature sensor not initialised\n");
 360                 return -EINVAL;
 361         }
 362         data = th_zone->sensor_conf->private_data;
 363         if (th_zone->sensor_conf->write_emul_temp)
 364                 ret = th_zone->sensor_conf->write_emul_temp(data, temp);
 365         return ret;
 366 }
 367
 368 /* Get the temperature trend */
 369 static int exynos_get_trend(struct thermal_zone_device *thermal,
 370                         int trip, enum thermal_trend *trend)
 371 {
 372         int ret;
 373         unsigned long trip_temp;
 374
 375         ret = exynos_get_trip_temp(thermal, trip, &trip_temp);
 376         if (ret < 0)
 377                 return ret;
 378
 379         if (thermal->temperature >= trip_temp)
 380                 *trend = THERMAL_TREND_RAISE_FULL;
 381         else
 382                 *trend = THERMAL_TREND_DROP_FULL;
 383
 384         return 0;
 385 }
 386 /* Operation callback functions for thermal zone */
 387 static struct thermal_zone_device_ops const exynos_dev_ops = {
 388         .bind = exynos_bind,
 389         .unbind = exynos_unbind,
 390         .get_temp = exynos_get_temp,
 391         .set_emul_temp = exynos_set_emul_temp,
 392         .get_trend = exynos_get_trend,
 393         .get_mode = exynos_get_mode,
 394         .set_mode = exynos_set_mode,
 395         .get_trip_type = exynos_get_trip_type,
 396         .get_trip_temp = exynos_get_trip_temp,
 397         .get_crit_temp = exynos_get_crit_temp,
 398 };
 399
 400 /*
 401  * This function may be called from interrupt based temperature sensor
 402  * when threshold is changed.
 403  */
 404 static void exynos_report_trigger(void)
 405 {
 406         unsigned int i;
 407         char data[10];
 408         char *envp[] = { data, NULL };
 409
 410         if (!th_zone || !th_zone->therm_dev)
 411                 return;
 412         if (th_zone->bind == false) {
 413                 for (i = 0; i < th_zone->cool_dev_size; i++) {
 414                         if (!th_zone->cool_dev[i])
 415                                 continue;
 416                         exynos_bind(th_zone->therm_dev,
 417                                         th_zone->cool_dev[i]);
 418                 }
 419         }
 420
 421         thermal_zone_device_update(th_zone->therm_dev);
 422
 423         mutex_lock(&th_zone->therm_dev->lock);
 424         /* Find the level for which trip happened */
 425         for (i = 0; i < th_zone->sensor_conf->trip_data.trip_count; i++) {
 426                 if (th_zone->therm_dev->last_temperature <
 427                         th_zone->sensor_conf->trip_data.trip_val[i] * MCELSIUS)
 428                         break;
 429         }
 430
 431         if (th_zone->mode == THERMAL_DEVICE_ENABLED &&
 432                 !th_zone->sensor_conf->trip_data.trigger_falling) {
 433                 if (i > 0)
 434                         th_zone->therm_dev->polling_delay = ACTIVE_INTERVAL;
 435                 else
 436                         th_zone->therm_dev->polling_delay = IDLE_INTERVAL;
 437         }
 438
 439         snprintf(data, sizeof(data), "%u", i);
 440         kobject_uevent_env(&th_zone->therm_dev->device.kobj, KOBJ_CHANGE, envp);
 441         mutex_unlock(&th_zone->therm_dev->lock);
 442 }
 443
 444 /* Register with the in-kernel thermal management */
 445 static int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf)
 446 {
 447         int ret;
 448         struct cpumask mask_val;
 449
 450         if (!sensor_conf || !sensor_conf->read_temperature) {
 451                 pr_err("Temperature sensor not initialised\n");
 452                 return -EINVAL;
 453         }
 454
 455         th_zone = kzalloc(sizeof(struct exynos_thermal_zone), GFP_KERNEL);
 456         if (!th_zone)
 457                 return -ENOMEM;
 458
 459         th_zone->sensor_conf = sensor_conf;
 460         cpumask_set_cpu(0, &mask_val);
 461         th_zone->cool_dev[0] = cpufreq_cooling_register(&mask_val);
 462         if (IS_ERR(th_zone->cool_dev[0])) {
 463                 pr_err("Failed to register cpufreq cooling device\n");
 464                 ret = -EINVAL;
 465                 goto err_unregister;
 466         }
 467         th_zone->cool_dev_size++;
 468
 469         th_zone->therm_dev = thermal_zone_device_register(sensor_conf->name,
 470                         EXYNOS_ZONE_COUNT, 0, NULL, &exynos_dev_ops, NULL, 0,
 471                         sensor_conf->trip_data.trigger_falling ?
 472                         0 : IDLE_INTERVAL);
 473
 474         if (IS_ERR(th_zone->therm_dev)) {
 475                 pr_err("Failed to register thermal zone device\n");
 476                 ret = PTR_ERR(th_zone->therm_dev);
 477                 goto err_unregister;
 478         }
 479         th_zone->mode = THERMAL_DEVICE_ENABLED;
 480
 481         pr_info("Exynos: Kernel Thermal management registered\n");
 482
 483         return 0;
 484
 485 err_unregister:
 486         exynos_unregister_thermal();
 487         return ret;
 488 }
 489
 490 /* Un-Register with the in-kernel thermal management */
 491 static void exynos_unregister_thermal(void)
 492 {
 493         int i;
 494
 495         if (!th_zone)
 496                 return;
 497
 498         if (th_zone->therm_dev)
 499                 thermal_zone_device_unregister(th_zone->therm_dev);
 500
 501         for (i = 0; i < th_zone->cool_dev_size; i++) {
 502                 if (th_zone->cool_dev[i])
 503                         cpufreq_cooling_unregister(th_zone->cool_dev[i]);
 504         }
 505
 506         kfree(th_zone);
 507         pr_info("Exynos: Kernel Thermal management unregistered\n");
 508 }
 509
 510 /*
 511  * TMU treats temperature as a mapped temperature code.
 512  * The temperature is converted differently depending on the calibration type.
 513  */
 514 static int temp_to_code(struct exynos_tmu_data *data, u8 temp)
 515 {
 516         struct exynos_tmu_platform_data *pdata = data->pdata;
 517         int temp_code;
 518
 519         if (data->soc == SOC_ARCH_EXYNOS4210)
 520                 /* temp should range between 25 and 125 */
 521                 if (temp < 25 || temp > 125) {
 522                         temp_code = -EINVAL;
 523                         goto out;
 524                 }
 525
 526         switch (pdata->cal_type) {
 527         case TYPE_TWO_POINT_TRIMMING:
 528                 temp_code = (temp - 25) *
 529                     (data->temp_error2 - data->temp_error1) /
 530                     (85 - 25) + data->temp_error1;
 531                 break;
 532         case TYPE_ONE_POINT_TRIMMING:
 533                 temp_code = temp + data->temp_error1 - 25;
 534                 break;
 535         default:
 536                 temp_code = temp + EXYNOS_TMU_DEF_CODE_TO_TEMP_OFFSET;
 537                 break;
 538         }
 539 out:
 540         return temp_code;
 541 }
 542
 543 /*
 544  * Calculate a temperature value from a temperature code.
 545  * The unit of the temperature is degree Celsius.
 546  */
 547 static int code_to_temp(struct exynos_tmu_data *data, u8 temp_code)
 548 {
 549         struct exynos_tmu_platform_data *pdata = data->pdata;
 550         int temp;
 551
 552         if (data->soc == SOC_ARCH_EXYNOS4210)
 553                 /* temp_code should range between 75 and 175 */
 554                 if (temp_code < 75 || temp_code > 175) {
 555                         temp = -ENODATA;
 556                         goto out;
 557                 }
 558
 559         switch (pdata->cal_type) {
 560         case TYPE_TWO_POINT_TRIMMING:
 561                 temp = (temp_code - data->temp_error1) * (85 - 25) /
 562                     (data->temp_error2 - data->temp_error1) + 25;
 563                 break;
 564         case TYPE_ONE_POINT_TRIMMING:
 565                 temp = temp_code - data->temp_error1 + 25;
 566                 break;
 567         default:
 568                 temp = temp_code - EXYNOS_TMU_DEF_CODE_TO_TEMP_OFFSET;
 569                 break;
 570         }
 571 out:
 572         return temp;
 573 }
 574
 575 static int exynos_tmu_initialize(struct platform_device *pdev)
 576 {
 577         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 578         struct exynos_tmu_platform_data *pdata = data->pdata;
 579         unsigned int status, trim_info;
 580         unsigned int rising_threshold = 0, falling_threshold = 0;
 581         int ret = 0, threshold_code, i, trigger_levs = 0;
 582
 583         mutex_lock(&data->lock);
 584         clk_enable(data->clk);
 585
 586         status = readb(data->base + EXYNOS_TMU_REG_STATUS);
 587         if (!status) {
 588                 ret = -EBUSY;
 589                 goto out;
 590         }
 591
 592         if (data->soc == SOC_ARCH_EXYNOS) {
 593                 __raw_writel(EXYNOS_TRIMINFO_RELOAD,
 594                                 data->base + EXYNOS_TMU_TRIMINFO_CON);
 595         }
 596         /* Save trimming info in order to perform calibration */
 597         trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO);
 598         data->temp_error1 = trim_info & EXYNOS_TMU_TRIM_TEMP_MASK;
 599         data->temp_error2 = ((trim_info >> 8) & EXYNOS_TMU_TRIM_TEMP_MASK);
 600
 601         if ((EFUSE_MIN_VALUE > data->temp_error1) ||
 602                         (data->temp_error1 > EFUSE_MAX_VALUE) ||
 603                         (data->temp_error2 != 0))
 604                 data->temp_error1 = pdata->efuse_value;
 605
 606         /* Count trigger levels to be enabled */
 607         for (i = 0; i < MAX_THRESHOLD_LEVS; i++)
 608                 if (pdata->trigger_levels[i])
 609                         trigger_levs++;
 610
 611         if (data->soc == SOC_ARCH_EXYNOS4210) {
 612                 /* Write temperature code for threshold */
 613                 threshold_code = temp_to_code(data, pdata->threshold);
 614                 if (threshold_code < 0) {
 615                         ret = threshold_code;
 616                         goto out;
 617                 }
 618                 writeb(threshold_code,
 619                         data->base + EXYNOS4210_TMU_REG_THRESHOLD_TEMP);
 620                 for (i = 0; i < trigger_levs; i++)
 621                         writeb(pdata->trigger_levels[i],
 622                         data->base + EXYNOS4210_TMU_REG_TRIG_LEVEL0 + i * 4);
 623
 624                 writel(EXYNOS4210_TMU_INTCLEAR_VAL,
 625                         data->base + EXYNOS_TMU_REG_INTCLEAR);
 626         } else if (data->soc == SOC_ARCH_EXYNOS) {
 627                 /* Write temperature code for rising and falling threshold */
 628                 for (i = 0; i < trigger_levs; i++) {
 629                         threshold_code = temp_to_code(data,
 630                                                 pdata->trigger_levels[i]);
 631                         if (threshold_code < 0) {
 632                                 ret = threshold_code;
 633                                 goto out;
 634                         }
 635                         rising_threshold |= threshold_code << 8 * i;
 636                         if (pdata->threshold_falling) {
 637                                 threshold_code = temp_to_code(data,
 638                                                 pdata->trigger_levels[i] -
 639                                                 pdata->threshold_falling);
 640                                 if (threshold_code > 0)
 641                                         falling_threshold |=
 642                                                 threshold_code << 8 * i;
 643                         }
 644                 }
 645
 646                 writel(rising_threshold,
 647                                 data->base + EXYNOS_THD_TEMP_RISE);
 648                 writel(falling_threshold,
 649                                 data->base + EXYNOS_THD_TEMP_FALL);
 650
 651                 writel(EXYNOS_TMU_CLEAR_RISE_INT | EXYNOS_TMU_CLEAR_FALL_INT,
 652                                 data->base + EXYNOS_TMU_REG_INTCLEAR);
 653         }
 654 out:
 655         clk_disable(data->clk);
 656         mutex_unlock(&data->lock);
 657
 658         return ret;
 659 }
 660
 661 static void exynos_tmu_control(struct platform_device *pdev, bool on)
 662 {
 663         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 664         struct exynos_tmu_platform_data *pdata = data->pdata;
 665         unsigned int con, interrupt_en;
 666
 667         mutex_lock(&data->lock);
 668         clk_enable(data->clk);
 669
 670         con = pdata->reference_voltage << EXYNOS_TMU_REF_VOLTAGE_SHIFT |
 671                 pdata->gain << EXYNOS_TMU_GAIN_SHIFT;
 672
 673         if (data->soc == SOC_ARCH_EXYNOS) {
 674                 con |= pdata->noise_cancel_mode << EXYNOS_TMU_TRIP_MODE_SHIFT;
 675                 con |= (EXYNOS_MUX_ADDR_VALUE << EXYNOS_MUX_ADDR_SHIFT);
 676         }
 677
 678         if (on) {
 679                 con |= EXYNOS_TMU_CORE_ON;
 680                 interrupt_en = pdata->trigger_level3_en << 12 |
 681                         pdata->trigger_level2_en << 8 |
 682                         pdata->trigger_level1_en << 4 |
 683                         pdata->trigger_level0_en;
 684                 if (pdata->threshold_falling)
 685                         interrupt_en |= interrupt_en << 16;
 686         } else {
 687                 con |= EXYNOS_TMU_CORE_OFF;
 688                 interrupt_en = 0; /* Disable all interrupts */
 689         }
 690         writel(interrupt_en, data->base + EXYNOS_TMU_REG_INTEN);
 691         writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
 692
 693         clk_disable(data->clk);
 694         mutex_unlock(&data->lock);
 695 }
 696
 697 static int exynos_tmu_read(struct exynos_tmu_data *data)
 698 {
 699         u8 temp_code;
 700         int temp;
 701
 702         mutex_lock(&data->lock);
 703         clk_enable(data->clk);
 704
 705         temp_code = readb(data->base + EXYNOS_TMU_REG_CURRENT_TEMP);
 706         temp = code_to_temp(data, temp_code);
 707
 708         clk_disable(data->clk);
 709         mutex_unlock(&data->lock);
 710
 711         return temp;
 712 }
 713
 714 #ifdef CONFIG_THERMAL_EMULATION
 715 static int exynos_tmu_set_emulation(void *drv_data, unsigned long temp)
 716 {
 717         struct exynos_tmu_data *data = drv_data;
 718         unsigned int reg;
 719         int ret = -EINVAL;
 720
 721         if (data->soc == SOC_ARCH_EXYNOS4210)
 722                 goto out;
 723
 724         if (temp && temp < MCELSIUS)
 725                 goto out;
 726
 727         mutex_lock(&data->lock);
 728         clk_enable(data->clk);
 729
 730         reg = readl(data->base + EXYNOS_EMUL_CON);
 731
 732         if (temp) {
 733                 temp /= MCELSIUS;
 734
 735                 reg = (EXYNOS_EMUL_TIME << EXYNOS_EMUL_TIME_SHIFT) |
 736                         (temp_to_code(data, temp)
 737                          << EXYNOS_EMUL_DATA_SHIFT) | EXYNOS_EMUL_ENABLE;
 738         } else {
 739                 reg &= ~EXYNOS_EMUL_ENABLE;
 740         }
 741
 742         writel(reg, data->base + EXYNOS_EMUL_CON);
 743
 744         clk_disable(data->clk);
 745         mutex_unlock(&data->lock);
 746         return 0;
 747 out:
 748         return ret;
 749 }
 750 #else
 751 static int exynos_tmu_set_emulation(void *drv_data,     unsigned long temp)
 752         { return -EINVAL; }
 753 #endif/*CONFIG_THERMAL_EMULATION*/
 754
 755 static void exynos_tmu_work(struct work_struct *work)
 756 {
 757         struct exynos_tmu_data *data = container_of(work,
 758                         struct exynos_tmu_data, irq_work);
 759
 760         exynos_report_trigger();
 761         mutex_lock(&data->lock);
 762         clk_enable(data->clk);
 763         if (data->soc == SOC_ARCH_EXYNOS)
 764                 writel(EXYNOS_TMU_CLEAR_RISE_INT |
 765                                 EXYNOS_TMU_CLEAR_FALL_INT,
 766                                 data->base + EXYNOS_TMU_REG_INTCLEAR);
 767         else
 768                 writel(EXYNOS4210_TMU_INTCLEAR_VAL,
 769                                 data->base + EXYNOS_TMU_REG_INTCLEAR);
 770         clk_disable(data->clk);
 771         mutex_unlock(&data->lock);
 772
 773         enable_irq(data->irq);
 774 }
 775
 776 static irqreturn_t exynos_tmu_irq(int irq, void *id)
 777 {
 778         struct exynos_tmu_data *data = id;
 779
 780         disable_irq_nosync(irq);
 781         schedule_work(&data->irq_work);
 782
 783         return IRQ_HANDLED;
 784 }
 785 static struct thermal_sensor_conf exynos_sensor_conf = {
 786         .name                   = "exynos-therm",
 787         .read_temperature       = (int (*)(void *))exynos_tmu_read,
 788         .write_emul_temp        = exynos_tmu_set_emulation,
 789 };
 790
 791 #if defined(CONFIG_CPU_EXYNOS4210)
 792 static struct exynos_tmu_platform_data const exynos4210_default_tmu_data = {
 793         .threshold = 80,
 794         .trigger_levels[0] = 5,
 795         .trigger_levels[1] = 20,
 796         .trigger_levels[2] = 30,
 797         .trigger_level0_en = 1,
 798         .trigger_level1_en = 1,
 799         .trigger_level2_en = 1,
 800         .trigger_level3_en = 0,
 801         .gain = 15,
 802         .reference_voltage = 7,
 803         .cal_type = TYPE_ONE_POINT_TRIMMING,
 804         .freq_tab[0] = {
 805                 .freq_clip_max = 800 * 1000,
 806                 .temp_level = 85,
 807         },
 808         .freq_tab[1] = {
 809                 .freq_clip_max = 200 * 1000,
 810                 .temp_level = 100,
 811         },
 812         .freq_tab_count = 2,
 813         .type = SOC_ARCH_EXYNOS4210,
 814 };
 815 #define EXYNOS4210_TMU_DRV_DATA (&exynos4210_default_tmu_data)
 816 #else
 817 #define EXYNOS4210_TMU_DRV_DATA (NULL)
 818 #endif
 819
 820 #if defined(CONFIG_SOC_EXYNOS5250) || defined(CONFIG_SOC_EXYNOS4412) || \
 821         defined(CONFIG_SOC_EXYNOS4212)
 822 static struct exynos_tmu_platform_data const exynos_default_tmu_data = {
 823         .threshold_falling = 10,
 824         .trigger_levels[0] = 85,
 825         .trigger_levels[1] = 103,
 826         .trigger_levels[2] = 110,
 827         .trigger_level0_en = 1,
 828         .trigger_level1_en = 1,
 829         .trigger_level2_en = 1,
 830         .trigger_level3_en = 0,
 831         .gain = 8,
 832         .reference_voltage = 16,
 833         .noise_cancel_mode = 4,
 834         .cal_type = TYPE_ONE_POINT_TRIMMING,
 835         .efuse_value = 55,
 836         .freq_tab[0] = {
 837                 .freq_clip_max = 800 * 1000,
 838                 .temp_level = 85,
 839         },
 840         .freq_tab[1] = {
 841                 .freq_clip_max = 200 * 1000,
 842                 .temp_level = 103,
 843         },
 844         .freq_tab_count = 2,
 845         .type = SOC_ARCH_EXYNOS,
 846 };
 847 #define EXYNOS_TMU_DRV_DATA (&exynos_default_tmu_data)
 848 #else
 849 #define EXYNOS_TMU_DRV_DATA (NULL)
 850 #endif
 851
 852 #ifdef CONFIG_OF
 853 static const struct of_device_id exynos_tmu_match[] = {
 854         {
 855                 .compatible = "samsung,exynos4210-tmu",
 856                 .data = (void *)EXYNOS4210_TMU_DRV_DATA,
 857         },
 858         {
 859                 .compatible = "samsung,exynos4412-tmu",
 860                 .data = (void *)EXYNOS_TMU_DRV_DATA,
 861         },
 862         {
 863                 .compatible = "samsung,exynos5250-tmu",
 864                 .data = (void *)EXYNOS_TMU_DRV_DATA,
 865         },
 866         {},
 867 };
 868 MODULE_DEVICE_TABLE(of, exynos_tmu_match);
 869 #endif
 870
 871 static struct platform_device_id exynos_tmu_driver_ids[] = {
 872         {
 873                 .name           = "exynos4210-tmu",
 874                 .driver_data    = (kernel_ulong_t)EXYNOS4210_TMU_DRV_DATA,
 875         },
 876         {
 877                 .name           = "exynos5250-tmu",
 878                 .driver_data    = (kernel_ulong_t)EXYNOS_TMU_DRV_DATA,
 879         },
 880         { },
 881 };
 882 MODULE_DEVICE_TABLE(platform, exynos_tmu_driver_ids);
 883
 884 static inline struct  exynos_tmu_platform_data *exynos_get_driver_data(
 885                         struct platform_device *pdev)
 886 {
 887 #ifdef CONFIG_OF
 888         if (pdev->dev.of_node) {
 889                 const struct of_device_id *match;
 890                 match = of_match_node(exynos_tmu_match, pdev->dev.of_node);
 891                 if (!match)
 892                         return NULL;
 893                 return (struct exynos_tmu_platform_data *) match->data;
 894         }
 895 #endif
 896         return (struct exynos_tmu_platform_data *)
 897                         platform_get_device_id(pdev)->driver_data;
 898 }
 899
 900 static int exynos_tmu_probe(struct platform_device *pdev)
 901 {
 902         struct exynos_tmu_data *data;
 903         struct exynos_tmu_platform_data *pdata = pdev->dev.platform_data;
 904         int ret, i;
 905
 906         if (!pdata)
 907                 pdata = exynos_get_driver_data(pdev);
 908
 909         if (!pdata) {
 910                 dev_err(&pdev->dev, "No platform init data supplied.\n");
 911                 return -ENODEV;
 912         }
 913         data = devm_kzalloc(&pdev->dev, sizeof(struct exynos_tmu_data),
 914                                         GFP_KERNEL);
 915         if (!data) {
 916                 dev_err(&pdev->dev, "Failed to allocate driver structure\n");
 917                 return -ENOMEM;
 918         }
 919
 920         data->irq = platform_get_irq(pdev, 0);
 921         if (data->irq < 0) {
 922                 dev_err(&pdev->dev, "Failed to get platform irq\n");
 923                 return data->irq;
 924         }
 925
 926         INIT_WORK(&data->irq_work, exynos_tmu_work);
 927
 928         data->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 929         data->base = devm_ioremap_resource(&pdev->dev, data->mem);
 930         if (IS_ERR(data->base))
 931                 return PTR_ERR(data->base);
 932
 933         ret = devm_request_irq(&pdev->dev, data->irq, exynos_tmu_irq,
 934                 IRQF_TRIGGER_RISING, "exynos-tmu", data);
 935         if (ret) {
 936                 dev_err(&pdev->dev, "Failed to request irq: %d\n", data->irq);
 937                 return ret;
 938         }
 939
 940         data->clk = devm_clk_get(&pdev->dev, "tmu_apbif");
 941         if (IS_ERR(data->clk)) {
 942                 dev_err(&pdev->dev, "Failed to get clock\n");
 943                 return  PTR_ERR(data->clk);
 944         }
 945
 946         ret = clk_prepare(data->clk);
 947         if (ret)
 948                 return ret;
 949
 950         if (pdata->type == SOC_ARCH_EXYNOS ||
 951                                 pdata->type == SOC_ARCH_EXYNOS4210)
 952                 data->soc = pdata->type;
 953         else {
 954                 ret = -EINVAL;
 955                 dev_err(&pdev->dev, "Platform not supported\n");
 956                 goto err_clk;
 957         }
 958
 959         data->pdata = pdata;
 960         platform_set_drvdata(pdev, data);
 961         mutex_init(&data->lock);
 962
 963         ret = exynos_tmu_initialize(pdev);
 964         if (ret) {
 965                 dev_err(&pdev->dev, "Failed to initialize TMU\n");
 966                 goto err_clk;
 967         }
 968
 969         exynos_tmu_control(pdev, true);
 970
 971         /* Register the sensor with thermal management interface */
 972         (&exynos_sensor_conf)->private_data = data;
 973         exynos_sensor_conf.trip_data.trip_count = pdata->trigger_level0_en +
 974                         pdata->trigger_level1_en + pdata->trigger_level2_en +
 975                         pdata->trigger_level3_en;
 976
 977         for (i = 0; i < exynos_sensor_conf.trip_data.trip_count; i++)
 978                 exynos_sensor_conf.trip_data.trip_val[i] =
 979                         pdata->threshold + pdata->trigger_levels[i];
 980
 981         exynos_sensor_conf.trip_data.trigger_falling = pdata->threshold_falling;
 982
 983         exynos_sensor_conf.cooling_data.freq_clip_count =
 984                                                 pdata->freq_tab_count;
 985         for (i = 0; i < pdata->freq_tab_count; i++) {
 986                 exynos_sensor_conf.cooling_data.freq_data[i].freq_clip_max =
 987                                         pdata->freq_tab[i].freq_clip_max;
 988                 exynos_sensor_conf.cooling_data.freq_data[i].temp_level =
 989                                         pdata->freq_tab[i].temp_level;
 990         }
 991
 992         ret = exynos_register_thermal(&exynos_sensor_conf);
 993         if (ret) {
 994                 dev_err(&pdev->dev, "Failed to register thermal interface\n");
 995                 goto err_clk;
 996         }
 997
 998         return 0;
 999 err_clk:
1000         clk_unprepare(data->clk);
1001         return ret;
1002 }
1003
1004 static int exynos_tmu_remove(struct platform_device *pdev)
1005 {
1006         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
1007
1008         exynos_tmu_control(pdev, false);
1009
1010         exynos_unregister_thermal();
1011
1012         clk_unprepare(data->clk);
1013
1014         return 0;
1015 }
1016
1017 #ifdef CONFIG_PM_SLEEP
1018 static int exynos_tmu_suspend(struct device *dev)
1019 {
1020         exynos_tmu_control(to_platform_device(dev), false);
1021
1022         return 0;
1023 }
1024
1025 static int exynos_tmu_resume(struct device *dev)
1026 {
1027         struct platform_device *pdev = to_platform_device(dev);
1028
1029         exynos_tmu_initialize(pdev);
1030         exynos_tmu_control(pdev, true);
1031
1032         return 0;
1033 }
1034
1035 static SIMPLE_DEV_PM_OPS(exynos_tmu_pm,
1036                          exynos_tmu_suspend, exynos_tmu_resume);
1037 #define EXYNOS_TMU_PM   (&exynos_tmu_pm)
1038 #else
1039 #define EXYNOS_TMU_PM   NULL
1040 #endif
1041
1042 static struct platform_driver exynos_tmu_driver = {
1043         .driver = {
1044                 .name   = "exynos-tmu",
1045                 .owner  = THIS_MODULE,
1046                 .pm     = EXYNOS_TMU_PM,
1047                 .of_match_table = of_match_ptr(exynos_tmu_match),
1048         },
1049         .probe = exynos_tmu_probe,
1050         .remove = exynos_tmu_remove,
1051         .id_table = exynos_tmu_driver_ids,
1052 };
1053
1054 module_platform_driver(exynos_tmu_driver);
1055
1056 MODULE_DESCRIPTION("EXYNOS TMU Driver");
1057 MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
1058 MODULE_LICENSE("GPL");
1059 MODULE_ALIAS("platform:exynos-tmu");