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