Jacob Pan | 94f6996 | 2013-10-14 16:02:27 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * sysfs.c sysfs ABI access functions for TMON program |
| 3 | * |
| 4 | * Copyright (C) 2013 Intel Corporation. All rights reserved. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License version |
| 8 | * 2 or later as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * Author: Jacob Pan <jacob.jun.pan@linux.intel.com> |
| 16 | * |
| 17 | */ |
| 18 | #include <unistd.h> |
| 19 | #include <stdio.h> |
| 20 | #include <stdlib.h> |
| 21 | #include <string.h> |
| 22 | #include <stdint.h> |
| 23 | #include <dirent.h> |
| 24 | #include <libintl.h> |
| 25 | #include <ctype.h> |
| 26 | #include <time.h> |
| 27 | #include <syslog.h> |
| 28 | #include <sys/time.h> |
| 29 | #include <errno.h> |
| 30 | |
| 31 | #include "tmon.h" |
| 32 | |
| 33 | struct tmon_platform_data ptdata; |
| 34 | const char *trip_type_name[] = { |
| 35 | "critical", |
| 36 | "hot", |
| 37 | "passive", |
| 38 | "active", |
| 39 | }; |
| 40 | |
| 41 | int sysfs_set_ulong(char *path, char *filename, unsigned long val) |
| 42 | { |
| 43 | FILE *fd; |
| 44 | int ret = -1; |
| 45 | char filepath[256]; |
| 46 | |
| 47 | snprintf(filepath, 256, "%s/%s", path, filename); |
| 48 | |
| 49 | fd = fopen(filepath, "w"); |
| 50 | if (!fd) { |
| 51 | syslog(LOG_ERR, "Err: open %s: %s\n", __func__, filepath); |
| 52 | return ret; |
| 53 | } |
| 54 | ret = fprintf(fd, "%lu", val); |
| 55 | fclose(fd); |
| 56 | |
| 57 | return 0; |
| 58 | } |
| 59 | |
| 60 | /* history of thermal data, used for control algo */ |
| 61 | #define NR_THERMAL_RECORDS 3 |
| 62 | struct thermal_data_record trec[NR_THERMAL_RECORDS]; |
| 63 | int cur_thermal_record; /* index to the trec array */ |
| 64 | |
| 65 | static int sysfs_get_ulong(char *path, char *filename, unsigned long *p_ulong) |
| 66 | { |
| 67 | FILE *fd; |
| 68 | int ret = -1; |
| 69 | char filepath[256]; |
| 70 | |
| 71 | snprintf(filepath, 256, "%s/%s", path, filename); |
| 72 | |
| 73 | fd = fopen(filepath, "r"); |
| 74 | if (!fd) { |
| 75 | syslog(LOG_ERR, "Err: open %s: %s\n", __func__, filepath); |
| 76 | return ret; |
| 77 | } |
| 78 | ret = fscanf(fd, "%lu", p_ulong); |
| 79 | fclose(fd); |
| 80 | |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | static int sysfs_get_string(char *path, char *filename, char *str) |
| 85 | { |
| 86 | FILE *fd; |
| 87 | int ret = -1; |
| 88 | char filepath[256]; |
| 89 | |
| 90 | snprintf(filepath, 256, "%s/%s", path, filename); |
| 91 | |
| 92 | fd = fopen(filepath, "r"); |
| 93 | if (!fd) { |
| 94 | syslog(LOG_ERR, "Err: open %s: %s\n", __func__, filepath); |
| 95 | return ret; |
| 96 | } |
| 97 | ret = fscanf(fd, "%256s", str); |
| 98 | fclose(fd); |
| 99 | |
| 100 | return ret; |
| 101 | } |
| 102 | |
| 103 | /* get states of the cooling device instance */ |
| 104 | static int probe_cdev(struct cdev_info *cdi, char *path) |
| 105 | { |
| 106 | sysfs_get_string(path, "type", cdi->type); |
| 107 | sysfs_get_ulong(path, "max_state", &cdi->max_state); |
| 108 | sysfs_get_ulong(path, "cur_state", &cdi->cur_state); |
| 109 | |
| 110 | syslog(LOG_INFO, "%s: %s: type %s, max %lu, curr %lu inst %d\n", |
| 111 | __func__, path, |
| 112 | cdi->type, cdi->max_state, cdi->cur_state, cdi->instance); |
| 113 | |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | static int str_to_trip_type(char *name) |
| 118 | { |
| 119 | int i; |
| 120 | |
| 121 | for (i = 0; i < NR_THERMAL_TRIP_TYPE; i++) { |
| 122 | if (!strcmp(name, trip_type_name[i])) |
| 123 | return i; |
| 124 | } |
| 125 | |
| 126 | return -ENOENT; |
| 127 | } |
| 128 | |
| 129 | /* scan and fill in trip point info for a thermal zone and trip point id */ |
| 130 | static int get_trip_point_data(char *tz_path, int tzid, int tpid) |
| 131 | { |
| 132 | char filename[256]; |
| 133 | char temp_str[256]; |
| 134 | int trip_type; |
| 135 | |
| 136 | if (tpid >= MAX_NR_TRIP) |
| 137 | return -EINVAL; |
| 138 | /* check trip point type */ |
| 139 | snprintf(filename, sizeof(filename), "trip_point_%d_type", tpid); |
| 140 | sysfs_get_string(tz_path, filename, temp_str); |
| 141 | trip_type = str_to_trip_type(temp_str); |
| 142 | if (trip_type < 0) { |
| 143 | syslog(LOG_ERR, "%s:%s no matching type\n", __func__, temp_str); |
| 144 | return -ENOENT; |
| 145 | } |
| 146 | ptdata.tzi[tzid].tp[tpid].type = trip_type; |
| 147 | syslog(LOG_INFO, "%s:tz:%d tp:%d:type:%s type id %d\n", __func__, tzid, |
| 148 | tpid, temp_str, trip_type); |
| 149 | |
| 150 | /* TODO: check attribute */ |
| 151 | |
| 152 | return 0; |
| 153 | } |
| 154 | |
| 155 | /* return instance id for file format such as trip_point_4_temp */ |
| 156 | static int get_instance_id(char *name, int pos, int skip) |
| 157 | { |
| 158 | char *ch; |
| 159 | int i = 0; |
| 160 | |
| 161 | ch = strtok(name, "_"); |
| 162 | while (ch != NULL) { |
| 163 | ++i; |
| 164 | syslog(LOG_INFO, "%s:%s:%s:%d", __func__, name, ch, i); |
| 165 | ch = strtok(NULL, "_"); |
| 166 | if (pos == i) |
| 167 | return atol(ch + skip); |
| 168 | } |
| 169 | |
| 170 | return -1; |
| 171 | } |
| 172 | |
| 173 | /* Find trip point info of a thermal zone */ |
| 174 | static int find_tzone_tp(char *tz_name, char *d_name, struct tz_info *tzi, |
| 175 | int tz_id) |
| 176 | { |
| 177 | int tp_id; |
| 178 | unsigned long temp_ulong; |
| 179 | |
| 180 | if (strstr(d_name, "trip_point") && |
| 181 | strstr(d_name, "temp")) { |
| 182 | /* check if trip point temp is non-zero |
| 183 | * ignore 0/invalid trip points |
| 184 | */ |
| 185 | sysfs_get_ulong(tz_name, d_name, &temp_ulong); |
| 186 | if (temp_ulong < MAX_TEMP_KC) { |
| 187 | tzi->nr_trip_pts++; |
| 188 | /* found a valid trip point */ |
| 189 | tp_id = get_instance_id(d_name, 2, 0); |
| 190 | syslog(LOG_DEBUG, "tzone %s trip %d temp %lu tpnode %s", |
| 191 | tz_name, tp_id, temp_ulong, d_name); |
| 192 | if (tp_id < 0 || tp_id >= MAX_NR_TRIP) { |
| 193 | syslog(LOG_ERR, "Failed to find TP inst %s\n", |
| 194 | d_name); |
| 195 | return -1; |
| 196 | } |
| 197 | get_trip_point_data(tz_name, tz_id, tp_id); |
| 198 | tzi->tp[tp_id].temp = temp_ulong; |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | /* check cooling devices for binding info. */ |
| 206 | static int find_tzone_cdev(struct dirent *nl, char *tz_name, |
| 207 | struct tz_info *tzi, int tz_id, int cid) |
| 208 | { |
| 209 | unsigned long trip_instance = 0; |
| 210 | char cdev_name_linked[256]; |
| 211 | char cdev_name[256]; |
| 212 | char cdev_trip_name[256]; |
| 213 | int cdev_id; |
| 214 | |
| 215 | if (nl->d_type == DT_LNK) { |
| 216 | syslog(LOG_DEBUG, "TZ%d: cdev: %s cid %d\n", tz_id, nl->d_name, |
| 217 | cid); |
| 218 | tzi->nr_cdev++; |
| 219 | if (tzi->nr_cdev > ptdata.nr_cooling_dev) { |
| 220 | syslog(LOG_ERR, "Err: Too many cdev? %d\n", |
| 221 | tzi->nr_cdev); |
| 222 | return -EINVAL; |
| 223 | } |
| 224 | /* find the link to real cooling device record binding */ |
| 225 | snprintf(cdev_name, 256, "%s/%s", tz_name, nl->d_name); |
| 226 | memset(cdev_name_linked, 0, sizeof(cdev_name_linked)); |
| 227 | if (readlink(cdev_name, cdev_name_linked, |
| 228 | sizeof(cdev_name_linked) - 1) != -1) { |
| 229 | cdev_id = get_instance_id(cdev_name_linked, 1, |
| 230 | sizeof("device") - 1); |
| 231 | syslog(LOG_DEBUG, "cdev %s linked to %s : %d\n", |
| 232 | cdev_name, cdev_name_linked, cdev_id); |
| 233 | tzi->cdev_binding |= (1 << cdev_id); |
| 234 | |
| 235 | /* find the trip point in which the cdev is binded to |
| 236 | * in this tzone |
| 237 | */ |
| 238 | snprintf(cdev_trip_name, 256, "%s%s", nl->d_name, |
| 239 | "_trip_point"); |
| 240 | sysfs_get_ulong(tz_name, cdev_trip_name, |
| 241 | &trip_instance); |
| 242 | /* validate trip point range, e.g. trip could return -1 |
| 243 | * when passive is enabled |
| 244 | */ |
| 245 | if (trip_instance > MAX_NR_TRIP) |
| 246 | trip_instance = 0; |
| 247 | tzi->trip_binding[cdev_id] |= 1 << trip_instance; |
| 248 | syslog(LOG_DEBUG, "cdev %s -> trip:%lu: 0x%lx %d\n", |
| 249 | cdev_name, trip_instance, |
| 250 | tzi->trip_binding[cdev_id], |
| 251 | cdev_id); |
| 252 | |
| 253 | |
| 254 | } |
| 255 | return 0; |
| 256 | } |
| 257 | |
| 258 | return -ENODEV; |
| 259 | } |
| 260 | |
| 261 | |
| 262 | |
| 263 | /***************************************************************************** |
| 264 | * Before calling scan_tzones, thermal sysfs must be probed to determine |
| 265 | * the number of thermal zones and cooling devices. |
| 266 | * We loop through each thermal zone and fill in tz_info struct, i.e. |
| 267 | * ptdata.tzi[] |
| 268 | root@jacob-chiefriver:~# tree -d /sys/class/thermal/thermal_zone0 |
| 269 | /sys/class/thermal/thermal_zone0 |
| 270 | |-- cdev0 -> ../cooling_device4 |
| 271 | |-- cdev1 -> ../cooling_device3 |
| 272 | |-- cdev10 -> ../cooling_device7 |
| 273 | |-- cdev11 -> ../cooling_device6 |
| 274 | |-- cdev12 -> ../cooling_device5 |
| 275 | |-- cdev2 -> ../cooling_device2 |
| 276 | |-- cdev3 -> ../cooling_device1 |
| 277 | |-- cdev4 -> ../cooling_device0 |
| 278 | |-- cdev5 -> ../cooling_device12 |
| 279 | |-- cdev6 -> ../cooling_device11 |
| 280 | |-- cdev7 -> ../cooling_device10 |
| 281 | |-- cdev8 -> ../cooling_device9 |
| 282 | |-- cdev9 -> ../cooling_device8 |
| 283 | |-- device -> ../../../LNXSYSTM:00/device:62/LNXTHERM:00 |
| 284 | |-- power |
| 285 | `-- subsystem -> ../../../../class/thermal |
| 286 | *****************************************************************************/ |
| 287 | static int scan_tzones(void) |
| 288 | { |
| 289 | DIR *dir; |
| 290 | struct dirent **namelist; |
| 291 | char tz_name[256]; |
| 292 | int i, j, n, k = 0; |
| 293 | |
| 294 | if (!ptdata.nr_tz_sensor) |
| 295 | return -1; |
| 296 | |
| 297 | for (i = 0; i <= ptdata.max_tz_instance; i++) { |
| 298 | memset(tz_name, 0, sizeof(tz_name)); |
| 299 | snprintf(tz_name, 256, "%s/%s%d", THERMAL_SYSFS, TZONE, i); |
| 300 | |
| 301 | dir = opendir(tz_name); |
| 302 | if (!dir) { |
| 303 | syslog(LOG_INFO, "Thermal zone %s skipped\n", tz_name); |
| 304 | continue; |
| 305 | } |
| 306 | /* keep track of valid tzones */ |
| 307 | n = scandir(tz_name, &namelist, 0, alphasort); |
| 308 | if (n < 0) |
| 309 | syslog(LOG_ERR, "scandir failed in %s", tz_name); |
| 310 | else { |
| 311 | sysfs_get_string(tz_name, "type", ptdata.tzi[k].type); |
| 312 | ptdata.tzi[k].instance = i; |
| 313 | /* detect trip points and cdev attached to this tzone */ |
| 314 | j = 0; /* index for cdev */ |
| 315 | ptdata.tzi[k].nr_cdev = 0; |
| 316 | ptdata.tzi[k].nr_trip_pts = 0; |
| 317 | while (n--) { |
| 318 | char *temp_str; |
| 319 | |
| 320 | if (find_tzone_tp(tz_name, namelist[n]->d_name, |
| 321 | &ptdata.tzi[k], k)) |
| 322 | break; |
| 323 | temp_str = strstr(namelist[n]->d_name, "cdev"); |
| 324 | if (!temp_str) { |
| 325 | free(namelist[n]); |
| 326 | continue; |
| 327 | } |
| 328 | if (!find_tzone_cdev(namelist[n], tz_name, |
| 329 | &ptdata.tzi[k], i, j)) |
| 330 | j++; /* increment cdev index */ |
| 331 | free(namelist[n]); |
| 332 | } |
| 333 | free(namelist); |
| 334 | } |
| 335 | /*TODO: reverse trip points */ |
| 336 | closedir(dir); |
| 337 | syslog(LOG_INFO, "TZ %d has %d cdev\n", i, |
| 338 | ptdata.tzi[k].nr_cdev); |
| 339 | k++; |
| 340 | } |
| 341 | |
| 342 | return 0; |
| 343 | } |
| 344 | |
| 345 | static int scan_cdevs(void) |
| 346 | { |
| 347 | DIR *dir; |
| 348 | struct dirent **namelist; |
| 349 | char cdev_name[256]; |
| 350 | int i, n, k = 0; |
| 351 | |
| 352 | if (!ptdata.nr_cooling_dev) { |
| 353 | fprintf(stderr, "No cooling devices found\n"); |
| 354 | return 0; |
| 355 | } |
| 356 | for (i = 0; i <= ptdata.max_cdev_instance; i++) { |
| 357 | memset(cdev_name, 0, sizeof(cdev_name)); |
| 358 | snprintf(cdev_name, 256, "%s/%s%d", THERMAL_SYSFS, CDEV, i); |
| 359 | |
| 360 | dir = opendir(cdev_name); |
| 361 | if (!dir) { |
| 362 | syslog(LOG_INFO, "Cooling dev %s skipped\n", cdev_name); |
| 363 | /* there is a gap in cooling device id, check again |
| 364 | * for the same index. |
| 365 | */ |
| 366 | continue; |
| 367 | } |
| 368 | |
| 369 | n = scandir(cdev_name, &namelist, 0, alphasort); |
| 370 | if (n < 0) |
| 371 | syslog(LOG_ERR, "scandir failed in %s", cdev_name); |
| 372 | else { |
| 373 | sysfs_get_string(cdev_name, "type", ptdata.cdi[k].type); |
| 374 | ptdata.cdi[k].instance = i; |
| 375 | if (strstr(ptdata.cdi[k].type, ctrl_cdev)) { |
| 376 | ptdata.cdi[k].flag |= CDEV_FLAG_IN_CONTROL; |
| 377 | syslog(LOG_DEBUG, "control cdev id %d\n", i); |
| 378 | } |
| 379 | while (n--) |
| 380 | free(namelist[n]); |
| 381 | free(namelist); |
| 382 | } |
| 383 | closedir(dir); |
| 384 | k++; |
| 385 | } |
| 386 | return 0; |
| 387 | } |
| 388 | |
| 389 | |
| 390 | int probe_thermal_sysfs(void) |
| 391 | { |
| 392 | DIR *dir; |
| 393 | struct dirent **namelist; |
| 394 | int n; |
| 395 | |
| 396 | dir = opendir(THERMAL_SYSFS); |
| 397 | if (!dir) { |
| 398 | fprintf(stderr, "\nNo thermal sysfs, exit\n"); |
| 399 | return -1; |
| 400 | } |
| 401 | n = scandir(THERMAL_SYSFS, &namelist, 0, alphasort); |
| 402 | if (n < 0) |
| 403 | syslog(LOG_ERR, "scandir failed in thermal sysfs"); |
| 404 | else { |
| 405 | /* detect number of thermal zones and cooling devices */ |
| 406 | while (n--) { |
| 407 | int inst; |
| 408 | |
| 409 | if (strstr(namelist[n]->d_name, CDEV)) { |
| 410 | inst = get_instance_id(namelist[n]->d_name, 1, |
| 411 | sizeof("device") - 1); |
| 412 | /* keep track of the max cooling device since |
| 413 | * there may be gaps. |
| 414 | */ |
| 415 | if (inst > ptdata.max_cdev_instance) |
| 416 | ptdata.max_cdev_instance = inst; |
| 417 | |
| 418 | syslog(LOG_DEBUG, "found cdev: %s %d %d\n", |
| 419 | namelist[n]->d_name, |
| 420 | ptdata.nr_cooling_dev, |
| 421 | ptdata.max_cdev_instance); |
| 422 | ptdata.nr_cooling_dev++; |
| 423 | } else if (strstr(namelist[n]->d_name, TZONE)) { |
| 424 | inst = get_instance_id(namelist[n]->d_name, 1, |
| 425 | sizeof("zone") - 1); |
| 426 | if (inst > ptdata.max_tz_instance) |
| 427 | ptdata.max_tz_instance = inst; |
| 428 | |
| 429 | syslog(LOG_DEBUG, "found tzone: %s %d %d\n", |
| 430 | namelist[n]->d_name, |
| 431 | ptdata.nr_tz_sensor, |
| 432 | ptdata.max_tz_instance); |
| 433 | ptdata.nr_tz_sensor++; |
| 434 | } |
| 435 | free(namelist[n]); |
| 436 | } |
| 437 | free(namelist); |
| 438 | } |
| 439 | syslog(LOG_INFO, "found %d tzone(s), %d cdev(s), target zone %d\n", |
| 440 | ptdata.nr_tz_sensor, ptdata.nr_cooling_dev, |
| 441 | target_thermal_zone); |
| 442 | closedir(dir); |
| 443 | |
| 444 | if (!ptdata.nr_tz_sensor) { |
| 445 | fprintf(stderr, "\nNo thermal zones found, exit\n\n"); |
| 446 | return -1; |
| 447 | } |
| 448 | |
| 449 | ptdata.tzi = calloc(sizeof(struct tz_info), ptdata.max_tz_instance+1); |
| 450 | if (!ptdata.tzi) { |
| 451 | fprintf(stderr, "Err: allocate tz_info\n"); |
| 452 | return -1; |
| 453 | } |
| 454 | |
| 455 | /* we still show thermal zone information if there is no cdev */ |
| 456 | if (ptdata.nr_cooling_dev) { |
| 457 | ptdata.cdi = calloc(sizeof(struct cdev_info), |
| 458 | ptdata.max_cdev_instance + 1); |
| 459 | if (!ptdata.cdi) { |
| 460 | free(ptdata.tzi); |
| 461 | fprintf(stderr, "Err: allocate cdev_info\n"); |
| 462 | return -1; |
| 463 | } |
| 464 | } |
| 465 | |
| 466 | /* now probe tzones */ |
| 467 | if (scan_tzones()) |
| 468 | return -1; |
| 469 | if (scan_cdevs()) |
| 470 | return -1; |
| 471 | return 0; |
| 472 | } |
| 473 | |
| 474 | /* convert sysfs zone instance to zone array index */ |
| 475 | int zone_instance_to_index(int zone_inst) |
| 476 | { |
| 477 | int i; |
| 478 | |
| 479 | for (i = 0; i < ptdata.nr_tz_sensor; i++) |
| 480 | if (ptdata.tzi[i].instance == zone_inst) |
| 481 | return i; |
| 482 | return -ENOENT; |
| 483 | } |
| 484 | |
| 485 | /* read temperature of all thermal zones */ |
| 486 | int update_thermal_data() |
| 487 | { |
| 488 | int i; |
| 489 | char tz_name[256]; |
| 490 | static unsigned long samples; |
| 491 | |
| 492 | if (!ptdata.nr_tz_sensor) { |
| 493 | syslog(LOG_ERR, "No thermal zones found!\n"); |
| 494 | return -1; |
| 495 | } |
| 496 | |
| 497 | /* circular buffer for keeping historic data */ |
| 498 | if (cur_thermal_record >= NR_THERMAL_RECORDS) |
| 499 | cur_thermal_record = 0; |
| 500 | gettimeofday(&trec[cur_thermal_record].tv, NULL); |
| 501 | if (tmon_log) { |
| 502 | fprintf(tmon_log, "%lu ", ++samples); |
| 503 | fprintf(tmon_log, "%3.1f ", p_param.t_target); |
| 504 | } |
| 505 | for (i = 0; i < ptdata.nr_tz_sensor; i++) { |
| 506 | memset(tz_name, 0, sizeof(tz_name)); |
| 507 | snprintf(tz_name, 256, "%s/%s%d", THERMAL_SYSFS, TZONE, |
| 508 | ptdata.tzi[i].instance); |
| 509 | sysfs_get_ulong(tz_name, "temp", |
| 510 | &trec[cur_thermal_record].temp[i]); |
| 511 | if (tmon_log) |
| 512 | fprintf(tmon_log, "%lu ", |
| 513 | trec[cur_thermal_record].temp[i]/1000); |
| 514 | } |
| 515 | for (i = 0; i < ptdata.nr_cooling_dev; i++) { |
| 516 | char cdev_name[256]; |
| 517 | unsigned long val; |
| 518 | |
| 519 | snprintf(cdev_name, 256, "%s/%s%d", THERMAL_SYSFS, CDEV, |
| 520 | ptdata.cdi[i].instance); |
| 521 | probe_cdev(&ptdata.cdi[i], cdev_name); |
| 522 | val = ptdata.cdi[i].cur_state; |
| 523 | if (val > 1000000) |
| 524 | val = 0; |
| 525 | if (tmon_log) |
| 526 | fprintf(tmon_log, "%lu ", val); |
| 527 | } |
| 528 | |
| 529 | if (tmon_log) { |
| 530 | fprintf(tmon_log, "\n"); |
| 531 | fflush(tmon_log); |
| 532 | } |
| 533 | |
| 534 | return 0; |
| 535 | } |
| 536 | |
| 537 | void set_ctrl_state(unsigned long state) |
| 538 | { |
| 539 | char ctrl_cdev_path[256]; |
| 540 | int i; |
| 541 | unsigned long cdev_state; |
| 542 | |
| 543 | if (no_control) |
| 544 | return; |
| 545 | /* set all ctrl cdev to the same state */ |
| 546 | for (i = 0; i < ptdata.nr_cooling_dev; i++) { |
| 547 | if (ptdata.cdi[i].flag & CDEV_FLAG_IN_CONTROL) { |
| 548 | if (ptdata.cdi[i].max_state < 10) { |
| 549 | strcpy(ctrl_cdev, "None."); |
| 550 | return; |
| 551 | } |
| 552 | /* scale to percentage of max_state */ |
| 553 | cdev_state = state * ptdata.cdi[i].max_state/100; |
| 554 | syslog(LOG_DEBUG, |
| 555 | "ctrl cdev %d set state %lu scaled to %lu\n", |
| 556 | ptdata.cdi[i].instance, state, cdev_state); |
| 557 | snprintf(ctrl_cdev_path, 256, "%s/%s%d", THERMAL_SYSFS, |
| 558 | CDEV, ptdata.cdi[i].instance); |
| 559 | syslog(LOG_DEBUG, "ctrl cdev path %s", ctrl_cdev_path); |
| 560 | sysfs_set_ulong(ctrl_cdev_path, "cur_state", |
| 561 | cdev_state); |
| 562 | } |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | void get_ctrl_state(unsigned long *state) |
| 567 | { |
| 568 | char ctrl_cdev_path[256]; |
| 569 | int ctrl_cdev_id = -1; |
| 570 | int i; |
| 571 | |
| 572 | /* TODO: take average of all ctrl types. also consider change based on |
| 573 | * uevent. Take the first reading for now. |
| 574 | */ |
| 575 | for (i = 0; i < ptdata.nr_cooling_dev; i++) { |
| 576 | if (ptdata.cdi[i].flag & CDEV_FLAG_IN_CONTROL) { |
| 577 | ctrl_cdev_id = ptdata.cdi[i].instance; |
| 578 | syslog(LOG_INFO, "ctrl cdev %d get state\n", |
| 579 | ptdata.cdi[i].instance); |
| 580 | break; |
| 581 | } |
| 582 | } |
| 583 | if (ctrl_cdev_id == -1) { |
| 584 | *state = 0; |
| 585 | return; |
| 586 | } |
| 587 | snprintf(ctrl_cdev_path, 256, "%s/%s%d", THERMAL_SYSFS, |
| 588 | CDEV, ctrl_cdev_id); |
| 589 | sysfs_get_ulong(ctrl_cdev_path, "cur_state", state); |
| 590 | } |
| 591 | |
| 592 | void free_thermal_data(void) |
| 593 | { |
| 594 | free(ptdata.tzi); |
| 595 | free(ptdata.cdi); |
| 596 | } |