arch/ppc/platforms/proc_rtas.c

   1 /*
   2  *   arch/ppc/platforms/proc_rtas.c
   3  *   Copyright (C) 2000 Tilmann Bitterberg
   4  *   (tilmann@bitterberg.de)
   5  *
   6  *   RTAS (Runtime Abstraction Services) stuff
   7  *   Intention is to provide a clean user interface
   8  *   to use the RTAS.
   9  *
  10  *   TODO:
  11  *   Split off a header file and maybe move it to a different
  12  *   location. Write Documentation on what the /proc/rtas/ entries
  13  *   actually do.
  14  */
  15
  16 #include <linux/errno.h>
  17 #include <linux/sched.h>
  18 #include <linux/proc_fs.h>
  19 #include <linux/stat.h>
  20 #include <linux/ctype.h>
  21 #include <linux/time.h>
  22 #include <linux/string.h>
  23 #include <linux/init.h>
  24
  25 #include <asm/uaccess.h>
  26 #include <asm/bitops.h>
  27 #include <asm/processor.h>
  28 #include <asm/io.h>
  29 #include <asm/prom.h>
  30 #include <asm/machdep.h> /* for ppc_md */
  31 #include <asm/time.h>
  32
  33 /* Token for Sensors */
  34 #define KEY_SWITCH              0x0001
  35 #define ENCLOSURE_SWITCH        0x0002
  36 #define THERMAL_SENSOR          0x0003
  37 #define LID_STATUS              0x0004
  38 #define POWER_SOURCE            0x0005
  39 #define BATTERY_VOLTAGE         0x0006
  40 #define BATTERY_REMAINING       0x0007
  41 #define BATTERY_PERCENTAGE      0x0008
  42 #define EPOW_SENSOR             0x0009
  43 #define BATTERY_CYCLESTATE      0x000a
  44 #define BATTERY_CHARGING        0x000b
  45
  46 /* IBM specific sensors */
  47 #define IBM_SURVEILLANCE        0x2328 /* 9000 */
  48 #define IBM_FANRPM              0x2329 /* 9001 */
  49 #define IBM_VOLTAGE             0x232a /* 9002 */
  50 #define IBM_DRCONNECTOR         0x232b /* 9003 */
  51 #define IBM_POWERSUPPLY         0x232c /* 9004 */
  52 #define IBM_INTQUEUE            0x232d /* 9005 */
  53
  54 /* Status return values */
  55 #define SENSOR_CRITICAL_HIGH    13
  56 #define SENSOR_WARNING_HIGH     12
  57 #define SENSOR_NORMAL           11
  58 #define SENSOR_WARNING_LOW      10
  59 #define SENSOR_CRITICAL_LOW      9
  60 #define SENSOR_SUCCESS           0
  61 #define SENSOR_HW_ERROR         -1
  62 #define SENSOR_BUSY             -2
  63 #define SENSOR_NOT_EXIST        -3
  64 #define SENSOR_DR_ENTITY        -9000
  65
  66 /* Location Codes */
  67 #define LOC_SCSI_DEV_ADDR       'A'
  68 #define LOC_SCSI_DEV_LOC        'B'
  69 #define LOC_CPU                 'C'
  70 #define LOC_DISKETTE            'D'
  71 #define LOC_ETHERNET            'E'
  72 #define LOC_FAN                 'F'
  73 #define LOC_GRAPHICS            'G'
  74 /* reserved / not used          'H' */
  75 #define LOC_IO_ADAPTER          'I'
  76 /* reserved / not used          'J' */
  77 #define LOC_KEYBOARD            'K'
  78 #define LOC_LCD                 'L'
  79 #define LOC_MEMORY              'M'
  80 #define LOC_NV_MEMORY           'N'
  81 #define LOC_MOUSE               'O'
  82 #define LOC_PLANAR              'P'
  83 #define LOC_OTHER_IO            'Q'
  84 #define LOC_PARALLEL            'R'
  85 #define LOC_SERIAL              'S'
  86 #define LOC_DEAD_RING           'T'
  87 #define LOC_RACKMOUNTED         'U' /* for _u_nit is rack mounted */
  88 #define LOC_VOLTAGE             'V'
  89 #define LOC_SWITCH_ADAPTER      'W'
  90 #define LOC_OTHER               'X'
  91 #define LOC_FIRMWARE            'Y'
  92 #define LOC_SCSI                'Z'
  93
  94 /* Tokens for indicators */
  95 #define TONE_FREQUENCY          0x0001 /* 0 - 1000 (HZ)*/
  96 #define TONE_VOLUME             0x0002 /* 0 - 100 (%) */
  97 #define SYSTEM_POWER_STATE      0x0003
  98 #define WARNING_LIGHT           0x0004
  99 #define DISK_ACTIVITY_LIGHT     0x0005
 100 #define HEX_DISPLAY_UNIT        0x0006
 101 #define BATTERY_WARNING_TIME    0x0007
 102 #define CONDITION_CYCLE_REQUEST 0x0008
 103 #define SURVEILLANCE_INDICATOR  0x2328 /* 9000 */
 104 #define DR_ACTION               0x2329 /* 9001 */
 105 #define DR_INDICATOR            0x232a /* 9002 */
 106 /* 9003 - 9004: Vendor specific */
 107 #define GLOBAL_INTERRUPT_QUEUE  0x232d /* 9005 */
 108 /* 9006 - 9999: Vendor specific */
 109
 110 /* other */
 111 #define MAX_SENSORS              17  /* I only know of 17 sensors */
 112 #define MAX_LINELENGTH          256
 113 #define SENSOR_PREFIX           "ibm,sensor-"
 114 #define cel_to_fahr(x)          ((x*9/5)+32)
 115
 116
 117 /* Globals */
 118 static struct proc_dir_entry *proc_rtas;
 119 static struct rtas_sensors sensors;
 120 static struct device_node *rtas;
 121 static unsigned long power_on_time = 0; /* Save the time the user set */
 122 static char progress_led[MAX_LINELENGTH];
 123
 124 static unsigned long rtas_tone_frequency = 1000;
 125 static unsigned long rtas_tone_volume = 0;
 126
 127 /* ****************STRUCTS******************************************* */
 128 struct individual_sensor {
 129         unsigned int token;
 130         unsigned int quant;
 131 };
 132
 133 struct rtas_sensors {
 134         struct individual_sensor sensor[MAX_SENSORS];
 135         unsigned int quant;
 136 };
 137
 138 /* ****************************************************************** */
 139 /* Declarations */
 140 static int ppc_rtas_sensor_read(char * buf, char ** start, off_t off,
 141                 int count, int *eof, void *data);
 142 static ssize_t ppc_rtas_clock_read(struct file * file, char * buf,
 143                 size_t count, loff_t *ppos);
 144 static ssize_t ppc_rtas_clock_write(struct file * file, const char * buf,
 145                 size_t count, loff_t *ppos);
 146 static ssize_t ppc_rtas_progress_read(struct file * file, char * buf,
 147                 size_t count, loff_t *ppos);
 148 static ssize_t ppc_rtas_progress_write(struct file * file, const char * buf,
 149                 size_t count, loff_t *ppos);
 150 static ssize_t ppc_rtas_poweron_read(struct file * file, char * buf,
 151                 size_t count, loff_t *ppos);
 152 static ssize_t ppc_rtas_poweron_write(struct file * file, const char * buf,
 153                 size_t count, loff_t *ppos);
 154
 155 static ssize_t ppc_rtas_tone_freq_write(struct file * file, const char * buf,
 156                 size_t count, loff_t *ppos);
 157 static ssize_t ppc_rtas_tone_freq_read(struct file * file, char * buf,
 158                 size_t count, loff_t *ppos);
 159 static ssize_t ppc_rtas_tone_volume_write(struct file * file, const char * buf,
 160                 size_t count, loff_t *ppos);
 161 static ssize_t ppc_rtas_tone_volume_read(struct file * file, char * buf,
 162                 size_t count, loff_t *ppos);
 163
 164 struct file_operations ppc_rtas_poweron_operations = {
 165         .read =         ppc_rtas_poweron_read,
 166         .write =        ppc_rtas_poweron_write
 167 };
 168 struct file_operations ppc_rtas_progress_operations = {
 169         .read =         ppc_rtas_progress_read,
 170         .write =        ppc_rtas_progress_write
 171 };
 172
 173 struct file_operations ppc_rtas_clock_operations = {
 174         .read =         ppc_rtas_clock_read,
 175         .write =        ppc_rtas_clock_write
 176 };
 177
 178 struct file_operations ppc_rtas_tone_freq_operations = {
 179         .read =         ppc_rtas_tone_freq_read,
 180         .write =        ppc_rtas_tone_freq_write
 181 };
 182 struct file_operations ppc_rtas_tone_volume_operations = {
 183         .read =         ppc_rtas_tone_volume_read,
 184         .write =        ppc_rtas_tone_volume_write
 185 };
 186
 187 int ppc_rtas_find_all_sensors (void);
 188 int ppc_rtas_process_sensor(struct individual_sensor s, int state,
 189                 int error, char * buf);
 190 char * ppc_rtas_process_error(int error);
 191 int get_location_code(struct individual_sensor s, char * buf);
 192 int check_location_string (char *c, char * buf);
 193 int check_location (char *c, int idx, char * buf);
 194
 195 /* ****************************************************************** */
 196 /* MAIN                                                               */
 197 /* ****************************************************************** */
 198 static int __init proc_rtas_init(void)
 199 {
 200         struct proc_dir_entry *entry;
 201
 202         rtas = find_devices("rtas");
 203         if ((rtas == 0) || (_machine != _MACH_chrp)) {
 204                 return 1;
 205         }
 206
 207         proc_rtas = proc_mkdir("rtas", 0);
 208         if (proc_rtas == 0)
 209                 return 1;
 210
 211         /* /proc/rtas entries */
 212
 213         entry = create_proc_entry("progress", S_IRUGO|S_IWUSR, proc_rtas);
 214         if (entry) entry->proc_fops = &ppc_rtas_progress_operations;
 215
 216         entry = create_proc_entry("clock", S_IRUGO|S_IWUSR, proc_rtas);
 217         if (entry) entry->proc_fops = &ppc_rtas_clock_operations;
 218
 219         entry = create_proc_entry("poweron", S_IWUSR|S_IRUGO, proc_rtas);
 220         if (entry) entry->proc_fops = &ppc_rtas_poweron_operations;
 221
 222         create_proc_read_entry("sensors", S_IRUGO, proc_rtas,
 223                         ppc_rtas_sensor_read, NULL);
 224
 225         entry = create_proc_entry("frequency", S_IWUSR|S_IRUGO, proc_rtas);
 226         if (entry) entry->proc_fops = &ppc_rtas_tone_freq_operations;
 227
 228         entry = create_proc_entry("volume", S_IWUSR|S_IRUGO, proc_rtas);
 229         if (entry) entry->proc_fops = &ppc_rtas_tone_volume_operations;
 230
 231         return 0;
 232 }
 233 __initcall(proc_rtas_init);
 234
 235 /* ****************************************************************** */
 236 /* POWER-ON-TIME                                                      */
 237 /* ****************************************************************** */
 238 static ssize_t ppc_rtas_poweron_write(struct file * file, const char * buf,
 239                 size_t count, loff_t *ppos)
 240 {
 241         struct rtc_time tm;
 242         unsigned long nowtime;
 243         char *dest;
 244         int error;
 245
 246         nowtime = simple_strtoul(buf, &dest, 10);
 247         if (*dest != '\0' && *dest != '\n') {
 248                 printk("ppc_rtas_poweron_write: Invalid time\n");
 249                 return count;
 250         }
 251         power_on_time = nowtime; /* save the time */
 252
 253         to_tm(nowtime, &tm);
 254
 255         error = call_rtas("set-time-for-power-on", 7, 1, NULL,
 256                         tm.tm_year, tm.tm_mon, tm.tm_mday,
 257                         tm.tm_hour, tm.tm_min, tm.tm_sec, 0 /* nano */);
 258         if (error != 0)
 259                 printk(KERN_WARNING "error: setting poweron time returned: %s\n",
 260                                 ppc_rtas_process_error(error));
 261         return count;
 262 }
 263 /* ****************************************************************** */
 264 static ssize_t ppc_rtas_poweron_read(struct file * file, char * buf,
 265                 size_t count, loff_t *ppos)
 266 {
 267         int n;
 268         if (power_on_time == 0)
 269                 n = sprintf(buf, "Power on time not set\n");
 270         else
 271                 n = sprintf(buf, "%lu\n", power_on_time);
 272
 273         if (*ppos >= strlen(buf))
 274                 return 0;
 275         if (n > strlen(buf) - *ppos)
 276                 n = strlen(buf) - *ppos;
 277         if (n > count)
 278                 n = count;
 279         *ppos += n;
 280         return n;
 281 }
 282
 283 /* ****************************************************************** */
 284 /* PROGRESS                                                           */
 285 /* ****************************************************************** */
 286 static ssize_t ppc_rtas_progress_write(struct file * file, const char * buf,
 287                 size_t count, loff_t *ppos)
 288 {
 289         unsigned long hex;
 290
 291         strcpy(progress_led, buf); /* save the string */
 292         /* Lets see if the user passed hexdigits */
 293         hex = simple_strtoul(buf, NULL, 10);
 294
 295         ppc_md.progress ((char *)buf, hex);
 296         return count;
 297
 298         /* clear the line */ /* ppc_md.progress("                   ", 0xffff);*/
 299 }
 300 /* ****************************************************************** */
 301 static ssize_t ppc_rtas_progress_read(struct file * file, char * buf,
 302                 size_t count, loff_t *ppos)
 303 {
 304         int n = 0;
 305         if (progress_led != NULL)
 306                 n = sprintf (buf, "%s\n", progress_led);
 307         if (*ppos >= strlen(buf))
 308                 return 0;
 309         if (n > strlen(buf) - *ppos)
 310                 n = strlen(buf) - *ppos;
 311         if (n > count)
 312                 n = count;
 313         *ppos += n;
 314         return n;
 315 }
 316
 317 /* ****************************************************************** */
 318 /* CLOCK                                                              */
 319 /* ****************************************************************** */
 320 static ssize_t ppc_rtas_clock_write(struct file * file, const char * buf,
 321                 size_t count, loff_t *ppos)
 322 {
 323         struct rtc_time tm;
 324         unsigned long nowtime;
 325         char *dest;
 326         int error;
 327
 328         nowtime = simple_strtoul(buf, &dest, 10);
 329         if (*dest != '\0' && *dest != '\n') {
 330                 printk("ppc_rtas_clock_write: Invalid time\n");
 331                 return count;
 332         }
 333
 334         to_tm(nowtime, &tm);
 335         error = call_rtas("set-time-of-day", 7, 1, NULL,
 336                         tm.tm_year, tm.tm_mon, tm.tm_mday,
 337                         tm.tm_hour, tm.tm_min, tm.tm_sec, 0);
 338         if (error != 0)
 339                 printk(KERN_WARNING "error: setting the clock returned: %s\n",
 340                                 ppc_rtas_process_error(error));
 341         return count;
 342 }
 343 /* ****************************************************************** */
 344 static ssize_t ppc_rtas_clock_read(struct file * file, char * buf,
 345                 size_t count, loff_t *ppos)
 346 {
 347         unsigned int year, mon, day, hour, min, sec;
 348         unsigned long *ret = kmalloc(4*8, GFP_KERNEL);
 349         int n, error;
 350
 351         error = call_rtas("get-time-of-day", 0, 8, ret);
 352
 353         year = ret[0]; mon  = ret[1]; day  = ret[2];
 354         hour = ret[3]; min  = ret[4]; sec  = ret[5];
 355
 356         if (error != 0){
 357                 printk(KERN_WARNING "error: reading the clock returned: %s\n",
 358                                 ppc_rtas_process_error(error));
 359                 n = sprintf (buf, "0");
 360         } else {
 361                 n = sprintf (buf, "%lu\n", mktime(year, mon, day, hour, min, sec));
 362         }
 363         kfree(ret);
 364
 365         if (*ppos >= strlen(buf))
 366                 return 0;
 367         if (n > strlen(buf) - *ppos)
 368                 n = strlen(buf) - *ppos;
 369         if (n > count)
 370                 n = count;
 371         *ppos += n;
 372         return n;
 373 }
 374
 375 /* ****************************************************************** */
 376 /* SENSOR STUFF                                                       */
 377 /* ****************************************************************** */
 378 static int ppc_rtas_sensor_read(char * buf, char ** start, off_t off,
 379                 int count, int *eof, void *data)
 380 {
 381         int i,j,n;
 382         unsigned long ret;
 383         int state, error;
 384         char buffer[MAX_LINELENGTH*MAX_SENSORS]; /* May not be enough */
 385
 386         if (count < 0)
 387                 return -EINVAL;
 388
 389         n  = sprintf ( buffer  , "RTAS (RunTime Abstraction Services) Sensor Information\n");
 390         n += sprintf ( buffer+n, "Sensor\t\tValue\t\tCondition\tLocation\n");
 391         n += sprintf ( buffer+n, "********************************************************\n");
 392
 393         if (ppc_rtas_find_all_sensors() != 0) {
 394                 n += sprintf ( buffer+n, "\nNo sensors are available\n");
 395                 goto return_string;
 396         }
 397
 398         for (i=0; i<sensors.quant; i++) {
 399                 j = sensors.sensor[i].quant;
 400                 /* A sensor may have multiple instances */
 401                 while (j >= 0) {
 402                         error = call_rtas("get-sensor-state", 2, 2, &ret,
 403                                   sensors.sensor[i].token, sensors.sensor[i].quant-j);
 404                         state = (int) ret;
 405                         n += ppc_rtas_process_sensor(sensors.sensor[i], state, error, buffer+n );
 406                         n += sprintf (buffer+n, "\n");
 407                         j--;
 408                 } /* while */
 409         } /* for */
 410
 411 return_string:
 412         if (off >= strlen(buffer)) {
 413                 *eof = 1;
 414                 return 0;
 415         }
 416         if (n > strlen(buffer) - off)
 417                 n = strlen(buffer) - off;
 418         if (n > count)
 419                 n = count;
 420         else
 421                 *eof = 1;
 422         memcpy(buf, buffer + off, n);
 423         *start = buf;
 424         return n;
 425 }
 426
 427 /* ****************************************************************** */
 428
 429 int ppc_rtas_find_all_sensors (void)
 430 {
 431         unsigned long *utmp;
 432         int len, i, j;
 433
 434         utmp = (unsigned long *) get_property(rtas, "rtas-sensors", &len);
 435         if (utmp == NULL) {
 436                 printk (KERN_ERR "error: could not get rtas-sensors\n");
 437                 return 1;
 438         }
 439
 440         sensors.quant = len / 8;      /* int + int */
 441
 442         for (i=0, j=0; j<sensors.quant; i+=2, j++) {
 443                 sensors.sensor[j].token = utmp[i];
 444                 sensors.sensor[j].quant = utmp[i+1];
 445         }
 446         return 0;
 447 }
 448
 449 /* ****************************************************************** */
 450 /*
 451  * Builds a string of what rtas returned
 452  */
 453 char * ppc_rtas_process_error(int error)
 454 {
 455         switch (error) {
 456                 case SENSOR_CRITICAL_HIGH:
 457                         return "(critical high)";
 458                 case SENSOR_WARNING_HIGH:
 459                         return "(warning high)";
 460                 case SENSOR_NORMAL:
 461                         return "(normal)";
 462                 case SENSOR_WARNING_LOW:
 463                         return "(warning low)";
 464                 case SENSOR_CRITICAL_LOW:
 465                         return "(critical low)";
 466                 case SENSOR_SUCCESS:
 467                         return "(read ok)";
 468                 case SENSOR_HW_ERROR:
 469                         return "(hardware error)";
 470                 case SENSOR_BUSY:
 471                         return "(busy)";
 472                 case SENSOR_NOT_EXIST:
 473                         return "(non existant)";
 474                 case SENSOR_DR_ENTITY:
 475                         return "(dr entity removed)";
 476                 default:
 477                         return "(UNKNOWN)";
 478         }
 479 }
 480
 481 /* ****************************************************************** */
 482 /*
 483  * Builds a string out of what the sensor said
 484  */
 485
 486 int ppc_rtas_process_sensor(struct individual_sensor s, int state,
 487                 int error, char * buf)
 488 {
 489         /* Defined return vales */
 490         const char * key_switch[]        = { "Off\t", "Normal\t", "Secure\t", "Mainenance" };
 491         const char * enclosure_switch[]  = { "Closed", "Open" };
 492         const char * lid_status[]        = { " ", "Open", "Closed" };
 493         const char * power_source[]      = { "AC\t", "Battery", "AC & Battery" };
 494         const char * battery_remaining[] = { "Very Low", "Low", "Mid", "High" };
 495         const char * epow_sensor[]       = {
 496                 "EPOW Reset", "Cooling warning", "Power warning",
 497                 "System shutdown", "System halt", "EPOW main enclosure",
 498                 "EPOW power off" };
 499         const char * battery_cyclestate[]  = { "None", "In progress", "Requested" };
 500         const char * battery_charging[]    = { "Charging", "Discharching", "No current flow" };
 501         const char * ibm_drconnector[]     = { "Empty", "Present" };
 502         const char * ibm_intqueue[]        = { "Disabled", "Enabled" };
 503
 504         int have_strings = 0;
 505         int temperature = 0;
 506         int unknown = 0;
 507         int n = 0;
 508
 509         /* What kind of sensor do we have here? */
 510         switch (s.token) {
 511                 case KEY_SWITCH:
 512                         n += sprintf(buf+n, "Key switch:\t");
 513                         n += sprintf(buf+n, "%s\t", key_switch[state]);
 514                         have_strings = 1;
 515                         break;
 516                 case ENCLOSURE_SWITCH:
 517                         n += sprintf(buf+n, "Enclosure switch:\t");
 518                         n += sprintf(buf+n, "%s\t", enclosure_switch[state]);
 519                         have_strings = 1;
 520                         break;
 521                 case THERMAL_SENSOR:
 522                         n += sprintf(buf+n, "Temp. (°C/°F):\t");
 523                         temperature = 1;
 524                         break;
 525                 case LID_STATUS:
 526                         n += sprintf(buf+n, "Lid status:\t");
 527                         n += sprintf(buf+n, "%s\t", lid_status[state]);
 528                         have_strings = 1;
 529                         break;
 530                 case POWER_SOURCE:
 531                         n += sprintf(buf+n, "Power source:\t");
 532                         n += sprintf(buf+n, "%s\t", power_source[state]);
 533                         have_strings = 1;
 534                         break;
 535                 case BATTERY_VOLTAGE:
 536                         n += sprintf(buf+n, "Battery voltage:\t");
 537                         break;
 538                 case BATTERY_REMAINING:
 539                         n += sprintf(buf+n, "Battery remaining:\t");
 540                         n += sprintf(buf+n, "%s\t", battery_remaining[state]);
 541                         have_strings = 1;
 542                         break;
 543                 case BATTERY_PERCENTAGE:
 544                         n += sprintf(buf+n, "Battery percentage:\t");
 545                         break;
 546                 case EPOW_SENSOR:
 547                         n += sprintf(buf+n, "EPOW Sensor:\t");
 548                         n += sprintf(buf+n, "%s\t", epow_sensor[state]);
 549                         have_strings = 1;
 550                         break;
 551                 case BATTERY_CYCLESTATE:
 552                         n += sprintf(buf+n, "Battery cyclestate:\t");
 553                         n += sprintf(buf+n, "%s\t", battery_cyclestate[state]);
 554                         have_strings = 1;
 555                         break;
 556                 case BATTERY_CHARGING:
 557                         n += sprintf(buf+n, "Battery Charging:\t");
 558                         n += sprintf(buf+n, "%s\t", battery_charging[state]);
 559                         have_strings = 1;
 560                         break;
 561                 case IBM_SURVEILLANCE:
 562                         n += sprintf(buf+n, "Surveillance:\t");
 563                         break;
 564                 case IBM_FANRPM:
 565                         n += sprintf(buf+n, "Fan (rpm):\t");
 566                         break;
 567                 case IBM_VOLTAGE:
 568                         n += sprintf(buf+n, "Voltage (mv):\t");
 569                         break;
 570                 case IBM_DRCONNECTOR:
 571                         n += sprintf(buf+n, "DR connector:\t");
 572                         n += sprintf(buf+n, "%s\t", ibm_drconnector[state]);
 573                         have_strings = 1;
 574                         break;
 575                 case IBM_POWERSUPPLY:
 576                         n += sprintf(buf+n, "Powersupply:\t");
 577                         break;
 578                 case IBM_INTQUEUE:
 579                         n += sprintf(buf+n, "Interrupt queue:\t");
 580                         n += sprintf(buf+n, "%s\t", ibm_intqueue[state]);
 581                         have_strings = 1;
 582                         break;
 583                 default:
 584                         n += sprintf(buf+n,  "Unkown sensor (type %d), ignoring it\n",
 585                                         s.token);
 586                         unknown = 1;
 587                         have_strings = 1;
 588                         break;
 589         }
 590         if (have_strings == 0) {
 591                 if (temperature) {
 592                         n += sprintf(buf+n, "%4d /%4d\t", state, cel_to_fahr(state));
 593                 } else
 594                         n += sprintf(buf+n, "%10d\t", state);
 595         }
 596         if (unknown == 0) {
 597                 n += sprintf ( buf+n, "%s\t", ppc_rtas_process_error(error));
 598                 n += get_location_code(s, buf+n);
 599         }
 600         return n;
 601 }
 602
 603 /* ****************************************************************** */
 604
 605 int check_location (char *c, int idx, char * buf)
 606 {
 607         int n = 0;
 608
 609         switch (*(c+idx)) {
 610                 case LOC_PLANAR:
 611                         n += sprintf ( buf, "Planar #%c", *(c+idx+1));
 612                         break;
 613                 case LOC_CPU:
 614                         n += sprintf ( buf, "CPU #%c", *(c+idx+1));
 615                         break;
 616                 case LOC_FAN:
 617                         n += sprintf ( buf, "Fan #%c", *(c+idx+1));
 618                         break;
 619                 case LOC_RACKMOUNTED:
 620                         n += sprintf ( buf, "Rack #%c", *(c+idx+1));
 621                         break;
 622                 case LOC_VOLTAGE:
 623                         n += sprintf ( buf, "Voltage #%c", *(c+idx+1));
 624                         break;
 625                 case LOC_LCD:
 626                         n += sprintf ( buf, "LCD #%c", *(c+idx+1));
 627                         break;
 628                 case '.':
 629                         n += sprintf ( buf, "- %c", *(c+idx+1));
 630                 default:
 631                         n += sprintf ( buf, "Unknown location");
 632                         break;
 633         }
 634         return n;
 635 }
 636
 637
 638 /* ****************************************************************** */
 639 /*
 640  * Format:
 641  * ${LETTER}${NUMBER}[[-/]${LETTER}${NUMBER} [ ... ] ]
 642  * the '.' may be an abbrevation
 643  */
 644 int check_location_string (char *c, char *buf)
 645 {
 646         int n=0,i=0;
 647
 648         while (c[i]) {
 649                 if (isalpha(c[i]) || c[i] == '.') {
 650                          n += check_location(c, i, buf+n);
 651                 }
 652                 else if (c[i] == '/' || c[i] == '-')
 653                         n += sprintf(buf+n, " at ");
 654                 i++;
 655         }
 656         return n;
 657 }
 658
 659
 660 /* ****************************************************************** */
 661
 662 int get_location_code(struct individual_sensor s, char * buffer)
 663 {
 664         char rstr[512], tmp[10], tmp2[10];
 665         int n=0, i=0, llen, len;
 666         /* char *buf = kmalloc(MAX_LINELENGTH, GFP_KERNEL); */
 667         char *ret;
 668
 669         static int pos = 0; /* remember position where buffer was */
 670
 671         /* construct the sensor number like 0003 */
 672         /* fill with zeros */
 673         n = sprintf(tmp, "%d", s.token);
 674         len = strlen(tmp);
 675         while (strlen(tmp) < 4)
 676                 n += sprintf (tmp+n, "0");
 677
 678         /* invert the string */
 679         while (tmp[i]) {
 680                 if (i<len)
 681                         tmp2[4-len+i] = tmp[i];
 682                 else
 683                         tmp2[3-i] = tmp[i];
 684                 i++;
 685         }
 686         tmp2[4] = '\0';
 687
 688         sprintf (rstr, SENSOR_PREFIX"%s", tmp2);
 689
 690         ret = (char *) get_property(rtas, rstr, &llen);
 691
 692         n=0;
 693         if (ret[0] == '\0')
 694                 n += sprintf ( buffer+n, "--- ");/* does not have a location */
 695         else {
 696                 char t[50];
 697                 ret += pos;
 698
 699                 n += check_location_string(ret, buffer + n);
 700                 n += sprintf ( buffer+n, " ");
 701                 /* see how many characters we have printed */
 702                 sprintf ( t, "%s ", ret);
 703
 704                 pos += strlen(t);
 705                 if (pos >= llen) pos=0;
 706         }
 707         return n;
 708 }
 709 /* ****************************************************************** */
 710 /* INDICATORS - Tone Frequency                                        */
 711 /* ****************************************************************** */
 712 static ssize_t ppc_rtas_tone_freq_write(struct file * file, const char * buf,
 713                 size_t count, loff_t *ppos)
 714 {
 715         unsigned long freq;
 716         char *dest;
 717         int error;
 718         freq = simple_strtoul(buf, &dest, 10);
 719         if (*dest != '\0' && *dest != '\n') {
 720                 printk("ppc_rtas_tone_freq_write: Invalid tone freqency\n");
 721                 return count;
 722         }
 723         if (freq < 0) freq = 0;
 724         rtas_tone_frequency = freq; /* save it for later */
 725         error = call_rtas("set-indicator", 3, 1, NULL,
 726                         TONE_FREQUENCY, 0, freq);
 727         if (error != 0)
 728                 printk(KERN_WARNING "error: setting tone frequency returned: %s\n",
 729                                 ppc_rtas_process_error(error));
 730         return count;
 731 }
 732 /* ****************************************************************** */
 733 static ssize_t ppc_rtas_tone_freq_read(struct file * file, char * buf,
 734                 size_t count, loff_t *ppos)
 735 {
 736         int n;
 737         n = sprintf(buf, "%lu\n", rtas_tone_frequency);
 738
 739         if (*ppos >= strlen(buf))
 740                 return 0;
 741         if (n > strlen(buf) - *ppos)
 742                 n = strlen(buf) - *ppos;
 743         if (n > count)
 744                 n = count;
 745         *ppos += n;
 746         return n;
 747 }
 748 /* ****************************************************************** */
 749 /* INDICATORS - Tone Volume                                           */
 750 /* ****************************************************************** */
 751 static ssize_t ppc_rtas_tone_volume_write(struct file * file, const char * buf,
 752                 size_t count, loff_t *ppos)
 753 {
 754         unsigned long volume;
 755         char *dest;
 756         int error;
 757         volume = simple_strtoul(buf, &dest, 10);
 758         if (*dest != '\0' && *dest != '\n') {
 759                 printk("ppc_rtas_tone_volume_write: Invalid tone volume\n");
 760                 return count;
 761         }
 762         if (volume < 0) volume = 0;
 763         if (volume > 100) volume = 100;
 764
 765         rtas_tone_volume = volume; /* save it for later */
 766         error = call_rtas("set-indicator", 3, 1, NULL,
 767                         TONE_VOLUME, 0, volume);
 768         if (error != 0)
 769                 printk(KERN_WARNING "error: setting tone volume returned: %s\n",
 770                                 ppc_rtas_process_error(error));
 771         return count;
 772 }
 773 /* ****************************************************************** */
 774 static ssize_t ppc_rtas_tone_volume_read(struct file * file, char * buf,
 775                 size_t count, loff_t *ppos)
 776 {
 777         int n;
 778         n = sprintf(buf, "%lu\n", rtas_tone_volume);
 779
 780         if (*ppos >= strlen(buf))
 781                 return 0;
 782         if (n > strlen(buf) - *ppos)
 783                 n = strlen(buf) - *ppos;
 784         if (n > count)
 785                 n = count;
 786         *ppos += n;
 787         return n;
 788 }