arch/powerpc/kernel/rtas-proc.c

   1 /*
   2  *   Copyright (C) 2000 Tilmann Bitterberg
   3  *   (tilmann@bitterberg.de)
   4  *
   5  *   RTAS (Runtime Abstraction Services) stuff
   6  *   Intention is to provide a clean user interface
   7  *   to use the RTAS.
   8  *
   9  *   TODO:
  10  *   Split off a header file and maybe move it to a different
  11  *   location. Write Documentation on what the /proc/rtas/ entries
  12  *   actually do.
  13  */
  14
  15 #include <linux/errno.h>
  16 #include <linux/sched.h>
  17 #include <linux/proc_fs.h>
  18 #include <linux/stat.h>
  19 #include <linux/ctype.h>
  20 #include <linux/time.h>
  21 #include <linux/string.h>
  22 #include <linux/init.h>
  23 #include <linux/seq_file.h>
  24 #include <linux/bitops.h>
  25 #include <linux/rtc.h>
  26
  27 #include <linux/uaccess.h>
  28 #include <asm/processor.h>
  29 #include <asm/io.h>
  30 #include <asm/prom.h>
  31 #include <asm/rtas.h>
  32 #include <asm/machdep.h> /* for ppc_md */
  33 #include <asm/time.h>
  34
  35 /* Token for Sensors */
  36 #define KEY_SWITCH              0x0001
  37 #define ENCLOSURE_SWITCH        0x0002
  38 #define THERMAL_SENSOR          0x0003
  39 #define LID_STATUS              0x0004
  40 #define POWER_SOURCE            0x0005
  41 #define BATTERY_VOLTAGE         0x0006
  42 #define BATTERY_REMAINING       0x0007
  43 #define BATTERY_PERCENTAGE      0x0008
  44 #define EPOW_SENSOR             0x0009
  45 #define BATTERY_CYCLESTATE      0x000a
  46 #define BATTERY_CHARGING        0x000b
  47
  48 /* IBM specific sensors */
  49 #define IBM_SURVEILLANCE        0x2328 /* 9000 */
  50 #define IBM_FANRPM              0x2329 /* 9001 */
  51 #define IBM_VOLTAGE             0x232a /* 9002 */
  52 #define IBM_DRCONNECTOR         0x232b /* 9003 */
  53 #define IBM_POWERSUPPLY         0x232c /* 9004 */
  54
  55 /* Status return values */
  56 #define SENSOR_CRITICAL_HIGH    13
  57 #define SENSOR_WARNING_HIGH     12
  58 #define SENSOR_NORMAL           11
  59 #define SENSOR_WARNING_LOW      10
  60 #define SENSOR_CRITICAL_LOW      9
  61 #define SENSOR_SUCCESS           0
  62 #define SENSOR_HW_ERROR         -1
  63 #define SENSOR_BUSY             -2
  64 #define SENSOR_NOT_EXIST        -3
  65 #define SENSOR_DR_ENTITY        -9000
  66
  67 /* Location Codes */
  68 #define LOC_SCSI_DEV_ADDR       'A'
  69 #define LOC_SCSI_DEV_LOC        'B'
  70 #define LOC_CPU                 'C'
  71 #define LOC_DISKETTE            'D'
  72 #define LOC_ETHERNET            'E'
  73 #define LOC_FAN                 'F'
  74 #define LOC_GRAPHICS            'G'
  75 /* reserved / not used          'H' */
  76 #define LOC_IO_ADAPTER          'I'
  77 /* reserved / not used          'J' */
  78 #define LOC_KEYBOARD            'K'
  79 #define LOC_LCD                 'L'
  80 #define LOC_MEMORY              'M'
  81 #define LOC_NV_MEMORY           'N'
  82 #define LOC_MOUSE               'O'
  83 #define LOC_PLANAR              'P'
  84 #define LOC_OTHER_IO            'Q'
  85 #define LOC_PARALLEL            'R'
  86 #define LOC_SERIAL              'S'
  87 #define LOC_DEAD_RING           'T'
  88 #define LOC_RACKMOUNTED         'U' /* for _u_nit is rack mounted */
  89 #define LOC_VOLTAGE             'V'
  90 #define LOC_SWITCH_ADAPTER      'W'
  91 #define LOC_OTHER               'X'
  92 #define LOC_FIRMWARE            'Y'
  93 #define LOC_SCSI                'Z'
  94
  95 /* Tokens for indicators */
  96 #define TONE_FREQUENCY          0x0001 /* 0 - 1000 (HZ)*/
  97 #define TONE_VOLUME             0x0002 /* 0 - 100 (%) */
  98 #define SYSTEM_POWER_STATE      0x0003
  99 #define WARNING_LIGHT           0x0004
 100 #define DISK_ACTIVITY_LIGHT     0x0005
 101 #define HEX_DISPLAY_UNIT        0x0006
 102 #define BATTERY_WARNING_TIME    0x0007
 103 #define CONDITION_CYCLE_REQUEST 0x0008
 104 #define SURVEILLANCE_INDICATOR  0x2328 /* 9000 */
 105 #define DR_ACTION               0x2329 /* 9001 */
 106 #define DR_INDICATOR            0x232a /* 9002 */
 107 /* 9003 - 9004: Vendor specific */
 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 struct individual_sensor {
 117         unsigned int token;
 118         unsigned int quant;
 119 };
 120
 121 struct rtas_sensors {
 122         struct individual_sensor sensor[MAX_SENSORS];
 123         unsigned int quant;
 124 };
 125
 126 /* Globals */
 127 static struct rtas_sensors sensors;
 128 static struct device_node *rtas_node = NULL;
 129 static unsigned long power_on_time = 0; /* Save the time the user set */
 130 static char progress_led[MAX_LINELENGTH];
 131
 132 static unsigned long rtas_tone_frequency = 1000;
 133 static unsigned long rtas_tone_volume = 0;
 134
 135 /* ****************************************************************** */
 136 /* Declarations */
 137 static int ppc_rtas_sensors_show(struct seq_file *m, void *v);
 138 static int ppc_rtas_clock_show(struct seq_file *m, void *v);
 139 static ssize_t ppc_rtas_clock_write(struct file *file,
 140                 const char __user *buf, size_t count, loff_t *ppos);
 141 static int ppc_rtas_progress_show(struct seq_file *m, void *v);
 142 static ssize_t ppc_rtas_progress_write(struct file *file,
 143                 const char __user *buf, size_t count, loff_t *ppos);
 144 static int ppc_rtas_poweron_show(struct seq_file *m, void *v);
 145 static ssize_t ppc_rtas_poweron_write(struct file *file,
 146                 const char __user *buf, size_t count, loff_t *ppos);
 147
 148 static ssize_t ppc_rtas_tone_freq_write(struct file *file,
 149                 const char __user *buf, size_t count, loff_t *ppos);
 150 static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v);
 151 static ssize_t ppc_rtas_tone_volume_write(struct file *file,
 152                 const char __user *buf, size_t count, loff_t *ppos);
 153 static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v);
 154 static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v);
 155
 156 static int sensors_open(struct inode *inode, struct file *file)
 157 {
 158         return single_open(file, ppc_rtas_sensors_show, NULL);
 159 }
 160
 161 static const struct file_operations ppc_rtas_sensors_operations = {
 162         .open           = sensors_open,
 163         .read           = seq_read,
 164         .llseek         = seq_lseek,
 165         .release        = single_release,
 166 };
 167
 168 static int poweron_open(struct inode *inode, struct file *file)
 169 {
 170         return single_open(file, ppc_rtas_poweron_show, NULL);
 171 }
 172
 173 static const struct file_operations ppc_rtas_poweron_operations = {
 174         .open           = poweron_open,
 175         .read           = seq_read,
 176         .llseek         = seq_lseek,
 177         .write          = ppc_rtas_poweron_write,
 178         .release        = single_release,
 179 };
 180
 181 static int progress_open(struct inode *inode, struct file *file)
 182 {
 183         return single_open(file, ppc_rtas_progress_show, NULL);
 184 }
 185
 186 static const struct file_operations ppc_rtas_progress_operations = {
 187         .open           = progress_open,
 188         .read           = seq_read,
 189         .llseek         = seq_lseek,
 190         .write          = ppc_rtas_progress_write,
 191         .release        = single_release,
 192 };
 193
 194 static int clock_open(struct inode *inode, struct file *file)
 195 {
 196         return single_open(file, ppc_rtas_clock_show, NULL);
 197 }
 198
 199 static const struct file_operations ppc_rtas_clock_operations = {
 200         .open           = clock_open,
 201         .read           = seq_read,
 202         .llseek         = seq_lseek,
 203         .write          = ppc_rtas_clock_write,
 204         .release        = single_release,
 205 };
 206
 207 static int tone_freq_open(struct inode *inode, struct file *file)
 208 {
 209         return single_open(file, ppc_rtas_tone_freq_show, NULL);
 210 }
 211
 212 static const struct file_operations ppc_rtas_tone_freq_operations = {
 213         .open           = tone_freq_open,
 214         .read           = seq_read,
 215         .llseek         = seq_lseek,
 216         .write          = ppc_rtas_tone_freq_write,
 217         .release        = single_release,
 218 };
 219
 220 static int tone_volume_open(struct inode *inode, struct file *file)
 221 {
 222         return single_open(file, ppc_rtas_tone_volume_show, NULL);
 223 }
 224
 225 static const struct file_operations ppc_rtas_tone_volume_operations = {
 226         .open           = tone_volume_open,
 227         .read           = seq_read,
 228         .llseek         = seq_lseek,
 229         .write          = ppc_rtas_tone_volume_write,
 230         .release        = single_release,
 231 };
 232
 233 static int rmo_buf_open(struct inode *inode, struct file *file)
 234 {
 235         return single_open(file, ppc_rtas_rmo_buf_show, NULL);
 236 }
 237
 238 static const struct file_operations ppc_rtas_rmo_buf_ops = {
 239         .open           = rmo_buf_open,
 240         .read           = seq_read,
 241         .llseek         = seq_lseek,
 242         .release        = single_release,
 243 };
 244
 245 static int ppc_rtas_find_all_sensors(void);
 246 static void ppc_rtas_process_sensor(struct seq_file *m,
 247         struct individual_sensor *s, int state, int error, const char *loc);
 248 static char *ppc_rtas_process_error(int error);
 249 static void get_location_code(struct seq_file *m,
 250         struct individual_sensor *s, const char *loc);
 251 static void check_location_string(struct seq_file *m, const char *c);
 252 static void check_location(struct seq_file *m, const char *c);
 253
 254 static int __init proc_rtas_init(void)
 255 {
 256         if (!machine_is(pseries))
 257                 return -ENODEV;
 258
 259         rtas_node = of_find_node_by_name(NULL, "rtas");
 260         if (rtas_node == NULL)
 261                 return -ENODEV;
 262
 263         proc_create("powerpc/rtas/progress", S_IRUGO|S_IWUSR, NULL,
 264                     &ppc_rtas_progress_operations);
 265         proc_create("powerpc/rtas/clock", S_IRUGO|S_IWUSR, NULL,
 266                     &ppc_rtas_clock_operations);
 267         proc_create("powerpc/rtas/poweron", S_IWUSR|S_IRUGO, NULL,
 268                     &ppc_rtas_poweron_operations);
 269         proc_create("powerpc/rtas/sensors", S_IRUGO, NULL,
 270                     &ppc_rtas_sensors_operations);
 271         proc_create("powerpc/rtas/frequency", S_IWUSR|S_IRUGO, NULL,
 272                     &ppc_rtas_tone_freq_operations);
 273         proc_create("powerpc/rtas/volume", S_IWUSR|S_IRUGO, NULL,
 274                     &ppc_rtas_tone_volume_operations);
 275         proc_create("powerpc/rtas/rmo_buffer", S_IRUSR, NULL,
 276                     &ppc_rtas_rmo_buf_ops);
 277         return 0;
 278 }
 279
 280 __initcall(proc_rtas_init);
 281
 282 static int parse_number(const char __user *p, size_t count, unsigned long *val)
 283 {
 284         char buf[40];
 285         char *end;
 286
 287         if (count > 39)
 288                 return -EINVAL;
 289
 290         if (copy_from_user(buf, p, count))
 291                 return -EFAULT;
 292
 293         buf[count] = 0;
 294
 295         *val = simple_strtoul(buf, &end, 10);
 296         if (*end && *end != '\n')
 297                 return -EINVAL;
 298
 299         return 0;
 300 }
 301
 302 /* ****************************************************************** */
 303 /* POWER-ON-TIME                                                      */
 304 /* ****************************************************************** */
 305 static ssize_t ppc_rtas_poweron_write(struct file *file,
 306                 const char __user *buf, size_t count, loff_t *ppos)
 307 {
 308         struct rtc_time tm;
 309         unsigned long nowtime;
 310         int error = parse_number(buf, count, &nowtime);
 311         if (error)
 312                 return error;
 313
 314         power_on_time = nowtime; /* save the time */
 315
 316         to_tm(nowtime, &tm);
 317
 318         error = rtas_call(rtas_token("set-time-for-power-on"), 7, 1, NULL,
 319                         tm.tm_year, tm.tm_mon, tm.tm_mday,
 320                         tm.tm_hour, tm.tm_min, tm.tm_sec, 0 /* nano */);
 321         if (error)
 322                 printk(KERN_WARNING "error: setting poweron time returned: %s\n",
 323                                 ppc_rtas_process_error(error));
 324         return count;
 325 }
 326 /* ****************************************************************** */
 327 static int ppc_rtas_poweron_show(struct seq_file *m, void *v)
 328 {
 329         if (power_on_time == 0)
 330                 seq_printf(m, "Power on time not set\n");
 331         else
 332                 seq_printf(m, "%lu\n",power_on_time);
 333         return 0;
 334 }
 335
 336 /* ****************************************************************** */
 337 /* PROGRESS                                                           */
 338 /* ****************************************************************** */
 339 static ssize_t ppc_rtas_progress_write(struct file *file,
 340                 const char __user *buf, size_t count, loff_t *ppos)
 341 {
 342         unsigned long hex;
 343
 344         if (count >= MAX_LINELENGTH)
 345                 count = MAX_LINELENGTH -1;
 346         if (copy_from_user(progress_led, buf, count)) { /* save the string */
 347                 return -EFAULT;
 348         }
 349         progress_led[count] = 0;
 350
 351         /* Lets see if the user passed hexdigits */
 352         hex = simple_strtoul(progress_led, NULL, 10);
 353
 354         rtas_progress ((char *)progress_led, hex);
 355         return count;
 356
 357         /* clear the line */
 358         /* rtas_progress("                   ", 0xffff);*/
 359 }
 360 /* ****************************************************************** */
 361 static int ppc_rtas_progress_show(struct seq_file *m, void *v)
 362 {
 363         if (progress_led[0])
 364                 seq_printf(m, "%s\n", progress_led);
 365         return 0;
 366 }
 367
 368 /* ****************************************************************** */
 369 /* CLOCK                                                              */
 370 /* ****************************************************************** */
 371 static ssize_t ppc_rtas_clock_write(struct file *file,
 372                 const char __user *buf, size_t count, loff_t *ppos)
 373 {
 374         struct rtc_time tm;
 375         unsigned long nowtime;
 376         int error = parse_number(buf, count, &nowtime);
 377         if (error)
 378                 return error;
 379
 380         to_tm(nowtime, &tm);
 381         error = rtas_call(rtas_token("set-time-of-day"), 7, 1, NULL,
 382                         tm.tm_year, tm.tm_mon, tm.tm_mday,
 383                         tm.tm_hour, tm.tm_min, tm.tm_sec, 0);
 384         if (error)
 385                 printk(KERN_WARNING "error: setting the clock returned: %s\n",
 386                                 ppc_rtas_process_error(error));
 387         return count;
 388 }
 389 /* ****************************************************************** */
 390 static int ppc_rtas_clock_show(struct seq_file *m, void *v)
 391 {
 392         int ret[8];
 393         int error = rtas_call(rtas_token("get-time-of-day"), 0, 8, ret);
 394
 395         if (error) {
 396                 printk(KERN_WARNING "error: reading the clock returned: %s\n",
 397                                 ppc_rtas_process_error(error));
 398                 seq_printf(m, "0");
 399         } else {
 400                 unsigned int year, mon, day, hour, min, sec;
 401                 year = ret[0]; mon  = ret[1]; day  = ret[2];
 402                 hour = ret[3]; min  = ret[4]; sec  = ret[5];
 403                 seq_printf(m, "%lu\n",
 404                                 mktime(year, mon, day, hour, min, sec));
 405         }
 406         return 0;
 407 }
 408
 409 /* ****************************************************************** */
 410 /* SENSOR STUFF                                                       */
 411 /* ****************************************************************** */
 412 static int ppc_rtas_sensors_show(struct seq_file *m, void *v)
 413 {
 414         int i,j;
 415         int state, error;
 416         int get_sensor_state = rtas_token("get-sensor-state");
 417
 418         seq_printf(m, "RTAS (RunTime Abstraction Services) Sensor Information\n");
 419         seq_printf(m, "Sensor\t\tValue\t\tCondition\tLocation\n");
 420         seq_printf(m, "********************************************************\n");
 421
 422         if (ppc_rtas_find_all_sensors() != 0) {
 423                 seq_printf(m, "\nNo sensors are available\n");
 424                 return 0;
 425         }
 426
 427         for (i=0; i<sensors.quant; i++) {
 428                 struct individual_sensor *p = &sensors.sensor[i];
 429                 char rstr[64];
 430                 const char *loc;
 431                 int llen, offs;
 432
 433                 sprintf (rstr, SENSOR_PREFIX"%04d", p->token);
 434                 loc = of_get_property(rtas_node, rstr, &llen);
 435
 436                 /* A sensor may have multiple instances */
 437                 for (j = 0, offs = 0; j <= p->quant; j++) {
 438                         error = rtas_call(get_sensor_state, 2, 2, &state,
 439                                           p->token, j);
 440
 441                         ppc_rtas_process_sensor(m, p, state, error, loc);
 442                         seq_putc(m, '\n');
 443                         if (loc) {
 444                                 offs += strlen(loc) + 1;
 445                                 loc += strlen(loc) + 1;
 446                                 if (offs >= llen)
 447                                         loc = NULL;
 448                         }
 449                 }
 450         }
 451         return 0;
 452 }
 453
 454 /* ****************************************************************** */
 455
 456 static int ppc_rtas_find_all_sensors(void)
 457 {
 458         const unsigned int *utmp;
 459         int len, i;
 460
 461         utmp = of_get_property(rtas_node, "rtas-sensors", &len);
 462         if (utmp == NULL) {
 463                 printk (KERN_ERR "error: could not get rtas-sensors\n");
 464                 return 1;
 465         }
 466
 467         sensors.quant = len / 8;      /* int + int */
 468
 469         for (i=0; i<sensors.quant; i++) {
 470                 sensors.sensor[i].token = *utmp++;
 471                 sensors.sensor[i].quant = *utmp++;
 472         }
 473         return 0;
 474 }
 475
 476 /* ****************************************************************** */
 477 /*
 478  * Builds a string of what rtas returned
 479  */
 480 static char *ppc_rtas_process_error(int error)
 481 {
 482         switch (error) {
 483                 case SENSOR_CRITICAL_HIGH:
 484                         return "(critical high)";
 485                 case SENSOR_WARNING_HIGH:
 486                         return "(warning high)";
 487                 case SENSOR_NORMAL:
 488                         return "(normal)";
 489                 case SENSOR_WARNING_LOW:
 490                         return "(warning low)";
 491                 case SENSOR_CRITICAL_LOW:
 492                         return "(critical low)";
 493                 case SENSOR_SUCCESS:
 494                         return "(read ok)";
 495                 case SENSOR_HW_ERROR:
 496                         return "(hardware error)";
 497                 case SENSOR_BUSY:
 498                         return "(busy)";
 499                 case SENSOR_NOT_EXIST:
 500                         return "(non existent)";
 501                 case SENSOR_DR_ENTITY:
 502                         return "(dr entity removed)";
 503                 default:
 504                         return "(UNKNOWN)";
 505         }
 506 }
 507
 508 /* ****************************************************************** */
 509 /*
 510  * Builds a string out of what the sensor said
 511  */
 512
 513 static void ppc_rtas_process_sensor(struct seq_file *m,
 514         struct individual_sensor *s, int state, int error, const char *loc)
 515 {
 516         /* Defined return vales */
 517         const char * key_switch[]        = { "Off\t", "Normal\t", "Secure\t",
 518                                                 "Maintenance" };
 519         const char * enclosure_switch[]  = { "Closed", "Open" };
 520         const char * lid_status[]        = { " ", "Open", "Closed" };
 521         const char * power_source[]      = { "AC\t", "Battery",
 522                                                 "AC & Battery" };
 523         const char * battery_remaining[] = { "Very Low", "Low", "Mid", "High" };
 524         const char * epow_sensor[]       = {
 525                 "EPOW Reset", "Cooling warning", "Power warning",
 526                 "System shutdown", "System halt", "EPOW main enclosure",
 527                 "EPOW power off" };
 528         const char * battery_cyclestate[]  = { "None", "In progress",
 529                                                 "Requested" };
 530         const char * battery_charging[]    = { "Charging", "Discharching",
 531                                                 "No current flow" };
 532         const char * ibm_drconnector[]     = { "Empty", "Present", "Unusable",
 533                                                 "Exchange" };
 534
 535         int have_strings = 0;
 536         int num_states = 0;
 537         int temperature = 0;
 538         int unknown = 0;
 539
 540         /* What kind of sensor do we have here? */
 541
 542         switch (s->token) {
 543                 case KEY_SWITCH:
 544                         seq_printf(m, "Key switch:\t");
 545                         num_states = sizeof(key_switch) / sizeof(char *);
 546                         if (state < num_states) {
 547                                 seq_printf(m, "%s\t", key_switch[state]);
 548                                 have_strings = 1;
 549                         }
 550                         break;
 551                 case ENCLOSURE_SWITCH:
 552                         seq_printf(m, "Enclosure switch:\t");
 553                         num_states = sizeof(enclosure_switch) / sizeof(char *);
 554                         if (state < num_states) {
 555                                 seq_printf(m, "%s\t",
 556                                                 enclosure_switch[state]);
 557                                 have_strings = 1;
 558                         }
 559                         break;
 560                 case THERMAL_SENSOR:
 561                         seq_printf(m, "Temp. (C/F):\t");
 562                         temperature = 1;
 563                         break;
 564                 case LID_STATUS:
 565                         seq_printf(m, "Lid status:\t");
 566                         num_states = sizeof(lid_status) / sizeof(char *);
 567                         if (state < num_states) {
 568                                 seq_printf(m, "%s\t", lid_status[state]);
 569                                 have_strings = 1;
 570                         }
 571                         break;
 572                 case POWER_SOURCE:
 573                         seq_printf(m, "Power source:\t");
 574                         num_states = sizeof(power_source) / sizeof(char *);
 575                         if (state < num_states) {
 576                                 seq_printf(m, "%s\t",
 577                                                 power_source[state]);
 578                                 have_strings = 1;
 579                         }
 580                         break;
 581                 case BATTERY_VOLTAGE:
 582                         seq_printf(m, "Battery voltage:\t");
 583                         break;
 584                 case BATTERY_REMAINING:
 585                         seq_printf(m, "Battery remaining:\t");
 586                         num_states = sizeof(battery_remaining) / sizeof(char *);
 587                         if (state < num_states)
 588                         {
 589                                 seq_printf(m, "%s\t",
 590                                                 battery_remaining[state]);
 591                                 have_strings = 1;
 592                         }
 593                         break;
 594                 case BATTERY_PERCENTAGE:
 595                         seq_printf(m, "Battery percentage:\t");
 596                         break;
 597                 case EPOW_SENSOR:
 598                         seq_printf(m, "EPOW Sensor:\t");
 599                         num_states = sizeof(epow_sensor) / sizeof(char *);
 600                         if (state < num_states) {
 601                                 seq_printf(m, "%s\t", epow_sensor[state]);
 602                                 have_strings = 1;
 603                         }
 604                         break;
 605                 case BATTERY_CYCLESTATE:
 606                         seq_printf(m, "Battery cyclestate:\t");
 607                         num_states = sizeof(battery_cyclestate) /
 608                                         sizeof(char *);
 609                         if (state < num_states) {
 610                                 seq_printf(m, "%s\t",
 611                                                 battery_cyclestate[state]);
 612                                 have_strings = 1;
 613                         }
 614                         break;
 615                 case BATTERY_CHARGING:
 616                         seq_printf(m, "Battery Charging:\t");
 617                         num_states = sizeof(battery_charging) / sizeof(char *);
 618                         if (state < num_states) {
 619                                 seq_printf(m, "%s\t",
 620                                                 battery_charging[state]);
 621                                 have_strings = 1;
 622                         }
 623                         break;
 624                 case IBM_SURVEILLANCE:
 625                         seq_printf(m, "Surveillance:\t");
 626                         break;
 627                 case IBM_FANRPM:
 628                         seq_printf(m, "Fan (rpm):\t");
 629                         break;
 630                 case IBM_VOLTAGE:
 631                         seq_printf(m, "Voltage (mv):\t");
 632                         break;
 633                 case IBM_DRCONNECTOR:
 634                         seq_printf(m, "DR connector:\t");
 635                         num_states = sizeof(ibm_drconnector) / sizeof(char *);
 636                         if (state < num_states) {
 637                                 seq_printf(m, "%s\t",
 638                                                 ibm_drconnector[state]);
 639                                 have_strings = 1;
 640                         }
 641                         break;
 642                 case IBM_POWERSUPPLY:
 643                         seq_printf(m, "Powersupply:\t");
 644                         break;
 645                 default:
 646                         seq_printf(m,  "Unknown sensor (type %d), ignoring it\n",
 647                                         s->token);
 648                         unknown = 1;
 649                         have_strings = 1;
 650                         break;
 651         }
 652         if (have_strings == 0) {
 653                 if (temperature) {
 654                         seq_printf(m, "%4d /%4d\t", state, cel_to_fahr(state));
 655                 } else
 656                         seq_printf(m, "%10d\t", state);
 657         }
 658         if (unknown == 0) {
 659                 seq_printf(m, "%s\t", ppc_rtas_process_error(error));
 660                 get_location_code(m, s, loc);
 661         }
 662 }
 663
 664 /* ****************************************************************** */
 665
 666 static void check_location(struct seq_file *m, const char *c)
 667 {
 668         switch (c[0]) {
 669                 case LOC_PLANAR:
 670                         seq_printf(m, "Planar #%c", c[1]);
 671                         break;
 672                 case LOC_CPU:
 673                         seq_printf(m, "CPU #%c", c[1]);
 674                         break;
 675                 case LOC_FAN:
 676                         seq_printf(m, "Fan #%c", c[1]);
 677                         break;
 678                 case LOC_RACKMOUNTED:
 679                         seq_printf(m, "Rack #%c", c[1]);
 680                         break;
 681                 case LOC_VOLTAGE:
 682                         seq_printf(m, "Voltage #%c", c[1]);
 683                         break;
 684                 case LOC_LCD:
 685                         seq_printf(m, "LCD #%c", c[1]);
 686                         break;
 687                 case '.':
 688                         seq_printf(m, "- %c", c[1]);
 689                         break;
 690                 default:
 691                         seq_printf(m, "Unknown location");
 692                         break;
 693         }
 694 }
 695
 696
 697 /* ****************************************************************** */
 698 /*
 699  * Format:
 700  * ${LETTER}${NUMBER}[[-/]${LETTER}${NUMBER} [ ... ] ]
 701  * the '.' may be an abbreviation
 702  */
 703 static void check_location_string(struct seq_file *m, const char *c)
 704 {
 705         while (*c) {
 706                 if (isalpha(*c) || *c == '.')
 707                         check_location(m, c);
 708                 else if (*c == '/' || *c == '-')
 709                         seq_printf(m, " at ");
 710                 c++;
 711         }
 712 }
 713
 714
 715 /* ****************************************************************** */
 716
 717 static void get_location_code(struct seq_file *m, struct individual_sensor *s,
 718                 const char *loc)
 719 {
 720         if (!loc || !*loc) {
 721                 seq_printf(m, "---");/* does not have a location */
 722         } else {
 723                 check_location_string(m, loc);
 724         }
 725         seq_putc(m, ' ');
 726 }
 727 /* ****************************************************************** */
 728 /* INDICATORS - Tone Frequency                                        */
 729 /* ****************************************************************** */
 730 static ssize_t ppc_rtas_tone_freq_write(struct file *file,
 731                 const char __user *buf, size_t count, loff_t *ppos)
 732 {
 733         unsigned long freq;
 734         int error = parse_number(buf, count, &freq);
 735         if (error)
 736                 return error;
 737
 738         rtas_tone_frequency = freq; /* save it for later */
 739         error = rtas_call(rtas_token("set-indicator"), 3, 1, NULL,
 740                         TONE_FREQUENCY, 0, freq);
 741         if (error)
 742                 printk(KERN_WARNING "error: setting tone frequency returned: %s\n",
 743                                 ppc_rtas_process_error(error));
 744         return count;
 745 }
 746 /* ****************************************************************** */
 747 static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v)
 748 {
 749         seq_printf(m, "%lu\n", rtas_tone_frequency);
 750         return 0;
 751 }
 752 /* ****************************************************************** */
 753 /* INDICATORS - Tone Volume                                           */
 754 /* ****************************************************************** */
 755 static ssize_t ppc_rtas_tone_volume_write(struct file *file,
 756                 const char __user *buf, size_t count, loff_t *ppos)
 757 {
 758         unsigned long volume;
 759         int error = parse_number(buf, count, &volume);
 760         if (error)
 761                 return error;
 762
 763         if (volume > 100)
 764                 volume = 100;
 765
 766         rtas_tone_volume = volume; /* save it for later */
 767         error = rtas_call(rtas_token("set-indicator"), 3, 1, NULL,
 768                         TONE_VOLUME, 0, volume);
 769         if (error)
 770                 printk(KERN_WARNING "error: setting tone volume returned: %s\n",
 771                                 ppc_rtas_process_error(error));
 772         return count;
 773 }
 774 /* ****************************************************************** */
 775 static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v)
 776 {
 777         seq_printf(m, "%lu\n", rtas_tone_volume);
 778         return 0;
 779 }
 780
 781 #define RMO_READ_BUF_MAX 30
 782
 783 /* RTAS Userspace access */
 784 static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v)
 785 {
 786         seq_printf(m, "%016lx %x\n", rtas_rmo_buf, RTAS_RMOBUF_MAX);
 787         return 0;
 788 }