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 <asm/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
 117 /* Globals */
 118 static struct rtas_sensors sensors;
 119 static struct device_node *rtas_node = NULL;
 120 static unsigned long power_on_time = 0; /* Save the time the user set */
 121 static char progress_led[MAX_LINELENGTH];
 122
 123 static unsigned long rtas_tone_frequency = 1000;
 124 static unsigned long rtas_tone_volume = 0;
 125
 126 /* ****************STRUCTS******************************************* */
 127 struct individual_sensor {
 128         unsigned int token;
 129         unsigned int quant;
 130 };
 131
 132 struct rtas_sensors {
 133         struct individual_sensor sensor[MAX_SENSORS];
 134         unsigned int quant;
 135 };
 136
 137 /* ****************************************************************** */
 138 /* Declarations */
 139 static int ppc_rtas_sensors_show(struct seq_file *m, void *v);
 140 static int ppc_rtas_clock_show(struct seq_file *m, void *v);
 141 static ssize_t ppc_rtas_clock_write(struct file *file,
 142                 const char __user *buf, size_t count, loff_t *ppos);
 143 static int ppc_rtas_progress_show(struct seq_file *m, void *v);
 144 static ssize_t ppc_rtas_progress_write(struct file *file,
 145                 const char __user *buf, size_t count, loff_t *ppos);
 146 static int ppc_rtas_poweron_show(struct seq_file *m, void *v);
 147 static ssize_t ppc_rtas_poweron_write(struct file *file,
 148                 const char __user *buf, size_t count, loff_t *ppos);
 149
 150 static ssize_t ppc_rtas_tone_freq_write(struct file *file,
 151                 const char __user *buf, size_t count, loff_t *ppos);
 152 static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v);
 153 static ssize_t ppc_rtas_tone_volume_write(struct file *file,
 154                 const char __user *buf, size_t count, loff_t *ppos);
 155 static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v);
 156 static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v);
 157
 158 static int sensors_open(struct inode *inode, struct file *file)
 159 {
 160         return single_open(file, ppc_rtas_sensors_show, NULL);
 161 }
 162
 163 const struct file_operations ppc_rtas_sensors_operations = {
 164         .open           = sensors_open,
 165         .read           = seq_read,
 166         .llseek         = seq_lseek,
 167         .release        = single_release,
 168 };
 169
 170 static int poweron_open(struct inode *inode, struct file *file)
 171 {
 172         return single_open(file, ppc_rtas_poweron_show, NULL);
 173 }
 174
 175 const struct file_operations ppc_rtas_poweron_operations = {
 176         .open           = poweron_open,
 177         .read           = seq_read,
 178         .llseek         = seq_lseek,
 179         .write          = ppc_rtas_poweron_write,
 180         .release        = single_release,
 181 };
 182
 183 static int progress_open(struct inode *inode, struct file *file)
 184 {
 185         return single_open(file, ppc_rtas_progress_show, NULL);
 186 }
 187
 188 const struct file_operations ppc_rtas_progress_operations = {
 189         .open           = progress_open,
 190         .read           = seq_read,
 191         .llseek         = seq_lseek,
 192         .write          = ppc_rtas_progress_write,
 193         .release        = single_release,
 194 };
 195
 196 static int clock_open(struct inode *inode, struct file *file)
 197 {
 198         return single_open(file, ppc_rtas_clock_show, NULL);
 199 }
 200
 201 const struct file_operations ppc_rtas_clock_operations = {
 202         .open           = clock_open,
 203         .read           = seq_read,
 204         .llseek         = seq_lseek,
 205         .write          = ppc_rtas_clock_write,
 206         .release        = single_release,
 207 };
 208
 209 static int tone_freq_open(struct inode *inode, struct file *file)
 210 {
 211         return single_open(file, ppc_rtas_tone_freq_show, NULL);
 212 }
 213
 214 const struct file_operations ppc_rtas_tone_freq_operations = {
 215         .open           = tone_freq_open,
 216         .read           = seq_read,
 217         .llseek         = seq_lseek,
 218         .write          = ppc_rtas_tone_freq_write,
 219         .release        = single_release,
 220 };
 221
 222 static int tone_volume_open(struct inode *inode, struct file *file)
 223 {
 224         return single_open(file, ppc_rtas_tone_volume_show, NULL);
 225 }
 226
 227 const struct file_operations ppc_rtas_tone_volume_operations = {
 228         .open           = tone_volume_open,
 229         .read           = seq_read,
 230         .llseek         = seq_lseek,
 231         .write          = ppc_rtas_tone_volume_write,
 232         .release        = single_release,
 233 };
 234
 235 static int rmo_buf_open(struct inode *inode, struct file *file)
 236 {
 237         return single_open(file, ppc_rtas_rmo_buf_show, NULL);
 238 }
 239
 240 const struct file_operations ppc_rtas_rmo_buf_ops = {
 241         .open           = rmo_buf_open,
 242         .read           = seq_read,
 243         .llseek         = seq_lseek,
 244         .release        = single_release,
 245 };
 246
 247 static int ppc_rtas_find_all_sensors(void);
 248 static void ppc_rtas_process_sensor(struct seq_file *m,
 249         struct individual_sensor *s, int state, int error, const char *loc);
 250 static char *ppc_rtas_process_error(int error);
 251 static void get_location_code(struct seq_file *m,
 252         struct individual_sensor *s, const char *loc);
 253 static void check_location_string(struct seq_file *m, const char *c);
 254 static void check_location(struct seq_file *m, const char *c);
 255
 256 static int __init proc_rtas_init(void)
 257 {
 258         struct proc_dir_entry *entry;
 259
 260         if (!machine_is(pseries))
 261                 return -ENODEV;
 262
 263         rtas_node = of_find_node_by_name(NULL, "rtas");
 264         if (rtas_node == NULL)
 265                 return -ENODEV;
 266
 267         entry = create_proc_entry("ppc64/rtas/progress", S_IRUGO|S_IWUSR, NULL);
 268         if (entry)
 269                 entry->proc_fops = &ppc_rtas_progress_operations;
 270
 271         entry = create_proc_entry("ppc64/rtas/clock", S_IRUGO|S_IWUSR, NULL);
 272         if (entry)
 273                 entry->proc_fops = &ppc_rtas_clock_operations;
 274
 275         entry = create_proc_entry("ppc64/rtas/poweron", S_IWUSR|S_IRUGO, NULL);
 276         if (entry)
 277                 entry->proc_fops = &ppc_rtas_poweron_operations;
 278
 279         entry = create_proc_entry("ppc64/rtas/sensors", S_IRUGO, NULL);
 280         if (entry)
 281                 entry->proc_fops = &ppc_rtas_sensors_operations;
 282
 283         entry = create_proc_entry("ppc64/rtas/frequency", S_IWUSR|S_IRUGO,
 284                                   NULL);
 285         if (entry)
 286                 entry->proc_fops = &ppc_rtas_tone_freq_operations;
 287
 288         entry = create_proc_entry("ppc64/rtas/volume", S_IWUSR|S_IRUGO, NULL);
 289         if (entry)
 290                 entry->proc_fops = &ppc_rtas_tone_volume_operations;
 291
 292         entry = create_proc_entry("ppc64/rtas/rmo_buffer", S_IRUSR, NULL);
 293         if (entry)
 294                 entry->proc_fops = &ppc_rtas_rmo_buf_ops;
 295
 296         return 0;
 297 }
 298
 299 __initcall(proc_rtas_init);
 300
 301 static int parse_number(const char __user *p, size_t count, unsigned long *val)
 302 {
 303         char buf[40];
 304         char *end;
 305
 306         if (count > 39)
 307                 return -EINVAL;
 308
 309         if (copy_from_user(buf, p, count))
 310                 return -EFAULT;
 311
 312         buf[count] = 0;
 313
 314         *val = simple_strtoul(buf, &end, 10);
 315         if (*end && *end != '\n')
 316                 return -EINVAL;
 317
 318         return 0;
 319 }
 320
 321 /* ****************************************************************** */
 322 /* POWER-ON-TIME                                                      */
 323 /* ****************************************************************** */
 324 static ssize_t ppc_rtas_poweron_write(struct file *file,
 325                 const char __user *buf, size_t count, loff_t *ppos)
 326 {
 327         struct rtc_time tm;
 328         unsigned long nowtime;
 329         int error = parse_number(buf, count, &nowtime);
 330         if (error)
 331                 return error;
 332
 333         power_on_time = nowtime; /* save the time */
 334
 335         to_tm(nowtime, &tm);
 336
 337         error = rtas_call(rtas_token("set-time-for-power-on"), 7, 1, NULL,
 338                         tm.tm_year, tm.tm_mon, tm.tm_mday,
 339                         tm.tm_hour, tm.tm_min, tm.tm_sec, 0 /* nano */);
 340         if (error)
 341                 printk(KERN_WARNING "error: setting poweron time returned: %s\n",
 342                                 ppc_rtas_process_error(error));
 343         return count;
 344 }
 345 /* ****************************************************************** */
 346 static int ppc_rtas_poweron_show(struct seq_file *m, void *v)
 347 {
 348         if (power_on_time == 0)
 349                 seq_printf(m, "Power on time not set\n");
 350         else
 351                 seq_printf(m, "%lu\n",power_on_time);
 352         return 0;
 353 }
 354
 355 /* ****************************************************************** */
 356 /* PROGRESS                                                           */
 357 /* ****************************************************************** */
 358 static ssize_t ppc_rtas_progress_write(struct file *file,
 359                 const char __user *buf, size_t count, loff_t *ppos)
 360 {
 361         unsigned long hex;
 362
 363         if (count >= MAX_LINELENGTH)
 364                 count = MAX_LINELENGTH -1;
 365         if (copy_from_user(progress_led, buf, count)) { /* save the string */
 366                 return -EFAULT;
 367         }
 368         progress_led[count] = 0;
 369
 370         /* Lets see if the user passed hexdigits */
 371         hex = simple_strtoul(progress_led, NULL, 10);
 372
 373         rtas_progress ((char *)progress_led, hex);
 374         return count;
 375
 376         /* clear the line */
 377         /* rtas_progress("                   ", 0xffff);*/
 378 }
 379 /* ****************************************************************** */
 380 static int ppc_rtas_progress_show(struct seq_file *m, void *v)
 381 {
 382         if (progress_led[0])
 383                 seq_printf(m, "%s\n", progress_led);
 384         return 0;
 385 }
 386
 387 /* ****************************************************************** */
 388 /* CLOCK                                                              */
 389 /* ****************************************************************** */
 390 static ssize_t ppc_rtas_clock_write(struct file *file,
 391                 const char __user *buf, size_t count, loff_t *ppos)
 392 {
 393         struct rtc_time tm;
 394         unsigned long nowtime;
 395         int error = parse_number(buf, count, &nowtime);
 396         if (error)
 397                 return error;
 398
 399         to_tm(nowtime, &tm);
 400         error = rtas_call(rtas_token("set-time-of-day"), 7, 1, NULL,
 401                         tm.tm_year, tm.tm_mon, tm.tm_mday,
 402                         tm.tm_hour, tm.tm_min, tm.tm_sec, 0);
 403         if (error)
 404                 printk(KERN_WARNING "error: setting the clock returned: %s\n",
 405                                 ppc_rtas_process_error(error));
 406         return count;
 407 }
 408 /* ****************************************************************** */
 409 static int ppc_rtas_clock_show(struct seq_file *m, void *v)
 410 {
 411         int ret[8];
 412         int error = rtas_call(rtas_token("get-time-of-day"), 0, 8, ret);
 413
 414         if (error) {
 415                 printk(KERN_WARNING "error: reading the clock returned: %s\n",
 416                                 ppc_rtas_process_error(error));
 417                 seq_printf(m, "0");
 418         } else {
 419                 unsigned int year, mon, day, hour, min, sec;
 420                 year = ret[0]; mon  = ret[1]; day  = ret[2];
 421                 hour = ret[3]; min  = ret[4]; sec  = ret[5];
 422                 seq_printf(m, "%lu\n",
 423                                 mktime(year, mon, day, hour, min, sec));
 424         }
 425         return 0;
 426 }
 427
 428 /* ****************************************************************** */
 429 /* SENSOR STUFF                                                       */
 430 /* ****************************************************************** */
 431 static int ppc_rtas_sensors_show(struct seq_file *m, void *v)
 432 {
 433         int i,j;
 434         int state, error;
 435         int get_sensor_state = rtas_token("get-sensor-state");
 436
 437         seq_printf(m, "RTAS (RunTime Abstraction Services) Sensor Information\n");
 438         seq_printf(m, "Sensor\t\tValue\t\tCondition\tLocation\n");
 439         seq_printf(m, "********************************************************\n");
 440
 441         if (ppc_rtas_find_all_sensors() != 0) {
 442                 seq_printf(m, "\nNo sensors are available\n");
 443                 return 0;
 444         }
 445
 446         for (i=0; i<sensors.quant; i++) {
 447                 struct individual_sensor *p = &sensors.sensor[i];
 448                 char rstr[64];
 449                 const char *loc;
 450                 int llen, offs;
 451
 452                 sprintf (rstr, SENSOR_PREFIX"%04d", p->token);
 453                 loc = of_get_property(rtas_node, rstr, &llen);
 454
 455                 /* A sensor may have multiple instances */
 456                 for (j = 0, offs = 0; j <= p->quant; j++) {
 457                         error = rtas_call(get_sensor_state, 2, 2, &state,
 458                                           p->token, j);
 459
 460                         ppc_rtas_process_sensor(m, p, state, error, loc);
 461                         seq_putc(m, '\n');
 462                         if (loc) {
 463                                 offs += strlen(loc) + 1;
 464                                 loc += strlen(loc) + 1;
 465                                 if (offs >= llen)
 466                                         loc = NULL;
 467                         }
 468                 }
 469         }
 470         return 0;
 471 }
 472
 473 /* ****************************************************************** */
 474
 475 static int ppc_rtas_find_all_sensors(void)
 476 {
 477         const unsigned int *utmp;
 478         int len, i;
 479
 480         utmp = of_get_property(rtas_node, "rtas-sensors", &len);
 481         if (utmp == NULL) {
 482                 printk (KERN_ERR "error: could not get rtas-sensors\n");
 483                 return 1;
 484         }
 485
 486         sensors.quant = len / 8;      /* int + int */
 487
 488         for (i=0; i<sensors.quant; i++) {
 489                 sensors.sensor[i].token = *utmp++;
 490                 sensors.sensor[i].quant = *utmp++;
 491         }
 492         return 0;
 493 }
 494
 495 /* ****************************************************************** */
 496 /*
 497  * Builds a string of what rtas returned
 498  */
 499 static char *ppc_rtas_process_error(int error)
 500 {
 501         switch (error) {
 502                 case SENSOR_CRITICAL_HIGH:
 503                         return "(critical high)";
 504                 case SENSOR_WARNING_HIGH:
 505                         return "(warning high)";
 506                 case SENSOR_NORMAL:
 507                         return "(normal)";
 508                 case SENSOR_WARNING_LOW:
 509                         return "(warning low)";
 510                 case SENSOR_CRITICAL_LOW:
 511                         return "(critical low)";
 512                 case SENSOR_SUCCESS:
 513                         return "(read ok)";
 514                 case SENSOR_HW_ERROR:
 515                         return "(hardware error)";
 516                 case SENSOR_BUSY:
 517                         return "(busy)";
 518                 case SENSOR_NOT_EXIST:
 519                         return "(non existent)";
 520                 case SENSOR_DR_ENTITY:
 521                         return "(dr entity removed)";
 522                 default:
 523                         return "(UNKNOWN)";
 524         }
 525 }
 526
 527 /* ****************************************************************** */
 528 /*
 529  * Builds a string out of what the sensor said
 530  */
 531
 532 static void ppc_rtas_process_sensor(struct seq_file *m,
 533         struct individual_sensor *s, int state, int error, const char *loc)
 534 {
 535         /* Defined return vales */
 536         const char * key_switch[]        = { "Off\t", "Normal\t", "Secure\t",
 537                                                 "Maintenance" };
 538         const char * enclosure_switch[]  = { "Closed", "Open" };
 539         const char * lid_status[]        = { " ", "Open", "Closed" };
 540         const char * power_source[]      = { "AC\t", "Battery",
 541                                                 "AC & Battery" };
 542         const char * battery_remaining[] = { "Very Low", "Low", "Mid", "High" };
 543         const char * epow_sensor[]       = {
 544                 "EPOW Reset", "Cooling warning", "Power warning",
 545                 "System shutdown", "System halt", "EPOW main enclosure",
 546                 "EPOW power off" };
 547         const char * battery_cyclestate[]  = { "None", "In progress",
 548                                                 "Requested" };
 549         const char * battery_charging[]    = { "Charging", "Discharching",
 550                                                 "No current flow" };
 551         const char * ibm_drconnector[]     = { "Empty", "Present", "Unusable",
 552                                                 "Exchange" };
 553
 554         int have_strings = 0;
 555         int num_states = 0;
 556         int temperature = 0;
 557         int unknown = 0;
 558
 559         /* What kind of sensor do we have here? */
 560
 561         switch (s->token) {
 562                 case KEY_SWITCH:
 563                         seq_printf(m, "Key switch:\t");
 564                         num_states = sizeof(key_switch) / sizeof(char *);
 565                         if (state < num_states) {
 566                                 seq_printf(m, "%s\t", key_switch[state]);
 567                                 have_strings = 1;
 568                         }
 569                         break;
 570                 case ENCLOSURE_SWITCH:
 571                         seq_printf(m, "Enclosure switch:\t");
 572                         num_states = sizeof(enclosure_switch) / sizeof(char *);
 573                         if (state < num_states) {
 574                                 seq_printf(m, "%s\t",
 575                                                 enclosure_switch[state]);
 576                                 have_strings = 1;
 577                         }
 578                         break;
 579                 case THERMAL_SENSOR:
 580                         seq_printf(m, "Temp. (C/F):\t");
 581                         temperature = 1;
 582                         break;
 583                 case LID_STATUS:
 584                         seq_printf(m, "Lid status:\t");
 585                         num_states = sizeof(lid_status) / sizeof(char *);
 586                         if (state < num_states) {
 587                                 seq_printf(m, "%s\t", lid_status[state]);
 588                                 have_strings = 1;
 589                         }
 590                         break;
 591                 case POWER_SOURCE:
 592                         seq_printf(m, "Power source:\t");
 593                         num_states = sizeof(power_source) / sizeof(char *);
 594                         if (state < num_states) {
 595                                 seq_printf(m, "%s\t",
 596                                                 power_source[state]);
 597                                 have_strings = 1;
 598                         }
 599                         break;
 600                 case BATTERY_VOLTAGE:
 601                         seq_printf(m, "Battery voltage:\t");
 602                         break;
 603                 case BATTERY_REMAINING:
 604                         seq_printf(m, "Battery remaining:\t");
 605                         num_states = sizeof(battery_remaining) / sizeof(char *);
 606                         if (state < num_states)
 607                         {
 608                                 seq_printf(m, "%s\t",
 609                                                 battery_remaining[state]);
 610                                 have_strings = 1;
 611                         }
 612                         break;
 613                 case BATTERY_PERCENTAGE:
 614                         seq_printf(m, "Battery percentage:\t");
 615                         break;
 616                 case EPOW_SENSOR:
 617                         seq_printf(m, "EPOW Sensor:\t");
 618                         num_states = sizeof(epow_sensor) / sizeof(char *);
 619                         if (state < num_states) {
 620                                 seq_printf(m, "%s\t", epow_sensor[state]);
 621                                 have_strings = 1;
 622                         }
 623                         break;
 624                 case BATTERY_CYCLESTATE:
 625                         seq_printf(m, "Battery cyclestate:\t");
 626                         num_states = sizeof(battery_cyclestate) /
 627                                         sizeof(char *);
 628                         if (state < num_states) {
 629                                 seq_printf(m, "%s\t",
 630                                                 battery_cyclestate[state]);
 631                                 have_strings = 1;
 632                         }
 633                         break;
 634                 case BATTERY_CHARGING:
 635                         seq_printf(m, "Battery Charging:\t");
 636                         num_states = sizeof(battery_charging) / sizeof(char *);
 637                         if (state < num_states) {
 638                                 seq_printf(m, "%s\t",
 639                                                 battery_charging[state]);
 640                                 have_strings = 1;
 641                         }
 642                         break;
 643                 case IBM_SURVEILLANCE:
 644                         seq_printf(m, "Surveillance:\t");
 645                         break;
 646                 case IBM_FANRPM:
 647                         seq_printf(m, "Fan (rpm):\t");
 648                         break;
 649                 case IBM_VOLTAGE:
 650                         seq_printf(m, "Voltage (mv):\t");
 651                         break;
 652                 case IBM_DRCONNECTOR:
 653                         seq_printf(m, "DR connector:\t");
 654                         num_states = sizeof(ibm_drconnector) / sizeof(char *);
 655                         if (state < num_states) {
 656                                 seq_printf(m, "%s\t",
 657                                                 ibm_drconnector[state]);
 658                                 have_strings = 1;
 659                         }
 660                         break;
 661                 case IBM_POWERSUPPLY:
 662                         seq_printf(m, "Powersupply:\t");
 663                         break;
 664                 default:
 665                         seq_printf(m,  "Unknown sensor (type %d), ignoring it\n",
 666                                         s->token);
 667                         unknown = 1;
 668                         have_strings = 1;
 669                         break;
 670         }
 671         if (have_strings == 0) {
 672                 if (temperature) {
 673                         seq_printf(m, "%4d /%4d\t", state, cel_to_fahr(state));
 674                 } else
 675                         seq_printf(m, "%10d\t", state);
 676         }
 677         if (unknown == 0) {
 678                 seq_printf(m, "%s\t", ppc_rtas_process_error(error));
 679                 get_location_code(m, s, loc);
 680         }
 681 }
 682
 683 /* ****************************************************************** */
 684
 685 static void check_location(struct seq_file *m, const char *c)
 686 {
 687         switch (c[0]) {
 688                 case LOC_PLANAR:
 689                         seq_printf(m, "Planar #%c", c[1]);
 690                         break;
 691                 case LOC_CPU:
 692                         seq_printf(m, "CPU #%c", c[1]);
 693                         break;
 694                 case LOC_FAN:
 695                         seq_printf(m, "Fan #%c", c[1]);
 696                         break;
 697                 case LOC_RACKMOUNTED:
 698                         seq_printf(m, "Rack #%c", c[1]);
 699                         break;
 700                 case LOC_VOLTAGE:
 701                         seq_printf(m, "Voltage #%c", c[1]);
 702                         break;
 703                 case LOC_LCD:
 704                         seq_printf(m, "LCD #%c", c[1]);
 705                         break;
 706                 case '.':
 707                         seq_printf(m, "- %c", c[1]);
 708                         break;
 709                 default:
 710                         seq_printf(m, "Unknown location");
 711                         break;
 712         }
 713 }
 714
 715
 716 /* ****************************************************************** */
 717 /*
 718  * Format:
 719  * ${LETTER}${NUMBER}[[-/]${LETTER}${NUMBER} [ ... ] ]
 720  * the '.' may be an abbrevation
 721  */
 722 static void check_location_string(struct seq_file *m, const char *c)
 723 {
 724         while (*c) {
 725                 if (isalpha(*c) || *c == '.')
 726                         check_location(m, c);
 727                 else if (*c == '/' || *c == '-')
 728                         seq_printf(m, " at ");
 729                 c++;
 730         }
 731 }
 732
 733
 734 /* ****************************************************************** */
 735
 736 static void get_location_code(struct seq_file *m, struct individual_sensor *s,
 737                 const char *loc)
 738 {
 739         if (!loc || !*loc) {
 740                 seq_printf(m, "---");/* does not have a location */
 741         } else {
 742                 check_location_string(m, loc);
 743         }
 744         seq_putc(m, ' ');
 745 }
 746 /* ****************************************************************** */
 747 /* INDICATORS - Tone Frequency                                        */
 748 /* ****************************************************************** */
 749 static ssize_t ppc_rtas_tone_freq_write(struct file *file,
 750                 const char __user *buf, size_t count, loff_t *ppos)
 751 {
 752         unsigned long freq;
 753         int error = parse_number(buf, count, &freq);
 754         if (error)
 755                 return error;
 756
 757         rtas_tone_frequency = freq; /* save it for later */
 758         error = rtas_call(rtas_token("set-indicator"), 3, 1, NULL,
 759                         TONE_FREQUENCY, 0, freq);
 760         if (error)
 761                 printk(KERN_WARNING "error: setting tone frequency returned: %s\n",
 762                                 ppc_rtas_process_error(error));
 763         return count;
 764 }
 765 /* ****************************************************************** */
 766 static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v)
 767 {
 768         seq_printf(m, "%lu\n", rtas_tone_frequency);
 769         return 0;
 770 }
 771 /* ****************************************************************** */
 772 /* INDICATORS - Tone Volume                                           */
 773 /* ****************************************************************** */
 774 static ssize_t ppc_rtas_tone_volume_write(struct file *file,
 775                 const char __user *buf, size_t count, loff_t *ppos)
 776 {
 777         unsigned long volume;
 778         int error = parse_number(buf, count, &volume);
 779         if (error)
 780                 return error;
 781
 782         if (volume > 100)
 783                 volume = 100;
 784
 785         rtas_tone_volume = volume; /* save it for later */
 786         error = rtas_call(rtas_token("set-indicator"), 3, 1, NULL,
 787                         TONE_VOLUME, 0, volume);
 788         if (error)
 789                 printk(KERN_WARNING "error: setting tone volume returned: %s\n",
 790                                 ppc_rtas_process_error(error));
 791         return count;
 792 }
 793 /* ****************************************************************** */
 794 static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v)
 795 {
 796         seq_printf(m, "%lu\n", rtas_tone_volume);
 797         return 0;
 798 }
 799
 800 #define RMO_READ_BUF_MAX 30
 801
 802 /* RTAS Userspace access */
 803 static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v)
 804 {
 805         seq_printf(m, "%016lx %x\n", rtas_rmo_buf, RTAS_RMOBUF_MAX);
 806         return 0;
 807 }