release/src-rt-6.x.4708/linux/linux-2.6.36/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 static 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 static 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 static 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 static 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 static 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 static 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 static 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         if (!machine_is(pseries))
 259                 return -ENODEV;
 260
 261         rtas_node = of_find_node_by_name(NULL, "rtas");
 262         if (rtas_node == NULL)
 263                 return -ENODEV;
 264
 265         proc_create("powerpc/rtas/progress", S_IRUGO|S_IWUSR, NULL,
 266                     &ppc_rtas_progress_operations);
 267         proc_create("powerpc/rtas/clock", S_IRUGO|S_IWUSR, NULL,
 268                     &ppc_rtas_clock_operations);
 269         proc_create("powerpc/rtas/poweron", S_IWUSR|S_IRUGO, NULL,
 270                     &ppc_rtas_poweron_operations);
 271         proc_create("powerpc/rtas/sensors", S_IRUGO, NULL,
 272                     &ppc_rtas_sensors_operations);
 273         proc_create("powerpc/rtas/frequency", S_IWUSR|S_IRUGO, NULL,
 274                     &ppc_rtas_tone_freq_operations);
 275         proc_create("powerpc/rtas/volume", S_IWUSR|S_IRUGO, NULL,
 276                     &ppc_rtas_tone_volume_operations);
 277         proc_create("powerpc/rtas/rmo_buffer", S_IRUSR, NULL,
 278                     &ppc_rtas_rmo_buf_ops);
 279         return 0;
 280 }
 281
 282 __initcall(proc_rtas_init);
 283
 284 static int parse_number(const char __user *p, size_t count, unsigned long *val)
 285 {
 286         char buf[40];
 287         char *end;
 288
 289         if (count > 39)
 290                 return -EINVAL;
 291
 292         if (copy_from_user(buf, p, count))
 293                 return -EFAULT;
 294
 295         buf[count] = 0;
 296
 297         *val = simple_strtoul(buf, &end, 10);
 298         if (*end && *end != '\n')
 299                 return -EINVAL;
 300
 301         return 0;
 302 }
 303
 304 /* ****************************************************************** */
 305 /* POWER-ON-TIME                                                      */
 306 /* ****************************************************************** */
 307 static ssize_t ppc_rtas_poweron_write(struct file *file,
 308                 const char __user *buf, size_t count, loff_t *ppos)
 309 {
 310         struct rtc_time tm;
 311         unsigned long nowtime;
 312         int error = parse_number(buf, count, &nowtime);
 313         if (error)
 314                 return error;
 315
 316         power_on_time = nowtime; /* save the time */
 317
 318         to_tm(nowtime, &tm);
 319
 320         error = rtas_call(rtas_token("set-time-for-power-on"), 7, 1, NULL,
 321                         tm.tm_year, tm.tm_mon, tm.tm_mday,
 322                         tm.tm_hour, tm.tm_min, tm.tm_sec, 0 /* nano */);
 323         if (error)
 324                 printk(KERN_WARNING "error: setting poweron time returned: %s\n",
 325                                 ppc_rtas_process_error(error));
 326         return count;
 327 }
 328 /* ****************************************************************** */
 329 static int ppc_rtas_poweron_show(struct seq_file *m, void *v)
 330 {
 331         if (power_on_time == 0)
 332                 seq_printf(m, "Power on time not set\n");
 333         else
 334                 seq_printf(m, "%lu\n",power_on_time);
 335         return 0;
 336 }
 337
 338 /* ****************************************************************** */
 339 /* PROGRESS                                                           */
 340 /* ****************************************************************** */
 341 static ssize_t ppc_rtas_progress_write(struct file *file,
 342                 const char __user *buf, size_t count, loff_t *ppos)
 343 {
 344         unsigned long hex;
 345
 346         if (count >= MAX_LINELENGTH)
 347                 count = MAX_LINELENGTH -1;
 348         if (copy_from_user(progress_led, buf, count)) { /* save the string */
 349                 return -EFAULT;
 350         }
 351         progress_led[count] = 0;
 352
 353         /* Lets see if the user passed hexdigits */
 354         hex = simple_strtoul(progress_led, NULL, 10);
 355
 356         rtas_progress ((char *)progress_led, hex);
 357         return count;
 358
 359         /* clear the line */
 360         /* rtas_progress("                   ", 0xffff);*/
 361 }
 362 /* ****************************************************************** */
 363 static int ppc_rtas_progress_show(struct seq_file *m, void *v)
 364 {
 365         if (progress_led[0])
 366                 seq_printf(m, "%s\n", progress_led);
 367         return 0;
 368 }
 369
 370 /* ****************************************************************** */
 371 /* CLOCK                                                              */
 372 /* ****************************************************************** */
 373 static ssize_t ppc_rtas_clock_write(struct file *file,
 374                 const char __user *buf, size_t count, loff_t *ppos)
 375 {
 376         struct rtc_time tm;
 377         unsigned long nowtime;
 378         int error = parse_number(buf, count, &nowtime);
 379         if (error)
 380                 return error;
 381
 382         to_tm(nowtime, &tm);
 383         error = rtas_call(rtas_token("set-time-of-day"), 7, 1, NULL,
 384                         tm.tm_year, tm.tm_mon, tm.tm_mday,
 385                         tm.tm_hour, tm.tm_min, tm.tm_sec, 0);
 386         if (error)
 387                 printk(KERN_WARNING "error: setting the clock returned: %s\n",
 388                                 ppc_rtas_process_error(error));
 389         return count;
 390 }
 391 /* ****************************************************************** */
 392 static int ppc_rtas_clock_show(struct seq_file *m, void *v)
 393 {
 394         int ret[8];
 395         int error = rtas_call(rtas_token("get-time-of-day"), 0, 8, ret);
 396
 397         if (error) {
 398                 printk(KERN_WARNING "error: reading the clock returned: %s\n",
 399                                 ppc_rtas_process_error(error));
 400                 seq_printf(m, "0");
 401         } else {
 402                 unsigned int year, mon, day, hour, min, sec;
 403                 year = ret[0]; mon  = ret[1]; day  = ret[2];
 404                 hour = ret[3]; min  = ret[4]; sec  = ret[5];
 405                 seq_printf(m, "%lu\n",
 406                                 mktime(year, mon, day, hour, min, sec));
 407         }
 408         return 0;
 409 }
 410
 411 /* ****************************************************************** */
 412 /* SENSOR STUFF                                                       */
 413 /* ****************************************************************** */
 414 static int ppc_rtas_sensors_show(struct seq_file *m, void *v)
 415 {
 416         int i,j;
 417         int state, error;
 418         int get_sensor_state = rtas_token("get-sensor-state");
 419
 420         seq_printf(m, "RTAS (RunTime Abstraction Services) Sensor Information\n");
 421         seq_printf(m, "Sensor\t\tValue\t\tCondition\tLocation\n");
 422         seq_printf(m, "********************************************************\n");
 423
 424         if (ppc_rtas_find_all_sensors() != 0) {
 425                 seq_printf(m, "\nNo sensors are available\n");
 426                 return 0;
 427         }
 428
 429         for (i=0; i<sensors.quant; i++) {
 430                 struct individual_sensor *p = &sensors.sensor[i];
 431                 char rstr[64];
 432                 const char *loc;
 433                 int llen, offs;
 434
 435                 sprintf (rstr, SENSOR_PREFIX"%04d", p->token);
 436                 loc = of_get_property(rtas_node, rstr, &llen);
 437
 438                 /* A sensor may have multiple instances */
 439                 for (j = 0, offs = 0; j <= p->quant; j++) {
 440                         error = rtas_call(get_sensor_state, 2, 2, &state,
 441                                           p->token, j);
 442
 443                         ppc_rtas_process_sensor(m, p, state, error, loc);
 444                         seq_putc(m, '\n');
 445                         if (loc) {
 446                                 offs += strlen(loc) + 1;
 447                                 loc += strlen(loc) + 1;
 448                                 if (offs >= llen)
 449                                         loc = NULL;
 450                         }
 451                 }
 452         }
 453         return 0;
 454 }
 455
 456 /* ****************************************************************** */
 457
 458 static int ppc_rtas_find_all_sensors(void)
 459 {
 460         const unsigned int *utmp;
 461         int len, i;
 462
 463         utmp = of_get_property(rtas_node, "rtas-sensors", &len);
 464         if (utmp == NULL) {
 465                 printk (KERN_ERR "error: could not get rtas-sensors\n");
 466                 return 1;
 467         }
 468
 469         sensors.quant = len / 8;      /* int + int */
 470
 471         for (i=0; i<sensors.quant; i++) {
 472                 sensors.sensor[i].token = *utmp++;
 473                 sensors.sensor[i].quant = *utmp++;
 474         }
 475         return 0;
 476 }
 477
 478 /* ****************************************************************** */
 479 /*
 480  * Builds a string of what rtas returned
 481  */
 482 static char *ppc_rtas_process_error(int error)
 483 {
 484         switch (error) {
 485                 case SENSOR_CRITICAL_HIGH:
 486                         return "(critical high)";
 487                 case SENSOR_WARNING_HIGH:
 488                         return "(warning high)";
 489                 case SENSOR_NORMAL:
 490                         return "(normal)";
 491                 case SENSOR_WARNING_LOW:
 492                         return "(warning low)";
 493                 case SENSOR_CRITICAL_LOW:
 494                         return "(critical low)";
 495                 case SENSOR_SUCCESS:
 496                         return "(read ok)";
 497                 case SENSOR_HW_ERROR:
 498                         return "(hardware error)";
 499                 case SENSOR_BUSY:
 500                         return "(busy)";
 501                 case SENSOR_NOT_EXIST:
 502                         return "(non existent)";
 503                 case SENSOR_DR_ENTITY:
 504                         return "(dr entity removed)";
 505                 default:
 506                         return "(UNKNOWN)";
 507         }
 508 }
 509
 510 /* ****************************************************************** */
 511 /*
 512  * Builds a string out of what the sensor said
 513  */
 514
 515 static void ppc_rtas_process_sensor(struct seq_file *m,
 516         struct individual_sensor *s, int state, int error, const char *loc)
 517 {
 518         /* Defined return vales */
 519         const char * key_switch[]        = { "Off\t", "Normal\t", "Secure\t",
 520                                                 "Maintenance" };
 521         const char * enclosure_switch[]  = { "Closed", "Open" };
 522         const char * lid_status[]        = { " ", "Open", "Closed" };
 523         const char * power_source[]      = { "AC\t", "Battery",
 524                                                 "AC & Battery" };
 525         const char * battery_remaining[] = { "Very Low", "Low", "Mid", "High" };
 526         const char * epow_sensor[]       = {
 527                 "EPOW Reset", "Cooling warning", "Power warning",
 528                 "System shutdown", "System halt", "EPOW main enclosure",
 529                 "EPOW power off" };
 530         const char * battery_cyclestate[]  = { "None", "In progress",
 531                                                 "Requested" };
 532         const char * battery_charging[]    = { "Charging", "Discharching",
 533                                                 "No current flow" };
 534         const char * ibm_drconnector[]     = { "Empty", "Present", "Unusable",
 535                                                 "Exchange" };
 536
 537         int have_strings = 0;
 538         int num_states = 0;
 539         int temperature = 0;
 540         int unknown = 0;
 541
 542         /* What kind of sensor do we have here? */
 543
 544         switch (s->token) {
 545                 case KEY_SWITCH:
 546                         seq_printf(m, "Key switch:\t");
 547                         num_states = sizeof(key_switch) / sizeof(char *);
 548                         if (state < num_states) {
 549                                 seq_printf(m, "%s\t", key_switch[state]);
 550                                 have_strings = 1;
 551                         }
 552                         break;
 553                 case ENCLOSURE_SWITCH:
 554                         seq_printf(m, "Enclosure switch:\t");
 555                         num_states = sizeof(enclosure_switch) / sizeof(char *);
 556                         if (state < num_states) {
 557                                 seq_printf(m, "%s\t",
 558                                                 enclosure_switch[state]);
 559                                 have_strings = 1;
 560                         }
 561                         break;
 562                 case THERMAL_SENSOR:
 563                         seq_printf(m, "Temp. (C/F):\t");
 564                         temperature = 1;
 565                         break;
 566                 case LID_STATUS:
 567                         seq_printf(m, "Lid status:\t");
 568                         num_states = sizeof(lid_status) / sizeof(char *);
 569                         if (state < num_states) {
 570                                 seq_printf(m, "%s\t", lid_status[state]);
 571                                 have_strings = 1;
 572                         }
 573                         break;
 574                 case POWER_SOURCE:
 575                         seq_printf(m, "Power source:\t");
 576                         num_states = sizeof(power_source) / sizeof(char *);
 577                         if (state < num_states) {
 578                                 seq_printf(m, "%s\t",
 579                                                 power_source[state]);
 580                                 have_strings = 1;
 581                         }
 582                         break;
 583                 case BATTERY_VOLTAGE:
 584                         seq_printf(m, "Battery voltage:\t");
 585                         break;
 586                 case BATTERY_REMAINING:
 587                         seq_printf(m, "Battery remaining:\t");
 588                         num_states = sizeof(battery_remaining) / sizeof(char *);
 589                         if (state < num_states)
 590                         {
 591                                 seq_printf(m, "%s\t",
 592                                                 battery_remaining[state]);
 593                                 have_strings = 1;
 594                         }
 595                         break;
 596                 case BATTERY_PERCENTAGE:
 597                         seq_printf(m, "Battery percentage:\t");
 598                         break;
 599                 case EPOW_SENSOR:
 600                         seq_printf(m, "EPOW Sensor:\t");
 601                         num_states = sizeof(epow_sensor) / sizeof(char *);
 602                         if (state < num_states) {
 603                                 seq_printf(m, "%s\t", epow_sensor[state]);
 604                                 have_strings = 1;
 605                         }
 606                         break;
 607                 case BATTERY_CYCLESTATE:
 608                         seq_printf(m, "Battery cyclestate:\t");
 609                         num_states = sizeof(battery_cyclestate) /
 610                                         sizeof(char *);
 611                         if (state < num_states) {
 612                                 seq_printf(m, "%s\t",
 613                                                 battery_cyclestate[state]);
 614                                 have_strings = 1;
 615                         }
 616                         break;
 617                 case BATTERY_CHARGING:
 618                         seq_printf(m, "Battery Charging:\t");
 619                         num_states = sizeof(battery_charging) / sizeof(char *);
 620                         if (state < num_states) {
 621                                 seq_printf(m, "%s\t",
 622                                                 battery_charging[state]);
 623                                 have_strings = 1;
 624                         }
 625                         break;
 626                 case IBM_SURVEILLANCE:
 627                         seq_printf(m, "Surveillance:\t");
 628                         break;
 629                 case IBM_FANRPM:
 630                         seq_printf(m, "Fan (rpm):\t");
 631                         break;
 632                 case IBM_VOLTAGE:
 633                         seq_printf(m, "Voltage (mv):\t");
 634                         break;
 635                 case IBM_DRCONNECTOR:
 636                         seq_printf(m, "DR connector:\t");
 637                         num_states = sizeof(ibm_drconnector) / sizeof(char *);
 638                         if (state < num_states) {
 639                                 seq_printf(m, "%s\t",
 640                                                 ibm_drconnector[state]);
 641                                 have_strings = 1;
 642                         }
 643                         break;
 644                 case IBM_POWERSUPPLY:
 645                         seq_printf(m, "Powersupply:\t");
 646                         break;
 647                 default:
 648                         seq_printf(m,  "Unknown sensor (type %d), ignoring it\n",
 649                                         s->token);
 650                         unknown = 1;
 651                         have_strings = 1;
 652                         break;
 653         }
 654         if (have_strings == 0) {
 655                 if (temperature) {
 656                         seq_printf(m, "%4d /%4d\t", state, cel_to_fahr(state));
 657                 } else
 658                         seq_printf(m, "%10d\t", state);
 659         }
 660         if (unknown == 0) {
 661                 seq_printf(m, "%s\t", ppc_rtas_process_error(error));
 662                 get_location_code(m, s, loc);
 663         }
 664 }
 665
 666 /* ****************************************************************** */
 667
 668 static void check_location(struct seq_file *m, const char *c)
 669 {
 670         switch (c[0]) {
 671                 case LOC_PLANAR:
 672                         seq_printf(m, "Planar #%c", c[1]);
 673                         break;
 674                 case LOC_CPU:
 675                         seq_printf(m, "CPU #%c", c[1]);
 676                         break;
 677                 case LOC_FAN:
 678                         seq_printf(m, "Fan #%c", c[1]);
 679                         break;
 680                 case LOC_RACKMOUNTED:
 681                         seq_printf(m, "Rack #%c", c[1]);
 682                         break;
 683                 case LOC_VOLTAGE:
 684                         seq_printf(m, "Voltage #%c", c[1]);
 685                         break;
 686                 case LOC_LCD:
 687                         seq_printf(m, "LCD #%c", c[1]);
 688                         break;
 689                 case '.':
 690                         seq_printf(m, "- %c", c[1]);
 691                         break;
 692                 default:
 693                         seq_printf(m, "Unknown location");
 694                         break;
 695         }
 696 }
 697
 698
 699 /* ****************************************************************** */
 700 /*
 701  * Format:
 702  * ${LETTER}${NUMBER}[[-/]${LETTER}${NUMBER} [ ... ] ]
 703  * the '.' may be an abbrevation
 704  */
 705 static void check_location_string(struct seq_file *m, const char *c)
 706 {
 707         while (*c) {
 708                 if (isalpha(*c) || *c == '.')
 709                         check_location(m, c);
 710                 else if (*c == '/' || *c == '-')
 711                         seq_printf(m, " at ");
 712                 c++;
 713         }
 714 }
 715
 716
 717 /* ****************************************************************** */
 718
 719 static void get_location_code(struct seq_file *m, struct individual_sensor *s,
 720                 const char *loc)
 721 {
 722         if (!loc || !*loc) {
 723                 seq_printf(m, "---");/* does not have a location */
 724         } else {
 725                 check_location_string(m, loc);
 726         }
 727         seq_putc(m, ' ');
 728 }
 729 /* ****************************************************************** */
 730 /* INDICATORS - Tone Frequency                                        */
 731 /* ****************************************************************** */
 732 static ssize_t ppc_rtas_tone_freq_write(struct file *file,
 733                 const char __user *buf, size_t count, loff_t *ppos)
 734 {
 735         unsigned long freq;
 736         int error = parse_number(buf, count, &freq);
 737         if (error)
 738                 return error;
 739
 740         rtas_tone_frequency = freq; /* save it for later */
 741         error = rtas_call(rtas_token("set-indicator"), 3, 1, NULL,
 742                         TONE_FREQUENCY, 0, freq);
 743         if (error)
 744                 printk(KERN_WARNING "error: setting tone frequency returned: %s\n",
 745                                 ppc_rtas_process_error(error));
 746         return count;
 747 }
 748 /* ****************************************************************** */
 749 static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v)
 750 {
 751         seq_printf(m, "%lu\n", rtas_tone_frequency);
 752         return 0;
 753 }
 754 /* ****************************************************************** */
 755 /* INDICATORS - Tone Volume                                           */
 756 /* ****************************************************************** */
 757 static ssize_t ppc_rtas_tone_volume_write(struct file *file,
 758                 const char __user *buf, size_t count, loff_t *ppos)
 759 {
 760         unsigned long volume;
 761         int error = parse_number(buf, count, &volume);
 762         if (error)
 763                 return error;
 764
 765         if (volume > 100)
 766                 volume = 100;
 767
 768         rtas_tone_volume = volume; /* save it for later */
 769         error = rtas_call(rtas_token("set-indicator"), 3, 1, NULL,
 770                         TONE_VOLUME, 0, volume);
 771         if (error)
 772                 printk(KERN_WARNING "error: setting tone volume returned: %s\n",
 773                                 ppc_rtas_process_error(error));
 774         return count;
 775 }
 776 /* ****************************************************************** */
 777 static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v)
 778 {
 779         seq_printf(m, "%lu\n", rtas_tone_volume);
 780         return 0;
 781 }
 782
 783 #define RMO_READ_BUF_MAX 30
 784
 785 /* RTAS Userspace access */
 786 static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v)
 787 {
 788         seq_printf(m, "%016lx %x\n", rtas_rmo_buf, RTAS_RMOBUF_MAX);
 789         return 0;
 790 }