git.oblomov.eu Git - linux-2.6/blob - arch/powerpc/kernel/rtas-proc.c

   1 /*
   2  *   arch/ppc64/kernel/rtas-proc.c
   3  *   Copyright (C) 2000 Tilmann Bitterberg
   4  *   (tilmann@bitterberg.de)
   5  *
   6  *   RTAS (Runtime Abstraction Services) stuff
   7  *   Intention is to provide a clean user interface
   8  *   to use the RTAS.
   9  *
  10  *   TODO:
  11  *   Split off a header file and maybe move it to a different
  12  *   location. Write Documentation on what the /proc/rtas/ entries
  13  *   actually do.
  14  */
  15
  16 #include <linux/errno.h>
  17 #include <linux/sched.h>
  18 #include <linux/proc_fs.h>
  19 #include <linux/stat.h>
  20 #include <linux/ctype.h>
  21 #include <linux/time.h>
  22 #include <linux/string.h>
  23 #include <linux/init.h>
  24 #include <linux/seq_file.h>
  25 #include <linux/bitops.h>
  26 #include <linux/rtc.h>
  27
  28 #include <asm/uaccess.h>
  29 #include <asm/processor.h>
  30 #include <asm/io.h>
  31 #include <asm/prom.h>
  32 #include <asm/rtas.h>
  33 #include <asm/machdep.h> /* for ppc_md */
  34 #include <asm/time.h>
  35
  36 /* Token for Sensors */
  37 #define KEY_SWITCH              0x0001
  38 #define ENCLOSURE_SWITCH        0x0002
  39 #define THERMAL_SENSOR          0x0003
  40 #define LID_STATUS              0x0004
  41 #define POWER_SOURCE            0x0005
  42 #define BATTERY_VOLTAGE         0x0006
  43 #define BATTERY_REMAINING       0x0007
  44 #define BATTERY_PERCENTAGE      0x0008
  45 #define EPOW_SENSOR             0x0009
  46 #define BATTERY_CYCLESTATE      0x000a
  47 #define BATTERY_CHARGING        0x000b
  48
  49 /* IBM specific sensors */
  50 #define IBM_SURVEILLANCE        0x2328 /* 9000 */
  51 #define IBM_FANRPM              0x2329 /* 9001 */
  52 #define IBM_VOLTAGE             0x232a /* 9002 */
  53 #define IBM_DRCONNECTOR         0x232b /* 9003 */
  54 #define IBM_POWERSUPPLY         0x232c /* 9004 */
  55
  56 /* Status return values */
  57 #define SENSOR_CRITICAL_HIGH    13
  58 #define SENSOR_WARNING_HIGH     12
  59 #define SENSOR_NORMAL           11
  60 #define SENSOR_WARNING_LOW      10
  61 #define SENSOR_CRITICAL_LOW      9
  62 #define SENSOR_SUCCESS           0
  63 #define SENSOR_HW_ERROR         -1
  64 #define SENSOR_BUSY             -2
  65 #define SENSOR_NOT_EXIST        -3
  66 #define SENSOR_DR_ENTITY        -9000
  67
  68 /* Location Codes */
  69 #define LOC_SCSI_DEV_ADDR       'A'
  70 #define LOC_SCSI_DEV_LOC        'B'
  71 #define LOC_CPU                 'C'
  72 #define LOC_DISKETTE            'D'
  73 #define LOC_ETHERNET            'E'
  74 #define LOC_FAN                 'F'
  75 #define LOC_GRAPHICS            'G'
  76 /* reserved / not used          'H' */
  77 #define LOC_IO_ADAPTER          'I'
  78 /* reserved / not used          'J' */
  79 #define LOC_KEYBOARD            'K'
  80 #define LOC_LCD                 'L'
  81 #define LOC_MEMORY              'M'
  82 #define LOC_NV_MEMORY           'N'
  83 #define LOC_MOUSE               'O'
  84 #define LOC_PLANAR              'P'
  85 #define LOC_OTHER_IO            'Q'
  86 #define LOC_PARALLEL            'R'
  87 #define LOC_SERIAL              'S'
  88 #define LOC_DEAD_RING           'T'
  89 #define LOC_RACKMOUNTED         'U' /* for _u_nit is rack mounted */
  90 #define LOC_VOLTAGE             'V'
  91 #define LOC_SWITCH_ADAPTER      'W'
  92 #define LOC_OTHER               'X'
  93 #define LOC_FIRMWARE            'Y'
  94 #define LOC_SCSI                'Z'
  95
  96 /* Tokens for indicators */
  97 #define TONE_FREQUENCY          0x0001 /* 0 - 1000 (HZ)*/
  98 #define TONE_VOLUME             0x0002 /* 0 - 100 (%) */
  99 #define SYSTEM_POWER_STATE      0x0003
 100 #define WARNING_LIGHT           0x0004
 101 #define DISK_ACTIVITY_LIGHT     0x0005
 102 #define HEX_DISPLAY_UNIT        0x0006
 103 #define BATTERY_WARNING_TIME    0x0007
 104 #define CONDITION_CYCLE_REQUEST 0x0008
 105 #define SURVEILLANCE_INDICATOR  0x2328 /* 9000 */
 106 #define DR_ACTION               0x2329 /* 9001 */
 107 #define DR_INDICATOR            0x232a /* 9002 */
 108 /* 9003 - 9004: Vendor specific */
 109 /* 9006 - 9999: Vendor specific */
 110
 111 /* other */
 112 #define MAX_SENSORS              17  /* I only know of 17 sensors */
 113 #define MAX_LINELENGTH          256
 114 #define SENSOR_PREFIX           "ibm,sensor-"
 115 #define cel_to_fahr(x)          ((x*9/5)+32)
 116
 117
 118 /* Globals */
 119 static struct rtas_sensors sensors;
 120 static struct device_node *rtas_node = NULL;
 121 static unsigned long power_on_time = 0; /* Save the time the user set */
 122 static char progress_led[MAX_LINELENGTH];
 123
 124 static unsigned long rtas_tone_frequency = 1000;
 125 static unsigned long rtas_tone_volume = 0;
 126
 127 /* ****************STRUCTS******************************************* */
 128 struct individual_sensor {
 129         unsigned int token;
 130         unsigned int quant;
 131 };
 132
 133 struct rtas_sensors {
 134         struct individual_sensor sensor[MAX_SENSORS];
 135         unsigned int quant;
 136 };
 137
 138 /* ****************************************************************** */
 139 /* Declarations */
 140 static int ppc_rtas_sensors_show(struct seq_file *m, void *v);
 141 static int ppc_rtas_clock_show(struct seq_file *m, void *v);
 142 static ssize_t ppc_rtas_clock_write(struct file *file,
 143                 const char __user *buf, size_t count, loff_t *ppos);
 144 static int ppc_rtas_progress_show(struct seq_file *m, void *v);
 145 static ssize_t ppc_rtas_progress_write(struct file *file,
 146                 const char __user *buf, size_t count, loff_t *ppos);
 147 static int ppc_rtas_poweron_show(struct seq_file *m, void *v);
 148 static ssize_t ppc_rtas_poweron_write(struct file *file,
 149                 const char __user *buf, size_t count, loff_t *ppos);
 150
 151 static ssize_t ppc_rtas_tone_freq_write(struct file *file,
 152                 const char __user *buf, size_t count, loff_t *ppos);
 153 static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v);
 154 static ssize_t ppc_rtas_tone_volume_write(struct file *file,
 155                 const char __user *buf, size_t count, loff_t *ppos);
 156 static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v);
 157 static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v);
 158
 159 static int sensors_open(struct inode *inode, struct file *file)
 160 {
 161         return single_open(file, ppc_rtas_sensors_show, NULL);
 162 }
 163
 164 struct file_operations ppc_rtas_sensors_operations = {
 165         .open           = sensors_open,
 166         .read           = seq_read,
 167         .llseek         = seq_lseek,
 168         .release        = single_release,
 169 };
 170
 171 static int poweron_open(struct inode *inode, struct file *file)
 172 {
 173         return single_open(file, ppc_rtas_poweron_show, NULL);
 174 }
 175
 176 struct file_operations ppc_rtas_poweron_operations = {
 177         .open           = poweron_open,
 178         .read           = seq_read,
 179         .llseek         = seq_lseek,
 180         .write          = ppc_rtas_poweron_write,
 181         .release        = single_release,
 182 };
 183
 184 static int progress_open(struct inode *inode, struct file *file)
 185 {
 186         return single_open(file, ppc_rtas_progress_show, NULL);
 187 }
 188
 189 struct file_operations ppc_rtas_progress_operations = {
 190         .open           = progress_open,
 191         .read           = seq_read,
 192         .llseek         = seq_lseek,
 193         .write          = ppc_rtas_progress_write,
 194         .release        = single_release,
 195 };
 196
 197 static int clock_open(struct inode *inode, struct file *file)
 198 {
 199         return single_open(file, ppc_rtas_clock_show, NULL);
 200 }
 201
 202 struct file_operations ppc_rtas_clock_operations = {
 203         .open           = clock_open,
 204         .read           = seq_read,
 205         .llseek         = seq_lseek,
 206         .write          = ppc_rtas_clock_write,
 207         .release        = single_release,
 208 };
 209
 210 static int tone_freq_open(struct inode *inode, struct file *file)
 211 {
 212         return single_open(file, ppc_rtas_tone_freq_show, NULL);
 213 }
 214
 215 struct file_operations ppc_rtas_tone_freq_operations = {
 216         .open           = tone_freq_open,
 217         .read           = seq_read,
 218         .llseek         = seq_lseek,
 219         .write          = ppc_rtas_tone_freq_write,
 220         .release        = single_release,
 221 };
 222
 223 static int tone_volume_open(struct inode *inode, struct file *file)
 224 {
 225         return single_open(file, ppc_rtas_tone_volume_show, NULL);
 226 }
 227
 228 struct file_operations ppc_rtas_tone_volume_operations = {
 229         .open           = tone_volume_open,
 230         .read           = seq_read,
 231         .llseek         = seq_lseek,
 232         .write          = ppc_rtas_tone_volume_write,
 233         .release        = single_release,
 234 };
 235
 236 static int rmo_buf_open(struct inode *inode, struct file *file)
 237 {
 238         return single_open(file, ppc_rtas_rmo_buf_show, NULL);
 239 }
 240
 241 struct file_operations ppc_rtas_rmo_buf_ops = {
 242         .open           = rmo_buf_open,
 243         .read           = seq_read,
 244         .llseek         = seq_lseek,
 245         .release        = single_release,
 246 };
 247
 248 static int ppc_rtas_find_all_sensors(void);
 249 static void ppc_rtas_process_sensor(struct seq_file *m,
 250         struct individual_sensor *s, int state, int error, char *loc);
 251 static char *ppc_rtas_process_error(int error);
 252 static void get_location_code(struct seq_file *m,
 253         struct individual_sensor *s, char *loc);
 254 static void check_location_string(struct seq_file *m, char *c);
 255 static void check_location(struct seq_file *m, char *c);
 256
 257 static int __init proc_rtas_init(void)
 258 {
 259         struct proc_dir_entry *entry;
 260
 261         if (_machine != PLATFORM_PSERIES && _machine != PLATFORM_PSERIES_LPAR)
 262                 return 1;
 263
 264         rtas_node = of_find_node_by_name(NULL, "rtas");
 265         if (rtas_node == NULL)
 266                 return 1;
 267
 268         entry = create_proc_entry("ppc64/rtas/progress", S_IRUGO|S_IWUSR, NULL);
 269         if (entry)
 270                 entry->proc_fops = &ppc_rtas_progress_operations;
 271
 272         entry = create_proc_entry("ppc64/rtas/clock", S_IRUGO|S_IWUSR, NULL);
 273         if (entry)
 274                 entry->proc_fops = &ppc_rtas_clock_operations;
 275
 276         entry = create_proc_entry("ppc64/rtas/poweron", S_IWUSR|S_IRUGO, NULL);
 277         if (entry)
 278                 entry->proc_fops = &ppc_rtas_poweron_operations;
 279
 280         entry = create_proc_entry("ppc64/rtas/sensors", S_IRUGO, NULL);
 281         if (entry)
 282                 entry->proc_fops = &ppc_rtas_sensors_operations;
 283
 284         entry = create_proc_entry("ppc64/rtas/frequency", S_IWUSR|S_IRUGO,
 285                                   NULL);
 286         if (entry)
 287                 entry->proc_fops = &ppc_rtas_tone_freq_operations;
 288
 289         entry = create_proc_entry("ppc64/rtas/volume", S_IWUSR|S_IRUGO, NULL);
 290         if (entry)
 291                 entry->proc_fops = &ppc_rtas_tone_volume_operations;
 292
 293         entry = create_proc_entry("ppc64/rtas/rmo_buffer", S_IRUSR, NULL);
 294         if (entry)
 295                 entry->proc_fops = &ppc_rtas_rmo_buf_ops;
 296
 297         return 0;
 298 }
 299
 300 __initcall(proc_rtas_init);
 301
 302 static int parse_number(const char __user *p, size_t count, unsigned long *val)
 303 {
 304         char buf[40];
 305         char *end;
 306
 307         if (count > 39)
 308                 return -EINVAL;
 309
 310         if (copy_from_user(buf, p, count))
 311                 return -EFAULT;
 312
 313         buf[count] = 0;
 314
 315         *val = simple_strtoul(buf, &end, 10);
 316         if (*end && *end != '\n')
 317                 return -EINVAL;
 318
 319         return 0;
 320 }
 321
 322 /* ****************************************************************** */
 323 /* POWER-ON-TIME                                                      */
 324 /* ****************************************************************** */
 325 static ssize_t ppc_rtas_poweron_write(struct file *file,
 326                 const char __user *buf, size_t count, loff_t *ppos)
 327 {
 328         struct rtc_time tm;
 329         unsigned long nowtime;
 330         int error = parse_number(buf, count, &nowtime);
 331         if (error)
 332                 return error;
 333
 334         power_on_time = nowtime; /* save the time */
 335
 336         to_tm(nowtime, &tm);
 337
 338         error = rtas_call(rtas_token("set-time-for-power-on"), 7, 1, NULL,
 339                         tm.tm_year, tm.tm_mon, tm.tm_mday,
 340                         tm.tm_hour, tm.tm_min, tm.tm_sec, 0 /* nano */);
 341         if (error)
 342                 printk(KERN_WARNING "error: setting poweron time returned: %s\n",
 343                                 ppc_rtas_process_error(error));
 344         return count;
 345 }
 346 /* ****************************************************************** */
 347 static int ppc_rtas_poweron_show(struct seq_file *m, void *v)
 348 {
 349         if (power_on_time == 0)
 350                 seq_printf(m, "Power on time not set\n");
 351         else
 352                 seq_printf(m, "%lu\n",power_on_time);
 353         return 0;
 354 }
 355
 356 /* ****************************************************************** */
 357 /* PROGRESS                                                           */
 358 /* ****************************************************************** */
 359 static ssize_t ppc_rtas_progress_write(struct file *file,
 360                 const char __user *buf, size_t count, loff_t *ppos)
 361 {
 362         unsigned long hex;
 363
 364         if (count >= MAX_LINELENGTH)
 365                 count = MAX_LINELENGTH -1;
 366         if (copy_from_user(progress_led, buf, count)) { /* save the string */
 367                 return -EFAULT;
 368         }
 369         progress_led[count] = 0;
 370
 371         /* Lets see if the user passed hexdigits */
 372         hex = simple_strtoul(progress_led, NULL, 10);
 373
 374         rtas_progress ((char *)progress_led, hex);
 375         return count;
 376
 377         /* clear the line */
 378         /* rtas_progress("                   ", 0xffff);*/
 379 }
 380 /* ****************************************************************** */
 381 static int ppc_rtas_progress_show(struct seq_file *m, void *v)
 382 {
 383         if (progress_led)
 384                 seq_printf(m, "%s\n", progress_led);
 385         return 0;
 386 }
 387
 388 /* ****************************************************************** */
 389 /* CLOCK                                                              */
 390 /* ****************************************************************** */
 391 static ssize_t ppc_rtas_clock_write(struct file *file,
 392                 const char __user *buf, size_t count, loff_t *ppos)
 393 {
 394         struct rtc_time tm;
 395         unsigned long nowtime;
 396         int error = parse_number(buf, count, &nowtime);
 397         if (error)
 398                 return error;
 399
 400         to_tm(nowtime, &tm);
 401         error = rtas_call(rtas_token("set-time-of-day"), 7, 1, NULL,
 402                         tm.tm_year, tm.tm_mon, tm.tm_mday,
 403                         tm.tm_hour, tm.tm_min, tm.tm_sec, 0);
 404         if (error)
 405                 printk(KERN_WARNING "error: setting the clock returned: %s\n",
 406                                 ppc_rtas_process_error(error));
 407         return count;
 408 }
 409 /* ****************************************************************** */
 410 static int ppc_rtas_clock_show(struct seq_file *m, void *v)
 411 {
 412         int ret[8];
 413         int error = rtas_call(rtas_token("get-time-of-day"), 0, 8, ret);
 414
 415         if (error) {
 416                 printk(KERN_WARNING "error: reading the clock returned: %s\n",
 417                                 ppc_rtas_process_error(error));
 418                 seq_printf(m, "0");
 419         } else {
 420                 unsigned int year, mon, day, hour, min, sec;
 421                 year = ret[0]; mon  = ret[1]; day  = ret[2];
 422                 hour = ret[3]; min  = ret[4]; sec  = ret[5];
 423                 seq_printf(m, "%lu\n",
 424                                 mktime(year, mon, day, hour, min, sec));
 425         }
 426         return 0;
 427 }
 428
 429 /* ****************************************************************** */
 430 /* SENSOR STUFF                                                       */
 431 /* ****************************************************************** */
 432 static int ppc_rtas_sensors_show(struct seq_file *m, void *v)
 433 {
 434         int i,j;
 435         int state, error;
 436         int get_sensor_state = rtas_token("get-sensor-state");
 437
 438         seq_printf(m, "RTAS (RunTime Abstraction Services) Sensor Information\n");
 439         seq_printf(m, "Sensor\t\tValue\t\tCondition\tLocation\n");
 440         seq_printf(m, "********************************************************\n");
 441
 442         if (ppc_rtas_find_all_sensors() != 0) {
 443                 seq_printf(m, "\nNo sensors are available\n");
 444                 return 0;
 445         }
 446
 447         for (i=0; i<sensors.quant; i++) {
 448                 struct individual_sensor *p = &sensors.sensor[i];
 449                 char rstr[64];
 450                 char *loc;
 451                 int llen, offs;
 452
 453                 sprintf (rstr, SENSOR_PREFIX"%04d", p->token);
 454                 loc = (char *) get_property(rtas_node, rstr, &llen);
 455
 456                 /* A sensor may have multiple instances */
 457                 for (j = 0, offs = 0; j <= p->quant; j++) {
 458                         error = rtas_call(get_sensor_state, 2, 2, &state,
 459                                           p->token, j);
 460
 461                         ppc_rtas_process_sensor(m, p, state, error, loc);
 462                         seq_putc(m, '\n');
 463                         if (loc) {
 464                                 offs += strlen(loc) + 1;
 465                                 loc += strlen(loc) + 1;
 466                                 if (offs >= llen)
 467                                         loc = NULL;
 468                         }
 469                 }
 470         }
 471         return 0;
 472 }
 473
 474 /* ****************************************************************** */
 475
 476 static int ppc_rtas_find_all_sensors(void)
 477 {
 478         unsigned int *utmp;
 479         int len, i;
 480
 481         utmp = (unsigned int *) get_property(rtas_node, "rtas-sensors", &len);
 482         if (utmp == NULL) {
 483                 printk (KERN_ERR "error: could not get rtas-sensors\n");
 484                 return 1;
 485         }
 486
 487         sensors.quant = len / 8;      /* int + int */
 488
 489         for (i=0; i<sensors.quant; i++) {
 490                 sensors.sensor[i].token = *utmp++;
 491                 sensors.sensor[i].quant = *utmp++;
 492         }
 493         return 0;
 494 }
 495
 496 /* ****************************************************************** */
 497 /*
 498  * Builds a string of what rtas returned
 499  */
 500 static char *ppc_rtas_process_error(int error)
 501 {
 502         switch (error) {
 503                 case SENSOR_CRITICAL_HIGH:
 504                         return "(critical high)";
 505                 case SENSOR_WARNING_HIGH:
 506                         return "(warning high)";
 507                 case SENSOR_NORMAL:
 508                         return "(normal)";
 509                 case SENSOR_WARNING_LOW:
 510                         return "(warning low)";
 511                 case SENSOR_CRITICAL_LOW:
 512                         return "(critical low)";
 513                 case SENSOR_SUCCESS:
 514                         return "(read ok)";
 515                 case SENSOR_HW_ERROR:
 516                         return "(hardware error)";
 517                 case SENSOR_BUSY:
 518                         return "(busy)";
 519                 case SENSOR_NOT_EXIST:
 520                         return "(non existent)";
 521                 case SENSOR_DR_ENTITY:
 522                         return "(dr entity removed)";
 523                 default:
 524                         return "(UNKNOWN)";
 525         }
 526 }
 527
 528 /* ****************************************************************** */
 529 /*
 530  * Builds a string out of what the sensor said
 531  */
 532
 533 static void ppc_rtas_process_sensor(struct seq_file *m,
 534         struct individual_sensor *s, int state, int error, char *loc)
 535 {
 536         /* Defined return vales */
 537         const char * key_switch[]        = { "Off\t", "Normal\t", "Secure\t",
 538                                                 "Maintenance" };
 539         const char * enclosure_switch[]  = { "Closed", "Open" };
 540         const char * lid_status[]        = { " ", "Open", "Closed" };
 541         const char * power_source[]      = { "AC\t", "Battery",
 542                                                 "AC & Battery" };
 543         const char * battery_remaining[] = { "Very Low", "Low", "Mid", "High" };
 544         const char * epow_sensor[]       = {
 545                 "EPOW Reset", "Cooling warning", "Power warning",
 546                 "System shutdown", "System halt", "EPOW main enclosure",
 547                 "EPOW power off" };
 548         const char * battery_cyclestate[]  = { "None", "In progress",
 549                                                 "Requested" };
 550         const char * battery_charging[]    = { "Charging", "Discharching",
 551                                                 "No current flow" };
 552         const char * ibm_drconnector[]     = { "Empty", "Present", "Unusable",
 553                                                 "Exchange" };
 554
 555         int have_strings = 0;
 556         int num_states = 0;
 557         int temperature = 0;
 558         int unknown = 0;
 559
 560         /* What kind of sensor do we have here? */
 561
 562         switch (s->token) {
 563                 case KEY_SWITCH:
 564                         seq_printf(m, "Key switch:\t");
 565                         num_states = sizeof(key_switch) / sizeof(char *);
 566                         if (state < num_states) {
 567                                 seq_printf(m, "%s\t", key_switch[state]);
 568                                 have_strings = 1;
 569                         }
 570                         break;
 571                 case ENCLOSURE_SWITCH:
 572                         seq_printf(m, "Enclosure switch:\t");
 573                         num_states = sizeof(enclosure_switch) / sizeof(char *);
 574                         if (state < num_states) {
 575                                 seq_printf(m, "%s\t",
 576                                                 enclosure_switch[state]);
 577                                 have_strings = 1;
 578                         }
 579                         break;
 580                 case THERMAL_SENSOR:
 581                         seq_printf(m, "Temp. (C/F):\t");
 582                         temperature = 1;
 583                         break;
 584                 case LID_STATUS:
 585                         seq_printf(m, "Lid status:\t");
 586                         num_states = sizeof(lid_status) / sizeof(char *);
 587                         if (state < num_states) {
 588                                 seq_printf(m, "%s\t", lid_status[state]);
 589                                 have_strings = 1;
 590                         }
 591                         break;
 592                 case POWER_SOURCE:
 593                         seq_printf(m, "Power source:\t");
 594                         num_states = sizeof(power_source) / sizeof(char *);
 595                         if (state < num_states) {
 596                                 seq_printf(m, "%s\t",
 597                                                 power_source[state]);
 598                                 have_strings = 1;
 599                         }
 600                         break;
 601                 case BATTERY_VOLTAGE:
 602                         seq_printf(m, "Battery voltage:\t");
 603                         break;
 604                 case BATTERY_REMAINING:
 605                         seq_printf(m, "Battery remaining:\t");
 606                         num_states = sizeof(battery_remaining) / sizeof(char *);
 607                         if (state < num_states)
 608                         {
 609                                 seq_printf(m, "%s\t",
 610                                                 battery_remaining[state]);
 611                                 have_strings = 1;
 612                         }
 613                         break;
 614                 case BATTERY_PERCENTAGE:
 615                         seq_printf(m, "Battery percentage:\t");
 616                         break;
 617                 case EPOW_SENSOR:
 618                         seq_printf(m, "EPOW Sensor:\t");
 619                         num_states = sizeof(epow_sensor) / sizeof(char *);
 620                         if (state < num_states) {
 621                                 seq_printf(m, "%s\t", epow_sensor[state]);
 622                                 have_strings = 1;
 623                         }
 624                         break;
 625                 case BATTERY_CYCLESTATE:
 626                         seq_printf(m, "Battery cyclestate:\t");
 627                         num_states = sizeof(battery_cyclestate) /
 628                                         sizeof(char *);
 629                         if (state < num_states) {
 630                                 seq_printf(m, "%s\t",
 631                                                 battery_cyclestate[state]);
 632                                 have_strings = 1;
 633                         }
 634                         break;
 635                 case BATTERY_CHARGING:
 636                         seq_printf(m, "Battery Charging:\t");
 637                         num_states = sizeof(battery_charging) / sizeof(char *);
 638                         if (state < num_states) {
 639                                 seq_printf(m, "%s\t",
 640                                                 battery_charging[state]);
 641                                 have_strings = 1;
 642                         }
 643                         break;
 644                 case IBM_SURVEILLANCE:
 645                         seq_printf(m, "Surveillance:\t");
 646                         break;
 647                 case IBM_FANRPM:
 648                         seq_printf(m, "Fan (rpm):\t");
 649                         break;
 650                 case IBM_VOLTAGE:
 651                         seq_printf(m, "Voltage (mv):\t");
 652                         break;
 653                 case IBM_DRCONNECTOR:
 654                         seq_printf(m, "DR connector:\t");
 655                         num_states = sizeof(ibm_drconnector) / sizeof(char *);
 656                         if (state < num_states) {
 657                                 seq_printf(m, "%s\t",
 658                                                 ibm_drconnector[state]);
 659                                 have_strings = 1;
 660                         }
 661                         break;
 662                 case IBM_POWERSUPPLY:
 663                         seq_printf(m, "Powersupply:\t");
 664                         break;
 665                 default:
 666                         seq_printf(m,  "Unknown sensor (type %d), ignoring it\n",
 667                                         s->token);
 668                         unknown = 1;
 669                         have_strings = 1;
 670                         break;
 671         }
 672         if (have_strings == 0) {
 673                 if (temperature) {
 674                         seq_printf(m, "%4d /%4d\t", state, cel_to_fahr(state));
 675                 } else
 676                         seq_printf(m, "%10d\t", state);
 677         }
 678         if (unknown == 0) {
 679                 seq_printf(m, "%s\t", ppc_rtas_process_error(error));
 680                 get_location_code(m, s, loc);
 681         }
 682 }
 683
 684 /* ****************************************************************** */
 685
 686 static void check_location(struct seq_file *m, char *c)
 687 {
 688         switch (c[0]) {
 689                 case LOC_PLANAR:
 690                         seq_printf(m, "Planar #%c", c[1]);
 691                         break;
 692                 case LOC_CPU:
 693                         seq_printf(m, "CPU #%c", c[1]);
 694                         break;
 695                 case LOC_FAN:
 696                         seq_printf(m, "Fan #%c", c[1]);
 697                         break;
 698                 case LOC_RACKMOUNTED:
 699                         seq_printf(m, "Rack #%c", c[1]);
 700                         break;
 701                 case LOC_VOLTAGE:
 702                         seq_printf(m, "Voltage #%c", c[1]);
 703                         break;
 704                 case LOC_LCD:
 705                         seq_printf(m, "LCD #%c", c[1]);
 706                         break;
 707                 case '.':
 708                         seq_printf(m, "- %c", c[1]);
 709                         break;
 710                 default:
 711                         seq_printf(m, "Unknown location");
 712                         break;
 713         }
 714 }
 715
 716
 717 /* ****************************************************************** */
 718 /*
 719  * Format:
 720  * ${LETTER}${NUMBER}[[-/]${LETTER}${NUMBER} [ ... ] ]
 721  * the '.' may be an abbrevation
 722  */
 723 static void check_location_string(struct seq_file *m, char *c)
 724 {
 725         while (*c) {
 726                 if (isalpha(*c) || *c == '.')
 727                         check_location(m, c);
 728                 else if (*c == '/' || *c == '-')
 729                         seq_printf(m, " at ");
 730                 c++;
 731         }
 732 }
 733
 734
 735 /* ****************************************************************** */
 736
 737 static void get_location_code(struct seq_file *m, struct individual_sensor *s, 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 }