arch/ppc64/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 #include <asm/systemcfg.h>
  36
  37 /* Token for Sensors */
  38 #define KEY_SWITCH              0x0001
  39 #define ENCLOSURE_SWITCH        0x0002
  40 #define THERMAL_SENSOR          0x0003
  41 #define LID_STATUS              0x0004
  42 #define POWER_SOURCE            0x0005
  43 #define BATTERY_VOLTAGE         0x0006
  44 #define BATTERY_REMAINING       0x0007
  45 #define BATTERY_PERCENTAGE      0x0008
  46 #define EPOW_SENSOR             0x0009
  47 #define BATTERY_CYCLESTATE      0x000a
  48 #define BATTERY_CHARGING        0x000b
  49
  50 /* IBM specific sensors */
  51 #define IBM_SURVEILLANCE        0x2328 /* 9000 */
  52 #define IBM_FANRPM              0x2329 /* 9001 */
  53 #define IBM_VOLTAGE             0x232a /* 9002 */
  54 #define IBM_DRCONNECTOR         0x232b /* 9003 */
  55 #define IBM_POWERSUPPLY         0x232c /* 9004 */
  56
  57 /* Status return values */
  58 #define SENSOR_CRITICAL_HIGH    13
  59 #define SENSOR_WARNING_HIGH     12
  60 #define SENSOR_NORMAL           11
  61 #define SENSOR_WARNING_LOW      10
  62 #define SENSOR_CRITICAL_LOW      9
  63 #define SENSOR_SUCCESS           0
  64 #define SENSOR_HW_ERROR         -1
  65 #define SENSOR_BUSY             -2
  66 #define SENSOR_NOT_EXIST        -3
  67 #define SENSOR_DR_ENTITY        -9000
  68
  69 /* Location Codes */
  70 #define LOC_SCSI_DEV_ADDR       'A'
  71 #define LOC_SCSI_DEV_LOC        'B'
  72 #define LOC_CPU                 'C'
  73 #define LOC_DISKETTE            'D'
  74 #define LOC_ETHERNET            'E'
  75 #define LOC_FAN                 'F'
  76 #define LOC_GRAPHICS            'G'
  77 /* reserved / not used          'H' */
  78 #define LOC_IO_ADAPTER          'I'
  79 /* reserved / not used          'J' */
  80 #define LOC_KEYBOARD            'K'
  81 #define LOC_LCD                 'L'
  82 #define LOC_MEMORY              'M'
  83 #define LOC_NV_MEMORY           'N'
  84 #define LOC_MOUSE               'O'
  85 #define LOC_PLANAR              'P'
  86 #define LOC_OTHER_IO            'Q'
  87 #define LOC_PARALLEL            'R'
  88 #define LOC_SERIAL              'S'
  89 #define LOC_DEAD_RING           'T'
  90 #define LOC_RACKMOUNTED         'U' /* for _u_nit is rack mounted */
  91 #define LOC_VOLTAGE             'V'
  92 #define LOC_SWITCH_ADAPTER      'W'
  93 #define LOC_OTHER               'X'
  94 #define LOC_FIRMWARE            'Y'
  95 #define LOC_SCSI                'Z'
  96
  97 /* Tokens for indicators */
  98 #define TONE_FREQUENCY          0x0001 /* 0 - 1000 (HZ)*/
  99 #define TONE_VOLUME             0x0002 /* 0 - 100 (%) */
 100 #define SYSTEM_POWER_STATE      0x0003
 101 #define WARNING_LIGHT           0x0004
 102 #define DISK_ACTIVITY_LIGHT     0x0005
 103 #define HEX_DISPLAY_UNIT        0x0006
 104 #define BATTERY_WARNING_TIME    0x0007
 105 #define CONDITION_CYCLE_REQUEST 0x0008
 106 #define SURVEILLANCE_INDICATOR  0x2328 /* 9000 */
 107 #define DR_ACTION               0x2329 /* 9001 */
 108 #define DR_INDICATOR            0x232a /* 9002 */
 109 /* 9003 - 9004: Vendor specific */
 110 /* 9006 - 9999: Vendor specific */
 111
 112 /* other */
 113 #define MAX_SENSORS              17  /* I only know of 17 sensors */
 114 #define MAX_LINELENGTH          256
 115 #define SENSOR_PREFIX           "ibm,sensor-"
 116 #define cel_to_fahr(x)          ((x*9/5)+32)
 117
 118
 119 /* Globals */
 120 static struct rtas_sensors sensors;
 121 static struct device_node *rtas_node = NULL;
 122 static unsigned long power_on_time = 0; /* Save the time the user set */
 123 static char progress_led[MAX_LINELENGTH];
 124
 125 static unsigned long rtas_tone_frequency = 1000;
 126 static unsigned long rtas_tone_volume = 0;
 127
 128 /* ****************STRUCTS******************************************* */
 129 struct individual_sensor {
 130         unsigned int token;
 131         unsigned int quant;
 132 };
 133
 134 struct rtas_sensors {
 135         struct individual_sensor sensor[MAX_SENSORS];
 136         unsigned int quant;
 137 };
 138
 139 /* ****************************************************************** */
 140 /* Declarations */
 141 static int ppc_rtas_sensors_show(struct seq_file *m, void *v);
 142 static int ppc_rtas_clock_show(struct seq_file *m, void *v);
 143 static ssize_t ppc_rtas_clock_write(struct file *file,
 144                 const char __user *buf, size_t count, loff_t *ppos);
 145 static int ppc_rtas_progress_show(struct seq_file *m, void *v);
 146 static ssize_t ppc_rtas_progress_write(struct file *file,
 147                 const char __user *buf, size_t count, loff_t *ppos);
 148 static int ppc_rtas_poweron_show(struct seq_file *m, void *v);
 149 static ssize_t ppc_rtas_poweron_write(struct file *file,
 150                 const char __user *buf, size_t count, loff_t *ppos);
 151
 152 static ssize_t ppc_rtas_tone_freq_write(struct file *file,
 153                 const char __user *buf, size_t count, loff_t *ppos);
 154 static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v);
 155 static ssize_t ppc_rtas_tone_volume_write(struct file *file,
 156                 const char __user *buf, size_t count, loff_t *ppos);
 157 static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v);
 158 static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v);
 159
 160 static int sensors_open(struct inode *inode, struct file *file)
 161 {
 162         return single_open(file, ppc_rtas_sensors_show, NULL);
 163 }
 164
 165 struct file_operations ppc_rtas_sensors_operations = {
 166         .open           = sensors_open,
 167         .read           = seq_read,
 168         .llseek         = seq_lseek,
 169         .release        = single_release,
 170 };
 171
 172 static int poweron_open(struct inode *inode, struct file *file)
 173 {
 174         return single_open(file, ppc_rtas_poweron_show, NULL);
 175 }
 176
 177 struct file_operations ppc_rtas_poweron_operations = {
 178         .open           = poweron_open,
 179         .read           = seq_read,
 180         .llseek         = seq_lseek,
 181         .write          = ppc_rtas_poweron_write,
 182         .release        = single_release,
 183 };
 184
 185 static int progress_open(struct inode *inode, struct file *file)
 186 {
 187         return single_open(file, ppc_rtas_progress_show, NULL);
 188 }
 189
 190 struct file_operations ppc_rtas_progress_operations = {
 191         .open           = progress_open,
 192         .read           = seq_read,
 193         .llseek         = seq_lseek,
 194         .write          = ppc_rtas_progress_write,
 195         .release        = single_release,
 196 };
 197
 198 static int clock_open(struct inode *inode, struct file *file)
 199 {
 200         return single_open(file, ppc_rtas_clock_show, NULL);
 201 }
 202
 203 struct file_operations ppc_rtas_clock_operations = {
 204         .open           = clock_open,
 205         .read           = seq_read,
 206         .llseek         = seq_lseek,
 207         .write          = ppc_rtas_clock_write,
 208         .release        = single_release,
 209 };
 210
 211 static int tone_freq_open(struct inode *inode, struct file *file)
 212 {
 213         return single_open(file, ppc_rtas_tone_freq_show, NULL);
 214 }
 215
 216 struct file_operations ppc_rtas_tone_freq_operations = {
 217         .open           = tone_freq_open,
 218         .read           = seq_read,
 219         .llseek         = seq_lseek,
 220         .write          = ppc_rtas_tone_freq_write,
 221         .release        = single_release,
 222 };
 223
 224 static int tone_volume_open(struct inode *inode, struct file *file)
 225 {
 226         return single_open(file, ppc_rtas_tone_volume_show, NULL);
 227 }
 228
 229 struct file_operations ppc_rtas_tone_volume_operations = {
 230         .open           = tone_volume_open,
 231         .read           = seq_read,
 232         .llseek         = seq_lseek,
 233         .write          = ppc_rtas_tone_volume_write,
 234         .release        = single_release,
 235 };
 236
 237 static int rmo_buf_open(struct inode *inode, struct file *file)
 238 {
 239         return single_open(file, ppc_rtas_rmo_buf_show, NULL);
 240 }
 241
 242 struct file_operations ppc_rtas_rmo_buf_ops = {
 243         .open           = rmo_buf_open,
 244         .read           = seq_read,
 245         .llseek         = seq_lseek,
 246         .release        = single_release,
 247 };
 248
 249 static int ppc_rtas_find_all_sensors(void);
 250 static void ppc_rtas_process_sensor(struct seq_file *m,
 251         struct individual_sensor *s, int state, int error, char *loc);
 252 static char *ppc_rtas_process_error(int error);
 253 static void get_location_code(struct seq_file *m,
 254         struct individual_sensor *s, char *loc);
 255 static void check_location_string(struct seq_file *m, char *c);
 256 static void check_location(struct seq_file *m, char *c);
 257
 258 static int __init proc_rtas_init(void)
 259 {
 260         struct proc_dir_entry *entry;
 261
 262         if (!(systemcfg->platform & PLATFORM_PSERIES))
 263                 return 1;
 264
 265         rtas_node = of_find_node_by_name(NULL, "rtas");
 266         if (rtas_node == NULL)
 267                 return 1;
 268
 269         entry = create_proc_entry("ppc64/rtas/progress", S_IRUGO|S_IWUSR, NULL);
 270         if (entry)
 271                 entry->proc_fops = &ppc_rtas_progress_operations;
 272
 273         entry = create_proc_entry("ppc64/rtas/clock", S_IRUGO|S_IWUSR, NULL);
 274         if (entry)
 275                 entry->proc_fops = &ppc_rtas_clock_operations;
 276
 277         entry = create_proc_entry("ppc64/rtas/poweron", S_IWUSR|S_IRUGO, NULL);
 278         if (entry)
 279                 entry->proc_fops = &ppc_rtas_poweron_operations;
 280
 281         entry = create_proc_entry("ppc64/rtas/sensors", S_IRUGO, NULL);
 282         if (entry)
 283                 entry->proc_fops = &ppc_rtas_sensors_operations;
 284
 285         entry = create_proc_entry("ppc64/rtas/frequency", S_IWUSR|S_IRUGO,
 286                                   NULL);
 287         if (entry)
 288                 entry->proc_fops = &ppc_rtas_tone_freq_operations;
 289
 290         entry = create_proc_entry("ppc64/rtas/volume", S_IWUSR|S_IRUGO, NULL);
 291         if (entry)
 292                 entry->proc_fops = &ppc_rtas_tone_volume_operations;
 293
 294         entry = create_proc_entry("ppc64/rtas/rmo_buffer", S_IRUSR, NULL);
 295         if (entry)
 296                 entry->proc_fops = &ppc_rtas_rmo_buf_ops;
 297
 298         return 0;
 299 }
 300
 301 __initcall(proc_rtas_init);
 302
 303 static int parse_number(const char __user *p, size_t count, unsigned long *val)
 304 {
 305         char buf[40];
 306         char *end;
 307
 308         if (count > 39)
 309                 return -EINVAL;
 310
 311         if (copy_from_user(buf, p, count))
 312                 return -EFAULT;
 313
 314         buf[count] = 0;
 315
 316         *val = simple_strtoul(buf, &end, 10);
 317         if (*end && *end != '\n')
 318                 return -EINVAL;
 319
 320         return 0;
 321 }
 322
 323 /* ****************************************************************** */
 324 /* POWER-ON-TIME                                                      */
 325 /* ****************************************************************** */
 326 static ssize_t ppc_rtas_poweron_write(struct file *file,
 327                 const char __user *buf, size_t count, loff_t *ppos)
 328 {
 329         struct rtc_time tm;
 330         unsigned long nowtime;
 331         int error = parse_number(buf, count, &nowtime);
 332         if (error)
 333                 return error;
 334
 335         power_on_time = nowtime; /* save the time */
 336
 337         to_tm(nowtime, &tm);
 338
 339         error = rtas_call(rtas_token("set-time-for-power-on"), 7, 1, NULL,
 340                         tm.tm_year, tm.tm_mon, tm.tm_mday,
 341                         tm.tm_hour, tm.tm_min, tm.tm_sec, 0 /* nano */);
 342         if (error)
 343                 printk(KERN_WARNING "error: setting poweron time returned: %s\n",
 344                                 ppc_rtas_process_error(error));
 345         return count;
 346 }
 347 /* ****************************************************************** */
 348 static int ppc_rtas_poweron_show(struct seq_file *m, void *v)
 349 {
 350         if (power_on_time == 0)
 351                 seq_printf(m, "Power on time not set\n");
 352         else
 353                 seq_printf(m, "%lu\n",power_on_time);
 354         return 0;
 355 }
 356
 357 /* ****************************************************************** */
 358 /* PROGRESS                                                           */
 359 /* ****************************************************************** */
 360 static ssize_t ppc_rtas_progress_write(struct file *file,
 361                 const char __user *buf, size_t count, loff_t *ppos)
 362 {
 363         unsigned long hex;
 364
 365         if (count >= MAX_LINELENGTH)
 366                 count = MAX_LINELENGTH -1;
 367         if (copy_from_user(progress_led, buf, count)) { /* save the string */
 368                 return -EFAULT;
 369         }
 370         progress_led[count] = 0;
 371
 372         /* Lets see if the user passed hexdigits */
 373         hex = simple_strtoul(progress_led, NULL, 10);
 374
 375         rtas_progress ((char *)progress_led, hex);
 376         return count;
 377
 378         /* clear the line */
 379         /* rtas_progress("                   ", 0xffff);*/
 380 }
 381 /* ****************************************************************** */
 382 static int ppc_rtas_progress_show(struct seq_file *m, void *v)
 383 {
 384         if (progress_led)
 385                 seq_printf(m, "%s\n", progress_led);
 386         return 0;
 387 }
 388
 389 /* ****************************************************************** */
 390 /* CLOCK                                                              */
 391 /* ****************************************************************** */
 392 static ssize_t ppc_rtas_clock_write(struct file *file,
 393                 const char __user *buf, size_t count, loff_t *ppos)
 394 {
 395         struct rtc_time tm;
 396         unsigned long nowtime;
 397         int error = parse_number(buf, count, &nowtime);
 398         if (error)
 399                 return error;
 400
 401         to_tm(nowtime, &tm);
 402         error = rtas_call(rtas_token("set-time-of-day"), 7, 1, NULL,
 403                         tm.tm_year, tm.tm_mon, tm.tm_mday,
 404                         tm.tm_hour, tm.tm_min, tm.tm_sec, 0);
 405         if (error)
 406                 printk(KERN_WARNING "error: setting the clock returned: %s\n",
 407                                 ppc_rtas_process_error(error));
 408         return count;
 409 }
 410 /* ****************************************************************** */
 411 static int ppc_rtas_clock_show(struct seq_file *m, void *v)
 412 {
 413         int ret[8];
 414         int error = rtas_call(rtas_token("get-time-of-day"), 0, 8, ret);
 415
 416         if (error) {
 417                 printk(KERN_WARNING "error: reading the clock returned: %s\n",
 418                                 ppc_rtas_process_error(error));
 419                 seq_printf(m, "0");
 420         } else {
 421                 unsigned int year, mon, day, hour, min, sec;
 422                 year = ret[0]; mon  = ret[1]; day  = ret[2];
 423                 hour = ret[3]; min  = ret[4]; sec  = ret[5];
 424                 seq_printf(m, "%lu\n",
 425                                 mktime(year, mon, day, hour, min, sec));
 426         }
 427         return 0;
 428 }
 429
 430 /* ****************************************************************** */
 431 /* SENSOR STUFF                                                       */
 432 /* ****************************************************************** */
 433 static int ppc_rtas_sensors_show(struct seq_file *m, void *v)
 434 {
 435         int i,j;
 436         int state, error;
 437         int get_sensor_state = rtas_token("get-sensor-state");
 438
 439         seq_printf(m, "RTAS (RunTime Abstraction Services) Sensor Information\n");
 440         seq_printf(m, "Sensor\t\tValue\t\tCondition\tLocation\n");
 441         seq_printf(m, "********************************************************\n");
 442
 443         if (ppc_rtas_find_all_sensors() != 0) {
 444                 seq_printf(m, "\nNo sensors are available\n");
 445                 return 0;
 446         }
 447
 448         for (i=0; i<sensors.quant; i++) {
 449                 struct individual_sensor *p = &sensors.sensor[i];
 450                 char rstr[64];
 451                 char *loc;
 452                 int llen, offs;
 453
 454                 sprintf (rstr, SENSOR_PREFIX"%04d", p->token);
 455                 loc = (char *) get_property(rtas_node, rstr, &llen);
 456
 457                 /* A sensor may have multiple instances */
 458                 for (j = 0, offs = 0; j <= p->quant; j++) {
 459                         error = rtas_call(get_sensor_state, 2, 2, &state,
 460                                           p->token, j);
 461
 462                         ppc_rtas_process_sensor(m, p, state, error, loc);
 463                         seq_putc(m, '\n');
 464                         if (loc) {
 465                                 offs += strlen(loc) + 1;
 466                                 loc += strlen(loc) + 1;
 467                                 if (offs >= llen)
 468                                         loc = NULL;
 469                         }
 470                 }
 471         }
 472         return 0;
 473 }
 474
 475 /* ****************************************************************** */
 476
 477 static int ppc_rtas_find_all_sensors(void)
 478 {
 479         unsigned int *utmp;
 480         int len, i;
 481
 482         utmp = (unsigned int *) get_property(rtas_node, "rtas-sensors", &len);
 483         if (utmp == NULL) {
 484                 printk (KERN_ERR "error: could not get rtas-sensors\n");
 485                 return 1;
 486         }
 487
 488         sensors.quant = len / 8;      /* int + int */
 489
 490         for (i=0; i<sensors.quant; i++) {
 491                 sensors.sensor[i].token = *utmp++;
 492                 sensors.sensor[i].quant = *utmp++;
 493         }
 494         return 0;
 495 }
 496
 497 /* ****************************************************************** */
 498 /*
 499  * Builds a string of what rtas returned
 500  */
 501 static char *ppc_rtas_process_error(int error)
 502 {
 503         switch (error) {
 504                 case SENSOR_CRITICAL_HIGH:
 505                         return "(critical high)";
 506                 case SENSOR_WARNING_HIGH:
 507                         return "(warning high)";
 508                 case SENSOR_NORMAL:
 509                         return "(normal)";
 510                 case SENSOR_WARNING_LOW:
 511                         return "(warning low)";
 512                 case SENSOR_CRITICAL_LOW:
 513                         return "(critical low)";
 514                 case SENSOR_SUCCESS:
 515                         return "(read ok)";
 516                 case SENSOR_HW_ERROR:
 517                         return "(hardware error)";
 518                 case SENSOR_BUSY:
 519                         return "(busy)";
 520                 case SENSOR_NOT_EXIST:
 521                         return "(non existent)";
 522                 case SENSOR_DR_ENTITY:
 523                         return "(dr entity removed)";
 524                 default:
 525                         return "(UNKNOWN)";
 526         }
 527 }
 528
 529 /* ****************************************************************** */
 530 /*
 531  * Builds a string out of what the sensor said
 532  */
 533
 534 static void ppc_rtas_process_sensor(struct seq_file *m,
 535         struct individual_sensor *s, int state, int error, char *loc)
 536 {
 537         /* Defined return vales */
 538         const char * key_switch[]        = { "Off\t", "Normal\t", "Secure\t",
 539                                                 "Maintenance" };
 540         const char * enclosure_switch[]  = { "Closed", "Open" };
 541         const char * lid_status[]        = { " ", "Open", "Closed" };
 542         const char * power_source[]      = { "AC\t", "Battery",
 543                                                 "AC & Battery" };
 544         const char * battery_remaining[] = { "Very Low", "Low", "Mid", "High" };
 545         const char * epow_sensor[]       = {
 546                 "EPOW Reset", "Cooling warning", "Power warning",
 547                 "System shutdown", "System halt", "EPOW main enclosure",
 548                 "EPOW power off" };
 549         const char * battery_cyclestate[]  = { "None", "In progress",
 550                                                 "Requested" };
 551         const char * battery_charging[]    = { "Charging", "Discharching",
 552                                                 "No current flow" };
 553         const char * ibm_drconnector[]     = { "Empty", "Present", "Unusable",
 554                                                 "Exchange" };
 555
 556         int have_strings = 0;
 557         int num_states = 0;
 558         int temperature = 0;
 559         int unknown = 0;
 560
 561         /* What kind of sensor do we have here? */
 562
 563         switch (s->token) {
 564                 case KEY_SWITCH:
 565                         seq_printf(m, "Key switch:\t");
 566                         num_states = sizeof(key_switch) / sizeof(char *);
 567                         if (state < num_states) {
 568                                 seq_printf(m, "%s\t", key_switch[state]);
 569                                 have_strings = 1;
 570                         }
 571                         break;
 572                 case ENCLOSURE_SWITCH:
 573                         seq_printf(m, "Enclosure switch:\t");
 574                         num_states = sizeof(enclosure_switch) / sizeof(char *);
 575                         if (state < num_states) {
 576                                 seq_printf(m, "%s\t",
 577                                                 enclosure_switch[state]);
 578                                 have_strings = 1;
 579                         }
 580                         break;
 581                 case THERMAL_SENSOR:
 582                         seq_printf(m, "Temp. (C/F):\t");
 583                         temperature = 1;
 584                         break;
 585                 case LID_STATUS:
 586                         seq_printf(m, "Lid status:\t");
 587                         num_states = sizeof(lid_status) / sizeof(char *);
 588                         if (state < num_states) {
 589                                 seq_printf(m, "%s\t", lid_status[state]);
 590                                 have_strings = 1;
 591                         }
 592                         break;
 593                 case POWER_SOURCE:
 594                         seq_printf(m, "Power source:\t");
 595                         num_states = sizeof(power_source) / sizeof(char *);
 596                         if (state < num_states) {
 597                                 seq_printf(m, "%s\t",
 598                                                 power_source[state]);
 599                                 have_strings = 1;
 600                         }
 601                         break;
 602                 case BATTERY_VOLTAGE:
 603                         seq_printf(m, "Battery voltage:\t");
 604                         break;
 605                 case BATTERY_REMAINING:
 606                         seq_printf(m, "Battery remaining:\t");
 607                         num_states = sizeof(battery_remaining) / sizeof(char *);
 608                         if (state < num_states)
 609                         {
 610                                 seq_printf(m, "%s\t",
 611                                                 battery_remaining[state]);
 612                                 have_strings = 1;
 613                         }
 614                         break;
 615                 case BATTERY_PERCENTAGE:
 616                         seq_printf(m, "Battery percentage:\t");
 617                         break;
 618                 case EPOW_SENSOR:
 619                         seq_printf(m, "EPOW Sensor:\t");
 620                         num_states = sizeof(epow_sensor) / sizeof(char *);
 621                         if (state < num_states) {
 622                                 seq_printf(m, "%s\t", epow_sensor[state]);
 623                                 have_strings = 1;
 624                         }
 625                         break;
 626                 case BATTERY_CYCLESTATE:
 627                         seq_printf(m, "Battery cyclestate:\t");
 628                         num_states = sizeof(battery_cyclestate) /
 629                                         sizeof(char *);
 630                         if (state < num_states) {
 631                                 seq_printf(m, "%s\t",
 632                                                 battery_cyclestate[state]);
 633                                 have_strings = 1;
 634                         }
 635                         break;
 636                 case BATTERY_CHARGING:
 637                         seq_printf(m, "Battery Charging:\t");
 638                         num_states = sizeof(battery_charging) / sizeof(char *);
 639                         if (state < num_states) {
 640                                 seq_printf(m, "%s\t",
 641                                                 battery_charging[state]);
 642                                 have_strings = 1;
 643                         }
 644                         break;
 645                 case IBM_SURVEILLANCE:
 646                         seq_printf(m, "Surveillance:\t");
 647                         break;
 648                 case IBM_FANRPM:
 649                         seq_printf(m, "Fan (rpm):\t");
 650                         break;
 651                 case IBM_VOLTAGE:
 652                         seq_printf(m, "Voltage (mv):\t");
 653                         break;
 654                 case IBM_DRCONNECTOR:
 655                         seq_printf(m, "DR connector:\t");
 656                         num_states = sizeof(ibm_drconnector) / sizeof(char *);
 657                         if (state < num_states) {
 658                                 seq_printf(m, "%s\t",
 659                                                 ibm_drconnector[state]);
 660                                 have_strings = 1;
 661                         }
 662                         break;
 663                 case IBM_POWERSUPPLY:
 664                         seq_printf(m, "Powersupply:\t");
 665                         break;
 666                 default:
 667                         seq_printf(m,  "Unknown sensor (type %d), ignoring it\n",
 668                                         s->token);
 669                         unknown = 1;
 670                         have_strings = 1;
 671                         break;
 672         }
 673         if (have_strings == 0) {
 674                 if (temperature) {
 675                         seq_printf(m, "%4d /%4d\t", state, cel_to_fahr(state));
 676                 } else
 677                         seq_printf(m, "%10d\t", state);
 678         }
 679         if (unknown == 0) {
 680                 seq_printf(m, "%s\t", ppc_rtas_process_error(error));
 681                 get_location_code(m, s, loc);
 682         }
 683 }
 684
 685 /* ****************************************************************** */
 686
 687 static void check_location(struct seq_file *m, char *c)
 688 {
 689         switch (c[0]) {
 690                 case LOC_PLANAR:
 691                         seq_printf(m, "Planar #%c", c[1]);
 692                         break;
 693                 case LOC_CPU:
 694                         seq_printf(m, "CPU #%c", c[1]);
 695                         break;
 696                 case LOC_FAN:
 697                         seq_printf(m, "Fan #%c", c[1]);
 698                         break;
 699                 case LOC_RACKMOUNTED:
 700                         seq_printf(m, "Rack #%c", c[1]);
 701                         break;
 702                 case LOC_VOLTAGE:
 703                         seq_printf(m, "Voltage #%c", c[1]);
 704                         break;
 705                 case LOC_LCD:
 706                         seq_printf(m, "LCD #%c", c[1]);
 707                         break;
 708                 case '.':
 709                         seq_printf(m, "- %c", c[1]);
 710                         break;
 711                 default:
 712                         seq_printf(m, "Unknown location");
 713                         break;
 714         }
 715 }
 716
 717
 718 /* ****************************************************************** */
 719 /*
 720  * Format:
 721  * ${LETTER}${NUMBER}[[-/]${LETTER}${NUMBER} [ ... ] ]
 722  * the '.' may be an abbrevation
 723  */
 724 static void check_location_string(struct seq_file *m, char *c)
 725 {
 726         while (*c) {
 727                 if (isalpha(*c) || *c == '.')
 728                         check_location(m, c);
 729                 else if (*c == '/' || *c == '-')
 730                         seq_printf(m, " at ");
 731                 c++;
 732         }
 733 }
 734
 735
 736 /* ****************************************************************** */
 737
 738 static void get_location_code(struct seq_file *m, struct individual_sensor *s, char *loc)
 739 {
 740         if (!loc || !*loc) {
 741                 seq_printf(m, "---");/* does not have a location */
 742         } else {
 743                 check_location_string(m, loc);
 744         }
 745         seq_putc(m, ' ');
 746 }
 747 /* ****************************************************************** */
 748 /* INDICATORS - Tone Frequency                                        */
 749 /* ****************************************************************** */
 750 static ssize_t ppc_rtas_tone_freq_write(struct file *file,
 751                 const char __user *buf, size_t count, loff_t *ppos)
 752 {
 753         unsigned long freq;
 754         int error = parse_number(buf, count, &freq);
 755         if (error)
 756                 return error;
 757
 758         rtas_tone_frequency = freq; /* save it for later */
 759         error = rtas_call(rtas_token("set-indicator"), 3, 1, NULL,
 760                         TONE_FREQUENCY, 0, freq);
 761         if (error)
 762                 printk(KERN_WARNING "error: setting tone frequency returned: %s\n",
 763                                 ppc_rtas_process_error(error));
 764         return count;
 765 }
 766 /* ****************************************************************** */
 767 static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v)
 768 {
 769         seq_printf(m, "%lu\n", rtas_tone_frequency);
 770         return 0;
 771 }
 772 /* ****************************************************************** */
 773 /* INDICATORS - Tone Volume                                           */
 774 /* ****************************************************************** */
 775 static ssize_t ppc_rtas_tone_volume_write(struct file *file,
 776                 const char __user *buf, size_t count, loff_t *ppos)
 777 {
 778         unsigned long volume;
 779         int error = parse_number(buf, count, &volume);
 780         if (error)
 781                 return error;
 782
 783         if (volume > 100)
 784                 volume = 100;
 785
 786         rtas_tone_volume = volume; /* save it for later */
 787         error = rtas_call(rtas_token("set-indicator"), 3, 1, NULL,
 788                         TONE_VOLUME, 0, volume);
 789         if (error)
 790                 printk(KERN_WARNING "error: setting tone volume returned: %s\n",
 791                                 ppc_rtas_process_error(error));
 792         return count;
 793 }
 794 /* ****************************************************************** */
 795 static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v)
 796 {
 797         seq_printf(m, "%lu\n", rtas_tone_volume);
 798         return 0;
 799 }
 800
 801 #define RMO_READ_BUF_MAX 30
 802
 803 /* RTAS Userspace access */
 804 static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v)
 805 {
 806         seq_printf(m, "%016lx %x\n", rtas_rmo_buf, RTAS_RMOBUF_MAX);
 807         return 0;
 808 }