1 // SPDX-License-Identifier: GPL-2.0 2 /* 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 #include <linux/of.h> 28 29 #include <linux/uaccess.h> 30 #include <asm/processor.h> 31 #include <asm/io.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 struct individual_sensor { 118 unsigned int token; 119 unsigned int quant; 120 }; 121 122 struct rtas_sensors { 123 struct individual_sensor sensor[MAX_SENSORS]; 124 unsigned int quant; 125 }; 126 127 /* Globals */ 128 static struct rtas_sensors sensors; 129 static struct device_node *rtas_node = NULL; 130 static unsigned long power_on_time = 0; /* Save the time the user set */ 131 static char progress_led[MAX_LINELENGTH]; 132 133 static unsigned long rtas_tone_frequency = 1000; 134 static unsigned long rtas_tone_volume = 0; 135 136 /* ****************************************************************** */ 137 /* Declarations */ 138 static int ppc_rtas_sensors_show(struct seq_file *m, void *v); 139 static int ppc_rtas_clock_show(struct seq_file *m, void *v); 140 static ssize_t ppc_rtas_clock_write(struct file *file, 141 const char __user *buf, size_t count, loff_t *ppos); 142 static int ppc_rtas_progress_show(struct seq_file *m, void *v); 143 static ssize_t ppc_rtas_progress_write(struct file *file, 144 const char __user *buf, size_t count, loff_t *ppos); 145 static int ppc_rtas_poweron_show(struct seq_file *m, void *v); 146 static ssize_t ppc_rtas_poweron_write(struct file *file, 147 const char __user *buf, size_t count, loff_t *ppos); 148 149 static ssize_t ppc_rtas_tone_freq_write(struct file *file, 150 const char __user *buf, size_t count, loff_t *ppos); 151 static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v); 152 static ssize_t ppc_rtas_tone_volume_write(struct file *file, 153 const char __user *buf, size_t count, loff_t *ppos); 154 static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v); 155 static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v); 156 157 static int poweron_open(struct inode *inode, struct file *file) 158 { 159 return single_open(file, ppc_rtas_poweron_show, NULL); 160 } 161 162 static const struct proc_ops ppc_rtas_poweron_proc_ops = { 163 .proc_open = poweron_open, 164 .proc_read = seq_read, 165 .proc_lseek = seq_lseek, 166 .proc_write = ppc_rtas_poweron_write, 167 .proc_release = single_release, 168 }; 169 170 static int progress_open(struct inode *inode, struct file *file) 171 { 172 return single_open(file, ppc_rtas_progress_show, NULL); 173 } 174 175 static const struct proc_ops ppc_rtas_progress_proc_ops = { 176 .proc_open = progress_open, 177 .proc_read = seq_read, 178 .proc_lseek = seq_lseek, 179 .proc_write = ppc_rtas_progress_write, 180 .proc_release = single_release, 181 }; 182 183 static int clock_open(struct inode *inode, struct file *file) 184 { 185 return single_open(file, ppc_rtas_clock_show, NULL); 186 } 187 188 static const struct proc_ops ppc_rtas_clock_proc_ops = { 189 .proc_open = clock_open, 190 .proc_read = seq_read, 191 .proc_lseek = seq_lseek, 192 .proc_write = ppc_rtas_clock_write, 193 .proc_release = single_release, 194 }; 195 196 static int tone_freq_open(struct inode *inode, struct file *file) 197 { 198 return single_open(file, ppc_rtas_tone_freq_show, NULL); 199 } 200 201 static const struct proc_ops ppc_rtas_tone_freq_proc_ops = { 202 .proc_open = tone_freq_open, 203 .proc_read = seq_read, 204 .proc_lseek = seq_lseek, 205 .proc_write = ppc_rtas_tone_freq_write, 206 .proc_release = single_release, 207 }; 208 209 static int tone_volume_open(struct inode *inode, struct file *file) 210 { 211 return single_open(file, ppc_rtas_tone_volume_show, NULL); 212 } 213 214 static const struct proc_ops ppc_rtas_tone_volume_proc_ops = { 215 .proc_open = tone_volume_open, 216 .proc_read = seq_read, 217 .proc_lseek = seq_lseek, 218 .proc_write = ppc_rtas_tone_volume_write, 219 .proc_release = single_release, 220 }; 221 222 static int ppc_rtas_find_all_sensors(void); 223 static void ppc_rtas_process_sensor(struct seq_file *m, 224 struct individual_sensor *s, int state, int error, const char *loc); 225 static char *ppc_rtas_process_error(int error); 226 static void get_location_code(struct seq_file *m, 227 struct individual_sensor *s, const char *loc); 228 static void check_location_string(struct seq_file *m, const char *c); 229 static void check_location(struct seq_file *m, const char *c); 230 231 static int __init proc_rtas_init(void) 232 { 233 if (!machine_is(pseries)) 234 return -ENODEV; 235 236 rtas_node = of_find_node_by_name(NULL, "rtas"); 237 if (rtas_node == NULL) 238 return -ENODEV; 239 240 proc_create("powerpc/rtas/progress", 0644, NULL, 241 &ppc_rtas_progress_proc_ops); 242 proc_create("powerpc/rtas/clock", 0644, NULL, 243 &ppc_rtas_clock_proc_ops); 244 proc_create("powerpc/rtas/poweron", 0644, NULL, 245 &ppc_rtas_poweron_proc_ops); 246 proc_create_single("powerpc/rtas/sensors", 0444, NULL, 247 ppc_rtas_sensors_show); 248 proc_create("powerpc/rtas/frequency", 0644, NULL, 249 &ppc_rtas_tone_freq_proc_ops); 250 proc_create("powerpc/rtas/volume", 0644, NULL, 251 &ppc_rtas_tone_volume_proc_ops); 252 proc_create_single("powerpc/rtas/rmo_buffer", 0400, NULL, 253 ppc_rtas_rmo_buf_show); 254 return 0; 255 } 256 257 __initcall(proc_rtas_init); 258 259 static int parse_number(const char __user *p, size_t count, u64 *val) 260 { 261 char buf[40]; 262 263 if (count > 39) 264 return -EINVAL; 265 266 if (copy_from_user(buf, p, count)) 267 return -EFAULT; 268 269 buf[count] = 0; 270 271 return kstrtoull(buf, 10, val); 272 } 273 274 /* ****************************************************************** */ 275 /* POWER-ON-TIME */ 276 /* ****************************************************************** */ 277 static ssize_t ppc_rtas_poweron_write(struct file *file, 278 const char __user *buf, size_t count, loff_t *ppos) 279 { 280 struct rtc_time tm; 281 time64_t nowtime; 282 int error = parse_number(buf, count, &nowtime); 283 if (error) 284 return error; 285 286 power_on_time = nowtime; /* save the time */ 287 288 rtc_time64_to_tm(nowtime, &tm); 289 290 error = rtas_call(rtas_function_token(RTAS_FN_SET_TIME_FOR_POWER_ON), 7, 1, NULL, 291 tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, 292 tm.tm_hour, tm.tm_min, tm.tm_sec, 0 /* nano */); 293 if (error) 294 printk(KERN_WARNING "error: setting poweron time returned: %s\n", 295 ppc_rtas_process_error(error)); 296 return count; 297 } 298 /* ****************************************************************** */ 299 static int ppc_rtas_poweron_show(struct seq_file *m, void *v) 300 { 301 if (power_on_time == 0) 302 seq_printf(m, "Power on time not set\n"); 303 else 304 seq_printf(m, "%lu\n",power_on_time); 305 return 0; 306 } 307 308 /* ****************************************************************** */ 309 /* PROGRESS */ 310 /* ****************************************************************** */ 311 static ssize_t ppc_rtas_progress_write(struct file *file, 312 const char __user *buf, size_t count, loff_t *ppos) 313 { 314 unsigned long hex; 315 316 if (count >= MAX_LINELENGTH) 317 count = MAX_LINELENGTH -1; 318 if (copy_from_user(progress_led, buf, count)) { /* save the string */ 319 return -EFAULT; 320 } 321 progress_led[count] = 0; 322 323 /* Lets see if the user passed hexdigits */ 324 hex = simple_strtoul(progress_led, NULL, 10); 325 326 rtas_progress ((char *)progress_led, hex); 327 return count; 328 329 /* clear the line */ 330 /* rtas_progress(" ", 0xffff);*/ 331 } 332 /* ****************************************************************** */ 333 static int ppc_rtas_progress_show(struct seq_file *m, void *v) 334 { 335 if (progress_led[0]) 336 seq_printf(m, "%s\n", progress_led); 337 return 0; 338 } 339 340 /* ****************************************************************** */ 341 /* CLOCK */ 342 /* ****************************************************************** */ 343 static ssize_t ppc_rtas_clock_write(struct file *file, 344 const char __user *buf, size_t count, loff_t *ppos) 345 { 346 struct rtc_time tm; 347 time64_t nowtime; 348 int error = parse_number(buf, count, &nowtime); 349 if (error) 350 return error; 351 352 rtc_time64_to_tm(nowtime, &tm); 353 error = rtas_call(rtas_function_token(RTAS_FN_SET_TIME_OF_DAY), 7, 1, NULL, 354 tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, 355 tm.tm_hour, tm.tm_min, tm.tm_sec, 0); 356 if (error) 357 printk(KERN_WARNING "error: setting the clock returned: %s\n", 358 ppc_rtas_process_error(error)); 359 return count; 360 } 361 /* ****************************************************************** */ 362 static int ppc_rtas_clock_show(struct seq_file *m, void *v) 363 { 364 int ret[8]; 365 int error = rtas_call(rtas_function_token(RTAS_FN_GET_TIME_OF_DAY), 0, 8, ret); 366 367 if (error) { 368 printk(KERN_WARNING "error: reading the clock returned: %s\n", 369 ppc_rtas_process_error(error)); 370 seq_printf(m, "0"); 371 } else { 372 unsigned int year, mon, day, hour, min, sec; 373 year = ret[0]; mon = ret[1]; day = ret[2]; 374 hour = ret[3]; min = ret[4]; sec = ret[5]; 375 seq_printf(m, "%lld\n", 376 mktime64(year, mon, day, hour, min, sec)); 377 } 378 return 0; 379 } 380 381 /* ****************************************************************** */ 382 /* SENSOR STUFF */ 383 /* ****************************************************************** */ 384 static int ppc_rtas_sensors_show(struct seq_file *m, void *v) 385 { 386 int i,j; 387 int state, error; 388 int get_sensor_state = rtas_function_token(RTAS_FN_GET_SENSOR_STATE); 389 390 seq_printf(m, "RTAS (RunTime Abstraction Services) Sensor Information\n"); 391 seq_printf(m, "Sensor\t\tValue\t\tCondition\tLocation\n"); 392 seq_printf(m, "********************************************************\n"); 393 394 if (ppc_rtas_find_all_sensors() != 0) { 395 seq_printf(m, "\nNo sensors are available\n"); 396 return 0; 397 } 398 399 for (i=0; i<sensors.quant; i++) { 400 struct individual_sensor *p = &sensors.sensor[i]; 401 char rstr[64]; 402 const char *loc; 403 int llen, offs; 404 405 sprintf (rstr, SENSOR_PREFIX"%04d", p->token); 406 loc = of_get_property(rtas_node, rstr, &llen); 407 408 /* A sensor may have multiple instances */ 409 for (j = 0, offs = 0; j <= p->quant; j++) { 410 error = rtas_call(get_sensor_state, 2, 2, &state, 411 p->token, j); 412 413 ppc_rtas_process_sensor(m, p, state, error, loc); 414 seq_putc(m, '\n'); 415 if (loc) { 416 offs += strlen(loc) + 1; 417 loc += strlen(loc) + 1; 418 if (offs >= llen) 419 loc = NULL; 420 } 421 } 422 } 423 return 0; 424 } 425 426 /* ****************************************************************** */ 427 428 static int ppc_rtas_find_all_sensors(void) 429 { 430 const unsigned int *utmp; 431 int len, i; 432 433 utmp = of_get_property(rtas_node, "rtas-sensors", &len); 434 if (utmp == NULL) { 435 printk (KERN_ERR "error: could not get rtas-sensors\n"); 436 return 1; 437 } 438 439 sensors.quant = len / 8; /* int + int */ 440 441 for (i=0; i<sensors.quant; i++) { 442 sensors.sensor[i].token = *utmp++; 443 sensors.sensor[i].quant = *utmp++; 444 } 445 return 0; 446 } 447 448 /* ****************************************************************** */ 449 /* 450 * Builds a string of what rtas returned 451 */ 452 static char *ppc_rtas_process_error(int error) 453 { 454 switch (error) { 455 case SENSOR_CRITICAL_HIGH: 456 return "(critical high)"; 457 case SENSOR_WARNING_HIGH: 458 return "(warning high)"; 459 case SENSOR_NORMAL: 460 return "(normal)"; 461 case SENSOR_WARNING_LOW: 462 return "(warning low)"; 463 case SENSOR_CRITICAL_LOW: 464 return "(critical low)"; 465 case SENSOR_SUCCESS: 466 return "(read ok)"; 467 case SENSOR_HW_ERROR: 468 return "(hardware error)"; 469 case SENSOR_BUSY: 470 return "(busy)"; 471 case SENSOR_NOT_EXIST: 472 return "(non existent)"; 473 case SENSOR_DR_ENTITY: 474 return "(dr entity removed)"; 475 default: 476 return "(UNKNOWN)"; 477 } 478 } 479 480 /* ****************************************************************** */ 481 /* 482 * Builds a string out of what the sensor said 483 */ 484 485 static void ppc_rtas_process_sensor(struct seq_file *m, 486 struct individual_sensor *s, int state, int error, const char *loc) 487 { 488 /* Defined return vales */ 489 const char * key_switch[] = { "Off\t", "Normal\t", "Secure\t", 490 "Maintenance" }; 491 const char * enclosure_switch[] = { "Closed", "Open" }; 492 const char * lid_status[] = { " ", "Open", "Closed" }; 493 const char * power_source[] = { "AC\t", "Battery", 494 "AC & Battery" }; 495 const char * battery_remaining[] = { "Very Low", "Low", "Mid", "High" }; 496 const char * epow_sensor[] = { 497 "EPOW Reset", "Cooling warning", "Power warning", 498 "System shutdown", "System halt", "EPOW main enclosure", 499 "EPOW power off" }; 500 const char * battery_cyclestate[] = { "None", "In progress", 501 "Requested" }; 502 const char * battery_charging[] = { "Charging", "Discharging", 503 "No current flow" }; 504 const char * ibm_drconnector[] = { "Empty", "Present", "Unusable", 505 "Exchange" }; 506 507 int have_strings = 0; 508 int num_states = 0; 509 int temperature = 0; 510 int unknown = 0; 511 512 /* What kind of sensor do we have here? */ 513 514 switch (s->token) { 515 case KEY_SWITCH: 516 seq_printf(m, "Key switch:\t"); 517 num_states = sizeof(key_switch) / sizeof(char *); 518 if (state < num_states) { 519 seq_printf(m, "%s\t", key_switch[state]); 520 have_strings = 1; 521 } 522 break; 523 case ENCLOSURE_SWITCH: 524 seq_printf(m, "Enclosure switch:\t"); 525 num_states = sizeof(enclosure_switch) / sizeof(char *); 526 if (state < num_states) { 527 seq_printf(m, "%s\t", 528 enclosure_switch[state]); 529 have_strings = 1; 530 } 531 break; 532 case THERMAL_SENSOR: 533 seq_printf(m, "Temp. (C/F):\t"); 534 temperature = 1; 535 break; 536 case LID_STATUS: 537 seq_printf(m, "Lid status:\t"); 538 num_states = sizeof(lid_status) / sizeof(char *); 539 if (state < num_states) { 540 seq_printf(m, "%s\t", lid_status[state]); 541 have_strings = 1; 542 } 543 break; 544 case POWER_SOURCE: 545 seq_printf(m, "Power source:\t"); 546 num_states = sizeof(power_source) / sizeof(char *); 547 if (state < num_states) { 548 seq_printf(m, "%s\t", 549 power_source[state]); 550 have_strings = 1; 551 } 552 break; 553 case BATTERY_VOLTAGE: 554 seq_printf(m, "Battery voltage:\t"); 555 break; 556 case BATTERY_REMAINING: 557 seq_printf(m, "Battery remaining:\t"); 558 num_states = sizeof(battery_remaining) / sizeof(char *); 559 if (state < num_states) 560 { 561 seq_printf(m, "%s\t", 562 battery_remaining[state]); 563 have_strings = 1; 564 } 565 break; 566 case BATTERY_PERCENTAGE: 567 seq_printf(m, "Battery percentage:\t"); 568 break; 569 case EPOW_SENSOR: 570 seq_printf(m, "EPOW Sensor:\t"); 571 num_states = sizeof(epow_sensor) / sizeof(char *); 572 if (state < num_states) { 573 seq_printf(m, "%s\t", epow_sensor[state]); 574 have_strings = 1; 575 } 576 break; 577 case BATTERY_CYCLESTATE: 578 seq_printf(m, "Battery cyclestate:\t"); 579 num_states = sizeof(battery_cyclestate) / 580 sizeof(char *); 581 if (state < num_states) { 582 seq_printf(m, "%s\t", 583 battery_cyclestate[state]); 584 have_strings = 1; 585 } 586 break; 587 case BATTERY_CHARGING: 588 seq_printf(m, "Battery Charging:\t"); 589 num_states = sizeof(battery_charging) / sizeof(char *); 590 if (state < num_states) { 591 seq_printf(m, "%s\t", 592 battery_charging[state]); 593 have_strings = 1; 594 } 595 break; 596 case IBM_SURVEILLANCE: 597 seq_printf(m, "Surveillance:\t"); 598 break; 599 case IBM_FANRPM: 600 seq_printf(m, "Fan (rpm):\t"); 601 break; 602 case IBM_VOLTAGE: 603 seq_printf(m, "Voltage (mv):\t"); 604 break; 605 case IBM_DRCONNECTOR: 606 seq_printf(m, "DR connector:\t"); 607 num_states = sizeof(ibm_drconnector) / sizeof(char *); 608 if (state < num_states) { 609 seq_printf(m, "%s\t", 610 ibm_drconnector[state]); 611 have_strings = 1; 612 } 613 break; 614 case IBM_POWERSUPPLY: 615 seq_printf(m, "Powersupply:\t"); 616 break; 617 default: 618 seq_printf(m, "Unknown sensor (type %d), ignoring it\n", 619 s->token); 620 unknown = 1; 621 have_strings = 1; 622 break; 623 } 624 if (have_strings == 0) { 625 if (temperature) { 626 seq_printf(m, "%4d /%4d\t", state, cel_to_fahr(state)); 627 } else 628 seq_printf(m, "%10d\t", state); 629 } 630 if (unknown == 0) { 631 seq_printf(m, "%s\t", ppc_rtas_process_error(error)); 632 get_location_code(m, s, loc); 633 } 634 } 635 636 /* ****************************************************************** */ 637 638 static void check_location(struct seq_file *m, const char *c) 639 { 640 switch (c[0]) { 641 case LOC_PLANAR: 642 seq_printf(m, "Planar #%c", c[1]); 643 break; 644 case LOC_CPU: 645 seq_printf(m, "CPU #%c", c[1]); 646 break; 647 case LOC_FAN: 648 seq_printf(m, "Fan #%c", c[1]); 649 break; 650 case LOC_RACKMOUNTED: 651 seq_printf(m, "Rack #%c", c[1]); 652 break; 653 case LOC_VOLTAGE: 654 seq_printf(m, "Voltage #%c", c[1]); 655 break; 656 case LOC_LCD: 657 seq_printf(m, "LCD #%c", c[1]); 658 break; 659 case '.': 660 seq_printf(m, "- %c", c[1]); 661 break; 662 default: 663 seq_printf(m, "Unknown location"); 664 break; 665 } 666 } 667 668 669 /* ****************************************************************** */ 670 /* 671 * Format: 672 * ${LETTER}${NUMBER}[[-/]${LETTER}${NUMBER} [ ... ] ] 673 * the '.' may be an abbreviation 674 */ 675 static void check_location_string(struct seq_file *m, const char *c) 676 { 677 while (*c) { 678 if (isalpha(*c) || *c == '.') 679 check_location(m, c); 680 else if (*c == '/' || *c == '-') 681 seq_printf(m, " at "); 682 c++; 683 } 684 } 685 686 687 /* ****************************************************************** */ 688 689 static void get_location_code(struct seq_file *m, struct individual_sensor *s, 690 const char *loc) 691 { 692 if (!loc || !*loc) { 693 seq_printf(m, "---");/* does not have a location */ 694 } else { 695 check_location_string(m, loc); 696 } 697 seq_putc(m, ' '); 698 } 699 /* ****************************************************************** */ 700 /* INDICATORS - Tone Frequency */ 701 /* ****************************************************************** */ 702 static ssize_t ppc_rtas_tone_freq_write(struct file *file, 703 const char __user *buf, size_t count, loff_t *ppos) 704 { 705 u64 freq; 706 int error = parse_number(buf, count, &freq); 707 if (error) 708 return error; 709 710 rtas_tone_frequency = freq; /* save it for later */ 711 error = rtas_call(rtas_function_token(RTAS_FN_SET_INDICATOR), 3, 1, NULL, 712 TONE_FREQUENCY, 0, freq); 713 if (error) 714 printk(KERN_WARNING "error: setting tone frequency returned: %s\n", 715 ppc_rtas_process_error(error)); 716 return count; 717 } 718 /* ****************************************************************** */ 719 static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v) 720 { 721 seq_printf(m, "%lu\n", rtas_tone_frequency); 722 return 0; 723 } 724 /* ****************************************************************** */ 725 /* INDICATORS - Tone Volume */ 726 /* ****************************************************************** */ 727 static ssize_t ppc_rtas_tone_volume_write(struct file *file, 728 const char __user *buf, size_t count, loff_t *ppos) 729 { 730 u64 volume; 731 int error = parse_number(buf, count, &volume); 732 if (error) 733 return error; 734 735 if (volume > 100) 736 volume = 100; 737 738 rtas_tone_volume = volume; /* save it for later */ 739 error = rtas_call(rtas_function_token(RTAS_FN_SET_INDICATOR), 3, 1, NULL, 740 TONE_VOLUME, 0, volume); 741 if (error) 742 printk(KERN_WARNING "error: setting tone volume returned: %s\n", 743 ppc_rtas_process_error(error)); 744 return count; 745 } 746 /* ****************************************************************** */ 747 static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v) 748 { 749 seq_printf(m, "%lu\n", rtas_tone_volume); 750 return 0; 751 } 752 753 /** 754 * ppc_rtas_rmo_buf_show() - Describe RTAS-addressable region for user space. 755 * @m: seq_file output target. 756 * @v: Unused. 757 * 758 * Base + size description of a range of RTAS-addressable memory set 759 * aside for user space to use as work area(s) for certain RTAS 760 * functions. User space accesses this region via /dev/mem. Apart from 761 * security policies, the kernel does not arbitrate or serialize 762 * access to this region, and user space must ensure that concurrent 763 * users do not interfere with each other. 764 */ 765 static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v) 766 { 767 seq_printf(m, "%016lx %x\n", rtas_rmo_buf, RTAS_USER_REGION_SIZE); 768 return 0; 769 } 770